Commit | Line | Data |
---|---|---|
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" |
e495606d | 21 | |
edf88417 | 22 | #include <linux/kvm_host.h> |
6aa8b732 | 23 | #include <linux/module.h> |
9d8f549d | 24 | #include <linux/kernel.h> |
6aa8b732 AK |
25 | #include <linux/mm.h> |
26 | #include <linux/highmem.h> | |
e8edc6e0 | 27 | #include <linux/sched.h> |
c7addb90 | 28 | #include <linux/moduleparam.h> |
229456fc | 29 | #include <linux/ftrace_event.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
cafd6659 | 31 | #include <linux/tboot.h> |
5fdbf976 | 32 | #include "kvm_cache_regs.h" |
35920a35 | 33 | #include "x86.h" |
e495606d | 34 | |
6aa8b732 | 35 | #include <asm/io.h> |
3b3be0d1 | 36 | #include <asm/desc.h> |
13673a90 | 37 | #include <asm/vmx.h> |
6210e37b | 38 | #include <asm/virtext.h> |
a0861c02 | 39 | #include <asm/mce.h> |
2acf923e DC |
40 | #include <asm/i387.h> |
41 | #include <asm/xcr.h> | |
6aa8b732 | 42 | |
229456fc MT |
43 | #include "trace.h" |
44 | ||
4ecac3fd AK |
45 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
46 | ||
6aa8b732 AK |
47 | MODULE_AUTHOR("Qumranet"); |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
4462d21a | 50 | static int __read_mostly bypass_guest_pf = 1; |
c1f8bc04 | 51 | module_param(bypass_guest_pf, bool, S_IRUGO); |
c7addb90 | 52 | |
4462d21a | 53 | static int __read_mostly enable_vpid = 1; |
736caefe | 54 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 55 | |
4462d21a | 56 | static int __read_mostly flexpriority_enabled = 1; |
736caefe | 57 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 58 | |
4462d21a | 59 | static int __read_mostly enable_ept = 1; |
736caefe | 60 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 61 | |
3a624e29 NK |
62 | static int __read_mostly enable_unrestricted_guest = 1; |
63 | module_param_named(unrestricted_guest, | |
64 | enable_unrestricted_guest, bool, S_IRUGO); | |
65 | ||
4462d21a | 66 | static int __read_mostly emulate_invalid_guest_state = 0; |
c1f8bc04 | 67 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 68 | |
b923e62e DX |
69 | static int __read_mostly vmm_exclusive = 1; |
70 | module_param(vmm_exclusive, bool, S_IRUGO); | |
71 | ||
443381a8 AL |
72 | static int __read_mostly yield_on_hlt = 1; |
73 | module_param(yield_on_hlt, bool, S_IRUGO); | |
74 | ||
cdc0e244 AK |
75 | #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST \ |
76 | (X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD) | |
77 | #define KVM_GUEST_CR0_MASK \ | |
78 | (KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
79 | #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST \ | |
81231c69 | 80 | (X86_CR0_WP | X86_CR0_NE) |
cdc0e244 AK |
81 | #define KVM_VM_CR0_ALWAYS_ON \ |
82 | (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
4c38609a AK |
83 | #define KVM_CR4_GUEST_OWNED_BITS \ |
84 | (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
85 | | X86_CR4_OSXMMEXCPT) | |
86 | ||
cdc0e244 AK |
87 | #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) |
88 | #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) | |
89 | ||
78ac8b47 AK |
90 | #define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM)) |
91 | ||
4b8d54f9 ZE |
92 | /* |
93 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
94 | * ple_gap: upper bound on the amount of time between two successive | |
95 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
00c25bce | 96 | * According to test, this time is usually smaller than 128 cycles. |
4b8d54f9 ZE |
97 | * ple_window: upper bound on the amount of time a guest is allowed to execute |
98 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
99 | * less than 2^12 cycles | |
100 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
101 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
102 | */ | |
00c25bce | 103 | #define KVM_VMX_DEFAULT_PLE_GAP 128 |
4b8d54f9 ZE |
104 | #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 |
105 | static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; | |
106 | module_param(ple_gap, int, S_IRUGO); | |
107 | ||
108 | static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; | |
109 | module_param(ple_window, int, S_IRUGO); | |
110 | ||
61d2ef2c AK |
111 | #define NR_AUTOLOAD_MSRS 1 |
112 | ||
a2fa3e9f GH |
113 | struct vmcs { |
114 | u32 revision_id; | |
115 | u32 abort; | |
116 | char data[0]; | |
117 | }; | |
118 | ||
26bb0981 AK |
119 | struct shared_msr_entry { |
120 | unsigned index; | |
121 | u64 data; | |
d5696725 | 122 | u64 mask; |
26bb0981 AK |
123 | }; |
124 | ||
a2fa3e9f | 125 | struct vcpu_vmx { |
fb3f0f51 | 126 | struct kvm_vcpu vcpu; |
543e4243 | 127 | struct list_head local_vcpus_link; |
313dbd49 | 128 | unsigned long host_rsp; |
a2fa3e9f | 129 | int launched; |
29bd8a78 | 130 | u8 fail; |
51aa01d1 | 131 | u32 exit_intr_info; |
1155f76a | 132 | u32 idt_vectoring_info; |
6de12732 | 133 | ulong rflags; |
26bb0981 | 134 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
135 | int nmsrs; |
136 | int save_nmsrs; | |
a2fa3e9f | 137 | #ifdef CONFIG_X86_64 |
44ea2b17 AK |
138 | u64 msr_host_kernel_gs_base; |
139 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f GH |
140 | #endif |
141 | struct vmcs *vmcs; | |
61d2ef2c AK |
142 | struct msr_autoload { |
143 | unsigned nr; | |
144 | struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS]; | |
145 | struct vmx_msr_entry host[NR_AUTOLOAD_MSRS]; | |
146 | } msr_autoload; | |
a2fa3e9f GH |
147 | struct { |
148 | int loaded; | |
149 | u16 fs_sel, gs_sel, ldt_sel; | |
152d3f2f LV |
150 | int gs_ldt_reload_needed; |
151 | int fs_reload_needed; | |
d77c26fc | 152 | } host_state; |
9c8cba37 | 153 | struct { |
7ffd92c5 | 154 | int vm86_active; |
78ac8b47 | 155 | ulong save_rflags; |
7ffd92c5 AK |
156 | struct kvm_save_segment { |
157 | u16 selector; | |
158 | unsigned long base; | |
159 | u32 limit; | |
160 | u32 ar; | |
161 | } tr, es, ds, fs, gs; | |
9c8cba37 | 162 | } rmode; |
2384d2b3 | 163 | int vpid; |
04fa4d32 | 164 | bool emulation_required; |
3b86cd99 JK |
165 | |
166 | /* Support for vnmi-less CPUs */ | |
167 | int soft_vnmi_blocked; | |
168 | ktime_t entry_time; | |
169 | s64 vnmi_blocked_time; | |
a0861c02 | 170 | u32 exit_reason; |
4e47c7a6 SY |
171 | |
172 | bool rdtscp_enabled; | |
a2fa3e9f GH |
173 | }; |
174 | ||
175 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) | |
176 | { | |
fb3f0f51 | 177 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
178 | } |
179 | ||
4e1096d2 | 180 | static u64 construct_eptp(unsigned long root_hpa); |
4610c9cc DX |
181 | static void kvm_cpu_vmxon(u64 addr); |
182 | static void kvm_cpu_vmxoff(void); | |
aff48baa | 183 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); |
776e58ea | 184 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr); |
75880a01 | 185 | |
6aa8b732 AK |
186 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
187 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
543e4243 | 188 | static DEFINE_PER_CPU(struct list_head, vcpus_on_cpu); |
3444d7da | 189 | static DEFINE_PER_CPU(struct desc_ptr, host_gdt); |
6aa8b732 | 190 | |
3e7c73e9 AK |
191 | static unsigned long *vmx_io_bitmap_a; |
192 | static unsigned long *vmx_io_bitmap_b; | |
5897297b AK |
193 | static unsigned long *vmx_msr_bitmap_legacy; |
194 | static unsigned long *vmx_msr_bitmap_longmode; | |
fdef3ad1 | 195 | |
110312c8 AK |
196 | static bool cpu_has_load_ia32_efer; |
197 | ||
2384d2b3 SY |
198 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
199 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
200 | ||
1c3d14fe | 201 | static struct vmcs_config { |
6aa8b732 AK |
202 | int size; |
203 | int order; | |
204 | u32 revision_id; | |
1c3d14fe YS |
205 | u32 pin_based_exec_ctrl; |
206 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 207 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
208 | u32 vmexit_ctrl; |
209 | u32 vmentry_ctrl; | |
210 | } vmcs_config; | |
6aa8b732 | 211 | |
efff9e53 | 212 | static struct vmx_capability { |
d56f546d SY |
213 | u32 ept; |
214 | u32 vpid; | |
215 | } vmx_capability; | |
216 | ||
6aa8b732 AK |
217 | #define VMX_SEGMENT_FIELD(seg) \ |
218 | [VCPU_SREG_##seg] = { \ | |
219 | .selector = GUEST_##seg##_SELECTOR, \ | |
220 | .base = GUEST_##seg##_BASE, \ | |
221 | .limit = GUEST_##seg##_LIMIT, \ | |
222 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
223 | } | |
224 | ||
225 | static struct kvm_vmx_segment_field { | |
226 | unsigned selector; | |
227 | unsigned base; | |
228 | unsigned limit; | |
229 | unsigned ar_bytes; | |
230 | } kvm_vmx_segment_fields[] = { | |
231 | VMX_SEGMENT_FIELD(CS), | |
232 | VMX_SEGMENT_FIELD(DS), | |
233 | VMX_SEGMENT_FIELD(ES), | |
234 | VMX_SEGMENT_FIELD(FS), | |
235 | VMX_SEGMENT_FIELD(GS), | |
236 | VMX_SEGMENT_FIELD(SS), | |
237 | VMX_SEGMENT_FIELD(TR), | |
238 | VMX_SEGMENT_FIELD(LDTR), | |
239 | }; | |
240 | ||
26bb0981 AK |
241 | static u64 host_efer; |
242 | ||
6de4f3ad AK |
243 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
244 | ||
4d56c8a7 | 245 | /* |
8c06585d | 246 | * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it |
4d56c8a7 AK |
247 | * away by decrementing the array size. |
248 | */ | |
6aa8b732 | 249 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 250 | #ifdef CONFIG_X86_64 |
44ea2b17 | 251 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 | 252 | #endif |
8c06585d | 253 | MSR_EFER, MSR_TSC_AUX, MSR_STAR, |
6aa8b732 | 254 | }; |
9d8f549d | 255 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 256 | |
31299944 | 257 | static inline bool is_page_fault(u32 intr_info) |
6aa8b732 AK |
258 | { |
259 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
260 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 261 | (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
6aa8b732 AK |
262 | } |
263 | ||
31299944 | 264 | static inline bool is_no_device(u32 intr_info) |
2ab455cc AL |
265 | { |
266 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
267 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 268 | (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
2ab455cc AL |
269 | } |
270 | ||
31299944 | 271 | static inline bool is_invalid_opcode(u32 intr_info) |
7aa81cc0 AL |
272 | { |
273 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
274 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 275 | (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
7aa81cc0 AL |
276 | } |
277 | ||
31299944 | 278 | static inline bool is_external_interrupt(u32 intr_info) |
6aa8b732 AK |
279 | { |
280 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
281 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
282 | } | |
283 | ||
31299944 | 284 | static inline bool is_machine_check(u32 intr_info) |
a0861c02 AK |
285 | { |
286 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
287 | INTR_INFO_VALID_MASK)) == | |
288 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
289 | } | |
290 | ||
31299944 | 291 | static inline bool cpu_has_vmx_msr_bitmap(void) |
25c5f225 | 292 | { |
04547156 | 293 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
294 | } |
295 | ||
31299944 | 296 | static inline bool cpu_has_vmx_tpr_shadow(void) |
6e5d865c | 297 | { |
04547156 | 298 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
299 | } |
300 | ||
31299944 | 301 | static inline bool vm_need_tpr_shadow(struct kvm *kvm) |
6e5d865c | 302 | { |
04547156 | 303 | return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)); |
6e5d865c YS |
304 | } |
305 | ||
31299944 | 306 | static inline bool cpu_has_secondary_exec_ctrls(void) |
f78e0e2e | 307 | { |
04547156 SY |
308 | return vmcs_config.cpu_based_exec_ctrl & |
309 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
310 | } |
311 | ||
774ead3a | 312 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 313 | { |
04547156 SY |
314 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
315 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
316 | } | |
317 | ||
318 | static inline bool cpu_has_vmx_flexpriority(void) | |
319 | { | |
320 | return cpu_has_vmx_tpr_shadow() && | |
321 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
322 | } |
323 | ||
e799794e MT |
324 | static inline bool cpu_has_vmx_ept_execute_only(void) |
325 | { | |
31299944 | 326 | return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; |
e799794e MT |
327 | } |
328 | ||
329 | static inline bool cpu_has_vmx_eptp_uncacheable(void) | |
330 | { | |
31299944 | 331 | return vmx_capability.ept & VMX_EPTP_UC_BIT; |
e799794e MT |
332 | } |
333 | ||
334 | static inline bool cpu_has_vmx_eptp_writeback(void) | |
335 | { | |
31299944 | 336 | return vmx_capability.ept & VMX_EPTP_WB_BIT; |
e799794e MT |
337 | } |
338 | ||
339 | static inline bool cpu_has_vmx_ept_2m_page(void) | |
340 | { | |
31299944 | 341 | return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; |
e799794e MT |
342 | } |
343 | ||
878403b7 SY |
344 | static inline bool cpu_has_vmx_ept_1g_page(void) |
345 | { | |
31299944 | 346 | return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; |
878403b7 SY |
347 | } |
348 | ||
4bc9b982 SY |
349 | static inline bool cpu_has_vmx_ept_4levels(void) |
350 | { | |
351 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; | |
352 | } | |
353 | ||
31299944 | 354 | static inline bool cpu_has_vmx_invept_individual_addr(void) |
d56f546d | 355 | { |
31299944 | 356 | return vmx_capability.ept & VMX_EPT_EXTENT_INDIVIDUAL_BIT; |
d56f546d SY |
357 | } |
358 | ||
31299944 | 359 | static inline bool cpu_has_vmx_invept_context(void) |
d56f546d | 360 | { |
31299944 | 361 | return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; |
d56f546d SY |
362 | } |
363 | ||
31299944 | 364 | static inline bool cpu_has_vmx_invept_global(void) |
d56f546d | 365 | { |
31299944 | 366 | return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; |
d56f546d SY |
367 | } |
368 | ||
518c8aee GJ |
369 | static inline bool cpu_has_vmx_invvpid_single(void) |
370 | { | |
371 | return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; | |
372 | } | |
373 | ||
b9d762fa GJ |
374 | static inline bool cpu_has_vmx_invvpid_global(void) |
375 | { | |
376 | return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
377 | } | |
378 | ||
31299944 | 379 | static inline bool cpu_has_vmx_ept(void) |
d56f546d | 380 | { |
04547156 SY |
381 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
382 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
383 | } |
384 | ||
31299944 | 385 | static inline bool cpu_has_vmx_unrestricted_guest(void) |
3a624e29 NK |
386 | { |
387 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
388 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
389 | } | |
390 | ||
31299944 | 391 | static inline bool cpu_has_vmx_ple(void) |
4b8d54f9 ZE |
392 | { |
393 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
394 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
395 | } | |
396 | ||
31299944 | 397 | static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm) |
f78e0e2e | 398 | { |
6d3e435e | 399 | return flexpriority_enabled && irqchip_in_kernel(kvm); |
f78e0e2e SY |
400 | } |
401 | ||
31299944 | 402 | static inline bool cpu_has_vmx_vpid(void) |
2384d2b3 | 403 | { |
04547156 SY |
404 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
405 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
406 | } |
407 | ||
31299944 | 408 | static inline bool cpu_has_vmx_rdtscp(void) |
4e47c7a6 SY |
409 | { |
410 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
411 | SECONDARY_EXEC_RDTSCP; | |
412 | } | |
413 | ||
31299944 | 414 | static inline bool cpu_has_virtual_nmis(void) |
f08864b4 SY |
415 | { |
416 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
417 | } | |
418 | ||
f5f48ee1 SY |
419 | static inline bool cpu_has_vmx_wbinvd_exit(void) |
420 | { | |
421 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
422 | SECONDARY_EXEC_WBINVD_EXITING; | |
423 | } | |
424 | ||
04547156 SY |
425 | static inline bool report_flexpriority(void) |
426 | { | |
427 | return flexpriority_enabled; | |
428 | } | |
429 | ||
8b9cf98c | 430 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
431 | { |
432 | int i; | |
433 | ||
a2fa3e9f | 434 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 435 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
436 | return i; |
437 | return -1; | |
438 | } | |
439 | ||
2384d2b3 SY |
440 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
441 | { | |
442 | struct { | |
443 | u64 vpid : 16; | |
444 | u64 rsvd : 48; | |
445 | u64 gva; | |
446 | } operand = { vpid, 0, gva }; | |
447 | ||
4ecac3fd | 448 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
449 | /* CF==1 or ZF==1 --> rc = -1 */ |
450 | "; ja 1f ; ud2 ; 1:" | |
451 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
452 | } | |
453 | ||
1439442c SY |
454 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
455 | { | |
456 | struct { | |
457 | u64 eptp, gpa; | |
458 | } operand = {eptp, gpa}; | |
459 | ||
4ecac3fd | 460 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
461 | /* CF==1 or ZF==1 --> rc = -1 */ |
462 | "; ja 1f ; ud2 ; 1:\n" | |
463 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
464 | } | |
465 | ||
26bb0981 | 466 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
467 | { |
468 | int i; | |
469 | ||
8b9cf98c | 470 | i = __find_msr_index(vmx, msr); |
a75beee6 | 471 | if (i >= 0) |
a2fa3e9f | 472 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 473 | return NULL; |
7725f0ba AK |
474 | } |
475 | ||
6aa8b732 AK |
476 | static void vmcs_clear(struct vmcs *vmcs) |
477 | { | |
478 | u64 phys_addr = __pa(vmcs); | |
479 | u8 error; | |
480 | ||
4ecac3fd | 481 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
16d8f72f | 482 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
6aa8b732 AK |
483 | : "cc", "memory"); |
484 | if (error) | |
485 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
486 | vmcs, phys_addr); | |
487 | } | |
488 | ||
7725b894 DX |
489 | static void vmcs_load(struct vmcs *vmcs) |
490 | { | |
491 | u64 phys_addr = __pa(vmcs); | |
492 | u8 error; | |
493 | ||
494 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" | |
16d8f72f | 495 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
7725b894 DX |
496 | : "cc", "memory"); |
497 | if (error) | |
498 | printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n", | |
499 | vmcs, phys_addr); | |
500 | } | |
501 | ||
6aa8b732 AK |
502 | static void __vcpu_clear(void *arg) |
503 | { | |
8b9cf98c | 504 | struct vcpu_vmx *vmx = arg; |
d3b2c338 | 505 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 506 | |
8b9cf98c | 507 | if (vmx->vcpu.cpu == cpu) |
a2fa3e9f GH |
508 | vmcs_clear(vmx->vmcs); |
509 | if (per_cpu(current_vmcs, cpu) == vmx->vmcs) | |
6aa8b732 | 510 | per_cpu(current_vmcs, cpu) = NULL; |
543e4243 AK |
511 | list_del(&vmx->local_vcpus_link); |
512 | vmx->vcpu.cpu = -1; | |
513 | vmx->launched = 0; | |
6aa8b732 AK |
514 | } |
515 | ||
8b9cf98c | 516 | static void vcpu_clear(struct vcpu_vmx *vmx) |
8d0be2b3 | 517 | { |
eae5ecb5 AK |
518 | if (vmx->vcpu.cpu == -1) |
519 | return; | |
8691e5a8 | 520 | smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 1); |
8d0be2b3 AK |
521 | } |
522 | ||
1760dd49 | 523 | static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx) |
2384d2b3 SY |
524 | { |
525 | if (vmx->vpid == 0) | |
526 | return; | |
527 | ||
518c8aee GJ |
528 | if (cpu_has_vmx_invvpid_single()) |
529 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
2384d2b3 SY |
530 | } |
531 | ||
b9d762fa GJ |
532 | static inline void vpid_sync_vcpu_global(void) |
533 | { | |
534 | if (cpu_has_vmx_invvpid_global()) | |
535 | __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0); | |
536 | } | |
537 | ||
538 | static inline void vpid_sync_context(struct vcpu_vmx *vmx) | |
539 | { | |
540 | if (cpu_has_vmx_invvpid_single()) | |
1760dd49 | 541 | vpid_sync_vcpu_single(vmx); |
b9d762fa GJ |
542 | else |
543 | vpid_sync_vcpu_global(); | |
544 | } | |
545 | ||
1439442c SY |
546 | static inline void ept_sync_global(void) |
547 | { | |
548 | if (cpu_has_vmx_invept_global()) | |
549 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
550 | } | |
551 | ||
552 | static inline void ept_sync_context(u64 eptp) | |
553 | { | |
089d034e | 554 | if (enable_ept) { |
1439442c SY |
555 | if (cpu_has_vmx_invept_context()) |
556 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
557 | else | |
558 | ept_sync_global(); | |
559 | } | |
560 | } | |
561 | ||
562 | static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa) | |
563 | { | |
089d034e | 564 | if (enable_ept) { |
1439442c SY |
565 | if (cpu_has_vmx_invept_individual_addr()) |
566 | __invept(VMX_EPT_EXTENT_INDIVIDUAL_ADDR, | |
567 | eptp, gpa); | |
568 | else | |
569 | ept_sync_context(eptp); | |
570 | } | |
571 | } | |
572 | ||
6aa8b732 AK |
573 | static unsigned long vmcs_readl(unsigned long field) |
574 | { | |
a295673a | 575 | unsigned long value = 0; |
6aa8b732 | 576 | |
4ecac3fd | 577 | asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX) |
a295673a | 578 | : "+a"(value) : "d"(field) : "cc"); |
6aa8b732 AK |
579 | return value; |
580 | } | |
581 | ||
582 | static u16 vmcs_read16(unsigned long field) | |
583 | { | |
584 | return vmcs_readl(field); | |
585 | } | |
586 | ||
587 | static u32 vmcs_read32(unsigned long field) | |
588 | { | |
589 | return vmcs_readl(field); | |
590 | } | |
591 | ||
592 | static u64 vmcs_read64(unsigned long field) | |
593 | { | |
05b3e0c2 | 594 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
595 | return vmcs_readl(field); |
596 | #else | |
597 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
598 | #endif | |
599 | } | |
600 | ||
e52de1b8 AK |
601 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
602 | { | |
603 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
604 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
605 | dump_stack(); | |
606 | } | |
607 | ||
6aa8b732 AK |
608 | static void vmcs_writel(unsigned long field, unsigned long value) |
609 | { | |
610 | u8 error; | |
611 | ||
4ecac3fd | 612 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 613 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
