Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
9611c187 | 8 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
13 | * | |
14 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
15 | * the COPYING file in the top-level directory. | |
16 | * | |
17 | */ | |
18 | ||
85f455f7 | 19 | #include "irq.h" |
1d737c8a | 20 | #include "mmu.h" |
00b27a3e | 21 | #include "cpuid.h" |
d62caabb | 22 | #include "lapic.h" |
b8bbab92 | 23 | #include "hyperv.h" |
e495606d | 24 | |
edf88417 | 25 | #include <linux/kvm_host.h> |
6aa8b732 | 26 | #include <linux/module.h> |
9d8f549d | 27 | #include <linux/kernel.h> |
6aa8b732 AK |
28 | #include <linux/mm.h> |
29 | #include <linux/highmem.h> | |
e8edc6e0 | 30 | #include <linux/sched.h> |
c7addb90 | 31 | #include <linux/moduleparam.h> |
e9bda3b3 | 32 | #include <linux/mod_devicetable.h> |
af658dca | 33 | #include <linux/trace_events.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
cafd6659 | 35 | #include <linux/tboot.h> |
f4124500 | 36 | #include <linux/hrtimer.h> |
c207aee4 | 37 | #include <linux/frame.h> |
085331df | 38 | #include <linux/nospec.h> |
5fdbf976 | 39 | #include "kvm_cache_regs.h" |
35920a35 | 40 | #include "x86.h" |
e495606d | 41 | |
fd8ca6da | 42 | #include <asm/asm.h> |
28b835d6 | 43 | #include <asm/cpu.h> |
6aa8b732 | 44 | #include <asm/io.h> |
3b3be0d1 | 45 | #include <asm/desc.h> |
13673a90 | 46 | #include <asm/vmx.h> |
6210e37b | 47 | #include <asm/virtext.h> |
a0861c02 | 48 | #include <asm/mce.h> |
952f07ec | 49 | #include <asm/fpu/internal.h> |
d7cd9796 | 50 | #include <asm/perf_event.h> |
81908bf4 | 51 | #include <asm/debugreg.h> |
8f536b76 | 52 | #include <asm/kexec.h> |
dab2087d | 53 | #include <asm/apic.h> |
efc64404 | 54 | #include <asm/irq_remapping.h> |
d6e41f11 | 55 | #include <asm/mmu_context.h> |
28a27752 | 56 | #include <asm/spec-ctrl.h> |
773e8a04 | 57 | #include <asm/mshyperv.h> |
6aa8b732 | 58 | |
229456fc | 59 | #include "trace.h" |
25462f7f | 60 | #include "pmu.h" |
773e8a04 | 61 | #include "vmx_evmcs.h" |
229456fc | 62 | |
4ecac3fd | 63 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
5e520e62 | 64 | #define __ex_clear(x, reg) \ |
43ce76ce | 65 | ____kvm_handle_fault_on_reboot(x, "xor " reg ", " reg) |
4ecac3fd | 66 | |
6aa8b732 AK |
67 | MODULE_AUTHOR("Qumranet"); |
68 | MODULE_LICENSE("GPL"); | |
69 | ||
e9bda3b3 JT |
70 | static const struct x86_cpu_id vmx_cpu_id[] = { |
71 | X86_FEATURE_MATCH(X86_FEATURE_VMX), | |
72 | {} | |
73 | }; | |
74 | MODULE_DEVICE_TABLE(x86cpu, vmx_cpu_id); | |
75 | ||
476bc001 | 76 | static bool __read_mostly enable_vpid = 1; |
736caefe | 77 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 78 | |
d02fcf50 PB |
79 | static bool __read_mostly enable_vnmi = 1; |
80 | module_param_named(vnmi, enable_vnmi, bool, S_IRUGO); | |
81 | ||
476bc001 | 82 | static bool __read_mostly flexpriority_enabled = 1; |
736caefe | 83 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 84 | |
476bc001 | 85 | static bool __read_mostly enable_ept = 1; |
736caefe | 86 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 87 | |
476bc001 | 88 | static bool __read_mostly enable_unrestricted_guest = 1; |
3a624e29 NK |
89 | module_param_named(unrestricted_guest, |
90 | enable_unrestricted_guest, bool, S_IRUGO); | |
91 | ||
83c3a331 XH |
92 | static bool __read_mostly enable_ept_ad_bits = 1; |
93 | module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO); | |
94 | ||
a27685c3 | 95 | static bool __read_mostly emulate_invalid_guest_state = true; |
c1f8bc04 | 96 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 97 | |
476bc001 | 98 | static bool __read_mostly fasteoi = 1; |
58fbbf26 KT |
99 | module_param(fasteoi, bool, S_IRUGO); |
100 | ||
5a71785d | 101 | static bool __read_mostly enable_apicv = 1; |
01e439be | 102 | module_param(enable_apicv, bool, S_IRUGO); |
83d4c286 | 103 | |
abc4fc58 AG |
104 | static bool __read_mostly enable_shadow_vmcs = 1; |
105 | module_param_named(enable_shadow_vmcs, enable_shadow_vmcs, bool, S_IRUGO); | |
801d3424 NHE |
106 | /* |
107 | * If nested=1, nested virtualization is supported, i.e., guests may use | |
108 | * VMX and be a hypervisor for its own guests. If nested=0, guests may not | |
109 | * use VMX instructions. | |
110 | */ | |
1e58e5e5 | 111 | static bool __read_mostly nested = 1; |
801d3424 NHE |
112 | module_param(nested, bool, S_IRUGO); |
113 | ||
52017608 SC |
114 | static bool __read_mostly nested_early_check = 0; |
115 | module_param(nested_early_check, bool, S_IRUGO); | |
116 | ||
20300099 WL |
117 | static u64 __read_mostly host_xss; |
118 | ||
843e4330 KH |
119 | static bool __read_mostly enable_pml = 1; |
120 | module_param_named(pml, enable_pml, bool, S_IRUGO); | |
121 | ||
904e14fb PB |
122 | #define MSR_TYPE_R 1 |
123 | #define MSR_TYPE_W 2 | |
124 | #define MSR_TYPE_RW 3 | |
125 | ||
126 | #define MSR_BITMAP_MODE_X2APIC 1 | |
127 | #define MSR_BITMAP_MODE_X2APIC_APICV 2 | |
904e14fb | 128 | |
64903d61 HZ |
129 | #define KVM_VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL |
130 | ||
64672c95 YJ |
131 | /* Guest_tsc -> host_tsc conversion requires 64-bit division. */ |
132 | static int __read_mostly cpu_preemption_timer_multi; | |
133 | static bool __read_mostly enable_preemption_timer = 1; | |
134 | #ifdef CONFIG_X86_64 | |
135 | module_param_named(preemption_timer, enable_preemption_timer, bool, S_IRUGO); | |
136 | #endif | |
137 | ||
3de6347b | 138 | #define KVM_VM_CR0_ALWAYS_OFF (X86_CR0_NW | X86_CR0_CD) |
1706bd0c SC |
139 | #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST X86_CR0_NE |
140 | #define KVM_VM_CR0_ALWAYS_ON \ | |
141 | (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | \ | |
142 | X86_CR0_WP | X86_CR0_PG | X86_CR0_PE) | |
4c38609a AK |
143 | #define KVM_CR4_GUEST_OWNED_BITS \ |
144 | (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
fd8cb433 | 145 | | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_TSD) |
4c38609a | 146 | |
5dc1f044 | 147 | #define KVM_VM_CR4_ALWAYS_ON_UNRESTRICTED_GUEST X86_CR4_VMXE |
cdc0e244 AK |
148 | #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) |
149 | #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) | |
150 | ||
78ac8b47 AK |
151 | #define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM)) |
152 | ||
f4124500 JK |
153 | #define VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE 5 |
154 | ||
16c2aec6 JD |
155 | /* |
156 | * Hyper-V requires all of these, so mark them as supported even though | |
157 | * they are just treated the same as all-context. | |
158 | */ | |
159 | #define VMX_VPID_EXTENT_SUPPORTED_MASK \ | |
160 | (VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT | \ | |
161 | VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT | \ | |
162 | VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT | \ | |
163 | VMX_VPID_EXTENT_SINGLE_NON_GLOBAL_BIT) | |
164 | ||
4b8d54f9 ZE |
165 | /* |
166 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
167 | * ple_gap: upper bound on the amount of time between two successive | |
168 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
00c25bce | 169 | * According to test, this time is usually smaller than 128 cycles. |
4b8d54f9 ZE |
170 | * ple_window: upper bound on the amount of time a guest is allowed to execute |
171 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
172 | * less than 2^12 cycles | |
173 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
174 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
175 | */ | |
c8e88717 | 176 | static unsigned int ple_gap = KVM_DEFAULT_PLE_GAP; |
b4a2d31d | 177 | |
7fbc85a5 BM |
178 | static unsigned int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; |
179 | module_param(ple_window, uint, 0444); | |
4b8d54f9 | 180 | |
b4a2d31d | 181 | /* Default doubles per-vcpu window every exit. */ |
c8e88717 | 182 | static unsigned int ple_window_grow = KVM_DEFAULT_PLE_WINDOW_GROW; |
7fbc85a5 | 183 | module_param(ple_window_grow, uint, 0444); |
b4a2d31d RK |
184 | |
185 | /* Default resets per-vcpu window every exit to ple_window. */ | |
c8e88717 | 186 | static unsigned int ple_window_shrink = KVM_DEFAULT_PLE_WINDOW_SHRINK; |
7fbc85a5 | 187 | module_param(ple_window_shrink, uint, 0444); |
b4a2d31d RK |
188 | |
189 | /* Default is to compute the maximum so we can never overflow. */ | |
7fbc85a5 BM |
190 | static unsigned int ple_window_max = KVM_VMX_DEFAULT_PLE_WINDOW_MAX; |
191 | module_param(ple_window_max, uint, 0444); | |
b4a2d31d | 192 | |
83287ea4 | 193 | extern const ulong vmx_return; |
52017608 | 194 | extern const ulong vmx_early_consistency_check_return; |
83287ea4 | 195 | |
a399477e | 196 | static DEFINE_STATIC_KEY_FALSE(vmx_l1d_should_flush); |
427362a1 | 197 | static DEFINE_STATIC_KEY_FALSE(vmx_l1d_flush_cond); |
dd4bfa73 | 198 | static DEFINE_MUTEX(vmx_l1d_flush_mutex); |
a399477e | 199 | |
7db92e16 TG |
200 | /* Storage for pre module init parameter parsing */ |
201 | static enum vmx_l1d_flush_state __read_mostly vmentry_l1d_flush_param = VMENTER_L1D_FLUSH_AUTO; | |
a399477e KRW |
202 | |
203 | static const struct { | |
204 | const char *option; | |
0027ff2a | 205 | bool for_parse; |
a399477e | 206 | } vmentry_l1d_param[] = { |
0027ff2a PB |
207 | [VMENTER_L1D_FLUSH_AUTO] = {"auto", true}, |
208 | [VMENTER_L1D_FLUSH_NEVER] = {"never", true}, | |
209 | [VMENTER_L1D_FLUSH_COND] = {"cond", true}, | |
210 | [VMENTER_L1D_FLUSH_ALWAYS] = {"always", true}, | |
211 | [VMENTER_L1D_FLUSH_EPT_DISABLED] = {"EPT disabled", false}, | |
212 | [VMENTER_L1D_FLUSH_NOT_REQUIRED] = {"not required", false}, | |
a399477e KRW |
213 | }; |
214 | ||
7db92e16 TG |
215 | #define L1D_CACHE_ORDER 4 |
216 | static void *vmx_l1d_flush_pages; | |
217 | ||
218 | static int vmx_setup_l1d_flush(enum vmx_l1d_flush_state l1tf) | |
a399477e | 219 | { |
7db92e16 | 220 | struct page *page; |
288d152c | 221 | unsigned int i; |
a399477e | 222 | |
7db92e16 TG |
223 | if (!enable_ept) { |
224 | l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_EPT_DISABLED; | |
225 | return 0; | |
a399477e KRW |
226 | } |
227 | ||
d806afa4 YW |
228 | if (boot_cpu_has(X86_FEATURE_ARCH_CAPABILITIES)) { |
229 | u64 msr; | |
230 | ||
231 | rdmsrl(MSR_IA32_ARCH_CAPABILITIES, msr); | |
232 | if (msr & ARCH_CAP_SKIP_VMENTRY_L1DFLUSH) { | |
233 | l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_NOT_REQUIRED; | |
234 | return 0; | |
235 | } | |
236 | } | |
8e0b2b91 | 237 | |
d90a7a0e JK |
238 | /* If set to auto use the default l1tf mitigation method */ |
239 | if (l1tf == VMENTER_L1D_FLUSH_AUTO) { | |
240 | switch (l1tf_mitigation) { | |
241 | case L1TF_MITIGATION_OFF: | |
242 | l1tf = VMENTER_L1D_FLUSH_NEVER; | |
243 | break; | |
244 | case L1TF_MITIGATION_FLUSH_NOWARN: | |
245 | case L1TF_MITIGATION_FLUSH: | |
246 | case L1TF_MITIGATION_FLUSH_NOSMT: | |
247 | l1tf = VMENTER_L1D_FLUSH_COND; | |
248 | break; | |
249 | case L1TF_MITIGATION_FULL: | |
250 | case L1TF_MITIGATION_FULL_FORCE: | |
251 | l1tf = VMENTER_L1D_FLUSH_ALWAYS; | |
252 | break; | |
253 | } | |
254 | } else if (l1tf_mitigation == L1TF_MITIGATION_FULL_FORCE) { | |
255 | l1tf = VMENTER_L1D_FLUSH_ALWAYS; | |
256 | } | |
257 | ||
7db92e16 TG |
258 | if (l1tf != VMENTER_L1D_FLUSH_NEVER && !vmx_l1d_flush_pages && |
259 | !boot_cpu_has(X86_FEATURE_FLUSH_L1D)) { | |
260 | page = alloc_pages(GFP_KERNEL, L1D_CACHE_ORDER); | |
261 | if (!page) | |
262 | return -ENOMEM; | |
263 | vmx_l1d_flush_pages = page_address(page); | |
288d152c NS |
264 | |
265 | /* | |
266 | * Initialize each page with a different pattern in | |
267 | * order to protect against KSM in the nested | |
268 | * virtualization case. | |
269 | */ | |
270 | for (i = 0; i < 1u << L1D_CACHE_ORDER; ++i) { | |
271 | memset(vmx_l1d_flush_pages + i * PAGE_SIZE, i + 1, | |
272 | PAGE_SIZE); | |
273 | } | |
7db92e16 TG |
274 | } |
275 | ||
276 | l1tf_vmx_mitigation = l1tf; | |
277 | ||
895ae47f TG |
278 | if (l1tf != VMENTER_L1D_FLUSH_NEVER) |
279 | static_branch_enable(&vmx_l1d_should_flush); | |
280 | else | |
281 | static_branch_disable(&vmx_l1d_should_flush); | |
4c6523ec | 282 | |
427362a1 NS |
283 | if (l1tf == VMENTER_L1D_FLUSH_COND) |
284 | static_branch_enable(&vmx_l1d_flush_cond); | |
895ae47f | 285 | else |
427362a1 | 286 | static_branch_disable(&vmx_l1d_flush_cond); |
7db92e16 TG |
287 | return 0; |
288 | } | |
289 | ||
290 | static int vmentry_l1d_flush_parse(const char *s) | |
291 | { | |
292 | unsigned int i; | |
293 | ||
294 | if (s) { | |
295 | for (i = 0; i < ARRAY_SIZE(vmentry_l1d_param); i++) { | |
0027ff2a PB |
296 | if (vmentry_l1d_param[i].for_parse && |
297 | sysfs_streq(s, vmentry_l1d_param[i].option)) | |
298 | return i; | |
7db92e16 TG |
299 | } |
300 | } | |
a399477e KRW |
301 | return -EINVAL; |
302 | } | |
303 | ||
7db92e16 TG |
304 | static int vmentry_l1d_flush_set(const char *s, const struct kernel_param *kp) |
305 | { | |
dd4bfa73 | 306 | int l1tf, ret; |
7db92e16 | 307 | |
7db92e16 TG |
308 | l1tf = vmentry_l1d_flush_parse(s); |
309 | if (l1tf < 0) | |
310 | return l1tf; | |
311 | ||
0027ff2a PB |
312 | if (!boot_cpu_has(X86_BUG_L1TF)) |
313 | return 0; | |
314 | ||
7db92e16 TG |
315 | /* |
316 | * Has vmx_init() run already? If not then this is the pre init | |
317 | * parameter parsing. In that case just store the value and let | |
318 | * vmx_init() do the proper setup after enable_ept has been | |
319 | * established. | |
320 | */ | |
321 | if (l1tf_vmx_mitigation == VMENTER_L1D_FLUSH_AUTO) { | |
322 | vmentry_l1d_flush_param = l1tf; | |
323 | return 0; | |
324 | } | |
325 | ||
dd4bfa73 TG |
326 | mutex_lock(&vmx_l1d_flush_mutex); |
327 | ret = vmx_setup_l1d_flush(l1tf); | |
328 | mutex_unlock(&vmx_l1d_flush_mutex); | |
329 | return ret; | |
7db92e16 TG |
330 | } |
331 | ||
a399477e KRW |
332 | static int vmentry_l1d_flush_get(char *s, const struct kernel_param *kp) |
333 | { | |
0027ff2a PB |
334 | if (WARN_ON_ONCE(l1tf_vmx_mitigation >= ARRAY_SIZE(vmentry_l1d_param))) |
335 | return sprintf(s, "???\n"); | |
336 | ||
7db92e16 | 337 | return sprintf(s, "%s\n", vmentry_l1d_param[l1tf_vmx_mitigation].option); |
a399477e KRW |
338 | } |
339 | ||
340 | static const struct kernel_param_ops vmentry_l1d_flush_ops = { | |
341 | .set = vmentry_l1d_flush_set, | |
342 | .get = vmentry_l1d_flush_get, | |
343 | }; | |
895ae47f | 344 | module_param_cb(vmentry_l1d_flush, &vmentry_l1d_flush_ops, NULL, 0644); |
a399477e | 345 | |
877ad952 TL |
346 | enum ept_pointers_status { |
347 | EPT_POINTERS_CHECK = 0, | |
348 | EPT_POINTERS_MATCH = 1, | |
349 | EPT_POINTERS_MISMATCH = 2 | |
350 | }; | |
351 | ||
40bbb9d0 SC |
352 | struct kvm_vmx { |
353 | struct kvm kvm; | |
354 | ||
355 | unsigned int tss_addr; | |
356 | bool ept_identity_pagetable_done; | |
357 | gpa_t ept_identity_map_addr; | |
877ad952 TL |
358 | |
359 | enum ept_pointers_status ept_pointers_match; | |
360 | spinlock_t ept_pointer_lock; | |
40bbb9d0 SC |
361 | }; |
362 | ||
8bf00a52 | 363 | #define NR_AUTOLOAD_MSRS 8 |
61d2ef2c | 364 | |
392b2f25 LA |
365 | struct vmcs_hdr { |
366 | u32 revision_id:31; | |
367 | u32 shadow_vmcs:1; | |
368 | }; | |
369 | ||
a2fa3e9f | 370 | struct vmcs { |
392b2f25 | 371 | struct vmcs_hdr hdr; |
a2fa3e9f GH |
372 | u32 abort; |
373 | char data[0]; | |
374 | }; | |
375 | ||
d7ee039e SC |
376 | /* |
377 | * vmcs_host_state tracks registers that are loaded from the VMCS on VMEXIT | |
378 | * and whose values change infrequently, but are not constant. I.e. this is | |
379 | * used as a write-through cache of the corresponding VMCS fields. | |
380 | */ | |
381 | struct vmcs_host_state { | |
382 | unsigned long cr3; /* May not match real cr3 */ | |
383 | unsigned long cr4; /* May not match real cr4 */ | |
5e079c7e SC |
384 | unsigned long gs_base; |
385 | unsigned long fs_base; | |
d7ee039e SC |
386 | |
387 | u16 fs_sel, gs_sel, ldt_sel; | |
388 | #ifdef CONFIG_X86_64 | |
389 | u16 ds_sel, es_sel; | |
390 | #endif | |
391 | }; | |
392 | ||
d462b819 NHE |
393 | /* |
394 | * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also | |
395 | * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs | |
396 | * loaded on this CPU (so we can clear them if the CPU goes down). | |
397 | */ | |
398 | struct loaded_vmcs { | |
399 | struct vmcs *vmcs; | |
355f4fb1 | 400 | struct vmcs *shadow_vmcs; |
d462b819 | 401 | int cpu; |
4c4a6f79 PB |
402 | bool launched; |
403 | bool nmi_known_unmasked; | |
f459a707 | 404 | bool hv_timer_armed; |
8a1b4392 PB |
405 | /* Support for vnmi-less CPUs */ |
406 | int soft_vnmi_blocked; | |
407 | ktime_t entry_time; | |
408 | s64 vnmi_blocked_time; | |
904e14fb | 409 | unsigned long *msr_bitmap; |
d462b819 | 410 | struct list_head loaded_vmcss_on_cpu_link; |
d7ee039e | 411 | struct vmcs_host_state host_state; |
d462b819 NHE |
412 | }; |
413 | ||
26bb0981 AK |
414 | struct shared_msr_entry { |
415 | unsigned index; | |
416 | u64 data; | |
d5696725 | 417 | u64 mask; |
26bb0981 AK |
418 | }; |
419 | ||
a9d30f33 NHE |
420 | /* |
421 | * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a | |
422 | * single nested guest (L2), hence the name vmcs12. Any VMX implementation has | |
423 | * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is | |
424 | * stored in guest memory specified by VMPTRLD, but is opaque to the guest, | |
425 | * which must access it using VMREAD/VMWRITE/VMCLEAR instructions. | |
426 | * More than one of these structures may exist, if L1 runs multiple L2 guests. | |
de3a0021 | 427 | * nested_vmx_run() will use the data here to build the vmcs02: a VMCS for the |
a9d30f33 NHE |
428 | * underlying hardware which will be used to run L2. |
429 | * This structure is packed to ensure that its layout is identical across | |
430 | * machines (necessary for live migration). | |
b348e793 JM |
431 | * |
432 | * IMPORTANT: Changing the layout of existing fields in this structure | |
433 | * will break save/restore compatibility with older kvm releases. When | |
434 | * adding new fields, either use space in the reserved padding* arrays | |
435 | * or add the new fields to the end of the structure. | |
a9d30f33 | 436 | */ |
22bd0358 | 437 | typedef u64 natural_width; |
a9d30f33 NHE |
438 | struct __packed vmcs12 { |
439 | /* According to the Intel spec, a VMCS region must start with the | |
440 | * following two fields. Then follow implementation-specific data. | |
441 | */ | |
392b2f25 | 442 | struct vmcs_hdr hdr; |
a9d30f33 | 443 | u32 abort; |
22bd0358 | 444 | |
27d6c865 NHE |
445 | u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */ |
446 | u32 padding[7]; /* room for future expansion */ | |
447 | ||
22bd0358 NHE |
448 | u64 io_bitmap_a; |
449 | u64 io_bitmap_b; | |
450 | u64 msr_bitmap; | |
451 | u64 vm_exit_msr_store_addr; | |
452 | u64 vm_exit_msr_load_addr; | |
453 | u64 vm_entry_msr_load_addr; | |
454 | u64 tsc_offset; | |
455 | u64 virtual_apic_page_addr; | |
456 | u64 apic_access_addr; | |
705699a1 | 457 | u64 posted_intr_desc_addr; |
22bd0358 | 458 | u64 ept_pointer; |
608406e2 WV |
459 | u64 eoi_exit_bitmap0; |
460 | u64 eoi_exit_bitmap1; | |
461 | u64 eoi_exit_bitmap2; | |
462 | u64 eoi_exit_bitmap3; | |
81dc01f7 | 463 | u64 xss_exit_bitmap; |
22bd0358 NHE |
464 | u64 guest_physical_address; |
465 | u64 vmcs_link_pointer; | |
466 | u64 guest_ia32_debugctl; | |
467 | u64 guest_ia32_pat; | |
468 | u64 guest_ia32_efer; | |
469 | u64 guest_ia32_perf_global_ctrl; | |
470 | u64 guest_pdptr0; | |
471 | u64 guest_pdptr1; | |
472 | u64 guest_pdptr2; | |
473 | u64 guest_pdptr3; | |
36be0b9d | 474 | u64 guest_bndcfgs; |
22bd0358 NHE |
475 | u64 host_ia32_pat; |
476 | u64 host_ia32_efer; | |
477 | u64 host_ia32_perf_global_ctrl; | |
b348e793 JM |
478 | u64 vmread_bitmap; |
479 | u64 vmwrite_bitmap; | |
480 | u64 vm_function_control; | |
481 | u64 eptp_list_address; | |
482 | u64 pml_address; | |
483 | u64 padding64[3]; /* room for future expansion */ | |
22bd0358 NHE |
484 | /* |
485 | * To allow migration of L1 (complete with its L2 guests) between | |
486 | * machines of different natural widths (32 or 64 bit), we cannot have | |
487 | * unsigned long fields with no explict size. We use u64 (aliased | |
488 | * natural_width) instead. Luckily, x86 is little-endian. | |
489 | */ | |
490 | natural_width cr0_guest_host_mask; | |
491 | natural_width cr4_guest_host_mask; | |
492 | natural_width cr0_read_shadow; | |
493 | natural_width cr4_read_shadow; | |
494 | natural_width cr3_target_value0; | |
495 | natural_width cr3_target_value1; | |
496 | natural_width cr3_target_value2; | |
497 | natural_width cr3_target_value3; | |
498 | natural_width exit_qualification; | |
499 | natural_width guest_linear_address; | |
500 | natural_width guest_cr0; | |
501 | natural_width guest_cr3; | |
502 | natural_width guest_cr4; | |
503 | natural_width guest_es_base; | |
504 | natural_width guest_cs_base; | |
505 | natural_width guest_ss_base; | |
506 | natural_width guest_ds_base; | |
507 | natural_width guest_fs_base; | |
508 | natural_width guest_gs_base; | |
509 | natural_width guest_ldtr_base; | |
510 | natural_width guest_tr_base; | |
511 | natural_width guest_gdtr_base; | |
512 | natural_width guest_idtr_base; | |
513 | natural_width guest_dr7; | |
514 | natural_width guest_rsp; | |
515 | natural_width guest_rip; | |
516 | natural_width guest_rflags; | |
517 | natural_width guest_pending_dbg_exceptions; | |
518 | natural_width guest_sysenter_esp; | |
519 | natural_width guest_sysenter_eip; | |
520 | natural_width host_cr0; | |
521 | natural_width host_cr3; | |
522 | natural_width host_cr4; | |
523 | natural_width host_fs_base; | |
524 | natural_width host_gs_base; | |
525 | natural_width host_tr_base; | |
526 | natural_width host_gdtr_base; | |
527 | natural_width host_idtr_base; | |
528 | natural_width host_ia32_sysenter_esp; | |
529 | natural_width host_ia32_sysenter_eip; | |
530 | natural_width host_rsp; | |
531 | natural_width host_rip; | |
532 | natural_width paddingl[8]; /* room for future expansion */ | |
533 | u32 pin_based_vm_exec_control; | |
534 | u32 cpu_based_vm_exec_control; | |
535 | u32 exception_bitmap; | |
536 | u32 page_fault_error_code_mask; | |
537 | u32 page_fault_error_code_match; | |
538 | u32 cr3_target_count; | |
539 | u32 vm_exit_controls; | |
540 | u32 vm_exit_msr_store_count; | |
541 | u32 vm_exit_msr_load_count; | |
542 | u32 vm_entry_controls; | |
543 | u32 vm_entry_msr_load_count; | |
544 | u32 vm_entry_intr_info_field; | |
545 | u32 vm_entry_exception_error_code; | |
546 | u32 vm_entry_instruction_len; | |
547 | u32 tpr_threshold; | |
548 | u32 secondary_vm_exec_control; | |
549 | u32 vm_instruction_error; | |
550 | u32 vm_exit_reason; | |
551 | u32 vm_exit_intr_info; | |
552 | u32 vm_exit_intr_error_code; | |
553 | u32 idt_vectoring_info_field; | |
554 | u32 idt_vectoring_error_code; | |
555 | u32 vm_exit_instruction_len; | |
556 | u32 vmx_instruction_info; | |
557 | u32 guest_es_limit; | |
558 | u32 guest_cs_limit; | |
559 | u32 guest_ss_limit; | |
560 | u32 guest_ds_limit; | |
561 | u32 guest_fs_limit; | |
562 | u32 guest_gs_limit; | |
563 | u32 guest_ldtr_limit; | |
564 | u32 guest_tr_limit; | |
565 | u32 guest_gdtr_limit; | |
566 | u32 guest_idtr_limit; | |
567 | u32 guest_es_ar_bytes; | |
568 | u32 guest_cs_ar_bytes; | |
569 | u32 guest_ss_ar_bytes; | |
570 | u32 guest_ds_ar_bytes; | |
571 | u32 guest_fs_ar_bytes; | |
572 | u32 guest_gs_ar_bytes; | |
573 | u32 guest_ldtr_ar_bytes; | |
574 | u32 guest_tr_ar_bytes; | |
575 | u32 guest_interruptibility_info; | |
576 | u32 guest_activity_state; | |
577 | u32 guest_sysenter_cs; | |
578 | u32 host_ia32_sysenter_cs; | |
0238ea91 JK |
579 | u32 vmx_preemption_timer_value; |
580 | u32 padding32[7]; /* room for future expansion */ | |
22bd0358 | 581 | u16 virtual_processor_id; |
705699a1 | 582 | u16 posted_intr_nv; |
22bd0358 NHE |
583 | u16 guest_es_selector; |
584 | u16 guest_cs_selector; | |
585 | u16 guest_ss_selector; | |
586 | u16 guest_ds_selector; | |
587 | u16 guest_fs_selector; | |
588 | u16 guest_gs_selector; | |
589 | u16 guest_ldtr_selector; | |
590 | u16 guest_tr_selector; | |
608406e2 | 591 | u16 guest_intr_status; |
22bd0358 NHE |
592 | u16 host_es_selector; |
593 | u16 host_cs_selector; | |
594 | u16 host_ss_selector; | |
595 | u16 host_ds_selector; | |
596 | u16 host_fs_selector; | |
597 | u16 host_gs_selector; | |
598 | u16 host_tr_selector; | |
b348e793 | 599 | u16 guest_pml_index; |
a9d30f33 NHE |
600 | }; |
601 | ||
21ebf53b JM |
602 | /* |
603 | * For save/restore compatibility, the vmcs12 field offsets must not change. | |
604 | */ | |
605 | #define CHECK_OFFSET(field, loc) \ | |
606 | BUILD_BUG_ON_MSG(offsetof(struct vmcs12, field) != (loc), \ | |
607 | "Offset of " #field " in struct vmcs12 has changed.") | |
608 | ||
609 | static inline void vmx_check_vmcs12_offsets(void) { | |
392b2f25 | 610 | CHECK_OFFSET(hdr, 0); |
21ebf53b JM |
611 | CHECK_OFFSET(abort, 4); |
612 | CHECK_OFFSET(launch_state, 8); | |
613 | CHECK_OFFSET(io_bitmap_a, 40); | |
614 | CHECK_OFFSET(io_bitmap_b, 48); | |
615 | CHECK_OFFSET(msr_bitmap, 56); | |
616 | CHECK_OFFSET(vm_exit_msr_store_addr, 64); | |
617 | CHECK_OFFSET(vm_exit_msr_load_addr, 72); | |
618 | CHECK_OFFSET(vm_entry_msr_load_addr, 80); | |
619 | CHECK_OFFSET(tsc_offset, 88); | |
620 | CHECK_OFFSET(virtual_apic_page_addr, 96); | |
621 | CHECK_OFFSET(apic_access_addr, 104); | |
622 | CHECK_OFFSET(posted_intr_desc_addr, 112); | |
623 | CHECK_OFFSET(ept_pointer, 120); | |
624 | CHECK_OFFSET(eoi_exit_bitmap0, 128); | |
625 | CHECK_OFFSET(eoi_exit_bitmap1, 136); | |
626 | CHECK_OFFSET(eoi_exit_bitmap2, 144); | |
627 | CHECK_OFFSET(eoi_exit_bitmap3, 152); | |
628 | CHECK_OFFSET(xss_exit_bitmap, 160); | |
629 | CHECK_OFFSET(guest_physical_address, 168); | |
630 | CHECK_OFFSET(vmcs_link_pointer, 176); | |
631 | CHECK_OFFSET(guest_ia32_debugctl, 184); | |
632 | CHECK_OFFSET(guest_ia32_pat, 192); | |
633 | CHECK_OFFSET(guest_ia32_efer, 200); | |
634 | CHECK_OFFSET(guest_ia32_perf_global_ctrl, 208); | |
635 | CHECK_OFFSET(guest_pdptr0, 216); | |
636 | CHECK_OFFSET(guest_pdptr1, 224); | |
637 | CHECK_OFFSET(guest_pdptr2, 232); | |
638 | CHECK_OFFSET(guest_pdptr3, 240); | |
639 | CHECK_OFFSET(guest_bndcfgs, 248); | |
640 | CHECK_OFFSET(host_ia32_pat, 256); | |
641 | CHECK_OFFSET(host_ia32_efer, 264); | |
642 | CHECK_OFFSET(host_ia32_perf_global_ctrl, 272); | |
643 | CHECK_OFFSET(vmread_bitmap, 280); | |
644 | CHECK_OFFSET(vmwrite_bitmap, 288); | |
645 | CHECK_OFFSET(vm_function_control, 296); | |
646 | CHECK_OFFSET(eptp_list_address, 304); | |
647 | CHECK_OFFSET(pml_address, 312); | |
648 | CHECK_OFFSET(cr0_guest_host_mask, 344); | |
649 | CHECK_OFFSET(cr4_guest_host_mask, 352); | |
650 | CHECK_OFFSET(cr0_read_shadow, 360); | |
651 | CHECK_OFFSET(cr4_read_shadow, 368); | |
652 | CHECK_OFFSET(cr3_target_value0, 376); | |
653 | CHECK_OFFSET(cr3_target_value1, 384); | |
654 | CHECK_OFFSET(cr3_target_value2, 392); | |
655 | CHECK_OFFSET(cr3_target_value3, 400); | |
656 | CHECK_OFFSET(exit_qualification, 408); | |
657 | CHECK_OFFSET(guest_linear_address, 416); | |
658 | CHECK_OFFSET(guest_cr0, 424); | |
659 | CHECK_OFFSET(guest_cr3, 432); | |
660 | CHECK_OFFSET(guest_cr4, 440); | |
661 | CHECK_OFFSET(guest_es_base, 448); | |
662 | CHECK_OFFSET(guest_cs_base, 456); | |
663 | CHECK_OFFSET(guest_ss_base, 464); | |
664 | CHECK_OFFSET(guest_ds_base, 472); | |
665 | CHECK_OFFSET(guest_fs_base, 480); | |
666 | CHECK_OFFSET(guest_gs_base, 488); | |
667 | CHECK_OFFSET(guest_ldtr_base, 496); | |
668 | CHECK_OFFSET(guest_tr_base, 504); | |
669 | CHECK_OFFSET(guest_gdtr_base, 512); | |
670 | CHECK_OFFSET(guest_idtr_base, 520); | |
671 | CHECK_OFFSET(guest_dr7, 528); | |
672 | CHECK_OFFSET(guest_rsp, 536); | |
673 | CHECK_OFFSET(guest_rip, 544); | |
674 | CHECK_OFFSET(guest_rflags, 552); | |
675 | CHECK_OFFSET(guest_pending_dbg_exceptions, 560); | |
676 | CHECK_OFFSET(guest_sysenter_esp, 568); | |
677 | CHECK_OFFSET(guest_sysenter_eip, 576); | |
678 | CHECK_OFFSET(host_cr0, 584); | |
679 | CHECK_OFFSET(host_cr3, 592); | |
680 | CHECK_OFFSET(host_cr4, 600); | |
681 | CHECK_OFFSET(host_fs_base, 608); | |
682 | CHECK_OFFSET(host_gs_base, 616); | |
683 | CHECK_OFFSET(host_tr_base, 624); | |
684 | CHECK_OFFSET(host_gdtr_base, 632); | |
685 | CHECK_OFFSET(host_idtr_base, 640); | |
686 | CHECK_OFFSET(host_ia32_sysenter_esp, 648); | |
687 | CHECK_OFFSET(host_ia32_sysenter_eip, 656); | |
688 | CHECK_OFFSET(host_rsp, 664); | |
689 | CHECK_OFFSET(host_rip, 672); | |
690 | CHECK_OFFSET(pin_based_vm_exec_control, 744); | |
691 | CHECK_OFFSET(cpu_based_vm_exec_control, 748); | |
692 | CHECK_OFFSET(exception_bitmap, 752); | |
693 | CHECK_OFFSET(page_fault_error_code_mask, 756); | |
694 | CHECK_OFFSET(page_fault_error_code_match, 760); | |
695 | CHECK_OFFSET(cr3_target_count, 764); | |
696 | CHECK_OFFSET(vm_exit_controls, 768); | |
697 | CHECK_OFFSET(vm_exit_msr_store_count, 772); | |
698 | CHECK_OFFSET(vm_exit_msr_load_count, 776); | |
699 | CHECK_OFFSET(vm_entry_controls, 780); | |
700 | CHECK_OFFSET(vm_entry_msr_load_count, 784); | |
701 | CHECK_OFFSET(vm_entry_intr_info_field, 788); | |
702 | CHECK_OFFSET(vm_entry_exception_error_code, 792); | |
703 | CHECK_OFFSET(vm_entry_instruction_len, 796); | |
704 | CHECK_OFFSET(tpr_threshold, 800); | |
705 | CHECK_OFFSET(secondary_vm_exec_control, 804); | |
706 | CHECK_OFFSET(vm_instruction_error, 808); | |
707 | CHECK_OFFSET(vm_exit_reason, 812); | |
708 | CHECK_OFFSET(vm_exit_intr_info, 816); | |
709 | CHECK_OFFSET(vm_exit_intr_error_code, 820); | |
710 | CHECK_OFFSET(idt_vectoring_info_field, 824); | |
711 | CHECK_OFFSET(idt_vectoring_error_code, 828); | |
712 | CHECK_OFFSET(vm_exit_instruction_len, 832); | |
713 | CHECK_OFFSET(vmx_instruction_info, 836); | |
714 | CHECK_OFFSET(guest_es_limit, 840); | |
715 | CHECK_OFFSET(guest_cs_limit, 844); | |
716 | CHECK_OFFSET(guest_ss_limit, 848); | |
717 | CHECK_OFFSET(guest_ds_limit, 852); | |
718 | CHECK_OFFSET(guest_fs_limit, 856); | |
719 | CHECK_OFFSET(guest_gs_limit, 860); | |
720 | CHECK_OFFSET(guest_ldtr_limit, 864); | |
721 | CHECK_OFFSET(guest_tr_limit, 868); | |
722 | CHECK_OFFSET(guest_gdtr_limit, 872); | |
723 | CHECK_OFFSET(guest_idtr_limit, 876); | |
724 | CHECK_OFFSET(guest_es_ar_bytes, 880); | |
725 | CHECK_OFFSET(guest_cs_ar_bytes, 884); | |
726 | CHECK_OFFSET(guest_ss_ar_bytes, 888); | |
727 | CHECK_OFFSET(guest_ds_ar_bytes, 892); | |
728 | CHECK_OFFSET(guest_fs_ar_bytes, 896); | |
729 | CHECK_OFFSET(guest_gs_ar_bytes, 900); | |
730 | CHECK_OFFSET(guest_ldtr_ar_bytes, 904); | |
731 | CHECK_OFFSET(guest_tr_ar_bytes, 908); | |
732 | CHECK_OFFSET(guest_interruptibility_info, 912); | |
733 | CHECK_OFFSET(guest_activity_state, 916); | |
734 | CHECK_OFFSET(guest_sysenter_cs, 920); | |
735 | CHECK_OFFSET(host_ia32_sysenter_cs, 924); | |
736 | CHECK_OFFSET(vmx_preemption_timer_value, 928); | |
737 | CHECK_OFFSET(virtual_processor_id, 960); | |
738 | CHECK_OFFSET(posted_intr_nv, 962); | |
739 | CHECK_OFFSET(guest_es_selector, 964); | |
740 | CHECK_OFFSET(guest_cs_selector, 966); | |
741 | CHECK_OFFSET(guest_ss_selector, 968); | |
742 | CHECK_OFFSET(guest_ds_selector, 970); | |
743 | CHECK_OFFSET(guest_fs_selector, 972); | |
744 | CHECK_OFFSET(guest_gs_selector, 974); | |
745 | CHECK_OFFSET(guest_ldtr_selector, 976); | |
746 | CHECK_OFFSET(guest_tr_selector, 978); | |
747 | CHECK_OFFSET(guest_intr_status, 980); | |
748 | CHECK_OFFSET(host_es_selector, 982); | |
749 | CHECK_OFFSET(host_cs_selector, 984); | |
750 | CHECK_OFFSET(host_ss_selector, 986); | |
751 | CHECK_OFFSET(host_ds_selector, 988); | |
752 | CHECK_OFFSET(host_fs_selector, 990); | |
753 | CHECK_OFFSET(host_gs_selector, 992); | |
754 | CHECK_OFFSET(host_tr_selector, 994); | |
755 | CHECK_OFFSET(guest_pml_index, 996); | |
756 | } | |
757 | ||
a9d30f33 NHE |
758 | /* |
759 | * VMCS12_REVISION is an arbitrary id that should be changed if the content or | |
760 | * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and | |
761 | * VMPTRLD verifies that the VMCS region that L1 is loading contains this id. | |
b348e793 JM |
762 | * |
763 | * IMPORTANT: Changing this value will break save/restore compatibility with | |
764 | * older kvm releases. | |
a9d30f33 NHE |
765 | */ |
766 | #define VMCS12_REVISION 0x11e57ed0 | |
767 | ||
768 | /* | |
769 | * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region | |
770 | * and any VMCS region. Although only sizeof(struct vmcs12) are used by the | |
771 | * current implementation, 4K are reserved to avoid future complications. | |
772 | */ | |
773 | #define VMCS12_SIZE 0x1000 | |
774 | ||
5b15706d JM |
775 | /* |
776 | * VMCS12_MAX_FIELD_INDEX is the highest index value used in any | |
777 | * supported VMCS12 field encoding. | |
778 | */ | |
779 | #define VMCS12_MAX_FIELD_INDEX 0x17 | |
780 | ||
6677f3da PB |
781 | struct nested_vmx_msrs { |
782 | /* | |
783 | * We only store the "true" versions of the VMX capability MSRs. We | |
784 | * generate the "non-true" versions by setting the must-be-1 bits | |
785 | * according to the SDM. | |
786 | */ | |
787 | u32 procbased_ctls_low; | |
788 | u32 procbased_ctls_high; | |
789 | u32 secondary_ctls_low; | |
790 | u32 secondary_ctls_high; | |
791 | u32 pinbased_ctls_low; | |
792 | u32 pinbased_ctls_high; | |
793 | u32 exit_ctls_low; | |
794 | u32 exit_ctls_high; | |
795 | u32 entry_ctls_low; | |
796 | u32 entry_ctls_high; | |
797 | u32 misc_low; | |
798 | u32 misc_high; | |
799 | u32 ept_caps; | |
800 | u32 vpid_caps; | |
801 | u64 basic; | |
802 | u64 cr0_fixed0; | |
803 | u64 cr0_fixed1; | |
804 | u64 cr4_fixed0; | |
805 | u64 cr4_fixed1; | |
806 | u64 vmcs_enum; | |
807 | u64 vmfunc_controls; | |
808 | }; | |
809 | ||
ec378aee NHE |
810 | /* |
811 | * The nested_vmx structure is part of vcpu_vmx, and holds information we need | |
812 | * for correct emulation of VMX (i.e., nested VMX) on this vcpu. | |
813 | */ | |
814 | struct nested_vmx { | |
815 | /* Has the level1 guest done vmxon? */ | |
816 | bool vmxon; | |
3573e22c | 817 | gpa_t vmxon_ptr; |
c5f983f6 | 818 | bool pml_full; |
a9d30f33 NHE |
819 | |
820 | /* The guest-physical address of the current VMCS L1 keeps for L2 */ | |
821 | gpa_t current_vmptr; | |
4f2777bc DM |
822 | /* |
823 | * Cache of the guest's VMCS, existing outside of guest memory. | |
824 | * Loaded from guest memory during VMPTRLD. Flushed to guest | |
8ca44e88 | 825 | * memory during VMCLEAR and VMPTRLD. |
4f2777bc DM |
826 | */ |
827 | struct vmcs12 *cached_vmcs12; | |
61ada748 LA |
828 | /* |
829 | * Cache of the guest's shadow VMCS, existing outside of guest | |
830 | * memory. Loaded from guest memory during VM entry. Flushed | |
831 | * to guest memory during VM exit. | |
832 | */ | |
833 | struct vmcs12 *cached_shadow_vmcs12; | |
012f83cb | 834 | /* |
945679e3 VK |
835 | * Indicates if the shadow vmcs or enlightened vmcs must be updated |
836 | * with the data held by struct vmcs12. | |
012f83cb | 837 | */ |
945679e3 | 838 | bool need_vmcs12_sync; |
74a497fa | 839 | bool dirty_vmcs12; |
ff2f6fe9 | 840 | |
9d6105b2 SC |
841 | /* |
842 | * vmcs02 has been initialized, i.e. state that is constant for | |
843 | * vmcs02 has been written to the backing VMCS. Initialization | |
844 | * is delayed until L1 actually attempts to run a nested VM. | |
845 | */ | |
846 | bool vmcs02_initialized; | |
847 | ||
8d860bbe JM |
848 | bool change_vmcs01_virtual_apic_mode; |
849 | ||
57b119da VK |
850 | /* |
851 | * Enlightened VMCS has been enabled. It does not mean that L1 has to | |
852 | * use it. However, VMX features available to L1 will be limited based | |
853 | * on what the enlightened VMCS supports. | |
854 | */ | |
855 | bool enlightened_vmcs_enabled; | |
856 | ||
644d711a NHE |
857 | /* L2 must run next, and mustn't decide to exit to L1. */ |
858 | bool nested_run_pending; | |
de3a0021 JM |
859 | |
860 | struct loaded_vmcs vmcs02; | |
861 | ||
fe3ef05c | 862 | /* |
de3a0021 JM |
863 | * Guest pages referred to in the vmcs02 with host-physical |
864 | * pointers, so we must keep them pinned while L2 runs. | |
fe3ef05c NHE |
865 | */ |
866 | struct page *apic_access_page; | |
a7c0b07d | 867 | struct page *virtual_apic_page; |
705699a1 WV |
868 | struct page *pi_desc_page; |
869 | struct pi_desc *pi_desc; | |
870 | bool pi_pending; | |
871 | u16 posted_intr_nv; | |
f4124500 JK |
872 | |
873 | struct hrtimer preemption_timer; | |
874 | bool preemption_timer_expired; | |
2996fca0 JK |
875 | |
876 | /* to migrate it to L2 if VM_ENTRY_LOAD_DEBUG_CONTROLS is off */ | |
877 | u64 vmcs01_debugctl; | |
62cf9bd8 | 878 | u64 vmcs01_guest_bndcfgs; |
b9c237bb | 879 | |
5c614b35 WL |
880 | u16 vpid02; |
881 | u16 last_vpid; | |
882 | ||
6677f3da | 883 | struct nested_vmx_msrs msrs; |
72e9cbdb LP |
884 | |
885 | /* SMM related state */ | |
886 | struct { | |
887 | /* in VMX operation on SMM entry? */ | |
888 | bool vmxon; | |
889 | /* in guest mode on SMM entry? */ | |
890 | bool guest_mode; | |
891 | } smm; | |
945679e3 | 892 | |
b8bbab92 VK |
893 | gpa_t hv_evmcs_vmptr; |
894 | struct page *hv_evmcs_page; | |
945679e3 | 895 | struct hv_enlightened_vmcs *hv_evmcs; |
ec378aee NHE |
896 | }; |
897 | ||
01e439be | 898 | #define POSTED_INTR_ON 0 |
ebbfc765 FW |
899 | #define POSTED_INTR_SN 1 |
900 | ||
01e439be YZ |
901 | /* Posted-Interrupt Descriptor */ |
902 | struct pi_desc { | |
903 | u32 pir[8]; /* Posted interrupt requested */ | |
6ef1522f FW |
904 | union { |
905 | struct { | |
906 | /* bit 256 - Outstanding Notification */ | |
907 | u16 on : 1, | |
908 | /* bit 257 - Suppress Notification */ | |
909 | sn : 1, | |
910 | /* bit 271:258 - Reserved */ | |
911 | rsvd_1 : 14; | |
912 | /* bit 279:272 - Notification Vector */ | |
913 | u8 nv; | |
914 | /* bit 287:280 - Reserved */ | |
915 | u8 rsvd_2; | |
916 | /* bit 319:288 - Notification Destination */ | |
917 | u32 ndst; | |
918 | }; | |
919 | u64 control; | |
920 | }; | |
921 | u32 rsvd[6]; | |
01e439be YZ |
922 | } __aligned(64); |
923 | ||
a20ed54d YZ |
924 | static bool pi_test_and_set_on(struct pi_desc *pi_desc) |
925 | { | |
926 | return test_and_set_bit(POSTED_INTR_ON, | |
927 | (unsigned long *)&pi_desc->control); | |
928 | } | |
929 | ||
930 | static bool pi_test_and_clear_on(struct pi_desc *pi_desc) | |
931 | { | |
932 | return test_and_clear_bit(POSTED_INTR_ON, | |
933 | (unsigned long *)&pi_desc->control); | |
934 | } | |
935 | ||
936 | static int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc) | |
937 | { | |
938 | return test_and_set_bit(vector, (unsigned long *)pi_desc->pir); | |
939 | } | |
940 | ||
ebbfc765 FW |
941 | static inline void pi_clear_sn(struct pi_desc *pi_desc) |
942 | { | |
943 | return clear_bit(POSTED_INTR_SN, | |
944 | (unsigned long *)&pi_desc->control); | |
945 | } | |
946 | ||
947 | static inline void pi_set_sn(struct pi_desc *pi_desc) | |
948 | { | |
949 | return set_bit(POSTED_INTR_SN, | |
950 | (unsigned long *)&pi_desc->control); | |
951 | } | |
952 | ||
ad361091 PB |
953 | static inline void pi_clear_on(struct pi_desc *pi_desc) |
954 | { | |
955 | clear_bit(POSTED_INTR_ON, | |
956 | (unsigned long *)&pi_desc->control); | |
957 | } | |
958 | ||
ebbfc765 FW |
959 | static inline int pi_test_on(struct pi_desc *pi_desc) |
960 | { | |
961 | return test_bit(POSTED_INTR_ON, | |
962 | (unsigned long *)&pi_desc->control); | |
963 | } | |
964 | ||
965 | static inline int pi_test_sn(struct pi_desc *pi_desc) | |
966 | { | |
967 | return test_bit(POSTED_INTR_SN, | |
968 | (unsigned long *)&pi_desc->control); | |
969 | } | |
970 | ||
33966dd6 KRW |
971 | struct vmx_msrs { |
972 | unsigned int nr; | |
973 | struct vmx_msr_entry val[NR_AUTOLOAD_MSRS]; | |
974 | }; | |
975 | ||
a2fa3e9f | 976 | struct vcpu_vmx { |
fb3f0f51 | 977 | struct kvm_vcpu vcpu; |
313dbd49 | 978 | unsigned long host_rsp; |
29bd8a78 | 979 | u8 fail; |
904e14fb | 980 | u8 msr_bitmap_mode; |
51aa01d1 | 981 | u32 exit_intr_info; |
1155f76a | 982 | u32 idt_vectoring_info; |
6de12732 | 983 | ulong rflags; |
26bb0981 | 984 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
985 | int nmsrs; |
986 | int save_nmsrs; | |
a547c6db | 987 | unsigned long host_idt_base; |
a2fa3e9f | 988 | #ifdef CONFIG_X86_64 |
44ea2b17 AK |
989 | u64 msr_host_kernel_gs_base; |
990 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f | 991 | #endif |
15d45071 | 992 | |
28c1c9fa | 993 | u64 arch_capabilities; |
d28b387f | 994 | u64 spec_ctrl; |
28c1c9fa | 995 | |
2961e876 GN |
996 | u32 vm_entry_controls_shadow; |
997 | u32 vm_exit_controls_shadow; | |
80154d77 PB |
998 | u32 secondary_exec_control; |
999 | ||
d462b819 NHE |
1000 | /* |
1001 | * loaded_vmcs points to the VMCS currently used in this vcpu. For a | |
1002 | * non-nested (L1) guest, it always points to vmcs01. For a nested | |
bd9966de SC |
1003 | * guest (L2), it points to a different VMCS. loaded_cpu_state points |
1004 | * to the VMCS whose state is loaded into the CPU registers that only | |
1005 | * need to be switched when transitioning to/from the kernel; a NULL | |
1006 | * value indicates that host state is loaded. | |
d462b819 NHE |
1007 | */ |
1008 | struct loaded_vmcs vmcs01; | |
1009 | struct loaded_vmcs *loaded_vmcs; | |
bd9966de | 1010 | struct loaded_vmcs *loaded_cpu_state; |
d462b819 | 1011 | bool __launched; /* temporary, used in vmx_vcpu_run */ |
61d2ef2c | 1012 | struct msr_autoload { |
33966dd6 KRW |
1013 | struct vmx_msrs guest; |
1014 | struct vmx_msrs host; | |
61d2ef2c | 1015 | } msr_autoload; |
bd9966de | 1016 | |
9c8cba37 | 1017 | struct { |
7ffd92c5 | 1018 | int vm86_active; |
78ac8b47 | 1019 | ulong save_rflags; |
f5f7b2fe AK |
1020 | struct kvm_segment segs[8]; |
1021 | } rmode; | |
1022 | struct { | |
1023 | u32 bitmask; /* 4 bits per segment (1 bit per field) */ | |
7ffd92c5 AK |
1024 | struct kvm_save_segment { |
1025 | u16 selector; | |
1026 | unsigned long base; | |
1027 | u32 limit; | |
1028 | u32 ar; | |
f5f7b2fe | 1029 | } seg[8]; |
2fb92db1 | 1030 | } segment_cache; |
2384d2b3 | 1031 | int vpid; |
04fa4d32 | 1032 | bool emulation_required; |
3b86cd99 | 1033 | |
a0861c02 | 1034 | u32 exit_reason; |
4e47c7a6 | 1035 | |
01e439be YZ |
1036 | /* Posted interrupt descriptor */ |
1037 | struct pi_desc pi_desc; | |
1038 | ||
ec378aee NHE |
1039 | /* Support for a guest hypervisor (nested VMX) */ |
1040 | struct nested_vmx nested; | |
a7653ecd RK |
1041 | |
1042 | /* Dynamic PLE window. */ | |
1043 | int ple_window; | |
1044 | bool ple_window_dirty; | |
843e4330 | 1045 | |
d264ee0c SC |
1046 | bool req_immediate_exit; |
1047 | ||
843e4330 KH |
1048 | /* Support for PML */ |
1049 | #define PML_ENTITY_NUM 512 | |
1050 | struct page *pml_pg; | |
2680d6da | 1051 | |
64672c95 YJ |
1052 | /* apic deadline value in host tsc */ |
1053 | u64 hv_deadline_tsc; | |
1054 | ||
2680d6da | 1055 | u64 current_tsc_ratio; |
1be0e61c | 1056 | |
1be0e61c | 1057 | u32 host_pkru; |
3b84080b | 1058 | |
74c55931 WL |
1059 | unsigned long host_debugctlmsr; |
1060 | ||
37e4c997 HZ |
1061 | /* |
1062 | * Only bits masked by msr_ia32_feature_control_valid_bits can be set in | |
1063 | * msr_ia32_feature_control. FEATURE_CONTROL_LOCKED is always included | |
1064 | * in msr_ia32_feature_control_valid_bits. | |
1065 | */ | |
3b84080b | 1066 | u64 msr_ia32_feature_control; |
37e4c997 | 1067 | u64 msr_ia32_feature_control_valid_bits; |
877ad952 | 1068 | u64 ept_pointer; |
a2fa3e9f GH |
1069 | }; |
1070 | ||
2fb92db1 AK |
1071 | enum segment_cache_field { |
1072 | SEG_FIELD_SEL = 0, | |
1073 | SEG_FIELD_BASE = 1, | |
1074 | SEG_FIELD_LIMIT = 2, | |
1075 | SEG_FIELD_AR = 3, | |
1076 | ||
1077 | SEG_FIELD_NR = 4 | |
1078 | }; | |
1079 | ||
40bbb9d0 SC |
1080 | static inline struct kvm_vmx *to_kvm_vmx(struct kvm *kvm) |
1081 | { | |
1082 | return container_of(kvm, struct kvm_vmx, kvm); | |
1083 | } | |
1084 | ||
a2fa3e9f GH |
1085 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
1086 | { | |
fb3f0f51 | 1087 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
1088 | } |
1089 | ||
efc64404 FW |
1090 | static struct pi_desc *vcpu_to_pi_desc(struct kvm_vcpu *vcpu) |
1091 | { | |
1092 | return &(to_vmx(vcpu)->pi_desc); | |
1093 | } | |
1094 | ||
58e9ffae | 1095 | #define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n))))) |
22bd0358 | 1096 | #define VMCS12_OFFSET(x) offsetof(struct vmcs12, x) |
58e9ffae JM |
1097 | #define FIELD(number, name) [ROL16(number, 6)] = VMCS12_OFFSET(name) |
1098 | #define FIELD64(number, name) \ | |
1099 | FIELD(number, name), \ | |
1100 | [ROL16(number##_HIGH, 6)] = VMCS12_OFFSET(name) + sizeof(u32) | |
22bd0358 | 1101 | |
4607c2d7 | 1102 | |
44900ba6 | 1103 | static u16 shadow_read_only_fields[] = { |
c9e9deae PB |
1104 | #define SHADOW_FIELD_RO(x) x, |
1105 | #include "vmx_shadow_fields.h" | |
4607c2d7 | 1106 | }; |
fe2b201b | 1107 | static int max_shadow_read_only_fields = |
4607c2d7 AG |
1108 | ARRAY_SIZE(shadow_read_only_fields); |
1109 | ||
44900ba6 | 1110 | static u16 shadow_read_write_fields[] = { |
c9e9deae PB |
1111 | #define SHADOW_FIELD_RW(x) x, |
1112 | #include "vmx_shadow_fields.h" | |
4607c2d7 | 1113 | }; |
fe2b201b | 1114 | static int max_shadow_read_write_fields = |
4607c2d7 AG |
1115 | ARRAY_SIZE(shadow_read_write_fields); |
1116 | ||
772e0318 | 1117 | static const unsigned short vmcs_field_to_offset_table[] = { |
22bd0358 | 1118 | FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id), |
705699a1 | 1119 | FIELD(POSTED_INTR_NV, posted_intr_nv), |
22bd0358 NHE |
1120 | FIELD(GUEST_ES_SELECTOR, guest_es_selector), |
1121 | FIELD(GUEST_CS_SELECTOR, guest_cs_selector), | |
1122 | FIELD(GUEST_SS_SELECTOR, guest_ss_selector), | |
1123 | FIELD(GUEST_DS_SELECTOR, guest_ds_selector), | |
1124 | FIELD(GUEST_FS_SELECTOR, guest_fs_selector), | |
1125 | FIELD(GUEST_GS_SELECTOR, guest_gs_selector), | |
1126 | FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector), | |
1127 | FIELD(GUEST_TR_SELECTOR, guest_tr_selector), | |
608406e2 | 1128 | FIELD(GUEST_INTR_STATUS, guest_intr_status), |
c5f983f6 | 1129 | FIELD(GUEST_PML_INDEX, guest_pml_index), |
22bd0358 NHE |
1130 | FIELD(HOST_ES_SELECTOR, host_es_selector), |
1131 | FIELD(HOST_CS_SELECTOR, host_cs_selector), | |
1132 | FIELD(HOST_SS_SELECTOR, host_ss_selector), | |
1133 | FIELD(HOST_DS_SELECTOR, host_ds_selector), | |
1134 | FIELD(HOST_FS_SELECTOR, host_fs_selector), | |
1135 | FIELD(HOST_GS_SELECTOR, host_gs_selector), | |
1136 | FIELD(HOST_TR_SELECTOR, host_tr_selector), | |
1137 | FIELD64(IO_BITMAP_A, io_bitmap_a), | |
1138 | FIELD64(IO_BITMAP_B, io_bitmap_b), | |
1139 | FIELD64(MSR_BITMAP, msr_bitmap), | |
1140 | FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr), | |
1141 | FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr), | |
1142 | FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr), | |
b348e793 | 1143 | FIELD64(PML_ADDRESS, pml_address), |
22bd0358 NHE |
1144 | FIELD64(TSC_OFFSET, tsc_offset), |
1145 | FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr), | |
1146 | FIELD64(APIC_ACCESS_ADDR, apic_access_addr), | |
705699a1 | 1147 | FIELD64(POSTED_INTR_DESC_ADDR, posted_intr_desc_addr), |
27c42a1b | 1148 | FIELD64(VM_FUNCTION_CONTROL, vm_function_control), |
22bd0358 | 1149 | FIELD64(EPT_POINTER, ept_pointer), |
608406e2 WV |
1150 | FIELD64(EOI_EXIT_BITMAP0, eoi_exit_bitmap0), |
1151 | FIELD64(EOI_EXIT_BITMAP1, eoi_exit_bitmap1), | |
1152 | FIELD64(EOI_EXIT_BITMAP2, eoi_exit_bitmap2), | |
1153 | FIELD64(EOI_EXIT_BITMAP3, eoi_exit_bitmap3), | |
41ab9372 | 1154 | FIELD64(EPTP_LIST_ADDRESS, eptp_list_address), |
b348e793 JM |
1155 | FIELD64(VMREAD_BITMAP, vmread_bitmap), |
1156 | FIELD64(VMWRITE_BITMAP, vmwrite_bitmap), | |
81dc01f7 | 1157 | FIELD64(XSS_EXIT_BITMAP, xss_exit_bitmap), |
22bd0358 NHE |
1158 | FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address), |
1159 | FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer), | |
1160 | FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl), | |
1161 | FIELD64(GUEST_IA32_PAT, guest_ia32_pat), | |
1162 | FIELD64(GUEST_IA32_EFER, guest_ia32_efer), | |
1163 | FIELD64(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl), | |
1164 | FIELD64(GUEST_PDPTR0, guest_pdptr0), | |
1165 | FIELD64(GUEST_PDPTR1, guest_pdptr1), | |
1166 | FIELD64(GUEST_PDPTR2, guest_pdptr2), | |
1167 | FIELD64(GUEST_PDPTR3, guest_pdptr3), | |
36be0b9d | 1168 | FIELD64(GUEST_BNDCFGS, guest_bndcfgs), |
22bd0358 NHE |
1169 | FIELD64(HOST_IA32_PAT, host_ia32_pat), |
1170 | FIELD64(HOST_IA32_EFER, host_ia32_efer), | |
1171 | FIELD64(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl), | |
1172 | FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control), | |
1173 | FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control), | |
1174 | FIELD(EXCEPTION_BITMAP, exception_bitmap), | |
1175 | FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask), | |
1176 | FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match), | |
1177 | FIELD(CR3_TARGET_COUNT, cr3_target_count), | |
1178 | FIELD(VM_EXIT_CONTROLS, vm_exit_controls), | |
1179 | FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count), | |
1180 | FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count), | |
1181 | FIELD(VM_ENTRY_CONTROLS, vm_entry_controls), | |
1182 | FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count), | |
1183 | FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field), | |
1184 | FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code), | |
1185 | FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len), | |
1186 | FIELD(TPR_THRESHOLD, tpr_threshold), | |
1187 | FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control), | |
1188 | FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error), | |
1189 | FIELD(VM_EXIT_REASON, vm_exit_reason), | |
1190 | FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info), | |
1191 | FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code), | |
1192 | FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field), | |
1193 | FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code), | |
1194 | FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len), | |
1195 | FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info), | |
1196 | FIELD(GUEST_ES_LIMIT, guest_es_limit), | |
1197 | FIELD(GUEST_CS_LIMIT, guest_cs_limit), | |
1198 | FIELD(GUEST_SS_LIMIT, guest_ss_limit), | |
1199 | FIELD(GUEST_DS_LIMIT, guest_ds_limit), | |
1200 | FIELD(GUEST_FS_LIMIT, guest_fs_limit), | |
1201 | FIELD(GUEST_GS_LIMIT, guest_gs_limit), | |
1202 | FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit), | |
1203 | FIELD(GUEST_TR_LIMIT, guest_tr_limit), | |
1204 | FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit), | |
1205 | FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit), | |
1206 | FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes), | |
1207 | FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes), | |
1208 | FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes), | |
1209 | FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes), | |
1210 | FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes), | |
1211 | FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes), | |
1212 | FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes), | |
1213 | FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes), | |
1214 | FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info), | |
1215 | FIELD(GUEST_ACTIVITY_STATE, guest_activity_state), | |
1216 | FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs), | |
1217 | FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs), | |
0238ea91 | 1218 | FIELD(VMX_PREEMPTION_TIMER_VALUE, vmx_preemption_timer_value), |
22bd0358 NHE |
1219 | FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask), |
1220 | FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask), | |
1221 | FIELD(CR0_READ_SHADOW, cr0_read_shadow), | |
1222 | FIELD(CR4_READ_SHADOW, cr4_read_shadow), | |
1223 | FIELD(CR3_TARGET_VALUE0, cr3_target_value0), | |
1224 | FIELD(CR3_TARGET_VALUE1, cr3_target_value1), | |
1225 | FIELD(CR3_TARGET_VALUE2, cr3_target_value2), | |
1226 | FIELD(CR3_TARGET_VALUE3, cr3_target_value3), | |
1227 | FIELD(EXIT_QUALIFICATION, exit_qualification), | |
1228 | FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address), | |
1229 | FIELD(GUEST_CR0, guest_cr0), | |
1230 | FIELD(GUEST_CR3, guest_cr3), | |
1231 | FIELD(GUEST_CR4, guest_cr4), | |
1232 | FIELD(GUEST_ES_BASE, guest_es_base), | |
1233 | FIELD(GUEST_CS_BASE, guest_cs_base), | |
1234 | FIELD(GUEST_SS_BASE, guest_ss_base), | |
1235 | FIELD(GUEST_DS_BASE, guest_ds_base), | |
1236 | FIELD(GUEST_FS_BASE, guest_fs_base), | |
1237 | FIELD(GUEST_GS_BASE, guest_gs_base), | |
1238 | FIELD(GUEST_LDTR_BASE, guest_ldtr_base), | |
1239 | FIELD(GUEST_TR_BASE, guest_tr_base), | |
1240 | FIELD(GUEST_GDTR_BASE, guest_gdtr_base), | |
1241 | FIELD(GUEST_IDTR_BASE, guest_idtr_base), | |
1242 | FIELD(GUEST_DR7, guest_dr7), | |
1243 | FIELD(GUEST_RSP, guest_rsp), | |
1244 | FIELD(GUEST_RIP, guest_rip), | |
1245 | FIELD(GUEST_RFLAGS, guest_rflags), | |
1246 | FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions), | |
1247 | FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp), | |
1248 | FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip), | |
1249 | FIELD(HOST_CR0, host_cr0), | |
1250 | FIELD(HOST_CR3, host_cr3), | |
1251 | FIELD(HOST_CR4, host_cr4), | |
1252 | FIELD(HOST_FS_BASE, host_fs_base), | |
1253 | FIELD(HOST_GS_BASE, host_gs_base), | |
1254 | FIELD(HOST_TR_BASE, host_tr_base), | |
1255 | FIELD(HOST_GDTR_BASE, host_gdtr_base), | |
1256 | FIELD(HOST_IDTR_BASE, host_idtr_base), | |
1257 | FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp), | |
1258 | FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip), | |
1259 | FIELD(HOST_RSP, host_rsp), | |
1260 | FIELD(HOST_RIP, host_rip), | |
1261 | }; | |
22bd0358 NHE |
1262 | |
1263 | static inline short vmcs_field_to_offset(unsigned long field) | |
1264 | { | |
085331df DW |
1265 | const size_t size = ARRAY_SIZE(vmcs_field_to_offset_table); |
1266 | unsigned short offset; | |
58e9ffae JM |
1267 | unsigned index; |
1268 | ||
1269 | if (field >> 15) | |
1270 | return -ENOENT; | |
a2ae9df7 | 1271 | |
58e9ffae | 1272 | index = ROL16(field, 6); |
15303ba5 | 1273 | if (index >= size) |
75f139aa AH |
1274 | return -ENOENT; |
1275 | ||
15303ba5 LT |
1276 | index = array_index_nospec(index, size); |
1277 | offset = vmcs_field_to_offset_table[index]; | |
085331df | 1278 | if (offset == 0) |
a2ae9df7 | 1279 | return -ENOENT; |
085331df | 1280 | return offset; |
22bd0358 NHE |
1281 | } |
1282 | ||
a9d30f33 NHE |
1283 | static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu) |
1284 | { | |
4f2777bc | 1285 | return to_vmx(vcpu)->nested.cached_vmcs12; |
a9d30f33 NHE |
1286 | } |
1287 | ||
61ada748 LA |
1288 | static inline struct vmcs12 *get_shadow_vmcs12(struct kvm_vcpu *vcpu) |
1289 | { | |
1290 | return to_vmx(vcpu)->nested.cached_shadow_vmcs12; | |
1291 | } | |
1292 | ||
995f00a6 | 1293 | static bool nested_ept_ad_enabled(struct kvm_vcpu *vcpu); |
bfd0a56b | 1294 | static unsigned long nested_ept_get_cr3(struct kvm_vcpu *vcpu); |
995f00a6 | 1295 | static u64 construct_eptp(struct kvm_vcpu *vcpu, unsigned long root_hpa); |
f53cd63c | 1296 | static bool vmx_xsaves_supported(void); |
b246dd5d OW |
1297 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
1298 | struct kvm_segment *var, int seg); | |
1299 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
1300 | struct kvm_segment *var, int seg); | |
d99e4152 GN |
1301 | static bool guest_state_valid(struct kvm_vcpu *vcpu); |
1302 | static u32 vmx_segment_access_rights(struct kvm_segment *var); | |
16f5b903 | 1303 | static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx); |
b96fb439 PB |
1304 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu); |
1305 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked); | |
1306 | static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12, | |
1307 | u16 error_code); | |
904e14fb | 1308 | static void vmx_update_msr_bitmap(struct kvm_vcpu *vcpu); |
15d45071 AR |
1309 | static void __always_inline vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, |
1310 | u32 msr, int type); | |
75880a01 | 1311 | |
6aa8b732 AK |
1312 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
1313 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
d462b819 NHE |
1314 | /* |
1315 | * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed | |
1316 | * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it. | |
1317 | */ | |
1318 | static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu); | |
6aa8b732 | 1319 | |
bf9f6ac8 FW |
1320 | /* |
1321 | * We maintian a per-CPU linked-list of vCPU, so in wakeup_handler() we | |
1322 | * can find which vCPU should be waken up. | |
1323 | */ | |
1324 | static DEFINE_PER_CPU(struct list_head, blocked_vcpu_on_cpu); | |
1325 | static DEFINE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock); | |
1326 | ||
23611332 | 1327 | enum { |
23611332 RK |
1328 | VMX_VMREAD_BITMAP, |
1329 | VMX_VMWRITE_BITMAP, | |
1330 | VMX_BITMAP_NR | |
1331 | }; | |
1332 | ||
1333 | static unsigned long *vmx_bitmap[VMX_BITMAP_NR]; | |
1334 | ||
23611332 RK |
1335 | #define vmx_vmread_bitmap (vmx_bitmap[VMX_VMREAD_BITMAP]) |
1336 | #define vmx_vmwrite_bitmap (vmx_bitmap[VMX_VMWRITE_BITMAP]) | |
fdef3ad1 | 1337 | |
110312c8 | 1338 | static bool cpu_has_load_ia32_efer; |
8bf00a52 | 1339 | static bool cpu_has_load_perf_global_ctrl; |
110312c8 | 1340 | |
2384d2b3 SY |
1341 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
1342 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
1343 | ||
1c3d14fe | 1344 | static struct vmcs_config { |
6aa8b732 AK |
1345 | int size; |
1346 | int order; | |
9ac7e3e8 | 1347 | u32 basic_cap; |
6aa8b732 | 1348 | u32 revision_id; |
1c3d14fe YS |
1349 | u32 pin_based_exec_ctrl; |
1350 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 1351 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
1352 | u32 vmexit_ctrl; |
1353 | u32 vmentry_ctrl; | |
1389309c | 1354 | struct nested_vmx_msrs nested; |
1c3d14fe | 1355 | } vmcs_config; |
6aa8b732 | 1356 | |
efff9e53 | 1357 | static struct vmx_capability { |
d56f546d SY |
1358 | u32 ept; |
1359 | u32 vpid; | |
1360 | } vmx_capability; | |
1361 | ||
6aa8b732 AK |
1362 | #define VMX_SEGMENT_FIELD(seg) \ |
1363 | [VCPU_SREG_##seg] = { \ | |
1364 | .selector = GUEST_##seg##_SELECTOR, \ | |
1365 | .base = GUEST_##seg##_BASE, \ | |
1366 | .limit = GUEST_##seg##_LIMIT, \ | |
1367 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
1368 | } | |
1369 | ||
772e0318 | 1370 | static const struct kvm_vmx_segment_field { |
6aa8b732 AK |
1371 | unsigned selector; |
1372 | unsigned base; | |
1373 | unsigned limit; | |
1374 | unsigned ar_bytes; | |
1375 | } kvm_vmx_segment_fields[] = { | |
1376 | VMX_SEGMENT_FIELD(CS), | |
1377 | VMX_SEGMENT_FIELD(DS), | |
1378 | VMX_SEGMENT_FIELD(ES), | |
1379 | VMX_SEGMENT_FIELD(FS), | |
1380 | VMX_SEGMENT_FIELD(GS), | |
1381 | VMX_SEGMENT_FIELD(SS), | |
1382 | VMX_SEGMENT_FIELD(TR), | |
1383 | VMX_SEGMENT_FIELD(LDTR), | |
1384 | }; | |
1385 | ||
26bb0981 AK |
1386 | static u64 host_efer; |
1387 | ||
6de4f3ad AK |
1388 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
1389 | ||
4d56c8a7 | 1390 | /* |
8c06585d | 1391 | * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it |
4d56c8a7 AK |
1392 | * away by decrementing the array size. |
1393 | */ | |
6aa8b732 | 1394 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 1395 | #ifdef CONFIG_X86_64 |
44ea2b17 | 1396 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 | 1397 | #endif |
8c06585d | 1398 | MSR_EFER, MSR_TSC_AUX, MSR_STAR, |
6aa8b732 | 1399 | }; |
6aa8b732 | 1400 | |
773e8a04 VK |
1401 | DEFINE_STATIC_KEY_FALSE(enable_evmcs); |
1402 | ||
1403 | #define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs)) | |
1404 | ||
1405 | #define KVM_EVMCS_VERSION 1 | |
1406 | ||
5d7a6443 VK |
1407 | /* |
1408 | * Enlightened VMCSv1 doesn't support these: | |
1409 | * | |
1410 | * POSTED_INTR_NV = 0x00000002, | |
1411 | * GUEST_INTR_STATUS = 0x00000810, | |
1412 | * APIC_ACCESS_ADDR = 0x00002014, | |
1413 | * POSTED_INTR_DESC_ADDR = 0x00002016, | |
1414 | * EOI_EXIT_BITMAP0 = 0x0000201c, | |
1415 | * EOI_EXIT_BITMAP1 = 0x0000201e, | |
1416 | * EOI_EXIT_BITMAP2 = 0x00002020, | |
1417 | * EOI_EXIT_BITMAP3 = 0x00002022, | |
1418 | * GUEST_PML_INDEX = 0x00000812, | |
1419 | * PML_ADDRESS = 0x0000200e, | |
1420 | * VM_FUNCTION_CONTROL = 0x00002018, | |
1421 | * EPTP_LIST_ADDRESS = 0x00002024, | |
1422 | * VMREAD_BITMAP = 0x00002026, | |
1423 | * VMWRITE_BITMAP = 0x00002028, | |
1424 | * | |
1425 | * TSC_MULTIPLIER = 0x00002032, | |
1426 | * PLE_GAP = 0x00004020, | |
1427 | * PLE_WINDOW = 0x00004022, | |
1428 | * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E, | |
1429 | * GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808, | |
1430 | * HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04, | |
1431 | * | |
1432 | * Currently unsupported in KVM: | |
1433 | * GUEST_IA32_RTIT_CTL = 0x00002814, | |
1434 | */ | |
1435 | #define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \ | |
1436 | PIN_BASED_VMX_PREEMPTION_TIMER) | |
1437 | #define EVMCS1_UNSUPPORTED_2NDEXEC \ | |
1438 | (SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | \ | |
1439 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | \ | |
1440 | SECONDARY_EXEC_APIC_REGISTER_VIRT | \ | |
1441 | SECONDARY_EXEC_ENABLE_PML | \ | |
1442 | SECONDARY_EXEC_ENABLE_VMFUNC | \ | |
1443 | SECONDARY_EXEC_SHADOW_VMCS | \ | |
1444 | SECONDARY_EXEC_TSC_SCALING | \ | |
1445 | SECONDARY_EXEC_PAUSE_LOOP_EXITING) | |
1446 | #define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) | |
1447 | #define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) | |
1448 | #define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING) | |
1449 | ||
773e8a04 VK |
1450 | #if IS_ENABLED(CONFIG_HYPERV) |
1451 | static bool __read_mostly enlightened_vmcs = true; | |
1452 | module_param(enlightened_vmcs, bool, 0444); | |
1453 | ||
1454 | static inline void evmcs_write64(unsigned long field, u64 value) | |
1455 | { | |
1456 | u16 clean_field; | |
1457 | int offset = get_evmcs_offset(field, &clean_field); | |
1458 | ||
1459 | if (offset < 0) | |
1460 | return; | |
1461 | ||
1462 | *(u64 *)((char *)current_evmcs + offset) = value; | |
1463 | ||
1464 | current_evmcs->hv_clean_fields &= ~clean_field; | |
1465 | } | |
1466 | ||
1467 | static inline void evmcs_write32(unsigned long field, u32 value) | |
1468 | { | |
1469 | u16 clean_field; | |
1470 | int offset = get_evmcs_offset(field, &clean_field); | |
1471 | ||
1472 | if (offset < 0) | |
1473 | return; | |
1474 | ||
1475 | *(u32 *)((char *)current_evmcs + offset) = value; | |
1476 | current_evmcs->hv_clean_fields &= ~clean_field; | |
1477 | } | |
1478 | ||
1479 | static inline void evmcs_write16(unsigned long field, u16 value) | |
1480 | { | |
1481 | u16 clean_field; | |
1482 | int offset = get_evmcs_offset(field, &clean_field); | |
1483 | ||
1484 | if (offset < 0) | |
1485 | return; | |
1486 | ||
1487 | *(u16 *)((char *)current_evmcs + offset) = value; | |
1488 | current_evmcs->hv_clean_fields &= ~clean_field; | |
1489 | } | |
1490 | ||
1491 | static inline u64 evmcs_read64(unsigned long field) | |
1492 | { | |
1493 | int offset = get_evmcs_offset(field, NULL); | |
1494 | ||
1495 | if (offset < 0) | |
1496 | return 0; | |
1497 | ||
1498 | return *(u64 *)((char *)current_evmcs + offset); | |
1499 | } | |
1500 | ||
1501 | static inline u32 evmcs_read32(unsigned long field) | |
1502 | { | |
1503 | int offset = get_evmcs_offset(field, NULL); | |
1504 | ||
1505 | if (offset < 0) | |
1506 | return 0; | |
1507 | ||
1508 | return *(u32 *)((char *)current_evmcs + offset); | |
1509 | } | |
1510 | ||
1511 | static inline u16 evmcs_read16(unsigned long field) | |
1512 | { | |
1513 | int offset = get_evmcs_offset(field, NULL); | |
1514 | ||
1515 | if (offset < 0) | |
1516 | return 0; | |
1517 | ||
1518 | return *(u16 *)((char *)current_evmcs + offset); | |
1519 | } | |
1520 | ||
ceef7d10 VK |
1521 | static inline void evmcs_touch_msr_bitmap(void) |
1522 | { | |
1523 | if (unlikely(!current_evmcs)) | |
1524 | return; | |
1525 | ||
1526 | if (current_evmcs->hv_enlightenments_control.msr_bitmap) | |
1527 | current_evmcs->hv_clean_fields &= | |
1528 | ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP; | |
1529 | } | |
1530 | ||
773e8a04 VK |
1531 | static void evmcs_load(u64 phys_addr) |
1532 | { | |
1533 | struct hv_vp_assist_page *vp_ap = | |
1534 | hv_get_vp_assist_page(smp_processor_id()); | |
1535 | ||
1536 | vp_ap->current_nested_vmcs = phys_addr; | |
1537 | vp_ap->enlighten_vmentry = 1; | |
1538 | } | |
1539 | ||
1540 | static void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf) | |
1541 | { | |
5d7a6443 VK |
1542 | vmcs_conf->pin_based_exec_ctrl &= ~EVMCS1_UNSUPPORTED_PINCTRL; |
1543 | vmcs_conf->cpu_based_2nd_exec_ctrl &= ~EVMCS1_UNSUPPORTED_2NDEXEC; | |
773e8a04 | 1544 | |
5d7a6443 VK |
1545 | vmcs_conf->vmexit_ctrl &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL; |
1546 | vmcs_conf->vmentry_ctrl &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL; | |
773e8a04 | 1547 | |
773e8a04 | 1548 | } |
877ad952 TL |
1549 | |
1550 | /* check_ept_pointer() should be under protection of ept_pointer_lock. */ | |
1551 | static void check_ept_pointer_match(struct kvm *kvm) | |
1552 | { | |
1553 | struct kvm_vcpu *vcpu; | |
1554 | u64 tmp_eptp = INVALID_PAGE; | |
1555 | int i; | |
1556 | ||
1557 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1558 | if (!VALID_PAGE(tmp_eptp)) { | |
1559 | tmp_eptp = to_vmx(vcpu)->ept_pointer; | |
1560 | } else if (tmp_eptp != to_vmx(vcpu)->ept_pointer) { | |
1561 | to_kvm_vmx(kvm)->ept_pointers_match | |
1562 | = EPT_POINTERS_MISMATCH; | |
1563 | return; | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | to_kvm_vmx(kvm)->ept_pointers_match = EPT_POINTERS_MATCH; | |
1568 | } | |
1569 | ||
1570 | static int vmx_hv_remote_flush_tlb(struct kvm *kvm) | |
1571 | { | |
a5c214da LT |
1572 | struct kvm_vcpu *vcpu; |
1573 | int ret = -ENOTSUPP, i; | |
877ad952 TL |
1574 | |
1575 | spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock); | |
1576 | ||
1577 | if (to_kvm_vmx(kvm)->ept_pointers_match == EPT_POINTERS_CHECK) | |
1578 | check_ept_pointer_match(kvm); | |
1579 | ||
1580 | if (to_kvm_vmx(kvm)->ept_pointers_match != EPT_POINTERS_MATCH) { | |
a5c214da LT |
1581 | kvm_for_each_vcpu(i, vcpu, kvm) |
1582 | ret |= hyperv_flush_guest_mapping( | |
1583 | to_vmx(kvm_get_vcpu(kvm, i))->ept_pointer); | |
1584 | } else { | |
1585 | ret = hyperv_flush_guest_mapping( | |
1586 | to_vmx(kvm_get_vcpu(kvm, 0))->ept_pointer); | |
877ad952 TL |
1587 | } |
1588 | ||
877ad952 TL |
1589 | spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock); |
1590 | return ret; | |
1591 | } | |
773e8a04 VK |
1592 | #else /* !IS_ENABLED(CONFIG_HYPERV) */ |
1593 | static inline void evmcs_write64(unsigned long field, u64 value) {} | |
1594 | static inline void evmcs_write32(unsigned long field, u32 value) {} | |
1595 | static inline void evmcs_write16(unsigned long field, u16 value) {} | |
1596 | static inline u64 evmcs_read64(unsigned long field) { return 0; } | |
1597 | static inline u32 evmcs_read32(unsigned long field) { return 0; } | |
1598 | static inline u16 evmcs_read16(unsigned long field) { return 0; } | |
1599 | static inline void evmcs_load(u64 phys_addr) {} | |
1600 | static inline void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf) {} | |
ceef7d10 | 1601 | static inline void evmcs_touch_msr_bitmap(void) {} |
773e8a04 VK |
1602 | #endif /* IS_ENABLED(CONFIG_HYPERV) */ |
1603 | ||
57b119da VK |
1604 | static int nested_enable_evmcs(struct kvm_vcpu *vcpu, |
1605 | uint16_t *vmcs_version) | |
1606 | { | |
1607 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
1608 | ||
1609 | /* We don't support disabling the feature for simplicity. */ | |
1610 | if (vmx->nested.enlightened_vmcs_enabled) | |
1611 | return 0; | |
1612 | ||
1613 | vmx->nested.enlightened_vmcs_enabled = true; | |
1614 | ||
1615 | /* | |
1616 | * vmcs_version represents the range of supported Enlightened VMCS | |
1617 | * versions: lower 8 bits is the minimal version, higher 8 bits is the | |
1618 | * maximum supported version. KVM supports versions from 1 to | |
1619 | * KVM_EVMCS_VERSION. | |
1620 | */ | |
8cab6507 VK |
1621 | if (vmcs_version) |
1622 | *vmcs_version = (KVM_EVMCS_VERSION << 8) | 1; | |
57b119da VK |
1623 | |
1624 | vmx->nested.msrs.pinbased_ctls_high &= ~EVMCS1_UNSUPPORTED_PINCTRL; | |
1625 | vmx->nested.msrs.entry_ctls_high &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL; | |
1626 | vmx->nested.msrs.exit_ctls_high &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL; | |
1627 | vmx->nested.msrs.secondary_ctls_high &= ~EVMCS1_UNSUPPORTED_2NDEXEC; | |
1628 | vmx->nested.msrs.vmfunc_controls &= ~EVMCS1_UNSUPPORTED_VMFUNC; | |
1629 | ||
1630 | return 0; | |
1631 | } | |
1632 | ||
5bb16016 | 1633 | static inline bool is_exception_n(u32 intr_info, u8 vector) |
6aa8b732 AK |
1634 | { |
1635 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
1636 | INTR_INFO_VALID_MASK)) == | |
5bb16016 JK |
1637 | (INTR_TYPE_HARD_EXCEPTION | vector | INTR_INFO_VALID_MASK); |
1638 | } | |
1639 | ||
6f05485d JK |
1640 | static inline bool is_debug(u32 intr_info) |
1641 | { | |
1642 | return is_exception_n(intr_info, DB_VECTOR); | |
1643 | } | |
1644 | ||
1645 | static inline bool is_breakpoint(u32 intr_info) | |
1646 | { | |
1647 | return is_exception_n(intr_info, BP_VECTOR); | |
1648 | } | |
1649 | ||
5bb16016 JK |
1650 | static inline bool is_page_fault(u32 intr_info) |
1651 | { | |
1652 | return is_exception_n(intr_info, PF_VECTOR); | |
6aa8b732 AK |
1653 | } |
1654 | ||
31299944 | 1655 | static inline bool is_invalid_opcode(u32 intr_info) |
7aa81cc0 | 1656 | { |
5bb16016 | 1657 | return is_exception_n(intr_info, UD_VECTOR); |
7aa81cc0 AL |
1658 | } |
1659 | ||
9e869480 LA |
1660 | static inline bool is_gp_fault(u32 intr_info) |
1661 | { | |
1662 | return is_exception_n(intr_info, GP_VECTOR); | |
1663 | } | |
1664 | ||
31299944 | 1665 | static inline bool is_machine_check(u32 intr_info) |
a0861c02 AK |
1666 | { |
1667 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
1668 | INTR_INFO_VALID_MASK)) == | |
1669 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
1670 | } | |
1671 | ||
32d43cd3 LT |
1672 | /* Undocumented: icebp/int1 */ |
1673 | static inline bool is_icebp(u32 intr_info) | |
1674 | { | |
1675 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
1676 | == (INTR_TYPE_PRIV_SW_EXCEPTION | INTR_INFO_VALID_MASK); | |
1677 | } | |
1678 | ||
31299944 | 1679 | static inline bool cpu_has_vmx_msr_bitmap(void) |
25c5f225 | 1680 | { |
04547156 | 1681 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
1682 | } |
1683 | ||
31299944 | 1684 | static inline bool cpu_has_vmx_tpr_shadow(void) |
6e5d865c | 1685 | { |
04547156 | 1686 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
1687 | } |
1688 | ||
35754c98 | 1689 | static inline bool cpu_need_tpr_shadow(struct kvm_vcpu *vcpu) |
6e5d865c | 1690 | { |
35754c98 | 1691 | return cpu_has_vmx_tpr_shadow() && lapic_in_kernel(vcpu); |
6e5d865c YS |
1692 | } |
1693 | ||
31299944 | 1694 | static inline bool cpu_has_secondary_exec_ctrls(void) |
f78e0e2e | 1695 | { |
04547156 SY |
1696 | return vmcs_config.cpu_based_exec_ctrl & |
1697 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
1698 | } |
1699 | ||
774ead3a | 1700 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 1701 | { |
04547156 SY |
1702 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
1703 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
1704 | } | |
1705 | ||
8d14695f YZ |
1706 | static inline bool cpu_has_vmx_virtualize_x2apic_mode(void) |
1707 | { | |
1708 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1709 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
1710 | } | |
1711 | ||
83d4c286 YZ |
1712 | static inline bool cpu_has_vmx_apic_register_virt(void) |
1713 | { | |
1714 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1715 | SECONDARY_EXEC_APIC_REGISTER_VIRT; | |
1716 | } | |
1717 | ||
c7c9c56c YZ |
1718 | static inline bool cpu_has_vmx_virtual_intr_delivery(void) |
1719 | { | |
1720 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1721 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; | |
1722 | } | |
1723 | ||
0b665d30 SC |
1724 | static inline bool cpu_has_vmx_encls_vmexit(void) |
1725 | { | |
1726 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1727 | SECONDARY_EXEC_ENCLS_EXITING; | |
1728 | } | |
1729 | ||
64672c95 YJ |
1730 | /* |
1731 | * Comment's format: document - errata name - stepping - processor name. | |
1732 | * Refer from | |
1733 | * https://www.virtualbox.org/svn/vbox/trunk/src/VBox/VMM/VMMR0/HMR0.cpp | |
1734 | */ | |
1735 | static u32 vmx_preemption_cpu_tfms[] = { | |
1736 | /* 323344.pdf - BA86 - D0 - Xeon 7500 Series */ | |
1737 | 0x000206E6, | |
1738 | /* 323056.pdf - AAX65 - C2 - Xeon L3406 */ | |
1739 | /* 322814.pdf - AAT59 - C2 - i7-600, i5-500, i5-400 and i3-300 Mobile */ | |
1740 | /* 322911.pdf - AAU65 - C2 - i5-600, i3-500 Desktop and Pentium G6950 */ | |
1741 | 0x00020652, | |
1742 | /* 322911.pdf - AAU65 - K0 - i5-600, i3-500 Desktop and Pentium G6950 */ | |
1743 | 0x00020655, | |
1744 | /* 322373.pdf - AAO95 - B1 - Xeon 3400 Series */ | |
1745 | /* 322166.pdf - AAN92 - B1 - i7-800 and i5-700 Desktop */ | |
1746 | /* | |
1747 | * 320767.pdf - AAP86 - B1 - | |
1748 | * i7-900 Mobile Extreme, i7-800 and i7-700 Mobile | |
1749 | */ | |
1750 | 0x000106E5, | |
1751 | /* 321333.pdf - AAM126 - C0 - Xeon 3500 */ | |
1752 | 0x000106A0, | |
1753 | /* 321333.pdf - AAM126 - C1 - Xeon 3500 */ | |
1754 | 0x000106A1, | |
1755 | /* 320836.pdf - AAJ124 - C0 - i7-900 Desktop Extreme and i7-900 Desktop */ | |
1756 | 0x000106A4, | |
1757 | /* 321333.pdf - AAM126 - D0 - Xeon 3500 */ | |
1758 | /* 321324.pdf - AAK139 - D0 - Xeon 5500 */ | |
1759 | /* 320836.pdf - AAJ124 - D0 - i7-900 Extreme and i7-900 Desktop */ | |
1760 | 0x000106A5, | |
1761 | }; | |
1762 | ||
1763 | static inline bool cpu_has_broken_vmx_preemption_timer(void) | |
1764 | { | |
1765 | u32 eax = cpuid_eax(0x00000001), i; | |
1766 | ||
1767 | /* Clear the reserved bits */ | |
1768 | eax &= ~(0x3U << 14 | 0xfU << 28); | |
03f6a22a | 1769 | for (i = 0; i < ARRAY_SIZE(vmx_preemption_cpu_tfms); i++) |
64672c95 YJ |
1770 | if (eax == vmx_preemption_cpu_tfms[i]) |
1771 | return true; | |
1772 | ||
1773 | return false; | |
1774 | } | |
1775 | ||
1776 | static inline bool cpu_has_vmx_preemption_timer(void) | |
1777 | { | |
64672c95 YJ |
1778 | return vmcs_config.pin_based_exec_ctrl & |
1779 | PIN_BASED_VMX_PREEMPTION_TIMER; | |
1780 | } | |
1781 | ||
01e439be YZ |
1782 | static inline bool cpu_has_vmx_posted_intr(void) |
1783 | { | |
d6a858d1 PB |
1784 | return IS_ENABLED(CONFIG_X86_LOCAL_APIC) && |
1785 | vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR; | |
01e439be YZ |
1786 | } |
1787 | ||
1788 | static inline bool cpu_has_vmx_apicv(void) | |
1789 | { | |
1790 | return cpu_has_vmx_apic_register_virt() && | |
1791 | cpu_has_vmx_virtual_intr_delivery() && | |
1792 | cpu_has_vmx_posted_intr(); | |
1793 | } | |
1794 | ||
04547156 SY |
1795 | static inline bool cpu_has_vmx_flexpriority(void) |
1796 | { | |
1797 | return cpu_has_vmx_tpr_shadow() && | |
1798 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
1799 | } |
1800 | ||
e799794e MT |
1801 | static inline bool cpu_has_vmx_ept_execute_only(void) |
1802 | { | |
31299944 | 1803 | return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; |
e799794e MT |
1804 | } |
1805 | ||
e799794e MT |
1806 | static inline bool cpu_has_vmx_ept_2m_page(void) |
1807 | { | |
31299944 | 1808 | return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; |
e799794e MT |
1809 | } |
1810 | ||
878403b7 SY |
1811 | static inline bool cpu_has_vmx_ept_1g_page(void) |
1812 | { | |
31299944 | 1813 | return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; |
878403b7 SY |
1814 | } |
1815 | ||
4bc9b982 SY |
1816 | static inline bool cpu_has_vmx_ept_4levels(void) |
1817 | { | |
1818 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; | |
1819 | } | |
1820 | ||
42aa53b4 DH |
1821 | static inline bool cpu_has_vmx_ept_mt_wb(void) |
1822 | { | |
1823 | return vmx_capability.ept & VMX_EPTP_WB_BIT; | |
1824 | } | |
1825 | ||
855feb67 YZ |
1826 | static inline bool cpu_has_vmx_ept_5levels(void) |
1827 | { | |
1828 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_5_BIT; | |
1829 | } | |
1830 | ||
83c3a331 XH |
1831 | static inline bool cpu_has_vmx_ept_ad_bits(void) |
1832 | { | |
1833 | return vmx_capability.ept & VMX_EPT_AD_BIT; | |
1834 | } | |
1835 | ||
31299944 | 1836 | static inline bool cpu_has_vmx_invept_context(void) |
d56f546d | 1837 | { |
31299944 | 1838 | return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; |
d56f546d SY |
1839 | } |
1840 | ||
31299944 | 1841 | static inline bool cpu_has_vmx_invept_global(void) |
d56f546d | 1842 | { |
31299944 | 1843 | return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; |
d56f546d SY |
1844 | } |
1845 | ||
cd9a491f LA |
1846 | static inline bool cpu_has_vmx_invvpid_individual_addr(void) |
1847 | { | |
1848 | return vmx_capability.vpid & VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT; | |
1849 | } | |
1850 | ||
518c8aee GJ |
1851 | static inline bool cpu_has_vmx_invvpid_single(void) |
1852 | { | |
1853 | return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; | |
1854 | } | |
1855 | ||
b9d762fa GJ |
1856 | static inline bool cpu_has_vmx_invvpid_global(void) |
1857 | { | |
1858 | return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
1859 | } | |
1860 | ||
08d839c4 WL |
1861 | static inline bool cpu_has_vmx_invvpid(void) |
1862 | { | |
1863 | return vmx_capability.vpid & VMX_VPID_INVVPID_BIT; | |
1864 | } | |
1865 | ||
31299944 | 1866 | static inline bool cpu_has_vmx_ept(void) |
d56f546d | 1867 | { |
04547156 SY |
1868 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
1869 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
1870 | } |
1871 | ||
31299944 | 1872 | static inline bool cpu_has_vmx_unrestricted_guest(void) |
3a624e29 NK |
1873 | { |
1874 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1875 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
1876 | } | |
1877 | ||
31299944 | 1878 | static inline bool cpu_has_vmx_ple(void) |
4b8d54f9 ZE |
1879 | { |
1880 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1881 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
1882 | } | |
1883 | ||
9ac7e3e8 JD |
1884 | static inline bool cpu_has_vmx_basic_inout(void) |
1885 | { | |
1886 | return (((u64)vmcs_config.basic_cap << 32) & VMX_BASIC_INOUT); | |
1887 | } | |
1888 | ||
35754c98 | 1889 | static inline bool cpu_need_virtualize_apic_accesses(struct kvm_vcpu *vcpu) |
f78e0e2e | 1890 | { |
35754c98 | 1891 | return flexpriority_enabled && lapic_in_kernel(vcpu); |
f78e0e2e SY |
1892 | } |
1893 | ||
31299944 | 1894 | static inline bool cpu_has_vmx_vpid(void) |
2384d2b3 | 1895 | { |
04547156 SY |
1896 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
1897 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
1898 | } |
1899 | ||
31299944 | 1900 | static inline bool cpu_has_vmx_rdtscp(void) |
4e47c7a6 SY |
1901 | { |
1902 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1903 | SECONDARY_EXEC_RDTSCP; | |
1904 | } | |
1905 | ||
ad756a16 MJ |
1906 | static inline bool cpu_has_vmx_invpcid(void) |
1907 | { | |
1908 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1909 | SECONDARY_EXEC_ENABLE_INVPCID; | |
1910 | } | |
1911 | ||
8a1b4392 PB |
1912 | static inline bool cpu_has_virtual_nmis(void) |
1913 | { | |
1914 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
1915 | } | |
1916 | ||
f5f48ee1 SY |
1917 | static inline bool cpu_has_vmx_wbinvd_exit(void) |
1918 | { | |
1919 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1920 | SECONDARY_EXEC_WBINVD_EXITING; | |
1921 | } | |
1922 | ||
abc4fc58 AG |
1923 | static inline bool cpu_has_vmx_shadow_vmcs(void) |
1924 | { | |
1925 | u64 vmx_msr; | |
1926 | rdmsrl(MSR_IA32_VMX_MISC, vmx_msr); | |
1927 | /* check if the cpu supports writing r/o exit information fields */ | |
1928 | if (!(vmx_msr & MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS)) | |
1929 | return false; | |
1930 | ||
1931 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1932 | SECONDARY_EXEC_SHADOW_VMCS; | |
1933 | } | |
1934 | ||
843e4330 KH |
1935 | static inline bool cpu_has_vmx_pml(void) |
1936 | { | |
1937 | return vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_ENABLE_PML; | |
