Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
9611c187 | 8 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
13 | * | |
14 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
15 | * the COPYING file in the top-level directory. | |
16 | * | |
17 | */ | |
18 | ||
85f455f7 | 19 | #include "irq.h" |
1d737c8a | 20 | #include "mmu.h" |
00b27a3e | 21 | #include "cpuid.h" |
e495606d | 22 | |
edf88417 | 23 | #include <linux/kvm_host.h> |
6aa8b732 | 24 | #include <linux/module.h> |
9d8f549d | 25 | #include <linux/kernel.h> |
6aa8b732 AK |
26 | #include <linux/mm.h> |
27 | #include <linux/highmem.h> | |
e8edc6e0 | 28 | #include <linux/sched.h> |
c7addb90 | 29 | #include <linux/moduleparam.h> |
e9bda3b3 | 30 | #include <linux/mod_devicetable.h> |
229456fc | 31 | #include <linux/ftrace_event.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
cafd6659 | 33 | #include <linux/tboot.h> |
5fdbf976 | 34 | #include "kvm_cache_regs.h" |
35920a35 | 35 | #include "x86.h" |
e495606d | 36 | |
6aa8b732 | 37 | #include <asm/io.h> |
3b3be0d1 | 38 | #include <asm/desc.h> |
13673a90 | 39 | #include <asm/vmx.h> |
6210e37b | 40 | #include <asm/virtext.h> |
a0861c02 | 41 | #include <asm/mce.h> |
2acf923e DC |
42 | #include <asm/i387.h> |
43 | #include <asm/xcr.h> | |
d7cd9796 | 44 | #include <asm/perf_event.h> |
8f536b76 | 45 | #include <asm/kexec.h> |
6aa8b732 | 46 | |
229456fc MT |
47 | #include "trace.h" |
48 | ||
4ecac3fd | 49 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
5e520e62 AK |
50 | #define __ex_clear(x, reg) \ |
51 | ____kvm_handle_fault_on_reboot(x, "xor " reg " , " reg) | |
4ecac3fd | 52 | |
6aa8b732 AK |
53 | MODULE_AUTHOR("Qumranet"); |
54 | MODULE_LICENSE("GPL"); | |
55 | ||
e9bda3b3 JT |
56 | static const struct x86_cpu_id vmx_cpu_id[] = { |
57 | X86_FEATURE_MATCH(X86_FEATURE_VMX), | |
58 | {} | |
59 | }; | |
60 | MODULE_DEVICE_TABLE(x86cpu, vmx_cpu_id); | |
61 | ||
476bc001 | 62 | static bool __read_mostly enable_vpid = 1; |
736caefe | 63 | module_param_named(vpid, enable_vpid, bool, 0444); |
2384d2b3 | 64 | |
476bc001 | 65 | static bool __read_mostly flexpriority_enabled = 1; |
736caefe | 66 | module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO); |
4c9fc8ef | 67 | |
476bc001 | 68 | static bool __read_mostly enable_ept = 1; |
736caefe | 69 | module_param_named(ept, enable_ept, bool, S_IRUGO); |
d56f546d | 70 | |
476bc001 | 71 | static bool __read_mostly enable_unrestricted_guest = 1; |
3a624e29 NK |
72 | module_param_named(unrestricted_guest, |
73 | enable_unrestricted_guest, bool, S_IRUGO); | |
74 | ||
83c3a331 XH |
75 | static bool __read_mostly enable_ept_ad_bits = 1; |
76 | module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO); | |
77 | ||
a27685c3 | 78 | static bool __read_mostly emulate_invalid_guest_state = true; |
c1f8bc04 | 79 | module_param(emulate_invalid_guest_state, bool, S_IRUGO); |
04fa4d32 | 80 | |
476bc001 | 81 | static bool __read_mostly vmm_exclusive = 1; |
b923e62e DX |
82 | module_param(vmm_exclusive, bool, S_IRUGO); |
83 | ||
476bc001 | 84 | static bool __read_mostly fasteoi = 1; |
58fbbf26 KT |
85 | module_param(fasteoi, bool, S_IRUGO); |
86 | ||
257090f7 | 87 | static bool __read_mostly enable_apicv_reg_vid; |
83d4c286 | 88 | |
801d3424 NHE |
89 | /* |
90 | * If nested=1, nested virtualization is supported, i.e., guests may use | |
91 | * VMX and be a hypervisor for its own guests. If nested=0, guests may not | |
92 | * use VMX instructions. | |
93 | */ | |
476bc001 | 94 | static bool __read_mostly nested = 0; |
801d3424 NHE |
95 | module_param(nested, bool, S_IRUGO); |
96 | ||
5037878e GN |
97 | #define KVM_GUEST_CR0_MASK (X86_CR0_NW | X86_CR0_CD) |
98 | #define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST (X86_CR0_WP | X86_CR0_NE) | |
cdc0e244 AK |
99 | #define KVM_VM_CR0_ALWAYS_ON \ |
100 | (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE) | |
4c38609a AK |
101 | #define KVM_CR4_GUEST_OWNED_BITS \ |
102 | (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
103 | | X86_CR4_OSXMMEXCPT) | |
104 | ||
cdc0e244 AK |
105 | #define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) |
106 | #define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) | |
107 | ||
78ac8b47 AK |
108 | #define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM)) |
109 | ||
4b8d54f9 ZE |
110 | /* |
111 | * These 2 parameters are used to config the controls for Pause-Loop Exiting: | |
112 | * ple_gap: upper bound on the amount of time between two successive | |
113 | * executions of PAUSE in a loop. Also indicate if ple enabled. | |
00c25bce | 114 | * According to test, this time is usually smaller than 128 cycles. |
4b8d54f9 ZE |
115 | * ple_window: upper bound on the amount of time a guest is allowed to execute |
116 | * in a PAUSE loop. Tests indicate that most spinlocks are held for | |
117 | * less than 2^12 cycles | |
118 | * Time is measured based on a counter that runs at the same rate as the TSC, | |
119 | * refer SDM volume 3b section 21.6.13 & 22.1.3. | |
120 | */ | |
00c25bce | 121 | #define KVM_VMX_DEFAULT_PLE_GAP 128 |
4b8d54f9 ZE |
122 | #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 |
123 | static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP; | |
124 | module_param(ple_gap, int, S_IRUGO); | |
125 | ||
126 | static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW; | |
127 | module_param(ple_window, int, S_IRUGO); | |
128 | ||
83287ea4 AK |
129 | extern const ulong vmx_return; |
130 | ||
8bf00a52 | 131 | #define NR_AUTOLOAD_MSRS 8 |
ff2f6fe9 | 132 | #define VMCS02_POOL_SIZE 1 |
61d2ef2c | 133 | |
a2fa3e9f GH |
134 | struct vmcs { |
135 | u32 revision_id; | |
136 | u32 abort; | |
137 | char data[0]; | |
138 | }; | |
139 | ||
d462b819 NHE |
140 | /* |
141 | * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also | |
142 | * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs | |
143 | * loaded on this CPU (so we can clear them if the CPU goes down). | |
144 | */ | |
145 | struct loaded_vmcs { | |
146 | struct vmcs *vmcs; | |
147 | int cpu; | |
148 | int launched; | |
149 | struct list_head loaded_vmcss_on_cpu_link; | |
150 | }; | |
151 | ||
26bb0981 AK |
152 | struct shared_msr_entry { |
153 | unsigned index; | |
154 | u64 data; | |
d5696725 | 155 | u64 mask; |
26bb0981 AK |
156 | }; |
157 | ||
a9d30f33 NHE |
158 | /* |
159 | * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a | |
160 | * single nested guest (L2), hence the name vmcs12. Any VMX implementation has | |
161 | * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is | |
162 | * stored in guest memory specified by VMPTRLD, but is opaque to the guest, | |
163 | * which must access it using VMREAD/VMWRITE/VMCLEAR instructions. | |
164 | * More than one of these structures may exist, if L1 runs multiple L2 guests. | |
165 | * nested_vmx_run() will use the data here to build a vmcs02: a VMCS for the | |
166 | * underlying hardware which will be used to run L2. | |
167 | * This structure is packed to ensure that its layout is identical across | |
168 | * machines (necessary for live migration). | |
169 | * If there are changes in this struct, VMCS12_REVISION must be changed. | |
170 | */ | |
22bd0358 | 171 | typedef u64 natural_width; |
a9d30f33 NHE |
172 | struct __packed vmcs12 { |
173 | /* According to the Intel spec, a VMCS region must start with the | |
174 | * following two fields. Then follow implementation-specific data. | |
175 | */ | |
176 | u32 revision_id; | |
177 | u32 abort; | |
22bd0358 | 178 | |
27d6c865 NHE |
179 | u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */ |
180 | u32 padding[7]; /* room for future expansion */ | |
181 | ||
22bd0358 NHE |
182 | u64 io_bitmap_a; |
183 | u64 io_bitmap_b; | |
184 | u64 msr_bitmap; | |
185 | u64 vm_exit_msr_store_addr; | |
186 | u64 vm_exit_msr_load_addr; | |
187 | u64 vm_entry_msr_load_addr; | |
188 | u64 tsc_offset; | |
189 | u64 virtual_apic_page_addr; | |
190 | u64 apic_access_addr; | |
191 | u64 ept_pointer; | |
192 | u64 guest_physical_address; | |
193 | u64 vmcs_link_pointer; | |
194 | u64 guest_ia32_debugctl; | |
195 | u64 guest_ia32_pat; | |
196 | u64 guest_ia32_efer; | |
197 | u64 guest_ia32_perf_global_ctrl; | |
198 | u64 guest_pdptr0; | |
199 | u64 guest_pdptr1; | |
200 | u64 guest_pdptr2; | |
201 | u64 guest_pdptr3; | |
202 | u64 host_ia32_pat; | |
203 | u64 host_ia32_efer; | |
204 | u64 host_ia32_perf_global_ctrl; | |
205 | u64 padding64[8]; /* room for future expansion */ | |
206 | /* | |
207 | * To allow migration of L1 (complete with its L2 guests) between | |
208 | * machines of different natural widths (32 or 64 bit), we cannot have | |
209 | * unsigned long fields with no explict size. We use u64 (aliased | |
210 | * natural_width) instead. Luckily, x86 is little-endian. | |
211 | */ | |
212 | natural_width cr0_guest_host_mask; | |
213 | natural_width cr4_guest_host_mask; | |
214 | natural_width cr0_read_shadow; | |
215 | natural_width cr4_read_shadow; | |
216 | natural_width cr3_target_value0; | |
217 | natural_width cr3_target_value1; | |
218 | natural_width cr3_target_value2; | |
219 | natural_width cr3_target_value3; | |
220 | natural_width exit_qualification; | |
221 | natural_width guest_linear_address; | |
222 | natural_width guest_cr0; | |
223 | natural_width guest_cr3; | |
224 | natural_width guest_cr4; | |
225 | natural_width guest_es_base; | |
226 | natural_width guest_cs_base; | |
227 | natural_width guest_ss_base; | |
228 | natural_width guest_ds_base; | |
229 | natural_width guest_fs_base; | |
230 | natural_width guest_gs_base; | |
231 | natural_width guest_ldtr_base; | |
232 | natural_width guest_tr_base; | |
233 | natural_width guest_gdtr_base; | |
234 | natural_width guest_idtr_base; | |
235 | natural_width guest_dr7; | |
236 | natural_width guest_rsp; | |
237 | natural_width guest_rip; | |
238 | natural_width guest_rflags; | |
239 | natural_width guest_pending_dbg_exceptions; | |
240 | natural_width guest_sysenter_esp; | |
241 | natural_width guest_sysenter_eip; | |
242 | natural_width host_cr0; | |
243 | natural_width host_cr3; | |
244 | natural_width host_cr4; | |
245 | natural_width host_fs_base; | |
246 | natural_width host_gs_base; | |
247 | natural_width host_tr_base; | |
248 | natural_width host_gdtr_base; | |
249 | natural_width host_idtr_base; | |
250 | natural_width host_ia32_sysenter_esp; | |
251 | natural_width host_ia32_sysenter_eip; | |
252 | natural_width host_rsp; | |
253 | natural_width host_rip; | |
254 | natural_width paddingl[8]; /* room for future expansion */ | |
255 | u32 pin_based_vm_exec_control; | |
256 | u32 cpu_based_vm_exec_control; | |
257 | u32 exception_bitmap; | |
258 | u32 page_fault_error_code_mask; | |
259 | u32 page_fault_error_code_match; | |
260 | u32 cr3_target_count; | |
261 | u32 vm_exit_controls; | |
262 | u32 vm_exit_msr_store_count; | |
263 | u32 vm_exit_msr_load_count; | |
264 | u32 vm_entry_controls; | |
265 | u32 vm_entry_msr_load_count; | |
266 | u32 vm_entry_intr_info_field; | |
267 | u32 vm_entry_exception_error_code; | |
268 | u32 vm_entry_instruction_len; | |
269 | u32 tpr_threshold; | |
270 | u32 secondary_vm_exec_control; | |
271 | u32 vm_instruction_error; | |
272 | u32 vm_exit_reason; | |
273 | u32 vm_exit_intr_info; | |
274 | u32 vm_exit_intr_error_code; | |
275 | u32 idt_vectoring_info_field; | |
276 | u32 idt_vectoring_error_code; | |
277 | u32 vm_exit_instruction_len; | |
278 | u32 vmx_instruction_info; | |
279 | u32 guest_es_limit; | |
280 | u32 guest_cs_limit; | |
281 | u32 guest_ss_limit; | |
282 | u32 guest_ds_limit; | |
283 | u32 guest_fs_limit; | |
284 | u32 guest_gs_limit; | |
285 | u32 guest_ldtr_limit; | |
286 | u32 guest_tr_limit; | |
287 | u32 guest_gdtr_limit; | |
288 | u32 guest_idtr_limit; | |
289 | u32 guest_es_ar_bytes; | |
290 | u32 guest_cs_ar_bytes; | |
291 | u32 guest_ss_ar_bytes; | |
292 | u32 guest_ds_ar_bytes; | |
293 | u32 guest_fs_ar_bytes; | |
294 | u32 guest_gs_ar_bytes; | |
295 | u32 guest_ldtr_ar_bytes; | |
296 | u32 guest_tr_ar_bytes; | |
297 | u32 guest_interruptibility_info; | |
298 | u32 guest_activity_state; | |
299 | u32 guest_sysenter_cs; | |
300 | u32 host_ia32_sysenter_cs; | |
301 | u32 padding32[8]; /* room for future expansion */ | |
302 | u16 virtual_processor_id; | |
303 | u16 guest_es_selector; | |
304 | u16 guest_cs_selector; | |
305 | u16 guest_ss_selector; | |
306 | u16 guest_ds_selector; | |
307 | u16 guest_fs_selector; | |
308 | u16 guest_gs_selector; | |
309 | u16 guest_ldtr_selector; | |
310 | u16 guest_tr_selector; | |
311 | u16 host_es_selector; | |
312 | u16 host_cs_selector; | |
313 | u16 host_ss_selector; | |
314 | u16 host_ds_selector; | |
315 | u16 host_fs_selector; | |
316 | u16 host_gs_selector; | |
317 | u16 host_tr_selector; | |
a9d30f33 NHE |
318 | }; |
319 | ||
320 | /* | |
321 | * VMCS12_REVISION is an arbitrary id that should be changed if the content or | |
322 | * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and | |
323 | * VMPTRLD verifies that the VMCS region that L1 is loading contains this id. | |
324 | */ | |
325 | #define VMCS12_REVISION 0x11e57ed0 | |
326 | ||
327 | /* | |
328 | * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region | |
329 | * and any VMCS region. Although only sizeof(struct vmcs12) are used by the | |
330 | * current implementation, 4K are reserved to avoid future complications. | |
331 | */ | |
332 | #define VMCS12_SIZE 0x1000 | |
333 | ||
ff2f6fe9 NHE |
334 | /* Used to remember the last vmcs02 used for some recently used vmcs12s */ |
335 | struct vmcs02_list { | |
336 | struct list_head list; | |
337 | gpa_t vmptr; | |
338 | struct loaded_vmcs vmcs02; | |
339 | }; | |
340 | ||
ec378aee NHE |
341 | /* |
342 | * The nested_vmx structure is part of vcpu_vmx, and holds information we need | |
343 | * for correct emulation of VMX (i.e., nested VMX) on this vcpu. | |
344 | */ | |
345 | struct nested_vmx { | |
346 | /* Has the level1 guest done vmxon? */ | |
347 | bool vmxon; | |
a9d30f33 NHE |
348 | |
349 | /* The guest-physical address of the current VMCS L1 keeps for L2 */ | |
350 | gpa_t current_vmptr; | |
351 | /* The host-usable pointer to the above */ | |
352 | struct page *current_vmcs12_page; | |
353 | struct vmcs12 *current_vmcs12; | |
ff2f6fe9 NHE |
354 | |
355 | /* vmcs02_list cache of VMCSs recently used to run L2 guests */ | |
356 | struct list_head vmcs02_pool; | |
357 | int vmcs02_num; | |
fe3ef05c | 358 | u64 vmcs01_tsc_offset; |
644d711a NHE |
359 | /* L2 must run next, and mustn't decide to exit to L1. */ |
360 | bool nested_run_pending; | |
fe3ef05c NHE |
361 | /* |
362 | * Guest pages referred to in vmcs02 with host-physical pointers, so | |
363 | * we must keep them pinned while L2 runs. | |
364 | */ | |
365 | struct page *apic_access_page; | |
ec378aee NHE |
366 | }; |
367 | ||
a2fa3e9f | 368 | struct vcpu_vmx { |
fb3f0f51 | 369 | struct kvm_vcpu vcpu; |
313dbd49 | 370 | unsigned long host_rsp; |
29bd8a78 | 371 | u8 fail; |
69c73028 | 372 | u8 cpl; |
9d58b931 | 373 | bool nmi_known_unmasked; |
51aa01d1 | 374 | u32 exit_intr_info; |
1155f76a | 375 | u32 idt_vectoring_info; |
6de12732 | 376 | ulong rflags; |
26bb0981 | 377 | struct shared_msr_entry *guest_msrs; |
a2fa3e9f GH |
378 | int nmsrs; |
379 | int save_nmsrs; | |
a2fa3e9f | 380 | #ifdef CONFIG_X86_64 |
44ea2b17 AK |
381 | u64 msr_host_kernel_gs_base; |
382 | u64 msr_guest_kernel_gs_base; | |
a2fa3e9f | 383 | #endif |
d462b819 NHE |
384 | /* |
385 | * loaded_vmcs points to the VMCS currently used in this vcpu. For a | |
386 | * non-nested (L1) guest, it always points to vmcs01. For a nested | |
387 | * guest (L2), it points to a different VMCS. | |
388 | */ | |
389 | struct loaded_vmcs vmcs01; | |
390 | struct loaded_vmcs *loaded_vmcs; | |
391 | bool __launched; /* temporary, used in vmx_vcpu_run */ | |
61d2ef2c AK |
392 | struct msr_autoload { |
393 | unsigned nr; | |
394 | struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS]; | |
395 | struct vmx_msr_entry host[NR_AUTOLOAD_MSRS]; | |
396 | } msr_autoload; | |
a2fa3e9f GH |
397 | struct { |
398 | int loaded; | |
399 | u16 fs_sel, gs_sel, ldt_sel; | |
b2da15ac AK |
400 | #ifdef CONFIG_X86_64 |
401 | u16 ds_sel, es_sel; | |
402 | #endif | |
152d3f2f LV |
403 | int gs_ldt_reload_needed; |
404 | int fs_reload_needed; | |
d77c26fc | 405 | } host_state; |
9c8cba37 | 406 | struct { |
7ffd92c5 | 407 | int vm86_active; |
78ac8b47 | 408 | ulong save_rflags; |
f5f7b2fe AK |
409 | struct kvm_segment segs[8]; |
410 | } rmode; | |
411 | struct { | |
412 | u32 bitmask; /* 4 bits per segment (1 bit per field) */ | |
7ffd92c5 AK |
413 | struct kvm_save_segment { |
414 | u16 selector; | |
415 | unsigned long base; | |
416 | u32 limit; | |
417 | u32 ar; | |
f5f7b2fe | 418 | } seg[8]; |
2fb92db1 | 419 | } segment_cache; |
2384d2b3 | 420 | int vpid; |
04fa4d32 | 421 | bool emulation_required; |
3b86cd99 JK |
422 | |
423 | /* Support for vnmi-less CPUs */ | |
424 | int soft_vnmi_blocked; | |
425 | ktime_t entry_time; | |
426 | s64 vnmi_blocked_time; | |
a0861c02 | 427 | u32 exit_reason; |
4e47c7a6 SY |
428 | |
429 | bool rdtscp_enabled; | |
ec378aee NHE |
430 | |
431 | /* Support for a guest hypervisor (nested VMX) */ | |
432 | struct nested_vmx nested; | |
a2fa3e9f GH |
433 | }; |
434 | ||
2fb92db1 AK |
435 | enum segment_cache_field { |
436 | SEG_FIELD_SEL = 0, | |
437 | SEG_FIELD_BASE = 1, | |
438 | SEG_FIELD_LIMIT = 2, | |
439 | SEG_FIELD_AR = 3, | |
440 | ||
441 | SEG_FIELD_NR = 4 | |
442 | }; | |
443 | ||
a2fa3e9f GH |
444 | static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu) |
445 | { | |
fb3f0f51 | 446 | return container_of(vcpu, struct vcpu_vmx, vcpu); |
a2fa3e9f GH |
447 | } |
448 | ||
22bd0358 NHE |
449 | #define VMCS12_OFFSET(x) offsetof(struct vmcs12, x) |
450 | #define FIELD(number, name) [number] = VMCS12_OFFSET(name) | |
451 | #define FIELD64(number, name) [number] = VMCS12_OFFSET(name), \ | |
452 | [number##_HIGH] = VMCS12_OFFSET(name)+4 | |
453 | ||
772e0318 | 454 | static const unsigned short vmcs_field_to_offset_table[] = { |
22bd0358 NHE |
455 | FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id), |
456 | FIELD(GUEST_ES_SELECTOR, guest_es_selector), | |
457 | FIELD(GUEST_CS_SELECTOR, guest_cs_selector), | |
458 | FIELD(GUEST_SS_SELECTOR, guest_ss_selector), | |
459 | FIELD(GUEST_DS_SELECTOR, guest_ds_selector), | |
460 | FIELD(GUEST_FS_SELECTOR, guest_fs_selector), | |
461 | FIELD(GUEST_GS_SELECTOR, guest_gs_selector), | |
462 | FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector), | |
463 | FIELD(GUEST_TR_SELECTOR, guest_tr_selector), | |
464 | FIELD(HOST_ES_SELECTOR, host_es_selector), | |
465 | FIELD(HOST_CS_SELECTOR, host_cs_selector), | |
466 | FIELD(HOST_SS_SELECTOR, host_ss_selector), | |
467 | FIELD(HOST_DS_SELECTOR, host_ds_selector), | |
468 | FIELD(HOST_FS_SELECTOR, host_fs_selector), | |
469 | FIELD(HOST_GS_SELECTOR, host_gs_selector), | |
470 | FIELD(HOST_TR_SELECTOR, host_tr_selector), | |
471 | FIELD64(IO_BITMAP_A, io_bitmap_a), | |
472 | FIELD64(IO_BITMAP_B, io_bitmap_b), | |
473 | FIELD64(MSR_BITMAP, msr_bitmap), | |
474 | FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr), | |
475 | FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr), | |
476 | FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr), | |
477 | FIELD64(TSC_OFFSET, tsc_offset), | |
478 | FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr), | |
479 | FIELD64(APIC_ACCESS_ADDR, apic_access_addr), | |
480 | FIELD64(EPT_POINTER, ept_pointer), | |
481 | FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address), | |
482 | FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer), | |
483 | FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl), | |
484 | FIELD64(GUEST_IA32_PAT, guest_ia32_pat), | |
485 | FIELD64(GUEST_IA32_EFER, guest_ia32_efer), | |
486 | FIELD64(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl), | |
487 | FIELD64(GUEST_PDPTR0, guest_pdptr0), | |
488 | FIELD64(GUEST_PDPTR1, guest_pdptr1), | |
489 | FIELD64(GUEST_PDPTR2, guest_pdptr2), | |
490 | FIELD64(GUEST_PDPTR3, guest_pdptr3), | |
491 | FIELD64(HOST_IA32_PAT, host_ia32_pat), | |
492 | FIELD64(HOST_IA32_EFER, host_ia32_efer), | |
493 | FIELD64(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl), | |
494 | FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control), | |
495 | FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control), | |
496 | FIELD(EXCEPTION_BITMAP, exception_bitmap), | |
497 | FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask), | |
498 | FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match), | |
499 | FIELD(CR3_TARGET_COUNT, cr3_target_count), | |
500 | FIELD(VM_EXIT_CONTROLS, vm_exit_controls), | |
501 | FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count), | |
502 | FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count), | |
503 | FIELD(VM_ENTRY_CONTROLS, vm_entry_controls), | |
504 | FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count), | |
505 | FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field), | |
506 | FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code), | |
507 | FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len), | |
508 | FIELD(TPR_THRESHOLD, tpr_threshold), | |
509 | FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control), | |
510 | FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error), | |
511 | FIELD(VM_EXIT_REASON, vm_exit_reason), | |
512 | FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info), | |
513 | FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code), | |
514 | FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field), | |
515 | FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code), | |
516 | FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len), | |
517 | FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info), | |
518 | FIELD(GUEST_ES_LIMIT, guest_es_limit), | |
519 | FIELD(GUEST_CS_LIMIT, guest_cs_limit), | |
520 | FIELD(GUEST_SS_LIMIT, guest_ss_limit), | |
521 | FIELD(GUEST_DS_LIMIT, guest_ds_limit), | |
522 | FIELD(GUEST_FS_LIMIT, guest_fs_limit), | |
523 | FIELD(GUEST_GS_LIMIT, guest_gs_limit), | |
524 | FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit), | |
525 | FIELD(GUEST_TR_LIMIT, guest_tr_limit), | |
526 | FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit), | |
527 | FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit), | |
528 | FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes), | |
529 | FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes), | |
530 | FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes), | |
531 | FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes), | |
532 | FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes), | |
533 | FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes), | |
534 | FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes), | |
535 | FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes), | |
536 | FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info), | |
537 | FIELD(GUEST_ACTIVITY_STATE, guest_activity_state), | |
538 | FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs), | |
539 | FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs), | |
540 | FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask), | |
541 | FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask), | |
542 | FIELD(CR0_READ_SHADOW, cr0_read_shadow), | |
543 | FIELD(CR4_READ_SHADOW, cr4_read_shadow), | |
544 | FIELD(CR3_TARGET_VALUE0, cr3_target_value0), | |
545 | FIELD(CR3_TARGET_VALUE1, cr3_target_value1), | |
546 | FIELD(CR3_TARGET_VALUE2, cr3_target_value2), | |
547 | FIELD(CR3_TARGET_VALUE3, cr3_target_value3), | |
548 | FIELD(EXIT_QUALIFICATION, exit_qualification), | |
549 | FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address), | |
550 | FIELD(GUEST_CR0, guest_cr0), | |
551 | FIELD(GUEST_CR3, guest_cr3), | |
552 | FIELD(GUEST_CR4, guest_cr4), | |
553 | FIELD(GUEST_ES_BASE, guest_es_base), | |
554 | FIELD(GUEST_CS_BASE, guest_cs_base), | |
555 | FIELD(GUEST_SS_BASE, guest_ss_base), | |
556 | FIELD(GUEST_DS_BASE, guest_ds_base), | |
557 | FIELD(GUEST_FS_BASE, guest_fs_base), | |
558 | FIELD(GUEST_GS_BASE, guest_gs_base), | |
559 | FIELD(GUEST_LDTR_BASE, guest_ldtr_base), | |
560 | FIELD(GUEST_TR_BASE, guest_tr_base), | |
561 | FIELD(GUEST_GDTR_BASE, guest_gdtr_base), | |
562 | FIELD(GUEST_IDTR_BASE, guest_idtr_base), | |
563 | FIELD(GUEST_DR7, guest_dr7), | |
564 | FIELD(GUEST_RSP, guest_rsp), | |
565 | FIELD(GUEST_RIP, guest_rip), | |
566 | FIELD(GUEST_RFLAGS, guest_rflags), | |
567 | FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions), | |
568 | FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp), | |
569 | FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip), | |
570 | FIELD(HOST_CR0, host_cr0), | |
571 | FIELD(HOST_CR3, host_cr3), | |
572 | FIELD(HOST_CR4, host_cr4), | |
573 | FIELD(HOST_FS_BASE, host_fs_base), | |
574 | FIELD(HOST_GS_BASE, host_gs_base), | |
575 | FIELD(HOST_TR_BASE, host_tr_base), | |
576 | FIELD(HOST_GDTR_BASE, host_gdtr_base), | |
577 | FIELD(HOST_IDTR_BASE, host_idtr_base), | |
578 | FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp), | |
579 | FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip), | |
580 | FIELD(HOST_RSP, host_rsp), | |
581 | FIELD(HOST_RIP, host_rip), | |
582 | }; | |
583 | static const int max_vmcs_field = ARRAY_SIZE(vmcs_field_to_offset_table); | |
584 | ||
585 | static inline short vmcs_field_to_offset(unsigned long field) | |
586 | { | |
587 | if (field >= max_vmcs_field || vmcs_field_to_offset_table[field] == 0) | |
588 | return -1; | |
589 | return vmcs_field_to_offset_table[field]; | |
590 | } | |
591 | ||
a9d30f33 NHE |
592 | static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu) |
593 | { | |
594 | return to_vmx(vcpu)->nested.current_vmcs12; | |
595 | } | |
596 | ||
597 | static struct page *nested_get_page(struct kvm_vcpu *vcpu, gpa_t addr) | |
598 | { | |
599 | struct page *page = gfn_to_page(vcpu->kvm, addr >> PAGE_SHIFT); | |
32cad84f | 600 | if (is_error_page(page)) |
a9d30f33 | 601 | return NULL; |
32cad84f | 602 | |
a9d30f33 NHE |
603 | return page; |
604 | } | |
605 | ||
606 | static void nested_release_page(struct page *page) | |
607 | { | |
608 | kvm_release_page_dirty(page); | |
609 | } | |
610 | ||
611 | static void nested_release_page_clean(struct page *page) | |
612 | { | |
613 | kvm_release_page_clean(page); | |
614 | } | |
615 | ||
4e1096d2 | 616 | static u64 construct_eptp(unsigned long root_hpa); |
4610c9cc DX |
617 | static void kvm_cpu_vmxon(u64 addr); |
618 | static void kvm_cpu_vmxoff(void); | |
aff48baa | 619 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3); |
776e58ea | 620 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr); |
b246dd5d OW |
621 | static void vmx_set_segment(struct kvm_vcpu *vcpu, |
622 | struct kvm_segment *var, int seg); | |
623 | static void vmx_get_segment(struct kvm_vcpu *vcpu, | |
624 | struct kvm_segment *var, int seg); | |
d99e4152 GN |
625 | static bool guest_state_valid(struct kvm_vcpu *vcpu); |
626 | static u32 vmx_segment_access_rights(struct kvm_segment *var); | |
75880a01 | 627 | |
6aa8b732 AK |
628 | static DEFINE_PER_CPU(struct vmcs *, vmxarea); |
629 | static DEFINE_PER_CPU(struct vmcs *, current_vmcs); | |
d462b819 NHE |
630 | /* |
631 | * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed | |
632 | * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it. | |
633 | */ | |
634 | static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu); | |
3444d7da | 635 | static DEFINE_PER_CPU(struct desc_ptr, host_gdt); |
6aa8b732 | 636 | |
3e7c73e9 AK |
637 | static unsigned long *vmx_io_bitmap_a; |
638 | static unsigned long *vmx_io_bitmap_b; | |
5897297b AK |
639 | static unsigned long *vmx_msr_bitmap_legacy; |
640 | static unsigned long *vmx_msr_bitmap_longmode; | |
8d14695f YZ |
641 | static unsigned long *vmx_msr_bitmap_legacy_x2apic; |
642 | static unsigned long *vmx_msr_bitmap_longmode_x2apic; | |
fdef3ad1 | 643 | |
110312c8 | 644 | static bool cpu_has_load_ia32_efer; |
8bf00a52 | 645 | static bool cpu_has_load_perf_global_ctrl; |
110312c8 | 646 | |
2384d2b3 SY |
647 | static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS); |
648 | static DEFINE_SPINLOCK(vmx_vpid_lock); | |
649 | ||
1c3d14fe | 650 | static struct vmcs_config { |
6aa8b732 AK |
651 | int size; |
652 | int order; | |
653 | u32 revision_id; | |
1c3d14fe YS |
654 | u32 pin_based_exec_ctrl; |
655 | u32 cpu_based_exec_ctrl; | |
f78e0e2e | 656 | u32 cpu_based_2nd_exec_ctrl; |
1c3d14fe YS |
657 | u32 vmexit_ctrl; |
658 | u32 vmentry_ctrl; | |
659 | } vmcs_config; | |
6aa8b732 | 660 | |
efff9e53 | 661 | static struct vmx_capability { |
d56f546d SY |
662 | u32 ept; |
663 | u32 vpid; | |
664 | } vmx_capability; | |
665 | ||
6aa8b732 AK |
666 | #define VMX_SEGMENT_FIELD(seg) \ |
667 | [VCPU_SREG_##seg] = { \ | |
668 | .selector = GUEST_##seg##_SELECTOR, \ | |
669 | .base = GUEST_##seg##_BASE, \ | |
670 | .limit = GUEST_##seg##_LIMIT, \ | |
671 | .ar_bytes = GUEST_##seg##_AR_BYTES, \ | |
672 | } | |
673 | ||
772e0318 | 674 | static const struct kvm_vmx_segment_field { |
6aa8b732 AK |
675 | unsigned selector; |
676 | unsigned base; | |
677 | unsigned limit; | |
678 | unsigned ar_bytes; | |
679 | } kvm_vmx_segment_fields[] = { | |
680 | VMX_SEGMENT_FIELD(CS), | |
681 | VMX_SEGMENT_FIELD(DS), | |
682 | VMX_SEGMENT_FIELD(ES), | |
683 | VMX_SEGMENT_FIELD(FS), | |
684 | VMX_SEGMENT_FIELD(GS), | |
685 | VMX_SEGMENT_FIELD(SS), | |
686 | VMX_SEGMENT_FIELD(TR), | |
687 | VMX_SEGMENT_FIELD(LDTR), | |
688 | }; | |
689 | ||
26bb0981 AK |
690 | static u64 host_efer; |
691 | ||
6de4f3ad AK |
692 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu); |
693 | ||
4d56c8a7 | 694 | /* |
8c06585d | 695 | * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it |
4d56c8a7 AK |
696 | * away by decrementing the array size. |
697 | */ | |
6aa8b732 | 698 | static const u32 vmx_msr_index[] = { |
05b3e0c2 | 699 | #ifdef CONFIG_X86_64 |
44ea2b17 | 700 | MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, |
6aa8b732 | 701 | #endif |
8c06585d | 702 | MSR_EFER, MSR_TSC_AUX, MSR_STAR, |
6aa8b732 | 703 | }; |
9d8f549d | 704 | #define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) |
6aa8b732 | 705 | |
31299944 | 706 | static inline bool is_page_fault(u32 intr_info) |
6aa8b732 AK |
707 | { |
708 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
709 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 710 | (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK); |
6aa8b732 AK |
711 | } |
712 | ||
31299944 | 713 | static inline bool is_no_device(u32 intr_info) |
2ab455cc AL |
714 | { |
715 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
716 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 717 | (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK); |
2ab455cc AL |
718 | } |
719 | ||
31299944 | 720 | static inline bool is_invalid_opcode(u32 intr_info) |
7aa81cc0 AL |
721 | { |
722 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
723 | INTR_INFO_VALID_MASK)) == | |
8ab2d2e2 | 724 | (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK); |
7aa81cc0 AL |
725 | } |
726 | ||
31299944 | 727 | static inline bool is_external_interrupt(u32 intr_info) |
6aa8b732 AK |
728 | { |
729 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
730 | == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK); | |
731 | } | |
732 | ||
31299944 | 733 | static inline bool is_machine_check(u32 intr_info) |
a0861c02 AK |
734 | { |
735 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK | | |
736 | INTR_INFO_VALID_MASK)) == | |
737 | (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK); | |
738 | } | |
739 | ||
31299944 | 740 | static inline bool cpu_has_vmx_msr_bitmap(void) |
25c5f225 | 741 | { |
04547156 | 742 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; |
25c5f225 SY |
743 | } |
744 | ||
31299944 | 745 | static inline bool cpu_has_vmx_tpr_shadow(void) |
6e5d865c | 746 | { |
04547156 | 747 | return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; |
6e5d865c YS |
748 | } |
749 | ||
31299944 | 750 | static inline bool vm_need_tpr_shadow(struct kvm *kvm) |
6e5d865c | 751 | { |
04547156 | 752 | return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)); |
6e5d865c YS |
753 | } |
754 | ||
31299944 | 755 | static inline bool cpu_has_secondary_exec_ctrls(void) |
f78e0e2e | 756 | { |
04547156 SY |
757 | return vmcs_config.cpu_based_exec_ctrl & |
758 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; | |
f78e0e2e SY |
759 | } |
760 | ||
774ead3a | 761 | static inline bool cpu_has_vmx_virtualize_apic_accesses(void) |
f78e0e2e | 762 | { |
04547156 SY |
763 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
764 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
765 | } | |
766 | ||
8d14695f YZ |
767 | static inline bool cpu_has_vmx_virtualize_x2apic_mode(void) |
768 | { | |
769 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
770 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
771 | } | |
772 | ||
83d4c286 YZ |
773 | static inline bool cpu_has_vmx_apic_register_virt(void) |
774 | { | |
775 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
776 | SECONDARY_EXEC_APIC_REGISTER_VIRT; | |
777 | } | |
778 | ||
c7c9c56c YZ |
779 | static inline bool cpu_has_vmx_virtual_intr_delivery(void) |
780 | { | |
781 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
782 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; | |
783 | } | |
784 | ||
04547156 SY |
785 | static inline bool cpu_has_vmx_flexpriority(void) |
786 | { | |
787 | return cpu_has_vmx_tpr_shadow() && | |
788 | cpu_has_vmx_virtualize_apic_accesses(); | |
f78e0e2e SY |
789 | } |
790 | ||
e799794e MT |
791 | static inline bool cpu_has_vmx_ept_execute_only(void) |
792 | { | |
31299944 | 793 | return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; |
e799794e MT |
794 | } |
795 | ||
796 | static inline bool cpu_has_vmx_eptp_uncacheable(void) | |
797 | { | |
31299944 | 798 | return vmx_capability.ept & VMX_EPTP_UC_BIT; |
e799794e MT |
799 | } |
800 | ||
801 | static inline bool cpu_has_vmx_eptp_writeback(void) | |
802 | { | |
31299944 | 803 | return vmx_capability.ept & VMX_EPTP_WB_BIT; |
e799794e MT |
804 | } |
805 | ||
806 | static inline bool cpu_has_vmx_ept_2m_page(void) | |
807 | { | |
31299944 | 808 | return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; |
e799794e MT |
809 | } |
810 | ||
878403b7 SY |
811 | static inline bool cpu_has_vmx_ept_1g_page(void) |
812 | { | |
31299944 | 813 | return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; |
878403b7 SY |
814 | } |
815 | ||
4bc9b982 SY |
816 | static inline bool cpu_has_vmx_ept_4levels(void) |
817 | { | |
818 | return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; | |
819 | } | |
820 | ||
83c3a331 XH |
821 | static inline bool cpu_has_vmx_ept_ad_bits(void) |
822 | { | |
823 | return vmx_capability.ept & VMX_EPT_AD_BIT; | |
824 | } | |
825 | ||
31299944 | 826 | static inline bool cpu_has_vmx_invept_context(void) |
d56f546d | 827 | { |
31299944 | 828 | return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; |
d56f546d SY |
829 | } |
830 | ||
31299944 | 831 | static inline bool cpu_has_vmx_invept_global(void) |
d56f546d | 832 | { |
31299944 | 833 | return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; |
d56f546d SY |
834 | } |
835 | ||
518c8aee GJ |
836 | static inline bool cpu_has_vmx_invvpid_single(void) |
837 | { | |
838 | return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; | |
839 | } | |
840 | ||
b9d762fa GJ |
841 | static inline bool cpu_has_vmx_invvpid_global(void) |
842 | { | |
843 | return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; | |
844 | } | |
845 | ||
31299944 | 846 | static inline bool cpu_has_vmx_ept(void) |
d56f546d | 847 | { |
04547156 SY |
848 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
849 | SECONDARY_EXEC_ENABLE_EPT; | |
d56f546d SY |
850 | } |
851 | ||
31299944 | 852 | static inline bool cpu_has_vmx_unrestricted_guest(void) |
3a624e29 NK |
853 | { |
854 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
855 | SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
856 | } | |
857 | ||
31299944 | 858 | static inline bool cpu_has_vmx_ple(void) |
4b8d54f9 ZE |
859 | { |
860 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
861 | SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
862 | } | |
863 | ||
31299944 | 864 | static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm) |
f78e0e2e | 865 | { |
6d3e435e | 866 | return flexpriority_enabled && irqchip_in_kernel(kvm); |
f78e0e2e SY |
867 | } |
868 | ||
31299944 | 869 | static inline bool cpu_has_vmx_vpid(void) |
2384d2b3 | 870 | { |
04547156 SY |
871 | return vmcs_config.cpu_based_2nd_exec_ctrl & |
872 | SECONDARY_EXEC_ENABLE_VPID; | |
2384d2b3 SY |
873 | } |
874 | ||
31299944 | 875 | static inline bool cpu_has_vmx_rdtscp(void) |
4e47c7a6 SY |
876 | { |
877 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
878 | SECONDARY_EXEC_RDTSCP; | |
879 | } | |
880 | ||
ad756a16 MJ |
881 | static inline bool cpu_has_vmx_invpcid(void) |
882 | { | |
883 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
884 | SECONDARY_EXEC_ENABLE_INVPCID; | |
885 | } | |
886 | ||
31299944 | 887 | static inline bool cpu_has_virtual_nmis(void) |
f08864b4 SY |
888 | { |
889 | return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; | |
890 | } | |
891 | ||
f5f48ee1 SY |
892 | static inline bool cpu_has_vmx_wbinvd_exit(void) |
893 | { | |
894 | return vmcs_config.cpu_based_2nd_exec_ctrl & | |
895 | SECONDARY_EXEC_WBINVD_EXITING; | |
896 | } | |
897 | ||
04547156 SY |
898 | static inline bool report_flexpriority(void) |
899 | { | |
900 | return flexpriority_enabled; | |
901 | } | |
902 | ||
fe3ef05c NHE |
903 | static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit) |
904 | { | |
905 | return vmcs12->cpu_based_vm_exec_control & bit; | |
906 | } | |
907 | ||
908 | static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit) | |
909 | { | |
910 | return (vmcs12->cpu_based_vm_exec_control & | |
911 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) && | |
912 | (vmcs12->secondary_vm_exec_control & bit); | |
913 | } | |
914 | ||
644d711a NHE |
915 | static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12, |
916 | struct kvm_vcpu *vcpu) | |
917 | { | |
918 | return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS; | |
919 | } | |
920 | ||
921 | static inline bool is_exception(u32 intr_info) | |
922 | { | |
923 | return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK)) | |
924 | == (INTR_TYPE_HARD_EXCEPTION | INTR_INFO_VALID_MASK); | |
925 | } | |
926 | ||
927 | static void nested_vmx_vmexit(struct kvm_vcpu *vcpu); | |
7c177938 NHE |
928 | static void nested_vmx_entry_failure(struct kvm_vcpu *vcpu, |
929 | struct vmcs12 *vmcs12, | |
930 | u32 reason, unsigned long qualification); | |
931 | ||
8b9cf98c | 932 | static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr) |
7725f0ba AK |
933 | { |
934 | int i; | |
935 | ||
a2fa3e9f | 936 | for (i = 0; i < vmx->nmsrs; ++i) |
26bb0981 | 937 | if (vmx_msr_index[vmx->guest_msrs[i].index] == msr) |
a75beee6 ED |
938 | return i; |
939 | return -1; | |
940 | } | |
941 | ||
2384d2b3 SY |
942 | static inline void __invvpid(int ext, u16 vpid, gva_t gva) |
943 | { | |
944 | struct { | |
945 | u64 vpid : 16; | |
946 | u64 rsvd : 48; | |
947 | u64 gva; | |
948 | } operand = { vpid, 0, gva }; | |
949 | ||
4ecac3fd | 950 | asm volatile (__ex(ASM_VMX_INVVPID) |
2384d2b3 SY |
951 | /* CF==1 or ZF==1 --> rc = -1 */ |
952 | "; ja 1f ; ud2 ; 1:" | |
953 | : : "a"(&operand), "c"(ext) : "cc", "memory"); | |
954 | } | |
955 | ||
1439442c SY |
956 | static inline void __invept(int ext, u64 eptp, gpa_t gpa) |
957 | { | |
958 | struct { | |
959 | u64 eptp, gpa; | |
960 | } operand = {eptp, gpa}; | |
961 | ||
4ecac3fd | 962 | asm volatile (__ex(ASM_VMX_INVEPT) |
1439442c SY |
963 | /* CF==1 or ZF==1 --> rc = -1 */ |
964 | "; ja 1f ; ud2 ; 1:\n" | |
965 | : : "a" (&operand), "c" (ext) : "cc", "memory"); | |
966 | } | |
967 | ||
26bb0981 | 968 | static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr) |
a75beee6 ED |
969 | { |
970 | int i; | |
971 | ||
8b9cf98c | 972 | i = __find_msr_index(vmx, msr); |