614 | if (unlikely(error)) |
615 | vmwrite_error(field, value); | |
6aa8b732 AK |
616 | } |
617 | ||
618 | static void vmcs_write16(unsigned long field, u16 value) | |
619 | { | |
620 | vmcs_writel(field, value); | |
621 | } | |
622 | ||
623 | static void vmcs_write32(unsigned long field, u32 value) | |
624 | { | |
625 | vmcs_writel(field, value); | |
626 | } | |
627 | ||
628 | static void vmcs_write64(unsigned long field, u64 value) | |
629 | { | |
6aa8b732 | 630 | vmcs_writel(field, value); |
7682f2d0 | 631 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
632 | asm volatile (""); |
633 | vmcs_writel(field+1, value >> 32); | |
634 | #endif | |
635 | } | |
636 | ||
2ab455cc AL |
637 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
638 | { | |
639 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
640 | } | |
641 | ||
642 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
643 | { | |
644 | vmcs_writel(field, vmcs_readl(field) | mask); | |
645 | } | |
646 | ||
abd3f2d6 AK |
647 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
648 | { | |
649 | u32 eb; | |
650 | ||
fd7373cc JK |
651 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) | |
652 | (1u << NM_VECTOR) | (1u << DB_VECTOR); | |
653 | if ((vcpu->guest_debug & | |
654 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) == | |
655 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) | |
656 | eb |= 1u << BP_VECTOR; | |
7ffd92c5 | 657 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 658 | eb = ~0; |
089d034e | 659 | if (enable_ept) |
1439442c | 660 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
02daab21 AK |
661 | if (vcpu->fpu_active) |
662 | eb &= ~(1u << NM_VECTOR); | |
abd3f2d6 AK |
663 | vmcs_write32(EXCEPTION_BITMAP, eb); |
664 | } | |
665 | ||
61d2ef2c AK |
666 | static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr) |
667 | { | |
668 | unsigned i; | |
669 | struct msr_autoload *m = &vmx->msr_autoload; | |
670 | ||
110312c8 AK |
671 | if (msr == MSR_EFER && cpu_has_load_ia32_efer) { |
672 | vmcs_clear_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER); | |
673 | vmcs_clear_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER); | |
674 | return; | |
675 | } | |
676 | ||
61d2ef2c AK |
677 | for (i = 0; i < m->nr; ++i) |
678 | if (m->guest[i].index == msr) | |
679 | break; | |
680 | ||
681 | if (i == m->nr) | |
682 | return; | |
683 | --m->nr; | |
684 | m->guest[i] = m->guest[m->nr]; | |
685 | m->host[i] = m->host[m->nr]; | |
686 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
687 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
688 | } | |
689 | ||
690 | static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, | |
691 | u64 guest_val, u64 host_val) | |
692 | { | |
693 | unsigned i; | |
694 | struct msr_autoload *m = &vmx->msr_autoload; | |
695 | ||
110312c8 AK |
696 | if (msr == MSR_EFER && cpu_has_load_ia32_efer) { |
697 | vmcs_write64(GUEST_IA32_EFER, guest_val); | |
698 | vmcs_write64(HOST_IA32_EFER, host_val); | |
699 | vmcs_set_bits(VM_ENTRY_CONTROLS, VM_ENTRY_LOAD_IA32_EFER); | |
700 | vmcs_set_bits(VM_EXIT_CONTROLS, VM_EXIT_LOAD_IA32_EFER); | |
701 | return; | |
702 | } | |
703 | ||
61d2ef2c AK |
704 | for (i = 0; i < m->nr; ++i) |
705 | if (m->guest[i].index == msr) | |
706 | break; | |
707 | ||
708 | if (i == m->nr) { | |
709 | ++m->nr; | |
710 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
711 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
712 | } | |
713 | ||
714 | m->guest[i].index = msr; | |
715 | m->guest[i].value = guest_val; | |
716 | m->host[i].index = msr; | |
717 | m->host[i].value = host_val; | |
718 | } | |
719 | ||
33ed6329 AK |
720 | static void reload_tss(void) |
721 | { | |
33ed6329 AK |
722 | /* |
723 | * VT restores TR but not its size. Useless. | |
724 | */ | |
d359192f | 725 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
a5f61300 | 726 | struct desc_struct *descs; |
33ed6329 | 727 | |
d359192f | 728 | descs = (void *)gdt->address; |
33ed6329 AK |
729 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
730 | load_TR_desc(); | |
33ed6329 AK |
731 | } |
732 | ||
92c0d900 | 733 | static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) |
2cc51560 | 734 | { |
3a34a881 | 735 | u64 guest_efer; |
51c6cf66 AK |
736 | u64 ignore_bits; |
737 | ||
f6801dff | 738 | guest_efer = vmx->vcpu.arch.efer; |
3a34a881 | 739 | |
51c6cf66 AK |
740 | /* |
741 | * NX is emulated; LMA and LME handled by hardware; SCE meaninless | |
742 | * outside long mode | |
743 | */ | |
744 | ignore_bits = EFER_NX | EFER_SCE; | |
745 | #ifdef CONFIG_X86_64 | |
746 | ignore_bits |= EFER_LMA | EFER_LME; | |
747 | /* SCE is meaningful only in long mode on Intel */ | |
748 | if (guest_efer & EFER_LMA) | |
749 | ignore_bits &= ~(u64)EFER_SCE; | |
750 | #endif | |
51c6cf66 AK |
751 | guest_efer &= ~ignore_bits; |
752 | guest_efer |= host_efer & ignore_bits; | |
26bb0981 | 753 | vmx->guest_msrs[efer_offset].data = guest_efer; |
d5696725 | 754 | vmx->guest_msrs[efer_offset].mask = ~ignore_bits; |
84ad33ef AK |
755 | |
756 | clear_atomic_switch_msr(vmx, MSR_EFER); | |
757 | /* On ept, can't emulate nx, and must switch nx atomically */ | |
758 | if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) { | |
759 | guest_efer = vmx->vcpu.arch.efer; | |
760 | if (!(guest_efer & EFER_LMA)) | |
761 | guest_efer &= ~EFER_LME; | |
762 | add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer); | |
763 | return false; | |
764 | } | |
765 | ||
26bb0981 | 766 | return true; |
51c6cf66 AK |
767 | } |
768 | ||
2d49ec72 GN |
769 | static unsigned long segment_base(u16 selector) |
770 | { | |
d359192f | 771 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
2d49ec72 GN |
772 | struct desc_struct *d; |
773 | unsigned long table_base; | |
774 | unsigned long v; | |
775 | ||
776 | if (!(selector & ~3)) | |
777 | return 0; | |
778 | ||
d359192f | 779 | table_base = gdt->address; |
2d49ec72 GN |
780 | |
781 | if (selector & 4) { /* from ldt */ | |
782 | u16 ldt_selector = kvm_read_ldt(); | |
783 | ||
784 | if (!(ldt_selector & ~3)) | |
785 | return 0; | |
786 | ||
787 | table_base = segment_base(ldt_selector); | |
788 | } | |
789 | d = (struct desc_struct *)(table_base + (selector & ~7)); | |
790 | v = get_desc_base(d); | |
791 | #ifdef CONFIG_X86_64 | |
792 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) | |
793 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
794 | #endif | |
795 | return v; | |
796 | } | |
797 | ||
798 | static inline unsigned long kvm_read_tr_base(void) | |
799 | { | |
800 | u16 tr; | |
801 | asm("str %0" : "=g"(tr)); | |
802 | return segment_base(tr); | |
803 | } | |
804 | ||
04d2cc77 | 805 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 806 | { |
04d2cc77 | 807 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 808 | int i; |
04d2cc77 | 809 | |
a2fa3e9f | 810 | if (vmx->host_state.loaded) |
33ed6329 AK |
811 | return; |
812 | ||
a2fa3e9f | 813 | vmx->host_state.loaded = 1; |
33ed6329 AK |
814 | /* |
815 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
816 | * allow segment selectors with cpl > 0 or ti == 1. | |
817 | */ | |
d6e88aec | 818 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
152d3f2f | 819 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
9581d442 | 820 | savesegment(fs, vmx->host_state.fs_sel); |
152d3f2f | 821 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 822 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
823 | vmx->host_state.fs_reload_needed = 0; |
824 | } else { | |
33ed6329 | 825 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 826 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 827 | } |
9581d442 | 828 | savesegment(gs, vmx->host_state.gs_sel); |
a2fa3e9f GH |
829 | if (!(vmx->host_state.gs_sel & 7)) |
830 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
831 | else { |
832 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 833 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
834 | } |
835 | ||
836 | #ifdef CONFIG_X86_64 | |
837 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
838 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
839 | #else | |
a2fa3e9f GH |
840 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
841 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 842 | #endif |
707c0874 AK |
843 | |
844 | #ifdef CONFIG_X86_64 | |
c8770e7b AK |
845 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
846 | if (is_long_mode(&vmx->vcpu)) | |
44ea2b17 | 847 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
707c0874 | 848 | #endif |
26bb0981 AK |
849 | for (i = 0; i < vmx->save_nmsrs; ++i) |
850 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
d5696725 AK |
851 | vmx->guest_msrs[i].data, |
852 | vmx->guest_msrs[i].mask); | |
33ed6329 AK |
853 | } |
854 | ||
a9b21b62 | 855 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 856 | { |
a2fa3e9f | 857 | if (!vmx->host_state.loaded) |
33ed6329 AK |
858 | return; |
859 | ||
e1beb1d3 | 860 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 861 | vmx->host_state.loaded = 0; |
c8770e7b AK |
862 | #ifdef CONFIG_X86_64 |
863 | if (is_long_mode(&vmx->vcpu)) | |
864 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
865 | #endif | |
152d3f2f | 866 | if (vmx->host_state.gs_ldt_reload_needed) { |
d6e88aec | 867 | kvm_load_ldt(vmx->host_state.ldt_sel); |
33ed6329 | 868 | #ifdef CONFIG_X86_64 |
9581d442 | 869 | load_gs_index(vmx->host_state.gs_sel); |
9581d442 AK |
870 | #else |
871 | loadsegment(gs, vmx->host_state.gs_sel); | |
33ed6329 | 872 | #endif |
33ed6329 | 873 | } |
0a77fe4c AK |
874 | if (vmx->host_state.fs_reload_needed) |
875 | loadsegment(fs, vmx->host_state.fs_sel); | |
152d3f2f | 876 | reload_tss(); |
44ea2b17 | 877 | #ifdef CONFIG_X86_64 |
c8770e7b | 878 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
44ea2b17 | 879 | #endif |
1c11e713 AK |
880 | if (current_thread_info()->status & TS_USEDFPU) |
881 | clts(); | |
3444d7da | 882 | load_gdt(&__get_cpu_var(host_gdt)); |
33ed6329 AK |
883 | } |
884 | ||
a9b21b62 AK |
885 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
886 | { | |
887 | preempt_disable(); | |
888 | __vmx_load_host_state(vmx); | |
889 | preempt_enable(); | |
890 | } | |
891 | ||
6aa8b732 AK |
892 | /* |
893 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
894 | * vcpu mutex is already taken. | |
895 | */ | |
15ad7146 | 896 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 897 | { |
a2fa3e9f | 898 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4610c9cc | 899 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
6aa8b732 | 900 | |
4610c9cc DX |
901 | if (!vmm_exclusive) |
902 | kvm_cpu_vmxon(phys_addr); | |
903 | else if (vcpu->cpu != cpu) | |
8b9cf98c | 904 | vcpu_clear(vmx); |
6aa8b732 | 905 | |
a2fa3e9f | 906 | if (per_cpu(current_vmcs, cpu) != vmx->vmcs) { |
a2fa3e9f | 907 | per_cpu(current_vmcs, cpu) = vmx->vmcs; |
7725b894 | 908 | vmcs_load(vmx->vmcs); |
6aa8b732 AK |
909 | } |
910 | ||
911 | if (vcpu->cpu != cpu) { | |
d359192f | 912 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
6aa8b732 AK |
913 | unsigned long sysenter_esp; |
914 | ||
a8eeb04a | 915 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
92fe13be DX |
916 | local_irq_disable(); |
917 | list_add(&vmx->local_vcpus_link, | |
918 | &per_cpu(vcpus_on_cpu, cpu)); | |
919 | local_irq_enable(); | |
920 | ||
6aa8b732 AK |
921 | /* |
922 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
923 | * processors. | |
924 | */ | |
d6e88aec | 925 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
d359192f | 926 | vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */ |
6aa8b732 AK |
927 | |
928 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
929 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
930 | } | |
6aa8b732 AK |
931 | } |
932 | ||
933 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
934 | { | |
a9b21b62 | 935 | __vmx_load_host_state(to_vmx(vcpu)); |
4610c9cc | 936 | if (!vmm_exclusive) { |
b923e62e | 937 | __vcpu_clear(to_vmx(vcpu)); |
4610c9cc DX |
938 | kvm_cpu_vmxoff(); |
939 | } | |
6aa8b732 AK |
940 | } |
941 | ||
5fd86fcf AK |
942 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
943 | { | |
81231c69 AK |
944 | ulong cr0; |
945 | ||
5fd86fcf AK |
946 | if (vcpu->fpu_active) |
947 | return; | |
948 | vcpu->fpu_active = 1; | |
81231c69 AK |
949 | cr0 = vmcs_readl(GUEST_CR0); |
950 | cr0 &= ~(X86_CR0_TS | X86_CR0_MP); | |
951 | cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP); | |
952 | vmcs_writel(GUEST_CR0, cr0); | |
5fd86fcf | 953 | update_exception_bitmap(vcpu); |
edcafe3c AK |
954 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; |
955 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
5fd86fcf AK |
956 | } |
957 | ||
edcafe3c AK |
958 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu); |
959 | ||
5fd86fcf AK |
960 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
961 | { | |
edcafe3c | 962 | vmx_decache_cr0_guest_bits(vcpu); |
81231c69 | 963 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP); |
5fd86fcf | 964 | update_exception_bitmap(vcpu); |
edcafe3c AK |
965 | vcpu->arch.cr0_guest_owned_bits = 0; |
966 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
967 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf AK |
968 | } |
969 | ||
6aa8b732 AK |
970 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
971 | { | |
78ac8b47 | 972 | unsigned long rflags, save_rflags; |
345dcaa8 | 973 | |
6de12732 AK |
974 | if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) { |
975 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); | |
976 | rflags = vmcs_readl(GUEST_RFLAGS); | |
977 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
978 | rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS; | |
979 | save_rflags = to_vmx(vcpu)->rmode.save_rflags; | |
980 | rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
981 | } | |
982 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 | 983 | } |
6de12732 | 984 | return to_vmx(vcpu)->rflags; |
6aa8b732 AK |
985 | } |
986 | ||
987 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
988 | { | |
6de12732 AK |
989 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); |
990 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 AK |
991 | if (to_vmx(vcpu)->rmode.vm86_active) { |
992 | to_vmx(vcpu)->rmode.save_rflags = rflags; | |
053de044 | 993 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
78ac8b47 | 994 | } |
6aa8b732 AK |
995 | vmcs_writel(GUEST_RFLAGS, rflags); |
996 | } | |
997 | ||
2809f5d2 GC |
998 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
999 | { | |
1000 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
1001 | int ret = 0; | |
1002 | ||
1003 | if (interruptibility & GUEST_INTR_STATE_STI) | |
48005f64 | 1004 | ret |= KVM_X86_SHADOW_INT_STI; |
2809f5d2 | 1005 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) |
48005f64 | 1006 | ret |= KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 GC |
1007 | |
1008 | return ret & mask; | |
1009 | } | |
1010 | ||
1011 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
1012 | { | |
1013 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
1014 | u32 interruptibility = interruptibility_old; | |
1015 | ||
1016 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
1017 | ||
48005f64 | 1018 | if (mask & KVM_X86_SHADOW_INT_MOV_SS) |
2809f5d2 | 1019 | interruptibility |= GUEST_INTR_STATE_MOV_SS; |
48005f64 | 1020 | else if (mask & KVM_X86_SHADOW_INT_STI) |
2809f5d2 GC |
1021 | interruptibility |= GUEST_INTR_STATE_STI; |
1022 | ||
1023 | if ((interruptibility != interruptibility_old)) | |
1024 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
1025 | } | |
1026 | ||
6aa8b732 AK |
1027 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
1028 | { | |
1029 | unsigned long rip; | |
6aa8b732 | 1030 | |
5fdbf976 | 1031 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 1032 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 1033 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 1034 | |
2809f5d2 GC |
1035 | /* skipping an emulated instruction also counts */ |
1036 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
1037 | } |
1038 | ||
443381a8 AL |
1039 | static void vmx_clear_hlt(struct kvm_vcpu *vcpu) |
1040 | { | |
1041 | /* Ensure that we clear the HLT state in the VMCS. We don't need to | |
1042 | * explicitly skip the instruction because if the HLT state is set, then | |
1043 | * the instruction is already executing and RIP has already been | |
1044 | * advanced. */ | |
1045 | if (!yield_on_hlt && | |
1046 | vmcs_read32(GUEST_ACTIVITY_STATE) == GUEST_ACTIVITY_HLT) | |
1047 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); | |
1048 | } | |
1049 | ||
298101da | 1050 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
1051 | bool has_error_code, u32 error_code, |
1052 | bool reinject) | |
298101da | 1053 | { |
77ab6db0 | 1054 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8ab2d2e2 | 1055 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 1056 | |
8ab2d2e2 | 1057 | if (has_error_code) { |
77ab6db0 | 1058 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
1059 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
1060 | } | |
77ab6db0 | 1061 | |
7ffd92c5 | 1062 | if (vmx->rmode.vm86_active) { |
a92601bb MG |
1063 | if (kvm_inject_realmode_interrupt(vcpu, nr) != EMULATE_DONE) |
1064 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
77ab6db0 JK |
1065 | return; |
1066 | } | |
1067 | ||
66fd3f7f GN |
1068 | if (kvm_exception_is_soft(nr)) { |
1069 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
1070 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
1071 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
1072 | } else | |
1073 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
1074 | ||
1075 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
443381a8 | 1076 | vmx_clear_hlt(vcpu); |
298101da AK |
1077 | } |
1078 | ||
4e47c7a6 SY |
1079 | static bool vmx_rdtscp_supported(void) |
1080 | { | |
1081 | return cpu_has_vmx_rdtscp(); | |
1082 | } | |
1083 | ||
a75beee6 ED |
1084 | /* |
1085 | * Swap MSR entry in host/guest MSR entry array. | |
1086 | */ | |
8b9cf98c | 1087 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 1088 | { |
26bb0981 | 1089 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
1090 | |
1091 | tmp = vmx->guest_msrs[to]; | |
1092 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
1093 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
1094 | } |
1095 | ||
e38aea3e AK |
1096 | /* |
1097 | * Set up the vmcs to automatically save and restore system | |
1098 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
1099 | * mode, as fiddling with msrs is very expensive. | |
1100 | */ | |
8b9cf98c | 1101 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 1102 | { |
26bb0981 | 1103 | int save_nmsrs, index; |
5897297b | 1104 | unsigned long *msr_bitmap; |
e38aea3e | 1105 | |
33f9c505 | 1106 | vmx_load_host_state(vmx); |
a75beee6 ED |
1107 | save_nmsrs = 0; |
1108 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 1109 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 1110 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 1111 | if (index >= 0) |
8b9cf98c RR |
1112 | move_msr_up(vmx, index, save_nmsrs++); |
1113 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 1114 | if (index >= 0) |
8b9cf98c RR |
1115 | move_msr_up(vmx, index, save_nmsrs++); |
1116 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 1117 | if (index >= 0) |
8b9cf98c | 1118 | move_msr_up(vmx, index, save_nmsrs++); |
4e47c7a6 SY |
1119 | index = __find_msr_index(vmx, MSR_TSC_AUX); |
1120 | if (index >= 0 && vmx->rdtscp_enabled) | |
1121 | move_msr_up(vmx, index, save_nmsrs++); | |
a75beee6 | 1122 | /* |
8c06585d | 1123 | * MSR_STAR is only needed on long mode guests, and only |
a75beee6 ED |
1124 | * if efer.sce is enabled. |
1125 | */ | |
8c06585d | 1126 | index = __find_msr_index(vmx, MSR_STAR); |
f6801dff | 1127 | if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE)) |
8b9cf98c | 1128 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
1129 | } |
1130 | #endif | |
92c0d900 AK |
1131 | index = __find_msr_index(vmx, MSR_EFER); |
1132 | if (index >= 0 && update_transition_efer(vmx, index)) | |
26bb0981 | 1133 | move_msr_up(vmx, index, save_nmsrs++); |
e38aea3e | 1134 | |
26bb0981 | 1135 | vmx->save_nmsrs = save_nmsrs; |
5897297b AK |
1136 | |
1137 | if (cpu_has_vmx_msr_bitmap()) { | |
1138 | if (is_long_mode(&vmx->vcpu)) | |
1139 | msr_bitmap = vmx_msr_bitmap_longmode; | |
1140 | else | |
1141 | msr_bitmap = vmx_msr_bitmap_legacy; | |
1142 | ||
1143 | vmcs_write64(MSR_BITMAP, __pa(msr_bitmap)); | |
1144 | } | |
e38aea3e AK |
1145 | } |
1146 | ||
6aa8b732 AK |
1147 | /* |
1148 | * reads and returns guest's timestamp counter "register" | |
1149 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
1150 | */ | |
1151 | static u64 guest_read_tsc(void) | |
1152 | { | |
1153 | u64 host_tsc, tsc_offset; | |
1154 | ||
1155 | rdtscll(host_tsc); | |
1156 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
1157 | return host_tsc + tsc_offset; | |
1158 | } | |
1159 | ||
1160 | /* | |
99e3e30a | 1161 | * writes 'offset' into guest's timestamp counter offset register |
6aa8b732 | 1162 | */ |
99e3e30a | 1163 | static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
6aa8b732 | 1164 | { |
f4e1b3c8 | 1165 | vmcs_write64(TSC_OFFSET, offset); |
6aa8b732 AK |
1166 | } |
1167 | ||
e48672fa ZA |
1168 | static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) |
1169 | { | |
1170 | u64 offset = vmcs_read64(TSC_OFFSET); | |
1171 | vmcs_write64(TSC_OFFSET, offset + adjustment); | |
1172 | } | |
1173 | ||
6aa8b732 AK |
1174 | /* |
1175 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1176 | * Returns 0 on success, non-0 otherwise. | |
1177 | * Assumes vcpu_load() was already called. | |
1178 | */ | |
1179 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1180 | { | |
1181 | u64 data; | |
26bb0981 | 1182 | struct shared_msr_entry *msr; |
6aa8b732 AK |
1183 | |
1184 | if (!pdata) { | |