1938 | } | |
1939 | ||
64903d61 HZ |
1940 | static inline bool cpu_has_vmx_tsc_scaling(void) |
1941 | { | |
1942 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1943 | SECONDARY_EXEC_TSC_SCALING; | |
1944 | } | |
1945 | ||
2a499e49 BD |
1946 | static inline bool cpu_has_vmx_vmfunc(void) |
1947 | { | |
1948 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1949 | SECONDARY_EXEC_ENABLE_VMFUNC; | |
1950 | } | |
1951 | ||
64f7a115 SC |
1952 | static bool vmx_umip_emulated(void) |
1953 | { | |
1954 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
1955 | SECONDARY_EXEC_DESC; | |
1956 | } | |
1957 | ||
04547156 SY |
1958 | static inline bool report_flexpriority(void) |
1959 | { | |
1960 | return flexpriority_enabled; | |
1961 | } | |
1962 | ||
c7c2c709 JM |
1963 | static inline unsigned nested_cpu_vmx_misc_cr3_count(struct kvm_vcpu *vcpu) |
1964 | { | |
6677f3da | 1965 | return vmx_misc_cr3_count(to_vmx(vcpu)->nested.msrs.misc_low); |
c7c2c709 JM |
1966 | } |
1967 | ||
f4160e45 JM |
1968 | /* |
1969 | * Do the virtual VMX capability MSRs specify that L1 can use VMWRITE | |
1970 | * to modify any valid field of the VMCS, or are the VM-exit | |
1971 | * information fields read-only? | |
1972 | */ | |
1973 | static inline bool nested_cpu_has_vmwrite_any_field(struct kvm_vcpu *vcpu) | |
1974 | { | |
1975 | return to_vmx(vcpu)->nested.msrs.misc_low & | |
1976 | MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS; | |
1977 | } | |
1978 | ||
0447378a MO |
1979 | static inline bool nested_cpu_has_zero_length_injection(struct kvm_vcpu *vcpu) |
1980 | { | |
1981 | return to_vmx(vcpu)->nested.msrs.misc_low & VMX_MISC_ZERO_LEN_INS; | |
1982 | } | |
1983 | ||
1984 | static inline bool nested_cpu_supports_monitor_trap_flag(struct kvm_vcpu *vcpu) | |
1985 | { | |
1986 | return to_vmx(vcpu)->nested.msrs.procbased_ctls_high & | |
1987 | CPU_BASED_MONITOR_TRAP_FLAG; | |
1988 | } | |
1989 | ||
fa97d7db LA |
1990 | static inline bool nested_cpu_has_vmx_shadow_vmcs(struct kvm_vcpu *vcpu) |
1991 | { | |
1992 | return to_vmx(vcpu)->nested.msrs.secondary_ctls_high & | |
1993 | SECONDARY_EXEC_SHADOW_VMCS; | |
1994 | } | |
1995 | ||
fe3ef05c NHE |
1996 | static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit) |
1997 | { | |
1998 | return vmcs12->cpu_based_vm_exec_control & bit; | |
1999 | } | |
2000 | ||
2001 | static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit) | |
2002 | { | |
2003 | return (vmcs12->cpu_based_vm_exec_control & | |
2004 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) && | |
2005 | (vmcs12->secondary_vm_exec_control & bit); | |
2006 | } | |
2007 | ||
f4124500 JK |
2008 | static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12) |
2009 | { | |
2010 | return vmcs12->pin_based_vm_exec_control & | |
2011 | PIN_BASED_VMX_PREEMPTION_TIMER; | |
2012 | } | |
2013 | ||
0c7f650e KS |
2014 | static inline bool nested_cpu_has_nmi_exiting(struct vmcs12 *vmcs12) |
2015 | { | |
2016 | return vmcs12->pin_based_vm_exec_control & PIN_BASED_NMI_EXITING; | |
2017 | } | |
2018 | ||
2019 | static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12) | |
2020 | { | |
2021 | return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS; | |
2022 | } | |
2023 | ||
155a97a3 NHE |
2024 | static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12) |
2025 | { | |
2026 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT); | |
2027 | } | |
2028 | ||
81dc01f7 WL |
2029 | static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12) |
2030 | { | |
3db13480 | 2031 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES); |
81dc01f7 WL |
2032 | } |
2033 | ||
c5f983f6 BD |
2034 | static inline bool nested_cpu_has_pml(struct vmcs12 *vmcs12) |
2035 | { | |
2036 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_PML); | |
2037 | } | |
2038 | ||
f2b93280 WV |
2039 | static inline bool nested_cpu_has_virt_x2apic_mode(struct vmcs12 *vmcs12) |
2040 | { | |
2041 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE); | |
2042 | } | |
2043 | ||
5c614b35 WL |
2044 | static inline bool nested_cpu_has_vpid(struct vmcs12 *vmcs12) |
2045 | { | |
2046 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VPID); | |
2047 | } | |
2048 | ||
82f0dd4b WV |
2049 | static inline bool nested_cpu_has_apic_reg_virt(struct vmcs12 *vmcs12) |
2050 | { | |
2051 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_APIC_REGISTER_VIRT); | |
2052 | } | |
2053 | ||
608406e2 WV |
2054 | static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12) |
2055 | { | |
2056 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
2057 | } | |
2058 | ||
705699a1 WV |
2059 | static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12) |
2060 | { | |
2061 | return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR; | |
2062 | } | |
2063 | ||
27c42a1b BD |
2064 | static inline bool nested_cpu_has_vmfunc(struct vmcs12 *vmcs12) |
2065 | { | |
2066 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VMFUNC); | |
2067 | } | |
2068 | ||
41ab9372 BD |
2069 | static inline bool nested_cpu_has_eptp_switching(struct vmcs12 *vmcs12) |
2070 | { | |
2071 | return nested_cpu_has_vmfunc(vmcs12) && | |
2072 | (vmcs12->vm_function_control & | |
2073 | VMX_VMFUNC_EPTP_SWITCHING); | |
2074 | } | |
2075 | ||
f792d274 LA |
2076 | static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12) |
2077 | { | |
2078 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_SHADOW_VMCS); | |
2079 | } | |
2080 | ||
ef85b673 | 2081 | static inline bool is_nmi(u32 intr_info) |
644d711a NHE |
2082 | { |
2083 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
ef85b673 | 2084 | == (INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK); |
644d711a NHE |
2085 | } |
2086 | ||
533558bc JK |
2087 | static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, |
2088 | u32 exit_intr_info, | |
2089 | unsigned long exit_qualification); | |
7c177938 | 2090 | |
8b9cf98c | 2091 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
2092 | { |
2093 | int i; | |
2094 | ||
a2fa3e9f | 2095 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 2096 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
2097 | return i; |
2098 | return -1; | |
2099 | } | |
2100 | ||
5ebb272b | 2101 | static inline void __invvpid(unsigned long ext, u16 vpid, gva_t gva) |
2384d2b3 SY |
2102 | { |
2103 | struct { | |
2104 | u64 vpid : 16; | |
2105 | u64 rsvd : 48; | |
2106 | u64 gva; | |
2107 | } operand = { vpid, 0, gva }; | |
fd8ca6da | 2108 | bool error; |
2384d2b3 | 2109 | |
4b1e5478 UB |
2110 | asm volatile (__ex("invvpid %2, %1") CC_SET(na) |
2111 | : CC_OUT(na) (error) : "r"(ext), "m"(operand)); | |
fd8ca6da | 2112 | BUG_ON(error); |
2384d2b3 SY |
2113 | } |
2114 | ||
5ebb272b | 2115 | static inline void __invept(unsigned long ext, u64 eptp, gpa_t gpa) |
1439442c SY |
2116 | { |
2117 | struct { | |
2118 | u64 eptp, gpa; | |
2119 | } operand = {eptp, gpa}; | |
fd8ca6da | 2120 | bool error; |
1439442c | 2121 | |
4b1e5478 UB |
2122 | asm volatile (__ex("invept %2, %1") CC_SET(na) |
2123 | : CC_OUT(na) (error) : "r"(ext), "m"(operand)); | |
fd8ca6da | 2124 | BUG_ON(error); |
1439442c SY |
2125 | } |
2126 | ||
26bb0981 | 2127 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
2128 | { |
2129 | int i; | |
2130 | ||
8b9cf98c | 2131 | i = __find_msr_index(vmx, msr); |
a75beee6 | 2132 | if (i >= 0) |
a2fa3e9f | 2133 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 2134 | return NULL; |
7725f0ba AK |
2135 | } |
2136 | ||
6aa8b732 AK |
2137 | static void vmcs_clear(struct vmcs *vmcs) |
2138 | { | |
2139 | u64 phys_addr = __pa(vmcs); | |
fd8ca6da | 2140 | bool error; |
6aa8b732 | 2141 | |
4b1e5478 UB |
2142 | asm volatile (__ex("vmclear %1") CC_SET(na) |
2143 | : CC_OUT(na) (error) : "m"(phys_addr)); | |
fd8ca6da | 2144 | if (unlikely(error)) |
6aa8b732 AK |
2145 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", |
2146 | vmcs, phys_addr); | |
2147 | } | |
2148 | ||
d462b819 NHE |
2149 | static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs) |
2150 | { | |
2151 | vmcs_clear(loaded_vmcs->vmcs); | |
355f4fb1 JM |
2152 | if (loaded_vmcs->shadow_vmcs && loaded_vmcs->launched) |
2153 | vmcs_clear(loaded_vmcs->shadow_vmcs); | |
d462b819 NHE |
2154 | loaded_vmcs->cpu = -1; |
2155 | loaded_vmcs->launched = 0; | |
2156 | } | |
2157 | ||
7725b894 DX |
2158 | static void vmcs_load(struct vmcs *vmcs) |
2159 | { | |
2160 | u64 phys_addr = __pa(vmcs); | |
fd8ca6da | 2161 | bool error; |
7725b894 | 2162 | |
773e8a04 VK |
2163 | if (static_branch_unlikely(&enable_evmcs)) |
2164 | return evmcs_load(phys_addr); | |
2165 | ||
4b1e5478 UB |
2166 | asm volatile (__ex("vmptrld %1") CC_SET(na) |
2167 | : CC_OUT(na) (error) : "m"(phys_addr)); | |
fd8ca6da | 2168 | if (unlikely(error)) |
2844d849 | 2169 | printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n", |
7725b894 DX |
2170 | vmcs, phys_addr); |
2171 | } | |
2172 | ||
2965faa5 | 2173 | #ifdef CONFIG_KEXEC_CORE |
8f536b76 ZY |
2174 | /* |
2175 | * This bitmap is used to indicate whether the vmclear | |
2176 | * operation is enabled on all cpus. All disabled by | |
2177 | * default. | |
2178 | */ | |
2179 | static cpumask_t crash_vmclear_enabled_bitmap = CPU_MASK_NONE; | |
2180 | ||
2181 | static inline void crash_enable_local_vmclear(int cpu) | |
2182 | { | |
2183 | cpumask_set_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
2184 | } | |
2185 | ||
2186 | static inline void crash_disable_local_vmclear(int cpu) | |
2187 | { | |
2188 | cpumask_clear_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
2189 | } | |
2190 | ||
2191 | static inline int crash_local_vmclear_enabled(int cpu) | |
2192 | { | |
2193 | return cpumask_test_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
2194 | } | |
2195 | ||
2196 | static void crash_vmclear_local_loaded_vmcss(void) | |
2197 | { | |
2198 | int cpu = raw_smp_processor_id(); | |
2199 | struct loaded_vmcs *v; | |
2200 | ||
2201 | if (!crash_local_vmclear_enabled(cpu)) | |
2202 | return; | |
2203 | ||
2204 | list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu), | |
2205 | loaded_vmcss_on_cpu_link) | |
2206 | vmcs_clear(v->vmcs); | |
2207 | } | |
2208 | #else | |
2209 | static inline void crash_enable_local_vmclear(int cpu) { } | |
2210 | static inline void crash_disable_local_vmclear(int cpu) { } | |
2965faa5 | 2211 | #endif /* CONFIG_KEXEC_CORE */ |
8f536b76 | 2212 | |
d462b819 | 2213 | static void __loaded_vmcs_clear(void *arg) |
6aa8b732 | 2214 | { |
d462b819 | 2215 | struct loaded_vmcs *loaded_vmcs = arg; |
d3b2c338 | 2216 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 2217 | |
d462b819 NHE |
2218 | if (loaded_vmcs->cpu != cpu) |
2219 | return; /* vcpu migration can race with cpu offline */ | |
2220 | if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs) | |
6aa8b732 | 2221 | per_cpu(current_vmcs, cpu) = NULL; |
8f536b76 | 2222 | crash_disable_local_vmclear(cpu); |
d462b819 | 2223 | list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link); |
5a560f8b XG |
2224 | |
2225 | /* | |
2226 | * we should ensure updating loaded_vmcs->loaded_vmcss_on_cpu_link | |
2227 | * is before setting loaded_vmcs->vcpu to -1 which is done in | |
2228 | * loaded_vmcs_init. Otherwise, other cpu can see vcpu = -1 fist | |
2229 | * then adds the vmcs into percpu list before it is deleted. | |
2230 | */ | |
2231 | smp_wmb(); | |
2232 | ||
d462b819 | 2233 | loaded_vmcs_init(loaded_vmcs); |
8f536b76 | 2234 | crash_enable_local_vmclear(cpu); |
6aa8b732 AK |
2235 | } |
2236 | ||
d462b819 | 2237 | static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs) |
8d0be2b3 | 2238 | { |
e6c7d321 XG |
2239 | int cpu = loaded_vmcs->cpu; |
2240 | ||
2241 | if (cpu != -1) | |
2242 | smp_call_function_single(cpu, | |
2243 | __loaded_vmcs_clear, loaded_vmcs, 1); | |
8d0be2b3 AK |
2244 | } |
2245 | ||
faff8758 JS |
2246 | static inline bool vpid_sync_vcpu_addr(int vpid, gva_t addr) |
2247 | { | |
2248 | if (vpid == 0) | |
2249 | return true; | |
2250 | ||
2251 | if (cpu_has_vmx_invvpid_individual_addr()) { | |
2252 | __invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR, vpid, addr); | |
2253 | return true; | |
2254 | } | |
2255 | ||
2256 | return false; | |
2257 | } | |
2258 | ||
dd5f5341 | 2259 | static inline void vpid_sync_vcpu_single(int vpid) |
2384d2b3 | 2260 | { |
dd5f5341 | 2261 | if (vpid == 0) |
2384d2b3 SY |
2262 | return; |
2263 | ||
518c8aee | 2264 | if (cpu_has_vmx_invvpid_single()) |
dd5f5341 | 2265 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vpid, 0); |
2384d2b3 SY |
2266 | } |
2267 | ||
b9d762fa GJ |
2268 | static inline void vpid_sync_vcpu_global(void) |
2269 | { | |
2270 | if (cpu_has_vmx_invvpid_global()) | |
2271 | __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0); | |
2272 | } | |
2273 | ||
dd5f5341 | 2274 | static inline void vpid_sync_context(int vpid) |
b9d762fa GJ |
2275 | { |
2276 | if (cpu_has_vmx_invvpid_single()) | |
dd5f5341 | 2277 | vpid_sync_vcpu_single(vpid); |
b9d762fa GJ |
2278 | else |
2279 | vpid_sync_vcpu_global(); | |
2280 | } | |
2281 | ||
1439442c SY |
2282 | static inline void ept_sync_global(void) |
2283 | { | |
f5f51586 | 2284 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); |
1439442c SY |
2285 | } |
2286 | ||
2287 | static inline void ept_sync_context(u64 eptp) | |
2288 | { | |
0e1252dc DH |
2289 | if (cpu_has_vmx_invept_context()) |
2290 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
2291 | else | |
2292 | ept_sync_global(); | |
1439442c SY |
2293 | } |
2294 | ||
8a86aea9 PB |
2295 | static __always_inline void vmcs_check16(unsigned long field) |
2296 | { | |
2297 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000, | |
2298 | "16-bit accessor invalid for 64-bit field"); | |
2299 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001, | |
2300 | "16-bit accessor invalid for 64-bit high field"); | |
2301 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000, | |
2302 | "16-bit accessor invalid for 32-bit high field"); | |
2303 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000, | |
2304 | "16-bit accessor invalid for natural width field"); | |
2305 | } | |
2306 | ||
2307 | static __always_inline void vmcs_check32(unsigned long field) | |
2308 | { | |
2309 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0, | |
2310 | "32-bit accessor invalid for 16-bit field"); | |
2311 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000, | |
2312 | "32-bit accessor invalid for natural width field"); | |
2313 | } | |
2314 | ||
2315 | static __always_inline void vmcs_check64(unsigned long field) | |
2316 | { | |
2317 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0, | |
2318 | "64-bit accessor invalid for 16-bit field"); | |
2319 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001, | |
2320 | "64-bit accessor invalid for 64-bit high field"); | |
2321 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000, | |
2322 | "64-bit accessor invalid for 32-bit field"); | |
2323 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x6000, | |
2324 | "64-bit accessor invalid for natural width field"); | |
2325 | } | |
2326 | ||
2327 | static __always_inline void vmcs_checkl(unsigned long field) | |
2328 | { | |
2329 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0, | |
2330 | "Natural width accessor invalid for 16-bit field"); | |
2331 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2000, | |
2332 | "Natural width accessor invalid for 64-bit field"); | |
2333 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6001) == 0x2001, | |
2334 | "Natural width accessor invalid for 64-bit high field"); | |
2335 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x4000, | |
2336 | "Natural width accessor invalid for 32-bit field"); | |
2337 | } | |
2338 | ||
2339 | static __always_inline unsigned long __vmcs_readl(unsigned long field) | |
6aa8b732 | 2340 | { |
5e520e62 | 2341 | unsigned long value; |
6aa8b732 | 2342 | |
44c2d667 | 2343 | asm volatile (__ex_clear("vmread %1, %0", "%k0") |
4b1e5478 | 2344 | : "=r"(value) : "r"(field)); |
6aa8b732 AK |
2345 | return value; |
2346 | } | |
2347 | ||
96304217 | 2348 | static __always_inline u16 vmcs_read16(unsigned long field) |
6aa8b732 | 2349 | { |
8a86aea9 | 2350 | vmcs_check16(field); |
773e8a04 VK |
2351 | if (static_branch_unlikely(&enable_evmcs)) |
2352 | return evmcs_read16(field); | |
8a86aea9 | 2353 | return __vmcs_readl(field); |
6aa8b732 AK |
2354 | } |
2355 | ||
96304217 | 2356 | static __always_inline u32 vmcs_read32(unsigned long field) |
6aa8b732 | 2357 | { |
8a86aea9 | 2358 | vmcs_check32(field); |
773e8a04 VK |
2359 | if (static_branch_unlikely(&enable_evmcs)) |
2360 | return evmcs_read32(field); | |
8a86aea9 | 2361 | return __vmcs_readl(field); |
6aa8b732 AK |
2362 | } |
2363 | ||
96304217 | 2364 | static __always_inline u64 vmcs_read64(unsigned long field) |
6aa8b732 | 2365 | { |
8a86aea9 | 2366 | vmcs_check64(field); |
773e8a04 VK |
2367 | if (static_branch_unlikely(&enable_evmcs)) |
2368 | return evmcs_read64(field); | |
05b3e0c2 | 2369 | #ifdef CONFIG_X86_64 |
8a86aea9 | 2370 | return __vmcs_readl(field); |
6aa8b732 | 2371 | #else |
8a86aea9 | 2372 | return __vmcs_readl(field) | ((u64)__vmcs_readl(field+1) << 32); |
6aa8b732 AK |
2373 | #endif |
2374 | } | |
2375 | ||
8a86aea9 PB |
2376 | static __always_inline unsigned long vmcs_readl(unsigned long field) |
2377 | { | |
2378 | vmcs_checkl(field); | |
773e8a04 VK |
2379 | if (static_branch_unlikely(&enable_evmcs)) |
2380 | return evmcs_read64(field); | |
8a86aea9 PB |
2381 | return __vmcs_readl(field); |
2382 | } | |
2383 | ||
e52de1b8 AK |
2384 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
2385 | { | |
2386 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
2387 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
2388 | dump_stack(); | |
2389 | } | |
2390 | ||
8a86aea9 | 2391 | static __always_inline void __vmcs_writel(unsigned long field, unsigned long value) |
6aa8b732 | 2392 | { |
fd8ca6da | 2393 | bool error; |
6aa8b732 | 2394 | |
4b1e5478 UB |
2395 | asm volatile (__ex("vmwrite %2, %1") CC_SET(na) |
2396 | : CC_OUT(na) (error) : "r"(field), "rm"(value)); | |
e52de1b8 AK |
2397 | if (unlikely(error)) |
2398 | vmwrite_error(field, value); | |
6aa8b732 AK |
2399 | } |
2400 | ||
8a86aea9 | 2401 | static __always_inline void vmcs_write16(unsigned long field, u16 value) |
6aa8b732 | 2402 | { |
8a86aea9 | 2403 | vmcs_check16(field); |
773e8a04 VK |
2404 | if (static_branch_unlikely(&enable_evmcs)) |
2405 | return evmcs_write16(field, value); | |
2406 | ||
8a86aea9 | 2407 | __vmcs_writel(field, value); |
6aa8b732 AK |
2408 | } |
2409 | ||
8a86aea9 | 2410 | static __always_inline void vmcs_write32(unsigned long field, u32 value) |
6aa8b732 | 2411 | { |
8a86aea9 | 2412 | vmcs_check32(field); |
773e8a04 VK |
2413 | if (static_branch_unlikely(&enable_evmcs)) |
2414 | return evmcs_write32(field, value); | |
2415 | ||
8a86aea9 | 2416 | __vmcs_writel(field, value); |
6aa8b732 AK |
2417 | } |
2418 | ||
8a86aea9 | 2419 | static __always_inline void vmcs_write64(unsigned long field, u64 value) |
6aa8b732 | 2420 | { |
8a86aea9 | 2421 | vmcs_check64(field); |
773e8a04 VK |
2422 | if (static_branch_unlikely(&enable_evmcs)) |
2423 | return evmcs_write64(field, value); | |
2424 | ||
8a86aea9 | 2425 | __vmcs_writel(field, value); |
7682f2d0 | 2426 | #ifndef CONFIG_X86_64 |
6aa8b732 | 2427 | asm volatile (""); |
8a86aea9 | 2428 | __vmcs_writel(field+1, value >> 32); |
6aa8b732 AK |
2429 | #endif |
2430 | } | |
2431 | ||
8a86aea9 | 2432 | static __always_inline void vmcs_writel(unsigned long field, unsigned long value) |
2ab455cc | 2433 | { |
8a86aea9 | 2434 | vmcs_checkl(field); |
773e8a04 VK |
2435 | if (static_branch_unlikely(&enable_evmcs)) |
2436 | return evmcs_write64(field, value); | |
2437 | ||
8a86aea9 | 2438 | __vmcs_writel(field, value); |
2ab455cc AL |
2439 | } |
2440 | ||
8a86aea9 | 2441 | static __always_inline void vmcs_clear_bits(unsigned long field, u32 mask) |
2ab455cc | 2442 | { |
8a86aea9 PB |
2443 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000, |
2444 | "vmcs_clear_bits does not support 64-bit fields"); | |
773e8a04 VK |
2445 | if (static_branch_unlikely(&enable_evmcs)) |
2446 | return evmcs_write32(field, evmcs_read32(field) & ~mask); | |
2447 | ||
8a86aea9 | 2448 | __vmcs_writel(field, __vmcs_readl(field) & ~mask); |
2ab455cc AL |
2449 | } |
2450 | ||
8a86aea9 | 2451 | static __always_inline void vmcs_set_bits(unsigned long field, u32 mask) |
2ab455cc | 2452 | { |
8a86aea9 PB |
2453 | BUILD_BUG_ON_MSG(__builtin_constant_p(field) && ((field) & 0x6000) == 0x2000, |
2454 | "vmcs_set_bits does not support 64-bit fields"); | |
773e8a04 VK |
2455 | if (static_branch_unlikely(&enable_evmcs)) |
2456 | return evmcs_write32(field, evmcs_read32(field) | mask); | |
2457 | ||
8a86aea9 | 2458 | __vmcs_writel(field, __vmcs_readl(field) | mask); |
2ab455cc AL |
2459 | } |
2460 | ||
8391ce44 PB |
2461 | static inline void vm_entry_controls_reset_shadow(struct vcpu_vmx *vmx) |
2462 | { | |
2463 | vmx->vm_entry_controls_shadow = vmcs_read32(VM_ENTRY_CONTROLS); | |
2464 | } | |
2465 | ||
2961e876 GN |
2466 | static inline void vm_entry_controls_init(struct vcpu_vmx *vmx, u32 val) |
2467 | { | |
2468 | vmcs_write32(VM_ENTRY_CONTROLS, val); | |
2469 | vmx->vm_entry_controls_shadow = val; | |
2470 | } | |
2471 | ||
2472 | static inline void vm_entry_controls_set(struct vcpu_vmx *vmx, u32 val) | |
2473 | { | |
2474 | if (vmx->vm_entry_controls_shadow != val) | |
2475 | vm_entry_controls_init(vmx, val); | |
2476 | } | |
2477 | ||
2478 | static inline u32 vm_entry_controls_get(struct vcpu_vmx *vmx) | |
2479 | { | |
2480 | return vmx->vm_entry_controls_shadow; | |
2481 | } | |
2482 | ||
2483 | ||
2484 | static inline void vm_entry_controls_setbit(struct vcpu_vmx *vmx, u32 val) | |
2485 | { | |
2486 | vm_entry_controls_set(vmx, vm_entry_controls_get(vmx) | val); | |
2487 | } | |
2488 | ||
2489 | static inline void vm_entry_controls_clearbit(struct vcpu_vmx *vmx, u32 val) | |
2490 | { | |
2491 | vm_entry_controls_set(vmx, vm_entry_controls_get(vmx) & ~val); | |
2492 | } | |
2493 | ||
8391ce44 PB |
2494 | static inline void vm_exit_controls_reset_shadow(struct vcpu_vmx *vmx) |
2495 | { | |
2496 | vmx->vm_exit_controls_shadow = vmcs_read32(VM_EXIT_CONTROLS); | |
2497 | } | |
2498 | ||
2961e876 GN |
2499 | static inline void vm_exit_controls_init(struct vcpu_vmx *vmx, u32 val) |
2500 | { | |
2501 | vmcs_write32(VM_EXIT_CONTROLS, val); | |
2502 | vmx->vm_exit_controls_shadow = val; | |
2503 | } | |
2504 | ||
2505 | static inline void vm_exit_controls_set(struct vcpu_vmx *vmx, u32 val) | |
2506 | { | |
2507 | if (vmx->vm_exit_controls_shadow != val) | |
2508 | vm_exit_controls_init(vmx, val); | |
2509 | } | |
2510 | ||
2511 | static inline u32 vm_exit_controls_get(struct vcpu_vmx *vmx) | |
2512 | { | |
2513 | return vmx->vm_exit_controls_shadow; | |
2514 | } | |
2515 | ||
2516 | ||
2517 | static inline void vm_exit_controls_setbit(struct vcpu_vmx *vmx, u32 val) | |
2518 | { | |
2519 | vm_exit_controls_set(vmx, vm_exit_controls_get(vmx) | val); | |
2520 | } | |
2521 | ||
2522 | static inline void vm_exit_controls_clearbit(struct vcpu_vmx *vmx, u32 val) | |
2523 | { | |
2524 | vm_exit_controls_set(vmx, vm_exit_controls_get(vmx) & ~val); | |
2525 | } | |
2526 | ||
2fb92db1 AK |
2527 | static void vmx_segment_cache_clear(struct vcpu_vmx *vmx) |
2528 | { | |
2529 | vmx->segment_cache.bitmask = 0; | |
2530 | } | |
2531 | ||
2532 | static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg, | |
2533 | unsigned field) | |
2534 | { | |
2535 | bool ret; | |
2536 | u32 mask = 1 << (seg * SEG_FIELD_NR + field); | |
2537 | ||
2538 | if (!(vmx->vcpu.arch.regs_avail & (1 << VCPU_EXREG_SEGMENTS))) { | |
2539 | vmx->vcpu.arch.regs_avail |= (1 << VCPU_EXREG_SEGMENTS); | |
2540 | vmx->segment_cache.bitmask = 0; | |
2541 | } | |
2542 | ret = vmx->segment_cache.bitmask & mask; | |
2543 | vmx->segment_cache.bitmask |= mask; | |
2544 | return ret; | |
2545 | } | |
2546 | ||
2547 | static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg) | |
2548 | { | |
2549 | u16 *p = &vmx->segment_cache.seg[seg].selector; | |
2550 | ||
2551 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL)) | |
2552 | *p = vmcs_read16(kvm_vmx_segment_fields[seg].selector); | |
2553 | return *p; | |
2554 | } | |
2555 | ||
2556 | static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg) | |
2557 | { | |
2558 | ulong *p = &vmx->segment_cache.seg[seg].base; | |
2559 | ||
2560 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE)) | |
2561 | *p = vmcs_readl(kvm_vmx_segment_fields[seg].base); | |
2562 | return *p; | |
2563 | } | |
2564 | ||
2565 | static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg) | |
2566 | { | |
2567 | u32 *p = &vmx->segment_cache.seg[seg].limit; | |
2568 | ||
2569 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT)) | |
2570 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].limit); | |
2571 | return *p; | |
2572 | } | |
2573 | ||
2574 | static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg) | |
2575 | { | |
2576 | u32 *p = &vmx->segment_cache.seg[seg].ar; | |
2577 | ||
2578 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR)) | |
2579 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes); | |
2580 | return *p; | |
2581 | } | |
2582 | ||
abd3f2d6 AK |
2583 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
2584 | { | |
2585 | u32 eb; | |
2586 | ||
fd7373cc | 2587 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) | |
bd7e5b08 | 2588 | (1u << DB_VECTOR) | (1u << AC_VECTOR); |
9e869480 LA |
2589 | /* |
2590 | * Guest access to VMware backdoor ports could legitimately | |
2591 | * trigger #GP because of TSS I/O permission bitmap. | |
2592 | * We intercept those #GP and allow access to them anyway | |
2593 | * as VMware does. | |
2594 | */ | |
2595 | if (enable_vmware_backdoor) | |
2596 | eb |= (1u << GP_VECTOR); | |
fd7373cc JK |
2597 | if ((vcpu->guest_debug & |
2598 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) == | |
2599 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) | |
2600 | eb |= 1u << BP_VECTOR; | |
7ffd92c5 | 2601 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 2602 | eb = ~0; |
089d034e | 2603 | if (enable_ept) |
1439442c | 2604 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
36cf24e0 NHE |
2605 | |
2606 | /* When we are running a nested L2 guest and L1 specified for it a | |
2607 | * certain exception bitmap, we must trap the same exceptions and pass | |
2608 | * them to L1. When running L2, we will only handle the exceptions | |
2609 | * specified above if L1 did not want them. | |
2610 | */ | |
2611 | if (is_guest_mode(vcpu)) | |
2612 | eb |= get_vmcs12(vcpu)->exception_bitmap; | |
2613 | ||
abd3f2d6 AK |
2614 | vmcs_write32(EXCEPTION_BITMAP, eb); |
2615 | } | |
2616 | ||
d28b387f KA |
2617 | /* |
2618 | * Check if MSR is intercepted for currently loaded MSR bitmap. | |
2619 | */ | |
2620 | static bool msr_write_intercepted(struct kvm_vcpu *vcpu, u32 msr) | |
2621 | { | |
2622 | unsigned long *msr_bitmap; | |
2623 | int f = sizeof(unsigned long); | |
2624 | ||
2625 | if (!cpu_has_vmx_msr_bitmap()) | |
2626 | return true; | |
2627 | ||
2628 | msr_bitmap = to_vmx(vcpu)->loaded_vmcs->msr_bitmap; | |
2629 | ||
2630 | if (msr <= 0x1fff) { | |
2631 | return !!test_bit(msr, msr_bitmap + 0x800 / f); | |
2632 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
2633 | msr &= 0x1fff; | |
2634 | return !!test_bit(msr, msr_bitmap + 0xc00 / f); | |
2635 | } | |
2636 | ||
2637 | return true; | |
2638 | } | |
2639 | ||
15d45071 AR |
2640 | /* |
2641 | * Check if MSR is intercepted for L01 MSR bitmap. | |
2642 | */ | |
2643 | static bool msr_write_intercepted_l01(struct kvm_vcpu *vcpu, u32 msr) | |
2644 | { | |
2645 | unsigned long *msr_bitmap; | |
2646 | int f = sizeof(unsigned long); | |
2647 | ||
2648 | if (!cpu_has_vmx_msr_bitmap()) | |
2649 | return true; | |
2650 | ||
2651 | msr_bitmap = to_vmx(vcpu)->vmcs01.msr_bitmap; | |
2652 | ||
2653 | if (msr <= 0x1fff) { | |
2654 | return !!test_bit(msr, msr_bitmap + 0x800 / f); | |
2655 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
2656 | msr &= 0x1fff; | |
2657 | return !!test_bit(msr, msr_bitmap + 0xc00 / f); | |
2658 | } | |
2659 | ||
2660 | return true; | |
2661 | } | |
2662 | ||
2961e876 GN |
2663 | static void clear_atomic_switch_msr_special(struct vcpu_vmx *vmx, |
2664 | unsigned long entry, unsigned long exit) | |
8bf00a52 | 2665 | { |
2961e876 GN |
2666 | vm_entry_controls_clearbit(vmx, entry); |
2667 | vm_exit_controls_clearbit(vmx, exit); | |
8bf00a52 GN |
2668 | } |
2669 | ||
ca83b4a7 KRW |
2670 | static int find_msr(struct vmx_msrs *m, unsigned int msr) |
2671 | { | |
2672 | unsigned int i; | |
2673 | ||
2674 | for (i = 0; i < m->nr; ++i) { | |
2675 | if (m->val[i].index == msr) | |
2676 | return i; | |
2677 | } | |
2678 | return -ENOENT; | |
2679 | } | |
2680 | ||
61d2ef2c AK |
2681 | static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr) |
2682 | { | |
ca83b4a7 | 2683 | int i; |
61d2ef2c AK |
2684 | struct msr_autoload *m = &vmx->msr_autoload; |
2685 | ||
8bf00a52 GN |
2686 | switch (msr) { |
2687 | case MSR_EFER: | |
2688 | if (cpu_has_load_ia32_efer) { | |
2961e876 GN |
2689 | clear_atomic_switch_msr_special(vmx, |
2690 | VM_ENTRY_LOAD_IA32_EFER, | |
8bf00a52 GN |
2691 | VM_EXIT_LOAD_IA32_EFER); |
2692 | return; | |
2693 | } | |
2694 | break; | |
2695 | case MSR_CORE_PERF_GLOBAL_CTRL: | |
2696 | if (cpu_has_load_perf_global_ctrl) { | |
2961e876 | 2697 | clear_atomic_switch_msr_special(vmx, |
8bf00a52 GN |
2698 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, |
2699 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); | |
2700 | return; | |
2701 | } | |
2702 | break; | |
110312c8 | 2703 | } |
ca83b4a7 KRW |
2704 | i = find_msr(&m->guest, msr); |
2705 | if (i < 0) | |
31907093 | 2706 | goto skip_guest; |
33966dd6 | 2707 | --m->guest.nr; |
33966dd6 | 2708 | m->guest.val[i] = m->guest.val[m->guest.nr]; |
33966dd6 | 2709 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->guest.nr); |
110312c8 | 2710 | |
31907093 KRW |
2711 | skip_guest: |
2712 | i = find_msr(&m->host, msr); | |
2713 | if (i < 0) | |
61d2ef2c | 2714 | return; |
31907093 KRW |
2715 | |
2716 | --m->host.nr; | |
2717 | m->host.val[i] = m->host.val[m->host.nr]; | |
33966dd6 | 2718 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->host.nr); |
61d2ef2c AK |
2719 | } |
2720 | ||
2961e876 GN |
2721 | static void add_atomic_switch_msr_special(struct vcpu_vmx *vmx, |
2722 | unsigned long entry, unsigned long exit, | |
2723 | unsigned long guest_val_vmcs, unsigned long host_val_vmcs, | |
2724 | u64 guest_val, u64 host_val) | |
8bf00a52 GN |
2725 | { |
2726 | vmcs_write64(guest_val_vmcs, guest_val); | |
5a5e8a15 SC |
2727 | if (host_val_vmcs != HOST_IA32_EFER) |
2728 | vmcs_write64(host_val_vmcs, host_val); | |
2961e876 GN |
2729 | vm_entry_controls_setbit(vmx, entry); |
2730 | vm_exit_controls_setbit(vmx, exit); | |
8bf00a52 GN |
2731 | } |
2732 | ||
61d2ef2c | 2733 | static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, |
989e3992 | 2734 | u64 guest_val, u64 host_val, bool entry_only) |
61d2ef2c | 2735 | { |
989e3992 | 2736 | int i, j = 0; |
61d2ef2c AK |
2737 | struct msr_autoload *m = &vmx->msr_autoload; |
2738 | ||
8bf00a52 GN |
2739 | switch (msr) { |
2740 | case MSR_EFER: | |
2741 | if (cpu_has_load_ia32_efer) { | |
2961e876 GN |
2742 | add_atomic_switch_msr_special(vmx, |
2743 | VM_ENTRY_LOAD_IA32_EFER, | |
8bf00a52 GN |
2744 | VM_EXIT_LOAD_IA32_EFER, |
2745 | GUEST_IA32_EFER, | |
2746 | HOST_IA32_EFER, | |
2747 | guest_val, host_val); | |
2748 | return; | |
2749 | } | |
2750 | break; | |
2751 | case MSR_CORE_PERF_GLOBAL_CTRL: | |
2752 | if (cpu_has_load_perf_global_ctrl) { | |
2961e876 | 2753 | add_atomic_switch_msr_special(vmx, |
8bf00a52 GN |
2754 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, |
2755 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL, | |
2756 | GUEST_IA32_PERF_GLOBAL_CTRL, | |
2757 | HOST_IA32_PERF_GLOBAL_CTRL, | |
2758 | guest_val, host_val); | |
2759 | return; | |
2760 | } | |
2761 | break; | |
7099e2e1 RK |
2762 | case MSR_IA32_PEBS_ENABLE: |
2763 | /* PEBS needs a quiescent period after being disabled (to write | |
2764 | * a record). Disabling PEBS through VMX MSR swapping doesn't | |
2765 | * provide that period, so a CPU could write host's record into | |
2766 | * guest's memory. | |
2767 | */ | |
2768 | wrmsrl(MSR_IA32_PEBS_ENABLE, 0); | |
110312c8 AK |
2769 | } |
2770 | ||
ca83b4a7 | 2771 | i = find_msr(&m->guest, msr); |
989e3992 KRW |
2772 | if (!entry_only) |
2773 | j = find_msr(&m->host, msr); | |
61d2ef2c | 2774 | |
31907093 | 2775 | if (i == NR_AUTOLOAD_MSRS || j == NR_AUTOLOAD_MSRS) { |
60266204 | 2776 | printk_once(KERN_WARNING "Not enough msr switch entries. " |
e7fc6f93 GN |
2777 | "Can't add msr %x\n", msr); |
2778 | return; | |
61d2ef2c | 2779 | } |
31907093 | 2780 | if (i < 0) { |
ca83b4a7 | 2781 | i = m->guest.nr++; |
33966dd6 | 2782 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->guest.nr); |
31907093 | 2783 | } |
989e3992 KRW |
2784 | m->guest.val[i].index = msr; |
2785 | m->guest.val[i].value = guest_val; | |
2786 | ||
2787 | if (entry_only) | |
2788 | return; | |
61d2ef2c | 2789 | |
31907093 KRW |
2790 | if (j < 0) { |
2791 | j = m->host.nr++; | |
33966dd6 | 2792 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->host.nr); |
61d2ef2c | 2793 | } |
31907093 KRW |
2794 | m->host.val[j].index = msr; |
2795 | m->host.val[j].value = host_val; | |
61d2ef2c AK |
2796 | } |
2797 | ||
92c0d900 | 2798 | static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) |
2cc51560 | 2799 | { |
844a5fe2 PB |
2800 | u64 guest_efer = vmx->vcpu.arch.efer; |
2801 | u64 ignore_bits = 0; | |
2802 | ||
2803 | if (!enable_ept) { | |
2804 | /* | |
2805 | * NX is needed to handle CR0.WP=1, CR4.SMEP=1. Testing | |
2806 | * host CPUID is more efficient than testing guest CPUID | |
2807 | * or CR4. Host SMEP is anyway a requirement for guest SMEP. | |
2808 | */ | |
2809 | if (boot_cpu_has(X86_FEATURE_SMEP)) | |
2810 | guest_efer |= EFER_NX; | |
2811 | else if (!(guest_efer & EFER_NX)) | |
2812 | ignore_bits |= EFER_NX; | |
2813 | } | |
3a34a881 | 2814 | |
51c6cf66 | 2815 | /* |
844a5fe2 | 2816 | * LMA and LME handled by hardware; SCE meaningless outside long mode. |
51c6cf66 | 2817 | */ |
844a5fe2 | 2818 | ignore_bits |= EFER_SCE; |
51c6cf66 AK |
2819 | #ifdef CONFIG_X86_64 |
2820 | ignore_bits |= EFER_LMA | EFER_LME; | |
2821 | /* SCE is meaningful only in long mode on Intel */ | |
2822 | if (guest_efer & EFER_LMA) | |
2823 | ignore_bits &= ~(u64)EFER_SCE; | |
2824 | #endif | |
84ad33ef | 2825 | |
f6577a5f AL |
2826 | /* |
2827 | * On EPT, we can't emulate NX, so we must switch EFER atomically. | |
2828 | * On CPUs that support "load IA32_EFER", always switch EFER | |
2829 | * atomically, since it's faster than switching it manually. | |
2830 | */ | |
2831 | if (cpu_has_load_ia32_efer || | |
2832 | (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX))) { | |
84ad33ef AK |
2833 | if (!(guest_efer & EFER_LMA)) |
2834 | guest_efer &= ~EFER_LME; | |
54b98bff AL |
2835 | if (guest_efer != host_efer) |
2836 | add_atomic_switch_msr(vmx, MSR_EFER, | |
989e3992 | 2837 | guest_efer, host_efer, false); |
02343cf2 SC |
2838 | else |
2839 | clear_atomic_switch_msr(vmx, MSR_EFER); | |
84ad33ef | 2840 | return false; |
844a5fe2 | 2841 | } else { |
02343cf2 SC |
2842 | clear_atomic_switch_msr(vmx, MSR_EFER); |
2843 | ||
844a5fe2 PB |
2844 | guest_efer &= ~ignore_bits; |
2845 | guest_efer |= host_efer & ignore_bits; | |
2846 | ||
2847 | vmx->guest_msrs[efer_offset].data = guest_efer; | |
2848 | vmx->guest_msrs[efer_offset].mask = ~ignore_bits; | |
84ad33ef | 2849 | |
844a5fe2 PB |
2850 | return true; |
2851 | } | |
51c6cf66 AK |
2852 | } |
2853 | ||
e28baead AL |
2854 | #ifdef CONFIG_X86_32 |
2855 | /* | |
2856 | * On 32-bit kernels, VM exits still load the FS and GS bases from the | |
2857 | * VMCS rather than the segment table. KVM uses this helper to figure | |
2858 | * out the current bases to poke them into the VMCS before entry. | |
2859 | */ | |
2d49ec72 GN |
2860 | static unsigned long segment_base(u16 selector) |
2861 | { | |
8c2e41f7 | 2862 | struct desc_struct *table; |
2d49ec72 GN |
2863 | unsigned long v; |
2864 | ||
8c2e41f7 | 2865 | if (!(selector & ~SEGMENT_RPL_MASK)) |
2d49ec72 GN |
2866 | return 0; |
2867 | ||
45fc8757 | 2868 | table = get_current_gdt_ro(); |
2d49ec72 | 2869 | |
8c2e41f7 | 2870 | if ((selector & SEGMENT_TI_MASK) == SEGMENT_LDT) { |
2d49ec72 GN |
2871 | u16 ldt_selector = kvm_read_ldt(); |
2872 | ||
8c2e41f7 | 2873 | if (!(ldt_selector & ~SEGMENT_RPL_MASK)) |
2d49ec72 GN |
2874 | return 0; |
2875 | ||
8c2e41f7 | 2876 | table = (struct desc_struct *)segment_base(ldt_selector); |
2d49ec72 | 2877 | } |
8c2e41f7 | 2878 | v = get_desc_base(&table[selector >> 3]); |
2d49ec72 GN |
2879 | return v; |
2880 | } | |
e28baead | 2881 | #endif |
2d49ec72 | 2882 | |
6d6095bd | 2883 | static void vmx_prepare_switch_to_guest(struct kvm_vcpu *vcpu) |
33ed6329 | 2884 | { |
04d2cc77 | 2885 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
d7ee039e | 2886 | struct vmcs_host_state *host_state; |
51e8a8cc | 2887 | #ifdef CONFIG_X86_64 |
35060ed6 | 2888 | int cpu = raw_smp_processor_id(); |
51e8a8cc | 2889 | #endif |
e368b875 SC |
2890 | unsigned long fs_base, gs_base; |
2891 | u16 fs_sel, gs_sel; | |
26bb0981 | 2892 | int i; |
04d2cc77 | 2893 | |
d264ee0c SC |
2894 | vmx->req_immediate_exit = false; |
2895 | ||
bd9966de | 2896 | if (vmx->loaded_cpu_state) |
33ed6329 AK |
2897 | return; |
2898 | ||
bd9966de | 2899 | vmx->loaded_cpu_state = vmx->loaded_vmcs; |
d7ee039e | 2900 | host_state = &vmx->loaded_cpu_state->host_state; |
bd9966de | 2901 | |
33ed6329 AK |
2902 | /* |
2903 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
2904 | * allow segment selectors with cpl > 0 or ti == 1. | |
2905 | */ | |
d7ee039e | 2906 | host_state->ldt_sel = kvm_read_ldt(); |
42b933b5 VK |
2907 | |
2908 | #ifdef CONFIG_X86_64 | |
d7ee039e SC |
2909 | savesegment(ds, host_state->ds_sel); |
2910 | savesegment(es, host_state->es_sel); | |
e368b875 SC |
2911 | |
2912 | gs_base = cpu_kernelmode_gs_base(cpu); | |
b062b794 VK |
2913 | if (likely(is_64bit_mm(current->mm))) { |
2914 | save_fsgs_for_kvm(); | |
e368b875 SC |
2915 | fs_sel = current->thread.fsindex; |
2916 | gs_sel = current->thread.gsindex; | |
b062b794 | 2917 | fs_base = current->thread.fsbase; |
e368b875 | 2918 | vmx->msr_host_kernel_gs_base = current->thread.gsbase; |
b062b794 | 2919 | } else { |
e368b875 SC |
2920 | savesegment(fs, fs_sel); |
2921 | savesegment(gs, gs_sel); | |
b062b794 | 2922 | fs_base = read_msr(MSR_FS_BASE); |
e368b875 | 2923 | vmx->msr_host_kernel_gs_base = read_msr(MSR_KERNEL_GS_BASE); |
33ed6329 | 2924 | } |
b2da15ac | 2925 | |
4679b61f | 2926 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
4fde8d57 | 2927 | #else |
e368b875 SC |
2928 | savesegment(fs, fs_sel); |
2929 | savesegment(gs, gs_sel); | |
2930 | fs_base = segment_base(fs_sel); | |
2931 | gs_base = segment_base(gs_sel); | |
707c0874 | 2932 | #endif |
e368b875 | 2933 | |
8f21a0bb SC |
2934 | if (unlikely(fs_sel != host_state->fs_sel)) { |
2935 | if (!(fs_sel & 7)) | |
2936 | vmcs_write16(HOST_FS_SELECTOR, fs_sel); | |
2937 | else | |
2938 | vmcs_write16(HOST_FS_SELECTOR, 0); | |
2939 | host_state->fs_sel = fs_sel; | |
2940 | } | |
2941 | if (unlikely(gs_sel != host_state->gs_sel)) { | |
2942 | if (!(gs_sel & 7)) | |
2943 | vmcs_write16(HOST_GS_SELECTOR, gs_sel); | |
2944 | else | |
2945 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
2946 | host_state->gs_sel = gs_sel; | |
2947 | } | |
5e079c7e SC |
2948 | if (unlikely(fs_base != host_state->fs_base)) { |
2949 | vmcs_writel(HOST_FS_BASE, fs_base); | |
2950 | host_state->fs_base = fs_base; | |
2951 | } | |
2952 | if (unlikely(gs_base != host_state->gs_base)) { | |
2953 | vmcs_writel(HOST_GS_BASE, gs_base); | |
2954 | host_state->gs_base = gs_base; | |
2955 | } | |
707c0874 | 2956 | |
26bb0981 AK |
2957 | for (i = 0; i < vmx->save_nmsrs; ++i) |
2958 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
d5696725 AK |
2959 | vmx->guest_msrs[i].data, |
2960 | vmx->guest_msrs[i].mask); | |
33ed6329 AK |
2961 | } |
2962 | ||
6d6095bd | 2963 | static void vmx_prepare_switch_to_host(struct vcpu_vmx *vmx) |
33ed6329 | 2964 | { |
d7ee039e SC |
2965 | struct vmcs_host_state *host_state; |
2966 | ||
bd9966de | 2967 | if (!vmx->loaded_cpu_state) |
33ed6329 AK |
2968 | return; |
2969 | ||
bd9966de | 2970 | WARN_ON_ONCE(vmx->loaded_cpu_state != vmx->loaded_vmcs); |
d7ee039e | 2971 | host_state = &vmx->loaded_cpu_state->host_state; |
bd9966de | 2972 | |
e1beb1d3 | 2973 | ++vmx->vcpu.stat.host_state_reload; |
bd9966de SC |
2974 | vmx->loaded_cpu_state = NULL; |
2975 | ||
c8770e7b | 2976 | #ifdef CONFIG_X86_64 |
4679b61f | 2977 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
c8770e7b | 2978 | #endif |
d7ee039e SC |
2979 | if (host_state->ldt_sel || (host_state->gs_sel & 7)) { |
2980 | kvm_load_ldt(host_state->ldt_sel); | |
33ed6329 | 2981 | #ifdef CONFIG_X86_64 |
d7ee039e | 2982 | load_gs_index(host_state->gs_sel); |
9581d442 | 2983 | #else |
d7ee039e | 2984 | loadsegment(gs, host_state->gs_sel); |
33ed6329 | 2985 | #endif |
33ed6329 | 2986 | } |
d7ee039e SC |
2987 | if (host_state->fs_sel & 7) |
2988 | loadsegment(fs, host_state->fs_sel); | |
b2da15ac | 2989 | #ifdef CONFIG_X86_64 |
d7ee039e SC |
2990 | if (unlikely(host_state->ds_sel | host_state->es_sel)) { |
2991 | loadsegment(ds, host_state->ds_sel); | |
2992 | loadsegment(es, host_state->es_sel); | |
b2da15ac | 2993 | } |
b2da15ac | 2994 | #endif |
b7ffc44d | 2995 | invalidate_tss_limit(); |
44ea2b17 | 2996 | #ifdef CONFIG_X86_64 |
c8770e7b | 2997 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
44ea2b17 | 2998 | #endif |
45fc8757 | 2999 | load_fixmap_gdt(raw_smp_processor_id()); |
33ed6329 AK |
3000 | } |
3001 | ||
678e315e SC |
3002 | #ifdef CONFIG_X86_64 |
3003 | static u64 vmx_read_guest_kernel_gs_base(struct vcpu_vmx *vmx) | |
a9b21b62 | 3004 | { |
4679b61f PB |
3005 | preempt_disable(); |
3006 | if (vmx->loaded_cpu_state) | |
3007 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
3008 | preempt_enable(); | |
678e315e | 3009 | return vmx->msr_guest_kernel_gs_base; |
a9b21b62 AK |
3010 | } |
3011 | ||
678e315e SC |
3012 | static void vmx_write_guest_kernel_gs_base(struct vcpu_vmx *vmx, u64 data) |
3013 | { | |
4679b61f PB |
3014 | preempt_disable(); |
3015 | if (vmx->loaded_cpu_state) | |
3016 | wrmsrl(MSR_KERNEL_GS_BASE, data); | |
3017 | preempt_enable(); | |
678e315e SC |
3018 | vmx->msr_guest_kernel_gs_base = data; |
3019 | } | |
3020 | #endif | |
3021 | ||
28b835d6 FW |
3022 | static void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu) |
3023 | { | |
3024 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
3025 | struct pi_desc old, new; | |
3026 | unsigned int dest; | |
3027 | ||
31afb2ea PB |
3028 | /* |
3029 | * In case of hot-plug or hot-unplug, we may have to undo | |
3030 | * vmx_vcpu_pi_put even if there is no assigned device. And we | |
3031 | * always keep PI.NDST up to date for simplicity: it makes the | |
3032 | * code easier, and CPU migration is not a fast path. | |
3033 | */ | |
3034 | if (!pi_test_sn(pi_desc) && vcpu->cpu == cpu) | |
28b835d6 FW |
3035 | return; |
3036 | ||
31afb2ea PB |
3037 | /* |
3038 | * First handle the simple case where no cmpxchg is necessary; just | |
3039 | * allow posting non-urgent interrupts. | |
3040 | * | |
3041 | * If the 'nv' field is POSTED_INTR_WAKEUP_VECTOR, do not change | |
3042 | * PI.NDST: pi_post_block will do it for us and the wakeup_handler | |
3043 | * expects the VCPU to be on the blocked_vcpu_list that matches | |
3044 | * PI.NDST. | |
3045 | */ | |
3046 | if (pi_desc->nv == POSTED_INTR_WAKEUP_VECTOR || | |
3047 | vcpu->cpu == cpu) { | |
3048 | pi_clear_sn(pi_desc); | |
28b835d6 | 3049 | return; |
31afb2ea | 3050 | } |
28b835d6 | 3051 | |
31afb2ea | 3052 | /* The full case. */ |
28b835d6 FW |
3053 | do { |
3054 | old.control = new.control = pi_desc->control; | |
3055 | ||
31afb2ea | 3056 | dest = cpu_physical_id(cpu); |
28b835d6 | 3057 | |
31afb2ea PB |
3058 | if (x2apic_enabled()) |
3059 | new.ndst = dest; | |
3060 | else | |
3061 | new.ndst = (dest << 8) & 0xFF00; | |
28b835d6 | 3062 | |
28b835d6 | 3063 | new.sn = 0; |
c0a1666b PB |
3064 | } while (cmpxchg64(&pi_desc->control, old.control, |
3065 | new.control) != old.control); | |
28b835d6 | 3066 | } |
1be0e61c | 3067 | |
c95ba92a PF |
3068 | static void decache_tsc_multiplier(struct vcpu_vmx *vmx) |
3069 | { | |
3070 | vmx->current_tsc_ratio = vmx->vcpu.arch.tsc_scaling_ratio; | |
3071 | vmcs_write64(TSC_MULTIPLIER, vmx->current_tsc_ratio); | |
3072 | } | |
3073 | ||
6aa8b732 AK |
3074 | /* |
3075 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
3076 | * vcpu mutex is already taken. | |
3077 | */ | |
15ad7146 | 3078 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 3079 | { |
a2fa3e9f | 3080 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
b80c76ec | 3081 | bool already_loaded = vmx->loaded_vmcs->cpu == cpu; |
6aa8b732 | 3082 | |
b80c76ec | 3083 | if (!already_loaded) { |
fe0e80be | 3084 | loaded_vmcs_clear(vmx->loaded_vmcs); |
92fe13be | 3085 | local_irq_disable(); |
8f536b76 | 3086 | crash_disable_local_vmclear(cpu); |
5a560f8b XG |
3087 | |
3088 | /* | |
3089 | * Read loaded_vmcs->cpu should be before fetching | |
3090 | * loaded_vmcs->loaded_vmcss_on_cpu_link. | |
3091 | * See the comments in __loaded_vmcs_clear(). | |
3092 | */ | |
3093 | smp_rmb(); | |
3094 | ||
d462b819 NHE |
3095 | list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link, |
3096 | &per_cpu(loaded_vmcss_on_cpu, cpu)); | |
8f536b76 | 3097 | crash_enable_local_vmclear(cpu); |
92fe13be | 3098 | local_irq_enable(); |
b80c76ec JM |
3099 | } |
3100 | ||
3101 | if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) { | |
3102 | per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs; | |
3103 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
15d45071 | 3104 | indirect_branch_prediction_barrier(); |
b80c76ec JM |
3105 | } |
3106 | ||
3107 | if (!already_loaded) { | |
59c58ceb | 3108 | void *gdt = get_current_gdt_ro(); |
b80c76ec JM |
3109 | unsigned long sysenter_esp; |
3110 | ||
3111 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
92fe13be | 3112 | |
6aa8b732 AK |
3113 | /* |
3114 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
e0c23063 | 3115 | * processors. See 22.2.4. |
6aa8b732 | 3116 | */ |
e0c23063 | 3117 | vmcs_writel(HOST_TR_BASE, |
72f5e08d | 3118 | (unsigned long)&get_cpu_entry_area(cpu)->tss.x86_tss); |
59c58ceb | 3119 | vmcs_writel(HOST_GDTR_BASE, (unsigned long)gdt); /* 22.2.4 */ |
6aa8b732 | 3120 | |
b7ffc44d AL |
3121 | /* |
3122 | * VM exits change the host TR limit to 0x67 after a VM | |
3123 | * exit. This is okay, since 0x67 covers everything except | |
3124 | * the IO bitmap and have have code to handle the IO bitmap | |
3125 | * being lost after a VM exit. | |
3126 | */ | |
3127 | BUILD_BUG_ON(IO_BITMAP_OFFSET - 1 != 0x67); | |
3128 | ||
6aa8b732 AK |
3129 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); |
3130 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
ff2c3a18 | 3131 | |
d462b819 | 3132 | vmx->loaded_vmcs->cpu = cpu; |
6aa8b732 | 3133 | } |
28b835d6 | 3134 | |
2680d6da OH |
3135 | /* Setup TSC multiplier */ |
3136 | if (kvm_has_tsc_control && | |
c95ba92a PF |
3137 | vmx->current_tsc_ratio != vcpu->arch.tsc_scaling_ratio) |
3138 | decache_tsc_multiplier(vmx); | |
2680d6da | 3139 | |
28b835d6 | 3140 | vmx_vcpu_pi_load(vcpu, cpu); |
1be0e61c | 3141 | vmx->host_pkru = read_pkru(); |
74c55931 | 3142 | vmx->host_debugctlmsr = get_debugctlmsr(); |
28b835d6 FW |
3143 | } |
3144 | ||
3145 | static void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu) | |
3146 | { | |
3147 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
3148 | ||
3149 | if (!kvm_arch_has_assigned_device(vcpu->kvm) || | |
a0052191 YZ |
3150 | !irq_remapping_cap(IRQ_POSTING_CAP) || |
3151 | !kvm_vcpu_apicv_active(vcpu)) | |
28b835d6 FW |
3152 | return; |
3153 | ||
3154 | /* Set SN when the vCPU is preempted */ | |
3155 | if (vcpu->preempted) | |
3156 | pi_set_sn(pi_desc); | |
6aa8b732 AK |
3157 | } |
3158 | ||
3159 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
3160 | { | |
28b835d6 FW |
3161 | vmx_vcpu_pi_put(vcpu); |
3162 | ||
6d6095bd | 3163 | vmx_prepare_switch_to_host(to_vmx(vcpu)); |
6aa8b732 AK |
3164 | } |
3165 | ||
f244deed WL |
3166 | static bool emulation_required(struct kvm_vcpu *vcpu) |
3167 | { | |
3168 | return emulate_invalid_guest_state && !guest_state_valid(vcpu); | |
3169 | } | |
3170 | ||
edcafe3c AK |
3171 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu); |
3172 | ||
fe3ef05c NHE |
3173 | /* |
3174 | * Return the cr0 value that a nested guest would read. This is a combination | |
3175 | * of the real cr0 used to run the guest (guest_cr0), and the bits shadowed by | |
3176 | * its hypervisor (cr0_read_shadow). | |
3177 | */ | |
3178 | static inline unsigned long nested_read_cr0(struct vmcs12 *fields) | |
3179 | { | |
3180 | return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) | | |
3181 | (fields->cr0_read_shadow & fields->cr0_guest_host_mask); | |
3182 | } | |
3183 | static inline unsigned long nested_read_cr4(struct vmcs12 *fields) | |
3184 | { | |
3185 | return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) | | |
3186 | (fields->cr4_read_shadow & fields->cr4_guest_host_mask); | |
3187 | } | |
3188 | ||
6aa8b732 AK |
3189 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
3190 | { | |
78ac8b47 | 3191 | unsigned long rflags, save_rflags; |
345dcaa8 | 3192 | |
6de12732 AK |
3193 | if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) { |
3194 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); | |
3195 | rflags = vmcs_readl(GUEST_RFLAGS); | |
3196 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
3197 | rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS; | |
3198 | save_rflags = to_vmx(vcpu)->rmode.save_rflags; | |
3199 | rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
3200 | } | |
3201 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 | 3202 | } |
6de12732 | 3203 | return to_vmx(vcpu)->rflags; |
6aa8b732 AK |
3204 | } |
3205 | ||
3206 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
3207 | { | |
f244deed WL |
3208 | unsigned long old_rflags = vmx_get_rflags(vcpu); |
3209 | ||
6de12732 AK |
3210 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); |
3211 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 AK |
3212 | if (to_vmx(vcpu)->rmode.vm86_active) { |
3213 | to_vmx(vcpu)->rmode.save_rflags = rflags; | |
053de044 | 3214 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
78ac8b47 | 3215 | } |
6aa8b732 | 3216 | vmcs_writel(GUEST_RFLAGS, rflags); |
f244deed WL |
3217 | |
3218 | if ((old_rflags ^ to_vmx(vcpu)->rflags) & X86_EFLAGS_VM) | |
3219 | to_vmx(vcpu)->emulation_required = emulation_required(vcpu); | |
6aa8b732 AK |
3220 | } |
3221 | ||
37ccdcbe | 3222 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu) |
2809f5d2 GC |
3223 | { |
3224 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
3225 | int ret = 0; | |
3226 | ||
3227 | if (interruptibility & GUEST_INTR_STATE_STI) | |
48005f64 | 3228 | ret |= KVM_X86_SHADOW_INT_STI; |
2809f5d2 | 3229 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) |
48005f64 | 3230 | ret |= KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 | 3231 | |
37ccdcbe | 3232 | return ret; |
2809f5d2 GC |
3233 | } |
3234 | ||
3235 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
3236 | { | |
3237 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
3238 | u32 interruptibility = interruptibility_old; | |
3239 | ||
3240 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
3241 | ||
48005f64 | 3242 | if (mask & KVM_X86_SHADOW_INT_MOV_SS) |
2809f5d2 | 3243 | interruptibility |= GUEST_INTR_STATE_MOV_SS; |
48005f64 | 3244 | else if (mask & KVM_X86_SHADOW_INT_STI) |
2809f5d2 GC |
3245 | interruptibility |= GUEST_INTR_STATE_STI; |
3246 | ||
3247 | if ((interruptibility != interruptibility_old)) | |
3248 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
3249 | } | |
3250 | ||
6aa8b732 AK |
3251 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
3252 | { | |
3253 | unsigned long rip; | |
6aa8b732 | 3254 | |
5fdbf976 | 3255 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 3256 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 3257 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 3258 | |
2809f5d2 GC |
3259 | /* skipping an emulated instruction also counts */ |
3260 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
3261 | } |
3262 | ||
b96fb439 PB |
3263 | static void nested_vmx_inject_exception_vmexit(struct kvm_vcpu *vcpu, |
3264 | unsigned long exit_qual) | |
3265 | { | |
3266 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
3267 | unsigned int nr = vcpu->arch.exception.nr; | |
3268 | u32 intr_info = nr | INTR_INFO_VALID_MASK; | |
3269 | ||
3270 | if (vcpu->arch.exception.has_error_code) { | |
3271 | vmcs12->vm_exit_intr_error_code = vcpu->arch.exception.error_code; | |
3272 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; | |
3273 | } | |
3274 | ||
3275 | if (kvm_exception_is_soft(nr)) | |
3276 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; | |
3277 | else | |
3278 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
3279 | ||
3280 | if (!(vmcs12->idt_vectoring_info_field & VECTORING_INFO_VALID_MASK) && | |
3281 | vmx_get_nmi_mask(vcpu)) | |
3282 | intr_info |= INTR_INFO_UNBLOCK_NMI; | |
3283 | ||
3284 | nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, intr_info, exit_qual); | |
3285 | } | |
3286 | ||
0b6ac343 NHE |
3287 | /* |
3288 | * KVM wants to inject page-faults which it got to the guest. This function | |
3289 | * checks whether in a nested guest, we need to inject them to L1 or L2. | |
0b6ac343 | 3290 | */ |
bfcf83b1 | 3291 | static int nested_vmx_check_exception(struct kvm_vcpu *vcpu, unsigned long *exit_qual) |
0b6ac343 NHE |
3292 | { |
3293 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
adfe20fb | 3294 | unsigned int nr = vcpu->arch.exception.nr; |
da998b46 JM |
3295 | bool has_payload = vcpu->arch.exception.has_payload; |
3296 | unsigned long payload = vcpu->arch.exception.payload; | |
0b6ac343 | 3297 | |
b96fb439 PB |
3298 | if (nr == PF_VECTOR) { |
3299 | if (vcpu->arch.exception.nested_apf) { | |
bfcf83b1 | 3300 | *exit_qual = vcpu->arch.apf.nested_apf_token; |
b96fb439 PB |
3301 | return 1; |
3302 | } | |
b96fb439 PB |
3303 | if (nested_vmx_is_page_fault_vmexit(vmcs12, |
3304 | vcpu->arch.exception.error_code)) { | |
da998b46 | 3305 | *exit_qual = has_payload ? payload : vcpu->arch.cr2; |
b96fb439 PB |
3306 | return 1; |
3307 | } | |
f10c729f JM |
3308 | } else if (vmcs12->exception_bitmap & (1u << nr)) { |
3309 | if (nr == DB_VECTOR) { | |
3310 | if (!has_payload) { | |
3311 | payload = vcpu->arch.dr6; | |
3312 | payload &= ~(DR6_FIXED_1 | DR6_BT); | |
3313 | payload ^= DR6_RTM; | |
cfb634fe | 3314 | } |
f10c729f JM |
3315 | *exit_qual = payload; |
3316 | } else | |
3317 | *exit_qual = 0; | |
3318 | return 1; | |
adfe20fb WL |
3319 | } |
3320 | ||
b96fb439 | 3321 | return 0; |
0b6ac343 NHE |
3322 | } |
3323 | ||
caa057a2 WL |
3324 | static void vmx_clear_hlt(struct kvm_vcpu *vcpu) |
3325 | { | |
3326 | /* | |
3327 | * Ensure that we clear the HLT state in the VMCS. We don't need to | |
3328 | * explicitly skip the instruction because if the HLT state is set, | |
3329 | * then the instruction is already executing and RIP has already been | |
3330 | * advanced. | |
3331 | */ | |
3332 | if (kvm_hlt_in_guest(vcpu->kvm) && | |
3333 | vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT) | |
3334 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); | |
3335 | } | |
3336 | ||
cfcd20e5 | 3337 | static void vmx_queue_exception(struct kvm_vcpu *vcpu) |
298101da | 3338 | { |
77ab6db0 | 3339 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
cfcd20e5 WL |
3340 | unsigned nr = vcpu->arch.exception.nr; |
3341 | bool has_error_code = vcpu->arch.exception.has_error_code; | |
cfcd20e5 | 3342 | u32 error_code = vcpu->arch.exception.error_code; |
8ab2d2e2 | 3343 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 3344 | |
da998b46 JM |
3345 | kvm_deliver_exception_payload(vcpu); |
3346 | ||
8ab2d2e2 | 3347 | if (has_error_code) { |
77ab6db0 | 3348 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
3349 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
3350 | } | |
77ab6db0 | 3351 | |
7ffd92c5 | 3352 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
3353 | int inc_eip = 0; |
3354 | if (kvm_exception_is_soft(nr)) | |
3355 | inc_eip = vcpu->arch.event_exit_inst_len; | |
3356 | if (kvm_inject_realmode_interrupt(vcpu, nr, inc_eip) != EMULATE_DONE) | |
a92601bb | 3357 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
77ab6db0 JK |
3358 | return; |
3359 | } | |
3360 | ||
add5ff7a SC |
3361 | WARN_ON_ONCE(vmx->emulation_required); |
3362 | ||
66fd3f7f GN |
3363 | if (kvm_exception_is_soft(nr)) { |
3364 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
3365 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
3366 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
3367 | } else | |
3368 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
3369 | ||
3370 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
caa057a2 WL |
3371 | |
3372 | vmx_clear_hlt(vcpu); | |
298101da AK |
3373 | } |
3374 | ||
4e47c7a6 SY |
3375 | static bool vmx_rdtscp_supported(void) |
3376 | { | |
3377 | return cpu_has_vmx_rdtscp(); | |
3378 | } | |
3379 | ||
ad756a16 MJ |
3380 | static bool vmx_invpcid_supported(void) |
3381 | { | |
eb4b248e | 3382 | return cpu_has_vmx_invpcid(); |
ad756a16 MJ |
3383 | } |
3384 | ||
a75beee6 ED |
3385 | /* |
3386 | * Swap MSR entry in host/guest MSR entry array. | |
3387 | */ | |
8b9cf98c | 3388 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 3389 | { |
26bb0981 | 3390 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
3391 | |
3392 | tmp = vmx->guest_msrs[to]; | |
3393 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
3394 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
3395 | } |
3396 | ||
e38aea3e AK |
3397 | /* |
3398 | * Set up the vmcs to automatically save and restore system | |
3399 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
3400 | * mode, as fiddling with msrs is very expensive. | |
3401 | */ | |
8b9cf98c | 3402 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 3403 | { |
26bb0981 | 3404 | int save_nmsrs, index; |
e38aea3e | 3405 | |
a75beee6 ED |
3406 | save_nmsrs = 0; |
3407 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 3408 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 3409 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 3410 | if (index >= 0) |
8b9cf98c RR |
3411 | move_msr_up(vmx, index, save_nmsrs++); |
3412 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 3413 | if (index >= 0) |
8b9cf98c RR |
3414 | move_msr_up(vmx, index, save_nmsrs++); |
3415 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 3416 | if (index >= 0) |
8b9cf98c | 3417 | move_msr_up(vmx, index, save_nmsrs++); |
4e47c7a6 | 3418 | index = __find_msr_index(vmx, MSR_TSC_AUX); |
d6321d49 | 3419 | if (index >= 0 && guest_cpuid_has(&vmx->vcpu, X86_FEATURE_RDTSCP)) |
4e47c7a6 | 3420 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 | 3421 | /* |
8c06585d | 3422 | * MSR_STAR is only needed on long mode guests, and only |
a75beee6 ED |
3423 | * if efer.sce is enabled. |
3424 | */ | |
8c06585d | 3425 | index = __find_msr_index(vmx, MSR_STAR); |
f6801dff | 3426 | if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE)) |
8b9cf98c | 3427 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
3428 | } |
3429 | #endif | |
92c0d900 AK |
3430 | index = __find_msr_index(vmx, MSR_EFER); |
3431 | if (index >= 0 && update_transition_efer(vmx, index)) | |
26bb0981 | 3432 | move_msr_up(vmx, index, save_nmsrs++); |
e38aea3e | 3433 | |
26bb0981 | 3434 | vmx->save_nmsrs = save_nmsrs; |
5897297b | 3435 | |
8d14695f | 3436 | if (cpu_has_vmx_msr_bitmap()) |
904e14fb | 3437 | vmx_update_msr_bitmap(&vmx->vcpu); |
e38aea3e AK |
3438 | } |
3439 | ||
e79f245d | 3440 | static u64 vmx_read_l1_tsc_offset(struct kvm_vcpu *vcpu) |
6aa8b732 | 3441 | { |
e79f245d | 3442 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
6aa8b732 | 3443 | |
e79f245d KA |
3444 | if (is_guest_mode(vcpu) && |
3445 | (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)) | |
3446 | return vcpu->arch.tsc_offset - vmcs12->tsc_offset; | |
3447 | ||
3448 | return vcpu->arch.tsc_offset; | |
6aa8b732 AK |
3449 | } |
3450 | ||
3451 | /* | |
99e3e30a | 3452 | * writes 'offset' into guest's timestamp counter offset register |
6aa8b732 | 3453 | */ |
99e3e30a | 3454 | static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
6aa8b732 | 3455 | { |
27fc51b2 | 3456 | if (is_guest_mode(vcpu)) { |
7991825b | 3457 | /* |
27fc51b2 NHE |
3458 | * We're here if L1 chose not to trap WRMSR to TSC. According |
3459 | * to the spec, this should set L1's TSC; The offset that L1 | |
3460 | * set for L2 remains unchanged, and still needs to be added | |
3461 | * to the newly set TSC to get L2's TSC. | |
7991825b | 3462 | */ |
27fc51b2 | 3463 | struct vmcs12 *vmcs12; |
27fc51b2 NHE |
3464 | /* recalculate vmcs02.TSC_OFFSET: */ |
3465 | vmcs12 = get_vmcs12(vcpu); | |
3466 | vmcs_write64(TSC_OFFSET, offset + | |
3467 | (nested_cpu_has(vmcs12, CPU_BASED_USE_TSC_OFFSETING) ? | |
3468 | vmcs12->tsc_offset : 0)); | |
3469 | } else { | |
489223ed YY |
3470 | trace_kvm_write_tsc_offset(vcpu->vcpu_id, |
3471 | vmcs_read64(TSC_OFFSET), offset); | |
27fc51b2 NHE |
3472 | vmcs_write64(TSC_OFFSET, offset); |
3473 | } | |
6aa8b732 AK |
3474 | } |
3475 | ||
801d3424 NHE |
3476 | /* |
3477 | * nested_vmx_allowed() checks whether a guest should be allowed to use VMX | |
3478 | * instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for | |
3479 | * all guests if the "nested" module option is off, and can also be disabled | |
3480 | * for a single guest by disabling its VMX cpuid bit. | |
3481 | */ | |
3482 | static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu) | |
3483 | { | |
d6321d49 | 3484 | return nested && guest_cpuid_has(vcpu, X86_FEATURE_VMX); |
801d3424 NHE |
3485 | } |
3486 | ||
b87a51ae NHE |
3487 | /* |
3488 | * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be | |
3489 | * returned for the various VMX controls MSRs when nested VMX is enabled. | |
3490 | * The same values should also be used to verify that vmcs12 control fields are | |
3491 | * valid during nested entry from L1 to L2. | |
3492 | * Each of these control msrs has a low and high 32-bit half: A low bit is on | |
3493 | * if the corresponding bit in the (32-bit) control field *must* be on, and a | |
3494 | * bit in the high half is on if the corresponding bit in the control field | |
3495 | * may be on. See also vmx_control_verify(). | |
b87a51ae | 3496 | */ |
6677f3da | 3497 | static void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs *msrs, bool apicv) |
b87a51ae | 3498 | { |
1389309c PB |
3499 | if (!nested) { |
3500 | memset(msrs, 0, sizeof(*msrs)); | |
3501 | return; | |
3502 | } | |
3503 | ||
b87a51ae NHE |
3504 | /* |
3505 | * Note that as a general rule, the high half of the MSRs (bits in | |
3506 | * the control fields which may be 1) should be initialized by the | |
3507 | * intersection of the underlying hardware's MSR (i.e., features which | |
3508 | * can be supported) and the list of features we want to expose - | |
3509 | * because they are known to be properly supported in our code. | |
3510 | * Also, usually, the low half of the MSRs (bits which must be 1) can | |
3511 | * be set to 0, meaning that L1 may turn off any of these bits. The | |
3512 | * reason is that if one of these bits is necessary, it will appear | |
3513 | * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control | |
3514 | * fields of vmcs01 and vmcs02, will turn these bits off - and | |
7313c698 | 3515 | * nested_vmx_exit_reflected() will not pass related exits to L1. |
b87a51ae NHE |
3516 | * These rules have exceptions below. |
3517 | */ | |
3518 | ||
3519 | /* pin-based controls */ | |
eabeaacc | 3520 | rdmsr(MSR_IA32_VMX_PINBASED_CTLS, |
6677f3da PB |
3521 | msrs->pinbased_ctls_low, |
3522 | msrs->pinbased_ctls_high); | |
3523 | msrs->pinbased_ctls_low |= | |
b9c237bb | 3524 | PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR; |
6677f3da | 3525 | msrs->pinbased_ctls_high &= |
b9c237bb WV |
3526 | PIN_BASED_EXT_INTR_MASK | |
3527 | PIN_BASED_NMI_EXITING | | |
1389309c PB |
3528 | PIN_BASED_VIRTUAL_NMIS | |
3529 | (apicv ? PIN_BASED_POSTED_INTR : 0); | |
6677f3da | 3530 | msrs->pinbased_ctls_high |= |
b9c237bb | 3531 | PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR | |
0238ea91 | 3532 | PIN_BASED_VMX_PREEMPTION_TIMER; |
b87a51ae | 3533 | |
3dbcd8da | 3534 | /* exit controls */ |
c0dfee58 | 3535 | rdmsr(MSR_IA32_VMX_EXIT_CTLS, |
6677f3da PB |
3536 | msrs->exit_ctls_low, |
3537 | msrs->exit_ctls_high); | |
3538 | msrs->exit_ctls_low = | |
b9c237bb | 3539 | VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR; |
e0ba1a6f | 3540 | |
6677f3da | 3541 | msrs->exit_ctls_high &= |
b87a51ae | 3542 | #ifdef CONFIG_X86_64 |
c0dfee58 | 3543 | VM_EXIT_HOST_ADDR_SPACE_SIZE | |
b87a51ae | 3544 | #endif |
f4124500 | 3545 | VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT; |
6677f3da | 3546 | msrs->exit_ctls_high |= |
b9c237bb | 3547 | VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR | |
f4124500 | 3548 | VM_EXIT_LOAD_IA32_EFER | VM_EXIT_SAVE_IA32_EFER | |
e0ba1a6f BD |
3549 | VM_EXIT_SAVE_VMX_PREEMPTION_TIMER | VM_EXIT_ACK_INTR_ON_EXIT; |
3550 | ||
2996fca0 | 3551 | /* We support free control of debug control saving. */ |
6677f3da | 3552 | msrs->exit_ctls_low &= ~VM_EXIT_SAVE_DEBUG_CONTROLS; |
2996fca0 | 3553 | |
b87a51ae NHE |
3554 | /* entry controls */ |
3555 | rdmsr(MSR_IA32_VMX_ENTRY_CTLS, | |
6677f3da PB |
3556 | msrs->entry_ctls_low, |
3557 | msrs->entry_ctls_high); | |
3558 | msrs->entry_ctls_low = | |
b9c237bb | 3559 | VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR; |
6677f3da | 3560 | msrs->entry_ctls_high &= |
57435349 JK |
3561 | #ifdef CONFIG_X86_64 |
3562 | VM_ENTRY_IA32E_MODE | | |
3563 | #endif | |
3564 | VM_ENTRY_LOAD_IA32_PAT; | |
6677f3da | 3565 | msrs->entry_ctls_high |= |
b9c237bb | 3566 | (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER); |
57435349 | 3567 | |
2996fca0 | 3568 | /* We support free control of debug control loading. */ |
6677f3da | 3569 | msrs->entry_ctls_low &= ~VM_ENTRY_LOAD_DEBUG_CONTROLS; |
2996fca0 | 3570 | |
b87a51ae NHE |
3571 | /* cpu-based controls */ |
3572 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, | |
6677f3da PB |
3573 | msrs->procbased_ctls_low, |
3574 | msrs->procbased_ctls_high); | |
3575 | msrs->procbased_ctls_low = | |
b9c237bb | 3576 | CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR; |
6677f3da | 3577 | msrs->procbased_ctls_high &= |
a294c9bb JK |
3578 | CPU_BASED_VIRTUAL_INTR_PENDING | |
3579 | CPU_BASED_VIRTUAL_NMI_PENDING | CPU_BASED_USE_TSC_OFFSETING | | |
b87a51ae NHE |
3580 | CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING | |
3581 | CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING | | |
3582 | CPU_BASED_CR3_STORE_EXITING | | |
3583 | #ifdef CONFIG_X86_64 | |
3584 | CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING | | |
3585 | #endif | |
3586 | CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING | | |
5f3d45e7 MD |
3587 | CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_TRAP_FLAG | |
3588 | CPU_BASED_MONITOR_EXITING | CPU_BASED_RDPMC_EXITING | | |
3589 | CPU_BASED_RDTSC_EXITING | CPU_BASED_PAUSE_EXITING | | |
3590 | CPU_BASED_TPR_SHADOW | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
b87a51ae NHE |
3591 | /* |
3592 | * We can allow some features even when not supported by the | |
3593 | * hardware. For example, L1 can specify an MSR bitmap - and we | |
3594 | * can use it to avoid exits to L1 - even when L0 runs L2 | |
3595 | * without MSR bitmaps. | |
3596 | */ | |
6677f3da | 3597 | msrs->procbased_ctls_high |= |
b9c237bb | 3598 | CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR | |
560b7ee1 | 3599 | CPU_BASED_USE_MSR_BITMAPS; |
b87a51ae | 3600 | |
3dcdf3ec | 3601 | /* We support free control of CR3 access interception. */ |
6677f3da | 3602 | msrs->procbased_ctls_low &= |
3dcdf3ec JK |
3603 | ~(CPU_BASED_CR3_LOAD_EXITING | CPU_BASED_CR3_STORE_EXITING); |
3604 | ||
80154d77 PB |
3605 | /* |
3606 | * secondary cpu-based controls. Do not include those that | |
3607 | * depend on CPUID bits, they are added later by vmx_cpuid_update. | |
3608 | */ | |
b87a51ae | 3609 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2, |
6677f3da PB |
3610 | msrs->secondary_ctls_low, |
3611 | msrs->secondary_ctls_high); | |
3612 | msrs->secondary_ctls_low = 0; | |
3613 | msrs->secondary_ctls_high &= | |
1b07304c | 3614 | SECONDARY_EXEC_DESC | |
f2b93280 | 3615 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
82f0dd4b | 3616 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
608406e2 | 3617 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | |
3db13480 | 3618 | SECONDARY_EXEC_WBINVD_EXITING; |
2cf7ea9f | 3619 | |
32c7acf0 LA |
3620 | /* |
3621 | * We can emulate "VMCS shadowing," even if the hardware | |
3622 | * doesn't support it. | |
3623 | */ | |
3624 | msrs->secondary_ctls_high |= | |
3625 | SECONDARY_EXEC_SHADOW_VMCS; | |
c18911a2 | 3626 | |
afa61f75 NHE |
3627 | if (enable_ept) { |
3628 | /* nested EPT: emulate EPT also to L1 */ | |
6677f3da | 3629 | msrs->secondary_ctls_high |= |
0790ec17 | 3630 | SECONDARY_EXEC_ENABLE_EPT; |
6677f3da | 3631 | msrs->ept_caps = VMX_EPT_PAGE_WALK_4_BIT | |
7db74265 | 3632 | VMX_EPTP_WB_BIT | VMX_EPT_INVEPT_BIT; |
02120c45 | 3633 | if (cpu_has_vmx_ept_execute_only()) |
6677f3da | 3634 | msrs->ept_caps |= |
02120c45 | 3635 | VMX_EPT_EXECUTE_ONLY_BIT; |
6677f3da PB |
3636 | msrs->ept_caps &= vmx_capability.ept; |
3637 | msrs->ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT | | |
7db74265 PB |
3638 | VMX_EPT_EXTENT_CONTEXT_BIT | VMX_EPT_2MB_PAGE_BIT | |
3639 | VMX_EPT_1GB_PAGE_BIT; | |
03efce6f | 3640 | if (enable_ept_ad_bits) { |
6677f3da | 3641 | msrs->secondary_ctls_high |= |
03efce6f | 3642 | SECONDARY_EXEC_ENABLE_PML; |
6677f3da | 3643 | msrs->ept_caps |= VMX_EPT_AD_BIT; |
03efce6f | 3644 | } |
1c13bffd | 3645 | } |
afa61f75 | 3646 | |
27c42a1b | 3647 | if (cpu_has_vmx_vmfunc()) { |
6677f3da | 3648 | msrs->secondary_ctls_high |= |
27c42a1b | 3649 | SECONDARY_EXEC_ENABLE_VMFUNC; |
41ab9372 BD |
3650 | /* |
3651 | * Advertise EPTP switching unconditionally | |
3652 | * since we emulate it | |
3653 | */ | |
575b3a2c | 3654 | if (enable_ept) |
6677f3da | 3655 | msrs->vmfunc_controls = |
575b3a2c | 3656 | VMX_VMFUNC_EPTP_SWITCHING; |
27c42a1b BD |
3657 | } |
3658 | ||
ef697a71 PB |
3659 | /* |
3660 | * Old versions of KVM use the single-context version without | |
3661 | * checking for support, so declare that it is supported even | |
3662 | * though it is treated as global context. The alternative is | |
3663 | * not failing the single-context invvpid, and it is worse. | |
3664 | */ | |
63cb6d5f | 3665 | if (enable_vpid) { |
6677f3da | 3666 | msrs->secondary_ctls_high |= |
63cb6d5f | 3667 | SECONDARY_EXEC_ENABLE_VPID; |
6677f3da | 3668 | msrs->vpid_caps = VMX_VPID_INVVPID_BIT | |
bcdde302 | 3669 | VMX_VPID_EXTENT_SUPPORTED_MASK; |
1c13bffd | 3670 | } |
99b83ac8 | 3671 | |
0790ec17 | 3672 | if (enable_unrestricted_guest) |
6677f3da | 3673 | msrs->secondary_ctls_high |= |
0790ec17 RK |
3674 | SECONDARY_EXEC_UNRESTRICTED_GUEST; |
3675 | ||
2cf7ea9f PB |
3676 | if (flexpriority_enabled) |
3677 | msrs->secondary_ctls_high |= | |
3678 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
3679 | ||
c18911a2 | 3680 | /* miscellaneous data */ |
b9c237bb | 3681 | rdmsr(MSR_IA32_VMX_MISC, |
6677f3da PB |
3682 | msrs->misc_low, |
3683 | msrs->misc_high); | |
3684 | msrs->misc_low &= VMX_MISC_SAVE_EFER_LMA; | |
3685 | msrs->misc_low |= | |
f4160e45 | 3686 | MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS | |
b9c237bb | 3687 | VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE | |
f4124500 | 3688 | VMX_MISC_ACTIVITY_HLT; |
6677f3da | 3689 | msrs->misc_high = 0; |
62cc6b9d DM |
3690 | |
3691 | /* | |
3692 | * This MSR reports some information about VMX support. We | |
3693 | * should return information about the VMX we emulate for the | |
3694 | * guest, and the VMCS structure we give it - not about the | |
3695 | * VMX support of the underlying hardware. | |
3696 | */ | |
6677f3da | 3697 | msrs->basic = |
62cc6b9d DM |
3698 | VMCS12_REVISION | |
3699 | VMX_BASIC_TRUE_CTLS | | |
3700 | ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) | | |
3701 | (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT); | |
3702 | ||
3703 | if (cpu_has_vmx_basic_inout()) | |
6677f3da | 3704 | msrs->basic |= VMX_BASIC_INOUT; |
62cc6b9d DM |
3705 | |
3706 | /* | |
8322ebbb | 3707 | * These MSRs specify bits which the guest must keep fixed on |
62cc6b9d DM |
3708 | * while L1 is in VMXON mode (in L1's root mode, or running an L2). |
3709 | * We picked the standard core2 setting. | |
3710 | */ | |
3711 | #define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE) | |
3712 | #define VMXON_CR4_ALWAYSON X86_CR4_VMXE | |
6677f3da PB |
3713 | msrs->cr0_fixed0 = VMXON_CR0_ALWAYSON; |
3714 | msrs->cr4_fixed0 = VMXON_CR4_ALWAYSON; | |
8322ebbb DM |
3715 | |
3716 | /* These MSRs specify bits which the guest must keep fixed off. */ | |
6677f3da PB |
3717 | rdmsrl(MSR_IA32_VMX_CR0_FIXED1, msrs->cr0_fixed1); |
3718 | rdmsrl(MSR_IA32_VMX_CR4_FIXED1, msrs->cr4_fixed1); | |
62cc6b9d DM |
3719 | |
3720 | /* highest index: VMX_PREEMPTION_TIMER_VALUE */ | |
6677f3da | 3721 | msrs->vmcs_enum = VMCS12_MAX_FIELD_INDEX << 1; |
b87a51ae NHE |
3722 | } |
3723 | ||
3899152c DM |
3724 | /* |
3725 | * if fixed0[i] == 1: val[i] must be 1 | |
3726 | * if fixed1[i] == 0: val[i] must be 0 | |
3727 | */ | |
3728 | static inline bool fixed_bits_valid(u64 val, u64 fixed0, u64 fixed1) | |
3729 | { | |
3730 | return ((val & fixed1) | fixed0) == val; | |
b87a51ae NHE |
3731 | } |
3732 | ||
3733 | static inline bool vmx_control_verify(u32 control, u32 low, u32 high) | |
3734 | { | |
3899152c | 3735 | return fixed_bits_valid(control, low, high); |
b87a51ae NHE |
3736 | } |
3737 | ||
3738 | static inline u64 vmx_control_msr(u32 low, u32 high) | |
3739 | { | |
3740 | return low | ((u64)high << 32); | |
3741 | } | |
3742 | ||
62cc6b9d DM |
3743 | static bool is_bitwise_subset(u64 superset, u64 subset, u64 mask) |
3744 | { | |
3745 | superset &= mask; | |
3746 | subset &= mask; | |
3747 | ||
3748 | return (superset | subset) == superset; | |
3749 | } | |
3750 | ||
3751 | static int vmx_restore_vmx_basic(struct vcpu_vmx *vmx, u64 data) | |
3752 | { | |
3753 | const u64 feature_and_reserved = | |
3754 | /* feature (except bit 48; see below) */ | |
3755 | BIT_ULL(49) | BIT_ULL(54) | BIT_ULL(55) | | |
3756 | /* reserved */ | |
3757 | BIT_ULL(31) | GENMASK_ULL(47, 45) | GENMASK_ULL(63, 56); | |
6677f3da | 3758 | u64 vmx_basic = vmx->nested.msrs.basic; |
62cc6b9d DM |
3759 | |
3760 | if (!is_bitwise_subset(vmx_basic, data, feature_and_reserved)) | |
3761 | return -EINVAL; | |
3762 | ||
3763 | /* | |
3764 | * KVM does not emulate a version of VMX that constrains physical | |
3765 | * addresses of VMX structures (e.g. VMCS) to 32-bits. | |
3766 | */ | |
3767 | if (data & BIT_ULL(48)) | |
3768 | return -EINVAL; | |
3769 | ||
3770 | if (vmx_basic_vmcs_revision_id(vmx_basic) != | |
3771 | vmx_basic_vmcs_revision_id(data)) | |
3772 | return -EINVAL; | |
3773 | ||
3774 | if (vmx_basic_vmcs_size(vmx_basic) > vmx_basic_vmcs_size(data)) | |
3775 | return -EINVAL; | |
3776 | ||
6677f3da | 3777 | vmx->nested.msrs.basic = data; |
62cc6b9d DM |
3778 | return 0; |
3779 | } | |
3780 | ||
3781 | static int | |
3782 | vmx_restore_control_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data) | |
3783 | { | |
3784 | u64 supported; | |
3785 | u32 *lowp, *highp; | |
3786 | ||
3787 | switch (msr_index) { | |
3788 | case MSR_IA32_VMX_TRUE_PINBASED_CTLS: | |
6677f3da PB |
3789 | lowp = &vmx->nested.msrs.pinbased_ctls_low; |
3790 | highp = &vmx->nested.msrs.pinbased_ctls_high; | |
62cc6b9d DM |
3791 | break; |
3792 | case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: | |
6677f3da PB |
3793 | lowp = &vmx->nested.msrs.procbased_ctls_low; |
3794 | highp = &vmx->nested.msrs.procbased_ctls_high; | |
62cc6b9d DM |
3795 | break; |
3796 | case MSR_IA32_VMX_TRUE_EXIT_CTLS: | |
6677f3da PB |
3797 | lowp = &vmx->nested.msrs.exit_ctls_low; |
3798 | highp = &vmx->nested.msrs.exit_ctls_high; | |
62cc6b9d DM |
3799 | break; |
3800 | case MSR_IA32_VMX_TRUE_ENTRY_CTLS: | |
6677f3da PB |
3801 | lowp = &vmx->nested.msrs.entry_ctls_low; |
3802 | highp = &vmx->nested.msrs.entry_ctls_high; | |
62cc6b9d DM |
3803 | break; |
3804 | case MSR_IA32_VMX_PROCBASED_CTLS2: | |
6677f3da PB |
3805 | lowp = &vmx->nested.msrs.secondary_ctls_low; |
3806 | highp = &vmx->nested.msrs.secondary_ctls_high; | |
62cc6b9d DM |
3807 | break; |
3808 | default: | |
3809 | BUG(); | |
3810 | } | |
3811 | ||
3812 | supported = vmx_control_msr(*lowp, *highp); | |
3813 | ||
3814 | /* Check must-be-1 bits are still 1. */ | |
3815 | if (!is_bitwise_subset(data, supported, GENMASK_ULL(31, 0))) | |
3816 | return -EINVAL; | |
3817 | ||
3818 | /* Check must-be-0 bits are still 0. */ | |
3819 | if (!is_bitwise_subset(supported, data, GENMASK_ULL(63, 32))) | |
3820 | return -EINVAL; | |
3821 | ||
3822 | *lowp = data; | |
3823 | *highp = data >> 32; | |
3824 | return 0; | |
3825 | } | |
3826 | ||
3827 | static int vmx_restore_vmx_misc(struct vcpu_vmx *vmx, u64 data) | |
3828 | { | |
3829 | const u64 feature_and_reserved_bits = | |
3830 | /* feature */ | |
3831 | BIT_ULL(5) | GENMASK_ULL(8, 6) | BIT_ULL(14) | BIT_ULL(15) | | |
3832 | BIT_ULL(28) | BIT_ULL(29) | BIT_ULL(30) | | |
3833 | /* reserved */ | |
3834 | GENMASK_ULL(13, 9) | BIT_ULL(31); | |
3835 | u64 vmx_misc; | |
3836 | ||
6677f3da PB |
3837 | vmx_misc = vmx_control_msr(vmx->nested.msrs.misc_low, |
3838 | vmx->nested.msrs.misc_high); | |
62cc6b9d DM |
3839 | |
3840 | if (!is_bitwise_subset(vmx_misc, data, feature_and_reserved_bits)) | |
3841 | return -EINVAL; | |
3842 | ||
6677f3da | 3843 | if ((vmx->nested.msrs.pinbased_ctls_high & |
62cc6b9d DM |
3844 | PIN_BASED_VMX_PREEMPTION_TIMER) && |
3845 | vmx_misc_preemption_timer_rate(data) != | |
3846 | vmx_misc_preemption_timer_rate(vmx_misc)) | |
3847 | return -EINVAL; | |
3848 | ||
3849 | if (vmx_misc_cr3_count(data) > vmx_misc_cr3_count(vmx_misc)) | |
3850 | return -EINVAL; | |
3851 | ||
3852 | if (vmx_misc_max_msr(data) > vmx_misc_max_msr(vmx_misc)) | |
3853 | return -EINVAL; | |
3854 | ||
3855 | if (vmx_misc_mseg_revid(data) != vmx_misc_mseg_revid(vmx_misc)) | |
3856 | return -EINVAL; | |
3857 | ||
6677f3da PB |
3858 | vmx->nested.msrs.misc_low = data; |
3859 | vmx->nested.msrs.misc_high = data >> 32; | |
f4160e45 JM |
3860 | |
3861 | /* | |
3862 | * If L1 has read-only VM-exit information fields, use the | |
3863 | * less permissive vmx_vmwrite_bitmap to specify write | |
3864 | * permissions for the shadow VMCS. | |
3865 | */ | |
3866 | if (enable_shadow_vmcs && !nested_cpu_has_vmwrite_any_field(&vmx->vcpu)) | |
3867 | vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmwrite_bitmap)); | |
3868 | ||
62cc6b9d DM |
3869 | return 0; |
3870 | } | |
3871 | ||
3872 | static int vmx_restore_vmx_ept_vpid_cap(struct vcpu_vmx *vmx, u64 data) | |
3873 | { | |
3874 | u64 vmx_ept_vpid_cap; | |
3875 | ||
6677f3da PB |
3876 | vmx_ept_vpid_cap = vmx_control_msr(vmx->nested.msrs.ept_caps, |
3877 | vmx->nested.msrs.vpid_caps); | |
62cc6b9d DM |
3878 | |
3879 | /* Every bit is either reserved or a feature bit. */ | |
3880 | if (!is_bitwise_subset(vmx_ept_vpid_cap, data, -1ULL)) | |
3881 | return -EINVAL; | |
3882 | ||
6677f3da PB |
3883 | vmx->nested.msrs.ept_caps = data; |
3884 | vmx->nested.msrs.vpid_caps = data >> 32; | |
62cc6b9d DM |
3885 | return 0; |
3886 | } | |
3887 | ||
3888 | static int vmx_restore_fixed0_msr(struct vcpu_vmx *vmx, u32 msr_index, u64 data) | |
3889 | { | |
3890 | u64 *msr; | |
3891 | ||
3892 | switch (msr_index) { | |
3893 | case MSR_IA32_VMX_CR0_FIXED0: | |