a75beee6 | 973 | if (i >= 0) |
a2fa3e9f | 974 | return &vmx->guest_msrs[i]; |
8b6d44c7 | 975 | return NULL; |
7725f0ba AK |
976 | } |
977 | ||
6aa8b732 AK |
978 | static void vmcs_clear(struct vmcs *vmcs) |
979 | { | |
980 | u64 phys_addr = __pa(vmcs); | |
981 | u8 error; | |
982 | ||
4ecac3fd | 983 | asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0" |
16d8f72f | 984 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
6aa8b732 AK |
985 | : "cc", "memory"); |
986 | if (error) | |
987 | printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n", | |
988 | vmcs, phys_addr); | |
989 | } | |
990 | ||
d462b819 NHE |
991 | static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs) |
992 | { | |
993 | vmcs_clear(loaded_vmcs->vmcs); | |
994 | loaded_vmcs->cpu = -1; | |
995 | loaded_vmcs->launched = 0; | |
996 | } | |
997 | ||
7725b894 DX |
998 | static void vmcs_load(struct vmcs *vmcs) |
999 | { | |
1000 | u64 phys_addr = __pa(vmcs); | |
1001 | u8 error; | |
1002 | ||
1003 | asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0" | |
16d8f72f | 1004 | : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr) |
7725b894 DX |
1005 | : "cc", "memory"); |
1006 | if (error) | |
2844d849 | 1007 | printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n", |
7725b894 DX |
1008 | vmcs, phys_addr); |
1009 | } | |
1010 | ||
8f536b76 ZY |
1011 | #ifdef CONFIG_KEXEC |
1012 | /* | |
1013 | * This bitmap is used to indicate whether the vmclear | |
1014 | * operation is enabled on all cpus. All disabled by | |
1015 | * default. | |
1016 | */ | |
1017 | static cpumask_t crash_vmclear_enabled_bitmap = CPU_MASK_NONE; | |
1018 | ||
1019 | static inline void crash_enable_local_vmclear(int cpu) | |
1020 | { | |
1021 | cpumask_set_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
1022 | } | |
1023 | ||
1024 | static inline void crash_disable_local_vmclear(int cpu) | |
1025 | { | |
1026 | cpumask_clear_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
1027 | } | |
1028 | ||
1029 | static inline int crash_local_vmclear_enabled(int cpu) | |
1030 | { | |
1031 | return cpumask_test_cpu(cpu, &crash_vmclear_enabled_bitmap); | |
1032 | } | |
1033 | ||
1034 | static void crash_vmclear_local_loaded_vmcss(void) | |
1035 | { | |
1036 | int cpu = raw_smp_processor_id(); | |
1037 | struct loaded_vmcs *v; | |
1038 | ||
1039 | if (!crash_local_vmclear_enabled(cpu)) | |
1040 | return; | |
1041 | ||
1042 | list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu), | |
1043 | loaded_vmcss_on_cpu_link) | |
1044 | vmcs_clear(v->vmcs); | |
1045 | } | |
1046 | #else | |
1047 | static inline void crash_enable_local_vmclear(int cpu) { } | |
1048 | static inline void crash_disable_local_vmclear(int cpu) { } | |
1049 | #endif /* CONFIG_KEXEC */ | |
1050 | ||
d462b819 | 1051 | static void __loaded_vmcs_clear(void *arg) |
6aa8b732 | 1052 | { |
d462b819 | 1053 | struct loaded_vmcs *loaded_vmcs = arg; |
d3b2c338 | 1054 | int cpu = raw_smp_processor_id(); |
6aa8b732 | 1055 | |
d462b819 NHE |
1056 | if (loaded_vmcs->cpu != cpu) |
1057 | return; /* vcpu migration can race with cpu offline */ | |
1058 | if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs) | |
6aa8b732 | 1059 | per_cpu(current_vmcs, cpu) = NULL; |
8f536b76 | 1060 | crash_disable_local_vmclear(cpu); |
d462b819 | 1061 | list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link); |
5a560f8b XG |
1062 | |
1063 | /* | |
1064 | * we should ensure updating loaded_vmcs->loaded_vmcss_on_cpu_link | |
1065 | * is before setting loaded_vmcs->vcpu to -1 which is done in | |
1066 | * loaded_vmcs_init. Otherwise, other cpu can see vcpu = -1 fist | |
1067 | * then adds the vmcs into percpu list before it is deleted. | |
1068 | */ | |
1069 | smp_wmb(); | |
1070 | ||
d462b819 | 1071 | loaded_vmcs_init(loaded_vmcs); |
8f536b76 | 1072 | crash_enable_local_vmclear(cpu); |
6aa8b732 AK |
1073 | } |
1074 | ||
d462b819 | 1075 | static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs) |
8d0be2b3 | 1076 | { |
e6c7d321 XG |
1077 | int cpu = loaded_vmcs->cpu; |
1078 | ||
1079 | if (cpu != -1) | |
1080 | smp_call_function_single(cpu, | |
1081 | __loaded_vmcs_clear, loaded_vmcs, 1); | |
8d0be2b3 AK |
1082 | } |
1083 | ||
1760dd49 | 1084 | static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx) |
2384d2b3 SY |
1085 | { |
1086 | if (vmx->vpid == 0) | |
1087 | return; | |
1088 | ||
518c8aee GJ |
1089 | if (cpu_has_vmx_invvpid_single()) |
1090 | __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0); | |
2384d2b3 SY |
1091 | } |
1092 | ||
b9d762fa GJ |
1093 | static inline void vpid_sync_vcpu_global(void) |
1094 | { | |
1095 | if (cpu_has_vmx_invvpid_global()) | |
1096 | __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0); | |
1097 | } | |
1098 | ||
1099 | static inline void vpid_sync_context(struct vcpu_vmx *vmx) | |
1100 | { | |
1101 | if (cpu_has_vmx_invvpid_single()) | |
1760dd49 | 1102 | vpid_sync_vcpu_single(vmx); |
b9d762fa GJ |
1103 | else |
1104 | vpid_sync_vcpu_global(); | |
1105 | } | |
1106 | ||
1439442c SY |
1107 | static inline void ept_sync_global(void) |
1108 | { | |
1109 | if (cpu_has_vmx_invept_global()) | |
1110 | __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0); | |
1111 | } | |
1112 | ||
1113 | static inline void ept_sync_context(u64 eptp) | |
1114 | { | |
089d034e | 1115 | if (enable_ept) { |
1439442c SY |
1116 | if (cpu_has_vmx_invept_context()) |
1117 | __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0); | |
1118 | else | |
1119 | ept_sync_global(); | |
1120 | } | |
1121 | } | |
1122 | ||
96304217 | 1123 | static __always_inline unsigned long vmcs_readl(unsigned long field) |
6aa8b732 | 1124 | { |
5e520e62 | 1125 | unsigned long value; |
6aa8b732 | 1126 | |
5e520e62 AK |
1127 | asm volatile (__ex_clear(ASM_VMX_VMREAD_RDX_RAX, "%0") |
1128 | : "=a"(value) : "d"(field) : "cc"); | |
6aa8b732 AK |
1129 | return value; |
1130 | } | |
1131 | ||
96304217 | 1132 | static __always_inline u16 vmcs_read16(unsigned long field) |
6aa8b732 AK |
1133 | { |
1134 | return vmcs_readl(field); | |
1135 | } | |
1136 | ||
96304217 | 1137 | static __always_inline u32 vmcs_read32(unsigned long field) |
6aa8b732 AK |
1138 | { |
1139 | return vmcs_readl(field); | |
1140 | } | |
1141 | ||
96304217 | 1142 | static __always_inline u64 vmcs_read64(unsigned long field) |
6aa8b732 | 1143 | { |
05b3e0c2 | 1144 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1145 | return vmcs_readl(field); |
1146 | #else | |
1147 | return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32); | |
1148 | #endif | |
1149 | } | |
1150 | ||
e52de1b8 AK |
1151 | static noinline void vmwrite_error(unsigned long field, unsigned long value) |
1152 | { | |
1153 | printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", | |
1154 | field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
1155 | dump_stack(); | |
1156 | } | |
1157 | ||
6aa8b732 AK |
1158 | static void vmcs_writel(unsigned long field, unsigned long value) |
1159 | { | |
1160 | u8 error; | |
1161 | ||
4ecac3fd | 1162 | asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0" |
d77c26fc | 1163 | : "=q"(error) : "a"(value), "d"(field) : "cc"); |
e52de1b8 AK |
1164 | if (unlikely(error)) |
1165 | vmwrite_error(field, value); | |
6aa8b732 AK |
1166 | } |
1167 | ||
1168 | static void vmcs_write16(unsigned long field, u16 value) | |
1169 | { | |
1170 | vmcs_writel(field, value); | |
1171 | } | |
1172 | ||
1173 | static void vmcs_write32(unsigned long field, u32 value) | |
1174 | { | |
1175 | vmcs_writel(field, value); | |
1176 | } | |
1177 | ||
1178 | static void vmcs_write64(unsigned long field, u64 value) | |
1179 | { | |
6aa8b732 | 1180 | vmcs_writel(field, value); |
7682f2d0 | 1181 | #ifndef CONFIG_X86_64 |
6aa8b732 AK |
1182 | asm volatile (""); |
1183 | vmcs_writel(field+1, value >> 32); | |
1184 | #endif | |
1185 | } | |
1186 | ||
2ab455cc AL |
1187 | static void vmcs_clear_bits(unsigned long field, u32 mask) |
1188 | { | |
1189 | vmcs_writel(field, vmcs_readl(field) & ~mask); | |
1190 | } | |
1191 | ||
1192 | static void vmcs_set_bits(unsigned long field, u32 mask) | |
1193 | { | |
1194 | vmcs_writel(field, vmcs_readl(field) | mask); | |
1195 | } | |
1196 | ||
2fb92db1 AK |
1197 | static void vmx_segment_cache_clear(struct vcpu_vmx *vmx) |
1198 | { | |
1199 | vmx->segment_cache.bitmask = 0; | |
1200 | } | |
1201 | ||
1202 | static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg, | |
1203 | unsigned field) | |
1204 | { | |
1205 | bool ret; | |
1206 | u32 mask = 1 << (seg * SEG_FIELD_NR + field); | |
1207 | ||
1208 | if (!(vmx->vcpu.arch.regs_avail & (1 << VCPU_EXREG_SEGMENTS))) { | |
1209 | vmx->vcpu.arch.regs_avail |= (1 << VCPU_EXREG_SEGMENTS); | |
1210 | vmx->segment_cache.bitmask = 0; | |
1211 | } | |
1212 | ret = vmx->segment_cache.bitmask & mask; | |
1213 | vmx->segment_cache.bitmask |= mask; | |
1214 | return ret; | |
1215 | } | |
1216 | ||
1217 | static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg) | |
1218 | { | |
1219 | u16 *p = &vmx->segment_cache.seg[seg].selector; | |
1220 | ||
1221 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL)) | |
1222 | *p = vmcs_read16(kvm_vmx_segment_fields[seg].selector); | |
1223 | return *p; | |
1224 | } | |
1225 | ||
1226 | static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg) | |
1227 | { | |
1228 | ulong *p = &vmx->segment_cache.seg[seg].base; | |
1229 | ||
1230 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE)) | |
1231 | *p = vmcs_readl(kvm_vmx_segment_fields[seg].base); | |
1232 | return *p; | |
1233 | } | |
1234 | ||
1235 | static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg) | |
1236 | { | |
1237 | u32 *p = &vmx->segment_cache.seg[seg].limit; | |
1238 | ||
1239 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT)) | |
1240 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].limit); | |
1241 | return *p; | |
1242 | } | |
1243 | ||
1244 | static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg) | |
1245 | { | |
1246 | u32 *p = &vmx->segment_cache.seg[seg].ar; | |
1247 | ||
1248 | if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR)) | |
1249 | *p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes); | |
1250 | return *p; | |
1251 | } | |
1252 | ||
abd3f2d6 AK |
1253 | static void update_exception_bitmap(struct kvm_vcpu *vcpu) |
1254 | { | |
1255 | u32 eb; | |
1256 | ||
fd7373cc JK |
1257 | eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) | |
1258 | (1u << NM_VECTOR) | (1u << DB_VECTOR); | |
1259 | if ((vcpu->guest_debug & | |
1260 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) == | |
1261 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) | |
1262 | eb |= 1u << BP_VECTOR; | |
7ffd92c5 | 1263 | if (to_vmx(vcpu)->rmode.vm86_active) |
abd3f2d6 | 1264 | eb = ~0; |
089d034e | 1265 | if (enable_ept) |
1439442c | 1266 | eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */ |
02daab21 AK |
1267 | if (vcpu->fpu_active) |
1268 | eb &= ~(1u << NM_VECTOR); | |
36cf24e0 NHE |
1269 | |
1270 | /* When we are running a nested L2 guest and L1 specified for it a | |
1271 | * certain exception bitmap, we must trap the same exceptions and pass | |
1272 | * them to L1. When running L2, we will only handle the exceptions | |
1273 | * specified above if L1 did not want them. | |
1274 | */ | |
1275 | if (is_guest_mode(vcpu)) | |
1276 | eb |= get_vmcs12(vcpu)->exception_bitmap; | |
1277 | ||
abd3f2d6 AK |
1278 | vmcs_write32(EXCEPTION_BITMAP, eb); |
1279 | } | |
1280 | ||
8bf00a52 GN |
1281 | static void clear_atomic_switch_msr_special(unsigned long entry, |
1282 | unsigned long exit) | |
1283 | { | |
1284 | vmcs_clear_bits(VM_ENTRY_CONTROLS, entry); | |
1285 | vmcs_clear_bits(VM_EXIT_CONTROLS, exit); | |
1286 | } | |
1287 | ||
61d2ef2c AK |
1288 | static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr) |
1289 | { | |
1290 | unsigned i; | |
1291 | struct msr_autoload *m = &vmx->msr_autoload; | |
1292 | ||
8bf00a52 GN |
1293 | switch (msr) { |
1294 | case MSR_EFER: | |
1295 | if (cpu_has_load_ia32_efer) { | |
1296 | clear_atomic_switch_msr_special(VM_ENTRY_LOAD_IA32_EFER, | |
1297 | VM_EXIT_LOAD_IA32_EFER); | |
1298 | return; | |
1299 | } | |
1300 | break; | |
1301 | case MSR_CORE_PERF_GLOBAL_CTRL: | |
1302 | if (cpu_has_load_perf_global_ctrl) { | |
1303 | clear_atomic_switch_msr_special( | |
1304 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, | |
1305 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); | |
1306 | return; | |
1307 | } | |
1308 | break; | |
110312c8 AK |
1309 | } |
1310 | ||
61d2ef2c AK |
1311 | for (i = 0; i < m->nr; ++i) |
1312 | if (m->guest[i].index == msr) | |
1313 | break; | |
1314 | ||
1315 | if (i == m->nr) | |
1316 | return; | |
1317 | --m->nr; | |
1318 | m->guest[i] = m->guest[m->nr]; | |
1319 | m->host[i] = m->host[m->nr]; | |
1320 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
1321 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
1322 | } | |
1323 | ||
8bf00a52 GN |
1324 | static void add_atomic_switch_msr_special(unsigned long entry, |
1325 | unsigned long exit, unsigned long guest_val_vmcs, | |
1326 | unsigned long host_val_vmcs, u64 guest_val, u64 host_val) | |
1327 | { | |
1328 | vmcs_write64(guest_val_vmcs, guest_val); | |
1329 | vmcs_write64(host_val_vmcs, host_val); | |
1330 | vmcs_set_bits(VM_ENTRY_CONTROLS, entry); | |
1331 | vmcs_set_bits(VM_EXIT_CONTROLS, exit); | |
1332 | } | |
1333 | ||
61d2ef2c AK |
1334 | static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, |
1335 | u64 guest_val, u64 host_val) | |
1336 | { | |
1337 | unsigned i; | |
1338 | struct msr_autoload *m = &vmx->msr_autoload; | |
1339 | ||
8bf00a52 GN |
1340 | switch (msr) { |
1341 | case MSR_EFER: | |
1342 | if (cpu_has_load_ia32_efer) { | |
1343 | add_atomic_switch_msr_special(VM_ENTRY_LOAD_IA32_EFER, | |
1344 | VM_EXIT_LOAD_IA32_EFER, | |
1345 | GUEST_IA32_EFER, | |
1346 | HOST_IA32_EFER, | |
1347 | guest_val, host_val); | |
1348 | return; | |
1349 | } | |
1350 | break; | |
1351 | case MSR_CORE_PERF_GLOBAL_CTRL: | |
1352 | if (cpu_has_load_perf_global_ctrl) { | |
1353 | add_atomic_switch_msr_special( | |
1354 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, | |
1355 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL, | |
1356 | GUEST_IA32_PERF_GLOBAL_CTRL, | |
1357 | HOST_IA32_PERF_GLOBAL_CTRL, | |
1358 | guest_val, host_val); | |
1359 | return; | |
1360 | } | |
1361 | break; | |
110312c8 AK |
1362 | } |
1363 | ||
61d2ef2c AK |
1364 | for (i = 0; i < m->nr; ++i) |
1365 | if (m->guest[i].index == msr) | |
1366 | break; | |
1367 | ||
e7fc6f93 GN |
1368 | if (i == NR_AUTOLOAD_MSRS) { |
1369 | printk_once(KERN_WARNING"Not enough mst switch entries. " | |
1370 | "Can't add msr %x\n", msr); | |
1371 | return; | |
1372 | } else if (i == m->nr) { | |
61d2ef2c AK |
1373 | ++m->nr; |
1374 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); | |
1375 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); | |
1376 | } | |
1377 | ||
1378 | m->guest[i].index = msr; | |
1379 | m->guest[i].value = guest_val; | |
1380 | m->host[i].index = msr; | |
1381 | m->host[i].value = host_val; | |
1382 | } | |
1383 | ||
33ed6329 AK |
1384 | static void reload_tss(void) |
1385 | { | |
33ed6329 AK |
1386 | /* |
1387 | * VT restores TR but not its size. Useless. | |
1388 | */ | |
d359192f | 1389 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
a5f61300 | 1390 | struct desc_struct *descs; |
33ed6329 | 1391 | |
d359192f | 1392 | descs = (void *)gdt->address; |
33ed6329 AK |
1393 | descs[GDT_ENTRY_TSS].type = 9; /* available TSS */ |
1394 | load_TR_desc(); | |
33ed6329 AK |
1395 | } |
1396 | ||
92c0d900 | 1397 | static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset) |
2cc51560 | 1398 | { |
3a34a881 | 1399 | u64 guest_efer; |
51c6cf66 AK |
1400 | u64 ignore_bits; |
1401 | ||
f6801dff | 1402 | guest_efer = vmx->vcpu.arch.efer; |
3a34a881 | 1403 | |
51c6cf66 | 1404 | /* |
0fa06071 | 1405 | * NX is emulated; LMA and LME handled by hardware; SCE meaningless |
51c6cf66 AK |
1406 | * outside long mode |
1407 | */ | |
1408 | ignore_bits = EFER_NX | EFER_SCE; | |
1409 | #ifdef CONFIG_X86_64 | |
1410 | ignore_bits |= EFER_LMA | EFER_LME; | |
1411 | /* SCE is meaningful only in long mode on Intel */ | |
1412 | if (guest_efer & EFER_LMA) | |
1413 | ignore_bits &= ~(u64)EFER_SCE; | |
1414 | #endif | |
51c6cf66 AK |
1415 | guest_efer &= ~ignore_bits; |
1416 | guest_efer |= host_efer & ignore_bits; | |
26bb0981 | 1417 | vmx->guest_msrs[efer_offset].data = guest_efer; |
d5696725 | 1418 | vmx->guest_msrs[efer_offset].mask = ~ignore_bits; |
84ad33ef AK |
1419 | |
1420 | clear_atomic_switch_msr(vmx, MSR_EFER); | |
1421 | /* On ept, can't emulate nx, and must switch nx atomically */ | |
1422 | if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) { | |
1423 | guest_efer = vmx->vcpu.arch.efer; | |
1424 | if (!(guest_efer & EFER_LMA)) | |
1425 | guest_efer &= ~EFER_LME; | |
1426 | add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer); | |
1427 | return false; | |
1428 | } | |
1429 | ||
26bb0981 | 1430 | return true; |
51c6cf66 AK |
1431 | } |
1432 | ||
2d49ec72 GN |
1433 | static unsigned long segment_base(u16 selector) |
1434 | { | |
d359192f | 1435 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
2d49ec72 GN |
1436 | struct desc_struct *d; |
1437 | unsigned long table_base; | |
1438 | unsigned long v; | |
1439 | ||
1440 | if (!(selector & ~3)) | |
1441 | return 0; | |
1442 | ||
d359192f | 1443 | table_base = gdt->address; |
2d49ec72 GN |
1444 | |
1445 | if (selector & 4) { /* from ldt */ | |
1446 | u16 ldt_selector = kvm_read_ldt(); | |
1447 | ||
1448 | if (!(ldt_selector & ~3)) | |
1449 | return 0; | |
1450 | ||
1451 | table_base = segment_base(ldt_selector); | |
1452 | } | |
1453 | d = (struct desc_struct *)(table_base + (selector & ~7)); | |
1454 | v = get_desc_base(d); | |
1455 | #ifdef CONFIG_X86_64 | |
1456 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) | |
1457 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
1458 | #endif | |
1459 | return v; | |
1460 | } | |
1461 | ||
1462 | static inline unsigned long kvm_read_tr_base(void) | |
1463 | { | |
1464 | u16 tr; | |
1465 | asm("str %0" : "=g"(tr)); | |
1466 | return segment_base(tr); | |
1467 | } | |
1468 | ||
04d2cc77 | 1469 | static void vmx_save_host_state(struct kvm_vcpu *vcpu) |
33ed6329 | 1470 | { |
04d2cc77 | 1471 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 1472 | int i; |
04d2cc77 | 1473 | |
a2fa3e9f | 1474 | if (vmx->host_state.loaded) |
33ed6329 AK |
1475 | return; |
1476 | ||
a2fa3e9f | 1477 | vmx->host_state.loaded = 1; |
33ed6329 AK |
1478 | /* |
1479 | * Set host fs and gs selectors. Unfortunately, 22.2.3 does not | |
1480 | * allow segment selectors with cpl > 0 or ti == 1. | |
1481 | */ | |
d6e88aec | 1482 | vmx->host_state.ldt_sel = kvm_read_ldt(); |
152d3f2f | 1483 | vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel; |
9581d442 | 1484 | savesegment(fs, vmx->host_state.fs_sel); |
152d3f2f | 1485 | if (!(vmx->host_state.fs_sel & 7)) { |
a2fa3e9f | 1486 | vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel); |
152d3f2f LV |
1487 | vmx->host_state.fs_reload_needed = 0; |
1488 | } else { | |
33ed6329 | 1489 | vmcs_write16(HOST_FS_SELECTOR, 0); |
152d3f2f | 1490 | vmx->host_state.fs_reload_needed = 1; |
33ed6329 | 1491 | } |
9581d442 | 1492 | savesegment(gs, vmx->host_state.gs_sel); |
a2fa3e9f GH |
1493 | if (!(vmx->host_state.gs_sel & 7)) |
1494 | vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel); | |
33ed6329 AK |
1495 | else { |
1496 | vmcs_write16(HOST_GS_SELECTOR, 0); | |
152d3f2f | 1497 | vmx->host_state.gs_ldt_reload_needed = 1; |
33ed6329 AK |
1498 | } |
1499 | ||
b2da15ac AK |
1500 | #ifdef CONFIG_X86_64 |
1501 | savesegment(ds, vmx->host_state.ds_sel); | |
1502 | savesegment(es, vmx->host_state.es_sel); | |
1503 | #endif | |
1504 | ||
33ed6329 AK |
1505 | #ifdef CONFIG_X86_64 |
1506 | vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE)); | |
1507 | vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE)); | |
1508 | #else | |
a2fa3e9f GH |
1509 | vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel)); |
1510 | vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel)); | |
33ed6329 | 1511 | #endif |
707c0874 AK |
1512 | |
1513 | #ifdef CONFIG_X86_64 | |
c8770e7b AK |
1514 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
1515 | if (is_long_mode(&vmx->vcpu)) | |
44ea2b17 | 1516 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); |
707c0874 | 1517 | #endif |
26bb0981 AK |
1518 | for (i = 0; i < vmx->save_nmsrs; ++i) |
1519 | kvm_set_shared_msr(vmx->guest_msrs[i].index, | |
d5696725 AK |
1520 | vmx->guest_msrs[i].data, |
1521 | vmx->guest_msrs[i].mask); | |
33ed6329 AK |
1522 | } |
1523 | ||
a9b21b62 | 1524 | static void __vmx_load_host_state(struct vcpu_vmx *vmx) |
33ed6329 | 1525 | { |
a2fa3e9f | 1526 | if (!vmx->host_state.loaded) |
33ed6329 AK |
1527 | return; |
1528 | ||
e1beb1d3 | 1529 | ++vmx->vcpu.stat.host_state_reload; |
a2fa3e9f | 1530 | vmx->host_state.loaded = 0; |
c8770e7b AK |
1531 | #ifdef CONFIG_X86_64 |
1532 | if (is_long_mode(&vmx->vcpu)) | |
1533 | rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base); | |
1534 | #endif | |
152d3f2f | 1535 | if (vmx->host_state.gs_ldt_reload_needed) { |
d6e88aec | 1536 | kvm_load_ldt(vmx->host_state.ldt_sel); |
33ed6329 | 1537 | #ifdef CONFIG_X86_64 |
9581d442 | 1538 | load_gs_index(vmx->host_state.gs_sel); |
9581d442 AK |
1539 | #else |
1540 | loadsegment(gs, vmx->host_state.gs_sel); | |
33ed6329 | 1541 | #endif |
33ed6329 | 1542 | } |
0a77fe4c AK |
1543 | if (vmx->host_state.fs_reload_needed) |
1544 | loadsegment(fs, vmx->host_state.fs_sel); | |
b2da15ac AK |
1545 | #ifdef CONFIG_X86_64 |
1546 | if (unlikely(vmx->host_state.ds_sel | vmx->host_state.es_sel)) { | |
1547 | loadsegment(ds, vmx->host_state.ds_sel); | |
1548 | loadsegment(es, vmx->host_state.es_sel); | |
1549 | } | |
b2da15ac | 1550 | #endif |
152d3f2f | 1551 | reload_tss(); |
44ea2b17 | 1552 | #ifdef CONFIG_X86_64 |
c8770e7b | 1553 | wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base); |
44ea2b17 | 1554 | #endif |
b1a74bf8 SS |
1555 | /* |
1556 | * If the FPU is not active (through the host task or | |
1557 | * the guest vcpu), then restore the cr0.TS bit. | |
1558 | */ | |
1559 | if (!user_has_fpu() && !vmx->vcpu.guest_fpu_loaded) | |
1560 | stts(); | |
3444d7da | 1561 | load_gdt(&__get_cpu_var(host_gdt)); |
33ed6329 AK |
1562 | } |
1563 | ||
a9b21b62 AK |
1564 | static void vmx_load_host_state(struct vcpu_vmx *vmx) |
1565 | { | |
1566 | preempt_disable(); | |
1567 | __vmx_load_host_state(vmx); | |
1568 | preempt_enable(); | |
1569 | } | |
1570 | ||
6aa8b732 AK |
1571 | /* |
1572 | * Switches to specified vcpu, until a matching vcpu_put(), but assumes | |
1573 | * vcpu mutex is already taken. | |
1574 | */ | |
15ad7146 | 1575 | static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 1576 | { |
a2fa3e9f | 1577 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4610c9cc | 1578 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); |
6aa8b732 | 1579 | |
4610c9cc DX |
1580 | if (!vmm_exclusive) |
1581 | kvm_cpu_vmxon(phys_addr); | |
d462b819 NHE |
1582 | else if (vmx->loaded_vmcs->cpu != cpu) |
1583 | loaded_vmcs_clear(vmx->loaded_vmcs); | |
6aa8b732 | 1584 | |
d462b819 NHE |
1585 | if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) { |
1586 | per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs; | |
1587 | vmcs_load(vmx->loaded_vmcs->vmcs); | |
6aa8b732 AK |
1588 | } |
1589 | ||
d462b819 | 1590 | if (vmx->loaded_vmcs->cpu != cpu) { |
d359192f | 1591 | struct desc_ptr *gdt = &__get_cpu_var(host_gdt); |
6aa8b732 AK |
1592 | unsigned long sysenter_esp; |
1593 | ||
a8eeb04a | 1594 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
92fe13be | 1595 | local_irq_disable(); |
8f536b76 | 1596 | crash_disable_local_vmclear(cpu); |
5a560f8b XG |
1597 | |
1598 | /* | |
1599 | * Read loaded_vmcs->cpu should be before fetching | |
1600 | * loaded_vmcs->loaded_vmcss_on_cpu_link. | |
1601 | * See the comments in __loaded_vmcs_clear(). | |
1602 | */ | |
1603 | smp_rmb(); | |
1604 | ||
d462b819 NHE |
1605 | list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link, |
1606 | &per_cpu(loaded_vmcss_on_cpu, cpu)); | |
8f536b76 | 1607 | crash_enable_local_vmclear(cpu); |
92fe13be DX |
1608 | local_irq_enable(); |
1609 | ||
6aa8b732 AK |
1610 | /* |
1611 | * Linux uses per-cpu TSS and GDT, so set these when switching | |
1612 | * processors. | |
1613 | */ | |
d6e88aec | 1614 | vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */ |
d359192f | 1615 | vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */ |
6aa8b732 AK |
1616 | |
1617 | rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp); | |
1618 | vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */ | |
d462b819 | 1619 | vmx->loaded_vmcs->cpu = cpu; |
6aa8b732 | 1620 | } |
6aa8b732 AK |
1621 | } |
1622 | ||
1623 | static void vmx_vcpu_put(struct kvm_vcpu *vcpu) | |
1624 | { | |
a9b21b62 | 1625 | __vmx_load_host_state(to_vmx(vcpu)); |
4610c9cc | 1626 | if (!vmm_exclusive) { |
d462b819 NHE |
1627 | __loaded_vmcs_clear(to_vmx(vcpu)->loaded_vmcs); |
1628 | vcpu->cpu = -1; | |
4610c9cc DX |
1629 | kvm_cpu_vmxoff(); |
1630 | } | |
6aa8b732 AK |
1631 | } |
1632 | ||
5fd86fcf AK |
1633 | static void vmx_fpu_activate(struct kvm_vcpu *vcpu) |
1634 | { | |
81231c69 AK |
1635 | ulong cr0; |
1636 | ||
5fd86fcf AK |
1637 | if (vcpu->fpu_active) |
1638 | return; | |
1639 | vcpu->fpu_active = 1; | |
81231c69 AK |
1640 | cr0 = vmcs_readl(GUEST_CR0); |
1641 | cr0 &= ~(X86_CR0_TS | X86_CR0_MP); | |
1642 | cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP); | |
1643 | vmcs_writel(GUEST_CR0, cr0); | |
5fd86fcf | 1644 | update_exception_bitmap(vcpu); |
edcafe3c | 1645 | vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS; |
36cf24e0 NHE |
1646 | if (is_guest_mode(vcpu)) |
1647 | vcpu->arch.cr0_guest_owned_bits &= | |
1648 | ~get_vmcs12(vcpu)->cr0_guest_host_mask; | |
edcafe3c | 1649 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); |
5fd86fcf AK |
1650 | } |
1651 | ||
edcafe3c AK |
1652 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu); |
1653 | ||
fe3ef05c NHE |
1654 | /* |
1655 | * Return the cr0 value that a nested guest would read. This is a combination | |
1656 | * of the real cr0 used to run the guest (guest_cr0), and the bits shadowed by | |
1657 | * its hypervisor (cr0_read_shadow). | |
1658 | */ | |
1659 | static inline unsigned long nested_read_cr0(struct vmcs12 *fields) | |
1660 | { | |
1661 | return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) | | |
1662 | (fields->cr0_read_shadow & fields->cr0_guest_host_mask); | |
1663 | } | |
1664 | static inline unsigned long nested_read_cr4(struct vmcs12 *fields) | |
1665 | { | |
1666 | return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) | | |
1667 | (fields->cr4_read_shadow & fields->cr4_guest_host_mask); | |
1668 | } | |
1669 | ||
5fd86fcf AK |
1670 | static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu) |
1671 | { | |
36cf24e0 NHE |
1672 | /* Note that there is no vcpu->fpu_active = 0 here. The caller must |
1673 | * set this *before* calling this function. | |
1674 | */ | |
edcafe3c | 1675 | vmx_decache_cr0_guest_bits(vcpu); |
81231c69 | 1676 | vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP); |
5fd86fcf | 1677 | update_exception_bitmap(vcpu); |
edcafe3c AK |
1678 | vcpu->arch.cr0_guest_owned_bits = 0; |
1679 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
36cf24e0 NHE |
1680 | if (is_guest_mode(vcpu)) { |
1681 | /* | |
1682 | * L1's specified read shadow might not contain the TS bit, | |
1683 | * so now that we turned on shadowing of this bit, we need to | |
1684 | * set this bit of the shadow. Like in nested_vmx_run we need | |
1685 | * nested_read_cr0(vmcs12), but vmcs12->guest_cr0 is not yet | |
1686 | * up-to-date here because we just decached cr0.TS (and we'll | |
1687 | * only update vmcs12->guest_cr0 on nested exit). | |
1688 | */ | |
1689 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
1690 | vmcs12->guest_cr0 = (vmcs12->guest_cr0 & ~X86_CR0_TS) | | |
1691 | (vcpu->arch.cr0 & X86_CR0_TS); | |
1692 | vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12)); | |
1693 | } else | |
1694 | vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0); | |
5fd86fcf AK |
1695 | } |
1696 | ||
6aa8b732 AK |
1697 | static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu) |
1698 | { | |
78ac8b47 | 1699 | unsigned long rflags, save_rflags; |
345dcaa8 | 1700 | |
6de12732 AK |
1701 | if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) { |
1702 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); | |
1703 | rflags = vmcs_readl(GUEST_RFLAGS); | |
1704 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
1705 | rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS; | |
1706 | save_rflags = to_vmx(vcpu)->rmode.save_rflags; | |
1707 | rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
1708 | } | |
1709 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 | 1710 | } |
6de12732 | 1711 | return to_vmx(vcpu)->rflags; |
6aa8b732 AK |
1712 | } |
1713 | ||
1714 | static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
1715 | { | |
6de12732 AK |
1716 | __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail); |
1717 | to_vmx(vcpu)->rflags = rflags; | |
78ac8b47 AK |
1718 | if (to_vmx(vcpu)->rmode.vm86_active) { |
1719 | to_vmx(vcpu)->rmode.save_rflags = rflags; | |
053de044 | 1720 | rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
78ac8b47 | 1721 | } |
6aa8b732 AK |
1722 | vmcs_writel(GUEST_RFLAGS, rflags); |
1723 | } | |
1724 | ||
2809f5d2 GC |
1725 | static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
1726 | { | |
1727 | u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
1728 | int ret = 0; | |
1729 | ||
1730 | if (interruptibility & GUEST_INTR_STATE_STI) | |
48005f64 | 1731 | ret |= KVM_X86_SHADOW_INT_STI; |
2809f5d2 | 1732 | if (interruptibility & GUEST_INTR_STATE_MOV_SS) |
48005f64 | 1733 | ret |= KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 GC |
1734 | |
1735 | return ret & mask; | |
1736 | } | |
1737 | ||
1738 | static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
1739 | { | |
1740 | u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
1741 | u32 interruptibility = interruptibility_old; | |
1742 | ||
1743 | interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS); | |
1744 | ||
48005f64 | 1745 | if (mask & KVM_X86_SHADOW_INT_MOV_SS) |
2809f5d2 | 1746 | interruptibility |= GUEST_INTR_STATE_MOV_SS; |
48005f64 | 1747 | else if (mask & KVM_X86_SHADOW_INT_STI) |
2809f5d2 GC |
1748 | interruptibility |= GUEST_INTR_STATE_STI; |
1749 | ||
1750 | if ((interruptibility != interruptibility_old)) | |
1751 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility); | |
1752 | } | |
1753 | ||
6aa8b732 AK |
1754 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
1755 | { | |
1756 | unsigned long rip; | |
6aa8b732 | 1757 | |
5fdbf976 | 1758 | rip = kvm_rip_read(vcpu); |
6aa8b732 | 1759 | rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN); |
5fdbf976 | 1760 | kvm_rip_write(vcpu, rip); |
6aa8b732 | 1761 | |
2809f5d2 GC |
1762 | /* skipping an emulated instruction also counts */ |
1763 | vmx_set_interrupt_shadow(vcpu, 0); | |
6aa8b732 AK |
1764 | } |
1765 | ||
0b6ac343 NHE |
1766 | /* |
1767 | * KVM wants to inject page-faults which it got to the guest. This function | |
1768 | * checks whether in a nested guest, we need to inject them to L1 or L2. | |
1769 | * This function assumes it is called with the exit reason in vmcs02 being | |
1770 | * a #PF exception (this is the only case in which KVM injects a #PF when L2 | |
1771 | * is running). | |
1772 | */ | |
1773 | static int nested_pf_handled(struct kvm_vcpu *vcpu) | |
1774 | { | |
1775 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
1776 | ||
1777 | /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */ | |
95871901 | 1778 | if (!(vmcs12->exception_bitmap & (1u << PF_VECTOR))) |
0b6ac343 NHE |
1779 | return 0; |
1780 | ||
1781 | nested_vmx_vmexit(vcpu); | |
1782 | return 1; | |
1783 | } | |
1784 | ||
298101da | 1785 | static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
1786 | bool has_error_code, u32 error_code, |
1787 | bool reinject) | |
298101da | 1788 | { |
77ab6db0 | 1789 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
8ab2d2e2 | 1790 | u32 intr_info = nr | INTR_INFO_VALID_MASK; |
77ab6db0 | 1791 | |
0b6ac343 NHE |
1792 | if (nr == PF_VECTOR && is_guest_mode(vcpu) && |
1793 | nested_pf_handled(vcpu)) | |
1794 | return; | |
1795 | ||
8ab2d2e2 | 1796 | if (has_error_code) { |
77ab6db0 | 1797 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code); |
8ab2d2e2 JK |
1798 | intr_info |= INTR_INFO_DELIVER_CODE_MASK; |
1799 | } | |
77ab6db0 | 1800 | |
7ffd92c5 | 1801 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
1802 | int inc_eip = 0; |
1803 | if (kvm_exception_is_soft(nr)) | |
1804 | inc_eip = vcpu->arch.event_exit_inst_len; | |
1805 | if (kvm_inject_realmode_interrupt(vcpu, nr, inc_eip) != EMULATE_DONE) | |
a92601bb | 1806 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
77ab6db0 JK |
1807 | return; |
1808 | } | |
1809 | ||
66fd3f7f GN |
1810 | if (kvm_exception_is_soft(nr)) { |
1811 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
1812 | vmx->vcpu.arch.event_exit_inst_len); | |
8ab2d2e2 JK |
1813 | intr_info |= INTR_TYPE_SOFT_EXCEPTION; |
1814 | } else | |
1815 | intr_info |= INTR_TYPE_HARD_EXCEPTION; | |
1816 | ||
1817 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info); | |
298101da AK |
1818 | } |
1819 | ||
4e47c7a6 SY |
1820 | static bool vmx_rdtscp_supported(void) |
1821 | { | |
1822 | return cpu_has_vmx_rdtscp(); | |
1823 | } | |
1824 | ||
ad756a16 MJ |
1825 | static bool vmx_invpcid_supported(void) |
1826 | { | |
1827 | return cpu_has_vmx_invpcid() && enable_ept; | |
1828 | } | |
1829 | ||
a75beee6 ED |
1830 | /* |
1831 | * Swap MSR entry in host/guest MSR entry array. | |
1832 | */ | |
8b9cf98c | 1833 | static void move_msr_up(struct vcpu_vmx *vmx, int from, int to) |
a75beee6 | 1834 | { |
26bb0981 | 1835 | struct shared_msr_entry tmp; |
a2fa3e9f GH |
1836 | |
1837 | tmp = vmx->guest_msrs[to]; | |
1838 | vmx->guest_msrs[to] = vmx->guest_msrs[from]; | |
1839 | vmx->guest_msrs[from] = tmp; | |
a75beee6 ED |
1840 | } |
1841 | ||
8d14695f YZ |
1842 | static void vmx_set_msr_bitmap(struct kvm_vcpu *vcpu) |
1843 | { | |
1844 | unsigned long *msr_bitmap; | |
1845 | ||
1846 | if (irqchip_in_kernel(vcpu->kvm) && apic_x2apic_mode(vcpu->arch.apic)) { | |
1847 | if (is_long_mode(vcpu)) | |
1848 | msr_bitmap = vmx_msr_bitmap_longmode_x2apic; | |
1849 | else | |
1850 | msr_bitmap = vmx_msr_bitmap_legacy_x2apic; | |
1851 | } else { | |
1852 | if (is_long_mode(vcpu)) | |
1853 | msr_bitmap = vmx_msr_bitmap_longmode; | |
1854 | else | |
1855 | msr_bitmap = vmx_msr_bitmap_legacy; | |
1856 | } | |
1857 | ||
1858 | vmcs_write64(MSR_BITMAP, __pa(msr_bitmap)); | |
1859 | } | |
1860 | ||
e38aea3e AK |
1861 | /* |
1862 | * Set up the vmcs to automatically save and restore system | |
1863 | * msrs. Don't touch the 64-bit msrs if the guest is in legacy | |
1864 | * mode, as fiddling with msrs is very expensive. | |
1865 | */ | |
8b9cf98c | 1866 | static void setup_msrs(struct vcpu_vmx *vmx) |
e38aea3e | 1867 | { |
26bb0981 | 1868 | int save_nmsrs, index; |
e38aea3e | 1869 | |
a75beee6 ED |
1870 | save_nmsrs = 0; |
1871 | #ifdef CONFIG_X86_64 | |
8b9cf98c | 1872 | if (is_long_mode(&vmx->vcpu)) { |
8b9cf98c | 1873 | index = __find_msr_index(vmx, MSR_SYSCALL_MASK); |
a75beee6 | 1874 | if (index >= 0) |
8b9cf98c RR |
1875 | move_msr_up(vmx, index, save_nmsrs++); |
1876 | index = __find_msr_index(vmx, MSR_LSTAR); | |
a75beee6 | 1877 | if (index >= 0) |
8b9cf98c RR |
1878 | move_msr_up(vmx, index, save_nmsrs++); |
1879 | index = __find_msr_index(vmx, MSR_CSTAR); | |
a75beee6 | 1880 | if (index >= 0) |
8b9cf98c | 1881 | move_msr_up(vmx, index, save_nmsrs++); |
4e47c7a6 SY |
1882 | index = __find_msr_index(vmx, MSR_TSC_AUX); |
1883 | if (index >= 0 && vmx->rdtscp_enabled) | |
1884 | move_msr_up(vmx, index, save_nmsrs++); | |
a75beee6 | 1885 | /* |
8c06585d | 1886 | * MSR_STAR is only needed on long mode guests, and only |
a75beee6 ED |
1887 | * if efer.sce is enabled. |
1888 | */ | |
8c06585d | 1889 | index = __find_msr_index(vmx, MSR_STAR); |
f6801dff | 1890 | if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE)) |
8b9cf98c | 1891 | move_msr_up(vmx, index, save_nmsrs++); |
a75beee6 ED |
1892 | } |
1893 | #endif | |
92c0d900 AK |
1894 | index = __find_msr_index(vmx, MSR_EFER); |
1895 | if (index >= 0 && update_transition_efer(vmx, index)) | |
26bb0981 | 1896 | move_msr_up(vmx, index, save_nmsrs++); |
e38aea3e | 1897 | |
26bb0981 | 1898 | vmx->save_nmsrs = save_nmsrs; |
5897297b | 1899 | |
8d14695f YZ |
1900 | if (cpu_has_vmx_msr_bitmap()) |
1901 | vmx_set_msr_bitmap(&vmx->vcpu); | |
e38aea3e AK |
1902 | } |
1903 | ||
6aa8b732 AK |
1904 | /* |
1905 | * reads and returns guest's timestamp counter "register" | |
1906 | * guest_tsc = host_tsc + tsc_offset -- 21.3 | |
1907 | */ | |
1908 | static u64 guest_read_tsc(void) | |
1909 | { | |
1910 | u64 host_tsc, tsc_offset; | |
1911 | ||
1912 | rdtscll(host_tsc); | |
1913 | tsc_offset = vmcs_read64(TSC_OFFSET); | |
1914 | return host_tsc + tsc_offset; | |
1915 | } | |
1916 | ||
d5c1785d NHE |
1917 | /* |
1918 | * Like guest_read_tsc, but always returns L1's notion of the timestamp | |
1919 | * counter, even if a nested guest (L2) is currently running. | |
1920 | */ | |
886b470c | 1921 | u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc) |
d5c1785d | 1922 | { |
886b470c | 1923 | u64 tsc_offset; |
d5c1785d | 1924 | |
d5c1785d NHE |
1925 | tsc_offset = is_guest_mode(vcpu) ? |
1926 | to_vmx(vcpu)->nested.vmcs01_tsc_offset : | |
1927 | vmcs_read64(TSC_OFFSET); | |
1928 | return host_tsc + tsc_offset; | |
1929 | } | |
1930 | ||
4051b188 | 1931 | /* |
cc578287 ZA |
1932 | * Engage any workarounds for mis-matched TSC rates. Currently limited to |
1933 | * software catchup for faster rates on slower CPUs. | |
4051b188 | 1934 | */ |
cc578287 | 1935 | static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale) |
4051b188 | 1936 | { |
cc578287 ZA |
1937 | if (!scale) |
1938 | return; | |
1939 | ||
1940 | if (user_tsc_khz > tsc_khz) { | |
1941 | vcpu->arch.tsc_catchup = 1; | |
1942 | vcpu->arch.tsc_always_catchup = 1; | |
1943 | } else | |
1944 | WARN(1, "user requested TSC rate below hardware speed\n"); | |
4051b188 JR |
1945 | } |
1946 | ||
ba904635 WA |
1947 | static u64 vmx_read_tsc_offset(struct kvm_vcpu *vcpu) |
1948 | { | |
1949 | return vmcs_read64(TSC_OFFSET); | |
1950 | } | |
1951 | ||
6aa8b732 | 1952 | /* |
99e3e30a | 1953 | * writes 'offset' into guest's timestamp counter offset register |
6aa8b732 | 1954 | */ |
99e3e30a | 1955 | static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
6aa8b732 | 1956 | { |
27fc51b2 | 1957 | if (is_guest_mode(vcpu)) { |
7991825b | 1958 | /* |
27fc51b2 NHE |
1959 | * We're here if L1 chose not to trap WRMSR to TSC. According |
1960 | * to the spec, this should set L1's TSC; The offset that L1 | |
1961 | * set for L2 remains unchanged, and still needs to be added | |
1962 | * to the newly set TSC to get L2's TSC. | |
7991825b | 1963 | */ |
27fc51b2 NHE |
1964 | struct vmcs12 *vmcs12; |
1965 | to_vmx(vcpu)->nested.vmcs01_tsc_offset = offset; | |
1966 | /* recalculate vmcs02.TSC_OFFSET: */ | |
1967 | vmcs12 = get_vmcs12(vcpu); | |
1968 | vmcs_write64(TSC_OFFSET, offset + | |
1969 | (nested_cpu_has(vmcs12, CPU_BASED_USE_TSC_OFFSETING) ? | |
1970 | vmcs12->tsc_offset : 0)); | |
1971 | } else { | |
1972 | vmcs_write64(TSC_OFFSET, offset); | |
1973 | } | |
6aa8b732 AK |
1974 | } |
1975 | ||
f1e2b260 | 1976 | static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host) |
e48672fa ZA |
1977 | { |
1978 | u64 offset = vmcs_read64(TSC_OFFSET); | |
1979 | vmcs_write64(TSC_OFFSET, offset + adjustment); | |
7991825b NHE |
1980 | if (is_guest_mode(vcpu)) { |
1981 | /* Even when running L2, the adjustment needs to apply to L1 */ | |
1982 | to_vmx(vcpu)->nested.vmcs01_tsc_offset += adjustment; | |
1983 | } | |
e48672fa ZA |
1984 | } |
1985 | ||
857e4099 JR |