1185 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
1186 | return -EINVAL; | |
1187 | } | |
1188 | ||
1189 | switch (msr_index) { | |
05b3e0c2 | 1190 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1191 | case MSR_FS_BASE: |
1192 | data = vmcs_readl(GUEST_FS_BASE); | |
1193 | break; | |
1194 | case MSR_GS_BASE: | |
1195 | data = vmcs_readl(GUEST_GS_BASE); | |
1196 | break; | |
44ea2b17 AK |
1197 | case MSR_KERNEL_GS_BASE: |
1198 | vmx_load_host_state(to_vmx(vcpu)); | |
1199 | data = to_vmx(vcpu)->msr_guest_kernel_gs_base; | |
1200 | break; | |
26bb0981 | 1201 | #endif |
6aa8b732 | 1202 | case MSR_EFER: |
3bab1f5d | 1203 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
af24a4e4 | 1204 | case MSR_IA32_TSC: |
6aa8b732 AK |
1205 | data = guest_read_tsc(); |
1206 | break; | |
1207 | case MSR_IA32_SYSENTER_CS: | |
1208 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
1209 | break; | |
1210 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1211 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
1212 | break; |
1213 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1214 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 1215 | break; |
4e47c7a6 SY |
1216 | case MSR_TSC_AUX: |
1217 | if (!to_vmx(vcpu)->rdtscp_enabled) | |
1218 | return 1; | |
1219 | /* Otherwise falls through */ | |
6aa8b732 | 1220 | default: |
26bb0981 | 1221 | vmx_load_host_state(to_vmx(vcpu)); |
8b9cf98c | 1222 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d | 1223 | if (msr) { |
542423b0 | 1224 | vmx_load_host_state(to_vmx(vcpu)); |
3bab1f5d AK |
1225 | data = msr->data; |
1226 | break; | |
6aa8b732 | 1227 | } |
3bab1f5d | 1228 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
1229 | } |
1230 | ||
1231 | *pdata = data; | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * Writes msr value into into the appropriate "register". | |
1237 | * Returns 0 on success, non-0 otherwise. | |
1238 | * Assumes vcpu_load() was already called. | |
1239 | */ | |
1240 | static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1241 | { | |
a2fa3e9f | 1242 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1243 | struct shared_msr_entry *msr; |
2cc51560 ED |
1244 | int ret = 0; |
1245 | ||
6aa8b732 | 1246 | switch (msr_index) { |
3bab1f5d | 1247 | case MSR_EFER: |
a9b21b62 | 1248 | vmx_load_host_state(vmx); |
2cc51560 | 1249 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
2cc51560 | 1250 | break; |
16175a79 | 1251 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1252 | case MSR_FS_BASE: |
1253 | vmcs_writel(GUEST_FS_BASE, data); | |
1254 | break; | |
1255 | case MSR_GS_BASE: | |
1256 | vmcs_writel(GUEST_GS_BASE, data); | |
1257 | break; | |
44ea2b17 AK |
1258 | case MSR_KERNEL_GS_BASE: |
1259 | vmx_load_host_state(vmx); | |
1260 | vmx->msr_guest_kernel_gs_base = data; | |
1261 | break; | |
6aa8b732 AK |
1262 | #endif |
1263 | case MSR_IA32_SYSENTER_CS: | |
1264 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
1265 | break; | |
1266 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 1267 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
1268 | break; |
1269 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 1270 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 1271 | break; |
af24a4e4 | 1272 | case MSR_IA32_TSC: |
99e3e30a | 1273 | kvm_write_tsc(vcpu, data); |
6aa8b732 | 1274 | break; |
468d472f SY |
1275 | case MSR_IA32_CR_PAT: |
1276 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
1277 | vmcs_write64(GUEST_IA32_PAT, data); | |
1278 | vcpu->arch.pat = data; | |
1279 | break; | |
1280 | } | |
4e47c7a6 SY |
1281 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
1282 | break; | |
1283 | case MSR_TSC_AUX: | |
1284 | if (!vmx->rdtscp_enabled) | |
1285 | return 1; | |
1286 | /* Check reserved bit, higher 32 bits should be zero */ | |
1287 | if ((data >> 32) != 0) | |
1288 | return 1; | |
1289 | /* Otherwise falls through */ | |
6aa8b732 | 1290 | default: |
8b9cf98c | 1291 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d | 1292 | if (msr) { |
542423b0 | 1293 | vmx_load_host_state(vmx); |
3bab1f5d AK |
1294 | msr->data = data; |
1295 | break; | |
6aa8b732 | 1296 | } |
2cc51560 | 1297 | ret = kvm_set_msr_common(vcpu, msr_index, data); |
6aa8b732 AK |
1298 | } |
1299 | ||
2cc51560 | 1300 | return ret; |
6aa8b732 AK |
1301 | } |
1302 | ||
5fdbf976 | 1303 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 1304 | { |
5fdbf976 MT |
1305 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
1306 | switch (reg) { | |
1307 | case VCPU_REGS_RSP: | |
1308 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
1309 | break; | |
1310 | case VCPU_REGS_RIP: | |
1311 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
1312 | break; | |
6de4f3ad AK |
1313 | case VCPU_EXREG_PDPTR: |
1314 | if (enable_ept) | |
1315 | ept_save_pdptrs(vcpu); | |
1316 | break; | |
5fdbf976 MT |
1317 | default: |
1318 | break; | |
1319 | } | |
6aa8b732 AK |
1320 | } |
1321 | ||
355be0b9 | 1322 | static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
6aa8b732 | 1323 | { |
ae675ef0 JK |
1324 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1325 | vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]); | |
1326 | else | |
1327 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
1328 | ||
abd3f2d6 | 1329 | update_exception_bitmap(vcpu); |
6aa8b732 AK |
1330 | } |
1331 | ||
1332 | static __init int cpu_has_kvm_support(void) | |
1333 | { | |
6210e37b | 1334 | return cpu_has_vmx(); |
6aa8b732 AK |
1335 | } |
1336 | ||
1337 | static __init int vmx_disabled_by_bios(void) | |
1338 | { | |
1339 | u64 msr; | |
1340 | ||
1341 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
cafd6659 | 1342 | if (msr & FEATURE_CONTROL_LOCKED) { |
23f3e991 | 1343 | /* launched w/ TXT and VMX disabled */ |
cafd6659 SW |
1344 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
1345 | && tboot_enabled()) | |
1346 | return 1; | |
23f3e991 | 1347 | /* launched w/o TXT and VMX only enabled w/ TXT */ |
cafd6659 | 1348 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) |
23f3e991 | 1349 | && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
f9335afe SW |
1350 | && !tboot_enabled()) { |
1351 | printk(KERN_WARNING "kvm: disable TXT in the BIOS or " | |
23f3e991 | 1352 | "activate TXT before enabling KVM\n"); |
cafd6659 | 1353 | return 1; |
f9335afe | 1354 | } |
23f3e991 JC |
1355 | /* launched w/o TXT and VMX disabled */ |
1356 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) | |
1357 | && !tboot_enabled()) | |
1358 | return 1; | |
cafd6659 SW |
1359 | } |
1360 | ||
1361 | return 0; | |
6aa8b732 AK |
1362 | } |
1363 | ||
7725b894 DX |
1364 | static void kvm_cpu_vmxon(u64 addr) |
1365 | { | |
1366 | asm volatile (ASM_VMX_VMXON_RAX | |
1367 | : : "a"(&addr), "m"(addr) | |
1368 | : "memory", "cc"); | |
1369 | } | |
1370 | ||
10474ae8 | 1371 | static int hardware_enable(void *garbage) |
6aa8b732 AK |
1372 | { |
1373 | int cpu = raw_smp_processor_id(); | |
1374 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
cafd6659 | 1375 | u64 old, test_bits; |
6aa8b732 | 1376 | |
10474ae8 AG |
1377 | if (read_cr4() & X86_CR4_VMXE) |
1378 | return -EBUSY; | |
1379 | ||
543e4243 | 1380 | INIT_LIST_HEAD(&per_cpu(vcpus_on_cpu, cpu)); |
6aa8b732 | 1381 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
cafd6659 SW |
1382 | |
1383 | test_bits = FEATURE_CONTROL_LOCKED; | |
1384 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
1385 | if (tboot_enabled()) | |
1386 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX; | |
1387 | ||
1388 | if ((old & test_bits) != test_bits) { | |
6aa8b732 | 1389 | /* enable and lock */ |
cafd6659 SW |
1390 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits); |
1391 | } | |
66aee91a | 1392 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
10474ae8 | 1393 | |
4610c9cc DX |
1394 | if (vmm_exclusive) { |
1395 | kvm_cpu_vmxon(phys_addr); | |
1396 | ept_sync_global(); | |
1397 | } | |
10474ae8 | 1398 | |
3444d7da AK |
1399 | store_gdt(&__get_cpu_var(host_gdt)); |
1400 | ||
10474ae8 | 1401 | return 0; |
6aa8b732 AK |
1402 | } |
1403 | ||
543e4243 AK |
1404 | static void vmclear_local_vcpus(void) |
1405 | { | |
1406 | int cpu = raw_smp_processor_id(); | |
1407 | struct vcpu_vmx *vmx, *n; | |
1408 | ||
1409 | list_for_each_entry_safe(vmx, n, &per_cpu(vcpus_on_cpu, cpu), | |
1410 | local_vcpus_link) | |
1411 | __vcpu_clear(vmx); | |
1412 | } | |
1413 | ||
710ff4a8 EH |
1414 | |
1415 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
1416 | * tricks. | |
1417 | */ | |
1418 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 1419 | { |
4ecac3fd | 1420 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
6aa8b732 AK |
1421 | } |
1422 | ||
710ff4a8 EH |
1423 | static void hardware_disable(void *garbage) |
1424 | { | |
4610c9cc DX |
1425 | if (vmm_exclusive) { |
1426 | vmclear_local_vcpus(); | |
1427 | kvm_cpu_vmxoff(); | |
1428 | } | |
7725b894 | 1429 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
710ff4a8 EH |
1430 | } |
1431 | ||
1c3d14fe | 1432 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 1433 | u32 msr, u32 *result) |
1c3d14fe YS |
1434 | { |
1435 | u32 vmx_msr_low, vmx_msr_high; | |
1436 | u32 ctl = ctl_min | ctl_opt; | |
1437 | ||
1438 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
1439 | ||
1440 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
1441 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
1442 | ||
1443 | /* Ensure minimum (required) set of control bits are supported. */ | |
1444 | if (ctl_min & ~ctl) | |
002c7f7c | 1445 | return -EIO; |
1c3d14fe YS |
1446 | |
1447 | *result = ctl; | |
1448 | return 0; | |
1449 | } | |
1450 | ||
110312c8 AK |
1451 | static __init bool allow_1_setting(u32 msr, u32 ctl) |
1452 | { | |
1453 | u32 vmx_msr_low, vmx_msr_high; | |
1454 | ||
1455 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
1456 | return vmx_msr_high & ctl; | |
1457 | } | |
1458 | ||
002c7f7c | 1459 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
1460 | { |
1461 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 1462 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
1463 | u32 _pin_based_exec_control = 0; |
1464 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 1465 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
1466 | u32 _vmexit_control = 0; |
1467 | u32 _vmentry_control = 0; | |
1468 | ||
1469 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
f08864b4 | 1470 | opt = PIN_BASED_VIRTUAL_NMIS; |
1c3d14fe YS |
1471 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
1472 | &_pin_based_exec_control) < 0) | |
002c7f7c | 1473 | return -EIO; |
1c3d14fe | 1474 | |
443381a8 | 1475 | min = |
1c3d14fe YS |
1476 | #ifdef CONFIG_X86_64 |
1477 | CPU_BASED_CR8_LOAD_EXITING | | |
1478 | CPU_BASED_CR8_STORE_EXITING | | |
1479 | #endif | |
d56f546d SY |
1480 | CPU_BASED_CR3_LOAD_EXITING | |
1481 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
1482 | CPU_BASED_USE_IO_BITMAPS | |
1483 | CPU_BASED_MOV_DR_EXITING | | |
a7052897 | 1484 | CPU_BASED_USE_TSC_OFFSETING | |
59708670 SY |
1485 | CPU_BASED_MWAIT_EXITING | |
1486 | CPU_BASED_MONITOR_EXITING | | |
a7052897 | 1487 | CPU_BASED_INVLPG_EXITING; |
443381a8 AL |
1488 | |
1489 | if (yield_on_hlt) | |
1490 | min |= CPU_BASED_HLT_EXITING; | |
1491 | ||
f78e0e2e | 1492 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 1493 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 1494 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
1495 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
1496 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 1497 | return -EIO; |
6e5d865c YS |
1498 | #ifdef CONFIG_X86_64 |
1499 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
1500 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
1501 | ~CPU_BASED_CR8_STORE_EXITING; | |
1502 | #endif | |
f78e0e2e | 1503 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
1504 | min2 = 0; |
1505 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
2384d2b3 | 1506 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 1507 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 1508 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 | 1509 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
4e47c7a6 SY |
1510 | SECONDARY_EXEC_PAUSE_LOOP_EXITING | |
1511 | SECONDARY_EXEC_RDTSCP; | |
d56f546d SY |
1512 | if (adjust_vmx_controls(min2, opt2, |
1513 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
1514 | &_cpu_based_2nd_exec_control) < 0) |
1515 | return -EIO; | |
1516 | } | |
1517 | #ifndef CONFIG_X86_64 | |
1518 | if (!(_cpu_based_2nd_exec_control & | |
1519 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
1520 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
1521 | #endif | |
d56f546d | 1522 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
1523 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
1524 | enabled */ | |
5fff7d27 GN |
1525 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
1526 | CPU_BASED_CR3_STORE_EXITING | | |
1527 | CPU_BASED_INVLPG_EXITING); | |
d56f546d SY |
1528 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
1529 | vmx_capability.ept, vmx_capability.vpid); | |
1530 | } | |
1c3d14fe YS |
1531 | |
1532 | min = 0; | |
1533 | #ifdef CONFIG_X86_64 | |
1534 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
1535 | #endif | |
468d472f | 1536 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT; |
1c3d14fe YS |
1537 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
1538 | &_vmexit_control) < 0) | |
002c7f7c | 1539 | return -EIO; |
1c3d14fe | 1540 | |
468d472f SY |
1541 | min = 0; |
1542 | opt = VM_ENTRY_LOAD_IA32_PAT; | |
1c3d14fe YS |
1543 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
1544 | &_vmentry_control) < 0) | |
002c7f7c | 1545 | return -EIO; |
6aa8b732 | 1546 | |
c68876fd | 1547 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
1548 | |
1549 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
1550 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 1551 | return -EIO; |
1c3d14fe YS |
1552 | |
1553 | #ifdef CONFIG_X86_64 | |
1554 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
1555 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 1556 | return -EIO; |
1c3d14fe YS |
1557 | #endif |
1558 | ||
1559 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
1560 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 1561 | return -EIO; |
1c3d14fe | 1562 | |
002c7f7c YS |
1563 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
1564 | vmcs_conf->order = get_order(vmcs_config.size); | |
1565 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 1566 | |
002c7f7c YS |
1567 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
1568 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 1569 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
1570 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
1571 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe | 1572 | |
110312c8 AK |
1573 | cpu_has_load_ia32_efer = |
1574 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
1575 | VM_ENTRY_LOAD_IA32_EFER) | |
1576 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
1577 | VM_EXIT_LOAD_IA32_EFER); | |
1578 | ||
1c3d14fe | 1579 | return 0; |
c68876fd | 1580 | } |
6aa8b732 AK |
1581 | |
1582 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
1583 | { | |
1584 | int node = cpu_to_node(cpu); | |
1585 | struct page *pages; | |
1586 | struct vmcs *vmcs; | |
1587 | ||
6484eb3e | 1588 | pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
1589 | if (!pages) |
1590 | return NULL; | |
1591 | vmcs = page_address(pages); | |
1c3d14fe YS |
1592 | memset(vmcs, 0, vmcs_config.size); |
1593 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
1594 | return vmcs; |
1595 | } | |
1596 | ||
1597 | static struct vmcs *alloc_vmcs(void) | |
1598 | { | |
d3b2c338 | 1599 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
1600 | } |
1601 | ||
1602 | static void free_vmcs(struct vmcs *vmcs) | |
1603 | { | |
1c3d14fe | 1604 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
1605 | } |
1606 | ||
39959588 | 1607 | static void free_kvm_area(void) |
6aa8b732 AK |
1608 | { |
1609 | int cpu; | |
1610 | ||
3230bb47 | 1611 | for_each_possible_cpu(cpu) { |
6aa8b732 | 1612 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
1613 | per_cpu(vmxarea, cpu) = NULL; |
1614 | } | |
6aa8b732 AK |
1615 | } |
1616 | ||
6aa8b732 AK |
1617 | static __init int alloc_kvm_area(void) |
1618 | { | |
1619 | int cpu; | |
1620 | ||
3230bb47 | 1621 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
1622 | struct vmcs *vmcs; |
1623 | ||
1624 | vmcs = alloc_vmcs_cpu(cpu); | |
1625 | if (!vmcs) { | |
1626 | free_kvm_area(); | |
1627 | return -ENOMEM; | |
1628 | } | |
1629 | ||
1630 | per_cpu(vmxarea, cpu) = vmcs; | |
1631 | } | |
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | static __init int hardware_setup(void) | |
1636 | { | |
002c7f7c YS |
1637 | if (setup_vmcs_config(&vmcs_config) < 0) |
1638 | return -EIO; | |
50a37eb4 JR |
1639 | |
1640 | if (boot_cpu_has(X86_FEATURE_NX)) | |
1641 | kvm_enable_efer_bits(EFER_NX); | |
1642 | ||
93ba03c2 SY |
1643 | if (!cpu_has_vmx_vpid()) |
1644 | enable_vpid = 0; | |
1645 | ||
4bc9b982 SY |
1646 | if (!cpu_has_vmx_ept() || |
1647 | !cpu_has_vmx_ept_4levels()) { | |
93ba03c2 | 1648 | enable_ept = 0; |
3a624e29 NK |
1649 | enable_unrestricted_guest = 0; |
1650 | } | |
1651 | ||
1652 | if (!cpu_has_vmx_unrestricted_guest()) | |
1653 | enable_unrestricted_guest = 0; | |
93ba03c2 SY |
1654 | |
1655 | if (!cpu_has_vmx_flexpriority()) | |
1656 | flexpriority_enabled = 0; | |
1657 | ||
95ba8273 GN |
1658 | if (!cpu_has_vmx_tpr_shadow()) |
1659 | kvm_x86_ops->update_cr8_intercept = NULL; | |
1660 | ||
54dee993 MT |
1661 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) |
1662 | kvm_disable_largepages(); | |
1663 | ||
4b8d54f9 ZE |
1664 | if (!cpu_has_vmx_ple()) |
1665 | ple_gap = 0; | |
1666 | ||
6aa8b732 AK |
1667 | return alloc_kvm_area(); |
1668 | } | |
1669 | ||
1670 | static __exit void hardware_unsetup(void) | |
1671 | { | |
1672 | free_kvm_area(); | |
1673 | } | |
1674 | ||
6aa8b732 AK |
1675 | static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save) |
1676 | { | |
1677 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1678 | ||
6af11b9e | 1679 | if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) { |
6aa8b732 AK |
1680 | vmcs_write16(sf->selector, save->selector); |
1681 | vmcs_writel(sf->base, save->base); | |
1682 | vmcs_write32(sf->limit, save->limit); | |
1683 | vmcs_write32(sf->ar_bytes, save->ar); | |
1684 | } else { | |
1685 | u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK) | |
1686 | << AR_DPL_SHIFT; | |
1687 | vmcs_write32(sf->ar_bytes, 0x93 | dpl); | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
1692 | { | |
1693 | unsigned long flags; | |
a89a8fb9 | 1694 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 1695 | |
a89a8fb9 | 1696 | vmx->emulation_required = 1; |
7ffd92c5 | 1697 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 1698 | |
d0ba64f9 | 1699 | vmcs_write16(GUEST_TR_SELECTOR, vmx->rmode.tr.selector); |
7ffd92c5 AK |
1700 | vmcs_writel(GUEST_TR_BASE, vmx->rmode.tr.base); |
1701 | vmcs_write32(GUEST_TR_LIMIT, vmx->rmode.tr.limit); | |
1702 | vmcs_write32(GUEST_TR_AR_BYTES, vmx->rmode.tr.ar); | |
6aa8b732 AK |
1703 | |
1704 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
1705 | flags &= RMODE_GUEST_OWNED_EFLAGS_BITS; |
1706 | flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
6aa8b732 AK |
1707 | vmcs_writel(GUEST_RFLAGS, flags); |
1708 | ||
66aee91a RR |
1709 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
1710 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
1711 | |
1712 | update_exception_bitmap(vcpu); | |
1713 | ||
a89a8fb9 MG |
1714 | if (emulate_invalid_guest_state) |
1715 | return; | |
1716 | ||
7ffd92c5 AK |
1717 | fix_pmode_dataseg(VCPU_SREG_ES, &vmx->rmode.es); |
1718 | fix_pmode_dataseg(VCPU_SREG_DS, &vmx->rmode.ds); | |
1719 | fix_pmode_dataseg(VCPU_SREG_GS, &vmx->rmode.gs); | |
1720 | fix_pmode_dataseg(VCPU_SREG_FS, &vmx->rmode.fs); | |
6aa8b732 AK |
1721 | |
1722 | vmcs_write16(GUEST_SS_SELECTOR, 0); | |
1723 | vmcs_write32(GUEST_SS_AR_BYTES, 0x93); | |
1724 | ||
1725 | vmcs_write16(GUEST_CS_SELECTOR, | |
1726 | vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK); | |
1727 | vmcs_write32(GUEST_CS_AR_BYTES, 0x9b); | |
1728 | } | |
1729 | ||
d77c26fc | 1730 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 1731 | { |
bfc6d222 | 1732 | if (!kvm->arch.tss_addr) { |
bc6678a3 MT |
1733 | struct kvm_memslots *slots; |
1734 | gfn_t base_gfn; | |
1735 | ||
90d83dc3 | 1736 | slots = kvm_memslots(kvm); |
f495c6e5 | 1737 | base_gfn = slots->memslots[0].base_gfn + |
46a26bf5 | 1738 | kvm->memslots->memslots[0].npages - 3; |
cbc94022 IE |
1739 | return base_gfn << PAGE_SHIFT; |
1740 | } | |
bfc6d222 | 1741 | return kvm->arch.tss_addr; |
6aa8b732 AK |
1742 | } |
1743 | ||
1744 | static void fix_rmode_seg(int seg, struct kvm_save_segment *save) | |
1745 | { | |
1746 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
1747 | ||
1748 | save->selector = vmcs_read16(sf->selector); | |
1749 | save->base = vmcs_readl(sf->base); | |
1750 | save->limit = vmcs_read32(sf->limit); | |
1751 | save->ar = vmcs_read32(sf->ar_bytes); | |
15b00f32 | 1752 | vmcs_write16(sf->selector, save->base >> 4); |
444e863d | 1753 | vmcs_write32(sf->base, save->base & 0xffff0); |
6aa8b732 AK |
1754 | vmcs_write32(sf->limit, 0xffff); |
1755 | vmcs_write32(sf->ar_bytes, 0xf3); | |
444e863d GN |
1756 | if (save->base & 0xf) |
1757 | printk_once(KERN_WARNING "kvm: segment base is not paragraph" | |
1758 | " aligned when entering protected mode (seg=%d)", | |
1759 | seg); | |
6aa8b732 AK |
1760 | } |
1761 | ||
1762 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
1763 | { | |
1764 | unsigned long flags; | |
a89a8fb9 | 1765 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 1766 | |
3a624e29 NK |
1767 | if (enable_unrestricted_guest) |
1768 | return; | |
1769 | ||
a89a8fb9 | 1770 | vmx->emulation_required = 1; |
7ffd92c5 | 1771 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 1772 | |