6677f3da | 3894 | msr = &vmx->nested.msrs.cr0_fixed0; |
62cc6b9d DM |
3895 | break; |
3896 | case MSR_IA32_VMX_CR4_FIXED0: | |
6677f3da | 3897 | msr = &vmx->nested.msrs.cr4_fixed0; |
62cc6b9d DM |
3898 | break; |
3899 | default: | |
3900 | BUG(); | |
3901 | } | |
3902 | ||
3903 | /* | |
3904 | * 1 bits (which indicates bits which "must-be-1" during VMX operation) | |
3905 | * must be 1 in the restored value. | |
3906 | */ | |
3907 | if (!is_bitwise_subset(data, *msr, -1ULL)) | |
3908 | return -EINVAL; | |
3909 | ||
3910 | *msr = data; | |
3911 | return 0; | |
3912 | } | |
3913 | ||
3914 | /* | |
3915 | * Called when userspace is restoring VMX MSRs. | |
3916 | * | |
3917 | * Returns 0 on success, non-0 otherwise. | |
3918 | */ | |
3919 | static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
b87a51ae | 3920 | { |
b9c237bb WV |
3921 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3922 | ||
a943ac50 JM |
3923 | /* |
3924 | * Don't allow changes to the VMX capability MSRs while the vCPU | |
3925 | * is in VMX operation. | |
3926 | */ | |
3927 | if (vmx->nested.vmxon) | |
3928 | return -EBUSY; | |
3929 | ||
b87a51ae | 3930 | switch (msr_index) { |
b87a51ae | 3931 | case MSR_IA32_VMX_BASIC: |
62cc6b9d DM |
3932 | return vmx_restore_vmx_basic(vmx, data); |
3933 | case MSR_IA32_VMX_PINBASED_CTLS: | |
3934 | case MSR_IA32_VMX_PROCBASED_CTLS: | |
3935 | case MSR_IA32_VMX_EXIT_CTLS: | |
3936 | case MSR_IA32_VMX_ENTRY_CTLS: | |
b87a51ae | 3937 | /* |
62cc6b9d DM |
3938 | * The "non-true" VMX capability MSRs are generated from the |
3939 | * "true" MSRs, so we do not support restoring them directly. | |
3940 | * | |
3941 | * If userspace wants to emulate VMX_BASIC[55]=0, userspace | |
3942 | * should restore the "true" MSRs with the must-be-1 bits | |
3943 | * set according to the SDM Vol 3. A.2 "RESERVED CONTROLS AND | |
3944 | * DEFAULT SETTINGS". | |
b87a51ae | 3945 | */ |
62cc6b9d DM |
3946 | return -EINVAL; |
3947 | case MSR_IA32_VMX_TRUE_PINBASED_CTLS: | |
3948 | case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: | |
3949 | case MSR_IA32_VMX_TRUE_EXIT_CTLS: | |
3950 | case MSR_IA32_VMX_TRUE_ENTRY_CTLS: | |
3951 | case MSR_IA32_VMX_PROCBASED_CTLS2: | |
3952 | return vmx_restore_control_msr(vmx, msr_index, data); | |
3953 | case MSR_IA32_VMX_MISC: | |
3954 | return vmx_restore_vmx_misc(vmx, data); | |
3955 | case MSR_IA32_VMX_CR0_FIXED0: | |
3956 | case MSR_IA32_VMX_CR4_FIXED0: | |
3957 | return vmx_restore_fixed0_msr(vmx, msr_index, data); | |
3958 | case MSR_IA32_VMX_CR0_FIXED1: | |
3959 | case MSR_IA32_VMX_CR4_FIXED1: | |
3960 | /* | |
3961 | * These MSRs are generated based on the vCPU's CPUID, so we | |
3962 | * do not support restoring them directly. | |
3963 | */ | |
3964 | return -EINVAL; | |
3965 | case MSR_IA32_VMX_EPT_VPID_CAP: | |
3966 | return vmx_restore_vmx_ept_vpid_cap(vmx, data); | |
3967 | case MSR_IA32_VMX_VMCS_ENUM: | |
6677f3da | 3968 | vmx->nested.msrs.vmcs_enum = data; |
62cc6b9d DM |
3969 | return 0; |
3970 | default: | |
b87a51ae | 3971 | /* |
62cc6b9d | 3972 | * The rest of the VMX capability MSRs do not support restore. |
b87a51ae | 3973 | */ |
62cc6b9d DM |
3974 | return -EINVAL; |
3975 | } | |
3976 | } | |
3977 | ||
3978 | /* Returns 0 on success, non-0 otherwise. */ | |
6677f3da | 3979 | static int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata) |
62cc6b9d | 3980 | { |
62cc6b9d DM |
3981 | switch (msr_index) { |
3982 | case MSR_IA32_VMX_BASIC: | |
6677f3da | 3983 | *pdata = msrs->basic; |
b87a51ae NHE |
3984 | break; |
3985 | case MSR_IA32_VMX_TRUE_PINBASED_CTLS: | |
3986 | case MSR_IA32_VMX_PINBASED_CTLS: | |
b9c237bb | 3987 | *pdata = vmx_control_msr( |
6677f3da PB |
3988 | msrs->pinbased_ctls_low, |
3989 | msrs->pinbased_ctls_high); | |
0115f9cb DM |
3990 | if (msr_index == MSR_IA32_VMX_PINBASED_CTLS) |
3991 | *pdata |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR; | |
b87a51ae NHE |
3992 | break; |
3993 | case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: | |
3994 | case MSR_IA32_VMX_PROCBASED_CTLS: | |
b9c237bb | 3995 | *pdata = vmx_control_msr( |
6677f3da PB |
3996 | msrs->procbased_ctls_low, |
3997 | msrs->procbased_ctls_high); | |
0115f9cb DM |
3998 | if (msr_index == MSR_IA32_VMX_PROCBASED_CTLS) |
3999 | *pdata |= CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR; | |
b87a51ae NHE |
4000 | break; |
4001 | case MSR_IA32_VMX_TRUE_EXIT_CTLS: | |
4002 | case MSR_IA32_VMX_EXIT_CTLS: | |
b9c237bb | 4003 | *pdata = vmx_control_msr( |
6677f3da PB |
4004 | msrs->exit_ctls_low, |
4005 | msrs->exit_ctls_high); | |
0115f9cb DM |
4006 | if (msr_index == MSR_IA32_VMX_EXIT_CTLS) |
4007 | *pdata |= VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR; | |
b87a51ae NHE |
4008 | break; |
4009 | case MSR_IA32_VMX_TRUE_ENTRY_CTLS: | |
4010 | case MSR_IA32_VMX_ENTRY_CTLS: | |
b9c237bb | 4011 | *pdata = vmx_control_msr( |
6677f3da PB |
4012 | msrs->entry_ctls_low, |
4013 | msrs->entry_ctls_high); | |
0115f9cb DM |
4014 | if (msr_index == MSR_IA32_VMX_ENTRY_CTLS) |
4015 | *pdata |= VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR; | |
b87a51ae NHE |
4016 | break; |
4017 | case MSR_IA32_VMX_MISC: | |
b9c237bb | 4018 | *pdata = vmx_control_msr( |
6677f3da PB |
4019 | msrs->misc_low, |
4020 | msrs->misc_high); | |
b87a51ae | 4021 | break; |
b87a51ae | 4022 | case MSR_IA32_VMX_CR0_FIXED0: |
6677f3da | 4023 | *pdata = msrs->cr0_fixed0; |
b87a51ae NHE |
4024 | break; |
4025 | case MSR_IA32_VMX_CR0_FIXED1: | |
6677f3da | 4026 | *pdata = msrs->cr0_fixed1; |
b87a51ae NHE |
4027 | break; |
4028 | case MSR_IA32_VMX_CR4_FIXED0: | |
6677f3da | 4029 | *pdata = msrs->cr4_fixed0; |
b87a51ae NHE |
4030 | break; |
4031 | case MSR_IA32_VMX_CR4_FIXED1: | |
6677f3da | 4032 | *pdata = msrs->cr4_fixed1; |
b87a51ae NHE |
4033 | break; |
4034 | case MSR_IA32_VMX_VMCS_ENUM: | |
6677f3da | 4035 | *pdata = msrs->vmcs_enum; |
b87a51ae NHE |
4036 | break; |
4037 | case MSR_IA32_VMX_PROCBASED_CTLS2: | |
b9c237bb | 4038 | *pdata = vmx_control_msr( |
6677f3da PB |
4039 | msrs->secondary_ctls_low, |
4040 | msrs->secondary_ctls_high); | |
b87a51ae NHE |
4041 | break; |
4042 | case MSR_IA32_VMX_EPT_VPID_CAP: | |
6677f3da PB |
4043 | *pdata = msrs->ept_caps | |
4044 | ((u64)msrs->vpid_caps << 32); | |
b87a51ae | 4045 | break; |
27c42a1b | 4046 | case MSR_IA32_VMX_VMFUNC: |
6677f3da | 4047 | *pdata = msrs->vmfunc_controls; |
27c42a1b | 4048 | break; |
b87a51ae | 4049 | default: |
b87a51ae | 4050 | return 1; |
b3897a49 NHE |
4051 | } |
4052 | ||
b87a51ae NHE |
4053 | return 0; |
4054 | } | |
4055 | ||
37e4c997 HZ |
4056 | static inline bool vmx_feature_control_msr_valid(struct kvm_vcpu *vcpu, |
4057 | uint64_t val) | |
4058 | { | |
4059 | uint64_t valid_bits = to_vmx(vcpu)->msr_ia32_feature_control_valid_bits; | |
4060 | ||
4061 | return !(val & ~valid_bits); | |
4062 | } | |
4063 | ||
801e459a TL |
4064 | static int vmx_get_msr_feature(struct kvm_msr_entry *msr) |
4065 | { | |
1389309c PB |
4066 | switch (msr->index) { |
4067 | case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: | |
4068 | if (!nested) | |
4069 | return 1; | |
4070 | return vmx_get_vmx_msr(&vmcs_config.nested, msr->index, &msr->data); | |
4071 | default: | |
4072 | return 1; | |
4073 | } | |
4074 | ||
4075 | return 0; | |
801e459a TL |
4076 | } |
4077 | ||
6aa8b732 AK |
4078 | /* |
4079 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
4080 | * Returns 0 on success, non-0 otherwise. | |
4081 | * Assumes vcpu_load() was already called. | |
4082 | */ | |
609e36d3 | 4083 | static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
6aa8b732 | 4084 | { |
a6cb099a | 4085 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 4086 | struct shared_msr_entry *msr; |
6aa8b732 | 4087 | |
609e36d3 | 4088 | switch (msr_info->index) { |
05b3e0c2 | 4089 | #ifdef CONFIG_X86_64 |
6aa8b732 | 4090 | case MSR_FS_BASE: |
609e36d3 | 4091 | msr_info->data = vmcs_readl(GUEST_FS_BASE); |
6aa8b732 AK |
4092 | break; |
4093 | case MSR_GS_BASE: | |
609e36d3 | 4094 | msr_info->data = vmcs_readl(GUEST_GS_BASE); |
6aa8b732 | 4095 | break; |
44ea2b17 | 4096 | case MSR_KERNEL_GS_BASE: |
678e315e | 4097 | msr_info->data = vmx_read_guest_kernel_gs_base(vmx); |
44ea2b17 | 4098 | break; |
26bb0981 | 4099 | #endif |
6aa8b732 | 4100 | case MSR_EFER: |
609e36d3 | 4101 | return kvm_get_msr_common(vcpu, msr_info); |
d28b387f KA |
4102 | case MSR_IA32_SPEC_CTRL: |
4103 | if (!msr_info->host_initiated && | |
d28b387f KA |
4104 | !guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL)) |
4105 | return 1; | |
4106 | ||
4107 | msr_info->data = to_vmx(vcpu)->spec_ctrl; | |
4108 | break; | |
28c1c9fa KA |
4109 | case MSR_IA32_ARCH_CAPABILITIES: |
4110 | if (!msr_info->host_initiated && | |
4111 | !guest_cpuid_has(vcpu, X86_FEATURE_ARCH_CAPABILITIES)) | |
4112 | return 1; | |
4113 | msr_info->data = to_vmx(vcpu)->arch_capabilities; | |
4114 | break; | |
6aa8b732 | 4115 | case MSR_IA32_SYSENTER_CS: |
609e36d3 | 4116 | msr_info->data = vmcs_read32(GUEST_SYSENTER_CS); |
6aa8b732 AK |
4117 | break; |
4118 | case MSR_IA32_SYSENTER_EIP: | |
609e36d3 | 4119 | msr_info->data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
4120 | break; |
4121 | case MSR_IA32_SYSENTER_ESP: | |
609e36d3 | 4122 | msr_info->data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 4123 | break; |
0dd376e7 | 4124 | case MSR_IA32_BNDCFGS: |
691bd434 | 4125 | if (!kvm_mpx_supported() || |
d6321d49 RK |
4126 | (!msr_info->host_initiated && |
4127 | !guest_cpuid_has(vcpu, X86_FEATURE_MPX))) | |
93c4adc7 | 4128 | return 1; |
609e36d3 | 4129 | msr_info->data = vmcs_read64(GUEST_BNDCFGS); |
0dd376e7 | 4130 | break; |
c45dcc71 AR |
4131 | case MSR_IA32_MCG_EXT_CTL: |
4132 | if (!msr_info->host_initiated && | |
a6cb099a | 4133 | !(vmx->msr_ia32_feature_control & |
c45dcc71 | 4134 | FEATURE_CONTROL_LMCE)) |
cae50139 | 4135 | return 1; |
c45dcc71 AR |
4136 | msr_info->data = vcpu->arch.mcg_ext_ctl; |
4137 | break; | |
cae50139 | 4138 | case MSR_IA32_FEATURE_CONTROL: |
a6cb099a | 4139 | msr_info->data = vmx->msr_ia32_feature_control; |
cae50139 JK |
4140 | break; |
4141 | case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: | |
4142 | if (!nested_vmx_allowed(vcpu)) | |
4143 | return 1; | |
6677f3da PB |
4144 | return vmx_get_vmx_msr(&vmx->nested.msrs, msr_info->index, |
4145 | &msr_info->data); | |
20300099 WL |
4146 | case MSR_IA32_XSS: |
4147 | if (!vmx_xsaves_supported()) | |
4148 | return 1; | |
609e36d3 | 4149 | msr_info->data = vcpu->arch.ia32_xss; |
20300099 | 4150 | break; |
4e47c7a6 | 4151 | case MSR_TSC_AUX: |
d6321d49 RK |
4152 | if (!msr_info->host_initiated && |
4153 | !guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP)) | |
4e47c7a6 SY |
4154 | return 1; |
4155 | /* Otherwise falls through */ | |
6aa8b732 | 4156 | default: |
a6cb099a | 4157 | msr = find_msr_entry(vmx, msr_info->index); |
3bab1f5d | 4158 | if (msr) { |
609e36d3 | 4159 | msr_info->data = msr->data; |
3bab1f5d | 4160 | break; |
6aa8b732 | 4161 | } |
609e36d3 | 4162 | return kvm_get_msr_common(vcpu, msr_info); |
6aa8b732 AK |
4163 | } |
4164 | ||
6aa8b732 AK |
4165 | return 0; |
4166 | } | |
4167 | ||
cae50139 JK |
4168 | static void vmx_leave_nested(struct kvm_vcpu *vcpu); |
4169 | ||
6aa8b732 AK |
4170 | /* |
4171 | * Writes msr value into into the appropriate "register". | |
4172 | * Returns 0 on success, non-0 otherwise. | |
4173 | * Assumes vcpu_load() was already called. | |
4174 | */ | |
8fe8ab46 | 4175 | static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
6aa8b732 | 4176 | { |
a2fa3e9f | 4177 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 4178 | struct shared_msr_entry *msr; |
2cc51560 | 4179 | int ret = 0; |
8fe8ab46 WA |
4180 | u32 msr_index = msr_info->index; |
4181 | u64 data = msr_info->data; | |
2cc51560 | 4182 | |
6aa8b732 | 4183 | switch (msr_index) { |
3bab1f5d | 4184 | case MSR_EFER: |
8fe8ab46 | 4185 | ret = kvm_set_msr_common(vcpu, msr_info); |
2cc51560 | 4186 | break; |
16175a79 | 4187 | #ifdef CONFIG_X86_64 |
6aa8b732 | 4188 | case MSR_FS_BASE: |
2fb92db1 | 4189 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
4190 | vmcs_writel(GUEST_FS_BASE, data); |
4191 | break; | |
4192 | case MSR_GS_BASE: | |
2fb92db1 | 4193 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
4194 | vmcs_writel(GUEST_GS_BASE, data); |
4195 | break; | |
44ea2b17 | 4196 | case MSR_KERNEL_GS_BASE: |
678e315e | 4197 | vmx_write_guest_kernel_gs_base(vmx, data); |
44ea2b17 | 4198 | break; |
6aa8b732 AK |
4199 | #endif |
4200 | case MSR_IA32_SYSENTER_CS: | |
4201 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
4202 | break; | |
4203 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 4204 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
4205 | break; |
4206 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 4207 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 4208 | break; |
0dd376e7 | 4209 | case MSR_IA32_BNDCFGS: |
691bd434 | 4210 | if (!kvm_mpx_supported() || |
d6321d49 RK |
4211 | (!msr_info->host_initiated && |
4212 | !guest_cpuid_has(vcpu, X86_FEATURE_MPX))) | |
93c4adc7 | 4213 | return 1; |
fd8cb433 | 4214 | if (is_noncanonical_address(data & PAGE_MASK, vcpu) || |
4531662d | 4215 | (data & MSR_IA32_BNDCFGS_RSVD)) |
93c4adc7 | 4216 | return 1; |
0dd376e7 LJ |
4217 | vmcs_write64(GUEST_BNDCFGS, data); |
4218 | break; | |
d28b387f KA |
4219 | case MSR_IA32_SPEC_CTRL: |
4220 | if (!msr_info->host_initiated && | |
d28b387f KA |
4221 | !guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL)) |
4222 | return 1; | |
4223 | ||
4224 | /* The STIBP bit doesn't fault even if it's not advertised */ | |
9f65fb29 | 4225 | if (data & ~(SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD)) |
d28b387f KA |
4226 | return 1; |
4227 | ||
4228 | vmx->spec_ctrl = data; | |
4229 | ||
4230 | if (!data) | |
4231 | break; | |
4232 | ||
4233 | /* | |
4234 | * For non-nested: | |
4235 | * When it's written (to non-zero) for the first time, pass | |
4236 | * it through. | |
4237 | * | |
4238 | * For nested: | |
4239 | * The handling of the MSR bitmap for L2 guests is done in | |
4240 | * nested_vmx_merge_msr_bitmap. We should not touch the | |
4241 | * vmcs02.msr_bitmap here since it gets completely overwritten | |
4242 | * in the merging. We update the vmcs01 here for L1 as well | |
4243 | * since it will end up touching the MSR anyway now. | |
4244 | */ | |
4245 | vmx_disable_intercept_for_msr(vmx->vmcs01.msr_bitmap, | |
4246 | MSR_IA32_SPEC_CTRL, | |
4247 | MSR_TYPE_RW); | |
4248 | break; | |
15d45071 AR |
4249 | case MSR_IA32_PRED_CMD: |
4250 | if (!msr_info->host_initiated && | |
15d45071 AR |
4251 | !guest_cpuid_has(vcpu, X86_FEATURE_SPEC_CTRL)) |
4252 | return 1; | |
4253 | ||
4254 | if (data & ~PRED_CMD_IBPB) | |
4255 | return 1; | |
4256 | ||
4257 | if (!data) | |
4258 | break; | |
4259 | ||
4260 | wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB); | |
4261 | ||
4262 | /* | |
4263 | * For non-nested: | |
4264 | * When it's written (to non-zero) for the first time, pass | |
4265 | * it through. | |
4266 | * | |
4267 | * For nested: | |
4268 | * The handling of the MSR bitmap for L2 guests is done in | |
4269 | * nested_vmx_merge_msr_bitmap. We should not touch the | |
4270 | * vmcs02.msr_bitmap here since it gets completely overwritten | |
4271 | * in the merging. | |
4272 | */ | |
4273 | vmx_disable_intercept_for_msr(vmx->vmcs01.msr_bitmap, MSR_IA32_PRED_CMD, | |
4274 | MSR_TYPE_W); | |
4275 | break; | |
28c1c9fa KA |
4276 | case MSR_IA32_ARCH_CAPABILITIES: |
4277 | if (!msr_info->host_initiated) | |
4278 | return 1; | |
4279 | vmx->arch_capabilities = data; | |
4280 | break; | |
468d472f SY |
4281 | case MSR_IA32_CR_PAT: |
4282 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
4566654b NA |
4283 | if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data)) |
4284 | return 1; | |
468d472f SY |
4285 | vmcs_write64(GUEST_IA32_PAT, data); |
4286 | vcpu->arch.pat = data; | |
4287 | break; | |
4288 | } | |
8fe8ab46 | 4289 | ret = kvm_set_msr_common(vcpu, msr_info); |
4e47c7a6 | 4290 | break; |
ba904635 WA |
4291 | case MSR_IA32_TSC_ADJUST: |
4292 | ret = kvm_set_msr_common(vcpu, msr_info); | |
4e47c7a6 | 4293 | break; |
c45dcc71 AR |
4294 | case MSR_IA32_MCG_EXT_CTL: |
4295 | if ((!msr_info->host_initiated && | |
4296 | !(to_vmx(vcpu)->msr_ia32_feature_control & | |
4297 | FEATURE_CONTROL_LMCE)) || | |
4298 | (data & ~MCG_EXT_CTL_LMCE_EN)) | |
4299 | return 1; | |
4300 | vcpu->arch.mcg_ext_ctl = data; | |
4301 | break; | |
cae50139 | 4302 | case MSR_IA32_FEATURE_CONTROL: |
37e4c997 | 4303 | if (!vmx_feature_control_msr_valid(vcpu, data) || |
3b84080b | 4304 | (to_vmx(vcpu)->msr_ia32_feature_control & |
cae50139 JK |
4305 | FEATURE_CONTROL_LOCKED && !msr_info->host_initiated)) |
4306 | return 1; | |
3b84080b | 4307 | vmx->msr_ia32_feature_control = data; |
cae50139 JK |
4308 | if (msr_info->host_initiated && data == 0) |
4309 | vmx_leave_nested(vcpu); | |
4310 | break; | |
4311 | case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: | |
62cc6b9d DM |
4312 | if (!msr_info->host_initiated) |
4313 | return 1; /* they are read-only */ | |
4314 | if (!nested_vmx_allowed(vcpu)) | |
4315 | return 1; | |
4316 | return vmx_set_vmx_msr(vcpu, msr_index, data); | |
20300099 WL |
4317 | case MSR_IA32_XSS: |
4318 | if (!vmx_xsaves_supported()) | |
4319 | return 1; | |
4320 | /* | |
4321 | * The only supported bit as of Skylake is bit 8, but | |
4322 | * it is not supported on KVM. | |
4323 | */ | |
4324 | if (data != 0) | |
4325 | return 1; | |
4326 | vcpu->arch.ia32_xss = data; | |
4327 | if (vcpu->arch.ia32_xss != host_xss) | |
4328 | add_atomic_switch_msr(vmx, MSR_IA32_XSS, | |
989e3992 | 4329 | vcpu->arch.ia32_xss, host_xss, false); |
20300099 WL |
4330 | else |
4331 | clear_atomic_switch_msr(vmx, MSR_IA32_XSS); | |
4332 | break; | |
4e47c7a6 | 4333 | case MSR_TSC_AUX: |
d6321d49 RK |
4334 | if (!msr_info->host_initiated && |
4335 | !guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP)) | |
4e47c7a6 SY |
4336 | return 1; |
4337 | /* Check reserved bit, higher 32 bits should be zero */ | |
4338 | if ((data >> 32) != 0) | |
4339 | return 1; | |
4340 | /* Otherwise falls through */ | |
6aa8b732 | 4341 | default: |
8b9cf98c | 4342 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d | 4343 | if (msr) { |
8b3c3104 | 4344 | u64 old_msr_data = msr->data; |
3bab1f5d | 4345 | msr->data = data; |
2225fd56 AK |
4346 | if (msr - vmx->guest_msrs < vmx->save_nmsrs) { |
4347 | preempt_disable(); | |
8b3c3104 AH |
4348 | ret = kvm_set_shared_msr(msr->index, msr->data, |
4349 | msr->mask); | |
2225fd56 | 4350 | preempt_enable(); |
8b3c3104 AH |
4351 | if (ret) |
4352 | msr->data = old_msr_data; | |
2225fd56 | 4353 | } |
3bab1f5d | 4354 | break; |
6aa8b732 | 4355 | } |
8fe8ab46 | 4356 | ret = kvm_set_msr_common(vcpu, msr_info); |
6aa8b732 AK |
4357 | } |
4358 | ||
2cc51560 | 4359 | return ret; |
6aa8b732 AK |
4360 | } |
4361 | ||
5fdbf976 | 4362 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 4363 | { |
5fdbf976 MT |
4364 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
4365 | switch (reg) { | |
4366 | case VCPU_REGS_RSP: | |
4367 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
4368 | break; | |
4369 | case VCPU_REGS_RIP: | |
4370 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
4371 | break; | |
6de4f3ad AK |
4372 | case VCPU_EXREG_PDPTR: |
4373 | if (enable_ept) | |
4374 | ept_save_pdptrs(vcpu); | |
4375 | break; | |
5fdbf976 MT |
4376 | default: |
4377 | break; | |
4378 | } | |
6aa8b732 AK |
4379 | } |
4380 | ||
6aa8b732 AK |
4381 | static __init int cpu_has_kvm_support(void) |
4382 | { | |
6210e37b | 4383 | return cpu_has_vmx(); |
6aa8b732 AK |
4384 | } |
4385 | ||
4386 | static __init int vmx_disabled_by_bios(void) | |
4387 | { | |
4388 | u64 msr; | |
4389 | ||
4390 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
cafd6659 | 4391 | if (msr & FEATURE_CONTROL_LOCKED) { |
23f3e991 | 4392 | /* launched w/ TXT and VMX disabled */ |
cafd6659 SW |
4393 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
4394 | && tboot_enabled()) | |
4395 | return 1; | |
23f3e991 | 4396 | /* launched w/o TXT and VMX only enabled w/ TXT */ |
cafd6659 | 4397 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) |
23f3e991 | 4398 | && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
f9335afe SW |
4399 | && !tboot_enabled()) { |
4400 | printk(KERN_WARNING "kvm: disable TXT in the BIOS or " | |
23f3e991 | 4401 | "activate TXT before enabling KVM\n"); |
cafd6659 | 4402 | return 1; |
f9335afe | 4403 | } |
23f3e991 JC |
4404 | /* launched w/o TXT and VMX disabled */ |
4405 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) | |
4406 | && !tboot_enabled()) | |
4407 | return 1; | |
cafd6659 SW |
4408 | } |
4409 | ||
4410 | return 0; | |
6aa8b732 AK |
4411 | } |
4412 | ||
7725b894 DX |
4413 | static void kvm_cpu_vmxon(u64 addr) |
4414 | { | |
fe0e80be | 4415 | cr4_set_bits(X86_CR4_VMXE); |
1c5ac21a AS |
4416 | intel_pt_handle_vmx(1); |
4417 | ||
4b1e5478 | 4418 | asm volatile ("vmxon %0" : : "m"(addr)); |
7725b894 DX |
4419 | } |
4420 | ||
13a34e06 | 4421 | static int hardware_enable(void) |
6aa8b732 AK |
4422 | { |
4423 | int cpu = raw_smp_processor_id(); | |
4424 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
cafd6659 | 4425 | u64 old, test_bits; |
6aa8b732 | 4426 | |
1e02ce4c | 4427 | if (cr4_read_shadow() & X86_CR4_VMXE) |
10474ae8 AG |
4428 | return -EBUSY; |
4429 | ||
773e8a04 VK |
4430 | /* |
4431 | * This can happen if we hot-added a CPU but failed to allocate | |
4432 | * VP assist page for it. | |
4433 | */ | |
4434 | if (static_branch_unlikely(&enable_evmcs) && | |
4435 | !hv_get_vp_assist_page(cpu)) | |
4436 | return -EFAULT; | |
4437 | ||
d462b819 | 4438 | INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu)); |
bf9f6ac8 FW |
4439 | INIT_LIST_HEAD(&per_cpu(blocked_vcpu_on_cpu, cpu)); |
4440 | spin_lock_init(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); | |
8f536b76 ZY |
4441 | |
4442 | /* | |
4443 | * Now we can enable the vmclear operation in kdump | |
4444 | * since the loaded_vmcss_on_cpu list on this cpu | |
4445 | * has been initialized. | |
4446 | * | |
4447 | * Though the cpu is not in VMX operation now, there | |
4448 | * is no problem to enable the vmclear operation | |
4449 | * for the loaded_vmcss_on_cpu list is empty! | |
4450 | */ | |
4451 | crash_enable_local_vmclear(cpu); | |
4452 | ||
6aa8b732 | 4453 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
cafd6659 SW |
4454 | |
4455 | test_bits = FEATURE_CONTROL_LOCKED; | |
4456 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
4457 | if (tboot_enabled()) | |
4458 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX; | |
4459 | ||
4460 | if ((old & test_bits) != test_bits) { | |
6aa8b732 | 4461 | /* enable and lock */ |
cafd6659 SW |
4462 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits); |
4463 | } | |
fe0e80be | 4464 | kvm_cpu_vmxon(phys_addr); |
fdf288bf DH |
4465 | if (enable_ept) |
4466 | ept_sync_global(); | |
10474ae8 AG |
4467 | |
4468 | return 0; | |
6aa8b732 AK |
4469 | } |
4470 | ||
d462b819 | 4471 | static void vmclear_local_loaded_vmcss(void) |
543e4243 AK |
4472 | { |
4473 | int cpu = raw_smp_processor_id(); | |
d462b819 | 4474 | struct loaded_vmcs *v, *n; |
543e4243 | 4475 | |
d462b819 NHE |
4476 | list_for_each_entry_safe(v, n, &per_cpu(loaded_vmcss_on_cpu, cpu), |
4477 | loaded_vmcss_on_cpu_link) | |
4478 | __loaded_vmcs_clear(v); | |
543e4243 AK |
4479 | } |
4480 | ||
710ff4a8 EH |
4481 | |
4482 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
4483 | * tricks. | |
4484 | */ | |
4485 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 4486 | { |
4b1e5478 | 4487 | asm volatile (__ex("vmxoff")); |
1c5ac21a AS |
4488 | |
4489 | intel_pt_handle_vmx(0); | |
fe0e80be | 4490 | cr4_clear_bits(X86_CR4_VMXE); |
6aa8b732 AK |
4491 | } |
4492 | ||
13a34e06 | 4493 | static void hardware_disable(void) |
710ff4a8 | 4494 | { |
fe0e80be DH |
4495 | vmclear_local_loaded_vmcss(); |
4496 | kvm_cpu_vmxoff(); | |
710ff4a8 EH |
4497 | } |
4498 | ||
1c3d14fe | 4499 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 4500 | u32 msr, u32 *result) |
1c3d14fe YS |
4501 | { |
4502 | u32 vmx_msr_low, vmx_msr_high; | |
4503 | u32 ctl = ctl_min | ctl_opt; | |
4504 | ||
4505 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
4506 | ||
4507 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
4508 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
4509 | ||
4510 | /* Ensure minimum (required) set of control bits are supported. */ | |
4511 | if (ctl_min & ~ctl) | |
002c7f7c | 4512 | return -EIO; |
1c3d14fe YS |
4513 | |
4514 | *result = ctl; | |
4515 | return 0; | |
4516 | } | |
4517 | ||
110312c8 AK |
4518 | static __init bool allow_1_setting(u32 msr, u32 ctl) |
4519 | { | |
4520 | u32 vmx_msr_low, vmx_msr_high; | |
4521 | ||
4522 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
4523 | return vmx_msr_high & ctl; | |
4524 | } | |
4525 | ||
002c7f7c | 4526 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
4527 | { |
4528 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 4529 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
4530 | u32 _pin_based_exec_control = 0; |
4531 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 4532 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
4533 | u32 _vmexit_control = 0; |
4534 | u32 _vmentry_control = 0; | |
4535 | ||
1389309c | 4536 | memset(vmcs_conf, 0, sizeof(*vmcs_conf)); |
10166744 | 4537 | min = CPU_BASED_HLT_EXITING | |
1c3d14fe YS |
4538 | #ifdef CONFIG_X86_64 |
4539 | CPU_BASED_CR8_LOAD_EXITING | | |
4540 | CPU_BASED_CR8_STORE_EXITING | | |
4541 | #endif | |
d56f546d SY |
4542 | CPU_BASED_CR3_LOAD_EXITING | |
4543 | CPU_BASED_CR3_STORE_EXITING | | |
8eb73e2d | 4544 | CPU_BASED_UNCOND_IO_EXITING | |
1c3d14fe | 4545 | CPU_BASED_MOV_DR_EXITING | |
a7052897 | 4546 | CPU_BASED_USE_TSC_OFFSETING | |
4d5422ce WL |
4547 | CPU_BASED_MWAIT_EXITING | |
4548 | CPU_BASED_MONITOR_EXITING | | |
fee84b07 AK |
4549 | CPU_BASED_INVLPG_EXITING | |
4550 | CPU_BASED_RDPMC_EXITING; | |
443381a8 | 4551 | |
f78e0e2e | 4552 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 4553 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 4554 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
4555 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
4556 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 4557 | return -EIO; |
6e5d865c YS |
4558 | #ifdef CONFIG_X86_64 |
4559 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
4560 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
4561 | ~CPU_BASED_CR8_STORE_EXITING; | |
4562 | #endif | |
f78e0e2e | 4563 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
4564 | min2 = 0; |
4565 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
8d14695f | 4566 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
2384d2b3 | 4567 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 4568 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 4569 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 | 4570 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
4e47c7a6 | 4571 | SECONDARY_EXEC_PAUSE_LOOP_EXITING | |
0367f205 | 4572 | SECONDARY_EXEC_DESC | |
ad756a16 | 4573 | SECONDARY_EXEC_RDTSCP | |
83d4c286 | 4574 | SECONDARY_EXEC_ENABLE_INVPCID | |
c7c9c56c | 4575 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
abc4fc58 | 4576 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | |
20300099 | 4577 | SECONDARY_EXEC_SHADOW_VMCS | |
843e4330 | 4578 | SECONDARY_EXEC_XSAVES | |
736fdf72 DH |
4579 | SECONDARY_EXEC_RDSEED_EXITING | |
4580 | SECONDARY_EXEC_RDRAND_EXITING | | |
8b3e34e4 | 4581 | SECONDARY_EXEC_ENABLE_PML | |
2a499e49 | 4582 | SECONDARY_EXEC_TSC_SCALING | |
0b665d30 SC |
4583 | SECONDARY_EXEC_ENABLE_VMFUNC | |
4584 | SECONDARY_EXEC_ENCLS_EXITING; | |
d56f546d SY |
4585 | if (adjust_vmx_controls(min2, opt2, |
4586 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
4587 | &_cpu_based_2nd_exec_control) < 0) |
4588 | return -EIO; | |
4589 | } | |
4590 | #ifndef CONFIG_X86_64 | |
4591 | if (!(_cpu_based_2nd_exec_control & | |
4592 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
4593 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
4594 | #endif | |
83d4c286 YZ |
4595 | |
4596 | if (!(_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
4597 | _cpu_based_2nd_exec_control &= ~( | |
8d14695f | 4598 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
c7c9c56c YZ |
4599 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
4600 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
83d4c286 | 4601 | |
61f1dd90 WL |
4602 | rdmsr_safe(MSR_IA32_VMX_EPT_VPID_CAP, |
4603 | &vmx_capability.ept, &vmx_capability.vpid); | |
4604 | ||
d56f546d | 4605 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
4606 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
4607 | enabled */ | |
5fff7d27 GN |
4608 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
4609 | CPU_BASED_CR3_STORE_EXITING | | |
4610 | CPU_BASED_INVLPG_EXITING); | |
61f1dd90 WL |
4611 | } else if (vmx_capability.ept) { |
4612 | vmx_capability.ept = 0; | |
4613 | pr_warn_once("EPT CAP should not exist if not support " | |
4614 | "1-setting enable EPT VM-execution control\n"); | |
4615 | } | |
4616 | if (!(_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_VPID) && | |
4617 | vmx_capability.vpid) { | |
4618 | vmx_capability.vpid = 0; | |
4619 | pr_warn_once("VPID CAP should not exist if not support " | |
4620 | "1-setting enable VPID VM-execution control\n"); | |
d56f546d | 4621 | } |
1c3d14fe | 4622 | |
91fa0f8e | 4623 | min = VM_EXIT_SAVE_DEBUG_CONTROLS | VM_EXIT_ACK_INTR_ON_EXIT; |
1c3d14fe YS |
4624 | #ifdef CONFIG_X86_64 |
4625 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
4626 | #endif | |
a547c6db | 4627 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT | |
91fa0f8e | 4628 | VM_EXIT_CLEAR_BNDCFGS; |
1c3d14fe YS |
4629 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
4630 | &_vmexit_control) < 0) | |
002c7f7c | 4631 | return -EIO; |
1c3d14fe | 4632 | |
8a1b4392 PB |
4633 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; |
4634 | opt = PIN_BASED_VIRTUAL_NMIS | PIN_BASED_POSTED_INTR | | |
4635 | PIN_BASED_VMX_PREEMPTION_TIMER; | |
01e439be YZ |
4636 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
4637 | &_pin_based_exec_control) < 0) | |
4638 | return -EIO; | |
4639 | ||
1c17c3e6 PB |
4640 | if (cpu_has_broken_vmx_preemption_timer()) |
4641 | _pin_based_exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER; | |
01e439be | 4642 | if (!(_cpu_based_2nd_exec_control & |
91fa0f8e | 4643 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY)) |
01e439be YZ |
4644 | _pin_based_exec_control &= ~PIN_BASED_POSTED_INTR; |
4645 | ||
c845f9c6 | 4646 | min = VM_ENTRY_LOAD_DEBUG_CONTROLS; |
da8999d3 | 4647 | opt = VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_BNDCFGS; |
1c3d14fe YS |
4648 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
4649 | &_vmentry_control) < 0) | |
002c7f7c | 4650 | return -EIO; |
6aa8b732 | 4651 | |
c68876fd | 4652 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
4653 | |
4654 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
4655 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 4656 | return -EIO; |
1c3d14fe YS |
4657 | |
4658 | #ifdef CONFIG_X86_64 | |
4659 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
4660 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 4661 | return -EIO; |
1c3d14fe YS |
4662 | #endif |
4663 | ||
4664 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
4665 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 4666 | return -EIO; |
1c3d14fe | 4667 | |
002c7f7c | 4668 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
16cb0255 | 4669 | vmcs_conf->order = get_order(vmcs_conf->size); |
9ac7e3e8 | 4670 | vmcs_conf->basic_cap = vmx_msr_high & ~0x1fff; |
773e8a04 | 4671 | |
2307af1c | 4672 | vmcs_conf->revision_id = vmx_msr_low; |
1c3d14fe | 4673 | |
002c7f7c YS |
4674 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
4675 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 4676 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
4677 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
4678 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe | 4679 | |
773e8a04 VK |
4680 | if (static_branch_unlikely(&enable_evmcs)) |
4681 | evmcs_sanitize_exec_ctrls(vmcs_conf); | |
4682 | ||
110312c8 AK |
4683 | cpu_has_load_ia32_efer = |
4684 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
4685 | VM_ENTRY_LOAD_IA32_EFER) | |
4686 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
4687 | VM_EXIT_LOAD_IA32_EFER); | |
4688 | ||
8bf00a52 GN |
4689 | cpu_has_load_perf_global_ctrl = |
4690 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
4691 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) | |
4692 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
4693 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); | |
4694 | ||
4695 | /* | |
4696 | * Some cpus support VM_ENTRY_(LOAD|SAVE)_IA32_PERF_GLOBAL_CTRL | |
bb3541f1 | 4697 | * but due to errata below it can't be used. Workaround is to use |
8bf00a52 GN |
4698 | * msr load mechanism to switch IA32_PERF_GLOBAL_CTRL. |
4699 | * | |
4700 | * VM Exit May Incorrectly Clear IA32_PERF_GLOBAL_CTRL [34:32] | |
4701 | * | |
4702 | * AAK155 (model 26) | |
4703 | * AAP115 (model 30) | |
4704 | * AAT100 (model 37) | |
4705 | * BC86,AAY89,BD102 (model 44) | |
4706 | * BA97 (model 46) | |
4707 | * | |
4708 | */ | |
4709 | if (cpu_has_load_perf_global_ctrl && boot_cpu_data.x86 == 0x6) { | |
4710 | switch (boot_cpu_data.x86_model) { | |
4711 | case 26: | |
4712 | case 30: | |
4713 | case 37: | |
4714 | case 44: | |
4715 | case 46: | |
4716 | cpu_has_load_perf_global_ctrl = false; | |
4717 | printk_once(KERN_WARNING"kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL " | |
4718 | "does not work properly. Using workaround\n"); | |
4719 | break; | |
4720 | default: | |
4721 | break; | |
4722 | } | |
4723 | } | |
4724 | ||
782511b0 | 4725 | if (boot_cpu_has(X86_FEATURE_XSAVES)) |
20300099 WL |
4726 | rdmsrl(MSR_IA32_XSS, host_xss); |
4727 | ||
1c3d14fe | 4728 | return 0; |
c68876fd | 4729 | } |
6aa8b732 | 4730 | |
491a6038 | 4731 | static struct vmcs *alloc_vmcs_cpu(bool shadow, int cpu) |
6aa8b732 AK |
4732 | { |
4733 | int node = cpu_to_node(cpu); | |
4734 | struct page *pages; | |
4735 | struct vmcs *vmcs; | |
4736 | ||
96db800f | 4737 | pages = __alloc_pages_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
4738 | if (!pages) |
4739 | return NULL; | |
4740 | vmcs = page_address(pages); | |
1c3d14fe | 4741 | memset(vmcs, 0, vmcs_config.size); |
2307af1c LA |
4742 | |
4743 | /* KVM supports Enlightened VMCS v1 only */ | |
4744 | if (static_branch_unlikely(&enable_evmcs)) | |
392b2f25 | 4745 | vmcs->hdr.revision_id = KVM_EVMCS_VERSION; |
2307af1c | 4746 | else |
392b2f25 | 4747 | vmcs->hdr.revision_id = vmcs_config.revision_id; |
2307af1c | 4748 | |
491a6038 LA |
4749 | if (shadow) |
4750 | vmcs->hdr.shadow_vmcs = 1; | |
6aa8b732 AK |
4751 | return vmcs; |
4752 | } | |
4753 | ||
6aa8b732 AK |
4754 | static void free_vmcs(struct vmcs *vmcs) |
4755 | { | |
1c3d14fe | 4756 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
4757 | } |
4758 | ||
d462b819 NHE |
4759 | /* |
4760 | * Free a VMCS, but before that VMCLEAR it on the CPU where it was last loaded | |
4761 | */ | |
4762 | static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs) | |
4763 | { | |
4764 | if (!loaded_vmcs->vmcs) | |
4765 | return; | |
4766 | loaded_vmcs_clear(loaded_vmcs); | |
4767 | free_vmcs(loaded_vmcs->vmcs); | |
4768 | loaded_vmcs->vmcs = NULL; | |
904e14fb PB |
4769 | if (loaded_vmcs->msr_bitmap) |
4770 | free_page((unsigned long)loaded_vmcs->msr_bitmap); | |
355f4fb1 | 4771 | WARN_ON(loaded_vmcs->shadow_vmcs != NULL); |
d462b819 NHE |
4772 | } |
4773 | ||
491a6038 | 4774 | static struct vmcs *alloc_vmcs(bool shadow) |
f21f165e | 4775 | { |
491a6038 | 4776 | return alloc_vmcs_cpu(shadow, raw_smp_processor_id()); |
f21f165e PB |
4777 | } |
4778 | ||
4779 | static int alloc_loaded_vmcs(struct loaded_vmcs *loaded_vmcs) | |
4780 | { | |
491a6038 | 4781 | loaded_vmcs->vmcs = alloc_vmcs(false); |
f21f165e PB |
4782 | if (!loaded_vmcs->vmcs) |
4783 | return -ENOMEM; | |
4784 | ||
4785 | loaded_vmcs->shadow_vmcs = NULL; | |
4786 | loaded_vmcs_init(loaded_vmcs); | |
904e14fb PB |
4787 | |
4788 | if (cpu_has_vmx_msr_bitmap()) { | |
4789 | loaded_vmcs->msr_bitmap = (unsigned long *)__get_free_page(GFP_KERNEL); | |
4790 | if (!loaded_vmcs->msr_bitmap) | |
4791 | goto out_vmcs; | |
4792 | memset(loaded_vmcs->msr_bitmap, 0xff, PAGE_SIZE); | |
ceef7d10 | 4793 | |
1f008e11 AB |
4794 | if (IS_ENABLED(CONFIG_HYPERV) && |
4795 | static_branch_unlikely(&enable_evmcs) && | |
ceef7d10 VK |
4796 | (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP)) { |
4797 | struct hv_enlightened_vmcs *evmcs = | |
4798 | (struct hv_enlightened_vmcs *)loaded_vmcs->vmcs; | |
4799 | ||
4800 | evmcs->hv_enlightenments_control.msr_bitmap = 1; | |
4801 | } | |
904e14fb | 4802 | } |
d7ee039e SC |
4803 | |
4804 | memset(&loaded_vmcs->host_state, 0, sizeof(struct vmcs_host_state)); | |
4805 | ||
f21f165e | 4806 | return 0; |
904e14fb PB |
4807 | |
4808 | out_vmcs: | |
4809 | free_loaded_vmcs(loaded_vmcs); | |
4810 | return -ENOMEM; | |
f21f165e PB |
4811 | } |
4812 | ||
39959588 | 4813 | static void free_kvm_area(void) |
6aa8b732 AK |
4814 | { |
4815 | int cpu; | |
4816 | ||
3230bb47 | 4817 | for_each_possible_cpu(cpu) { |
6aa8b732 | 4818 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
4819 | per_cpu(vmxarea, cpu) = NULL; |
4820 | } | |
6aa8b732 AK |
4821 | } |
4822 | ||
d37f4267 JM |
4823 | enum vmcs_field_width { |
4824 | VMCS_FIELD_WIDTH_U16 = 0, | |
4825 | VMCS_FIELD_WIDTH_U64 = 1, | |
4826 | VMCS_FIELD_WIDTH_U32 = 2, | |
4827 | VMCS_FIELD_WIDTH_NATURAL_WIDTH = 3 | |
85fd514e JM |
4828 | }; |
4829 | ||
d37f4267 | 4830 | static inline int vmcs_field_width(unsigned long field) |
85fd514e JM |
4831 | { |
4832 | if (0x1 & field) /* the *_HIGH fields are all 32 bit */ | |
d37f4267 | 4833 | return VMCS_FIELD_WIDTH_U32; |
85fd514e JM |
4834 | return (field >> 13) & 0x3 ; |
4835 | } | |
4836 | ||
4837 | static inline int vmcs_field_readonly(unsigned long field) | |
4838 | { | |
4839 | return (((field >> 10) & 0x3) == 1); | |
4840 | } | |
4841 | ||
fe2b201b BD |
4842 | static void init_vmcs_shadow_fields(void) |
4843 | { | |
4844 | int i, j; | |
4845 | ||
44900ba6 PB |
4846 | for (i = j = 0; i < max_shadow_read_only_fields; i++) { |
4847 | u16 field = shadow_read_only_fields[i]; | |
d37f4267 | 4848 | if (vmcs_field_width(field) == VMCS_FIELD_WIDTH_U64 && |
44900ba6 PB |
4849 | (i + 1 == max_shadow_read_only_fields || |
4850 | shadow_read_only_fields[i + 1] != field + 1)) | |
4851 | pr_err("Missing field from shadow_read_only_field %x\n", | |
4852 | field + 1); | |
4853 | ||
4854 | clear_bit(field, vmx_vmread_bitmap); | |
4855 | #ifdef CONFIG_X86_64 | |
4856 | if (field & 1) | |
4857 | continue; | |
4858 | #endif | |
4859 | if (j < i) | |
4860 | shadow_read_only_fields[j] = field; | |
4861 | j++; | |
4862 | } | |
4863 | max_shadow_read_only_fields = j; | |
fe2b201b BD |
4864 | |
4865 | for (i = j = 0; i < max_shadow_read_write_fields; i++) { | |
44900ba6 | 4866 | u16 field = shadow_read_write_fields[i]; |
d37f4267 | 4867 | if (vmcs_field_width(field) == VMCS_FIELD_WIDTH_U64 && |
44900ba6 PB |
4868 | (i + 1 == max_shadow_read_write_fields || |
4869 | shadow_read_write_fields[i + 1] != field + 1)) | |
4870 | pr_err("Missing field from shadow_read_write_field %x\n", | |
4871 | field + 1); | |
4872 | ||
c5d167b2 PB |
4873 | /* |
4874 | * PML and the preemption timer can be emulated, but the | |
4875 | * processor cannot vmwrite to fields that don't exist | |
4876 | * on bare metal. | |
4877 | */ | |
44900ba6 | 4878 | switch (field) { |
c5d167b2 PB |
4879 | case GUEST_PML_INDEX: |
4880 | if (!cpu_has_vmx_pml()) | |
4881 | continue; | |
4882 | break; | |
4883 | case VMX_PREEMPTION_TIMER_VALUE: | |
4884 | if (!cpu_has_vmx_preemption_timer()) | |
4885 | continue; | |
4886 | break; | |
4887 | case GUEST_INTR_STATUS: | |
4888 | if (!cpu_has_vmx_apicv()) | |
fe2b201b BD |
4889 | continue; |
4890 | break; | |
4891 | default: | |
4892 | break; | |
4893 | } | |
4894 | ||
44900ba6 PB |
4895 | clear_bit(field, vmx_vmwrite_bitmap); |
4896 | clear_bit(field, vmx_vmread_bitmap); | |
4897 | #ifdef CONFIG_X86_64 | |
4898 | if (field & 1) | |
4899 | continue; | |
4900 | #endif | |
fe2b201b | 4901 | if (j < i) |
44900ba6 | 4902 | shadow_read_write_fields[j] = field; |
fe2b201b BD |
4903 | j++; |
4904 | } | |
4905 | max_shadow_read_write_fields = j; | |
fe2b201b BD |
4906 | } |
4907 | ||
6aa8b732 AK |
4908 | static __init int alloc_kvm_area(void) |
4909 | { | |
4910 | int cpu; | |
4911 | ||
3230bb47 | 4912 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
4913 | struct vmcs *vmcs; |
4914 | ||
491a6038 | 4915 | vmcs = alloc_vmcs_cpu(false, cpu); |
6aa8b732 AK |
4916 | if (!vmcs) { |
4917 | free_kvm_area(); | |
4918 | return -ENOMEM; | |
4919 | } | |
4920 | ||
2307af1c LA |
4921 | /* |
4922 | * When eVMCS is enabled, alloc_vmcs_cpu() sets | |
4923 | * vmcs->revision_id to KVM_EVMCS_VERSION instead of | |
4924 | * revision_id reported by MSR_IA32_VMX_BASIC. | |
4925 | * | |
4926 | * However, even though not explictly documented by | |
4927 | * TLFS, VMXArea passed as VMXON argument should | |
4928 | * still be marked with revision_id reported by | |
4929 | * physical CPU. | |
4930 | */ | |
4931 | if (static_branch_unlikely(&enable_evmcs)) | |
392b2f25 | 4932 | vmcs->hdr.revision_id = vmcs_config.revision_id; |
2307af1c | 4933 | |
6aa8b732 AK |
4934 | per_cpu(vmxarea, cpu) = vmcs; |
4935 | } | |
4936 | return 0; | |
4937 | } | |
4938 | ||
91b0aa2c | 4939 | static void fix_pmode_seg(struct kvm_vcpu *vcpu, int seg, |
d99e4152 | 4940 | struct kvm_segment *save) |
6aa8b732 | 4941 | { |
d99e4152 GN |
4942 | if (!emulate_invalid_guest_state) { |
4943 | /* | |
4944 | * CS and SS RPL should be equal during guest entry according | |
4945 | * to VMX spec, but in reality it is not always so. Since vcpu | |
4946 | * is in the middle of the transition from real mode to | |
4947 | * protected mode it is safe to assume that RPL 0 is a good | |
4948 | * default value. | |
4949 | */ | |
4950 | if (seg == VCPU_SREG_CS || seg == VCPU_SREG_SS) | |
b32a9918 NA |
4951 | save->selector &= ~SEGMENT_RPL_MASK; |
4952 | save->dpl = save->selector & SEGMENT_RPL_MASK; | |
d99e4152 | 4953 | save->s = 1; |
6aa8b732 | 4954 | } |
d99e4152 | 4955 | vmx_set_segment(vcpu, save, seg); |
6aa8b732 AK |
4956 | } |
4957 | ||
4958 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
4959 | { | |
4960 | unsigned long flags; | |
a89a8fb9 | 4961 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 4962 | |
d99e4152 GN |
4963 | /* |
4964 | * Update real mode segment cache. It may be not up-to-date if sement | |
4965 | * register was written while vcpu was in a guest mode. | |
4966 | */ | |
4967 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES); | |
4968 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS); | |
4969 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS); | |
4970 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS); | |
4971 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS); | |
4972 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS); | |
4973 | ||
7ffd92c5 | 4974 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 4975 | |
2fb92db1 AK |
4976 | vmx_segment_cache_clear(vmx); |
4977 | ||
f5f7b2fe | 4978 | vmx_set_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR); |
6aa8b732 AK |
4979 | |
4980 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
4981 | flags &= RMODE_GUEST_OWNED_EFLAGS_BITS; |
4982 | flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
6aa8b732 AK |
4983 | vmcs_writel(GUEST_RFLAGS, flags); |
4984 | ||
66aee91a RR |
4985 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
4986 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
4987 | |
4988 | update_exception_bitmap(vcpu); | |
4989 | ||
91b0aa2c GN |
4990 | fix_pmode_seg(vcpu, VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]); |
4991 | fix_pmode_seg(vcpu, VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]); | |
4992 | fix_pmode_seg(vcpu, VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]); | |
4993 | fix_pmode_seg(vcpu, VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]); | |
4994 | fix_pmode_seg(vcpu, VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]); | |
4995 | fix_pmode_seg(vcpu, VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]); | |
6aa8b732 AK |
4996 | } |
4997 | ||
f5f7b2fe | 4998 | static void fix_rmode_seg(int seg, struct kvm_segment *save) |
6aa8b732 | 4999 | { |
772e0318 | 5000 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
d99e4152 GN |
5001 | struct kvm_segment var = *save; |
5002 | ||
5003 | var.dpl = 0x3; | |
5004 | if (seg == VCPU_SREG_CS) | |
5005 | var.type = 0x3; | |
5006 | ||
5007 | if (!emulate_invalid_guest_state) { | |
5008 | var.selector = var.base >> 4; | |
5009 | var.base = var.base & 0xffff0; | |
5010 | var.limit = 0xffff; | |
5011 | var.g = 0; | |
5012 | var.db = 0; | |
5013 | var.present = 1; | |
5014 | var.s = 1; | |
5015 | var.l = 0; | |
5016 | var.unusable = 0; | |
5017 | var.type = 0x3; | |
5018 | var.avl = 0; | |
5019 | if (save->base & 0xf) | |
5020 | printk_once(KERN_WARNING "kvm: segment base is not " | |
5021 | "paragraph aligned when entering " | |
5022 | "protected mode (seg=%d)", seg); | |
5023 | } | |
6aa8b732 | 5024 | |
d99e4152 | 5025 | vmcs_write16(sf->selector, var.selector); |
96794e4e | 5026 | vmcs_writel(sf->base, var.base); |
d99e4152 GN |
5027 | vmcs_write32(sf->limit, var.limit); |
5028 | vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(&var)); | |
6aa8b732 AK |
5029 | } |
5030 | ||
5031 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
5032 | { | |
5033 | unsigned long flags; | |
a89a8fb9 | 5034 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
40bbb9d0 | 5035 | struct kvm_vmx *kvm_vmx = to_kvm_vmx(vcpu->kvm); |
6aa8b732 | 5036 | |
f5f7b2fe AK |
5037 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR); |
5038 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES); | |
5039 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS); | |
5040 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS); | |
5041 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS); | |
c6ad1153 GN |
5042 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS); |
5043 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS); | |
f5f7b2fe | 5044 | |
7ffd92c5 | 5045 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 5046 | |
776e58ea GN |
5047 | /* |
5048 | * Very old userspace does not call KVM_SET_TSS_ADDR before entering | |
4918c6ca | 5049 | * vcpu. Warn the user that an update is overdue. |
776e58ea | 5050 | */ |
40bbb9d0 | 5051 | if (!kvm_vmx->tss_addr) |
776e58ea GN |
5052 | printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be " |
5053 | "called before entering vcpu\n"); | |
776e58ea | 5054 | |
2fb92db1 AK |
5055 | vmx_segment_cache_clear(vmx); |
5056 | ||
40bbb9d0 | 5057 | vmcs_writel(GUEST_TR_BASE, kvm_vmx->tss_addr); |
6aa8b732 | 5058 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
6aa8b732 AK |
5059 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
5060 | ||
5061 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 | 5062 | vmx->rmode.save_rflags = flags; |
6aa8b732 | 5063 | |
053de044 | 5064 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
5065 | |
5066 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 5067 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
5068 | update_exception_bitmap(vcpu); |
5069 | ||
d99e4152 GN |
5070 | fix_rmode_seg(VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]); |
5071 | fix_rmode_seg(VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]); | |
5072 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]); | |
5073 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]); | |
5074 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]); | |
5075 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]); | |
b246dd5d | 5076 | |
8668a3c4 | 5077 | kvm_mmu_reset_context(vcpu); |
6aa8b732 AK |
5078 | } |
5079 | ||
401d10de AS |
5080 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
5081 | { | |
5082 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
5083 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
5084 | ||
5085 | if (!msr) | |
5086 | return; | |
401d10de | 5087 | |
f6801dff | 5088 | vcpu->arch.efer = efer; |
401d10de | 5089 | if (efer & EFER_LMA) { |
2961e876 | 5090 | vm_entry_controls_setbit(to_vmx(vcpu), VM_ENTRY_IA32E_MODE); |
401d10de AS |
5091 | msr->data = efer; |
5092 | } else { | |
2961e876 | 5093 | vm_entry_controls_clearbit(to_vmx(vcpu), VM_ENTRY_IA32E_MODE); |
401d10de AS |
5094 | |
5095 | msr->data = efer & ~EFER_LME; | |
5096 | } | |
5097 | setup_msrs(vmx); | |
5098 | } | |
5099 | ||
05b3e0c2 | 5100 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
5101 | |
5102 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
5103 | { | |
5104 | u32 guest_tr_ar; | |
5105 | ||
2fb92db1 AK |
5106 | vmx_segment_cache_clear(to_vmx(vcpu)); |
5107 | ||
6aa8b732 | 5108 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
4d283ec9 | 5109 | if ((guest_tr_ar & VMX_AR_TYPE_MASK) != VMX_AR_TYPE_BUSY_64_TSS) { |
bd80158a JK |
5110 | pr_debug_ratelimited("%s: tss fixup for long mode. \n", |
5111 | __func__); | |
6aa8b732 | 5112 | vmcs_write32(GUEST_TR_AR_BYTES, |
4d283ec9 AL |
5113 | (guest_tr_ar & ~VMX_AR_TYPE_MASK) |
5114 | | VMX_AR_TYPE_BUSY_64_TSS); | |
6aa8b732 | 5115 | } |
da38f438 | 5116 | vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA); |
6aa8b732 AK |
5117 | } |
5118 | ||
5119 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
5120 | { | |
2961e876 | 5121 | vm_entry_controls_clearbit(to_vmx(vcpu), VM_ENTRY_IA32E_MODE); |
da38f438 | 5122 | vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA); |
6aa8b732 AK |
5123 | } |
5124 | ||
5125 | #endif | |
5126 | ||
c2ba05cc WL |
5127 | static inline void __vmx_flush_tlb(struct kvm_vcpu *vcpu, int vpid, |
5128 | bool invalidate_gpa) | |
2384d2b3 | 5129 | { |
c2ba05cc | 5130 | if (enable_ept && (invalidate_gpa || !enable_vpid)) { |
44dd3ffa | 5131 | if (!VALID_PAGE(vcpu->arch.mmu->root_hpa)) |
dd180b3e | 5132 | return; |
44dd3ffa VK |
5133 | ept_sync_context(construct_eptp(vcpu, |
5134 | vcpu->arch.mmu->root_hpa)); | |
f0b98c02 JM |
5135 | } else { |
5136 | vpid_sync_context(vpid); | |
dd180b3e | 5137 | } |
2384d2b3 SY |
5138 | } |
5139 | ||
c2ba05cc | 5140 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa) |
dd5f5341 | 5141 | { |
c2ba05cc | 5142 | __vmx_flush_tlb(vcpu, to_vmx(vcpu)->vpid, invalidate_gpa); |
dd5f5341 WL |
5143 | } |
5144 | ||
faff8758 JS |
5145 | static void vmx_flush_tlb_gva(struct kvm_vcpu *vcpu, gva_t addr) |
5146 | { | |
5147 | int vpid = to_vmx(vcpu)->vpid; | |
5148 | ||
5149 | if (!vpid_sync_vcpu_addr(vpid, addr)) | |
5150 | vpid_sync_context(vpid); | |
5151 | ||
5152 | /* | |
5153 | * If VPIDs are not supported or enabled, then the above is a no-op. | |
5154 | * But we don't really need a TLB flush in that case anyway, because | |
5155 | * each VM entry/exit includes an implicit flush when VPID is 0. | |
5156 | */ | |
5157 | } | |
5158 | ||
e8467fda AK |
5159 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
5160 | { | |
5161 | ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; | |
5162 | ||
5163 | vcpu->arch.cr0 &= ~cr0_guest_owned_bits; | |
5164 | vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; | |
5165 | } | |
5166 | ||
aff48baa AK |
5167 | static void vmx_decache_cr3(struct kvm_vcpu *vcpu) |
5168 | { | |
b4d18517 | 5169 | if (enable_unrestricted_guest || (enable_ept && is_paging(vcpu))) |
aff48baa AK |
5170 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); |
5171 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
5172 | } | |
5173 | ||
25c4c276 | 5174 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 5175 | { |
fc78f519 AK |
5176 | ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; |
5177 | ||
5178 | vcpu->arch.cr4 &= ~cr4_guest_owned_bits; | |
5179 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits; | |
399badf3 AK |
5180 | } |
5181 | ||
1439442c SY |
5182 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
5183 | { | |
d0d538b9 GN |
5184 | struct kvm_mmu *mmu = vcpu->arch.walk_mmu; |
5185 | ||
6de4f3ad AK |
5186 | if (!test_bit(VCPU_EXREG_PDPTR, |
5187 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
5188 | return; | |
5189 | ||
1439442c | 5190 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
d0d538b9 GN |
5191 | vmcs_write64(GUEST_PDPTR0, mmu->pdptrs[0]); |
5192 | vmcs_write64(GUEST_PDPTR1, mmu->pdptrs[1]); | |
5193 | vmcs_write64(GUEST_PDPTR2, mmu->pdptrs[2]); | |
5194 | vmcs_write64(GUEST_PDPTR3, mmu->pdptrs[3]); | |
1439442c SY |
5195 | } |
5196 | } | |
5197 | ||
8f5d549f AK |
5198 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
5199 | { | |
d0d538b9 GN |
5200 | struct kvm_mmu *mmu = vcpu->arch.walk_mmu; |
5201 | ||
8f5d549f | 5202 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
d0d538b9 GN |
5203 | mmu->pdptrs[0] = vmcs_read64(GUEST_PDPTR0); |
5204 | mmu->pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
5205 | mmu->pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
5206 | mmu->pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
8f5d549f | 5207 | } |
6de4f3ad AK |
5208 | |
5209 | __set_bit(VCPU_EXREG_PDPTR, | |
5210 | (unsigned long *)&vcpu->arch.regs_avail); | |
5211 | __set_bit(VCPU_EXREG_PDPTR, | |
5212 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
5213 | } |
5214 | ||
3899152c DM |
5215 | static bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) |
5216 | { | |
6677f3da PB |
5217 | u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0; |
5218 | u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1; | |
3899152c DM |
5219 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
5220 | ||
6677f3da | 5221 | if (to_vmx(vcpu)->nested.msrs.secondary_ctls_high & |
3899152c DM |
5222 | SECONDARY_EXEC_UNRESTRICTED_GUEST && |
5223 | nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST)) | |
5224 | fixed0 &= ~(X86_CR0_PE | X86_CR0_PG); | |
5225 | ||
5226 | return fixed_bits_valid(val, fixed0, fixed1); | |
5227 | } | |
5228 | ||
5229 | static bool nested_host_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val) | |
5230 | { | |
6677f3da PB |
5231 | u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0; |
5232 | u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1; | |
3899152c DM |
5233 | |
5234 | return fixed_bits_valid(val, fixed0, fixed1); | |
5235 | } | |
5236 | ||
5237 | static bool nested_cr4_valid(struct kvm_vcpu *vcpu, unsigned long val) | |
5238 | { | |
6677f3da PB |
5239 | u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr4_fixed0; |
5240 | u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr4_fixed1; | |
3899152c DM |
5241 | |
5242 | return fixed_bits_valid(val, fixed0, fixed1); | |
5243 | } | |
5244 | ||
5245 | /* No difference in the restrictions on guest and host CR4 in VMX operation. */ | |
5246 | #define nested_guest_cr4_valid nested_cr4_valid | |
5247 | #define nested_host_cr4_valid nested_cr4_valid | |
5248 | ||
5e1746d6 | 5249 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1439442c SY |
5250 | |
5251 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
5252 | unsigned long cr0, | |
5253 | struct kvm_vcpu *vcpu) | |
5254 | { | |
5233dd51 MT |
5255 | if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail)) |
5256 | vmx_decache_cr3(vcpu); | |
1439442c SY |
5257 | if (!(cr0 & X86_CR0_PG)) { |
5258 | /* From paging/starting to nonpaging */ | |
5259 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 5260 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
5261 | (CPU_BASED_CR3_LOAD_EXITING | |
5262 | CPU_BASED_CR3_STORE_EXITING)); | |
5263 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 5264 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c SY |
5265 | } else if (!is_paging(vcpu)) { |
5266 | /* From nonpaging to paging */ | |
5267 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 5268 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
5269 | ~(CPU_BASED_CR3_LOAD_EXITING | |
5270 | CPU_BASED_CR3_STORE_EXITING)); | |
5271 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 5272 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c | 5273 | } |
95eb84a7 SY |
5274 | |
5275 | if (!(cr0 & X86_CR0_WP)) | |
5276 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
5277 | } |
5278 | ||
6aa8b732 AK |
5279 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
5280 | { | |
7ffd92c5 | 5281 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
5282 | unsigned long hw_cr0; |
5283 | ||
3de6347b | 5284 | hw_cr0 = (cr0 & ~KVM_VM_CR0_ALWAYS_OFF); |
3a624e29 | 5285 | if (enable_unrestricted_guest) |
5037878e | 5286 | hw_cr0 |= KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; |
218e763f | 5287 | else { |
5037878e | 5288 | hw_cr0 |= KVM_VM_CR0_ALWAYS_ON; |
1439442c | 5289 | |
218e763f GN |
5290 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
5291 | enter_pmode(vcpu); | |
6aa8b732 | 5292 | |
218e763f GN |
5293 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
5294 | enter_rmode(vcpu); | |
5295 | } | |
6aa8b732 | 5296 | |
05b3e0c2 | 5297 | #ifdef CONFIG_X86_64 |
f6801dff | 5298 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 5299 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 5300 | enter_lmode(vcpu); |
707d92fa | 5301 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
5302 | exit_lmode(vcpu); |
5303 | } | |
5304 | #endif | |
5305 | ||
b4d18517 | 5306 | if (enable_ept && !enable_unrestricted_guest) |
1439442c SY |
5307 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
5308 | ||
6aa8b732 | 5309 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 5310 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 5311 | vcpu->arch.cr0 = cr0; |
14168786 GN |
5312 | |
5313 | /* depends on vcpu->arch.cr0 to be set to a new value */ | |
5314 | vmx->emulation_required = emulation_required(vcpu); | |
6aa8b732 AK |
5315 | } |
5316 | ||
855feb67 YZ |
5317 | static int get_ept_level(struct kvm_vcpu *vcpu) |
5318 | { | |
5319 | if (cpu_has_vmx_ept_5levels() && (cpuid_maxphyaddr(vcpu) > 48)) | |
5320 | return 5; | |
5321 | return 4; | |
5322 | } | |
5323 | ||
995f00a6 | 5324 | static u64 construct_eptp(struct kvm_vcpu *vcpu, unsigned long root_hpa) |
1439442c | 5325 | { |
855feb67 YZ |
5326 | u64 eptp = VMX_EPTP_MT_WB; |
5327 | ||
5328 | eptp |= (get_ept_level(vcpu) == 5) ? VMX_EPTP_PWL_5 : VMX_EPTP_PWL_4; | |
1439442c | 5329 | |
995f00a6 PF |
5330 | if (enable_ept_ad_bits && |
5331 | (!is_guest_mode(vcpu) || nested_ept_ad_enabled(vcpu))) | |
bb97a016 | 5332 | eptp |= VMX_EPTP_AD_ENABLE_BIT; |
1439442c SY |
5333 | eptp |= (root_hpa & PAGE_MASK); |
5334 | ||
5335 | return eptp; | |
5336 | } | |
5337 | ||
6aa8b732 AK |
5338 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
5339 | { | |
877ad952 | 5340 | struct kvm *kvm = vcpu->kvm; |
1439442c SY |
5341 | unsigned long guest_cr3; |
5342 | u64 eptp; | |
5343 | ||
5344 | guest_cr3 = cr3; | |
089d034e | 5345 | if (enable_ept) { |
995f00a6 | 5346 | eptp = construct_eptp(vcpu, cr3); |
1439442c | 5347 | vmcs_write64(EPT_POINTER, eptp); |
877ad952 TL |
5348 | |
5349 | if (kvm_x86_ops->tlb_remote_flush) { | |
5350 | spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock); | |
5351 | to_vmx(vcpu)->ept_pointer = eptp; | |
5352 | to_kvm_vmx(kvm)->ept_pointers_match | |
5353 | = EPT_POINTERS_CHECK; | |
5354 | spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock); | |
5355 | } | |
5356 | ||
e90008df SC |
5357 | if (enable_unrestricted_guest || is_paging(vcpu) || |
5358 | is_guest_mode(vcpu)) | |
59ab5a8f JK |
5359 | guest_cr3 = kvm_read_cr3(vcpu); |
5360 | else | |
877ad952 | 5361 | guest_cr3 = to_kvm_vmx(kvm)->ept_identity_map_addr; |
7c93be44 | 5362 | ept_load_pdptrs(vcpu); |
1439442c SY |
5363 | } |
5364 | ||
1439442c | 5365 | vmcs_writel(GUEST_CR3, guest_cr3); |
6aa8b732 AK |
5366 | } |
5367 | ||
5e1746d6 | 5368 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
6aa8b732 | 5369 | { |
085e68ee BS |
5370 | /* |
5371 | * Pass through host's Machine Check Enable value to hw_cr4, which | |
5372 | * is in force while we are in guest mode. Do not let guests control | |
5373 | * this bit, even if host CR4.MCE == 0. | |
5374 | */ | |
5dc1f044 SC |
5375 | unsigned long hw_cr4; |
5376 | ||
5377 | hw_cr4 = (cr4_read_shadow() & X86_CR4_MCE) | (cr4 & ~X86_CR4_MCE); | |
5378 | if (enable_unrestricted_guest) | |
5379 | hw_cr4 |= KVM_VM_CR4_ALWAYS_ON_UNRESTRICTED_GUEST; | |
5380 | else if (to_vmx(vcpu)->rmode.vm86_active) | |
5381 | hw_cr4 |= KVM_RMODE_VM_CR4_ALWAYS_ON; | |
5382 | else | |
5383 | hw_cr4 |= KVM_PMODE_VM_CR4_ALWAYS_ON; | |
1439442c | 5384 | |
64f7a115 SC |
5385 | if (!boot_cpu_has(X86_FEATURE_UMIP) && vmx_umip_emulated()) { |
5386 | if (cr4 & X86_CR4_UMIP) { | |
5387 | vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL, | |
0367f205 | 5388 | SECONDARY_EXEC_DESC); |
64f7a115 SC |
5389 | hw_cr4 &= ~X86_CR4_UMIP; |
5390 | } else if (!is_guest_mode(vcpu) || | |
5391 | !nested_cpu_has2(get_vmcs12(vcpu), SECONDARY_EXEC_DESC)) | |
5392 | vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL, | |
5393 | SECONDARY_EXEC_DESC); | |
5394 | } | |
0367f205 | 5395 | |
5e1746d6 NHE |
5396 | if (cr4 & X86_CR4_VMXE) { |
5397 | /* | |
5398 | * To use VMXON (and later other VMX instructions), a guest | |
5399 | * must first be able to turn on cr4.VMXE (see handle_vmon()). | |
5400 | * So basically the check on whether to allow nested VMX | |
5bea5123 PB |
5401 | * is here. We operate under the default treatment of SMM, |
5402 | * so VMX cannot be enabled under SMM. | |
5e1746d6 | 5403 | */ |
5bea5123 | 5404 | if (!nested_vmx_allowed(vcpu) || is_smm(vcpu)) |
5e1746d6 | 5405 | return 1; |
1a0d74e6 | 5406 | } |
3899152c DM |
5407 | |
5408 | if (to_vmx(vcpu)->nested.vmxon && !nested_cr4_valid(vcpu, cr4)) | |
5e1746d6 NHE |
5409 | return 1; |
5410 | ||
ad312c7c | 5411 | vcpu->arch.cr4 = cr4; |
5dc1f044 SC |
5412 | |
5413 | if (!enable_unrestricted_guest) { | |
5414 | if (enable_ept) { | |
5415 | if (!is_paging(vcpu)) { | |
5416 | hw_cr4 &= ~X86_CR4_PAE; | |
5417 | hw_cr4 |= X86_CR4_PSE; | |
5418 | } else if (!(cr4 & X86_CR4_PAE)) { | |
5419 | hw_cr4 &= ~X86_CR4_PAE; | |
5420 | } | |
bc23008b | 5421 | } |
1439442c | 5422 | |
656ec4a4 | 5423 | /* |
ddba2628 HH |
5424 | * SMEP/SMAP/PKU is disabled if CPU is in non-paging mode in |
5425 | * hardware. To emulate this behavior, SMEP/SMAP/PKU needs | |
5426 | * to be manually disabled when guest switches to non-paging | |
5427 | * mode. | |
5428 | * | |
5429 | * If !enable_unrestricted_guest, the CPU is always running | |
5430 | * with CR0.PG=1 and CR4 needs to be modified. | |
5431 | * If enable_unrestricted_guest, the CPU automatically | |
5432 | * disables SMEP/SMAP/PKU when the guest sets CR0.PG=0. | |
656ec4a4 | 5433 | */ |
5dc1f044 SC |
5434 | if (!is_paging(vcpu)) |
5435 | hw_cr4 &= ~(X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE); | |
5436 | } | |
656ec4a4 | 5437 | |
1439442c SY |
5438 | vmcs_writel(CR4_READ_SHADOW, cr4); |
5439 | vmcs_writel(GUEST_CR4, hw_cr4); | |
5e1746d6 | 5440 | return 0; |
6aa8b732 AK |
5441 | } |
5442 | ||
6aa8b732 AK |
5443 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
5444 | struct kvm_segment *var, int seg) | |
5445 | { | |
a9179499 | 5446 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 AK |
5447 | u32 ar; |
5448 | ||
c6ad1153 | 5449 | if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) { |
f5f7b2fe | 5450 | *var = vmx->rmode.segs[seg]; |
a9179499 | 5451 | if (seg == VCPU_SREG_TR |
2fb92db1 | 5452 | || var->selector == vmx_read_guest_seg_selector(vmx, seg)) |
f5f7b2fe | 5453 | return; |
1390a28b AK |
5454 | var->base = vmx_read_guest_seg_base(vmx, seg); |
5455 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
5456 | return; | |
a9179499 | 5457 | } |
2fb92db1 AK |
5458 | var->base = vmx_read_guest_seg_base(vmx, seg); |
5459 | var->limit = vmx_read_guest_seg_limit(vmx, seg); | |
5460 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
5461 | ar = vmx_read_guest_seg_ar(vmx, seg); | |
03617c18 | 5462 | var->unusable = (ar >> 16) & 1; |
6aa8b732 AK |
5463 | var->type = ar & 15; |
5464 | var->s = (ar >> 4) & 1; | |
5465 | var->dpl = (ar >> 5) & 3; | |
03617c18 GN |
5466 | /* |
5467 | * Some userspaces do not preserve unusable property. Since usable | |
5468 | * segment has to be present according to VMX spec we can use present | |
5469 | * property to amend userspace bug by making unusable segment always | |
5470 | * nonpresent. vmx_segment_access_rights() already marks nonpresent | |
5471 | * segment as unusable. | |
5472 | */ | |
5473 | var->present = !var->unusable; | |
6aa8b732 AK |
5474 | var->avl = (ar >> 12) & 1; |
5475 | var->l = (ar >> 13) & 1; | |
5476 | var->db = (ar >> 14) & 1; | |
5477 | var->g = (ar >> 15) & 1; | |
6aa8b732 AK |
5478 | } |
5479 | ||
a9179499 AK |
5480 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
5481 | { | |
a9179499 AK |
5482 | struct kvm_segment s; |
5483 | ||
5484 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
5485 | vmx_get_segment(vcpu, &s, seg); | |
5486 | return s.base; | |
5487 | } | |
2fb92db1 | 5488 | return vmx_read_guest_seg_base(to_vmx(vcpu), seg); |
a9179499 AK |
5489 | } |
5490 | ||
b09408d0 | 5491 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
2e4d2653 | 5492 | { |
b09408d0 MT |
5493 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
5494 | ||
ae9fedc7 | 5495 | if (unlikely(vmx->rmode.vm86_active)) |
2e4d2653 | 5496 | return 0; |
ae9fedc7 PB |
5497 | else { |
5498 | int ar = vmx_read_guest_seg_ar(vmx, VCPU_SREG_SS); | |
4d283ec9 | 5499 | return VMX_AR_DPL(ar); |
69c73028 | 5500 | } |
69c73028 AK |
5501 | } |
5502 | ||
653e3108 | 5503 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 5504 | { |
6aa8b732 AK |
5505 | u32 ar; |
5506 | ||
f0495f9b | 5507 | if (var->unusable || !var->present) |
6aa8b732 AK |
5508 | ar = 1 << 16; |
5509 | else { | |
5510 | ar = var->type & 15; | |
5511 | ar |= (var->s & 1) << 4; | |
5512 | ar |= (var->dpl & 3) << 5; | |
5513 | ar |= (var->present & 1) << 7; | |
5514 | ar |= (var->avl & 1) << 12; | |
5515 | ar |= (var->l & 1) << 13; | |
5516 | ar |= (var->db & 1) << 14; | |
5517 | ar |= (var->g & 1) << 15; | |
5518 | } | |
653e3108 AK |
5519 | |
5520 | return ar; | |
5521 | } | |
5522 | ||
5523 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
5524 | struct kvm_segment *var, int seg) | |
5525 | { | |
7ffd92c5 | 5526 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
772e0318 | 5527 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
653e3108 | 5528 | |
2fb92db1 AK |
5529 | vmx_segment_cache_clear(vmx); |
5530 | ||
1ecd50a9 GN |
5531 | if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) { |
5532 | vmx->rmode.segs[seg] = *var; | |
5533 | if (seg == VCPU_SREG_TR) | |
5534 | vmcs_write16(sf->selector, var->selector); | |
5535 | else if (var->s) | |
5536 | fix_rmode_seg(seg, &vmx->rmode.segs[seg]); | |
d99e4152 | 5537 | goto out; |
653e3108 | 5538 | } |
1ecd50a9 | 5539 | |
653e3108 AK |
5540 | vmcs_writel(sf->base, var->base); |
5541 | vmcs_write32(sf->limit, var->limit); | |
5542 | vmcs_write16(sf->selector, var->selector); | |
3a624e29 NK |
5543 | |
5544 | /* | |
5545 | * Fix the "Accessed" bit in AR field of segment registers for older | |
5546 | * qemu binaries. | |
5547 | * IA32 arch specifies that at the time of processor reset the | |
5548 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
0fa06071 | 5549 | * is setting it to 0 in the userland code. This causes invalid guest |
3a624e29 NK |
5550 | * state vmexit when "unrestricted guest" mode is turned on. |
5551 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
5552 | * tree. Newer qemu binaries with that qemu fix would not need this | |
5553 | * kvm hack. | |
5554 | */ | |
5555 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
f924d66d | 5556 | var->type |= 0x1; /* Accessed */ |
3a624e29 | 5557 | |
f924d66d | 5558 | vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(var)); |
d99e4152 GN |
5559 | |
5560 | out: | |
98eb2f8b | 5561 | vmx->emulation_required = emulation_required(vcpu); |
6aa8b732 AK |
5562 | } |
5563 | ||
6aa8b732 AK |
5564 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
5565 | { | |
2fb92db1 | 5566 | u32 ar = vmx_read_guest_seg_ar(to_vmx(vcpu), VCPU_SREG_CS); |
6aa8b732 AK |
5567 | |
5568 | *db = (ar >> 14) & 1; | |
5569 | *l = (ar >> 13) & 1; | |
5570 | } | |
5571 | ||
89a27f4d | 5572 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 5573 | { |
89a27f4d GN |
5574 | dt->size = vmcs_read32(GUEST_IDTR_LIMIT); |
5575 | dt->address = vmcs_readl(GUEST_IDTR_BASE); | |
6aa8b732 AK |
5576 | } |
5577 | ||
89a27f4d | 5578 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 5579 | { |
89a27f4d GN |
5580 | vmcs_write32(GUEST_IDTR_LIMIT, dt->size); |
5581 | vmcs_writel(GUEST_IDTR_BASE, dt->address); | |
6aa8b732 AK |
5582 | } |
5583 | ||
89a27f4d | 5584 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 5585 | { |
89a27f4d GN |
5586 | dt->size = vmcs_read32(GUEST_GDTR_LIMIT); |
5587 | dt->address = vmcs_readl(GUEST_GDTR_BASE); | |
6aa8b732 AK |
5588 | } |
5589 | ||
89a27f4d | 5590 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 5591 | { |
89a27f4d GN |
5592 | vmcs_write32(GUEST_GDTR_LIMIT, dt->size); |
5593 | vmcs_writel(GUEST_GDTR_BASE, dt->address); | |
6aa8b732 AK |
5594 | } |
5595 | ||
648dfaa7 MG |
5596 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
5597 | { | |
5598 | struct kvm_segment var; | |
5599 | u32 ar; | |
5600 | ||
5601 | vmx_get_segment(vcpu, &var, seg); | |
07f42f5f | 5602 | var.dpl = 0x3; |
0647f4aa GN |
5603 | if (seg == VCPU_SREG_CS) |
5604 | var.type = 0x3; | |
648dfaa7 MG |
5605 | ar = vmx_segment_access_rights(&var); |
5606 | ||
5607 | if (var.base != (var.selector << 4)) | |
5608 | return false; | |
89efbed0 | 5609 | if (var.limit != 0xffff) |
648dfaa7 | 5610 | return false; |
07f42f5f | 5611 | if (ar != 0xf3) |
648dfaa7 MG |
5612 | return false; |
5613 | ||
5614 | return true; | |
5615 | } | |
5616 | ||
5617 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
5618 | { | |
5619 | struct kvm_segment cs; | |
5620 | unsigned int cs_rpl; | |
5621 | ||
5622 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
b32a9918 | 5623 | cs_rpl = cs.selector & SEGMENT_RPL_MASK; |
648dfaa7 | 5624 | |
1872a3f4 AK |
5625 | if (cs.unusable) |
5626 | return false; | |
4d283ec9 | 5627 | if (~cs.type & (VMX_AR_TYPE_CODE_MASK|VMX_AR_TYPE_ACCESSES_MASK)) |
648dfaa7 MG |
5628 | return false; |
5629 | if (!cs.s) | |
5630 | return false; | |
4d283ec9 | 5631 | if (cs.type & VMX_AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
5632 | if (cs.dpl > cs_rpl) |
5633 | return false; | |
1872a3f4 | 5634 | } else { |
648dfaa7 MG |
5635 | if (cs.dpl != cs_rpl) |
5636 | return false; | |
5637 | } | |
5638 | if (!cs.present) | |
5639 | return false; | |
5640 | ||
5641 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
5642 | return true; | |
5643 | } | |
5644 | ||
5645 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
5646 | { | |
5647 | struct kvm_segment ss; | |
5648 | unsigned int ss_rpl; | |
5649 | ||
5650 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
b32a9918 | 5651 | ss_rpl = ss.selector & SEGMENT_RPL_MASK; |
648dfaa7 | 5652 | |
1872a3f4 AK |
5653 | if (ss.unusable) |
5654 | return true; | |
5655 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
5656 | return false; |
5657 | if (!ss.s) | |
5658 | return false; | |
5659 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
5660 | return false; | |
5661 | if (!ss.present) | |
5662 | return false; | |
5663 | ||
5664 | return true; | |
5665 | } | |
5666 | ||
5667 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
5668 | { | |
5669 | struct kvm_segment var; | |
5670 | unsigned int rpl; | |
5671 | ||
5672 | vmx_get_segment(vcpu, &var, seg); | |
b32a9918 | 5673 | rpl = var.selector & SEGMENT_RPL_MASK; |
648dfaa7 | 5674 | |
1872a3f4 AK |
5675 | if (var.unusable) |
5676 | return true; | |
648dfaa7 MG |
5677 | if (!var.s) |
5678 | return false; | |
5679 | if (!var.present) | |
5680 | return false; | |
4d283ec9 | 5681 | if (~var.type & (VMX_AR_TYPE_CODE_MASK|VMX_AR_TYPE_WRITEABLE_MASK)) { |
648dfaa7 MG |
5682 | if (var.dpl < rpl) /* DPL < RPL */ |
5683 | return false; | |
5684 | } | |
5685 | ||
5686 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
5687 | * rights flags | |
5688 | */ | |
5689 | return true; | |
5690 | } | |
5691 | ||
5692 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
5693 | { | |
5694 | struct kvm_segment tr; | |
5695 | ||
5696 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
5697 | ||
1872a3f4 AK |
5698 | if (tr.unusable) |
5699 | return false; | |
b32a9918 | 5700 | if (tr.selector & SEGMENT_TI_MASK) /* TI = 1 */ |
648dfaa7 | 5701 | return false; |
1872a3f4 | 5702 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
5703 | return false; |
5704 | if (!tr.present) | |
5705 | return false; | |
5706 | ||
5707 | return true; | |
5708 | } | |
5709 | ||
5710 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
5711 | { | |
5712 | struct kvm_segment ldtr; | |
5713 | ||
5714 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
5715 | ||
1872a3f4 AK |
5716 | if (ldtr.unusable) |
5717 | return true; | |
b32a9918 | 5718 | if (ldtr.selector & SEGMENT_TI_MASK) /* TI = 1 */ |
648dfaa7 MG |
5719 | return false; |
5720 | if (ldtr.type != 2) | |
5721 | return false; | |
5722 | if (!ldtr.present) | |
5723 | return false; | |
5724 | ||
5725 | return true; | |
5726 | } | |
5727 | ||
5728 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
5729 | { | |
5730 | struct kvm_segment cs, ss; | |
5731 | ||
5732 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
5733 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
5734 | ||
b32a9918 NA |
5735 | return ((cs.selector & SEGMENT_RPL_MASK) == |
5736 | (ss.selector & SEGMENT_RPL_MASK)); | |
648dfaa7 MG |
5737 | } |
5738 | ||
5739 | /* | |
5740 | * Check if guest state is valid. Returns true if valid, false if | |
5741 | * not. | |
5742 | * We assume that registers are always usable | |
5743 | */ | |
5744 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
5745 | { | |
c5e97c80 GN |
5746 | if (enable_unrestricted_guest) |
5747 | return true; | |
5748 | ||
648dfaa7 | 5749 | /* real mode guest state checks */ |
f13882d8 | 5750 | if (!is_protmode(vcpu) || (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) { |
648dfaa7 MG |
5751 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) |
5752 | return false; | |
5753 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
5754 | return false; | |
5755 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
5756 | return false; | |
5757 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
5758 | return false; | |
5759 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
5760 | return false; | |
5761 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
5762 | return false; | |
5763 | } else { | |
5764 | /* protected mode guest state checks */ | |
5765 | if (!cs_ss_rpl_check(vcpu)) | |
5766 | return false; | |
5767 | if (!code_segment_valid(vcpu)) | |
5768 | return false; | |
5769 | if (!stack_segment_valid(vcpu)) | |
5770 | return false; | |
5771 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
5772 | return false; | |
5773 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
5774 | return false; | |
5775 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
5776 | return false; | |
5777 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
5778 | return false; | |
5779 | if (!tr_valid(vcpu)) | |
5780 | return false; | |
5781 | if (!ldtr_valid(vcpu)) | |
5782 | return false; | |
5783 | } | |
5784 | /* TODO: | |
5785 | * - Add checks on RIP | |
5786 | * - Add checks on RFLAGS | |
5787 | */ | |
5788 | ||
5789 | return true; | |
5790 | } | |
5791 | ||
5fa99cbe JM |
5792 | static bool page_address_valid(struct kvm_vcpu *vcpu, gpa_t gpa) |
5793 | { | |
5794 | return PAGE_ALIGNED(gpa) && !(gpa >> cpuid_maxphyaddr(vcpu)); | |
5795 | } | |
5796 | ||
d77c26fc | 5797 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 5798 | { |
40dcaa9f | 5799 | gfn_t fn; |
195aefde | 5800 | u16 data = 0; |
1f755a82 | 5801 | int idx, r; |
6aa8b732 | 5802 | |
40dcaa9f | 5803 | idx = srcu_read_lock(&kvm->srcu); |
40bbb9d0 | 5804 | fn = to_kvm_vmx(kvm)->tss_addr >> PAGE_SHIFT; |
195aefde IE |
5805 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
5806 | if (r < 0) | |
10589a46 | 5807 | goto out; |
195aefde | 5808 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
5809 | r = kvm_write_guest_page(kvm, fn++, &data, |
5810 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 5811 | if (r < 0) |
10589a46 | 5812 | goto out; |
195aefde IE |
5813 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
5814 | if (r < 0) | |
10589a46 | 5815 | goto out; |
195aefde IE |
5816 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
5817 | if (r < 0) | |
10589a46 | 5818 | goto out; |
195aefde | 5819 | data = ~0; |
10589a46 MT |
5820 | r = kvm_write_guest_page(kvm, fn, &data, |
5821 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
5822 | sizeof(u8)); | |
10589a46 | 5823 | out: |
40dcaa9f | 5824 | srcu_read_unlock(&kvm->srcu, idx); |
1f755a82 | 5825 | return r; |
6aa8b732 AK |
5826 | } |
5827 | ||
b7ebfb05 SY |
5828 | static int init_rmode_identity_map(struct kvm *kvm) |
5829 | { | |
40bbb9d0 | 5830 | struct kvm_vmx *kvm_vmx = to_kvm_vmx(kvm); |
f51770ed | 5831 | int i, idx, r = 0; |
ba049e93 | 5832 | kvm_pfn_t identity_map_pfn; |
b7ebfb05 SY |
5833 | u32 tmp; |
5834 | ||
40bbb9d0 | 5835 | /* Protect kvm_vmx->ept_identity_pagetable_done. */ |
a255d479 TC |
5836 | mutex_lock(&kvm->slots_lock); |
5837 | ||
40bbb9d0 | 5838 | if (likely(kvm_vmx->ept_identity_pagetable_done)) |
a255d479 | 5839 | goto out2; |
a255d479 | 5840 | |
40bbb9d0 SC |
5841 | if (!kvm_vmx->ept_identity_map_addr) |
5842 | kvm_vmx->ept_identity_map_addr = VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
5843 | identity_map_pfn = kvm_vmx->ept_identity_map_addr >> PAGE_SHIFT; | |
a255d479 | 5844 | |
d8a6e365 | 5845 | r = __x86_set_memory_region(kvm, IDENTITY_PAGETABLE_PRIVATE_MEMSLOT, |
40bbb9d0 | 5846 | kvm_vmx->ept_identity_map_addr, PAGE_SIZE); |
f51770ed | 5847 | if (r < 0) |
a255d479 TC |
5848 | goto out2; |
5849 | ||
40dcaa9f | 5850 | idx = srcu_read_lock(&kvm->srcu); |
b7ebfb05 SY |
5851 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
5852 | if (r < 0) | |
5853 | goto out; | |
5854 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
5855 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
5856 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
5857 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
5858 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
5859 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
5860 | if (r < 0) | |
5861 | goto out; | |
5862 | } | |
40bbb9d0 | 5863 | kvm_vmx->ept_identity_pagetable_done = true; |
f51770ed | 5864 | |
b7ebfb05 | 5865 | out: |
40dcaa9f | 5866 | srcu_read_unlock(&kvm->srcu, idx); |
a255d479 TC |
5867 | |
5868 | out2: | |
5869 | mutex_unlock(&kvm->slots_lock); | |
f51770ed | 5870 | return r; |
b7ebfb05 SY |
5871 | } |
5872 | ||
6aa8b732 AK |
5873 | static void seg_setup(int seg) |
5874 | { | |
772e0318 | 5875 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
3a624e29 | 5876 | unsigned int ar; |
6aa8b732 AK |
5877 | |
5878 | vmcs_write16(sf->selector, 0); | |
5879 | vmcs_writel(sf->base, 0); | |
5880 | vmcs_write32(sf->limit, 0xffff); | |
d54d07b2 GN |
5881 | ar = 0x93; |
5882 | if (seg == VCPU_SREG_CS) | |
5883 | ar |= 0x08; /* code segment */ | |
3a624e29 NK |
5884 | |
5885 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
5886 | } |
5887 | ||
f78e0e2e SY |
5888 | static int alloc_apic_access_page(struct kvm *kvm) |
5889 | { | |
4484141a | 5890 | struct page *page; |
f78e0e2e SY |
5891 | int r = 0; |
5892 | ||
79fac95e | 5893 | mutex_lock(&kvm->slots_lock); |
c24ae0dc | 5894 | if (kvm->arch.apic_access_page_done) |
f78e0e2e | 5895 | goto out; |
1d8007bd PB |
5896 | r = __x86_set_memory_region(kvm, APIC_ACCESS_PAGE_PRIVATE_MEMSLOT, |
5897 | APIC_DEFAULT_PHYS_BASE, PAGE_SIZE); | |