1986 | static u64 vmx_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc) |
1987 | { | |
1988 | return target_tsc - native_read_tsc(); | |
1989 | } | |
1990 | ||
801d3424 NHE |
1991 | static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu) |
1992 | { | |
1993 | struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 1, 0); | |
1994 | return best && (best->ecx & (1 << (X86_FEATURE_VMX & 31))); | |
1995 | } | |
1996 | ||
1997 | /* | |
1998 | * nested_vmx_allowed() checks whether a guest should be allowed to use VMX | |
1999 | * instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for | |
2000 | * all guests if the "nested" module option is off, and can also be disabled | |
2001 | * for a single guest by disabling its VMX cpuid bit. | |
2002 | */ | |
2003 | static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu) | |
2004 | { | |
2005 | return nested && guest_cpuid_has_vmx(vcpu); | |
2006 | } | |
2007 | ||
b87a51ae NHE |
2008 | /* |
2009 | * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be | |
2010 | * returned for the various VMX controls MSRs when nested VMX is enabled. | |
2011 | * The same values should also be used to verify that vmcs12 control fields are | |
2012 | * valid during nested entry from L1 to L2. | |
2013 | * Each of these control msrs has a low and high 32-bit half: A low bit is on | |
2014 | * if the corresponding bit in the (32-bit) control field *must* be on, and a | |
2015 | * bit in the high half is on if the corresponding bit in the control field | |
2016 | * may be on. See also vmx_control_verify(). | |
2017 | * TODO: allow these variables to be modified (downgraded) by module options | |
2018 | * or other means. | |
2019 | */ | |
2020 | static u32 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high; | |
2021 | static u32 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high; | |
2022 | static u32 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high; | |
2023 | static u32 nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high; | |
2024 | static u32 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high; | |
2025 | static __init void nested_vmx_setup_ctls_msrs(void) | |
2026 | { | |
2027 | /* | |
2028 | * Note that as a general rule, the high half of the MSRs (bits in | |
2029 | * the control fields which may be 1) should be initialized by the | |
2030 | * intersection of the underlying hardware's MSR (i.e., features which | |
2031 | * can be supported) and the list of features we want to expose - | |
2032 | * because they are known to be properly supported in our code. | |
2033 | * Also, usually, the low half of the MSRs (bits which must be 1) can | |
2034 | * be set to 0, meaning that L1 may turn off any of these bits. The | |
2035 | * reason is that if one of these bits is necessary, it will appear | |
2036 | * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control | |
2037 | * fields of vmcs01 and vmcs02, will turn these bits off - and | |
2038 | * nested_vmx_exit_handled() will not pass related exits to L1. | |
2039 | * These rules have exceptions below. | |
2040 | */ | |
2041 | ||
2042 | /* pin-based controls */ | |
2043 | /* | |
2044 | * According to the Intel spec, if bit 55 of VMX_BASIC is off (as it is | |
2045 | * in our case), bits 1, 2 and 4 (i.e., 0x16) must be 1 in this MSR. | |
2046 | */ | |
2047 | nested_vmx_pinbased_ctls_low = 0x16 ; | |
2048 | nested_vmx_pinbased_ctls_high = 0x16 | | |
2049 | PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING | | |
2050 | PIN_BASED_VIRTUAL_NMIS; | |
2051 | ||
2052 | /* exit controls */ | |
2053 | nested_vmx_exit_ctls_low = 0; | |
b6f1250e | 2054 | /* Note that guest use of VM_EXIT_ACK_INTR_ON_EXIT is not supported. */ |
b87a51ae NHE |
2055 | #ifdef CONFIG_X86_64 |
2056 | nested_vmx_exit_ctls_high = VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
2057 | #else | |
2058 | nested_vmx_exit_ctls_high = 0; | |
2059 | #endif | |
2060 | ||
2061 | /* entry controls */ | |
2062 | rdmsr(MSR_IA32_VMX_ENTRY_CTLS, | |
2063 | nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high); | |
2064 | nested_vmx_entry_ctls_low = 0; | |
2065 | nested_vmx_entry_ctls_high &= | |
2066 | VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_IA32E_MODE; | |
2067 | ||
2068 | /* cpu-based controls */ | |
2069 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, | |
2070 | nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high); | |
2071 | nested_vmx_procbased_ctls_low = 0; | |
2072 | nested_vmx_procbased_ctls_high &= | |
2073 | CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_USE_TSC_OFFSETING | | |
2074 | CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING | | |
2075 | CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING | | |
2076 | CPU_BASED_CR3_STORE_EXITING | | |
2077 | #ifdef CONFIG_X86_64 | |
2078 | CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING | | |
2079 | #endif | |
2080 | CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING | | |
2081 | CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_EXITING | | |
dbcb4e79 | 2082 | CPU_BASED_RDPMC_EXITING | CPU_BASED_RDTSC_EXITING | |
d6851fbe | 2083 | CPU_BASED_PAUSE_EXITING | |
b87a51ae NHE |
2084 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
2085 | /* | |
2086 | * We can allow some features even when not supported by the | |
2087 | * hardware. For example, L1 can specify an MSR bitmap - and we | |
2088 | * can use it to avoid exits to L1 - even when L0 runs L2 | |
2089 | * without MSR bitmaps. | |
2090 | */ | |
2091 | nested_vmx_procbased_ctls_high |= CPU_BASED_USE_MSR_BITMAPS; | |
2092 | ||
2093 | /* secondary cpu-based controls */ | |
2094 | rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2, | |
2095 | nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high); | |
2096 | nested_vmx_secondary_ctls_low = 0; | |
2097 | nested_vmx_secondary_ctls_high &= | |
d6851fbe JK |
2098 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | |
2099 | SECONDARY_EXEC_WBINVD_EXITING; | |
b87a51ae NHE |
2100 | } |
2101 | ||
2102 | static inline bool vmx_control_verify(u32 control, u32 low, u32 high) | |
2103 | { | |
2104 | /* | |
2105 | * Bits 0 in high must be 0, and bits 1 in low must be 1. | |
2106 | */ | |
2107 | return ((control & high) | low) == control; | |
2108 | } | |
2109 | ||
2110 | static inline u64 vmx_control_msr(u32 low, u32 high) | |
2111 | { | |
2112 | return low | ((u64)high << 32); | |
2113 | } | |
2114 | ||
2115 | /* | |
2116 | * If we allow our guest to use VMX instructions (i.e., nested VMX), we should | |
2117 | * also let it use VMX-specific MSRs. | |
2118 | * vmx_get_vmx_msr() and vmx_set_vmx_msr() return 1 when we handled a | |
2119 | * VMX-specific MSR, or 0 when we haven't (and the caller should handle it | |
2120 | * like all other MSRs). | |
2121 | */ | |
2122 | static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
2123 | { | |
2124 | if (!nested_vmx_allowed(vcpu) && msr_index >= MSR_IA32_VMX_BASIC && | |
2125 | msr_index <= MSR_IA32_VMX_TRUE_ENTRY_CTLS) { | |
2126 | /* | |
2127 | * According to the spec, processors which do not support VMX | |
2128 | * should throw a #GP(0) when VMX capability MSRs are read. | |
2129 | */ | |
2130 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
2131 | return 1; | |
2132 | } | |
2133 | ||
2134 | switch (msr_index) { | |
2135 | case MSR_IA32_FEATURE_CONTROL: | |
2136 | *pdata = 0; | |
2137 | break; | |
2138 | case MSR_IA32_VMX_BASIC: | |
2139 | /* | |
2140 | * This MSR reports some information about VMX support. We | |
2141 | * should return information about the VMX we emulate for the | |
2142 | * guest, and the VMCS structure we give it - not about the | |
2143 | * VMX support of the underlying hardware. | |
2144 | */ | |
2145 | *pdata = VMCS12_REVISION | | |
2146 | ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) | | |
2147 | (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT); | |
2148 | break; | |
2149 | case MSR_IA32_VMX_TRUE_PINBASED_CTLS: | |
2150 | case MSR_IA32_VMX_PINBASED_CTLS: | |
2151 | *pdata = vmx_control_msr(nested_vmx_pinbased_ctls_low, | |
2152 | nested_vmx_pinbased_ctls_high); | |
2153 | break; | |
2154 | case MSR_IA32_VMX_TRUE_PROCBASED_CTLS: | |
2155 | case MSR_IA32_VMX_PROCBASED_CTLS: | |
2156 | *pdata = vmx_control_msr(nested_vmx_procbased_ctls_low, | |
2157 | nested_vmx_procbased_ctls_high); | |
2158 | break; | |
2159 | case MSR_IA32_VMX_TRUE_EXIT_CTLS: | |
2160 | case MSR_IA32_VMX_EXIT_CTLS: | |
2161 | *pdata = vmx_control_msr(nested_vmx_exit_ctls_low, | |
2162 | nested_vmx_exit_ctls_high); | |
2163 | break; | |
2164 | case MSR_IA32_VMX_TRUE_ENTRY_CTLS: | |
2165 | case MSR_IA32_VMX_ENTRY_CTLS: | |
2166 | *pdata = vmx_control_msr(nested_vmx_entry_ctls_low, | |
2167 | nested_vmx_entry_ctls_high); | |
2168 | break; | |
2169 | case MSR_IA32_VMX_MISC: | |
2170 | *pdata = 0; | |
2171 | break; | |
2172 | /* | |
2173 | * These MSRs specify bits which the guest must keep fixed (on or off) | |
2174 | * while L1 is in VMXON mode (in L1's root mode, or running an L2). | |
2175 | * We picked the standard core2 setting. | |
2176 | */ | |
2177 | #define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE) | |
2178 | #define VMXON_CR4_ALWAYSON X86_CR4_VMXE | |
2179 | case MSR_IA32_VMX_CR0_FIXED0: | |
2180 | *pdata = VMXON_CR0_ALWAYSON; | |
2181 | break; | |
2182 | case MSR_IA32_VMX_CR0_FIXED1: | |
2183 | *pdata = -1ULL; | |
2184 | break; | |
2185 | case MSR_IA32_VMX_CR4_FIXED0: | |
2186 | *pdata = VMXON_CR4_ALWAYSON; | |
2187 | break; | |
2188 | case MSR_IA32_VMX_CR4_FIXED1: | |
2189 | *pdata = -1ULL; | |
2190 | break; | |
2191 | case MSR_IA32_VMX_VMCS_ENUM: | |
2192 | *pdata = 0x1f; | |
2193 | break; | |
2194 | case MSR_IA32_VMX_PROCBASED_CTLS2: | |
2195 | *pdata = vmx_control_msr(nested_vmx_secondary_ctls_low, | |
2196 | nested_vmx_secondary_ctls_high); | |
2197 | break; | |
2198 | case MSR_IA32_VMX_EPT_VPID_CAP: | |
2199 | /* Currently, no nested ept or nested vpid */ | |
2200 | *pdata = 0; | |
2201 | break; | |
2202 | default: | |
2203 | return 0; | |
2204 | } | |
2205 | ||
2206 | return 1; | |
2207 | } | |
2208 | ||
2209 | static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
2210 | { | |
2211 | if (!nested_vmx_allowed(vcpu)) | |
2212 | return 0; | |
2213 | ||
2214 | if (msr_index == MSR_IA32_FEATURE_CONTROL) | |
2215 | /* TODO: the right thing. */ | |
2216 | return 1; | |
2217 | /* | |
2218 | * No need to treat VMX capability MSRs specially: If we don't handle | |
2219 | * them, handle_wrmsr will #GP(0), which is correct (they are readonly) | |
2220 | */ | |
2221 | return 0; | |
2222 | } | |
2223 | ||
6aa8b732 AK |
2224 | /* |
2225 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
2226 | * Returns 0 on success, non-0 otherwise. | |
2227 | * Assumes vcpu_load() was already called. | |
2228 | */ | |
2229 | static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
2230 | { | |
2231 | u64 data; | |
26bb0981 | 2232 | struct shared_msr_entry *msr; |
6aa8b732 AK |
2233 | |
2234 | if (!pdata) { | |
2235 | printk(KERN_ERR "BUG: get_msr called with NULL pdata\n"); | |
2236 | return -EINVAL; | |
2237 | } | |
2238 | ||
2239 | switch (msr_index) { | |
05b3e0c2 | 2240 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2241 | case MSR_FS_BASE: |
2242 | data = vmcs_readl(GUEST_FS_BASE); | |
2243 | break; | |
2244 | case MSR_GS_BASE: | |
2245 | data = vmcs_readl(GUEST_GS_BASE); | |
2246 | break; | |
44ea2b17 AK |
2247 | case MSR_KERNEL_GS_BASE: |
2248 | vmx_load_host_state(to_vmx(vcpu)); | |
2249 | data = to_vmx(vcpu)->msr_guest_kernel_gs_base; | |
2250 | break; | |
26bb0981 | 2251 | #endif |
6aa8b732 | 2252 | case MSR_EFER: |
3bab1f5d | 2253 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
af24a4e4 | 2254 | case MSR_IA32_TSC: |
6aa8b732 AK |
2255 | data = guest_read_tsc(); |
2256 | break; | |
2257 | case MSR_IA32_SYSENTER_CS: | |
2258 | data = vmcs_read32(GUEST_SYSENTER_CS); | |
2259 | break; | |
2260 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 2261 | data = vmcs_readl(GUEST_SYSENTER_EIP); |
6aa8b732 AK |
2262 | break; |
2263 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 2264 | data = vmcs_readl(GUEST_SYSENTER_ESP); |
6aa8b732 | 2265 | break; |
4e47c7a6 SY |
2266 | case MSR_TSC_AUX: |
2267 | if (!to_vmx(vcpu)->rdtscp_enabled) | |
2268 | return 1; | |
2269 | /* Otherwise falls through */ | |
6aa8b732 | 2270 | default: |
b87a51ae NHE |
2271 | if (vmx_get_vmx_msr(vcpu, msr_index, pdata)) |
2272 | return 0; | |
8b9cf98c | 2273 | msr = find_msr_entry(to_vmx(vcpu), msr_index); |
3bab1f5d AK |
2274 | if (msr) { |
2275 | data = msr->data; | |
2276 | break; | |
6aa8b732 | 2277 | } |
3bab1f5d | 2278 | return kvm_get_msr_common(vcpu, msr_index, pdata); |
6aa8b732 AK |
2279 | } |
2280 | ||
2281 | *pdata = data; | |
2282 | return 0; | |
2283 | } | |
2284 | ||
2285 | /* | |
2286 | * Writes msr value into into the appropriate "register". | |
2287 | * Returns 0 on success, non-0 otherwise. | |
2288 | * Assumes vcpu_load() was already called. | |
2289 | */ | |
8fe8ab46 | 2290 | static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) |
6aa8b732 | 2291 | { |
a2fa3e9f | 2292 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
26bb0981 | 2293 | struct shared_msr_entry *msr; |
2cc51560 | 2294 | int ret = 0; |
8fe8ab46 WA |
2295 | u32 msr_index = msr_info->index; |
2296 | u64 data = msr_info->data; | |
2cc51560 | 2297 | |
6aa8b732 | 2298 | switch (msr_index) { |
3bab1f5d | 2299 | case MSR_EFER: |
8fe8ab46 | 2300 | ret = kvm_set_msr_common(vcpu, msr_info); |
2cc51560 | 2301 | break; |
16175a79 | 2302 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2303 | case MSR_FS_BASE: |
2fb92db1 | 2304 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
2305 | vmcs_writel(GUEST_FS_BASE, data); |
2306 | break; | |
2307 | case MSR_GS_BASE: | |
2fb92db1 | 2308 | vmx_segment_cache_clear(vmx); |
6aa8b732 AK |
2309 | vmcs_writel(GUEST_GS_BASE, data); |
2310 | break; | |
44ea2b17 AK |
2311 | case MSR_KERNEL_GS_BASE: |
2312 | vmx_load_host_state(vmx); | |
2313 | vmx->msr_guest_kernel_gs_base = data; | |
2314 | break; | |
6aa8b732 AK |
2315 | #endif |
2316 | case MSR_IA32_SYSENTER_CS: | |
2317 | vmcs_write32(GUEST_SYSENTER_CS, data); | |
2318 | break; | |
2319 | case MSR_IA32_SYSENTER_EIP: | |
f5b42c33 | 2320 | vmcs_writel(GUEST_SYSENTER_EIP, data); |
6aa8b732 AK |
2321 | break; |
2322 | case MSR_IA32_SYSENTER_ESP: | |
f5b42c33 | 2323 | vmcs_writel(GUEST_SYSENTER_ESP, data); |
6aa8b732 | 2324 | break; |
af24a4e4 | 2325 | case MSR_IA32_TSC: |
8fe8ab46 | 2326 | kvm_write_tsc(vcpu, msr_info); |
6aa8b732 | 2327 | break; |
468d472f SY |
2328 | case MSR_IA32_CR_PAT: |
2329 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { | |
2330 | vmcs_write64(GUEST_IA32_PAT, data); | |
2331 | vcpu->arch.pat = data; | |
2332 | break; | |
2333 | } | |
8fe8ab46 | 2334 | ret = kvm_set_msr_common(vcpu, msr_info); |
4e47c7a6 | 2335 | break; |
ba904635 WA |
2336 | case MSR_IA32_TSC_ADJUST: |
2337 | ret = kvm_set_msr_common(vcpu, msr_info); | |
4e47c7a6 SY |
2338 | break; |
2339 | case MSR_TSC_AUX: | |
2340 | if (!vmx->rdtscp_enabled) | |
2341 | return 1; | |
2342 | /* Check reserved bit, higher 32 bits should be zero */ | |
2343 | if ((data >> 32) != 0) | |
2344 | return 1; | |
2345 | /* Otherwise falls through */ | |
6aa8b732 | 2346 | default: |
b87a51ae NHE |
2347 | if (vmx_set_vmx_msr(vcpu, msr_index, data)) |
2348 | break; | |
8b9cf98c | 2349 | msr = find_msr_entry(vmx, msr_index); |
3bab1f5d AK |
2350 | if (msr) { |
2351 | msr->data = data; | |
2225fd56 AK |
2352 | if (msr - vmx->guest_msrs < vmx->save_nmsrs) { |
2353 | preempt_disable(); | |
9ee73970 AK |
2354 | kvm_set_shared_msr(msr->index, msr->data, |
2355 | msr->mask); | |
2225fd56 AK |
2356 | preempt_enable(); |
2357 | } | |
3bab1f5d | 2358 | break; |
6aa8b732 | 2359 | } |
8fe8ab46 | 2360 | ret = kvm_set_msr_common(vcpu, msr_info); |
6aa8b732 AK |
2361 | } |
2362 | ||
2cc51560 | 2363 | return ret; |
6aa8b732 AK |
2364 | } |
2365 | ||
5fdbf976 | 2366 | static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
6aa8b732 | 2367 | { |
5fdbf976 MT |
2368 | __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail); |
2369 | switch (reg) { | |
2370 | case VCPU_REGS_RSP: | |
2371 | vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP); | |
2372 | break; | |
2373 | case VCPU_REGS_RIP: | |
2374 | vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP); | |
2375 | break; | |
6de4f3ad AK |
2376 | case VCPU_EXREG_PDPTR: |
2377 | if (enable_ept) | |
2378 | ept_save_pdptrs(vcpu); | |
2379 | break; | |
5fdbf976 MT |
2380 | default: |
2381 | break; | |
2382 | } | |
6aa8b732 AK |
2383 | } |
2384 | ||
6aa8b732 AK |
2385 | static __init int cpu_has_kvm_support(void) |
2386 | { | |
6210e37b | 2387 | return cpu_has_vmx(); |
6aa8b732 AK |
2388 | } |
2389 | ||
2390 | static __init int vmx_disabled_by_bios(void) | |
2391 | { | |
2392 | u64 msr; | |
2393 | ||
2394 | rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); | |
cafd6659 | 2395 | if (msr & FEATURE_CONTROL_LOCKED) { |
23f3e991 | 2396 | /* launched w/ TXT and VMX disabled */ |
cafd6659 SW |
2397 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
2398 | && tboot_enabled()) | |
2399 | return 1; | |
23f3e991 | 2400 | /* launched w/o TXT and VMX only enabled w/ TXT */ |
cafd6659 | 2401 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) |
23f3e991 | 2402 | && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) |
f9335afe SW |
2403 | && !tboot_enabled()) { |
2404 | printk(KERN_WARNING "kvm: disable TXT in the BIOS or " | |
23f3e991 | 2405 | "activate TXT before enabling KVM\n"); |
cafd6659 | 2406 | return 1; |
f9335afe | 2407 | } |
23f3e991 JC |
2408 | /* launched w/o TXT and VMX disabled */ |
2409 | if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) | |
2410 | && !tboot_enabled()) | |
2411 | return 1; | |
cafd6659 SW |
2412 | } |
2413 | ||
2414 | return 0; | |
6aa8b732 AK |
2415 | } |
2416 | ||
7725b894 DX |
2417 | static void kvm_cpu_vmxon(u64 addr) |
2418 | { | |
2419 | asm volatile (ASM_VMX_VMXON_RAX | |
2420 | : : "a"(&addr), "m"(addr) | |
2421 | : "memory", "cc"); | |
2422 | } | |
2423 | ||
10474ae8 | 2424 | static int hardware_enable(void *garbage) |
6aa8b732 AK |
2425 | { |
2426 | int cpu = raw_smp_processor_id(); | |
2427 | u64 phys_addr = __pa(per_cpu(vmxarea, cpu)); | |
cafd6659 | 2428 | u64 old, test_bits; |
6aa8b732 | 2429 | |
10474ae8 AG |
2430 | if (read_cr4() & X86_CR4_VMXE) |
2431 | return -EBUSY; | |
2432 | ||
d462b819 | 2433 | INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu)); |
8f536b76 ZY |
2434 | |
2435 | /* | |
2436 | * Now we can enable the vmclear operation in kdump | |
2437 | * since the loaded_vmcss_on_cpu list on this cpu | |
2438 | * has been initialized. | |
2439 | * | |
2440 | * Though the cpu is not in VMX operation now, there | |
2441 | * is no problem to enable the vmclear operation | |
2442 | * for the loaded_vmcss_on_cpu list is empty! | |
2443 | */ | |
2444 | crash_enable_local_vmclear(cpu); | |
2445 | ||
6aa8b732 | 2446 | rdmsrl(MSR_IA32_FEATURE_CONTROL, old); |
cafd6659 SW |
2447 | |
2448 | test_bits = FEATURE_CONTROL_LOCKED; | |
2449 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX; | |
2450 | if (tboot_enabled()) | |
2451 | test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX; | |
2452 | ||
2453 | if ((old & test_bits) != test_bits) { | |
6aa8b732 | 2454 | /* enable and lock */ |
cafd6659 SW |
2455 | wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits); |
2456 | } | |
66aee91a | 2457 | write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */ |
10474ae8 | 2458 | |
4610c9cc DX |
2459 | if (vmm_exclusive) { |
2460 | kvm_cpu_vmxon(phys_addr); | |
2461 | ept_sync_global(); | |
2462 | } | |
10474ae8 | 2463 | |
3444d7da AK |
2464 | store_gdt(&__get_cpu_var(host_gdt)); |
2465 | ||
10474ae8 | 2466 | return 0; |
6aa8b732 AK |
2467 | } |
2468 | ||
d462b819 | 2469 | static void vmclear_local_loaded_vmcss(void) |
543e4243 AK |
2470 | { |
2471 | int cpu = raw_smp_processor_id(); | |
d462b819 | 2472 | struct loaded_vmcs *v, *n; |
543e4243 | 2473 | |
d462b819 NHE |
2474 | list_for_each_entry_safe(v, n, &per_cpu(loaded_vmcss_on_cpu, cpu), |
2475 | loaded_vmcss_on_cpu_link) | |
2476 | __loaded_vmcs_clear(v); | |
543e4243 AK |
2477 | } |
2478 | ||
710ff4a8 EH |
2479 | |
2480 | /* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot() | |
2481 | * tricks. | |
2482 | */ | |
2483 | static void kvm_cpu_vmxoff(void) | |
6aa8b732 | 2484 | { |
4ecac3fd | 2485 | asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc"); |
6aa8b732 AK |
2486 | } |
2487 | ||
710ff4a8 EH |
2488 | static void hardware_disable(void *garbage) |
2489 | { | |
4610c9cc | 2490 | if (vmm_exclusive) { |
d462b819 | 2491 | vmclear_local_loaded_vmcss(); |
4610c9cc DX |
2492 | kvm_cpu_vmxoff(); |
2493 | } | |
7725b894 | 2494 | write_cr4(read_cr4() & ~X86_CR4_VMXE); |
710ff4a8 EH |
2495 | } |
2496 | ||
1c3d14fe | 2497 | static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt, |
d77c26fc | 2498 | u32 msr, u32 *result) |
1c3d14fe YS |
2499 | { |
2500 | u32 vmx_msr_low, vmx_msr_high; | |
2501 | u32 ctl = ctl_min | ctl_opt; | |
2502 | ||
2503 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
2504 | ||
2505 | ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */ | |
2506 | ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */ | |
2507 | ||
2508 | /* Ensure minimum (required) set of control bits are supported. */ | |
2509 | if (ctl_min & ~ctl) | |
002c7f7c | 2510 | return -EIO; |
1c3d14fe YS |
2511 | |
2512 | *result = ctl; | |
2513 | return 0; | |
2514 | } | |
2515 | ||
110312c8 AK |
2516 | static __init bool allow_1_setting(u32 msr, u32 ctl) |
2517 | { | |
2518 | u32 vmx_msr_low, vmx_msr_high; | |
2519 | ||
2520 | rdmsr(msr, vmx_msr_low, vmx_msr_high); | |
2521 | return vmx_msr_high & ctl; | |
2522 | } | |
2523 | ||
002c7f7c | 2524 | static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf) |
6aa8b732 AK |
2525 | { |
2526 | u32 vmx_msr_low, vmx_msr_high; | |
d56f546d | 2527 | u32 min, opt, min2, opt2; |
1c3d14fe YS |
2528 | u32 _pin_based_exec_control = 0; |
2529 | u32 _cpu_based_exec_control = 0; | |
f78e0e2e | 2530 | u32 _cpu_based_2nd_exec_control = 0; |
1c3d14fe YS |
2531 | u32 _vmexit_control = 0; |
2532 | u32 _vmentry_control = 0; | |
2533 | ||
2534 | min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING; | |
f08864b4 | 2535 | opt = PIN_BASED_VIRTUAL_NMIS; |
1c3d14fe YS |
2536 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS, |
2537 | &_pin_based_exec_control) < 0) | |
002c7f7c | 2538 | return -EIO; |
1c3d14fe | 2539 | |
10166744 | 2540 | min = CPU_BASED_HLT_EXITING | |
1c3d14fe YS |
2541 | #ifdef CONFIG_X86_64 |
2542 | CPU_BASED_CR8_LOAD_EXITING | | |
2543 | CPU_BASED_CR8_STORE_EXITING | | |
2544 | #endif | |
d56f546d SY |
2545 | CPU_BASED_CR3_LOAD_EXITING | |
2546 | CPU_BASED_CR3_STORE_EXITING | | |
1c3d14fe YS |
2547 | CPU_BASED_USE_IO_BITMAPS | |
2548 | CPU_BASED_MOV_DR_EXITING | | |
a7052897 | 2549 | CPU_BASED_USE_TSC_OFFSETING | |
59708670 SY |
2550 | CPU_BASED_MWAIT_EXITING | |
2551 | CPU_BASED_MONITOR_EXITING | | |
fee84b07 AK |
2552 | CPU_BASED_INVLPG_EXITING | |
2553 | CPU_BASED_RDPMC_EXITING; | |
443381a8 | 2554 | |
f78e0e2e | 2555 | opt = CPU_BASED_TPR_SHADOW | |
25c5f225 | 2556 | CPU_BASED_USE_MSR_BITMAPS | |
f78e0e2e | 2557 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; |
1c3d14fe YS |
2558 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS, |
2559 | &_cpu_based_exec_control) < 0) | |
002c7f7c | 2560 | return -EIO; |
6e5d865c YS |
2561 | #ifdef CONFIG_X86_64 |
2562 | if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
2563 | _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING & | |
2564 | ~CPU_BASED_CR8_STORE_EXITING; | |
2565 | #endif | |
f78e0e2e | 2566 | if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) { |
d56f546d SY |
2567 | min2 = 0; |
2568 | opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | | |
8d14695f | 2569 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
2384d2b3 | 2570 | SECONDARY_EXEC_WBINVD_EXITING | |
d56f546d | 2571 | SECONDARY_EXEC_ENABLE_VPID | |
3a624e29 | 2572 | SECONDARY_EXEC_ENABLE_EPT | |
4b8d54f9 | 2573 | SECONDARY_EXEC_UNRESTRICTED_GUEST | |
4e47c7a6 | 2574 | SECONDARY_EXEC_PAUSE_LOOP_EXITING | |
ad756a16 | 2575 | SECONDARY_EXEC_RDTSCP | |
83d4c286 | 2576 | SECONDARY_EXEC_ENABLE_INVPCID | |
c7c9c56c YZ |
2577 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
2578 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; | |
d56f546d SY |
2579 | if (adjust_vmx_controls(min2, opt2, |
2580 | MSR_IA32_VMX_PROCBASED_CTLS2, | |
f78e0e2e SY |
2581 | &_cpu_based_2nd_exec_control) < 0) |
2582 | return -EIO; | |
2583 | } | |
2584 | #ifndef CONFIG_X86_64 | |
2585 | if (!(_cpu_based_2nd_exec_control & | |
2586 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)) | |
2587 | _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW; | |
2588 | #endif | |
83d4c286 YZ |
2589 | |
2590 | if (!(_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)) | |
2591 | _cpu_based_2nd_exec_control &= ~( | |
8d14695f | 2592 | SECONDARY_EXEC_APIC_REGISTER_VIRT | |
c7c9c56c YZ |
2593 | SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE | |
2594 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
83d4c286 | 2595 | |
d56f546d | 2596 | if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) { |
a7052897 MT |
2597 | /* CR3 accesses and invlpg don't need to cause VM Exits when EPT |
2598 | enabled */ | |
5fff7d27 GN |
2599 | _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING | |
2600 | CPU_BASED_CR3_STORE_EXITING | | |
2601 | CPU_BASED_INVLPG_EXITING); | |
d56f546d SY |
2602 | rdmsr(MSR_IA32_VMX_EPT_VPID_CAP, |
2603 | vmx_capability.ept, vmx_capability.vpid); | |
2604 | } | |
1c3d14fe YS |
2605 | |
2606 | min = 0; | |
2607 | #ifdef CONFIG_X86_64 | |
2608 | min |= VM_EXIT_HOST_ADDR_SPACE_SIZE; | |
2609 | #endif | |
468d472f | 2610 | opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT; |
1c3d14fe YS |
2611 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS, |
2612 | &_vmexit_control) < 0) | |
002c7f7c | 2613 | return -EIO; |
1c3d14fe | 2614 | |
468d472f SY |
2615 | min = 0; |
2616 | opt = VM_ENTRY_LOAD_IA32_PAT; | |
1c3d14fe YS |
2617 | if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS, |
2618 | &_vmentry_control) < 0) | |
002c7f7c | 2619 | return -EIO; |
6aa8b732 | 2620 | |
c68876fd | 2621 | rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high); |
1c3d14fe YS |
2622 | |
2623 | /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */ | |
2624 | if ((vmx_msr_high & 0x1fff) > PAGE_SIZE) | |
002c7f7c | 2625 | return -EIO; |
1c3d14fe YS |
2626 | |
2627 | #ifdef CONFIG_X86_64 | |
2628 | /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */ | |
2629 | if (vmx_msr_high & (1u<<16)) | |
002c7f7c | 2630 | return -EIO; |
1c3d14fe YS |
2631 | #endif |
2632 | ||
2633 | /* Require Write-Back (WB) memory type for VMCS accesses. */ | |
2634 | if (((vmx_msr_high >> 18) & 15) != 6) | |
002c7f7c | 2635 | return -EIO; |
1c3d14fe | 2636 | |
002c7f7c YS |
2637 | vmcs_conf->size = vmx_msr_high & 0x1fff; |
2638 | vmcs_conf->order = get_order(vmcs_config.size); | |
2639 | vmcs_conf->revision_id = vmx_msr_low; | |
1c3d14fe | 2640 | |
002c7f7c YS |
2641 | vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control; |
2642 | vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control; | |
f78e0e2e | 2643 | vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control; |
002c7f7c YS |
2644 | vmcs_conf->vmexit_ctrl = _vmexit_control; |
2645 | vmcs_conf->vmentry_ctrl = _vmentry_control; | |
1c3d14fe | 2646 | |
110312c8 AK |
2647 | cpu_has_load_ia32_efer = |
2648 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
2649 | VM_ENTRY_LOAD_IA32_EFER) | |
2650 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
2651 | VM_EXIT_LOAD_IA32_EFER); | |
2652 | ||
8bf00a52 GN |
2653 | cpu_has_load_perf_global_ctrl = |
2654 | allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS, | |
2655 | VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) | |
2656 | && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS, | |
2657 | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); | |
2658 | ||
2659 | /* | |
2660 | * Some cpus support VM_ENTRY_(LOAD|SAVE)_IA32_PERF_GLOBAL_CTRL | |
2661 | * but due to arrata below it can't be used. Workaround is to use | |
2662 | * msr load mechanism to switch IA32_PERF_GLOBAL_CTRL. | |
2663 | * | |
2664 | * VM Exit May Incorrectly Clear IA32_PERF_GLOBAL_CTRL [34:32] | |
2665 | * | |
2666 | * AAK155 (model 26) | |
2667 | * AAP115 (model 30) | |
2668 | * AAT100 (model 37) | |
2669 | * BC86,AAY89,BD102 (model 44) | |
2670 | * BA97 (model 46) | |
2671 | * | |
2672 | */ | |
2673 | if (cpu_has_load_perf_global_ctrl && boot_cpu_data.x86 == 0x6) { | |
2674 | switch (boot_cpu_data.x86_model) { | |
2675 | case 26: | |
2676 | case 30: | |
2677 | case 37: | |
2678 | case 44: | |
2679 | case 46: | |
2680 | cpu_has_load_perf_global_ctrl = false; | |
2681 | printk_once(KERN_WARNING"kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL " | |
2682 | "does not work properly. Using workaround\n"); | |
2683 | break; | |
2684 | default: | |
2685 | break; | |
2686 | } | |
2687 | } | |
2688 | ||
1c3d14fe | 2689 | return 0; |
c68876fd | 2690 | } |
6aa8b732 AK |
2691 | |
2692 | static struct vmcs *alloc_vmcs_cpu(int cpu) | |
2693 | { | |
2694 | int node = cpu_to_node(cpu); | |
2695 | struct page *pages; | |
2696 | struct vmcs *vmcs; | |
2697 | ||
6484eb3e | 2698 | pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order); |
6aa8b732 AK |
2699 | if (!pages) |
2700 | return NULL; | |
2701 | vmcs = page_address(pages); | |
1c3d14fe YS |
2702 | memset(vmcs, 0, vmcs_config.size); |
2703 | vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */ | |
6aa8b732 AK |
2704 | return vmcs; |
2705 | } | |
2706 | ||
2707 | static struct vmcs *alloc_vmcs(void) | |
2708 | { | |
d3b2c338 | 2709 | return alloc_vmcs_cpu(raw_smp_processor_id()); |
6aa8b732 AK |
2710 | } |
2711 | ||
2712 | static void free_vmcs(struct vmcs *vmcs) | |
2713 | { | |
1c3d14fe | 2714 | free_pages((unsigned long)vmcs, vmcs_config.order); |
6aa8b732 AK |
2715 | } |
2716 | ||
d462b819 NHE |
2717 | /* |
2718 | * Free a VMCS, but before that VMCLEAR it on the CPU where it was last loaded | |
2719 | */ | |
2720 | static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs) | |
2721 | { | |
2722 | if (!loaded_vmcs->vmcs) | |
2723 | return; | |
2724 | loaded_vmcs_clear(loaded_vmcs); | |
2725 | free_vmcs(loaded_vmcs->vmcs); | |
2726 | loaded_vmcs->vmcs = NULL; | |
2727 | } | |
2728 | ||
39959588 | 2729 | static void free_kvm_area(void) |
6aa8b732 AK |
2730 | { |
2731 | int cpu; | |
2732 | ||
3230bb47 | 2733 | for_each_possible_cpu(cpu) { |
6aa8b732 | 2734 | free_vmcs(per_cpu(vmxarea, cpu)); |
3230bb47 ZA |
2735 | per_cpu(vmxarea, cpu) = NULL; |
2736 | } | |
6aa8b732 AK |
2737 | } |
2738 | ||
6aa8b732 AK |
2739 | static __init int alloc_kvm_area(void) |
2740 | { | |
2741 | int cpu; | |
2742 | ||
3230bb47 | 2743 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
2744 | struct vmcs *vmcs; |
2745 | ||
2746 | vmcs = alloc_vmcs_cpu(cpu); | |
2747 | if (!vmcs) { | |
2748 | free_kvm_area(); | |
2749 | return -ENOMEM; | |
2750 | } | |
2751 | ||
2752 | per_cpu(vmxarea, cpu) = vmcs; | |
2753 | } | |
2754 | return 0; | |
2755 | } | |
2756 | ||
2757 | static __init int hardware_setup(void) | |
2758 | { | |
002c7f7c YS |
2759 | if (setup_vmcs_config(&vmcs_config) < 0) |
2760 | return -EIO; | |
50a37eb4 JR |
2761 | |
2762 | if (boot_cpu_has(X86_FEATURE_NX)) | |
2763 | kvm_enable_efer_bits(EFER_NX); | |
2764 | ||
93ba03c2 SY |
2765 | if (!cpu_has_vmx_vpid()) |
2766 | enable_vpid = 0; | |
2767 | ||
4bc9b982 SY |
2768 | if (!cpu_has_vmx_ept() || |
2769 | !cpu_has_vmx_ept_4levels()) { | |
93ba03c2 | 2770 | enable_ept = 0; |
3a624e29 | 2771 | enable_unrestricted_guest = 0; |
83c3a331 | 2772 | enable_ept_ad_bits = 0; |
3a624e29 NK |
2773 | } |
2774 | ||
83c3a331 XH |
2775 | if (!cpu_has_vmx_ept_ad_bits()) |
2776 | enable_ept_ad_bits = 0; | |
2777 | ||
3a624e29 NK |
2778 | if (!cpu_has_vmx_unrestricted_guest()) |
2779 | enable_unrestricted_guest = 0; | |
93ba03c2 SY |
2780 | |
2781 | if (!cpu_has_vmx_flexpriority()) | |
2782 | flexpriority_enabled = 0; | |
2783 | ||
95ba8273 GN |
2784 | if (!cpu_has_vmx_tpr_shadow()) |
2785 | kvm_x86_ops->update_cr8_intercept = NULL; | |
2786 | ||
54dee993 MT |
2787 | if (enable_ept && !cpu_has_vmx_ept_2m_page()) |
2788 | kvm_disable_largepages(); | |
2789 | ||
4b8d54f9 ZE |
2790 | if (!cpu_has_vmx_ple()) |
2791 | ple_gap = 0; | |
2792 | ||
c7c9c56c YZ |
2793 | if (!cpu_has_vmx_apic_register_virt() || |
2794 | !cpu_has_vmx_virtual_intr_delivery()) | |
2795 | enable_apicv_reg_vid = 0; | |
2796 | ||
2797 | if (enable_apicv_reg_vid) | |
2798 | kvm_x86_ops->update_cr8_intercept = NULL; | |
2799 | else | |
2800 | kvm_x86_ops->hwapic_irr_update = NULL; | |
83d4c286 | 2801 | |
b87a51ae NHE |
2802 | if (nested) |
2803 | nested_vmx_setup_ctls_msrs(); | |
2804 | ||
6aa8b732 AK |
2805 | return alloc_kvm_area(); |
2806 | } | |
2807 | ||
2808 | static __exit void hardware_unsetup(void) | |
2809 | { | |
2810 | free_kvm_area(); | |
2811 | } | |
2812 | ||
14168786 GN |
2813 | static bool emulation_required(struct kvm_vcpu *vcpu) |
2814 | { | |
2815 | return emulate_invalid_guest_state && !guest_state_valid(vcpu); | |
2816 | } | |
2817 | ||
91b0aa2c | 2818 | static void fix_pmode_seg(struct kvm_vcpu *vcpu, int seg, |
d99e4152 | 2819 | struct kvm_segment *save) |
6aa8b732 | 2820 | { |
d99e4152 GN |
2821 | if (!emulate_invalid_guest_state) { |
2822 | /* | |
2823 | * CS and SS RPL should be equal during guest entry according | |
2824 | * to VMX spec, but in reality it is not always so. Since vcpu | |
2825 | * is in the middle of the transition from real mode to | |
2826 | * protected mode it is safe to assume that RPL 0 is a good | |
2827 | * default value. | |
2828 | */ | |
2829 | if (seg == VCPU_SREG_CS || seg == VCPU_SREG_SS) | |
2830 | save->selector &= ~SELECTOR_RPL_MASK; | |
2831 | save->dpl = save->selector & SELECTOR_RPL_MASK; | |
2832 | save->s = 1; | |
6aa8b732 | 2833 | } |
d99e4152 | 2834 | vmx_set_segment(vcpu, save, seg); |
6aa8b732 AK |
2835 | } |
2836 | ||
2837 | static void enter_pmode(struct kvm_vcpu *vcpu) | |
2838 | { | |
2839 | unsigned long flags; | |
a89a8fb9 | 2840 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 2841 | |
d99e4152 GN |
2842 | /* |
2843 | * Update real mode segment cache. It may be not up-to-date if sement | |
2844 | * register was written while vcpu was in a guest mode. | |
2845 | */ | |
2846 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES); | |
2847 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS); | |
2848 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS); | |
2849 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS); | |
2850 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS); | |
2851 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS); | |
2852 | ||
7ffd92c5 | 2853 | vmx->rmode.vm86_active = 0; |
6aa8b732 | 2854 | |
2fb92db1 AK |
2855 | vmx_segment_cache_clear(vmx); |
2856 | ||
f5f7b2fe | 2857 | vmx_set_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR); |
6aa8b732 AK |
2858 | |
2859 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 AK |
2860 | flags &= RMODE_GUEST_OWNED_EFLAGS_BITS; |
2861 | flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS; | |
6aa8b732 AK |
2862 | vmcs_writel(GUEST_RFLAGS, flags); |
2863 | ||
66aee91a RR |
2864 | vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) | |
2865 | (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME)); | |
6aa8b732 AK |
2866 | |
2867 | update_exception_bitmap(vcpu); | |
2868 | ||
91b0aa2c GN |
2869 | fix_pmode_seg(vcpu, VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]); |
2870 | fix_pmode_seg(vcpu, VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]); | |
2871 | fix_pmode_seg(vcpu, VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]); | |
2872 | fix_pmode_seg(vcpu, VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]); | |
2873 | fix_pmode_seg(vcpu, VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]); | |
2874 | fix_pmode_seg(vcpu, VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]); | |
1f3141e8 GN |
2875 | |
2876 | /* CPL is always 0 when CPU enters protected mode */ | |
2877 | __set_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); | |
2878 | vmx->cpl = 0; | |
6aa8b732 AK |
2879 | } |
2880 | ||
d77c26fc | 2881 | static gva_t rmode_tss_base(struct kvm *kvm) |
6aa8b732 | 2882 | { |
bfc6d222 | 2883 | if (!kvm->arch.tss_addr) { |
bc6678a3 | 2884 | struct kvm_memslots *slots; |
28a37544 | 2885 | struct kvm_memory_slot *slot; |
bc6678a3 MT |
2886 | gfn_t base_gfn; |
2887 | ||
90d83dc3 | 2888 | slots = kvm_memslots(kvm); |
28a37544 XG |
2889 | slot = id_to_memslot(slots, 0); |
2890 | base_gfn = slot->base_gfn + slot->npages - 3; | |
2891 | ||
cbc94022 IE |
2892 | return base_gfn << PAGE_SHIFT; |
2893 | } | |
bfc6d222 | 2894 | return kvm->arch.tss_addr; |
6aa8b732 AK |
2895 | } |
2896 | ||
f5f7b2fe | 2897 | static void fix_rmode_seg(int seg, struct kvm_segment *save) |
6aa8b732 | 2898 | { |
772e0318 | 2899 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
d99e4152 GN |
2900 | struct kvm_segment var = *save; |
2901 | ||
2902 | var.dpl = 0x3; | |
2903 | if (seg == VCPU_SREG_CS) | |
2904 | var.type = 0x3; | |
2905 | ||
2906 | if (!emulate_invalid_guest_state) { | |
2907 | var.selector = var.base >> 4; | |
2908 | var.base = var.base & 0xffff0; | |
2909 | var.limit = 0xffff; | |
2910 | var.g = 0; | |
2911 | var.db = 0; | |
2912 | var.present = 1; | |
2913 | var.s = 1; | |
2914 | var.l = 0; | |
2915 | var.unusable = 0; | |
2916 | var.type = 0x3; | |
2917 | var.avl = 0; | |
2918 | if (save->base & 0xf) | |
2919 | printk_once(KERN_WARNING "kvm: segment base is not " | |
2920 | "paragraph aligned when entering " | |
2921 | "protected mode (seg=%d)", seg); | |
2922 | } | |
6aa8b732 | 2923 | |
d99e4152 GN |
2924 | vmcs_write16(sf->selector, var.selector); |
2925 | vmcs_write32(sf->base, var.base); | |
2926 | vmcs_write32(sf->limit, var.limit); | |
2927 | vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(&var)); | |
6aa8b732 AK |
2928 | } |
2929 | ||
2930 | static void enter_rmode(struct kvm_vcpu *vcpu) | |
2931 | { | |
2932 | unsigned long flags; | |
a89a8fb9 | 2933 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 | 2934 | |
f5f7b2fe AK |
2935 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR); |
2936 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES); | |
2937 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS); | |
2938 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS); | |
2939 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS); | |
c6ad1153 GN |
2940 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS); |
2941 | vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS); | |
f5f7b2fe | 2942 | |
7ffd92c5 | 2943 | vmx->rmode.vm86_active = 1; |
6aa8b732 | 2944 | |
776e58ea GN |
2945 | /* |
2946 | * Very old userspace does not call KVM_SET_TSS_ADDR before entering | |
2947 | * vcpu. Call it here with phys address pointing 16M below 4G. | |
2948 | */ | |
2949 | if (!vcpu->kvm->arch.tss_addr) { | |
2950 | printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be " | |
2951 | "called before entering vcpu\n"); | |
2952 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); | |
2953 | vmx_set_tss_addr(vcpu->kvm, 0xfeffd000); | |
2954 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2955 | } | |
2956 | ||
2fb92db1 AK |
2957 | vmx_segment_cache_clear(vmx); |
2958 | ||
6aa8b732 | 2959 | vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm)); |
6aa8b732 | 2960 | vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1); |
6aa8b732 AK |
2961 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); |
2962 | ||
2963 | flags = vmcs_readl(GUEST_RFLAGS); | |
78ac8b47 | 2964 | vmx->rmode.save_rflags = flags; |
6aa8b732 | 2965 | |
053de044 | 2966 | flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM; |
6aa8b732 AK |
2967 | |
2968 | vmcs_writel(GUEST_RFLAGS, flags); | |
66aee91a | 2969 | vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME); |
6aa8b732 AK |
2970 | update_exception_bitmap(vcpu); |