776e58ea GN |
1773 | /* |
1774 | * Very old userspace does not call KVM_SET_TSS_ADDR before entering | |
1775 | * vcpu. Call it here with phys address pointing 16M below 4G. | |
1776 | */ | |
1777 | if (!vcpu->kvm->arch.tss_addr) { | |
1778 | printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be " | |
1779 | "called before entering vcpu\n"); | |
1780 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
1781 | vmx_set_tss_addr(vcpu->kvm, 0xfeffd000); | |
1782 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1783 | } | |
1784 | ||
d0ba64f9 | 1785 | vmx->rmode.tr.selector = vmcs_read16(GUEST_TR_SELECTOR); |
7ffd92c5 | 1786 | vmx->rmode.tr.base = vmcs_readl(GUEST_TR_BASE); |
6aa8b732 AK |
1787 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
1788 | ||
7ffd92c5 | 1789 | vmx->rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT); |
6aa8b732 AK |
1790 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
1791 | ||
7ffd92c5 | 1792 | vmx->rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES); |
6aa8b732 AK |
1793 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
1794 | ||
1795 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 | 1796 | vmx->rmode.save_rflags = flags; |
6aa8b732 | 1797 | |
053de044 | 1798 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
1799 | |
1800 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 1801 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
1802 | update_exception_bitmap(vcpu); |
1803 | ||
a89a8fb9 MG |
1804 | if (emulate_invalid_guest_state) |
1805 | goto continue_rmode; | |
1806 | ||
6aa8b732 AK |
1807 | vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4); |
1808 | vmcs_write32(GUEST_SS_LIMIT, 0xffff); | |
1809 | vmcs_write32(GUEST_SS_AR_BYTES, 0xf3); | |
1810 | ||
1811 | vmcs_write32(GUEST_CS_AR_BYTES, 0xf3); | |
abacf8df | 1812 | vmcs_write32(GUEST_CS_LIMIT, 0xffff); |
8cb5b033 AK |
1813 | if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000) |
1814 | vmcs_writel(GUEST_CS_BASE, 0xf0000); | |
6aa8b732 AK |
1815 | vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4); |
1816 | ||
7ffd92c5 AK |
1817 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.es); |
1818 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.ds); | |
1819 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.gs); | |
1820 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.fs); | |
75880a01 | 1821 | |
a89a8fb9 | 1822 | continue_rmode: |
8668a3c4 | 1823 | kvm_mmu_reset_context(vcpu); |
6aa8b732 AK |
1824 | } |
1825 | ||
401d10de AS |
1826 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
1827 | { | |
1828 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
1829 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
1830 | ||
1831 | if (!msr) | |
1832 | return; | |
401d10de | 1833 | |
44ea2b17 AK |
1834 | /* |
1835 | * Force kernel_gs_base reloading before EFER changes, as control | |
1836 | * of this msr depends on is_long_mode(). | |
1837 | */ | |
1838 | vmx_load_host_state(to_vmx(vcpu)); | |
f6801dff | 1839 | vcpu->arch.efer = efer; |
401d10de AS |
1840 | if (efer & EFER_LMA) { |
1841 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1842 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
1843 | VM_ENTRY_IA32E_MODE); | |
1844 | msr->data = efer; | |
1845 | } else { | |
1846 | vmcs_write32(VM_ENTRY_CONTROLS, | |
1847 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
1848 | ~VM_ENTRY_IA32E_MODE); | |
1849 | ||
1850 | msr->data = efer & ~EFER_LME; | |
1851 | } | |
1852 | setup_msrs(vmx); | |
1853 | } | |
1854 | ||
05b3e0c2 | 1855 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1856 | |
1857 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
1858 | { | |
1859 | u32 guest_tr_ar; | |
1860 | ||
1861 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); | |
1862 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
1863 | printk(KERN_DEBUG "%s: tss fixup for long mode. \n", | |
b8688d51 | 1864 | __func__); |
6aa8b732 AK |
1865 | vmcs_write32(GUEST_TR_AR_BYTES, |
1866 | (guest_tr_ar & ~AR_TYPE_MASK) | |
1867 | | AR_TYPE_BUSY_64_TSS); | |
1868 | } | |
da38f438 | 1869 | vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA); |
6aa8b732 AK |
1870 | } |
1871 | ||
1872 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
1873 | { | |
6aa8b732 AK |
1874 | vmcs_write32(VM_ENTRY_CONTROLS, |
1875 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 1876 | & ~VM_ENTRY_IA32E_MODE); |
da38f438 | 1877 | vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA); |
6aa8b732 AK |
1878 | } |
1879 | ||
1880 | #endif | |
1881 | ||
2384d2b3 SY |
1882 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
1883 | { | |
b9d762fa | 1884 | vpid_sync_context(to_vmx(vcpu)); |
dd180b3e XG |
1885 | if (enable_ept) { |
1886 | if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) | |
1887 | return; | |
4e1096d2 | 1888 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
dd180b3e | 1889 | } |
2384d2b3 SY |
1890 | } |
1891 | ||
e8467fda AK |
1892 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
1893 | { | |
1894 | ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; | |
1895 | ||
1896 | vcpu->arch.cr0 &= ~cr0_guest_owned_bits; | |
1897 | vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; | |
1898 | } | |
1899 | ||
aff48baa AK |
1900 | static void vmx_decache_cr3(struct kvm_vcpu *vcpu) |
1901 | { | |
1902 | if (enable_ept && is_paging(vcpu)) | |
1903 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); | |
1904 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
1905 | } | |
1906 | ||
25c4c276 | 1907 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 1908 | { |
fc78f519 AK |
1909 | ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; |
1910 | ||
1911 | vcpu->arch.cr4 &= ~cr4_guest_owned_bits; | |
1912 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits; | |
399badf3 AK |
1913 | } |
1914 | ||
1439442c SY |
1915 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
1916 | { | |
6de4f3ad AK |
1917 | if (!test_bit(VCPU_EXREG_PDPTR, |
1918 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
1919 | return; | |
1920 | ||
1439442c | 1921 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
ff03a073 JR |
1922 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]); |
1923 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]); | |
1924 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]); | |
1925 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]); | |
1439442c SY |
1926 | } |
1927 | } | |
1928 | ||
8f5d549f AK |
1929 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
1930 | { | |
1931 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { | |
ff03a073 JR |
1932 | vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0); |
1933 | vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
1934 | vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
1935 | vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
8f5d549f | 1936 | } |
6de4f3ad AK |
1937 | |
1938 | __set_bit(VCPU_EXREG_PDPTR, | |
1939 | (unsigned long *)&vcpu->arch.regs_avail); | |
1940 | __set_bit(VCPU_EXREG_PDPTR, | |
1941 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
1942 | } |
1943 | ||
1439442c SY |
1944 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1945 | ||
1946 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
1947 | unsigned long cr0, | |
1948 | struct kvm_vcpu *vcpu) | |
1949 | { | |
aff48baa | 1950 | vmx_decache_cr3(vcpu); |
1439442c SY |
1951 | if (!(cr0 & X86_CR0_PG)) { |
1952 | /* From paging/starting to nonpaging */ | |
1953 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 1954 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
1955 | (CPU_BASED_CR3_LOAD_EXITING | |
1956 | CPU_BASED_CR3_STORE_EXITING)); | |
1957 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 1958 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c SY |
1959 | } else if (!is_paging(vcpu)) { |
1960 | /* From nonpaging to paging */ | |
1961 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 1962 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
1963 | ~(CPU_BASED_CR3_LOAD_EXITING | |
1964 | CPU_BASED_CR3_STORE_EXITING)); | |
1965 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 1966 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c | 1967 | } |
95eb84a7 SY |
1968 | |
1969 | if (!(cr0 & X86_CR0_WP)) | |
1970 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
1971 | } |
1972 | ||
6aa8b732 AK |
1973 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1974 | { | |
7ffd92c5 | 1975 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
1976 | unsigned long hw_cr0; |
1977 | ||
1978 | if (enable_unrestricted_guest) | |
1979 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST) | |
1980 | | KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; | |
1981 | else | |
1982 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON; | |
1439442c | 1983 | |
7ffd92c5 | 1984 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1985 | enter_pmode(vcpu); |
1986 | ||
7ffd92c5 | 1987 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
6aa8b732 AK |
1988 | enter_rmode(vcpu); |
1989 | ||
05b3e0c2 | 1990 | #ifdef CONFIG_X86_64 |
f6801dff | 1991 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 1992 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 1993 | enter_lmode(vcpu); |
707d92fa | 1994 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
1995 | exit_lmode(vcpu); |
1996 | } | |
1997 | #endif | |
1998 | ||
089d034e | 1999 | if (enable_ept) |
1439442c SY |
2000 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
2001 | ||
02daab21 | 2002 | if (!vcpu->fpu_active) |
81231c69 | 2003 | hw_cr0 |= X86_CR0_TS | X86_CR0_MP; |
02daab21 | 2004 | |
6aa8b732 | 2005 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 2006 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 2007 | vcpu->arch.cr0 = cr0; |
6aa8b732 AK |
2008 | } |
2009 | ||
1439442c SY |
2010 | static u64 construct_eptp(unsigned long root_hpa) |
2011 | { | |
2012 | u64 eptp; | |
2013 | ||
2014 | /* TODO write the value reading from MSR */ | |
2015 | eptp = VMX_EPT_DEFAULT_MT | | |
2016 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
2017 | eptp |= (root_hpa & PAGE_MASK); | |
2018 | ||
2019 | return eptp; | |
2020 | } | |
2021 | ||
6aa8b732 AK |
2022 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
2023 | { | |
1439442c SY |
2024 | unsigned long guest_cr3; |
2025 | u64 eptp; | |
2026 | ||
2027 | guest_cr3 = cr3; | |
089d034e | 2028 | if (enable_ept) { |
1439442c SY |
2029 | eptp = construct_eptp(cr3); |
2030 | vmcs_write64(EPT_POINTER, eptp); | |
9f8fe504 | 2031 | guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) : |
b927a3ce | 2032 | vcpu->kvm->arch.ept_identity_map_addr; |
7c93be44 | 2033 | ept_load_pdptrs(vcpu); |
1439442c SY |
2034 | } |
2035 | ||
2384d2b3 | 2036 | vmx_flush_tlb(vcpu); |
1439442c | 2037 | vmcs_writel(GUEST_CR3, guest_cr3); |
6aa8b732 AK |
2038 | } |
2039 | ||
2040 | static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
2041 | { | |
7ffd92c5 | 2042 | unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ? |
1439442c SY |
2043 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); |
2044 | ||
ad312c7c | 2045 | vcpu->arch.cr4 = cr4; |
bc23008b AK |
2046 | if (enable_ept) { |
2047 | if (!is_paging(vcpu)) { | |
2048 | hw_cr4 &= ~X86_CR4_PAE; | |
2049 | hw_cr4 |= X86_CR4_PSE; | |
2050 | } else if (!(cr4 & X86_CR4_PAE)) { | |
2051 | hw_cr4 &= ~X86_CR4_PAE; | |
2052 | } | |
2053 | } | |
1439442c SY |
2054 | |
2055 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
2056 | vmcs_writel(GUEST_CR4, hw_cr4); | |
6aa8b732 AK |
2057 | } |
2058 | ||
6aa8b732 AK |
2059 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
2060 | struct kvm_segment *var, int seg) | |
2061 | { | |
a9179499 | 2062 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 2063 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
a9179499 | 2064 | struct kvm_save_segment *save; |
6aa8b732 AK |
2065 | u32 ar; |
2066 | ||
a9179499 AK |
2067 | if (vmx->rmode.vm86_active |
2068 | && (seg == VCPU_SREG_TR || seg == VCPU_SREG_ES | |
2069 | || seg == VCPU_SREG_DS || seg == VCPU_SREG_FS | |
2070 | || seg == VCPU_SREG_GS) | |
2071 | && !emulate_invalid_guest_state) { | |
2072 | switch (seg) { | |
2073 | case VCPU_SREG_TR: save = &vmx->rmode.tr; break; | |
2074 | case VCPU_SREG_ES: save = &vmx->rmode.es; break; | |
2075 | case VCPU_SREG_DS: save = &vmx->rmode.ds; break; | |
2076 | case VCPU_SREG_FS: save = &vmx->rmode.fs; break; | |
2077 | case VCPU_SREG_GS: save = &vmx->rmode.gs; break; | |
2078 | default: BUG(); | |
2079 | } | |
2080 | var->selector = save->selector; | |
2081 | var->base = save->base; | |
2082 | var->limit = save->limit; | |
2083 | ar = save->ar; | |
2084 | if (seg == VCPU_SREG_TR | |
2085 | || var->selector == vmcs_read16(sf->selector)) | |
2086 | goto use_saved_rmode_seg; | |
2087 | } | |
6aa8b732 AK |
2088 | var->base = vmcs_readl(sf->base); |
2089 | var->limit = vmcs_read32(sf->limit); | |
2090 | var->selector = vmcs_read16(sf->selector); | |
2091 | ar = vmcs_read32(sf->ar_bytes); | |
a9179499 | 2092 | use_saved_rmode_seg: |
9fd4a3b7 | 2093 | if ((ar & AR_UNUSABLE_MASK) && !emulate_invalid_guest_state) |
6aa8b732 AK |
2094 | ar = 0; |
2095 | var->type = ar & 15; | |
2096 | var->s = (ar >> 4) & 1; | |
2097 | var->dpl = (ar >> 5) & 3; | |
2098 | var->present = (ar >> 7) & 1; | |
2099 | var->avl = (ar >> 12) & 1; | |
2100 | var->l = (ar >> 13) & 1; | |
2101 | var->db = (ar >> 14) & 1; | |
2102 | var->g = (ar >> 15) & 1; | |
2103 | var->unusable = (ar >> 16) & 1; | |
2104 | } | |
2105 | ||
a9179499 AK |
2106 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
2107 | { | |
2108 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
2109 | struct kvm_segment s; | |
2110 | ||
2111 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
2112 | vmx_get_segment(vcpu, &s, seg); | |
2113 | return s.base; | |
2114 | } | |
2115 | return vmcs_readl(sf->base); | |
2116 | } | |
2117 | ||
2e4d2653 IE |
2118 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
2119 | { | |
3eeb3288 | 2120 | if (!is_protmode(vcpu)) |
2e4d2653 IE |
2121 | return 0; |
2122 | ||
f6e78475 | 2123 | if (kvm_get_rflags(vcpu) & X86_EFLAGS_VM) /* if virtual 8086 */ |
2e4d2653 IE |
2124 | return 3; |
2125 | ||
eab4b8aa | 2126 | return vmcs_read16(GUEST_CS_SELECTOR) & 3; |
2e4d2653 IE |
2127 | } |
2128 | ||
653e3108 | 2129 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 2130 | { |
6aa8b732 AK |
2131 | u32 ar; |
2132 | ||
653e3108 | 2133 | if (var->unusable) |
6aa8b732 AK |
2134 | ar = 1 << 16; |
2135 | else { | |
2136 | ar = var->type & 15; | |
2137 | ar |= (var->s & 1) << 4; | |
2138 | ar |= (var->dpl & 3) << 5; | |
2139 | ar |= (var->present & 1) << 7; | |
2140 | ar |= (var->avl & 1) << 12; | |
2141 | ar |= (var->l & 1) << 13; | |
2142 | ar |= (var->db & 1) << 14; | |
2143 | ar |= (var->g & 1) << 15; | |
2144 | } | |
f7fbf1fd UL |
2145 | if (ar == 0) /* a 0 value means unusable */ |
2146 | ar = AR_UNUSABLE_MASK; | |
653e3108 AK |
2147 | |
2148 | return ar; | |
2149 | } | |
2150 | ||
2151 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
2152 | struct kvm_segment *var, int seg) | |
2153 | { | |
7ffd92c5 | 2154 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
653e3108 AK |
2155 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
2156 | u32 ar; | |
2157 | ||
7ffd92c5 | 2158 | if (vmx->rmode.vm86_active && seg == VCPU_SREG_TR) { |
a8ba6c26 | 2159 | vmcs_write16(sf->selector, var->selector); |
7ffd92c5 AK |
2160 | vmx->rmode.tr.selector = var->selector; |
2161 | vmx->rmode.tr.base = var->base; | |
2162 | vmx->rmode.tr.limit = var->limit; | |
2163 | vmx->rmode.tr.ar = vmx_segment_access_rights(var); | |
653e3108 AK |
2164 | return; |
2165 | } | |
2166 | vmcs_writel(sf->base, var->base); | |
2167 | vmcs_write32(sf->limit, var->limit); | |
2168 | vmcs_write16(sf->selector, var->selector); | |
7ffd92c5 | 2169 | if (vmx->rmode.vm86_active && var->s) { |
653e3108 AK |
2170 | /* |
2171 | * Hack real-mode segments into vm86 compatibility. | |
2172 | */ | |
2173 | if (var->base == 0xffff0000 && var->selector == 0xf000) | |
2174 | vmcs_writel(sf->base, 0xf0000); | |
2175 | ar = 0xf3; | |
2176 | } else | |
2177 | ar = vmx_segment_access_rights(var); | |
3a624e29 NK |
2178 | |
2179 | /* | |
2180 | * Fix the "Accessed" bit in AR field of segment registers for older | |
2181 | * qemu binaries. | |
2182 | * IA32 arch specifies that at the time of processor reset the | |
2183 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
2184 | * is setting it to 0 in the usedland code. This causes invalid guest | |
2185 | * state vmexit when "unrestricted guest" mode is turned on. | |
2186 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
2187 | * tree. Newer qemu binaries with that qemu fix would not need this | |
2188 | * kvm hack. | |
2189 | */ | |
2190 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
2191 | ar |= 0x1; /* Accessed */ | |
2192 | ||
6aa8b732 AK |
2193 | vmcs_write32(sf->ar_bytes, ar); |
2194 | } | |
2195 | ||
6aa8b732 AK |
2196 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
2197 | { | |
2198 | u32 ar = vmcs_read32(GUEST_CS_AR_BYTES); | |
2199 | ||
2200 | *db = (ar >> 14) & 1; | |
2201 | *l = (ar >> 13) & 1; | |
2202 | } | |
2203 | ||
89a27f4d | 2204 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2205 | { |
89a27f4d GN |
2206 | dt->size = vmcs_read32(GUEST_IDTR_LIMIT); |
2207 | dt->address = vmcs_readl(GUEST_IDTR_BASE); | |
6aa8b732 AK |
2208 | } |
2209 | ||
89a27f4d | 2210 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2211 | { |
89a27f4d GN |
2212 | vmcs_write32(GUEST_IDTR_LIMIT, dt->size); |
2213 | vmcs_writel(GUEST_IDTR_BASE, dt->address); | |
6aa8b732 AK |
2214 | } |
2215 | ||
89a27f4d | 2216 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2217 | { |
89a27f4d GN |
2218 | dt->size = vmcs_read32(GUEST_GDTR_LIMIT); |
2219 | dt->address = vmcs_readl(GUEST_GDTR_BASE); | |
6aa8b732 AK |
2220 | } |
2221 | ||
89a27f4d | 2222 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 2223 | { |
89a27f4d GN |
2224 | vmcs_write32(GUEST_GDTR_LIMIT, dt->size); |
2225 | vmcs_writel(GUEST_GDTR_BASE, dt->address); | |
6aa8b732 AK |
2226 | } |
2227 | ||
648dfaa7 MG |
2228 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
2229 | { | |
2230 | struct kvm_segment var; | |
2231 | u32 ar; | |
2232 | ||
2233 | vmx_get_segment(vcpu, &var, seg); | |
2234 | ar = vmx_segment_access_rights(&var); | |
2235 | ||
2236 | if (var.base != (var.selector << 4)) | |
2237 | return false; | |
2238 | if (var.limit != 0xffff) | |
2239 | return false; | |
2240 | if (ar != 0xf3) | |
2241 | return false; | |
2242 | ||
2243 | return true; | |
2244 | } | |
2245 | ||
2246 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
2247 | { | |
2248 | struct kvm_segment cs; | |
2249 | unsigned int cs_rpl; | |
2250 | ||
2251 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2252 | cs_rpl = cs.selector & SELECTOR_RPL_MASK; | |
2253 | ||
1872a3f4 AK |
2254 | if (cs.unusable) |
2255 | return false; | |
648dfaa7 MG |
2256 | if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK)) |
2257 | return false; | |
2258 | if (!cs.s) | |
2259 | return false; | |
1872a3f4 | 2260 | if (cs.type & AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
2261 | if (cs.dpl > cs_rpl) |
2262 | return false; | |
1872a3f4 | 2263 | } else { |
648dfaa7 MG |
2264 | if (cs.dpl != cs_rpl) |
2265 | return false; | |
2266 | } | |
2267 | if (!cs.present) | |
2268 | return false; | |
2269 | ||
2270 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
2271 | return true; | |
2272 | } | |
2273 | ||
2274 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
2275 | { | |
2276 | struct kvm_segment ss; | |
2277 | unsigned int ss_rpl; | |
2278 | ||
2279 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
2280 | ss_rpl = ss.selector & SELECTOR_RPL_MASK; | |
2281 | ||
1872a3f4 AK |
2282 | if (ss.unusable) |
2283 | return true; | |
2284 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
2285 | return false; |
2286 | if (!ss.s) | |
2287 | return false; | |
2288 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
2289 | return false; | |
2290 | if (!ss.present) | |
2291 | return false; | |
2292 | ||
2293 | return true; | |
2294 | } | |
2295 | ||
2296 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
2297 | { | |
2298 | struct kvm_segment var; | |
2299 | unsigned int rpl; | |
2300 | ||
2301 | vmx_get_segment(vcpu, &var, seg); | |
2302 | rpl = var.selector & SELECTOR_RPL_MASK; | |
2303 | ||
1872a3f4 AK |
2304 | if (var.unusable) |
2305 | return true; | |
648dfaa7 MG |
2306 | if (!var.s) |
2307 | return false; | |
2308 | if (!var.present) | |
2309 | return false; | |
2310 | if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) { | |
2311 | if (var.dpl < rpl) /* DPL < RPL */ | |
2312 | return false; | |
2313 | } | |
2314 | ||
2315 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
2316 | * rights flags | |
2317 | */ | |
2318 | return true; | |
2319 | } | |
2320 | ||
2321 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
2322 | { | |
2323 | struct kvm_segment tr; | |
2324 | ||
2325 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
2326 | ||
1872a3f4 AK |
2327 | if (tr.unusable) |
2328 | return false; | |
648dfaa7 MG |
2329 | if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
2330 | return false; | |
1872a3f4 | 2331 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
2332 | return false; |
2333 | if (!tr.present) | |
2334 | return false; | |
2335 | ||
2336 | return true; | |
2337 | } | |
2338 | ||
2339 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
2340 | { | |
2341 | struct kvm_segment ldtr; | |
2342 | ||
2343 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
2344 | ||
1872a3f4 AK |
2345 | if (ldtr.unusable) |
2346 | return true; | |
648dfaa7 MG |
2347 | if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
2348 | return false; | |
2349 | if (ldtr.type != 2) | |
2350 | return false; | |
2351 | if (!ldtr.present) | |
2352 | return false; | |
2353 | ||
2354 | return true; | |
2355 | } | |