f78e0e2e SY |
5898 | if (r) |
5899 | goto out; | |
72dc67a6 | 5900 | |
73a6d941 | 5901 | page = gfn_to_page(kvm, APIC_DEFAULT_PHYS_BASE >> PAGE_SHIFT); |
4484141a XG |
5902 | if (is_error_page(page)) { |
5903 | r = -EFAULT; | |
5904 | goto out; | |
5905 | } | |
5906 | ||
c24ae0dc TC |
5907 | /* |
5908 | * Do not pin the page in memory, so that memory hot-unplug | |
5909 | * is able to migrate it. | |
5910 | */ | |
5911 | put_page(page); | |
5912 | kvm->arch.apic_access_page_done = true; | |
f78e0e2e | 5913 | out: |
79fac95e | 5914 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
5915 | return r; |
5916 | } | |
5917 | ||
991e7a0e | 5918 | static int allocate_vpid(void) |
2384d2b3 SY |
5919 | { |
5920 | int vpid; | |
5921 | ||
919818ab | 5922 | if (!enable_vpid) |
991e7a0e | 5923 | return 0; |
2384d2b3 SY |
5924 | spin_lock(&vmx_vpid_lock); |
5925 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
991e7a0e | 5926 | if (vpid < VMX_NR_VPIDS) |
2384d2b3 | 5927 | __set_bit(vpid, vmx_vpid_bitmap); |
991e7a0e WL |
5928 | else |
5929 | vpid = 0; | |
2384d2b3 | 5930 | spin_unlock(&vmx_vpid_lock); |
991e7a0e | 5931 | return vpid; |
2384d2b3 SY |
5932 | } |
5933 | ||
991e7a0e | 5934 | static void free_vpid(int vpid) |
cdbecfc3 | 5935 | { |
991e7a0e | 5936 | if (!enable_vpid || vpid == 0) |
cdbecfc3 LJ |
5937 | return; |
5938 | spin_lock(&vmx_vpid_lock); | |
991e7a0e | 5939 | __clear_bit(vpid, vmx_vpid_bitmap); |
cdbecfc3 LJ |
5940 | spin_unlock(&vmx_vpid_lock); |
5941 | } | |
5942 | ||
904e14fb PB |
5943 | static void __always_inline vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, |
5944 | u32 msr, int type) | |
25c5f225 | 5945 | { |
3e7c73e9 | 5946 | int f = sizeof(unsigned long); |
25c5f225 SY |
5947 | |
5948 | if (!cpu_has_vmx_msr_bitmap()) | |
5949 | return; | |
5950 | ||
ceef7d10 VK |
5951 | if (static_branch_unlikely(&enable_evmcs)) |
5952 | evmcs_touch_msr_bitmap(); | |
5953 | ||
25c5f225 SY |
5954 | /* |
5955 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
5956 | * have the write-low and read-high bitmap offsets the wrong way round. | |
5957 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
5958 | */ | |
25c5f225 | 5959 | if (msr <= 0x1fff) { |
8d14695f YZ |
5960 | if (type & MSR_TYPE_R) |
5961 | /* read-low */ | |
5962 | __clear_bit(msr, msr_bitmap + 0x000 / f); | |
5963 | ||
5964 | if (type & MSR_TYPE_W) | |
5965 | /* write-low */ | |
5966 | __clear_bit(msr, msr_bitmap + 0x800 / f); | |
5967 | ||
25c5f225 SY |
5968 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
5969 | msr &= 0x1fff; | |
8d14695f YZ |
5970 | if (type & MSR_TYPE_R) |
5971 | /* read-high */ | |
5972 | __clear_bit(msr, msr_bitmap + 0x400 / f); | |
5973 | ||
5974 | if (type & MSR_TYPE_W) | |
5975 | /* write-high */ | |
5976 | __clear_bit(msr, msr_bitmap + 0xc00 / f); | |
5977 | ||
5978 | } | |
5979 | } | |
5980 | ||
904e14fb PB |
5981 | static void __always_inline vmx_enable_intercept_for_msr(unsigned long *msr_bitmap, |
5982 | u32 msr, int type) | |
5983 | { | |
5984 | int f = sizeof(unsigned long); | |
5985 | ||
5986 | if (!cpu_has_vmx_msr_bitmap()) | |
5987 | return; | |
5988 | ||
ceef7d10 VK |
5989 | if (static_branch_unlikely(&enable_evmcs)) |
5990 | evmcs_touch_msr_bitmap(); | |
5991 | ||
904e14fb PB |
5992 | /* |
5993 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
5994 | * have the write-low and read-high bitmap offsets the wrong way round. | |
5995 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
5996 | */ | |
5997 | if (msr <= 0x1fff) { | |
5998 | if (type & MSR_TYPE_R) | |
5999 | /* read-low */ | |
6000 | __set_bit(msr, msr_bitmap + 0x000 / f); | |
6001 | ||
6002 | if (type & MSR_TYPE_W) | |
6003 | /* write-low */ | |
6004 | __set_bit(msr, msr_bitmap + 0x800 / f); | |
6005 | ||
6006 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
6007 | msr &= 0x1fff; | |
6008 | if (type & MSR_TYPE_R) | |
6009 | /* read-high */ | |
6010 | __set_bit(msr, msr_bitmap + 0x400 / f); | |
6011 | ||
6012 | if (type & MSR_TYPE_W) | |
6013 | /* write-high */ | |
6014 | __set_bit(msr, msr_bitmap + 0xc00 / f); | |
6015 | ||
6016 | } | |
6017 | } | |
6018 | ||
6019 | static void __always_inline vmx_set_intercept_for_msr(unsigned long *msr_bitmap, | |
6020 | u32 msr, int type, bool value) | |
6021 | { | |
6022 | if (value) | |
6023 | vmx_enable_intercept_for_msr(msr_bitmap, msr, type); | |
6024 | else | |
6025 | vmx_disable_intercept_for_msr(msr_bitmap, msr, type); | |
6026 | } | |
6027 | ||
f2b93280 WV |
6028 | /* |
6029 | * If a msr is allowed by L0, we should check whether it is allowed by L1. | |
6030 | * The corresponding bit will be cleared unless both of L0 and L1 allow it. | |
6031 | */ | |
6032 | static void nested_vmx_disable_intercept_for_msr(unsigned long *msr_bitmap_l1, | |
6033 | unsigned long *msr_bitmap_nested, | |
6034 | u32 msr, int type) | |
6035 | { | |
6036 | int f = sizeof(unsigned long); | |
6037 | ||
f2b93280 WV |
6038 | /* |
6039 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
6040 | * have the write-low and read-high bitmap offsets the wrong way round. | |
6041 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
6042 | */ | |
6043 | if (msr <= 0x1fff) { | |
6044 | if (type & MSR_TYPE_R && | |
6045 | !test_bit(msr, msr_bitmap_l1 + 0x000 / f)) | |
6046 | /* read-low */ | |
6047 | __clear_bit(msr, msr_bitmap_nested + 0x000 / f); | |
6048 | ||
6049 | if (type & MSR_TYPE_W && | |
6050 | !test_bit(msr, msr_bitmap_l1 + 0x800 / f)) | |
6051 | /* write-low */ | |
6052 | __clear_bit(msr, msr_bitmap_nested + 0x800 / f); | |
6053 | ||
6054 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
6055 | msr &= 0x1fff; | |
6056 | if (type & MSR_TYPE_R && | |
6057 | !test_bit(msr, msr_bitmap_l1 + 0x400 / f)) | |
6058 | /* read-high */ | |
6059 | __clear_bit(msr, msr_bitmap_nested + 0x400 / f); | |
6060 | ||
6061 | if (type & MSR_TYPE_W && | |
6062 | !test_bit(msr, msr_bitmap_l1 + 0xc00 / f)) | |
6063 | /* write-high */ | |
6064 | __clear_bit(msr, msr_bitmap_nested + 0xc00 / f); | |
6065 | ||
6066 | } | |
6067 | } | |
6068 | ||
904e14fb | 6069 | static u8 vmx_msr_bitmap_mode(struct kvm_vcpu *vcpu) |
5897297b | 6070 | { |
904e14fb PB |
6071 | u8 mode = 0; |
6072 | ||
6073 | if (cpu_has_secondary_exec_ctrls() && | |
6074 | (vmcs_read32(SECONDARY_VM_EXEC_CONTROL) & | |
6075 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE)) { | |
6076 | mode |= MSR_BITMAP_MODE_X2APIC; | |
6077 | if (enable_apicv && kvm_vcpu_apicv_active(vcpu)) | |
6078 | mode |= MSR_BITMAP_MODE_X2APIC_APICV; | |
6079 | } | |
6080 | ||
904e14fb | 6081 | return mode; |
8d14695f YZ |
6082 | } |
6083 | ||
904e14fb PB |
6084 | #define X2APIC_MSR(r) (APIC_BASE_MSR + ((r) >> 4)) |
6085 | ||
6086 | static void vmx_update_msr_bitmap_x2apic(unsigned long *msr_bitmap, | |
6087 | u8 mode) | |
8d14695f | 6088 | { |
904e14fb PB |
6089 | int msr; |
6090 | ||
6091 | for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) { | |
6092 | unsigned word = msr / BITS_PER_LONG; | |
6093 | msr_bitmap[word] = (mode & MSR_BITMAP_MODE_X2APIC_APICV) ? 0 : ~0; | |
6094 | msr_bitmap[word + (0x800 / sizeof(long))] = ~0; | |
6095 | } | |
6096 | ||
6097 | if (mode & MSR_BITMAP_MODE_X2APIC) { | |
6098 | /* | |
6099 | * TPR reads and writes can be virtualized even if virtual interrupt | |
6100 | * delivery is not in use. | |
6101 | */ | |
6102 | vmx_disable_intercept_for_msr(msr_bitmap, X2APIC_MSR(APIC_TASKPRI), MSR_TYPE_RW); | |
6103 | if (mode & MSR_BITMAP_MODE_X2APIC_APICV) { | |
6104 | vmx_enable_intercept_for_msr(msr_bitmap, X2APIC_MSR(APIC_TMCCT), MSR_TYPE_R); | |
6105 | vmx_disable_intercept_for_msr(msr_bitmap, X2APIC_MSR(APIC_EOI), MSR_TYPE_W); | |
6106 | vmx_disable_intercept_for_msr(msr_bitmap, X2APIC_MSR(APIC_SELF_IPI), MSR_TYPE_W); | |
6107 | } | |
f6e90f9e | 6108 | } |
5897297b AK |
6109 | } |
6110 | ||
904e14fb PB |
6111 | static void vmx_update_msr_bitmap(struct kvm_vcpu *vcpu) |
6112 | { | |
6113 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6114 | unsigned long *msr_bitmap = vmx->vmcs01.msr_bitmap; | |
6115 | u8 mode = vmx_msr_bitmap_mode(vcpu); | |
6116 | u8 changed = mode ^ vmx->msr_bitmap_mode; | |
6117 | ||
6118 | if (!changed) | |
6119 | return; | |
6120 | ||
904e14fb PB |
6121 | if (changed & (MSR_BITMAP_MODE_X2APIC | MSR_BITMAP_MODE_X2APIC_APICV)) |
6122 | vmx_update_msr_bitmap_x2apic(msr_bitmap, mode); | |
6123 | ||
6124 | vmx->msr_bitmap_mode = mode; | |
6125 | } | |
6126 | ||
b2a05fef | 6127 | static bool vmx_get_enable_apicv(struct kvm_vcpu *vcpu) |
d50ab6c1 | 6128 | { |
d62caabb | 6129 | return enable_apicv; |
d50ab6c1 PB |
6130 | } |
6131 | ||
c9f04407 DM |
6132 | static void nested_mark_vmcs12_pages_dirty(struct kvm_vcpu *vcpu) |
6133 | { | |
6134 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
6135 | gfn_t gfn; | |
6136 | ||
6137 | /* | |
6138 | * Don't need to mark the APIC access page dirty; it is never | |
6139 | * written to by the CPU during APIC virtualization. | |
6140 | */ | |
6141 | ||
6142 | if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) { | |
6143 | gfn = vmcs12->virtual_apic_page_addr >> PAGE_SHIFT; | |
6144 | kvm_vcpu_mark_page_dirty(vcpu, gfn); | |
6145 | } | |
6146 | ||
6147 | if (nested_cpu_has_posted_intr(vmcs12)) { | |
6148 | gfn = vmcs12->posted_intr_desc_addr >> PAGE_SHIFT; | |
6149 | kvm_vcpu_mark_page_dirty(vcpu, gfn); | |
6150 | } | |
6151 | } | |
6152 | ||
6153 | ||
6342c50a | 6154 | static void vmx_complete_nested_posted_interrupt(struct kvm_vcpu *vcpu) |
705699a1 WV |
6155 | { |
6156 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6157 | int max_irr; | |
6158 | void *vapic_page; | |
6159 | u16 status; | |
6160 | ||
c9f04407 DM |
6161 | if (!vmx->nested.pi_desc || !vmx->nested.pi_pending) |
6162 | return; | |
705699a1 | 6163 | |
c9f04407 DM |
6164 | vmx->nested.pi_pending = false; |
6165 | if (!pi_test_and_clear_on(vmx->nested.pi_desc)) | |
6166 | return; | |
705699a1 | 6167 | |
c9f04407 DM |
6168 | max_irr = find_last_bit((unsigned long *)vmx->nested.pi_desc->pir, 256); |
6169 | if (max_irr != 256) { | |
705699a1 | 6170 | vapic_page = kmap(vmx->nested.virtual_apic_page); |
e7387b0e LA |
6171 | __kvm_apic_update_irr(vmx->nested.pi_desc->pir, |
6172 | vapic_page, &max_irr); | |
705699a1 WV |
6173 | kunmap(vmx->nested.virtual_apic_page); |
6174 | ||
6175 | status = vmcs_read16(GUEST_INTR_STATUS); | |
6176 | if ((u8)max_irr > ((u8)status & 0xff)) { | |
6177 | status &= ~0xff; | |
6178 | status |= (u8)max_irr; | |
6179 | vmcs_write16(GUEST_INTR_STATUS, status); | |
6180 | } | |
6181 | } | |
c9f04407 DM |
6182 | |
6183 | nested_mark_vmcs12_pages_dirty(vcpu); | |
705699a1 WV |
6184 | } |
6185 | ||
7e712684 PB |
6186 | static u8 vmx_get_rvi(void) |
6187 | { | |
6188 | return vmcs_read16(GUEST_INTR_STATUS) & 0xff; | |
6189 | } | |
6190 | ||
e6c67d8c LA |
6191 | static bool vmx_guest_apic_has_interrupt(struct kvm_vcpu *vcpu) |
6192 | { | |
6193 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6194 | void *vapic_page; | |
6195 | u32 vppr; | |
6196 | int rvi; | |
6197 | ||
6198 | if (WARN_ON_ONCE(!is_guest_mode(vcpu)) || | |
6199 | !nested_cpu_has_vid(get_vmcs12(vcpu)) || | |
6200 | WARN_ON_ONCE(!vmx->nested.virtual_apic_page)) | |
6201 | return false; | |
6202 | ||
7e712684 | 6203 | rvi = vmx_get_rvi(); |
e6c67d8c LA |
6204 | |
6205 | vapic_page = kmap(vmx->nested.virtual_apic_page); | |
6206 | vppr = *((u32 *)(vapic_page + APIC_PROCPRI)); | |
6207 | kunmap(vmx->nested.virtual_apic_page); | |
6208 | ||
6209 | return ((rvi & 0xf0) > (vppr & 0xf0)); | |
6210 | } | |
6211 | ||
06a5524f WV |
6212 | static inline bool kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu, |
6213 | bool nested) | |
21bc8dc5 RK |
6214 | { |
6215 | #ifdef CONFIG_SMP | |
06a5524f WV |
6216 | int pi_vec = nested ? POSTED_INTR_NESTED_VECTOR : POSTED_INTR_VECTOR; |
6217 | ||
21bc8dc5 | 6218 | if (vcpu->mode == IN_GUEST_MODE) { |
28b835d6 | 6219 | /* |
5753743f HZ |
6220 | * The vector of interrupt to be delivered to vcpu had |
6221 | * been set in PIR before this function. | |
6222 | * | |
6223 | * Following cases will be reached in this block, and | |
6224 | * we always send a notification event in all cases as | |
6225 | * explained below. | |
6226 | * | |
6227 | * Case 1: vcpu keeps in non-root mode. Sending a | |
6228 | * notification event posts the interrupt to vcpu. | |
6229 | * | |
6230 | * Case 2: vcpu exits to root mode and is still | |
6231 | * runnable. PIR will be synced to vIRR before the | |
6232 | * next vcpu entry. Sending a notification event in | |
6233 | * this case has no effect, as vcpu is not in root | |
6234 | * mode. | |
28b835d6 | 6235 | * |
5753743f HZ |
6236 | * Case 3: vcpu exits to root mode and is blocked. |
6237 | * vcpu_block() has already synced PIR to vIRR and | |
6238 | * never blocks vcpu if vIRR is not cleared. Therefore, | |
6239 | * a blocked vcpu here does not wait for any requested | |
6240 | * interrupts in PIR, and sending a notification event | |
6241 | * which has no effect is safe here. | |
28b835d6 | 6242 | */ |
28b835d6 | 6243 | |
06a5524f | 6244 | apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), pi_vec); |
21bc8dc5 RK |
6245 | return true; |
6246 | } | |
6247 | #endif | |
6248 | return false; | |
6249 | } | |
6250 | ||
705699a1 WV |
6251 | static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu, |
6252 | int vector) | |
6253 | { | |
6254 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6255 | ||
6256 | if (is_guest_mode(vcpu) && | |
6257 | vector == vmx->nested.posted_intr_nv) { | |
705699a1 WV |
6258 | /* |
6259 | * If a posted intr is not recognized by hardware, | |
6260 | * we will accomplish it in the next vmentry. | |
6261 | */ | |
6262 | vmx->nested.pi_pending = true; | |
6263 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6b697711 LA |
6264 | /* the PIR and ON have been set by L1. */ |
6265 | if (!kvm_vcpu_trigger_posted_interrupt(vcpu, true)) | |
6266 | kvm_vcpu_kick(vcpu); | |
705699a1 WV |
6267 | return 0; |
6268 | } | |
6269 | return -1; | |
6270 | } | |
a20ed54d YZ |
6271 | /* |
6272 | * Send interrupt to vcpu via posted interrupt way. | |
6273 | * 1. If target vcpu is running(non-root mode), send posted interrupt | |
6274 | * notification to vcpu and hardware will sync PIR to vIRR atomically. | |
6275 | * 2. If target vcpu isn't running(root mode), kick it to pick up the | |
6276 | * interrupt from PIR in next vmentry. | |
6277 | */ | |
6278 | static void vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) | |
6279 | { | |
6280 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6281 | int r; | |
6282 | ||
705699a1 WV |
6283 | r = vmx_deliver_nested_posted_interrupt(vcpu, vector); |
6284 | if (!r) | |
6285 | return; | |
6286 | ||
a20ed54d YZ |
6287 | if (pi_test_and_set_pir(vector, &vmx->pi_desc)) |
6288 | return; | |
6289 | ||
b95234c8 PB |
6290 | /* If a previous notification has sent the IPI, nothing to do. */ |
6291 | if (pi_test_and_set_on(&vmx->pi_desc)) | |
6292 | return; | |
6293 | ||
06a5524f | 6294 | if (!kvm_vcpu_trigger_posted_interrupt(vcpu, false)) |
a20ed54d YZ |
6295 | kvm_vcpu_kick(vcpu); |
6296 | } | |
6297 | ||
a3a8ff8e NHE |
6298 | /* |
6299 | * Set up the vmcs's constant host-state fields, i.e., host-state fields that | |
6300 | * will not change in the lifetime of the guest. | |
6301 | * Note that host-state that does change is set elsewhere. E.g., host-state | |
6302 | * that is set differently for each CPU is set in vmx_vcpu_load(), not here. | |
6303 | */ | |
a547c6db | 6304 | static void vmx_set_constant_host_state(struct vcpu_vmx *vmx) |
a3a8ff8e NHE |
6305 | { |
6306 | u32 low32, high32; | |
6307 | unsigned long tmpl; | |
6308 | struct desc_ptr dt; | |
d6e41f11 | 6309 | unsigned long cr0, cr3, cr4; |
a3a8ff8e | 6310 | |
04ac88ab AL |
6311 | cr0 = read_cr0(); |
6312 | WARN_ON(cr0 & X86_CR0_TS); | |
6313 | vmcs_writel(HOST_CR0, cr0); /* 22.2.3 */ | |
d6e41f11 AL |
6314 | |
6315 | /* | |
6316 | * Save the most likely value for this task's CR3 in the VMCS. | |
6317 | * We can't use __get_current_cr3_fast() because we're not atomic. | |
6318 | */ | |
6c690ee1 | 6319 | cr3 = __read_cr3(); |
d6e41f11 | 6320 | vmcs_writel(HOST_CR3, cr3); /* 22.2.3 FIXME: shadow tables */ |
d7ee039e | 6321 | vmx->loaded_vmcs->host_state.cr3 = cr3; |
a3a8ff8e | 6322 | |
d974baa3 | 6323 | /* Save the most likely value for this task's CR4 in the VMCS. */ |
1e02ce4c | 6324 | cr4 = cr4_read_shadow(); |
d974baa3 | 6325 | vmcs_writel(HOST_CR4, cr4); /* 22.2.3, 22.2.5 */ |
d7ee039e | 6326 | vmx->loaded_vmcs->host_state.cr4 = cr4; |
d974baa3 | 6327 | |
a3a8ff8e | 6328 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ |
b2da15ac AK |
6329 | #ifdef CONFIG_X86_64 |
6330 | /* | |
6331 | * Load null selectors, so we can avoid reloading them in | |
6d6095bd SC |
6332 | * vmx_prepare_switch_to_host(), in case userspace uses |
6333 | * the null selectors too (the expected case). | |
b2da15ac AK |
6334 | */ |
6335 | vmcs_write16(HOST_DS_SELECTOR, 0); | |
6336 | vmcs_write16(HOST_ES_SELECTOR, 0); | |
6337 | #else | |
a3a8ff8e NHE |
6338 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
6339 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
b2da15ac | 6340 | #endif |
a3a8ff8e NHE |
6341 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
6342 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
6343 | ||
87930019 | 6344 | store_idt(&dt); |
a3a8ff8e | 6345 | vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */ |
a547c6db | 6346 | vmx->host_idt_base = dt.address; |
a3a8ff8e | 6347 | |
83287ea4 | 6348 | vmcs_writel(HOST_RIP, vmx_return); /* 22.2.5 */ |
a3a8ff8e NHE |
6349 | |
6350 | rdmsr(MSR_IA32_SYSENTER_CS, low32, high32); | |
6351 | vmcs_write32(HOST_IA32_SYSENTER_CS, low32); | |
6352 | rdmsrl(MSR_IA32_SYSENTER_EIP, tmpl); | |
6353 | vmcs_writel(HOST_IA32_SYSENTER_EIP, tmpl); /* 22.2.3 */ | |
6354 | ||
6355 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { | |
6356 | rdmsr(MSR_IA32_CR_PAT, low32, high32); | |
6357 | vmcs_write64(HOST_IA32_PAT, low32 | ((u64) high32 << 32)); | |
6358 | } | |
5a5e8a15 SC |
6359 | |
6360 | if (cpu_has_load_ia32_efer) | |
6361 | vmcs_write64(HOST_IA32_EFER, host_efer); | |
a3a8ff8e NHE |
6362 | } |
6363 | ||
bf8179a0 NHE |
6364 | static void set_cr4_guest_host_mask(struct vcpu_vmx *vmx) |
6365 | { | |
6366 | vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS; | |
6367 | if (enable_ept) | |
6368 | vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE; | |
fe3ef05c NHE |
6369 | if (is_guest_mode(&vmx->vcpu)) |
6370 | vmx->vcpu.arch.cr4_guest_owned_bits &= | |
6371 | ~get_vmcs12(&vmx->vcpu)->cr4_guest_host_mask; | |
bf8179a0 NHE |
6372 | vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits); |
6373 | } | |
6374 | ||
01e439be YZ |
6375 | static u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx) |
6376 | { | |
6377 | u32 pin_based_exec_ctrl = vmcs_config.pin_based_exec_ctrl; | |
6378 | ||
d62caabb | 6379 | if (!kvm_vcpu_apicv_active(&vmx->vcpu)) |
01e439be | 6380 | pin_based_exec_ctrl &= ~PIN_BASED_POSTED_INTR; |
d02fcf50 PB |
6381 | |
6382 | if (!enable_vnmi) | |
6383 | pin_based_exec_ctrl &= ~PIN_BASED_VIRTUAL_NMIS; | |
6384 | ||
64672c95 YJ |
6385 | /* Enable the preemption timer dynamically */ |
6386 | pin_based_exec_ctrl &= ~PIN_BASED_VMX_PREEMPTION_TIMER; | |
01e439be YZ |
6387 | return pin_based_exec_ctrl; |
6388 | } | |
6389 | ||
d62caabb AS |
6390 | static void vmx_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu) |
6391 | { | |
6392 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6393 | ||
6394 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_ctrl(vmx)); | |
3ce424e4 RK |
6395 | if (cpu_has_secondary_exec_ctrls()) { |
6396 | if (kvm_vcpu_apicv_active(vcpu)) | |
6397 | vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL, | |
6398 | SECONDARY_EXEC_APIC_REGISTER_VIRT | | |
6399 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
6400 | else | |
6401 | vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL, | |
6402 | SECONDARY_EXEC_APIC_REGISTER_VIRT | | |
6403 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
6404 | } | |
6405 | ||
6406 | if (cpu_has_vmx_msr_bitmap()) | |
904e14fb | 6407 | vmx_update_msr_bitmap(vcpu); |
d62caabb AS |
6408 | } |
6409 | ||
bf8179a0 NHE |
6410 | static u32 vmx_exec_control(struct vcpu_vmx *vmx) |
6411 | { | |
6412 | u32 exec_control = vmcs_config.cpu_based_exec_ctrl; | |
d16c293e PB |
6413 | |
6414 | if (vmx->vcpu.arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT) | |
6415 | exec_control &= ~CPU_BASED_MOV_DR_EXITING; | |
6416 | ||
35754c98 | 6417 | if (!cpu_need_tpr_shadow(&vmx->vcpu)) { |
bf8179a0 NHE |
6418 | exec_control &= ~CPU_BASED_TPR_SHADOW; |
6419 | #ifdef CONFIG_X86_64 | |
6420 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
6421 | CPU_BASED_CR8_LOAD_EXITING; | |
6422 | #endif | |
6423 | } | |
6424 | if (!enable_ept) | |
6425 | exec_control |= CPU_BASED_CR3_STORE_EXITING | | |
6426 | CPU_BASED_CR3_LOAD_EXITING | | |
6427 | CPU_BASED_INVLPG_EXITING; | |
4d5422ce WL |
6428 | if (kvm_mwait_in_guest(vmx->vcpu.kvm)) |
6429 | exec_control &= ~(CPU_BASED_MWAIT_EXITING | | |
6430 | CPU_BASED_MONITOR_EXITING); | |
caa057a2 WL |
6431 | if (kvm_hlt_in_guest(vmx->vcpu.kvm)) |
6432 | exec_control &= ~CPU_BASED_HLT_EXITING; | |
bf8179a0 NHE |
6433 | return exec_control; |
6434 | } | |
6435 | ||
45ec368c | 6436 | static bool vmx_rdrand_supported(void) |
bf8179a0 | 6437 | { |
45ec368c | 6438 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
736fdf72 | 6439 | SECONDARY_EXEC_RDRAND_EXITING; |
45ec368c JM |
6440 | } |
6441 | ||
75f4fc8d JM |
6442 | static bool vmx_rdseed_supported(void) |
6443 | { | |
6444 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
736fdf72 | 6445 | SECONDARY_EXEC_RDSEED_EXITING; |
75f4fc8d JM |
6446 | } |
6447 | ||
80154d77 | 6448 | static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx) |
bf8179a0 | 6449 | { |
80154d77 PB |
6450 | struct kvm_vcpu *vcpu = &vmx->vcpu; |
6451 | ||
bf8179a0 | 6452 | u32 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; |
0367f205 | 6453 | |
80154d77 | 6454 | if (!cpu_need_virtualize_apic_accesses(vcpu)) |
bf8179a0 NHE |
6455 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; |
6456 | if (vmx->vpid == 0) | |
6457 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
6458 | if (!enable_ept) { | |
6459 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; | |
6460 | enable_unrestricted_guest = 0; | |
6461 | } | |
6462 | if (!enable_unrestricted_guest) | |
6463 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
b31c114b | 6464 | if (kvm_pause_in_guest(vmx->vcpu.kvm)) |
bf8179a0 | 6465 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; |
80154d77 | 6466 | if (!kvm_vcpu_apicv_active(vcpu)) |
c7c9c56c YZ |
6467 | exec_control &= ~(SECONDARY_EXEC_APIC_REGISTER_VIRT | |
6468 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
8d14695f | 6469 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; |
0367f205 PB |
6470 | |
6471 | /* SECONDARY_EXEC_DESC is enabled/disabled on writes to CR4.UMIP, | |
6472 | * in vmx_set_cr4. */ | |
6473 | exec_control &= ~SECONDARY_EXEC_DESC; | |
6474 | ||
abc4fc58 AG |
6475 | /* SECONDARY_EXEC_SHADOW_VMCS is enabled when L1 executes VMPTRLD |
6476 | (handle_vmptrld). | |
6477 | We can NOT enable shadow_vmcs here because we don't have yet | |
6478 | a current VMCS12 | |
6479 | */ | |
6480 | exec_control &= ~SECONDARY_EXEC_SHADOW_VMCS; | |
a3eaa864 KH |
6481 | |
6482 | if (!enable_pml) | |
6483 | exec_control &= ~SECONDARY_EXEC_ENABLE_PML; | |
843e4330 | 6484 | |
3db13480 PB |
6485 | if (vmx_xsaves_supported()) { |
6486 | /* Exposing XSAVES only when XSAVE is exposed */ | |
6487 | bool xsaves_enabled = | |
6488 | guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && | |
6489 | guest_cpuid_has(vcpu, X86_FEATURE_XSAVES); | |
6490 | ||
6491 | if (!xsaves_enabled) | |
6492 | exec_control &= ~SECONDARY_EXEC_XSAVES; | |
6493 | ||
6494 | if (nested) { | |
6495 | if (xsaves_enabled) | |
6677f3da | 6496 | vmx->nested.msrs.secondary_ctls_high |= |
3db13480 PB |
6497 | SECONDARY_EXEC_XSAVES; |
6498 | else | |
6677f3da | 6499 | vmx->nested.msrs.secondary_ctls_high &= |
3db13480 PB |
6500 | ~SECONDARY_EXEC_XSAVES; |
6501 | } | |
6502 | } | |
6503 | ||
80154d77 PB |
6504 | if (vmx_rdtscp_supported()) { |
6505 | bool rdtscp_enabled = guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP); | |
6506 | if (!rdtscp_enabled) | |
6507 | exec_control &= ~SECONDARY_EXEC_RDTSCP; | |
6508 | ||
6509 | if (nested) { | |
6510 | if (rdtscp_enabled) | |
6677f3da | 6511 | vmx->nested.msrs.secondary_ctls_high |= |
80154d77 PB |
6512 | SECONDARY_EXEC_RDTSCP; |
6513 | else | |
6677f3da | 6514 | vmx->nested.msrs.secondary_ctls_high &= |
80154d77 PB |
6515 | ~SECONDARY_EXEC_RDTSCP; |
6516 | } | |
6517 | } | |
6518 | ||
6519 | if (vmx_invpcid_supported()) { | |
6520 | /* Exposing INVPCID only when PCID is exposed */ | |
6521 | bool invpcid_enabled = | |
6522 | guest_cpuid_has(vcpu, X86_FEATURE_INVPCID) && | |
6523 | guest_cpuid_has(vcpu, X86_FEATURE_PCID); | |
6524 | ||
6525 | if (!invpcid_enabled) { | |
6526 | exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID; | |
6527 | guest_cpuid_clear(vcpu, X86_FEATURE_INVPCID); | |
6528 | } | |
6529 | ||
6530 | if (nested) { | |
6531 | if (invpcid_enabled) | |
6677f3da | 6532 | vmx->nested.msrs.secondary_ctls_high |= |
80154d77 PB |
6533 | SECONDARY_EXEC_ENABLE_INVPCID; |
6534 | else | |
6677f3da | 6535 | vmx->nested.msrs.secondary_ctls_high &= |
80154d77 PB |
6536 | ~SECONDARY_EXEC_ENABLE_INVPCID; |
6537 | } | |
6538 | } | |
6539 | ||
45ec368c JM |
6540 | if (vmx_rdrand_supported()) { |
6541 | bool rdrand_enabled = guest_cpuid_has(vcpu, X86_FEATURE_RDRAND); | |
6542 | if (rdrand_enabled) | |
736fdf72 | 6543 | exec_control &= ~SECONDARY_EXEC_RDRAND_EXITING; |
45ec368c JM |
6544 | |
6545 | if (nested) { | |
6546 | if (rdrand_enabled) | |
6677f3da | 6547 | vmx->nested.msrs.secondary_ctls_high |= |
736fdf72 | 6548 | SECONDARY_EXEC_RDRAND_EXITING; |
45ec368c | 6549 | else |
6677f3da | 6550 | vmx->nested.msrs.secondary_ctls_high &= |
736fdf72 | 6551 | ~SECONDARY_EXEC_RDRAND_EXITING; |
45ec368c JM |
6552 | } |
6553 | } | |
6554 | ||
75f4fc8d JM |
6555 | if (vmx_rdseed_supported()) { |
6556 | bool rdseed_enabled = guest_cpuid_has(vcpu, X86_FEATURE_RDSEED); | |
6557 | if (rdseed_enabled) | |
736fdf72 | 6558 | exec_control &= ~SECONDARY_EXEC_RDSEED_EXITING; |
75f4fc8d JM |
6559 | |
6560 | if (nested) { | |
6561 | if (rdseed_enabled) | |
6677f3da | 6562 | vmx->nested.msrs.secondary_ctls_high |= |
736fdf72 | 6563 | SECONDARY_EXEC_RDSEED_EXITING; |
75f4fc8d | 6564 | else |
6677f3da | 6565 | vmx->nested.msrs.secondary_ctls_high &= |
736fdf72 | 6566 | ~SECONDARY_EXEC_RDSEED_EXITING; |
75f4fc8d JM |
6567 | } |
6568 | } | |
6569 | ||
80154d77 | 6570 | vmx->secondary_exec_control = exec_control; |
bf8179a0 NHE |
6571 | } |
6572 | ||
ce88decf XG |
6573 | static void ept_set_mmio_spte_mask(void) |
6574 | { | |
6575 | /* | |
6576 | * EPT Misconfigurations can be generated if the value of bits 2:0 | |
6577 | * of an EPT paging-structure entry is 110b (write/execute). | |
ce88decf | 6578 | */ |
dcdca5fe PF |
6579 | kvm_mmu_set_mmio_spte_mask(VMX_EPT_RWX_MASK, |
6580 | VMX_EPT_MISCONFIG_WX_VALUE); | |
ce88decf XG |
6581 | } |
6582 | ||
f53cd63c | 6583 | #define VMX_XSS_EXIT_BITMAP 0 |
6aa8b732 AK |
6584 | /* |
6585 | * Sets up the vmcs for emulated real mode. | |
6586 | */ | |
12d79917 | 6587 | static void vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 6588 | { |
6aa8b732 | 6589 | int i; |
6aa8b732 | 6590 | |
4607c2d7 | 6591 | if (enable_shadow_vmcs) { |
f4160e45 JM |
6592 | /* |
6593 | * At vCPU creation, "VMWRITE to any supported field | |
6594 | * in the VMCS" is supported, so use the more | |
6595 | * permissive vmx_vmread_bitmap to specify both read | |
6596 | * and write permissions for the shadow VMCS. | |
6597 | */ | |
4607c2d7 | 6598 | vmcs_write64(VMREAD_BITMAP, __pa(vmx_vmread_bitmap)); |
f4160e45 | 6599 | vmcs_write64(VMWRITE_BITMAP, __pa(vmx_vmread_bitmap)); |
4607c2d7 | 6600 | } |
25c5f225 | 6601 | if (cpu_has_vmx_msr_bitmap()) |
904e14fb | 6602 | vmcs_write64(MSR_BITMAP, __pa(vmx->vmcs01.msr_bitmap)); |
25c5f225 | 6603 | |
6aa8b732 AK |
6604 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
6605 | ||
6aa8b732 | 6606 | /* Control */ |
01e439be | 6607 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_ctrl(vmx)); |
64672c95 | 6608 | vmx->hv_deadline_tsc = -1; |
6e5d865c | 6609 | |
bf8179a0 | 6610 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, vmx_exec_control(vmx)); |
6aa8b732 | 6611 | |
dfa169bb | 6612 | if (cpu_has_secondary_exec_ctrls()) { |
80154d77 | 6613 | vmx_compute_secondary_exec_control(vmx); |
bf8179a0 | 6614 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, |
80154d77 | 6615 | vmx->secondary_exec_control); |
dfa169bb | 6616 | } |
f78e0e2e | 6617 | |
d62caabb | 6618 | if (kvm_vcpu_apicv_active(&vmx->vcpu)) { |
c7c9c56c YZ |
6619 | vmcs_write64(EOI_EXIT_BITMAP0, 0); |
6620 | vmcs_write64(EOI_EXIT_BITMAP1, 0); | |
6621 | vmcs_write64(EOI_EXIT_BITMAP2, 0); | |
6622 | vmcs_write64(EOI_EXIT_BITMAP3, 0); | |
6623 | ||
6624 | vmcs_write16(GUEST_INTR_STATUS, 0); | |
01e439be | 6625 | |
0bcf261c | 6626 | vmcs_write16(POSTED_INTR_NV, POSTED_INTR_VECTOR); |
01e439be | 6627 | vmcs_write64(POSTED_INTR_DESC_ADDR, __pa((&vmx->pi_desc))); |
c7c9c56c YZ |
6628 | } |
6629 | ||
b31c114b | 6630 | if (!kvm_pause_in_guest(vmx->vcpu.kvm)) { |
4b8d54f9 | 6631 | vmcs_write32(PLE_GAP, ple_gap); |
a7653ecd RK |
6632 | vmx->ple_window = ple_window; |
6633 | vmx->ple_window_dirty = true; | |
4b8d54f9 ZE |
6634 | } |
6635 | ||
c3707958 XG |
6636 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0); |
6637 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0); | |
6aa8b732 AK |
6638 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
6639 | ||
9581d442 AK |
6640 | vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */ |
6641 | vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */ | |
a547c6db | 6642 | vmx_set_constant_host_state(vmx); |
6aa8b732 AK |
6643 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ |
6644 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
6aa8b732 | 6645 | |
2a499e49 BD |
6646 | if (cpu_has_vmx_vmfunc()) |
6647 | vmcs_write64(VM_FUNCTION_CONTROL, 0); | |
6648 | ||
2cc51560 ED |
6649 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
6650 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
33966dd6 | 6651 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host.val)); |
2cc51560 | 6652 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
33966dd6 | 6653 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest.val)); |
6aa8b732 | 6654 | |
74545705 RK |
6655 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) |
6656 | vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat); | |
468d472f | 6657 | |
03916db9 | 6658 | for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i) { |
6aa8b732 AK |
6659 | u32 index = vmx_msr_index[i]; |
6660 | u32 data_low, data_high; | |
a2fa3e9f | 6661 | int j = vmx->nmsrs; |
6aa8b732 AK |
6662 | |
6663 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
6664 | continue; | |
432bd6cb AK |
6665 | if (wrmsr_safe(index, data_low, data_high) < 0) |
6666 | continue; | |
26bb0981 AK |
6667 | vmx->guest_msrs[j].index = i; |
6668 | vmx->guest_msrs[j].data = 0; | |
d5696725 | 6669 | vmx->guest_msrs[j].mask = -1ull; |
a2fa3e9f | 6670 | ++vmx->nmsrs; |
6aa8b732 | 6671 | } |
6aa8b732 | 6672 | |
5b76a3cf | 6673 | vmx->arch_capabilities = kvm_get_arch_capabilities(); |
2961e876 GN |
6674 | |
6675 | vm_exit_controls_init(vmx, vmcs_config.vmexit_ctrl); | |
6aa8b732 AK |
6676 | |
6677 | /* 22.2.1, 20.8.1 */ | |
2961e876 | 6678 | vm_entry_controls_init(vmx, vmcs_config.vmentry_ctrl); |
1c3d14fe | 6679 | |
bd7e5b08 PB |
6680 | vmx->vcpu.arch.cr0_guest_owned_bits = X86_CR0_TS; |
6681 | vmcs_writel(CR0_GUEST_HOST_MASK, ~X86_CR0_TS); | |
6682 | ||
bf8179a0 | 6683 | set_cr4_guest_host_mask(vmx); |
e00c8cf2 | 6684 | |
f53cd63c WL |
6685 | if (vmx_xsaves_supported()) |
6686 | vmcs_write64(XSS_EXIT_BITMAP, VMX_XSS_EXIT_BITMAP); | |
6687 | ||
4e59516a | 6688 | if (enable_pml) { |
4e59516a PF |
6689 | vmcs_write64(PML_ADDRESS, page_to_phys(vmx->pml_pg)); |
6690 | vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1); | |
6691 | } | |
0b665d30 SC |
6692 | |
6693 | if (cpu_has_vmx_encls_vmexit()) | |
6694 | vmcs_write64(ENCLS_EXITING_BITMAP, -1ull); | |
e00c8cf2 AK |
6695 | } |
6696 | ||
d28bc9dd | 6697 | static void vmx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) |
e00c8cf2 AK |
6698 | { |
6699 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
58cb628d | 6700 | struct msr_data apic_base_msr; |
d28bc9dd | 6701 | u64 cr0; |
e00c8cf2 | 6702 | |
7ffd92c5 | 6703 | vmx->rmode.vm86_active = 0; |
d28b387f | 6704 | vmx->spec_ctrl = 0; |
e00c8cf2 | 6705 | |
518e7b94 | 6706 | vcpu->arch.microcode_version = 0x100000000ULL; |
ad312c7c | 6707 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
d28bc9dd NA |
6708 | kvm_set_cr8(vcpu, 0); |
6709 | ||
6710 | if (!init_event) { | |
6711 | apic_base_msr.data = APIC_DEFAULT_PHYS_BASE | | |
6712 | MSR_IA32_APICBASE_ENABLE; | |
6713 | if (kvm_vcpu_is_reset_bsp(vcpu)) | |
6714 | apic_base_msr.data |= MSR_IA32_APICBASE_BSP; | |
6715 | apic_base_msr.host_initiated = true; | |
6716 | kvm_set_apic_base(vcpu, &apic_base_msr); | |
6717 | } | |
e00c8cf2 | 6718 | |
2fb92db1 AK |
6719 | vmx_segment_cache_clear(vmx); |
6720 | ||
5706be0d | 6721 | seg_setup(VCPU_SREG_CS); |
66450a21 | 6722 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
f3531054 | 6723 | vmcs_writel(GUEST_CS_BASE, 0xffff0000ul); |
e00c8cf2 AK |
6724 | |
6725 | seg_setup(VCPU_SREG_DS); | |
6726 | seg_setup(VCPU_SREG_ES); | |
6727 | seg_setup(VCPU_SREG_FS); | |
6728 | seg_setup(VCPU_SREG_GS); | |
6729 | seg_setup(VCPU_SREG_SS); | |
6730 | ||
6731 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
6732 | vmcs_writel(GUEST_TR_BASE, 0); | |
6733 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
6734 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
6735 | ||
6736 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
6737 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
6738 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
6739 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
6740 | ||
d28bc9dd NA |
6741 | if (!init_event) { |
6742 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
6743 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
6744 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
6745 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
6746 | } | |
e00c8cf2 | 6747 | |
c37c2873 | 6748 | kvm_set_rflags(vcpu, X86_EFLAGS_FIXED); |
66450a21 | 6749 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 6750 | |
e00c8cf2 AK |
6751 | vmcs_writel(GUEST_GDTR_BASE, 0); |
6752 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
6753 | ||
6754 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
6755 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
6756 | ||
443381a8 | 6757 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); |
e00c8cf2 | 6758 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
f3531054 | 6759 | vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, 0); |
a554d207 WL |
6760 | if (kvm_mpx_supported()) |
6761 | vmcs_write64(GUEST_BNDCFGS, 0); | |
e00c8cf2 | 6762 | |
e00c8cf2 AK |
6763 | setup_msrs(vmx); |
6764 | ||
6aa8b732 AK |
6765 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
6766 | ||
d28bc9dd | 6767 | if (cpu_has_vmx_tpr_shadow() && !init_event) { |
f78e0e2e | 6768 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); |
35754c98 | 6769 | if (cpu_need_tpr_shadow(vcpu)) |
f78e0e2e | 6770 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, |
d28bc9dd | 6771 | __pa(vcpu->arch.apic->regs)); |
f78e0e2e SY |
6772 | vmcs_write32(TPR_THRESHOLD, 0); |
6773 | } | |
6774 | ||
a73896cb | 6775 | kvm_make_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu); |
6aa8b732 | 6776 | |
2384d2b3 SY |
6777 | if (vmx->vpid != 0) |
6778 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
6779 | ||
d28bc9dd | 6780 | cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
d28bc9dd | 6781 | vmx->vcpu.arch.cr0 = cr0; |
f2463247 | 6782 | vmx_set_cr0(vcpu, cr0); /* enter rmode */ |
d28bc9dd | 6783 | vmx_set_cr4(vcpu, 0); |
5690891b | 6784 | vmx_set_efer(vcpu, 0); |
bd7e5b08 | 6785 | |
d28bc9dd | 6786 | update_exception_bitmap(vcpu); |
6aa8b732 | 6787 | |
dd5f5341 | 6788 | vpid_sync_context(vmx->vpid); |
caa057a2 WL |
6789 | if (init_event) |
6790 | vmx_clear_hlt(vcpu); | |
6aa8b732 AK |
6791 | } |
6792 | ||
b6f1250e NHE |
6793 | /* |
6794 | * In nested virtualization, check if L1 asked to exit on external interrupts. | |
6795 | * For most existing hypervisors, this will always return true. | |
6796 | */ | |
6797 | static bool nested_exit_on_intr(struct kvm_vcpu *vcpu) | |
6798 | { | |
6799 | return get_vmcs12(vcpu)->pin_based_vm_exec_control & | |
6800 | PIN_BASED_EXT_INTR_MASK; | |
6801 | } | |
6802 | ||
77b0f5d6 BD |
6803 | /* |
6804 | * In nested virtualization, check if L1 has set | |
6805 | * VM_EXIT_ACK_INTR_ON_EXIT | |
6806 | */ | |
6807 | static bool nested_exit_intr_ack_set(struct kvm_vcpu *vcpu) | |
6808 | { | |
6809 | return get_vmcs12(vcpu)->vm_exit_controls & | |
6810 | VM_EXIT_ACK_INTR_ON_EXIT; | |
6811 | } | |
6812 | ||
ea8ceb83 JK |
6813 | static bool nested_exit_on_nmi(struct kvm_vcpu *vcpu) |
6814 | { | |
0c7f650e | 6815 | return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu)); |
ea8ceb83 JK |
6816 | } |
6817 | ||
c9a7953f | 6818 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
3b86cd99 | 6819 | { |
47c0152e PB |
6820 | vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL, |
6821 | CPU_BASED_VIRTUAL_INTR_PENDING); | |
3b86cd99 JK |
6822 | } |
6823 | ||
c9a7953f | 6824 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
3b86cd99 | 6825 | { |
d02fcf50 | 6826 | if (!enable_vnmi || |
8a1b4392 | 6827 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) { |
c9a7953f JK |
6828 | enable_irq_window(vcpu); |
6829 | return; | |
6830 | } | |
3b86cd99 | 6831 | |
47c0152e PB |
6832 | vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL, |
6833 | CPU_BASED_VIRTUAL_NMI_PENDING); | |
3b86cd99 JK |
6834 | } |
6835 | ||
66fd3f7f | 6836 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 6837 | { |
9c8cba37 | 6838 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
6839 | uint32_t intr; |
6840 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 6841 | |
229456fc | 6842 | trace_kvm_inj_virq(irq); |
2714d1d3 | 6843 | |
fa89a817 | 6844 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 6845 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
6846 | int inc_eip = 0; |
6847 | if (vcpu->arch.interrupt.soft) | |
6848 | inc_eip = vcpu->arch.event_exit_inst_len; | |
6849 | if (kvm_inject_realmode_interrupt(vcpu, irq, inc_eip) != EMULATE_DONE) | |
a92601bb | 6850 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
85f455f7 ED |
6851 | return; |
6852 | } | |
66fd3f7f GN |
6853 | intr = irq | INTR_INFO_VALID_MASK; |
6854 | if (vcpu->arch.interrupt.soft) { | |
6855 | intr |= INTR_TYPE_SOFT_INTR; | |
6856 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
6857 | vmx->vcpu.arch.event_exit_inst_len); | |
6858 | } else | |
6859 | intr |= INTR_TYPE_EXT_INTR; | |
6860 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
caa057a2 WL |
6861 | |
6862 | vmx_clear_hlt(vcpu); | |
85f455f7 ED |
6863 | } |
6864 | ||
f08864b4 SY |
6865 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
6866 | { | |
66a5a347 JK |
6867 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6868 | ||
d02fcf50 | 6869 | if (!enable_vnmi) { |
8a1b4392 PB |
6870 | /* |
6871 | * Tracking the NMI-blocked state in software is built upon | |
6872 | * finding the next open IRQ window. This, in turn, depends on | |
6873 | * well-behaving guests: They have to keep IRQs disabled at | |
6874 | * least as long as the NMI handler runs. Otherwise we may | |
6875 | * cause NMI nesting, maybe breaking the guest. But as this is | |
6876 | * highly unlikely, we can live with the residual risk. | |
6877 | */ | |
6878 | vmx->loaded_vmcs->soft_vnmi_blocked = 1; | |
6879 | vmx->loaded_vmcs->vnmi_blocked_time = 0; | |
6880 | } | |
6881 | ||
4c4a6f79 PB |
6882 | ++vcpu->stat.nmi_injections; |
6883 | vmx->loaded_vmcs->nmi_known_unmasked = false; | |
3b86cd99 | 6884 | |
7ffd92c5 | 6885 | if (vmx->rmode.vm86_active) { |
71f9833b | 6886 | if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE) |
a92601bb | 6887 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
66a5a347 JK |
6888 | return; |
6889 | } | |
c5a6d5f7 | 6890 | |
f08864b4 SY |
6891 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
6892 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
caa057a2 WL |
6893 | |
6894 | vmx_clear_hlt(vcpu); | |
f08864b4 SY |
6895 | } |
6896 | ||
3cfc3092 JK |
6897 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu) |
6898 | { | |
4c4a6f79 PB |
6899 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6900 | bool masked; | |
6901 | ||
d02fcf50 | 6902 | if (!enable_vnmi) |
8a1b4392 | 6903 | return vmx->loaded_vmcs->soft_vnmi_blocked; |
4c4a6f79 | 6904 | if (vmx->loaded_vmcs->nmi_known_unmasked) |
9d58b931 | 6905 | return false; |
4c4a6f79 PB |
6906 | masked = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI; |
6907 | vmx->loaded_vmcs->nmi_known_unmasked = !masked; | |
6908 | return masked; | |
3cfc3092 JK |
6909 | } |
6910 | ||
6911 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
6912 | { | |
6913 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6914 | ||
d02fcf50 | 6915 | if (!enable_vnmi) { |
8a1b4392 PB |
6916 | if (vmx->loaded_vmcs->soft_vnmi_blocked != masked) { |
6917 | vmx->loaded_vmcs->soft_vnmi_blocked = masked; | |
6918 | vmx->loaded_vmcs->vnmi_blocked_time = 0; | |
6919 | } | |
6920 | } else { | |
6921 | vmx->loaded_vmcs->nmi_known_unmasked = !masked; | |
6922 | if (masked) | |
6923 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
6924 | GUEST_INTR_STATE_NMI); | |
6925 | else | |
6926 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, | |
6927 | GUEST_INTR_STATE_NMI); | |
6928 | } | |
3cfc3092 JK |
6929 | } |
6930 | ||
2505dc9f JK |
6931 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
6932 | { | |
b6b8a145 JK |
6933 | if (to_vmx(vcpu)->nested.nested_run_pending) |
6934 | return 0; | |
ea8ceb83 | 6935 | |
d02fcf50 | 6936 | if (!enable_vnmi && |
8a1b4392 PB |
6937 | to_vmx(vcpu)->loaded_vmcs->soft_vnmi_blocked) |
6938 | return 0; | |
6939 | ||
2505dc9f JK |
6940 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
6941 | (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI | |
6942 | | GUEST_INTR_STATE_NMI)); | |
6943 | } | |
6944 | ||
78646121 GN |
6945 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
6946 | { | |
b6b8a145 JK |
6947 | return (!to_vmx(vcpu)->nested.nested_run_pending && |
6948 | vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && | |
c4282df9 GN |
6949 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
6950 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
6951 | } |
6952 | ||
cbc94022 IE |
6953 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
6954 | { | |
6955 | int ret; | |
cbc94022 | 6956 | |
f7eaeb0a SC |
6957 | if (enable_unrestricted_guest) |
6958 | return 0; | |
6959 | ||
1d8007bd PB |
6960 | ret = x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, addr, |
6961 | PAGE_SIZE * 3); | |
cbc94022 IE |
6962 | if (ret) |
6963 | return ret; | |
40bbb9d0 | 6964 | to_kvm_vmx(kvm)->tss_addr = addr; |
1f755a82 | 6965 | return init_rmode_tss(kvm); |
cbc94022 IE |
6966 | } |
6967 | ||
2ac52ab8 SC |
6968 | static int vmx_set_identity_map_addr(struct kvm *kvm, u64 ident_addr) |
6969 | { | |
40bbb9d0 | 6970 | to_kvm_vmx(kvm)->ept_identity_map_addr = ident_addr; |
2ac52ab8 SC |
6971 | return 0; |
6972 | } | |
6973 | ||
0ca1b4f4 | 6974 | static bool rmode_exception(struct kvm_vcpu *vcpu, int vec) |
6aa8b732 | 6975 | { |
77ab6db0 | 6976 | switch (vec) { |
77ab6db0 | 6977 | case BP_VECTOR: |
c573cd22 JK |
6978 | /* |
6979 | * Update instruction length as we may reinject the exception | |
6980 | * from user space while in guest debugging mode. | |
6981 | */ | |
6982 | to_vmx(vcpu)->vcpu.arch.event_exit_inst_len = | |
6983 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
d0bfb940 | 6984 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
0ca1b4f4 GN |
6985 | return false; |
6986 | /* fall through */ | |
6987 | case DB_VECTOR: | |
6988 | if (vcpu->guest_debug & | |
6989 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
6990 | return false; | |
d0bfb940 JK |
6991 | /* fall through */ |
6992 | case DE_VECTOR: | |
77ab6db0 JK |
6993 | case OF_VECTOR: |
6994 | case BR_VECTOR: | |
6995 | case UD_VECTOR: | |
6996 | case DF_VECTOR: | |
6997 | case SS_VECTOR: | |
6998 | case GP_VECTOR: | |
6999 | case MF_VECTOR: | |
0ca1b4f4 GN |
7000 | return true; |
7001 | break; | |
77ab6db0 | 7002 | } |
0ca1b4f4 GN |
7003 | return false; |
7004 | } | |
7005 | ||
7006 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, | |
7007 | int vec, u32 err_code) | |
7008 | { | |
7009 | /* | |
7010 | * Instruction with address size override prefix opcode 0x67 | |
7011 | * Cause the #SS fault with 0 error code in VM86 mode. | |
7012 | */ | |
7013 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) { | |
0ce97a2b | 7014 | if (kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE) { |
0ca1b4f4 GN |
7015 | if (vcpu->arch.halt_request) { |
7016 | vcpu->arch.halt_request = 0; | |
5cb56059 | 7017 | return kvm_vcpu_halt(vcpu); |
0ca1b4f4 GN |
7018 | } |
7019 | return 1; | |
7020 | } | |
7021 | return 0; | |
7022 | } | |
7023 | ||
7024 | /* | |
7025 | * Forward all other exceptions that are valid in real mode. | |
7026 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
7027 | * the required debugging infrastructure rework. | |
7028 | */ | |
7029 | kvm_queue_exception(vcpu, vec); | |
7030 | return 1; | |
6aa8b732 AK |
7031 | } |
7032 | ||
a0861c02 AK |
7033 | /* |
7034 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
7035 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
7036 | * We pass a fake environment to the machine check handler because we want | |
7037 | * the guest to be always treated like user space, no matter what context | |
7038 | * it used internally. | |
7039 | */ | |
7040 | static void kvm_machine_check(void) | |
7041 | { | |
7042 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
7043 | struct pt_regs regs = { | |
7044 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
7045 | .flags = X86_EFLAGS_IF, | |
7046 | }; | |
7047 | ||
7048 | do_machine_check(®s, 0); | |
7049 | #endif | |
7050 | } | |
7051 | ||
851ba692 | 7052 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
7053 | { |
7054 | /* already handled by vcpu_run */ | |
7055 | return 1; | |
7056 | } | |
7057 | ||
851ba692 | 7058 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 7059 | { |
1155f76a | 7060 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 7061 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 7062 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 7063 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
7064 | u32 vect_info; |
7065 | enum emulation_result er; | |
7066 | ||
1155f76a | 7067 | vect_info = vmx->idt_vectoring_info; |
88786475 | 7068 | intr_info = vmx->exit_intr_info; |
6aa8b732 | 7069 | |
a0861c02 | 7070 | if (is_machine_check(intr_info)) |
851ba692 | 7071 | return handle_machine_check(vcpu); |
a0861c02 | 7072 | |
ef85b673 | 7073 | if (is_nmi(intr_info)) |
1b6269db | 7074 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc | 7075 | |
082d06ed WL |
7076 | if (is_invalid_opcode(intr_info)) |
7077 | return handle_ud(vcpu); | |
7aa81cc0 | 7078 | |
6aa8b732 | 7079 | error_code = 0; |
2e11384c | 7080 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 | 7081 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
bf4ca23e | 7082 | |
9e869480 LA |
7083 | if (!vmx->rmode.vm86_active && is_gp_fault(intr_info)) { |
7084 | WARN_ON_ONCE(!enable_vmware_backdoor); | |
0ce97a2b | 7085 | er = kvm_emulate_instruction(vcpu, |
9e869480 LA |
7086 | EMULTYPE_VMWARE | EMULTYPE_NO_UD_ON_FAIL); |
7087 | if (er == EMULATE_USER_EXIT) | |
7088 | return 0; | |
7089 | else if (er != EMULATE_DONE) | |
7090 | kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); | |
7091 | return 1; | |
7092 | } | |
7093 | ||
bf4ca23e XG |
7094 | /* |
7095 | * The #PF with PFEC.RSVD = 1 indicates the guest is accessing | |
7096 | * MMIO, it is better to report an internal error. | |
7097 | * See the comments in vmx_handle_exit. | |
7098 | */ | |
7099 | if ((vect_info & VECTORING_INFO_VALID_MASK) && | |
7100 | !(is_page_fault(intr_info) && !(error_code & PFERR_RSVD_MASK))) { | |
7101 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
7102 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; | |
80f0e95d | 7103 | vcpu->run->internal.ndata = 3; |
bf4ca23e XG |
7104 | vcpu->run->internal.data[0] = vect_info; |
7105 | vcpu->run->internal.data[1] = intr_info; | |
80f0e95d | 7106 | vcpu->run->internal.data[2] = error_code; |
bf4ca23e XG |
7107 | return 0; |
7108 | } | |
7109 | ||
6aa8b732 AK |
7110 | if (is_page_fault(intr_info)) { |
7111 | cr2 = vmcs_readl(EXIT_QUALIFICATION); | |
1261bfa3 WL |
7112 | /* EPT won't cause page fault directly */ |
7113 | WARN_ON_ONCE(!vcpu->arch.apf.host_apf_reason && enable_ept); | |
d0006530 | 7114 | return kvm_handle_page_fault(vcpu, error_code, cr2, NULL, 0); |
6aa8b732 AK |
7115 | } |
7116 | ||
d0bfb940 | 7117 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
0ca1b4f4 GN |
7118 | |
7119 | if (vmx->rmode.vm86_active && rmode_exception(vcpu, ex_no)) | |
7120 | return handle_rmode_exception(vcpu, ex_no, error_code); | |
7121 | ||
42dbaa5a | 7122 | switch (ex_no) { |
54a20552 EN |
7123 | case AC_VECTOR: |
7124 | kvm_queue_exception_e(vcpu, AC_VECTOR, error_code); | |
7125 | return 1; | |
42dbaa5a JK |
7126 | case DB_VECTOR: |
7127 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
7128 | if (!(vcpu->guest_debug & | |
7129 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
8246bf52 | 7130 | vcpu->arch.dr6 &= ~15; |
6f43ed01 | 7131 | vcpu->arch.dr6 |= dr6 | DR6_RTM; |
32d43cd3 | 7132 | if (is_icebp(intr_info)) |
fd2a445a HD |
7133 | skip_emulated_instruction(vcpu); |
7134 | ||
42dbaa5a JK |
7135 | kvm_queue_exception(vcpu, DB_VECTOR); |
7136 | return 1; | |
7137 | } | |
7138 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
7139 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
7140 | /* fall through */ | |
7141 | case BP_VECTOR: | |
c573cd22 JK |
7142 | /* |
7143 | * Update instruction length as we may reinject #BP from | |
7144 | * user space while in guest debugging mode. Reading it for | |
7145 | * #DB as well causes no harm, it is not used in that case. | |
7146 | */ | |
7147 | vmx->vcpu.arch.event_exit_inst_len = | |
7148 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6aa8b732 | 7149 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
0a434bb2 | 7150 | rip = kvm_rip_read(vcpu); |
d0bfb940 JK |
7151 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
7152 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
7153 | break; |
7154 | default: | |
d0bfb940 JK |
7155 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
7156 | kvm_run->ex.exception = ex_no; | |
7157 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 7158 | break; |
6aa8b732 | 7159 | } |
6aa8b732 AK |
7160 | return 0; |
7161 | } | |
7162 | ||
851ba692 | 7163 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 7164 | { |
1165f5fe | 7165 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
7166 | return 1; |
7167 | } | |
7168 | ||
851ba692 | 7169 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 7170 | { |
851ba692 | 7171 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
bbeac283 | 7172 | vcpu->mmio_needed = 0; |
988ad74f AK |
7173 | return 0; |
7174 | } | |
6aa8b732 | 7175 | |
851ba692 | 7176 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 7177 | { |
bfdaab09 | 7178 | unsigned long exit_qualification; |
dca7f128 | 7179 | int size, in, string; |
039576c0 | 7180 | unsigned port; |
6aa8b732 | 7181 | |
bfdaab09 | 7182 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 7183 | string = (exit_qualification & 16) != 0; |
e70669ab | 7184 | |
cf8f70bf | 7185 | ++vcpu->stat.io_exits; |
e70669ab | 7186 | |
432baf60 | 7187 | if (string) |
0ce97a2b | 7188 | return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE; |
e70669ab | 7189 | |
cf8f70bf GN |
7190 | port = exit_qualification >> 16; |
7191 | size = (exit_qualification & 7) + 1; | |
432baf60 | 7192 | in = (exit_qualification & 8) != 0; |
cf8f70bf | 7193 | |
dca7f128 | 7194 | return kvm_fast_pio(vcpu, size, port, in); |
6aa8b732 AK |
7195 | } |
7196 | ||
102d8325 IM |
7197 | static void |
7198 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
7199 | { | |
7200 | /* | |
7201 | * Patch in the VMCALL instruction: | |
7202 | */ | |
7203 | hypercall[0] = 0x0f; | |
7204 | hypercall[1] = 0x01; | |
7205 | hypercall[2] = 0xc1; | |
102d8325 IM |
7206 | } |
7207 | ||
0fa06071 | 7208 | /* called to set cr0 as appropriate for a mov-to-cr0 exit. */ |
eeadf9e7 NHE |
7209 | static int handle_set_cr0(struct kvm_vcpu *vcpu, unsigned long val) |
7210 | { | |
eeadf9e7 | 7211 | if (is_guest_mode(vcpu)) { |
1a0d74e6 JK |
7212 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
7213 | unsigned long orig_val = val; | |
7214 | ||
eeadf9e7 NHE |
7215 | /* |
7216 | * We get here when L2 changed cr0 in a way that did not change | |
7217 | * any of L1's shadowed bits (see nested_vmx_exit_handled_cr), | |
1a0d74e6 JK |
7218 | * but did change L0 shadowed bits. So we first calculate the |
7219 | * effective cr0 value that L1 would like to write into the | |
7220 | * hardware. It consists of the L2-owned bits from the new | |
7221 | * value combined with the L1-owned bits from L1's guest_cr0. | |
eeadf9e7 | 7222 | */ |
1a0d74e6 JK |
7223 | val = (val & ~vmcs12->cr0_guest_host_mask) | |
7224 | (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask); | |
7225 | ||
3899152c | 7226 | if (!nested_guest_cr0_valid(vcpu, val)) |
eeadf9e7 | 7227 | return 1; |
1a0d74e6 JK |
7228 | |
7229 | if (kvm_set_cr0(vcpu, val)) | |
7230 | return 1; | |
7231 | vmcs_writel(CR0_READ_SHADOW, orig_val); | |
eeadf9e7 | 7232 | return 0; |
1a0d74e6 JK |
7233 | } else { |
7234 | if (to_vmx(vcpu)->nested.vmxon && | |
3899152c | 7235 | !nested_host_cr0_valid(vcpu, val)) |
1a0d74e6 | 7236 | return 1; |
3899152c | 7237 | |
eeadf9e7 | 7238 | return kvm_set_cr0(vcpu, val); |
1a0d74e6 | 7239 | } |
eeadf9e7 NHE |
7240 | } |
7241 | ||
7242 | static int handle_set_cr4(struct kvm_vcpu *vcpu, unsigned long val) | |
7243 | { | |
7244 | if (is_guest_mode(vcpu)) { | |
1a0d74e6 JK |
7245 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
7246 | unsigned long orig_val = val; | |
7247 | ||
7248 | /* analogously to handle_set_cr0 */ | |
7249 | val = (val & ~vmcs12->cr4_guest_host_mask) | | |
7250 | (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask); | |
7251 | if (kvm_set_cr4(vcpu, val)) | |
eeadf9e7 | 7252 | return 1; |
1a0d74e6 | 7253 | vmcs_writel(CR4_READ_SHADOW, orig_val); |
eeadf9e7 NHE |
7254 | return 0; |
7255 | } else | |
7256 | return kvm_set_cr4(vcpu, val); | |
7257 | } | |
7258 | ||
0367f205 PB |
7259 | static int handle_desc(struct kvm_vcpu *vcpu) |
7260 | { | |
7261 | WARN_ON(!(vcpu->arch.cr4 & X86_CR4_UMIP)); | |
0ce97a2b | 7262 | return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE; |
0367f205 PB |
7263 | } |
7264 | ||
851ba692 | 7265 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 7266 | { |
229456fc | 7267 | unsigned long exit_qualification, val; |
6aa8b732 AK |
7268 | int cr; |
7269 | int reg; | |
49a9b07e | 7270 | int err; |
6affcbed | 7271 | int ret; |
6aa8b732 | 7272 | |
bfdaab09 | 7273 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
7274 | cr = exit_qualification & 15; |
7275 | reg = (exit_qualification >> 8) & 15; | |
7276 | switch ((exit_qualification >> 4) & 3) { | |
7277 | case 0: /* mov to cr */ | |
1e32c079 | 7278 | val = kvm_register_readl(vcpu, reg); |
229456fc | 7279 | trace_kvm_cr_write(cr, val); |
6aa8b732 AK |
7280 | switch (cr) { |
7281 | case 0: | |
eeadf9e7 | 7282 | err = handle_set_cr0(vcpu, val); |
6affcbed | 7283 | return kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 7284 | case 3: |
e1de91cc | 7285 | WARN_ON_ONCE(enable_unrestricted_guest); |
2390218b | 7286 | err = kvm_set_cr3(vcpu, val); |
6affcbed | 7287 | return kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 7288 | case 4: |
eeadf9e7 | 7289 | err = handle_set_cr4(vcpu, val); |
6affcbed | 7290 | return kvm_complete_insn_gp(vcpu, err); |
0a5fff19 GN |
7291 | case 8: { |
7292 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
1e32c079 | 7293 | u8 cr8 = (u8)val; |
eea1cff9 | 7294 | err = kvm_set_cr8(vcpu, cr8); |
6affcbed | 7295 | ret = kvm_complete_insn_gp(vcpu, err); |
35754c98 | 7296 | if (lapic_in_kernel(vcpu)) |
6affcbed | 7297 | return ret; |
0a5fff19 | 7298 | if (cr8_prev <= cr8) |
6affcbed KH |
7299 | return ret; |
7300 | /* | |
7301 | * TODO: we might be squashing a | |
7302 | * KVM_GUESTDBG_SINGLESTEP-triggered | |
7303 | * KVM_EXIT_DEBUG here. | |
7304 | */ | |
851ba692 | 7305 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
7306 | return 0; |
7307 | } | |
4b8073e4 | 7308 | } |
6aa8b732 | 7309 | break; |
25c4c276 | 7310 | case 2: /* clts */ |
bd7e5b08 PB |
7311 | WARN_ONCE(1, "Guest should always own CR0.TS"); |
7312 | vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); | |
4d4ec087 | 7313 | trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); |
6affcbed | 7314 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 AK |
7315 | case 1: /*mov from cr*/ |
7316 | switch (cr) { | |
7317 | case 3: | |
e1de91cc | 7318 | WARN_ON_ONCE(enable_unrestricted_guest); |
9f8fe504 AK |
7319 | val = kvm_read_cr3(vcpu); |
7320 | kvm_register_write(vcpu, reg, val); | |
7321 | trace_kvm_cr_read(cr, val); | |
6affcbed | 7322 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 | 7323 | case 8: |
229456fc MT |
7324 | val = kvm_get_cr8(vcpu); |
7325 | kvm_register_write(vcpu, reg, val); | |
7326 | trace_kvm_cr_read(cr, val); | |
6affcbed | 7327 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 AK |
7328 | } |
7329 | break; | |
7330 | case 3: /* lmsw */ | |
a1f83a74 | 7331 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
4d4ec087 | 7332 | trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val); |
a1f83a74 | 7333 | kvm_lmsw(vcpu, val); |
6aa8b732 | 7334 | |
6affcbed | 7335 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 AK |
7336 | default: |
7337 | break; | |
7338 | } | |
851ba692 | 7339 | vcpu->run->exit_reason = 0; |
a737f256 | 7340 | vcpu_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
7341 | (int)(exit_qualification >> 4) & 3, cr); |
7342 | return 0; | |
7343 | } | |
7344 | ||
851ba692 | 7345 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 7346 | { |
bfdaab09 | 7347 | unsigned long exit_qualification; |
16f8a6f9 NA |
7348 | int dr, dr7, reg; |
7349 | ||
7350 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7351 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; | |
7352 | ||
7353 | /* First, if DR does not exist, trigger UD */ | |
7354 | if (!kvm_require_dr(vcpu, dr)) | |
7355 | return 1; | |
6aa8b732 | 7356 | |
f2483415 | 7357 | /* Do not handle if the CPL > 0, will trigger GP on re-entry */ |
0a79b009 AK |
7358 | if (!kvm_require_cpl(vcpu, 0)) |
7359 | return 1; | |
16f8a6f9 NA |
7360 | dr7 = vmcs_readl(GUEST_DR7); |
7361 | if (dr7 & DR7_GD) { | |
42dbaa5a JK |
7362 | /* |
7363 | * As the vm-exit takes precedence over the debug trap, we | |
7364 | * need to emulate the latter, either for the host or the | |
7365 | * guest debugging itself. | |
7366 | */ | |
7367 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 | 7368 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
16f8a6f9 | 7369 | vcpu->run->debug.arch.dr7 = dr7; |
82b32774 | 7370 | vcpu->run->debug.arch.pc = kvm_get_linear_rip(vcpu); |
851ba692 AK |
7371 | vcpu->run->debug.arch.exception = DB_VECTOR; |
7372 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
7373 | return 0; |
7374 | } else { | |
7305eb5d | 7375 | vcpu->arch.dr6 &= ~15; |
6f43ed01 | 7376 | vcpu->arch.dr6 |= DR6_BD | DR6_RTM; |
42dbaa5a JK |
7377 | kvm_queue_exception(vcpu, DB_VECTOR); |
7378 | return 1; | |
7379 | } | |
7380 | } | |
7381 | ||
81908bf4 | 7382 | if (vcpu->guest_debug == 0) { |
8f22372f PB |
7383 | vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL, |
7384 | CPU_BASED_MOV_DR_EXITING); | |
81908bf4 PB |
7385 | |
7386 | /* | |
7387 | * No more DR vmexits; force a reload of the debug registers | |
7388 | * and reenter on this instruction. The next vmexit will | |
7389 | * retrieve the full state of the debug registers. | |
7390 | */ | |
7391 | vcpu->arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT; | |
7392 | return 1; | |
7393 | } | |
7394 | ||
42dbaa5a JK |
7395 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); |
7396 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
020df079 | 7397 | unsigned long val; |
4c4d563b JK |
7398 | |
7399 | if (kvm_get_dr(vcpu, dr, &val)) | |
7400 | return 1; | |
7401 | kvm_register_write(vcpu, reg, val); | |
020df079 | 7402 | } else |
5777392e | 7403 | if (kvm_set_dr(vcpu, dr, kvm_register_readl(vcpu, reg))) |
4c4d563b JK |
7404 | return 1; |
7405 | ||
6affcbed | 7406 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 AK |
7407 | } |
7408 | ||
73aaf249 JK |
7409 | static u64 vmx_get_dr6(struct kvm_vcpu *vcpu) |
7410 | { | |
7411 | return vcpu->arch.dr6; | |
7412 | } | |
7413 | ||
7414 | static void vmx_set_dr6(struct kvm_vcpu *vcpu, unsigned long val) | |
7415 | { | |
7416 | } | |
7417 | ||
81908bf4 PB |
7418 | static void vmx_sync_dirty_debug_regs(struct kvm_vcpu *vcpu) |
7419 | { | |
81908bf4 PB |
7420 | get_debugreg(vcpu->arch.db[0], 0); |
7421 | get_debugreg(vcpu->arch.db[1], 1); | |
7422 | get_debugreg(vcpu->arch.db[2], 2); | |
7423 | get_debugreg(vcpu->arch.db[3], 3); | |
7424 | get_debugreg(vcpu->arch.dr6, 6); | |
7425 | vcpu->arch.dr7 = vmcs_readl(GUEST_DR7); | |
7426 | ||
7427 | vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT; | |
8f22372f | 7428 | vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL, CPU_BASED_MOV_DR_EXITING); |
81908bf4 PB |
7429 | } |
7430 | ||
020df079 GN |
7431 | static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) |
7432 | { | |
7433 | vmcs_writel(GUEST_DR7, val); | |
7434 | } | |
7435 | ||
851ba692 | 7436 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 7437 | { |
6a908b62 | 7438 | return kvm_emulate_cpuid(vcpu); |
6aa8b732 AK |
7439 | } |
7440 | ||
851ba692 | 7441 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 7442 | { |
ad312c7c | 7443 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
609e36d3 | 7444 | struct msr_data msr_info; |
6aa8b732 | 7445 | |
609e36d3 PB |
7446 | msr_info.index = ecx; |
7447 | msr_info.host_initiated = false; | |
7448 | if (vmx_get_msr(vcpu, &msr_info)) { | |
59200273 | 7449 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 7450 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
7451 | return 1; |
7452 | } | |
7453 | ||
609e36d3 | 7454 | trace_kvm_msr_read(ecx, msr_info.data); |
2714d1d3 | 7455 | |
6aa8b732 | 7456 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
609e36d3 PB |
7457 | vcpu->arch.regs[VCPU_REGS_RAX] = msr_info.data & -1u; |
7458 | vcpu->arch.regs[VCPU_REGS_RDX] = (msr_info.data >> 32) & -1u; | |
6affcbed | 7459 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 AK |
7460 | } |
7461 | ||
851ba692 | 7462 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 7463 | { |
8fe8ab46 | 7464 | struct msr_data msr; |
ad312c7c ZX |
7465 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
7466 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
7467 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 | 7468 | |
8fe8ab46 WA |
7469 | msr.data = data; |
7470 | msr.index = ecx; | |
7471 | msr.host_initiated = false; | |
854e8bb1 | 7472 | if (kvm_set_msr(vcpu, &msr) != 0) { |
59200273 | 7473 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 7474 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
7475 | return 1; |
7476 | } | |
7477 | ||
59200273 | 7478 | trace_kvm_msr_write(ecx, data); |
6affcbed | 7479 | return kvm_skip_emulated_instruction(vcpu); |
6aa8b732 AK |
7480 | } |
7481 | ||
851ba692 | 7482 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c | 7483 | { |
eb90f341 | 7484 | kvm_apic_update_ppr(vcpu); |
6e5d865c YS |
7485 | return 1; |
7486 | } | |
7487 | ||
851ba692 | 7488 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 7489 | { |
47c0152e PB |
7490 | vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL, |
7491 | CPU_BASED_VIRTUAL_INTR_PENDING); | |
2714d1d3 | 7492 | |
3842d135 AK |
7493 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
7494 | ||
a26bf12a | 7495 | ++vcpu->stat.irq_window_exits; |
6aa8b732 AK |
7496 | return 1; |
7497 | } | |
7498 | ||
851ba692 | 7499 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 | 7500 | { |
d3bef15f | 7501 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
7502 | } |
7503 | ||
851ba692 | 7504 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 7505 | { |
0d9c055e | 7506 | return kvm_emulate_hypercall(vcpu); |
c21415e8 IM |
7507 | } |
7508 | ||
ec25d5e6 GN |
7509 | static int handle_invd(struct kvm_vcpu *vcpu) |
7510 | { | |
0ce97a2b | 7511 | return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE; |
ec25d5e6 GN |
7512 | } |
7513 | ||
851ba692 | 7514 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 7515 | { |
f9c617f6 | 7516 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
7517 | |
7518 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
6affcbed | 7519 | return kvm_skip_emulated_instruction(vcpu); |
a7052897 MT |
7520 | } |
7521 | ||
fee84b07 AK |
7522 | static int handle_rdpmc(struct kvm_vcpu *vcpu) |
7523 | { | |
7524 | int err; | |
7525 | ||
7526 | err = kvm_rdpmc(vcpu); | |
6affcbed | 7527 | return kvm_complete_insn_gp(vcpu, err); |
fee84b07 AK |
7528 | } |
7529 | ||
851ba692 | 7530 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 | 7531 | { |
6affcbed | 7532 | return kvm_emulate_wbinvd(vcpu); |
e5edaa01 ED |
7533 | } |
7534 | ||
2acf923e DC |
7535 | static int handle_xsetbv(struct kvm_vcpu *vcpu) |
7536 | { | |
7537 | u64 new_bv = kvm_read_edx_eax(vcpu); | |
7538 | u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
7539 | ||
7540 | if (kvm_set_xcr(vcpu, index, new_bv) == 0) | |
6affcbed | 7541 | return kvm_skip_emulated_instruction(vcpu); |
2acf923e DC |
7542 | return 1; |
7543 | } | |
7544 | ||
f53cd63c WL |
7545 | static int handle_xsaves(struct kvm_vcpu *vcpu) |
7546 | { | |
6affcbed | 7547 | kvm_skip_emulated_instruction(vcpu); |
f53cd63c WL |
7548 | WARN(1, "this should never happen\n"); |
7549 | return 1; | |
7550 | } | |
7551 | ||
7552 | static int handle_xrstors(struct kvm_vcpu *vcpu) | |
7553 | { | |
6affcbed | 7554 | kvm_skip_emulated_instruction(vcpu); |
f53cd63c WL |
7555 | WARN(1, "this should never happen\n"); |
7556 | return 1; | |
7557 | } | |
7558 | ||
851ba692 | 7559 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 7560 | { |
58fbbf26 KT |
7561 | if (likely(fasteoi)) { |
7562 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7563 | int access_type, offset; | |
7564 | ||
7565 | access_type = exit_qualification & APIC_ACCESS_TYPE; | |
7566 | offset = exit_qualification & APIC_ACCESS_OFFSET; | |
7567 | /* | |
7568 | * Sane guest uses MOV to write EOI, with written value | |
7569 | * not cared. So make a short-circuit here by avoiding | |
7570 | * heavy instruction emulation. | |
7571 | */ | |
7572 | if ((access_type == TYPE_LINEAR_APIC_INST_WRITE) && | |
7573 | (offset == APIC_EOI)) { | |
7574 | kvm_lapic_set_eoi(vcpu); | |
6affcbed | 7575 | return kvm_skip_emulated_instruction(vcpu); |
58fbbf26 KT |
7576 | } |
7577 | } | |
0ce97a2b | 7578 | return kvm_emulate_instruction(vcpu, 0) == EMULATE_DONE; |
f78e0e2e SY |
7579 | } |
7580 | ||
c7c9c56c YZ |
7581 | static int handle_apic_eoi_induced(struct kvm_vcpu *vcpu) |
7582 | { | |
7583 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7584 | int vector = exit_qualification & 0xff; | |
7585 | ||
7586 | /* EOI-induced VM exit is trap-like and thus no need to adjust IP */ | |
7587 | kvm_apic_set_eoi_accelerated(vcpu, vector); | |
7588 | return 1; | |
7589 | } | |
7590 | ||
83d4c286 YZ |
7591 | static int handle_apic_write(struct kvm_vcpu *vcpu) |
7592 | { | |
7593 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7594 | u32 offset = exit_qualification & 0xfff; | |
7595 | ||
7596 | /* APIC-write VM exit is trap-like and thus no need to adjust IP */ | |
7597 | kvm_apic_write_nodecode(vcpu, offset); | |
7598 | return 1; | |
7599 | } | |
7600 | ||
851ba692 | 7601 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 7602 | { |
60637aac | 7603 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 | 7604 | unsigned long exit_qualification; |
e269fb21 JK |
7605 | bool has_error_code = false; |
7606 | u32 error_code = 0; | |
37817f29 | 7607 | u16 tss_selector; |
7f3d35fd | 7608 | int reason, type, idt_v, idt_index; |
64a7ec06 GN |
7609 | |
7610 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
7f3d35fd | 7611 | idt_index = (vmx->idt_vectoring_info & VECTORING_INFO_VECTOR_MASK); |
64a7ec06 | 7612 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); |
37817f29 IE |
7613 | |
7614 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
7615 | ||
7616 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
7617 | if (reason == TASK_SWITCH_GATE && idt_v) { |
7618 | switch (type) { | |
7619 | case INTR_TYPE_NMI_INTR: | |
7620 | vcpu->arch.nmi_injected = false; | |
654f06fc | 7621 | vmx_set_nmi_mask(vcpu, true); |
64a7ec06 GN |
7622 | break; |
7623 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 7624 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
7625 | kvm_clear_interrupt_queue(vcpu); |
7626 | break; | |
7627 | case INTR_TYPE_HARD_EXCEPTION: | |
e269fb21 JK |
7628 | if (vmx->idt_vectoring_info & |
7629 | VECTORING_INFO_DELIVER_CODE_MASK) { | |
7630 | has_error_code = true; | |
7631 | error_code = | |
7632 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
7633 | } | |
7634 | /* fall through */ | |
64a7ec06 GN |
7635 | case INTR_TYPE_SOFT_EXCEPTION: |
7636 | kvm_clear_exception_queue(vcpu); | |
7637 | break; | |
7638 | default: | |
7639 | break; | |
7640 | } | |
60637aac | 7641 | } |
37817f29 IE |
7642 | tss_selector = exit_qualification; |
7643 | ||
64a7ec06 GN |
7644 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
7645 | type != INTR_TYPE_EXT_INTR && | |
7646 | type != INTR_TYPE_NMI_INTR)) | |
7647 | skip_emulated_instruction(vcpu); | |
7648 | ||
7f3d35fd KW |
7649 | if (kvm_task_switch(vcpu, tss_selector, |
7650 | type == INTR_TYPE_SOFT_INTR ? idt_index : -1, reason, | |
7651 | has_error_code, error_code) == EMULATE_FAIL) { | |
acb54517 GN |
7652 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
7653 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
7654 | vcpu->run->internal.ndata = 0; | |
42dbaa5a | 7655 | return 0; |
acb54517 | 7656 | } |
42dbaa5a | 7657 | |
42dbaa5a JK |
7658 | /* |
7659 | * TODO: What about debug traps on tss switch? | |
7660 | * Are we supposed to inject them and update dr6? | |
7661 | */ | |
7662 | ||
7663 | return 1; | |
37817f29 IE |
7664 | } |
7665 | ||
851ba692 | 7666 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 7667 | { |
f9c617f6 | 7668 | unsigned long exit_qualification; |
1439442c | 7669 | gpa_t gpa; |
eebed243 | 7670 | u64 error_code; |
1439442c | 7671 | |
f9c617f6 | 7672 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c | 7673 | |
0be9c7a8 GN |
7674 | /* |
7675 | * EPT violation happened while executing iret from NMI, | |
7676 | * "blocked by NMI" bit has to be set before next VM entry. | |
7677 | * There are errata that may cause this bit to not be set: | |
7678 | * AAK134, BY25. | |
7679 | */ | |
bcd1c294 | 7680 | if (!(to_vmx(vcpu)->idt_vectoring_info & VECTORING_INFO_VALID_MASK) && |
d02fcf50 | 7681 | enable_vnmi && |
bcd1c294 | 7682 | (exit_qualification & INTR_INFO_UNBLOCK_NMI)) |
0be9c7a8 GN |
7683 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, GUEST_INTR_STATE_NMI); |
7684 | ||
1439442c | 7685 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); |
229456fc | 7686 | trace_kvm_page_fault(gpa, exit_qualification); |
4f5982a5 | 7687 | |
27959a44 | 7688 | /* Is it a read fault? */ |
ab22a473 | 7689 | error_code = (exit_qualification & EPT_VIOLATION_ACC_READ) |
27959a44 JS |
7690 | ? PFERR_USER_MASK : 0; |
7691 | /* Is it a write fault? */ | |
ab22a473 | 7692 | error_code |= (exit_qualification & EPT_VIOLATION_ACC_WRITE) |
27959a44 JS |
7693 | ? PFERR_WRITE_MASK : 0; |
7694 | /* Is it a fetch fault? */ | |
ab22a473 | 7695 | error_code |= (exit_qualification & EPT_VIOLATION_ACC_INSTR) |
27959a44 JS |
7696 | ? PFERR_FETCH_MASK : 0; |
7697 | /* ept page table entry is present? */ | |
7698 | error_code |= (exit_qualification & | |
7699 | (EPT_VIOLATION_READABLE | EPT_VIOLATION_WRITABLE | | |
7700 | EPT_VIOLATION_EXECUTABLE)) | |
7701 | ? PFERR_PRESENT_MASK : 0; | |
4f5982a5 | 7702 | |
eebed243 PB |
7703 | error_code |= (exit_qualification & 0x100) != 0 ? |
7704 | PFERR_GUEST_FINAL_MASK : PFERR_GUEST_PAGE_MASK; | |
25d92081 | 7705 | |
25d92081 | 7706 | vcpu->arch.exit_qualification = exit_qualification; |
4f5982a5 | 7707 | return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0); |
1439442c SY |
7708 | } |
7709 | ||
851ba692 | 7710 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 | 7711 | { |
68f89400 MT |
7712 | gpa_t gpa; |
7713 | ||
9034e6e8 PB |
7714 | /* |
7715 | * A nested guest cannot optimize MMIO vmexits, because we have an | |
7716 | * nGPA here instead of the required GPA. | |
7717 | */ | |
68f89400 | 7718 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); |
9034e6e8 PB |
7719 | if (!is_guest_mode(vcpu) && |
7720 | !kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) { | |
931c33b1 | 7721 | trace_kvm_fast_mmio(gpa); |
d391f120 VK |
7722 | /* |
7723 | * Doing kvm_skip_emulated_instruction() depends on undefined | |
7724 | * behavior: Intel's manual doesn't mandate | |
7725 | * VM_EXIT_INSTRUCTION_LEN to be set in VMCS when EPT MISCONFIG | |
7726 | * occurs and while on real hardware it was observed to be set, | |
7727 | * other hypervisors (namely Hyper-V) don't set it, we end up | |
7728 | * advancing IP with some random value. Disable fast mmio when | |
7729 | * running nested and keep it for real hardware in hope that | |
7730 | * VM_EXIT_INSTRUCTION_LEN will always be set correctly. | |
7731 | */ | |
7732 | if (!static_cpu_has(X86_FEATURE_HYPERVISOR)) | |
7733 | return kvm_skip_emulated_instruction(vcpu); | |
7734 | else | |
0ce97a2b | 7735 | return kvm_emulate_instruction(vcpu, EMULTYPE_SKIP) == |
c4409905 | 7736 | EMULATE_DONE; |
68c3b4d1 | 7737 | } |
68f89400 | 7738 | |
c75d0edc | 7739 | return kvm_mmu_page_fault(vcpu, gpa, PFERR_RSVD_MASK, NULL, 0); |
68f89400 MT |
7740 | } |
7741 | ||
851ba692 | 7742 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 | 7743 | { |
d02fcf50 | 7744 | WARN_ON_ONCE(!enable_vnmi); |
47c0152e PB |
7745 | vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL, |
7746 | CPU_BASED_VIRTUAL_NMI_PENDING); | |
f08864b4 | 7747 | ++vcpu->stat.nmi_window_exits; |
3842d135 | 7748 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f08864b4 SY |
7749 | |
7750 | return 1; | |
7751 | } | |
7752 | ||
80ced186 | 7753 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 7754 | { |
8b3079a5 AK |
7755 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
7756 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 7757 | int ret = 1; |
49e9d557 AK |
7758 | u32 cpu_exec_ctrl; |
7759 | bool intr_window_requested; | |
b8405c18 | 7760 | unsigned count = 130; |
49e9d557 | 7761 | |
2bb8cafe SC |
7762 | /* |
7763 | * We should never reach the point where we are emulating L2 | |
7764 | * due to invalid guest state as that means we incorrectly | |
7765 | * allowed a nested VMEntry with an invalid vmcs12. | |
7766 | */ | |
7767 | WARN_ON_ONCE(vmx->emulation_required && vmx->nested.nested_run_pending); | |
7768 | ||
49e9d557 AK |
7769 | cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
7770 | intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; | |
ea953ef0 | 7771 | |
98eb2f8b | 7772 | while (vmx->emulation_required && count-- != 0) { |
bdea48e3 | 7773 | if (intr_window_requested && vmx_interrupt_allowed(vcpu)) |
49e9d557 AK |
7774 | return handle_interrupt_window(&vmx->vcpu); |
7775 | ||
72875d8a | 7776 | if (kvm_test_request(KVM_REQ_EVENT, vcpu)) |
de87dcdd AK |
7777 | return 1; |
7778 | ||
0ce97a2b | 7779 | err = kvm_emulate_instruction(vcpu, 0); |
ea953ef0 | 7780 | |
ac0a48c3 | 7781 | if (err == EMULATE_USER_EXIT) { |
94452b9e | 7782 | ++vcpu->stat.mmio_exits; |
80ced186 MG |
7783 | ret = 0; |
7784 | goto out; | |
7785 | } | |
1d5a4d9b | 7786 | |
add5ff7a SC |
7787 | if (err != EMULATE_DONE) |
7788 | goto emulation_error; | |
7789 | ||
7790 | if (vmx->emulation_required && !vmx->rmode.vm86_active && | |
7791 | vcpu->arch.exception.pending) | |
7792 | goto emulation_error; | |
ea953ef0 | 7793 | |
8d76c49e GN |
7794 | if (vcpu->arch.halt_request) { |
7795 | vcpu->arch.halt_request = 0; | |
5cb56059 | 7796 | ret = kvm_vcpu_halt(vcpu); |
8d76c49e GN |
7797 | goto out; |
7798 | } | |
7799 | ||
ea953ef0 | 7800 | if (signal_pending(current)) |
80ced186 | 7801 | goto out; |
ea953ef0 MG |
7802 | if (need_resched()) |
7803 | schedule(); | |
7804 | } | |
7805 | ||
80ced186 MG |
7806 | out: |
7807 | return ret; | |
b4a2d31d | 7808 | |
add5ff7a SC |
7809 | emulation_error: |
7810 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
7811 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
7812 | vcpu->run->internal.ndata = 0; | |
7813 | return 0; | |
b4a2d31d RK |
7814 | } |
7815 | ||
7816 | static void grow_ple_window(struct kvm_vcpu *vcpu) | |
7817 | { | |
7818 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
7819 | int old = vmx->ple_window; | |
7820 | ||
c8e88717 BM |
7821 | vmx->ple_window = __grow_ple_window(old, ple_window, |
7822 | ple_window_grow, | |
7823 | ple_window_max); | |
b4a2d31d RK |
7824 | |
7825 | if (vmx->ple_window != old) | |
7826 | vmx->ple_window_dirty = true; | |
7b46268d RK |
7827 | |
7828 | trace_kvm_ple_window_grow(vcpu->vcpu_id, vmx->ple_window, old); | |
b4a2d31d RK |
7829 | } |
7830 | ||
7831 | static void shrink_ple_window(struct kvm_vcpu *vcpu) | |
7832 | { | |
7833 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
7834 | int old = vmx->ple_window; | |
7835 | ||
c8e88717 BM |
7836 | vmx->ple_window = __shrink_ple_window(old, ple_window, |
7837 | ple_window_shrink, | |
7838 | ple_window); | |
b4a2d31d RK |
7839 | |
7840 | if (vmx->ple_window != old) | |
7841 | vmx->ple_window_dirty = true; | |
7b46268d RK |
7842 | |
7843 | trace_kvm_ple_window_shrink(vcpu->vcpu_id, vmx->ple_window, old); | |
b4a2d31d RK |
7844 | } |
7845 | ||
bf9f6ac8 FW |
7846 | /* |
7847 | * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR. | |
7848 | */ | |
7849 | static void wakeup_handler(void) | |
7850 | { | |
7851 | struct kvm_vcpu *vcpu; | |
7852 | int cpu = smp_processor_id(); | |
7853 | ||
7854 | spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); | |
7855 | list_for_each_entry(vcpu, &per_cpu(blocked_vcpu_on_cpu, cpu), | |
7856 | blocked_vcpu_list) { | |
7857 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
7858 | ||
7859 | if (pi_test_on(pi_desc) == 1) | |
7860 | kvm_vcpu_kick(vcpu); | |
7861 | } | |
7862 | spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, cpu)); | |
7863 | } | |
7864 | ||
e01bca2f | 7865 | static void vmx_enable_tdp(void) |
f160c7b7 JS |
7866 | { |
7867 | kvm_mmu_set_mask_ptes(VMX_EPT_READABLE_MASK, | |
7868 | enable_ept_ad_bits ? VMX_EPT_ACCESS_BIT : 0ull, | |
7869 | enable_ept_ad_bits ? VMX_EPT_DIRTY_BIT : 0ull, | |
7870 | 0ull, VMX_EPT_EXECUTABLE_MASK, | |
7871 | cpu_has_vmx_ept_execute_only() ? 0ull : VMX_EPT_READABLE_MASK, | |
d0ec49d4 | 7872 | VMX_EPT_RWX_MASK, 0ull); |
f160c7b7 JS |
7873 | |
7874 | ept_set_mmio_spte_mask(); | |
7875 | kvm_enable_tdp(); | |
7876 | } | |
7877 | ||
f2c7648d TC |
7878 | static __init int hardware_setup(void) |
7879 | { | |
cf81a7e5 | 7880 | unsigned long host_bndcfgs; |