2971 | ||
d99e4152 GN |
2972 | fix_rmode_seg(VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]); |
2973 | fix_rmode_seg(VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]); | |
2974 | fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]); | |
2975 | fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]); | |
2976 | fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]); | |
2977 | fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]); | |
b246dd5d | 2978 | |
8668a3c4 | 2979 | kvm_mmu_reset_context(vcpu); |
6aa8b732 AK |
2980 | } |
2981 | ||
401d10de AS |
2982 | static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
2983 | { | |
2984 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
26bb0981 AK |
2985 | struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER); |
2986 | ||
2987 | if (!msr) | |
2988 | return; | |
401d10de | 2989 | |
44ea2b17 AK |
2990 | /* |
2991 | * Force kernel_gs_base reloading before EFER changes, as control | |
2992 | * of this msr depends on is_long_mode(). | |
2993 | */ | |
2994 | vmx_load_host_state(to_vmx(vcpu)); | |
f6801dff | 2995 | vcpu->arch.efer = efer; |
401d10de AS |
2996 | if (efer & EFER_LMA) { |
2997 | vmcs_write32(VM_ENTRY_CONTROLS, | |
2998 | vmcs_read32(VM_ENTRY_CONTROLS) | | |
2999 | VM_ENTRY_IA32E_MODE); | |
3000 | msr->data = efer; | |
3001 | } else { | |
3002 | vmcs_write32(VM_ENTRY_CONTROLS, | |
3003 | vmcs_read32(VM_ENTRY_CONTROLS) & | |
3004 | ~VM_ENTRY_IA32E_MODE); | |
3005 | ||
3006 | msr->data = efer & ~EFER_LME; | |
3007 | } | |
3008 | setup_msrs(vmx); | |
3009 | } | |
3010 | ||
05b3e0c2 | 3011 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
3012 | |
3013 | static void enter_lmode(struct kvm_vcpu *vcpu) | |
3014 | { | |
3015 | u32 guest_tr_ar; | |
3016 | ||
2fb92db1 AK |
3017 | vmx_segment_cache_clear(to_vmx(vcpu)); |
3018 | ||
6aa8b732 AK |
3019 | guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES); |
3020 | if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) { | |
bd80158a JK |
3021 | pr_debug_ratelimited("%s: tss fixup for long mode. \n", |
3022 | __func__); | |
6aa8b732 AK |
3023 | vmcs_write32(GUEST_TR_AR_BYTES, |
3024 | (guest_tr_ar & ~AR_TYPE_MASK) | |
3025 | | AR_TYPE_BUSY_64_TSS); | |
3026 | } | |
da38f438 | 3027 | vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA); |
6aa8b732 AK |
3028 | } |
3029 | ||
3030 | static void exit_lmode(struct kvm_vcpu *vcpu) | |
3031 | { | |
6aa8b732 AK |
3032 | vmcs_write32(VM_ENTRY_CONTROLS, |
3033 | vmcs_read32(VM_ENTRY_CONTROLS) | |
1e4e6e00 | 3034 | & ~VM_ENTRY_IA32E_MODE); |
da38f438 | 3035 | vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA); |
6aa8b732 AK |
3036 | } |
3037 | ||
3038 | #endif | |
3039 | ||
2384d2b3 SY |
3040 | static void vmx_flush_tlb(struct kvm_vcpu *vcpu) |
3041 | { | |
b9d762fa | 3042 | vpid_sync_context(to_vmx(vcpu)); |
dd180b3e XG |
3043 | if (enable_ept) { |
3044 | if (!VALID_PAGE(vcpu->arch.mmu.root_hpa)) | |
3045 | return; | |
4e1096d2 | 3046 | ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa)); |
dd180b3e | 3047 | } |
2384d2b3 SY |
3048 | } |
3049 | ||
e8467fda AK |
3050 | static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
3051 | { | |
3052 | ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits; | |
3053 | ||
3054 | vcpu->arch.cr0 &= ~cr0_guest_owned_bits; | |
3055 | vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits; | |
3056 | } | |
3057 | ||
aff48baa AK |
3058 | static void vmx_decache_cr3(struct kvm_vcpu *vcpu) |
3059 | { | |
3060 | if (enable_ept && is_paging(vcpu)) | |
3061 | vcpu->arch.cr3 = vmcs_readl(GUEST_CR3); | |
3062 | __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail); | |
3063 | } | |
3064 | ||
25c4c276 | 3065 | static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 | 3066 | { |
fc78f519 AK |
3067 | ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits; |
3068 | ||
3069 | vcpu->arch.cr4 &= ~cr4_guest_owned_bits; | |
3070 | vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits; | |
399badf3 AK |
3071 | } |
3072 | ||
1439442c SY |
3073 | static void ept_load_pdptrs(struct kvm_vcpu *vcpu) |
3074 | { | |
6de4f3ad AK |
3075 | if (!test_bit(VCPU_EXREG_PDPTR, |
3076 | (unsigned long *)&vcpu->arch.regs_dirty)) | |
3077 | return; | |
3078 | ||
1439442c | 3079 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { |
ff03a073 JR |
3080 | vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]); |
3081 | vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]); | |
3082 | vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]); | |
3083 | vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]); | |
1439442c SY |
3084 | } |
3085 | } | |
3086 | ||
8f5d549f AK |
3087 | static void ept_save_pdptrs(struct kvm_vcpu *vcpu) |
3088 | { | |
3089 | if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) { | |
ff03a073 JR |
3090 | vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0); |
3091 | vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1); | |
3092 | vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2); | |
3093 | vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3); | |
8f5d549f | 3094 | } |
6de4f3ad AK |
3095 | |
3096 | __set_bit(VCPU_EXREG_PDPTR, | |
3097 | (unsigned long *)&vcpu->arch.regs_avail); | |
3098 | __set_bit(VCPU_EXREG_PDPTR, | |
3099 | (unsigned long *)&vcpu->arch.regs_dirty); | |
8f5d549f AK |
3100 | } |
3101 | ||
5e1746d6 | 3102 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
1439442c SY |
3103 | |
3104 | static void ept_update_paging_mode_cr0(unsigned long *hw_cr0, | |
3105 | unsigned long cr0, | |
3106 | struct kvm_vcpu *vcpu) | |
3107 | { | |
5233dd51 MT |
3108 | if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail)) |
3109 | vmx_decache_cr3(vcpu); | |
1439442c SY |
3110 | if (!(cr0 & X86_CR0_PG)) { |
3111 | /* From paging/starting to nonpaging */ | |
3112 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 3113 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) | |
1439442c SY |
3114 | (CPU_BASED_CR3_LOAD_EXITING | |
3115 | CPU_BASED_CR3_STORE_EXITING)); | |
3116 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 3117 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c SY |
3118 | } else if (!is_paging(vcpu)) { |
3119 | /* From nonpaging to paging */ | |
3120 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, | |
65267ea1 | 3121 | vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) & |
1439442c SY |
3122 | ~(CPU_BASED_CR3_LOAD_EXITING | |
3123 | CPU_BASED_CR3_STORE_EXITING)); | |
3124 | vcpu->arch.cr0 = cr0; | |
fc78f519 | 3125 | vmx_set_cr4(vcpu, kvm_read_cr4(vcpu)); |
1439442c | 3126 | } |
95eb84a7 SY |
3127 | |
3128 | if (!(cr0 & X86_CR0_WP)) | |
3129 | *hw_cr0 &= ~X86_CR0_WP; | |
1439442c SY |
3130 | } |
3131 | ||
6aa8b732 AK |
3132 | static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
3133 | { | |
7ffd92c5 | 3134 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3a624e29 NK |
3135 | unsigned long hw_cr0; |
3136 | ||
5037878e | 3137 | hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK); |
3a624e29 | 3138 | if (enable_unrestricted_guest) |
5037878e | 3139 | hw_cr0 |= KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST; |
218e763f | 3140 | else { |
5037878e | 3141 | hw_cr0 |= KVM_VM_CR0_ALWAYS_ON; |
1439442c | 3142 | |
218e763f GN |
3143 | if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE)) |
3144 | enter_pmode(vcpu); | |
6aa8b732 | 3145 | |
218e763f GN |
3146 | if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE)) |
3147 | enter_rmode(vcpu); | |
3148 | } | |
6aa8b732 | 3149 | |
05b3e0c2 | 3150 | #ifdef CONFIG_X86_64 |
f6801dff | 3151 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 3152 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) |
6aa8b732 | 3153 | enter_lmode(vcpu); |
707d92fa | 3154 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) |
6aa8b732 AK |
3155 | exit_lmode(vcpu); |
3156 | } | |
3157 | #endif | |
3158 | ||
089d034e | 3159 | if (enable_ept) |
1439442c SY |
3160 | ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu); |
3161 | ||
02daab21 | 3162 | if (!vcpu->fpu_active) |
81231c69 | 3163 | hw_cr0 |= X86_CR0_TS | X86_CR0_MP; |
02daab21 | 3164 | |
6aa8b732 | 3165 | vmcs_writel(CR0_READ_SHADOW, cr0); |
1439442c | 3166 | vmcs_writel(GUEST_CR0, hw_cr0); |
ad312c7c | 3167 | vcpu->arch.cr0 = cr0; |
14168786 GN |
3168 | |
3169 | /* depends on vcpu->arch.cr0 to be set to a new value */ | |
3170 | vmx->emulation_required = emulation_required(vcpu); | |
6aa8b732 AK |
3171 | } |
3172 | ||
1439442c SY |
3173 | static u64 construct_eptp(unsigned long root_hpa) |
3174 | { | |
3175 | u64 eptp; | |
3176 | ||
3177 | /* TODO write the value reading from MSR */ | |
3178 | eptp = VMX_EPT_DEFAULT_MT | | |
3179 | VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT; | |
b38f9934 XH |
3180 | if (enable_ept_ad_bits) |
3181 | eptp |= VMX_EPT_AD_ENABLE_BIT; | |
1439442c SY |
3182 | eptp |= (root_hpa & PAGE_MASK); |
3183 | ||
3184 | return eptp; | |
3185 | } | |
3186 | ||
6aa8b732 AK |
3187 | static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
3188 | { | |
1439442c SY |
3189 | unsigned long guest_cr3; |
3190 | u64 eptp; | |
3191 | ||
3192 | guest_cr3 = cr3; | |
089d034e | 3193 | if (enable_ept) { |
1439442c SY |
3194 | eptp = construct_eptp(cr3); |
3195 | vmcs_write64(EPT_POINTER, eptp); | |
9f8fe504 | 3196 | guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) : |
b927a3ce | 3197 | vcpu->kvm->arch.ept_identity_map_addr; |
7c93be44 | 3198 | ept_load_pdptrs(vcpu); |
1439442c SY |
3199 | } |
3200 | ||
2384d2b3 | 3201 | vmx_flush_tlb(vcpu); |
1439442c | 3202 | vmcs_writel(GUEST_CR3, guest_cr3); |
6aa8b732 AK |
3203 | } |
3204 | ||
5e1746d6 | 3205 | static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
6aa8b732 | 3206 | { |
7ffd92c5 | 3207 | unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ? |
1439442c SY |
3208 | KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON); |
3209 | ||
5e1746d6 NHE |
3210 | if (cr4 & X86_CR4_VMXE) { |
3211 | /* | |
3212 | * To use VMXON (and later other VMX instructions), a guest | |
3213 | * must first be able to turn on cr4.VMXE (see handle_vmon()). | |
3214 | * So basically the check on whether to allow nested VMX | |
3215 | * is here. | |
3216 | */ | |
3217 | if (!nested_vmx_allowed(vcpu)) | |
3218 | return 1; | |
3219 | } else if (to_vmx(vcpu)->nested.vmxon) | |
3220 | return 1; | |
3221 | ||
ad312c7c | 3222 | vcpu->arch.cr4 = cr4; |
bc23008b AK |
3223 | if (enable_ept) { |
3224 | if (!is_paging(vcpu)) { | |
3225 | hw_cr4 &= ~X86_CR4_PAE; | |
3226 | hw_cr4 |= X86_CR4_PSE; | |
c08800a5 DX |
3227 | /* |
3228 | * SMEP is disabled if CPU is in non-paging mode in | |
3229 | * hardware. However KVM always uses paging mode to | |
3230 | * emulate guest non-paging mode with TDP. | |
3231 | * To emulate this behavior, SMEP needs to be manually | |
3232 | * disabled when guest switches to non-paging mode. | |
3233 | */ | |
3234 | hw_cr4 &= ~X86_CR4_SMEP; | |
bc23008b AK |
3235 | } else if (!(cr4 & X86_CR4_PAE)) { |
3236 | hw_cr4 &= ~X86_CR4_PAE; | |
3237 | } | |
3238 | } | |
1439442c SY |
3239 | |
3240 | vmcs_writel(CR4_READ_SHADOW, cr4); | |
3241 | vmcs_writel(GUEST_CR4, hw_cr4); | |
5e1746d6 | 3242 | return 0; |
6aa8b732 AK |
3243 | } |
3244 | ||
6aa8b732 AK |
3245 | static void vmx_get_segment(struct kvm_vcpu *vcpu, |
3246 | struct kvm_segment *var, int seg) | |
3247 | { | |
a9179499 | 3248 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6aa8b732 AK |
3249 | u32 ar; |
3250 | ||
c6ad1153 | 3251 | if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) { |
f5f7b2fe | 3252 | *var = vmx->rmode.segs[seg]; |
a9179499 | 3253 | if (seg == VCPU_SREG_TR |
2fb92db1 | 3254 | || var->selector == vmx_read_guest_seg_selector(vmx, seg)) |
f5f7b2fe | 3255 | return; |
1390a28b AK |
3256 | var->base = vmx_read_guest_seg_base(vmx, seg); |
3257 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
3258 | return; | |
a9179499 | 3259 | } |
2fb92db1 AK |
3260 | var->base = vmx_read_guest_seg_base(vmx, seg); |
3261 | var->limit = vmx_read_guest_seg_limit(vmx, seg); | |
3262 | var->selector = vmx_read_guest_seg_selector(vmx, seg); | |
3263 | ar = vmx_read_guest_seg_ar(vmx, seg); | |
6aa8b732 AK |
3264 | var->type = ar & 15; |
3265 | var->s = (ar >> 4) & 1; | |
3266 | var->dpl = (ar >> 5) & 3; | |
3267 | var->present = (ar >> 7) & 1; | |
3268 | var->avl = (ar >> 12) & 1; | |
3269 | var->l = (ar >> 13) & 1; | |
3270 | var->db = (ar >> 14) & 1; | |
3271 | var->g = (ar >> 15) & 1; | |
3272 | var->unusable = (ar >> 16) & 1; | |
3273 | } | |
3274 | ||
a9179499 AK |
3275 | static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg) |
3276 | { | |
a9179499 AK |
3277 | struct kvm_segment s; |
3278 | ||
3279 | if (to_vmx(vcpu)->rmode.vm86_active) { | |
3280 | vmx_get_segment(vcpu, &s, seg); | |
3281 | return s.base; | |
3282 | } | |
2fb92db1 | 3283 | return vmx_read_guest_seg_base(to_vmx(vcpu), seg); |
a9179499 AK |
3284 | } |
3285 | ||
b09408d0 | 3286 | static int vmx_get_cpl(struct kvm_vcpu *vcpu) |
2e4d2653 | 3287 | { |
b09408d0 MT |
3288 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
3289 | ||
3eeb3288 | 3290 | if (!is_protmode(vcpu)) |
2e4d2653 IE |
3291 | return 0; |
3292 | ||
f4c63e5d AK |
3293 | if (!is_long_mode(vcpu) |
3294 | && (kvm_get_rflags(vcpu) & X86_EFLAGS_VM)) /* if virtual 8086 */ | |
2e4d2653 IE |
3295 | return 3; |
3296 | ||
69c73028 AK |
3297 | if (!test_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail)) { |
3298 | __set_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); | |
b09408d0 | 3299 | vmx->cpl = vmx_read_guest_seg_selector(vmx, VCPU_SREG_CS) & 3; |
69c73028 | 3300 | } |
d881e6f6 AK |
3301 | |
3302 | return vmx->cpl; | |
69c73028 AK |
3303 | } |
3304 | ||
3305 | ||
653e3108 | 3306 | static u32 vmx_segment_access_rights(struct kvm_segment *var) |
6aa8b732 | 3307 | { |
6aa8b732 AK |
3308 | u32 ar; |
3309 | ||
f0495f9b | 3310 | if (var->unusable || !var->present) |
6aa8b732 AK |
3311 | ar = 1 << 16; |
3312 | else { | |
3313 | ar = var->type & 15; | |
3314 | ar |= (var->s & 1) << 4; | |
3315 | ar |= (var->dpl & 3) << 5; | |
3316 | ar |= (var->present & 1) << 7; | |
3317 | ar |= (var->avl & 1) << 12; | |
3318 | ar |= (var->l & 1) << 13; | |
3319 | ar |= (var->db & 1) << 14; | |
3320 | ar |= (var->g & 1) << 15; | |
3321 | } | |
653e3108 AK |
3322 | |
3323 | return ar; | |
3324 | } | |
3325 | ||
3326 | static void vmx_set_segment(struct kvm_vcpu *vcpu, | |
3327 | struct kvm_segment *var, int seg) | |
3328 | { | |
7ffd92c5 | 3329 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
772e0318 | 3330 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
653e3108 | 3331 | |
2fb92db1 | 3332 | vmx_segment_cache_clear(vmx); |
2f143240 GN |
3333 | if (seg == VCPU_SREG_CS) |
3334 | __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail); | |
2fb92db1 | 3335 | |
1ecd50a9 GN |
3336 | if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) { |
3337 | vmx->rmode.segs[seg] = *var; | |
3338 | if (seg == VCPU_SREG_TR) | |
3339 | vmcs_write16(sf->selector, var->selector); | |
3340 | else if (var->s) | |
3341 | fix_rmode_seg(seg, &vmx->rmode.segs[seg]); | |
d99e4152 | 3342 | goto out; |
653e3108 | 3343 | } |
1ecd50a9 | 3344 | |
653e3108 AK |
3345 | vmcs_writel(sf->base, var->base); |
3346 | vmcs_write32(sf->limit, var->limit); | |
3347 | vmcs_write16(sf->selector, var->selector); | |
3a624e29 NK |
3348 | |
3349 | /* | |
3350 | * Fix the "Accessed" bit in AR field of segment registers for older | |
3351 | * qemu binaries. | |
3352 | * IA32 arch specifies that at the time of processor reset the | |
3353 | * "Accessed" bit in the AR field of segment registers is 1. And qemu | |
0fa06071 | 3354 | * is setting it to 0 in the userland code. This causes invalid guest |
3a624e29 NK |
3355 | * state vmexit when "unrestricted guest" mode is turned on. |
3356 | * Fix for this setup issue in cpu_reset is being pushed in the qemu | |
3357 | * tree. Newer qemu binaries with that qemu fix would not need this | |
3358 | * kvm hack. | |
3359 | */ | |
3360 | if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR)) | |
f924d66d | 3361 | var->type |= 0x1; /* Accessed */ |
3a624e29 | 3362 | |
f924d66d | 3363 | vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(var)); |
d99e4152 GN |
3364 | |
3365 | out: | |
14168786 | 3366 | vmx->emulation_required |= emulation_required(vcpu); |
6aa8b732 AK |
3367 | } |
3368 | ||
6aa8b732 AK |
3369 | static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
3370 | { | |
2fb92db1 | 3371 | u32 ar = vmx_read_guest_seg_ar(to_vmx(vcpu), VCPU_SREG_CS); |
6aa8b732 AK |
3372 | |
3373 | *db = (ar >> 14) & 1; | |
3374 | *l = (ar >> 13) & 1; | |
3375 | } | |
3376 | ||
89a27f4d | 3377 | static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3378 | { |
89a27f4d GN |
3379 | dt->size = vmcs_read32(GUEST_IDTR_LIMIT); |
3380 | dt->address = vmcs_readl(GUEST_IDTR_BASE); | |
6aa8b732 AK |
3381 | } |
3382 | ||
89a27f4d | 3383 | static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3384 | { |
89a27f4d GN |
3385 | vmcs_write32(GUEST_IDTR_LIMIT, dt->size); |
3386 | vmcs_writel(GUEST_IDTR_BASE, dt->address); | |
6aa8b732 AK |
3387 | } |
3388 | ||
89a27f4d | 3389 | static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3390 | { |
89a27f4d GN |
3391 | dt->size = vmcs_read32(GUEST_GDTR_LIMIT); |
3392 | dt->address = vmcs_readl(GUEST_GDTR_BASE); | |
6aa8b732 AK |
3393 | } |
3394 | ||
89a27f4d | 3395 | static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 3396 | { |
89a27f4d GN |
3397 | vmcs_write32(GUEST_GDTR_LIMIT, dt->size); |
3398 | vmcs_writel(GUEST_GDTR_BASE, dt->address); | |
6aa8b732 AK |
3399 | } |
3400 | ||
648dfaa7 MG |
3401 | static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) |
3402 | { | |
3403 | struct kvm_segment var; | |
3404 | u32 ar; | |
3405 | ||
3406 | vmx_get_segment(vcpu, &var, seg); | |
07f42f5f | 3407 | var.dpl = 0x3; |
0647f4aa GN |
3408 | if (seg == VCPU_SREG_CS) |
3409 | var.type = 0x3; | |
648dfaa7 MG |
3410 | ar = vmx_segment_access_rights(&var); |
3411 | ||
3412 | if (var.base != (var.selector << 4)) | |
3413 | return false; | |
89efbed0 | 3414 | if (var.limit != 0xffff) |
648dfaa7 | 3415 | return false; |
07f42f5f | 3416 | if (ar != 0xf3) |
648dfaa7 MG |
3417 | return false; |
3418 | ||
3419 | return true; | |
3420 | } | |
3421 | ||
3422 | static bool code_segment_valid(struct kvm_vcpu *vcpu) | |
3423 | { | |
3424 | struct kvm_segment cs; | |
3425 | unsigned int cs_rpl; | |
3426 | ||
3427 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
3428 | cs_rpl = cs.selector & SELECTOR_RPL_MASK; | |
3429 | ||
1872a3f4 AK |
3430 | if (cs.unusable) |
3431 | return false; | |
648dfaa7 MG |
3432 | if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK)) |
3433 | return false; | |
3434 | if (!cs.s) | |
3435 | return false; | |
1872a3f4 | 3436 | if (cs.type & AR_TYPE_WRITEABLE_MASK) { |
648dfaa7 MG |
3437 | if (cs.dpl > cs_rpl) |
3438 | return false; | |
1872a3f4 | 3439 | } else { |
648dfaa7 MG |
3440 | if (cs.dpl != cs_rpl) |
3441 | return false; | |
3442 | } | |
3443 | if (!cs.present) | |
3444 | return false; | |
3445 | ||
3446 | /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */ | |
3447 | return true; | |
3448 | } | |
3449 | ||
3450 | static bool stack_segment_valid(struct kvm_vcpu *vcpu) | |
3451 | { | |
3452 | struct kvm_segment ss; | |
3453 | unsigned int ss_rpl; | |
3454 | ||
3455 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
3456 | ss_rpl = ss.selector & SELECTOR_RPL_MASK; | |
3457 | ||
1872a3f4 AK |
3458 | if (ss.unusable) |
3459 | return true; | |
3460 | if (ss.type != 3 && ss.type != 7) | |
648dfaa7 MG |
3461 | return false; |
3462 | if (!ss.s) | |
3463 | return false; | |
3464 | if (ss.dpl != ss_rpl) /* DPL != RPL */ | |
3465 | return false; | |
3466 | if (!ss.present) | |
3467 | return false; | |
3468 | ||
3469 | return true; | |
3470 | } | |
3471 | ||
3472 | static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg) | |
3473 | { | |
3474 | struct kvm_segment var; | |
3475 | unsigned int rpl; | |
3476 | ||
3477 | vmx_get_segment(vcpu, &var, seg); | |
3478 | rpl = var.selector & SELECTOR_RPL_MASK; | |
3479 | ||
1872a3f4 AK |
3480 | if (var.unusable) |
3481 | return true; | |
648dfaa7 MG |
3482 | if (!var.s) |
3483 | return false; | |
3484 | if (!var.present) | |
3485 | return false; | |
3486 | if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) { | |
3487 | if (var.dpl < rpl) /* DPL < RPL */ | |
3488 | return false; | |
3489 | } | |
3490 | ||
3491 | /* TODO: Add other members to kvm_segment_field to allow checking for other access | |
3492 | * rights flags | |
3493 | */ | |
3494 | return true; | |
3495 | } | |
3496 | ||
3497 | static bool tr_valid(struct kvm_vcpu *vcpu) | |
3498 | { | |
3499 | struct kvm_segment tr; | |
3500 | ||
3501 | vmx_get_segment(vcpu, &tr, VCPU_SREG_TR); | |
3502 | ||
1872a3f4 AK |
3503 | if (tr.unusable) |
3504 | return false; | |
648dfaa7 MG |
3505 | if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
3506 | return false; | |
1872a3f4 | 3507 | if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */ |
648dfaa7 MG |
3508 | return false; |
3509 | if (!tr.present) | |
3510 | return false; | |
3511 | ||
3512 | return true; | |
3513 | } | |
3514 | ||
3515 | static bool ldtr_valid(struct kvm_vcpu *vcpu) | |
3516 | { | |
3517 | struct kvm_segment ldtr; | |
3518 | ||
3519 | vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR); | |
3520 | ||
1872a3f4 AK |
3521 | if (ldtr.unusable) |
3522 | return true; | |
648dfaa7 MG |
3523 | if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */ |
3524 | return false; | |
3525 | if (ldtr.type != 2) | |
3526 | return false; | |
3527 | if (!ldtr.present) | |
3528 | return false; | |
3529 | ||
3530 | return true; | |
3531 | } | |
3532 | ||
3533 | static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu) | |
3534 | { | |
3535 | struct kvm_segment cs, ss; | |
3536 | ||
3537 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
3538 | vmx_get_segment(vcpu, &ss, VCPU_SREG_SS); | |
3539 | ||
3540 | return ((cs.selector & SELECTOR_RPL_MASK) == | |
3541 | (ss.selector & SELECTOR_RPL_MASK)); | |
3542 | } | |
3543 | ||
3544 | /* | |
3545 | * Check if guest state is valid. Returns true if valid, false if | |
3546 | * not. | |
3547 | * We assume that registers are always usable | |
3548 | */ | |
3549 | static bool guest_state_valid(struct kvm_vcpu *vcpu) | |
3550 | { | |
c5e97c80 GN |
3551 | if (enable_unrestricted_guest) |
3552 | return true; | |
3553 | ||
648dfaa7 | 3554 | /* real mode guest state checks */ |
3eeb3288 | 3555 | if (!is_protmode(vcpu)) { |
648dfaa7 MG |
3556 | if (!rmode_segment_valid(vcpu, VCPU_SREG_CS)) |
3557 | return false; | |
3558 | if (!rmode_segment_valid(vcpu, VCPU_SREG_SS)) | |
3559 | return false; | |
3560 | if (!rmode_segment_valid(vcpu, VCPU_SREG_DS)) | |
3561 | return false; | |
3562 | if (!rmode_segment_valid(vcpu, VCPU_SREG_ES)) | |
3563 | return false; | |
3564 | if (!rmode_segment_valid(vcpu, VCPU_SREG_FS)) | |
3565 | return false; | |
3566 | if (!rmode_segment_valid(vcpu, VCPU_SREG_GS)) | |
3567 | return false; | |
3568 | } else { | |
3569 | /* protected mode guest state checks */ | |
3570 | if (!cs_ss_rpl_check(vcpu)) | |
3571 | return false; | |
3572 | if (!code_segment_valid(vcpu)) | |
3573 | return false; | |
3574 | if (!stack_segment_valid(vcpu)) | |
3575 | return false; | |
3576 | if (!data_segment_valid(vcpu, VCPU_SREG_DS)) | |
3577 | return false; | |
3578 | if (!data_segment_valid(vcpu, VCPU_SREG_ES)) | |
3579 | return false; | |
3580 | if (!data_segment_valid(vcpu, VCPU_SREG_FS)) | |
3581 | return false; | |
3582 | if (!data_segment_valid(vcpu, VCPU_SREG_GS)) | |
3583 | return false; | |
3584 | if (!tr_valid(vcpu)) | |
3585 | return false; | |
3586 | if (!ldtr_valid(vcpu)) | |
3587 | return false; | |
3588 | } | |
3589 | /* TODO: | |
3590 | * - Add checks on RIP | |
3591 | * - Add checks on RFLAGS | |
3592 | */ | |
3593 | ||
3594 | return true; | |
3595 | } | |
3596 | ||
d77c26fc | 3597 | static int init_rmode_tss(struct kvm *kvm) |
6aa8b732 | 3598 | { |
40dcaa9f | 3599 | gfn_t fn; |
195aefde | 3600 | u16 data = 0; |
40dcaa9f | 3601 | int r, idx, ret = 0; |
6aa8b732 | 3602 | |
40dcaa9f XG |
3603 | idx = srcu_read_lock(&kvm->srcu); |
3604 | fn = rmode_tss_base(kvm) >> PAGE_SHIFT; | |
195aefde IE |
3605 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
3606 | if (r < 0) | |
10589a46 | 3607 | goto out; |
195aefde | 3608 | data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE; |
464d17c8 SY |
3609 | r = kvm_write_guest_page(kvm, fn++, &data, |
3610 | TSS_IOPB_BASE_OFFSET, sizeof(u16)); | |
195aefde | 3611 | if (r < 0) |
10589a46 | 3612 | goto out; |
195aefde IE |
3613 | r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE); |
3614 | if (r < 0) | |
10589a46 | 3615 | goto out; |
195aefde IE |
3616 | r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE); |
3617 | if (r < 0) | |
10589a46 | 3618 | goto out; |
195aefde | 3619 | data = ~0; |
10589a46 MT |
3620 | r = kvm_write_guest_page(kvm, fn, &data, |
3621 | RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1, | |
3622 | sizeof(u8)); | |
195aefde | 3623 | if (r < 0) |
10589a46 MT |
3624 | goto out; |
3625 | ||
3626 | ret = 1; | |
3627 | out: | |
40dcaa9f | 3628 | srcu_read_unlock(&kvm->srcu, idx); |
10589a46 | 3629 | return ret; |
6aa8b732 AK |
3630 | } |
3631 | ||
b7ebfb05 SY |
3632 | static int init_rmode_identity_map(struct kvm *kvm) |
3633 | { | |
40dcaa9f | 3634 | int i, idx, r, ret; |
b7ebfb05 SY |
3635 | pfn_t identity_map_pfn; |
3636 | u32 tmp; | |
3637 | ||
089d034e | 3638 | if (!enable_ept) |
b7ebfb05 SY |
3639 | return 1; |
3640 | if (unlikely(!kvm->arch.ept_identity_pagetable)) { | |
3641 | printk(KERN_ERR "EPT: identity-mapping pagetable " | |
3642 | "haven't been allocated!\n"); | |
3643 | return 0; | |
3644 | } | |
3645 | if (likely(kvm->arch.ept_identity_pagetable_done)) | |
3646 | return 1; | |
3647 | ret = 0; | |
b927a3ce | 3648 | identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT; |
40dcaa9f | 3649 | idx = srcu_read_lock(&kvm->srcu); |
b7ebfb05 SY |
3650 | r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE); |
3651 | if (r < 0) | |
3652 | goto out; | |
3653 | /* Set up identity-mapping pagetable for EPT in real mode */ | |
3654 | for (i = 0; i < PT32_ENT_PER_PAGE; i++) { | |
3655 | tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | | |
3656 | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE); | |
3657 | r = kvm_write_guest_page(kvm, identity_map_pfn, | |
3658 | &tmp, i * sizeof(tmp), sizeof(tmp)); | |
3659 | if (r < 0) | |
3660 | goto out; | |
3661 | } | |
3662 | kvm->arch.ept_identity_pagetable_done = true; | |
3663 | ret = 1; | |
3664 | out: | |
40dcaa9f | 3665 | srcu_read_unlock(&kvm->srcu, idx); |
b7ebfb05 SY |
3666 | return ret; |
3667 | } | |
3668 | ||
6aa8b732 AK |
3669 | static void seg_setup(int seg) |
3670 | { | |
772e0318 | 3671 | const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg]; |
3a624e29 | 3672 | unsigned int ar; |
6aa8b732 AK |
3673 | |
3674 | vmcs_write16(sf->selector, 0); | |
3675 | vmcs_writel(sf->base, 0); | |
3676 | vmcs_write32(sf->limit, 0xffff); | |
d54d07b2 GN |
3677 | ar = 0x93; |
3678 | if (seg == VCPU_SREG_CS) | |
3679 | ar |= 0x08; /* code segment */ | |
3a624e29 NK |
3680 | |
3681 | vmcs_write32(sf->ar_bytes, ar); | |
6aa8b732 AK |
3682 | } |
3683 | ||
f78e0e2e SY |
3684 | static int alloc_apic_access_page(struct kvm *kvm) |
3685 | { | |
4484141a | 3686 | struct page *page; |
f78e0e2e SY |
3687 | struct kvm_userspace_memory_region kvm_userspace_mem; |
3688 | int r = 0; | |
3689 | ||
79fac95e | 3690 | mutex_lock(&kvm->slots_lock); |
bfc6d222 | 3691 | if (kvm->arch.apic_access_page) |
f78e0e2e SY |
3692 | goto out; |
3693 | kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT; | |
3694 | kvm_userspace_mem.flags = 0; | |
3695 | kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL; | |
3696 | kvm_userspace_mem.memory_size = PAGE_SIZE; | |
47ae31e2 | 3697 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem); |
f78e0e2e SY |
3698 | if (r) |
3699 | goto out; | |
72dc67a6 | 3700 | |
4484141a XG |
3701 | page = gfn_to_page(kvm, 0xfee00); |
3702 | if (is_error_page(page)) { | |
3703 | r = -EFAULT; | |
3704 | goto out; | |
3705 | } | |
3706 | ||
3707 | kvm->arch.apic_access_page = page; | |
f78e0e2e | 3708 | out: |
79fac95e | 3709 | mutex_unlock(&kvm->slots_lock); |
f78e0e2e SY |
3710 | return r; |
3711 | } | |
3712 | ||
b7ebfb05 SY |
3713 | static int alloc_identity_pagetable(struct kvm *kvm) |
3714 | { | |
4484141a | 3715 | struct page *page; |
b7ebfb05 SY |
3716 | struct kvm_userspace_memory_region kvm_userspace_mem; |
3717 | int r = 0; | |
3718 | ||
79fac95e | 3719 | mutex_lock(&kvm->slots_lock); |
b7ebfb05 SY |
3720 | if (kvm->arch.ept_identity_pagetable) |
3721 | goto out; | |
3722 | kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT; | |
3723 | kvm_userspace_mem.flags = 0; | |
b927a3ce SY |
3724 | kvm_userspace_mem.guest_phys_addr = |
3725 | kvm->arch.ept_identity_map_addr; | |
b7ebfb05 | 3726 | kvm_userspace_mem.memory_size = PAGE_SIZE; |
47ae31e2 | 3727 | r = __kvm_set_memory_region(kvm, &kvm_userspace_mem); |
b7ebfb05 SY |
3728 | if (r) |
3729 | goto out; | |
3730 | ||
4484141a XG |
3731 | page = gfn_to_page(kvm, kvm->arch.ept_identity_map_addr >> PAGE_SHIFT); |
3732 | if (is_error_page(page)) { | |
3733 | r = -EFAULT; | |
3734 | goto out; | |
3735 | } | |
3736 | ||
3737 | kvm->arch.ept_identity_pagetable = page; | |
b7ebfb05 | 3738 | out: |
79fac95e | 3739 | mutex_unlock(&kvm->slots_lock); |
b7ebfb05 SY |
3740 | return r; |
3741 | } | |
3742 | ||
2384d2b3 SY |
3743 | static void allocate_vpid(struct vcpu_vmx *vmx) |
3744 | { | |
3745 | int vpid; | |
3746 | ||
3747 | vmx->vpid = 0; | |
919818ab | 3748 | if (!enable_vpid) |
2384d2b3 SY |
3749 | return; |
3750 | spin_lock(&vmx_vpid_lock); | |
3751 | vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS); | |
3752 | if (vpid < VMX_NR_VPIDS) { | |
3753 | vmx->vpid = vpid; | |
3754 | __set_bit(vpid, vmx_vpid_bitmap); | |
3755 | } | |
3756 | spin_unlock(&vmx_vpid_lock); | |
3757 | } | |
3758 | ||
cdbecfc3 LJ |
3759 | static void free_vpid(struct vcpu_vmx *vmx) |
3760 | { | |
3761 | if (!enable_vpid) | |
3762 | return; | |
3763 | spin_lock(&vmx_vpid_lock); | |
3764 | if (vmx->vpid != 0) | |
3765 | __clear_bit(vmx->vpid, vmx_vpid_bitmap); | |
3766 | spin_unlock(&vmx_vpid_lock); | |
3767 | } | |
3768 | ||
8d14695f YZ |
3769 | #define MSR_TYPE_R 1 |
3770 | #define MSR_TYPE_W 2 | |
3771 | static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, | |
3772 | u32 msr, int type) | |
25c5f225 | 3773 | { |
3e7c73e9 | 3774 | int f = sizeof(unsigned long); |
25c5f225 SY |
3775 | |
3776 | if (!cpu_has_vmx_msr_bitmap()) | |
3777 | return; | |
3778 | ||
3779 | /* | |
3780 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
3781 | * have the write-low and read-high bitmap offsets the wrong way round. | |
3782 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
3783 | */ | |
25c5f225 | 3784 | if (msr <= 0x1fff) { |
8d14695f YZ |
3785 | if (type & MSR_TYPE_R) |
3786 | /* read-low */ | |
3787 | __clear_bit(msr, msr_bitmap + 0x000 / f); | |
3788 | ||
3789 | if (type & MSR_TYPE_W) | |
3790 | /* write-low */ | |
3791 | __clear_bit(msr, msr_bitmap + 0x800 / f); | |
3792 | ||
25c5f225 SY |
3793 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { |
3794 | msr &= 0x1fff; | |
8d14695f YZ |
3795 | if (type & MSR_TYPE_R) |
3796 | /* read-high */ | |
3797 | __clear_bit(msr, msr_bitmap + 0x400 / f); | |
3798 | ||
3799 | if (type & MSR_TYPE_W) | |
3800 | /* write-high */ | |
3801 | __clear_bit(msr, msr_bitmap + 0xc00 / f); | |
3802 | ||
3803 | } | |
3804 | } | |
3805 | ||
3806 | static void __vmx_enable_intercept_for_msr(unsigned long *msr_bitmap, | |
3807 | u32 msr, int type) | |
3808 | { | |
3809 | int f = sizeof(unsigned long); | |
3810 | ||
3811 | if (!cpu_has_vmx_msr_bitmap()) | |
3812 | return; | |
3813 | ||
3814 | /* | |
3815 | * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals | |
3816 | * have the write-low and read-high bitmap offsets the wrong way round. | |
3817 | * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff. | |
3818 | */ | |
3819 | if (msr <= 0x1fff) { | |
3820 | if (type & MSR_TYPE_R) | |
3821 | /* read-low */ | |
3822 | __set_bit(msr, msr_bitmap + 0x000 / f); | |
3823 | ||
3824 | if (type & MSR_TYPE_W) | |
3825 | /* write-low */ | |
3826 | __set_bit(msr, msr_bitmap + 0x800 / f); | |
3827 | ||
3828 | } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) { | |
3829 | msr &= 0x1fff; | |
3830 | if (type & MSR_TYPE_R) | |
3831 | /* read-high */ | |
3832 | __set_bit(msr, msr_bitmap + 0x400 / f); | |
3833 | ||
3834 | if (type & MSR_TYPE_W) | |
3835 | /* write-high */ | |
3836 | __set_bit(msr, msr_bitmap + 0xc00 / f); | |
3837 | ||
25c5f225 | 3838 | } |
25c5f225 SY |
3839 | } |
3840 | ||
5897297b AK |
3841 | static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only) |
3842 | { | |
3843 | if (!longmode_only) | |
8d14695f YZ |
3844 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy, |
3845 | msr, MSR_TYPE_R | MSR_TYPE_W); | |
3846 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode, | |
3847 | msr, MSR_TYPE_R | MSR_TYPE_W); | |
3848 | } | |
3849 | ||
3850 | static void vmx_enable_intercept_msr_read_x2apic(u32 msr) | |
3851 | { | |
3852 | __vmx_enable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic, | |
3853 | msr, MSR_TYPE_R); | |
3854 | __vmx_enable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic, | |
3855 | msr, MSR_TYPE_R); | |
3856 | } | |
3857 | ||
3858 | static void vmx_disable_intercept_msr_read_x2apic(u32 msr) | |
3859 | { | |
3860 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic, | |
3861 | msr, MSR_TYPE_R); | |
3862 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic, | |
3863 | msr, MSR_TYPE_R); | |
3864 | } | |
3865 | ||
3866 | static void vmx_disable_intercept_msr_write_x2apic(u32 msr) | |
3867 | { | |
3868 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic, | |
3869 | msr, MSR_TYPE_W); | |
3870 | __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic, | |
3871 | msr, MSR_TYPE_W); | |
5897297b AK |
3872 | } |
3873 | ||
a3a8ff8e NHE |
3874 | /* |
3875 | * Set up the vmcs's constant host-state fields, i.e., host-state fields that | |
3876 | * will not change in the lifetime of the guest. | |
3877 | * Note that host-state that does change is set elsewhere. E.g., host-state | |
3878 | * that is set differently for each CPU is set in vmx_vcpu_load(), not here. | |
3879 | */ | |
3880 | static void vmx_set_constant_host_state(void) | |
3881 | { | |
3882 | u32 low32, high32; | |
3883 | unsigned long tmpl; | |
3884 | struct desc_ptr dt; | |
3885 | ||
b1a74bf8 | 3886 | vmcs_writel(HOST_CR0, read_cr0() & ~X86_CR0_TS); /* 22.2.3 */ |
a3a8ff8e NHE |
3887 | vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */ |
3888 | vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */ | |
3889 | ||
3890 | vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */ | |
b2da15ac AK |
3891 | #ifdef CONFIG_X86_64 |
3892 | /* | |
3893 | * Load null selectors, so we can avoid reloading them in | |
3894 | * __vmx_load_host_state(), in case userspace uses the null selectors | |
3895 | * too (the expected case). | |
3896 | */ | |
3897 | vmcs_write16(HOST_DS_SELECTOR, 0); | |
3898 | vmcs_write16(HOST_ES_SELECTOR, 0); | |
3899 | #else | |
a3a8ff8e NHE |
3900 | vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
3901 | vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */ | |
b2da15ac | 3902 | #endif |
a3a8ff8e NHE |
3903 | vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */ |
3904 | vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */ | |
3905 | ||
3906 | native_store_idt(&dt); | |
3907 | vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */ | |
3908 | ||
83287ea4 | 3909 | vmcs_writel(HOST_RIP, vmx_return); /* 22.2.5 */ |
a3a8ff8e NHE |
3910 | |
3911 | rdmsr(MSR_IA32_SYSENTER_CS, low32, high32); | |
3912 | vmcs_write32(HOST_IA32_SYSENTER_CS, low32); | |
3913 | rdmsrl(MSR_IA32_SYSENTER_EIP, tmpl); | |
3914 | vmcs_writel(HOST_IA32_SYSENTER_EIP, tmpl); /* 22.2.3 */ | |
3915 | ||
3916 | if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) { | |
3917 | rdmsr(MSR_IA32_CR_PAT, low32, high32); | |
3918 | vmcs_write64(HOST_IA32_PAT, low32 | ((u64) high32 << 32)); | |
3919 | } | |
3920 | } | |
3921 | ||
bf8179a0 NHE |
3922 | static void set_cr4_guest_host_mask(struct vcpu_vmx *vmx) |
3923 | { | |
3924 | vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS; | |
3925 | if (enable_ept) | |
3926 | vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE; | |
fe3ef05c NHE |
3927 | if (is_guest_mode(&vmx->vcpu)) |
3928 | vmx->vcpu.arch.cr4_guest_owned_bits &= | |
3929 | ~get_vmcs12(&vmx->vcpu)->cr4_guest_host_mask; | |
bf8179a0 NHE |
3930 | vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits); |
3931 | } | |
3932 | ||
3933 | static u32 vmx_exec_control(struct vcpu_vmx *vmx) | |
3934 | { | |
3935 | u32 exec_control = vmcs_config.cpu_based_exec_ctrl; | |
3936 | if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) { | |
3937 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
3938 | #ifdef CONFIG_X86_64 | |
3939 | exec_control |= CPU_BASED_CR8_STORE_EXITING | | |
3940 | CPU_BASED_CR8_LOAD_EXITING; | |
3941 | #endif | |
3942 | } | |
3943 | if (!enable_ept) | |
3944 | exec_control |= CPU_BASED_CR3_STORE_EXITING | | |
3945 | CPU_BASED_CR3_LOAD_EXITING | | |
3946 | CPU_BASED_INVLPG_EXITING; | |
3947 | return exec_control; | |
3948 | } | |
3949 | ||
c7c9c56c YZ |
3950 | static int vmx_vm_has_apicv(struct kvm *kvm) |
3951 | { | |
3952 | return enable_apicv_reg_vid && irqchip_in_kernel(kvm); | |
3953 | } | |
3954 | ||
bf8179a0 NHE |
3955 | static u32 vmx_secondary_exec_control(struct vcpu_vmx *vmx) |
3956 | { | |
3957 | u32 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl; | |
3958 | if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
3959 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
3960 | if (vmx->vpid == 0) | |
3961 | exec_control &= ~SECONDARY_EXEC_ENABLE_VPID; | |
3962 | if (!enable_ept) { | |
3963 | exec_control &= ~SECONDARY_EXEC_ENABLE_EPT; | |
3964 | enable_unrestricted_guest = 0; | |
ad756a16 MJ |
3965 | /* Enable INVPCID for non-ept guests may cause performance regression. */ |
3966 | exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID; | |
bf8179a0 NHE |
3967 | } |
3968 | if (!enable_unrestricted_guest) | |
3969 | exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST; | |
3970 | if (!ple_gap) | |
3971 | exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING; | |
c7c9c56c YZ |
3972 | if (!vmx_vm_has_apicv(vmx->vcpu.kvm)) |
3973 | exec_control &= ~(SECONDARY_EXEC_APIC_REGISTER_VIRT | | |
3974 | SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY); | |
8d14695f | 3975 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; |
bf8179a0 NHE |
3976 | return exec_control; |
3977 | } | |
3978 | ||
ce88decf XG |
3979 | static void ept_set_mmio_spte_mask(void) |
3980 | { | |
3981 | /* | |
3982 | * EPT Misconfigurations can be generated if the value of bits 2:0 | |
3983 | * of an EPT paging-structure entry is 110b (write/execute). | |
3984 | * Also, magic bits (0xffull << 49) is set to quickly identify mmio | |
3985 | * spte. | |
3986 | */ | |
3987 | kvm_mmu_set_mmio_spte_mask(0xffull << 49 | 0x6ull); | |
3988 | } | |
3989 | ||
6aa8b732 AK |
3990 | /* |
3991 | * Sets up the vmcs for emulated real mode. | |
3992 | */ | |
8b9cf98c | 3993 | static int vmx_vcpu_setup(struct vcpu_vmx *vmx) |
6aa8b732 | 3994 | { |
2e4ce7f5 | 3995 | #ifdef CONFIG_X86_64 |
6aa8b732 | 3996 | unsigned long a; |
2e4ce7f5 | 3997 | #endif |
6aa8b732 | 3998 | int i; |
6aa8b732 | 3999 | |
6aa8b732 | 4000 | /* I/O */ |
3e7c73e9 AK |
4001 | vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a)); |
4002 | vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b)); | |
6aa8b732 | 4003 | |
25c5f225 | 4004 | if (cpu_has_vmx_msr_bitmap()) |
5897297b | 4005 | vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy)); |
25c5f225 | 4006 | |
6aa8b732 AK |
4007 | vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */ |
4008 | ||
6aa8b732 | 4009 | /* Control */ |
1c3d14fe YS |
4010 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, |