2356 | ||
2357 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
2358 | { | |
2359 | struct kvm_segment cs, ss; | |
2360 | ||
2361 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2362 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
2363 | ||
2364 | return ((cs.selector & SELECTOR_RPL_MASK) == | |
2365 | (ss.selector & SELECTOR_RPL_MASK)); | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * Check if guest state is valid. Returns true if valid, false if | |
2370 | * not. | |
2371 | * We assume that registers are always usable | |
2372 | */ | |
2373 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
2374 | { | |
2375 | /* real mode guest state checks */ | |
3eeb3288 | 2376 | if (!is_protmode(vcpu)) { |
648dfaa7 MG |
2377 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) |
2378 | return false; | |
2379 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
2380 | return false; | |
2381 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
2382 | return false; | |
2383 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
2384 | return false; | |
2385 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
2386 | return false; | |
2387 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
2388 | return false; | |
2389 | } else { | |
2390 | /* protected mode guest state checks */ | |
2391 | if (!cs_ss_rpl_check(vcpu)) | |
2392 | return false; | |
2393 | if (!code_segment_valid(vcpu)) | |
2394 | return false; | |
2395 | if (!stack_segment_valid(vcpu)) | |
2396 | return false; | |
2397 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
2398 | return false; | |
2399 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
2400 | return false; | |
2401 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
2402 | return false; | |
2403 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
2404 | return false; | |
2405 | if (!tr_valid(vcpu)) | |
2406 | return false; | |
2407 | if (!ldtr_valid(vcpu)) | |
2408 | return false; | |
2409 | } | |
2410 | /* TODO: | |
2411 | * - Add checks on RIP | |
2412 | * - Add checks on RFLAGS | |
2413 | */ | |
2414 | ||
2415 | return true; | |
2416 | } | |
2417 | ||
d77c26fc | 2418 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 2419 | { |
40dcaa9f | 2420 | gfn_t fn; |
195aefde | 2421 | u16 data = 0; |
40dcaa9f | 2422 | int r, idx, ret = 0; |
6aa8b732 | 2423 | |
40dcaa9f XG |
2424 | idx = srcu_read_lock(&kvm->srcu); |
2425 | fn = rmode_tss_base(kvm) >> PAGE_SHIFT; | |
195aefde IE |
2426 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
2427 | if (r < 0) | |
10589a46 | 2428 | goto out; |
195aefde | 2429 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
2430 | r = kvm_write_guest_page(kvm, fn++, &data, |
2431 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 2432 | if (r < 0) |
10589a46 | 2433 | goto out; |
195aefde IE |
2434 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
2435 | if (r < 0) | |
10589a46 | 2436 | goto out; |
195aefde IE |
2437 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
2438 | if (r < 0) | |
10589a46 | 2439 | goto out; |
195aefde | 2440 | data = ~0; |
10589a46 MT |
2441 | r = kvm_write_guest_page(kvm, fn, &data, |
2442 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
2443 | sizeof(u8)); | |
195aefde | 2444 | if (r < 0) |
10589a46 MT |
2445 | goto out; |
2446 | ||
2447 | ret = 1; | |
2448 | out: | |
40dcaa9f | 2449 | srcu_read_unlock(&kvm->srcu, idx); |
10589a46 | 2450 | return ret; |
6aa8b732 AK |
2451 | } |
2452 | ||
b7ebfb05 SY |
2453 | static int init_rmode_identity_map(struct kvm *kvm) |
2454 | { | |
40dcaa9f | 2455 | int i, idx, r, ret; |
b7ebfb05 SY |
2456 | pfn_t identity_map_pfn; |
2457 | u32 tmp; | |
2458 | ||
089d034e | 2459 | if (!enable_ept) |
b7ebfb05 SY |
2460 | return 1; |
2461 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { | |
2462 | printk(KERN_ERR "EPT: identity-mapping pagetable " | |
2463 | "haven't been allocated!\n"); | |
2464 | return 0; | |
2465 | } | |
2466 | if (likely(kvm->arch.ept_identity_pagetable_done)) | |
2467 | return 1; | |
2468 | ret = 0; | |
b927a3ce | 2469 | identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; |
40dcaa9f | 2470 | idx = srcu_read_lock(&kvm->srcu); |
b7ebfb05 SY |
2471 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
2472 | if (r < 0) | |
2473 | goto out; | |
2474 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
2475 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
2476 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
2477 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
2478 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
2479 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
2480 | if (r < 0) | |
2481 | goto out; | |
2482 | } | |
2483 | kvm->arch.ept_identity_pagetable_done = true; | |
2484 | ret = 1; | |
2485 | out: | |
40dcaa9f | 2486 | srcu_read_unlock(&kvm->srcu, idx); |
b7ebfb05 SY |
2487 | return ret; |
2488 | } | |
2489 | ||
6aa8b732 AK |
2490 | static void seg_setup(int seg) |
2491 | { | |
2492 | struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; | |
3a624e29 | 2493 | unsigned int ar; |
6aa8b732 AK |
2494 | |
2495 | vmcs_write16(sf->selector, 0); | |
2496 | vmcs_writel(sf->base, 0); | |
2497 | vmcs_write32(sf->limit, 0xffff); | |
3a624e29 NK |
2498 | if (enable_unrestricted_guest) { |
2499 | ar = 0x93; | |
2500 | if (seg == VCPU_SREG_CS) | |
2501 | ar |= 0x08; /* code segment */ | |
2502 | } else | |
2503 | ar = 0xf3; | |
2504 | ||
2505 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
2506 | } |
2507 | ||
f78e0e2e SY |
2508 | static int alloc_apic_access_page(struct kvm *kvm) |
2509 | { | |
2510 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2511 | int r = 0; | |
2512 | ||
79fac95e | 2513 | mutex_lock(&kvm->slots_lock); |
bfc6d222 | 2514 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
2515 | goto out; |
2516 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
2517 | kvm_userspace_mem.flags = 0; | |
2518 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
2519 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
2520 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2521 | if (r) | |
2522 | goto out; | |
72dc67a6 | 2523 | |
bfc6d222 | 2524 | kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00); |
f78e0e2e | 2525 | out: |
79fac95e | 2526 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
2527 | return r; |
2528 | } | |
2529 | ||
b7ebfb05 SY |
2530 | static int alloc_identity_pagetable(struct kvm *kvm) |
2531 | { | |
2532 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2533 | int r = 0; | |
2534 | ||
79fac95e | 2535 | mutex_lock(&kvm->slots_lock); |
b7ebfb05 SY |
2536 | if (kvm->arch.ept_identity_pagetable) |
2537 | goto out; | |
2538 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
2539 | kvm_userspace_mem.flags = 0; | |
b927a3ce SY |
2540 | kvm_userspace_mem.guest_phys_addr = |
2541 | kvm->arch.ept_identity_map_addr; | |
b7ebfb05 SY |
2542 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
2543 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2544 | if (r) | |
2545 | goto out; | |
2546 | ||
b7ebfb05 | 2547 | kvm->arch.ept_identity_pagetable = gfn_to_page(kvm, |
b927a3ce | 2548 | kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); |
b7ebfb05 | 2549 | out: |
79fac95e | 2550 | mutex_unlock(&kvm->slots_lock); |
b7ebfb05 SY |
2551 | return r; |
2552 | } | |
2553 | ||
2384d2b3 SY |
2554 | static void allocate_vpid(struct vcpu_vmx *vmx) |
2555 | { | |
2556 | int vpid; | |
2557 | ||
2558 | vmx->vpid = 0; | |
919818ab | 2559 | if (!enable_vpid) |
2384d2b3 SY |
2560 | return; |
2561 | spin_lock(&vmx_vpid_lock); | |
2562 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
2563 | if (vpid < VMX_NR_VPIDS) { | |
2564 | vmx->vpid = vpid; | |
2565 | __set_bit(vpid, vmx_vpid_bitmap); | |
2566 | } | |
2567 | spin_unlock(&vmx_vpid_lock); | |
2568 | } | |
2569 | ||
cdbecfc3 LJ |
2570 | static void free_vpid(struct vcpu_vmx *vmx) |
2571 | { | |
2572 | if (!enable_vpid) | |
2573 | return; | |
2574 | spin_lock(&vmx_vpid_lock); | |
2575 | if (vmx->vpid != 0) | |
2576 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
2577 | spin_unlock(&vmx_vpid_lock); | |
2578 | } | |
2579 | ||
5897297b | 2580 | static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr) |
25c5f225 | 2581 | { |
3e7c73e9 | 2582 | int f = sizeof(unsigned long); |
25c5f225 SY |
2583 | |
2584 | if (!cpu_has_vmx_msr_bitmap()) | |
2585 | return; | |
2586 | ||
2587 | /* | |
2588 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
2589 | * have the write-low and read-high bitmap offsets the wrong way round. | |
2590 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
2591 | */ | |
25c5f225 | 2592 | if (msr <= 0x1fff) { |
3e7c73e9 AK |
2593 | __clear_bit(msr, msr_bitmap + 0x000 / f); /* read-low */ |
2594 | __clear_bit(msr, msr_bitmap + 0x800 / f); /* write-low */ | |
25c5f225 SY |
2595 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
2596 | msr &= 0x1fff; | |
3e7c73e9 AK |
2597 | __clear_bit(msr, msr_bitmap + 0x400 / f); /* read-high */ |
2598 | __clear_bit(msr, msr_bitmap + 0xc00 / f); /* write-high */ | |
25c5f225 | 2599 | } |
25c5f225 SY |
2600 | } |
2601 | ||
5897297b AK |
2602 | static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only) |
2603 | { | |
2604 | if (!longmode_only) | |
2605 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, msr); | |
2606 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, msr); | |
2607 | } | |
2608 | ||
6aa8b732 AK |
2609 | /* |
2610 | * Sets up the vmcs for emulated real mode. | |
2611 | */ | |
8b9cf98c | 2612 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 2613 | { |
468d472f | 2614 | u32 host_sysenter_cs, msr_low, msr_high; |
6aa8b732 | 2615 | u32 junk; |
f4e1b3c8 | 2616 | u64 host_pat; |
6aa8b732 | 2617 | unsigned long a; |
89a27f4d | 2618 | struct desc_ptr dt; |
6aa8b732 | 2619 | int i; |
cd2276a7 | 2620 | unsigned long kvm_vmx_return; |
6e5d865c | 2621 | u32 exec_control; |
6aa8b732 | 2622 | |
6aa8b732 | 2623 | /* I/O */ |
3e7c73e9 AK |
2624 | vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a)); |
2625 | vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b)); | |
6aa8b732 | 2626 | |
25c5f225 | 2627 | if (cpu_has_vmx_msr_bitmap()) |
5897297b | 2628 | vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy)); |
25c5f225 | 2629 | |
6aa8b732 AK |
2630 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
2631 | ||
6aa8b732 | 2632 | /* Control */ |
1c3d14fe YS |
2633 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
2634 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c YS |
2635 | |
2636 | exec_control = vmcs_config.cpu_based_exec_ctrl; | |
2637 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
2638 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
2639 | #ifdef CONFIG_X86_64 | |
2640 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
2641 | CPU_BASED_CR8_LOAD_EXITING; | |
2642 | #endif | |
2643 | } | |
089d034e | 2644 | if (!enable_ept) |
d56f546d | 2645 | exec_control |= CPU_BASED_CR3_STORE_EXITING | |
83dbc83a MT |
2646 | CPU_BASED_CR3_LOAD_EXITING | |
2647 | CPU_BASED_INVLPG_EXITING; | |
6e5d865c | 2648 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); |
6aa8b732 | 2649 | |
83ff3b9d SY |
2650 | if (cpu_has_secondary_exec_ctrls()) { |
2651 | exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
2652 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2653 | exec_control &= | |
2654 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
2384d2b3 SY |
2655 | if (vmx->vpid == 0) |
2656 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
046d8710 | 2657 | if (!enable_ept) { |
d56f546d | 2658 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; |
046d8710 SY |
2659 | enable_unrestricted_guest = 0; |
2660 | } | |
3a624e29 NK |
2661 | if (!enable_unrestricted_guest) |
2662 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
4b8d54f9 ZE |
2663 | if (!ple_gap) |
2664 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
83ff3b9d SY |
2665 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); |
2666 | } | |
f78e0e2e | 2667 | |
4b8d54f9 ZE |
2668 | if (ple_gap) { |
2669 | vmcs_write32(PLE_GAP, ple_gap); | |
2670 | vmcs_write32(PLE_WINDOW, ple_window); | |
2671 | } | |
2672 | ||
c7addb90 AK |
2673 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf); |
2674 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf); | |
6aa8b732 AK |
2675 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
2676 | ||
1c11e713 | 2677 | vmcs_writel(HOST_CR0, read_cr0() | X86_CR0_TS); /* 22.2.3 */ |
6aa8b732 AK |
2678 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
2679 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
2680 | ||
2681 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
2682 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
2683 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
9581d442 AK |
2684 | vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */ |
2685 | vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */ | |
6aa8b732 | 2686 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
05b3e0c2 | 2687 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2688 | rdmsrl(MSR_FS_BASE, a); |
2689 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
2690 | rdmsrl(MSR_GS_BASE, a); | |
2691 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
2692 | #else | |
2693 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
2694 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
2695 | #endif | |
2696 | ||
2697 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
2698 | ||
ec68798c | 2699 | native_store_idt(&dt); |
89a27f4d | 2700 | vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */ |
6aa8b732 | 2701 | |
d77c26fc | 2702 | asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return)); |
cd2276a7 | 2703 | vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */ |
2cc51560 ED |
2704 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
2705 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
61d2ef2c | 2706 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host)); |
2cc51560 | 2707 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
61d2ef2c | 2708 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest)); |
6aa8b732 AK |
2709 | |
2710 | rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk); | |
2711 | vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs); | |
2712 | rdmsrl(MSR_IA32_SYSENTER_ESP, a); | |
2713 | vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */ | |
2714 | rdmsrl(MSR_IA32_SYSENTER_EIP, a); | |
2715 | vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */ | |
2716 | ||
468d472f SY |
2717 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { |
2718 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
2719 | host_pat = msr_low | ((u64) msr_high << 32); | |
2720 | vmcs_write64(HOST_IA32_PAT, host_pat); | |
2721 | } | |
2722 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
2723 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); | |
2724 | host_pat = msr_low | ((u64) msr_high << 32); | |
2725 | /* Write the default value follow host pat */ | |
2726 | vmcs_write64(GUEST_IA32_PAT, host_pat); | |
2727 | /* Keep arch.pat sync with GUEST_IA32_PAT */ | |
2728 | vmx->vcpu.arch.pat = host_pat; | |
2729 | } | |
2730 | ||
6aa8b732 AK |
2731 | for (i = 0; i < NR_VMX_MSR; ++i) { |
2732 | u32 index = vmx_msr_index[i]; | |
2733 | u32 data_low, data_high; | |
a2fa3e9f | 2734 | int j = vmx->nmsrs; |
6aa8b732 AK |
2735 | |
2736 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
2737 | continue; | |
432bd6cb AK |
2738 | if (wrmsr_safe(index, data_low, data_high) < 0) |
2739 | continue; | |
26bb0981 AK |
2740 | vmx->guest_msrs[j].index = i; |
2741 | vmx->guest_msrs[j].data = 0; | |
d5696725 | 2742 | vmx->guest_msrs[j].mask = -1ull; |
a2fa3e9f | 2743 | ++vmx->nmsrs; |
6aa8b732 | 2744 | } |
6aa8b732 | 2745 | |
1c3d14fe | 2746 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
2747 | |
2748 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
2749 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
2750 | ||
e00c8cf2 | 2751 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
4c38609a | 2752 | vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS; |
ce03e4f2 AK |
2753 | if (enable_ept) |
2754 | vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE; | |
4c38609a | 2755 | vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits); |
e00c8cf2 | 2756 | |
99e3e30a | 2757 | kvm_write_tsc(&vmx->vcpu, 0); |
f78e0e2e | 2758 | |
e00c8cf2 AK |
2759 | return 0; |
2760 | } | |
2761 | ||
2762 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) | |
2763 | { | |
2764 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
2765 | u64 msr; | |
4b9d3a04 | 2766 | int ret; |
e00c8cf2 | 2767 | |
5fdbf976 | 2768 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)); |
e00c8cf2 | 2769 | |
7ffd92c5 | 2770 | vmx->rmode.vm86_active = 0; |
e00c8cf2 | 2771 | |
3b86cd99 JK |
2772 | vmx->soft_vnmi_blocked = 0; |
2773 | ||
ad312c7c | 2774 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 2775 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 | 2776 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 2777 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
e00c8cf2 AK |
2778 | msr |= MSR_IA32_APICBASE_BSP; |
2779 | kvm_set_apic_base(&vmx->vcpu, msr); | |
2780 | ||
10ab25cd JK |
2781 | ret = fx_init(&vmx->vcpu); |
2782 | if (ret != 0) | |
2783 | goto out; | |
e00c8cf2 | 2784 | |
5706be0d | 2785 | seg_setup(VCPU_SREG_CS); |
e00c8cf2 AK |
2786 | /* |
2787 | * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode | |
2788 | * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. | |
2789 | */ | |
c5af89b6 | 2790 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) { |
e00c8cf2 AK |
2791 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
2792 | vmcs_writel(GUEST_CS_BASE, 0x000f0000); | |
2793 | } else { | |
ad312c7c ZX |
2794 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
2795 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 | 2796 | } |
e00c8cf2 AK |
2797 | |
2798 | seg_setup(VCPU_SREG_DS); | |
2799 | seg_setup(VCPU_SREG_ES); | |
2800 | seg_setup(VCPU_SREG_FS); | |
2801 | seg_setup(VCPU_SREG_GS); | |
2802 | seg_setup(VCPU_SREG_SS); | |
2803 | ||
2804 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
2805 | vmcs_writel(GUEST_TR_BASE, 0); | |
2806 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
2807 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
2808 | ||
2809 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
2810 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
2811 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
2812 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
2813 | ||
2814 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
2815 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
2816 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
2817 | ||
2818 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
c5af89b6 | 2819 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
5fdbf976 | 2820 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 2821 | else |
5fdbf976 MT |
2822 | kvm_rip_write(vcpu, 0); |
2823 | kvm_register_write(vcpu, VCPU_REGS_RSP, 0); | |
e00c8cf2 | 2824 | |
e00c8cf2 AK |
2825 | vmcs_writel(GUEST_DR7, 0x400); |
2826 | ||
2827 | vmcs_writel(GUEST_GDTR_BASE, 0); | |
2828 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
2829 | ||
2830 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
2831 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
2832 | ||
443381a8 | 2833 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); |
e00c8cf2 AK |
2834 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
2835 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
2836 | ||
e00c8cf2 AK |
2837 | /* Special registers */ |
2838 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
2839 | ||
2840 | setup_msrs(vmx); | |
2841 | ||
6aa8b732 AK |
2842 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
2843 | ||
f78e0e2e SY |
2844 | if (cpu_has_vmx_tpr_shadow()) { |
2845 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
2846 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
2847 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
afc20184 | 2848 | __pa(vmx->vcpu.arch.apic->regs)); |
f78e0e2e SY |
2849 | vmcs_write32(TPR_THRESHOLD, 0); |
2850 | } | |
2851 | ||
2852 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
2853 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 2854 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 2855 | |
2384d2b3 SY |
2856 | if (vmx->vpid != 0) |
2857 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
2858 | ||
fa40052c | 2859 | vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
4d4ec087 | 2860 | vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */ |
8b9cf98c | 2861 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 2862 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
2863 | vmx_fpu_activate(&vmx->vcpu); |
2864 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 2865 | |
b9d762fa | 2866 | vpid_sync_context(vmx); |
2384d2b3 | 2867 | |
3200f405 | 2868 | ret = 0; |
6aa8b732 | 2869 | |
a89a8fb9 MG |
2870 | /* HACK: Don't enable emulation on guest boot/reset */ |
2871 | vmx->emulation_required = 0; | |
2872 | ||
6aa8b732 AK |
2873 | out: |
2874 | return ret; | |
2875 | } | |
2876 | ||
3b86cd99 JK |
2877 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
2878 | { | |
2879 | u32 cpu_based_vm_exec_control; | |
2880 | ||
2881 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
2882 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
2883 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2884 | } | |
2885 | ||
2886 | static void enable_nmi_window(struct kvm_vcpu *vcpu) | |
2887 | { | |
2888 | u32 cpu_based_vm_exec_control; | |
2889 | ||
2890 | if (!cpu_has_virtual_nmis()) { | |
2891 | enable_irq_window(vcpu); | |
2892 | return; | |
2893 | } | |
2894 | ||
30bd0c4c AK |
2895 | if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) { |
2896 | enable_irq_window(vcpu); | |
2897 | return; | |
2898 | } | |