904e14fb | 7881 | int r = -ENOMEM, i; |
34a1cd60 TC |
7882 | |
7883 | rdmsrl_safe(MSR_EFER, &host_efer); | |
7884 | ||
7885 | for (i = 0; i < ARRAY_SIZE(vmx_msr_index); ++i) | |
7886 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
7887 | ||
23611332 RK |
7888 | for (i = 0; i < VMX_BITMAP_NR; i++) { |
7889 | vmx_bitmap[i] = (unsigned long *)__get_free_page(GFP_KERNEL); | |
7890 | if (!vmx_bitmap[i]) | |
7891 | goto out; | |
7892 | } | |
34a1cd60 | 7893 | |
34a1cd60 TC |
7894 | memset(vmx_vmread_bitmap, 0xff, PAGE_SIZE); |
7895 | memset(vmx_vmwrite_bitmap, 0xff, PAGE_SIZE); | |
7896 | ||
34a1cd60 TC |
7897 | if (setup_vmcs_config(&vmcs_config) < 0) { |
7898 | r = -EIO; | |
23611332 | 7899 | goto out; |
baa03522 | 7900 | } |
f2c7648d TC |
7901 | |
7902 | if (boot_cpu_has(X86_FEATURE_NX)) | |
7903 | kvm_enable_efer_bits(EFER_NX); | |
7904 | ||
cf81a7e5 SC |
7905 | if (boot_cpu_has(X86_FEATURE_MPX)) { |
7906 | rdmsrl(MSR_IA32_BNDCFGS, host_bndcfgs); | |
7907 | WARN_ONCE(host_bndcfgs, "KVM: BNDCFGS in host will be lost"); | |
7908 | } | |
7909 | ||
08d839c4 WL |
7910 | if (!cpu_has_vmx_vpid() || !cpu_has_vmx_invvpid() || |
7911 | !(cpu_has_vmx_invvpid_single() || cpu_has_vmx_invvpid_global())) | |
f2c7648d | 7912 | enable_vpid = 0; |
08d839c4 | 7913 | |
f2c7648d | 7914 | if (!cpu_has_vmx_ept() || |
42aa53b4 | 7915 | !cpu_has_vmx_ept_4levels() || |
f5f51586 | 7916 | !cpu_has_vmx_ept_mt_wb() || |
8ad8182e | 7917 | !cpu_has_vmx_invept_global()) |
f2c7648d | 7918 | enable_ept = 0; |
f2c7648d | 7919 | |
fce6ac4c | 7920 | if (!cpu_has_vmx_ept_ad_bits() || !enable_ept) |
f2c7648d TC |
7921 | enable_ept_ad_bits = 0; |
7922 | ||
8ad8182e | 7923 | if (!cpu_has_vmx_unrestricted_guest() || !enable_ept) |
f2c7648d TC |
7924 | enable_unrestricted_guest = 0; |
7925 | ||
ad15a296 | 7926 | if (!cpu_has_vmx_flexpriority()) |
f2c7648d TC |
7927 | flexpriority_enabled = 0; |
7928 | ||
d02fcf50 PB |
7929 | if (!cpu_has_virtual_nmis()) |
7930 | enable_vnmi = 0; | |
7931 | ||
ad15a296 PB |
7932 | /* |
7933 | * set_apic_access_page_addr() is used to reload apic access | |
7934 | * page upon invalidation. No need to do anything if not | |
7935 | * using the APIC_ACCESS_ADDR VMCS field. | |
7936 | */ | |
7937 | if (!flexpriority_enabled) | |
f2c7648d | 7938 | kvm_x86_ops->set_apic_access_page_addr = NULL; |
f2c7648d TC |
7939 | |
7940 | if (!cpu_has_vmx_tpr_shadow()) | |
7941 | kvm_x86_ops->update_cr8_intercept = NULL; | |
7942 | ||
7943 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) | |
7944 | kvm_disable_largepages(); | |
7945 | ||
877ad952 TL |
7946 | #if IS_ENABLED(CONFIG_HYPERV) |
7947 | if (ms_hyperv.nested_features & HV_X64_NESTED_GUEST_MAPPING_FLUSH | |
7948 | && enable_ept) | |
7949 | kvm_x86_ops->tlb_remote_flush = vmx_hv_remote_flush_tlb; | |
7950 | #endif | |
7951 | ||
0f107682 | 7952 | if (!cpu_has_vmx_ple()) { |
f2c7648d | 7953 | ple_gap = 0; |
0f107682 WL |
7954 | ple_window = 0; |
7955 | ple_window_grow = 0; | |
7956 | ple_window_max = 0; | |
7957 | ple_window_shrink = 0; | |
7958 | } | |
f2c7648d | 7959 | |
76dfafd5 | 7960 | if (!cpu_has_vmx_apicv()) { |
f2c7648d | 7961 | enable_apicv = 0; |
76dfafd5 PB |
7962 | kvm_x86_ops->sync_pir_to_irr = NULL; |
7963 | } | |
f2c7648d | 7964 | |
64903d61 HZ |
7965 | if (cpu_has_vmx_tsc_scaling()) { |
7966 | kvm_has_tsc_control = true; | |
7967 | kvm_max_tsc_scaling_ratio = KVM_VMX_TSC_MULTIPLIER_MAX; | |
7968 | kvm_tsc_scaling_ratio_frac_bits = 48; | |
7969 | } | |
7970 | ||
04bb92e4 WL |
7971 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
7972 | ||
f160c7b7 JS |
7973 | if (enable_ept) |
7974 | vmx_enable_tdp(); | |
7975 | else | |
baa03522 TC |
7976 | kvm_disable_tdp(); |
7977 | ||
8fcc4b59 JM |
7978 | if (!nested) { |
7979 | kvm_x86_ops->get_nested_state = NULL; | |
7980 | kvm_x86_ops->set_nested_state = NULL; | |
7981 | } | |
7982 | ||
843e4330 KH |
7983 | /* |
7984 | * Only enable PML when hardware supports PML feature, and both EPT | |
7985 | * and EPT A/D bit features are enabled -- PML depends on them to work. | |
7986 | */ | |
7987 | if (!enable_ept || !enable_ept_ad_bits || !cpu_has_vmx_pml()) | |
7988 | enable_pml = 0; | |
7989 | ||
7990 | if (!enable_pml) { | |
7991 | kvm_x86_ops->slot_enable_log_dirty = NULL; | |
7992 | kvm_x86_ops->slot_disable_log_dirty = NULL; | |
7993 | kvm_x86_ops->flush_log_dirty = NULL; | |
7994 | kvm_x86_ops->enable_log_dirty_pt_masked = NULL; | |
7995 | } | |
7996 | ||
d264ee0c SC |
7997 | if (!cpu_has_vmx_preemption_timer()) |
7998 | kvm_x86_ops->request_immediate_exit = __kvm_request_immediate_exit; | |
7999 | ||
64672c95 YJ |
8000 | if (cpu_has_vmx_preemption_timer() && enable_preemption_timer) { |
8001 | u64 vmx_msr; | |
8002 | ||
8003 | rdmsrl(MSR_IA32_VMX_MISC, vmx_msr); | |
8004 | cpu_preemption_timer_multi = | |
8005 | vmx_msr & VMX_MISC_PREEMPTION_TIMER_RATE_MASK; | |
8006 | } else { | |
8007 | kvm_x86_ops->set_hv_timer = NULL; | |
8008 | kvm_x86_ops->cancel_hv_timer = NULL; | |
8009 | } | |
8010 | ||
c5d167b2 PB |
8011 | if (!cpu_has_vmx_shadow_vmcs()) |
8012 | enable_shadow_vmcs = 0; | |
8013 | if (enable_shadow_vmcs) | |
8014 | init_vmcs_shadow_fields(); | |
8015 | ||
bf9f6ac8 | 8016 | kvm_set_posted_intr_wakeup_handler(wakeup_handler); |
1389309c | 8017 | nested_vmx_setup_ctls_msrs(&vmcs_config.nested, enable_apicv); |
bf9f6ac8 | 8018 | |
c45dcc71 AR |
8019 | kvm_mce_cap_supported |= MCG_LMCE_P; |
8020 | ||
f2c7648d | 8021 | return alloc_kvm_area(); |
34a1cd60 | 8022 | |
34a1cd60 | 8023 | out: |
23611332 RK |
8024 | for (i = 0; i < VMX_BITMAP_NR; i++) |
8025 | free_page((unsigned long)vmx_bitmap[i]); | |
34a1cd60 TC |
8026 | |
8027 | return r; | |
f2c7648d TC |
8028 | } |
8029 | ||
8030 | static __exit void hardware_unsetup(void) | |
8031 | { | |
23611332 RK |
8032 | int i; |
8033 | ||
8034 | for (i = 0; i < VMX_BITMAP_NR; i++) | |
8035 | free_page((unsigned long)vmx_bitmap[i]); | |
34a1cd60 | 8036 | |
f2c7648d TC |
8037 | free_kvm_area(); |
8038 | } | |
8039 | ||
4b8d54f9 ZE |
8040 | /* |
8041 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
8042 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
8043 | */ | |
9fb41ba8 | 8044 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 | 8045 | { |
b31c114b | 8046 | if (!kvm_pause_in_guest(vcpu->kvm)) |
b4a2d31d RK |
8047 | grow_ple_window(vcpu); |
8048 | ||
de63ad4c LM |
8049 | /* |
8050 | * Intel sdm vol3 ch-25.1.3 says: The "PAUSE-loop exiting" | |
8051 | * VM-execution control is ignored if CPL > 0. OTOH, KVM | |
8052 | * never set PAUSE_EXITING and just set PLE if supported, | |
8053 | * so the vcpu must be CPL=0 if it gets a PAUSE exit. | |
8054 | */ | |
8055 | kvm_vcpu_on_spin(vcpu, true); | |
6affcbed | 8056 | return kvm_skip_emulated_instruction(vcpu); |
4b8d54f9 ZE |
8057 | } |
8058 | ||
87c00572 | 8059 | static int handle_nop(struct kvm_vcpu *vcpu) |
59708670 | 8060 | { |
6affcbed | 8061 | return kvm_skip_emulated_instruction(vcpu); |
59708670 SY |
8062 | } |
8063 | ||
87c00572 GS |
8064 | static int handle_mwait(struct kvm_vcpu *vcpu) |
8065 | { | |
8066 | printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n"); | |
8067 | return handle_nop(vcpu); | |
8068 | } | |
8069 | ||
45ec368c JM |
8070 | static int handle_invalid_op(struct kvm_vcpu *vcpu) |
8071 | { | |
8072 | kvm_queue_exception(vcpu, UD_VECTOR); | |
8073 | return 1; | |
8074 | } | |
8075 | ||
5f3d45e7 MD |
8076 | static int handle_monitor_trap(struct kvm_vcpu *vcpu) |
8077 | { | |
8078 | return 1; | |
8079 | } | |
8080 | ||
87c00572 GS |
8081 | static int handle_monitor(struct kvm_vcpu *vcpu) |
8082 | { | |
8083 | printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n"); | |
8084 | return handle_nop(vcpu); | |
8085 | } | |
8086 | ||
0658fbaa ACL |
8087 | /* |
8088 | * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(), | |
09abb5e3 SC |
8089 | * set the success or error code of an emulated VMX instruction (as specified |
8090 | * by Vol 2B, VMX Instruction Reference, "Conventions"), and skip the emulated | |
8091 | * instruction. | |
0658fbaa | 8092 | */ |
09abb5e3 | 8093 | static int nested_vmx_succeed(struct kvm_vcpu *vcpu) |
0658fbaa ACL |
8094 | { |
8095 | vmx_set_rflags(vcpu, vmx_get_rflags(vcpu) | |
8096 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
8097 | X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF)); | |
09abb5e3 | 8098 | return kvm_skip_emulated_instruction(vcpu); |
0658fbaa ACL |
8099 | } |
8100 | ||
09abb5e3 | 8101 | static int nested_vmx_failInvalid(struct kvm_vcpu *vcpu) |
0658fbaa ACL |
8102 | { |
8103 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
8104 | & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF | | |
8105 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
8106 | | X86_EFLAGS_CF); | |
09abb5e3 | 8107 | return kvm_skip_emulated_instruction(vcpu); |
0658fbaa ACL |
8108 | } |
8109 | ||
09abb5e3 SC |
8110 | static int nested_vmx_failValid(struct kvm_vcpu *vcpu, |
8111 | u32 vm_instruction_error) | |
0658fbaa | 8112 | { |
b8bbab92 VK |
8113 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8114 | ||
09abb5e3 SC |
8115 | /* |
8116 | * failValid writes the error number to the current VMCS, which | |
8117 | * can't be done if there isn't a current VMCS. | |
8118 | */ | |
b8bbab92 | 8119 | if (vmx->nested.current_vmptr == -1ull && !vmx->nested.hv_evmcs) |
09abb5e3 SC |
8120 | return nested_vmx_failInvalid(vcpu); |
8121 | ||
0658fbaa ACL |
8122 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) |
8123 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
8124 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
8125 | | X86_EFLAGS_ZF); | |
8126 | get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error; | |
8127 | /* | |
8128 | * We don't need to force a shadow sync because | |
8129 | * VM_INSTRUCTION_ERROR is not shadowed | |
8130 | */ | |
09abb5e3 | 8131 | return kvm_skip_emulated_instruction(vcpu); |
0658fbaa | 8132 | } |
145c28dd | 8133 | |
ff651cb6 WV |
8134 | static void nested_vmx_abort(struct kvm_vcpu *vcpu, u32 indicator) |
8135 | { | |
8136 | /* TODO: not to reset guest simply here. */ | |
8137 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
bbe41b95 | 8138 | pr_debug_ratelimited("kvm: nested vmx abort, indicator %d\n", indicator); |
ff651cb6 WV |
8139 | } |
8140 | ||
f4124500 JK |
8141 | static enum hrtimer_restart vmx_preemption_timer_fn(struct hrtimer *timer) |
8142 | { | |
8143 | struct vcpu_vmx *vmx = | |
8144 | container_of(timer, struct vcpu_vmx, nested.preemption_timer); | |
8145 | ||
8146 | vmx->nested.preemption_timer_expired = true; | |
8147 | kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu); | |
8148 | kvm_vcpu_kick(&vmx->vcpu); | |
8149 | ||
8150 | return HRTIMER_NORESTART; | |
8151 | } | |
8152 | ||
19677e32 BD |
8153 | /* |
8154 | * Decode the memory-address operand of a vmx instruction, as recorded on an | |
8155 | * exit caused by such an instruction (run by a guest hypervisor). | |
8156 | * On success, returns 0. When the operand is invalid, returns 1 and throws | |
8157 | * #UD or #GP. | |
8158 | */ | |
8159 | static int get_vmx_mem_address(struct kvm_vcpu *vcpu, | |
8160 | unsigned long exit_qualification, | |
f9eb4af6 | 8161 | u32 vmx_instruction_info, bool wr, gva_t *ret) |
19677e32 | 8162 | { |
f9eb4af6 EK |
8163 | gva_t off; |
8164 | bool exn; | |
8165 | struct kvm_segment s; | |
8166 | ||
19677e32 BD |
8167 | /* |
8168 | * According to Vol. 3B, "Information for VM Exits Due to Instruction | |
8169 | * Execution", on an exit, vmx_instruction_info holds most of the | |
8170 | * addressing components of the operand. Only the displacement part | |
8171 | * is put in exit_qualification (see 3B, "Basic VM-Exit Information"). | |
8172 | * For how an actual address is calculated from all these components, | |
8173 | * refer to Vol. 1, "Operand Addressing". | |
8174 | */ | |
8175 | int scaling = vmx_instruction_info & 3; | |
8176 | int addr_size = (vmx_instruction_info >> 7) & 7; | |
8177 | bool is_reg = vmx_instruction_info & (1u << 10); | |
8178 | int seg_reg = (vmx_instruction_info >> 15) & 7; | |
8179 | int index_reg = (vmx_instruction_info >> 18) & 0xf; | |
8180 | bool index_is_valid = !(vmx_instruction_info & (1u << 22)); | |
8181 | int base_reg = (vmx_instruction_info >> 23) & 0xf; | |
8182 | bool base_is_valid = !(vmx_instruction_info & (1u << 27)); | |
8183 | ||
8184 | if (is_reg) { | |
8185 | kvm_queue_exception(vcpu, UD_VECTOR); | |
8186 | return 1; | |
8187 | } | |
8188 | ||
8189 | /* Addr = segment_base + offset */ | |
8190 | /* offset = base + [index * scale] + displacement */ | |
f9eb4af6 | 8191 | off = exit_qualification; /* holds the displacement */ |
19677e32 | 8192 | if (base_is_valid) |
f9eb4af6 | 8193 | off += kvm_register_read(vcpu, base_reg); |
19677e32 | 8194 | if (index_is_valid) |
f9eb4af6 EK |
8195 | off += kvm_register_read(vcpu, index_reg)<<scaling; |
8196 | vmx_get_segment(vcpu, &s, seg_reg); | |
8197 | *ret = s.base + off; | |
19677e32 BD |
8198 | |
8199 | if (addr_size == 1) /* 32 bit */ | |
8200 | *ret &= 0xffffffff; | |
8201 | ||
f9eb4af6 EK |
8202 | /* Checks for #GP/#SS exceptions. */ |
8203 | exn = false; | |
ff30ef40 QC |
8204 | if (is_long_mode(vcpu)) { |
8205 | /* Long mode: #GP(0)/#SS(0) if the memory address is in a | |
8206 | * non-canonical form. This is the only check on the memory | |
8207 | * destination for long mode! | |
8208 | */ | |
fd8cb433 | 8209 | exn = is_noncanonical_address(*ret, vcpu); |
ff30ef40 | 8210 | } else if (is_protmode(vcpu)) { |
f9eb4af6 EK |
8211 | /* Protected mode: apply checks for segment validity in the |
8212 | * following order: | |
8213 | * - segment type check (#GP(0) may be thrown) | |
8214 | * - usability check (#GP(0)/#SS(0)) | |
8215 | * - limit check (#GP(0)/#SS(0)) | |
8216 | */ | |
8217 | if (wr) | |
8218 | /* #GP(0) if the destination operand is located in a | |
8219 | * read-only data segment or any code segment. | |
8220 | */ | |
8221 | exn = ((s.type & 0xa) == 0 || (s.type & 8)); | |
8222 | else | |
8223 | /* #GP(0) if the source operand is located in an | |
8224 | * execute-only code segment | |
8225 | */ | |
8226 | exn = ((s.type & 0xa) == 8); | |
ff30ef40 QC |
8227 | if (exn) { |
8228 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
8229 | return 1; | |
8230 | } | |
f9eb4af6 EK |
8231 | /* Protected mode: #GP(0)/#SS(0) if the segment is unusable. |
8232 | */ | |
8233 | exn = (s.unusable != 0); | |
8234 | /* Protected mode: #GP(0)/#SS(0) if the memory | |
8235 | * operand is outside the segment limit. | |
8236 | */ | |
8237 | exn = exn || (off + sizeof(u64) > s.limit); | |
8238 | } | |
8239 | if (exn) { | |
8240 | kvm_queue_exception_e(vcpu, | |
8241 | seg_reg == VCPU_SREG_SS ? | |
8242 | SS_VECTOR : GP_VECTOR, | |
8243 | 0); | |
8244 | return 1; | |
8245 | } | |
8246 | ||
19677e32 BD |
8247 | return 0; |
8248 | } | |
8249 | ||
cbf71279 | 8250 | static int nested_vmx_get_vmptr(struct kvm_vcpu *vcpu, gpa_t *vmpointer) |
3573e22c BD |
8251 | { |
8252 | gva_t gva; | |
3573e22c | 8253 | struct x86_exception e; |
3573e22c BD |
8254 | |
8255 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
f9eb4af6 | 8256 | vmcs_read32(VMX_INSTRUCTION_INFO), false, &gva)) |
3573e22c BD |
8257 | return 1; |
8258 | ||
ce14e868 | 8259 | if (kvm_read_guest_virt(vcpu, gva, vmpointer, sizeof(*vmpointer), &e)) { |
3573e22c BD |
8260 | kvm_inject_page_fault(vcpu, &e); |
8261 | return 1; | |
8262 | } | |
8263 | ||
3573e22c BD |
8264 | return 0; |
8265 | } | |
8266 | ||
abfc52c6 LA |
8267 | /* |
8268 | * Allocate a shadow VMCS and associate it with the currently loaded | |
8269 | * VMCS, unless such a shadow VMCS already exists. The newly allocated | |
8270 | * VMCS is also VMCLEARed, so that it is ready for use. | |
8271 | */ | |
8272 | static struct vmcs *alloc_shadow_vmcs(struct kvm_vcpu *vcpu) | |
8273 | { | |
8274 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
8275 | struct loaded_vmcs *loaded_vmcs = vmx->loaded_vmcs; | |
8276 | ||
8277 | /* | |
8278 | * We should allocate a shadow vmcs for vmcs01 only when L1 | |
8279 | * executes VMXON and free it when L1 executes VMXOFF. | |
8280 | * As it is invalid to execute VMXON twice, we shouldn't reach | |
8281 | * here when vmcs01 already have an allocated shadow vmcs. | |
8282 | */ | |
8283 | WARN_ON(loaded_vmcs == &vmx->vmcs01 && loaded_vmcs->shadow_vmcs); | |
8284 | ||
8285 | if (!loaded_vmcs->shadow_vmcs) { | |
8286 | loaded_vmcs->shadow_vmcs = alloc_vmcs(true); | |
8287 | if (loaded_vmcs->shadow_vmcs) | |
8288 | vmcs_clear(loaded_vmcs->shadow_vmcs); | |
8289 | } | |
8290 | return loaded_vmcs->shadow_vmcs; | |
8291 | } | |
8292 | ||
e29acc55 JM |
8293 | static int enter_vmx_operation(struct kvm_vcpu *vcpu) |
8294 | { | |
8295 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
f21f165e | 8296 | int r; |
e29acc55 | 8297 | |
f21f165e PB |
8298 | r = alloc_loaded_vmcs(&vmx->nested.vmcs02); |
8299 | if (r < 0) | |
de3a0021 | 8300 | goto out_vmcs02; |
e29acc55 JM |
8301 | |
8302 | vmx->nested.cached_vmcs12 = kmalloc(VMCS12_SIZE, GFP_KERNEL); | |
8303 | if (!vmx->nested.cached_vmcs12) | |
8304 | goto out_cached_vmcs12; | |
8305 | ||
61ada748 LA |
8306 | vmx->nested.cached_shadow_vmcs12 = kmalloc(VMCS12_SIZE, GFP_KERNEL); |
8307 | if (!vmx->nested.cached_shadow_vmcs12) | |
8308 | goto out_cached_shadow_vmcs12; | |
8309 | ||
abfc52c6 LA |
8310 | if (enable_shadow_vmcs && !alloc_shadow_vmcs(vcpu)) |
8311 | goto out_shadow_vmcs; | |
e29acc55 | 8312 | |
e29acc55 JM |
8313 | hrtimer_init(&vmx->nested.preemption_timer, CLOCK_MONOTONIC, |
8314 | HRTIMER_MODE_REL_PINNED); | |
8315 | vmx->nested.preemption_timer.function = vmx_preemption_timer_fn; | |
8316 | ||
63aff655 RK |
8317 | vmx->nested.vpid02 = allocate_vpid(); |
8318 | ||
9d6105b2 | 8319 | vmx->nested.vmcs02_initialized = false; |
e29acc55 JM |
8320 | vmx->nested.vmxon = true; |
8321 | return 0; | |
8322 | ||
8323 | out_shadow_vmcs: | |
61ada748 LA |
8324 | kfree(vmx->nested.cached_shadow_vmcs12); |
8325 | ||
8326 | out_cached_shadow_vmcs12: | |
e29acc55 JM |
8327 | kfree(vmx->nested.cached_vmcs12); |
8328 | ||
8329 | out_cached_vmcs12: | |
de3a0021 | 8330 | free_loaded_vmcs(&vmx->nested.vmcs02); |
e29acc55 | 8331 | |
de3a0021 | 8332 | out_vmcs02: |
e29acc55 JM |
8333 | return -ENOMEM; |
8334 | } | |
8335 | ||
ec378aee NHE |
8336 | /* |
8337 | * Emulate the VMXON instruction. | |
8338 | * Currently, we just remember that VMX is active, and do not save or even | |
8339 | * inspect the argument to VMXON (the so-called "VMXON pointer") because we | |
8340 | * do not currently need to store anything in that guest-allocated memory | |
8341 | * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their | |
8342 | * argument is different from the VMXON pointer (which the spec says they do). | |
8343 | */ | |
8344 | static int handle_vmon(struct kvm_vcpu *vcpu) | |
8345 | { | |
e29acc55 | 8346 | int ret; |
cbf71279 RK |
8347 | gpa_t vmptr; |
8348 | struct page *page; | |
ec378aee | 8349 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
b3897a49 NHE |
8350 | const u64 VMXON_NEEDED_FEATURES = FEATURE_CONTROL_LOCKED |
8351 | | FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
ec378aee | 8352 | |
70f3aac9 JM |
8353 | /* |
8354 | * The Intel VMX Instruction Reference lists a bunch of bits that are | |
8355 | * prerequisite to running VMXON, most notably cr4.VMXE must be set to | |
8356 | * 1 (see vmx_set_cr4() for when we allow the guest to set this). | |
8357 | * Otherwise, we should fail with #UD. But most faulting conditions | |
8358 | * have already been checked by hardware, prior to the VM-exit for | |
8359 | * VMXON. We do test guest cr4.VMXE because processor CR4 always has | |
8360 | * that bit set to 1 in non-root mode. | |
ec378aee | 8361 | */ |
70f3aac9 | 8362 | if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE)) { |
ec378aee NHE |
8363 | kvm_queue_exception(vcpu, UD_VECTOR); |
8364 | return 1; | |
8365 | } | |
8366 | ||
727ba748 FW |
8367 | /* CPL=0 must be checked manually. */ |
8368 | if (vmx_get_cpl(vcpu)) { | |
36090bf4 | 8369 | kvm_inject_gp(vcpu, 0); |
727ba748 FW |
8370 | return 1; |
8371 | } | |
8372 | ||
09abb5e3 SC |
8373 | if (vmx->nested.vmxon) |
8374 | return nested_vmx_failValid(vcpu, | |
8375 | VMXERR_VMXON_IN_VMX_ROOT_OPERATION); | |
b3897a49 | 8376 | |
3b84080b | 8377 | if ((vmx->msr_ia32_feature_control & VMXON_NEEDED_FEATURES) |
b3897a49 NHE |
8378 | != VMXON_NEEDED_FEATURES) { |
8379 | kvm_inject_gp(vcpu, 0); | |
8380 | return 1; | |
8381 | } | |
8382 | ||
cbf71279 | 8383 | if (nested_vmx_get_vmptr(vcpu, &vmptr)) |
21e7fbe7 | 8384 | return 1; |
cbf71279 RK |
8385 | |
8386 | /* | |
8387 | * SDM 3: 24.11.5 | |
8388 | * The first 4 bytes of VMXON region contain the supported | |
8389 | * VMCS revision identifier | |
8390 | * | |
8391 | * Note - IA32_VMX_BASIC[48] will never be 1 for the nested case; | |
8392 | * which replaces physical address width with 32 | |
8393 | */ | |
09abb5e3 SC |
8394 | if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu))) |
8395 | return nested_vmx_failInvalid(vcpu); | |
cbf71279 | 8396 | |
5e2f30b7 | 8397 | page = kvm_vcpu_gpa_to_page(vcpu, vmptr); |
09abb5e3 SC |
8398 | if (is_error_page(page)) |
8399 | return nested_vmx_failInvalid(vcpu); | |
8400 | ||
cbf71279 RK |
8401 | if (*(u32 *)kmap(page) != VMCS12_REVISION) { |
8402 | kunmap(page); | |
53a70daf | 8403 | kvm_release_page_clean(page); |
09abb5e3 | 8404 | return nested_vmx_failInvalid(vcpu); |
cbf71279 RK |
8405 | } |
8406 | kunmap(page); | |
53a70daf | 8407 | kvm_release_page_clean(page); |
cbf71279 RK |
8408 | |
8409 | vmx->nested.vmxon_ptr = vmptr; | |
e29acc55 JM |
8410 | ret = enter_vmx_operation(vcpu); |
8411 | if (ret) | |
8412 | return ret; | |
ec378aee | 8413 | |
09abb5e3 | 8414 | return nested_vmx_succeed(vcpu); |
ec378aee NHE |
8415 | } |
8416 | ||
8417 | /* | |
8418 | * Intel's VMX Instruction Reference specifies a common set of prerequisites | |
8419 | * for running VMX instructions (except VMXON, whose prerequisites are | |
8420 | * slightly different). It also specifies what exception to inject otherwise. | |
70f3aac9 JM |
8421 | * Note that many of these exceptions have priority over VM exits, so they |
8422 | * don't have to be checked again here. | |
ec378aee NHE |
8423 | */ |
8424 | static int nested_vmx_check_permission(struct kvm_vcpu *vcpu) | |
8425 | { | |
e49fcb8b | 8426 | if (!to_vmx(vcpu)->nested.vmxon) { |
727ba748 FW |
8427 | kvm_queue_exception(vcpu, UD_VECTOR); |
8428 | return 0; | |
8429 | } | |
8430 | ||
e49fcb8b JM |
8431 | if (vmx_get_cpl(vcpu)) { |
8432 | kvm_inject_gp(vcpu, 0); | |
ec378aee NHE |
8433 | return 0; |
8434 | } | |
e49fcb8b | 8435 | |
ec378aee NHE |
8436 | return 1; |
8437 | } | |
8438 | ||
8ca44e88 DM |
8439 | static void vmx_disable_shadow_vmcs(struct vcpu_vmx *vmx) |
8440 | { | |
8441 | vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL, SECONDARY_EXEC_SHADOW_VMCS); | |
8442 | vmcs_write64(VMCS_LINK_POINTER, -1ull); | |
8443 | } | |
8444 | ||
b8bbab92 VK |
8445 | static inline void nested_release_evmcs(struct kvm_vcpu *vcpu) |
8446 | { | |
8447 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
8448 | ||
8449 | if (!vmx->nested.hv_evmcs) | |
8450 | return; | |
8451 | ||
8452 | kunmap(vmx->nested.hv_evmcs_page); | |
8453 | kvm_release_page_dirty(vmx->nested.hv_evmcs_page); | |
8454 | vmx->nested.hv_evmcs_vmptr = -1ull; | |
8455 | vmx->nested.hv_evmcs_page = NULL; | |
8456 | vmx->nested.hv_evmcs = NULL; | |
8457 | } | |
8458 | ||
14c07ad8 | 8459 | static inline void nested_release_vmcs12(struct kvm_vcpu *vcpu) |
e7953d7f | 8460 | { |
14c07ad8 VK |
8461 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8462 | ||
9a2a05b9 PB |
8463 | if (vmx->nested.current_vmptr == -1ull) |
8464 | return; | |
8465 | ||
012f83cb | 8466 | if (enable_shadow_vmcs) { |
9a2a05b9 PB |
8467 | /* copy to memory all shadowed fields in case |
8468 | they were modified */ | |
8469 | copy_shadow_to_vmcs12(vmx); | |
945679e3 | 8470 | vmx->nested.need_vmcs12_sync = false; |
8ca44e88 | 8471 | vmx_disable_shadow_vmcs(vmx); |
012f83cb | 8472 | } |
705699a1 | 8473 | vmx->nested.posted_intr_nv = -1; |
4f2777bc DM |
8474 | |
8475 | /* Flush VMCS12 to guest memory */ | |
14c07ad8 | 8476 | kvm_vcpu_write_guest_page(vcpu, |
9f744c59 PB |
8477 | vmx->nested.current_vmptr >> PAGE_SHIFT, |
8478 | vmx->nested.cached_vmcs12, 0, VMCS12_SIZE); | |
4f2777bc | 8479 | |
14c07ad8 VK |
8480 | kvm_mmu_free_roots(vcpu, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL); |
8481 | ||
9a2a05b9 | 8482 | vmx->nested.current_vmptr = -1ull; |
e7953d7f AG |
8483 | } |
8484 | ||
ec378aee NHE |
8485 | /* |
8486 | * Free whatever needs to be freed from vmx->nested when L1 goes down, or | |
8487 | * just stops using VMX. | |
8488 | */ | |
14c07ad8 | 8489 | static void free_nested(struct kvm_vcpu *vcpu) |
ec378aee | 8490 | { |
14c07ad8 VK |
8491 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8492 | ||
b7455825 | 8493 | if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon) |
ec378aee | 8494 | return; |
9a2a05b9 | 8495 | |
ec378aee | 8496 | vmx->nested.vmxon = false; |
b7455825 | 8497 | vmx->nested.smm.vmxon = false; |
5c614b35 | 8498 | free_vpid(vmx->nested.vpid02); |
8ca44e88 DM |
8499 | vmx->nested.posted_intr_nv = -1; |
8500 | vmx->nested.current_vmptr = -1ull; | |
355f4fb1 | 8501 | if (enable_shadow_vmcs) { |
8ca44e88 | 8502 | vmx_disable_shadow_vmcs(vmx); |
355f4fb1 JM |
8503 | vmcs_clear(vmx->vmcs01.shadow_vmcs); |
8504 | free_vmcs(vmx->vmcs01.shadow_vmcs); | |
8505 | vmx->vmcs01.shadow_vmcs = NULL; | |
8506 | } | |
4f2777bc | 8507 | kfree(vmx->nested.cached_vmcs12); |
61ada748 | 8508 | kfree(vmx->nested.cached_shadow_vmcs12); |
de3a0021 | 8509 | /* Unpin physical memory we referred to in the vmcs02 */ |
fe3ef05c | 8510 | if (vmx->nested.apic_access_page) { |
53a70daf | 8511 | kvm_release_page_dirty(vmx->nested.apic_access_page); |
48d89b92 | 8512 | vmx->nested.apic_access_page = NULL; |
fe3ef05c | 8513 | } |
a7c0b07d | 8514 | if (vmx->nested.virtual_apic_page) { |
53a70daf | 8515 | kvm_release_page_dirty(vmx->nested.virtual_apic_page); |
48d89b92 | 8516 | vmx->nested.virtual_apic_page = NULL; |
a7c0b07d | 8517 | } |
705699a1 WV |
8518 | if (vmx->nested.pi_desc_page) { |
8519 | kunmap(vmx->nested.pi_desc_page); | |
53a70daf | 8520 | kvm_release_page_dirty(vmx->nested.pi_desc_page); |
705699a1 WV |
8521 | vmx->nested.pi_desc_page = NULL; |
8522 | vmx->nested.pi_desc = NULL; | |
8523 | } | |
ff2f6fe9 | 8524 | |
14c07ad8 VK |
8525 | kvm_mmu_free_roots(vcpu, &vcpu->arch.guest_mmu, KVM_MMU_ROOTS_ALL); |
8526 | ||
b8bbab92 VK |
8527 | nested_release_evmcs(vcpu); |
8528 | ||
de3a0021 | 8529 | free_loaded_vmcs(&vmx->nested.vmcs02); |
ec378aee NHE |
8530 | } |
8531 | ||
8532 | /* Emulate the VMXOFF instruction */ | |
8533 | static int handle_vmoff(struct kvm_vcpu *vcpu) | |
8534 | { | |
8535 | if (!nested_vmx_check_permission(vcpu)) | |
8536 | return 1; | |
14c07ad8 | 8537 | free_nested(vcpu); |
09abb5e3 | 8538 | return nested_vmx_succeed(vcpu); |
ec378aee NHE |
8539 | } |
8540 | ||
27d6c865 NHE |
8541 | /* Emulate the VMCLEAR instruction */ |
8542 | static int handle_vmclear(struct kvm_vcpu *vcpu) | |
8543 | { | |
8544 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
587d7e72 | 8545 | u32 zero = 0; |
27d6c865 | 8546 | gpa_t vmptr; |
27d6c865 NHE |
8547 | |
8548 | if (!nested_vmx_check_permission(vcpu)) | |
8549 | return 1; | |
8550 | ||
cbf71279 | 8551 | if (nested_vmx_get_vmptr(vcpu, &vmptr)) |
27d6c865 | 8552 | return 1; |
27d6c865 | 8553 | |
09abb5e3 SC |
8554 | if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu))) |
8555 | return nested_vmx_failValid(vcpu, | |
8556 | VMXERR_VMCLEAR_INVALID_ADDRESS); | |
cbf71279 | 8557 | |
09abb5e3 SC |
8558 | if (vmptr == vmx->nested.vmxon_ptr) |
8559 | return nested_vmx_failValid(vcpu, | |
8560 | VMXERR_VMCLEAR_VMXON_POINTER); | |
cbf71279 | 8561 | |
b8bbab92 VK |
8562 | if (vmx->nested.hv_evmcs_page) { |
8563 | if (vmptr == vmx->nested.hv_evmcs_vmptr) | |
8564 | nested_release_evmcs(vcpu); | |
8565 | } else { | |
8566 | if (vmptr == vmx->nested.current_vmptr) | |
8567 | nested_release_vmcs12(vcpu); | |
27d6c865 | 8568 | |
b8bbab92 VK |
8569 | kvm_vcpu_write_guest(vcpu, |
8570 | vmptr + offsetof(struct vmcs12, | |
8571 | launch_state), | |
8572 | &zero, sizeof(zero)); | |
8573 | } | |
27d6c865 | 8574 | |
09abb5e3 | 8575 | return nested_vmx_succeed(vcpu); |
27d6c865 NHE |
8576 | } |
8577 | ||
cd232ad0 NHE |
8578 | static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch); |
8579 | ||
8580 | /* Emulate the VMLAUNCH instruction */ | |
8581 | static int handle_vmlaunch(struct kvm_vcpu *vcpu) | |
8582 | { | |
8583 | return nested_vmx_run(vcpu, true); | |
8584 | } | |
8585 | ||
8586 | /* Emulate the VMRESUME instruction */ | |
8587 | static int handle_vmresume(struct kvm_vcpu *vcpu) | |
8588 | { | |
8589 | ||
8590 | return nested_vmx_run(vcpu, false); | |
8591 | } | |
8592 | ||
49f705c5 NHE |
8593 | /* |
8594 | * Read a vmcs12 field. Since these can have varying lengths and we return | |
8595 | * one type, we chose the biggest type (u64) and zero-extend the return value | |
8596 | * to that size. Note that the caller, handle_vmread, might need to use only | |
8597 | * some of the bits we return here (e.g., on 32-bit guests, only 32 bits of | |
8598 | * 64-bit fields are to be returned). | |
8599 | */ | |
e2536742 | 8600 | static inline int vmcs12_read_any(struct vmcs12 *vmcs12, |
a2ae9df7 | 8601 | unsigned long field, u64 *ret) |
49f705c5 NHE |
8602 | { |
8603 | short offset = vmcs_field_to_offset(field); | |
8604 | char *p; | |
8605 | ||
8606 | if (offset < 0) | |
a2ae9df7 | 8607 | return offset; |
49f705c5 | 8608 | |
e2536742 | 8609 | p = (char *)vmcs12 + offset; |
49f705c5 | 8610 | |
d37f4267 JM |
8611 | switch (vmcs_field_width(field)) { |
8612 | case VMCS_FIELD_WIDTH_NATURAL_WIDTH: | |
49f705c5 | 8613 | *ret = *((natural_width *)p); |
a2ae9df7 | 8614 | return 0; |
d37f4267 | 8615 | case VMCS_FIELD_WIDTH_U16: |
49f705c5 | 8616 | *ret = *((u16 *)p); |
a2ae9df7 | 8617 | return 0; |
d37f4267 | 8618 | case VMCS_FIELD_WIDTH_U32: |
49f705c5 | 8619 | *ret = *((u32 *)p); |
a2ae9df7 | 8620 | return 0; |
d37f4267 | 8621 | case VMCS_FIELD_WIDTH_U64: |
49f705c5 | 8622 | *ret = *((u64 *)p); |
a2ae9df7 | 8623 | return 0; |
49f705c5 | 8624 | default: |
a2ae9df7 PB |
8625 | WARN_ON(1); |
8626 | return -ENOENT; | |
49f705c5 NHE |
8627 | } |
8628 | } | |
8629 | ||
20b97fea | 8630 | |
e2536742 | 8631 | static inline int vmcs12_write_any(struct vmcs12 *vmcs12, |
a2ae9df7 | 8632 | unsigned long field, u64 field_value){ |
20b97fea | 8633 | short offset = vmcs_field_to_offset(field); |
e2536742 | 8634 | char *p = (char *)vmcs12 + offset; |
20b97fea | 8635 | if (offset < 0) |
a2ae9df7 | 8636 | return offset; |
20b97fea | 8637 | |
d37f4267 JM |
8638 | switch (vmcs_field_width(field)) { |
8639 | case VMCS_FIELD_WIDTH_U16: | |
20b97fea | 8640 | *(u16 *)p = field_value; |
a2ae9df7 | 8641 | return 0; |
d37f4267 | 8642 | case VMCS_FIELD_WIDTH_U32: |
20b97fea | 8643 | *(u32 *)p = field_value; |
a2ae9df7 | 8644 | return 0; |
d37f4267 | 8645 | case VMCS_FIELD_WIDTH_U64: |
20b97fea | 8646 | *(u64 *)p = field_value; |
a2ae9df7 | 8647 | return 0; |
d37f4267 | 8648 | case VMCS_FIELD_WIDTH_NATURAL_WIDTH: |
20b97fea | 8649 | *(natural_width *)p = field_value; |
a2ae9df7 | 8650 | return 0; |
20b97fea | 8651 | default: |
a2ae9df7 PB |
8652 | WARN_ON(1); |
8653 | return -ENOENT; | |
20b97fea AG |
8654 | } |
8655 | ||
8656 | } | |
8657 | ||
945679e3 VK |
8658 | static int copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx) |
8659 | { | |
8660 | struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12; | |
8661 | struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs; | |
8662 | ||
b8bbab92 VK |
8663 | vmcs12->hdr.revision_id = evmcs->revision_id; |
8664 | ||
945679e3 VK |
8665 | /* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE */ |
8666 | vmcs12->tpr_threshold = evmcs->tpr_threshold; | |
8667 | vmcs12->guest_rip = evmcs->guest_rip; | |
8668 | ||
8669 | if (unlikely(!(evmcs->hv_clean_fields & | |
8670 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC))) { | |
8671 | vmcs12->guest_rsp = evmcs->guest_rsp; | |
8672 | vmcs12->guest_rflags = evmcs->guest_rflags; | |
8673 | vmcs12->guest_interruptibility_info = | |
8674 | evmcs->guest_interruptibility_info; | |
8675 | } | |
8676 | ||
8677 | if (unlikely(!(evmcs->hv_clean_fields & | |
8678 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC))) { | |
8679 | vmcs12->cpu_based_vm_exec_control = | |
8680 | evmcs->cpu_based_vm_exec_control; | |
8681 | } | |
8682 | ||
8683 | if (unlikely(!(evmcs->hv_clean_fields & | |
8684 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC))) { | |
8685 | vmcs12->exception_bitmap = evmcs->exception_bitmap; | |
8686 | } | |
8687 | ||
8688 | if (unlikely(!(evmcs->hv_clean_fields & | |
8689 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY))) { | |
8690 | vmcs12->vm_entry_controls = evmcs->vm_entry_controls; | |
8691 | } | |
8692 | ||
8693 | if (unlikely(!(evmcs->hv_clean_fields & | |
8694 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT))) { | |
8695 | vmcs12->vm_entry_intr_info_field = | |
8696 | evmcs->vm_entry_intr_info_field; | |
8697 | vmcs12->vm_entry_exception_error_code = | |
8698 | evmcs->vm_entry_exception_error_code; | |
8699 | vmcs12->vm_entry_instruction_len = | |
8700 | evmcs->vm_entry_instruction_len; | |
8701 | } | |
8702 | ||
8703 | if (unlikely(!(evmcs->hv_clean_fields & | |
8704 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1))) { | |
8705 | vmcs12->host_ia32_pat = evmcs->host_ia32_pat; | |
8706 | vmcs12->host_ia32_efer = evmcs->host_ia32_efer; | |
8707 | vmcs12->host_cr0 = evmcs->host_cr0; | |
8708 | vmcs12->host_cr3 = evmcs->host_cr3; | |
8709 | vmcs12->host_cr4 = evmcs->host_cr4; | |
8710 | vmcs12->host_ia32_sysenter_esp = evmcs->host_ia32_sysenter_esp; | |
8711 | vmcs12->host_ia32_sysenter_eip = evmcs->host_ia32_sysenter_eip; | |
8712 | vmcs12->host_rip = evmcs->host_rip; | |
8713 | vmcs12->host_ia32_sysenter_cs = evmcs->host_ia32_sysenter_cs; | |
8714 | vmcs12->host_es_selector = evmcs->host_es_selector; | |
8715 | vmcs12->host_cs_selector = evmcs->host_cs_selector; | |
8716 | vmcs12->host_ss_selector = evmcs->host_ss_selector; | |
8717 | vmcs12->host_ds_selector = evmcs->host_ds_selector; | |
8718 | vmcs12->host_fs_selector = evmcs->host_fs_selector; | |
8719 | vmcs12->host_gs_selector = evmcs->host_gs_selector; | |
8720 | vmcs12->host_tr_selector = evmcs->host_tr_selector; | |
8721 | } | |
8722 | ||
8723 | if (unlikely(!(evmcs->hv_clean_fields & | |
8724 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1))) { | |
8725 | vmcs12->pin_based_vm_exec_control = | |
8726 | evmcs->pin_based_vm_exec_control; | |
8727 | vmcs12->vm_exit_controls = evmcs->vm_exit_controls; | |
8728 | vmcs12->secondary_vm_exec_control = | |
8729 | evmcs->secondary_vm_exec_control; | |
8730 | } | |
8731 | ||
8732 | if (unlikely(!(evmcs->hv_clean_fields & | |
8733 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP))) { | |
8734 | vmcs12->io_bitmap_a = evmcs->io_bitmap_a; | |
8735 | vmcs12->io_bitmap_b = evmcs->io_bitmap_b; | |
8736 | } | |
8737 | ||
8738 | if (unlikely(!(evmcs->hv_clean_fields & | |
8739 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP))) { | |
8740 | vmcs12->msr_bitmap = evmcs->msr_bitmap; | |
8741 | } | |
8742 | ||
8743 | if (unlikely(!(evmcs->hv_clean_fields & | |
8744 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2))) { | |
8745 | vmcs12->guest_es_base = evmcs->guest_es_base; | |
8746 | vmcs12->guest_cs_base = evmcs->guest_cs_base; | |
8747 | vmcs12->guest_ss_base = evmcs->guest_ss_base; | |
8748 | vmcs12->guest_ds_base = evmcs->guest_ds_base; | |
8749 | vmcs12->guest_fs_base = evmcs->guest_fs_base; | |
8750 | vmcs12->guest_gs_base = evmcs->guest_gs_base; | |
8751 | vmcs12->guest_ldtr_base = evmcs->guest_ldtr_base; | |
8752 | vmcs12->guest_tr_base = evmcs->guest_tr_base; | |
8753 | vmcs12->guest_gdtr_base = evmcs->guest_gdtr_base; | |
8754 | vmcs12->guest_idtr_base = evmcs->guest_idtr_base; | |
8755 | vmcs12->guest_es_limit = evmcs->guest_es_limit; | |
8756 | vmcs12->guest_cs_limit = evmcs->guest_cs_limit; | |
8757 | vmcs12->guest_ss_limit = evmcs->guest_ss_limit; | |
8758 | vmcs12->guest_ds_limit = evmcs->guest_ds_limit; | |
8759 | vmcs12->guest_fs_limit = evmcs->guest_fs_limit; | |
8760 | vmcs12->guest_gs_limit = evmcs->guest_gs_limit; | |
8761 | vmcs12->guest_ldtr_limit = evmcs->guest_ldtr_limit; | |
8762 | vmcs12->guest_tr_limit = evmcs->guest_tr_limit; | |
8763 | vmcs12->guest_gdtr_limit = evmcs->guest_gdtr_limit; | |
8764 | vmcs12->guest_idtr_limit = evmcs->guest_idtr_limit; | |
8765 | vmcs12->guest_es_ar_bytes = evmcs->guest_es_ar_bytes; | |
8766 | vmcs12->guest_cs_ar_bytes = evmcs->guest_cs_ar_bytes; | |
8767 | vmcs12->guest_ss_ar_bytes = evmcs->guest_ss_ar_bytes; | |
8768 | vmcs12->guest_ds_ar_bytes = evmcs->guest_ds_ar_bytes; | |
8769 | vmcs12->guest_fs_ar_bytes = evmcs->guest_fs_ar_bytes; | |
8770 | vmcs12->guest_gs_ar_bytes = evmcs->guest_gs_ar_bytes; | |
8771 | vmcs12->guest_ldtr_ar_bytes = evmcs->guest_ldtr_ar_bytes; | |
8772 | vmcs12->guest_tr_ar_bytes = evmcs->guest_tr_ar_bytes; | |
8773 | vmcs12->guest_es_selector = evmcs->guest_es_selector; | |
8774 | vmcs12->guest_cs_selector = evmcs->guest_cs_selector; | |
8775 | vmcs12->guest_ss_selector = evmcs->guest_ss_selector; | |
8776 | vmcs12->guest_ds_selector = evmcs->guest_ds_selector; | |
8777 | vmcs12->guest_fs_selector = evmcs->guest_fs_selector; | |
8778 | vmcs12->guest_gs_selector = evmcs->guest_gs_selector; | |
8779 | vmcs12->guest_ldtr_selector = evmcs->guest_ldtr_selector; | |
8780 | vmcs12->guest_tr_selector = evmcs->guest_tr_selector; | |
8781 | } | |
8782 | ||
8783 | if (unlikely(!(evmcs->hv_clean_fields & | |
8784 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2))) { | |
8785 | vmcs12->tsc_offset = evmcs->tsc_offset; | |
8786 | vmcs12->virtual_apic_page_addr = evmcs->virtual_apic_page_addr; | |
8787 | vmcs12->xss_exit_bitmap = evmcs->xss_exit_bitmap; | |
8788 | } | |
8789 | ||
8790 | if (unlikely(!(evmcs->hv_clean_fields & | |
8791 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR))) { | |
8792 | vmcs12->cr0_guest_host_mask = evmcs->cr0_guest_host_mask; | |
8793 | vmcs12->cr4_guest_host_mask = evmcs->cr4_guest_host_mask; | |
8794 | vmcs12->cr0_read_shadow = evmcs->cr0_read_shadow; | |
8795 | vmcs12->cr4_read_shadow = evmcs->cr4_read_shadow; | |
8796 | vmcs12->guest_cr0 = evmcs->guest_cr0; | |
8797 | vmcs12->guest_cr3 = evmcs->guest_cr3; | |
8798 | vmcs12->guest_cr4 = evmcs->guest_cr4; | |
8799 | vmcs12->guest_dr7 = evmcs->guest_dr7; | |
8800 | } | |
8801 | ||
8802 | if (unlikely(!(evmcs->hv_clean_fields & | |
8803 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER))) { | |
8804 | vmcs12->host_fs_base = evmcs->host_fs_base; | |
8805 | vmcs12->host_gs_base = evmcs->host_gs_base; | |
8806 | vmcs12->host_tr_base = evmcs->host_tr_base; | |
8807 | vmcs12->host_gdtr_base = evmcs->host_gdtr_base; | |
8808 | vmcs12->host_idtr_base = evmcs->host_idtr_base; | |
8809 | vmcs12->host_rsp = evmcs->host_rsp; | |
8810 | } | |
8811 | ||
8812 | if (unlikely(!(evmcs->hv_clean_fields & | |
8813 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT))) { | |
8814 | vmcs12->ept_pointer = evmcs->ept_pointer; | |
8815 | vmcs12->virtual_processor_id = evmcs->virtual_processor_id; | |
8816 | } | |
8817 | ||
8818 | if (unlikely(!(evmcs->hv_clean_fields & | |
8819 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1))) { | |
8820 | vmcs12->vmcs_link_pointer = evmcs->vmcs_link_pointer; | |
8821 | vmcs12->guest_ia32_debugctl = evmcs->guest_ia32_debugctl; | |
8822 | vmcs12->guest_ia32_pat = evmcs->guest_ia32_pat; | |
8823 | vmcs12->guest_ia32_efer = evmcs->guest_ia32_efer; | |
8824 | vmcs12->guest_pdptr0 = evmcs->guest_pdptr0; | |
8825 | vmcs12->guest_pdptr1 = evmcs->guest_pdptr1; | |
8826 | vmcs12->guest_pdptr2 = evmcs->guest_pdptr2; | |
8827 | vmcs12->guest_pdptr3 = evmcs->guest_pdptr3; | |
8828 | vmcs12->guest_pending_dbg_exceptions = | |
8829 | evmcs->guest_pending_dbg_exceptions; | |
8830 | vmcs12->guest_sysenter_esp = evmcs->guest_sysenter_esp; | |
8831 | vmcs12->guest_sysenter_eip = evmcs->guest_sysenter_eip; | |
8832 | vmcs12->guest_bndcfgs = evmcs->guest_bndcfgs; | |
8833 | vmcs12->guest_activity_state = evmcs->guest_activity_state; | |
8834 | vmcs12->guest_sysenter_cs = evmcs->guest_sysenter_cs; | |
8835 | } | |
8836 | ||
8837 | /* | |
8838 | * Not used? | |
8839 | * vmcs12->vm_exit_msr_store_addr = evmcs->vm_exit_msr_store_addr; | |
8840 | * vmcs12->vm_exit_msr_load_addr = evmcs->vm_exit_msr_load_addr; | |
8841 | * vmcs12->vm_entry_msr_load_addr = evmcs->vm_entry_msr_load_addr; | |
8842 | * vmcs12->cr3_target_value0 = evmcs->cr3_target_value0; | |
8843 | * vmcs12->cr3_target_value1 = evmcs->cr3_target_value1; | |
8844 | * vmcs12->cr3_target_value2 = evmcs->cr3_target_value2; | |
8845 | * vmcs12->cr3_target_value3 = evmcs->cr3_target_value3; | |
8846 | * vmcs12->page_fault_error_code_mask = | |
8847 | * evmcs->page_fault_error_code_mask; | |
8848 | * vmcs12->page_fault_error_code_match = | |
8849 | * evmcs->page_fault_error_code_match; | |
8850 | * vmcs12->cr3_target_count = evmcs->cr3_target_count; | |
8851 | * vmcs12->vm_exit_msr_store_count = evmcs->vm_exit_msr_store_count; | |
8852 | * vmcs12->vm_exit_msr_load_count = evmcs->vm_exit_msr_load_count; | |
8853 | * vmcs12->vm_entry_msr_load_count = evmcs->vm_entry_msr_load_count; | |
8854 | */ | |
8855 | ||
8856 | /* | |
8857 | * Read only fields: | |
8858 | * vmcs12->guest_physical_address = evmcs->guest_physical_address; | |
8859 | * vmcs12->vm_instruction_error = evmcs->vm_instruction_error; | |
8860 | * vmcs12->vm_exit_reason = evmcs->vm_exit_reason; | |
8861 | * vmcs12->vm_exit_intr_info = evmcs->vm_exit_intr_info; | |
8862 | * vmcs12->vm_exit_intr_error_code = evmcs->vm_exit_intr_error_code; | |
8863 | * vmcs12->idt_vectoring_info_field = evmcs->idt_vectoring_info_field; | |
8864 | * vmcs12->idt_vectoring_error_code = evmcs->idt_vectoring_error_code; | |
8865 | * vmcs12->vm_exit_instruction_len = evmcs->vm_exit_instruction_len; | |
8866 | * vmcs12->vmx_instruction_info = evmcs->vmx_instruction_info; | |
8867 | * vmcs12->exit_qualification = evmcs->exit_qualification; | |
8868 | * vmcs12->guest_linear_address = evmcs->guest_linear_address; | |
8869 | * | |
8870 | * Not present in struct vmcs12: | |
8871 | * vmcs12->exit_io_instruction_ecx = evmcs->exit_io_instruction_ecx; | |
8872 | * vmcs12->exit_io_instruction_esi = evmcs->exit_io_instruction_esi; | |
8873 | * vmcs12->exit_io_instruction_edi = evmcs->exit_io_instruction_edi; | |
8874 | * vmcs12->exit_io_instruction_eip = evmcs->exit_io_instruction_eip; | |
8875 | */ | |
8876 | ||
8877 | return 0; | |
8878 | } | |
8879 | ||
8880 | static int copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx) | |
8881 | { | |
8882 | struct vmcs12 *vmcs12 = vmx->nested.cached_vmcs12; | |
8883 | struct hv_enlightened_vmcs *evmcs = vmx->nested.hv_evmcs; | |
8884 | ||
8885 | /* | |
8886 | * Should not be changed by KVM: | |
8887 | * | |
8888 | * evmcs->host_es_selector = vmcs12->host_es_selector; | |
8889 | * evmcs->host_cs_selector = vmcs12->host_cs_selector; | |
8890 | * evmcs->host_ss_selector = vmcs12->host_ss_selector; | |
8891 | * evmcs->host_ds_selector = vmcs12->host_ds_selector; | |
8892 | * evmcs->host_fs_selector = vmcs12->host_fs_selector; | |
8893 | * evmcs->host_gs_selector = vmcs12->host_gs_selector; | |
8894 | * evmcs->host_tr_selector = vmcs12->host_tr_selector; | |
8895 | * evmcs->host_ia32_pat = vmcs12->host_ia32_pat; | |
8896 | * evmcs->host_ia32_efer = vmcs12->host_ia32_efer; | |
8897 | * evmcs->host_cr0 = vmcs12->host_cr0; | |
8898 | * evmcs->host_cr3 = vmcs12->host_cr3; | |
8899 | * evmcs->host_cr4 = vmcs12->host_cr4; | |
8900 | * evmcs->host_ia32_sysenter_esp = vmcs12->host_ia32_sysenter_esp; | |
8901 | * evmcs->host_ia32_sysenter_eip = vmcs12->host_ia32_sysenter_eip; | |
8902 | * evmcs->host_rip = vmcs12->host_rip; | |
8903 | * evmcs->host_ia32_sysenter_cs = vmcs12->host_ia32_sysenter_cs; | |
8904 | * evmcs->host_fs_base = vmcs12->host_fs_base; | |
8905 | * evmcs->host_gs_base = vmcs12->host_gs_base; | |
8906 | * evmcs->host_tr_base = vmcs12->host_tr_base; | |
8907 | * evmcs->host_gdtr_base = vmcs12->host_gdtr_base; | |
8908 | * evmcs->host_idtr_base = vmcs12->host_idtr_base; | |
8909 | * evmcs->host_rsp = vmcs12->host_rsp; | |
8910 | * sync_vmcs12() doesn't read these: | |
8911 | * evmcs->io_bitmap_a = vmcs12->io_bitmap_a; | |
8912 | * evmcs->io_bitmap_b = vmcs12->io_bitmap_b; | |
8913 | * evmcs->msr_bitmap = vmcs12->msr_bitmap; | |
8914 | * evmcs->ept_pointer = vmcs12->ept_pointer; | |
8915 | * evmcs->xss_exit_bitmap = vmcs12->xss_exit_bitmap; | |
8916 | * evmcs->vm_exit_msr_store_addr = vmcs12->vm_exit_msr_store_addr; | |
8917 | * evmcs->vm_exit_msr_load_addr = vmcs12->vm_exit_msr_load_addr; | |
8918 | * evmcs->vm_entry_msr_load_addr = vmcs12->vm_entry_msr_load_addr; | |
8919 | * evmcs->cr3_target_value0 = vmcs12->cr3_target_value0; | |
8920 | * evmcs->cr3_target_value1 = vmcs12->cr3_target_value1; | |
8921 | * evmcs->cr3_target_value2 = vmcs12->cr3_target_value2; | |
8922 | * evmcs->cr3_target_value3 = vmcs12->cr3_target_value3; | |
8923 | * evmcs->tpr_threshold = vmcs12->tpr_threshold; | |
8924 | * evmcs->virtual_processor_id = vmcs12->virtual_processor_id; | |
8925 | * evmcs->exception_bitmap = vmcs12->exception_bitmap; | |
8926 | * evmcs->vmcs_link_pointer = vmcs12->vmcs_link_pointer; | |
8927 | * evmcs->pin_based_vm_exec_control = vmcs12->pin_based_vm_exec_control; | |
8928 | * evmcs->vm_exit_controls = vmcs12->vm_exit_controls; | |
8929 | * evmcs->secondary_vm_exec_control = vmcs12->secondary_vm_exec_control; | |
8930 | * evmcs->page_fault_error_code_mask = | |
8931 | * vmcs12->page_fault_error_code_mask; | |
8932 | * evmcs->page_fault_error_code_match = | |
8933 | * vmcs12->page_fault_error_code_match; | |
8934 | * evmcs->cr3_target_count = vmcs12->cr3_target_count; | |
8935 | * evmcs->virtual_apic_page_addr = vmcs12->virtual_apic_page_addr; | |
8936 | * evmcs->tsc_offset = vmcs12->tsc_offset; | |
8937 | * evmcs->guest_ia32_debugctl = vmcs12->guest_ia32_debugctl; | |
8938 | * evmcs->cr0_guest_host_mask = vmcs12->cr0_guest_host_mask; | |
8939 | * evmcs->cr4_guest_host_mask = vmcs12->cr4_guest_host_mask; | |
8940 | * evmcs->cr0_read_shadow = vmcs12->cr0_read_shadow; | |
8941 | * evmcs->cr4_read_shadow = vmcs12->cr4_read_shadow; | |
8942 | * evmcs->vm_exit_msr_store_count = vmcs12->vm_exit_msr_store_count; | |
8943 | * evmcs->vm_exit_msr_load_count = vmcs12->vm_exit_msr_load_count; | |
8944 | * evmcs->vm_entry_msr_load_count = vmcs12->vm_entry_msr_load_count; | |
8945 | * | |
8946 | * Not present in struct vmcs12: | |
8947 | * evmcs->exit_io_instruction_ecx = vmcs12->exit_io_instruction_ecx; | |
8948 | * evmcs->exit_io_instruction_esi = vmcs12->exit_io_instruction_esi; | |
8949 | * evmcs->exit_io_instruction_edi = vmcs12->exit_io_instruction_edi; | |
8950 | * evmcs->exit_io_instruction_eip = vmcs12->exit_io_instruction_eip; | |
8951 | */ | |
8952 | ||
8953 | evmcs->guest_es_selector = vmcs12->guest_es_selector; | |
8954 | evmcs->guest_cs_selector = vmcs12->guest_cs_selector; | |
8955 | evmcs->guest_ss_selector = vmcs12->guest_ss_selector; | |
8956 | evmcs->guest_ds_selector = vmcs12->guest_ds_selector; | |
8957 | evmcs->guest_fs_selector = vmcs12->guest_fs_selector; | |
8958 | evmcs->guest_gs_selector = vmcs12->guest_gs_selector; | |
8959 | evmcs->guest_ldtr_selector = vmcs12->guest_ldtr_selector; | |
8960 | evmcs->guest_tr_selector = vmcs12->guest_tr_selector; | |
8961 | ||
8962 | evmcs->guest_es_limit = vmcs12->guest_es_limit; | |
8963 | evmcs->guest_cs_limit = vmcs12->guest_cs_limit; | |
8964 | evmcs->guest_ss_limit = vmcs12->guest_ss_limit; | |
8965 | evmcs->guest_ds_limit = vmcs12->guest_ds_limit; | |
8966 | evmcs->guest_fs_limit = vmcs12->guest_fs_limit; | |
8967 | evmcs->guest_gs_limit = vmcs12->guest_gs_limit; | |
8968 | evmcs->guest_ldtr_limit = vmcs12->guest_ldtr_limit; | |
8969 | evmcs->guest_tr_limit = vmcs12->guest_tr_limit; | |
8970 | evmcs->guest_gdtr_limit = vmcs12->guest_gdtr_limit; | |
8971 | evmcs->guest_idtr_limit = vmcs12->guest_idtr_limit; | |
8972 | ||
8973 | evmcs->guest_es_ar_bytes = vmcs12->guest_es_ar_bytes; | |
8974 | evmcs->guest_cs_ar_bytes = vmcs12->guest_cs_ar_bytes; | |
8975 | evmcs->guest_ss_ar_bytes = vmcs12->guest_ss_ar_bytes; | |
8976 | evmcs->guest_ds_ar_bytes = vmcs12->guest_ds_ar_bytes; | |
8977 | evmcs->guest_fs_ar_bytes = vmcs12->guest_fs_ar_bytes; | |
8978 | evmcs->guest_gs_ar_bytes = vmcs12->guest_gs_ar_bytes; | |
8979 | evmcs->guest_ldtr_ar_bytes = vmcs12->guest_ldtr_ar_bytes; | |
8980 | evmcs->guest_tr_ar_bytes = vmcs12->guest_tr_ar_bytes; | |
8981 | ||
8982 | evmcs->guest_es_base = vmcs12->guest_es_base; | |
8983 | evmcs->guest_cs_base = vmcs12->guest_cs_base; | |
8984 | evmcs->guest_ss_base = vmcs12->guest_ss_base; | |
8985 | evmcs->guest_ds_base = vmcs12->guest_ds_base; | |
8986 | evmcs->guest_fs_base = vmcs12->guest_fs_base; | |
8987 | evmcs->guest_gs_base = vmcs12->guest_gs_base; | |
8988 | evmcs->guest_ldtr_base = vmcs12->guest_ldtr_base; | |
8989 | evmcs->guest_tr_base = vmcs12->guest_tr_base; | |
8990 | evmcs->guest_gdtr_base = vmcs12->guest_gdtr_base; | |
8991 | evmcs->guest_idtr_base = vmcs12->guest_idtr_base; | |
8992 | ||
8993 | evmcs->guest_ia32_pat = vmcs12->guest_ia32_pat; | |
8994 | evmcs->guest_ia32_efer = vmcs12->guest_ia32_efer; | |
8995 | ||
8996 | evmcs->guest_pdptr0 = vmcs12->guest_pdptr0; | |
8997 | evmcs->guest_pdptr1 = vmcs12->guest_pdptr1; | |
8998 | evmcs->guest_pdptr2 = vmcs12->guest_pdptr2; | |
8999 | evmcs->guest_pdptr3 = vmcs12->guest_pdptr3; | |
9000 | ||
9001 | evmcs->guest_pending_dbg_exceptions = | |
9002 | vmcs12->guest_pending_dbg_exceptions; | |
9003 | evmcs->guest_sysenter_esp = vmcs12->guest_sysenter_esp; | |
9004 | evmcs->guest_sysenter_eip = vmcs12->guest_sysenter_eip; | |
9005 | ||
9006 | evmcs->guest_activity_state = vmcs12->guest_activity_state; | |
9007 | evmcs->guest_sysenter_cs = vmcs12->guest_sysenter_cs; | |
9008 | ||
9009 | evmcs->guest_cr0 = vmcs12->guest_cr0; | |
9010 | evmcs->guest_cr3 = vmcs12->guest_cr3; | |
9011 | evmcs->guest_cr4 = vmcs12->guest_cr4; | |
9012 | evmcs->guest_dr7 = vmcs12->guest_dr7; | |
9013 | ||
9014 | evmcs->guest_physical_address = vmcs12->guest_physical_address; | |
9015 | ||
9016 | evmcs->vm_instruction_error = vmcs12->vm_instruction_error; | |
9017 | evmcs->vm_exit_reason = vmcs12->vm_exit_reason; | |
9018 | evmcs->vm_exit_intr_info = vmcs12->vm_exit_intr_info; | |
9019 | evmcs->vm_exit_intr_error_code = vmcs12->vm_exit_intr_error_code; | |
9020 | evmcs->idt_vectoring_info_field = vmcs12->idt_vectoring_info_field; | |
9021 | evmcs->idt_vectoring_error_code = vmcs12->idt_vectoring_error_code; | |
9022 | evmcs->vm_exit_instruction_len = vmcs12->vm_exit_instruction_len; | |
9023 | evmcs->vmx_instruction_info = vmcs12->vmx_instruction_info; | |
9024 | ||
9025 | evmcs->exit_qualification = vmcs12->exit_qualification; | |
9026 | ||
9027 | evmcs->guest_linear_address = vmcs12->guest_linear_address; | |
9028 | evmcs->guest_rsp = vmcs12->guest_rsp; | |
9029 | evmcs->guest_rflags = vmcs12->guest_rflags; | |
9030 | ||
9031 | evmcs->guest_interruptibility_info = | |
9032 | vmcs12->guest_interruptibility_info; | |
9033 | evmcs->cpu_based_vm_exec_control = vmcs12->cpu_based_vm_exec_control; | |
9034 | evmcs->vm_entry_controls = vmcs12->vm_entry_controls; | |
9035 | evmcs->vm_entry_intr_info_field = vmcs12->vm_entry_intr_info_field; | |
9036 | evmcs->vm_entry_exception_error_code = | |
9037 | vmcs12->vm_entry_exception_error_code; | |
9038 | evmcs->vm_entry_instruction_len = vmcs12->vm_entry_instruction_len; | |
9039 | ||
9040 | evmcs->guest_rip = vmcs12->guest_rip; | |
9041 | ||
9042 | evmcs->guest_bndcfgs = vmcs12->guest_bndcfgs; | |
9043 | ||
9044 | return 0; | |
9045 | } | |
9046 | ||
f4160e45 JM |
9047 | /* |
9048 | * Copy the writable VMCS shadow fields back to the VMCS12, in case | |
9049 | * they have been modified by the L1 guest. Note that the "read-only" | |
9050 | * VM-exit information fields are actually writable if the vCPU is | |
9051 | * configured to support "VMWRITE to any supported field in the VMCS." | |
9052 | */ | |
16f5b903 AG |
9053 | static void copy_shadow_to_vmcs12(struct vcpu_vmx *vmx) |
9054 | { | |
f4160e45 JM |
9055 | const u16 *fields[] = { |
9056 | shadow_read_write_fields, | |
9057 | shadow_read_only_fields | |
9058 | }; | |
9059 | const int max_fields[] = { | |
9060 | max_shadow_read_write_fields, | |
9061 | max_shadow_read_only_fields | |
9062 | }; | |
9063 | int i, q; | |
16f5b903 AG |
9064 | unsigned long field; |
9065 | u64 field_value; | |
355f4fb1 | 9066 | struct vmcs *shadow_vmcs = vmx->vmcs01.shadow_vmcs; |
16f5b903 | 9067 | |
282da870 JK |
9068 | preempt_disable(); |
9069 | ||
16f5b903 AG |
9070 | vmcs_load(shadow_vmcs); |
9071 | ||
f4160e45 JM |
9072 | for (q = 0; q < ARRAY_SIZE(fields); q++) { |
9073 | for (i = 0; i < max_fields[q]; i++) { | |
9074 | field = fields[q][i]; | |
9075 | field_value = __vmcs_readl(field); | |
e2536742 | 9076 | vmcs12_write_any(get_vmcs12(&vmx->vcpu), field, field_value); |
f4160e45 JM |
9077 | } |
9078 | /* | |
9079 | * Skip the VM-exit information fields if they are read-only. | |
9080 | */ | |
9081 | if (!nested_cpu_has_vmwrite_any_field(&vmx->vcpu)) | |
9082 | break; | |
16f5b903 AG |
9083 | } |
9084 | ||
9085 | vmcs_clear(shadow_vmcs); | |
9086 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
282da870 JK |
9087 | |
9088 | preempt_enable(); | |
16f5b903 AG |
9089 | } |
9090 | ||
c3114420 AG |
9091 | static void copy_vmcs12_to_shadow(struct vcpu_vmx *vmx) |
9092 | { | |
44900ba6 | 9093 | const u16 *fields[] = { |
c2bae893 MK |
9094 | shadow_read_write_fields, |
9095 | shadow_read_only_fields | |
c3114420 | 9096 | }; |
c2bae893 | 9097 | const int max_fields[] = { |
c3114420 AG |
9098 | max_shadow_read_write_fields, |
9099 | max_shadow_read_only_fields | |
9100 | }; | |
9101 | int i, q; | |
9102 | unsigned long field; | |
9103 | u64 field_value = 0; | |
355f4fb1 | 9104 | struct vmcs *shadow_vmcs = vmx->vmcs01.shadow_vmcs; |
c3114420 AG |
9105 | |
9106 | vmcs_load(shadow_vmcs); | |
9107 | ||
c2bae893 | 9108 | for (q = 0; q < ARRAY_SIZE(fields); q++) { |
c3114420 AG |
9109 | for (i = 0; i < max_fields[q]; i++) { |
9110 | field = fields[q][i]; | |
e2536742 | 9111 | vmcs12_read_any(get_vmcs12(&vmx->vcpu), field, &field_value); |
44900ba6 | 9112 | __vmcs_writel(field, field_value); |
c3114420 AG |
9113 | } |
9114 | } | |
9115 | ||
9116 | vmcs_clear(shadow_vmcs); | |
9117 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
9118 | } | |
9119 | ||
49f705c5 NHE |
9120 | static int handle_vmread(struct kvm_vcpu *vcpu) |
9121 | { | |
9122 | unsigned long field; | |
9123 | u64 field_value; | |
9124 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
9125 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
9126 | gva_t gva = 0; | |
6d894f49 | 9127 | struct vmcs12 *vmcs12; |
49f705c5 | 9128 | |
eb277562 | 9129 | if (!nested_vmx_check_permission(vcpu)) |
49f705c5 NHE |
9130 | return 1; |
9131 | ||
09abb5e3 SC |
9132 | if (to_vmx(vcpu)->nested.current_vmptr == -1ull) |
9133 | return nested_vmx_failInvalid(vcpu); | |
49f705c5 | 9134 | |
6d894f49 LA |
9135 | if (!is_guest_mode(vcpu)) |
9136 | vmcs12 = get_vmcs12(vcpu); | |
9137 | else { | |
9138 | /* | |
9139 | * When vmcs->vmcs_link_pointer is -1ull, any VMREAD | |
9140 | * to shadowed-field sets the ALU flags for VMfailInvalid. | |
9141 | */ | |
09abb5e3 SC |
9142 | if (get_vmcs12(vcpu)->vmcs_link_pointer == -1ull) |
9143 | return nested_vmx_failInvalid(vcpu); | |
6d894f49 LA |
9144 | vmcs12 = get_shadow_vmcs12(vcpu); |
9145 | } | |
9146 | ||
49f705c5 | 9147 | /* Decode instruction info and find the field to read */ |
27e6fb5d | 9148 | field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); |
49f705c5 | 9149 | /* Read the field, zero-extended to a u64 field_value */ |
09abb5e3 SC |
9150 | if (vmcs12_read_any(vmcs12, field, &field_value) < 0) |
9151 | return nested_vmx_failValid(vcpu, | |
9152 | VMXERR_UNSUPPORTED_VMCS_COMPONENT); | |
9153 | ||
49f705c5 NHE |
9154 | /* |
9155 | * Now copy part of this value to register or memory, as requested. | |
9156 | * Note that the number of bits actually copied is 32 or 64 depending | |
9157 | * on the guest's mode (32 or 64 bit), not on the given field's length. | |
9158 | */ | |
9159 | if (vmx_instruction_info & (1u << 10)) { | |
27e6fb5d | 9160 | kvm_register_writel(vcpu, (((vmx_instruction_info) >> 3) & 0xf), |
49f705c5 NHE |
9161 | field_value); |
9162 | } else { | |
9163 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
f9eb4af6 | 9164 | vmx_instruction_info, true, &gva)) |
49f705c5 | 9165 | return 1; |
727ba748 | 9166 | /* _system ok, nested_vmx_check_permission has verified cpl=0 */ |
ce14e868 PB |
9167 | kvm_write_guest_virt_system(vcpu, gva, &field_value, |
9168 | (is_long_mode(vcpu) ? 8 : 4), NULL); | |
49f705c5 NHE |
9169 | } |
9170 | ||
09abb5e3 | 9171 | return nested_vmx_succeed(vcpu); |
49f705c5 NHE |
9172 | } |
9173 | ||
9174 | ||
9175 | static int handle_vmwrite(struct kvm_vcpu *vcpu) | |
9176 | { | |
9177 | unsigned long field; | |
9178 | gva_t gva; | |
74a497fa | 9179 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
49f705c5 NHE |
9180 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
9181 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
74a497fa | 9182 | |
49f705c5 NHE |
9183 | /* The value to write might be 32 or 64 bits, depending on L1's long |
9184 | * mode, and eventually we need to write that into a field of several | |
9185 | * possible lengths. The code below first zero-extends the value to 64 | |
6a6256f9 | 9186 | * bit (field_value), and then copies only the appropriate number of |
49f705c5 NHE |
9187 | * bits into the vmcs12 field. |
9188 | */ | |
9189 | u64 field_value = 0; | |
9190 | struct x86_exception e; | |
6d894f49 | 9191 | struct vmcs12 *vmcs12; |
49f705c5 | 9192 | |
eb277562 | 9193 | if (!nested_vmx_check_permission(vcpu)) |
49f705c5 NHE |
9194 | return 1; |
9195 | ||
09abb5e3 SC |
9196 | if (vmx->nested.current_vmptr == -1ull) |
9197 | return nested_vmx_failInvalid(vcpu); | |
eb277562 | 9198 | |
49f705c5 | 9199 | if (vmx_instruction_info & (1u << 10)) |
27e6fb5d | 9200 | field_value = kvm_register_readl(vcpu, |
49f705c5 NHE |
9201 | (((vmx_instruction_info) >> 3) & 0xf)); |
9202 | else { | |
9203 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
f9eb4af6 | 9204 | vmx_instruction_info, false, &gva)) |
49f705c5 | 9205 | return 1; |
ce14e868 PB |
9206 | if (kvm_read_guest_virt(vcpu, gva, &field_value, |
9207 | (is_64_bit_mode(vcpu) ? 8 : 4), &e)) { | |
49f705c5 NHE |
9208 | kvm_inject_page_fault(vcpu, &e); |
9209 | return 1; | |
9210 | } | |
9211 | } | |
9212 | ||
9213 | ||
27e6fb5d | 9214 | field = kvm_register_readl(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); |
f4160e45 JM |
9215 | /* |
9216 | * If the vCPU supports "VMWRITE to any supported field in the | |
9217 | * VMCS," then the "read-only" fields are actually read/write. | |
9218 | */ | |
9219 | if (vmcs_field_readonly(field) && | |
09abb5e3 SC |
9220 | !nested_cpu_has_vmwrite_any_field(vcpu)) |
9221 | return nested_vmx_failValid(vcpu, | |
49f705c5 | 9222 | VMXERR_VMWRITE_READ_ONLY_VMCS_COMPONENT); |
49f705c5 | 9223 | |
6d894f49 LA |
9224 | if (!is_guest_mode(vcpu)) |
9225 | vmcs12 = get_vmcs12(vcpu); | |
9226 | else { | |
9227 | /* | |
9228 | * When vmcs->vmcs_link_pointer is -1ull, any VMWRITE | |
9229 | * to shadowed-field sets the ALU flags for VMfailInvalid. | |
9230 | */ | |
09abb5e3 SC |
9231 | if (get_vmcs12(vcpu)->vmcs_link_pointer == -1ull) |
9232 | return nested_vmx_failInvalid(vcpu); | |
6d894f49 | 9233 | vmcs12 = get_shadow_vmcs12(vcpu); |
6d894f49 LA |
9234 | } |
9235 | ||
09abb5e3 SC |
9236 | if (vmcs12_write_any(vmcs12, field, field_value) < 0) |
9237 | return nested_vmx_failValid(vcpu, | |
9238 | VMXERR_UNSUPPORTED_VMCS_COMPONENT); | |
49f705c5 | 9239 | |
6d894f49 LA |
9240 | /* |
9241 | * Do not track vmcs12 dirty-state if in guest-mode | |
9242 | * as we actually dirty shadow vmcs12 instead of vmcs12. | |
9243 | */ | |
9244 | if (!is_guest_mode(vcpu)) { | |
9245 | switch (field) { | |
74a497fa PB |
9246 | #define SHADOW_FIELD_RW(x) case x: |
9247 | #include "vmx_shadow_fields.h" | |
6d894f49 LA |
9248 | /* |
9249 | * The fields that can be updated by L1 without a vmexit are | |
9250 | * always updated in the vmcs02, the others go down the slow | |
9251 | * path of prepare_vmcs02. | |
9252 | */ | |
9253 | break; | |
9254 | default: | |
9255 | vmx->nested.dirty_vmcs12 = true; | |
9256 | break; | |
9257 | } | |
74a497fa PB |
9258 | } |
9259 | ||
09abb5e3 | 9260 | return nested_vmx_succeed(vcpu); |
49f705c5 NHE |
9261 | } |
9262 | ||
a8bc284e JM |
9263 | static void set_current_vmptr(struct vcpu_vmx *vmx, gpa_t vmptr) |
9264 | { | |
9265 | vmx->nested.current_vmptr = vmptr; | |
9266 | if (enable_shadow_vmcs) { | |
9267 | vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL, | |
9268 | SECONDARY_EXEC_SHADOW_VMCS); | |
9269 | vmcs_write64(VMCS_LINK_POINTER, | |
9270 | __pa(vmx->vmcs01.shadow_vmcs)); | |
945679e3 | 9271 | vmx->nested.need_vmcs12_sync = true; |
a8bc284e | 9272 | } |
74a497fa | 9273 | vmx->nested.dirty_vmcs12 = true; |
a8bc284e JM |
9274 | } |
9275 | ||
63846663 NHE |
9276 | /* Emulate the VMPTRLD instruction */ |
9277 | static int handle_vmptrld(struct kvm_vcpu *vcpu) | |
9278 | { | |
9279 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
63846663 | 9280 | gpa_t vmptr; |
63846663 NHE |
9281 | |
9282 | if (!nested_vmx_check_permission(vcpu)) | |
9283 | return 1; | |
9284 | ||
cbf71279 | 9285 | if (nested_vmx_get_vmptr(vcpu, &vmptr)) |
63846663 | 9286 | return 1; |
63846663 | 9287 | |
09abb5e3 SC |
9288 | if (!PAGE_ALIGNED(vmptr) || (vmptr >> cpuid_maxphyaddr(vcpu))) |
9289 | return nested_vmx_failValid(vcpu, | |
9290 | VMXERR_VMPTRLD_INVALID_ADDRESS); | |
cbf71279 | 9291 | |
09abb5e3 SC |
9292 | if (vmptr == vmx->nested.vmxon_ptr) |
9293 | return nested_vmx_failValid(vcpu, | |
9294 | VMXERR_VMPTRLD_VMXON_POINTER); | |
cbf71279 | 9295 | |
b8bbab92 VK |
9296 | /* Forbid normal VMPTRLD if Enlightened version was used */ |
9297 | if (vmx->nested.hv_evmcs) | |
9298 | return 1; | |
9299 | ||
63846663 NHE |
9300 | if (vmx->nested.current_vmptr != vmptr) { |
9301 | struct vmcs12 *new_vmcs12; | |
9302 | struct page *page; | |
5e2f30b7 | 9303 | page = kvm_vcpu_gpa_to_page(vcpu, vmptr); |
09abb5e3 SC |
9304 | if (is_error_page(page)) |
9305 | return nested_vmx_failInvalid(vcpu); | |
9306 | ||
63846663 | 9307 | new_vmcs12 = kmap(page); |
392b2f25 | 9308 | if (new_vmcs12->hdr.revision_id != VMCS12_REVISION || |
fa97d7db LA |
9309 | (new_vmcs12->hdr.shadow_vmcs && |
9310 | !nested_cpu_has_vmx_shadow_vmcs(vcpu))) { | |
63846663 | 9311 | kunmap(page); |
53a70daf | 9312 | kvm_release_page_clean(page); |
09abb5e3 | 9313 | return nested_vmx_failValid(vcpu, |
63846663 | 9314 | VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID); |
63846663 | 9315 | } |
63846663 | 9316 | |
14c07ad8 VK |
9317 | nested_release_vmcs12(vcpu); |
9318 | ||
4f2777bc DM |
9319 | /* |
9320 | * Load VMCS12 from guest memory since it is not already | |
9321 | * cached. | |
9322 | */ | |
9f744c59 PB |
9323 | memcpy(vmx->nested.cached_vmcs12, new_vmcs12, VMCS12_SIZE); |
9324 | kunmap(page); | |
53a70daf | 9325 | kvm_release_page_clean(page); |
9f744c59 | 9326 | |
a8bc284e | 9327 | set_current_vmptr(vmx, vmptr); |
63846663 NHE |
9328 | } |
9329 | ||
09abb5e3 | 9330 | return nested_vmx_succeed(vcpu); |
63846663 NHE |
9331 | } |
9332 | ||
b8bbab92 VK |
9333 | /* |
9334 | * This is an equivalent of the nested hypervisor executing the vmptrld | |
9335 | * instruction. | |
9336 | */ | |
8cab6507 VK |
9337 | static int nested_vmx_handle_enlightened_vmptrld(struct kvm_vcpu *vcpu, |
9338 | bool from_launch) | |
b8bbab92 VK |
9339 | { |
9340 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
9341 | struct hv_vp_assist_page assist_page; | |
9342 | ||
9343 | if (likely(!vmx->nested.enlightened_vmcs_enabled)) | |
9344 | return 1; | |
9345 | ||
9346 | if (unlikely(!kvm_hv_get_assist_page(vcpu, &assist_page))) | |
9347 | return 1; | |
9348 | ||
9349 | if (unlikely(!assist_page.enlighten_vmentry)) | |
9350 | return 1; | |
9351 | ||
9352 | if (unlikely(assist_page.current_nested_vmcs != | |
9353 | vmx->nested.hv_evmcs_vmptr)) { | |
9354 | ||
9355 | if (!vmx->nested.hv_evmcs) | |
9356 | vmx->nested.current_vmptr = -1ull; | |
9357 | ||
9358 | nested_release_evmcs(vcpu); | |
9359 | ||
9360 | vmx->nested.hv_evmcs_page = kvm_vcpu_gpa_to_page( | |
9361 | vcpu, assist_page.current_nested_vmcs); | |
9362 | ||
9363 | if (unlikely(is_error_page(vmx->nested.hv_evmcs_page))) | |
9364 | return 0; | |
9365 | ||
9366 | vmx->nested.hv_evmcs = kmap(vmx->nested.hv_evmcs_page); | |
9367 | ||
9368 | if (vmx->nested.hv_evmcs->revision_id != VMCS12_REVISION) { | |
9369 | nested_release_evmcs(vcpu); | |
9370 | return 0; | |
9371 | } | |
9372 | ||
9373 | vmx->nested.dirty_vmcs12 = true; | |
9374 | /* | |
9375 | * As we keep L2 state for one guest only 'hv_clean_fields' mask | |
9376 | * can't be used when we switch between them. Reset it here for | |
9377 | * simplicity. | |
9378 | */ | |
9379 | vmx->nested.hv_evmcs->hv_clean_fields &= | |
9380 | ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL; | |
9381 | vmx->nested.hv_evmcs_vmptr = assist_page.current_nested_vmcs; | |
9382 | ||
9383 | /* | |
9384 | * Unlike normal vmcs12, enlightened vmcs12 is not fully | |
9385 | * reloaded from guest's memory (read only fields, fields not | |
9386 | * present in struct hv_enlightened_vmcs, ...). Make sure there | |
9387 | * are no leftovers. | |
9388 | */ | |
8cab6507 VK |
9389 | if (from_launch) |
9390 | memset(vmx->nested.cached_vmcs12, 0, | |
9391 | sizeof(*vmx->nested.cached_vmcs12)); | |
b8bbab92 VK |
9392 | |
9393 | } | |
9394 | return 1; | |
9395 | } | |
9396 | ||
6a4d7550 NHE |
9397 | /* Emulate the VMPTRST instruction */ |
9398 | static int handle_vmptrst(struct kvm_vcpu *vcpu) | |
9399 | { | |
0a06d425 SC |
9400 | unsigned long exit_qual = vmcs_readl(EXIT_QUALIFICATION); |
9401 | u32 instr_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
9402 | gpa_t current_vmptr = to_vmx(vcpu)->nested.current_vmptr; | |
6a4d7550 | 9403 | struct x86_exception e; |
0a06d425 | 9404 | gva_t gva; |
6a4d7550 NHE |
9405 | |
9406 | if (!nested_vmx_check_permission(vcpu)) | |
9407 | return 1; | |
9408 | ||
b8bbab92 VK |
9409 | if (unlikely(to_vmx(vcpu)->nested.hv_evmcs)) |
9410 | return 1; | |
9411 | ||
0a06d425 | 9412 | if (get_vmx_mem_address(vcpu, exit_qual, instr_info, true, &gva)) |
6a4d7550 | 9413 | return 1; |
727ba748 | 9414 | /* *_system ok, nested_vmx_check_permission has verified cpl=0 */ |
0a06d425 SC |
9415 | if (kvm_write_guest_virt_system(vcpu, gva, (void *)¤t_vmptr, |
9416 | sizeof(gpa_t), &e)) { | |
6a4d7550 NHE |
9417 | kvm_inject_page_fault(vcpu, &e); |
9418 | return 1; | |
9419 | } | |
09abb5e3 | 9420 | return nested_vmx_succeed(vcpu); |
6a4d7550 NHE |
9421 | } |
9422 | ||
bfd0a56b NHE |
9423 | /* Emulate the INVEPT instruction */ |
9424 | static int handle_invept(struct kvm_vcpu *vcpu) | |
9425 | { | |
b9c237bb | 9426 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
bfd0a56b NHE |
9427 | u32 vmx_instruction_info, types; |
9428 | unsigned long type; | |
9429 | gva_t gva; | |
9430 | struct x86_exception e; | |
9431 | struct { | |
9432 | u64 eptp, gpa; | |
9433 | } operand; | |
bfd0a56b | 9434 | |
6677f3da | 9435 | if (!(vmx->nested.msrs.secondary_ctls_high & |
b9c237bb | 9436 | SECONDARY_EXEC_ENABLE_EPT) || |
6677f3da | 9437 | !(vmx->nested.msrs.ept_caps & VMX_EPT_INVEPT_BIT)) { |
bfd0a56b NHE |
9438 | kvm_queue_exception(vcpu, UD_VECTOR); |
9439 | return 1; | |
9440 | } | |
9441 | ||
9442 | if (!nested_vmx_check_permission(vcpu)) | |
9443 | return 1; | |
9444 | ||
bfd0a56b | 9445 | vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); |
27e6fb5d | 9446 | type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf); |
bfd0a56b | 9447 | |
6677f3da | 9448 | types = (vmx->nested.msrs.ept_caps >> VMX_EPT_EXTENT_SHIFT) & 6; |
bfd0a56b | 9449 | |
09abb5e3 SC |
9450 | if (type >= 32 || !(types & (1 << type))) |
9451 | return nested_vmx_failValid(vcpu, | |
bfd0a56b | 9452 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); |
bfd0a56b NHE |
9453 | |
9454 | /* According to the Intel VMX instruction reference, the memory | |
9455 | * operand is read even if it isn't needed (e.g., for type==global) | |
9456 | */ | |
9457 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
f9eb4af6 | 9458 | vmx_instruction_info, false, &gva)) |
bfd0a56b | 9459 | return 1; |
ce14e868 | 9460 | if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) { |
bfd0a56b NHE |
9461 | kvm_inject_page_fault(vcpu, &e); |
9462 | return 1; | |
9463 | } | |
9464 | ||
9465 | switch (type) { | |
bfd0a56b | 9466 | case VMX_EPT_EXTENT_GLOBAL: |
45e11817 BD |
9467 | /* |
9468 | * TODO: track mappings and invalidate | |
9469 | * single context requests appropriately | |
9470 | */ | |
9471 | case VMX_EPT_EXTENT_CONTEXT: | |
bfd0a56b | 9472 | kvm_mmu_sync_roots(vcpu); |
77c3913b | 9473 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
bfd0a56b NHE |
9474 | break; |
9475 | default: | |
9476 | BUG_ON(1); | |
9477 | break; | |
9478 | } | |
9479 | ||
09abb5e3 | 9480 | return nested_vmx_succeed(vcpu); |
bfd0a56b NHE |
9481 | } |
9482 | ||
3d5bdae8 LA |
9483 | static u16 nested_get_vpid02(struct kvm_vcpu *vcpu) |
9484 | { | |
9485 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
9486 | ||
9487 | return vmx->nested.vpid02 ? vmx->nested.vpid02 : vmx->vpid; | |
9488 | } | |
9489 | ||
a642fc30 PM |
9490 | static int handle_invvpid(struct kvm_vcpu *vcpu) |
9491 | { | |
99b83ac8 WL |
9492 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
9493 | u32 vmx_instruction_info; | |
9494 | unsigned long type, types; | |
9495 | gva_t gva; | |
9496 | struct x86_exception e; | |
40352605 JM |
9497 | struct { |
9498 | u64 vpid; | |
9499 | u64 gla; | |
9500 | } operand; | |
3d5bdae8 | 9501 | u16 vpid02; |
99b83ac8 | 9502 | |
6677f3da | 9503 | if (!(vmx->nested.msrs.secondary_ctls_high & |
99b83ac8 | 9504 | SECONDARY_EXEC_ENABLE_VPID) || |
6677f3da | 9505 | !(vmx->nested.msrs.vpid_caps & VMX_VPID_INVVPID_BIT)) { |
99b83ac8 WL |
9506 | kvm_queue_exception(vcpu, UD_VECTOR); |
9507 | return 1; | |
9508 | } | |
9509 | ||
9510 | if (!nested_vmx_check_permission(vcpu)) | |
9511 | return 1; | |
9512 | ||
9513 | vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
9514 | type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf); | |
9515 | ||
6677f3da | 9516 | types = (vmx->nested.msrs.vpid_caps & |
bcdde302 | 9517 | VMX_VPID_EXTENT_SUPPORTED_MASK) >> 8; |
99b83ac8 | 9518 | |
09abb5e3 SC |
9519 | if (type >= 32 || !(types & (1 << type))) |
9520 | return nested_vmx_failValid(vcpu, | |
99b83ac8 | 9521 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); |
99b83ac8 WL |
9522 | |
9523 | /* according to the intel vmx instruction reference, the memory | |
9524 | * operand is read even if it isn't needed (e.g., for type==global) | |
9525 | */ | |
9526 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
9527 | vmx_instruction_info, false, &gva)) | |
9528 | return 1; | |
ce14e868 | 9529 | if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) { |
99b83ac8 WL |
9530 | kvm_inject_page_fault(vcpu, &e); |
9531 | return 1; | |
9532 | } | |
09abb5e3 SC |
9533 | if (operand.vpid >> 16) |
9534 | return nested_vmx_failValid(vcpu, | |
40352605 | 9535 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); |
99b83ac8 | 9536 | |
3d5bdae8 | 9537 | vpid02 = nested_get_vpid02(vcpu); |
99b83ac8 | 9538 | switch (type) { |
bcdde302 | 9539 | case VMX_VPID_EXTENT_INDIVIDUAL_ADDR: |
cd9a491f | 9540 | if (!operand.vpid || |
09abb5e3 SC |
9541 | is_noncanonical_address(operand.gla, vcpu)) |
9542 | return nested_vmx_failValid(vcpu, | |
40352605 | 9543 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); |
3d5bdae8 | 9544 | if (cpu_has_vmx_invvpid_individual_addr()) { |
cd9a491f | 9545 | __invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR, |
3d5bdae8 | 9546 | vpid02, operand.gla); |
cd9a491f | 9547 | } else |
327c0721 | 9548 | __vmx_flush_tlb(vcpu, vpid02, false); |
cd9a491f | 9549 | break; |
ef697a71 | 9550 | case VMX_VPID_EXTENT_SINGLE_CONTEXT: |
bcdde302 | 9551 | case VMX_VPID_EXTENT_SINGLE_NON_GLOBAL: |
09abb5e3 SC |
9552 | if (!operand.vpid) |
9553 | return nested_vmx_failValid(vcpu, | |
bcdde302 | 9554 | VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID); |
327c0721 | 9555 | __vmx_flush_tlb(vcpu, vpid02, false); |
bcdde302 | 9556 | break; |
99b83ac8 | 9557 | case VMX_VPID_EXTENT_ALL_CONTEXT: |
327c0721 | 9558 | __vmx_flush_tlb(vcpu, vpid02, false); |
99b83ac8 WL |
9559 | break; |
9560 | default: | |
bcdde302 | 9561 | WARN_ON_ONCE(1); |
6affcbed | 9562 | return kvm_skip_emulated_instruction(vcpu); |
99b83ac8 WL |
9563 | } |
9564 | ||
09abb5e3 | 9565 | return nested_vmx_succeed(vcpu); |
a642fc30 PM |
9566 | } |
9567 | ||
eb4b248e JS |
9568 | static int handle_invpcid(struct kvm_vcpu *vcpu) |
9569 | { | |
9570 | u32 vmx_instruction_info; | |
9571 | unsigned long type; | |
9572 | bool pcid_enabled; | |
9573 | gva_t gva; | |
9574 | struct x86_exception e; | |
b94742c9 JS |
9575 | unsigned i; |
9576 | unsigned long roots_to_free = 0; | |
eb4b248e JS |
9577 | struct { |
9578 | u64 pcid; | |
9579 | u64 gla; | |
9580 | } operand; | |
9581 | ||
9582 | if (!guest_cpuid_has(vcpu, X86_FEATURE_INVPCID)) { | |
9583 | kvm_queue_exception(vcpu, UD_VECTOR); | |
9584 | return 1; | |
9585 | } | |
9586 | ||
9587 | vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
9588 | type = kvm_register_readl(vcpu, (vmx_instruction_info >> 28) & 0xf); | |
9589 | ||
9590 | if (type > 3) { | |
9591 | kvm_inject_gp(vcpu, 0); | |
9592 | return 1; | |
9593 | } | |
9594 | ||
9595 | /* According to the Intel instruction reference, the memory operand | |
9596 | * is read even if it isn't needed (e.g., for type==all) | |
9597 | */ | |
9598 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
9599 | vmx_instruction_info, false, &gva)) | |
9600 | return 1; | |
9601 | ||
9602 | if (kvm_read_guest_virt(vcpu, gva, &operand, sizeof(operand), &e)) { | |
9603 | kvm_inject_page_fault(vcpu, &e); | |
9604 | return 1; | |
9605 | } | |
9606 | ||
9607 | if (operand.pcid >> 12 != 0) { | |
9608 | kvm_inject_gp(vcpu, 0); | |
9609 | return 1; | |
9610 | } | |
9611 | ||
9612 | pcid_enabled = kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE); | |
9613 | ||
9614 | switch (type) { | |
9615 | case INVPCID_TYPE_INDIV_ADDR: | |
9616 | if ((!pcid_enabled && (operand.pcid != 0)) || | |
9617 | is_noncanonical_address(operand.gla, vcpu)) { | |
9618 | kvm_inject_gp(vcpu, 0); | |
9619 | return 1; | |
9620 | } | |
9621 | kvm_mmu_invpcid_gva(vcpu, operand.gla, operand.pcid); | |
9622 | return kvm_skip_emulated_instruction(vcpu); | |
9623 | ||
9624 | case INVPCID_TYPE_SINGLE_CTXT: | |
9625 | if (!pcid_enabled && (operand.pcid != 0)) { | |
9626 | kvm_inject_gp(vcpu, 0); | |
9627 | return 1; | |
9628 | } | |
9629 | ||
9630 | if (kvm_get_active_pcid(vcpu) == operand.pcid) { | |
9631 | kvm_mmu_sync_roots(vcpu); | |
9632 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
9633 | } | |
9634 | ||
b94742c9 | 9635 | for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++) |
44dd3ffa | 9636 | if (kvm_get_pcid(vcpu, vcpu->arch.mmu->prev_roots[i].cr3) |
b94742c9 JS |
9637 | == operand.pcid) |
9638 | roots_to_free |= KVM_MMU_ROOT_PREVIOUS(i); | |
ade61e28 | 9639 | |
6a82cd1c | 9640 | kvm_mmu_free_roots(vcpu, vcpu->arch.mmu, roots_to_free); |
eb4b248e | 9641 | /* |
b94742c9 | 9642 | * If neither the current cr3 nor any of the prev_roots use the |
ade61e28 JS |
9643 | * given PCID, then nothing needs to be done here because a |
9644 | * resync will happen anyway before switching to any other CR3. | |
eb4b248e JS |
9645 | */ |
9646 | ||
9647 | return kvm_skip_emulated_instruction(vcpu); | |
9648 | ||
9649 | case INVPCID_TYPE_ALL_NON_GLOBAL: | |
9650 | /* | |
9651 | * Currently, KVM doesn't mark global entries in the shadow | |
9652 | * page tables, so a non-global flush just degenerates to a | |
9653 | * global flush. If needed, we could optimize this later by | |
9654 | * keeping track of global entries in shadow page tables. | |
9655 | */ | |
9656 | ||
9657 | /* fall-through */ | |
9658 | case INVPCID_TYPE_ALL_INCL_GLOBAL: | |
9659 | kvm_mmu_unload(vcpu); | |
9660 | return kvm_skip_emulated_instruction(vcpu); | |
9661 | ||
9662 | default: | |
9663 | BUG(); /* We have already checked above that type <= 3 */ | |
9664 | } | |
9665 | } | |
9666 | ||
843e4330 KH |
9667 | static int handle_pml_full(struct kvm_vcpu *vcpu) |
9668 | { | |
9669 | unsigned long exit_qualification; | |
9670 | ||
9671 | trace_kvm_pml_full(vcpu->vcpu_id); | |
9672 | ||
9673 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
9674 | ||
9675 | /* | |
9676 | * PML buffer FULL happened while executing iret from NMI, | |
9677 | * "blocked by NMI" bit has to be set before next VM entry. | |
9678 | */ | |
9679 | if (!(to_vmx(vcpu)->idt_vectoring_info & VECTORING_INFO_VALID_MASK) && | |
d02fcf50 | 9680 | enable_vnmi && |
843e4330 KH |
9681 | (exit_qualification & INTR_INFO_UNBLOCK_NMI)) |
9682 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
9683 | GUEST_INTR_STATE_NMI); | |
9684 | ||
9685 | /* | |
9686 | * PML buffer already flushed at beginning of VMEXIT. Nothing to do | |
9687 | * here.., and there's no userspace involvement needed for PML. | |
9688 | */ | |
9689 | return 1; | |
9690 | } | |
9691 | ||
64672c95 YJ |
9692 | static int handle_preemption_timer(struct kvm_vcpu *vcpu) |
9693 | { | |
d264ee0c SC |
9694 | if (!to_vmx(vcpu)->req_immediate_exit) |
9695 | kvm_lapic_expired_hv_timer(vcpu); | |
64672c95 YJ |
9696 | return 1; |
9697 | } | |
9698 | ||
41ab9372 BD |
9699 | static bool valid_ept_address(struct kvm_vcpu *vcpu, u64 address) |
9700 | { | |
9701 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
41ab9372 BD |
9702 | int maxphyaddr = cpuid_maxphyaddr(vcpu); |
9703 | ||
9704 | /* Check for memory type validity */ | |
bb97a016 DH |
9705 | switch (address & VMX_EPTP_MT_MASK) { |
9706 | case VMX_EPTP_MT_UC: | |
6677f3da | 9707 | if (!(vmx->nested.msrs.ept_caps & VMX_EPTP_UC_BIT)) |
41ab9372 BD |
9708 | return false; |
9709 | break; | |
bb97a016 | 9710 | case VMX_EPTP_MT_WB: |
6677f3da | 9711 | if (!(vmx->nested.msrs.ept_caps & VMX_EPTP_WB_BIT)) |
41ab9372 BD |
9712 | return false; |
9713 | break; | |
9714 | default: | |
9715 | return false; | |
9716 | } | |
9717 | ||
bb97a016 DH |
9718 | /* only 4 levels page-walk length are valid */ |
9719 | if ((address & VMX_EPTP_PWL_MASK) != VMX_EPTP_PWL_4) | |
41ab9372 BD |
9720 | return false; |
9721 | ||
9722 | /* Reserved bits should not be set */ | |
9723 | if (address >> maxphyaddr || ((address >> 7) & 0x1f)) | |
9724 | return false; | |
9725 | ||
9726 | /* AD, if set, should be supported */ | |
bb97a016 | 9727 | if (address & VMX_EPTP_AD_ENABLE_BIT) { |
6677f3da | 9728 | if (!(vmx->nested.msrs.ept_caps & VMX_EPT_AD_BIT)) |
41ab9372 BD |
9729 | return false; |
9730 | } | |
9731 | ||
9732 | return true; | |
9733 | } | |
9734 | ||
9735 | static int nested_vmx_eptp_switching(struct kvm_vcpu *vcpu, | |
9736 | struct vmcs12 *vmcs12) | |
9737 | { | |
9738 | u32 index = vcpu->arch.regs[VCPU_REGS_RCX]; | |
9739 | u64 address; | |
9740 | bool accessed_dirty; | |
9741 | struct kvm_mmu *mmu = vcpu->arch.walk_mmu; | |
9742 | ||
9743 | if (!nested_cpu_has_eptp_switching(vmcs12) || | |
9744 | !nested_cpu_has_ept(vmcs12)) | |
9745 | return 1; | |
9746 | ||
9747 | if (index >= VMFUNC_EPTP_ENTRIES) | |
9748 | return 1; | |
9749 | ||
9750 | ||
9751 | if (kvm_vcpu_read_guest_page(vcpu, vmcs12->eptp_list_address >> PAGE_SHIFT, | |
9752 | &address, index * 8, 8)) | |
9753 | return 1; | |
9754 | ||
bb97a016 | 9755 | accessed_dirty = !!(address & VMX_EPTP_AD_ENABLE_BIT); |
41ab9372 BD |
9756 | |
9757 | /* | |
9758 | * If the (L2) guest does a vmfunc to the currently | |
9759 | * active ept pointer, we don't have to do anything else | |
9760 | */ | |
9761 | if (vmcs12->ept_pointer != address) { | |
9762 | if (!valid_ept_address(vcpu, address)) | |
9763 | return 1; | |
9764 | ||
9765 | kvm_mmu_unload(vcpu); | |
9766 | mmu->ept_ad = accessed_dirty; | |