4011 | vmcs_config.pin_based_exec_ctrl); | |
6e5d865c | 4012 | |
bf8179a0 | 4013 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, vmx_exec_control(vmx)); |
6aa8b732 | 4014 | |
83ff3b9d | 4015 | if (cpu_has_secondary_exec_ctrls()) { |
bf8179a0 NHE |
4016 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, |
4017 | vmx_secondary_exec_control(vmx)); | |
83ff3b9d | 4018 | } |
f78e0e2e | 4019 | |
c7c9c56c YZ |
4020 | if (enable_apicv_reg_vid) { |
4021 | vmcs_write64(EOI_EXIT_BITMAP0, 0); | |
4022 | vmcs_write64(EOI_EXIT_BITMAP1, 0); | |
4023 | vmcs_write64(EOI_EXIT_BITMAP2, 0); | |
4024 | vmcs_write64(EOI_EXIT_BITMAP3, 0); | |
4025 | ||
4026 | vmcs_write16(GUEST_INTR_STATUS, 0); | |
4027 | } | |
4028 | ||
4b8d54f9 ZE |
4029 | if (ple_gap) { |
4030 | vmcs_write32(PLE_GAP, ple_gap); | |
4031 | vmcs_write32(PLE_WINDOW, ple_window); | |
4032 | } | |
4033 | ||
c3707958 XG |
4034 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0); |
4035 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0); | |
6aa8b732 AK |
4036 | vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */ |
4037 | ||
9581d442 AK |
4038 | vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */ |
4039 | vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */ | |
a3a8ff8e | 4040 | vmx_set_constant_host_state(); |
05b3e0c2 | 4041 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
4042 | rdmsrl(MSR_FS_BASE, a); |
4043 | vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */ | |
4044 | rdmsrl(MSR_GS_BASE, a); | |
4045 | vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */ | |
4046 | #else | |
4047 | vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */ | |
4048 | vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */ | |
4049 | #endif | |
4050 | ||
2cc51560 ED |
4051 | vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); |
4052 | vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); | |
61d2ef2c | 4053 | vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host)); |
2cc51560 | 4054 | vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0); |
61d2ef2c | 4055 | vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest)); |
6aa8b732 | 4056 | |
468d472f | 4057 | if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { |
a3a8ff8e NHE |
4058 | u32 msr_low, msr_high; |
4059 | u64 host_pat; | |
468d472f SY |
4060 | rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high); |
4061 | host_pat = msr_low | ((u64) msr_high << 32); | |
4062 | /* Write the default value follow host pat */ | |
4063 | vmcs_write64(GUEST_IA32_PAT, host_pat); | |
4064 | /* Keep arch.pat sync with GUEST_IA32_PAT */ | |
4065 | vmx->vcpu.arch.pat = host_pat; | |
4066 | } | |
4067 | ||
6aa8b732 AK |
4068 | for (i = 0; i < NR_VMX_MSR; ++i) { |
4069 | u32 index = vmx_msr_index[i]; | |
4070 | u32 data_low, data_high; | |
a2fa3e9f | 4071 | int j = vmx->nmsrs; |
6aa8b732 AK |
4072 | |
4073 | if (rdmsr_safe(index, &data_low, &data_high) < 0) | |
4074 | continue; | |
432bd6cb AK |
4075 | if (wrmsr_safe(index, data_low, data_high) < 0) |
4076 | continue; | |
26bb0981 AK |
4077 | vmx->guest_msrs[j].index = i; |
4078 | vmx->guest_msrs[j].data = 0; | |
d5696725 | 4079 | vmx->guest_msrs[j].mask = -1ull; |
a2fa3e9f | 4080 | ++vmx->nmsrs; |
6aa8b732 | 4081 | } |
6aa8b732 | 4082 | |
1c3d14fe | 4083 | vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl); |
6aa8b732 AK |
4084 | |
4085 | /* 22.2.1, 20.8.1 */ | |
1c3d14fe YS |
4086 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl); |
4087 | ||
e00c8cf2 | 4088 | vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL); |
bf8179a0 | 4089 | set_cr4_guest_host_mask(vmx); |
e00c8cf2 AK |
4090 | |
4091 | return 0; | |
4092 | } | |
4093 | ||
4094 | static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) | |
4095 | { | |
4096 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4097 | u64 msr; | |
4b9d3a04 | 4098 | int ret; |
e00c8cf2 | 4099 | |
7ffd92c5 | 4100 | vmx->rmode.vm86_active = 0; |
e00c8cf2 | 4101 | |
3b86cd99 JK |
4102 | vmx->soft_vnmi_blocked = 0; |
4103 | ||
ad312c7c | 4104 | vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); |
2d3ad1f4 | 4105 | kvm_set_cr8(&vmx->vcpu, 0); |
e00c8cf2 | 4106 | msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 4107 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
e00c8cf2 AK |
4108 | msr |= MSR_IA32_APICBASE_BSP; |
4109 | kvm_set_apic_base(&vmx->vcpu, msr); | |
4110 | ||
2fb92db1 AK |
4111 | vmx_segment_cache_clear(vmx); |
4112 | ||
5706be0d | 4113 | seg_setup(VCPU_SREG_CS); |
d54d07b2 | 4114 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
e00c8cf2 | 4115 | vmcs_write16(GUEST_CS_SELECTOR, 0xf000); |
d54d07b2 | 4116 | else { |
ad312c7c ZX |
4117 | vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8); |
4118 | vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12); | |
e00c8cf2 | 4119 | } |
e00c8cf2 AK |
4120 | |
4121 | seg_setup(VCPU_SREG_DS); | |
4122 | seg_setup(VCPU_SREG_ES); | |
4123 | seg_setup(VCPU_SREG_FS); | |
4124 | seg_setup(VCPU_SREG_GS); | |
4125 | seg_setup(VCPU_SREG_SS); | |
4126 | ||
4127 | vmcs_write16(GUEST_TR_SELECTOR, 0); | |
4128 | vmcs_writel(GUEST_TR_BASE, 0); | |
4129 | vmcs_write32(GUEST_TR_LIMIT, 0xffff); | |
4130 | vmcs_write32(GUEST_TR_AR_BYTES, 0x008b); | |
4131 | ||
4132 | vmcs_write16(GUEST_LDTR_SELECTOR, 0); | |
4133 | vmcs_writel(GUEST_LDTR_BASE, 0); | |
4134 | vmcs_write32(GUEST_LDTR_LIMIT, 0xffff); | |
4135 | vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082); | |
4136 | ||
4137 | vmcs_write32(GUEST_SYSENTER_CS, 0); | |
4138 | vmcs_writel(GUEST_SYSENTER_ESP, 0); | |
4139 | vmcs_writel(GUEST_SYSENTER_EIP, 0); | |
4140 | ||
4141 | vmcs_writel(GUEST_RFLAGS, 0x02); | |
c5af89b6 | 4142 | if (kvm_vcpu_is_bsp(&vmx->vcpu)) |
5fdbf976 | 4143 | kvm_rip_write(vcpu, 0xfff0); |
e00c8cf2 | 4144 | else |
5fdbf976 | 4145 | kvm_rip_write(vcpu, 0); |
e00c8cf2 | 4146 | |
e00c8cf2 AK |
4147 | vmcs_writel(GUEST_GDTR_BASE, 0); |
4148 | vmcs_write32(GUEST_GDTR_LIMIT, 0xffff); | |
4149 | ||
4150 | vmcs_writel(GUEST_IDTR_BASE, 0); | |
4151 | vmcs_write32(GUEST_IDTR_LIMIT, 0xffff); | |
4152 | ||
443381a8 | 4153 | vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE); |
e00c8cf2 AK |
4154 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0); |
4155 | vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0); | |
4156 | ||
e00c8cf2 AK |
4157 | /* Special registers */ |
4158 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
4159 | ||
4160 | setup_msrs(vmx); | |
4161 | ||
6aa8b732 AK |
4162 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */ |
4163 | ||
f78e0e2e SY |
4164 | if (cpu_has_vmx_tpr_shadow()) { |
4165 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0); | |
4166 | if (vm_need_tpr_shadow(vmx->vcpu.kvm)) | |
4167 | vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, | |
afc20184 | 4168 | __pa(vmx->vcpu.arch.apic->regs)); |
f78e0e2e SY |
4169 | vmcs_write32(TPR_THRESHOLD, 0); |
4170 | } | |
4171 | ||
4172 | if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm)) | |
4173 | vmcs_write64(APIC_ACCESS_ADDR, | |
bfc6d222 | 4174 | page_to_phys(vmx->vcpu.kvm->arch.apic_access_page)); |
6aa8b732 | 4175 | |
2384d2b3 SY |
4176 | if (vmx->vpid != 0) |
4177 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
4178 | ||
fa40052c | 4179 | vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET; |
7a4f5ad0 | 4180 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
4d4ec087 | 4181 | vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */ |
7a4f5ad0 | 4182 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
8b9cf98c | 4183 | vmx_set_cr4(&vmx->vcpu, 0); |
8b9cf98c | 4184 | vmx_set_efer(&vmx->vcpu, 0); |
8b9cf98c RR |
4185 | vmx_fpu_activate(&vmx->vcpu); |
4186 | update_exception_bitmap(&vmx->vcpu); | |
6aa8b732 | 4187 | |
b9d762fa | 4188 | vpid_sync_context(vmx); |
2384d2b3 | 4189 | |
3200f405 | 4190 | ret = 0; |
6aa8b732 | 4191 | |
6aa8b732 AK |
4192 | return ret; |
4193 | } | |
4194 | ||
b6f1250e NHE |
4195 | /* |
4196 | * In nested virtualization, check if L1 asked to exit on external interrupts. | |
4197 | * For most existing hypervisors, this will always return true. | |
4198 | */ | |
4199 | static bool nested_exit_on_intr(struct kvm_vcpu *vcpu) | |
4200 | { | |
4201 | return get_vmcs12(vcpu)->pin_based_vm_exec_control & | |
4202 | PIN_BASED_EXT_INTR_MASK; | |
4203 | } | |
4204 | ||
3b86cd99 JK |
4205 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
4206 | { | |
4207 | u32 cpu_based_vm_exec_control; | |
d6185f20 NHE |
4208 | if (is_guest_mode(vcpu) && nested_exit_on_intr(vcpu)) { |
4209 | /* | |
4210 | * We get here if vmx_interrupt_allowed() said we can't | |
4211 | * inject to L1 now because L2 must run. Ask L2 to exit | |
4212 | * right after entry, so we can inject to L1 more promptly. | |
b6f1250e | 4213 | */ |
d6185f20 | 4214 | kvm_make_request(KVM_REQ_IMMEDIATE_EXIT, vcpu); |
b6f1250e | 4215 | return; |
d6185f20 | 4216 | } |
3b86cd99 JK |
4217 | |
4218 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
4219 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING; | |
4220 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
4221 | } | |
4222 | ||
4223 | static void enable_nmi_window(struct kvm_vcpu *vcpu) | |
4224 | { | |
4225 | u32 cpu_based_vm_exec_control; | |
4226 | ||
4227 | if (!cpu_has_virtual_nmis()) { | |
4228 | enable_irq_window(vcpu); | |
4229 | return; | |
4230 | } | |
4231 | ||
30bd0c4c AK |
4232 | if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) { |
4233 | enable_irq_window(vcpu); | |
4234 | return; | |
4235 | } | |
3b86cd99 JK |
4236 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); |
4237 | cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING; | |
4238 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
4239 | } | |
4240 | ||
66fd3f7f | 4241 | static void vmx_inject_irq(struct kvm_vcpu *vcpu) |
85f455f7 | 4242 | { |
9c8cba37 | 4243 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
66fd3f7f GN |
4244 | uint32_t intr; |
4245 | int irq = vcpu->arch.interrupt.nr; | |
9c8cba37 | 4246 | |
229456fc | 4247 | trace_kvm_inj_virq(irq); |
2714d1d3 | 4248 | |
fa89a817 | 4249 | ++vcpu->stat.irq_injections; |
7ffd92c5 | 4250 | if (vmx->rmode.vm86_active) { |
71f9833b SH |
4251 | int inc_eip = 0; |
4252 | if (vcpu->arch.interrupt.soft) | |
4253 | inc_eip = vcpu->arch.event_exit_inst_len; | |
4254 | if (kvm_inject_realmode_interrupt(vcpu, irq, inc_eip) != EMULATE_DONE) | |
a92601bb | 4255 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
85f455f7 ED |
4256 | return; |
4257 | } | |
66fd3f7f GN |
4258 | intr = irq | INTR_INFO_VALID_MASK; |
4259 | if (vcpu->arch.interrupt.soft) { | |
4260 | intr |= INTR_TYPE_SOFT_INTR; | |
4261 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
4262 | vmx->vcpu.arch.event_exit_inst_len); | |
4263 | } else | |
4264 | intr |= INTR_TYPE_EXT_INTR; | |
4265 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr); | |
85f455f7 ED |
4266 | } |
4267 | ||
f08864b4 SY |
4268 | static void vmx_inject_nmi(struct kvm_vcpu *vcpu) |
4269 | { | |
66a5a347 JK |
4270 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
4271 | ||
0b6ac343 NHE |
4272 | if (is_guest_mode(vcpu)) |
4273 | return; | |
4274 | ||
3b86cd99 JK |
4275 | if (!cpu_has_virtual_nmis()) { |
4276 | /* | |
4277 | * Tracking the NMI-blocked state in software is built upon | |
4278 | * finding the next open IRQ window. This, in turn, depends on | |
4279 | * well-behaving guests: They have to keep IRQs disabled at | |
4280 | * least as long as the NMI handler runs. Otherwise we may | |
4281 | * cause NMI nesting, maybe breaking the guest. But as this is | |
4282 | * highly unlikely, we can live with the residual risk. | |
4283 | */ | |
4284 | vmx->soft_vnmi_blocked = 1; | |
4285 | vmx->vnmi_blocked_time = 0; | |
4286 | } | |
4287 | ||
487b391d | 4288 | ++vcpu->stat.nmi_injections; |
9d58b931 | 4289 | vmx->nmi_known_unmasked = false; |
7ffd92c5 | 4290 | if (vmx->rmode.vm86_active) { |
71f9833b | 4291 | if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE) |
a92601bb | 4292 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); |
66a5a347 JK |
4293 | return; |
4294 | } | |
f08864b4 SY |
4295 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, |
4296 | INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR); | |
f08864b4 SY |
4297 | } |
4298 | ||
c4282df9 | 4299 | static int vmx_nmi_allowed(struct kvm_vcpu *vcpu) |
33f089ca | 4300 | { |
3b86cd99 | 4301 | if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked) |
c4282df9 | 4302 | return 0; |
33f089ca | 4303 | |
c4282df9 | 4304 | return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & |
30bd0c4c AK |
4305 | (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI |
4306 | | GUEST_INTR_STATE_NMI)); | |
33f089ca JK |
4307 | } |
4308 | ||
3cfc3092 JK |
4309 | static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu) |
4310 | { | |
4311 | if (!cpu_has_virtual_nmis()) | |
4312 | return to_vmx(vcpu)->soft_vnmi_blocked; | |
9d58b931 AK |
4313 | if (to_vmx(vcpu)->nmi_known_unmasked) |
4314 | return false; | |
c332c83a | 4315 | return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI; |
3cfc3092 JK |
4316 | } |
4317 | ||
4318 | static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
4319 | { | |
4320 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
4321 | ||
4322 | if (!cpu_has_virtual_nmis()) { | |
4323 | if (vmx->soft_vnmi_blocked != masked) { | |
4324 | vmx->soft_vnmi_blocked = masked; | |
4325 | vmx->vnmi_blocked_time = 0; | |
4326 | } | |
4327 | } else { | |
9d58b931 | 4328 | vmx->nmi_known_unmasked = !masked; |
3cfc3092 JK |
4329 | if (masked) |
4330 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, | |
4331 | GUEST_INTR_STATE_NMI); | |
4332 | else | |
4333 | vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO, | |
4334 | GUEST_INTR_STATE_NMI); | |
4335 | } | |
4336 | } | |
4337 | ||
78646121 GN |
4338 | static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu) |
4339 | { | |
b6f1250e | 4340 | if (is_guest_mode(vcpu) && nested_exit_on_intr(vcpu)) { |
51cfe38e NHE |
4341 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); |
4342 | if (to_vmx(vcpu)->nested.nested_run_pending || | |
4343 | (vmcs12->idt_vectoring_info_field & | |
4344 | VECTORING_INFO_VALID_MASK)) | |
b6f1250e NHE |
4345 | return 0; |
4346 | nested_vmx_vmexit(vcpu); | |
b6f1250e NHE |
4347 | vmcs12->vm_exit_reason = EXIT_REASON_EXTERNAL_INTERRUPT; |
4348 | vmcs12->vm_exit_intr_info = 0; | |
4349 | /* fall through to normal code, but now in L1, not L2 */ | |
4350 | } | |
4351 | ||
c4282df9 GN |
4352 | return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) && |
4353 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & | |
4354 | (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); | |
78646121 GN |
4355 | } |
4356 | ||
cbc94022 IE |
4357 | static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) |
4358 | { | |
4359 | int ret; | |
4360 | struct kvm_userspace_memory_region tss_mem = { | |
6fe63979 | 4361 | .slot = TSS_PRIVATE_MEMSLOT, |
cbc94022 IE |
4362 | .guest_phys_addr = addr, |
4363 | .memory_size = PAGE_SIZE * 3, | |
4364 | .flags = 0, | |
4365 | }; | |
4366 | ||
47ae31e2 | 4367 | ret = kvm_set_memory_region(kvm, &tss_mem); |
cbc94022 IE |
4368 | if (ret) |
4369 | return ret; | |
bfc6d222 | 4370 | kvm->arch.tss_addr = addr; |
93ea5388 GN |
4371 | if (!init_rmode_tss(kvm)) |
4372 | return -ENOMEM; | |
4373 | ||
cbc94022 IE |
4374 | return 0; |
4375 | } | |
4376 | ||
0ca1b4f4 | 4377 | static bool rmode_exception(struct kvm_vcpu *vcpu, int vec) |
6aa8b732 | 4378 | { |
77ab6db0 | 4379 | switch (vec) { |
77ab6db0 | 4380 | case BP_VECTOR: |
c573cd22 JK |
4381 | /* |
4382 | * Update instruction length as we may reinject the exception | |
4383 | * from user space while in guest debugging mode. | |
4384 | */ | |
4385 | to_vmx(vcpu)->vcpu.arch.event_exit_inst_len = | |
4386 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
d0bfb940 | 4387 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
0ca1b4f4 GN |
4388 | return false; |
4389 | /* fall through */ | |
4390 | case DB_VECTOR: | |
4391 | if (vcpu->guest_debug & | |
4392 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
4393 | return false; | |
d0bfb940 JK |
4394 | /* fall through */ |
4395 | case DE_VECTOR: | |
77ab6db0 JK |
4396 | case OF_VECTOR: |
4397 | case BR_VECTOR: | |
4398 | case UD_VECTOR: | |
4399 | case DF_VECTOR: | |
4400 | case SS_VECTOR: | |
4401 | case GP_VECTOR: | |
4402 | case MF_VECTOR: | |
0ca1b4f4 GN |
4403 | return true; |
4404 | break; | |
77ab6db0 | 4405 | } |
0ca1b4f4 GN |
4406 | return false; |
4407 | } | |
4408 | ||
4409 | static int handle_rmode_exception(struct kvm_vcpu *vcpu, | |
4410 | int vec, u32 err_code) | |
4411 | { | |
4412 | /* | |
4413 | * Instruction with address size override prefix opcode 0x67 | |
4414 | * Cause the #SS fault with 0 error code in VM86 mode. | |
4415 | */ | |
4416 | if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) { | |
4417 | if (emulate_instruction(vcpu, 0) == EMULATE_DONE) { | |
4418 | if (vcpu->arch.halt_request) { | |
4419 | vcpu->arch.halt_request = 0; | |
4420 | return kvm_emulate_halt(vcpu); | |
4421 | } | |
4422 | return 1; | |
4423 | } | |
4424 | return 0; | |
4425 | } | |
4426 | ||
4427 | /* | |
4428 | * Forward all other exceptions that are valid in real mode. | |
4429 | * FIXME: Breaks guest debugging in real mode, needs to be fixed with | |
4430 | * the required debugging infrastructure rework. | |
4431 | */ | |
4432 | kvm_queue_exception(vcpu, vec); | |
4433 | return 1; | |
6aa8b732 AK |
4434 | } |
4435 | ||
a0861c02 AK |
4436 | /* |
4437 | * Trigger machine check on the host. We assume all the MSRs are already set up | |
4438 | * by the CPU and that we still run on the same CPU as the MCE occurred on. | |
4439 | * We pass a fake environment to the machine check handler because we want | |
4440 | * the guest to be always treated like user space, no matter what context | |
4441 | * it used internally. | |
4442 | */ | |
4443 | static void kvm_machine_check(void) | |
4444 | { | |
4445 | #if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64) | |
4446 | struct pt_regs regs = { | |
4447 | .cs = 3, /* Fake ring 3 no matter what the guest ran on */ | |
4448 | .flags = X86_EFLAGS_IF, | |
4449 | }; | |
4450 | ||
4451 | do_machine_check(®s, 0); | |
4452 | #endif | |
4453 | } | |
4454 | ||
851ba692 | 4455 | static int handle_machine_check(struct kvm_vcpu *vcpu) |
a0861c02 AK |
4456 | { |
4457 | /* already handled by vcpu_run */ | |
4458 | return 1; | |
4459 | } | |
4460 | ||
851ba692 | 4461 | static int handle_exception(struct kvm_vcpu *vcpu) |
6aa8b732 | 4462 | { |
1155f76a | 4463 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
851ba692 | 4464 | struct kvm_run *kvm_run = vcpu->run; |
d0bfb940 | 4465 | u32 intr_info, ex_no, error_code; |
42dbaa5a | 4466 | unsigned long cr2, rip, dr6; |
6aa8b732 AK |
4467 | u32 vect_info; |
4468 | enum emulation_result er; | |
4469 | ||
1155f76a | 4470 | vect_info = vmx->idt_vectoring_info; |
88786475 | 4471 | intr_info = vmx->exit_intr_info; |
6aa8b732 | 4472 | |
a0861c02 | 4473 | if (is_machine_check(intr_info)) |
851ba692 | 4474 | return handle_machine_check(vcpu); |
a0861c02 | 4475 | |
e4a41889 | 4476 | if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR) |
1b6269db | 4477 | return 1; /* already handled by vmx_vcpu_run() */ |
2ab455cc AL |
4478 | |
4479 | if (is_no_device(intr_info)) { | |
5fd86fcf | 4480 | vmx_fpu_activate(vcpu); |
2ab455cc AL |
4481 | return 1; |
4482 | } | |
4483 | ||
7aa81cc0 | 4484 | if (is_invalid_opcode(intr_info)) { |
51d8b661 | 4485 | er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD); |
7aa81cc0 | 4486 | if (er != EMULATE_DONE) |
7ee5d940 | 4487 | kvm_queue_exception(vcpu, UD_VECTOR); |
7aa81cc0 AL |
4488 | return 1; |
4489 | } | |
4490 | ||
6aa8b732 | 4491 | error_code = 0; |
2e11384c | 4492 | if (intr_info & INTR_INFO_DELIVER_CODE_MASK) |
6aa8b732 | 4493 | error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); |
bf4ca23e XG |
4494 | |
4495 | /* | |
4496 | * The #PF with PFEC.RSVD = 1 indicates the guest is accessing | |
4497 | * MMIO, it is better to report an internal error. | |
4498 | * See the comments in vmx_handle_exit. | |
4499 | */ | |
4500 | if ((vect_info & VECTORING_INFO_VALID_MASK) && | |
4501 | !(is_page_fault(intr_info) && !(error_code & PFERR_RSVD_MASK))) { | |
4502 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
4503 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX; | |
4504 | vcpu->run->internal.ndata = 2; | |
4505 | vcpu->run->internal.data[0] = vect_info; | |
4506 | vcpu->run->internal.data[1] = intr_info; | |
4507 | return 0; | |
4508 | } | |
4509 | ||
6aa8b732 | 4510 | if (is_page_fault(intr_info)) { |
1439442c | 4511 | /* EPT won't cause page fault directly */ |
cf3ace79 | 4512 | BUG_ON(enable_ept); |
6aa8b732 | 4513 | cr2 = vmcs_readl(EXIT_QUALIFICATION); |
229456fc MT |
4514 | trace_kvm_page_fault(cr2, error_code); |
4515 | ||
3298b75c | 4516 | if (kvm_event_needs_reinjection(vcpu)) |
577bdc49 | 4517 | kvm_mmu_unprotect_page_virt(vcpu, cr2); |
dc25e89e | 4518 | return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0); |
6aa8b732 AK |
4519 | } |
4520 | ||
d0bfb940 | 4521 | ex_no = intr_info & INTR_INFO_VECTOR_MASK; |
0ca1b4f4 GN |
4522 | |
4523 | if (vmx->rmode.vm86_active && rmode_exception(vcpu, ex_no)) | |
4524 | return handle_rmode_exception(vcpu, ex_no, error_code); | |
4525 | ||
42dbaa5a JK |
4526 | switch (ex_no) { |
4527 | case DB_VECTOR: | |
4528 | dr6 = vmcs_readl(EXIT_QUALIFICATION); | |
4529 | if (!(vcpu->guest_debug & | |
4530 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { | |
4531 | vcpu->arch.dr6 = dr6 | DR6_FIXED_1; | |
4532 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4533 | return 1; | |
4534 | } | |
4535 | kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1; | |
4536 | kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7); | |
4537 | /* fall through */ | |
4538 | case BP_VECTOR: | |
c573cd22 JK |
4539 | /* |
4540 | * Update instruction length as we may reinject #BP from | |
4541 | * user space while in guest debugging mode. Reading it for | |
4542 | * #DB as well causes no harm, it is not used in that case. | |
4543 | */ | |
4544 | vmx->vcpu.arch.event_exit_inst_len = | |
4545 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6aa8b732 | 4546 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
0a434bb2 | 4547 | rip = kvm_rip_read(vcpu); |
d0bfb940 JK |
4548 | kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip; |
4549 | kvm_run->debug.arch.exception = ex_no; | |
42dbaa5a JK |
4550 | break; |
4551 | default: | |
d0bfb940 JK |
4552 | kvm_run->exit_reason = KVM_EXIT_EXCEPTION; |
4553 | kvm_run->ex.exception = ex_no; | |
4554 | kvm_run->ex.error_code = error_code; | |
42dbaa5a | 4555 | break; |
6aa8b732 | 4556 | } |
6aa8b732 AK |
4557 | return 0; |
4558 | } | |
4559 | ||
851ba692 | 4560 | static int handle_external_interrupt(struct kvm_vcpu *vcpu) |
6aa8b732 | 4561 | { |
1165f5fe | 4562 | ++vcpu->stat.irq_exits; |
6aa8b732 AK |
4563 | return 1; |
4564 | } | |
4565 | ||
851ba692 | 4566 | static int handle_triple_fault(struct kvm_vcpu *vcpu) |
988ad74f | 4567 | { |
851ba692 | 4568 | vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; |
988ad74f AK |
4569 | return 0; |
4570 | } | |
6aa8b732 | 4571 | |
851ba692 | 4572 | static int handle_io(struct kvm_vcpu *vcpu) |
6aa8b732 | 4573 | { |
bfdaab09 | 4574 | unsigned long exit_qualification; |
34c33d16 | 4575 | int size, in, string; |
039576c0 | 4576 | unsigned port; |
6aa8b732 | 4577 | |
bfdaab09 | 4578 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
039576c0 | 4579 | string = (exit_qualification & 16) != 0; |
cf8f70bf | 4580 | in = (exit_qualification & 8) != 0; |
e70669ab | 4581 | |
cf8f70bf | 4582 | ++vcpu->stat.io_exits; |
e70669ab | 4583 | |
cf8f70bf | 4584 | if (string || in) |
51d8b661 | 4585 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
e70669ab | 4586 | |
cf8f70bf GN |
4587 | port = exit_qualification >> 16; |
4588 | size = (exit_qualification & 7) + 1; | |
e93f36bc | 4589 | skip_emulated_instruction(vcpu); |
cf8f70bf GN |
4590 | |
4591 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
4592 | } |
4593 | ||
102d8325 IM |
4594 | static void |
4595 | vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
4596 | { | |
4597 | /* | |
4598 | * Patch in the VMCALL instruction: | |
4599 | */ | |
4600 | hypercall[0] = 0x0f; | |
4601 | hypercall[1] = 0x01; | |
4602 | hypercall[2] = 0xc1; | |
102d8325 IM |
4603 | } |
4604 | ||
0fa06071 | 4605 | /* called to set cr0 as appropriate for a mov-to-cr0 exit. */ |
eeadf9e7 NHE |
4606 | static int handle_set_cr0(struct kvm_vcpu *vcpu, unsigned long val) |
4607 | { | |
4608 | if (to_vmx(vcpu)->nested.vmxon && | |
4609 | ((val & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON)) | |
4610 | return 1; | |
4611 | ||
4612 | if (is_guest_mode(vcpu)) { | |
4613 | /* | |
4614 | * We get here when L2 changed cr0 in a way that did not change | |
4615 | * any of L1's shadowed bits (see nested_vmx_exit_handled_cr), | |
4616 | * but did change L0 shadowed bits. This can currently happen | |
4617 | * with the TS bit: L0 may want to leave TS on (for lazy fpu | |
4618 | * loading) while pretending to allow the guest to change it. | |
4619 | */ | |
4620 | if (kvm_set_cr0(vcpu, (val & vcpu->arch.cr0_guest_owned_bits) | | |
4621 | (vcpu->arch.cr0 & ~vcpu->arch.cr0_guest_owned_bits))) | |
4622 | return 1; | |
4623 | vmcs_writel(CR0_READ_SHADOW, val); | |
4624 | return 0; | |
4625 | } else | |
4626 | return kvm_set_cr0(vcpu, val); | |
4627 | } | |
4628 | ||
4629 | static int handle_set_cr4(struct kvm_vcpu *vcpu, unsigned long val) | |
4630 | { | |
4631 | if (is_guest_mode(vcpu)) { | |
4632 | if (kvm_set_cr4(vcpu, (val & vcpu->arch.cr4_guest_owned_bits) | | |
4633 | (vcpu->arch.cr4 & ~vcpu->arch.cr4_guest_owned_bits))) | |
4634 | return 1; | |
4635 | vmcs_writel(CR4_READ_SHADOW, val); | |
4636 | return 0; | |
4637 | } else | |
4638 | return kvm_set_cr4(vcpu, val); | |
4639 | } | |
4640 | ||
4641 | /* called to set cr0 as approriate for clts instruction exit. */ | |
4642 | static void handle_clts(struct kvm_vcpu *vcpu) | |
4643 | { | |
4644 | if (is_guest_mode(vcpu)) { | |
4645 | /* | |
4646 | * We get here when L2 did CLTS, and L1 didn't shadow CR0.TS | |
4647 | * but we did (!fpu_active). We need to keep GUEST_CR0.TS on, | |
4648 | * just pretend it's off (also in arch.cr0 for fpu_activate). | |
4649 | */ | |
4650 | vmcs_writel(CR0_READ_SHADOW, | |
4651 | vmcs_readl(CR0_READ_SHADOW) & ~X86_CR0_TS); | |
4652 | vcpu->arch.cr0 &= ~X86_CR0_TS; | |
4653 | } else | |
4654 | vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS)); | |
4655 | } | |
4656 | ||
851ba692 | 4657 | static int handle_cr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4658 | { |
229456fc | 4659 | unsigned long exit_qualification, val; |
6aa8b732 AK |
4660 | int cr; |
4661 | int reg; | |
49a9b07e | 4662 | int err; |
6aa8b732 | 4663 | |
bfdaab09 | 4664 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
6aa8b732 AK |
4665 | cr = exit_qualification & 15; |
4666 | reg = (exit_qualification >> 8) & 15; | |
4667 | switch ((exit_qualification >> 4) & 3) { | |
4668 | case 0: /* mov to cr */ | |
229456fc MT |
4669 | val = kvm_register_read(vcpu, reg); |
4670 | trace_kvm_cr_write(cr, val); | |
6aa8b732 AK |
4671 | switch (cr) { |
4672 | case 0: | |
eeadf9e7 | 4673 | err = handle_set_cr0(vcpu, val); |
db8fcefa | 4674 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
4675 | return 1; |
4676 | case 3: | |
2390218b | 4677 | err = kvm_set_cr3(vcpu, val); |
db8fcefa | 4678 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 AK |
4679 | return 1; |
4680 | case 4: | |
eeadf9e7 | 4681 | err = handle_set_cr4(vcpu, val); |
db8fcefa | 4682 | kvm_complete_insn_gp(vcpu, err); |
6aa8b732 | 4683 | return 1; |
0a5fff19 GN |
4684 | case 8: { |
4685 | u8 cr8_prev = kvm_get_cr8(vcpu); | |
4686 | u8 cr8 = kvm_register_read(vcpu, reg); | |
eea1cff9 | 4687 | err = kvm_set_cr8(vcpu, cr8); |
db8fcefa | 4688 | kvm_complete_insn_gp(vcpu, err); |
0a5fff19 GN |
4689 | if (irqchip_in_kernel(vcpu->kvm)) |
4690 | return 1; | |
4691 | if (cr8_prev <= cr8) | |
4692 | return 1; | |
851ba692 | 4693 | vcpu->run->exit_reason = KVM_EXIT_SET_TPR; |
0a5fff19 GN |
4694 | return 0; |
4695 | } | |
4b8073e4 | 4696 | } |
6aa8b732 | 4697 | break; |
25c4c276 | 4698 | case 2: /* clts */ |
eeadf9e7 | 4699 | handle_clts(vcpu); |
4d4ec087 | 4700 | trace_kvm_cr_write(0, kvm_read_cr0(vcpu)); |
25c4c276 | 4701 | skip_emulated_instruction(vcpu); |
6b52d186 | 4702 | vmx_fpu_activate(vcpu); |
25c4c276 | 4703 | return 1; |
6aa8b732 AK |
4704 | case 1: /*mov from cr*/ |
4705 | switch (cr) { | |
4706 | case 3: | |
9f8fe504 AK |
4707 | val = kvm_read_cr3(vcpu); |
4708 | kvm_register_write(vcpu, reg, val); | |
4709 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
4710 | skip_emulated_instruction(vcpu); |
4711 | return 1; | |
4712 | case 8: | |
229456fc MT |
4713 | val = kvm_get_cr8(vcpu); |
4714 | kvm_register_write(vcpu, reg, val); | |
4715 | trace_kvm_cr_read(cr, val); | |
6aa8b732 AK |
4716 | skip_emulated_instruction(vcpu); |
4717 | return 1; | |
4718 | } | |
4719 | break; | |
4720 | case 3: /* lmsw */ | |
a1f83a74 | 4721 | val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f; |
4d4ec087 | 4722 | trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val); |
a1f83a74 | 4723 | kvm_lmsw(vcpu, val); |
6aa8b732 AK |
4724 | |
4725 | skip_emulated_instruction(vcpu); | |
4726 | return 1; | |
4727 | default: | |
4728 | break; | |
4729 | } | |
851ba692 | 4730 | vcpu->run->exit_reason = 0; |
a737f256 | 4731 | vcpu_unimpl(vcpu, "unhandled control register: op %d cr %d\n", |
6aa8b732 AK |
4732 | (int)(exit_qualification >> 4) & 3, cr); |
4733 | return 0; | |
4734 | } | |
4735 | ||
851ba692 | 4736 | static int handle_dr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4737 | { |
bfdaab09 | 4738 | unsigned long exit_qualification; |
6aa8b732 AK |
4739 | int dr, reg; |
4740 | ||
f2483415 | 4741 | /* Do not handle if the CPL > 0, will trigger GP on re-entry */ |
0a79b009 AK |
4742 | if (!kvm_require_cpl(vcpu, 0)) |
4743 | return 1; | |
42dbaa5a JK |
4744 | dr = vmcs_readl(GUEST_DR7); |
4745 | if (dr & DR7_GD) { | |
4746 | /* | |
4747 | * As the vm-exit takes precedence over the debug trap, we | |
4748 | * need to emulate the latter, either for the host or the | |
4749 | * guest debugging itself. | |
4750 | */ | |
4751 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { | |
851ba692 AK |
4752 | vcpu->run->debug.arch.dr6 = vcpu->arch.dr6; |
4753 | vcpu->run->debug.arch.dr7 = dr; | |
4754 | vcpu->run->debug.arch.pc = | |
42dbaa5a JK |
4755 | vmcs_readl(GUEST_CS_BASE) + |
4756 | vmcs_readl(GUEST_RIP); | |
851ba692 AK |
4757 | vcpu->run->debug.arch.exception = DB_VECTOR; |
4758 | vcpu->run->exit_reason = KVM_EXIT_DEBUG; | |
42dbaa5a JK |
4759 | return 0; |
4760 | } else { | |
4761 | vcpu->arch.dr7 &= ~DR7_GD; | |
4762 | vcpu->arch.dr6 |= DR6_BD; | |
4763 | vmcs_writel(GUEST_DR7, vcpu->arch.dr7); | |
4764 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4765 | return 1; | |
4766 | } | |
4767 | } | |
4768 | ||
bfdaab09 | 4769 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
42dbaa5a JK |
4770 | dr = exit_qualification & DEBUG_REG_ACCESS_NUM; |
4771 | reg = DEBUG_REG_ACCESS_REG(exit_qualification); | |
4772 | if (exit_qualification & TYPE_MOV_FROM_DR) { | |
020df079 GN |
4773 | unsigned long val; |
4774 | if (!kvm_get_dr(vcpu, dr, &val)) | |
4775 | kvm_register_write(vcpu, reg, val); | |
4776 | } else | |
4777 | kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]); | |
6aa8b732 AK |
4778 | skip_emulated_instruction(vcpu); |
4779 | return 1; | |
4780 | } | |
4781 | ||
020df079 GN |
4782 | static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val) |
4783 | { | |
4784 | vmcs_writel(GUEST_DR7, val); | |
4785 | } | |
4786 | ||
851ba692 | 4787 | static int handle_cpuid(struct kvm_vcpu *vcpu) |
6aa8b732 | 4788 | { |
06465c5a AK |
4789 | kvm_emulate_cpuid(vcpu); |
4790 | return 1; | |
6aa8b732 AK |
4791 | } |
4792 | ||
851ba692 | 4793 | static int handle_rdmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4794 | { |
ad312c7c | 4795 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
4796 | u64 data; |
4797 | ||
4798 | if (vmx_get_msr(vcpu, ecx, &data)) { | |
59200273 | 4799 | trace_kvm_msr_read_ex(ecx); |
c1a5d4f9 | 4800 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
4801 | return 1; |
4802 | } | |
4803 | ||
229456fc | 4804 | trace_kvm_msr_read(ecx, data); |
2714d1d3 | 4805 | |
6aa8b732 | 4806 | /* FIXME: handling of bits 32:63 of rax, rdx */ |
ad312c7c ZX |
4807 | vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u; |
4808 | vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u; | |
6aa8b732 AK |
4809 | skip_emulated_instruction(vcpu); |
4810 | return 1; | |
4811 | } | |
4812 | ||
851ba692 | 4813 | static int handle_wrmsr(struct kvm_vcpu *vcpu) |
6aa8b732 | 4814 | { |
8fe8ab46 | 4815 | struct msr_data msr; |
ad312c7c ZX |
4816 | u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX]; |
4817 | u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u) | |
4818 | | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
6aa8b732 | 4819 | |
8fe8ab46 WA |
4820 | msr.data = data; |
4821 | msr.index = ecx; | |
4822 | msr.host_initiated = false; | |
4823 | if (vmx_set_msr(vcpu, &msr) != 0) { | |
59200273 | 4824 | trace_kvm_msr_write_ex(ecx, data); |
c1a5d4f9 | 4825 | kvm_inject_gp(vcpu, 0); |
6aa8b732 AK |
4826 | return 1; |
4827 | } | |
4828 | ||
59200273 | 4829 | trace_kvm_msr_write(ecx, data); |
6aa8b732 AK |
4830 | skip_emulated_instruction(vcpu); |
4831 | return 1; | |
4832 | } | |
4833 | ||
851ba692 | 4834 | static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu) |
6e5d865c | 4835 | { |
3842d135 | 4836 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
6e5d865c YS |
4837 | return 1; |
4838 | } | |
4839 | ||
851ba692 | 4840 | static int handle_interrupt_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 4841 | { |
85f455f7 ED |
4842 | u32 cpu_based_vm_exec_control; |
4843 | ||
4844 | /* clear pending irq */ | |
4845 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
4846 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
4847 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
2714d1d3 | 4848 | |
3842d135 AK |
4849 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
4850 | ||
a26bf12a | 4851 | ++vcpu->stat.irq_window_exits; |
2714d1d3 | 4852 | |
c1150d8c DL |
4853 | /* |
4854 | * If the user space waits to inject interrupts, exit as soon as | |
4855 | * possible | |
4856 | */ | |
8061823a | 4857 | if (!irqchip_in_kernel(vcpu->kvm) && |
851ba692 | 4858 | vcpu->run->request_interrupt_window && |
8061823a | 4859 | !kvm_cpu_has_interrupt(vcpu)) { |
851ba692 | 4860 | vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
c1150d8c DL |
4861 | return 0; |
4862 | } | |
6aa8b732 AK |
4863 | return 1; |
4864 | } | |
4865 | ||
851ba692 | 4866 | static int handle_halt(struct kvm_vcpu *vcpu) |
6aa8b732 AK |
4867 | { |
4868 | skip_emulated_instruction(vcpu); | |
d3bef15f | 4869 | return kvm_emulate_halt(vcpu); |
6aa8b732 AK |
4870 | } |
4871 | ||
851ba692 | 4872 | static int handle_vmcall(struct kvm_vcpu *vcpu) |
c21415e8 | 4873 | { |
510043da | 4874 | skip_emulated_instruction(vcpu); |
7aa81cc0 AL |
4875 | kvm_emulate_hypercall(vcpu); |
4876 | return 1; | |
c21415e8 IM |
4877 | } |
4878 | ||
ec25d5e6 GN |
4879 | static int handle_invd(struct kvm_vcpu *vcpu) |
4880 | { | |
51d8b661 | 4881 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
ec25d5e6 GN |
4882 | } |
4883 | ||
851ba692 | 4884 | static int handle_invlpg(struct kvm_vcpu *vcpu) |
a7052897 | 4885 | { |
f9c617f6 | 4886 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
a7052897 MT |
4887 | |
4888 | kvm_mmu_invlpg(vcpu, exit_qualification); | |
4889 | skip_emulated_instruction(vcpu); | |
4890 | return 1; | |
4891 | } | |
4892 | ||
fee84b07 AK |
4893 | static int handle_rdpmc(struct kvm_vcpu *vcpu) |
4894 | { | |
4895 | int err; | |
4896 | ||
4897 | err = kvm_rdpmc(vcpu); | |
4898 | kvm_complete_insn_gp(vcpu, err); | |
4899 | ||
4900 | return 1; | |
4901 | } | |
4902 | ||
851ba692 | 4903 | static int handle_wbinvd(struct kvm_vcpu *vcpu) |
e5edaa01 ED |
4904 | { |
4905 | skip_emulated_instruction(vcpu); | |
f5f48ee1 | 4906 | kvm_emulate_wbinvd(vcpu); |
e5edaa01 ED |
4907 | return 1; |
4908 | } | |
4909 | ||
2acf923e DC |
4910 | static int handle_xsetbv(struct kvm_vcpu *vcpu) |
4911 | { | |
4912 | u64 new_bv = kvm_read_edx_eax(vcpu); | |
4913 | u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4914 | ||
4915 | if (kvm_set_xcr(vcpu, index, new_bv) == 0) | |
4916 | skip_emulated_instruction(vcpu); | |
4917 | return 1; | |
4918 | } | |
4919 | ||
851ba692 | 4920 | static int handle_apic_access(struct kvm_vcpu *vcpu) |
f78e0e2e | 4921 | { |
58fbbf26 KT |
4922 | if (likely(fasteoi)) { |
4923 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
4924 | int access_type, offset; | |
4925 | ||
4926 | access_type = exit_qualification & APIC_ACCESS_TYPE; | |
4927 | offset = exit_qualification & APIC_ACCESS_OFFSET; | |
4928 | /* | |
4929 | * Sane guest uses MOV to write EOI, with written value | |
4930 | * not cared. So make a short-circuit here by avoiding | |
4931 | * heavy instruction emulation. | |
4932 | */ | |
4933 | if ((access_type == TYPE_LINEAR_APIC_INST_WRITE) && | |
4934 | (offset == APIC_EOI)) { | |
4935 | kvm_lapic_set_eoi(vcpu); | |
4936 | skip_emulated_instruction(vcpu); | |
4937 | return 1; | |
4938 | } | |
4939 | } | |
51d8b661 | 4940 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; |
f78e0e2e SY |
4941 | } |
4942 | ||
c7c9c56c YZ |
4943 | static int handle_apic_eoi_induced(struct kvm_vcpu *vcpu) |
4944 | { | |
4945 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
4946 | int vector = exit_qualification & 0xff; | |
4947 | ||
4948 | /* EOI-induced VM exit is trap-like and thus no need to adjust IP */ | |
4949 | kvm_apic_set_eoi_accelerated(vcpu, vector); | |
4950 | return 1; | |
4951 | } | |
4952 | ||
83d4c286 YZ |
4953 | static int handle_apic_write(struct kvm_vcpu *vcpu) |
4954 | { | |
4955 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
4956 | u32 offset = exit_qualification & 0xfff; | |
4957 | ||
4958 | /* APIC-write VM exit is trap-like and thus no need to adjust IP */ | |
4959 | kvm_apic_write_nodecode(vcpu, offset); | |
4960 | return 1; | |
4961 | } | |
4962 | ||
851ba692 | 4963 | static int handle_task_switch(struct kvm_vcpu *vcpu) |
37817f29 | 4964 | { |
60637aac | 4965 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
37817f29 | 4966 | unsigned long exit_qualification; |
e269fb21 JK |
4967 | bool has_error_code = false; |
4968 | u32 error_code = 0; | |
37817f29 | 4969 | u16 tss_selector; |
7f3d35fd | 4970 | int reason, type, idt_v, idt_index; |
64a7ec06 GN |
4971 | |
4972 | idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK); | |
7f3d35fd | 4973 | idt_index = (vmx->idt_vectoring_info & VECTORING_INFO_VECTOR_MASK); |
64a7ec06 | 4974 | type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK); |
37817f29 IE |
4975 | |
4976 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
4977 | ||
4978 | reason = (u32)exit_qualification >> 30; | |
64a7ec06 GN |
4979 | if (reason == TASK_SWITCH_GATE && idt_v) { |
4980 | switch (type) { | |
4981 | case INTR_TYPE_NMI_INTR: | |
4982 | vcpu->arch.nmi_injected = false; | |
654f06fc | 4983 | vmx_set_nmi_mask(vcpu, true); |
64a7ec06 GN |
4984 | break; |
4985 | case INTR_TYPE_EXT_INTR: | |
66fd3f7f | 4986 | case INTR_TYPE_SOFT_INTR: |
64a7ec06 GN |
4987 | kvm_clear_interrupt_queue(vcpu); |
4988 | break; | |
4989 | case INTR_TYPE_HARD_EXCEPTION: | |
e269fb21 JK |
4990 | if (vmx->idt_vectoring_info & |
4991 | VECTORING_INFO_DELIVER_CODE_MASK) { | |
4992 | has_error_code = true; | |
4993 | error_code = | |
4994 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
4995 | } | |
4996 | /* fall through */ | |
64a7ec06 GN |
4997 | case INTR_TYPE_SOFT_EXCEPTION: |
4998 | kvm_clear_exception_queue(vcpu); | |
4999 | break; | |
5000 | default: | |
5001 | break; | |
5002 | } | |
60637aac | 5003 | } |
37817f29 IE |
5004 | tss_selector = exit_qualification; |