3b86cd99 JK |
2899 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
2900 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; | |
2901 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2902 | } | |
2903 | ||
66fd3f7f | 2904 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 2905 | { |
9c8cba37 | 2906 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
2907 | uint32_t intr; |
2908 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 2909 | |
229456fc | 2910 | trace_kvm_inj_virq(irq); |
2714d1d3 | 2911 | |
fa89a817 | 2912 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 2913 | if (vmx->rmode.vm86_active) { |
a92601bb MG |
2914 | if (kvm_inject_realmode_interrupt(vcpu, irq) != EMULATE_DONE) |
2915 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
85f455f7 ED |
2916 | return; |
2917 | } | |
66fd3f7f GN |
2918 | intr = irq | INTR_INFO_VALID_MASK; |
2919 | if (vcpu->arch.interrupt.soft) { | |
2920 | intr |= INTR_TYPE_SOFT_INTR; | |
2921 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
2922 | vmx->vcpu.arch.event_exit_inst_len); | |
2923 | } else | |
2924 | intr |= INTR_TYPE_EXT_INTR; | |
2925 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
443381a8 | 2926 | vmx_clear_hlt(vcpu); |
85f455f7 ED |
2927 | } |
2928 | ||
f08864b4 SY |
2929 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
2930 | { | |
66a5a347 JK |
2931 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2932 | ||
3b86cd99 JK |
2933 | if (!cpu_has_virtual_nmis()) { |
2934 | /* | |
2935 | * Tracking the NMI-blocked state in software is built upon | |
2936 | * finding the next open IRQ window. This, in turn, depends on | |
2937 | * well-behaving guests: They have to keep IRQs disabled at | |
2938 | * least as long as the NMI handler runs. Otherwise we may | |
2939 | * cause NMI nesting, maybe breaking the guest. But as this is | |
2940 | * highly unlikely, we can live with the residual risk. | |
2941 | */ | |
2942 | vmx->soft_vnmi_blocked = 1; | |
2943 | vmx->vnmi_blocked_time = 0; | |
2944 | } | |
2945 | ||
487b391d | 2946 | ++vcpu->stat.nmi_injections; |
7ffd92c5 | 2947 | if (vmx->rmode.vm86_active) { |
a92601bb MG |
2948 | if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR) != EMULATE_DONE) |
2949 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
66a5a347 JK |
2950 | return; |
2951 | } | |
f08864b4 SY |
2952 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
2953 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
443381a8 | 2954 | vmx_clear_hlt(vcpu); |
f08864b4 SY |
2955 | } |
2956 | ||
c4282df9 | 2957 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
33f089ca | 2958 | { |
3b86cd99 | 2959 | if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked) |
c4282df9 | 2960 | return 0; |
33f089ca | 2961 | |
c4282df9 | 2962 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
30bd0c4c AK |
2963 | (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI |
2964 | | GUEST_INTR_STATE_NMI)); | |
33f089ca JK |
2965 | } |
2966 | ||
3cfc3092 JK |
2967 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu) |
2968 | { | |
2969 | if (!cpu_has_virtual_nmis()) | |
2970 | return to_vmx(vcpu)->soft_vnmi_blocked; | |
c332c83a | 2971 | return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI; |
3cfc3092 JK |
2972 | } |
2973 | ||
2974 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
2975 | { | |
2976 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
2977 | ||
2978 | if (!cpu_has_virtual_nmis()) { | |
2979 | if (vmx->soft_vnmi_blocked != masked) { | |
2980 | vmx->soft_vnmi_blocked = masked; | |
2981 | vmx->vnmi_blocked_time = 0; | |
2982 | } | |
2983 | } else { | |
2984 | if (masked) | |
2985 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
2986 | GUEST_INTR_STATE_NMI); | |
2987 | else | |
2988 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, | |
2989 | GUEST_INTR_STATE_NMI); | |
2990 | } | |
2991 | } | |
2992 | ||
78646121 GN |
2993 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
2994 | { | |
c4282df9 GN |
2995 | return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
2996 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & | |
2997 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
2998 | } |
2999 | ||
cbc94022 IE |
3000 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
3001 | { | |
3002 | int ret; | |
3003 | struct kvm_userspace_memory_region tss_mem = { | |
6fe63979 | 3004 | .slot = TSS_PRIVATE_MEMSLOT, |
cbc94022 IE |
3005 | .guest_phys_addr = addr, |
3006 | .memory_size = PAGE_SIZE * 3, | |
3007 | .flags = 0, | |
3008 | }; | |
3009 | ||
3010 | ret = kvm_set_memory_region(kvm, &tss_mem, 0); | |
3011 | if (ret) | |
3012 | return ret; | |
bfc6d222 | 3013 | kvm->arch.tss_addr = addr; |
93ea5388 GN |
3014 | if (!init_rmode_tss(kvm)) |
3015 | return -ENOMEM; | |
3016 | ||
cbc94022 IE |
3017 | return 0; |
3018 | } | |
3019 | ||
6aa8b732 AK |
3020 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, |
3021 | int vec, u32 err_code) | |
3022 | { | |
b3f37707 NK |
3023 | /* |
3024 | * Instruction with address size override prefix opcode 0x67 | |
3025 | * Cause the #SS fault with 0 error code in VM86 mode. | |
3026 | */ | |
3027 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) | |
51d8b661 | 3028 | if (emulate_instruction(vcpu, 0) == EMULATE_DONE) |
6aa8b732 | 3029 | return 1; |
77ab6db0 JK |
3030 | /* |
3031 | * Forward all other exceptions that are valid in real mode. | |
3032 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
3033 | * the required debugging infrastructure rework. | |
3034 | */ | |
3035 | switch (vec) { | |
77ab6db0 | 3036 | case DB_VECTOR: |
d0bfb940 JK |
3037 | if (vcpu->guest_debug & |
3038 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
3039 | return 0; | |
3040 | kvm_queue_exception(vcpu, vec); | |
3041 | return 1; | |
77ab6db0 | 3042 | case BP_VECTOR: |
c573cd22 JK |
3043 | /* |
3044 | * Update instruction length as we may reinject the exception | |
3045 | * from user space while in guest debugging mode. | |
3046 | */ | |
3047 | to_vmx(vcpu)->vcpu.arch.event_exit_inst_len = | |
3048 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
d0bfb940 JK |
3049 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
3050 | return 0; | |
3051 | /* fall through */ | |
3052 | case DE_VECTOR: | |
77ab6db0 JK |
3053 | case OF_VECTOR: |
3054 | case BR_VECTOR: | |
3055 | case UD_VECTOR: | |
3056 | case DF_VECTOR: | |
3057 | case SS_VECTOR: | |
3058 | case GP_VECTOR: | |
3059 | case MF_VECTOR: | |
3060 | kvm_queue_exception(vcpu, vec); | |
3061 | return 1; | |
3062 | } | |
6aa8b732 AK |
3063 | return 0; |
3064 | } | |
3065 | ||
a0861c02 AK |
3066 | /* |
3067 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
3068 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
3069 | * We pass a fake environment to the machine check handler because we want | |
3070 | * the guest to be always treated like user space, no matter what context | |
3071 | * it used internally. | |
3072 | */ | |
3073 | static void kvm_machine_check(void) | |
3074 | { | |
3075 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
3076 | struct pt_regs regs = { | |
3077 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
3078 | .flags = X86_EFLAGS_IF, | |
3079 | }; | |
3080 | ||
3081 | do_machine_check(®s, 0); | |
3082 | #endif | |
3083 | } | |
3084 | ||
851ba692 | 3085 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
3086 | { |
3087 | /* already handled by vcpu_run */ | |
3088 | return 1; | |
3089 | } | |
3090 | ||
851ba692 | 3091 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 3092 | { |
1155f76a | 3093 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 3094 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 3095 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 3096 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
3097 | u32 vect_info; |
3098 | enum emulation_result er; | |
3099 | ||
1155f76a | 3100 | vect_info = vmx->idt_vectoring_info; |
6aa8b732 AK |
3101 | intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
3102 | ||
a0861c02 | 3103 | if (is_machine_check(intr_info)) |
851ba692 | 3104 | return handle_machine_check(vcpu); |
a0861c02 | 3105 | |
6aa8b732 | 3106 | if ((vect_info & VECTORING_INFO_VALID_MASK) && |
65ac7264 AK |
3107 | !is_page_fault(intr_info)) { |
3108 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3109 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; | |
3110 | vcpu->run->internal.ndata = 2; | |
3111 | vcpu->run->internal.data[0] = vect_info; | |
3112 | vcpu->run->internal.data[1] = intr_info; | |
3113 | return 0; | |
3114 | } | |
6aa8b732 | 3115 | |
e4a41889 | 3116 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) |
1b6269db | 3117 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc AL |
3118 | |
3119 | if (is_no_device(intr_info)) { | |
5fd86fcf | 3120 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
3121 | return 1; |
3122 | } | |
3123 | ||
7aa81cc0 | 3124 | if (is_invalid_opcode(intr_info)) { |
51d8b661 | 3125 | er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD); |
7aa81cc0 | 3126 | if (er != EMULATE_DONE) |
7ee5d940 | 3127 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
3128 | return 1; |
3129 | } | |
3130 | ||
6aa8b732 | 3131 | error_code = 0; |
5fdbf976 | 3132 | rip = kvm_rip_read(vcpu); |
2e11384c | 3133 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 AK |
3134 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
3135 | if (is_page_fault(intr_info)) { | |
1439442c | 3136 | /* EPT won't cause page fault directly */ |
089d034e | 3137 | if (enable_ept) |
1439442c | 3138 | BUG(); |
6aa8b732 | 3139 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
229456fc MT |
3140 | trace_kvm_page_fault(cr2, error_code); |
3141 | ||
3298b75c | 3142 | if (kvm_event_needs_reinjection(vcpu)) |
577bdc49 | 3143 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
dc25e89e | 3144 | return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0); |
6aa8b732 AK |
3145 | } |
3146 | ||
7ffd92c5 | 3147 | if (vmx->rmode.vm86_active && |
6aa8b732 | 3148 | handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK, |
72d6e5a0 | 3149 | error_code)) { |
ad312c7c ZX |
3150 | if (vcpu->arch.halt_request) { |
3151 | vcpu->arch.halt_request = 0; | |
72d6e5a0 AK |
3152 | return kvm_emulate_halt(vcpu); |
3153 | } | |
6aa8b732 | 3154 | return 1; |
72d6e5a0 | 3155 | } |
6aa8b732 | 3156 | |
d0bfb940 | 3157 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
42dbaa5a JK |
3158 | switch (ex_no) { |
3159 | case DB_VECTOR: | |
3160 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
3161 | if (!(vcpu->guest_debug & | |
3162 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
3163 | vcpu->arch.dr6 = dr6 | DR6_FIXED_1; | |
3164 | kvm_queue_exception(vcpu, DB_VECTOR); | |
3165 | return 1; | |
3166 | } | |
3167 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
3168 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
3169 | /* fall through */ | |
3170 | case BP_VECTOR: | |
c573cd22 JK |
3171 | /* |
3172 | * Update instruction length as we may reinject #BP from | |
3173 | * user space while in guest debugging mode. Reading it for | |
3174 | * #DB as well causes no harm, it is not used in that case. | |
3175 | */ | |
3176 | vmx->vcpu.arch.event_exit_inst_len = | |
3177 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6aa8b732 | 3178 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
d0bfb940 JK |
3179 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
3180 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
3181 | break; |
3182 | default: | |
d0bfb940 JK |
3183 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
3184 | kvm_run->ex.exception = ex_no; | |
3185 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 3186 | break; |
6aa8b732 | 3187 | } |
6aa8b732 AK |
3188 | return 0; |
3189 | } | |
3190 | ||
851ba692 | 3191 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 3192 | { |
1165f5fe | 3193 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
3194 | return 1; |
3195 | } | |
3196 | ||
851ba692 | 3197 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 3198 | { |
851ba692 | 3199 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
988ad74f AK |
3200 | return 0; |
3201 | } | |
6aa8b732 | 3202 | |
851ba692 | 3203 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 3204 | { |
bfdaab09 | 3205 | unsigned long exit_qualification; |
34c33d16 | 3206 | int size, in, string; |
039576c0 | 3207 | unsigned port; |
6aa8b732 | 3208 | |
bfdaab09 | 3209 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 3210 | string = (exit_qualification & 16) != 0; |
cf8f70bf | 3211 | in = (exit_qualification & 8) != 0; |
e70669ab | 3212 | |
cf8f70bf | 3213 | ++vcpu->stat.io_exits; |
e70669ab | 3214 | |
cf8f70bf | 3215 | if (string || in) |
51d8b661 | 3216 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
e70669ab | 3217 | |
cf8f70bf GN |
3218 | port = exit_qualification >> 16; |
3219 | size = (exit_qualification & 7) + 1; | |
e93f36bc | 3220 | skip_emulated_instruction(vcpu); |
cf8f70bf GN |
3221 | |
3222 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
3223 | } |
3224 | ||
102d8325 IM |
3225 | static void |
3226 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
3227 | { | |
3228 | /* | |
3229 | * Patch in the VMCALL instruction: | |
3230 | */ | |
3231 | hypercall[0] = 0x0f; | |
3232 | hypercall[1] = 0x01; | |
3233 | hypercall[2] = 0xc1; | |
102d8325 IM |
3234 | } |
3235 | ||
851ba692 | 3236 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3237 | { |
229456fc | 3238 | unsigned long exit_qualification, val; |
6aa8b732 AK |
3239 | int cr; |
3240 | int reg; | |
49a9b07e | 3241 | int err; |
6aa8b732 | 3242 | |
bfdaab09 | 3243 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
3244 | cr = exit_qualification & 15; |
3245 | reg = (exit_qualification >> 8) & 15; | |
3246 | switch ((exit_qualification >> 4) & 3) { | |
3247 | case 0: /* mov to cr */ | |
229456fc MT |
3248 | val = kvm_register_read(vcpu, reg); |
3249 | trace_kvm_cr_write(cr, val); | |
6aa8b732 AK |
3250 | switch (cr) { |
3251 | case 0: | |
49a9b07e | 3252 | err = kvm_set_cr0(vcpu, val); |
db8fcefa | 3253 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
3254 | return 1; |
3255 | case 3: | |
2390218b | 3256 | err = kvm_set_cr3(vcpu, val); |
db8fcefa | 3257 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
3258 | return 1; |
3259 | case 4: | |
a83b29c6 | 3260 | err = kvm_set_cr4(vcpu, val); |
db8fcefa | 3261 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 3262 | return 1; |
0a5fff19 GN |
3263 | case 8: { |
3264 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
3265 | u8 cr8 = kvm_register_read(vcpu, reg); | |
eea1cff9 | 3266 | err = kvm_set_cr8(vcpu, cr8); |
db8fcefa | 3267 | kvm_complete_insn_gp(vcpu, err); |
0a5fff19 GN |
3268 | if (irqchip_in_kernel(vcpu->kvm)) |
3269 | return 1; | |
3270 | if (cr8_prev <= cr8) | |
3271 | return 1; | |
851ba692 | 3272 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
3273 | return 0; |
3274 | } | |
6aa8b732 AK |
3275 | }; |
3276 | break; | |
25c4c276 | 3277 | case 2: /* clts */ |
edcafe3c | 3278 | vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); |
4d4ec087 | 3279 | trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); |
25c4c276 | 3280 | skip_emulated_instruction(vcpu); |
6b52d186 | 3281 | vmx_fpu_activate(vcpu); |
25c4c276 | 3282 | return 1; |
6aa8b732 AK |
3283 | case 1: /*mov from cr*/ |
3284 | switch (cr) { | |
3285 | case 3: | |
9f8fe504 AK |
3286 | val = kvm_read_cr3(vcpu); |
3287 | kvm_register_write(vcpu, reg, val); | |
3288 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
3289 | skip_emulated_instruction(vcpu); |
3290 | return 1; | |
3291 | case 8: | |
229456fc MT |
3292 | val = kvm_get_cr8(vcpu); |
3293 | kvm_register_write(vcpu, reg, val); | |
3294 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
3295 | skip_emulated_instruction(vcpu); |
3296 | return 1; | |
3297 | } | |
3298 | break; | |
3299 | case 3: /* lmsw */ | |
a1f83a74 | 3300 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
4d4ec087 | 3301 | trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val); |
a1f83a74 | 3302 | kvm_lmsw(vcpu, val); |
6aa8b732 AK |
3303 | |
3304 | skip_emulated_instruction(vcpu); | |
3305 | return 1; | |
3306 | default: | |
3307 | break; | |
3308 | } | |
851ba692 | 3309 | vcpu->run->exit_reason = 0; |
f0242478 | 3310 | pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
3311 | (int)(exit_qualification >> 4) & 3, cr); |
3312 | return 0; | |
3313 | } | |
3314 | ||
851ba692 | 3315 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3316 | { |
bfdaab09 | 3317 | unsigned long exit_qualification; |
6aa8b732 AK |
3318 | int dr, reg; |
3319 | ||
f2483415 | 3320 | /* Do not handle if the CPL > 0, will trigger GP on re-entry */ |
0a79b009 AK |
3321 | if (!kvm_require_cpl(vcpu, 0)) |
3322 | return 1; | |
42dbaa5a JK |
3323 | dr = vmcs_readl(GUEST_DR7); |
3324 | if (dr & DR7_GD) { | |
3325 | /* | |
3326 | * As the vm-exit takes precedence over the debug trap, we | |
3327 | * need to emulate the latter, either for the host or the | |
3328 | * guest debugging itself. | |
3329 | */ | |
3330 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 AK |
3331 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
3332 | vcpu->run->debug.arch.dr7 = dr; | |
3333 | vcpu->run->debug.arch.pc = | |
42dbaa5a JK |
3334 | vmcs_readl(GUEST_CS_BASE) + |
3335 | vmcs_readl(GUEST_RIP); | |
851ba692 AK |
3336 | vcpu->run->debug.arch.exception = DB_VECTOR; |
3337 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
3338 | return 0; |
3339 | } else { | |
3340 | vcpu->arch.dr7 &= ~DR7_GD; | |
3341 | vcpu->arch.dr6 |= DR6_BD; | |
3342 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
3343 | kvm_queue_exception(vcpu, DB_VECTOR); | |
3344 | return 1; | |
3345 | } | |
3346 | } | |
3347 | ||
bfdaab09 | 3348 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
42dbaa5a JK |
3349 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; |
3350 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); | |
3351 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
020df079 GN |
3352 | unsigned long val; |
3353 | if (!kvm_get_dr(vcpu, dr, &val)) | |
3354 | kvm_register_write(vcpu, reg, val); | |
3355 | } else | |
3356 | kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]); | |
6aa8b732 AK |
3357 | skip_emulated_instruction(vcpu); |
3358 | return 1; | |
3359 | } | |
3360 | ||
020df079 GN |
3361 | static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) |
3362 | { | |
3363 | vmcs_writel(GUEST_DR7, val); | |
3364 | } | |
3365 | ||
851ba692 | 3366 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 3367 | { |
06465c5a AK |
3368 | kvm_emulate_cpuid(vcpu); |
3369 | return 1; | |
6aa8b732 AK |
3370 | } |
3371 | ||
851ba692 | 3372 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3373 | { |
ad312c7c | 3374 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
3375 | u64 data; |
3376 | ||
3377 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
59200273 | 3378 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 3379 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
3380 | return 1; |
3381 | } | |
3382 | ||
229456fc | 3383 | trace_kvm_msr_read(ecx, data); |
2714d1d3 | 3384 | |
6aa8b732 | 3385 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
ad312c7c ZX |
3386 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
3387 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
3388 | skip_emulated_instruction(vcpu); |
3389 | return 1; | |
3390 | } | |
3391 | ||
851ba692 | 3392 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 3393 | { |
ad312c7c ZX |
3394 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
3395 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
3396 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 AK |
3397 | |
3398 | if (vmx_set_msr(vcpu, ecx, data) != 0) { | |
59200273 | 3399 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 3400 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
3401 | return 1; |
3402 | } | |
3403 | ||
59200273 | 3404 | trace_kvm_msr_write(ecx, data); |
6aa8b732 AK |
3405 | skip_emulated_instruction(vcpu); |
3406 | return 1; | |
3407 | } | |
3408 | ||
851ba692 | 3409 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c | 3410 | { |
3842d135 | 3411 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6e5d865c YS |
3412 | return 1; |
3413 | } | |
3414 | ||
851ba692 | 3415 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 3416 | { |
85f455f7 ED |
3417 | u32 cpu_based_vm_exec_control; |
3418 | ||
3419 | /* clear pending irq */ | |
3420 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3421 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
3422 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 | 3423 | |
3842d135 AK |
3424 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3425 | ||
a26bf12a | 3426 | ++vcpu->stat.irq_window_exits; |
2714d1d3 | 3427 | |
c1150d8c DL |
3428 | /* |
3429 | * If the user space waits to inject interrupts, exit as soon as | |
3430 | * possible | |
3431 | */ | |
8061823a | 3432 | if (!irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 3433 | vcpu->run->request_interrupt_window && |
8061823a | 3434 | !kvm_cpu_has_interrupt(vcpu)) { |
851ba692 | 3435 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
c1150d8c DL |
3436 | return 0; |
3437 | } | |
6aa8b732 AK |
3438 | return 1; |
3439 | } | |
3440 | ||
851ba692 | 3441 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 AK |
3442 | { |
3443 | skip_emulated_instruction(vcpu); | |
d3bef15f | 3444 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
3445 | } |
3446 | ||
851ba692 | 3447 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 3448 | { |
510043da | 3449 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
3450 | kvm_emulate_hypercall(vcpu); |
3451 | return 1; | |
c21415e8 IM |
3452 | } |
3453 | ||
851ba692 | 3454 | static int handle_vmx_insn(struct kvm_vcpu *vcpu) |
e3c7cb6a AK |
3455 | { |
3456 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3457 | return 1; | |
3458 | } | |
3459 | ||
ec25d5e6 GN |
3460 | static int handle_invd(struct kvm_vcpu *vcpu) |