36d9594d | 9767 | mmu->mmu_role.base.ad_disabled = !accessed_dirty; |
41ab9372 BD |
9768 | vmcs12->ept_pointer = address; |
9769 | /* | |
9770 | * TODO: Check what's the correct approach in case | |
9771 | * mmu reload fails. Currently, we just let the next | |
9772 | * reload potentially fail | |
9773 | */ | |
9774 | kvm_mmu_reload(vcpu); | |
9775 | } | |
9776 | ||
9777 | return 0; | |
9778 | } | |
9779 | ||
2a499e49 BD |
9780 | static int handle_vmfunc(struct kvm_vcpu *vcpu) |
9781 | { | |
27c42a1b BD |
9782 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
9783 | struct vmcs12 *vmcs12; | |
9784 | u32 function = vcpu->arch.regs[VCPU_REGS_RAX]; | |
9785 | ||
9786 | /* | |
9787 | * VMFUNC is only supported for nested guests, but we always enable the | |
9788 | * secondary control for simplicity; for non-nested mode, fake that we | |
9789 | * didn't by injecting #UD. | |
9790 | */ | |
9791 | if (!is_guest_mode(vcpu)) { | |
9792 | kvm_queue_exception(vcpu, UD_VECTOR); | |
9793 | return 1; | |
9794 | } | |
9795 | ||
9796 | vmcs12 = get_vmcs12(vcpu); | |
9797 | if ((vmcs12->vm_function_control & (1 << function)) == 0) | |
9798 | goto fail; | |
41ab9372 BD |
9799 | |
9800 | switch (function) { | |
9801 | case 0: | |
9802 | if (nested_vmx_eptp_switching(vcpu, vmcs12)) | |
9803 | goto fail; | |
9804 | break; | |
9805 | default: | |
9806 | goto fail; | |
9807 | } | |
9808 | return kvm_skip_emulated_instruction(vcpu); | |
27c42a1b BD |
9809 | |
9810 | fail: | |
9811 | nested_vmx_vmexit(vcpu, vmx->exit_reason, | |
9812 | vmcs_read32(VM_EXIT_INTR_INFO), | |
9813 | vmcs_readl(EXIT_QUALIFICATION)); | |
2a499e49 BD |
9814 | return 1; |
9815 | } | |
9816 | ||
0b665d30 SC |
9817 | static int handle_encls(struct kvm_vcpu *vcpu) |
9818 | { | |
9819 | /* | |
9820 | * SGX virtualization is not yet supported. There is no software | |
9821 | * enable bit for SGX, so we have to trap ENCLS and inject a #UD | |
9822 | * to prevent the guest from executing ENCLS. | |
9823 | */ | |
9824 | kvm_queue_exception(vcpu, UD_VECTOR); | |
9825 | return 1; | |
9826 | } | |
9827 | ||
6aa8b732 AK |
9828 | /* |
9829 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
9830 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
9831 | * to be done to userspace and return 0. | |
9832 | */ | |
772e0318 | 9833 | static int (*const kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
9834 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
9835 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 9836 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 9837 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 9838 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
9839 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
9840 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
9841 | [EXIT_REASON_CPUID] = handle_cpuid, | |
9842 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
9843 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
9844 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
9845 | [EXIT_REASON_HLT] = handle_halt, | |
ec25d5e6 | 9846 | [EXIT_REASON_INVD] = handle_invd, |
a7052897 | 9847 | [EXIT_REASON_INVLPG] = handle_invlpg, |
fee84b07 | 9848 | [EXIT_REASON_RDPMC] = handle_rdpmc, |
c21415e8 | 9849 | [EXIT_REASON_VMCALL] = handle_vmcall, |
27d6c865 | 9850 | [EXIT_REASON_VMCLEAR] = handle_vmclear, |
cd232ad0 | 9851 | [EXIT_REASON_VMLAUNCH] = handle_vmlaunch, |
63846663 | 9852 | [EXIT_REASON_VMPTRLD] = handle_vmptrld, |
6a4d7550 | 9853 | [EXIT_REASON_VMPTRST] = handle_vmptrst, |
49f705c5 | 9854 | [EXIT_REASON_VMREAD] = handle_vmread, |
cd232ad0 | 9855 | [EXIT_REASON_VMRESUME] = handle_vmresume, |
49f705c5 | 9856 | [EXIT_REASON_VMWRITE] = handle_vmwrite, |
ec378aee NHE |
9857 | [EXIT_REASON_VMOFF] = handle_vmoff, |
9858 | [EXIT_REASON_VMON] = handle_vmon, | |
f78e0e2e SY |
9859 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
9860 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
83d4c286 | 9861 | [EXIT_REASON_APIC_WRITE] = handle_apic_write, |
c7c9c56c | 9862 | [EXIT_REASON_EOI_INDUCED] = handle_apic_eoi_induced, |
e5edaa01 | 9863 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
2acf923e | 9864 | [EXIT_REASON_XSETBV] = handle_xsetbv, |
37817f29 | 9865 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 9866 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
0367f205 PB |
9867 | [EXIT_REASON_GDTR_IDTR] = handle_desc, |
9868 | [EXIT_REASON_LDTR_TR] = handle_desc, | |
68f89400 MT |
9869 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
9870 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 9871 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
87c00572 | 9872 | [EXIT_REASON_MWAIT_INSTRUCTION] = handle_mwait, |
5f3d45e7 | 9873 | [EXIT_REASON_MONITOR_TRAP_FLAG] = handle_monitor_trap, |
87c00572 | 9874 | [EXIT_REASON_MONITOR_INSTRUCTION] = handle_monitor, |
bfd0a56b | 9875 | [EXIT_REASON_INVEPT] = handle_invept, |
a642fc30 | 9876 | [EXIT_REASON_INVVPID] = handle_invvpid, |
45ec368c | 9877 | [EXIT_REASON_RDRAND] = handle_invalid_op, |
75f4fc8d | 9878 | [EXIT_REASON_RDSEED] = handle_invalid_op, |
f53cd63c WL |
9879 | [EXIT_REASON_XSAVES] = handle_xsaves, |
9880 | [EXIT_REASON_XRSTORS] = handle_xrstors, | |
843e4330 | 9881 | [EXIT_REASON_PML_FULL] = handle_pml_full, |
eb4b248e | 9882 | [EXIT_REASON_INVPCID] = handle_invpcid, |
2a499e49 | 9883 | [EXIT_REASON_VMFUNC] = handle_vmfunc, |
64672c95 | 9884 | [EXIT_REASON_PREEMPTION_TIMER] = handle_preemption_timer, |
0b665d30 | 9885 | [EXIT_REASON_ENCLS] = handle_encls, |
6aa8b732 AK |
9886 | }; |
9887 | ||
9888 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 9889 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 | 9890 | |
908a7bdd JK |
9891 | static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu, |
9892 | struct vmcs12 *vmcs12) | |
9893 | { | |
9894 | unsigned long exit_qualification; | |
9895 | gpa_t bitmap, last_bitmap; | |
9896 | unsigned int port; | |
9897 | int size; | |
9898 | u8 b; | |
9899 | ||
908a7bdd | 9900 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) |
2f0a6397 | 9901 | return nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING); |
908a7bdd JK |
9902 | |
9903 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
9904 | ||
9905 | port = exit_qualification >> 16; | |
9906 | size = (exit_qualification & 7) + 1; | |
9907 | ||
9908 | last_bitmap = (gpa_t)-1; | |
9909 | b = -1; | |
9910 | ||
9911 | while (size > 0) { | |
9912 | if (port < 0x8000) | |
9913 | bitmap = vmcs12->io_bitmap_a; | |
9914 | else if (port < 0x10000) | |
9915 | bitmap = vmcs12->io_bitmap_b; | |
9916 | else | |
1d804d07 | 9917 | return true; |
908a7bdd JK |
9918 | bitmap += (port & 0x7fff) / 8; |
9919 | ||
9920 | if (last_bitmap != bitmap) | |
54bf36aa | 9921 | if (kvm_vcpu_read_guest(vcpu, bitmap, &b, 1)) |
1d804d07 | 9922 | return true; |
908a7bdd | 9923 | if (b & (1 << (port & 7))) |
1d804d07 | 9924 | return true; |
908a7bdd JK |
9925 | |
9926 | port++; | |
9927 | size--; | |
9928 | last_bitmap = bitmap; | |
9929 | } | |
9930 | ||
1d804d07 | 9931 | return false; |
908a7bdd JK |
9932 | } |
9933 | ||
644d711a NHE |
9934 | /* |
9935 | * Return 1 if we should exit from L2 to L1 to handle an MSR access access, | |
9936 | * rather than handle it ourselves in L0. I.e., check whether L1 expressed | |
9937 | * disinterest in the current event (read or write a specific MSR) by using an | |
9938 | * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps. | |
9939 | */ | |
9940 | static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu, | |
9941 | struct vmcs12 *vmcs12, u32 exit_reason) | |
9942 | { | |
9943 | u32 msr_index = vcpu->arch.regs[VCPU_REGS_RCX]; | |
9944 | gpa_t bitmap; | |
9945 | ||
cbd29cb6 | 9946 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS)) |
1d804d07 | 9947 | return true; |
644d711a NHE |
9948 | |
9949 | /* | |
9950 | * The MSR_BITMAP page is divided into four 1024-byte bitmaps, | |
9951 | * for the four combinations of read/write and low/high MSR numbers. | |
9952 | * First we need to figure out which of the four to use: | |
9953 | */ | |
9954 | bitmap = vmcs12->msr_bitmap; | |
9955 | if (exit_reason == EXIT_REASON_MSR_WRITE) | |
9956 | bitmap += 2048; | |
9957 | if (msr_index >= 0xc0000000) { | |
9958 | msr_index -= 0xc0000000; | |
9959 | bitmap += 1024; | |
9960 | } | |
9961 | ||
9962 | /* Then read the msr_index'th bit from this bitmap: */ | |
9963 | if (msr_index < 1024*8) { | |
9964 | unsigned char b; | |
54bf36aa | 9965 | if (kvm_vcpu_read_guest(vcpu, bitmap + msr_index/8, &b, 1)) |
1d804d07 | 9966 | return true; |
644d711a NHE |
9967 | return 1 & (b >> (msr_index & 7)); |
9968 | } else | |
1d804d07 | 9969 | return true; /* let L1 handle the wrong parameter */ |
644d711a NHE |
9970 | } |
9971 | ||
9972 | /* | |
9973 | * Return 1 if we should exit from L2 to L1 to handle a CR access exit, | |
9974 | * rather than handle it ourselves in L0. I.e., check if L1 wanted to | |
9975 | * intercept (via guest_host_mask etc.) the current event. | |
9976 | */ | |
9977 | static bool nested_vmx_exit_handled_cr(struct kvm_vcpu *vcpu, | |
9978 | struct vmcs12 *vmcs12) | |
9979 | { | |
9980 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
9981 | int cr = exit_qualification & 15; | |
e1d39b17 JS |
9982 | int reg; |
9983 | unsigned long val; | |
644d711a NHE |
9984 | |
9985 | switch ((exit_qualification >> 4) & 3) { | |
9986 | case 0: /* mov to cr */ | |
e1d39b17 JS |
9987 | reg = (exit_qualification >> 8) & 15; |
9988 | val = kvm_register_readl(vcpu, reg); | |
644d711a NHE |
9989 | switch (cr) { |
9990 | case 0: | |
9991 | if (vmcs12->cr0_guest_host_mask & | |
9992 | (val ^ vmcs12->cr0_read_shadow)) | |
1d804d07 | 9993 | return true; |
644d711a NHE |
9994 | break; |
9995 | case 3: | |
9996 | if ((vmcs12->cr3_target_count >= 1 && | |
9997 | vmcs12->cr3_target_value0 == val) || | |
9998 | (vmcs12->cr3_target_count >= 2 && | |
9999 | vmcs12->cr3_target_value1 == val) || | |
10000 | (vmcs12->cr3_target_count >= 3 && | |
10001 | vmcs12->cr3_target_value2 == val) || | |
10002 | (vmcs12->cr3_target_count >= 4 && | |
10003 | vmcs12->cr3_target_value3 == val)) | |
1d804d07 | 10004 | return false; |
644d711a | 10005 | if (nested_cpu_has(vmcs12, CPU_BASED_CR3_LOAD_EXITING)) |
1d804d07 | 10006 | return true; |
644d711a NHE |
10007 | break; |
10008 | case 4: | |
10009 | if (vmcs12->cr4_guest_host_mask & | |
10010 | (vmcs12->cr4_read_shadow ^ val)) | |
1d804d07 | 10011 | return true; |
644d711a NHE |
10012 | break; |
10013 | case 8: | |
10014 | if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING)) | |
1d804d07 | 10015 | return true; |
644d711a NHE |
10016 | break; |
10017 | } | |
10018 | break; | |
10019 | case 2: /* clts */ | |
10020 | if ((vmcs12->cr0_guest_host_mask & X86_CR0_TS) && | |
10021 | (vmcs12->cr0_read_shadow & X86_CR0_TS)) | |
1d804d07 | 10022 | return true; |
644d711a NHE |
10023 | break; |
10024 | case 1: /* mov from cr */ | |
10025 | switch (cr) { | |
10026 | case 3: | |
10027 | if (vmcs12->cpu_based_vm_exec_control & | |
10028 | CPU_BASED_CR3_STORE_EXITING) | |
1d804d07 | 10029 | return true; |
644d711a NHE |
10030 | break; |
10031 | case 8: | |
10032 | if (vmcs12->cpu_based_vm_exec_control & | |
10033 | CPU_BASED_CR8_STORE_EXITING) | |
1d804d07 | 10034 | return true; |
644d711a NHE |
10035 | break; |
10036 | } | |
10037 | break; | |
10038 | case 3: /* lmsw */ | |
10039 | /* | |
10040 | * lmsw can change bits 1..3 of cr0, and only set bit 0 of | |
10041 | * cr0. Other attempted changes are ignored, with no exit. | |
10042 | */ | |
e1d39b17 | 10043 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
644d711a NHE |
10044 | if (vmcs12->cr0_guest_host_mask & 0xe & |
10045 | (val ^ vmcs12->cr0_read_shadow)) | |
1d804d07 | 10046 | return true; |
644d711a NHE |
10047 | if ((vmcs12->cr0_guest_host_mask & 0x1) && |
10048 | !(vmcs12->cr0_read_shadow & 0x1) && | |
10049 | (val & 0x1)) | |
1d804d07 | 10050 | return true; |
644d711a NHE |
10051 | break; |
10052 | } | |
1d804d07 | 10053 | return false; |
644d711a NHE |
10054 | } |
10055 | ||
a7cde481 LA |
10056 | static bool nested_vmx_exit_handled_vmcs_access(struct kvm_vcpu *vcpu, |
10057 | struct vmcs12 *vmcs12, gpa_t bitmap) | |
10058 | { | |
10059 | u32 vmx_instruction_info; | |
10060 | unsigned long field; | |
10061 | u8 b; | |
10062 | ||
10063 | if (!nested_cpu_has_shadow_vmcs(vmcs12)) | |
10064 | return true; | |
10065 | ||
10066 | /* Decode instruction info and find the field to access */ | |
10067 | vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
10068 | field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); | |
10069 | ||
10070 | /* Out-of-range fields always cause a VM exit from L2 to L1 */ | |
10071 | if (field >> 15) | |
10072 | return true; | |
10073 | ||
10074 | if (kvm_vcpu_read_guest(vcpu, bitmap + field/8, &b, 1)) | |
10075 | return true; | |
10076 | ||
10077 | return 1 & (b >> (field & 7)); | |
10078 | } | |
10079 | ||
644d711a NHE |
10080 | /* |
10081 | * Return 1 if we should exit from L2 to L1 to handle an exit, or 0 if we | |
10082 | * should handle it ourselves in L0 (and then continue L2). Only call this | |
10083 | * when in is_guest_mode (L2). | |
10084 | */ | |
7313c698 | 10085 | static bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason) |
644d711a | 10086 | { |
644d711a NHE |
10087 | u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
10088 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
10089 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
10090 | ||
4f350c6d JM |
10091 | if (vmx->nested.nested_run_pending) |
10092 | return false; | |
10093 | ||
10094 | if (unlikely(vmx->fail)) { | |
10095 | pr_info_ratelimited("%s failed vm entry %x\n", __func__, | |
10096 | vmcs_read32(VM_INSTRUCTION_ERROR)); | |
10097 | return true; | |
10098 | } | |
542060ea | 10099 | |
c9f04407 DM |
10100 | /* |
10101 | * The host physical addresses of some pages of guest memory | |
de3a0021 JM |
10102 | * are loaded into the vmcs02 (e.g. vmcs12's Virtual APIC |
10103 | * Page). The CPU may write to these pages via their host | |
10104 | * physical address while L2 is running, bypassing any | |
10105 | * address-translation-based dirty tracking (e.g. EPT write | |
10106 | * protection). | |
c9f04407 DM |
10107 | * |
10108 | * Mark them dirty on every exit from L2 to prevent them from | |
10109 | * getting out of sync with dirty tracking. | |
10110 | */ | |
10111 | nested_mark_vmcs12_pages_dirty(vcpu); | |
10112 | ||
4f350c6d JM |
10113 | trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason, |
10114 | vmcs_readl(EXIT_QUALIFICATION), | |
10115 | vmx->idt_vectoring_info, | |
10116 | intr_info, | |
10117 | vmcs_read32(VM_EXIT_INTR_ERROR_CODE), | |
10118 | KVM_ISA_VMX); | |
644d711a NHE |
10119 | |
10120 | switch (exit_reason) { | |
10121 | case EXIT_REASON_EXCEPTION_NMI: | |
ef85b673 | 10122 | if (is_nmi(intr_info)) |
1d804d07 | 10123 | return false; |
644d711a | 10124 | else if (is_page_fault(intr_info)) |
52a5c155 | 10125 | return !vmx->vcpu.arch.apf.host_apf_reason && enable_ept; |
6f05485d JK |
10126 | else if (is_debug(intr_info) && |
10127 | vcpu->guest_debug & | |
10128 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
10129 | return false; | |
10130 | else if (is_breakpoint(intr_info) && | |
10131 | vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) | |
10132 | return false; | |
644d711a NHE |
10133 | return vmcs12->exception_bitmap & |
10134 | (1u << (intr_info & INTR_INFO_VECTOR_MASK)); | |
10135 | case EXIT_REASON_EXTERNAL_INTERRUPT: | |
1d804d07 | 10136 | return false; |
644d711a | 10137 | case EXIT_REASON_TRIPLE_FAULT: |
1d804d07 | 10138 | return true; |
644d711a | 10139 | case EXIT_REASON_PENDING_INTERRUPT: |
3b656cf7 | 10140 | return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_INTR_PENDING); |
644d711a | 10141 | case EXIT_REASON_NMI_WINDOW: |
3b656cf7 | 10142 | return nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING); |
644d711a | 10143 | case EXIT_REASON_TASK_SWITCH: |
1d804d07 | 10144 | return true; |
644d711a | 10145 | case EXIT_REASON_CPUID: |
1d804d07 | 10146 | return true; |
644d711a NHE |
10147 | case EXIT_REASON_HLT: |
10148 | return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING); | |
10149 | case EXIT_REASON_INVD: | |
1d804d07 | 10150 | return true; |
644d711a NHE |
10151 | case EXIT_REASON_INVLPG: |
10152 | return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING); | |
10153 | case EXIT_REASON_RDPMC: | |
10154 | return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING); | |
a5f46457 | 10155 | case EXIT_REASON_RDRAND: |
736fdf72 | 10156 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDRAND_EXITING); |
a5f46457 | 10157 | case EXIT_REASON_RDSEED: |
736fdf72 | 10158 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDSEED_EXITING); |
b3a2a907 | 10159 | case EXIT_REASON_RDTSC: case EXIT_REASON_RDTSCP: |
644d711a | 10160 | return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING); |
a7cde481 LA |
10161 | case EXIT_REASON_VMREAD: |
10162 | return nested_vmx_exit_handled_vmcs_access(vcpu, vmcs12, | |
10163 | vmcs12->vmread_bitmap); | |
10164 | case EXIT_REASON_VMWRITE: | |
10165 | return nested_vmx_exit_handled_vmcs_access(vcpu, vmcs12, | |
10166 | vmcs12->vmwrite_bitmap); | |
644d711a NHE |
10167 | case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR: |
10168 | case EXIT_REASON_VMLAUNCH: case EXIT_REASON_VMPTRLD: | |
a7cde481 | 10169 | case EXIT_REASON_VMPTRST: case EXIT_REASON_VMRESUME: |
644d711a | 10170 | case EXIT_REASON_VMOFF: case EXIT_REASON_VMON: |
a642fc30 | 10171 | case EXIT_REASON_INVEPT: case EXIT_REASON_INVVPID: |
644d711a NHE |
10172 | /* |
10173 | * VMX instructions trap unconditionally. This allows L1 to | |
10174 | * emulate them for its L2 guest, i.e., allows 3-level nesting! | |
10175 | */ | |
1d804d07 | 10176 | return true; |
644d711a NHE |
10177 | case EXIT_REASON_CR_ACCESS: |
10178 | return nested_vmx_exit_handled_cr(vcpu, vmcs12); | |
10179 | case EXIT_REASON_DR_ACCESS: | |
10180 | return nested_cpu_has(vmcs12, CPU_BASED_MOV_DR_EXITING); | |
10181 | case EXIT_REASON_IO_INSTRUCTION: | |
908a7bdd | 10182 | return nested_vmx_exit_handled_io(vcpu, vmcs12); |
1b07304c PB |
10183 | case EXIT_REASON_GDTR_IDTR: case EXIT_REASON_LDTR_TR: |
10184 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_DESC); | |
644d711a NHE |
10185 | case EXIT_REASON_MSR_READ: |
10186 | case EXIT_REASON_MSR_WRITE: | |
10187 | return nested_vmx_exit_handled_msr(vcpu, vmcs12, exit_reason); | |
10188 | case EXIT_REASON_INVALID_STATE: | |
1d804d07 | 10189 | return true; |
644d711a NHE |
10190 | case EXIT_REASON_MWAIT_INSTRUCTION: |
10191 | return nested_cpu_has(vmcs12, CPU_BASED_MWAIT_EXITING); | |
5f3d45e7 MD |
10192 | case EXIT_REASON_MONITOR_TRAP_FLAG: |
10193 | return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG); | |
644d711a NHE |
10194 | case EXIT_REASON_MONITOR_INSTRUCTION: |
10195 | return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_EXITING); | |
10196 | case EXIT_REASON_PAUSE_INSTRUCTION: | |
10197 | return nested_cpu_has(vmcs12, CPU_BASED_PAUSE_EXITING) || | |
10198 | nested_cpu_has2(vmcs12, | |
10199 | SECONDARY_EXEC_PAUSE_LOOP_EXITING); | |
10200 | case EXIT_REASON_MCE_DURING_VMENTRY: | |
1d804d07 | 10201 | return false; |
644d711a | 10202 | case EXIT_REASON_TPR_BELOW_THRESHOLD: |
a7c0b07d | 10203 | return nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW); |
644d711a | 10204 | case EXIT_REASON_APIC_ACCESS: |
82f0dd4b | 10205 | case EXIT_REASON_APIC_WRITE: |
608406e2 | 10206 | case EXIT_REASON_EOI_INDUCED: |
ab5df31c JM |
10207 | /* |
10208 | * The controls for "virtualize APIC accesses," "APIC- | |
10209 | * register virtualization," and "virtual-interrupt | |
10210 | * delivery" only come from vmcs12. | |
10211 | */ | |
1d804d07 | 10212 | return true; |
644d711a | 10213 | case EXIT_REASON_EPT_VIOLATION: |
2b1be677 NHE |
10214 | /* |
10215 | * L0 always deals with the EPT violation. If nested EPT is | |
10216 | * used, and the nested mmu code discovers that the address is | |
10217 | * missing in the guest EPT table (EPT12), the EPT violation | |
10218 | * will be injected with nested_ept_inject_page_fault() | |
10219 | */ | |
1d804d07 | 10220 | return false; |
644d711a | 10221 | case EXIT_REASON_EPT_MISCONFIG: |
2b1be677 NHE |
10222 | /* |
10223 | * L2 never uses directly L1's EPT, but rather L0's own EPT | |
10224 | * table (shadow on EPT) or a merged EPT table that L0 built | |
10225 | * (EPT on EPT). So any problems with the structure of the | |
10226 | * table is L0's fault. | |
10227 | */ | |
1d804d07 | 10228 | return false; |
90a2db6d PB |
10229 | case EXIT_REASON_INVPCID: |
10230 | return | |
10231 | nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_INVPCID) && | |
10232 | nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING); | |
644d711a NHE |
10233 | case EXIT_REASON_WBINVD: |
10234 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_WBINVD_EXITING); | |
10235 | case EXIT_REASON_XSETBV: | |
1d804d07 | 10236 | return true; |
81dc01f7 WL |
10237 | case EXIT_REASON_XSAVES: case EXIT_REASON_XRSTORS: |
10238 | /* | |
10239 | * This should never happen, since it is not possible to | |
10240 | * set XSS to a non-zero value---neither in L1 nor in L2. | |
10241 | * If if it were, XSS would have to be checked against | |
10242 | * the XSS exit bitmap in vmcs12. | |
10243 | */ | |
10244 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES); | |
55123e3c WL |
10245 | case EXIT_REASON_PREEMPTION_TIMER: |
10246 | return false; | |
ab007cc9 | 10247 | case EXIT_REASON_PML_FULL: |
03efce6f | 10248 | /* We emulate PML support to L1. */ |
ab007cc9 | 10249 | return false; |
2a499e49 BD |
10250 | case EXIT_REASON_VMFUNC: |
10251 | /* VM functions are emulated through L2->L0 vmexits. */ | |
10252 | return false; | |
0b665d30 SC |
10253 | case EXIT_REASON_ENCLS: |
10254 | /* SGX is never exposed to L1 */ | |
10255 | return false; | |
644d711a | 10256 | default: |
1d804d07 | 10257 | return true; |
644d711a NHE |
10258 | } |
10259 | } | |
10260 | ||
7313c698 PB |
10261 | static int nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason) |
10262 | { | |
10263 | u32 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
10264 | ||
10265 | /* | |
10266 | * At this point, the exit interruption info in exit_intr_info | |
10267 | * is only valid for EXCEPTION_NMI exits. For EXTERNAL_INTERRUPT | |
10268 | * we need to query the in-kernel LAPIC. | |
10269 | */ | |
10270 | WARN_ON(exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT); | |
10271 | if ((exit_intr_info & | |
10272 | (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) == | |
10273 | (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) { | |
10274 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
10275 | vmcs12->vm_exit_intr_error_code = | |
10276 | vmcs_read32(VM_EXIT_INTR_ERROR_CODE); | |
10277 | } | |
10278 | ||
10279 | nested_vmx_vmexit(vcpu, exit_reason, exit_intr_info, | |
10280 | vmcs_readl(EXIT_QUALIFICATION)); | |
10281 | return 1; | |
10282 | } | |
10283 | ||
586f9607 AK |
10284 | static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
10285 | { | |
10286 | *info1 = vmcs_readl(EXIT_QUALIFICATION); | |
10287 | *info2 = vmcs_read32(VM_EXIT_INTR_INFO); | |
10288 | } | |
10289 | ||
a3eaa864 | 10290 | static void vmx_destroy_pml_buffer(struct vcpu_vmx *vmx) |
843e4330 | 10291 | { |
a3eaa864 KH |
10292 | if (vmx->pml_pg) { |
10293 | __free_page(vmx->pml_pg); | |
10294 | vmx->pml_pg = NULL; | |
10295 | } | |
843e4330 KH |
10296 | } |
10297 | ||
54bf36aa | 10298 | static void vmx_flush_pml_buffer(struct kvm_vcpu *vcpu) |
843e4330 | 10299 | { |
54bf36aa | 10300 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
843e4330 KH |
10301 | u64 *pml_buf; |
10302 | u16 pml_idx; | |
10303 | ||
10304 | pml_idx = vmcs_read16(GUEST_PML_INDEX); | |
10305 | ||
10306 | /* Do nothing if PML buffer is empty */ | |
10307 | if (pml_idx == (PML_ENTITY_NUM - 1)) | |
10308 | return; | |
10309 | ||
10310 | /* PML index always points to next available PML buffer entity */ | |
10311 | if (pml_idx >= PML_ENTITY_NUM) | |
10312 | pml_idx = 0; | |
10313 | else | |
10314 | pml_idx++; | |
10315 | ||
10316 | pml_buf = page_address(vmx->pml_pg); | |
10317 | for (; pml_idx < PML_ENTITY_NUM; pml_idx++) { | |
10318 | u64 gpa; | |
10319 | ||
10320 | gpa = pml_buf[pml_idx]; | |
10321 | WARN_ON(gpa & (PAGE_SIZE - 1)); | |
54bf36aa | 10322 | kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT); |
843e4330 KH |
10323 | } |
10324 | ||
10325 | /* reset PML index */ | |
10326 | vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1); | |
10327 | } | |
10328 | ||
10329 | /* | |
10330 | * Flush all vcpus' PML buffer and update logged GPAs to dirty_bitmap. | |
10331 | * Called before reporting dirty_bitmap to userspace. | |
10332 | */ | |
10333 | static void kvm_flush_pml_buffers(struct kvm *kvm) | |
10334 | { | |
10335 | int i; | |
10336 | struct kvm_vcpu *vcpu; | |
10337 | /* | |
10338 | * We only need to kick vcpu out of guest mode here, as PML buffer | |
10339 | * is flushed at beginning of all VMEXITs, and it's obvious that only | |
10340 | * vcpus running in guest are possible to have unflushed GPAs in PML | |
10341 | * buffer. | |
10342 | */ | |
10343 | kvm_for_each_vcpu(i, vcpu, kvm) | |
10344 | kvm_vcpu_kick(vcpu); | |
10345 | } | |
10346 | ||
4eb64dce PB |
10347 | static void vmx_dump_sel(char *name, uint32_t sel) |
10348 | { | |
10349 | pr_err("%s sel=0x%04x, attr=0x%05x, limit=0x%08x, base=0x%016lx\n", | |
96794e4e | 10350 | name, vmcs_read16(sel), |
4eb64dce PB |
10351 | vmcs_read32(sel + GUEST_ES_AR_BYTES - GUEST_ES_SELECTOR), |
10352 | vmcs_read32(sel + GUEST_ES_LIMIT - GUEST_ES_SELECTOR), | |
10353 | vmcs_readl(sel + GUEST_ES_BASE - GUEST_ES_SELECTOR)); | |
10354 | } | |
10355 | ||
10356 | static void vmx_dump_dtsel(char *name, uint32_t limit) | |
10357 | { | |
10358 | pr_err("%s limit=0x%08x, base=0x%016lx\n", | |
10359 | name, vmcs_read32(limit), | |
10360 | vmcs_readl(limit + GUEST_GDTR_BASE - GUEST_GDTR_LIMIT)); | |
10361 | } | |
10362 | ||
10363 | static void dump_vmcs(void) | |
10364 | { | |
10365 | u32 vmentry_ctl = vmcs_read32(VM_ENTRY_CONTROLS); | |
10366 | u32 vmexit_ctl = vmcs_read32(VM_EXIT_CONTROLS); | |
10367 | u32 cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
10368 | u32 pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL); | |
10369 | u32 secondary_exec_control = 0; | |
10370 | unsigned long cr4 = vmcs_readl(GUEST_CR4); | |
f3531054 | 10371 | u64 efer = vmcs_read64(GUEST_IA32_EFER); |
4eb64dce PB |
10372 | int i, n; |
10373 | ||
10374 | if (cpu_has_secondary_exec_ctrls()) | |
10375 | secondary_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
10376 | ||
10377 | pr_err("*** Guest State ***\n"); | |
10378 | pr_err("CR0: actual=0x%016lx, shadow=0x%016lx, gh_mask=%016lx\n", | |
10379 | vmcs_readl(GUEST_CR0), vmcs_readl(CR0_READ_SHADOW), | |
10380 | vmcs_readl(CR0_GUEST_HOST_MASK)); | |
10381 | pr_err("CR4: actual=0x%016lx, shadow=0x%016lx, gh_mask=%016lx\n", | |
10382 | cr4, vmcs_readl(CR4_READ_SHADOW), vmcs_readl(CR4_GUEST_HOST_MASK)); | |
10383 | pr_err("CR3 = 0x%016lx\n", vmcs_readl(GUEST_CR3)); | |
10384 | if ((secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT) && | |
10385 | (cr4 & X86_CR4_PAE) && !(efer & EFER_LMA)) | |
10386 | { | |
845c5b40 PB |
10387 | pr_err("PDPTR0 = 0x%016llx PDPTR1 = 0x%016llx\n", |
10388 | vmcs_read64(GUEST_PDPTR0), vmcs_read64(GUEST_PDPTR1)); | |
10389 | pr_err("PDPTR2 = 0x%016llx PDPTR3 = 0x%016llx\n", | |
10390 | vmcs_read64(GUEST_PDPTR2), vmcs_read64(GUEST_PDPTR3)); | |
4eb64dce PB |
10391 | } |
10392 | pr_err("RSP = 0x%016lx RIP = 0x%016lx\n", | |
10393 | vmcs_readl(GUEST_RSP), vmcs_readl(GUEST_RIP)); | |
10394 | pr_err("RFLAGS=0x%08lx DR7 = 0x%016lx\n", | |
10395 | vmcs_readl(GUEST_RFLAGS), vmcs_readl(GUEST_DR7)); | |
10396 | pr_err("Sysenter RSP=%016lx CS:RIP=%04x:%016lx\n", | |
10397 | vmcs_readl(GUEST_SYSENTER_ESP), | |
10398 | vmcs_read32(GUEST_SYSENTER_CS), vmcs_readl(GUEST_SYSENTER_EIP)); | |
10399 | vmx_dump_sel("CS: ", GUEST_CS_SELECTOR); | |
10400 | vmx_dump_sel("DS: ", GUEST_DS_SELECTOR); | |
10401 | vmx_dump_sel("SS: ", GUEST_SS_SELECTOR); | |
10402 | vmx_dump_sel("ES: ", GUEST_ES_SELECTOR); | |
10403 | vmx_dump_sel("FS: ", GUEST_FS_SELECTOR); | |
10404 | vmx_dump_sel("GS: ", GUEST_GS_SELECTOR); | |
10405 | vmx_dump_dtsel("GDTR:", GUEST_GDTR_LIMIT); | |
10406 | vmx_dump_sel("LDTR:", GUEST_LDTR_SELECTOR); | |
10407 | vmx_dump_dtsel("IDTR:", GUEST_IDTR_LIMIT); | |
10408 | vmx_dump_sel("TR: ", GUEST_TR_SELECTOR); | |
10409 | if ((vmexit_ctl & (VM_EXIT_SAVE_IA32_PAT | VM_EXIT_SAVE_IA32_EFER)) || | |
10410 | (vmentry_ctl & (VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_IA32_EFER))) | |
845c5b40 PB |
10411 | pr_err("EFER = 0x%016llx PAT = 0x%016llx\n", |
10412 | efer, vmcs_read64(GUEST_IA32_PAT)); | |
10413 | pr_err("DebugCtl = 0x%016llx DebugExceptions = 0x%016lx\n", | |
10414 | vmcs_read64(GUEST_IA32_DEBUGCTL), | |
4eb64dce | 10415 | vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS)); |
773e8a04 VK |
10416 | if (cpu_has_load_perf_global_ctrl && |
10417 | vmentry_ctl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) | |
845c5b40 PB |
10418 | pr_err("PerfGlobCtl = 0x%016llx\n", |
10419 | vmcs_read64(GUEST_IA32_PERF_GLOBAL_CTRL)); | |
4eb64dce | 10420 | if (vmentry_ctl & VM_ENTRY_LOAD_BNDCFGS) |
845c5b40 | 10421 | pr_err("BndCfgS = 0x%016llx\n", vmcs_read64(GUEST_BNDCFGS)); |
4eb64dce PB |
10422 | pr_err("Interruptibility = %08x ActivityState = %08x\n", |
10423 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO), | |
10424 | vmcs_read32(GUEST_ACTIVITY_STATE)); | |
10425 | if (secondary_exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) | |
10426 | pr_err("InterruptStatus = %04x\n", | |
10427 | vmcs_read16(GUEST_INTR_STATUS)); | |
10428 | ||
10429 | pr_err("*** Host State ***\n"); | |
10430 | pr_err("RIP = 0x%016lx RSP = 0x%016lx\n", | |
10431 | vmcs_readl(HOST_RIP), vmcs_readl(HOST_RSP)); | |
10432 | pr_err("CS=%04x SS=%04x DS=%04x ES=%04x FS=%04x GS=%04x TR=%04x\n", | |
10433 | vmcs_read16(HOST_CS_SELECTOR), vmcs_read16(HOST_SS_SELECTOR), | |
10434 | vmcs_read16(HOST_DS_SELECTOR), vmcs_read16(HOST_ES_SELECTOR), | |
10435 | vmcs_read16(HOST_FS_SELECTOR), vmcs_read16(HOST_GS_SELECTOR), | |
10436 | vmcs_read16(HOST_TR_SELECTOR)); | |
10437 | pr_err("FSBase=%016lx GSBase=%016lx TRBase=%016lx\n", | |
10438 | vmcs_readl(HOST_FS_BASE), vmcs_readl(HOST_GS_BASE), | |
10439 | vmcs_readl(HOST_TR_BASE)); | |
10440 | pr_err("GDTBase=%016lx IDTBase=%016lx\n", | |
10441 | vmcs_readl(HOST_GDTR_BASE), vmcs_readl(HOST_IDTR_BASE)); | |
10442 | pr_err("CR0=%016lx CR3=%016lx CR4=%016lx\n", | |
10443 | vmcs_readl(HOST_CR0), vmcs_readl(HOST_CR3), | |
10444 | vmcs_readl(HOST_CR4)); | |
10445 | pr_err("Sysenter RSP=%016lx CS:RIP=%04x:%016lx\n", | |
10446 | vmcs_readl(HOST_IA32_SYSENTER_ESP), | |
10447 | vmcs_read32(HOST_IA32_SYSENTER_CS), | |
10448 | vmcs_readl(HOST_IA32_SYSENTER_EIP)); | |
10449 | if (vmexit_ctl & (VM_EXIT_LOAD_IA32_PAT | VM_EXIT_LOAD_IA32_EFER)) | |
845c5b40 PB |
10450 | pr_err("EFER = 0x%016llx PAT = 0x%016llx\n", |
10451 | vmcs_read64(HOST_IA32_EFER), | |
10452 | vmcs_read64(HOST_IA32_PAT)); | |
773e8a04 VK |
10453 | if (cpu_has_load_perf_global_ctrl && |
10454 | vmexit_ctl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) | |
845c5b40 PB |
10455 | pr_err("PerfGlobCtl = 0x%016llx\n", |
10456 | vmcs_read64(HOST_IA32_PERF_GLOBAL_CTRL)); | |
4eb64dce PB |
10457 | |
10458 | pr_err("*** Control State ***\n"); | |
10459 | pr_err("PinBased=%08x CPUBased=%08x SecondaryExec=%08x\n", | |
10460 | pin_based_exec_ctrl, cpu_based_exec_ctrl, secondary_exec_control); | |
10461 | pr_err("EntryControls=%08x ExitControls=%08x\n", vmentry_ctl, vmexit_ctl); | |
10462 | pr_err("ExceptionBitmap=%08x PFECmask=%08x PFECmatch=%08x\n", | |
10463 | vmcs_read32(EXCEPTION_BITMAP), | |
10464 | vmcs_read32(PAGE_FAULT_ERROR_CODE_MASK), | |
10465 | vmcs_read32(PAGE_FAULT_ERROR_CODE_MATCH)); | |
10466 | pr_err("VMEntry: intr_info=%08x errcode=%08x ilen=%08x\n", | |
10467 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), | |
10468 | vmcs_read32(VM_ENTRY_EXCEPTION_ERROR_CODE), | |
10469 | vmcs_read32(VM_ENTRY_INSTRUCTION_LEN)); | |
10470 | pr_err("VMExit: intr_info=%08x errcode=%08x ilen=%08x\n", | |
10471 | vmcs_read32(VM_EXIT_INTR_INFO), | |
10472 | vmcs_read32(VM_EXIT_INTR_ERROR_CODE), | |
10473 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN)); | |
10474 | pr_err(" reason=%08x qualification=%016lx\n", | |
10475 | vmcs_read32(VM_EXIT_REASON), vmcs_readl(EXIT_QUALIFICATION)); | |
10476 | pr_err("IDTVectoring: info=%08x errcode=%08x\n", | |
10477 | vmcs_read32(IDT_VECTORING_INFO_FIELD), | |
10478 | vmcs_read32(IDT_VECTORING_ERROR_CODE)); | |
845c5b40 | 10479 | pr_err("TSC Offset = 0x%016llx\n", vmcs_read64(TSC_OFFSET)); |
8cfe9866 | 10480 | if (secondary_exec_control & SECONDARY_EXEC_TSC_SCALING) |
845c5b40 PB |
10481 | pr_err("TSC Multiplier = 0x%016llx\n", |
10482 | vmcs_read64(TSC_MULTIPLIER)); | |
4eb64dce PB |
10483 | if (cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW) |
10484 | pr_err("TPR Threshold = 0x%02x\n", vmcs_read32(TPR_THRESHOLD)); | |
10485 | if (pin_based_exec_ctrl & PIN_BASED_POSTED_INTR) | |
10486 | pr_err("PostedIntrVec = 0x%02x\n", vmcs_read16(POSTED_INTR_NV)); | |
10487 | if ((secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT)) | |
845c5b40 | 10488 | pr_err("EPT pointer = 0x%016llx\n", vmcs_read64(EPT_POINTER)); |
4eb64dce PB |
10489 | n = vmcs_read32(CR3_TARGET_COUNT); |
10490 | for (i = 0; i + 1 < n; i += 4) | |
10491 | pr_err("CR3 target%u=%016lx target%u=%016lx\n", | |
10492 | i, vmcs_readl(CR3_TARGET_VALUE0 + i * 2), | |
10493 | i + 1, vmcs_readl(CR3_TARGET_VALUE0 + i * 2 + 2)); | |
10494 | if (i < n) | |
10495 | pr_err("CR3 target%u=%016lx\n", | |
10496 | i, vmcs_readl(CR3_TARGET_VALUE0 + i * 2)); | |
10497 | if (secondary_exec_control & SECONDARY_EXEC_PAUSE_LOOP_EXITING) | |
10498 | pr_err("PLE Gap=%08x Window=%08x\n", | |
10499 | vmcs_read32(PLE_GAP), vmcs_read32(PLE_WINDOW)); | |
10500 | if (secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID) | |
10501 | pr_err("Virtual processor ID = 0x%04x\n", | |
10502 | vmcs_read16(VIRTUAL_PROCESSOR_ID)); | |
10503 | } | |
10504 | ||
6aa8b732 AK |
10505 | /* |
10506 | * The guest has exited. See if we can fix it or if we need userspace | |
10507 | * assistance. | |
10508 | */ | |
851ba692 | 10509 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 10510 | { |
29bd8a78 | 10511 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 10512 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 10513 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 10514 | |
8b89fe1f PB |
10515 | trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX); |
10516 | ||
843e4330 KH |
10517 | /* |
10518 | * Flush logged GPAs PML buffer, this will make dirty_bitmap more | |
10519 | * updated. Another good is, in kvm_vm_ioctl_get_dirty_log, before | |
10520 | * querying dirty_bitmap, we only need to kick all vcpus out of guest | |
10521 | * mode as if vcpus is in root mode, the PML buffer must has been | |
10522 | * flushed already. | |
10523 | */ | |
10524 | if (enable_pml) | |
54bf36aa | 10525 | vmx_flush_pml_buffer(vcpu); |
843e4330 | 10526 | |
80ced186 | 10527 | /* If guest state is invalid, start emulating */ |
14168786 | 10528 | if (vmx->emulation_required) |
80ced186 | 10529 | return handle_invalid_guest_state(vcpu); |
1d5a4d9b | 10530 | |
7313c698 PB |
10531 | if (is_guest_mode(vcpu) && nested_vmx_exit_reflected(vcpu, exit_reason)) |
10532 | return nested_vmx_reflect_vmexit(vcpu, exit_reason); | |
644d711a | 10533 | |
5120702e | 10534 | if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) { |
4eb64dce | 10535 | dump_vmcs(); |
5120702e MG |
10536 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
10537 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
10538 | = exit_reason; | |
10539 | return 0; | |
10540 | } | |
10541 | ||
29bd8a78 | 10542 | if (unlikely(vmx->fail)) { |
851ba692 AK |
10543 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
10544 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
10545 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
10546 | return 0; | |
10547 | } | |
6aa8b732 | 10548 | |
b9bf6882 XG |
10549 | /* |
10550 | * Note: | |
10551 | * Do not try to fix EXIT_REASON_EPT_MISCONFIG if it caused by | |
10552 | * delivery event since it indicates guest is accessing MMIO. | |
10553 | * The vm-exit can be triggered again after return to guest that | |
10554 | * will cause infinite loop. | |
10555 | */ | |
d77c26fc | 10556 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 10557 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac | 10558 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
b244c9fc | 10559 | exit_reason != EXIT_REASON_PML_FULL && |
b9bf6882 XG |
10560 | exit_reason != EXIT_REASON_TASK_SWITCH)) { |
10561 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
10562 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV; | |
70bcd708 | 10563 | vcpu->run->internal.ndata = 3; |
b9bf6882 XG |
10564 | vcpu->run->internal.data[0] = vectoring_info; |
10565 | vcpu->run->internal.data[1] = exit_reason; | |
70bcd708 PB |
10566 | vcpu->run->internal.data[2] = vcpu->arch.exit_qualification; |
10567 | if (exit_reason == EXIT_REASON_EPT_MISCONFIG) { | |
10568 | vcpu->run->internal.ndata++; | |
10569 | vcpu->run->internal.data[3] = | |
10570 | vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
10571 | } | |
b9bf6882 XG |
10572 | return 0; |
10573 | } | |
3b86cd99 | 10574 | |
d02fcf50 | 10575 | if (unlikely(!enable_vnmi && |
8a1b4392 PB |
10576 | vmx->loaded_vmcs->soft_vnmi_blocked)) { |
10577 | if (vmx_interrupt_allowed(vcpu)) { | |
10578 | vmx->loaded_vmcs->soft_vnmi_blocked = 0; | |
10579 | } else if (vmx->loaded_vmcs->vnmi_blocked_time > 1000000000LL && | |
10580 | vcpu->arch.nmi_pending) { | |
10581 | /* | |
10582 | * This CPU don't support us in finding the end of an | |
10583 | * NMI-blocked window if the guest runs with IRQs | |
10584 | * disabled. So we pull the trigger after 1 s of | |
10585 | * futile waiting, but inform the user about this. | |
10586 | */ | |
10587 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
10588 | "state on VCPU %d after 1 s timeout\n", | |
10589 | __func__, vcpu->vcpu_id); | |
10590 | vmx->loaded_vmcs->soft_vnmi_blocked = 0; | |
10591 | } | |
10592 | } | |
10593 | ||
6aa8b732 AK |
10594 | if (exit_reason < kvm_vmx_max_exit_handlers |
10595 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 10596 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 10597 | else { |
6c6c5e03 RK |
10598 | vcpu_unimpl(vcpu, "vmx: unexpected exit reason 0x%x\n", |
10599 | exit_reason); | |
2bc19dc3 MT |
10600 | kvm_queue_exception(vcpu, UD_VECTOR); |
10601 | return 1; | |
6aa8b732 | 10602 | } |
6aa8b732 AK |
10603 | } |
10604 | ||
a47dd5f0 PB |
10605 | /* |
10606 | * Software based L1D cache flush which is used when microcode providing | |
10607 | * the cache control MSR is not loaded. | |
10608 | * | |
10609 | * The L1D cache is 32 KiB on Nehalem and later microarchitectures, but to | |
10610 | * flush it is required to read in 64 KiB because the replacement algorithm | |
10611 | * is not exactly LRU. This could be sized at runtime via topology | |
10612 | * information but as all relevant affected CPUs have 32KiB L1D cache size | |
10613 | * there is no point in doing so. | |
10614 | */ | |
c595ceee | 10615 | static void vmx_l1d_flush(struct kvm_vcpu *vcpu) |
a47dd5f0 PB |
10616 | { |
10617 | int size = PAGE_SIZE << L1D_CACHE_ORDER; | |
c595ceee PB |
10618 | |
10619 | /* | |
2f055947 TG |
10620 | * This code is only executed when the the flush mode is 'cond' or |
10621 | * 'always' | |
c595ceee | 10622 | */ |
427362a1 | 10623 | if (static_branch_likely(&vmx_l1d_flush_cond)) { |
45b575c0 | 10624 | bool flush_l1d; |
5b6ccc6c | 10625 | |
379fd0c7 | 10626 | /* |
45b575c0 NS |
10627 | * Clear the per-vcpu flush bit, it gets set again |
10628 | * either from vcpu_run() or from one of the unsafe | |
10629 | * VMEXIT handlers. | |
379fd0c7 | 10630 | */ |
45b575c0 | 10631 | flush_l1d = vcpu->arch.l1tf_flush_l1d; |
4c6523ec | 10632 | vcpu->arch.l1tf_flush_l1d = false; |
45b575c0 NS |
10633 | |
10634 | /* | |
10635 | * Clear the per-cpu flush bit, it gets set again from | |
10636 | * the interrupt handlers. | |
10637 | */ | |
10638 | flush_l1d |= kvm_get_cpu_l1tf_flush_l1d(); | |
10639 | kvm_clear_cpu_l1tf_flush_l1d(); | |
10640 | ||
5b6ccc6c NS |
10641 | if (!flush_l1d) |
10642 | return; | |
379fd0c7 | 10643 | } |
c595ceee PB |
10644 | |
10645 | vcpu->stat.l1d_flush++; | |
a47dd5f0 | 10646 | |
3fa045be PB |
10647 | if (static_cpu_has(X86_FEATURE_FLUSH_L1D)) { |
10648 | wrmsrl(MSR_IA32_FLUSH_CMD, L1D_FLUSH); | |
10649 | return; | |
10650 | } | |
10651 | ||
a47dd5f0 PB |
10652 | asm volatile( |
10653 | /* First ensure the pages are in the TLB */ | |
10654 | "xorl %%eax, %%eax\n" | |
10655 | ".Lpopulate_tlb:\n\t" | |
288d152c | 10656 | "movzbl (%[flush_pages], %%" _ASM_AX "), %%ecx\n\t" |
a47dd5f0 PB |
10657 | "addl $4096, %%eax\n\t" |
10658 | "cmpl %%eax, %[size]\n\t" | |
10659 | "jne .Lpopulate_tlb\n\t" | |
10660 | "xorl %%eax, %%eax\n\t" | |
10661 | "cpuid\n\t" | |
10662 | /* Now fill the cache */ | |
10663 | "xorl %%eax, %%eax\n" | |
10664 | ".Lfill_cache:\n" | |
288d152c | 10665 | "movzbl (%[flush_pages], %%" _ASM_AX "), %%ecx\n\t" |
a47dd5f0 PB |
10666 | "addl $64, %%eax\n\t" |
10667 | "cmpl %%eax, %[size]\n\t" | |
10668 | "jne .Lfill_cache\n\t" | |
10669 | "lfence\n" | |
288d152c | 10670 | :: [flush_pages] "r" (vmx_l1d_flush_pages), |
a47dd5f0 PB |
10671 | [size] "r" (size) |
10672 | : "eax", "ebx", "ecx", "edx"); | |
10673 | } | |
10674 | ||
95ba8273 | 10675 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 10676 | { |
a7c0b07d WL |
10677 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
10678 | ||
10679 | if (is_guest_mode(vcpu) && | |
10680 | nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) | |
10681 | return; | |
10682 | ||
95ba8273 | 10683 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
10684 | vmcs_write32(TPR_THRESHOLD, 0); |
10685 | return; | |
10686 | } | |
10687 | ||
95ba8273 | 10688 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
10689 | } |
10690 | ||
8d860bbe | 10691 | static void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu) |
8d14695f YZ |
10692 | { |
10693 | u32 sec_exec_control; | |
10694 | ||
8d860bbe JM |
10695 | if (!lapic_in_kernel(vcpu)) |
10696 | return; | |
10697 | ||
fd6b6d9b SC |
10698 | if (!flexpriority_enabled && |
10699 | !cpu_has_vmx_virtualize_x2apic_mode()) | |
10700 | return; | |
10701 | ||
dccbfcf5 RK |
10702 | /* Postpone execution until vmcs01 is the current VMCS. */ |
10703 | if (is_guest_mode(vcpu)) { | |
8d860bbe | 10704 | to_vmx(vcpu)->nested.change_vmcs01_virtual_apic_mode = true; |
dccbfcf5 RK |
10705 | return; |
10706 | } | |
10707 | ||
8d14695f | 10708 | sec_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); |
8d860bbe JM |
10709 | sec_exec_control &= ~(SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
10710 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE); | |
8d14695f | 10711 | |
8d860bbe JM |
10712 | switch (kvm_get_apic_mode(vcpu)) { |
10713 | case LAPIC_MODE_INVALID: | |
10714 | WARN_ONCE(true, "Invalid local APIC state"); | |
10715 | case LAPIC_MODE_DISABLED: | |
10716 | break; | |
10717 | case LAPIC_MODE_XAPIC: | |
10718 | if (flexpriority_enabled) { | |
10719 | sec_exec_control |= | |
10720 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
10721 | vmx_flush_tlb(vcpu, true); | |
10722 | } | |
10723 | break; | |
10724 | case LAPIC_MODE_X2APIC: | |
10725 | if (cpu_has_vmx_virtualize_x2apic_mode()) | |
10726 | sec_exec_control |= | |
10727 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
10728 | break; | |
8d14695f YZ |
10729 | } |
10730 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, sec_exec_control); | |
10731 | ||
904e14fb | 10732 | vmx_update_msr_bitmap(vcpu); |
8d14695f YZ |
10733 | } |
10734 | ||
38b99173 TC |
10735 | static void vmx_set_apic_access_page_addr(struct kvm_vcpu *vcpu, hpa_t hpa) |
10736 | { | |
ab5df31c | 10737 | if (!is_guest_mode(vcpu)) { |
38b99173 | 10738 | vmcs_write64(APIC_ACCESS_ADDR, hpa); |
a468f2db | 10739 | vmx_flush_tlb(vcpu, true); |
fb6c8198 | 10740 | } |
38b99173 TC |
10741 | } |
10742 | ||
67c9dddc | 10743 | static void vmx_hwapic_isr_update(struct kvm_vcpu *vcpu, int max_isr) |
c7c9c56c YZ |
10744 | { |
10745 | u16 status; | |
10746 | u8 old; | |
10747 | ||
67c9dddc PB |
10748 | if (max_isr == -1) |
10749 | max_isr = 0; | |
c7c9c56c YZ |
10750 | |
10751 | status = vmcs_read16(GUEST_INTR_STATUS); | |
10752 | old = status >> 8; | |
67c9dddc | 10753 | if (max_isr != old) { |
c7c9c56c | 10754 | status &= 0xff; |
67c9dddc | 10755 | status |= max_isr << 8; |
c7c9c56c YZ |
10756 | vmcs_write16(GUEST_INTR_STATUS, status); |
10757 | } | |
10758 | } | |
10759 | ||
10760 | static void vmx_set_rvi(int vector) | |
10761 | { | |
10762 | u16 status; | |
10763 | u8 old; | |
10764 | ||
4114c27d WW |
10765 | if (vector == -1) |
10766 | vector = 0; | |
10767 | ||
c7c9c56c YZ |
10768 | status = vmcs_read16(GUEST_INTR_STATUS); |
10769 | old = (u8)status & 0xff; | |
10770 | if ((u8)vector != old) { | |
10771 | status &= ~0xff; | |
10772 | status |= (u8)vector; | |
10773 | vmcs_write16(GUEST_INTR_STATUS, status); | |
10774 | } | |
10775 | } | |
10776 | ||
10777 | static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr) | |
10778 | { | |
963fee16 | 10779 | /* |
851c1a18 LA |
10780 | * When running L2, updating RVI is only relevant when |
10781 | * vmcs12 virtual-interrupt-delivery enabled. | |
10782 | * However, it can be enabled only when L1 also | |
10783 | * intercepts external-interrupts and in that case | |
10784 | * we should not update vmcs02 RVI but instead intercept | |
10785 | * interrupt. Therefore, do nothing when running L2. | |
963fee16 | 10786 | */ |
851c1a18 LA |
10787 | if (!is_guest_mode(vcpu)) |
10788 | vmx_set_rvi(max_irr); | |
c7c9c56c YZ |
10789 | } |
10790 | ||
76dfafd5 | 10791 | static int vmx_sync_pir_to_irr(struct kvm_vcpu *vcpu) |
810e6def PB |
10792 | { |
10793 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
76dfafd5 | 10794 | int max_irr; |
f27a85c4 | 10795 | bool max_irr_updated; |
810e6def | 10796 | |
76dfafd5 PB |
10797 | WARN_ON(!vcpu->arch.apicv_active); |
10798 | if (pi_test_on(&vmx->pi_desc)) { | |
10799 | pi_clear_on(&vmx->pi_desc); | |
10800 | /* | |
10801 | * IOMMU can write to PIR.ON, so the barrier matters even on UP. | |
10802 | * But on x86 this is just a compiler barrier anyway. | |
10803 | */ | |
10804 | smp_mb__after_atomic(); | |
f27a85c4 LA |
10805 | max_irr_updated = |
10806 | kvm_apic_update_irr(vcpu, vmx->pi_desc.pir, &max_irr); | |
10807 | ||
10808 | /* | |
10809 | * If we are running L2 and L1 has a new pending interrupt | |
10810 | * which can be injected, we should re-evaluate | |
10811 | * what should be done with this new L1 interrupt. | |
851c1a18 LA |
10812 | * If L1 intercepts external-interrupts, we should |
10813 | * exit from L2 to L1. Otherwise, interrupt should be | |
10814 | * delivered directly to L2. | |
f27a85c4 | 10815 | */ |
851c1a18 LA |
10816 | if (is_guest_mode(vcpu) && max_irr_updated) { |
10817 | if (nested_exit_on_intr(vcpu)) | |
10818 | kvm_vcpu_exiting_guest_mode(vcpu); | |
10819 | else | |
10820 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
10821 | } | |
76dfafd5 PB |
10822 | } else { |
10823 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
10824 | } | |
10825 | vmx_hwapic_irr_update(vcpu, max_irr); | |
10826 | return max_irr; | |
810e6def PB |
10827 | } |
10828 | ||
7e712684 PB |
10829 | static u8 vmx_has_apicv_interrupt(struct kvm_vcpu *vcpu) |
10830 | { | |
10831 | u8 rvi = vmx_get_rvi(); | |
10832 | u8 vppr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_PROCPRI); | |
10833 | ||
10834 | return ((rvi & 0xf0) > (vppr & 0xf0)); | |
10835 | } | |
10836 | ||
6308630b | 10837 | static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) |
c7c9c56c | 10838 | { |
d62caabb | 10839 | if (!kvm_vcpu_apicv_active(vcpu)) |
3d81bc7e YZ |
10840 | return; |
10841 | ||
c7c9c56c YZ |
10842 | vmcs_write64(EOI_EXIT_BITMAP0, eoi_exit_bitmap[0]); |
10843 | vmcs_write64(EOI_EXIT_BITMAP1, eoi_exit_bitmap[1]); | |
10844 | vmcs_write64(EOI_EXIT_BITMAP2, eoi_exit_bitmap[2]); | |
10845 | vmcs_write64(EOI_EXIT_BITMAP3, eoi_exit_bitmap[3]); | |
10846 | } | |
10847 | ||
967235d3 PB |
10848 | static void vmx_apicv_post_state_restore(struct kvm_vcpu *vcpu) |
10849 | { | |
10850 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
10851 | ||
10852 | pi_clear_on(&vmx->pi_desc); | |
10853 | memset(vmx->pi_desc.pir, 0, sizeof(vmx->pi_desc.pir)); | |
10854 | } | |
10855 | ||
51aa01d1 | 10856 | static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) |
cf393f75 | 10857 | { |
48ae0fb4 JM |
10858 | u32 exit_intr_info = 0; |
10859 | u16 basic_exit_reason = (u16)vmx->exit_reason; | |
00eba012 | 10860 | |
48ae0fb4 JM |
10861 | if (!(basic_exit_reason == EXIT_REASON_MCE_DURING_VMENTRY |
10862 | || basic_exit_reason == EXIT_REASON_EXCEPTION_NMI)) | |
00eba012 AK |
10863 | return; |
10864 | ||
48ae0fb4 JM |
10865 | if (!(vmx->exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) |
10866 | exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
10867 | vmx->exit_intr_info = exit_intr_info; | |
a0861c02 | 10868 | |
1261bfa3 WL |
10869 | /* if exit due to PF check for async PF */ |
10870 | if (is_page_fault(exit_intr_info)) | |
10871 | vmx->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason(); | |
10872 | ||
a0861c02 | 10873 | /* Handle machine checks before interrupts are enabled */ |
48ae0fb4 JM |
10874 | if (basic_exit_reason == EXIT_REASON_MCE_DURING_VMENTRY || |
10875 | is_machine_check(exit_intr_info)) | |
a0861c02 AK |
10876 | kvm_machine_check(); |
10877 | ||
20f65983 | 10878 | /* We need to handle NMIs before interrupts are enabled */ |
ef85b673 | 10879 | if (is_nmi(exit_intr_info)) { |
dd60d217 | 10880 | kvm_before_interrupt(&vmx->vcpu); |
20f65983 | 10881 | asm("int $2"); |
dd60d217 | 10882 | kvm_after_interrupt(&vmx->vcpu); |
ff9d07a0 | 10883 | } |
51aa01d1 | 10884 | } |
20f65983 | 10885 | |
a547c6db YZ |
10886 | static void vmx_handle_external_intr(struct kvm_vcpu *vcpu) |
10887 | { | |
10888 | u32 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
10889 | ||
a547c6db YZ |
10890 | if ((exit_intr_info & (INTR_INFO_VALID_MASK | INTR_INFO_INTR_TYPE_MASK)) |
10891 | == (INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR)) { | |
10892 | unsigned int vector; | |
10893 | unsigned long entry; | |
10894 | gate_desc *desc; | |
10895 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
10896 | #ifdef CONFIG_X86_64 | |
10897 | unsigned long tmp; | |
10898 | #endif | |
10899 | ||
10900 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
10901 | desc = (gate_desc *)vmx->host_idt_base + vector; | |
64b163fa | 10902 | entry = gate_offset(desc); |
a547c6db YZ |
10903 | asm volatile( |
10904 | #ifdef CONFIG_X86_64 | |
10905 | "mov %%" _ASM_SP ", %[sp]\n\t" | |
10906 | "and $0xfffffffffffffff0, %%" _ASM_SP "\n\t" | |
10907 | "push $%c[ss]\n\t" | |
10908 | "push %[sp]\n\t" | |
10909 | #endif | |
10910 | "pushf\n\t" | |
a547c6db | 10911 | __ASM_SIZE(push) " $%c[cs]\n\t" |
c940a3fb | 10912 | CALL_NOSPEC |
a547c6db YZ |
10913 | : |
10914 | #ifdef CONFIG_X86_64 | |
3f62de5f | 10915 | [sp]"=&r"(tmp), |
a547c6db | 10916 | #endif |
f5caf621 | 10917 | ASM_CALL_CONSTRAINT |
a547c6db | 10918 | : |
c940a3fb | 10919 | THUNK_TARGET(entry), |
a547c6db YZ |
10920 | [ss]"i"(__KERNEL_DS), |
10921 | [cs]"i"(__KERNEL_CS) | |
10922 | ); | |
f2485b3e | 10923 | } |
a547c6db | 10924 | } |
c207aee4 | 10925 | STACK_FRAME_NON_STANDARD(vmx_handle_external_intr); |
a547c6db | 10926 | |
bc226f07 | 10927 | static bool vmx_has_emulated_msr(int index) |
6d396b55 | 10928 | { |
bc226f07 TL |
10929 | switch (index) { |
10930 | case MSR_IA32_SMBASE: | |
10931 | /* | |
10932 | * We cannot do SMM unless we can run the guest in big | |
10933 | * real mode. | |
10934 | */ | |
10935 | return enable_unrestricted_guest || emulate_invalid_guest_state; | |
10936 | case MSR_AMD64_VIRT_SPEC_CTRL: | |
10937 | /* This is AMD only. */ | |
10938 | return false; | |
10939 | default: | |
10940 | return true; | |
10941 | } | |
6d396b55 PB |
10942 | } |
10943 | ||
da8999d3 LJ |
10944 | static bool vmx_mpx_supported(void) |
10945 | { | |
10946 | return (vmcs_config.vmexit_ctrl & VM_EXIT_CLEAR_BNDCFGS) && | |
10947 | (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_BNDCFGS); | |
10948 | } | |
10949 | ||
55412b2e WL |
10950 | static bool vmx_xsaves_supported(void) |
10951 | { | |
10952 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
10953 | SECONDARY_EXEC_XSAVES; | |
10954 | } | |
10955 | ||
51aa01d1 AK |
10956 | static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) |
10957 | { | |
c5ca8e57 | 10958 | u32 exit_intr_info; |
51aa01d1 AK |
10959 | bool unblock_nmi; |
10960 | u8 vector; | |
10961 | bool idtv_info_valid; | |
10962 | ||
10963 | idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
20f65983 | 10964 | |
d02fcf50 | 10965 | if (enable_vnmi) { |
8a1b4392 PB |
10966 | if (vmx->loaded_vmcs->nmi_known_unmasked) |
10967 | return; | |
10968 | /* | |
10969 | * Can't use vmx->exit_intr_info since we're not sure what | |
10970 | * the exit reason is. | |
10971 | */ | |
10972 | exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
10973 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; | |
10974 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
10975 | /* | |
10976 | * SDM 3: 27.7.1.2 (September 2008) | |
10977 | * Re-set bit "block by NMI" before VM entry if vmexit caused by | |
10978 | * a guest IRET fault. | |
10979 | * SDM 3: 23.2.2 (September 2008) | |
10980 | * Bit 12 is undefined in any of the following cases: | |
10981 | * If the VM exit sets the valid bit in the IDT-vectoring | |
10982 | * information field. | |
10983 | * If the VM exit is due to a double fault. | |
10984 | */ | |
10985 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && | |
10986 | vector != DF_VECTOR && !idtv_info_valid) | |
10987 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
10988 | GUEST_INTR_STATE_NMI); | |
10989 | else | |
10990 | vmx->loaded_vmcs->nmi_known_unmasked = | |
10991 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) | |
10992 | & GUEST_INTR_STATE_NMI); | |
10993 | } else if (unlikely(vmx->loaded_vmcs->soft_vnmi_blocked)) | |
10994 | vmx->loaded_vmcs->vnmi_blocked_time += | |
10995 | ktime_to_ns(ktime_sub(ktime_get(), | |
10996 | vmx->loaded_vmcs->entry_time)); | |
51aa01d1 AK |
10997 | } |
10998 | ||
3ab66e8a | 10999 | static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu, |
83422e17 AK |
11000 | u32 idt_vectoring_info, |
11001 | int instr_len_field, | |
11002 | int error_code_field) | |
51aa01d1 | 11003 | { |
51aa01d1 AK |
11004 | u8 vector; |
11005 | int type; | |
11006 | bool idtv_info_valid; | |
11007 | ||
11008 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
668f612f | 11009 | |
3ab66e8a JK |
11010 | vcpu->arch.nmi_injected = false; |
11011 | kvm_clear_exception_queue(vcpu); | |
11012 | kvm_clear_interrupt_queue(vcpu); | |
37b96e98 GN |
11013 | |
11014 | if (!idtv_info_valid) | |
11015 | return; | |
11016 | ||
3ab66e8a | 11017 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3842d135 | 11018 | |
668f612f AK |
11019 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
11020 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 11021 | |
64a7ec06 | 11022 | switch (type) { |
37b96e98 | 11023 | case INTR_TYPE_NMI_INTR: |
3ab66e8a | 11024 | vcpu->arch.nmi_injected = true; |
668f612f | 11025 | /* |
7b4a25cb | 11026 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
11027 | * Clear bit "block by NMI" before VM entry if a NMI |
11028 | * delivery faulted. | |
668f612f | 11029 | */ |
3ab66e8a | 11030 | vmx_set_nmi_mask(vcpu, false); |
37b96e98 | 11031 | break; |
37b96e98 | 11032 | case INTR_TYPE_SOFT_EXCEPTION: |
3ab66e8a | 11033 | vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field); |
66fd3f7f GN |
11034 | /* fall through */ |
11035 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 11036 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
83422e17 | 11037 | u32 err = vmcs_read32(error_code_field); |
851eb667 | 11038 | kvm_requeue_exception_e(vcpu, vector, err); |
35920a35 | 11039 | } else |
851eb667 | 11040 | kvm_requeue_exception(vcpu, vector); |
37b96e98 | 11041 | break; |
66fd3f7f | 11042 | case INTR_TYPE_SOFT_INTR: |
3ab66e8a | 11043 | vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field); |
66fd3f7f | 11044 | /* fall through */ |
37b96e98 | 11045 | case INTR_TYPE_EXT_INTR: |
3ab66e8a | 11046 | kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR); |
37b96e98 GN |
11047 | break; |
11048 | default: | |
11049 | break; | |
f7d9238f | 11050 | } |
cf393f75 AK |
11051 | } |
11052 | ||
83422e17 AK |
11053 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
11054 | { | |
3ab66e8a | 11055 | __vmx_complete_interrupts(&vmx->vcpu, vmx->idt_vectoring_info, |
83422e17 AK |
11056 | VM_EXIT_INSTRUCTION_LEN, |
11057 | IDT_VECTORING_ERROR_CODE); | |
11058 | } | |
11059 | ||
b463a6f7 AK |
11060 | static void vmx_cancel_injection(struct kvm_vcpu *vcpu) |
11061 | { | |
3ab66e8a | 11062 | __vmx_complete_interrupts(vcpu, |
b463a6f7 AK |
11063 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), |
11064 | VM_ENTRY_INSTRUCTION_LEN, | |
11065 | VM_ENTRY_EXCEPTION_ERROR_CODE); | |
11066 | ||
11067 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
11068 | } | |
11069 | ||
d7cd9796 GN |
11070 | static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx) |
11071 | { | |
11072 | int i, nr_msrs; | |
11073 | struct perf_guest_switch_msr *msrs; | |
11074 | ||
11075 | msrs = perf_guest_get_msrs(&nr_msrs); | |
11076 | ||
11077 | if (!msrs) | |
11078 | return; | |
11079 | ||
11080 | for (i = 0; i < nr_msrs; i++) | |
11081 | if (msrs[i].host == msrs[i].guest) | |
11082 | clear_atomic_switch_msr(vmx, msrs[i].msr); | |
11083 | else | |
11084 | add_atomic_switch_msr(vmx, msrs[i].msr, msrs[i].guest, | |
989e3992 | 11085 | msrs[i].host, false); |
d7cd9796 GN |
11086 | } |
11087 | ||
f459a707 SC |
11088 | static void vmx_arm_hv_timer(struct vcpu_vmx *vmx, u32 val) |
11089 | { | |
11090 | vmcs_write32(VMX_PREEMPTION_TIMER_VALUE, val); | |
11091 | if (!vmx->loaded_vmcs->hv_timer_armed) | |
11092 | vmcs_set_bits(PIN_BASED_VM_EXEC_CONTROL, | |
11093 | PIN_BASED_VMX_PREEMPTION_TIMER); | |
11094 | vmx->loaded_vmcs->hv_timer_armed = true; | |
11095 | } | |
11096 | ||
11097 | static void vmx_update_hv_timer(struct kvm_vcpu *vcpu) | |
64672c95 YJ |
11098 | { |
11099 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
11100 | u64 tscl; | |
11101 | u32 delta_tsc; | |
11102 | ||
d264ee0c SC |
11103 | if (vmx->req_immediate_exit) { |
11104 | vmx_arm_hv_timer(vmx, 0); | |
11105 | return; | |
11106 | } | |
11107 | ||
f459a707 SC |
11108 | if (vmx->hv_deadline_tsc != -1) { |
11109 | tscl = rdtsc(); | |
11110 | if (vmx->hv_deadline_tsc > tscl) | |
11111 | /* set_hv_timer ensures the delta fits in 32-bits */ | |
11112 | delta_tsc = (u32)((vmx->hv_deadline_tsc - tscl) >> | |
11113 | cpu_preemption_timer_multi); | |
11114 | else | |
11115 | delta_tsc = 0; | |
64672c95 | 11116 | |
f459a707 SC |
11117 | vmx_arm_hv_timer(vmx, delta_tsc); |
11118 | return; | |
11119 | } | |
64672c95 | 11120 | |
f459a707 SC |
11121 | if (vmx->loaded_vmcs->hv_timer_armed) |
11122 | vmcs_clear_bits(PIN_BASED_VM_EXEC_CONTROL, | |
11123 | PIN_BASED_VMX_PREEMPTION_TIMER); | |
11124 | vmx->loaded_vmcs->hv_timer_armed = false; | |
64672c95 YJ |
11125 | } |
11126 | ||
a3b5ba49 | 11127 | static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 11128 | { |
a2fa3e9f | 11129 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
773e8a04 | 11130 | unsigned long cr3, cr4, evmcs_rsp; |
104f226b | 11131 | |
8a1b4392 | 11132 | /* Record the guest's net vcpu time for enforced NMI injections. */ |
d02fcf50 | 11133 | if (unlikely(!enable_vnmi && |
8a1b4392 PB |
11134 | vmx->loaded_vmcs->soft_vnmi_blocked)) |
11135 | vmx->loaded_vmcs->entry_time = ktime_get(); | |
11136 | ||
104f226b AK |
11137 | /* Don't enter VMX if guest state is invalid, let the exit handler |
11138 | start emulation until we arrive back to a valid state */ | |
14168786 | 11139 | if (vmx->emulation_required) |
104f226b AK |
11140 | return; |
11141 | ||
a7653ecd RK |
11142 | if (vmx->ple_window_dirty) { |
11143 | vmx->ple_window_dirty = false; | |
11144 | vmcs_write32(PLE_WINDOW, vmx->ple_window); | |
11145 | } | |
11146 | ||
945679e3 | 11147 | if (vmx->nested.need_vmcs12_sync) { |
8cab6507 VK |
11148 | /* |
11149 | * hv_evmcs may end up being not mapped after migration (when | |
11150 | * L2 was running), map it here to make sure vmcs12 changes are | |
11151 | * properly reflected. | |
11152 | */ | |
11153 | if (vmx->nested.enlightened_vmcs_enabled && | |
11154 | !vmx->nested.hv_evmcs) | |
11155 | nested_vmx_handle_enlightened_vmptrld(vcpu, false); | |
11156 | ||
945679e3 VK |
11157 | if (vmx->nested.hv_evmcs) { |
11158 | copy_vmcs12_to_enlightened(vmx); | |
11159 | /* All fields are clean */ | |
11160 | vmx->nested.hv_evmcs->hv_clean_fields |= | |
11161 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL; | |
11162 | } else { | |
11163 | copy_vmcs12_to_shadow(vmx); | |
11164 | } | |
11165 | vmx->nested.need_vmcs12_sync = false; | |
012f83cb AG |
11166 | } |
11167 | ||
104f226b AK |
11168 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) |
11169 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
11170 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
11171 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
11172 | ||
d6e41f11 | 11173 | cr3 = __get_current_cr3_fast(); |
d7ee039e | 11174 | if (unlikely(cr3 != vmx->loaded_vmcs->host_state.cr3)) { |
d6e41f11 | 11175 | vmcs_writel(HOST_CR3, cr3); |
d7ee039e | 11176 | vmx->loaded_vmcs->host_state.cr3 = cr3; |
d6e41f11 AL |
11177 | } |
11178 | ||
1e02ce4c | 11179 | cr4 = cr4_read_shadow(); |
d7ee039e | 11180 | if (unlikely(cr4 != vmx->loaded_vmcs->host_state.cr4)) { |
d974baa3 | 11181 | vmcs_writel(HOST_CR4, cr4); |
d7ee039e | 11182 | vmx->loaded_vmcs->host_state.cr4 = cr4; |
d974baa3 AL |
11183 | } |
11184 | ||
104f226b AK |
11185 | /* When single-stepping over STI and MOV SS, we must clear the |
11186 | * corresponding interruptibility bits in the guest state. Otherwise | |
11187 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
11188 | * exceptions being set, but that's not correct for the guest debugging | |
11189 | * case. */ | |
11190 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
11191 | vmx_set_interrupt_shadow(vcpu, 0); | |
11192 | ||
b9dd21e1 PB |
11193 | if (static_cpu_has(X86_FEATURE_PKU) && |
11194 | kvm_read_cr4_bits(vcpu, X86_CR4_PKE) && | |
11195 | vcpu->arch.pkru != vmx->host_pkru) | |
11196 | __write_pkru(vcpu->arch.pkru); | |
1be0e61c | 11197 | |
d7cd9796 GN |
11198 | atomic_switch_perf_msrs(vmx); |
11199 | ||
f459a707 | 11200 | vmx_update_hv_timer(vcpu); |
64672c95 | 11201 | |
d28b387f KA |
11202 | /* |
11203 | * If this vCPU has touched SPEC_CTRL, restore the guest's value if | |
11204 | * it's non-zero. Since vmentry is serialising on affected CPUs, there | |
11205 | * is no need to worry about the conditional branch over the wrmsr | |
11206 | * being speculatively taken. | |
11207 | */ | |
ccbcd267 | 11208 | x86_spec_ctrl_set_guest(vmx->spec_ctrl, 0); |
d28b387f | 11209 | |
d462b819 | 11210 | vmx->__launched = vmx->loaded_vmcs->launched; |
773e8a04 VK |
11211 | |
11212 | evmcs_rsp = static_branch_unlikely(&enable_evmcs) ? | |
11213 | (unsigned long)¤t_evmcs->host_rsp : 0; | |
11214 | ||
5b6ccc6c NS |
11215 | if (static_branch_unlikely(&vmx_l1d_should_flush)) |
11216 | vmx_l1d_flush(vcpu); | |
c595ceee | 11217 | |
104f226b | 11218 | asm( |
6aa8b732 | 11219 | /* Store host registers */ |
b188c81f AK |
11220 | "push %%" _ASM_DX "; push %%" _ASM_BP ";" |
11221 | "push %%" _ASM_CX " \n\t" /* placeholder for guest rcx */ | |
11222 | "push %%" _ASM_CX " \n\t" | |
11223 | "cmp %%" _ASM_SP ", %c[host_rsp](%0) \n\t" | |
313dbd49 | 11224 | "je 1f \n\t" |
b188c81f | 11225 | "mov %%" _ASM_SP ", %c[host_rsp](%0) \n\t" |
773e8a04 VK |
11226 | /* Avoid VMWRITE when Enlightened VMCS is in use */ |
11227 | "test %%" _ASM_SI ", %%" _ASM_SI " \n\t" | |
11228 | "jz 2f \n\t" | |
11229 | "mov %%" _ASM_SP ", (%%" _ASM_SI ") \n\t" | |
11230 | "jmp 1f \n\t" | |
11231 | "2: \n\t" | |
4b1e5478 | 11232 | __ex("vmwrite %%" _ASM_SP ", %%" _ASM_DX) "\n\t" |
313dbd49 | 11233 | "1: \n\t" |
d3edefc0 | 11234 | /* Reload cr2 if changed */ |
b188c81f AK |
11235 | "mov %c[cr2](%0), %%" _ASM_AX " \n\t" |
11236 | "mov %%cr2, %%" _ASM_DX " \n\t" | |
11237 | "cmp %%" _ASM_AX ", %%" _ASM_DX " \n\t" | |
773e8a04 | 11238 | "je 3f \n\t" |
b188c81f | 11239 | "mov %%" _ASM_AX", %%cr2 \n\t" |
773e8a04 | 11240 | "3: \n\t" |
6aa8b732 | 11241 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 11242 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 11243 | /* Load guest registers. Don't clobber flags. */ |
b188c81f AK |
11244 | "mov %c[rax](%0), %%" _ASM_AX " \n\t" |
11245 | "mov %c[rbx](%0), %%" _ASM_BX " \n\t" | |
11246 | "mov %c[rdx](%0), %%" _ASM_DX " \n\t" | |
11247 | "mov %c[rsi](%0), %%" _ASM_SI " \n\t" | |
11248 | "mov %c[rdi](%0), %%" _ASM_DI " \n\t" | |
11249 | "mov %c[rbp](%0), %%" _ASM_BP " \n\t" | |
05b3e0c2 | 11250 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
11251 | "mov %c[r8](%0), %%r8 \n\t" |
11252 | "mov %c[r9](%0), %%r9 \n\t" | |
11253 | "mov %c[r10](%0), %%r10 \n\t" | |
11254 | "mov %c[r11](%0), %%r11 \n\t" | |
11255 | "mov %c[r12](%0), %%r12 \n\t" | |
11256 | "mov %c[r13](%0), %%r13 \n\t" | |
11257 | "mov %c[r14](%0), %%r14 \n\t" | |
11258 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 11259 | #endif |
b188c81f | 11260 | "mov %c[rcx](%0), %%" _ASM_CX " \n\t" /* kills %0 (ecx) */ |
c801949d | 11261 | |
6aa8b732 | 11262 | /* Enter guest mode */ |
83287ea4 | 11263 | "jne 1f \n\t" |
4b1e5478 | 11264 | __ex("vmlaunch") "\n\t" |
83287ea4 | 11265 | "jmp 2f \n\t" |
4b1e5478 | 11266 | "1: " __ex("vmresume") "\n\t" |
83287ea4 | 11267 | "2: " |
6aa8b732 | 11268 | /* Save guest registers, load host registers, keep flags */ |
b188c81f | 11269 | "mov %0, %c[wordsize](%%" _ASM_SP ") \n\t" |
40712fae | 11270 | "pop %0 \n\t" |
0cb5b306 | 11271 | "setbe %c[fail](%0)\n\t" |
b188c81f AK |
11272 | "mov %%" _ASM_AX ", %c[rax](%0) \n\t" |
11273 | "mov %%" _ASM_BX ", %c[rbx](%0) \n\t" | |
11274 | __ASM_SIZE(pop) " %c[rcx](%0) \n\t" | |
11275 | "mov %%" _ASM_DX ", %c[rdx](%0) \n\t" | |
11276 | "mov %%" _ASM_SI ", %c[rsi](%0) \n\t" | |
11277 | "mov %%" _ASM_DI ", %c[rdi](%0) \n\t" | |
11278 | "mov %%" _ASM_BP ", %c[rbp](%0) \n\t" | |
05b3e0c2 | 11279 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
11280 | "mov %%r8, %c[r8](%0) \n\t" |
11281 | "mov %%r9, %c[r9](%0) \n\t" | |
11282 | "mov %%r10, %c[r10](%0) \n\t" | |
11283 | "mov %%r11, %c[r11](%0) \n\t" | |
11284 | "mov %%r12, %c[r12](%0) \n\t" | |
11285 | "mov %%r13, %c[r13](%0) \n\t" | |
11286 | "mov %%r14, %c[r14](%0) \n\t" | |
11287 | "mov %%r15, %c[r15](%0) \n\t" | |
43ce76ce UB |
11288 | /* |
11289 | * Clear host registers marked as clobbered to prevent | |
11290 | * speculative use. | |
11291 | */ | |
0cb5b306 JM |
11292 | "xor %%r8d, %%r8d \n\t" |
11293 | "xor %%r9d, %%r9d \n\t" | |
11294 | "xor %%r10d, %%r10d \n\t" | |
11295 | "xor %%r11d, %%r11d \n\t" | |
11296 | "xor %%r12d, %%r12d \n\t" | |
11297 | "xor %%r13d, %%r13d \n\t" | |
11298 | "xor %%r14d, %%r14d \n\t" | |
11299 | "xor %%r15d, %%r15d \n\t" | |
6aa8b732 | 11300 | #endif |
b188c81f AK |
11301 | "mov %%cr2, %%" _ASM_AX " \n\t" |
11302 | "mov %%" _ASM_AX ", %c[cr2](%0) \n\t" | |
c801949d | 11303 | |
0cb5b306 JM |
11304 | "xor %%eax, %%eax \n\t" |
11305 | "xor %%ebx, %%ebx \n\t" | |
11306 | "xor %%esi, %%esi \n\t" | |
11307 | "xor %%edi, %%edi \n\t" | |
b188c81f | 11308 | "pop %%" _ASM_BP "; pop %%" _ASM_DX " \n\t" |
83287ea4 AK |
11309 | ".pushsection .rodata \n\t" |
11310 | ".global vmx_return \n\t" | |
11311 | "vmx_return: " _ASM_PTR " 2b \n\t" | |
11312 | ".popsection" | |
773e8a04 | 11313 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), "S"(evmcs_rsp), |
d462b819 | 11314 | [launched]"i"(offsetof(struct vcpu_vmx, __launched)), |
e08aa78a | 11315 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), |
313dbd49 | 11316 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
11317 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
11318 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
11319 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
11320 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
11321 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
11322 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
11323 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 11324 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
11325 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
11326 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
11327 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
11328 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
11329 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
11330 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
11331 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
11332 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 11333 | #endif |
40712fae AK |
11334 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)), |
11335 | [wordsize]"i"(sizeof(ulong)) | |
c2036300 LV |
11336 | : "cc", "memory" |
11337 | #ifdef CONFIG_X86_64 | |
773e8a04 | 11338 | , "rax", "rbx", "rdi" |
c2036300 | 11339 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
b188c81f | 11340 | #else |
773e8a04 | 11341 | , "eax", "ebx", "edi" |
c2036300 LV |
11342 | #endif |
11343 | ); | |
6aa8b732 | 11344 | |
d28b387f KA |
11345 | /* |
11346 | * We do not use IBRS in the kernel. If this vCPU has used the | |
11347 | * SPEC_CTRL MSR it may have left it on; save the value and | |
11348 | * turn it off. This is much more efficient than blindly adding | |
11349 | * it to the atomic save/restore list. Especially as the former | |
11350 | * (Saving guest MSRs on vmexit) doesn't even exist in KVM. | |
11351 | * | |
11352 | * For non-nested case: | |
11353 | * If the L01 MSR bitmap does not intercept the MSR, then we need to | |
11354 | * save it. | |
11355 | * | |
11356 | * For nested case: | |
11357 | * If the L02 MSR bitmap does not intercept the MSR, then we need to | |
11358 | * save it. | |
11359 | */ | |
946fbbc1 | 11360 | if (unlikely(!msr_write_intercepted(vcpu, MSR_IA32_SPEC_CTRL))) |
ecb586bd | 11361 | vmx->spec_ctrl = native_read_msr(MSR_IA32_SPEC_CTRL); |
d28b387f | 11362 | |
ccbcd267 | 11363 | x86_spec_ctrl_restore_host(vmx->spec_ctrl, 0); |
d28b387f | 11364 | |
117cc7a9 DW |
11365 | /* Eliminate branch target predictions from guest mode */ |
11366 | vmexit_fill_RSB(); | |
11367 | ||
773e8a04 VK |
11368 | /* All fields are clean at this point */ |
11369 | if (static_branch_unlikely(&enable_evmcs)) | |
11370 | current_evmcs->hv_clean_fields |= | |
11371 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL; | |
11372 | ||
2a7921b7 | 11373 | /* MSR_IA32_DEBUGCTLMSR is zeroed on vmexit. Restore it if needed */ |
74c55931 WL |
11374 | if (vmx->host_debugctlmsr) |
11375 | update_debugctlmsr(vmx->host_debugctlmsr); | |
2a7921b7 | 11376 | |
aa67f609 AK |
11377 | #ifndef CONFIG_X86_64 |
11378 | /* | |
11379 | * The sysexit path does not restore ds/es, so we must set them to | |
11380 | * a reasonable value ourselves. | |
11381 | * | |
6d6095bd SC |
11382 | * We can't defer this to vmx_prepare_switch_to_host() since that |
11383 | * function may be executed in interrupt context, which saves and | |
11384 | * restore segments around it, nullifying its effect. | |
aa67f609 AK |
11385 | */ |
11386 | loadsegment(ds, __USER_DS); | |
11387 | loadsegment(es, __USER_DS); | |
11388 | #endif | |
11389 | ||
6de4f3ad | 11390 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
6de12732 | 11391 | | (1 << VCPU_EXREG_RFLAGS) |
aff48baa | 11392 | | (1 << VCPU_EXREG_PDPTR) |
2fb92db1 | 11393 | | (1 << VCPU_EXREG_SEGMENTS) |
aff48baa | 11394 | | (1 << VCPU_EXREG_CR3)); |
5fdbf976 MT |
11395 | vcpu->arch.regs_dirty = 0; |
11396 | ||
1be0e61c XG |
11397 | /* |
11398 | * eager fpu is enabled if PKEY is supported and CR4 is switched | |
11399 | * back on host, so it is safe to read guest PKRU from current | |
11400 | * XSAVE. | |
11401 | */ | |
b9dd21e1 PB |
11402 | if (static_cpu_has(X86_FEATURE_PKU) && |
11403 | kvm_read_cr4_bits(vcpu, X86_CR4_PKE)) { | |
11404 | vcpu->arch.pkru = __read_pkru(); | |
11405 | if (vcpu->arch.pkru != vmx->host_pkru) | |
1be0e61c | 11406 | __write_pkru(vmx->host_pkru); |
1be0e61c XG |
11407 | } |
11408 | ||
e0b890d3 | 11409 | vmx->nested.nested_run_pending = 0; |
b060ca3b JM |
11410 | vmx->idt_vectoring_info = 0; |
11411 | ||
11412 | vmx->exit_reason = vmx->fail ? 0xdead : vmcs_read32(VM_EXIT_REASON); | |
11413 | if (vmx->fail || (vmx->exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) | |
11414 | return; | |
11415 | ||
11416 | vmx->loaded_vmcs->launched = 1; | |
11417 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); | |
e0b890d3 | 11418 | |
51aa01d1 AK |
11419 | vmx_complete_atomic_exit(vmx); |
11420 | vmx_recover_nmi_blocking(vmx); | |
cf393f75 | 11421 | vmx_complete_interrupts(vmx); |
6aa8b732 | 11422 | } |
c207aee4 | 11423 | STACK_FRAME_NON_STANDARD(vmx_vcpu_run); |
6aa8b732 | 11424 | |
434a1e94 SC |
11425 | static struct kvm *vmx_vm_alloc(void) |
11426 | { | |
d1e5b0e9 | 11427 | struct kvm_vmx *kvm_vmx = vzalloc(sizeof(struct kvm_vmx)); |
40bbb9d0 | 11428 | return &kvm_vmx->kvm; |
434a1e94 SC |
11429 | } |
11430 | ||
11431 | static void vmx_vm_free(struct kvm *kvm) | |
11432 | { | |
d1e5b0e9 | 11433 | vfree(to_kvm_vmx(kvm)); |
434a1e94 SC |
11434 | } |
11435 | ||
1279a6b1 | 11436 | static void vmx_switch_vmcs(struct kvm_vcpu *vcpu, struct loaded_vmcs *vmcs) |
4fa7734c PB |
11437 | { |
11438 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
11439 | int cpu; | |
11440 | ||
1279a6b1 | 11441 | if (vmx->loaded_vmcs == vmcs) |
4fa7734c PB |
11442 | return; |
11443 | ||
11444 | cpu = get_cpu(); | |
4fa7734c | 11445 | vmx_vcpu_put(vcpu); |
bd9966de | 11446 | vmx->loaded_vmcs = vmcs; |
4fa7734c | 11447 | vmx_vcpu_load(vcpu, cpu); |
4fa7734c | 11448 | put_cpu(); |
b7031fd4 SC |
11449 | |
11450 | vm_entry_controls_reset_shadow(vmx); | |
11451 | vm_exit_controls_reset_shadow(vmx); | |
11452 | vmx_segment_cache_clear(vmx); | |
4fa7734c PB |
11453 | } |
11454 | ||
2f1fe811 JM |
11455 | /* |
11456 | * Ensure that the current vmcs of the logical processor is the | |
11457 | * vmcs01 of the vcpu before calling free_nested(). | |
11458 | */ | |
11459 | static void vmx_free_vcpu_nested(struct kvm_vcpu *vcpu) | |
11460 | { | |
14c07ad8 VK |
11461 | vcpu_load(vcpu); |
11462 | vmx_switch_vmcs(vcpu, &to_vmx(vcpu)->vmcs01); | |
11463 | free_nested(vcpu); | |
11464 | vcpu_put(vcpu); | |
2f1fe811 JM |
11465 | } |
11466 | ||
6aa8b732 AK |
11467 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
11468 | { | |
fb3f0f51 RR |
11469 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
11470 | ||
843e4330 | 11471 | if (enable_pml) |
a3eaa864 | 11472 | vmx_destroy_pml_buffer(vmx); |
991e7a0e | 11473 | free_vpid(vmx->vpid); |
4fa7734c | 11474 | leave_guest_mode(vcpu); |
2f1fe811 | 11475 | vmx_free_vcpu_nested(vcpu); |
4fa7734c | 11476 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 RR |
11477 | kfree(vmx->guest_msrs); |
11478 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 11479 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
11480 | } |
11481 | ||
fb3f0f51 | 11482 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 11483 | { |
fb3f0f51 | 11484 | int err; |
c16f862d | 11485 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
904e14fb | 11486 | unsigned long *msr_bitmap; |
15ad7146 | 11487 | int cpu; |
6aa8b732 | 11488 | |
a2fa3e9f | 11489 | if (!vmx) |
fb3f0f51 RR |
11490 | return ERR_PTR(-ENOMEM); |
11491 | ||
991e7a0e | 11492 | vmx->vpid = allocate_vpid(); |
2384d2b3 | 11493 | |
fb3f0f51 RR |
11494 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
11495 | if (err) | |
11496 | goto free_vcpu; | |
965b58a5 | 11497 | |
4e59516a PF |
11498 | err = -ENOMEM; |
11499 | ||
11500 | /* | |
11501 | * If PML is turned on, failure on enabling PML just results in failure | |
11502 | * of creating the vcpu, therefore we can simplify PML logic (by | |
11503 | * avoiding dealing with cases, such as enabling PML partially on vcpus | |
11504 | * for the guest, etc. | |
11505 | */ | |
11506 | if (enable_pml) { | |
11507 | vmx->pml_pg = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
11508 | if (!vmx->pml_pg) | |
11509 | goto uninit_vcpu; | |
11510 | } | |
11511 | ||
a2fa3e9f | 11512 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
03916db9 PB |
11513 | BUILD_BUG_ON(ARRAY_SIZE(vmx_msr_index) * sizeof(vmx->guest_msrs[0]) |
11514 | > PAGE_SIZE); | |
0123be42 | 11515 | |
4e59516a PF |
11516 | if (!vmx->guest_msrs) |
11517 | goto free_pml; | |
965b58a5 | 11518 | |
f21f165e PB |
11519 | err = alloc_loaded_vmcs(&vmx->vmcs01); |
11520 | if (err < 0) | |
fb3f0f51 | 11521 | goto free_msrs; |
a2fa3e9f | 11522 | |
904e14fb PB |
11523 | msr_bitmap = vmx->vmcs01.msr_bitmap; |
11524 | vmx_disable_intercept_for_msr(msr_bitmap, MSR_FS_BASE, MSR_TYPE_RW); | |
11525 | vmx_disable_intercept_for_msr(msr_bitmap, MSR_GS_BASE, MSR_TYPE_RW); | |
11526 | vmx_disable_intercept_for_msr(msr_bitmap, MSR_KERNEL_GS_BASE, MSR_TYPE_RW); | |
11527 | vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_SYSENTER_CS, MSR_TYPE_RW); | |
11528 | vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_SYSENTER_ESP, MSR_TYPE_RW); | |
11529 | vmx_disable_intercept_for_msr(msr_bitmap, MSR_IA32_SYSENTER_EIP, MSR_TYPE_RW); | |
11530 | vmx->msr_bitmap_mode = 0; | |
11531 | ||
f21f165e | 11532 | vmx->loaded_vmcs = &vmx->vmcs01; |
15ad7146 AK |
11533 | cpu = get_cpu(); |
11534 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
e48672fa | 11535 | vmx->vcpu.cpu = cpu; |
12d79917 | 11536 | vmx_vcpu_setup(vmx); |
fb3f0f51 | 11537 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 11538 | put_cpu(); |
35754c98 | 11539 | if (cpu_need_virtualize_apic_accesses(&vmx->vcpu)) { |
be6d05cf JK |
11540 | err = alloc_apic_access_page(kvm); |
11541 | if (err) | |
5e4a0b3c | 11542 | goto free_vmcs; |
a63cb560 | 11543 | } |
fb3f0f51 | 11544 | |
e90008df | 11545 | if (enable_ept && !enable_unrestricted_guest) { |
f51770ed TC |
11546 | err = init_rmode_identity_map(kvm); |
11547 | if (err) | |
93ea5388 | 11548 | goto free_vmcs; |
b927a3ce | 11549 | } |
b7ebfb05 | 11550 | |
63aff655 | 11551 | if (nested) |
6677f3da PB |
11552 | nested_vmx_setup_ctls_msrs(&vmx->nested.msrs, |
11553 | kvm_vcpu_apicv_active(&vmx->vcpu)); | |
b9c237bb | 11554 | |
705699a1 | 11555 | vmx->nested.posted_intr_nv = -1; |
a9d30f33 | 11556 | vmx->nested.current_vmptr = -1ull; |
a9d30f33 | 11557 | |
37e4c997 HZ |
11558 | vmx->msr_ia32_feature_control_valid_bits = FEATURE_CONTROL_LOCKED; |
11559 | ||
31afb2ea PB |
11560 | /* |
11561 | * Enforce invariant: pi_desc.nv is always either POSTED_INTR_VECTOR | |
11562 | * or POSTED_INTR_WAKEUP_VECTOR. | |
11563 | */ | |
11564 | vmx->pi_desc.nv = POSTED_INTR_VECTOR; | |
11565 | vmx->pi_desc.sn = 1; | |
11566 | ||
fb3f0f51 RR |
11567 | return &vmx->vcpu; |
11568 | ||
11569 | free_vmcs: | |
5f3fbc34 | 11570 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 | 11571 | free_msrs: |
fb3f0f51 | 11572 | kfree(vmx->guest_msrs); |
4e59516a PF |
11573 | free_pml: |
11574 | vmx_destroy_pml_buffer(vmx); | |
fb3f0f51 RR |
11575 | uninit_vcpu: |
11576 | kvm_vcpu_uninit(&vmx->vcpu); | |
11577 | free_vcpu: | |
991e7a0e | 11578 | free_vpid(vmx->vpid); |
a4770347 | 11579 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 11580 | return ERR_PTR(err); |
6aa8b732 AK |
11581 | } |
11582 | ||
d90a7a0e JK |
11583 | #define L1TF_MSG_SMT "L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details.\n" |
11584 | #define L1TF_MSG_L1D "L1TF CPU bug present and virtualization mitigation disabled, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details.\n" | |
26acfb66 | 11585 | |
b31c114b WL |
11586 | static int vmx_vm_init(struct kvm *kvm) |