5005 | ||
64a7ec06 GN |
5006 | if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION && |
5007 | type != INTR_TYPE_EXT_INTR && | |
5008 | type != INTR_TYPE_NMI_INTR)) | |
5009 | skip_emulated_instruction(vcpu); | |
5010 | ||
7f3d35fd KW |
5011 | if (kvm_task_switch(vcpu, tss_selector, |
5012 | type == INTR_TYPE_SOFT_INTR ? idt_index : -1, reason, | |
5013 | has_error_code, error_code) == EMULATE_FAIL) { | |
acb54517 GN |
5014 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; |
5015 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5016 | vcpu->run->internal.ndata = 0; | |
42dbaa5a | 5017 | return 0; |
acb54517 | 5018 | } |
42dbaa5a JK |
5019 | |
5020 | /* clear all local breakpoint enable flags */ | |
5021 | vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55); | |
5022 | ||
5023 | /* | |
5024 | * TODO: What about debug traps on tss switch? | |
5025 | * Are we supposed to inject them and update dr6? | |
5026 | */ | |
5027 | ||
5028 | return 1; | |
37817f29 IE |
5029 | } |
5030 | ||
851ba692 | 5031 | static int handle_ept_violation(struct kvm_vcpu *vcpu) |
1439442c | 5032 | { |
f9c617f6 | 5033 | unsigned long exit_qualification; |
1439442c | 5034 | gpa_t gpa; |
4f5982a5 | 5035 | u32 error_code; |
1439442c | 5036 | int gla_validity; |
1439442c | 5037 | |
f9c617f6 | 5038 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
1439442c | 5039 | |
1439442c SY |
5040 | gla_validity = (exit_qualification >> 7) & 0x3; |
5041 | if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) { | |
5042 | printk(KERN_ERR "EPT: Handling EPT violation failed!\n"); | |
5043 | printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n", | |
5044 | (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS), | |
f9c617f6 | 5045 | vmcs_readl(GUEST_LINEAR_ADDRESS)); |
1439442c SY |
5046 | printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n", |
5047 | (long unsigned int)exit_qualification); | |
851ba692 AK |
5048 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
5049 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION; | |
596ae895 | 5050 | return 0; |
1439442c SY |
5051 | } |
5052 | ||
5053 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
229456fc | 5054 | trace_kvm_page_fault(gpa, exit_qualification); |
4f5982a5 XG |
5055 | |
5056 | /* It is a write fault? */ | |
5057 | error_code = exit_qualification & (1U << 1); | |
5058 | /* ept page table is present? */ | |
5059 | error_code |= (exit_qualification >> 3) & 0x1; | |
5060 | ||
5061 | return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0); | |
1439442c SY |
5062 | } |
5063 | ||
68f89400 MT |
5064 | static u64 ept_rsvd_mask(u64 spte, int level) |
5065 | { | |
5066 | int i; | |
5067 | u64 mask = 0; | |
5068 | ||
5069 | for (i = 51; i > boot_cpu_data.x86_phys_bits; i--) | |
5070 | mask |= (1ULL << i); | |
5071 | ||
5072 | if (level > 2) | |
5073 | /* bits 7:3 reserved */ | |
5074 | mask |= 0xf8; | |
5075 | else if (level == 2) { | |
5076 | if (spte & (1ULL << 7)) | |
5077 | /* 2MB ref, bits 20:12 reserved */ | |
5078 | mask |= 0x1ff000; | |
5079 | else | |
5080 | /* bits 6:3 reserved */ | |
5081 | mask |= 0x78; | |
5082 | } | |
5083 | ||
5084 | return mask; | |
5085 | } | |
5086 | ||
5087 | static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte, | |
5088 | int level) | |
5089 | { | |
5090 | printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level); | |
5091 | ||
5092 | /* 010b (write-only) */ | |
5093 | WARN_ON((spte & 0x7) == 0x2); | |
5094 | ||
5095 | /* 110b (write/execute) */ | |
5096 | WARN_ON((spte & 0x7) == 0x6); | |
5097 | ||
5098 | /* 100b (execute-only) and value not supported by logical processor */ | |
5099 | if (!cpu_has_vmx_ept_execute_only()) | |
5100 | WARN_ON((spte & 0x7) == 0x4); | |
5101 | ||
5102 | /* not 000b */ | |
5103 | if ((spte & 0x7)) { | |
5104 | u64 rsvd_bits = spte & ept_rsvd_mask(spte, level); | |
5105 | ||
5106 | if (rsvd_bits != 0) { | |
5107 | printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n", | |
5108 | __func__, rsvd_bits); | |
5109 | WARN_ON(1); | |
5110 | } | |
5111 | ||
5112 | if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) { | |
5113 | u64 ept_mem_type = (spte & 0x38) >> 3; | |
5114 | ||
5115 | if (ept_mem_type == 2 || ept_mem_type == 3 || | |
5116 | ept_mem_type == 7) { | |
5117 | printk(KERN_ERR "%s: ept_mem_type=0x%llx\n", | |
5118 | __func__, ept_mem_type); | |
5119 | WARN_ON(1); | |
5120 | } | |
5121 | } | |
5122 | } | |
5123 | } | |
5124 | ||
851ba692 | 5125 | static int handle_ept_misconfig(struct kvm_vcpu *vcpu) |
68f89400 MT |
5126 | { |
5127 | u64 sptes[4]; | |
ce88decf | 5128 | int nr_sptes, i, ret; |
68f89400 MT |
5129 | gpa_t gpa; |
5130 | ||
5131 | gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); | |
5132 | ||
ce88decf XG |
5133 | ret = handle_mmio_page_fault_common(vcpu, gpa, true); |
5134 | if (likely(ret == 1)) | |
5135 | return x86_emulate_instruction(vcpu, gpa, 0, NULL, 0) == | |
5136 | EMULATE_DONE; | |
5137 | if (unlikely(!ret)) | |
5138 | return 1; | |
5139 | ||
5140 | /* It is the real ept misconfig */ | |
68f89400 MT |
5141 | printk(KERN_ERR "EPT: Misconfiguration.\n"); |
5142 | printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa); | |
5143 | ||
5144 | nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes); | |
5145 | ||
5146 | for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i) | |
5147 | ept_misconfig_inspect_spte(vcpu, sptes[i-1], i); | |
5148 | ||
851ba692 AK |
5149 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
5150 | vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG; | |
68f89400 MT |
5151 | |
5152 | return 0; | |
5153 | } | |
5154 | ||
851ba692 | 5155 | static int handle_nmi_window(struct kvm_vcpu *vcpu) |
f08864b4 SY |
5156 | { |
5157 | u32 cpu_based_vm_exec_control; | |
5158 | ||
5159 | /* clear pending NMI */ | |
5160 | cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5161 | cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
5162 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control); | |
5163 | ++vcpu->stat.nmi_window_exits; | |
3842d135 | 5164 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
f08864b4 SY |
5165 | |
5166 | return 1; | |
5167 | } | |
5168 | ||
80ced186 | 5169 | static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) |
ea953ef0 | 5170 | { |
8b3079a5 AK |
5171 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
5172 | enum emulation_result err = EMULATE_DONE; | |
80ced186 | 5173 | int ret = 1; |
49e9d557 AK |
5174 | u32 cpu_exec_ctrl; |
5175 | bool intr_window_requested; | |
b8405c18 | 5176 | unsigned count = 130; |
49e9d557 AK |
5177 | |
5178 | cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); | |
5179 | intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; | |
ea953ef0 | 5180 | |
b8405c18 | 5181 | while (!guest_state_valid(vcpu) && count-- != 0) { |
bdea48e3 | 5182 | if (intr_window_requested && vmx_interrupt_allowed(vcpu)) |
49e9d557 AK |
5183 | return handle_interrupt_window(&vmx->vcpu); |
5184 | ||
de87dcdd AK |
5185 | if (test_bit(KVM_REQ_EVENT, &vcpu->requests)) |
5186 | return 1; | |
5187 | ||
51d8b661 | 5188 | err = emulate_instruction(vcpu, 0); |
ea953ef0 | 5189 | |
80ced186 MG |
5190 | if (err == EMULATE_DO_MMIO) { |
5191 | ret = 0; | |
5192 | goto out; | |
5193 | } | |
1d5a4d9b | 5194 | |
de5f70e0 AK |
5195 | if (err != EMULATE_DONE) { |
5196 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
5197 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
5198 | vcpu->run->internal.ndata = 0; | |
6d77dbfc | 5199 | return 0; |
de5f70e0 | 5200 | } |
ea953ef0 MG |
5201 | |
5202 | if (signal_pending(current)) | |
80ced186 | 5203 | goto out; |
ea953ef0 MG |
5204 | if (need_resched()) |
5205 | schedule(); | |
5206 | } | |
5207 | ||
14168786 | 5208 | vmx->emulation_required = emulation_required(vcpu); |
80ced186 MG |
5209 | out: |
5210 | return ret; | |
ea953ef0 MG |
5211 | } |
5212 | ||
4b8d54f9 ZE |
5213 | /* |
5214 | * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE | |
5215 | * exiting, so only get here on cpu with PAUSE-Loop-Exiting. | |
5216 | */ | |
9fb41ba8 | 5217 | static int handle_pause(struct kvm_vcpu *vcpu) |
4b8d54f9 ZE |
5218 | { |
5219 | skip_emulated_instruction(vcpu); | |
5220 | kvm_vcpu_on_spin(vcpu); | |
5221 | ||
5222 | return 1; | |
5223 | } | |
5224 | ||
59708670 SY |
5225 | static int handle_invalid_op(struct kvm_vcpu *vcpu) |
5226 | { | |
5227 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5228 | return 1; | |
5229 | } | |
5230 | ||
ff2f6fe9 NHE |
5231 | /* |
5232 | * To run an L2 guest, we need a vmcs02 based on the L1-specified vmcs12. | |
5233 | * We could reuse a single VMCS for all the L2 guests, but we also want the | |
5234 | * option to allocate a separate vmcs02 for each separate loaded vmcs12 - this | |
5235 | * allows keeping them loaded on the processor, and in the future will allow | |
5236 | * optimizations where prepare_vmcs02 doesn't need to set all the fields on | |
5237 | * every entry if they never change. | |
5238 | * So we keep, in vmx->nested.vmcs02_pool, a cache of size VMCS02_POOL_SIZE | |
5239 | * (>=0) with a vmcs02 for each recently loaded vmcs12s, most recent first. | |
5240 | * | |
5241 | * The following functions allocate and free a vmcs02 in this pool. | |
5242 | */ | |
5243 | ||
5244 | /* Get a VMCS from the pool to use as vmcs02 for the current vmcs12. */ | |
5245 | static struct loaded_vmcs *nested_get_current_vmcs02(struct vcpu_vmx *vmx) | |
5246 | { | |
5247 | struct vmcs02_list *item; | |
5248 | list_for_each_entry(item, &vmx->nested.vmcs02_pool, list) | |
5249 | if (item->vmptr == vmx->nested.current_vmptr) { | |
5250 | list_move(&item->list, &vmx->nested.vmcs02_pool); | |
5251 | return &item->vmcs02; | |
5252 | } | |
5253 | ||
5254 | if (vmx->nested.vmcs02_num >= max(VMCS02_POOL_SIZE, 1)) { | |
5255 | /* Recycle the least recently used VMCS. */ | |
5256 | item = list_entry(vmx->nested.vmcs02_pool.prev, | |
5257 | struct vmcs02_list, list); | |
5258 | item->vmptr = vmx->nested.current_vmptr; | |
5259 | list_move(&item->list, &vmx->nested.vmcs02_pool); | |
5260 | return &item->vmcs02; | |
5261 | } | |
5262 | ||
5263 | /* Create a new VMCS */ | |
5264 | item = (struct vmcs02_list *) | |
5265 | kmalloc(sizeof(struct vmcs02_list), GFP_KERNEL); | |
5266 | if (!item) | |
5267 | return NULL; | |
5268 | item->vmcs02.vmcs = alloc_vmcs(); | |
5269 | if (!item->vmcs02.vmcs) { | |
5270 | kfree(item); | |
5271 | return NULL; | |
5272 | } | |
5273 | loaded_vmcs_init(&item->vmcs02); | |
5274 | item->vmptr = vmx->nested.current_vmptr; | |
5275 | list_add(&(item->list), &(vmx->nested.vmcs02_pool)); | |
5276 | vmx->nested.vmcs02_num++; | |
5277 | return &item->vmcs02; | |
5278 | } | |
5279 | ||
5280 | /* Free and remove from pool a vmcs02 saved for a vmcs12 (if there is one) */ | |
5281 | static void nested_free_vmcs02(struct vcpu_vmx *vmx, gpa_t vmptr) | |
5282 | { | |
5283 | struct vmcs02_list *item; | |
5284 | list_for_each_entry(item, &vmx->nested.vmcs02_pool, list) | |
5285 | if (item->vmptr == vmptr) { | |
5286 | free_loaded_vmcs(&item->vmcs02); | |
5287 | list_del(&item->list); | |
5288 | kfree(item); | |
5289 | vmx->nested.vmcs02_num--; | |
5290 | return; | |
5291 | } | |
5292 | } | |
5293 | ||
5294 | /* | |
5295 | * Free all VMCSs saved for this vcpu, except the one pointed by | |
5296 | * vmx->loaded_vmcs. These include the VMCSs in vmcs02_pool (except the one | |
5297 | * currently used, if running L2), and vmcs01 when running L2. | |
5298 | */ | |
5299 | static void nested_free_all_saved_vmcss(struct vcpu_vmx *vmx) | |
5300 | { | |
5301 | struct vmcs02_list *item, *n; | |
5302 | list_for_each_entry_safe(item, n, &vmx->nested.vmcs02_pool, list) { | |
5303 | if (vmx->loaded_vmcs != &item->vmcs02) | |
5304 | free_loaded_vmcs(&item->vmcs02); | |
5305 | list_del(&item->list); | |
5306 | kfree(item); | |
5307 | } | |
5308 | vmx->nested.vmcs02_num = 0; | |
5309 | ||
5310 | if (vmx->loaded_vmcs != &vmx->vmcs01) | |
5311 | free_loaded_vmcs(&vmx->vmcs01); | |
5312 | } | |
5313 | ||
ec378aee NHE |
5314 | /* |
5315 | * Emulate the VMXON instruction. | |
5316 | * Currently, we just remember that VMX is active, and do not save or even | |
5317 | * inspect the argument to VMXON (the so-called "VMXON pointer") because we | |
5318 | * do not currently need to store anything in that guest-allocated memory | |
5319 | * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their | |
5320 | * argument is different from the VMXON pointer (which the spec says they do). | |
5321 | */ | |
5322 | static int handle_vmon(struct kvm_vcpu *vcpu) | |
5323 | { | |
5324 | struct kvm_segment cs; | |
5325 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5326 | ||
5327 | /* The Intel VMX Instruction Reference lists a bunch of bits that | |
5328 | * are prerequisite to running VMXON, most notably cr4.VMXE must be | |
5329 | * set to 1 (see vmx_set_cr4() for when we allow the guest to set this). | |
5330 | * Otherwise, we should fail with #UD. We test these now: | |
5331 | */ | |
5332 | if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE) || | |
5333 | !kvm_read_cr0_bits(vcpu, X86_CR0_PE) || | |
5334 | (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) { | |
5335 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5336 | return 1; | |
5337 | } | |
5338 | ||
5339 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
5340 | if (is_long_mode(vcpu) && !cs.l) { | |
5341 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5342 | return 1; | |
5343 | } | |
5344 | ||
5345 | if (vmx_get_cpl(vcpu)) { | |
5346 | kvm_inject_gp(vcpu, 0); | |
5347 | return 1; | |
5348 | } | |
5349 | ||
ff2f6fe9 NHE |
5350 | INIT_LIST_HEAD(&(vmx->nested.vmcs02_pool)); |
5351 | vmx->nested.vmcs02_num = 0; | |
5352 | ||
ec378aee NHE |
5353 | vmx->nested.vmxon = true; |
5354 | ||
5355 | skip_emulated_instruction(vcpu); | |
5356 | return 1; | |
5357 | } | |
5358 | ||
5359 | /* | |
5360 | * Intel's VMX Instruction Reference specifies a common set of prerequisites | |
5361 | * for running VMX instructions (except VMXON, whose prerequisites are | |
5362 | * slightly different). It also specifies what exception to inject otherwise. | |
5363 | */ | |
5364 | static int nested_vmx_check_permission(struct kvm_vcpu *vcpu) | |
5365 | { | |
5366 | struct kvm_segment cs; | |
5367 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5368 | ||
5369 | if (!vmx->nested.vmxon) { | |
5370 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5371 | return 0; | |
5372 | } | |
5373 | ||
5374 | vmx_get_segment(vcpu, &cs, VCPU_SREG_CS); | |
5375 | if ((vmx_get_rflags(vcpu) & X86_EFLAGS_VM) || | |
5376 | (is_long_mode(vcpu) && !cs.l)) { | |
5377 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5378 | return 0; | |
5379 | } | |
5380 | ||
5381 | if (vmx_get_cpl(vcpu)) { | |
5382 | kvm_inject_gp(vcpu, 0); | |
5383 | return 0; | |
5384 | } | |
5385 | ||
5386 | return 1; | |
5387 | } | |
5388 | ||
5389 | /* | |
5390 | * Free whatever needs to be freed from vmx->nested when L1 goes down, or | |
5391 | * just stops using VMX. | |
5392 | */ | |
5393 | static void free_nested(struct vcpu_vmx *vmx) | |
5394 | { | |
5395 | if (!vmx->nested.vmxon) | |
5396 | return; | |
5397 | vmx->nested.vmxon = false; | |
a9d30f33 NHE |
5398 | if (vmx->nested.current_vmptr != -1ull) { |
5399 | kunmap(vmx->nested.current_vmcs12_page); | |
5400 | nested_release_page(vmx->nested.current_vmcs12_page); | |
5401 | vmx->nested.current_vmptr = -1ull; | |
5402 | vmx->nested.current_vmcs12 = NULL; | |
5403 | } | |
fe3ef05c NHE |
5404 | /* Unpin physical memory we referred to in current vmcs02 */ |
5405 | if (vmx->nested.apic_access_page) { | |
5406 | nested_release_page(vmx->nested.apic_access_page); | |
5407 | vmx->nested.apic_access_page = 0; | |
5408 | } | |
ff2f6fe9 NHE |
5409 | |
5410 | nested_free_all_saved_vmcss(vmx); | |
ec378aee NHE |
5411 | } |
5412 | ||
5413 | /* Emulate the VMXOFF instruction */ | |
5414 | static int handle_vmoff(struct kvm_vcpu *vcpu) | |
5415 | { | |
5416 | if (!nested_vmx_check_permission(vcpu)) | |
5417 | return 1; | |
5418 | free_nested(to_vmx(vcpu)); | |
5419 | skip_emulated_instruction(vcpu); | |
5420 | return 1; | |
5421 | } | |
5422 | ||
064aea77 NHE |
5423 | /* |
5424 | * Decode the memory-address operand of a vmx instruction, as recorded on an | |
5425 | * exit caused by such an instruction (run by a guest hypervisor). | |
5426 | * On success, returns 0. When the operand is invalid, returns 1 and throws | |
5427 | * #UD or #GP. | |
5428 | */ | |
5429 | static int get_vmx_mem_address(struct kvm_vcpu *vcpu, | |
5430 | unsigned long exit_qualification, | |
5431 | u32 vmx_instruction_info, gva_t *ret) | |
5432 | { | |
5433 | /* | |
5434 | * According to Vol. 3B, "Information for VM Exits Due to Instruction | |
5435 | * Execution", on an exit, vmx_instruction_info holds most of the | |
5436 | * addressing components of the operand. Only the displacement part | |
5437 | * is put in exit_qualification (see 3B, "Basic VM-Exit Information"). | |
5438 | * For how an actual address is calculated from all these components, | |
5439 | * refer to Vol. 1, "Operand Addressing". | |
5440 | */ | |
5441 | int scaling = vmx_instruction_info & 3; | |
5442 | int addr_size = (vmx_instruction_info >> 7) & 7; | |
5443 | bool is_reg = vmx_instruction_info & (1u << 10); | |
5444 | int seg_reg = (vmx_instruction_info >> 15) & 7; | |
5445 | int index_reg = (vmx_instruction_info >> 18) & 0xf; | |
5446 | bool index_is_valid = !(vmx_instruction_info & (1u << 22)); | |
5447 | int base_reg = (vmx_instruction_info >> 23) & 0xf; | |
5448 | bool base_is_valid = !(vmx_instruction_info & (1u << 27)); | |
5449 | ||
5450 | if (is_reg) { | |
5451 | kvm_queue_exception(vcpu, UD_VECTOR); | |
5452 | return 1; | |
5453 | } | |
5454 | ||
5455 | /* Addr = segment_base + offset */ | |
5456 | /* offset = base + [index * scale] + displacement */ | |
5457 | *ret = vmx_get_segment_base(vcpu, seg_reg); | |
5458 | if (base_is_valid) | |
5459 | *ret += kvm_register_read(vcpu, base_reg); | |
5460 | if (index_is_valid) | |
5461 | *ret += kvm_register_read(vcpu, index_reg)<<scaling; | |
5462 | *ret += exit_qualification; /* holds the displacement */ | |
5463 | ||
5464 | if (addr_size == 1) /* 32 bit */ | |
5465 | *ret &= 0xffffffff; | |
5466 | ||
5467 | /* | |
5468 | * TODO: throw #GP (and return 1) in various cases that the VM* | |
5469 | * instructions require it - e.g., offset beyond segment limit, | |
5470 | * unusable or unreadable/unwritable segment, non-canonical 64-bit | |
5471 | * address, and so on. Currently these are not checked. | |
5472 | */ | |
5473 | return 0; | |
5474 | } | |
5475 | ||
0140caea NHE |
5476 | /* |
5477 | * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(), | |
5478 | * set the success or error code of an emulated VMX instruction, as specified | |
5479 | * by Vol 2B, VMX Instruction Reference, "Conventions". | |
5480 | */ | |
5481 | static void nested_vmx_succeed(struct kvm_vcpu *vcpu) | |
5482 | { | |
5483 | vmx_set_rflags(vcpu, vmx_get_rflags(vcpu) | |
5484 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
5485 | X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF)); | |
5486 | } | |
5487 | ||
5488 | static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu) | |
5489 | { | |
5490 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
5491 | & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF | | |
5492 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
5493 | | X86_EFLAGS_CF); | |
5494 | } | |
5495 | ||
5496 | static void nested_vmx_failValid(struct kvm_vcpu *vcpu, | |
5497 | u32 vm_instruction_error) | |
5498 | { | |
5499 | if (to_vmx(vcpu)->nested.current_vmptr == -1ull) { | |
5500 | /* | |
5501 | * failValid writes the error number to the current VMCS, which | |
5502 | * can't be done there isn't a current VMCS. | |
5503 | */ | |
5504 | nested_vmx_failInvalid(vcpu); | |
5505 | return; | |
5506 | } | |
5507 | vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu) | |
5508 | & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF | | |
5509 | X86_EFLAGS_SF | X86_EFLAGS_OF)) | |
5510 | | X86_EFLAGS_ZF); | |
5511 | get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error; | |
5512 | } | |
5513 | ||
27d6c865 NHE |
5514 | /* Emulate the VMCLEAR instruction */ |
5515 | static int handle_vmclear(struct kvm_vcpu *vcpu) | |
5516 | { | |
5517 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5518 | gva_t gva; | |
5519 | gpa_t vmptr; | |
5520 | struct vmcs12 *vmcs12; | |
5521 | struct page *page; | |
5522 | struct x86_exception e; | |
5523 | ||
5524 | if (!nested_vmx_check_permission(vcpu)) | |
5525 | return 1; | |
5526 | ||
5527 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
5528 | vmcs_read32(VMX_INSTRUCTION_INFO), &gva)) | |
5529 | return 1; | |
5530 | ||
5531 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr, | |
5532 | sizeof(vmptr), &e)) { | |
5533 | kvm_inject_page_fault(vcpu, &e); | |
5534 | return 1; | |
5535 | } | |
5536 | ||
5537 | if (!IS_ALIGNED(vmptr, PAGE_SIZE)) { | |
5538 | nested_vmx_failValid(vcpu, VMXERR_VMCLEAR_INVALID_ADDRESS); | |
5539 | skip_emulated_instruction(vcpu); | |
5540 | return 1; | |
5541 | } | |
5542 | ||
5543 | if (vmptr == vmx->nested.current_vmptr) { | |
5544 | kunmap(vmx->nested.current_vmcs12_page); | |
5545 | nested_release_page(vmx->nested.current_vmcs12_page); | |
5546 | vmx->nested.current_vmptr = -1ull; | |
5547 | vmx->nested.current_vmcs12 = NULL; | |
5548 | } | |
5549 | ||
5550 | page = nested_get_page(vcpu, vmptr); | |
5551 | if (page == NULL) { | |
5552 | /* | |
5553 | * For accurate processor emulation, VMCLEAR beyond available | |
5554 | * physical memory should do nothing at all. However, it is | |
5555 | * possible that a nested vmx bug, not a guest hypervisor bug, | |
5556 | * resulted in this case, so let's shut down before doing any | |
5557 | * more damage: | |
5558 | */ | |
5559 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu); | |
5560 | return 1; | |
5561 | } | |
5562 | vmcs12 = kmap(page); | |
5563 | vmcs12->launch_state = 0; | |
5564 | kunmap(page); | |
5565 | nested_release_page(page); | |
5566 | ||
5567 | nested_free_vmcs02(vmx, vmptr); | |
5568 | ||
5569 | skip_emulated_instruction(vcpu); | |
5570 | nested_vmx_succeed(vcpu); | |
5571 | return 1; | |
5572 | } | |
5573 | ||
cd232ad0 NHE |
5574 | static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch); |
5575 | ||
5576 | /* Emulate the VMLAUNCH instruction */ | |
5577 | static int handle_vmlaunch(struct kvm_vcpu *vcpu) | |
5578 | { | |
5579 | return nested_vmx_run(vcpu, true); | |
5580 | } | |
5581 | ||
5582 | /* Emulate the VMRESUME instruction */ | |
5583 | static int handle_vmresume(struct kvm_vcpu *vcpu) | |
5584 | { | |
5585 | ||
5586 | return nested_vmx_run(vcpu, false); | |
5587 | } | |
5588 | ||
49f705c5 NHE |
5589 | enum vmcs_field_type { |
5590 | VMCS_FIELD_TYPE_U16 = 0, | |
5591 | VMCS_FIELD_TYPE_U64 = 1, | |
5592 | VMCS_FIELD_TYPE_U32 = 2, | |
5593 | VMCS_FIELD_TYPE_NATURAL_WIDTH = 3 | |
5594 | }; | |
5595 | ||
5596 | static inline int vmcs_field_type(unsigned long field) | |
5597 | { | |
5598 | if (0x1 & field) /* the *_HIGH fields are all 32 bit */ | |
5599 | return VMCS_FIELD_TYPE_U32; | |
5600 | return (field >> 13) & 0x3 ; | |
5601 | } | |
5602 | ||
5603 | static inline int vmcs_field_readonly(unsigned long field) | |
5604 | { | |
5605 | return (((field >> 10) & 0x3) == 1); | |
5606 | } | |
5607 | ||
5608 | /* | |
5609 | * Read a vmcs12 field. Since these can have varying lengths and we return | |
5610 | * one type, we chose the biggest type (u64) and zero-extend the return value | |
5611 | * to that size. Note that the caller, handle_vmread, might need to use only | |
5612 | * some of the bits we return here (e.g., on 32-bit guests, only 32 bits of | |
5613 | * 64-bit fields are to be returned). | |
5614 | */ | |
5615 | static inline bool vmcs12_read_any(struct kvm_vcpu *vcpu, | |
5616 | unsigned long field, u64 *ret) | |
5617 | { | |
5618 | short offset = vmcs_field_to_offset(field); | |
5619 | char *p; | |
5620 | ||
5621 | if (offset < 0) | |
5622 | return 0; | |
5623 | ||
5624 | p = ((char *)(get_vmcs12(vcpu))) + offset; | |
5625 | ||
5626 | switch (vmcs_field_type(field)) { | |
5627 | case VMCS_FIELD_TYPE_NATURAL_WIDTH: | |
5628 | *ret = *((natural_width *)p); | |
5629 | return 1; | |
5630 | case VMCS_FIELD_TYPE_U16: | |
5631 | *ret = *((u16 *)p); | |
5632 | return 1; | |
5633 | case VMCS_FIELD_TYPE_U32: | |
5634 | *ret = *((u32 *)p); | |
5635 | return 1; | |
5636 | case VMCS_FIELD_TYPE_U64: | |
5637 | *ret = *((u64 *)p); | |
5638 | return 1; | |
5639 | default: | |
5640 | return 0; /* can never happen. */ | |
5641 | } | |
5642 | } | |
5643 | ||
5644 | /* | |
5645 | * VMX instructions which assume a current vmcs12 (i.e., that VMPTRLD was | |
5646 | * used before) all generate the same failure when it is missing. | |
5647 | */ | |
5648 | static int nested_vmx_check_vmcs12(struct kvm_vcpu *vcpu) | |
5649 | { | |
5650 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5651 | if (vmx->nested.current_vmptr == -1ull) { | |
5652 | nested_vmx_failInvalid(vcpu); | |
5653 | skip_emulated_instruction(vcpu); | |
5654 | return 0; | |
5655 | } | |
5656 | return 1; | |
5657 | } | |
5658 | ||
5659 | static int handle_vmread(struct kvm_vcpu *vcpu) | |
5660 | { | |
5661 | unsigned long field; | |
5662 | u64 field_value; | |
5663 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5664 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
5665 | gva_t gva = 0; | |
5666 | ||
5667 | if (!nested_vmx_check_permission(vcpu) || | |
5668 | !nested_vmx_check_vmcs12(vcpu)) | |
5669 | return 1; | |
5670 | ||
5671 | /* Decode instruction info and find the field to read */ | |
5672 | field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); | |
5673 | /* Read the field, zero-extended to a u64 field_value */ | |
5674 | if (!vmcs12_read_any(vcpu, field, &field_value)) { | |
5675 | nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); | |
5676 | skip_emulated_instruction(vcpu); | |
5677 | return 1; | |
5678 | } | |
5679 | /* | |
5680 | * Now copy part of this value to register or memory, as requested. | |
5681 | * Note that the number of bits actually copied is 32 or 64 depending | |
5682 | * on the guest's mode (32 or 64 bit), not on the given field's length. | |
5683 | */ | |
5684 | if (vmx_instruction_info & (1u << 10)) { | |
5685 | kvm_register_write(vcpu, (((vmx_instruction_info) >> 3) & 0xf), | |
5686 | field_value); | |
5687 | } else { | |
5688 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
5689 | vmx_instruction_info, &gva)) | |
5690 | return 1; | |
5691 | /* _system ok, as nested_vmx_check_permission verified cpl=0 */ | |
5692 | kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, gva, | |
5693 | &field_value, (is_long_mode(vcpu) ? 8 : 4), NULL); | |
5694 | } | |
5695 | ||
5696 | nested_vmx_succeed(vcpu); | |
5697 | skip_emulated_instruction(vcpu); | |
5698 | return 1; | |
5699 | } | |
5700 | ||
5701 | ||
5702 | static int handle_vmwrite(struct kvm_vcpu *vcpu) | |
5703 | { | |
5704 | unsigned long field; | |
5705 | gva_t gva; | |
5706 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5707 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
5708 | char *p; | |
5709 | short offset; | |
5710 | /* The value to write might be 32 or 64 bits, depending on L1's long | |
5711 | * mode, and eventually we need to write that into a field of several | |
5712 | * possible lengths. The code below first zero-extends the value to 64 | |
5713 | * bit (field_value), and then copies only the approriate number of | |
5714 | * bits into the vmcs12 field. | |
5715 | */ | |
5716 | u64 field_value = 0; | |
5717 | struct x86_exception e; | |
5718 | ||
5719 | if (!nested_vmx_check_permission(vcpu) || | |
5720 | !nested_vmx_check_vmcs12(vcpu)) | |
5721 | return 1; | |
5722 | ||
5723 | if (vmx_instruction_info & (1u << 10)) | |
5724 | field_value = kvm_register_read(vcpu, | |
5725 | (((vmx_instruction_info) >> 3) & 0xf)); | |
5726 | else { | |
5727 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
5728 | vmx_instruction_info, &gva)) | |
5729 | return 1; | |
5730 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, | |
5731 | &field_value, (is_long_mode(vcpu) ? 8 : 4), &e)) { | |
5732 | kvm_inject_page_fault(vcpu, &e); | |
5733 | return 1; | |
5734 | } | |
5735 | } | |
5736 | ||
5737 | ||
5738 | field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf)); | |
5739 | if (vmcs_field_readonly(field)) { | |
5740 | nested_vmx_failValid(vcpu, | |
5741 | VMXERR_VMWRITE_READ_ONLY_VMCS_COMPONENT); | |
5742 | skip_emulated_instruction(vcpu); | |
5743 | return 1; | |
5744 | } | |
5745 | ||
5746 | offset = vmcs_field_to_offset(field); | |
5747 | if (offset < 0) { | |
5748 | nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); | |
5749 | skip_emulated_instruction(vcpu); | |
5750 | return 1; | |
5751 | } | |
5752 | p = ((char *) get_vmcs12(vcpu)) + offset; | |
5753 | ||
5754 | switch (vmcs_field_type(field)) { | |
5755 | case VMCS_FIELD_TYPE_U16: | |
5756 | *(u16 *)p = field_value; | |
5757 | break; | |
5758 | case VMCS_FIELD_TYPE_U32: | |
5759 | *(u32 *)p = field_value; | |
5760 | break; | |
5761 | case VMCS_FIELD_TYPE_U64: | |
5762 | *(u64 *)p = field_value; | |
5763 | break; | |
5764 | case VMCS_FIELD_TYPE_NATURAL_WIDTH: | |
5765 | *(natural_width *)p = field_value; | |
5766 | break; | |
5767 | default: | |
5768 | nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT); | |
5769 | skip_emulated_instruction(vcpu); | |
5770 | return 1; | |
5771 | } | |
5772 | ||
5773 | nested_vmx_succeed(vcpu); | |
5774 | skip_emulated_instruction(vcpu); | |
5775 | return 1; | |
5776 | } | |
5777 | ||
63846663 NHE |
5778 | /* Emulate the VMPTRLD instruction */ |
5779 | static int handle_vmptrld(struct kvm_vcpu *vcpu) | |
5780 | { | |
5781 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
5782 | gva_t gva; | |
5783 | gpa_t vmptr; | |
5784 | struct x86_exception e; | |
5785 | ||
5786 | if (!nested_vmx_check_permission(vcpu)) | |
5787 | return 1; | |
5788 | ||
5789 | if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION), | |
5790 | vmcs_read32(VMX_INSTRUCTION_INFO), &gva)) | |
5791 | return 1; | |
5792 | ||
5793 | if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr, | |
5794 | sizeof(vmptr), &e)) { | |
5795 | kvm_inject_page_fault(vcpu, &e); | |
5796 | return 1; | |
5797 | } | |
5798 | ||
5799 | if (!IS_ALIGNED(vmptr, PAGE_SIZE)) { | |
5800 | nested_vmx_failValid(vcpu, VMXERR_VMPTRLD_INVALID_ADDRESS); | |
5801 | skip_emulated_instruction(vcpu); | |
5802 | return 1; | |
5803 | } | |
5804 | ||
5805 | if (vmx->nested.current_vmptr != vmptr) { | |
5806 | struct vmcs12 *new_vmcs12; | |
5807 | struct page *page; | |
5808 | page = nested_get_page(vcpu, vmptr); | |
5809 | if (page == NULL) { | |
5810 | nested_vmx_failInvalid(vcpu); | |
5811 | skip_emulated_instruction(vcpu); | |
5812 | return 1; | |
5813 | } | |
5814 | new_vmcs12 = kmap(page); | |
5815 | if (new_vmcs12->revision_id != VMCS12_REVISION) { | |
5816 | kunmap(page); | |
5817 | nested_release_page_clean(page); | |
5818 | nested_vmx_failValid(vcpu, | |
5819 | VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID); | |
5820 | skip_emulated_instruction(vcpu); | |
5821 | return 1; | |
5822 | } | |
5823 | if (vmx->nested.current_vmptr != -1ull) { | |
5824 | kunmap(vmx->nested.current_vmcs12_page); | |
5825 | nested_release_page(vmx->nested.current_vmcs12_page); | |
5826 | } | |
5827 | ||
5828 | vmx->nested.current_vmptr = vmptr; | |
5829 | vmx->nested.current_vmcs12 = new_vmcs12; | |
5830 | vmx->nested.current_vmcs12_page = page; | |
5831 | } | |
5832 | ||
5833 | nested_vmx_succeed(vcpu); | |
5834 | skip_emulated_instruction(vcpu); | |
5835 | return 1; | |
5836 | } | |
5837 | ||
6a4d7550 NHE |
5838 | /* Emulate the VMPTRST instruction */ |
5839 | static int handle_vmptrst(struct kvm_vcpu *vcpu) | |
5840 | { | |
5841 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5842 | u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
5843 | gva_t vmcs_gva; | |
5844 | struct x86_exception e; | |
5845 | ||
5846 | if (!nested_vmx_check_permission(vcpu)) | |
5847 | return 1; | |
5848 | ||
5849 | if (get_vmx_mem_address(vcpu, exit_qualification, | |
5850 | vmx_instruction_info, &vmcs_gva)) | |
5851 | return 1; | |
5852 | /* ok to use *_system, as nested_vmx_check_permission verified cpl=0 */ | |
5853 | if (kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, vmcs_gva, | |
5854 | (void *)&to_vmx(vcpu)->nested.current_vmptr, | |
5855 | sizeof(u64), &e)) { | |
5856 | kvm_inject_page_fault(vcpu, &e); | |
5857 | return 1; | |
5858 | } | |
5859 | nested_vmx_succeed(vcpu); | |
5860 | skip_emulated_instruction(vcpu); | |
5861 | return 1; | |
5862 | } | |
5863 | ||
6aa8b732 AK |
5864 | /* |
5865 | * The exit handlers return 1 if the exit was handled fully and guest execution | |
5866 | * may resume. Otherwise they set the kvm_run parameter to indicate what needs | |
5867 | * to be done to userspace and return 0. | |
5868 | */ | |
772e0318 | 5869 | static int (*const kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { |
6aa8b732 AK |
5870 | [EXIT_REASON_EXCEPTION_NMI] = handle_exception, |
5871 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
988ad74f | 5872 | [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault, |
f08864b4 | 5873 | [EXIT_REASON_NMI_WINDOW] = handle_nmi_window, |
6aa8b732 | 5874 | [EXIT_REASON_IO_INSTRUCTION] = handle_io, |
6aa8b732 AK |
5875 | [EXIT_REASON_CR_ACCESS] = handle_cr, |
5876 | [EXIT_REASON_DR_ACCESS] = handle_dr, | |
5877 | [EXIT_REASON_CPUID] = handle_cpuid, | |
5878 | [EXIT_REASON_MSR_READ] = handle_rdmsr, | |
5879 | [EXIT_REASON_MSR_WRITE] = handle_wrmsr, | |
5880 | [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, | |
5881 | [EXIT_REASON_HLT] = handle_halt, | |
ec25d5e6 | 5882 | [EXIT_REASON_INVD] = handle_invd, |
a7052897 | 5883 | [EXIT_REASON_INVLPG] = handle_invlpg, |
fee84b07 | 5884 | [EXIT_REASON_RDPMC] = handle_rdpmc, |
c21415e8 | 5885 | [EXIT_REASON_VMCALL] = handle_vmcall, |
27d6c865 | 5886 | [EXIT_REASON_VMCLEAR] = handle_vmclear, |
cd232ad0 | 5887 | [EXIT_REASON_VMLAUNCH] = handle_vmlaunch, |
63846663 | 5888 | [EXIT_REASON_VMPTRLD] = handle_vmptrld, |
6a4d7550 | 5889 | [EXIT_REASON_VMPTRST] = handle_vmptrst, |
49f705c5 | 5890 | [EXIT_REASON_VMREAD] = handle_vmread, |
cd232ad0 | 5891 | [EXIT_REASON_VMRESUME] = handle_vmresume, |
49f705c5 | 5892 | [EXIT_REASON_VMWRITE] = handle_vmwrite, |
ec378aee NHE |
5893 | [EXIT_REASON_VMOFF] = handle_vmoff, |
5894 | [EXIT_REASON_VMON] = handle_vmon, | |
f78e0e2e SY |
5895 | [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold, |
5896 | [EXIT_REASON_APIC_ACCESS] = handle_apic_access, | |
83d4c286 | 5897 | [EXIT_REASON_APIC_WRITE] = handle_apic_write, |
c7c9c56c | 5898 | [EXIT_REASON_EOI_INDUCED] = handle_apic_eoi_induced, |
e5edaa01 | 5899 | [EXIT_REASON_WBINVD] = handle_wbinvd, |
2acf923e | 5900 | [EXIT_REASON_XSETBV] = handle_xsetbv, |
37817f29 | 5901 | [EXIT_REASON_TASK_SWITCH] = handle_task_switch, |
a0861c02 | 5902 | [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check, |
68f89400 MT |
5903 | [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation, |
5904 | [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig, | |
4b8d54f9 | 5905 | [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause, |
59708670 SY |
5906 | [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op, |
5907 | [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op, | |
6aa8b732 AK |
5908 | }; |
5909 | ||
5910 | static const int kvm_vmx_max_exit_handlers = | |
50a3485c | 5911 | ARRAY_SIZE(kvm_vmx_exit_handlers); |
6aa8b732 | 5912 | |
908a7bdd JK |
5913 | static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu, |
5914 | struct vmcs12 *vmcs12) | |
5915 | { | |
5916 | unsigned long exit_qualification; | |
5917 | gpa_t bitmap, last_bitmap; | |
5918 | unsigned int port; | |
5919 | int size; | |
5920 | u8 b; | |
5921 | ||
5922 | if (nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING)) | |
5923 | return 1; | |
5924 | ||
5925 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) | |
5926 | return 0; | |
5927 | ||
5928 | exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
5929 | ||
5930 | port = exit_qualification >> 16; | |
5931 | size = (exit_qualification & 7) + 1; | |
5932 | ||
5933 | last_bitmap = (gpa_t)-1; | |
5934 | b = -1; | |
5935 | ||
5936 | while (size > 0) { | |
5937 | if (port < 0x8000) | |
5938 | bitmap = vmcs12->io_bitmap_a; | |
5939 | else if (port < 0x10000) | |
5940 | bitmap = vmcs12->io_bitmap_b; | |
5941 | else | |
5942 | return 1; | |
5943 | bitmap += (port & 0x7fff) / 8; | |
5944 | ||
5945 | if (last_bitmap != bitmap) | |
5946 | if (kvm_read_guest(vcpu->kvm, bitmap, &b, 1)) | |
5947 | return 1; | |
5948 | if (b & (1 << (port & 7))) | |
5949 | return 1; | |
5950 | ||
5951 | port++; | |
5952 | size--; | |
5953 | last_bitmap = bitmap; | |
5954 | } | |
5955 | ||
5956 | return 0; | |
5957 | } | |
5958 | ||
644d711a NHE |
5959 | /* |
5960 | * Return 1 if we should exit from L2 to L1 to handle an MSR access access, | |
5961 | * rather than handle it ourselves in L0. I.e., check whether L1 expressed | |
5962 | * disinterest in the current event (read or write a specific MSR) by using an | |
5963 | * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps. | |
5964 | */ | |
5965 | static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu, | |
5966 | struct vmcs12 *vmcs12, u32 exit_reason) | |
5967 | { | |
5968 | u32 msr_index = vcpu->arch.regs[VCPU_REGS_RCX]; | |
5969 | gpa_t bitmap; | |
5970 | ||
cbd29cb6 | 5971 | if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS)) |
644d711a NHE |
5972 | return 1; |
5973 | ||
5974 | /* | |
5975 | * The MSR_BITMAP page is divided into four 1024-byte bitmaps, | |
5976 | * for the four combinations of read/write and low/high MSR numbers. | |
5977 | * First we need to figure out which of the four to use: | |
5978 | */ | |
5979 | bitmap = vmcs12->msr_bitmap; | |
5980 | if (exit_reason == EXIT_REASON_MSR_WRITE) | |
5981 | bitmap += 2048; | |
5982 | if (msr_index >= 0xc0000000) { | |
5983 | msr_index -= 0xc0000000; | |
5984 | bitmap += 1024; | |
5985 | } | |
5986 | ||
5987 | /* Then read the msr_index'th bit from this bitmap: */ | |
5988 | if (msr_index < 1024*8) { | |
5989 | unsigned char b; | |
bd31a7f5 JK |
5990 | if (kvm_read_guest(vcpu->kvm, bitmap + msr_index/8, &b, 1)) |
5991 | return 1; | |
644d711a NHE |
5992 | return 1 & (b >> (msr_index & 7)); |
5993 | } else | |
5994 | return 1; /* let L1 handle the wrong parameter */ | |
5995 | } | |
5996 | ||
5997 | /* | |
5998 | * Return 1 if we should exit from L2 to L1 to handle a CR access exit, | |
5999 | * rather than handle it ourselves in L0. I.e., check if L1 wanted to | |
6000 | * intercept (via guest_host_mask etc.) the current event. | |
6001 | */ | |
6002 | static bool nested_vmx_exit_handled_cr(struct kvm_vcpu *vcpu, | |
6003 | struct vmcs12 *vmcs12) | |
6004 | { | |
6005 | unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); | |
6006 | int cr = exit_qualification & 15; | |
6007 | int reg = (exit_qualification >> 8) & 15; | |
6008 | unsigned long val = kvm_register_read(vcpu, reg); | |
6009 | ||
6010 | switch ((exit_qualification >> 4) & 3) { | |
6011 | case 0: /* mov to cr */ | |
6012 | switch (cr) { | |
6013 | case 0: | |
6014 | if (vmcs12->cr0_guest_host_mask & | |
6015 | (val ^ vmcs12->cr0_read_shadow)) | |
6016 | return 1; | |
6017 | break; | |
6018 | case 3: | |
6019 | if ((vmcs12->cr3_target_count >= 1 && | |
6020 | vmcs12->cr3_target_value0 == val) || | |
6021 | (vmcs12->cr3_target_count >= 2 && | |
6022 | vmcs12->cr3_target_value1 == val) || | |
6023 | (vmcs12->cr3_target_count >= 3 && | |
6024 | vmcs12->cr3_target_value2 == val) || | |
6025 | (vmcs12->cr3_target_count >= 4 && | |
6026 | vmcs12->cr3_target_value3 == val)) | |
6027 | return 0; | |
6028 | if (nested_cpu_has(vmcs12, CPU_BASED_CR3_LOAD_EXITING)) | |
6029 | return 1; | |
6030 | break; | |
6031 | case 4: | |
6032 | if (vmcs12->cr4_guest_host_mask & | |
6033 | (vmcs12->cr4_read_shadow ^ val)) | |
6034 | return 1; | |
6035 | break; | |
6036 | case 8: | |
6037 | if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING)) | |