3461 | { | |
51d8b661 | 3462 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
ec25d5e6 GN |
3463 | } |
3464 | ||
851ba692 | 3465 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 3466 | { |
f9c617f6 | 3467 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
3468 | |
3469 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
3470 | skip_emulated_instruction(vcpu); | |
3471 | return 1; | |
3472 | } | |
3473 | ||
851ba692 | 3474 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 ED |
3475 | { |
3476 | skip_emulated_instruction(vcpu); | |
f5f48ee1 | 3477 | kvm_emulate_wbinvd(vcpu); |
e5edaa01 ED |
3478 | return 1; |
3479 | } | |
3480 | ||
2acf923e DC |
3481 | static int handle_xsetbv(struct kvm_vcpu *vcpu) |
3482 | { | |
3483 | u64 new_bv = kvm_read_edx_eax(vcpu); | |
3484 | u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3485 | ||
3486 | if (kvm_set_xcr(vcpu, index, new_bv) == 0) | |
3487 | skip_emulated_instruction(vcpu); | |
3488 | return 1; | |
3489 | } | |
3490 | ||
851ba692 | 3491 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 3492 | { |
51d8b661 | 3493 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
f78e0e2e SY |
3494 | } |
3495 | ||
851ba692 | 3496 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 3497 | { |
60637aac | 3498 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 | 3499 | unsigned long exit_qualification; |
e269fb21 JK |
3500 | bool has_error_code = false; |
3501 | u32 error_code = 0; | |
37817f29 | 3502 | u16 tss_selector; |
64a7ec06 GN |
3503 | int reason, type, idt_v; |
3504 | ||
3505 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
3506 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); | |
37817f29 IE |
3507 | |
3508 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
3509 | ||
3510 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
3511 | if (reason == TASK_SWITCH_GATE && idt_v) { |
3512 | switch (type) { | |
3513 | case INTR_TYPE_NMI_INTR: | |
3514 | vcpu->arch.nmi_injected = false; | |
3515 | if (cpu_has_virtual_nmis()) | |
3516 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
3517 | GUEST_INTR_STATE_NMI); | |
3518 | break; | |
3519 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 3520 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
3521 | kvm_clear_interrupt_queue(vcpu); |
3522 | break; | |
3523 | case INTR_TYPE_HARD_EXCEPTION: | |
e269fb21 JK |
3524 | if (vmx->idt_vectoring_info & |
3525 | VECTORING_INFO_DELIVER_CODE_MASK) { | |
3526 | has_error_code = true; | |
3527 | error_code = | |
3528 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
3529 | } | |
3530 | /* fall through */ | |
64a7ec06 GN |
3531 | case INTR_TYPE_SOFT_EXCEPTION: |
3532 | kvm_clear_exception_queue(vcpu); | |
3533 | break; | |
3534 | default: | |
3535 | break; | |
3536 | } | |
60637aac | 3537 | } |
37817f29 IE |
3538 | tss_selector = exit_qualification; |
3539 | ||
64a7ec06 GN |
3540 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
3541 | type != INTR_TYPE_EXT_INTR && | |
3542 | type != INTR_TYPE_NMI_INTR)) | |
3543 | skip_emulated_instruction(vcpu); | |
3544 | ||
acb54517 GN |
3545 | if (kvm_task_switch(vcpu, tss_selector, reason, |
3546 | has_error_code, error_code) == EMULATE_FAIL) { | |
3547 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
3548 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
3549 | vcpu->run->internal.ndata = 0; | |
42dbaa5a | 3550 | return 0; |
acb54517 | 3551 | } |
42dbaa5a JK |
3552 | |
3553 | /* clear all local breakpoint enable flags */ | |
3554 | vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55); | |
3555 | ||
3556 | /* | |
3557 | * TODO: What about debug traps on tss switch? | |
3558 | * Are we supposed to inject them and update dr6? | |
3559 | */ | |
3560 | ||
3561 | return 1; | |
37817f29 IE |
3562 | } |
3563 | ||
851ba692 | 3564 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 3565 | { |
f9c617f6 | 3566 | unsigned long exit_qualification; |
1439442c | 3567 | gpa_t gpa; |
1439442c | 3568 | int gla_validity; |
1439442c | 3569 | |
f9c617f6 | 3570 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c SY |
3571 | |
3572 | if (exit_qualification & (1 << 6)) { | |
3573 | printk(KERN_ERR "EPT: GPA exceeds GAW!\n"); | |
7f582ab6 | 3574 | return -EINVAL; |
1439442c SY |
3575 | } |
3576 | ||
3577 | gla_validity = (exit_qualification >> 7) & 0x3; | |
3578 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
3579 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
3580 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
3581 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
f9c617f6 | 3582 | vmcs_readl(GUEST_LINEAR_ADDRESS)); |
1439442c SY |
3583 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
3584 | (long unsigned int)exit_qualification); | |
851ba692 AK |
3585 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3586 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION; | |
596ae895 | 3587 | return 0; |
1439442c SY |
3588 | } |
3589 | ||
3590 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
229456fc | 3591 | trace_kvm_page_fault(gpa, exit_qualification); |
dc25e89e | 3592 | return kvm_mmu_page_fault(vcpu, gpa, exit_qualification & 0x3, NULL, 0); |
1439442c SY |
3593 | } |
3594 | ||
68f89400 MT |
3595 | static u64 ept_rsvd_mask(u64 spte, int level) |
3596 | { | |
3597 | int i; | |
3598 | u64 mask = 0; | |
3599 | ||
3600 | for (i = 51; i > boot_cpu_data.x86_phys_bits; i--) | |
3601 | mask |= (1ULL << i); | |
3602 | ||
3603 | if (level > 2) | |
3604 | /* bits 7:3 reserved */ | |
3605 | mask |= 0xf8; | |
3606 | else if (level == 2) { | |
3607 | if (spte & (1ULL << 7)) | |
3608 | /* 2MB ref, bits 20:12 reserved */ | |
3609 | mask |= 0x1ff000; | |
3610 | else | |
3611 | /* bits 6:3 reserved */ | |
3612 | mask |= 0x78; | |
3613 | } | |
3614 | ||
3615 | return mask; | |
3616 | } | |
3617 | ||
3618 | static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte, | |
3619 | int level) | |
3620 | { | |
3621 | printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level); | |
3622 | ||
3623 | /* 010b (write-only) */ | |
3624 | WARN_ON((spte & 0x7) == 0x2); | |
3625 | ||
3626 | /* 110b (write/execute) */ | |
3627 | WARN_ON((spte & 0x7) == 0x6); | |
3628 | ||
3629 | /* 100b (execute-only) and value not supported by logical processor */ | |
3630 | if (!cpu_has_vmx_ept_execute_only()) | |
3631 | WARN_ON((spte & 0x7) == 0x4); | |
3632 | ||
3633 | /* not 000b */ | |
3634 | if ((spte & 0x7)) { | |
3635 | u64 rsvd_bits = spte & ept_rsvd_mask(spte, level); | |
3636 | ||
3637 | if (rsvd_bits != 0) { | |
3638 | printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n", | |
3639 | __func__, rsvd_bits); | |
3640 | WARN_ON(1); | |
3641 | } | |
3642 | ||
3643 | if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) { | |
3644 | u64 ept_mem_type = (spte & 0x38) >> 3; | |
3645 | ||
3646 | if (ept_mem_type == 2 || ept_mem_type == 3 || | |
3647 | ept_mem_type == 7) { | |
3648 | printk(KERN_ERR "%s: ept_mem_type=0x%llx\n", | |
3649 | __func__, ept_mem_type); | |
3650 | WARN_ON(1); | |
3651 | } | |
3652 | } | |
3653 | } | |
3654 | } | |
3655 | ||
851ba692 | 3656 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 MT |
3657 | { |
3658 | u64 sptes[4]; | |
3659 | int nr_sptes, i; | |
3660 | gpa_t gpa; | |
3661 | ||
3662 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
3663 | ||
3664 | printk(KERN_ERR "EPT: Misconfiguration.\n"); | |
3665 | printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa); | |
3666 | ||
3667 | nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes); | |
3668 | ||
3669 | for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i) | |
3670 | ept_misconfig_inspect_spte(vcpu, sptes[i-1], i); | |
3671 | ||
851ba692 AK |
3672 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3673 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG; | |
68f89400 MT |
3674 | |
3675 | return 0; | |
3676 | } | |
3677 | ||
851ba692 | 3678 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 SY |
3679 | { |
3680 | u32 cpu_based_vm_exec_control; | |
3681 | ||
3682 | /* clear pending NMI */ | |
3683 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3684 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
3685 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
3686 | ++vcpu->stat.nmi_window_exits; | |
3842d135 | 3687 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f08864b4 SY |
3688 | |
3689 | return 1; | |
3690 | } | |
3691 | ||
80ced186 | 3692 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 3693 | { |
8b3079a5 AK |
3694 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3695 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 3696 | int ret = 1; |
49e9d557 AK |
3697 | u32 cpu_exec_ctrl; |
3698 | bool intr_window_requested; | |
3699 | ||
3700 | cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
3701 | intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; | |
ea953ef0 MG |
3702 | |
3703 | while (!guest_state_valid(vcpu)) { | |
49e9d557 AK |
3704 | if (intr_window_requested |
3705 | && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF)) | |
3706 | return handle_interrupt_window(&vmx->vcpu); | |
3707 | ||
51d8b661 | 3708 | err = emulate_instruction(vcpu, 0); |
ea953ef0 | 3709 | |
80ced186 MG |
3710 | if (err == EMULATE_DO_MMIO) { |
3711 | ret = 0; | |
3712 | goto out; | |
3713 | } | |
1d5a4d9b | 3714 | |
6d77dbfc GN |
3715 | if (err != EMULATE_DONE) |
3716 | return 0; | |
ea953ef0 MG |
3717 | |
3718 | if (signal_pending(current)) | |
80ced186 | 3719 | goto out; |
ea953ef0 MG |
3720 | if (need_resched()) |
3721 | schedule(); | |
3722 | } | |
3723 | ||
80ced186 MG |
3724 | vmx->emulation_required = 0; |
3725 | out: | |
3726 | return ret; | |
ea953ef0 MG |
3727 | } |
3728 | ||
4b8d54f9 ZE |
3729 | /* |
3730 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
3731 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
3732 | */ | |
9fb41ba8 | 3733 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 ZE |
3734 | { |
3735 | skip_emulated_instruction(vcpu); | |
3736 | kvm_vcpu_on_spin(vcpu); | |
3737 | ||
3738 | return 1; | |
3739 | } | |
3740 | ||
59708670 SY |
3741 | static int handle_invalid_op(struct kvm_vcpu *vcpu) |
3742 | { | |
3743 | kvm_queue_exception(vcpu, UD_VECTOR); | |
3744 | return 1; | |
3745 | } | |
3746 | ||
6aa8b732 AK |
3747 | /* |
3748 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
3749 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
3750 | * to be done to userspace and return 0. | |
3751 | */ | |
851ba692 | 3752 | static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
3753 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
3754 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 3755 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 3756 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 3757 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
3758 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
3759 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
3760 | [EXIT_REASON_CPUID] = handle_cpuid, | |
3761 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
3762 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
3763 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
3764 | [EXIT_REASON_HLT] = handle_halt, | |
ec25d5e6 | 3765 | [EXIT_REASON_INVD] = handle_invd, |
a7052897 | 3766 | [EXIT_REASON_INVLPG] = handle_invlpg, |
c21415e8 | 3767 | [EXIT_REASON_VMCALL] = handle_vmcall, |
e3c7cb6a AK |
3768 | [EXIT_REASON_VMCLEAR] = handle_vmx_insn, |
3769 | [EXIT_REASON_VMLAUNCH] = handle_vmx_insn, | |
3770 | [EXIT_REASON_VMPTRLD] = handle_vmx_insn, | |
3771 | [EXIT_REASON_VMPTRST] = handle_vmx_insn, | |
3772 | [EXIT_REASON_VMREAD] = handle_vmx_insn, | |
3773 | [EXIT_REASON_VMRESUME] = handle_vmx_insn, | |
3774 | [EXIT_REASON_VMWRITE] = handle_vmx_insn, | |
3775 | [EXIT_REASON_VMOFF] = handle_vmx_insn, | |
3776 | [EXIT_REASON_VMON] = handle_vmx_insn, | |
f78e0e2e SY |
3777 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
3778 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
e5edaa01 | 3779 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
2acf923e | 3780 | [EXIT_REASON_XSETBV] = handle_xsetbv, |
37817f29 | 3781 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 3782 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
68f89400 MT |
3783 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
3784 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 3785 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
59708670 SY |
3786 | [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op, |
3787 | [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op, | |
6aa8b732 AK |
3788 | }; |
3789 | ||
3790 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 3791 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 | 3792 | |
586f9607 AK |
3793 | static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
3794 | { | |
3795 | *info1 = vmcs_readl(EXIT_QUALIFICATION); | |
3796 | *info2 = vmcs_read32(VM_EXIT_INTR_INFO); | |
3797 | } | |
3798 | ||
6aa8b732 AK |
3799 | /* |
3800 | * The guest has exited. See if we can fix it or if we need userspace | |
3801 | * assistance. | |
3802 | */ | |
851ba692 | 3803 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 3804 | { |
29bd8a78 | 3805 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 3806 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 3807 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 3808 | |
aa17911e | 3809 | trace_kvm_exit(exit_reason, vcpu, KVM_ISA_VMX); |
2714d1d3 | 3810 | |
80ced186 MG |
3811 | /* If guest state is invalid, start emulating */ |
3812 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
3813 | return handle_invalid_guest_state(vcpu); | |
1d5a4d9b | 3814 | |
5120702e MG |
3815 | if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) { |
3816 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
3817 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
3818 | = exit_reason; | |
3819 | return 0; | |
3820 | } | |
3821 | ||
29bd8a78 | 3822 | if (unlikely(vmx->fail)) { |
851ba692 AK |
3823 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
3824 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
3825 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
3826 | return 0; | |
3827 | } | |
6aa8b732 | 3828 | |
d77c26fc | 3829 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 3830 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac JK |
3831 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
3832 | exit_reason != EXIT_REASON_TASK_SWITCH)) | |
3833 | printk(KERN_WARNING "%s: unexpected, valid vectoring info " | |
3834 | "(0x%x) and exit reason is 0x%x\n", | |
3835 | __func__, vectoring_info, exit_reason); | |
3b86cd99 JK |
3836 | |
3837 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) { | |
c4282df9 | 3838 | if (vmx_interrupt_allowed(vcpu)) { |
3b86cd99 | 3839 | vmx->soft_vnmi_blocked = 0; |
3b86cd99 | 3840 | } else if (vmx->vnmi_blocked_time > 1000000000LL && |
4531220b | 3841 | vcpu->arch.nmi_pending) { |
3b86cd99 JK |
3842 | /* |
3843 | * This CPU don't support us in finding the end of an | |
3844 | * NMI-blocked window if the guest runs with IRQs | |
3845 | * disabled. So we pull the trigger after 1 s of | |
3846 | * futile waiting, but inform the user about this. | |
3847 | */ | |
3848 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
3849 | "state on VCPU %d after 1 s timeout\n", | |
3850 | __func__, vcpu->vcpu_id); | |
3851 | vmx->soft_vnmi_blocked = 0; | |
3b86cd99 | 3852 | } |
3b86cd99 JK |
3853 | } |
3854 | ||
6aa8b732 AK |
3855 | if (exit_reason < kvm_vmx_max_exit_handlers |
3856 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 3857 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 3858 | else { |
851ba692 AK |
3859 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
3860 | vcpu->run->hw.hardware_exit_reason = exit_reason; | |
6aa8b732 AK |
3861 | } |
3862 | return 0; | |
3863 | } | |
3864 | ||
95ba8273 | 3865 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 3866 | { |
95ba8273 | 3867 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
3868 | vmcs_write32(TPR_THRESHOLD, 0); |
3869 | return; | |
3870 | } | |
3871 | ||
95ba8273 | 3872 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
3873 | } |
3874 | ||
51aa01d1 | 3875 | static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) |
cf393f75 | 3876 | { |
51aa01d1 | 3877 | u32 exit_intr_info = vmx->exit_intr_info; |
a0861c02 AK |
3878 | |
3879 | /* Handle machine checks before interrupts are enabled */ | |
3880 | if ((vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY) | |
3881 | || (vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI | |
3882 | && is_machine_check(exit_intr_info))) | |
3883 | kvm_machine_check(); | |
3884 | ||
20f65983 GN |
3885 | /* We need to handle NMIs before interrupts are enabled */ |
3886 | if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && | |
ff9d07a0 ZY |
3887 | (exit_intr_info & INTR_INFO_VALID_MASK)) { |
3888 | kvm_before_handle_nmi(&vmx->vcpu); | |
20f65983 | 3889 | asm("int $2"); |
ff9d07a0 ZY |
3890 | kvm_after_handle_nmi(&vmx->vcpu); |
3891 | } | |
51aa01d1 | 3892 | } |
20f65983 | 3893 | |
51aa01d1 AK |
3894 | static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) |
3895 | { | |
3896 | u32 exit_intr_info = vmx->exit_intr_info; | |
3897 | bool unblock_nmi; | |
3898 | u8 vector; | |
3899 | bool idtv_info_valid; | |
3900 | ||
3901 | idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
20f65983 | 3902 | |
cf393f75 AK |
3903 | if (cpu_has_virtual_nmis()) { |
3904 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; | |
3905 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
3906 | /* | |
7b4a25cb | 3907 | * SDM 3: 27.7.1.2 (September 2008) |
cf393f75 AK |
3908 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
3909 | * a guest IRET fault. | |
7b4a25cb GN |
3910 | * SDM 3: 23.2.2 (September 2008) |
3911 | * Bit 12 is undefined in any of the following cases: | |
3912 | * If the VM exit sets the valid bit in the IDT-vectoring | |
3913 | * information field. | |
3914 | * If the VM exit is due to a double fault. | |
cf393f75 | 3915 | */ |
7b4a25cb GN |
3916 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && |
3917 | vector != DF_VECTOR && !idtv_info_valid) | |
cf393f75 AK |
3918 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, |
3919 | GUEST_INTR_STATE_NMI); | |
3b86cd99 JK |
3920 | } else if (unlikely(vmx->soft_vnmi_blocked)) |
3921 | vmx->vnmi_blocked_time += | |
3922 | ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time)); | |
51aa01d1 AK |
3923 | } |
3924 | ||
83422e17 AK |
3925 | static void __vmx_complete_interrupts(struct vcpu_vmx *vmx, |
3926 | u32 idt_vectoring_info, | |
3927 | int instr_len_field, | |
3928 | int error_code_field) | |
51aa01d1 | 3929 | { |
51aa01d1 AK |
3930 | u8 vector; |
3931 | int type; | |
3932 | bool idtv_info_valid; | |
3933 | ||
3934 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
668f612f | 3935 | |
37b96e98 GN |
3936 | vmx->vcpu.arch.nmi_injected = false; |
3937 | kvm_clear_exception_queue(&vmx->vcpu); | |
3938 | kvm_clear_interrupt_queue(&vmx->vcpu); | |
3939 | ||
3940 | if (!idtv_info_valid) | |
3941 | return; | |
3942 | ||
3842d135 AK |
3943 | kvm_make_request(KVM_REQ_EVENT, &vmx->vcpu); |
3944 | ||
668f612f AK |
3945 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
3946 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 3947 | |
64a7ec06 | 3948 | switch (type) { |
37b96e98 GN |
3949 | case INTR_TYPE_NMI_INTR: |
3950 | vmx->vcpu.arch.nmi_injected = true; | |
668f612f | 3951 | /* |
7b4a25cb | 3952 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
3953 | * Clear bit "block by NMI" before VM entry if a NMI |
3954 | * delivery faulted. | |
668f612f | 3955 | */ |
37b96e98 GN |
3956 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, |
3957 | GUEST_INTR_STATE_NMI); | |
3958 | break; | |
37b96e98 | 3959 | case INTR_TYPE_SOFT_EXCEPTION: |
66fd3f7f | 3960 | vmx->vcpu.arch.event_exit_inst_len = |
83422e17 | 3961 | vmcs_read32(instr_len_field); |
66fd3f7f GN |
3962 | /* fall through */ |
3963 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 3964 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
83422e17 | 3965 | u32 err = vmcs_read32(error_code_field); |
37b96e98 | 3966 | kvm_queue_exception_e(&vmx->vcpu, vector, err); |
35920a35 AK |
3967 | } else |
3968 | kvm_queue_exception(&vmx->vcpu, vector); | |
37b96e98 | 3969 | break; |
66fd3f7f GN |
3970 | case INTR_TYPE_SOFT_INTR: |
3971 | vmx->vcpu.arch.event_exit_inst_len = | |
83422e17 | 3972 | vmcs_read32(instr_len_field); |
66fd3f7f | 3973 | /* fall through */ |
37b96e98 | 3974 | case INTR_TYPE_EXT_INTR: |
66fd3f7f GN |
3975 | kvm_queue_interrupt(&vmx->vcpu, vector, |
3976 | type == INTR_TYPE_SOFT_INTR); | |
37b96e98 GN |
3977 | break; |
3978 | default: | |
3979 | break; | |
f7d9238f | 3980 | } |
cf393f75 AK |
3981 | } |
3982 | ||
83422e17 AK |
3983 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
3984 | { | |
3985 | __vmx_complete_interrupts(vmx, vmx->idt_vectoring_info, | |
3986 | VM_EXIT_INSTRUCTION_LEN, | |
3987 | IDT_VECTORING_ERROR_CODE); | |
3988 | } | |
3989 | ||
b463a6f7 AK |
3990 | static void vmx_cancel_injection(struct kvm_vcpu *vcpu) |
3991 | { | |
3992 | __vmx_complete_interrupts(to_vmx(vcpu), | |
3993 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), | |
3994 | VM_ENTRY_INSTRUCTION_LEN, | |
3995 | VM_ENTRY_EXCEPTION_ERROR_CODE); | |
3996 | ||
3997 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
3998 | } | |
3999 | ||
c801949d AK |
4000 | #ifdef CONFIG_X86_64 |
4001 | #define R "r" | |
4002 | #define Q "q" | |
4003 | #else | |
4004 | #define R "e" | |
4005 | #define Q "l" | |
4006 | #endif | |
4007 | ||
a3b5ba49 | 4008 | static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 4009 | { |
a2fa3e9f | 4010 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
104f226b AK |
4011 | |
4012 | /* Record the guest's net vcpu time for enforced NMI injections. */ | |
4013 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) | |
4014 | vmx->entry_time = ktime_get(); | |