11587 | { | |
877ad952 TL |
11588 | spin_lock_init(&to_kvm_vmx(kvm)->ept_pointer_lock); |
11589 | ||
b31c114b WL |
11590 | if (!ple_gap) |
11591 | kvm->arch.pause_in_guest = true; | |
26acfb66 | 11592 | |
d90a7a0e JK |
11593 | if (boot_cpu_has(X86_BUG_L1TF) && enable_ept) { |
11594 | switch (l1tf_mitigation) { | |
11595 | case L1TF_MITIGATION_OFF: | |
11596 | case L1TF_MITIGATION_FLUSH_NOWARN: | |
11597 | /* 'I explicitly don't care' is set */ | |
11598 | break; | |
11599 | case L1TF_MITIGATION_FLUSH: | |
11600 | case L1TF_MITIGATION_FLUSH_NOSMT: | |
11601 | case L1TF_MITIGATION_FULL: | |
11602 | /* | |
11603 | * Warn upon starting the first VM in a potentially | |
11604 | * insecure environment. | |
11605 | */ | |
11606 | if (cpu_smt_control == CPU_SMT_ENABLED) | |
11607 | pr_warn_once(L1TF_MSG_SMT); | |
11608 | if (l1tf_vmx_mitigation == VMENTER_L1D_FLUSH_NEVER) | |
11609 | pr_warn_once(L1TF_MSG_L1D); | |
11610 | break; | |
11611 | case L1TF_MITIGATION_FULL_FORCE: | |
11612 | /* Flush is enforced */ | |
11613 | break; | |
26acfb66 | 11614 | } |
26acfb66 | 11615 | } |
b31c114b WL |
11616 | return 0; |
11617 | } | |
11618 | ||
002c7f7c YS |
11619 | static void __init vmx_check_processor_compat(void *rtn) |
11620 | { | |
11621 | struct vmcs_config vmcs_conf; | |
11622 | ||
11623 | *(int *)rtn = 0; | |
11624 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
11625 | *(int *)rtn = -EIO; | |
1389309c | 11626 | nested_vmx_setup_ctls_msrs(&vmcs_conf.nested, enable_apicv); |
002c7f7c YS |
11627 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { |
11628 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
11629 | smp_processor_id()); | |
11630 | *(int *)rtn = -EIO; | |
11631 | } | |
11632 | } | |
11633 | ||
4b12f0de | 11634 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 11635 | { |
b18d5431 XG |
11636 | u8 cache; |
11637 | u64 ipat = 0; | |
4b12f0de | 11638 | |
522c68c4 | 11639 | /* For VT-d and EPT combination |
606decd6 | 11640 | * 1. MMIO: always map as UC |
522c68c4 SY |
11641 | * 2. EPT with VT-d: |
11642 | * a. VT-d without snooping control feature: can't guarantee the | |
606decd6 | 11643 | * result, try to trust guest. |
522c68c4 SY |
11644 | * b. VT-d with snooping control feature: snooping control feature of |
11645 | * VT-d engine can guarantee the cache correctness. Just set it | |
11646 | * to WB to keep consistent with host. So the same as item 3. | |
a19a6d11 | 11647 | * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep |
522c68c4 SY |
11648 | * consistent with host MTRR |
11649 | */ | |
606decd6 PB |
11650 | if (is_mmio) { |
11651 | cache = MTRR_TYPE_UNCACHABLE; | |
11652 | goto exit; | |
11653 | } | |
11654 | ||
11655 | if (!kvm_arch_has_noncoherent_dma(vcpu->kvm)) { | |
b18d5431 XG |
11656 | ipat = VMX_EPT_IPAT_BIT; |
11657 | cache = MTRR_TYPE_WRBACK; | |
11658 | goto exit; | |
11659 | } | |
11660 | ||
11661 | if (kvm_read_cr0(vcpu) & X86_CR0_CD) { | |
11662 | ipat = VMX_EPT_IPAT_BIT; | |
0da029ed | 11663 | if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_CD_NW_CLEARED)) |
fb279950 XG |
11664 | cache = MTRR_TYPE_WRBACK; |
11665 | else | |
11666 | cache = MTRR_TYPE_UNCACHABLE; | |
b18d5431 XG |
11667 | goto exit; |
11668 | } | |
11669 | ||
ff53604b | 11670 | cache = kvm_mtrr_get_guest_memory_type(vcpu, gfn); |
b18d5431 XG |
11671 | |
11672 | exit: | |
11673 | return (cache << VMX_EPT_MT_EPTE_SHIFT) | ipat; | |
64d4d521 SY |
11674 | } |
11675 | ||
17cc3935 | 11676 | static int vmx_get_lpage_level(void) |
344f414f | 11677 | { |
878403b7 SY |
11678 | if (enable_ept && !cpu_has_vmx_ept_1g_page()) |
11679 | return PT_DIRECTORY_LEVEL; | |
11680 | else | |
11681 | /* For shadow and EPT supported 1GB page */ | |
11682 | return PT_PDPE_LEVEL; | |
344f414f JR |
11683 | } |
11684 | ||
feda805f XG |
11685 | static void vmcs_set_secondary_exec_control(u32 new_ctl) |
11686 | { | |
11687 | /* | |
11688 | * These bits in the secondary execution controls field | |
11689 | * are dynamic, the others are mostly based on the hypervisor | |
11690 | * architecture and the guest's CPUID. Do not touch the | |
11691 | * dynamic bits. | |
11692 | */ | |
11693 | u32 mask = | |
11694 | SECONDARY_EXEC_SHADOW_VMCS | | |
11695 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | | |
0367f205 PB |
11696 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
11697 | SECONDARY_EXEC_DESC; | |
feda805f XG |
11698 | |
11699 | u32 cur_ctl = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
11700 | ||
11701 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
11702 | (new_ctl & ~mask) | (cur_ctl & mask)); | |
11703 | } | |
11704 | ||
8322ebbb DM |
11705 | /* |
11706 | * Generate MSR_IA32_VMX_CR{0,4}_FIXED1 according to CPUID. Only set bits | |
11707 | * (indicating "allowed-1") if they are supported in the guest's CPUID. | |
11708 | */ | |
11709 | static void nested_vmx_cr_fixed1_bits_update(struct kvm_vcpu *vcpu) | |
11710 | { | |
11711 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
11712 | struct kvm_cpuid_entry2 *entry; | |
11713 | ||
6677f3da PB |
11714 | vmx->nested.msrs.cr0_fixed1 = 0xffffffff; |
11715 | vmx->nested.msrs.cr4_fixed1 = X86_CR4_PCE; | |
8322ebbb DM |
11716 | |
11717 | #define cr4_fixed1_update(_cr4_mask, _reg, _cpuid_mask) do { \ | |
11718 | if (entry && (entry->_reg & (_cpuid_mask))) \ | |
6677f3da | 11719 | vmx->nested.msrs.cr4_fixed1 |= (_cr4_mask); \ |
8322ebbb DM |
11720 | } while (0) |
11721 | ||
11722 | entry = kvm_find_cpuid_entry(vcpu, 0x1, 0); | |
11723 | cr4_fixed1_update(X86_CR4_VME, edx, bit(X86_FEATURE_VME)); | |
11724 | cr4_fixed1_update(X86_CR4_PVI, edx, bit(X86_FEATURE_VME)); | |
11725 | cr4_fixed1_update(X86_CR4_TSD, edx, bit(X86_FEATURE_TSC)); | |
11726 | cr4_fixed1_update(X86_CR4_DE, edx, bit(X86_FEATURE_DE)); | |
11727 | cr4_fixed1_update(X86_CR4_PSE, edx, bit(X86_FEATURE_PSE)); | |
11728 | cr4_fixed1_update(X86_CR4_PAE, edx, bit(X86_FEATURE_PAE)); | |
11729 | cr4_fixed1_update(X86_CR4_MCE, edx, bit(X86_FEATURE_MCE)); | |
11730 | cr4_fixed1_update(X86_CR4_PGE, edx, bit(X86_FEATURE_PGE)); | |
11731 | cr4_fixed1_update(X86_CR4_OSFXSR, edx, bit(X86_FEATURE_FXSR)); | |
11732 | cr4_fixed1_update(X86_CR4_OSXMMEXCPT, edx, bit(X86_FEATURE_XMM)); | |
11733 | cr4_fixed1_update(X86_CR4_VMXE, ecx, bit(X86_FEATURE_VMX)); | |
11734 | cr4_fixed1_update(X86_CR4_SMXE, ecx, bit(X86_FEATURE_SMX)); | |
11735 | cr4_fixed1_update(X86_CR4_PCIDE, ecx, bit(X86_FEATURE_PCID)); | |
11736 | cr4_fixed1_update(X86_CR4_OSXSAVE, ecx, bit(X86_FEATURE_XSAVE)); | |
11737 | ||
11738 | entry = kvm_find_cpuid_entry(vcpu, 0x7, 0); | |
11739 | cr4_fixed1_update(X86_CR4_FSGSBASE, ebx, bit(X86_FEATURE_FSGSBASE)); | |
11740 | cr4_fixed1_update(X86_CR4_SMEP, ebx, bit(X86_FEATURE_SMEP)); | |
11741 | cr4_fixed1_update(X86_CR4_SMAP, ebx, bit(X86_FEATURE_SMAP)); | |
11742 | cr4_fixed1_update(X86_CR4_PKE, ecx, bit(X86_FEATURE_PKU)); | |
c4ad77e0 | 11743 | cr4_fixed1_update(X86_CR4_UMIP, ecx, bit(X86_FEATURE_UMIP)); |
8322ebbb DM |
11744 | |
11745 | #undef cr4_fixed1_update | |
11746 | } | |
11747 | ||
5f76f6f5 LA |
11748 | static void nested_vmx_entry_exit_ctls_update(struct kvm_vcpu *vcpu) |
11749 | { | |
11750 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
11751 | ||
11752 | if (kvm_mpx_supported()) { | |
11753 | bool mpx_enabled = guest_cpuid_has(vcpu, X86_FEATURE_MPX); | |
11754 | ||
11755 | if (mpx_enabled) { | |
11756 | vmx->nested.msrs.entry_ctls_high |= VM_ENTRY_LOAD_BNDCFGS; | |
11757 | vmx->nested.msrs.exit_ctls_high |= VM_EXIT_CLEAR_BNDCFGS; | |
11758 | } else { | |
11759 | vmx->nested.msrs.entry_ctls_high &= ~VM_ENTRY_LOAD_BNDCFGS; | |
11760 | vmx->nested.msrs.exit_ctls_high &= ~VM_EXIT_CLEAR_BNDCFGS; | |
11761 | } | |
11762 | } | |
11763 | } | |
11764 | ||
0e851880 SY |
11765 | static void vmx_cpuid_update(struct kvm_vcpu *vcpu) |
11766 | { | |
4e47c7a6 | 11767 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4e47c7a6 | 11768 | |
80154d77 PB |
11769 | if (cpu_has_secondary_exec_ctrls()) { |
11770 | vmx_compute_secondary_exec_control(vmx); | |
11771 | vmcs_set_secondary_exec_control(vmx->secondary_exec_control); | |
ad756a16 | 11772 | } |
8b3e34e4 | 11773 | |
37e4c997 HZ |
11774 | if (nested_vmx_allowed(vcpu)) |
11775 | to_vmx(vcpu)->msr_ia32_feature_control_valid_bits |= | |
11776 | FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
11777 | else | |
11778 | to_vmx(vcpu)->msr_ia32_feature_control_valid_bits &= | |
11779 | ~FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
8322ebbb | 11780 | |
5f76f6f5 | 11781 | if (nested_vmx_allowed(vcpu)) { |
8322ebbb | 11782 | nested_vmx_cr_fixed1_bits_update(vcpu); |
5f76f6f5 LA |
11783 | nested_vmx_entry_exit_ctls_update(vcpu); |
11784 | } | |
0e851880 SY |
11785 | } |
11786 | ||
d4330ef2 JR |
11787 | static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
11788 | { | |
7b8050f5 NHE |
11789 | if (func == 1 && nested) |
11790 | entry->ecx |= bit(X86_FEATURE_VMX); | |
d4330ef2 JR |
11791 | } |
11792 | ||
25d92081 YZ |
11793 | static void nested_ept_inject_page_fault(struct kvm_vcpu *vcpu, |
11794 | struct x86_exception *fault) | |
11795 | { | |
533558bc | 11796 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
c5f983f6 | 11797 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
533558bc | 11798 | u32 exit_reason; |
c5f983f6 | 11799 | unsigned long exit_qualification = vcpu->arch.exit_qualification; |
25d92081 | 11800 | |
c5f983f6 BD |
11801 | if (vmx->nested.pml_full) { |
11802 | exit_reason = EXIT_REASON_PML_FULL; | |
11803 | vmx->nested.pml_full = false; | |
11804 | exit_qualification &= INTR_INFO_UNBLOCK_NMI; | |
11805 | } else if (fault->error_code & PFERR_RSVD_MASK) | |
533558bc | 11806 | exit_reason = EXIT_REASON_EPT_MISCONFIG; |
25d92081 | 11807 | else |
533558bc | 11808 | exit_reason = EXIT_REASON_EPT_VIOLATION; |
c5f983f6 BD |
11809 | |
11810 | nested_vmx_vmexit(vcpu, exit_reason, 0, exit_qualification); | |
25d92081 YZ |
11811 | vmcs12->guest_physical_address = fault->address; |
11812 | } | |
11813 | ||
995f00a6 PF |
11814 | static bool nested_ept_ad_enabled(struct kvm_vcpu *vcpu) |
11815 | { | |
bb97a016 | 11816 | return nested_ept_get_cr3(vcpu) & VMX_EPTP_AD_ENABLE_BIT; |
995f00a6 PF |
11817 | } |
11818 | ||
155a97a3 NHE |
11819 | /* Callbacks for nested_ept_init_mmu_context: */ |
11820 | ||
11821 | static unsigned long nested_ept_get_cr3(struct kvm_vcpu *vcpu) | |
11822 | { | |
11823 | /* return the page table to be shadowed - in our case, EPT12 */ | |
11824 | return get_vmcs12(vcpu)->ept_pointer; | |
11825 | } | |
11826 | ||
5b8ba41d | 11827 | static void nested_ept_init_mmu_context(struct kvm_vcpu *vcpu) |
155a97a3 | 11828 | { |
ad896af0 | 11829 | WARN_ON(mmu_is_nested(vcpu)); |
ae1e2d10 | 11830 | |
14c07ad8 | 11831 | vcpu->arch.mmu = &vcpu->arch.guest_mmu; |
ad896af0 | 11832 | kvm_init_shadow_ept_mmu(vcpu, |
6677f3da | 11833 | to_vmx(vcpu)->nested.msrs.ept_caps & |
ae1e2d10 | 11834 | VMX_EPT_EXECUTE_ONLY_BIT, |
50c28f21 JS |
11835 | nested_ept_ad_enabled(vcpu), |
11836 | nested_ept_get_cr3(vcpu)); | |
44dd3ffa VK |
11837 | vcpu->arch.mmu->set_cr3 = vmx_set_cr3; |
11838 | vcpu->arch.mmu->get_cr3 = nested_ept_get_cr3; | |
11839 | vcpu->arch.mmu->inject_page_fault = nested_ept_inject_page_fault; | |
3dc773e7 | 11840 | vcpu->arch.mmu->get_pdptr = kvm_pdptr_read; |
155a97a3 NHE |
11841 | |
11842 | vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu; | |
155a97a3 NHE |
11843 | } |
11844 | ||
11845 | static void nested_ept_uninit_mmu_context(struct kvm_vcpu *vcpu) | |
11846 | { | |
14c07ad8 | 11847 | vcpu->arch.mmu = &vcpu->arch.root_mmu; |
44dd3ffa | 11848 | vcpu->arch.walk_mmu = &vcpu->arch.root_mmu; |
155a97a3 NHE |
11849 | } |
11850 | ||
19d5f10b EK |
11851 | static bool nested_vmx_is_page_fault_vmexit(struct vmcs12 *vmcs12, |
11852 | u16 error_code) | |
11853 | { | |
11854 | bool inequality, bit; | |
11855 | ||
11856 | bit = (vmcs12->exception_bitmap & (1u << PF_VECTOR)) != 0; | |
11857 | inequality = | |
11858 | (error_code & vmcs12->page_fault_error_code_mask) != | |
11859 | vmcs12->page_fault_error_code_match; | |
11860 | return inequality ^ bit; | |
11861 | } | |
11862 | ||
feaf0c7d GN |
11863 | static void vmx_inject_page_fault_nested(struct kvm_vcpu *vcpu, |
11864 | struct x86_exception *fault) | |
11865 | { | |
11866 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
11867 | ||
11868 | WARN_ON(!is_guest_mode(vcpu)); | |
11869 | ||
305d0ab4 WL |
11870 | if (nested_vmx_is_page_fault_vmexit(vmcs12, fault->error_code) && |
11871 | !to_vmx(vcpu)->nested.nested_run_pending) { | |
b96fb439 PB |
11872 | vmcs12->vm_exit_intr_error_code = fault->error_code; |
11873 | nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, | |
11874 | PF_VECTOR | INTR_TYPE_HARD_EXCEPTION | | |
11875 | INTR_INFO_DELIVER_CODE_MASK | INTR_INFO_VALID_MASK, | |
11876 | fault->address); | |
7313c698 | 11877 | } else { |
feaf0c7d | 11878 | kvm_inject_page_fault(vcpu, fault); |
7313c698 | 11879 | } |
feaf0c7d GN |
11880 | } |
11881 | ||
c992384b PB |
11882 | static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, |
11883 | struct vmcs12 *vmcs12); | |
6beb7bd5 | 11884 | |
7f7f1ba3 | 11885 | static void nested_get_vmcs12_pages(struct kvm_vcpu *vcpu) |
a2bcba50 | 11886 | { |
7f7f1ba3 | 11887 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
a2bcba50 | 11888 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
5e2f30b7 | 11889 | struct page *page; |
6beb7bd5 | 11890 | u64 hpa; |
a2bcba50 WL |
11891 | |
11892 | if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { | |
a2bcba50 WL |
11893 | /* |
11894 | * Translate L1 physical address to host physical | |
11895 | * address for vmcs02. Keep the page pinned, so this | |
11896 | * physical address remains valid. We keep a reference | |
11897 | * to it so we can release it later. | |
11898 | */ | |
5e2f30b7 | 11899 | if (vmx->nested.apic_access_page) { /* shouldn't happen */ |
53a70daf | 11900 | kvm_release_page_dirty(vmx->nested.apic_access_page); |
5e2f30b7 DH |
11901 | vmx->nested.apic_access_page = NULL; |
11902 | } | |
11903 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->apic_access_addr); | |
6beb7bd5 JM |
11904 | /* |
11905 | * If translation failed, no matter: This feature asks | |
11906 | * to exit when accessing the given address, and if it | |
11907 | * can never be accessed, this feature won't do | |
11908 | * anything anyway. | |
11909 | */ | |
5e2f30b7 DH |
11910 | if (!is_error_page(page)) { |
11911 | vmx->nested.apic_access_page = page; | |
6beb7bd5 JM |
11912 | hpa = page_to_phys(vmx->nested.apic_access_page); |
11913 | vmcs_write64(APIC_ACCESS_ADDR, hpa); | |
11914 | } else { | |
11915 | vmcs_clear_bits(SECONDARY_VM_EXEC_CONTROL, | |
11916 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); | |
11917 | } | |
a2bcba50 | 11918 | } |
a7c0b07d WL |
11919 | |
11920 | if (nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) { | |
5e2f30b7 | 11921 | if (vmx->nested.virtual_apic_page) { /* shouldn't happen */ |
53a70daf | 11922 | kvm_release_page_dirty(vmx->nested.virtual_apic_page); |
5e2f30b7 DH |
11923 | vmx->nested.virtual_apic_page = NULL; |
11924 | } | |
11925 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->virtual_apic_page_addr); | |
a7c0b07d WL |
11926 | |
11927 | /* | |
6beb7bd5 JM |
11928 | * If translation failed, VM entry will fail because |
11929 | * prepare_vmcs02 set VIRTUAL_APIC_PAGE_ADDR to -1ull. | |
11930 | * Failing the vm entry is _not_ what the processor | |
11931 | * does but it's basically the only possibility we | |
11932 | * have. We could still enter the guest if CR8 load | |
11933 | * exits are enabled, CR8 store exits are enabled, and | |
11934 | * virtualize APIC access is disabled; in this case | |
11935 | * the processor would never use the TPR shadow and we | |
11936 | * could simply clear the bit from the execution | |
11937 | * control. But such a configuration is useless, so | |
11938 | * let's keep the code simple. | |
a7c0b07d | 11939 | */ |
5e2f30b7 DH |
11940 | if (!is_error_page(page)) { |
11941 | vmx->nested.virtual_apic_page = page; | |
6beb7bd5 JM |
11942 | hpa = page_to_phys(vmx->nested.virtual_apic_page); |
11943 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, hpa); | |
11944 | } | |
a7c0b07d WL |
11945 | } |
11946 | ||
705699a1 | 11947 | if (nested_cpu_has_posted_intr(vmcs12)) { |
705699a1 WV |
11948 | if (vmx->nested.pi_desc_page) { /* shouldn't happen */ |
11949 | kunmap(vmx->nested.pi_desc_page); | |
53a70daf | 11950 | kvm_release_page_dirty(vmx->nested.pi_desc_page); |
5e2f30b7 | 11951 | vmx->nested.pi_desc_page = NULL; |
705699a1 | 11952 | } |
5e2f30b7 DH |
11953 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->posted_intr_desc_addr); |
11954 | if (is_error_page(page)) | |
6beb7bd5 | 11955 | return; |
5e2f30b7 DH |
11956 | vmx->nested.pi_desc_page = page; |
11957 | vmx->nested.pi_desc = kmap(vmx->nested.pi_desc_page); | |
705699a1 WV |
11958 | vmx->nested.pi_desc = |
11959 | (struct pi_desc *)((void *)vmx->nested.pi_desc + | |
11960 | (unsigned long)(vmcs12->posted_intr_desc_addr & | |
11961 | (PAGE_SIZE - 1))); | |
6beb7bd5 JM |
11962 | vmcs_write64(POSTED_INTR_DESC_ADDR, |
11963 | page_to_phys(vmx->nested.pi_desc_page) + | |
11964 | (unsigned long)(vmcs12->posted_intr_desc_addr & | |
11965 | (PAGE_SIZE - 1))); | |
705699a1 | 11966 | } |
d4667ca1 | 11967 | if (nested_vmx_prepare_msr_bitmap(vcpu, vmcs12)) |
3712caeb KA |
11968 | vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL, |
11969 | CPU_BASED_USE_MSR_BITMAPS); | |
6beb7bd5 JM |
11970 | else |
11971 | vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL, | |
11972 | CPU_BASED_USE_MSR_BITMAPS); | |
a2bcba50 WL |
11973 | } |
11974 | ||
f4124500 JK |
11975 | static void vmx_start_preemption_timer(struct kvm_vcpu *vcpu) |
11976 | { | |
11977 | u64 preemption_timeout = get_vmcs12(vcpu)->vmx_preemption_timer_value; | |
11978 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
11979 | ||
4c008127 SC |
11980 | /* |
11981 | * A timer value of zero is architecturally guaranteed to cause | |
11982 | * a VMExit prior to executing any instructions in the guest. | |
11983 | */ | |
11984 | if (preemption_timeout == 0) { | |
f4124500 JK |
11985 | vmx_preemption_timer_fn(&vmx->nested.preemption_timer); |
11986 | return; | |
11987 | } | |
11988 | ||
4c008127 SC |
11989 | if (vcpu->arch.virtual_tsc_khz == 0) |
11990 | return; | |
11991 | ||
f4124500 JK |
11992 | preemption_timeout <<= VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE; |
11993 | preemption_timeout *= 1000000; | |
11994 | do_div(preemption_timeout, vcpu->arch.virtual_tsc_khz); | |
11995 | hrtimer_start(&vmx->nested.preemption_timer, | |
11996 | ns_to_ktime(preemption_timeout), HRTIMER_MODE_REL); | |
11997 | } | |
11998 | ||
56a20510 JM |
11999 | static int nested_vmx_check_io_bitmap_controls(struct kvm_vcpu *vcpu, |
12000 | struct vmcs12 *vmcs12) | |
12001 | { | |
12002 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) | |
12003 | return 0; | |
12004 | ||
12005 | if (!page_address_valid(vcpu, vmcs12->io_bitmap_a) || | |
12006 | !page_address_valid(vcpu, vmcs12->io_bitmap_b)) | |
12007 | return -EINVAL; | |
12008 | ||
12009 | return 0; | |
12010 | } | |
12011 | ||
3af18d9c WV |
12012 | static int nested_vmx_check_msr_bitmap_controls(struct kvm_vcpu *vcpu, |
12013 | struct vmcs12 *vmcs12) | |
12014 | { | |
3af18d9c WV |
12015 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS)) |
12016 | return 0; | |
12017 | ||
5fa99cbe | 12018 | if (!page_address_valid(vcpu, vmcs12->msr_bitmap)) |
3af18d9c WV |
12019 | return -EINVAL; |
12020 | ||
12021 | return 0; | |
12022 | } | |
12023 | ||
712b12d7 JM |
12024 | static int nested_vmx_check_tpr_shadow_controls(struct kvm_vcpu *vcpu, |
12025 | struct vmcs12 *vmcs12) | |
12026 | { | |
12027 | if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) | |
12028 | return 0; | |
12029 | ||
12030 | if (!page_address_valid(vcpu, vmcs12->virtual_apic_page_addr)) | |
12031 | return -EINVAL; | |
12032 | ||
12033 | return 0; | |
12034 | } | |
12035 | ||
3af18d9c WV |
12036 | /* |
12037 | * Merge L0's and L1's MSR bitmap, return false to indicate that | |
12038 | * we do not use the hardware. | |
12039 | */ | |
c992384b PB |
12040 | static inline bool nested_vmx_prepare_msr_bitmap(struct kvm_vcpu *vcpu, |
12041 | struct vmcs12 *vmcs12) | |
3af18d9c | 12042 | { |
82f0dd4b | 12043 | int msr; |
f2b93280 | 12044 | struct page *page; |
d048c098 | 12045 | unsigned long *msr_bitmap_l1; |
904e14fb | 12046 | unsigned long *msr_bitmap_l0 = to_vmx(vcpu)->nested.vmcs02.msr_bitmap; |
15d45071 | 12047 | /* |
d28b387f | 12048 | * pred_cmd & spec_ctrl are trying to verify two things: |
15d45071 AR |
12049 | * |
12050 | * 1. L0 gave a permission to L1 to actually passthrough the MSR. This | |
12051 | * ensures that we do not accidentally generate an L02 MSR bitmap | |
12052 | * from the L12 MSR bitmap that is too permissive. | |
12053 | * 2. That L1 or L2s have actually used the MSR. This avoids | |
12054 | * unnecessarily merging of the bitmap if the MSR is unused. This | |
12055 | * works properly because we only update the L01 MSR bitmap lazily. | |
12056 | * So even if L0 should pass L1 these MSRs, the L01 bitmap is only | |
12057 | * updated to reflect this when L1 (or its L2s) actually write to | |
12058 | * the MSR. | |
12059 | */ | |
206587a9 KA |
12060 | bool pred_cmd = !msr_write_intercepted_l01(vcpu, MSR_IA32_PRED_CMD); |
12061 | bool spec_ctrl = !msr_write_intercepted_l01(vcpu, MSR_IA32_SPEC_CTRL); | |
f2b93280 | 12062 | |
c992384b PB |
12063 | /* Nothing to do if the MSR bitmap is not in use. */ |
12064 | if (!cpu_has_vmx_msr_bitmap() || | |
12065 | !nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS)) | |
12066 | return false; | |
12067 | ||
15d45071 | 12068 | if (!nested_cpu_has_virt_x2apic_mode(vmcs12) && |
d28b387f | 12069 | !pred_cmd && !spec_ctrl) |
f2b93280 WV |
12070 | return false; |
12071 | ||
5e2f30b7 DH |
12072 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->msr_bitmap); |
12073 | if (is_error_page(page)) | |
f2b93280 | 12074 | return false; |
f2b93280 | 12075 | |
c992384b PB |
12076 | msr_bitmap_l1 = (unsigned long *)kmap(page); |
12077 | if (nested_cpu_has_apic_reg_virt(vmcs12)) { | |
12078 | /* | |
12079 | * L0 need not intercept reads for MSRs between 0x800 and 0x8ff, it | |
12080 | * just lets the processor take the value from the virtual-APIC page; | |
12081 | * take those 256 bits directly from the L1 bitmap. | |
12082 | */ | |
12083 | for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) { | |
12084 | unsigned word = msr / BITS_PER_LONG; | |
12085 | msr_bitmap_l0[word] = msr_bitmap_l1[word]; | |
12086 | msr_bitmap_l0[word + (0x800 / sizeof(long))] = ~0; | |
12087 | } | |
12088 | } else { | |
12089 | for (msr = 0x800; msr <= 0x8ff; msr += BITS_PER_LONG) { | |
12090 | unsigned word = msr / BITS_PER_LONG; | |
12091 | msr_bitmap_l0[word] = ~0; | |
12092 | msr_bitmap_l0[word + (0x800 / sizeof(long))] = ~0; | |
12093 | } | |
12094 | } | |
d048c098 | 12095 | |
c992384b PB |
12096 | nested_vmx_disable_intercept_for_msr( |
12097 | msr_bitmap_l1, msr_bitmap_l0, | |
d7231e75 | 12098 | X2APIC_MSR(APIC_TASKPRI), |
c992384b | 12099 | MSR_TYPE_W); |
d048c098 | 12100 | |
c992384b | 12101 | if (nested_cpu_has_vid(vmcs12)) { |
d048c098 | 12102 | nested_vmx_disable_intercept_for_msr( |
c992384b | 12103 | msr_bitmap_l1, msr_bitmap_l0, |
d7231e75 | 12104 | X2APIC_MSR(APIC_EOI), |
c992384b PB |
12105 | MSR_TYPE_W); |
12106 | nested_vmx_disable_intercept_for_msr( | |
12107 | msr_bitmap_l1, msr_bitmap_l0, | |
d7231e75 | 12108 | X2APIC_MSR(APIC_SELF_IPI), |
c992384b | 12109 | MSR_TYPE_W); |
82f0dd4b | 12110 | } |
15d45071 | 12111 | |
d28b387f KA |
12112 | if (spec_ctrl) |
12113 | nested_vmx_disable_intercept_for_msr( | |
12114 | msr_bitmap_l1, msr_bitmap_l0, | |
12115 | MSR_IA32_SPEC_CTRL, | |
12116 | MSR_TYPE_R | MSR_TYPE_W); | |
12117 | ||
15d45071 AR |
12118 | if (pred_cmd) |
12119 | nested_vmx_disable_intercept_for_msr( | |
12120 | msr_bitmap_l1, msr_bitmap_l0, | |
12121 | MSR_IA32_PRED_CMD, | |
12122 | MSR_TYPE_W); | |
12123 | ||
f2b93280 | 12124 | kunmap(page); |
53a70daf | 12125 | kvm_release_page_clean(page); |
f2b93280 WV |
12126 | |
12127 | return true; | |
12128 | } | |
12129 | ||
61ada748 LA |
12130 | static void nested_cache_shadow_vmcs12(struct kvm_vcpu *vcpu, |
12131 | struct vmcs12 *vmcs12) | |
12132 | { | |
12133 | struct vmcs12 *shadow; | |
12134 | struct page *page; | |
12135 | ||
12136 | if (!nested_cpu_has_shadow_vmcs(vmcs12) || | |
12137 | vmcs12->vmcs_link_pointer == -1ull) | |
12138 | return; | |
12139 | ||
12140 | shadow = get_shadow_vmcs12(vcpu); | |
12141 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->vmcs_link_pointer); | |
12142 | ||
12143 | memcpy(shadow, kmap(page), VMCS12_SIZE); | |
12144 | ||
12145 | kunmap(page); | |
12146 | kvm_release_page_clean(page); | |
12147 | } | |
12148 | ||
12149 | static void nested_flush_cached_shadow_vmcs12(struct kvm_vcpu *vcpu, | |
12150 | struct vmcs12 *vmcs12) | |
12151 | { | |
12152 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
12153 | ||
12154 | if (!nested_cpu_has_shadow_vmcs(vmcs12) || | |
12155 | vmcs12->vmcs_link_pointer == -1ull) | |
12156 | return; | |
12157 | ||
12158 | kvm_write_guest(vmx->vcpu.kvm, vmcs12->vmcs_link_pointer, | |
12159 | get_shadow_vmcs12(vcpu), VMCS12_SIZE); | |
12160 | } | |
12161 | ||
f0f4cf5b KS |
12162 | static int nested_vmx_check_apic_access_controls(struct kvm_vcpu *vcpu, |
12163 | struct vmcs12 *vmcs12) | |
12164 | { | |
12165 | if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) && | |
12166 | !page_address_valid(vcpu, vmcs12->apic_access_addr)) | |
12167 | return -EINVAL; | |
12168 | else | |
12169 | return 0; | |
12170 | } | |
12171 | ||
f2b93280 WV |
12172 | static int nested_vmx_check_apicv_controls(struct kvm_vcpu *vcpu, |
12173 | struct vmcs12 *vmcs12) | |
12174 | { | |
82f0dd4b | 12175 | if (!nested_cpu_has_virt_x2apic_mode(vmcs12) && |
608406e2 | 12176 | !nested_cpu_has_apic_reg_virt(vmcs12) && |
705699a1 WV |
12177 | !nested_cpu_has_vid(vmcs12) && |
12178 | !nested_cpu_has_posted_intr(vmcs12)) | |
f2b93280 WV |
12179 | return 0; |
12180 | ||
12181 | /* | |
12182 | * If virtualize x2apic mode is enabled, | |
12183 | * virtualize apic access must be disabled. | |
12184 | */ | |
82f0dd4b WV |
12185 | if (nested_cpu_has_virt_x2apic_mode(vmcs12) && |
12186 | nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
f2b93280 WV |
12187 | return -EINVAL; |
12188 | ||
608406e2 WV |
12189 | /* |
12190 | * If virtual interrupt delivery is enabled, | |
12191 | * we must exit on external interrupts. | |
12192 | */ | |
12193 | if (nested_cpu_has_vid(vmcs12) && | |
12194 | !nested_exit_on_intr(vcpu)) | |
12195 | return -EINVAL; | |
12196 | ||
705699a1 WV |
12197 | /* |
12198 | * bits 15:8 should be zero in posted_intr_nv, | |
12199 | * the descriptor address has been already checked | |
12200 | * in nested_get_vmcs12_pages. | |
6de84e58 KS |
12201 | * |
12202 | * bits 5:0 of posted_intr_desc_addr should be zero. | |
705699a1 WV |
12203 | */ |
12204 | if (nested_cpu_has_posted_intr(vmcs12) && | |
12205 | (!nested_cpu_has_vid(vmcs12) || | |
12206 | !nested_exit_intr_ack_set(vcpu) || | |
6de84e58 KS |
12207 | (vmcs12->posted_intr_nv & 0xff00) || |
12208 | (vmcs12->posted_intr_desc_addr & 0x3f) || | |
12209 | (!page_address_valid(vcpu, vmcs12->posted_intr_desc_addr)))) | |
705699a1 WV |
12210 | return -EINVAL; |
12211 | ||
f2b93280 WV |
12212 | /* tpr shadow is needed by all apicv features. */ |
12213 | if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) | |
12214 | return -EINVAL; | |
12215 | ||
12216 | return 0; | |
3af18d9c WV |
12217 | } |
12218 | ||
e9ac033e EK |
12219 | static int nested_vmx_check_msr_switch(struct kvm_vcpu *vcpu, |
12220 | unsigned long count_field, | |
92d71bc6 | 12221 | unsigned long addr_field) |
ff651cb6 | 12222 | { |
e2536742 | 12223 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
92d71bc6 | 12224 | int maxphyaddr; |
e9ac033e EK |
12225 | u64 count, addr; |
12226 | ||
e2536742 LA |
12227 | if (vmcs12_read_any(vmcs12, count_field, &count) || |
12228 | vmcs12_read_any(vmcs12, addr_field, &addr)) { | |
e9ac033e EK |
12229 | WARN_ON(1); |
12230 | return -EINVAL; | |
12231 | } | |
12232 | if (count == 0) | |
12233 | return 0; | |
92d71bc6 | 12234 | maxphyaddr = cpuid_maxphyaddr(vcpu); |
e9ac033e EK |
12235 | if (!IS_ALIGNED(addr, 16) || addr >> maxphyaddr || |
12236 | (addr + count * sizeof(struct vmx_msr_entry) - 1) >> maxphyaddr) { | |
bbe41b95 | 12237 | pr_debug_ratelimited( |
e9ac033e EK |
12238 | "nVMX: invalid MSR switch (0x%lx, %d, %llu, 0x%08llx)", |
12239 | addr_field, maxphyaddr, count, addr); | |
12240 | return -EINVAL; | |
12241 | } | |
12242 | return 0; | |
12243 | } | |
12244 | ||
12245 | static int nested_vmx_check_msr_switch_controls(struct kvm_vcpu *vcpu, | |
12246 | struct vmcs12 *vmcs12) | |
12247 | { | |
e9ac033e EK |
12248 | if (vmcs12->vm_exit_msr_load_count == 0 && |
12249 | vmcs12->vm_exit_msr_store_count == 0 && | |
12250 | vmcs12->vm_entry_msr_load_count == 0) | |
12251 | return 0; /* Fast path */ | |
e9ac033e | 12252 | if (nested_vmx_check_msr_switch(vcpu, VM_EXIT_MSR_LOAD_COUNT, |
92d71bc6 | 12253 | VM_EXIT_MSR_LOAD_ADDR) || |
e9ac033e | 12254 | nested_vmx_check_msr_switch(vcpu, VM_EXIT_MSR_STORE_COUNT, |
92d71bc6 | 12255 | VM_EXIT_MSR_STORE_ADDR) || |
e9ac033e | 12256 | nested_vmx_check_msr_switch(vcpu, VM_ENTRY_MSR_LOAD_COUNT, |
92d71bc6 | 12257 | VM_ENTRY_MSR_LOAD_ADDR)) |
e9ac033e EK |
12258 | return -EINVAL; |
12259 | return 0; | |
12260 | } | |
12261 | ||
c5f983f6 BD |
12262 | static int nested_vmx_check_pml_controls(struct kvm_vcpu *vcpu, |
12263 | struct vmcs12 *vmcs12) | |
12264 | { | |
55c1dcd8 KS |
12265 | if (!nested_cpu_has_pml(vmcs12)) |
12266 | return 0; | |
c5f983f6 | 12267 | |
55c1dcd8 KS |
12268 | if (!nested_cpu_has_ept(vmcs12) || |
12269 | !page_address_valid(vcpu, vmcs12->pml_address)) | |
12270 | return -EINVAL; | |
c5f983f6 BD |
12271 | |
12272 | return 0; | |
12273 | } | |
12274 | ||
a8a7c02b LA |
12275 | static int nested_vmx_check_shadow_vmcs_controls(struct kvm_vcpu *vcpu, |
12276 | struct vmcs12 *vmcs12) | |
12277 | { | |
12278 | if (!nested_cpu_has_shadow_vmcs(vmcs12)) | |
12279 | return 0; | |
12280 | ||
12281 | if (!page_address_valid(vcpu, vmcs12->vmread_bitmap) || | |
12282 | !page_address_valid(vcpu, vmcs12->vmwrite_bitmap)) | |
12283 | return -EINVAL; | |
12284 | ||
12285 | return 0; | |
12286 | } | |
12287 | ||
e9ac033e EK |
12288 | static int nested_vmx_msr_check_common(struct kvm_vcpu *vcpu, |
12289 | struct vmx_msr_entry *e) | |
12290 | { | |
12291 | /* x2APIC MSR accesses are not allowed */ | |
8a9781f7 | 12292 | if (vcpu->arch.apic_base & X2APIC_ENABLE && e->index >> 8 == 0x8) |
e9ac033e EK |
12293 | return -EINVAL; |
12294 | if (e->index == MSR_IA32_UCODE_WRITE || /* SDM Table 35-2 */ | |
12295 | e->index == MSR_IA32_UCODE_REV) | |
12296 | return -EINVAL; | |
12297 | if (e->reserved != 0) | |
ff651cb6 WV |
12298 | return -EINVAL; |
12299 | return 0; | |
12300 | } | |
12301 | ||
e9ac033e EK |
12302 | static int nested_vmx_load_msr_check(struct kvm_vcpu *vcpu, |
12303 | struct vmx_msr_entry *e) | |
ff651cb6 WV |
12304 | { |
12305 | if (e->index == MSR_FS_BASE || | |
12306 | e->index == MSR_GS_BASE || | |
e9ac033e EK |
12307 | e->index == MSR_IA32_SMM_MONITOR_CTL || /* SMM is not supported */ |
12308 | nested_vmx_msr_check_common(vcpu, e)) | |
12309 | return -EINVAL; | |
12310 | return 0; | |
12311 | } | |
12312 | ||
12313 | static int nested_vmx_store_msr_check(struct kvm_vcpu *vcpu, | |
12314 | struct vmx_msr_entry *e) | |
12315 | { | |
12316 | if (e->index == MSR_IA32_SMBASE || /* SMM is not supported */ | |
12317 | nested_vmx_msr_check_common(vcpu, e)) | |
ff651cb6 WV |
12318 | return -EINVAL; |
12319 | return 0; | |
12320 | } | |
12321 | ||
12322 | /* | |
12323 | * Load guest's/host's msr at nested entry/exit. | |
12324 | * return 0 for success, entry index for failure. | |
12325 | */ | |
12326 | static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) | |
12327 | { | |
12328 | u32 i; | |
12329 | struct vmx_msr_entry e; | |
12330 | struct msr_data msr; | |
12331 | ||
12332 | msr.host_initiated = false; | |
12333 | for (i = 0; i < count; i++) { | |
54bf36aa PB |
12334 | if (kvm_vcpu_read_guest(vcpu, gpa + i * sizeof(e), |
12335 | &e, sizeof(e))) { | |
bbe41b95 | 12336 | pr_debug_ratelimited( |
e9ac033e EK |
12337 | "%s cannot read MSR entry (%u, 0x%08llx)\n", |
12338 | __func__, i, gpa + i * sizeof(e)); | |
ff651cb6 | 12339 | goto fail; |
e9ac033e EK |
12340 | } |
12341 | if (nested_vmx_load_msr_check(vcpu, &e)) { | |
bbe41b95 | 12342 | pr_debug_ratelimited( |
e9ac033e EK |
12343 | "%s check failed (%u, 0x%x, 0x%x)\n", |
12344 | __func__, i, e.index, e.reserved); | |
12345 | goto fail; | |
12346 | } | |
ff651cb6 WV |
12347 | msr.index = e.index; |
12348 | msr.data = e.value; | |
e9ac033e | 12349 | if (kvm_set_msr(vcpu, &msr)) { |
bbe41b95 | 12350 | pr_debug_ratelimited( |
e9ac033e EK |
12351 | "%s cannot write MSR (%u, 0x%x, 0x%llx)\n", |
12352 | __func__, i, e.index, e.value); | |
ff651cb6 | 12353 | goto fail; |
e9ac033e | 12354 | } |
ff651cb6 WV |
12355 | } |
12356 | return 0; | |
12357 | fail: | |
12358 | return i + 1; | |
12359 | } | |
12360 | ||
12361 | static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) | |
12362 | { | |
12363 | u32 i; | |
12364 | struct vmx_msr_entry e; | |
12365 | ||
12366 | for (i = 0; i < count; i++) { | |
609e36d3 | 12367 | struct msr_data msr_info; |
54bf36aa PB |
12368 | if (kvm_vcpu_read_guest(vcpu, |
12369 | gpa + i * sizeof(e), | |
12370 | &e, 2 * sizeof(u32))) { | |
bbe41b95 | 12371 | pr_debug_ratelimited( |
e9ac033e EK |
12372 | "%s cannot read MSR entry (%u, 0x%08llx)\n", |
12373 | __func__, i, gpa + i * sizeof(e)); | |
ff651cb6 | 12374 | return -EINVAL; |
e9ac033e EK |
12375 | } |
12376 | if (nested_vmx_store_msr_check(vcpu, &e)) { | |
bbe41b95 | 12377 | pr_debug_ratelimited( |
e9ac033e EK |
12378 | "%s check failed (%u, 0x%x, 0x%x)\n", |
12379 | __func__, i, e.index, e.reserved); | |
ff651cb6 | 12380 | return -EINVAL; |
e9ac033e | 12381 | } |
609e36d3 PB |
12382 | msr_info.host_initiated = false; |
12383 | msr_info.index = e.index; | |
12384 | if (kvm_get_msr(vcpu, &msr_info)) { | |
bbe41b95 | 12385 | pr_debug_ratelimited( |
e9ac033e EK |
12386 | "%s cannot read MSR (%u, 0x%x)\n", |
12387 | __func__, i, e.index); | |
12388 | return -EINVAL; | |
12389 | } | |
54bf36aa PB |
12390 | if (kvm_vcpu_write_guest(vcpu, |
12391 | gpa + i * sizeof(e) + | |
12392 | offsetof(struct vmx_msr_entry, value), | |
12393 | &msr_info.data, sizeof(msr_info.data))) { | |
bbe41b95 | 12394 | pr_debug_ratelimited( |
e9ac033e | 12395 | "%s cannot write MSR (%u, 0x%x, 0x%llx)\n", |
609e36d3 | 12396 | __func__, i, e.index, msr_info.data); |
e9ac033e EK |
12397 | return -EINVAL; |
12398 | } | |
ff651cb6 WV |
12399 | } |
12400 | return 0; | |
12401 | } | |
12402 | ||
1dc35dac LP |
12403 | static bool nested_cr3_valid(struct kvm_vcpu *vcpu, unsigned long val) |
12404 | { | |
12405 | unsigned long invalid_mask; | |
12406 | ||
12407 | invalid_mask = (~0ULL) << cpuid_maxphyaddr(vcpu); | |
12408 | return (val & invalid_mask) == 0; | |
12409 | } | |
12410 | ||
9ed38ffa LP |
12411 | /* |
12412 | * Load guest's/host's cr3 at nested entry/exit. nested_ept is true if we are | |
12413 | * emulating VM entry into a guest with EPT enabled. | |
12414 | * Returns 0 on success, 1 on failure. Invalid state exit qualification code | |
12415 | * is assigned to entry_failure_code on failure. | |
12416 | */ | |
12417 | static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, bool nested_ept, | |
ca0bde28 | 12418 | u32 *entry_failure_code) |
9ed38ffa | 12419 | { |
9ed38ffa | 12420 | if (cr3 != kvm_read_cr3(vcpu) || (!nested_ept && pdptrs_changed(vcpu))) { |
1dc35dac | 12421 | if (!nested_cr3_valid(vcpu, cr3)) { |
9ed38ffa LP |
12422 | *entry_failure_code = ENTRY_FAIL_DEFAULT; |
12423 | return 1; | |
12424 | } | |
12425 | ||
12426 | /* | |
12427 | * If PAE paging and EPT are both on, CR3 is not used by the CPU and | |
12428 | * must not be dereferenced. | |
12429 | */ | |
12430 | if (!is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu) && | |
12431 | !nested_ept) { | |
12432 | if (!load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) { | |
12433 | *entry_failure_code = ENTRY_FAIL_PDPTE; | |
12434 | return 1; | |
12435 | } | |
12436 | } | |
9ed38ffa LP |
12437 | } |
12438 | ||
50c28f21 | 12439 | if (!nested_ept) |
ade61e28 | 12440 | kvm_mmu_new_cr3(vcpu, cr3, false); |
50c28f21 JS |
12441 | |
12442 | vcpu->arch.cr3 = cr3; | |
12443 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
12444 | ||
12445 | kvm_init_mmu(vcpu, false); | |
12446 | ||
9ed38ffa LP |
12447 | return 0; |
12448 | } | |
12449 | ||
efebf0aa LA |
12450 | /* |
12451 | * Returns if KVM is able to config CPU to tag TLB entries | |
12452 | * populated by L2 differently than TLB entries populated | |
12453 | * by L1. | |
12454 | * | |
12455 | * If L1 uses EPT, then TLB entries are tagged with different EPTP. | |
12456 | * | |
12457 | * If L1 uses VPID and we allocated a vpid02, TLB entries are tagged | |
12458 | * with different VPID (L1 entries are tagged with vmx->vpid | |
12459 | * while L2 entries are tagged with vmx->nested.vpid02). | |
12460 | */ | |
12461 | static bool nested_has_guest_tlb_tag(struct kvm_vcpu *vcpu) | |
12462 | { | |
12463 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
12464 | ||
12465 | return nested_cpu_has_ept(vmcs12) || | |
12466 | (nested_cpu_has_vpid(vmcs12) && to_vmx(vcpu)->nested.vpid02); | |
12467 | } | |
12468 | ||
3df5c37e SC |
12469 | static u64 nested_vmx_calc_efer(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) |
12470 | { | |
12471 | if (vmx->nested.nested_run_pending && | |
12472 | (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER)) | |
12473 | return vmcs12->guest_ia32_efer; | |
12474 | else if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) | |
12475 | return vmx->vcpu.arch.efer | (EFER_LMA | EFER_LME); | |
12476 | else | |
12477 | return vmx->vcpu.arch.efer & ~(EFER_LMA | EFER_LME); | |
12478 | } | |
12479 | ||
09abe320 | 12480 | static void prepare_vmcs02_constant_state(struct vcpu_vmx *vmx) |
fe3ef05c | 12481 | { |
09abe320 | 12482 | /* |
9d6105b2 | 12483 | * If vmcs02 hasn't been initialized, set the constant vmcs02 state |
09abe320 SC |
12484 | * according to L0's settings (vmcs12 is irrelevant here). Host |
12485 | * fields that come from L0 and are not constant, e.g. HOST_CR3, | |
12486 | * will be set as needed prior to VMLAUNCH/VMRESUME. | |
12487 | */ | |
9d6105b2 | 12488 | if (vmx->nested.vmcs02_initialized) |
09abe320 | 12489 | return; |
9d6105b2 | 12490 | vmx->nested.vmcs02_initialized = true; |
09abe320 | 12491 | |
52017608 SC |
12492 | /* |
12493 | * We don't care what the EPTP value is we just need to guarantee | |
12494 | * it's valid so we don't get a false positive when doing early | |
12495 | * consistency checks. | |
12496 | */ | |
12497 | if (enable_ept && nested_early_check) | |
12498 | vmcs_write64(EPT_POINTER, construct_eptp(&vmx->vcpu, 0)); | |
12499 | ||
09abe320 SC |
12500 | /* All VMFUNCs are currently emulated through L0 vmexits. */ |
12501 | if (cpu_has_vmx_vmfunc()) | |
12502 | vmcs_write64(VM_FUNCTION_CONTROL, 0); | |
12503 | ||
12504 | if (cpu_has_vmx_posted_intr()) | |
12505 | vmcs_write16(POSTED_INTR_NV, POSTED_INTR_NESTED_VECTOR); | |
12506 | ||
12507 | if (cpu_has_vmx_msr_bitmap()) | |
12508 | vmcs_write64(MSR_BITMAP, __pa(vmx->nested.vmcs02.msr_bitmap)); | |
12509 | ||
12510 | if (enable_pml) | |
12511 | vmcs_write64(PML_ADDRESS, page_to_phys(vmx->pml_pg)); | |
12512 | ||
12513 | /* | |
12514 | * Set the MSR load/store lists to match L0's settings. Only the | |
12515 | * addresses are constant (for vmcs02), the counts can change based | |
12516 | * on L2's behavior, e.g. switching to/from long mode. | |
12517 | */ | |
12518 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); | |
12519 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host.val)); | |
12520 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest.val)); | |
12521 | ||
12522 | vmx_set_constant_host_state(vmx); | |
12523 | } | |
12524 | ||
12525 | static void prepare_vmcs02_early_full(struct vcpu_vmx *vmx, | |
12526 | struct vmcs12 *vmcs12) | |
12527 | { | |
12528 | prepare_vmcs02_constant_state(vmx); | |
12529 | ||
12530 | vmcs_write64(VMCS_LINK_POINTER, -1ull); | |
12531 | ||
12532 | if (enable_vpid) { | |
12533 | if (nested_cpu_has_vpid(vmcs12) && vmx->nested.vpid02) | |
12534 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->nested.vpid02); | |
12535 | else | |
12536 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
12537 | } | |
12538 | } | |
12539 | ||
12540 | static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) | |
12541 | { | |
12542 | u32 exec_control, vmcs12_exec_ctrl; | |
12543 | u64 guest_efer = nested_vmx_calc_efer(vmx, vmcs12); | |
12544 | ||
945679e3 | 12545 | if (vmx->nested.dirty_vmcs12 || vmx->nested.hv_evmcs) |
09abe320 SC |
12546 | prepare_vmcs02_early_full(vmx, vmcs12); |
12547 | ||
12548 | /* | |
12549 | * HOST_RSP is normally set correctly in vmx_vcpu_run() just before | |
12550 | * entry, but only if the current (host) sp changed from the value | |
12551 | * we wrote last (vmx->host_rsp). This cache is no longer relevant | |
12552 | * if we switch vmcs, and rather than hold a separate cache per vmcs, | |
52017608 SC |
12553 | * here we just force the write to happen on entry. host_rsp will |
12554 | * also be written unconditionally by nested_vmx_check_vmentry_hw() | |
12555 | * if we are doing early consistency checks via hardware. | |
09abe320 SC |
12556 | */ |
12557 | vmx->host_rsp = 0; | |
12558 | ||
12559 | /* | |
12560 | * PIN CONTROLS | |
12561 | */ | |
12562 | exec_control = vmcs12->pin_based_vm_exec_control; | |
12563 | ||
12564 | /* Preemption timer setting is computed directly in vmx_vcpu_run. */ | |
12565 | exec_control |= vmcs_config.pin_based_exec_ctrl; | |
12566 | exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER; | |
12567 | vmx->loaded_vmcs->hv_timer_armed = false; | |
12568 | ||
12569 | /* Posted interrupts setting is only taken from vmcs12. */ | |
12570 | if (nested_cpu_has_posted_intr(vmcs12)) { | |
12571 | vmx->nested.posted_intr_nv = vmcs12->posted_intr_nv; | |
12572 | vmx->nested.pi_pending = false; | |
12573 | } else { | |
12574 | exec_control &= ~PIN_BASED_POSTED_INTR; | |
12575 | } | |
12576 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, exec_control); | |
12577 | ||
12578 | /* | |
12579 | * EXEC CONTROLS | |
12580 | */ | |
12581 | exec_control = vmx_exec_control(vmx); /* L0's desires */ | |
12582 | exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
12583 | exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
12584 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
12585 | exec_control |= vmcs12->cpu_based_vm_exec_control; | |
12586 | ||
12587 | /* | |
12588 | * Write an illegal value to VIRTUAL_APIC_PAGE_ADDR. Later, if | |
12589 | * nested_get_vmcs12_pages can't fix it up, the illegal value | |
12590 | * will result in a VM entry failure. | |
12591 | */ | |
12592 | if (exec_control & CPU_BASED_TPR_SHADOW) { | |
12593 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, -1ull); | |
12594 | vmcs_write32(TPR_THRESHOLD, vmcs12->tpr_threshold); | |
12595 | } else { | |
12596 | #ifdef CONFIG_X86_64 | |
12597 | exec_control |= CPU_BASED_CR8_LOAD_EXITING | | |
12598 | CPU_BASED_CR8_STORE_EXITING; | |
12599 | #endif | |
12600 | } | |
12601 | ||
12602 | /* | |
12603 | * A vmexit (to either L1 hypervisor or L0 userspace) is always needed | |
12604 | * for I/O port accesses. | |
12605 | */ | |
12606 | exec_control &= ~CPU_BASED_USE_IO_BITMAPS; | |
12607 | exec_control |= CPU_BASED_UNCOND_IO_EXITING; | |
12608 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); | |
12609 | ||
12610 | /* | |
12611 | * SECONDARY EXEC CONTROLS | |
12612 | */ | |
12613 | if (cpu_has_secondary_exec_ctrls()) { | |
12614 | exec_control = vmx->secondary_exec_control; | |
12615 | ||
12616 | /* Take the following fields only from vmcs12 */ | |
12617 | exec_control &= ~(SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
12618 | SECONDARY_EXEC_ENABLE_INVPCID | | |
12619 | SECONDARY_EXEC_RDTSCP | | |
12620 | SECONDARY_EXEC_XSAVES | | |
12621 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | | |
12622 | SECONDARY_EXEC_APIC_REGISTER_VIRT | | |
12623 | SECONDARY_EXEC_ENABLE_VMFUNC); | |
12624 | if (nested_cpu_has(vmcs12, | |
12625 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)) { | |
12626 | vmcs12_exec_ctrl = vmcs12->secondary_vm_exec_control & | |
12627 | ~SECONDARY_EXEC_ENABLE_PML; | |
12628 | exec_control |= vmcs12_exec_ctrl; | |
12629 | } | |
12630 | ||
12631 | /* VMCS shadowing for L2 is emulated for now */ | |
12632 | exec_control &= ~SECONDARY_EXEC_SHADOW_VMCS; | |
12633 | ||
12634 | if (exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) | |
12635 | vmcs_write16(GUEST_INTR_STATUS, | |
12636 | vmcs12->guest_intr_status); | |
12637 | ||
12638 | /* | |
12639 | * Write an illegal value to APIC_ACCESS_ADDR. Later, | |
12640 | * nested_get_vmcs12_pages will either fix it up or | |
12641 | * remove the VM execution control. | |
12642 | */ | |
12643 | if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) | |
12644 | vmcs_write64(APIC_ACCESS_ADDR, -1ull); | |
12645 | ||
12646 | if (exec_control & SECONDARY_EXEC_ENCLS_EXITING) | |
12647 | vmcs_write64(ENCLS_EXITING_BITMAP, -1ull); | |
12648 | ||
12649 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); | |
12650 | } | |
12651 | ||
12652 | /* | |
12653 | * ENTRY CONTROLS | |
12654 | * | |
12655 | * vmcs12's VM_{ENTRY,EXIT}_LOAD_IA32_EFER and VM_ENTRY_IA32E_MODE | |
12656 | * are emulated by vmx_set_efer() in prepare_vmcs02(), but speculate | |
12657 | * on the related bits (if supported by the CPU) in the hope that | |
12658 | * we can avoid VMWrites during vmx_set_efer(). | |
12659 | */ | |
12660 | exec_control = (vmcs12->vm_entry_controls | vmcs_config.vmentry_ctrl) & | |
12661 | ~VM_ENTRY_IA32E_MODE & ~VM_ENTRY_LOAD_IA32_EFER; | |
12662 | if (cpu_has_load_ia32_efer) { | |
12663 | if (guest_efer & EFER_LMA) | |
12664 | exec_control |= VM_ENTRY_IA32E_MODE; | |
12665 | if (guest_efer != host_efer) | |
12666 | exec_control |= VM_ENTRY_LOAD_IA32_EFER; | |
12667 | } | |
12668 | vm_entry_controls_init(vmx, exec_control); | |
12669 | ||
12670 | /* | |
12671 | * EXIT CONTROLS | |
12672 | * | |
12673 | * L2->L1 exit controls are emulated - the hardware exit is to L0 so | |
12674 | * we should use its exit controls. Note that VM_EXIT_LOAD_IA32_EFER | |
12675 | * bits may be modified by vmx_set_efer() in prepare_vmcs02(). | |
12676 | */ | |
12677 | exec_control = vmcs_config.vmexit_ctrl; | |
12678 | if (cpu_has_load_ia32_efer && guest_efer != host_efer) | |
12679 | exec_control |= VM_EXIT_LOAD_IA32_EFER; | |
12680 | vm_exit_controls_init(vmx, exec_control); | |
12681 | ||
12682 | /* | |
12683 | * Conceptually we want to copy the PML address and index from | |
12684 | * vmcs01 here, and then back to vmcs01 on nested vmexit. But, | |
12685 | * since we always flush the log on each vmexit and never change | |
12686 | * the PML address (once set), this happens to be equivalent to | |
12687 | * simply resetting the index in vmcs02. | |
12688 | */ | |
12689 | if (enable_pml) | |
12690 | vmcs_write16(GUEST_PML_INDEX, PML_ENTITY_NUM - 1); | |
12691 | ||
12692 | /* | |
12693 | * Interrupt/Exception Fields | |
12694 | */ | |
12695 | if (vmx->nested.nested_run_pending) { | |
12696 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
12697 | vmcs12->vm_entry_intr_info_field); | |
12698 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, | |
12699 | vmcs12->vm_entry_exception_error_code); | |
12700 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
12701 | vmcs12->vm_entry_instruction_len); | |
12702 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, | |
12703 | vmcs12->guest_interruptibility_info); | |
12704 | vmx->loaded_vmcs->nmi_known_unmasked = | |
12705 | !(vmcs12->guest_interruptibility_info & GUEST_INTR_STATE_NMI); | |
12706 | } else { | |
12707 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
12708 | } | |
12709 | } | |
fe3ef05c | 12710 | |
09abe320 SC |
12711 | static void prepare_vmcs02_full(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) |
12712 | { | |
c4ebd629 VK |
12713 | struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs; |
12714 | ||
12715 | if (!hv_evmcs || !(hv_evmcs->hv_clean_fields & | |
12716 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) { | |
12717 | vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector); | |
12718 | vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector); | |
12719 | vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector); | |
12720 | vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector); | |
12721 | vmcs_write16(GUEST_GS_SELECTOR, vmcs12->guest_gs_selector); | |
12722 | vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector); | |
12723 | vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector); | |
12724 | vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit); | |
12725 | vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit); | |
12726 | vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit); | |
12727 | vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit); | |
12728 | vmcs_write32(GUEST_GS_LIMIT, vmcs12->guest_gs_limit); | |
12729 | vmcs_write32(GUEST_LDTR_LIMIT, vmcs12->guest_ldtr_limit); | |
12730 | vmcs_write32(GUEST_TR_LIMIT, vmcs12->guest_tr_limit); | |
12731 | vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit); | |
12732 | vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit); | |
12733 | vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes); | |
12734 | vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes); | |
12735 | vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes); | |
12736 | vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes); | |
12737 | vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes); | |
12738 | vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes); | |
12739 | vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes); | |
12740 | vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base); | |
12741 | vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base); | |
12742 | vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base); | |
12743 | vmcs_writel(GUEST_GS_BASE, vmcs12->guest_gs_base); | |
12744 | vmcs_writel(GUEST_LDTR_BASE, vmcs12->guest_ldtr_base); | |
12745 | vmcs_writel(GUEST_TR_BASE, vmcs12->guest_tr_base); | |
12746 | vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base); | |
12747 | vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base); | |
12748 | } | |
12749 | ||
12750 | if (!hv_evmcs || !(hv_evmcs->hv_clean_fields & | |
12751 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1)) { | |
12752 | vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs); | |
12753 | vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, | |
12754 | vmcs12->guest_pending_dbg_exceptions); | |
12755 | vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->guest_sysenter_esp); | |
12756 | vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->guest_sysenter_eip); | |
12757 | ||
12758 | /* | |
12759 | * L1 may access the L2's PDPTR, so save them to construct | |
12760 | * vmcs12 | |
12761 | */ | |
12762 | if (enable_ept) { | |
12763 | vmcs_write64(GUEST_PDPTR0, vmcs12->guest_pdptr0); | |
12764 | vmcs_write64(GUEST_PDPTR1, vmcs12->guest_pdptr1); | |
12765 | vmcs_write64(GUEST_PDPTR2, vmcs12->guest_pdptr2); | |
12766 | vmcs_write64(GUEST_PDPTR3, vmcs12->guest_pdptr3); | |
12767 | } | |
12768 | } | |
25a2e4fe PB |
12769 | |
12770 | if (nested_cpu_has_xsaves(vmcs12)) | |
12771 | vmcs_write64(XSS_EXIT_BITMAP, vmcs12->xss_exit_bitmap); | |
25a2e4fe PB |
12772 | |
12773 | /* | |
12774 | * Whether page-faults are trapped is determined by a combination of | |
12775 | * 3 settings: PFEC_MASK, PFEC_MATCH and EXCEPTION_BITMAP.PF. | |
12776 | * If enable_ept, L0 doesn't care about page faults and we should | |
12777 | * set all of these to L1's desires. However, if !enable_ept, L0 does | |
12778 | * care about (at least some) page faults, and because it is not easy | |
12779 | * (if at all possible?) to merge L0 and L1's desires, we simply ask | |
12780 | * to exit on each and every L2 page fault. This is done by setting | |
12781 | * MASK=MATCH=0 and (see below) EB.PF=1. | |
12782 | * Note that below we don't need special code to set EB.PF beyond the | |
12783 | * "or"ing of the EB of vmcs01 and vmcs12, because when enable_ept, | |
12784 | * vmcs01's EB.PF is 0 so the "or" will take vmcs12's value, and when | |
12785 | * !enable_ept, EB.PF is 1, so the "or" will always be 1. | |
12786 | */ | |
12787 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, | |
12788 | enable_ept ? vmcs12->page_fault_error_code_mask : 0); | |
12789 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, | |
12790 | enable_ept ? vmcs12->page_fault_error_code_match : 0); | |
12791 | ||
25a2e4fe PB |
12792 | if (cpu_has_vmx_apicv()) { |
12793 | vmcs_write64(EOI_EXIT_BITMAP0, vmcs12->eoi_exit_bitmap0); | |
12794 | vmcs_write64(EOI_EXIT_BITMAP1, vmcs12->eoi_exit_bitmap1); | |
12795 | vmcs_write64(EOI_EXIT_BITMAP2, vmcs12->eoi_exit_bitmap2); | |
12796 | vmcs_write64(EOI_EXIT_BITMAP3, vmcs12->eoi_exit_bitmap3); | |
12797 | } | |
12798 | ||
33966dd6 | 12799 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr); |
33966dd6 | 12800 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr); |
25a2e4fe PB |
12801 | |
12802 | set_cr4_guest_host_mask(vmx); | |
12803 | ||
62cf9bd8 LA |
12804 | if (kvm_mpx_supported()) { |
12805 | if (vmx->nested.nested_run_pending && | |
12806 | (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS)) | |
12807 | vmcs_write64(GUEST_BNDCFGS, vmcs12->guest_bndcfgs); | |
12808 | else | |
12809 | vmcs_write64(GUEST_BNDCFGS, vmx->nested.vmcs01_guest_bndcfgs); | |
12810 | } | |
8665c3f9 PB |
12811 | } |
12812 | ||
12813 | /* | |
12814 | * prepare_vmcs02 is called when the L1 guest hypervisor runs its nested | |
12815 | * L2 guest. L1 has a vmcs for L2 (vmcs12), and this function "merges" it | |
12816 | * with L0's requirements for its guest (a.k.a. vmcs01), so we can run the L2 | |
12817 | * guest in a way that will both be appropriate to L1's requests, and our | |
12818 | * needs. In addition to modifying the active vmcs (which is vmcs02), this | |
12819 | * function also has additional necessary side-effects, like setting various | |
12820 | * vcpu->arch fields. | |
12821 | * Returns 0 on success, 1 on failure. Invalid state exit qualification code | |
12822 | * is assigned to entry_failure_code on failure. | |
12823 | */ | |
12824 | static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, | |
6514dc38 | 12825 | u32 *entry_failure_code) |
8665c3f9 PB |
12826 | { |
12827 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
c4ebd629 | 12828 | struct hv_enlightened_vmcs *hv_evmcs = vmx->nested.hv_evmcs; |
8665c3f9 | 12829 | |
945679e3 | 12830 | if (vmx->nested.dirty_vmcs12 || vmx->nested.hv_evmcs) { |
09abe320 | 12831 | prepare_vmcs02_full(vmx, vmcs12); |
9d1887ef SC |
12832 | vmx->nested.dirty_vmcs12 = false; |
12833 | } | |
12834 | ||
8665c3f9 PB |
12835 | /* |
12836 | * First, the fields that are shadowed. This must be kept in sync | |
12837 | * with vmx_shadow_fields.h. | |
12838 | */ | |
c4ebd629 VK |
12839 | if (!hv_evmcs || !(hv_evmcs->hv_clean_fields & |
12840 | HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) { | |
12841 | vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector); | |
12842 | vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit); | |
12843 | vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes); | |
12844 | vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base); | |
12845 | vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base); | |
12846 | } | |
8665c3f9 | 12847 | |
6514dc38 | 12848 | if (vmx->nested.nested_run_pending && |
cf8b84f4 | 12849 | (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) { |
2996fca0 JK |
12850 | kvm_set_dr(vcpu, 7, vmcs12->guest_dr7); |
12851 | vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl); | |
12852 | } else { | |
12853 | kvm_set_dr(vcpu, 7, vcpu->arch.dr7); | |
12854 | vmcs_write64(GUEST_IA32_DEBUGCTL, vmx->nested.vmcs01_debugctl); | |
12855 | } | |
63fbf59f | 12856 | vmx_set_rflags(vcpu, vmcs12->guest_rflags); |
fe3ef05c | 12857 | |
f4124500 JK |
12858 | vmx->nested.preemption_timer_expired = false; |
12859 | if (nested_cpu_has_preemption_timer(vmcs12)) | |
12860 | vmx_start_preemption_timer(vcpu); | |
0238ea91 | 12861 | |
fe3ef05c NHE |
12862 | /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the |
12863 | * bitwise-or of what L1 wants to trap for L2, and what we want to | |
12864 | * trap. Note that CR0.TS also needs updating - we do this later. | |
12865 | */ | |
12866 | update_exception_bitmap(vcpu); | |
12867 | vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask; | |
12868 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
12869 | ||
6514dc38 | 12870 | if (vmx->nested.nested_run_pending && |
cf8b84f4 | 12871 | (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT)) { |
fe3ef05c | 12872 | vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat); |
44811c02 | 12873 | vcpu->arch.pat = vmcs12->guest_ia32_pat; |
cf8b84f4 | 12874 | } else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { |
fe3ef05c | 12875 | vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat); |
cf8b84f4 | 12876 | } |
fe3ef05c | 12877 | |
e79f245d KA |
12878 | vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset); |
12879 | ||
c95ba92a PF |
12880 | if (kvm_has_tsc_control) |
12881 | decache_tsc_multiplier(vmx); | |
fe3ef05c NHE |
12882 | |
12883 | if (enable_vpid) { | |
12884 | /* | |
5c614b35 WL |
12885 | * There is no direct mapping between vpid02 and vpid12, the |
12886 | * vpid02 is per-vCPU for L0 and reused while the value of | |
12887 | * vpid12 is changed w/ one invvpid during nested vmentry. | |
12888 | * The vpid12 is allocated by L1 for L2, so it will not | |
12889 | * influence global bitmap(for vpid01 and vpid02 allocation) | |
12890 | * even if spawn a lot of nested vCPUs. | |
fe3ef05c | 12891 | */ |
efebf0aa | 12892 | if (nested_cpu_has_vpid(vmcs12) && nested_has_guest_tlb_tag(vcpu)) { |
5c614b35 WL |
12893 | if (vmcs12->virtual_processor_id != vmx->nested.last_vpid) { |
12894 | vmx->nested.last_vpid = vmcs12->virtual_processor_id; | |
efebf0aa | 12895 | __vmx_flush_tlb(vcpu, nested_get_vpid02(vcpu), false); |
5c614b35 WL |
12896 | } |
12897 | } else { | |
1438921c LA |
12898 | /* |
12899 | * If L1 use EPT, then L0 needs to execute INVEPT on | |
12900 | * EPTP02 instead of EPTP01. Therefore, delay TLB | |
12901 | * flush until vmcs02->eptp is fully updated by | |
12902 | * KVM_REQ_LOAD_CR3. Note that this assumes | |
12903 | * KVM_REQ_TLB_FLUSH is evaluated after | |
12904 | * KVM_REQ_LOAD_CR3 in vcpu_enter_guest(). | |
12905 | */ | |
12906 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
5c614b35 | 12907 | } |
fe3ef05c NHE |
12908 | } |
12909 | ||
5b8ba41d SC |
12910 | if (nested_cpu_has_ept(vmcs12)) |
12911 | nested_ept_init_mmu_context(vcpu); | |
12912 | else if (nested_cpu_has2(vmcs12, | |
12913 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
a468f2db | 12914 | vmx_flush_tlb(vcpu, true); |
155a97a3 | 12915 | |
fe3ef05c | 12916 | /* |
bd7e5b08 PB |
12917 | * This sets GUEST_CR0 to vmcs12->guest_cr0, possibly modifying those |
12918 | * bits which we consider mandatory enabled. | |
fe3ef05c NHE |
12919 | * The CR0_READ_SHADOW is what L2 should have expected to read given |
12920 | * the specifications by L1; It's not enough to take | |
12921 | * vmcs12->cr0_read_shadow because on our cr0_guest_host_mask we we | |
12922 | * have more bits than L1 expected. | |
12923 | */ | |
12924 | vmx_set_cr0(vcpu, vmcs12->guest_cr0); | |
12925 | vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12)); | |
12926 | ||
12927 | vmx_set_cr4(vcpu, vmcs12->guest_cr4); | |
12928 | vmcs_writel(CR4_READ_SHADOW, nested_read_cr4(vmcs12)); | |
12929 | ||
09abe320 | 12930 | vcpu->arch.efer = nested_vmx_calc_efer(vmx, vmcs12); |
3df5c37e | 12931 | /* Note: may modify VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */ |
5a6a9748 DM |
12932 | vmx_set_efer(vcpu, vcpu->arch.efer); |
12933 | ||
2bb8cafe SC |
12934 | /* |
12935 | * Guest state is invalid and unrestricted guest is disabled, | |
12936 | * which means L1 attempted VMEntry to L2 with invalid state. | |
12937 | * Fail the VMEntry. | |
12938 | */ | |
3184a995 PB |
12939 | if (vmx->emulation_required) { |
12940 | *entry_failure_code = ENTRY_FAIL_DEFAULT; | |
2bb8cafe | 12941 | return 1; |
3184a995 | 12942 | } |
2bb8cafe | 12943 | |
9ed38ffa | 12944 | /* Shadow page tables on either EPT or shadow page tables. */ |
7ad658b6 | 12945 | if (nested_vmx_load_cr3(vcpu, vmcs12->guest_cr3, nested_cpu_has_ept(vmcs12), |
9ed38ffa LP |
12946 | entry_failure_code)) |
12947 | return 1; | |
7ca29de2 | 12948 | |
feaf0c7d GN |
12949 | if (!enable_ept) |
12950 | vcpu->arch.walk_mmu->inject_page_fault = vmx_inject_page_fault_nested; | |
12951 | ||
fe3ef05c NHE |
12952 | kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp); |
12953 | kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->guest_rip); | |
ee146c1c | 12954 | return 0; |
fe3ef05c NHE |
12955 | } |
12956 | ||
0c7f650e KS |
12957 | static int nested_vmx_check_nmi_controls(struct vmcs12 *vmcs12) |
12958 | { | |
12959 | if (!nested_cpu_has_nmi_exiting(vmcs12) && | |
12960 | nested_cpu_has_virtual_nmis(vmcs12)) | |
12961 | return -EINVAL; | |
12962 | ||
12963 | if (!nested_cpu_has_virtual_nmis(vmcs12) && | |
12964 | nested_cpu_has(vmcs12, CPU_BASED_VIRTUAL_NMI_PENDING)) | |
12965 | return -EINVAL; | |
12966 | ||
12967 | return 0; | |
12968 | } | |
12969 | ||
ca0bde28 | 12970 | static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) |
cd232ad0 | 12971 | { |
cd232ad0 | 12972 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
64a919f7 | 12973 | bool ia32e; |
7c177938 | 12974 | |
6dfacadd | 12975 | if (vmcs12->guest_activity_state != GUEST_ACTIVITY_ACTIVE && |
ca0bde28 JM |
12976 | vmcs12->guest_activity_state != GUEST_ACTIVITY_HLT) |
12977 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
26539bd0 | 12978 | |
ba8e23db KS |
12979 | if (nested_cpu_has_vpid(vmcs12) && !vmcs12->virtual_processor_id) |
12980 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
12981 | ||
56a20510 JM |
12982 | if (nested_vmx_check_io_bitmap_controls(vcpu, vmcs12)) |
12983 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
12984 | ||
ca0bde28 JM |
12985 | if (nested_vmx_check_msr_bitmap_controls(vcpu, vmcs12)) |
12986 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
7c177938 | 12987 | |
f0f4cf5b KS |
12988 | if (nested_vmx_check_apic_access_controls(vcpu, vmcs12)) |
12989 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
12990 | ||
712b12d7 JM |
12991 | if (nested_vmx_check_tpr_shadow_controls(vcpu, vmcs12)) |
12992 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
12993 | ||
ca0bde28 JM |
12994 | if (nested_vmx_check_apicv_controls(vcpu, vmcs12)) |
12995 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
f2b93280 | 12996 | |
ca0bde28 JM |
12997 | if (nested_vmx_check_msr_switch_controls(vcpu, vmcs12)) |
12998 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
e9ac033e | 12999 | |
c5f983f6 BD |
13000 | if (nested_vmx_check_pml_controls(vcpu, vmcs12)) |
13001 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13002 | ||
a8a7c02b LA |
13003 | if (nested_vmx_check_shadow_vmcs_controls(vcpu, vmcs12)) |
13004 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13005 | ||
7c177938 | 13006 | if (!vmx_control_verify(vmcs12->cpu_based_vm_exec_control, |
6677f3da PB |
13007 | vmx->nested.msrs.procbased_ctls_low, |
13008 | vmx->nested.msrs.procbased_ctls_high) || | |
2e5b0bd9 JM |
13009 | (nested_cpu_has(vmcs12, CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) && |
13010 | !vmx_control_verify(vmcs12->secondary_vm_exec_control, | |
6677f3da PB |
13011 | vmx->nested.msrs.secondary_ctls_low, |
13012 | vmx->nested.msrs.secondary_ctls_high)) || | |
7c177938 | 13013 | !vmx_control_verify(vmcs12->pin_based_vm_exec_control, |
6677f3da PB |
13014 | vmx->nested.msrs.pinbased_ctls_low, |
13015 | vmx->nested.msrs.pinbased_ctls_high) || | |
7c177938 | 13016 | !vmx_control_verify(vmcs12->vm_exit_controls, |
6677f3da PB |
13017 | vmx->nested.msrs.exit_ctls_low, |
13018 | vmx->nested.msrs.exit_ctls_high) || | |
7c177938 | 13019 | !vmx_control_verify(vmcs12->vm_entry_controls, |
6677f3da PB |
13020 | vmx->nested.msrs.entry_ctls_low, |
13021 | vmx->nested.msrs.entry_ctls_high)) | |
ca0bde28 | 13022 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; |
7c177938 | 13023 | |
0c7f650e | 13024 | if (nested_vmx_check_nmi_controls(vmcs12)) |
ca0bde28 | 13025 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; |
7c177938 | 13026 | |
41ab9372 BD |
13027 | if (nested_cpu_has_vmfunc(vmcs12)) { |
13028 | if (vmcs12->vm_function_control & | |
6677f3da | 13029 | ~vmx->nested.msrs.vmfunc_controls) |
41ab9372 BD |
13030 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; |
13031 | ||
13032 | if (nested_cpu_has_eptp_switching(vmcs12)) { | |
13033 | if (!nested_cpu_has_ept(vmcs12) || | |
13034 | !page_address_valid(vcpu, vmcs12->eptp_list_address)) | |
13035 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13036 | } | |
13037 | } | |
27c42a1b | 13038 | |
c7c2c709 JM |
13039 | if (vmcs12->cr3_target_count > nested_cpu_vmx_misc_cr3_count(vcpu)) |
13040 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13041 | ||
3899152c | 13042 | if (!nested_host_cr0_valid(vcpu, vmcs12->host_cr0) || |
1dc35dac | 13043 | !nested_host_cr4_valid(vcpu, vmcs12->host_cr4) || |
ca0bde28 JM |
13044 | !nested_cr3_valid(vcpu, vmcs12->host_cr3)) |
13045 | return VMXERR_ENTRY_INVALID_HOST_STATE_FIELD; | |
13046 | ||
64a919f7 SC |
13047 | /* |
13048 | * If the load IA32_EFER VM-exit control is 1, bits reserved in the | |
13049 | * IA32_EFER MSR must be 0 in the field for that register. In addition, | |
13050 | * the values of the LMA and LME bits in the field must each be that of | |
13051 | * the host address-space size VM-exit control. | |
13052 | */ | |
13053 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) { | |
13054 | ia32e = (vmcs12->vm_exit_controls & | |
13055 | VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0; | |
13056 | if (!kvm_valid_efer(vcpu, vmcs12->host_ia32_efer) || | |
13057 | ia32e != !!(vmcs12->host_ia32_efer & EFER_LMA) || | |
13058 | ia32e != !!(vmcs12->host_ia32_efer & EFER_LME)) | |
13059 | return VMXERR_ENTRY_INVALID_HOST_STATE_FIELD; | |
13060 | } | |
13061 | ||
0447378a MO |
13062 | /* |
13063 | * From the Intel SDM, volume 3: | |
13064 | * Fields relevant to VM-entry event injection must be set properly. | |
13065 | * These fields are the VM-entry interruption-information field, the | |
13066 | * VM-entry exception error code, and the VM-entry instruction length. | |
13067 | */ | |
13068 | if (vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK) { | |
13069 | u32 intr_info = vmcs12->vm_entry_intr_info_field; | |
13070 | u8 vector = intr_info & INTR_INFO_VECTOR_MASK; | |
13071 | u32 intr_type = intr_info & INTR_INFO_INTR_TYPE_MASK; | |
13072 | bool has_error_code = intr_info & INTR_INFO_DELIVER_CODE_MASK; | |
13073 | bool should_have_error_code; | |
13074 | bool urg = nested_cpu_has2(vmcs12, | |
13075 | SECONDARY_EXEC_UNRESTRICTED_GUEST); | |
13076 | bool prot_mode = !urg || vmcs12->guest_cr0 & X86_CR0_PE; | |
13077 | ||
13078 | /* VM-entry interruption-info field: interruption type */ | |
13079 | if (intr_type == INTR_TYPE_RESERVED || | |
13080 | (intr_type == INTR_TYPE_OTHER_EVENT && | |
13081 | !nested_cpu_supports_monitor_trap_flag(vcpu))) | |
13082 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13083 | ||
13084 | /* VM-entry interruption-info field: vector */ | |
13085 | if ((intr_type == INTR_TYPE_NMI_INTR && vector != NMI_VECTOR) || | |
13086 | (intr_type == INTR_TYPE_HARD_EXCEPTION && vector > 31) || | |
13087 | (intr_type == INTR_TYPE_OTHER_EVENT && vector != 0)) | |
13088 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13089 | ||
13090 | /* VM-entry interruption-info field: deliver error code */ | |
13091 | should_have_error_code = | |
13092 | intr_type == INTR_TYPE_HARD_EXCEPTION && prot_mode && | |
13093 | x86_exception_has_error_code(vector); | |
13094 | if (has_error_code != should_have_error_code) | |
13095 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13096 | ||
13097 | /* VM-entry exception error code */ | |
13098 | if (has_error_code && | |
13099 | vmcs12->vm_entry_exception_error_code & GENMASK(31, 15)) | |
13100 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13101 | ||
13102 | /* VM-entry interruption-info field: reserved bits */ | |
13103 | if (intr_info & INTR_INFO_RESVD_BITS_MASK) | |
13104 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13105 | ||
13106 | /* VM-entry instruction length */ | |
13107 | switch (intr_type) { | |
13108 | case INTR_TYPE_SOFT_EXCEPTION: | |
13109 | case INTR_TYPE_SOFT_INTR: | |
13110 | case INTR_TYPE_PRIV_SW_EXCEPTION: | |
13111 | if ((vmcs12->vm_entry_instruction_len > 15) || | |
13112 | (vmcs12->vm_entry_instruction_len == 0 && | |
13113 | !nested_cpu_has_zero_length_injection(vcpu))) | |
13114 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13115 | } | |
13116 | } | |
13117 | ||
5b8ba41d SC |
13118 | if (nested_cpu_has_ept(vmcs12) && |
13119 | !valid_ept_address(vcpu, vmcs12->ept_pointer)) | |
13120 | return VMXERR_ENTRY_INVALID_CONTROL_FIELD; | |
13121 | ||
ca0bde28 JM |
13122 | return 0; |
13123 | } | |
13124 | ||
f145d90d LA |
13125 | static int nested_vmx_check_vmcs_link_ptr(struct kvm_vcpu *vcpu, |
13126 | struct vmcs12 *vmcs12) | |
13127 | { | |
13128 | int r; | |
13129 | struct page *page; | |
13130 | struct vmcs12 *shadow; | |
13131 | ||
13132 | if (vmcs12->vmcs_link_pointer == -1ull) | |
13133 | return 0; | |
13134 | ||
13135 | if (!page_address_valid(vcpu, vmcs12->vmcs_link_pointer)) | |
13136 | return -EINVAL; | |
13137 | ||
13138 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->vmcs_link_pointer); | |
13139 | if (is_error_page(page)) | |
13140 | return -EINVAL; | |
13141 | ||
13142 | r = 0; | |
13143 | shadow = kmap(page); | |
13144 | if (shadow->hdr.revision_id != VMCS12_REVISION || | |
13145 | shadow->hdr.shadow_vmcs != nested_cpu_has_shadow_vmcs(vmcs12)) | |
13146 | r = -EINVAL; | |
13147 | kunmap(page); | |
13148 | kvm_release_page_clean(page); | |
13149 | return r; | |
13150 | } | |
13151 | ||
ca0bde28 JM |
13152 | static int check_vmentry_postreqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, |
13153 | u32 *exit_qual) | |
13154 | { | |
13155 | bool ia32e; | |
13156 | ||
13157 | *exit_qual = ENTRY_FAIL_DEFAULT; | |
7c177938 | 13158 | |
3899152c | 13159 | if (!nested_guest_cr0_valid(vcpu, vmcs12->guest_cr0) || |
ca0bde28 | 13160 | !nested_guest_cr4_valid(vcpu, vmcs12->guest_cr4)) |
b428018a | 13161 | return 1; |
ca0bde28 | 13162 | |
f145d90d | 13163 | if (nested_vmx_check_vmcs_link_ptr(vcpu, vmcs12)) { |
ca0bde28 | 13164 | *exit_qual = ENTRY_FAIL_VMCS_LINK_PTR; |
b428018a | 13165 | return 1; |
7c177938 NHE |
13166 | } |
13167 | ||
384bb783 | 13168 | /* |
cb0c8cda | 13169 | * If the load IA32_EFER VM-entry control is 1, the following checks |
384bb783 JK |
13170 | * are performed on the field for the IA32_EFER MSR: |
13171 | * - Bits reserved in the IA32_EFER MSR must be 0. | |
13172 | * - Bit 10 (corresponding to IA32_EFER.LMA) must equal the value of | |
13173 | * the IA-32e mode guest VM-exit control. It must also be identical | |
13174 | * to bit 8 (LME) if bit 31 in the CR0 field (corresponding to | |
13175 | * CR0.PG) is 1. | |
13176 | */ | |
ca0bde28 JM |
13177 | if (to_vmx(vcpu)->nested.nested_run_pending && |
13178 | (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER)) { | |
384bb783 JK |
13179 | ia32e = (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) != 0; |
13180 | if (!kvm_valid_efer(vcpu, vmcs12->guest_ia32_efer) || | |
13181 | ia32e != !!(vmcs12->guest_ia32_efer & EFER_LMA) || | |
13182 | ((vmcs12->guest_cr0 & X86_CR0_PG) && | |
ca0bde28 | 13183 | ia32e != !!(vmcs12->guest_ia32_efer & EFER_LME))) |
b428018a | 13184 | return 1; |
384bb783 JK |
13185 | } |
13186 | ||
f1b026a3 WL |
13187 | if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) && |
13188 | (is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) || | |
13189 | (vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD))) | |
13190 | return 1; | |
13191 | ||
ca0bde28 JM |
13192 | return 0; |
13193 | } | |
13194 | ||
52017608 SC |
13195 | static int __noclone nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu) |
13196 | { | |
13197 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
13198 | unsigned long cr3, cr4; | |
13199 | ||
13200 | if (!nested_early_check) | |
13201 | return 0; | |
13202 | ||
13203 | if (vmx->msr_autoload.host.nr) | |
13204 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
13205 | if (vmx->msr_autoload.guest.nr) | |
13206 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); | |
13207 | ||
13208 | preempt_disable(); | |
13209 | ||
13210 | vmx_prepare_switch_to_guest(vcpu); | |
13211 | ||
13212 | /* | |
13213 | * Induce a consistency check VMExit by clearing bit 1 in GUEST_RFLAGS, | |
13214 | * which is reserved to '1' by hardware. GUEST_RFLAGS is guaranteed to | |
13215 | * be written (by preparve_vmcs02()) before the "real" VMEnter, i.e. | |
13216 | * there is no need to preserve other bits or save/restore the field. | |
13217 | */ | |
13218 | vmcs_writel(GUEST_RFLAGS, 0); | |
13219 | ||
13220 | vmcs_writel(HOST_RIP, vmx_early_consistency_check_return); | |
13221 | ||
13222 | cr3 = __get_current_cr3_fast(); | |
13223 | if (unlikely(cr3 != vmx->loaded_vmcs->host_state.cr3)) { | |
13224 | vmcs_writel(HOST_CR3, cr3); | |
13225 | vmx->loaded_vmcs->host_state.cr3 = cr3; | |
13226 | } | |
13227 | ||
13228 | cr4 = cr4_read_shadow(); | |
13229 | if (unlikely(cr4 != vmx->loaded_vmcs->host_state.cr4)) { | |
13230 | vmcs_writel(HOST_CR4, cr4); | |
13231 | vmx->loaded_vmcs->host_state.cr4 = cr4; | |
13232 | } | |
13233 | ||
13234 | vmx->__launched = vmx->loaded_vmcs->launched; | |
13235 | ||
13236 | asm( | |
13237 | /* Set HOST_RSP */ | |
4b1e5478 | 13238 | __ex("vmwrite %%" _ASM_SP ", %%" _ASM_DX) "\n\t" |
52017608 SC |
13239 | "mov %%" _ASM_SP ", %c[host_rsp](%0)\n\t" |
13240 | ||
13241 | /* Check if vmlaunch of vmresume is needed */ | |
13242 | "cmpl $0, %c[launched](%0)\n\t" | |
13243 | "je 1f\n\t" | |
4b1e5478 | 13244 | __ex("vmresume") "\n\t" |
52017608 | 13245 | "jmp 2f\n\t" |
4b1e5478 | 13246 | "1: " __ex("vmlaunch") "\n\t" |
52017608 SC |
13247 | "jmp 2f\n\t" |
13248 | "2: " | |
13249 | ||
13250 | /* Set vmx->fail accordingly */ | |
13251 | "setbe %c[fail](%0)\n\t" | |
13252 | ||
13253 | ".pushsection .rodata\n\t" | |
13254 | ".global vmx_early_consistency_check_return\n\t" | |
13255 | "vmx_early_consistency_check_return: " _ASM_PTR " 2b\n\t" | |
13256 | ".popsection" | |
13257 | : | |
13258 | : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
13259 | [launched]"i"(offsetof(struct vcpu_vmx, __launched)), | |
13260 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), | |
13261 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)) | |
13262 | : "rax", "cc", "memory" | |
13263 | ); | |
13264 | ||
13265 | vmcs_writel(HOST_RIP, vmx_return); | |
13266 | ||
13267 | preempt_enable(); | |
13268 | ||
13269 | if (vmx->msr_autoload.host.nr) | |
13270 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr); | |
13271 | if (vmx->msr_autoload.guest.nr) | |
13272 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr); | |
13273 | ||
13274 | if (vmx->fail) { | |
13275 | WARN_ON_ONCE(vmcs_read32(VM_INSTRUCTION_ERROR) != | |
13276 | VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
13277 | vmx->fail = 0; | |
13278 | return 1; | |
13279 | } | |
13280 | ||
13281 | /* | |
13282 | * VMExit clears RFLAGS.IF and DR7, even on a consistency check. | |
13283 | */ | |
13284 | local_irq_enable(); | |
13285 | if (hw_breakpoint_active()) | |
13286 | set_debugreg(__this_cpu_read(cpu_dr7), 7); | |
13287 | ||
13288 | /* | |
13289 | * A non-failing VMEntry means we somehow entered guest mode with | |
13290 | * an illegal RIP, and that's just the tip of the iceberg. There | |
13291 | * is no telling what memory has been modified or what state has | |
13292 | * been exposed to unknown code. Hitting this all but guarantees | |
13293 | * a (very critical) hardware issue. | |
13294 | */ | |
13295 | WARN_ON(!(vmcs_read32(VM_EXIT_REASON) & | |
13296 | VMX_EXIT_REASONS_FAILED_VMENTRY)); | |
13297 | ||
13298 | return 0; | |
13299 | } | |
13300 | STACK_FRAME_NON_STANDARD(nested_vmx_check_vmentry_hw); | |
13301 | ||
a633e41e SC |
13302 | static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, |
13303 | struct vmcs12 *vmcs12); | |
13304 | ||
7f7f1ba3 | 13305 | /* |
a633e41e | 13306 | * If from_vmentry is false, this is being called from state restore (either RSM |
8fcc4b59 | 13307 | * or KVM_SET_NESTED_STATE). Otherwise it's called from vmlaunch/vmresume. |
52017608 SC |
13308 | + * |
13309 | + * Returns: | |
13310 | + * 0 - success, i.e. proceed with actual VMEnter | |
13311 | + * 1 - consistency check VMExit | |
13312 | + * -1 - consistency check VMFail | |
7f7f1ba3 | 13313 | */ |
a633e41e SC |
13314 | static int nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu, |
13315 | bool from_vmentry) | |
858e25c0 JM |
13316 | { |
13317 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
13318 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
7e712684 | 13319 | bool evaluate_pending_interrupts; |
a633e41e SC |
13320 | u32 exit_reason = EXIT_REASON_INVALID_STATE; |
13321 | u32 exit_qual; | |
858e25c0 | 13322 | |
7e712684 PB |
13323 | evaluate_pending_interrupts = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
13324 | (CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_VIRTUAL_NMI_PENDING); | |
13325 | if (likely(!evaluate_pending_interrupts) && kvm_vcpu_apicv_active(vcpu)) | |
13326 | evaluate_pending_interrupts |= vmx_has_apicv_interrupt(vcpu); | |
b5861e5c | 13327 | |
858e25c0 JM |
13328 | if (!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS)) |
13329 | vmx->nested.vmcs01_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); | |
62cf9bd8 LA |
13330 | if (kvm_mpx_supported() && |
13331 | !(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS)) | |
13332 | vmx->nested.vmcs01_guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS); | |
858e25c0 | 13333 | |
de3a0021 | 13334 | vmx_switch_vmcs(vcpu, &vmx->nested.vmcs02); |
858e25c0 | 13335 | |
16fb9a46 SC |
13336 | prepare_vmcs02_early(vmx, vmcs12); |
13337 | ||
13338 | if (from_vmentry) { | |
13339 | nested_get_vmcs12_pages(vcpu); | |
13340 | ||
52017608 SC |
13341 | if (nested_vmx_check_vmentry_hw(vcpu)) { |
13342 | vmx_switch_vmcs(vcpu, &vmx->vmcs01); | |
13343 | return -1; | |
13344 | } | |
13345 | ||
16fb9a46 SC |
13346 | if (check_vmentry_postreqs(vcpu, vmcs12, &exit_qual)) |
13347 | goto vmentry_fail_vmexit; | |
13348 | } | |
13349 | ||
13350 | enter_guest_mode(vcpu); | |
e79f245d KA |
13351 | if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING) |
13352 | vcpu->arch.tsc_offset += vmcs12->tsc_offset; | |
13353 | ||
a633e41e | 13354 | if (prepare_vmcs02(vcpu, vmcs12, &exit_qual)) |
39f9c388 | 13355 | goto vmentry_fail_vmexit_guest_mode; |
858e25c0 | 13356 | |
7f7f1ba3 | 13357 | if (from_vmentry) { |
a633e41e SC |
13358 | exit_reason = EXIT_REASON_MSR_LOAD_FAIL; |
13359 | exit_qual = nested_vmx_load_msr(vcpu, | |
13360 | vmcs12->vm_entry_msr_load_addr, | |
13361 | vmcs12->vm_entry_msr_load_count); | |
13362 | if (exit_qual) | |
39f9c388 | 13363 | goto vmentry_fail_vmexit_guest_mode; |
7f7f1ba3 PB |
13364 | } else { |
13365 | /* | |
13366 | * The MMU is not initialized to point at the right entities yet and | |
13367 | * "get pages" would need to read data from the guest (i.e. we will | |
13368 | * need to perform gpa to hpa translation). Request a call | |
13369 | * to nested_get_vmcs12_pages before the next VM-entry. The MSRs | |