6038 | return 1; | |
6039 | break; | |
6040 | } | |
6041 | break; | |
6042 | case 2: /* clts */ | |
6043 | if ((vmcs12->cr0_guest_host_mask & X86_CR0_TS) && | |
6044 | (vmcs12->cr0_read_shadow & X86_CR0_TS)) | |
6045 | return 1; | |
6046 | break; | |
6047 | case 1: /* mov from cr */ | |
6048 | switch (cr) { | |
6049 | case 3: | |
6050 | if (vmcs12->cpu_based_vm_exec_control & | |
6051 | CPU_BASED_CR3_STORE_EXITING) | |
6052 | return 1; | |
6053 | break; | |
6054 | case 8: | |
6055 | if (vmcs12->cpu_based_vm_exec_control & | |
6056 | CPU_BASED_CR8_STORE_EXITING) | |
6057 | return 1; | |
6058 | break; | |
6059 | } | |
6060 | break; | |
6061 | case 3: /* lmsw */ | |
6062 | /* | |
6063 | * lmsw can change bits 1..3 of cr0, and only set bit 0 of | |
6064 | * cr0. Other attempted changes are ignored, with no exit. | |
6065 | */ | |
6066 | if (vmcs12->cr0_guest_host_mask & 0xe & | |
6067 | (val ^ vmcs12->cr0_read_shadow)) | |
6068 | return 1; | |
6069 | if ((vmcs12->cr0_guest_host_mask & 0x1) && | |
6070 | !(vmcs12->cr0_read_shadow & 0x1) && | |
6071 | (val & 0x1)) | |
6072 | return 1; | |
6073 | break; | |
6074 | } | |
6075 | return 0; | |
6076 | } | |
6077 | ||
6078 | /* | |
6079 | * Return 1 if we should exit from L2 to L1 to handle an exit, or 0 if we | |
6080 | * should handle it ourselves in L0 (and then continue L2). Only call this | |
6081 | * when in is_guest_mode (L2). | |
6082 | */ | |
6083 | static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu) | |
6084 | { | |
644d711a NHE |
6085 | u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
6086 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6087 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
957c897e | 6088 | u32 exit_reason = vmx->exit_reason; |
644d711a NHE |
6089 | |
6090 | if (vmx->nested.nested_run_pending) | |
6091 | return 0; | |
6092 | ||
6093 | if (unlikely(vmx->fail)) { | |
bd80158a JK |
6094 | pr_info_ratelimited("%s failed vm entry %x\n", __func__, |
6095 | vmcs_read32(VM_INSTRUCTION_ERROR)); | |
644d711a NHE |
6096 | return 1; |
6097 | } | |
6098 | ||
6099 | switch (exit_reason) { | |
6100 | case EXIT_REASON_EXCEPTION_NMI: | |
6101 | if (!is_exception(intr_info)) | |
6102 | return 0; | |
6103 | else if (is_page_fault(intr_info)) | |
6104 | return enable_ept; | |
6105 | return vmcs12->exception_bitmap & | |
6106 | (1u << (intr_info & INTR_INFO_VECTOR_MASK)); | |
6107 | case EXIT_REASON_EXTERNAL_INTERRUPT: | |
6108 | return 0; | |
6109 | case EXIT_REASON_TRIPLE_FAULT: | |
6110 | return 1; | |
6111 | case EXIT_REASON_PENDING_INTERRUPT: | |
6112 | case EXIT_REASON_NMI_WINDOW: | |
6113 | /* | |
6114 | * prepare_vmcs02() set the CPU_BASED_VIRTUAL_INTR_PENDING bit | |
6115 | * (aka Interrupt Window Exiting) only when L1 turned it on, | |
6116 | * so if we got a PENDING_INTERRUPT exit, this must be for L1. | |
6117 | * Same for NMI Window Exiting. | |
6118 | */ | |
6119 | return 1; | |
6120 | case EXIT_REASON_TASK_SWITCH: | |
6121 | return 1; | |
6122 | case EXIT_REASON_CPUID: | |
6123 | return 1; | |
6124 | case EXIT_REASON_HLT: | |
6125 | return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING); | |
6126 | case EXIT_REASON_INVD: | |
6127 | return 1; | |
6128 | case EXIT_REASON_INVLPG: | |
6129 | return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING); | |
6130 | case EXIT_REASON_RDPMC: | |
6131 | return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING); | |
6132 | case EXIT_REASON_RDTSC: | |
6133 | return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING); | |
6134 | case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR: | |
6135 | case EXIT_REASON_VMLAUNCH: case EXIT_REASON_VMPTRLD: | |
6136 | case EXIT_REASON_VMPTRST: case EXIT_REASON_VMREAD: | |
6137 | case EXIT_REASON_VMRESUME: case EXIT_REASON_VMWRITE: | |
6138 | case EXIT_REASON_VMOFF: case EXIT_REASON_VMON: | |
6139 | /* | |
6140 | * VMX instructions trap unconditionally. This allows L1 to | |
6141 | * emulate them for its L2 guest, i.e., allows 3-level nesting! | |
6142 | */ | |
6143 | return 1; | |
6144 | case EXIT_REASON_CR_ACCESS: | |
6145 | return nested_vmx_exit_handled_cr(vcpu, vmcs12); | |
6146 | case EXIT_REASON_DR_ACCESS: | |
6147 | return nested_cpu_has(vmcs12, CPU_BASED_MOV_DR_EXITING); | |
6148 | case EXIT_REASON_IO_INSTRUCTION: | |
908a7bdd | 6149 | return nested_vmx_exit_handled_io(vcpu, vmcs12); |
644d711a NHE |
6150 | case EXIT_REASON_MSR_READ: |
6151 | case EXIT_REASON_MSR_WRITE: | |
6152 | return nested_vmx_exit_handled_msr(vcpu, vmcs12, exit_reason); | |
6153 | case EXIT_REASON_INVALID_STATE: | |
6154 | return 1; | |
6155 | case EXIT_REASON_MWAIT_INSTRUCTION: | |
6156 | return nested_cpu_has(vmcs12, CPU_BASED_MWAIT_EXITING); | |
6157 | case EXIT_REASON_MONITOR_INSTRUCTION: | |
6158 | return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_EXITING); | |
6159 | case EXIT_REASON_PAUSE_INSTRUCTION: | |
6160 | return nested_cpu_has(vmcs12, CPU_BASED_PAUSE_EXITING) || | |
6161 | nested_cpu_has2(vmcs12, | |
6162 | SECONDARY_EXEC_PAUSE_LOOP_EXITING); | |
6163 | case EXIT_REASON_MCE_DURING_VMENTRY: | |
6164 | return 0; | |
6165 | case EXIT_REASON_TPR_BELOW_THRESHOLD: | |
6166 | return 1; | |
6167 | case EXIT_REASON_APIC_ACCESS: | |
6168 | return nested_cpu_has2(vmcs12, | |
6169 | SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES); | |
6170 | case EXIT_REASON_EPT_VIOLATION: | |
6171 | case EXIT_REASON_EPT_MISCONFIG: | |
6172 | return 0; | |
6173 | case EXIT_REASON_WBINVD: | |
6174 | return nested_cpu_has2(vmcs12, SECONDARY_EXEC_WBINVD_EXITING); | |
6175 | case EXIT_REASON_XSETBV: | |
6176 | return 1; | |
6177 | default: | |
6178 | return 1; | |
6179 | } | |
6180 | } | |
6181 | ||
586f9607 AK |
6182 | static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
6183 | { | |
6184 | *info1 = vmcs_readl(EXIT_QUALIFICATION); | |
6185 | *info2 = vmcs_read32(VM_EXIT_INTR_INFO); | |
6186 | } | |
6187 | ||
6aa8b732 AK |
6188 | /* |
6189 | * The guest has exited. See if we can fix it or if we need userspace | |
6190 | * assistance. | |
6191 | */ | |
851ba692 | 6192 | static int vmx_handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 6193 | { |
29bd8a78 | 6194 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
a0861c02 | 6195 | u32 exit_reason = vmx->exit_reason; |
1155f76a | 6196 | u32 vectoring_info = vmx->idt_vectoring_info; |
29bd8a78 | 6197 | |
80ced186 | 6198 | /* If guest state is invalid, start emulating */ |
14168786 | 6199 | if (vmx->emulation_required) |
80ced186 | 6200 | return handle_invalid_guest_state(vcpu); |
1d5a4d9b | 6201 | |
b6f1250e NHE |
6202 | /* |
6203 | * the KVM_REQ_EVENT optimization bit is only on for one entry, and if | |
6204 | * we did not inject a still-pending event to L1 now because of | |
6205 | * nested_run_pending, we need to re-enable this bit. | |
6206 | */ | |
6207 | if (vmx->nested.nested_run_pending) | |
6208 | kvm_make_request(KVM_REQ_EVENT, vcpu); | |
6209 | ||
509c75ea NHE |
6210 | if (!is_guest_mode(vcpu) && (exit_reason == EXIT_REASON_VMLAUNCH || |
6211 | exit_reason == EXIT_REASON_VMRESUME)) | |
644d711a NHE |
6212 | vmx->nested.nested_run_pending = 1; |
6213 | else | |
6214 | vmx->nested.nested_run_pending = 0; | |
6215 | ||
6216 | if (is_guest_mode(vcpu) && nested_vmx_exit_handled(vcpu)) { | |
6217 | nested_vmx_vmexit(vcpu); | |
6218 | return 1; | |
6219 | } | |
6220 | ||
5120702e MG |
6221 | if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) { |
6222 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
6223 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
6224 | = exit_reason; | |
6225 | return 0; | |
6226 | } | |
6227 | ||
29bd8a78 | 6228 | if (unlikely(vmx->fail)) { |
851ba692 AK |
6229 | vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY; |
6230 | vcpu->run->fail_entry.hardware_entry_failure_reason | |
29bd8a78 AK |
6231 | = vmcs_read32(VM_INSTRUCTION_ERROR); |
6232 | return 0; | |
6233 | } | |
6aa8b732 | 6234 | |
b9bf6882 XG |
6235 | /* |
6236 | * Note: | |
6237 | * Do not try to fix EXIT_REASON_EPT_MISCONFIG if it caused by | |
6238 | * delivery event since it indicates guest is accessing MMIO. | |
6239 | * The vm-exit can be triggered again after return to guest that | |
6240 | * will cause infinite loop. | |
6241 | */ | |
d77c26fc | 6242 | if ((vectoring_info & VECTORING_INFO_VALID_MASK) && |
1439442c | 6243 | (exit_reason != EXIT_REASON_EXCEPTION_NMI && |
60637aac | 6244 | exit_reason != EXIT_REASON_EPT_VIOLATION && |
b9bf6882 XG |
6245 | exit_reason != EXIT_REASON_TASK_SWITCH)) { |
6246 | vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
6247 | vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV; | |
6248 | vcpu->run->internal.ndata = 2; | |
6249 | vcpu->run->internal.data[0] = vectoring_info; | |
6250 | vcpu->run->internal.data[1] = exit_reason; | |
6251 | return 0; | |
6252 | } | |
3b86cd99 | 6253 | |
644d711a NHE |
6254 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked && |
6255 | !(is_guest_mode(vcpu) && nested_cpu_has_virtual_nmis( | |
6256 | get_vmcs12(vcpu), vcpu)))) { | |
c4282df9 | 6257 | if (vmx_interrupt_allowed(vcpu)) { |
3b86cd99 | 6258 | vmx->soft_vnmi_blocked = 0; |
3b86cd99 | 6259 | } else if (vmx->vnmi_blocked_time > 1000000000LL && |
4531220b | 6260 | vcpu->arch.nmi_pending) { |
3b86cd99 JK |
6261 | /* |
6262 | * This CPU don't support us in finding the end of an | |
6263 | * NMI-blocked window if the guest runs with IRQs | |
6264 | * disabled. So we pull the trigger after 1 s of | |
6265 | * futile waiting, but inform the user about this. | |
6266 | */ | |
6267 | printk(KERN_WARNING "%s: Breaking out of NMI-blocked " | |
6268 | "state on VCPU %d after 1 s timeout\n", | |
6269 | __func__, vcpu->vcpu_id); | |
6270 | vmx->soft_vnmi_blocked = 0; | |
3b86cd99 | 6271 | } |
3b86cd99 JK |
6272 | } |
6273 | ||
6aa8b732 AK |
6274 | if (exit_reason < kvm_vmx_max_exit_handlers |
6275 | && kvm_vmx_exit_handlers[exit_reason]) | |
851ba692 | 6276 | return kvm_vmx_exit_handlers[exit_reason](vcpu); |
6aa8b732 | 6277 | else { |
851ba692 AK |
6278 | vcpu->run->exit_reason = KVM_EXIT_UNKNOWN; |
6279 | vcpu->run->hw.hardware_exit_reason = exit_reason; | |
6aa8b732 AK |
6280 | } |
6281 | return 0; | |
6282 | } | |
6283 | ||
95ba8273 | 6284 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
6e5d865c | 6285 | { |
95ba8273 | 6286 | if (irr == -1 || tpr < irr) { |
6e5d865c YS |
6287 | vmcs_write32(TPR_THRESHOLD, 0); |
6288 | return; | |
6289 | } | |
6290 | ||
95ba8273 | 6291 | vmcs_write32(TPR_THRESHOLD, irr); |
6e5d865c YS |
6292 | } |
6293 | ||
8d14695f YZ |
6294 | static void vmx_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set) |
6295 | { | |
6296 | u32 sec_exec_control; | |
6297 | ||
6298 | /* | |
6299 | * There is not point to enable virtualize x2apic without enable | |
6300 | * apicv | |
6301 | */ | |
c7c9c56c YZ |
6302 | if (!cpu_has_vmx_virtualize_x2apic_mode() || |
6303 | !vmx_vm_has_apicv(vcpu->kvm)) | |
8d14695f YZ |
6304 | return; |
6305 | ||
6306 | if (!vm_need_tpr_shadow(vcpu->kvm)) | |
6307 | return; | |
6308 | ||
6309 | sec_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
6310 | ||
6311 | if (set) { | |
6312 | sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
6313 | sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
6314 | } else { | |
6315 | sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; | |
6316 | sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
6317 | } | |
6318 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, sec_exec_control); | |
6319 | ||
6320 | vmx_set_msr_bitmap(vcpu); | |
6321 | } | |
6322 | ||
c7c9c56c YZ |
6323 | static void vmx_hwapic_isr_update(struct kvm *kvm, int isr) |
6324 | { | |
6325 | u16 status; | |
6326 | u8 old; | |
6327 | ||
6328 | if (!vmx_vm_has_apicv(kvm)) | |
6329 | return; | |
6330 | ||
6331 | if (isr == -1) | |
6332 | isr = 0; | |
6333 | ||
6334 | status = vmcs_read16(GUEST_INTR_STATUS); | |
6335 | old = status >> 8; | |
6336 | if (isr != old) { | |
6337 | status &= 0xff; | |
6338 | status |= isr << 8; | |
6339 | vmcs_write16(GUEST_INTR_STATUS, status); | |
6340 | } | |
6341 | } | |
6342 | ||
6343 | static void vmx_set_rvi(int vector) | |
6344 | { | |
6345 | u16 status; | |
6346 | u8 old; | |
6347 | ||
6348 | status = vmcs_read16(GUEST_INTR_STATUS); | |
6349 | old = (u8)status & 0xff; | |
6350 | if ((u8)vector != old) { | |
6351 | status &= ~0xff; | |
6352 | status |= (u8)vector; | |
6353 | vmcs_write16(GUEST_INTR_STATUS, status); | |
6354 | } | |
6355 | } | |
6356 | ||
6357 | static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr) | |
6358 | { | |
6359 | if (max_irr == -1) | |
6360 | return; | |
6361 | ||
6362 | vmx_set_rvi(max_irr); | |
6363 | } | |
6364 | ||
6365 | static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) | |
6366 | { | |
6367 | vmcs_write64(EOI_EXIT_BITMAP0, eoi_exit_bitmap[0]); | |
6368 | vmcs_write64(EOI_EXIT_BITMAP1, eoi_exit_bitmap[1]); | |
6369 | vmcs_write64(EOI_EXIT_BITMAP2, eoi_exit_bitmap[2]); | |
6370 | vmcs_write64(EOI_EXIT_BITMAP3, eoi_exit_bitmap[3]); | |
6371 | } | |
6372 | ||
51aa01d1 | 6373 | static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx) |
cf393f75 | 6374 | { |
00eba012 AK |
6375 | u32 exit_intr_info; |
6376 | ||
6377 | if (!(vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY | |
6378 | || vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI)) | |
6379 | return; | |
6380 | ||
c5ca8e57 | 6381 | vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); |
00eba012 | 6382 | exit_intr_info = vmx->exit_intr_info; |
a0861c02 AK |
6383 | |
6384 | /* Handle machine checks before interrupts are enabled */ | |
00eba012 | 6385 | if (is_machine_check(exit_intr_info)) |
a0861c02 AK |
6386 | kvm_machine_check(); |
6387 | ||
20f65983 | 6388 | /* We need to handle NMIs before interrupts are enabled */ |
00eba012 | 6389 | if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR && |
ff9d07a0 ZY |
6390 | (exit_intr_info & INTR_INFO_VALID_MASK)) { |
6391 | kvm_before_handle_nmi(&vmx->vcpu); | |
20f65983 | 6392 | asm("int $2"); |
ff9d07a0 ZY |
6393 | kvm_after_handle_nmi(&vmx->vcpu); |
6394 | } | |
51aa01d1 | 6395 | } |
20f65983 | 6396 | |
51aa01d1 AK |
6397 | static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx) |
6398 | { | |
c5ca8e57 | 6399 | u32 exit_intr_info; |
51aa01d1 AK |
6400 | bool unblock_nmi; |
6401 | u8 vector; | |
6402 | bool idtv_info_valid; | |
6403 | ||
6404 | idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
20f65983 | 6405 | |
cf393f75 | 6406 | if (cpu_has_virtual_nmis()) { |
9d58b931 AK |
6407 | if (vmx->nmi_known_unmasked) |
6408 | return; | |
c5ca8e57 AK |
6409 | /* |
6410 | * Can't use vmx->exit_intr_info since we're not sure what | |
6411 | * the exit reason is. | |
6412 | */ | |
6413 | exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
cf393f75 AK |
6414 | unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0; |
6415 | vector = exit_intr_info & INTR_INFO_VECTOR_MASK; | |
6416 | /* | |
7b4a25cb | 6417 | * SDM 3: 27.7.1.2 (September 2008) |
cf393f75 AK |
6418 | * Re-set bit "block by NMI" before VM entry if vmexit caused by |
6419 | * a guest IRET fault. | |
7b4a25cb GN |
6420 | * SDM 3: 23.2.2 (September 2008) |
6421 | * Bit 12 is undefined in any of the following cases: | |
6422 | * If the VM exit sets the valid bit in the IDT-vectoring | |
6423 | * information field. | |
6424 | * If the VM exit is due to a double fault. | |
cf393f75 | 6425 | */ |
7b4a25cb GN |
6426 | if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi && |
6427 | vector != DF_VECTOR && !idtv_info_valid) | |
cf393f75 AK |
6428 | vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO, |
6429 | GUEST_INTR_STATE_NMI); | |
9d58b931 AK |
6430 | else |
6431 | vmx->nmi_known_unmasked = | |
6432 | !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) | |
6433 | & GUEST_INTR_STATE_NMI); | |
3b86cd99 JK |
6434 | } else if (unlikely(vmx->soft_vnmi_blocked)) |
6435 | vmx->vnmi_blocked_time += | |
6436 | ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time)); | |
51aa01d1 AK |
6437 | } |
6438 | ||
3ab66e8a | 6439 | static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu, |
83422e17 AK |
6440 | u32 idt_vectoring_info, |
6441 | int instr_len_field, | |
6442 | int error_code_field) | |
51aa01d1 | 6443 | { |
51aa01d1 AK |
6444 | u8 vector; |
6445 | int type; | |
6446 | bool idtv_info_valid; | |
6447 | ||
6448 | idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK; | |
668f612f | 6449 | |
3ab66e8a JK |
6450 | vcpu->arch.nmi_injected = false; |
6451 | kvm_clear_exception_queue(vcpu); | |
6452 | kvm_clear_interrupt_queue(vcpu); | |
37b96e98 GN |
6453 | |
6454 | if (!idtv_info_valid) | |
6455 | return; | |
6456 | ||
3ab66e8a | 6457 | kvm_make_request(KVM_REQ_EVENT, vcpu); |
3842d135 | 6458 | |
668f612f AK |
6459 | vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK; |
6460 | type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK; | |
37b96e98 | 6461 | |
64a7ec06 | 6462 | switch (type) { |
37b96e98 | 6463 | case INTR_TYPE_NMI_INTR: |
3ab66e8a | 6464 | vcpu->arch.nmi_injected = true; |
668f612f | 6465 | /* |
7b4a25cb | 6466 | * SDM 3: 27.7.1.2 (September 2008) |
37b96e98 GN |
6467 | * Clear bit "block by NMI" before VM entry if a NMI |
6468 | * delivery faulted. | |
668f612f | 6469 | */ |
3ab66e8a | 6470 | vmx_set_nmi_mask(vcpu, false); |
37b96e98 | 6471 | break; |
37b96e98 | 6472 | case INTR_TYPE_SOFT_EXCEPTION: |
3ab66e8a | 6473 | vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field); |
66fd3f7f GN |
6474 | /* fall through */ |
6475 | case INTR_TYPE_HARD_EXCEPTION: | |
35920a35 | 6476 | if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) { |
83422e17 | 6477 | u32 err = vmcs_read32(error_code_field); |
3ab66e8a | 6478 | kvm_queue_exception_e(vcpu, vector, err); |
35920a35 | 6479 | } else |
3ab66e8a | 6480 | kvm_queue_exception(vcpu, vector); |
37b96e98 | 6481 | break; |
66fd3f7f | 6482 | case INTR_TYPE_SOFT_INTR: |
3ab66e8a | 6483 | vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field); |
66fd3f7f | 6484 | /* fall through */ |
37b96e98 | 6485 | case INTR_TYPE_EXT_INTR: |
3ab66e8a | 6486 | kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR); |
37b96e98 GN |
6487 | break; |
6488 | default: | |
6489 | break; | |
f7d9238f | 6490 | } |
cf393f75 AK |
6491 | } |
6492 | ||
83422e17 AK |
6493 | static void vmx_complete_interrupts(struct vcpu_vmx *vmx) |
6494 | { | |
66c78ae4 NHE |
6495 | if (is_guest_mode(&vmx->vcpu)) |
6496 | return; | |
3ab66e8a | 6497 | __vmx_complete_interrupts(&vmx->vcpu, vmx->idt_vectoring_info, |
83422e17 AK |
6498 | VM_EXIT_INSTRUCTION_LEN, |
6499 | IDT_VECTORING_ERROR_CODE); | |
6500 | } | |
6501 | ||
b463a6f7 AK |
6502 | static void vmx_cancel_injection(struct kvm_vcpu *vcpu) |
6503 | { | |
66c78ae4 NHE |
6504 | if (is_guest_mode(vcpu)) |
6505 | return; | |
3ab66e8a | 6506 | __vmx_complete_interrupts(vcpu, |
b463a6f7 AK |
6507 | vmcs_read32(VM_ENTRY_INTR_INFO_FIELD), |
6508 | VM_ENTRY_INSTRUCTION_LEN, | |
6509 | VM_ENTRY_EXCEPTION_ERROR_CODE); | |
6510 | ||
6511 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); | |
6512 | } | |
6513 | ||
d7cd9796 GN |
6514 | static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx) |
6515 | { | |
6516 | int i, nr_msrs; | |
6517 | struct perf_guest_switch_msr *msrs; | |
6518 | ||
6519 | msrs = perf_guest_get_msrs(&nr_msrs); | |
6520 | ||
6521 | if (!msrs) | |
6522 | return; | |
6523 | ||
6524 | for (i = 0; i < nr_msrs; i++) | |
6525 | if (msrs[i].host == msrs[i].guest) | |
6526 | clear_atomic_switch_msr(vmx, msrs[i].msr); | |
6527 | else | |
6528 | add_atomic_switch_msr(vmx, msrs[i].msr, msrs[i].guest, | |
6529 | msrs[i].host); | |
6530 | } | |
6531 | ||
a3b5ba49 | 6532 | static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 6533 | { |
a2fa3e9f | 6534 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
2a7921b7 | 6535 | unsigned long debugctlmsr; |
104f226b | 6536 | |
66c78ae4 NHE |
6537 | if (is_guest_mode(vcpu) && !vmx->nested.nested_run_pending) { |
6538 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
6539 | if (vmcs12->idt_vectoring_info_field & | |
6540 | VECTORING_INFO_VALID_MASK) { | |
6541 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
6542 | vmcs12->idt_vectoring_info_field); | |
6543 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
6544 | vmcs12->vm_exit_instruction_len); | |
6545 | if (vmcs12->idt_vectoring_info_field & | |
6546 | VECTORING_INFO_DELIVER_CODE_MASK) | |
6547 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, | |
6548 | vmcs12->idt_vectoring_error_code); | |
6549 | } | |
6550 | } | |
6551 | ||
104f226b AK |
6552 | /* Record the guest's net vcpu time for enforced NMI injections. */ |
6553 | if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked)) | |
6554 | vmx->entry_time = ktime_get(); | |
6555 | ||
6556 | /* Don't enter VMX if guest state is invalid, let the exit handler | |
6557 | start emulation until we arrive back to a valid state */ | |
14168786 | 6558 | if (vmx->emulation_required) |
104f226b AK |
6559 | return; |
6560 | ||
6561 | if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
6562 | vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]); | |
6563 | if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty)) | |
6564 | vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]); | |
6565 | ||
6566 | /* When single-stepping over STI and MOV SS, we must clear the | |
6567 | * corresponding interruptibility bits in the guest state. Otherwise | |
6568 | * vmentry fails as it then expects bit 14 (BS) in pending debug | |
6569 | * exceptions being set, but that's not correct for the guest debugging | |
6570 | * case. */ | |
6571 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) | |
6572 | vmx_set_interrupt_shadow(vcpu, 0); | |
6573 | ||
d7cd9796 | 6574 | atomic_switch_perf_msrs(vmx); |
2a7921b7 | 6575 | debugctlmsr = get_debugctlmsr(); |
d7cd9796 | 6576 | |
d462b819 | 6577 | vmx->__launched = vmx->loaded_vmcs->launched; |
104f226b | 6578 | asm( |
6aa8b732 | 6579 | /* Store host registers */ |
b188c81f AK |
6580 | "push %%" _ASM_DX "; push %%" _ASM_BP ";" |
6581 | "push %%" _ASM_CX " \n\t" /* placeholder for guest rcx */ | |
6582 | "push %%" _ASM_CX " \n\t" | |
6583 | "cmp %%" _ASM_SP ", %c[host_rsp](%0) \n\t" | |
313dbd49 | 6584 | "je 1f \n\t" |
b188c81f | 6585 | "mov %%" _ASM_SP ", %c[host_rsp](%0) \n\t" |
4ecac3fd | 6586 | __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t" |
313dbd49 | 6587 | "1: \n\t" |
d3edefc0 | 6588 | /* Reload cr2 if changed */ |
b188c81f AK |
6589 | "mov %c[cr2](%0), %%" _ASM_AX " \n\t" |
6590 | "mov %%cr2, %%" _ASM_DX " \n\t" | |
6591 | "cmp %%" _ASM_AX ", %%" _ASM_DX " \n\t" | |
d3edefc0 | 6592 | "je 2f \n\t" |
b188c81f | 6593 | "mov %%" _ASM_AX", %%cr2 \n\t" |
d3edefc0 | 6594 | "2: \n\t" |
6aa8b732 | 6595 | /* Check if vmlaunch of vmresume is needed */ |
e08aa78a | 6596 | "cmpl $0, %c[launched](%0) \n\t" |
6aa8b732 | 6597 | /* Load guest registers. Don't clobber flags. */ |
b188c81f AK |
6598 | "mov %c[rax](%0), %%" _ASM_AX " \n\t" |
6599 | "mov %c[rbx](%0), %%" _ASM_BX " \n\t" | |
6600 | "mov %c[rdx](%0), %%" _ASM_DX " \n\t" | |
6601 | "mov %c[rsi](%0), %%" _ASM_SI " \n\t" | |
6602 | "mov %c[rdi](%0), %%" _ASM_DI " \n\t" | |
6603 | "mov %c[rbp](%0), %%" _ASM_BP " \n\t" | |
05b3e0c2 | 6604 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
6605 | "mov %c[r8](%0), %%r8 \n\t" |
6606 | "mov %c[r9](%0), %%r9 \n\t" | |
6607 | "mov %c[r10](%0), %%r10 \n\t" | |
6608 | "mov %c[r11](%0), %%r11 \n\t" | |
6609 | "mov %c[r12](%0), %%r12 \n\t" | |
6610 | "mov %c[r13](%0), %%r13 \n\t" | |
6611 | "mov %c[r14](%0), %%r14 \n\t" | |
6612 | "mov %c[r15](%0), %%r15 \n\t" | |
6aa8b732 | 6613 | #endif |
b188c81f | 6614 | "mov %c[rcx](%0), %%" _ASM_CX " \n\t" /* kills %0 (ecx) */ |
c801949d | 6615 | |
6aa8b732 | 6616 | /* Enter guest mode */ |
83287ea4 | 6617 | "jne 1f \n\t" |
4ecac3fd | 6618 | __ex(ASM_VMX_VMLAUNCH) "\n\t" |
83287ea4 AK |
6619 | "jmp 2f \n\t" |
6620 | "1: " __ex(ASM_VMX_VMRESUME) "\n\t" | |
6621 | "2: " | |
6aa8b732 | 6622 | /* Save guest registers, load host registers, keep flags */ |
b188c81f | 6623 | "mov %0, %c[wordsize](%%" _ASM_SP ") \n\t" |
40712fae | 6624 | "pop %0 \n\t" |
b188c81f AK |
6625 | "mov %%" _ASM_AX ", %c[rax](%0) \n\t" |
6626 | "mov %%" _ASM_BX ", %c[rbx](%0) \n\t" | |
6627 | __ASM_SIZE(pop) " %c[rcx](%0) \n\t" | |
6628 | "mov %%" _ASM_DX ", %c[rdx](%0) \n\t" | |
6629 | "mov %%" _ASM_SI ", %c[rsi](%0) \n\t" | |
6630 | "mov %%" _ASM_DI ", %c[rdi](%0) \n\t" | |
6631 | "mov %%" _ASM_BP ", %c[rbp](%0) \n\t" | |
05b3e0c2 | 6632 | #ifdef CONFIG_X86_64 |
e08aa78a AK |
6633 | "mov %%r8, %c[r8](%0) \n\t" |
6634 | "mov %%r9, %c[r9](%0) \n\t" | |
6635 | "mov %%r10, %c[r10](%0) \n\t" | |
6636 | "mov %%r11, %c[r11](%0) \n\t" | |
6637 | "mov %%r12, %c[r12](%0) \n\t" | |
6638 | "mov %%r13, %c[r13](%0) \n\t" | |
6639 | "mov %%r14, %c[r14](%0) \n\t" | |
6640 | "mov %%r15, %c[r15](%0) \n\t" | |
6aa8b732 | 6641 | #endif |
b188c81f AK |
6642 | "mov %%cr2, %%" _ASM_AX " \n\t" |
6643 | "mov %%" _ASM_AX ", %c[cr2](%0) \n\t" | |
c801949d | 6644 | |
b188c81f | 6645 | "pop %%" _ASM_BP "; pop %%" _ASM_DX " \n\t" |
e08aa78a | 6646 | "setbe %c[fail](%0) \n\t" |
83287ea4 AK |
6647 | ".pushsection .rodata \n\t" |
6648 | ".global vmx_return \n\t" | |
6649 | "vmx_return: " _ASM_PTR " 2b \n\t" | |
6650 | ".popsection" | |
e08aa78a | 6651 | : : "c"(vmx), "d"((unsigned long)HOST_RSP), |
d462b819 | 6652 | [launched]"i"(offsetof(struct vcpu_vmx, __launched)), |
e08aa78a | 6653 | [fail]"i"(offsetof(struct vcpu_vmx, fail)), |
313dbd49 | 6654 | [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)), |
ad312c7c ZX |
6655 | [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])), |
6656 | [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])), | |
6657 | [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])), | |
6658 | [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])), | |
6659 | [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])), | |
6660 | [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])), | |
6661 | [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])), | |
05b3e0c2 | 6662 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
6663 | [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])), |
6664 | [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])), | |
6665 | [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])), | |
6666 | [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])), | |
6667 | [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])), | |
6668 | [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])), | |
6669 | [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])), | |
6670 | [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])), | |
6aa8b732 | 6671 | #endif |
40712fae AK |
6672 | [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)), |
6673 | [wordsize]"i"(sizeof(ulong)) | |
c2036300 LV |
6674 | : "cc", "memory" |
6675 | #ifdef CONFIG_X86_64 | |
b188c81f | 6676 | , "rax", "rbx", "rdi", "rsi" |
c2036300 | 6677 | , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
b188c81f AK |
6678 | #else |
6679 | , "eax", "ebx", "edi", "esi" | |
c2036300 LV |
6680 | #endif |
6681 | ); | |
6aa8b732 | 6682 | |
2a7921b7 GN |
6683 | /* MSR_IA32_DEBUGCTLMSR is zeroed on vmexit. Restore it if needed */ |
6684 | if (debugctlmsr) | |
6685 | update_debugctlmsr(debugctlmsr); | |
6686 | ||
aa67f609 AK |
6687 | #ifndef CONFIG_X86_64 |
6688 | /* | |
6689 | * The sysexit path does not restore ds/es, so we must set them to | |
6690 | * a reasonable value ourselves. | |
6691 | * | |
6692 | * We can't defer this to vmx_load_host_state() since that function | |
6693 | * may be executed in interrupt context, which saves and restore segments | |
6694 | * around it, nullifying its effect. | |
6695 | */ | |
6696 | loadsegment(ds, __USER_DS); | |
6697 | loadsegment(es, __USER_DS); | |
6698 | #endif | |
6699 | ||
6de4f3ad | 6700 | vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP) |
6de12732 | 6701 | | (1 << VCPU_EXREG_RFLAGS) |
69c73028 | 6702 | | (1 << VCPU_EXREG_CPL) |
aff48baa | 6703 | | (1 << VCPU_EXREG_PDPTR) |
2fb92db1 | 6704 | | (1 << VCPU_EXREG_SEGMENTS) |
aff48baa | 6705 | | (1 << VCPU_EXREG_CR3)); |
5fdbf976 MT |
6706 | vcpu->arch.regs_dirty = 0; |
6707 | ||
1155f76a AK |
6708 | vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD); |
6709 | ||
66c78ae4 NHE |
6710 | if (is_guest_mode(vcpu)) { |
6711 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
6712 | vmcs12->idt_vectoring_info_field = vmx->idt_vectoring_info; | |
6713 | if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) { | |
6714 | vmcs12->idt_vectoring_error_code = | |
6715 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
6716 | vmcs12->vm_exit_instruction_len = | |
6717 | vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
6718 | } | |
6719 | } | |
6720 | ||
d462b819 | 6721 | vmx->loaded_vmcs->launched = 1; |
1b6269db | 6722 | |
51aa01d1 | 6723 | vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); |
1e2b1dd7 | 6724 | trace_kvm_exit(vmx->exit_reason, vcpu, KVM_ISA_VMX); |
51aa01d1 AK |
6725 | |
6726 | vmx_complete_atomic_exit(vmx); | |
6727 | vmx_recover_nmi_blocking(vmx); | |
cf393f75 | 6728 | vmx_complete_interrupts(vmx); |
6aa8b732 AK |
6729 | } |
6730 | ||
6aa8b732 AK |
6731 | static void vmx_free_vcpu(struct kvm_vcpu *vcpu) |
6732 | { | |
fb3f0f51 RR |
6733 | struct vcpu_vmx *vmx = to_vmx(vcpu); |
6734 | ||
cdbecfc3 | 6735 | free_vpid(vmx); |
ec378aee | 6736 | free_nested(vmx); |
d462b819 | 6737 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 RR |
6738 | kfree(vmx->guest_msrs); |
6739 | kvm_vcpu_uninit(vcpu); | |
a4770347 | 6740 | kmem_cache_free(kvm_vcpu_cache, vmx); |
6aa8b732 AK |
6741 | } |
6742 | ||
fb3f0f51 | 6743 | static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 6744 | { |
fb3f0f51 | 6745 | int err; |
c16f862d | 6746 | struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
15ad7146 | 6747 | int cpu; |
6aa8b732 | 6748 | |
a2fa3e9f | 6749 | if (!vmx) |
fb3f0f51 RR |
6750 | return ERR_PTR(-ENOMEM); |
6751 | ||
2384d2b3 SY |
6752 | allocate_vpid(vmx); |
6753 | ||
fb3f0f51 RR |
6754 | err = kvm_vcpu_init(&vmx->vcpu, kvm, id); |
6755 | if (err) | |
6756 | goto free_vcpu; | |
965b58a5 | 6757 | |
a2fa3e9f | 6758 | vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); |
be6d05cf | 6759 | err = -ENOMEM; |
fb3f0f51 | 6760 | if (!vmx->guest_msrs) { |
fb3f0f51 RR |
6761 | goto uninit_vcpu; |
6762 | } | |
965b58a5 | 6763 | |
d462b819 NHE |
6764 | vmx->loaded_vmcs = &vmx->vmcs01; |
6765 | vmx->loaded_vmcs->vmcs = alloc_vmcs(); | |
6766 | if (!vmx->loaded_vmcs->vmcs) | |
fb3f0f51 | 6767 | goto free_msrs; |
d462b819 NHE |
6768 | if (!vmm_exclusive) |
6769 | kvm_cpu_vmxon(__pa(per_cpu(vmxarea, raw_smp_processor_id()))); | |
6770 | loaded_vmcs_init(vmx->loaded_vmcs); | |
6771 | if (!vmm_exclusive) | |
6772 | kvm_cpu_vmxoff(); | |
a2fa3e9f | 6773 | |
15ad7146 AK |
6774 | cpu = get_cpu(); |
6775 | vmx_vcpu_load(&vmx->vcpu, cpu); | |
e48672fa | 6776 | vmx->vcpu.cpu = cpu; |
8b9cf98c | 6777 | err = vmx_vcpu_setup(vmx); |
fb3f0f51 | 6778 | vmx_vcpu_put(&vmx->vcpu); |
15ad7146 | 6779 | put_cpu(); |
fb3f0f51 RR |
6780 | if (err) |
6781 | goto free_vmcs; | |
5e4a0b3c | 6782 | if (vm_need_virtualize_apic_accesses(kvm)) |
be6d05cf JK |
6783 | err = alloc_apic_access_page(kvm); |
6784 | if (err) | |
5e4a0b3c | 6785 | goto free_vmcs; |
fb3f0f51 | 6786 | |
b927a3ce SY |
6787 | if (enable_ept) { |
6788 | if (!kvm->arch.ept_identity_map_addr) | |
6789 | kvm->arch.ept_identity_map_addr = | |
6790 | VMX_EPT_IDENTITY_PAGETABLE_ADDR; | |
93ea5388 | 6791 | err = -ENOMEM; |
b7ebfb05 SY |
6792 | if (alloc_identity_pagetable(kvm) != 0) |
6793 | goto free_vmcs; | |
93ea5388 GN |
6794 | if (!init_rmode_identity_map(kvm)) |
6795 | goto free_vmcs; | |
b927a3ce | 6796 | } |
b7ebfb05 | 6797 | |
a9d30f33 NHE |
6798 | vmx->nested.current_vmptr = -1ull; |
6799 | vmx->nested.current_vmcs12 = NULL; | |
6800 | ||
fb3f0f51 RR |
6801 | return &vmx->vcpu; |
6802 | ||
6803 | free_vmcs: | |
5f3fbc34 | 6804 | free_loaded_vmcs(vmx->loaded_vmcs); |
fb3f0f51 | 6805 | free_msrs: |
fb3f0f51 RR |
6806 | kfree(vmx->guest_msrs); |
6807 | uninit_vcpu: | |
6808 | kvm_vcpu_uninit(&vmx->vcpu); | |
6809 | free_vcpu: | |
cdbecfc3 | 6810 | free_vpid(vmx); |
a4770347 | 6811 | kmem_cache_free(kvm_vcpu_cache, vmx); |
fb3f0f51 | 6812 | return ERR_PTR(err); |
6aa8b732 AK |
6813 | } |
6814 | ||
002c7f7c YS |
6815 | static void __init vmx_check_processor_compat(void *rtn) |
6816 | { | |
6817 | struct vmcs_config vmcs_conf; | |
6818 | ||
6819 | *(int *)rtn = 0; | |
6820 | if (setup_vmcs_config(&vmcs_conf) < 0) | |
6821 | *(int *)rtn = -EIO; | |
6822 | if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) { | |
6823 | printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n", | |
6824 | smp_processor_id()); | |
6825 | *(int *)rtn = -EIO; | |
6826 | } | |
6827 | } | |
6828 | ||
67253af5 SY |
6829 | static int get_ept_level(void) |
6830 | { | |
6831 | return VMX_EPT_DEFAULT_GAW + 1; | |
6832 | } | |
6833 | ||
4b12f0de | 6834 | static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 | 6835 | { |
4b12f0de SY |
6836 | u64 ret; |
6837 | ||
522c68c4 SY |
6838 | /* For VT-d and EPT combination |
6839 | * 1. MMIO: always map as UC | |
6840 | * 2. EPT with VT-d: | |
6841 | * a. VT-d without snooping control feature: can't guarantee the | |
6842 | * result, try to trust guest. | |
6843 | * b. VT-d with snooping control feature: snooping control feature of | |
6844 | * VT-d engine can guarantee the cache correctness. Just set it | |
6845 | * to WB to keep consistent with host. So the same as item 3. | |
a19a6d11 | 6846 | * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep |
522c68c4 SY |
6847 | * consistent with host MTRR |
6848 | */ | |
4b12f0de SY |
6849 | if (is_mmio) |
6850 | ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT; | |
522c68c4 SY |
6851 | else if (vcpu->kvm->arch.iommu_domain && |
6852 | !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY)) | |
6853 | ret = kvm_get_guest_memory_type(vcpu, gfn) << | |
6854 | VMX_EPT_MT_EPTE_SHIFT; | |
4b12f0de | 6855 | else |
522c68c4 | 6856 | ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT) |
a19a6d11 | 6857 | | VMX_EPT_IPAT_BIT; |
4b12f0de SY |
6858 | |
6859 | return ret; | |
64d4d521 SY |
6860 | } |
6861 | ||
17cc3935 | 6862 | static int vmx_get_lpage_level(void) |
344f414f | 6863 | { |
878403b7 SY |
6864 | if (enable_ept && !cpu_has_vmx_ept_1g_page()) |
6865 | return PT_DIRECTORY_LEVEL; | |
6866 | else | |
6867 | /* For shadow and EPT supported 1GB page */ | |
6868 | return PT_PDPE_LEVEL; | |
344f414f JR |
6869 | } |
6870 | ||
0e851880 SY |
6871 | static void vmx_cpuid_update(struct kvm_vcpu *vcpu) |
6872 | { | |
4e47c7a6 SY |
6873 | struct kvm_cpuid_entry2 *best; |
6874 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6875 | u32 exec_control; | |
6876 | ||
6877 | vmx->rdtscp_enabled = false; | |
6878 | if (vmx_rdtscp_supported()) { | |
6879 | exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
6880 | if (exec_control & SECONDARY_EXEC_RDTSCP) { | |
6881 | best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
6882 | if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) | |
6883 | vmx->rdtscp_enabled = true; | |
6884 | else { | |
6885 | exec_control &= ~SECONDARY_EXEC_RDTSCP; | |
6886 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
6887 | exec_control); | |
6888 | } | |
6889 | } | |
6890 | } | |
ad756a16 | 6891 | |
ad756a16 MJ |
6892 | /* Exposing INVPCID only when PCID is exposed */ |
6893 | best = kvm_find_cpuid_entry(vcpu, 0x7, 0); | |
6894 | if (vmx_invpcid_supported() && | |
4f977045 | 6895 | best && (best->ebx & bit(X86_FEATURE_INVPCID)) && |
ad756a16 | 6896 | guest_cpuid_has_pcid(vcpu)) { |
29282fde | 6897 | exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); |
ad756a16 MJ |
6898 | exec_control |= SECONDARY_EXEC_ENABLE_INVPCID; |
6899 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
6900 | exec_control); | |
6901 | } else { | |
29282fde TI |
6902 | if (cpu_has_secondary_exec_ctrls()) { |
6903 | exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); | |
6904 | exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID; | |
6905 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, | |
6906 | exec_control); | |
6907 | } | |
ad756a16 | 6908 | if (best) |
4f977045 | 6909 | best->ebx &= ~bit(X86_FEATURE_INVPCID); |
ad756a16 | 6910 | } |
0e851880 SY |
6911 | } |
6912 | ||
d4330ef2 JR |
6913 | static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
6914 | { | |
7b8050f5 NHE |
6915 | if (func == 1 && nested) |
6916 | entry->ecx |= bit(X86_FEATURE_VMX); | |
d4330ef2 JR |
6917 | } |
6918 | ||
fe3ef05c NHE |
6919 | /* |
6920 | * prepare_vmcs02 is called when the L1 guest hypervisor runs its nested | |
6921 | * L2 guest. L1 has a vmcs for L2 (vmcs12), and this function "merges" it | |
6922 | * with L0's requirements for its guest (a.k.a. vmsc01), so we can run the L2 | |
6923 | * guest in a way that will both be appropriate to L1's requests, and our | |
6924 | * needs. In addition to modifying the active vmcs (which is vmcs02), this | |
6925 | * function also has additional necessary side-effects, like setting various | |
6926 | * vcpu->arch fields. | |
6927 | */ | |
6928 | static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
6929 | { | |
6930 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
6931 | u32 exec_control; | |
6932 | ||
6933 | vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector); | |
6934 | vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector); | |
6935 | vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector); | |
6936 | vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector); | |
6937 | vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector); | |
6938 | vmcs_write16(GUEST_GS_SELECTOR, vmcs12->guest_gs_selector); | |
6939 | vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector); | |
6940 | vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector); | |
6941 | vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit); | |
6942 | vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit); | |
6943 | vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit); | |
6944 | vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit); | |
6945 | vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit); | |
6946 | vmcs_write32(GUEST_GS_LIMIT, vmcs12->guest_gs_limit); | |
6947 | vmcs_write32(GUEST_LDTR_LIMIT, vmcs12->guest_ldtr_limit); | |
6948 | vmcs_write32(GUEST_TR_LIMIT, vmcs12->guest_tr_limit); | |
6949 | vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit); | |
6950 | vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit); | |
6951 | vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes); | |
6952 | vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes); | |
6953 | vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes); | |
6954 | vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes); | |
6955 | vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes); | |
6956 | vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes); | |
6957 | vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes); | |
6958 | vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes); | |
6959 | vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base); | |
6960 | vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base); | |
6961 | vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base); | |
6962 | vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base); | |
6963 | vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base); | |
6964 | vmcs_writel(GUEST_GS_BASE, vmcs12->guest_gs_base); | |
6965 | vmcs_writel(GUEST_LDTR_BASE, vmcs12->guest_ldtr_base); | |
6966 | vmcs_writel(GUEST_TR_BASE, vmcs12->guest_tr_base); | |
6967 | vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base); | |
6968 | vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base); | |
6969 | ||
6970 | vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl); | |
6971 | vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, | |
6972 | vmcs12->vm_entry_intr_info_field); | |
6973 | vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, | |
6974 | vmcs12->vm_entry_exception_error_code); | |