4015 | ||
4016 | /* Don't enter VMX if guest state is invalid, let the exit handler | |
4017 | start emulation until we arrive back to a valid state */ | |
4018 | if (vmx->emulation_required && emulate_invalid_guest_state) | |
4019 | return; | |
4020 | ||
4021 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
4022 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
4023 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
4024 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
4025 | ||
4026 | /* When single-stepping over STI and MOV SS, we must clear the | |
4027 | * corresponding interruptibility bits in the guest state. Otherwise | |
4028 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
4029 | * exceptions being set, but that's not correct for the guest debugging | |
4030 | * case. */ | |
4031 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
4032 | vmx_set_interrupt_shadow(vcpu, 0); | |
4033 | ||
4034 | asm( | |
6aa8b732 | 4035 | /* Store host registers */ |
c801949d | 4036 | "push %%"R"dx; push %%"R"bp;" |
40712fae | 4037 | "push %%"R"cx \n\t" /* placeholder for guest rcx */ |
c801949d | 4038 | "push %%"R"cx \n\t" |
313dbd49 AK |
4039 | "cmp %%"R"sp, %c[host_rsp](%0) \n\t" |
4040 | "je 1f \n\t" | |
4041 | "mov %%"R"sp, %c[host_rsp](%0) \n\t" | |
4ecac3fd | 4042 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
313dbd49 | 4043 | "1: \n\t" |
d3edefc0 AK |
4044 | /* Reload cr2 if changed */ |
4045 | "mov %c[cr2](%0), %%"R"ax \n\t" | |
4046 | "mov %%cr2, %%"R"dx \n\t" | |
4047 | "cmp %%"R"ax, %%"R"dx \n\t" | |
4048 | "je 2f \n\t" | |
4049 | "mov %%"R"ax, %%cr2 \n\t" | |
4050 | "2: \n\t" | |
6aa8b732 | 4051 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 4052 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 4053 | /* Load guest registers. Don't clobber flags. */ |
c801949d AK |
4054 | "mov %c[rax](%0), %%"R"ax \n\t" |
4055 | "mov %c[rbx](%0), %%"R"bx \n\t" | |
4056 | "mov %c[rdx](%0), %%"R"dx \n\t" | |
4057 | "mov %c[rsi](%0), %%"R"si \n\t" | |
4058 | "mov %c[rdi](%0), %%"R"di \n\t" | |
4059 | "mov %c[rbp](%0), %%"R"bp \n\t" | |
05b3e0c2 | 4060 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
4061 | "mov %c[r8](%0), %%r8 \n\t" |
4062 | "mov %c[r9](%0), %%r9 \n\t" | |
4063 | "mov %c[r10](%0), %%r10 \n\t" | |
4064 | "mov %c[r11](%0), %%r11 \n\t" | |
4065 | "mov %c[r12](%0), %%r12 \n\t" | |
4066 | "mov %c[r13](%0), %%r13 \n\t" | |
4067 | "mov %c[r14](%0), %%r14 \n\t" | |
4068 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 4069 | #endif |
c801949d AK |
4070 | "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */ |
4071 | ||
6aa8b732 | 4072 | /* Enter guest mode */ |
cd2276a7 | 4073 | "jne .Llaunched \n\t" |
4ecac3fd | 4074 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
cd2276a7 | 4075 | "jmp .Lkvm_vmx_return \n\t" |
4ecac3fd | 4076 | ".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t" |
cd2276a7 | 4077 | ".Lkvm_vmx_return: " |
6aa8b732 | 4078 | /* Save guest registers, load host registers, keep flags */ |
40712fae AK |
4079 | "mov %0, %c[wordsize](%%"R"sp) \n\t" |
4080 | "pop %0 \n\t" | |
c801949d AK |
4081 | "mov %%"R"ax, %c[rax](%0) \n\t" |
4082 | "mov %%"R"bx, %c[rbx](%0) \n\t" | |
1c696d0e | 4083 | "pop"Q" %c[rcx](%0) \n\t" |
c801949d AK |
4084 | "mov %%"R"dx, %c[rdx](%0) \n\t" |
4085 | "mov %%"R"si, %c[rsi](%0) \n\t" | |
4086 | "mov %%"R"di, %c[rdi](%0) \n\t" | |
4087 | "mov %%"R"bp, %c[rbp](%0) \n\t" | |
05b3e0c2 | 4088 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
4089 | "mov %%r8, %c[r8](%0) \n\t" |
4090 | "mov %%r9, %c[r9](%0) \n\t" | |
4091 | "mov %%r10, %c[r10](%0) \n\t" | |
4092 | "mov %%r11, %c[r11](%0) \n\t" | |
4093 | "mov %%r12, %c[r12](%0) \n\t" | |
4094 | "mov %%r13, %c[r13](%0) \n\t" | |
4095 | "mov %%r14, %c[r14](%0) \n\t" | |
4096 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 4097 | #endif |
c801949d AK |
4098 | "mov %%cr2, %%"R"ax \n\t" |
4099 | "mov %%"R"ax, %c[cr2](%0) \n\t" | |
4100 | ||
1c696d0e | 4101 | "pop %%"R"bp; pop %%"R"dx \n\t" |
e08aa78a AK |
4102 | "setbe %c[fail](%0) \n\t" |
4103 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), | |
4104 | [launched]"i"(offsetof(struct vcpu_vmx, launched)), | |
4105 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), | |
313dbd49 | 4106 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
4107 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
4108 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
4109 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
4110 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
4111 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
4112 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
4113 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 4114 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
4115 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
4116 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
4117 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
4118 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
4119 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
4120 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
4121 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
4122 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 4123 | #endif |
40712fae AK |
4124 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)), |
4125 | [wordsize]"i"(sizeof(ulong)) | |
c2036300 | 4126 | : "cc", "memory" |
07d6f555 | 4127 | , R"ax", R"bx", R"di", R"si" |
c2036300 | 4128 | #ifdef CONFIG_X86_64 |
c2036300 LV |
4129 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
4130 | #endif | |
4131 | ); | |
6aa8b732 | 4132 | |
6de4f3ad | 4133 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
6de12732 | 4134 | | (1 << VCPU_EXREG_RFLAGS) |
aff48baa AK |
4135 | | (1 << VCPU_EXREG_PDPTR) |
4136 | | (1 << VCPU_EXREG_CR3)); | |
5fdbf976 MT |
4137 | vcpu->arch.regs_dirty = 0; |
4138 | ||
1155f76a AK |
4139 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
4140 | ||
d77c26fc | 4141 | asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); |
15ad7146 | 4142 | vmx->launched = 1; |
1b6269db | 4143 | |
51aa01d1 AK |
4144 | vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); |
4145 | vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
4146 | ||
4147 | vmx_complete_atomic_exit(vmx); | |
4148 | vmx_recover_nmi_blocking(vmx); | |
cf393f75 | 4149 | vmx_complete_interrupts(vmx); |
6aa8b732 AK |
4150 | } |
4151 | ||
c801949d AK |
4152 | #undef R |
4153 | #undef Q | |
4154 | ||
6aa8b732 AK |
4155 | static void vmx_free_vmcs(struct kvm_vcpu *vcpu) |
4156 | { | |
a2fa3e9f GH |
4157 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4158 | ||
4159 | if (vmx->vmcs) { | |
543e4243 | 4160 | vcpu_clear(vmx); |
a2fa3e9f GH |
4161 | free_vmcs(vmx->vmcs); |
4162 | vmx->vmcs = NULL; | |
6aa8b732 AK |
4163 | } |
4164 | } | |
4165 | ||
4166 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) | |
4167 | { | |
fb3f0f51 RR |
4168 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4169 | ||
cdbecfc3 | 4170 | free_vpid(vmx); |
6aa8b732 | 4171 | vmx_free_vmcs(vcpu); |
fb3f0f51 RR |
4172 | kfree(vmx->guest_msrs); |
4173 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 4174 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
4175 | } |
4176 | ||
4610c9cc DX |
4177 | static inline void vmcs_init(struct vmcs *vmcs) |
4178 | { | |
4179 | u64 phys_addr = __pa(per_cpu(vmxarea, raw_smp_processor_id())); | |
4180 | ||
4181 | if (!vmm_exclusive) | |
4182 | kvm_cpu_vmxon(phys_addr); | |
4183 | ||
4184 | vmcs_clear(vmcs); | |
4185 | ||
4186 | if (!vmm_exclusive) | |
4187 | kvm_cpu_vmxoff(); | |
4188 | } | |
4189 | ||
fb3f0f51 | 4190 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 4191 | { |
fb3f0f51 | 4192 | int err; |
c16f862d | 4193 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 4194 | int cpu; |
6aa8b732 | 4195 | |
a2fa3e9f | 4196 | if (!vmx) |
fb3f0f51 RR |
4197 | return ERR_PTR(-ENOMEM); |
4198 | ||
2384d2b3 SY |
4199 | allocate_vpid(vmx); |
4200 | ||
fb3f0f51 RR |
4201 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
4202 | if (err) | |
4203 | goto free_vcpu; | |
965b58a5 | 4204 | |
a2fa3e9f | 4205 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
fb3f0f51 RR |
4206 | if (!vmx->guest_msrs) { |
4207 | err = -ENOMEM; | |
4208 | goto uninit_vcpu; | |
4209 | } | |
965b58a5 | 4210 | |
a2fa3e9f GH |
4211 | vmx->vmcs = alloc_vmcs(); |
4212 | if (!vmx->vmcs) | |
fb3f0f51 | 4213 | goto free_msrs; |
a2fa3e9f | 4214 | |
4610c9cc | 4215 | vmcs_init(vmx->vmcs); |
a2fa3e9f | 4216 | |
15ad7146 AK |
4217 | cpu = get_cpu(); |
4218 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
e48672fa | 4219 | vmx->vcpu.cpu = cpu; |
8b9cf98c | 4220 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 4221 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 4222 | put_cpu(); |
fb3f0f51 RR |
4223 | if (err) |
4224 | goto free_vmcs; | |
5e4a0b3c MT |
4225 | if (vm_need_virtualize_apic_accesses(kvm)) |
4226 | if (alloc_apic_access_page(kvm) != 0) | |
4227 | goto free_vmcs; | |
fb3f0f51 | 4228 | |
b927a3ce SY |
4229 | if (enable_ept) { |
4230 | if (!kvm->arch.ept_identity_map_addr) | |
4231 | kvm->arch.ept_identity_map_addr = | |
4232 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
93ea5388 | 4233 | err = -ENOMEM; |
b7ebfb05 SY |
4234 | if (alloc_identity_pagetable(kvm) != 0) |
4235 | goto free_vmcs; | |
93ea5388 GN |
4236 | if (!init_rmode_identity_map(kvm)) |
4237 | goto free_vmcs; | |
b927a3ce | 4238 | } |
b7ebfb05 | 4239 | |
fb3f0f51 RR |
4240 | return &vmx->vcpu; |
4241 | ||
4242 | free_vmcs: | |
4243 | free_vmcs(vmx->vmcs); | |
4244 | free_msrs: | |
fb3f0f51 RR |
4245 | kfree(vmx->guest_msrs); |
4246 | uninit_vcpu: | |
4247 | kvm_vcpu_uninit(&vmx->vcpu); | |
4248 | free_vcpu: | |
cdbecfc3 | 4249 | free_vpid(vmx); |
a4770347 | 4250 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 4251 | return ERR_PTR(err); |
6aa8b732 AK |
4252 | } |
4253 | ||
002c7f7c YS |
4254 | static void __init vmx_check_processor_compat(void *rtn) |
4255 | { | |
4256 | struct vmcs_config vmcs_conf; | |
4257 | ||
4258 | *(int *)rtn = 0; | |
4259 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
4260 | *(int *)rtn = -EIO; | |
4261 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
4262 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
4263 | smp_processor_id()); | |
4264 | *(int *)rtn = -EIO; | |
4265 | } | |
4266 | } | |
4267 | ||
67253af5 SY |
4268 | static int get_ept_level(void) |
4269 | { | |
4270 | return VMX_EPT_DEFAULT_GAW + 1; | |
4271 | } | |
4272 | ||
4b12f0de | 4273 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 4274 | { |
4b12f0de SY |
4275 | u64 ret; |
4276 | ||
522c68c4 SY |
4277 | /* For VT-d and EPT combination |
4278 | * 1. MMIO: always map as UC | |
4279 | * 2. EPT with VT-d: | |
4280 | * a. VT-d without snooping control feature: can't guarantee the | |
4281 | * result, try to trust guest. | |
4282 | * b. VT-d with snooping control feature: snooping control feature of | |
4283 | * VT-d engine can guarantee the cache correctness. Just set it | |
4284 | * to WB to keep consistent with host. So the same as item 3. | |
a19a6d11 | 4285 | * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep |
522c68c4 SY |
4286 | * consistent with host MTRR |
4287 | */ | |
4b12f0de SY |
4288 | if (is_mmio) |
4289 | ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT; | |
522c68c4 SY |
4290 | else if (vcpu->kvm->arch.iommu_domain && |
4291 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)) | |
4292 | ret = kvm_get_guest_memory_type(vcpu, gfn) << | |
4293 | VMX_EPT_MT_EPTE_SHIFT; | |
4b12f0de | 4294 | else |
522c68c4 | 4295 | ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT) |
a19a6d11 | 4296 | | VMX_EPT_IPAT_BIT; |
4b12f0de SY |
4297 | |
4298 | return ret; | |
64d4d521 SY |
4299 | } |
4300 | ||
f4c9e87c AK |
4301 | #define _ER(x) { EXIT_REASON_##x, #x } |
4302 | ||
229456fc | 4303 | static const struct trace_print_flags vmx_exit_reasons_str[] = { |
f4c9e87c AK |
4304 | _ER(EXCEPTION_NMI), |
4305 | _ER(EXTERNAL_INTERRUPT), | |
4306 | _ER(TRIPLE_FAULT), | |
4307 | _ER(PENDING_INTERRUPT), | |
4308 | _ER(NMI_WINDOW), | |
4309 | _ER(TASK_SWITCH), | |
4310 | _ER(CPUID), | |
4311 | _ER(HLT), | |
4312 | _ER(INVLPG), | |
4313 | _ER(RDPMC), | |
4314 | _ER(RDTSC), | |
4315 | _ER(VMCALL), | |
4316 | _ER(VMCLEAR), | |
4317 | _ER(VMLAUNCH), | |
4318 | _ER(VMPTRLD), | |
4319 | _ER(VMPTRST), | |
4320 | _ER(VMREAD), | |
4321 | _ER(VMRESUME), | |
4322 | _ER(VMWRITE), | |
4323 | _ER(VMOFF), | |
4324 | _ER(VMON), | |
4325 | _ER(CR_ACCESS), | |
4326 | _ER(DR_ACCESS), | |
4327 | _ER(IO_INSTRUCTION), | |
4328 | _ER(MSR_READ), | |
4329 | _ER(MSR_WRITE), | |
4330 | _ER(MWAIT_INSTRUCTION), | |
4331 | _ER(MONITOR_INSTRUCTION), | |
4332 | _ER(PAUSE_INSTRUCTION), | |
4333 | _ER(MCE_DURING_VMENTRY), | |
4334 | _ER(TPR_BELOW_THRESHOLD), | |
4335 | _ER(APIC_ACCESS), | |
4336 | _ER(EPT_VIOLATION), | |
4337 | _ER(EPT_MISCONFIG), | |
4338 | _ER(WBINVD), | |
229456fc MT |
4339 | { -1, NULL } |
4340 | }; | |
4341 | ||
f4c9e87c AK |
4342 | #undef _ER |
4343 | ||
17cc3935 | 4344 | static int vmx_get_lpage_level(void) |
344f414f | 4345 | { |
878403b7 SY |
4346 | if (enable_ept && !cpu_has_vmx_ept_1g_page()) |
4347 | return PT_DIRECTORY_LEVEL; | |
4348 | else | |
4349 | /* For shadow and EPT supported 1GB page */ | |
4350 | return PT_PDPE_LEVEL; | |
344f414f JR |
4351 | } |
4352 | ||
0e851880 SY |
4353 | static void vmx_cpuid_update(struct kvm_vcpu *vcpu) |
4354 | { | |
4e47c7a6 SY |
4355 | struct kvm_cpuid_entry2 *best; |
4356 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4357 | u32 exec_control; | |
4358 | ||
4359 | vmx->rdtscp_enabled = false; | |
4360 | if (vmx_rdtscp_supported()) { | |
4361 | exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
4362 | if (exec_control & SECONDARY_EXEC_RDTSCP) { | |
4363 | best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
4364 | if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) | |
4365 | vmx->rdtscp_enabled = true; | |
4366 | else { | |
4367 | exec_control &= ~SECONDARY_EXEC_RDTSCP; | |
4368 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
4369 | exec_control); | |
4370 | } | |
4371 | } | |
4372 | } | |
0e851880 SY |
4373 | } |
4374 | ||
d4330ef2 JR |
4375 | static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
4376 | { | |
4377 | } | |
4378 | ||
cbdd1bea | 4379 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
4380 | .cpu_has_kvm_support = cpu_has_kvm_support, |
4381 | .disabled_by_bios = vmx_disabled_by_bios, | |
4382 | .hardware_setup = hardware_setup, | |
4383 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 4384 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
4385 | .hardware_enable = hardware_enable, |
4386 | .hardware_disable = hardware_disable, | |
04547156 | 4387 | .cpu_has_accelerated_tpr = report_flexpriority, |
6aa8b732 AK |
4388 | |
4389 | .vcpu_create = vmx_create_vcpu, | |
4390 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 4391 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 4392 | |
04d2cc77 | 4393 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
4394 | .vcpu_load = vmx_vcpu_load, |
4395 | .vcpu_put = vmx_vcpu_put, | |
4396 | ||
4397 | .set_guest_debug = set_guest_debug, | |
4398 | .get_msr = vmx_get_msr, | |
4399 | .set_msr = vmx_set_msr, | |
4400 | .get_segment_base = vmx_get_segment_base, | |
4401 | .get_segment = vmx_get_segment, | |
4402 | .set_segment = vmx_set_segment, | |
2e4d2653 | 4403 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 4404 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
e8467fda | 4405 | .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, |
aff48baa | 4406 | .decache_cr3 = vmx_decache_cr3, |
25c4c276 | 4407 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 4408 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
4409 | .set_cr3 = vmx_set_cr3, |
4410 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 4411 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
4412 | .get_idt = vmx_get_idt, |
4413 | .set_idt = vmx_set_idt, | |
4414 | .get_gdt = vmx_get_gdt, | |
4415 | .set_gdt = vmx_set_gdt, | |
020df079 | 4416 | .set_dr7 = vmx_set_dr7, |
5fdbf976 | 4417 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
4418 | .get_rflags = vmx_get_rflags, |
4419 | .set_rflags = vmx_set_rflags, | |
ebcbab4c | 4420 | .fpu_activate = vmx_fpu_activate, |
02daab21 | 4421 | .fpu_deactivate = vmx_fpu_deactivate, |
6aa8b732 AK |
4422 | |
4423 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 4424 | |
6aa8b732 | 4425 | .run = vmx_vcpu_run, |
6062d012 | 4426 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 4427 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
4428 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
4429 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 4430 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 4431 | .set_irq = vmx_inject_irq, |
95ba8273 | 4432 | .set_nmi = vmx_inject_nmi, |
298101da | 4433 | .queue_exception = vmx_queue_exception, |
b463a6f7 | 4434 | .cancel_injection = vmx_cancel_injection, |
78646121 | 4435 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 | 4436 | .nmi_allowed = vmx_nmi_allowed, |
3cfc3092 JK |
4437 | .get_nmi_mask = vmx_get_nmi_mask, |
4438 | .set_nmi_mask = vmx_set_nmi_mask, | |
95ba8273 GN |
4439 | .enable_nmi_window = enable_nmi_window, |
4440 | .enable_irq_window = enable_irq_window, | |
4441 | .update_cr8_intercept = update_cr8_intercept, | |
95ba8273 | 4442 | |
cbc94022 | 4443 | .set_tss_addr = vmx_set_tss_addr, |
67253af5 | 4444 | .get_tdp_level = get_ept_level, |
4b12f0de | 4445 | .get_mt_mask = vmx_get_mt_mask, |
229456fc | 4446 | |
586f9607 | 4447 | .get_exit_info = vmx_get_exit_info, |
229456fc | 4448 | .exit_reasons_str = vmx_exit_reasons_str, |
586f9607 | 4449 | |
17cc3935 | 4450 | .get_lpage_level = vmx_get_lpage_level, |
0e851880 SY |
4451 | |
4452 | .cpuid_update = vmx_cpuid_update, | |
4e47c7a6 SY |
4453 | |
4454 | .rdtscp_supported = vmx_rdtscp_supported, | |
d4330ef2 JR |
4455 | |
4456 | .set_supported_cpuid = vmx_set_supported_cpuid, | |
f5f48ee1 SY |
4457 | |
4458 | .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, | |
99e3e30a ZA |
4459 | |
4460 | .write_tsc_offset = vmx_write_tsc_offset, | |
e48672fa | 4461 | .adjust_tsc_offset = vmx_adjust_tsc_offset, |
1c97f0a0 JR |
4462 | |
4463 | .set_tdp_cr3 = vmx_set_cr3, | |
6aa8b732 AK |
4464 | }; |
4465 | ||
4466 | static int __init vmx_init(void) | |
4467 | { | |
26bb0981 AK |
4468 | int r, i; |
4469 | ||
4470 | rdmsrl_safe(MSR_EFER, &host_efer); | |
4471 | ||
4472 | for (i = 0; i < NR_VMX_MSR; ++i) | |
4473 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
fdef3ad1 | 4474 | |
3e7c73e9 | 4475 | vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
4476 | if (!vmx_io_bitmap_a) |
4477 | return -ENOMEM; | |
4478 | ||
3e7c73e9 | 4479 | vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
4480 | if (!vmx_io_bitmap_b) { |
4481 | r = -ENOMEM; | |
4482 | goto out; | |
4483 | } | |
4484 | ||
5897297b AK |
4485 | vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL); |
4486 | if (!vmx_msr_bitmap_legacy) { | |
25c5f225 SY |
4487 | r = -ENOMEM; |
4488 | goto out1; | |
4489 | } | |
4490 | ||
5897297b AK |
4491 | vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL); |
4492 | if (!vmx_msr_bitmap_longmode) { | |
4493 | r = -ENOMEM; | |
4494 | goto out2; | |
4495 | } | |
4496 | ||
fdef3ad1 HQ |
4497 | /* |
4498 | * Allow direct access to the PC debug port (it is often used for I/O | |
4499 | * delays, but the vmexits simply slow things down). | |
4500 | */ | |
3e7c73e9 AK |
4501 | memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE); |
4502 | clear_bit(0x80, vmx_io_bitmap_a); | |
fdef3ad1 | 4503 | |
3e7c73e9 | 4504 | memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE); |
fdef3ad1 | 4505 | |
5897297b AK |
4506 | memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE); |
4507 | memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE); | |
25c5f225 | 4508 | |
2384d2b3 SY |
4509 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
4510 | ||
0ee75bea AK |
4511 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), |
4512 | __alignof__(struct vcpu_vmx), THIS_MODULE); | |
fdef3ad1 | 4513 | if (r) |
5897297b | 4514 | goto out3; |
25c5f225 | 4515 | |
5897297b AK |
4516 | vmx_disable_intercept_for_msr(MSR_FS_BASE, false); |
4517 | vmx_disable_intercept_for_msr(MSR_GS_BASE, false); | |
4518 | vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true); | |
4519 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); | |
4520 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); | |
4521 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); | |
fdef3ad1 | 4522 | |
089d034e | 4523 | if (enable_ept) { |
1439442c | 4524 | bypass_guest_pf = 0; |
534e38b4 | 4525 | kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull, |
4b12f0de | 4526 | VMX_EPT_EXECUTABLE_MASK); |
5fdbcb9d SY |
4527 | kvm_enable_tdp(); |
4528 | } else | |
4529 | kvm_disable_tdp(); | |
1439442c | 4530 | |
c7addb90 AK |
4531 | if (bypass_guest_pf) |
4532 | kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull); | |
4533 | ||
fdef3ad1 HQ |
4534 | return 0; |
4535 | ||
5897297b AK |
4536 | out3: |
4537 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
25c5f225 | 4538 | out2: |
5897297b | 4539 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
fdef3ad1 | 4540 | out1: |
3e7c73e9 | 4541 | free_page((unsigned long)vmx_io_bitmap_b); |
fdef3ad1 | 4542 | out: |
3e7c73e9 | 4543 | free_page((unsigned long)vmx_io_bitmap_a); |
fdef3ad1 | 4544 | return r; |
6aa8b732 AK |
4545 | } |
4546 | ||
4547 | static void __exit vmx_exit(void) | |
4548 | { | |
5897297b AK |
4549 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
4550 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
3e7c73e9 AK |
4551 | free_page((unsigned long)vmx_io_bitmap_b); |
4552 | free_page((unsigned long)vmx_io_bitmap_a); | |
fdef3ad1 | 4553 | |
cb498ea2 | 4554 | kvm_exit(); |
6aa8b732 AK |
4555 | } |
4556 | ||
4557 | module_init(vmx_init) | |
4558 | module_exit(vmx_exit) |