13370 | * have already been set at vmentry time and should not be reset. | |
13371 | */ | |
13372 | kvm_make_request(KVM_REQ_GET_VMCS12_PAGES, vcpu); | |
13373 | } | |
858e25c0 | 13374 | |
b5861e5c LA |
13375 | /* |
13376 | * If L1 had a pending IRQ/NMI until it executed | |
13377 | * VMLAUNCH/VMRESUME which wasn't delivered because it was | |
13378 | * disallowed (e.g. interrupts disabled), L0 needs to | |
13379 | * evaluate if this pending event should cause an exit from L2 | |
13380 | * to L1 or delivered directly to L2 (e.g. In case L1 don't | |
13381 | * intercept EXTERNAL_INTERRUPT). | |
13382 | * | |
7e712684 PB |
13383 | * Usually this would be handled by the processor noticing an |
13384 | * IRQ/NMI window request, or checking RVI during evaluation of | |
13385 | * pending virtual interrupts. However, this setting was done | |
13386 | * on VMCS01 and now VMCS02 is active instead. Thus, we force L0 | |
13387 | * to perform pending event evaluation by requesting a KVM_REQ_EVENT. | |
b5861e5c | 13388 | */ |
7e712684 | 13389 | if (unlikely(evaluate_pending_interrupts)) |
b5861e5c | 13390 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
b5861e5c | 13391 | |
858e25c0 JM |
13392 | /* |
13393 | * Note no nested_vmx_succeed or nested_vmx_fail here. At this point | |
13394 | * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet | |
13395 | * returned as far as L1 is concerned. It will only return (and set | |
13396 | * the success flag) when L2 exits (see nested_vmx_vmexit()). | |
13397 | */ | |
13398 | return 0; | |
e79f245d | 13399 | |
a633e41e SC |
13400 | /* |
13401 | * A failed consistency check that leads to a VMExit during L1's | |
13402 | * VMEnter to L2 is a variation of a normal VMexit, as explained in | |
13403 | * 26.7 "VM-entry failures during or after loading guest state". | |
13404 | */ | |
39f9c388 | 13405 | vmentry_fail_vmexit_guest_mode: |
e79f245d KA |
13406 | if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING) |
13407 | vcpu->arch.tsc_offset -= vmcs12->tsc_offset; | |
13408 | leave_guest_mode(vcpu); | |
16fb9a46 SC |
13409 | |
13410 | vmentry_fail_vmexit: | |
e79f245d | 13411 | vmx_switch_vmcs(vcpu, &vmx->vmcs01); |
a633e41e SC |
13412 | |
13413 | if (!from_vmentry) | |
13414 | return 1; | |
13415 | ||
a633e41e SC |
13416 | load_vmcs12_host_state(vcpu, vmcs12); |
13417 | vmcs12->vm_exit_reason = exit_reason | VMX_EXIT_REASONS_FAILED_VMENTRY; | |
13418 | vmcs12->exit_qualification = exit_qual; | |
945679e3 VK |
13419 | if (enable_shadow_vmcs || vmx->nested.hv_evmcs) |
13420 | vmx->nested.need_vmcs12_sync = true; | |
a633e41e | 13421 | return 1; |
858e25c0 JM |
13422 | } |
13423 | ||
ca0bde28 JM |
13424 | /* |
13425 | * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1 | |
13426 | * for running an L2 nested guest. | |
13427 | */ | |
13428 | static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) | |
13429 | { | |
13430 | struct vmcs12 *vmcs12; | |
13431 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
b3f1dfb6 | 13432 | u32 interrupt_shadow = vmx_get_interrupt_shadow(vcpu); |
ca0bde28 JM |
13433 | int ret; |
13434 | ||
13435 | if (!nested_vmx_check_permission(vcpu)) | |
13436 | return 1; | |
13437 | ||
8cab6507 | 13438 | if (!nested_vmx_handle_enlightened_vmptrld(vcpu, true)) |
b8bbab92 VK |
13439 | return 1; |
13440 | ||
13441 | if (!vmx->nested.hv_evmcs && vmx->nested.current_vmptr == -1ull) | |
09abb5e3 | 13442 | return nested_vmx_failInvalid(vcpu); |
ca0bde28 JM |
13443 | |
13444 | vmcs12 = get_vmcs12(vcpu); | |
13445 | ||
a6192d40 LA |
13446 | /* |
13447 | * Can't VMLAUNCH or VMRESUME a shadow VMCS. Despite the fact | |
13448 | * that there *is* a valid VMCS pointer, RFLAGS.CF is set | |
13449 | * rather than RFLAGS.ZF, and no error number is stored to the | |
13450 | * VM-instruction error field. | |
13451 | */ | |
09abb5e3 SC |
13452 | if (vmcs12->hdr.shadow_vmcs) |
13453 | return nested_vmx_failInvalid(vcpu); | |
a6192d40 | 13454 | |
945679e3 VK |
13455 | if (vmx->nested.hv_evmcs) { |
13456 | copy_enlightened_to_vmcs12(vmx); | |
13457 | /* Enlightened VMCS doesn't have launch state */ | |
13458 | vmcs12->launch_state = !launch; | |
13459 | } else if (enable_shadow_vmcs) { | |
ca0bde28 | 13460 | copy_shadow_to_vmcs12(vmx); |
945679e3 | 13461 | } |
ca0bde28 JM |
13462 | |
13463 | /* | |
13464 | * The nested entry process starts with enforcing various prerequisites | |
13465 | * on vmcs12 as required by the Intel SDM, and act appropriately when | |
13466 | * they fail: As the SDM explains, some conditions should cause the | |
13467 | * instruction to fail, while others will cause the instruction to seem | |
13468 | * to succeed, but return an EXIT_REASON_INVALID_STATE. | |
13469 | * To speed up the normal (success) code path, we should avoid checking | |
13470 | * for misconfigurations which will anyway be caught by the processor | |
13471 | * when using the merged vmcs02. | |
13472 | */ | |
09abb5e3 SC |
13473 | if (interrupt_shadow & KVM_X86_SHADOW_INT_MOV_SS) |
13474 | return nested_vmx_failValid(vcpu, | |
13475 | VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS); | |
b3f1dfb6 | 13476 | |
09abb5e3 SC |
13477 | if (vmcs12->launch_state == launch) |
13478 | return nested_vmx_failValid(vcpu, | |
ca0bde28 JM |
13479 | launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS |
13480 | : VMXERR_VMRESUME_NONLAUNCHED_VMCS); | |
ca0bde28 JM |
13481 | |
13482 | ret = check_vmentry_prereqs(vcpu, vmcs12); | |
09abb5e3 SC |
13483 | if (ret) |
13484 | return nested_vmx_failValid(vcpu, ret); | |
ca0bde28 | 13485 | |
7c177938 NHE |
13486 | /* |
13487 | * We're finally done with prerequisite checking, and can start with | |
13488 | * the nested entry. | |
13489 | */ | |
6514dc38 | 13490 | vmx->nested.nested_run_pending = 1; |
a633e41e | 13491 | ret = nested_vmx_enter_non_root_mode(vcpu, true); |
52017608 SC |
13492 | vmx->nested.nested_run_pending = !ret; |
13493 | if (ret > 0) | |
7f7f1ba3 | 13494 | return 1; |
52017608 SC |
13495 | else if (ret) |
13496 | return nested_vmx_failValid(vcpu, | |
13497 | VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
ff651cb6 | 13498 | |
c595ceee PB |
13499 | /* Hide L1D cache contents from the nested guest. */ |
13500 | vmx->vcpu.arch.l1tf_flush_l1d = true; | |
13501 | ||
61ada748 | 13502 | /* |
d63907dc | 13503 | * Must happen outside of nested_vmx_enter_non_root_mode() as it will |
61ada748 LA |
13504 | * also be used as part of restoring nVMX state for |
13505 | * snapshot restore (migration). | |
13506 | * | |
13507 | * In this flow, it is assumed that vmcs12 cache was | |
13508 | * trasferred as part of captured nVMX state and should | |
13509 | * therefore not be read from guest memory (which may not | |
13510 | * exist on destination host yet). | |
13511 | */ | |
13512 | nested_cache_shadow_vmcs12(vcpu, vmcs12); | |
13513 | ||
135a06c3 CG |
13514 | /* |
13515 | * If we're entering a halted L2 vcpu and the L2 vcpu won't be woken | |
13516 | * by event injection, halt vcpu. | |
13517 | */ | |
13518 | if ((vmcs12->guest_activity_state == GUEST_ACTIVITY_HLT) && | |
6514dc38 JM |
13519 | !(vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK)) { |
13520 | vmx->nested.nested_run_pending = 0; | |
5cb56059 | 13521 | return kvm_vcpu_halt(vcpu); |
6514dc38 | 13522 | } |
cd232ad0 NHE |
13523 | return 1; |
13524 | } | |
13525 | ||
4704d0be NHE |
13526 | /* |
13527 | * On a nested exit from L2 to L1, vmcs12.guest_cr0 might not be up-to-date | |
13528 | * because L2 may have changed some cr0 bits directly (CRO_GUEST_HOST_MASK). | |
13529 | * This function returns the new value we should put in vmcs12.guest_cr0. | |
13530 | * It's not enough to just return the vmcs02 GUEST_CR0. Rather, | |
13531 | * 1. Bits that neither L0 nor L1 trapped, were set directly by L2 and are now | |
13532 | * available in vmcs02 GUEST_CR0. (Note: It's enough to check that L0 | |
13533 | * didn't trap the bit, because if L1 did, so would L0). | |
13534 | * 2. Bits that L1 asked to trap (and therefore L0 also did) could not have | |
13535 | * been modified by L2, and L1 knows it. So just leave the old value of | |
13536 | * the bit from vmcs12.guest_cr0. Note that the bit from vmcs02 GUEST_CR0 | |
13537 | * isn't relevant, because if L0 traps this bit it can set it to anything. | |
13538 | * 3. Bits that L1 didn't trap, but L0 did. L1 believes the guest could have | |
13539 | * changed these bits, and therefore they need to be updated, but L0 | |
13540 | * didn't necessarily allow them to be changed in GUEST_CR0 - and rather | |
13541 | * put them in vmcs02 CR0_READ_SHADOW. So take these bits from there. | |
13542 | */ | |
13543 | static inline unsigned long | |
13544 | vmcs12_guest_cr0(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
13545 | { | |
13546 | return | |
13547 | /*1*/ (vmcs_readl(GUEST_CR0) & vcpu->arch.cr0_guest_owned_bits) | | |
13548 | /*2*/ (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask) | | |
13549 | /*3*/ (vmcs_readl(CR0_READ_SHADOW) & ~(vmcs12->cr0_guest_host_mask | | |
13550 | vcpu->arch.cr0_guest_owned_bits)); | |
13551 | } | |
13552 | ||
13553 | static inline unsigned long | |
13554 | vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
13555 | { | |
13556 | return | |
13557 | /*1*/ (vmcs_readl(GUEST_CR4) & vcpu->arch.cr4_guest_owned_bits) | | |
13558 | /*2*/ (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask) | | |
13559 | /*3*/ (vmcs_readl(CR4_READ_SHADOW) & ~(vmcs12->cr4_guest_host_mask | | |
13560 | vcpu->arch.cr4_guest_owned_bits)); | |
13561 | } | |
13562 | ||
5f3d5799 JK |
13563 | static void vmcs12_save_pending_event(struct kvm_vcpu *vcpu, |
13564 | struct vmcs12 *vmcs12) | |
13565 | { | |
13566 | u32 idt_vectoring; | |
13567 | unsigned int nr; | |
13568 | ||
664f8e26 | 13569 | if (vcpu->arch.exception.injected) { |
5f3d5799 JK |
13570 | nr = vcpu->arch.exception.nr; |
13571 | idt_vectoring = nr | VECTORING_INFO_VALID_MASK; | |
13572 | ||
13573 | if (kvm_exception_is_soft(nr)) { | |
13574 | vmcs12->vm_exit_instruction_len = | |
13575 | vcpu->arch.event_exit_inst_len; | |
13576 | idt_vectoring |= INTR_TYPE_SOFT_EXCEPTION; | |
13577 | } else | |
13578 | idt_vectoring |= INTR_TYPE_HARD_EXCEPTION; | |
13579 | ||
13580 | if (vcpu->arch.exception.has_error_code) { | |
13581 | idt_vectoring |= VECTORING_INFO_DELIVER_CODE_MASK; | |
13582 | vmcs12->idt_vectoring_error_code = | |
13583 | vcpu->arch.exception.error_code; | |
13584 | } | |
13585 | ||
13586 | vmcs12->idt_vectoring_info_field = idt_vectoring; | |
cd2633c5 | 13587 | } else if (vcpu->arch.nmi_injected) { |
5f3d5799 JK |
13588 | vmcs12->idt_vectoring_info_field = |
13589 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR; | |
04140b41 | 13590 | } else if (vcpu->arch.interrupt.injected) { |
5f3d5799 JK |
13591 | nr = vcpu->arch.interrupt.nr; |
13592 | idt_vectoring = nr | VECTORING_INFO_VALID_MASK; | |
13593 | ||
13594 | if (vcpu->arch.interrupt.soft) { | |
13595 | idt_vectoring |= INTR_TYPE_SOFT_INTR; | |
13596 | vmcs12->vm_entry_instruction_len = | |
13597 | vcpu->arch.event_exit_inst_len; | |
13598 | } else | |
13599 | idt_vectoring |= INTR_TYPE_EXT_INTR; | |
13600 | ||
13601 | vmcs12->idt_vectoring_info_field = idt_vectoring; | |
13602 | } | |
13603 | } | |
13604 | ||
b6b8a145 JK |
13605 | static int vmx_check_nested_events(struct kvm_vcpu *vcpu, bool external_intr) |
13606 | { | |
13607 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
bfcf83b1 | 13608 | unsigned long exit_qual; |
917dc606 LA |
13609 | bool block_nested_events = |
13610 | vmx->nested.nested_run_pending || kvm_event_needs_reinjection(vcpu); | |
acc9ab60 | 13611 | |
bfcf83b1 WL |
13612 | if (vcpu->arch.exception.pending && |
13613 | nested_vmx_check_exception(vcpu, &exit_qual)) { | |
917dc606 | 13614 | if (block_nested_events) |
bfcf83b1 WL |
13615 | return -EBUSY; |
13616 | nested_vmx_inject_exception_vmexit(vcpu, exit_qual); | |
bfcf83b1 WL |
13617 | return 0; |
13618 | } | |
13619 | ||
f4124500 JK |
13620 | if (nested_cpu_has_preemption_timer(get_vmcs12(vcpu)) && |
13621 | vmx->nested.preemption_timer_expired) { | |
917dc606 | 13622 | if (block_nested_events) |
f4124500 JK |
13623 | return -EBUSY; |
13624 | nested_vmx_vmexit(vcpu, EXIT_REASON_PREEMPTION_TIMER, 0, 0); | |
13625 | return 0; | |
13626 | } | |
13627 | ||
b6b8a145 | 13628 | if (vcpu->arch.nmi_pending && nested_exit_on_nmi(vcpu)) { |
917dc606 | 13629 | if (block_nested_events) |
b6b8a145 JK |
13630 | return -EBUSY; |
13631 | nested_vmx_vmexit(vcpu, EXIT_REASON_EXCEPTION_NMI, | |
13632 | NMI_VECTOR | INTR_TYPE_NMI_INTR | | |
13633 | INTR_INFO_VALID_MASK, 0); | |
13634 | /* | |
13635 | * The NMI-triggered VM exit counts as injection: | |
13636 | * clear this one and block further NMIs. | |
13637 | */ | |
13638 | vcpu->arch.nmi_pending = 0; | |
13639 | vmx_set_nmi_mask(vcpu, true); | |
13640 | return 0; | |
13641 | } | |
13642 | ||
13643 | if ((kvm_cpu_has_interrupt(vcpu) || external_intr) && | |
13644 | nested_exit_on_intr(vcpu)) { | |
917dc606 | 13645 | if (block_nested_events) |
b6b8a145 JK |
13646 | return -EBUSY; |
13647 | nested_vmx_vmexit(vcpu, EXIT_REASON_EXTERNAL_INTERRUPT, 0, 0); | |
705699a1 | 13648 | return 0; |
b6b8a145 JK |
13649 | } |
13650 | ||
6342c50a DH |
13651 | vmx_complete_nested_posted_interrupt(vcpu); |
13652 | return 0; | |
b6b8a145 JK |
13653 | } |
13654 | ||
d264ee0c SC |
13655 | static void vmx_request_immediate_exit(struct kvm_vcpu *vcpu) |
13656 | { | |
13657 | to_vmx(vcpu)->req_immediate_exit = true; | |
13658 | } | |
13659 | ||
f4124500 JK |
13660 | static u32 vmx_get_preemption_timer_value(struct kvm_vcpu *vcpu) |
13661 | { | |
13662 | ktime_t remaining = | |
13663 | hrtimer_get_remaining(&to_vmx(vcpu)->nested.preemption_timer); | |
13664 | u64 value; | |
13665 | ||
13666 | if (ktime_to_ns(remaining) <= 0) | |
13667 | return 0; | |
13668 | ||
13669 | value = ktime_to_ns(remaining) * vcpu->arch.virtual_tsc_khz; | |
13670 | do_div(value, 1000000); | |
13671 | return value >> VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE; | |
13672 | } | |
13673 | ||
4704d0be | 13674 | /* |
cf8b84f4 JM |
13675 | * Update the guest state fields of vmcs12 to reflect changes that |
13676 | * occurred while L2 was running. (The "IA-32e mode guest" bit of the | |
13677 | * VM-entry controls is also updated, since this is really a guest | |
13678 | * state bit.) | |
4704d0be | 13679 | */ |
cf8b84f4 | 13680 | static void sync_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) |
4704d0be | 13681 | { |
4704d0be NHE |
13682 | vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12); |
13683 | vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12); | |
13684 | ||
4704d0be NHE |
13685 | vmcs12->guest_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); |
13686 | vmcs12->guest_rip = kvm_register_read(vcpu, VCPU_REGS_RIP); | |
13687 | vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS); | |
13688 | ||
13689 | vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR); | |
13690 | vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR); | |
13691 | vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR); | |
13692 | vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR); | |
13693 | vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR); | |
13694 | vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR); | |
13695 | vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR); | |
13696 | vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR); | |
13697 | vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT); | |
13698 | vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT); | |
13699 | vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT); | |
13700 | vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT); | |
13701 | vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT); | |
13702 | vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT); | |
13703 | vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT); | |
13704 | vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT); | |
13705 | vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT); | |
13706 | vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT); | |
13707 | vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES); | |
13708 | vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES); | |
13709 | vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES); | |
13710 | vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES); | |
13711 | vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES); | |
13712 | vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES); | |
13713 | vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES); | |
13714 | vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES); | |
13715 | vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE); | |
13716 | vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE); | |
13717 | vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE); | |
13718 | vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE); | |
13719 | vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE); | |
13720 | vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE); | |
13721 | vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE); | |
13722 | vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE); | |
13723 | vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE); | |
13724 | vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE); | |
13725 | ||
4704d0be NHE |
13726 | vmcs12->guest_interruptibility_info = |
13727 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
13728 | vmcs12->guest_pending_dbg_exceptions = | |
13729 | vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS); | |
3edf1e69 JK |
13730 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED) |
13731 | vmcs12->guest_activity_state = GUEST_ACTIVITY_HLT; | |
13732 | else | |
13733 | vmcs12->guest_activity_state = GUEST_ACTIVITY_ACTIVE; | |
4704d0be | 13734 | |
f4124500 JK |
13735 | if (nested_cpu_has_preemption_timer(vmcs12)) { |
13736 | if (vmcs12->vm_exit_controls & | |
13737 | VM_EXIT_SAVE_VMX_PREEMPTION_TIMER) | |
13738 | vmcs12->vmx_preemption_timer_value = | |
13739 | vmx_get_preemption_timer_value(vcpu); | |
13740 | hrtimer_cancel(&to_vmx(vcpu)->nested.preemption_timer); | |
13741 | } | |
7854cbca | 13742 | |
3633cfc3 NHE |
13743 | /* |
13744 | * In some cases (usually, nested EPT), L2 is allowed to change its | |
13745 | * own CR3 without exiting. If it has changed it, we must keep it. | |
13746 | * Of course, if L0 is using shadow page tables, GUEST_CR3 was defined | |
13747 | * by L0, not L1 or L2, so we mustn't unconditionally copy it to vmcs12. | |
13748 | * | |
13749 | * Additionally, restore L2's PDPTR to vmcs12. | |
13750 | */ | |
13751 | if (enable_ept) { | |
f3531054 | 13752 | vmcs12->guest_cr3 = vmcs_readl(GUEST_CR3); |
3633cfc3 NHE |
13753 | vmcs12->guest_pdptr0 = vmcs_read64(GUEST_PDPTR0); |
13754 | vmcs12->guest_pdptr1 = vmcs_read64(GUEST_PDPTR1); | |
13755 | vmcs12->guest_pdptr2 = vmcs_read64(GUEST_PDPTR2); | |
13756 | vmcs12->guest_pdptr3 = vmcs_read64(GUEST_PDPTR3); | |
13757 | } | |
13758 | ||
d281e13b | 13759 | vmcs12->guest_linear_address = vmcs_readl(GUEST_LINEAR_ADDRESS); |
119a9c01 | 13760 | |
608406e2 WV |
13761 | if (nested_cpu_has_vid(vmcs12)) |
13762 | vmcs12->guest_intr_status = vmcs_read16(GUEST_INTR_STATUS); | |
13763 | ||
c18911a2 JK |
13764 | vmcs12->vm_entry_controls = |
13765 | (vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) | | |
2961e876 | 13766 | (vm_entry_controls_get(to_vmx(vcpu)) & VM_ENTRY_IA32E_MODE); |
c18911a2 | 13767 | |
2996fca0 JK |
13768 | if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_DEBUG_CONTROLS) { |
13769 | kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7); | |
13770 | vmcs12->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); | |
13771 | } | |
13772 | ||
4704d0be NHE |
13773 | /* TODO: These cannot have changed unless we have MSR bitmaps and |
13774 | * the relevant bit asks not to trap the change */ | |
b8c07d55 | 13775 | if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_PAT) |
4704d0be | 13776 | vmcs12->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT); |
10ba54a5 JK |
13777 | if (vmcs12->vm_exit_controls & VM_EXIT_SAVE_IA32_EFER) |
13778 | vmcs12->guest_ia32_efer = vcpu->arch.efer; | |
4704d0be NHE |
13779 | vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS); |
13780 | vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP); | |
13781 | vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP); | |
a87036ad | 13782 | if (kvm_mpx_supported()) |
36be0b9d | 13783 | vmcs12->guest_bndcfgs = vmcs_read64(GUEST_BNDCFGS); |
cf8b84f4 JM |
13784 | } |
13785 | ||
13786 | /* | |
13787 | * prepare_vmcs12 is part of what we need to do when the nested L2 guest exits | |
13788 | * and we want to prepare to run its L1 parent. L1 keeps a vmcs for L2 (vmcs12), | |
13789 | * and this function updates it to reflect the changes to the guest state while | |
13790 | * L2 was running (and perhaps made some exits which were handled directly by L0 | |
13791 | * without going back to L1), and to reflect the exit reason. | |
13792 | * Note that we do not have to copy here all VMCS fields, just those that | |
13793 | * could have changed by the L2 guest or the exit - i.e., the guest-state and | |
13794 | * exit-information fields only. Other fields are modified by L1 with VMWRITE, | |
13795 | * which already writes to vmcs12 directly. | |
13796 | */ | |
13797 | static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, | |
13798 | u32 exit_reason, u32 exit_intr_info, | |
13799 | unsigned long exit_qualification) | |
13800 | { | |
13801 | /* update guest state fields: */ | |
13802 | sync_vmcs12(vcpu, vmcs12); | |
4704d0be NHE |
13803 | |
13804 | /* update exit information fields: */ | |
13805 | ||
533558bc JK |
13806 | vmcs12->vm_exit_reason = exit_reason; |
13807 | vmcs12->exit_qualification = exit_qualification; | |
533558bc | 13808 | vmcs12->vm_exit_intr_info = exit_intr_info; |
7313c698 | 13809 | |
5f3d5799 | 13810 | vmcs12->idt_vectoring_info_field = 0; |
4704d0be NHE |
13811 | vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
13812 | vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
13813 | ||
5f3d5799 | 13814 | if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) { |
7cdc2d62 JM |
13815 | vmcs12->launch_state = 1; |
13816 | ||
5f3d5799 JK |
13817 | /* vm_entry_intr_info_field is cleared on exit. Emulate this |
13818 | * instead of reading the real value. */ | |
4704d0be | 13819 | vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK; |
5f3d5799 JK |
13820 | |
13821 | /* | |
13822 | * Transfer the event that L0 or L1 may wanted to inject into | |
13823 | * L2 to IDT_VECTORING_INFO_FIELD. | |
13824 | */ | |
13825 | vmcs12_save_pending_event(vcpu, vmcs12); | |
13826 | } | |
13827 | ||
13828 | /* | |
13829 | * Drop what we picked up for L2 via vmx_complete_interrupts. It is | |
13830 | * preserved above and would only end up incorrectly in L1. | |
13831 | */ | |
13832 | vcpu->arch.nmi_injected = false; | |
13833 | kvm_clear_exception_queue(vcpu); | |
13834 | kvm_clear_interrupt_queue(vcpu); | |
4704d0be NHE |
13835 | } |
13836 | ||
13837 | /* | |
13838 | * A part of what we need to when the nested L2 guest exits and we want to | |
13839 | * run its L1 parent, is to reset L1's guest state to the host state specified | |
13840 | * in vmcs12. | |
13841 | * This function is to be called not only on normal nested exit, but also on | |
13842 | * a nested entry failure, as explained in Intel's spec, 3B.23.7 ("VM-Entry | |
13843 | * Failures During or After Loading Guest State"). | |
13844 | * This function should be called when the active VMCS is L1's (vmcs01). | |
13845 | */ | |
733568f9 JK |
13846 | static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, |
13847 | struct vmcs12 *vmcs12) | |
4704d0be | 13848 | { |
21feb4eb | 13849 | struct kvm_segment seg; |
bd18bffc | 13850 | u32 entry_failure_code; |
21feb4eb | 13851 | |
4704d0be NHE |
13852 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) |
13853 | vcpu->arch.efer = vmcs12->host_ia32_efer; | |
d1fa0352 | 13854 | else if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) |
4704d0be NHE |
13855 | vcpu->arch.efer |= (EFER_LMA | EFER_LME); |
13856 | else | |
13857 | vcpu->arch.efer &= ~(EFER_LMA | EFER_LME); | |
13858 | vmx_set_efer(vcpu, vcpu->arch.efer); | |
13859 | ||
13860 | kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp); | |
13861 | kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip); | |
1adfa76a | 13862 | vmx_set_rflags(vcpu, X86_EFLAGS_FIXED); |
cb61de2f SC |
13863 | vmx_set_interrupt_shadow(vcpu, 0); |
13864 | ||
4704d0be NHE |
13865 | /* |
13866 | * Note that calling vmx_set_cr0 is important, even if cr0 hasn't | |
bd7e5b08 PB |
13867 | * actually changed, because vmx_set_cr0 refers to efer set above. |
13868 | * | |
13869 | * CR0_GUEST_HOST_MASK is already set in the original vmcs01 | |
13870 | * (KVM doesn't change it); | |
4704d0be | 13871 | */ |
bd7e5b08 | 13872 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; |
9e3e4dbf | 13873 | vmx_set_cr0(vcpu, vmcs12->host_cr0); |
4704d0be | 13874 | |
bd7e5b08 | 13875 | /* Same as above - no reason to call set_cr4_guest_host_mask(). */ |
4704d0be | 13876 | vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK); |
8eb3f87d | 13877 | vmx_set_cr4(vcpu, vmcs12->host_cr4); |
4704d0be | 13878 | |
bd18bffc SC |
13879 | nested_ept_uninit_mmu_context(vcpu); |
13880 | ||
13881 | /* | |
13882 | * Only PDPTE load can fail as the value of cr3 was checked on entry and | |
13883 | * couldn't have changed. | |
13884 | */ | |
13885 | if (nested_vmx_load_cr3(vcpu, vmcs12->host_cr3, false, &entry_failure_code)) | |
13886 | nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_PDPTE_FAIL); | |
13887 | ||
13888 | if (!enable_ept) | |
13889 | vcpu->arch.walk_mmu->inject_page_fault = kvm_inject_page_fault; | |
feaf0c7d | 13890 | |
6f1e03bc | 13891 | /* |
efebf0aa | 13892 | * If vmcs01 doesn't use VPID, CPU flushes TLB on every |
6f1e03bc LA |
13893 | * VMEntry/VMExit. Thus, no need to flush TLB. |
13894 | * | |
efebf0aa LA |
13895 | * If vmcs12 doesn't use VPID, L1 expects TLB to be |
13896 | * flushed on every VMEntry/VMExit. | |
6f1e03bc | 13897 | * |
efebf0aa LA |
13898 | * Otherwise, we can preserve TLB entries as long as we are |
13899 | * able to tag L1 TLB entries differently than L2 TLB entries. | |
1438921c LA |
13900 | * |
13901 | * If vmcs12 uses EPT, we need to execute this flush on EPTP01 | |
13902 | * and therefore we request the TLB flush to happen only after VMCS EPTP | |
13903 | * has been set by KVM_REQ_LOAD_CR3. | |
6f1e03bc LA |
13904 | */ |
13905 | if (enable_vpid && | |
efebf0aa | 13906 | (!nested_cpu_has_vpid(vmcs12) || !nested_has_guest_tlb_tag(vcpu))) { |
1438921c | 13907 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
4704d0be | 13908 | } |
4704d0be NHE |
13909 | |
13910 | vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs); | |
13911 | vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp); | |
13912 | vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip); | |
13913 | vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base); | |
13914 | vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base); | |
21f2d551 LP |
13915 | vmcs_write32(GUEST_IDTR_LIMIT, 0xFFFF); |
13916 | vmcs_write32(GUEST_GDTR_LIMIT, 0xFFFF); | |
4704d0be | 13917 | |
36be0b9d PB |
13918 | /* If not VM_EXIT_CLEAR_BNDCFGS, the L2 value propagates to L1. */ |
13919 | if (vmcs12->vm_exit_controls & VM_EXIT_CLEAR_BNDCFGS) | |
13920 | vmcs_write64(GUEST_BNDCFGS, 0); | |
13921 | ||
44811c02 | 13922 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) { |
4704d0be | 13923 | vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat); |
44811c02 JK |
13924 | vcpu->arch.pat = vmcs12->host_ia32_pat; |
13925 | } | |
4704d0be NHE |
13926 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) |
13927 | vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL, | |
13928 | vmcs12->host_ia32_perf_global_ctrl); | |
503cd0c5 | 13929 | |
21feb4eb ACL |
13930 | /* Set L1 segment info according to Intel SDM |
13931 | 27.5.2 Loading Host Segment and Descriptor-Table Registers */ | |
13932 | seg = (struct kvm_segment) { | |
13933 | .base = 0, | |
13934 | .limit = 0xFFFFFFFF, | |
13935 | .selector = vmcs12->host_cs_selector, | |
13936 | .type = 11, | |
13937 | .present = 1, | |
13938 | .s = 1, | |
13939 | .g = 1 | |
13940 | }; | |
13941 | if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) | |
13942 | seg.l = 1; | |
13943 | else | |
13944 | seg.db = 1; | |
13945 | vmx_set_segment(vcpu, &seg, VCPU_SREG_CS); | |
13946 | seg = (struct kvm_segment) { | |
13947 | .base = 0, | |
13948 | .limit = 0xFFFFFFFF, | |
13949 | .type = 3, | |
13950 | .present = 1, | |
13951 | .s = 1, | |
13952 | .db = 1, | |
13953 | .g = 1 | |
13954 | }; | |
13955 | seg.selector = vmcs12->host_ds_selector; | |
13956 | vmx_set_segment(vcpu, &seg, VCPU_SREG_DS); | |
13957 | seg.selector = vmcs12->host_es_selector; | |
13958 | vmx_set_segment(vcpu, &seg, VCPU_SREG_ES); | |
13959 | seg.selector = vmcs12->host_ss_selector; | |
13960 | vmx_set_segment(vcpu, &seg, VCPU_SREG_SS); | |
13961 | seg.selector = vmcs12->host_fs_selector; | |
13962 | seg.base = vmcs12->host_fs_base; | |
13963 | vmx_set_segment(vcpu, &seg, VCPU_SREG_FS); | |
13964 | seg.selector = vmcs12->host_gs_selector; | |
13965 | seg.base = vmcs12->host_gs_base; | |
13966 | vmx_set_segment(vcpu, &seg, VCPU_SREG_GS); | |
13967 | seg = (struct kvm_segment) { | |
205befd9 | 13968 | .base = vmcs12->host_tr_base, |
21feb4eb ACL |
13969 | .limit = 0x67, |
13970 | .selector = vmcs12->host_tr_selector, | |
13971 | .type = 11, | |
13972 | .present = 1 | |
13973 | }; | |
13974 | vmx_set_segment(vcpu, &seg, VCPU_SREG_TR); | |
13975 | ||
503cd0c5 JK |
13976 | kvm_set_dr(vcpu, 7, 0x400); |
13977 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
ff651cb6 | 13978 | |
3af18d9c | 13979 | if (cpu_has_vmx_msr_bitmap()) |
904e14fb | 13980 | vmx_update_msr_bitmap(vcpu); |
3af18d9c | 13981 | |
ff651cb6 WV |
13982 | if (nested_vmx_load_msr(vcpu, vmcs12->vm_exit_msr_load_addr, |
13983 | vmcs12->vm_exit_msr_load_count)) | |
13984 | nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL); | |
4704d0be NHE |
13985 | } |
13986 | ||
bd18bffc SC |
13987 | static inline u64 nested_vmx_get_vmcs01_guest_efer(struct vcpu_vmx *vmx) |
13988 | { | |
13989 | struct shared_msr_entry *efer_msr; | |
13990 | unsigned int i; | |
13991 | ||
13992 | if (vm_entry_controls_get(vmx) & VM_ENTRY_LOAD_IA32_EFER) | |
13993 | return vmcs_read64(GUEST_IA32_EFER); | |
13994 | ||
13995 | if (cpu_has_load_ia32_efer) | |
13996 | return host_efer; | |
13997 | ||
13998 | for (i = 0; i < vmx->msr_autoload.guest.nr; ++i) { | |
13999 | if (vmx->msr_autoload.guest.val[i].index == MSR_EFER) | |
14000 | return vmx->msr_autoload.guest.val[i].value; | |
14001 | } | |
14002 | ||
14003 | efer_msr = find_msr_entry(vmx, MSR_EFER); | |
14004 | if (efer_msr) | |
14005 | return efer_msr->data; | |
14006 | ||
14007 | return host_efer; | |
14008 | } | |
14009 | ||
14010 | static void nested_vmx_restore_host_state(struct kvm_vcpu *vcpu) | |
14011 | { | |
14012 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
14013 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
14014 | struct vmx_msr_entry g, h; | |
14015 | struct msr_data msr; | |
14016 | gpa_t gpa; | |
14017 | u32 i, j; | |
14018 | ||
14019 | vcpu->arch.pat = vmcs_read64(GUEST_IA32_PAT); | |
14020 | ||
14021 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) { | |
14022 | /* | |
14023 | * L1's host DR7 is lost if KVM_GUESTDBG_USE_HW_BP is set | |
14024 | * as vmcs01.GUEST_DR7 contains a userspace defined value | |
14025 | * and vcpu->arch.dr7 is not squirreled away before the | |
14026 | * nested VMENTER (not worth adding a variable in nested_vmx). | |
14027 | */ | |
14028 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
14029 | kvm_set_dr(vcpu, 7, DR7_FIXED_1); | |
14030 | else | |
14031 | WARN_ON(kvm_set_dr(vcpu, 7, vmcs_readl(GUEST_DR7))); | |
14032 | } | |
14033 | ||
14034 | /* | |
14035 | * Note that calling vmx_set_{efer,cr0,cr4} is important as they | |
14036 | * handle a variety of side effects to KVM's software model. | |
14037 | */ | |
14038 | vmx_set_efer(vcpu, nested_vmx_get_vmcs01_guest_efer(vmx)); | |
14039 | ||
14040 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; | |
14041 | vmx_set_cr0(vcpu, vmcs_readl(CR0_READ_SHADOW)); | |
14042 | ||
14043 | vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK); | |
14044 | vmx_set_cr4(vcpu, vmcs_readl(CR4_READ_SHADOW)); | |
14045 | ||
14046 | nested_ept_uninit_mmu_context(vcpu); | |
14047 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); | |
14048 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
14049 | ||
14050 | /* | |
14051 | * Use ept_save_pdptrs(vcpu) to load the MMU's cached PDPTRs | |
14052 | * from vmcs01 (if necessary). The PDPTRs are not loaded on | |
14053 | * VMFail, like everything else we just need to ensure our | |
14054 | * software model is up-to-date. | |
14055 | */ | |
14056 | ept_save_pdptrs(vcpu); | |
14057 | ||
14058 | kvm_mmu_reset_context(vcpu); | |
14059 | ||
14060 | if (cpu_has_vmx_msr_bitmap()) | |
14061 | vmx_update_msr_bitmap(vcpu); | |
14062 | ||
14063 | /* | |
14064 | * This nasty bit of open coding is a compromise between blindly | |
14065 | * loading L1's MSRs using the exit load lists (incorrect emulation | |
14066 | * of VMFail), leaving the nested VM's MSRs in the software model | |
14067 | * (incorrect behavior) and snapshotting the modified MSRs (too | |
14068 | * expensive since the lists are unbound by hardware). For each | |
14069 | * MSR that was (prematurely) loaded from the nested VMEntry load | |
14070 | * list, reload it from the exit load list if it exists and differs | |
14071 | * from the guest value. The intent is to stuff host state as | |
14072 | * silently as possible, not to fully process the exit load list. | |
14073 | */ | |
14074 | msr.host_initiated = false; | |
14075 | for (i = 0; i < vmcs12->vm_entry_msr_load_count; i++) { | |
14076 | gpa = vmcs12->vm_entry_msr_load_addr + (i * sizeof(g)); | |
14077 | if (kvm_vcpu_read_guest(vcpu, gpa, &g, sizeof(g))) { | |
14078 | pr_debug_ratelimited( | |
14079 | "%s read MSR index failed (%u, 0x%08llx)\n", | |
14080 | __func__, i, gpa); | |
14081 | goto vmabort; | |
14082 | } | |
14083 | ||
14084 | for (j = 0; j < vmcs12->vm_exit_msr_load_count; j++) { | |
14085 | gpa = vmcs12->vm_exit_msr_load_addr + (j * sizeof(h)); | |
14086 | if (kvm_vcpu_read_guest(vcpu, gpa, &h, sizeof(h))) { | |
14087 | pr_debug_ratelimited( | |
14088 | "%s read MSR failed (%u, 0x%08llx)\n", | |
14089 | __func__, j, gpa); | |
14090 | goto vmabort; | |
14091 | } | |
14092 | if (h.index != g.index) | |
14093 | continue; | |
14094 | if (h.value == g.value) | |
14095 | break; | |
14096 | ||
14097 | if (nested_vmx_load_msr_check(vcpu, &h)) { | |
14098 | pr_debug_ratelimited( | |
14099 | "%s check failed (%u, 0x%x, 0x%x)\n", | |
14100 | __func__, j, h.index, h.reserved); | |
14101 | goto vmabort; | |
14102 | } | |
14103 | ||
14104 | msr.index = h.index; | |
14105 | msr.data = h.value; | |
14106 | if (kvm_set_msr(vcpu, &msr)) { | |
14107 | pr_debug_ratelimited( | |
14108 | "%s WRMSR failed (%u, 0x%x, 0x%llx)\n", | |
14109 | __func__, j, h.index, h.value); | |
14110 | goto vmabort; | |
14111 | } | |
14112 | } | |
14113 | } | |
14114 | ||
14115 | return; | |
14116 | ||
14117 | vmabort: | |
14118 | nested_vmx_abort(vcpu, VMX_ABORT_LOAD_HOST_MSR_FAIL); | |
14119 | } | |
14120 | ||
4704d0be NHE |
14121 | /* |
14122 | * Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1 | |
14123 | * and modify vmcs12 to make it see what it would expect to see there if | |
14124 | * L2 was its real guest. Must only be called when in L2 (is_guest_mode()) | |
14125 | */ | |
533558bc JK |
14126 | static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, |
14127 | u32 exit_intr_info, | |
14128 | unsigned long exit_qualification) | |
4704d0be NHE |
14129 | { |
14130 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4704d0be NHE |
14131 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
14132 | ||
5f3d5799 JK |
14133 | /* trying to cancel vmlaunch/vmresume is a bug */ |
14134 | WARN_ON_ONCE(vmx->nested.nested_run_pending); | |
14135 | ||
4704d0be | 14136 | leave_guest_mode(vcpu); |
4704d0be | 14137 | |
e79f245d KA |
14138 | if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING) |
14139 | vcpu->arch.tsc_offset -= vmcs12->tsc_offset; | |
14140 | ||
4f350c6d | 14141 | if (likely(!vmx->fail)) { |
72e9cbdb LP |
14142 | if (exit_reason == -1) |
14143 | sync_vmcs12(vcpu, vmcs12); | |
14144 | else | |
14145 | prepare_vmcs12(vcpu, vmcs12, exit_reason, exit_intr_info, | |
14146 | exit_qualification); | |
ff651cb6 | 14147 | |
61ada748 LA |
14148 | /* |
14149 | * Must happen outside of sync_vmcs12() as it will | |
14150 | * also be used to capture vmcs12 cache as part of | |
14151 | * capturing nVMX state for snapshot (migration). | |
14152 | * | |
14153 | * Otherwise, this flush will dirty guest memory at a | |
14154 | * point it is already assumed by user-space to be | |
14155 | * immutable. | |
14156 | */ | |
14157 | nested_flush_cached_shadow_vmcs12(vcpu, vmcs12); | |
14158 | ||
4f350c6d JM |
14159 | if (nested_vmx_store_msr(vcpu, vmcs12->vm_exit_msr_store_addr, |
14160 | vmcs12->vm_exit_msr_store_count)) | |
14161 | nested_vmx_abort(vcpu, VMX_ABORT_SAVE_GUEST_MSR_FAIL); | |
2768c0cc SC |
14162 | } else { |
14163 | /* | |
14164 | * The only expected VM-instruction error is "VM entry with | |
14165 | * invalid control field(s)." Anything else indicates a | |
14166 | * problem with L0. And we should never get here with a | |
14167 | * VMFail of any type if early consistency checks are enabled. | |
14168 | */ | |
14169 | WARN_ON_ONCE(vmcs_read32(VM_INSTRUCTION_ERROR) != | |
14170 | VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
14171 | WARN_ON_ONCE(nested_early_check); | |
4f350c6d | 14172 | } |
cf3215d9 | 14173 | |
1279a6b1 | 14174 | vmx_switch_vmcs(vcpu, &vmx->vmcs01); |
36c3cc42 | 14175 | |
9314006d | 14176 | /* Update any VMCS fields that might have changed while L2 ran */ |
33966dd6 KRW |
14177 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, vmx->msr_autoload.host.nr); |
14178 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, vmx->msr_autoload.guest.nr); | |
ea26e4ec | 14179 | vmcs_write64(TSC_OFFSET, vcpu->arch.tsc_offset); |
f459a707 | 14180 | |
c95ba92a PF |
14181 | if (kvm_has_tsc_control) |
14182 | decache_tsc_multiplier(vmx); | |
4704d0be | 14183 | |
8d860bbe JM |
14184 | if (vmx->nested.change_vmcs01_virtual_apic_mode) { |
14185 | vmx->nested.change_vmcs01_virtual_apic_mode = false; | |
14186 | vmx_set_virtual_apic_mode(vcpu); | |
fb6c8198 JM |
14187 | } else if (!nested_cpu_has_ept(vmcs12) && |
14188 | nested_cpu_has2(vmcs12, | |
14189 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) { | |
a468f2db | 14190 | vmx_flush_tlb(vcpu, true); |
dccbfcf5 | 14191 | } |
4704d0be NHE |
14192 | |
14193 | /* This is needed for same reason as it was needed in prepare_vmcs02 */ | |
14194 | vmx->host_rsp = 0; | |
14195 | ||
14196 | /* Unpin physical memory we referred to in vmcs02 */ | |
14197 | if (vmx->nested.apic_access_page) { | |
53a70daf | 14198 | kvm_release_page_dirty(vmx->nested.apic_access_page); |
48d89b92 | 14199 | vmx->nested.apic_access_page = NULL; |
4704d0be | 14200 | } |
a7c0b07d | 14201 | if (vmx->nested.virtual_apic_page) { |
53a70daf | 14202 | kvm_release_page_dirty(vmx->nested.virtual_apic_page); |
48d89b92 | 14203 | vmx->nested.virtual_apic_page = NULL; |
a7c0b07d | 14204 | } |
705699a1 WV |
14205 | if (vmx->nested.pi_desc_page) { |
14206 | kunmap(vmx->nested.pi_desc_page); | |
53a70daf | 14207 | kvm_release_page_dirty(vmx->nested.pi_desc_page); |
705699a1 WV |
14208 | vmx->nested.pi_desc_page = NULL; |
14209 | vmx->nested.pi_desc = NULL; | |
14210 | } | |
4704d0be | 14211 | |
38b99173 TC |
14212 | /* |
14213 | * We are now running in L2, mmu_notifier will force to reload the | |
14214 | * page's hpa for L2 vmcs. Need to reload it for L1 before entering L1. | |
14215 | */ | |
c83b6d15 | 14216 | kvm_make_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu); |
38b99173 | 14217 | |
945679e3 VK |
14218 | if ((exit_reason != -1) && (enable_shadow_vmcs || vmx->nested.hv_evmcs)) |
14219 | vmx->nested.need_vmcs12_sync = true; | |
b6b8a145 JK |
14220 | |
14221 | /* in case we halted in L2 */ | |
14222 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
4f350c6d JM |
14223 | |
14224 | if (likely(!vmx->fail)) { | |
14225 | /* | |
14226 | * TODO: SDM says that with acknowledge interrupt on | |
14227 | * exit, bit 31 of the VM-exit interrupt information | |
14228 | * (valid interrupt) is always set to 1 on | |
14229 | * EXIT_REASON_EXTERNAL_INTERRUPT, so we shouldn't | |
14230 | * need kvm_cpu_has_interrupt(). See the commit | |
14231 | * message for details. | |
14232 | */ | |
14233 | if (nested_exit_intr_ack_set(vcpu) && | |
14234 | exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT && | |
14235 | kvm_cpu_has_interrupt(vcpu)) { | |
14236 | int irq = kvm_cpu_get_interrupt(vcpu); | |
14237 | WARN_ON(irq < 0); | |
14238 | vmcs12->vm_exit_intr_info = irq | | |
14239 | INTR_INFO_VALID_MASK | INTR_TYPE_EXT_INTR; | |
14240 | } | |
14241 | ||
72e9cbdb LP |
14242 | if (exit_reason != -1) |
14243 | trace_kvm_nested_vmexit_inject(vmcs12->vm_exit_reason, | |
14244 | vmcs12->exit_qualification, | |
14245 | vmcs12->idt_vectoring_info_field, | |
14246 | vmcs12->vm_exit_intr_info, | |
14247 | vmcs12->vm_exit_intr_error_code, | |
14248 | KVM_ISA_VMX); | |
4f350c6d JM |
14249 | |
14250 | load_vmcs12_host_state(vcpu, vmcs12); | |
14251 | ||
14252 | return; | |
14253 | } | |
09abb5e3 | 14254 | |
4f350c6d JM |
14255 | /* |
14256 | * After an early L2 VM-entry failure, we're now back | |
14257 | * in L1 which thinks it just finished a VMLAUNCH or | |
14258 | * VMRESUME instruction, so we need to set the failure | |
14259 | * flag and the VM-instruction error field of the VMCS | |
cb61de2f | 14260 | * accordingly, and skip the emulated instruction. |
4f350c6d | 14261 | */ |
09abb5e3 | 14262 | (void)nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); |
cb61de2f | 14263 | |
bd18bffc SC |
14264 | /* |
14265 | * Restore L1's host state to KVM's software model. We're here | |
14266 | * because a consistency check was caught by hardware, which | |
14267 | * means some amount of guest state has been propagated to KVM's | |
14268 | * model and needs to be unwound to the host's state. | |
14269 | */ | |
14270 | nested_vmx_restore_host_state(vcpu); | |
5af41573 | 14271 | |
4f350c6d | 14272 | vmx->fail = 0; |
4704d0be NHE |
14273 | } |
14274 | ||
42124925 JK |
14275 | /* |
14276 | * Forcibly leave nested mode in order to be able to reset the VCPU later on. | |
14277 | */ | |
14278 | static void vmx_leave_nested(struct kvm_vcpu *vcpu) | |
14279 | { | |
2f707d97 WL |
14280 | if (is_guest_mode(vcpu)) { |
14281 | to_vmx(vcpu)->nested.nested_run_pending = 0; | |
533558bc | 14282 | nested_vmx_vmexit(vcpu, -1, 0, 0); |
2f707d97 | 14283 | } |
14c07ad8 | 14284 | free_nested(vcpu); |
42124925 JK |
14285 | } |
14286 | ||
8a76d7f2 JR |
14287 | static int vmx_check_intercept(struct kvm_vcpu *vcpu, |
14288 | struct x86_instruction_info *info, | |
14289 | enum x86_intercept_stage stage) | |
14290 | { | |
fb6d4d34 PB |
14291 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
14292 | struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt; | |
14293 | ||
14294 | /* | |
14295 | * RDPID causes #UD if disabled through secondary execution controls. | |
14296 | * Because it is marked as EmulateOnUD, we need to intercept it here. | |
14297 | */ | |
14298 | if (info->intercept == x86_intercept_rdtscp && | |
14299 | !nested_cpu_has2(vmcs12, SECONDARY_EXEC_RDTSCP)) { | |
14300 | ctxt->exception.vector = UD_VECTOR; | |
14301 | ctxt->exception.error_code_valid = false; | |
14302 | return X86EMUL_PROPAGATE_FAULT; | |
14303 | } | |
14304 | ||
14305 | /* TODO: check more intercepts... */ | |
8a76d7f2 JR |
14306 | return X86EMUL_CONTINUE; |
14307 | } | |
14308 | ||
64672c95 YJ |
14309 | #ifdef CONFIG_X86_64 |
14310 | /* (a << shift) / divisor, return 1 if overflow otherwise 0 */ | |
14311 | static inline int u64_shl_div_u64(u64 a, unsigned int shift, | |
14312 | u64 divisor, u64 *result) | |
14313 | { | |
14314 | u64 low = a << shift, high = a >> (64 - shift); | |
14315 | ||
14316 | /* To avoid the overflow on divq */ | |
14317 | if (high >= divisor) | |
14318 | return 1; | |
14319 | ||
14320 | /* Low hold the result, high hold rem which is discarded */ | |
14321 | asm("divq %2\n\t" : "=a" (low), "=d" (high) : | |
14322 | "rm" (divisor), "0" (low), "1" (high)); | |
14323 | *result = low; | |
14324 | ||
14325 | return 0; | |
14326 | } | |
14327 | ||
14328 | static int vmx_set_hv_timer(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc) | |
14329 | { | |
386c6ddb | 14330 | struct vcpu_vmx *vmx; |
c5ce8235 | 14331 | u64 tscl, guest_tscl, delta_tsc, lapic_timer_advance_cycles; |
386c6ddb KA |
14332 | |
14333 | if (kvm_mwait_in_guest(vcpu->kvm)) | |
14334 | return -EOPNOTSUPP; | |
14335 | ||
14336 | vmx = to_vmx(vcpu); | |
14337 | tscl = rdtsc(); | |
14338 | guest_tscl = kvm_read_l1_tsc(vcpu, tscl); | |
14339 | delta_tsc = max(guest_deadline_tsc, guest_tscl) - guest_tscl; | |
c5ce8235 WL |
14340 | lapic_timer_advance_cycles = nsec_to_cycles(vcpu, lapic_timer_advance_ns); |
14341 | ||
14342 | if (delta_tsc > lapic_timer_advance_cycles) | |
14343 | delta_tsc -= lapic_timer_advance_cycles; | |
14344 | else | |
14345 | delta_tsc = 0; | |
64672c95 YJ |
14346 | |
14347 | /* Convert to host delta tsc if tsc scaling is enabled */ | |
14348 | if (vcpu->arch.tsc_scaling_ratio != kvm_default_tsc_scaling_ratio && | |
14349 | u64_shl_div_u64(delta_tsc, | |
14350 | kvm_tsc_scaling_ratio_frac_bits, | |
14351 | vcpu->arch.tsc_scaling_ratio, | |
14352 | &delta_tsc)) | |
14353 | return -ERANGE; | |
14354 | ||
14355 | /* | |
14356 | * If the delta tsc can't fit in the 32 bit after the multi shift, | |
14357 | * we can't use the preemption timer. | |
14358 | * It's possible that it fits on later vmentries, but checking | |
14359 | * on every vmentry is costly so we just use an hrtimer. | |
14360 | */ | |
14361 | if (delta_tsc >> (cpu_preemption_timer_multi + 32)) | |
14362 | return -ERANGE; | |
14363 | ||
14364 | vmx->hv_deadline_tsc = tscl + delta_tsc; | |
c8533544 | 14365 | return delta_tsc == 0; |
64672c95 YJ |
14366 | } |
14367 | ||
14368 | static void vmx_cancel_hv_timer(struct kvm_vcpu *vcpu) | |
14369 | { | |
f459a707 | 14370 | to_vmx(vcpu)->hv_deadline_tsc = -1; |
64672c95 YJ |
14371 | } |
14372 | #endif | |
14373 | ||
48d89b92 | 14374 | static void vmx_sched_in(struct kvm_vcpu *vcpu, int cpu) |
ae97a3b8 | 14375 | { |
b31c114b | 14376 | if (!kvm_pause_in_guest(vcpu->kvm)) |
b4a2d31d | 14377 | shrink_ple_window(vcpu); |
ae97a3b8 RK |
14378 | } |
14379 | ||
843e4330 KH |
14380 | static void vmx_slot_enable_log_dirty(struct kvm *kvm, |
14381 | struct kvm_memory_slot *slot) | |
14382 | { | |
14383 | kvm_mmu_slot_leaf_clear_dirty(kvm, slot); | |
14384 | kvm_mmu_slot_largepage_remove_write_access(kvm, slot); | |
14385 | } | |
14386 | ||
14387 | static void vmx_slot_disable_log_dirty(struct kvm *kvm, | |
14388 | struct kvm_memory_slot *slot) | |
14389 | { | |
14390 | kvm_mmu_slot_set_dirty(kvm, slot); | |
14391 | } | |
14392 | ||
14393 | static void vmx_flush_log_dirty(struct kvm *kvm) | |
14394 | { | |
14395 | kvm_flush_pml_buffers(kvm); | |
14396 | } | |
14397 | ||
c5f983f6 BD |
14398 | static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu) |
14399 | { | |
14400 | struct vmcs12 *vmcs12; | |
14401 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
14402 | gpa_t gpa; | |
14403 | struct page *page = NULL; | |
14404 | u64 *pml_address; | |
14405 | ||
14406 | if (is_guest_mode(vcpu)) { | |
14407 | WARN_ON_ONCE(vmx->nested.pml_full); | |
14408 | ||
14409 | /* | |
14410 | * Check if PML is enabled for the nested guest. | |
14411 | * Whether eptp bit 6 is set is already checked | |
14412 | * as part of A/D emulation. | |
14413 | */ | |
14414 | vmcs12 = get_vmcs12(vcpu); | |
14415 | if (!nested_cpu_has_pml(vmcs12)) | |
14416 | return 0; | |
14417 | ||
4769886b | 14418 | if (vmcs12->guest_pml_index >= PML_ENTITY_NUM) { |
c5f983f6 BD |
14419 | vmx->nested.pml_full = true; |
14420 | return 1; | |
14421 | } | |
14422 | ||
14423 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS) & ~0xFFFull; | |
14424 | ||
5e2f30b7 DH |
14425 | page = kvm_vcpu_gpa_to_page(vcpu, vmcs12->pml_address); |
14426 | if (is_error_page(page)) | |
c5f983f6 BD |
14427 | return 0; |
14428 | ||
14429 | pml_address = kmap(page); | |
14430 | pml_address[vmcs12->guest_pml_index--] = gpa; | |
14431 | kunmap(page); | |
53a70daf | 14432 | kvm_release_page_clean(page); |
c5f983f6 BD |
14433 | } |
14434 | ||
14435 | return 0; | |
14436 | } | |
14437 | ||
843e4330 KH |
14438 | static void vmx_enable_log_dirty_pt_masked(struct kvm *kvm, |
14439 | struct kvm_memory_slot *memslot, | |
14440 | gfn_t offset, unsigned long mask) | |
14441 | { | |
14442 | kvm_mmu_clear_dirty_pt_masked(kvm, memslot, offset, mask); | |
14443 | } | |
14444 | ||
cd39e117 PB |
14445 | static void __pi_post_block(struct kvm_vcpu *vcpu) |
14446 | { | |
14447 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
14448 | struct pi_desc old, new; | |
14449 | unsigned int dest; | |
cd39e117 PB |
14450 | |
14451 | do { | |
14452 | old.control = new.control = pi_desc->control; | |
8b306e2f PB |
14453 | WARN(old.nv != POSTED_INTR_WAKEUP_VECTOR, |
14454 | "Wakeup handler not enabled while the VCPU is blocked\n"); | |
cd39e117 PB |
14455 | |
14456 | dest = cpu_physical_id(vcpu->cpu); | |
14457 | ||
14458 | if (x2apic_enabled()) | |
14459 | new.ndst = dest; | |
14460 | else | |
14461 | new.ndst = (dest << 8) & 0xFF00; | |
14462 | ||
cd39e117 PB |
14463 | /* set 'NV' to 'notification vector' */ |
14464 | new.nv = POSTED_INTR_VECTOR; | |
c0a1666b PB |
14465 | } while (cmpxchg64(&pi_desc->control, old.control, |
14466 | new.control) != old.control); | |
cd39e117 | 14467 | |
8b306e2f PB |
14468 | if (!WARN_ON_ONCE(vcpu->pre_pcpu == -1)) { |
14469 | spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu)); | |
cd39e117 | 14470 | list_del(&vcpu->blocked_vcpu_list); |
8b306e2f | 14471 | spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu)); |
cd39e117 PB |
14472 | vcpu->pre_pcpu = -1; |
14473 | } | |
14474 | } | |
14475 | ||
bf9f6ac8 FW |
14476 | /* |
14477 | * This routine does the following things for vCPU which is going | |
14478 | * to be blocked if VT-d PI is enabled. | |
14479 | * - Store the vCPU to the wakeup list, so when interrupts happen | |
14480 | * we can find the right vCPU to wake up. | |
14481 | * - Change the Posted-interrupt descriptor as below: | |
14482 | * 'NDST' <-- vcpu->pre_pcpu | |
14483 | * 'NV' <-- POSTED_INTR_WAKEUP_VECTOR | |
14484 | * - If 'ON' is set during this process, which means at least one | |
14485 | * interrupt is posted for this vCPU, we cannot block it, in | |
14486 | * this case, return 1, otherwise, return 0. | |
14487 | * | |
14488 | */ | |
bc22512b | 14489 | static int pi_pre_block(struct kvm_vcpu *vcpu) |
bf9f6ac8 | 14490 | { |
bf9f6ac8 FW |
14491 | unsigned int dest; |
14492 | struct pi_desc old, new; | |
14493 | struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu); | |
14494 | ||
14495 | if (!kvm_arch_has_assigned_device(vcpu->kvm) || | |
a0052191 YZ |
14496 | !irq_remapping_cap(IRQ_POSTING_CAP) || |
14497 | !kvm_vcpu_apicv_active(vcpu)) | |
bf9f6ac8 FW |
14498 | return 0; |
14499 | ||
8b306e2f PB |
14500 | WARN_ON(irqs_disabled()); |
14501 | local_irq_disable(); | |
14502 | if (!WARN_ON_ONCE(vcpu->pre_pcpu != -1)) { | |
14503 | vcpu->pre_pcpu = vcpu->cpu; | |
14504 | spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu)); | |
14505 | list_add_tail(&vcpu->blocked_vcpu_list, | |
14506 | &per_cpu(blocked_vcpu_on_cpu, | |
14507 | vcpu->pre_pcpu)); | |
14508 | spin_unlock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->pre_pcpu)); | |
14509 | } | |
bf9f6ac8 FW |
14510 | |
14511 | do { | |
14512 | old.control = new.control = pi_desc->control; | |
14513 | ||
bf9f6ac8 FW |
14514 | WARN((pi_desc->sn == 1), |
14515 | "Warning: SN field of posted-interrupts " | |
14516 | "is set before blocking\n"); | |
14517 | ||
14518 | /* | |
14519 | * Since vCPU can be preempted during this process, | |
14520 | * vcpu->cpu could be different with pre_pcpu, we | |
14521 | * need to set pre_pcpu as the destination of wakeup | |
14522 | * notification event, then we can find the right vCPU | |
14523 | * to wakeup in wakeup handler if interrupts happen | |
14524 | * when the vCPU is in blocked state. | |
14525 | */ | |
14526 | dest = cpu_physical_id(vcpu->pre_pcpu); | |
14527 | ||
14528 | if (x2apic_enabled()) | |
14529 | new.ndst = dest; | |
14530 | else | |
14531 | new.ndst = (dest << 8) & 0xFF00; | |
14532 | ||
14533 | /* set 'NV' to 'wakeup vector' */ | |
14534 | new.nv = POSTED_INTR_WAKEUP_VECTOR; | |
c0a1666b PB |
14535 | } while (cmpxchg64(&pi_desc->control, old.control, |
14536 | new.control) != old.control); | |
bf9f6ac8 | 14537 | |
8b306e2f PB |
14538 | /* We should not block the vCPU if an interrupt is posted for it. */ |
14539 | if (pi_test_on(pi_desc) == 1) | |
14540 | __pi_post_block(vcpu); | |
14541 | ||
14542 | local_irq_enable(); | |
14543 | return (vcpu->pre_pcpu == -1); | |
bf9f6ac8 FW |
14544 | } |
14545 | ||
bc22512b YJ |
14546 | static int vmx_pre_block(struct kvm_vcpu *vcpu) |
14547 | { | |
14548 | if (pi_pre_block(vcpu)) | |
14549 | return 1; | |
14550 | ||
64672c95 YJ |
14551 | if (kvm_lapic_hv_timer_in_use(vcpu)) |
14552 | kvm_lapic_switch_to_sw_timer(vcpu); | |
14553 | ||
bc22512b YJ |
14554 | return 0; |
14555 | } | |
14556 | ||
14557 | static void pi_post_block(struct kvm_vcpu *vcpu) | |
bf9f6ac8 | 14558 | { |
8b306e2f | 14559 | if (vcpu->pre_pcpu == -1) |
bf9f6ac8 FW |
14560 | return; |
14561 | ||
8b306e2f PB |
14562 | WARN_ON(irqs_disabled()); |
14563 | local_irq_disable(); | |
cd39e117 | 14564 | __pi_post_block(vcpu); |
8b306e2f | 14565 | local_irq_enable(); |
bf9f6ac8 FW |
14566 | } |
14567 | ||
bc22512b YJ |
14568 | static void vmx_post_block(struct kvm_vcpu *vcpu) |
14569 | { | |
64672c95 YJ |
14570 | if (kvm_x86_ops->set_hv_timer) |
14571 | kvm_lapic_switch_to_hv_timer(vcpu); | |
14572 | ||
bc22512b YJ |
14573 | pi_post_block(vcpu); |
14574 | } | |
14575 | ||
efc64404 FW |
14576 | /* |
14577 | * vmx_update_pi_irte - set IRTE for Posted-Interrupts | |
14578 | * | |
14579 | * @kvm: kvm | |
14580 | * @host_irq: host irq of the interrupt | |
14581 | * @guest_irq: gsi of the interrupt | |
14582 | * @set: set or unset PI | |
14583 | * returns 0 on success, < 0 on failure | |
14584 | */ | |
14585 | static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq, | |
14586 | uint32_t guest_irq, bool set) | |
14587 | { | |
14588 | struct kvm_kernel_irq_routing_entry *e; | |
14589 | struct kvm_irq_routing_table *irq_rt; | |
14590 | struct kvm_lapic_irq irq; | |
14591 | struct kvm_vcpu *vcpu; | |
14592 | struct vcpu_data vcpu_info; | |
3a8b0677 | 14593 | int idx, ret = 0; |
efc64404 FW |
14594 | |
14595 | if (!kvm_arch_has_assigned_device(kvm) || | |
a0052191 YZ |
14596 | !irq_remapping_cap(IRQ_POSTING_CAP) || |
14597 | !kvm_vcpu_apicv_active(kvm->vcpus[0])) | |
efc64404 FW |
14598 | return 0; |
14599 | ||
14600 | idx = srcu_read_lock(&kvm->irq_srcu); | |
14601 | irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu); | |
3a8b0677 JS |
14602 | if (guest_irq >= irq_rt->nr_rt_entries || |
14603 | hlist_empty(&irq_rt->map[guest_irq])) { | |
14604 | pr_warn_once("no route for guest_irq %u/%u (broken user space?)\n", | |
14605 | guest_irq, irq_rt->nr_rt_entries); | |
14606 | goto out; | |
14607 | } | |
efc64404 FW |
14608 | |
14609 | hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) { | |
14610 | if (e->type != KVM_IRQ_ROUTING_MSI) | |
14611 | continue; | |
14612 | /* | |
14613 | * VT-d PI cannot support posting multicast/broadcast | |
14614 | * interrupts to a vCPU, we still use interrupt remapping | |
14615 | * for these kind of interrupts. | |
14616 | * | |
14617 | * For lowest-priority interrupts, we only support | |
14618 | * those with single CPU as the destination, e.g. user | |
14619 | * configures the interrupts via /proc/irq or uses | |
14620 | * irqbalance to make the interrupts single-CPU. | |
14621 | * | |
14622 | * We will support full lowest-priority interrupt later. | |
14623 | */ | |
14624 | ||
37131313 | 14625 | kvm_set_msi_irq(kvm, e, &irq); |
23a1c257 FW |
14626 | if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) { |
14627 | /* | |
14628 | * Make sure the IRTE is in remapped mode if | |
14629 | * we don't handle it in posted mode. | |
14630 | */ | |
14631 | ret = irq_set_vcpu_affinity(host_irq, NULL); | |
14632 | if (ret < 0) { | |
14633 | printk(KERN_INFO | |
14634 | "failed to back to remapped mode, irq: %u\n", | |
14635 | host_irq); | |
14636 | goto out; | |
14637 | } | |
14638 | ||
efc64404 | 14639 | continue; |
23a1c257 | 14640 | } |
efc64404 FW |
14641 | |
14642 | vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu)); | |
14643 | vcpu_info.vector = irq.vector; | |
14644 | ||
2698d82e | 14645 | trace_kvm_pi_irte_update(host_irq, vcpu->vcpu_id, e->gsi, |
efc64404 FW |
14646 | vcpu_info.vector, vcpu_info.pi_desc_addr, set); |
14647 | ||
14648 | if (set) | |
14649 | ret = irq_set_vcpu_affinity(host_irq, &vcpu_info); | |
dc91f2eb | 14650 | else |
efc64404 | 14651 | ret = irq_set_vcpu_affinity(host_irq, NULL); |
efc64404 FW |
14652 | |
14653 | if (ret < 0) { | |
14654 | printk(KERN_INFO "%s: failed to update PI IRTE\n", | |
14655 | __func__); | |
14656 | goto out; | |
14657 | } | |
14658 | } | |
14659 | ||
14660 | ret = 0; | |
14661 | out: | |
14662 | srcu_read_unlock(&kvm->irq_srcu, idx); | |
14663 | return ret; | |
14664 | } | |
14665 | ||
c45dcc71 AR |
14666 | static void vmx_setup_mce(struct kvm_vcpu *vcpu) |
14667 | { | |
14668 | if (vcpu->arch.mcg_cap & MCG_LMCE_P) | |
14669 | to_vmx(vcpu)->msr_ia32_feature_control_valid_bits |= | |
14670 | FEATURE_CONTROL_LMCE; | |
14671 | else | |
14672 | to_vmx(vcpu)->msr_ia32_feature_control_valid_bits &= | |
14673 | ~FEATURE_CONTROL_LMCE; | |
14674 | } | |
14675 | ||
72d7b374 LP |
14676 | static int vmx_smi_allowed(struct kvm_vcpu *vcpu) |
14677 | { | |
72e9cbdb LP |
14678 | /* we need a nested vmexit to enter SMM, postpone if run is pending */ |
14679 | if (to_vmx(vcpu)->nested.nested_run_pending) | |
14680 | return 0; | |
72d7b374 LP |
14681 | return 1; |
14682 | } | |
14683 | ||
0234bf88 LP |
14684 | static int vmx_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate) |
14685 | { | |
72e9cbdb LP |
14686 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
14687 | ||
14688 | vmx->nested.smm.guest_mode = is_guest_mode(vcpu); | |
14689 | if (vmx->nested.smm.guest_mode) | |
14690 | nested_vmx_vmexit(vcpu, -1, 0, 0); | |
14691 | ||
14692 | vmx->nested.smm.vmxon = vmx->nested.vmxon; | |
14693 | vmx->nested.vmxon = false; | |
caa057a2 | 14694 | vmx_clear_hlt(vcpu); |
0234bf88 LP |
14695 | return 0; |
14696 | } | |
14697 | ||
14698 | static int vmx_pre_leave_smm(struct kvm_vcpu *vcpu, u64 smbase) | |
14699 | { | |
72e9cbdb LP |
14700 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
14701 | int ret; | |
14702 | ||
14703 | if (vmx->nested.smm.vmxon) { | |
14704 | vmx->nested.vmxon = true; | |
14705 | vmx->nested.smm.vmxon = false; | |
14706 | } | |
14707 | ||
14708 | if (vmx->nested.smm.guest_mode) { | |
14709 | vcpu->arch.hflags &= ~HF_SMM_MASK; | |
a633e41e | 14710 | ret = nested_vmx_enter_non_root_mode(vcpu, false); |
72e9cbdb LP |
14711 | vcpu->arch.hflags |= HF_SMM_MASK; |
14712 | if (ret) | |
14713 | return ret; | |
14714 | ||
14715 | vmx->nested.smm.guest_mode = false; | |
14716 | } | |
0234bf88 LP |
14717 | return 0; |
14718 | } | |
14719 | ||
cc3d967f LP |
14720 | static int enable_smi_window(struct kvm_vcpu *vcpu) |
14721 | { | |
14722 | return 0; | |
14723 | } | |
14724 | ||
8cab6507 VK |
14725 | static inline int vmx_has_valid_vmcs12(struct kvm_vcpu *vcpu) |
14726 | { | |
14727 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
14728 | ||
14729 | /* | |
14730 | * In case we do two consecutive get/set_nested_state()s while L2 was | |
14731 | * running hv_evmcs may end up not being mapped (we map it from | |
14732 | * nested_vmx_run()/vmx_vcpu_run()). Check is_guest_mode() as we always | |
14733 | * have vmcs12 if it is true. | |
14734 | */ | |
14735 | return is_guest_mode(vcpu) || vmx->nested.current_vmptr != -1ull || | |
14736 | vmx->nested.hv_evmcs; | |
14737 | } | |
14738 | ||
8fcc4b59 JM |
14739 | static int vmx_get_nested_state(struct kvm_vcpu *vcpu, |
14740 | struct kvm_nested_state __user *user_kvm_nested_state, | |
14741 | u32 user_data_size) | |
14742 | { | |
14743 | struct vcpu_vmx *vmx; | |
14744 | struct vmcs12 *vmcs12; | |
14745 | struct kvm_nested_state kvm_state = { | |
14746 | .flags = 0, | |
14747 | .format = 0, | |
14748 | .size = sizeof(kvm_state), | |
14749 | .vmx.vmxon_pa = -1ull, | |
14750 | .vmx.vmcs_pa = -1ull, | |
14751 | }; | |
14752 | ||
14753 | if (!vcpu) | |
14754 | return kvm_state.size + 2 * VMCS12_SIZE; | |
14755 | ||
14756 | vmx = to_vmx(vcpu); | |
14757 | vmcs12 = get_vmcs12(vcpu); | |
945679e3 | 14758 | |
8cab6507 VK |
14759 | if (nested_vmx_allowed(vcpu) && vmx->nested.enlightened_vmcs_enabled) |
14760 | kvm_state.flags |= KVM_STATE_NESTED_EVMCS; | |
945679e3 | 14761 | |
8fcc4b59 JM |
14762 | if (nested_vmx_allowed(vcpu) && |
14763 | (vmx->nested.vmxon || vmx->nested.smm.vmxon)) { | |
14764 | kvm_state.vmx.vmxon_pa = vmx->nested.vmxon_ptr; | |
14765 | kvm_state.vmx.vmcs_pa = vmx->nested.current_vmptr; | |
14766 | ||
8cab6507 | 14767 | if (vmx_has_valid_vmcs12(vcpu)) { |
8fcc4b59 JM |
14768 | kvm_state.size += VMCS12_SIZE; |
14769 | ||
fa58a9fa PB |
14770 | if (is_guest_mode(vcpu) && |
14771 | nested_cpu_has_shadow_vmcs(vmcs12) && | |
14772 | vmcs12->vmcs_link_pointer != -1ull) | |
14773 | kvm_state.size += VMCS12_SIZE; | |
14774 | } | |
14775 | ||
8fcc4b59 JM |
14776 | if (vmx->nested.smm.vmxon) |
14777 | kvm_state.vmx.smm.flags |= KVM_STATE_NESTED_SMM_VMXON; | |
14778 | ||
14779 | if (vmx->nested.smm.guest_mode) | |
14780 | kvm_state.vmx.smm.flags |= KVM_STATE_NESTED_SMM_GUEST_MODE; | |
14781 | ||
14782 | if (is_guest_mode(vcpu)) { | |
14783 | kvm_state.flags |= KVM_STATE_NESTED_GUEST_MODE; | |
14784 | ||
14785 | if (vmx->nested.nested_run_pending) | |
14786 | kvm_state.flags |= KVM_STATE_NESTED_RUN_PENDING; | |
14787 | } | |
14788 | } | |
14789 | ||
14790 | if (user_data_size < kvm_state.size) | |
14791 | goto out; | |
14792 | ||
14793 | if (copy_to_user(user_kvm_nested_state, &kvm_state, sizeof(kvm_state))) | |
14794 | return -EFAULT; | |
14795 | ||
8cab6507 | 14796 | if (!vmx_has_valid_vmcs12(vcpu)) |
8fcc4b59 JM |
14797 | goto out; |
14798 | ||
14799 | /* | |
14800 | * When running L2, the authoritative vmcs12 state is in the | |
14801 | * vmcs02. When running L1, the authoritative vmcs12 state is | |
8cab6507 | 14802 | * in the shadow or enlightened vmcs linked to vmcs01, unless |
945679e3 | 14803 | * need_vmcs12_sync is set, in which case, the authoritative |
8fcc4b59 JM |
14804 | * vmcs12 state is in the vmcs12 already. |
14805 | */ | |
8cab6507 | 14806 | if (is_guest_mode(vcpu)) { |
8fcc4b59 | 14807 | sync_vmcs12(vcpu, vmcs12); |
8cab6507 VK |
14808 | } else if (!vmx->nested.need_vmcs12_sync) { |
14809 | if (vmx->nested.hv_evmcs) | |
14810 | copy_enlightened_to_vmcs12(vmx); | |
14811 | else if (enable_shadow_vmcs) | |
14812 | copy_shadow_to_vmcs12(vmx); | |
14813 | } | |
8fcc4b59 JM |
14814 | |
14815 | if (copy_to_user(user_kvm_nested_state->data, vmcs12, sizeof(*vmcs12))) | |
14816 | return -EFAULT; | |
14817 | ||
fa58a9fa PB |
14818 | if (nested_cpu_has_shadow_vmcs(vmcs12) && |
14819 | vmcs12->vmcs_link_pointer != -1ull) { | |
14820 | if (copy_to_user(user_kvm_nested_state->data + VMCS12_SIZE, | |
14821 | get_shadow_vmcs12(vcpu), sizeof(*vmcs12))) | |
14822 | return -EFAULT; | |
14823 | } | |
14824 | ||
8fcc4b59 JM |
14825 | out: |
14826 | return kvm_state.size; | |
14827 | } | |
14828 | ||
14829 | static int vmx_set_nested_state(struct kvm_vcpu *vcpu, | |
14830 | struct kvm_nested_state __user *user_kvm_nested_state, | |
14831 | struct kvm_nested_state *kvm_state) | |
14832 | { | |
14833 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
14834 | struct vmcs12 *vmcs12; | |
14835 | u32 exit_qual; | |
14836 | int ret; | |
14837 | ||
14838 | if (kvm_state->format != 0) | |
14839 | return -EINVAL; | |
14840 | ||
8cab6507 VK |
14841 | if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) |
14842 | nested_enable_evmcs(vcpu, NULL); | |
14843 | ||
8fcc4b59 JM |
14844 | if (!nested_vmx_allowed(vcpu)) |
14845 | return kvm_state->vmx.vmxon_pa == -1ull ? 0 : -EINVAL; | |
14846 | ||
14847 | if (kvm_state->vmx.vmxon_pa == -1ull) { | |
14848 | if (kvm_state->vmx.smm.flags) | |
14849 | return -EINVAL; | |
14850 | ||
14851 | if (kvm_state->vmx.vmcs_pa != -1ull) | |
14852 | return -EINVAL; | |
14853 | ||
14854 | vmx_leave_nested(vcpu); | |
14855 | return 0; | |
14856 | } | |
14857 | ||
14858 | if (!page_address_valid(vcpu, kvm_state->vmx.vmxon_pa)) | |
14859 | return -EINVAL; | |
14860 | ||
8fcc4b59 JM |
14861 | if ((kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) && |
14862 | (kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE)) | |
14863 | return -EINVAL; | |
14864 | ||
14865 | if (kvm_state->vmx.smm.flags & | |
14866 | ~(KVM_STATE_NESTED_SMM_GUEST_MODE | KVM_STATE_NESTED_SMM_VMXON)) | |
14867 | return -EINVAL; | |
14868 | ||
5bea5123 PB |
14869 | /* |
14870 | * SMM temporarily disables VMX, so we cannot be in guest mode, | |
14871 | * nor can VMLAUNCH/VMRESUME be pending. Outside SMM, SMM flags | |
14872 | * must be zero. | |
14873 | */ | |
14874 | if (is_smm(vcpu) ? kvm_state->flags : kvm_state->vmx.smm.flags) | |
14875 | return -EINVAL; | |
14876 | ||
8fcc4b59 JM |
14877 | if ((kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) && |
14878 | !(kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON)) | |
14879 | return -EINVAL; | |
14880 | ||
14881 | vmx_leave_nested(vcpu); | |
14882 | if (kvm_state->vmx.vmxon_pa == -1ull) | |
14883 | return 0; | |
14884 | ||
14885 | vmx->nested.vmxon_ptr = kvm_state->vmx.vmxon_pa; | |
14886 | ret = enter_vmx_operation(vcpu); | |
14887 | if (ret) | |
14888 | return ret; | |
14889 | ||
a1b0c1c6 VK |
14890 | /* Empty 'VMXON' state is permitted */ |
14891 | if (kvm_state->size < sizeof(kvm_state) + sizeof(*vmcs12)) | |
14892 | return 0; | |
14893 | ||
8cab6507 VK |
14894 | if (kvm_state->vmx.vmcs_pa != -1ull) { |
14895 | if (kvm_state->vmx.vmcs_pa == kvm_state->vmx.vmxon_pa || | |
14896 | !page_address_valid(vcpu, kvm_state->vmx.vmcs_pa)) | |
14897 | return -EINVAL; | |
a1b0c1c6 | 14898 | |
8cab6507 VK |
14899 | set_current_vmptr(vmx, kvm_state->vmx.vmcs_pa); |
14900 | } else if (kvm_state->flags & KVM_STATE_NESTED_EVMCS) { | |
14901 | /* | |
14902 | * Sync eVMCS upon entry as we may not have | |
14903 | * HV_X64_MSR_VP_ASSIST_PAGE set up yet. | |
14904 | */ | |
14905 | vmx->nested.need_vmcs12_sync = true; | |
14906 | } else { | |
14907 | return -EINVAL; | |
14908 | } | |
8fcc4b59 JM |
14909 | |
14910 | if (kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_VMXON) { | |
14911 | vmx->nested.smm.vmxon = true; | |
14912 | vmx->nested.vmxon = false; | |
14913 | ||
14914 | if (kvm_state->vmx.smm.flags & KVM_STATE_NESTED_SMM_GUEST_MODE) | |
14915 | vmx->nested.smm.guest_mode = true; | |
14916 | } | |
14917 | ||
14918 | vmcs12 = get_vmcs12(vcpu); | |
14919 | if (copy_from_user(vmcs12, user_kvm_nested_state->data, sizeof(*vmcs12))) | |
14920 | return -EFAULT; | |
14921 | ||
392b2f25 | 14922 | if (vmcs12->hdr.revision_id != VMCS12_REVISION) |
8fcc4b59 JM |
14923 | return -EINVAL; |
14924 | ||
14925 | if (!(kvm_state->flags & KVM_STATE_NESTED_GUEST_MODE)) | |
14926 | return 0; | |
14927 | ||
14928 | vmx->nested.nested_run_pending = | |
14929 | !!(kvm_state->flags & KVM_STATE_NESTED_RUN_PENDING); | |
14930 | ||
fa58a9fa PB |
14931 | if (nested_cpu_has_shadow_vmcs(vmcs12) && |
14932 | vmcs12->vmcs_link_pointer != -1ull) { | |
14933 | struct vmcs12 *shadow_vmcs12 = get_shadow_vmcs12(vcpu); | |
14934 | if (kvm_state->size < sizeof(kvm_state) + 2 * sizeof(*vmcs12)) | |
14935 | return -EINVAL; | |
14936 | ||
14937 | if (copy_from_user(shadow_vmcs12, | |
14938 | user_kvm_nested_state->data + VMCS12_SIZE, | |
14939 | sizeof(*vmcs12))) | |
14940 | return -EFAULT; | |
14941 | ||
14942 | if (shadow_vmcs12->hdr.revision_id != VMCS12_REVISION || | |
14943 | !shadow_vmcs12->hdr.shadow_vmcs) | |
14944 | return -EINVAL; | |
14945 | } | |
14946 | ||
8fcc4b59 JM |
14947 | if (check_vmentry_prereqs(vcpu, vmcs12) || |
14948 | check_vmentry_postreqs(vcpu, vmcs12, &exit_qual)) | |
14949 | return -EINVAL; | |
14950 | ||
8fcc4b59 | 14951 | vmx->nested.dirty_vmcs12 = true; |
a633e41e | 14952 | ret = nested_vmx_enter_non_root_mode(vcpu, false); |
8fcc4b59 JM |
14953 | if (ret) |
14954 | return -EINVAL; | |
14955 | ||
14956 | return 0; | |
14957 | } | |
14958 | ||
404f6aac | 14959 | static struct kvm_x86_ops vmx_x86_ops __ro_after_init = { |
6aa8b732 AK |
14960 | .cpu_has_kvm_support = cpu_has_kvm_support, |
14961 | .disabled_by_bios = vmx_disabled_by_bios, | |
14962 | .hardware_setup = hardware_setup, | |
14963 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 14964 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
14965 | .hardware_enable = hardware_enable, |
14966 | .hardware_disable = hardware_disable, | |
04547156 | 14967 | .cpu_has_accelerated_tpr = report_flexpriority, |
bc226f07 | 14968 | .has_emulated_msr = vmx_has_emulated_msr, |
6aa8b732 | 14969 | |
b31c114b | 14970 | .vm_init = vmx_vm_init, |
434a1e94 SC |
14971 | .vm_alloc = vmx_vm_alloc, |
14972 | .vm_free = vmx_vm_free, | |
b31c114b | 14973 | |
6aa8b732 AK |
14974 | .vcpu_create = vmx_create_vcpu, |
14975 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 14976 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 14977 | |
6d6095bd | 14978 | .prepare_guest_switch = vmx_prepare_switch_to_guest, |
6aa8b732 AK |
14979 | .vcpu_load = vmx_vcpu_load, |
14980 | .vcpu_put = vmx_vcpu_put, | |
14981 | ||
a96036b8 | 14982 | .update_bp_intercept = update_exception_bitmap, |
801e459a | 14983 | .get_msr_feature = vmx_get_msr_feature, |
6aa8b732 AK |
14984 | .get_msr = vmx_get_msr, |
14985 | .set_msr = vmx_set_msr, | |
14986 | .get_segment_base = vmx_get_segment_base, | |
14987 | .get_segment = vmx_get_segment, | |
14988 | .set_segment = vmx_set_segment, | |
2e4d2653 | 14989 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 14990 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
e8467fda | 14991 | .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, |
aff48baa | 14992 | .decache_cr3 = vmx_decache_cr3, |
25c4c276 | 14993 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 14994 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
14995 | .set_cr3 = vmx_set_cr3, |
14996 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 14997 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
14998 | .get_idt = vmx_get_idt, |
14999 | .set_idt = vmx_set_idt, | |
15000 | .get_gdt = vmx_get_gdt, | |
15001 | .set_gdt = vmx_set_gdt, | |
73aaf249 JK |
15002 | .get_dr6 = vmx_get_dr6, |
15003 | .set_dr6 = vmx_set_dr6, | |
020df079 | 15004 | .set_dr7 = vmx_set_dr7, |
81908bf4 | 15005 | .sync_dirty_debug_regs = vmx_sync_dirty_debug_regs, |
5fdbf976 | 15006 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
15007 | .get_rflags = vmx_get_rflags, |
15008 | .set_rflags = vmx_set_rflags, | |
be94f6b7 | 15009 | |
6aa8b732 | 15010 | .tlb_flush = vmx_flush_tlb, |
faff8758 | 15011 | .tlb_flush_gva = vmx_flush_tlb_gva, |
6aa8b732 | 15012 | |
6aa8b732 | 15013 | .run = vmx_vcpu_run, |
6062d012 | 15014 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 15015 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
15016 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
15017 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 15018 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 15019 | .set_irq = vmx_inject_irq, |
95ba8273 | 15020 | .set_nmi = vmx_inject_nmi, |
298101da | 15021 | .queue_exception = vmx_queue_exception, |
b463a6f7 | 15022 | .cancel_injection = vmx_cancel_injection, |
78646121 | 15023 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 | 15024 | .nmi_allowed = vmx_nmi_allowed, |
3cfc3092 JK |
15025 | .get_nmi_mask = vmx_get_nmi_mask, |
15026 | .set_nmi_mask = vmx_set_nmi_mask, | |
95ba8273 GN |
15027 | .enable_nmi_window = enable_nmi_window, |
15028 | .enable_irq_window = enable_irq_window, | |
15029 | .update_cr8_intercept = update_cr8_intercept, | |
8d860bbe | 15030 | .set_virtual_apic_mode = vmx_set_virtual_apic_mode, |
38b99173 | 15031 | .set_apic_access_page_addr = vmx_set_apic_access_page_addr, |
d62caabb AS |
15032 | .get_enable_apicv = vmx_get_enable_apicv, |
15033 | .refresh_apicv_exec_ctrl = vmx_refresh_apicv_exec_ctrl, | |
c7c9c56c | 15034 | .load_eoi_exitmap = vmx_load_eoi_exitmap, |
967235d3 | 15035 | .apicv_post_state_restore = vmx_apicv_post_state_restore, |
c7c9c56c YZ |
15036 | .hwapic_irr_update = vmx_hwapic_irr_update, |
15037 | .hwapic_isr_update = vmx_hwapic_isr_update, | |
e6c67d8c | 15038 | .guest_apic_has_interrupt = vmx_guest_apic_has_interrupt, |
a20ed54d YZ |
15039 | .sync_pir_to_irr = vmx_sync_pir_to_irr, |
15040 | .deliver_posted_interrupt = vmx_deliver_posted_interrupt, | |
95ba8273 | 15041 | |
cbc94022 | 15042 | .set_tss_addr = vmx_set_tss_addr, |
2ac52ab8 | 15043 | .set_identity_map_addr = vmx_set_identity_map_addr, |
67253af5 | 15044 | .get_tdp_level = get_ept_level, |
4b12f0de | 15045 | .get_mt_mask = vmx_get_mt_mask, |
229456fc | 15046 | |
586f9607 | 15047 | .get_exit_info = vmx_get_exit_info, |
586f9607 | 15048 | |
17cc3935 | 15049 | .get_lpage_level = vmx_get_lpage_level, |
0e851880 SY |
15050 | |
15051 | .cpuid_update = vmx_cpuid_update, | |
4e47c7a6 SY |
15052 | |
15053 | .rdtscp_supported = vmx_rdtscp_supported, | |
ad756a16 | 15054 | .invpcid_supported = vmx_invpcid_supported, |
d4330ef2 JR |
15055 | |
15056 | .set_supported_cpuid = vmx_set_supported_cpuid, | |
f5f48ee1 SY |
15057 | |
15058 | .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, | |
99e3e30a | 15059 | |
e79f245d | 15060 | .read_l1_tsc_offset = vmx_read_l1_tsc_offset, |
99e3e30a | 15061 | .write_tsc_offset = vmx_write_tsc_offset, |
1c97f0a0 JR |
15062 | |
15063 | .set_tdp_cr3 = vmx_set_cr3, | |
8a76d7f2 JR |
15064 | |
15065 | .check_intercept = vmx_check_intercept, | |
a547c6db | 15066 | .handle_external_intr = vmx_handle_external_intr, |
da8999d3 | 15067 | .mpx_supported = vmx_mpx_supported, |
55412b2e | 15068 | .xsaves_supported = vmx_xsaves_supported, |
66336cab | 15069 | .umip_emulated = vmx_umip_emulated, |
b6b8a145 JK |
15070 | |
15071 | .check_nested_events = vmx_check_nested_events, | |
d264ee0c | 15072 | .request_immediate_exit = vmx_request_immediate_exit, |
ae97a3b8 RK |
15073 | |
15074 | .sched_in = vmx_sched_in, | |
843e4330 KH |
15075 | |
15076 | .slot_enable_log_dirty = vmx_slot_enable_log_dirty, | |
15077 | .slot_disable_log_dirty = vmx_slot_disable_log_dirty, | |
15078 | .flush_log_dirty = vmx_flush_log_dirty, | |
15079 | .enable_log_dirty_pt_masked = vmx_enable_log_dirty_pt_masked, | |
c5f983f6 | 15080 | .write_log_dirty = vmx_write_pml_buffer, |
25462f7f | 15081 | |
bf9f6ac8 FW |
15082 | .pre_block = vmx_pre_block, |
15083 | .post_block = vmx_post_block, | |
15084 | ||
25462f7f | 15085 | .pmu_ops = &intel_pmu_ops, |
efc64404 FW |
15086 | |
15087 | .update_pi_irte = vmx_update_pi_irte, | |
64672c95 YJ |
15088 | |
15089 | #ifdef CONFIG_X86_64 | |
15090 | .set_hv_timer = vmx_set_hv_timer, | |
15091 | .cancel_hv_timer = vmx_cancel_hv_timer, | |
15092 | #endif | |
c45dcc71 AR |
15093 | |
15094 | .setup_mce = vmx_setup_mce, | |
0234bf88 | 15095 | |
8fcc4b59 JM |
15096 | .get_nested_state = vmx_get_nested_state, |
15097 | .set_nested_state = vmx_set_nested_state, | |
7f7f1ba3 PB |
15098 | .get_vmcs12_pages = nested_get_vmcs12_pages, |
15099 | ||
72d7b374 | 15100 | .smi_allowed = vmx_smi_allowed, |
0234bf88 LP |
15101 | .pre_enter_smm = vmx_pre_enter_smm, |
15102 | .pre_leave_smm = vmx_pre_leave_smm, | |
cc3d967f | 15103 | .enable_smi_window = enable_smi_window, |
57b119da VK |
15104 | |
15105 | .nested_enable_evmcs = nested_enable_evmcs, | |
6aa8b732 AK |
15106 | }; |
15107 | ||
72c6d2db | 15108 | static void vmx_cleanup_l1d_flush(void) |
a47dd5f0 PB |
15109 | { |
15110 | if (vmx_l1d_flush_pages) { | |
15111 | free_pages((unsigned long)vmx_l1d_flush_pages, L1D_CACHE_ORDER); | |
15112 | vmx_l1d_flush_pages = NULL; | |
15113 | } | |
72c6d2db TG |
15114 | /* Restore state so sysfs ignores VMX */ |
15115 | l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_AUTO; | |
a399477e KRW |
15116 | } |
15117 | ||
a7b9020b TG |
15118 | static void vmx_exit(void) |
15119 | { | |
15120 | #ifdef CONFIG_KEXEC_CORE | |
15121 | RCU_INIT_POINTER(crash_vmclear_loaded_vmcss, NULL); | |
15122 | synchronize_rcu(); | |
15123 | #endif | |
15124 | ||
15125 | kvm_exit(); | |
15126 | ||
15127 | #if IS_ENABLED(CONFIG_HYPERV) | |
15128 | if (static_branch_unlikely(&enable_evmcs)) { | |
15129 | int cpu; | |
15130 | struct hv_vp_assist_page *vp_ap; | |
15131 | /* | |
15132 | * Reset everything to support using non-enlightened VMCS | |
15133 | * access later (e.g. when we reload the module with | |
15134 | * enlightened_vmcs=0) | |
15135 | */ | |
15136 | for_each_online_cpu(cpu) { | |
15137 | vp_ap = hv_get_vp_assist_page(cpu); | |
15138 | ||
15139 | if (!vp_ap) | |
15140 | continue; | |
15141 | ||
15142 | vp_ap->current_nested_vmcs = 0; | |
15143 | vp_ap->enlighten_vmentry = 0; | |
15144 | } | |
15145 | ||
15146 | static_branch_disable(&enable_evmcs); | |
15147 | } | |
15148 | #endif | |
15149 | vmx_cleanup_l1d_flush(); | |
15150 | } | |
15151 | module_exit(vmx_exit); | |
15152 | ||
6aa8b732 AK |
15153 | static int __init vmx_init(void) |
15154 | { | |
773e8a04 VK |
15155 | int r; |
15156 | ||
15157 | #if IS_ENABLED(CONFIG_HYPERV) | |
15158 | /* | |
15159 | * Enlightened VMCS usage should be recommended and the host needs | |
15160 | * to support eVMCS v1 or above. We can also disable eVMCS support | |
15161 | * with module parameter. | |
15162 | */ | |
15163 | if (enlightened_vmcs && | |
15164 | ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED && | |
15165 | (ms_hyperv.nested_features & HV_X64_ENLIGHTENED_VMCS_VERSION) >= | |
15166 | KVM_EVMCS_VERSION) { | |
15167 | int cpu; | |
15168 | ||
15169 | /* Check that we have assist pages on all online CPUs */ | |
15170 | for_each_online_cpu(cpu) { | |
15171 | if (!hv_get_vp_assist_page(cpu)) { | |
15172 | enlightened_vmcs = false; | |
15173 | break; | |
15174 | } | |
15175 | } | |
15176 | ||
15177 | if (enlightened_vmcs) { | |
15178 | pr_info("KVM: vmx: using Hyper-V Enlightened VMCS\n"); | |
15179 | static_branch_enable(&enable_evmcs); | |
15180 | } | |
15181 | } else { | |
15182 | enlightened_vmcs = false; | |
15183 | } | |
15184 | #endif | |
15185 | ||
15186 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), | |
a7b9020b | 15187 | __alignof__(struct vcpu_vmx), THIS_MODULE); |
fdef3ad1 | 15188 | if (r) |
34a1cd60 | 15189 | return r; |
25c5f225 | 15190 | |
a7b9020b | 15191 | /* |
7db92e16 TG |
15192 | * Must be called after kvm_init() so enable_ept is properly set |
15193 | * up. Hand the parameter mitigation value in which was stored in | |
15194 | * the pre module init parser. If no parameter was given, it will | |
15195 | * contain 'auto' which will be turned into the default 'cond' | |
15196 | * mitigation mode. | |
15197 | */ | |
15198 | if (boot_cpu_has(X86_BUG_L1TF)) { | |
15199 | r = vmx_setup_l1d_flush(vmentry_l1d_flush_param); | |
15200 | if (r) { | |
15201 | vmx_exit(); | |
15202 | return r; | |
15203 | } | |
a47dd5f0 | 15204 | } |
25c5f225 | 15205 | |
2965faa5 | 15206 | #ifdef CONFIG_KEXEC_CORE |
8f536b76 ZY |
15207 | rcu_assign_pointer(crash_vmclear_loaded_vmcss, |
15208 | crash_vmclear_local_loaded_vmcss); | |
15209 | #endif | |
21ebf53b | 15210 | vmx_check_vmcs12_offsets(); |
8f536b76 | 15211 | |
fdef3ad1 | 15212 | return 0; |
6aa8b732 | 15213 | } |
a7b9020b | 15214 | module_init(vmx_init); |