6975 | vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, | |
6976 | vmcs12->vm_entry_instruction_len); | |
6977 | vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, | |
6978 | vmcs12->guest_interruptibility_info); | |
6979 | vmcs_write32(GUEST_ACTIVITY_STATE, vmcs12->guest_activity_state); | |
6980 | vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs); | |
503cd0c5 | 6981 | kvm_set_dr(vcpu, 7, vmcs12->guest_dr7); |
fe3ef05c NHE |
6982 | vmcs_writel(GUEST_RFLAGS, vmcs12->guest_rflags); |
6983 | vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, | |
6984 | vmcs12->guest_pending_dbg_exceptions); | |
6985 | vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->guest_sysenter_esp); | |
6986 | vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->guest_sysenter_eip); | |
6987 | ||
6988 | vmcs_write64(VMCS_LINK_POINTER, -1ull); | |
6989 | ||
6990 | vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, | |
6991 | (vmcs_config.pin_based_exec_ctrl | | |
6992 | vmcs12->pin_based_vm_exec_control)); | |
6993 | ||
6994 | /* | |
6995 | * Whether page-faults are trapped is determined by a combination of | |
6996 | * 3 settings: PFEC_MASK, PFEC_MATCH and EXCEPTION_BITMAP.PF. | |
6997 | * If enable_ept, L0 doesn't care about page faults and we should | |
6998 | * set all of these to L1's desires. However, if !enable_ept, L0 does | |
6999 | * care about (at least some) page faults, and because it is not easy | |
7000 | * (if at all possible?) to merge L0 and L1's desires, we simply ask | |
7001 | * to exit on each and every L2 page fault. This is done by setting | |
7002 | * MASK=MATCH=0 and (see below) EB.PF=1. | |
7003 | * Note that below we don't need special code to set EB.PF beyond the | |
7004 | * "or"ing of the EB of vmcs01 and vmcs12, because when enable_ept, | |
7005 | * vmcs01's EB.PF is 0 so the "or" will take vmcs12's value, and when | |
7006 | * !enable_ept, EB.PF is 1, so the "or" will always be 1. | |
7007 | * | |
7008 | * A problem with this approach (when !enable_ept) is that L1 may be | |
7009 | * injected with more page faults than it asked for. This could have | |
7010 | * caused problems, but in practice existing hypervisors don't care. | |
7011 | * To fix this, we will need to emulate the PFEC checking (on the L1 | |
7012 | * page tables), using walk_addr(), when injecting PFs to L1. | |
7013 | */ | |
7014 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, | |
7015 | enable_ept ? vmcs12->page_fault_error_code_mask : 0); | |
7016 | vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, | |
7017 | enable_ept ? vmcs12->page_fault_error_code_match : 0); | |
7018 | ||
7019 | if (cpu_has_secondary_exec_ctrls()) { | |
7020 | u32 exec_control = vmx_secondary_exec_control(vmx); | |
7021 | if (!vmx->rdtscp_enabled) | |
7022 | exec_control &= ~SECONDARY_EXEC_RDTSCP; | |
7023 | /* Take the following fields only from vmcs12 */ | |
7024 | exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
7025 | if (nested_cpu_has(vmcs12, | |
7026 | CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)) | |
7027 | exec_control |= vmcs12->secondary_vm_exec_control; | |
7028 | ||
7029 | if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) { | |
7030 | /* | |
7031 | * Translate L1 physical address to host physical | |
7032 | * address for vmcs02. Keep the page pinned, so this | |
7033 | * physical address remains valid. We keep a reference | |
7034 | * to it so we can release it later. | |
7035 | */ | |
7036 | if (vmx->nested.apic_access_page) /* shouldn't happen */ | |
7037 | nested_release_page(vmx->nested.apic_access_page); | |
7038 | vmx->nested.apic_access_page = | |
7039 | nested_get_page(vcpu, vmcs12->apic_access_addr); | |
7040 | /* | |
7041 | * If translation failed, no matter: This feature asks | |
7042 | * to exit when accessing the given address, and if it | |
7043 | * can never be accessed, this feature won't do | |
7044 | * anything anyway. | |
7045 | */ | |
7046 | if (!vmx->nested.apic_access_page) | |
7047 | exec_control &= | |
7048 | ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; | |
7049 | else | |
7050 | vmcs_write64(APIC_ACCESS_ADDR, | |
7051 | page_to_phys(vmx->nested.apic_access_page)); | |
7052 | } | |
7053 | ||
7054 | vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); | |
7055 | } | |
7056 | ||
7057 | ||
7058 | /* | |
7059 | * Set host-state according to L0's settings (vmcs12 is irrelevant here) | |
7060 | * Some constant fields are set here by vmx_set_constant_host_state(). | |
7061 | * Other fields are different per CPU, and will be set later when | |
7062 | * vmx_vcpu_load() is called, and when vmx_save_host_state() is called. | |
7063 | */ | |
7064 | vmx_set_constant_host_state(); | |
7065 | ||
7066 | /* | |
7067 | * HOST_RSP is normally set correctly in vmx_vcpu_run() just before | |
7068 | * entry, but only if the current (host) sp changed from the value | |
7069 | * we wrote last (vmx->host_rsp). This cache is no longer relevant | |
7070 | * if we switch vmcs, and rather than hold a separate cache per vmcs, | |
7071 | * here we just force the write to happen on entry. | |
7072 | */ | |
7073 | vmx->host_rsp = 0; | |
7074 | ||
7075 | exec_control = vmx_exec_control(vmx); /* L0's desires */ | |
7076 | exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING; | |
7077 | exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING; | |
7078 | exec_control &= ~CPU_BASED_TPR_SHADOW; | |
7079 | exec_control |= vmcs12->cpu_based_vm_exec_control; | |
7080 | /* | |
7081 | * Merging of IO and MSR bitmaps not currently supported. | |
7082 | * Rather, exit every time. | |
7083 | */ | |
7084 | exec_control &= ~CPU_BASED_USE_MSR_BITMAPS; | |
7085 | exec_control &= ~CPU_BASED_USE_IO_BITMAPS; | |
7086 | exec_control |= CPU_BASED_UNCOND_IO_EXITING; | |
7087 | ||
7088 | vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control); | |
7089 | ||
7090 | /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the | |
7091 | * bitwise-or of what L1 wants to trap for L2, and what we want to | |
7092 | * trap. Note that CR0.TS also needs updating - we do this later. | |
7093 | */ | |
7094 | update_exception_bitmap(vcpu); | |
7095 | vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask; | |
7096 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
7097 | ||
7098 | /* Note: IA32_MODE, LOAD_IA32_EFER are modified by vmx_set_efer below */ | |
7099 | vmcs_write32(VM_EXIT_CONTROLS, | |
7100 | vmcs12->vm_exit_controls | vmcs_config.vmexit_ctrl); | |
7101 | vmcs_write32(VM_ENTRY_CONTROLS, vmcs12->vm_entry_controls | | |
7102 | (vmcs_config.vmentry_ctrl & ~VM_ENTRY_IA32E_MODE)); | |
7103 | ||
7104 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT) | |
7105 | vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat); | |
7106 | else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) | |
7107 | vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat); | |
7108 | ||
7109 | ||
7110 | set_cr4_guest_host_mask(vmx); | |
7111 | ||
27fc51b2 NHE |
7112 | if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING) |
7113 | vmcs_write64(TSC_OFFSET, | |
7114 | vmx->nested.vmcs01_tsc_offset + vmcs12->tsc_offset); | |
7115 | else | |
7116 | vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset); | |
fe3ef05c NHE |
7117 | |
7118 | if (enable_vpid) { | |
7119 | /* | |
7120 | * Trivially support vpid by letting L2s share their parent | |
7121 | * L1's vpid. TODO: move to a more elaborate solution, giving | |
7122 | * each L2 its own vpid and exposing the vpid feature to L1. | |
7123 | */ | |
7124 | vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid); | |
7125 | vmx_flush_tlb(vcpu); | |
7126 | } | |
7127 | ||
7128 | if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER) | |
7129 | vcpu->arch.efer = vmcs12->guest_ia32_efer; | |
7130 | if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE) | |
7131 | vcpu->arch.efer |= (EFER_LMA | EFER_LME); | |
7132 | else | |
7133 | vcpu->arch.efer &= ~(EFER_LMA | EFER_LME); | |
7134 | /* Note: modifies VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */ | |
7135 | vmx_set_efer(vcpu, vcpu->arch.efer); | |
7136 | ||
7137 | /* | |
7138 | * This sets GUEST_CR0 to vmcs12->guest_cr0, with possibly a modified | |
7139 | * TS bit (for lazy fpu) and bits which we consider mandatory enabled. | |
7140 | * The CR0_READ_SHADOW is what L2 should have expected to read given | |
7141 | * the specifications by L1; It's not enough to take | |
7142 | * vmcs12->cr0_read_shadow because on our cr0_guest_host_mask we we | |
7143 | * have more bits than L1 expected. | |
7144 | */ | |
7145 | vmx_set_cr0(vcpu, vmcs12->guest_cr0); | |
7146 | vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12)); | |
7147 | ||
7148 | vmx_set_cr4(vcpu, vmcs12->guest_cr4); | |
7149 | vmcs_writel(CR4_READ_SHADOW, nested_read_cr4(vmcs12)); | |
7150 | ||
7151 | /* shadow page tables on either EPT or shadow page tables */ | |
7152 | kvm_set_cr3(vcpu, vmcs12->guest_cr3); | |
7153 | kvm_mmu_reset_context(vcpu); | |
7154 | ||
7155 | kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp); | |
7156 | kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->guest_rip); | |
7157 | } | |
7158 | ||
cd232ad0 NHE |
7159 | /* |
7160 | * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1 | |
7161 | * for running an L2 nested guest. | |
7162 | */ | |
7163 | static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) | |
7164 | { | |
7165 | struct vmcs12 *vmcs12; | |
7166 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
7167 | int cpu; | |
7168 | struct loaded_vmcs *vmcs02; | |
7169 | ||
7170 | if (!nested_vmx_check_permission(vcpu) || | |
7171 | !nested_vmx_check_vmcs12(vcpu)) | |
7172 | return 1; | |
7173 | ||
7174 | skip_emulated_instruction(vcpu); | |
7175 | vmcs12 = get_vmcs12(vcpu); | |
7176 | ||
7c177938 NHE |
7177 | /* |
7178 | * The nested entry process starts with enforcing various prerequisites | |
7179 | * on vmcs12 as required by the Intel SDM, and act appropriately when | |
7180 | * they fail: As the SDM explains, some conditions should cause the | |
7181 | * instruction to fail, while others will cause the instruction to seem | |
7182 | * to succeed, but return an EXIT_REASON_INVALID_STATE. | |
7183 | * To speed up the normal (success) code path, we should avoid checking | |
7184 | * for misconfigurations which will anyway be caught by the processor | |
7185 | * when using the merged vmcs02. | |
7186 | */ | |
7187 | if (vmcs12->launch_state == launch) { | |
7188 | nested_vmx_failValid(vcpu, | |
7189 | launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS | |
7190 | : VMXERR_VMRESUME_NONLAUNCHED_VMCS); | |
7191 | return 1; | |
7192 | } | |
7193 | ||
7194 | if ((vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_MSR_BITMAPS) && | |
7195 | !IS_ALIGNED(vmcs12->msr_bitmap, PAGE_SIZE)) { | |
7196 | /*TODO: Also verify bits beyond physical address width are 0*/ | |
7197 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
7198 | return 1; | |
7199 | } | |
7200 | ||
7201 | if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) && | |
7202 | !IS_ALIGNED(vmcs12->apic_access_addr, PAGE_SIZE)) { | |
7203 | /*TODO: Also verify bits beyond physical address width are 0*/ | |
7204 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
7205 | return 1; | |
7206 | } | |
7207 | ||
7208 | if (vmcs12->vm_entry_msr_load_count > 0 || | |
7209 | vmcs12->vm_exit_msr_load_count > 0 || | |
7210 | vmcs12->vm_exit_msr_store_count > 0) { | |
bd80158a JK |
7211 | pr_warn_ratelimited("%s: VMCS MSR_{LOAD,STORE} unsupported\n", |
7212 | __func__); | |
7c177938 NHE |
7213 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); |
7214 | return 1; | |
7215 | } | |
7216 | ||
7217 | if (!vmx_control_verify(vmcs12->cpu_based_vm_exec_control, | |
7218 | nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high) || | |
7219 | !vmx_control_verify(vmcs12->secondary_vm_exec_control, | |
7220 | nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high) || | |
7221 | !vmx_control_verify(vmcs12->pin_based_vm_exec_control, | |
7222 | nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high) || | |
7223 | !vmx_control_verify(vmcs12->vm_exit_controls, | |
7224 | nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high) || | |
7225 | !vmx_control_verify(vmcs12->vm_entry_controls, | |
7226 | nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high)) | |
7227 | { | |
7228 | nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD); | |
7229 | return 1; | |
7230 | } | |
7231 | ||
7232 | if (((vmcs12->host_cr0 & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON) || | |
7233 | ((vmcs12->host_cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) { | |
7234 | nested_vmx_failValid(vcpu, | |
7235 | VMXERR_ENTRY_INVALID_HOST_STATE_FIELD); | |
7236 | return 1; | |
7237 | } | |
7238 | ||
7239 | if (((vmcs12->guest_cr0 & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON) || | |
7240 | ((vmcs12->guest_cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) { | |
7241 | nested_vmx_entry_failure(vcpu, vmcs12, | |
7242 | EXIT_REASON_INVALID_STATE, ENTRY_FAIL_DEFAULT); | |
7243 | return 1; | |
7244 | } | |
7245 | if (vmcs12->vmcs_link_pointer != -1ull) { | |
7246 | nested_vmx_entry_failure(vcpu, vmcs12, | |
7247 | EXIT_REASON_INVALID_STATE, ENTRY_FAIL_VMCS_LINK_PTR); | |
7248 | return 1; | |
7249 | } | |
7250 | ||
7251 | /* | |
7252 | * We're finally done with prerequisite checking, and can start with | |
7253 | * the nested entry. | |
7254 | */ | |
7255 | ||
cd232ad0 NHE |
7256 | vmcs02 = nested_get_current_vmcs02(vmx); |
7257 | if (!vmcs02) | |
7258 | return -ENOMEM; | |
7259 | ||
7260 | enter_guest_mode(vcpu); | |
7261 | ||
7262 | vmx->nested.vmcs01_tsc_offset = vmcs_read64(TSC_OFFSET); | |
7263 | ||
7264 | cpu = get_cpu(); | |
7265 | vmx->loaded_vmcs = vmcs02; | |
7266 | vmx_vcpu_put(vcpu); | |
7267 | vmx_vcpu_load(vcpu, cpu); | |
7268 | vcpu->cpu = cpu; | |
7269 | put_cpu(); | |
7270 | ||
36c3cc42 JK |
7271 | vmx_segment_cache_clear(vmx); |
7272 | ||
cd232ad0 NHE |
7273 | vmcs12->launch_state = 1; |
7274 | ||
7275 | prepare_vmcs02(vcpu, vmcs12); | |
7276 | ||
7277 | /* | |
7278 | * Note no nested_vmx_succeed or nested_vmx_fail here. At this point | |
7279 | * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet | |
7280 | * returned as far as L1 is concerned. It will only return (and set | |
7281 | * the success flag) when L2 exits (see nested_vmx_vmexit()). | |
7282 | */ | |
7283 | return 1; | |
7284 | } | |
7285 | ||
4704d0be NHE |
7286 | /* |
7287 | * On a nested exit from L2 to L1, vmcs12.guest_cr0 might not be up-to-date | |
7288 | * because L2 may have changed some cr0 bits directly (CRO_GUEST_HOST_MASK). | |
7289 | * This function returns the new value we should put in vmcs12.guest_cr0. | |
7290 | * It's not enough to just return the vmcs02 GUEST_CR0. Rather, | |
7291 | * 1. Bits that neither L0 nor L1 trapped, were set directly by L2 and are now | |
7292 | * available in vmcs02 GUEST_CR0. (Note: It's enough to check that L0 | |
7293 | * didn't trap the bit, because if L1 did, so would L0). | |
7294 | * 2. Bits that L1 asked to trap (and therefore L0 also did) could not have | |
7295 | * been modified by L2, and L1 knows it. So just leave the old value of | |
7296 | * the bit from vmcs12.guest_cr0. Note that the bit from vmcs02 GUEST_CR0 | |
7297 | * isn't relevant, because if L0 traps this bit it can set it to anything. | |
7298 | * 3. Bits that L1 didn't trap, but L0 did. L1 believes the guest could have | |
7299 | * changed these bits, and therefore they need to be updated, but L0 | |
7300 | * didn't necessarily allow them to be changed in GUEST_CR0 - and rather | |
7301 | * put them in vmcs02 CR0_READ_SHADOW. So take these bits from there. | |
7302 | */ | |
7303 | static inline unsigned long | |
7304 | vmcs12_guest_cr0(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
7305 | { | |
7306 | return | |
7307 | /*1*/ (vmcs_readl(GUEST_CR0) & vcpu->arch.cr0_guest_owned_bits) | | |
7308 | /*2*/ (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask) | | |
7309 | /*3*/ (vmcs_readl(CR0_READ_SHADOW) & ~(vmcs12->cr0_guest_host_mask | | |
7310 | vcpu->arch.cr0_guest_owned_bits)); | |
7311 | } | |
7312 | ||
7313 | static inline unsigned long | |
7314 | vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) | |
7315 | { | |
7316 | return | |
7317 | /*1*/ (vmcs_readl(GUEST_CR4) & vcpu->arch.cr4_guest_owned_bits) | | |
7318 | /*2*/ (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask) | | |
7319 | /*3*/ (vmcs_readl(CR4_READ_SHADOW) & ~(vmcs12->cr4_guest_host_mask | | |
7320 | vcpu->arch.cr4_guest_owned_bits)); | |
7321 | } | |
7322 | ||
7323 | /* | |
7324 | * prepare_vmcs12 is part of what we need to do when the nested L2 guest exits | |
7325 | * and we want to prepare to run its L1 parent. L1 keeps a vmcs for L2 (vmcs12), | |
7326 | * and this function updates it to reflect the changes to the guest state while | |
7327 | * L2 was running (and perhaps made some exits which were handled directly by L0 | |
7328 | * without going back to L1), and to reflect the exit reason. | |
7329 | * Note that we do not have to copy here all VMCS fields, just those that | |
7330 | * could have changed by the L2 guest or the exit - i.e., the guest-state and | |
7331 | * exit-information fields only. Other fields are modified by L1 with VMWRITE, | |
7332 | * which already writes to vmcs12 directly. | |
7333 | */ | |
733568f9 | 7334 | static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) |
4704d0be NHE |
7335 | { |
7336 | /* update guest state fields: */ | |
7337 | vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12); | |
7338 | vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12); | |
7339 | ||
7340 | kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7); | |
7341 | vmcs12->guest_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
7342 | vmcs12->guest_rip = kvm_register_read(vcpu, VCPU_REGS_RIP); | |
7343 | vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS); | |
7344 | ||
7345 | vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR); | |
7346 | vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR); | |
7347 | vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR); | |
7348 | vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR); | |
7349 | vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR); | |
7350 | vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR); | |
7351 | vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR); | |
7352 | vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR); | |
7353 | vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT); | |
7354 | vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT); | |
7355 | vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT); | |
7356 | vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT); | |
7357 | vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT); | |
7358 | vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT); | |
7359 | vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT); | |
7360 | vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT); | |
7361 | vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT); | |
7362 | vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT); | |
7363 | vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES); | |
7364 | vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES); | |
7365 | vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES); | |
7366 | vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES); | |
7367 | vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES); | |
7368 | vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES); | |
7369 | vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES); | |
7370 | vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES); | |
7371 | vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE); | |
7372 | vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE); | |
7373 | vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE); | |
7374 | vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE); | |
7375 | vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE); | |
7376 | vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE); | |
7377 | vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE); | |
7378 | vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE); | |
7379 | vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE); | |
7380 | vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE); | |
7381 | ||
7382 | vmcs12->guest_activity_state = vmcs_read32(GUEST_ACTIVITY_STATE); | |
7383 | vmcs12->guest_interruptibility_info = | |
7384 | vmcs_read32(GUEST_INTERRUPTIBILITY_INFO); | |
7385 | vmcs12->guest_pending_dbg_exceptions = | |
7386 | vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS); | |
7387 | ||
7388 | /* TODO: These cannot have changed unless we have MSR bitmaps and | |
7389 | * the relevant bit asks not to trap the change */ | |
7390 | vmcs12->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL); | |
7391 | if (vmcs12->vm_entry_controls & VM_EXIT_SAVE_IA32_PAT) | |
7392 | vmcs12->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT); | |
7393 | vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS); | |
7394 | vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP); | |
7395 | vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP); | |
7396 | ||
7397 | /* update exit information fields: */ | |
7398 | ||
957c897e | 7399 | vmcs12->vm_exit_reason = to_vmx(vcpu)->exit_reason; |
4704d0be NHE |
7400 | vmcs12->exit_qualification = vmcs_readl(EXIT_QUALIFICATION); |
7401 | ||
7402 | vmcs12->vm_exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO); | |
7403 | vmcs12->vm_exit_intr_error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE); | |
44ceb9d6 | 7404 | vmcs12->idt_vectoring_info_field = to_vmx(vcpu)->idt_vectoring_info; |
4704d0be NHE |
7405 | vmcs12->idt_vectoring_error_code = |
7406 | vmcs_read32(IDT_VECTORING_ERROR_CODE); | |
7407 | vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN); | |
7408 | vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); | |
7409 | ||
7410 | /* clear vm-entry fields which are to be cleared on exit */ | |
7411 | if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY)) | |
7412 | vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK; | |
7413 | } | |
7414 | ||
7415 | /* | |
7416 | * A part of what we need to when the nested L2 guest exits and we want to | |
7417 | * run its L1 parent, is to reset L1's guest state to the host state specified | |
7418 | * in vmcs12. | |
7419 | * This function is to be called not only on normal nested exit, but also on | |
7420 | * a nested entry failure, as explained in Intel's spec, 3B.23.7 ("VM-Entry | |
7421 | * Failures During or After Loading Guest State"). | |
7422 | * This function should be called when the active VMCS is L1's (vmcs01). | |
7423 | */ | |
733568f9 JK |
7424 | static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, |
7425 | struct vmcs12 *vmcs12) | |
4704d0be NHE |
7426 | { |
7427 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) | |
7428 | vcpu->arch.efer = vmcs12->host_ia32_efer; | |
7429 | if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE) | |
7430 | vcpu->arch.efer |= (EFER_LMA | EFER_LME); | |
7431 | else | |
7432 | vcpu->arch.efer &= ~(EFER_LMA | EFER_LME); | |
7433 | vmx_set_efer(vcpu, vcpu->arch.efer); | |
7434 | ||
7435 | kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp); | |
7436 | kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip); | |
7437 | /* | |
7438 | * Note that calling vmx_set_cr0 is important, even if cr0 hasn't | |
7439 | * actually changed, because it depends on the current state of | |
7440 | * fpu_active (which may have changed). | |
7441 | * Note that vmx_set_cr0 refers to efer set above. | |
7442 | */ | |
7443 | kvm_set_cr0(vcpu, vmcs12->host_cr0); | |
7444 | /* | |
7445 | * If we did fpu_activate()/fpu_deactivate() during L2's run, we need | |
7446 | * to apply the same changes to L1's vmcs. We just set cr0 correctly, | |
7447 | * but we also need to update cr0_guest_host_mask and exception_bitmap. | |
7448 | */ | |
7449 | update_exception_bitmap(vcpu); | |
7450 | vcpu->arch.cr0_guest_owned_bits = (vcpu->fpu_active ? X86_CR0_TS : 0); | |
7451 | vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits); | |
7452 | ||
7453 | /* | |
7454 | * Note that CR4_GUEST_HOST_MASK is already set in the original vmcs01 | |
7455 | * (KVM doesn't change it)- no reason to call set_cr4_guest_host_mask(); | |
7456 | */ | |
7457 | vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK); | |
7458 | kvm_set_cr4(vcpu, vmcs12->host_cr4); | |
7459 | ||
7460 | /* shadow page tables on either EPT or shadow page tables */ | |
7461 | kvm_set_cr3(vcpu, vmcs12->host_cr3); | |
7462 | kvm_mmu_reset_context(vcpu); | |
7463 | ||
7464 | if (enable_vpid) { | |
7465 | /* | |
7466 | * Trivially support vpid by letting L2s share their parent | |
7467 | * L1's vpid. TODO: move to a more elaborate solution, giving | |
7468 | * each L2 its own vpid and exposing the vpid feature to L1. | |
7469 | */ | |
7470 | vmx_flush_tlb(vcpu); | |
7471 | } | |
7472 | ||
7473 | ||
7474 | vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs); | |
7475 | vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp); | |
7476 | vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip); | |
7477 | vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base); | |
7478 | vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base); | |
7479 | vmcs_writel(GUEST_TR_BASE, vmcs12->host_tr_base); | |
7480 | vmcs_writel(GUEST_GS_BASE, vmcs12->host_gs_base); | |
7481 | vmcs_writel(GUEST_FS_BASE, vmcs12->host_fs_base); | |
7482 | vmcs_write16(GUEST_ES_SELECTOR, vmcs12->host_es_selector); | |
7483 | vmcs_write16(GUEST_CS_SELECTOR, vmcs12->host_cs_selector); | |
7484 | vmcs_write16(GUEST_SS_SELECTOR, vmcs12->host_ss_selector); | |
7485 | vmcs_write16(GUEST_DS_SELECTOR, vmcs12->host_ds_selector); | |
7486 | vmcs_write16(GUEST_FS_SELECTOR, vmcs12->host_fs_selector); | |
7487 | vmcs_write16(GUEST_GS_SELECTOR, vmcs12->host_gs_selector); | |
7488 | vmcs_write16(GUEST_TR_SELECTOR, vmcs12->host_tr_selector); | |
7489 | ||
7490 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT) | |
7491 | vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat); | |
7492 | if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) | |
7493 | vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL, | |
7494 | vmcs12->host_ia32_perf_global_ctrl); | |
503cd0c5 JK |
7495 | |
7496 | kvm_set_dr(vcpu, 7, 0x400); | |
7497 | vmcs_write64(GUEST_IA32_DEBUGCTL, 0); | |
4704d0be NHE |
7498 | } |
7499 | ||
7500 | /* | |
7501 | * Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1 | |
7502 | * and modify vmcs12 to make it see what it would expect to see there if | |
7503 | * L2 was its real guest. Must only be called when in L2 (is_guest_mode()) | |
7504 | */ | |
7505 | static void nested_vmx_vmexit(struct kvm_vcpu *vcpu) | |
7506 | { | |
7507 | struct vcpu_vmx *vmx = to_vmx(vcpu); | |
7508 | int cpu; | |
7509 | struct vmcs12 *vmcs12 = get_vmcs12(vcpu); | |
7510 | ||
7511 | leave_guest_mode(vcpu); | |
7512 | prepare_vmcs12(vcpu, vmcs12); | |
7513 | ||
7514 | cpu = get_cpu(); | |
7515 | vmx->loaded_vmcs = &vmx->vmcs01; | |
7516 | vmx_vcpu_put(vcpu); | |
7517 | vmx_vcpu_load(vcpu, cpu); | |
7518 | vcpu->cpu = cpu; | |
7519 | put_cpu(); | |
7520 | ||
36c3cc42 JK |
7521 | vmx_segment_cache_clear(vmx); |
7522 | ||
4704d0be NHE |
7523 | /* if no vmcs02 cache requested, remove the one we used */ |
7524 | if (VMCS02_POOL_SIZE == 0) | |
7525 | nested_free_vmcs02(vmx, vmx->nested.current_vmptr); | |
7526 | ||
7527 | load_vmcs12_host_state(vcpu, vmcs12); | |
7528 | ||
27fc51b2 | 7529 | /* Update TSC_OFFSET if TSC was changed while L2 ran */ |
4704d0be NHE |
7530 | vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset); |
7531 | ||
7532 | /* This is needed for same reason as it was needed in prepare_vmcs02 */ | |
7533 | vmx->host_rsp = 0; | |
7534 | ||
7535 | /* Unpin physical memory we referred to in vmcs02 */ | |
7536 | if (vmx->nested.apic_access_page) { | |
7537 | nested_release_page(vmx->nested.apic_access_page); | |
7538 | vmx->nested.apic_access_page = 0; | |
7539 | } | |
7540 | ||
7541 | /* | |
7542 | * Exiting from L2 to L1, we're now back to L1 which thinks it just | |
7543 | * finished a VMLAUNCH or VMRESUME instruction, so we need to set the | |
7544 | * success or failure flag accordingly. | |
7545 | */ | |
7546 | if (unlikely(vmx->fail)) { | |
7547 | vmx->fail = 0; | |
7548 | nested_vmx_failValid(vcpu, vmcs_read32(VM_INSTRUCTION_ERROR)); | |
7549 | } else | |
7550 | nested_vmx_succeed(vcpu); | |
7551 | } | |
7552 | ||
7c177938 NHE |
7553 | /* |
7554 | * L1's failure to enter L2 is a subset of a normal exit, as explained in | |
7555 | * 23.7 "VM-entry failures during or after loading guest state" (this also | |
7556 | * lists the acceptable exit-reason and exit-qualification parameters). | |
7557 | * It should only be called before L2 actually succeeded to run, and when | |
7558 | * vmcs01 is current (it doesn't leave_guest_mode() or switch vmcss). | |
7559 | */ | |
7560 | static void nested_vmx_entry_failure(struct kvm_vcpu *vcpu, | |
7561 | struct vmcs12 *vmcs12, | |
7562 | u32 reason, unsigned long qualification) | |
7563 | { | |
7564 | load_vmcs12_host_state(vcpu, vmcs12); | |
7565 | vmcs12->vm_exit_reason = reason | VMX_EXIT_REASONS_FAILED_VMENTRY; | |
7566 | vmcs12->exit_qualification = qualification; | |
7567 | nested_vmx_succeed(vcpu); | |
7568 | } | |
7569 | ||
8a76d7f2 JR |
7570 | static int vmx_check_intercept(struct kvm_vcpu *vcpu, |
7571 | struct x86_instruction_info *info, | |
7572 | enum x86_intercept_stage stage) | |
7573 | { | |
7574 | return X86EMUL_CONTINUE; | |
7575 | } | |
7576 | ||
cbdd1bea | 7577 | static struct kvm_x86_ops vmx_x86_ops = { |
6aa8b732 AK |
7578 | .cpu_has_kvm_support = cpu_has_kvm_support, |
7579 | .disabled_by_bios = vmx_disabled_by_bios, | |
7580 | .hardware_setup = hardware_setup, | |
7581 | .hardware_unsetup = hardware_unsetup, | |
002c7f7c | 7582 | .check_processor_compatibility = vmx_check_processor_compat, |
6aa8b732 AK |
7583 | .hardware_enable = hardware_enable, |
7584 | .hardware_disable = hardware_disable, | |
04547156 | 7585 | .cpu_has_accelerated_tpr = report_flexpriority, |
6aa8b732 AK |
7586 | |
7587 | .vcpu_create = vmx_create_vcpu, | |
7588 | .vcpu_free = vmx_free_vcpu, | |
04d2cc77 | 7589 | .vcpu_reset = vmx_vcpu_reset, |
6aa8b732 | 7590 | |
04d2cc77 | 7591 | .prepare_guest_switch = vmx_save_host_state, |
6aa8b732 AK |
7592 | .vcpu_load = vmx_vcpu_load, |
7593 | .vcpu_put = vmx_vcpu_put, | |
7594 | ||
c8639010 | 7595 | .update_db_bp_intercept = update_exception_bitmap, |
6aa8b732 AK |
7596 | .get_msr = vmx_get_msr, |
7597 | .set_msr = vmx_set_msr, | |
7598 | .get_segment_base = vmx_get_segment_base, | |
7599 | .get_segment = vmx_get_segment, | |
7600 | .set_segment = vmx_set_segment, | |
2e4d2653 | 7601 | .get_cpl = vmx_get_cpl, |
6aa8b732 | 7602 | .get_cs_db_l_bits = vmx_get_cs_db_l_bits, |
e8467fda | 7603 | .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits, |
aff48baa | 7604 | .decache_cr3 = vmx_decache_cr3, |
25c4c276 | 7605 | .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits, |
6aa8b732 | 7606 | .set_cr0 = vmx_set_cr0, |
6aa8b732 AK |
7607 | .set_cr3 = vmx_set_cr3, |
7608 | .set_cr4 = vmx_set_cr4, | |
6aa8b732 | 7609 | .set_efer = vmx_set_efer, |
6aa8b732 AK |
7610 | .get_idt = vmx_get_idt, |
7611 | .set_idt = vmx_set_idt, | |
7612 | .get_gdt = vmx_get_gdt, | |
7613 | .set_gdt = vmx_set_gdt, | |
020df079 | 7614 | .set_dr7 = vmx_set_dr7, |
5fdbf976 | 7615 | .cache_reg = vmx_cache_reg, |
6aa8b732 AK |
7616 | .get_rflags = vmx_get_rflags, |
7617 | .set_rflags = vmx_set_rflags, | |
ebcbab4c | 7618 | .fpu_activate = vmx_fpu_activate, |
02daab21 | 7619 | .fpu_deactivate = vmx_fpu_deactivate, |
6aa8b732 AK |
7620 | |
7621 | .tlb_flush = vmx_flush_tlb, | |
6aa8b732 | 7622 | |
6aa8b732 | 7623 | .run = vmx_vcpu_run, |
6062d012 | 7624 | .handle_exit = vmx_handle_exit, |
6aa8b732 | 7625 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
7626 | .set_interrupt_shadow = vmx_set_interrupt_shadow, |
7627 | .get_interrupt_shadow = vmx_get_interrupt_shadow, | |
102d8325 | 7628 | .patch_hypercall = vmx_patch_hypercall, |
2a8067f1 | 7629 | .set_irq = vmx_inject_irq, |
95ba8273 | 7630 | .set_nmi = vmx_inject_nmi, |
298101da | 7631 | .queue_exception = vmx_queue_exception, |
b463a6f7 | 7632 | .cancel_injection = vmx_cancel_injection, |
78646121 | 7633 | .interrupt_allowed = vmx_interrupt_allowed, |
95ba8273 | 7634 | .nmi_allowed = vmx_nmi_allowed, |
3cfc3092 JK |
7635 | .get_nmi_mask = vmx_get_nmi_mask, |
7636 | .set_nmi_mask = vmx_set_nmi_mask, | |
95ba8273 GN |
7637 | .enable_nmi_window = enable_nmi_window, |
7638 | .enable_irq_window = enable_irq_window, | |
7639 | .update_cr8_intercept = update_cr8_intercept, | |
8d14695f | 7640 | .set_virtual_x2apic_mode = vmx_set_virtual_x2apic_mode, |
c7c9c56c YZ |
7641 | .vm_has_apicv = vmx_vm_has_apicv, |
7642 | .load_eoi_exitmap = vmx_load_eoi_exitmap, | |
7643 | .hwapic_irr_update = vmx_hwapic_irr_update, | |
7644 | .hwapic_isr_update = vmx_hwapic_isr_update, | |
95ba8273 | 7645 | |
cbc94022 | 7646 | .set_tss_addr = vmx_set_tss_addr, |
67253af5 | 7647 | .get_tdp_level = get_ept_level, |
4b12f0de | 7648 | .get_mt_mask = vmx_get_mt_mask, |
229456fc | 7649 | |
586f9607 | 7650 | .get_exit_info = vmx_get_exit_info, |
586f9607 | 7651 | |
17cc3935 | 7652 | .get_lpage_level = vmx_get_lpage_level, |
0e851880 SY |
7653 | |
7654 | .cpuid_update = vmx_cpuid_update, | |
4e47c7a6 SY |
7655 | |
7656 | .rdtscp_supported = vmx_rdtscp_supported, | |
ad756a16 | 7657 | .invpcid_supported = vmx_invpcid_supported, |
d4330ef2 JR |
7658 | |
7659 | .set_supported_cpuid = vmx_set_supported_cpuid, | |
f5f48ee1 SY |
7660 | |
7661 | .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit, | |
99e3e30a | 7662 | |
4051b188 | 7663 | .set_tsc_khz = vmx_set_tsc_khz, |
ba904635 | 7664 | .read_tsc_offset = vmx_read_tsc_offset, |
99e3e30a | 7665 | .write_tsc_offset = vmx_write_tsc_offset, |
e48672fa | 7666 | .adjust_tsc_offset = vmx_adjust_tsc_offset, |
857e4099 | 7667 | .compute_tsc_offset = vmx_compute_tsc_offset, |
d5c1785d | 7668 | .read_l1_tsc = vmx_read_l1_tsc, |
1c97f0a0 JR |
7669 | |
7670 | .set_tdp_cr3 = vmx_set_cr3, | |
8a76d7f2 JR |
7671 | |
7672 | .check_intercept = vmx_check_intercept, | |
6aa8b732 AK |
7673 | }; |
7674 | ||
7675 | static int __init vmx_init(void) | |
7676 | { | |
8d14695f | 7677 | int r, i, msr; |
26bb0981 AK |
7678 | |
7679 | rdmsrl_safe(MSR_EFER, &host_efer); | |
7680 | ||
7681 | for (i = 0; i < NR_VMX_MSR; ++i) | |
7682 | kvm_define_shared_msr(i, vmx_msr_index[i]); | |
fdef3ad1 | 7683 | |
3e7c73e9 | 7684 | vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL); |
fdef3ad1 HQ |
7685 | if (!vmx_io_bitmap_a) |
7686 | return -ENOMEM; | |
7687 | ||
2106a548 GC |
7688 | r = -ENOMEM; |
7689 | ||
3e7c73e9 | 7690 | vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL); |
2106a548 | 7691 | if (!vmx_io_bitmap_b) |
fdef3ad1 | 7692 | goto out; |
fdef3ad1 | 7693 | |
5897297b | 7694 | vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL); |
2106a548 | 7695 | if (!vmx_msr_bitmap_legacy) |
25c5f225 | 7696 | goto out1; |
2106a548 | 7697 | |
8d14695f YZ |
7698 | vmx_msr_bitmap_legacy_x2apic = |
7699 | (unsigned long *)__get_free_page(GFP_KERNEL); | |
7700 | if (!vmx_msr_bitmap_legacy_x2apic) | |
7701 | goto out2; | |
25c5f225 | 7702 | |
5897297b | 7703 | vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL); |
2106a548 | 7704 | if (!vmx_msr_bitmap_longmode) |
8d14695f | 7705 | goto out3; |
2106a548 | 7706 | |
8d14695f YZ |
7707 | vmx_msr_bitmap_longmode_x2apic = |
7708 | (unsigned long *)__get_free_page(GFP_KERNEL); | |
7709 | if (!vmx_msr_bitmap_longmode_x2apic) | |
7710 | goto out4; | |
5897297b | 7711 | |
fdef3ad1 HQ |
7712 | /* |
7713 | * Allow direct access to the PC debug port (it is often used for I/O | |
7714 | * delays, but the vmexits simply slow things down). | |
7715 | */ | |
3e7c73e9 AK |
7716 | memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE); |
7717 | clear_bit(0x80, vmx_io_bitmap_a); | |
fdef3ad1 | 7718 | |
3e7c73e9 | 7719 | memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE); |
fdef3ad1 | 7720 | |
5897297b AK |
7721 | memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE); |
7722 | memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE); | |
25c5f225 | 7723 | |
2384d2b3 SY |
7724 | set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */ |
7725 | ||
0ee75bea AK |
7726 | r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), |
7727 | __alignof__(struct vcpu_vmx), THIS_MODULE); | |
fdef3ad1 | 7728 | if (r) |
5897297b | 7729 | goto out3; |
25c5f225 | 7730 | |
8f536b76 ZY |
7731 | #ifdef CONFIG_KEXEC |
7732 | rcu_assign_pointer(crash_vmclear_loaded_vmcss, | |
7733 | crash_vmclear_local_loaded_vmcss); | |
7734 | #endif | |
7735 | ||
5897297b AK |
7736 | vmx_disable_intercept_for_msr(MSR_FS_BASE, false); |
7737 | vmx_disable_intercept_for_msr(MSR_GS_BASE, false); | |
7738 | vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true); | |
7739 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false); | |
7740 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false); | |
7741 | vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false); | |
8d14695f YZ |
7742 | memcpy(vmx_msr_bitmap_legacy_x2apic, |
7743 | vmx_msr_bitmap_legacy, PAGE_SIZE); | |
7744 | memcpy(vmx_msr_bitmap_longmode_x2apic, | |
7745 | vmx_msr_bitmap_longmode, PAGE_SIZE); | |
7746 | ||
c7c9c56c | 7747 | if (enable_apicv_reg_vid) { |
8d14695f YZ |
7748 | for (msr = 0x800; msr <= 0x8ff; msr++) |
7749 | vmx_disable_intercept_msr_read_x2apic(msr); | |
7750 | ||
7751 | /* According SDM, in x2apic mode, the whole id reg is used. | |
7752 | * But in KVM, it only use the highest eight bits. Need to | |
7753 | * intercept it */ | |
7754 | vmx_enable_intercept_msr_read_x2apic(0x802); | |
7755 | /* TMCCT */ | |
7756 | vmx_enable_intercept_msr_read_x2apic(0x839); | |
7757 | /* TPR */ | |
7758 | vmx_disable_intercept_msr_write_x2apic(0x808); | |
c7c9c56c YZ |
7759 | /* EOI */ |
7760 | vmx_disable_intercept_msr_write_x2apic(0x80b); | |
7761 | /* SELF-IPI */ | |
7762 | vmx_disable_intercept_msr_write_x2apic(0x83f); | |
8d14695f | 7763 | } |
fdef3ad1 | 7764 | |
089d034e | 7765 | if (enable_ept) { |
3f6d8c8a XH |
7766 | kvm_mmu_set_mask_ptes(0ull, |
7767 | (enable_ept_ad_bits) ? VMX_EPT_ACCESS_BIT : 0ull, | |
7768 | (enable_ept_ad_bits) ? VMX_EPT_DIRTY_BIT : 0ull, | |
7769 | 0ull, VMX_EPT_EXECUTABLE_MASK); | |
ce88decf | 7770 | ept_set_mmio_spte_mask(); |
5fdbcb9d SY |
7771 | kvm_enable_tdp(); |
7772 | } else | |
7773 | kvm_disable_tdp(); | |
1439442c | 7774 | |
fdef3ad1 HQ |
7775 | return 0; |
7776 | ||
8d14695f | 7777 | out4: |
5897297b | 7778 | free_page((unsigned long)vmx_msr_bitmap_longmode); |
8d14695f YZ |
7779 | out3: |
7780 | free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic); | |
25c5f225 | 7781 | out2: |
5897297b | 7782 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
fdef3ad1 | 7783 | out1: |
3e7c73e9 | 7784 | free_page((unsigned long)vmx_io_bitmap_b); |
fdef3ad1 | 7785 | out: |
3e7c73e9 | 7786 | free_page((unsigned long)vmx_io_bitmap_a); |
fdef3ad1 | 7787 | return r; |
6aa8b732 AK |
7788 | } |
7789 | ||
7790 | static void __exit vmx_exit(void) | |
7791 | { | |
8d14695f YZ |
7792 | free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic); |
7793 | free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic); | |
5897297b AK |
7794 | free_page((unsigned long)vmx_msr_bitmap_legacy); |
7795 | free_page((unsigned long)vmx_msr_bitmap_longmode); | |
3e7c73e9 AK |
7796 | free_page((unsigned long)vmx_io_bitmap_b); |
7797 | free_page((unsigned long)vmx_io_bitmap_a); | |
fdef3ad1 | 7798 | |
8f536b76 ZY |
7799 | #ifdef CONFIG_KEXEC |
7800 | rcu_assign_pointer(crash_vmclear_loaded_vmcss, NULL); | |
7801 | synchronize_rcu(); | |
7802 | #endif | |
7803 | ||
cb498ea2 | 7804 | kvm_exit(); |
6aa8b732 AK |
7805 | } |
7806 | ||
7807 | module_init(vmx_init) | |
7808 | module_exit(vmx_exit) |