Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * AMD SVM support | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
9611c187 | 7 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
6aa8b732 AK |
8 | * |
9 | * Authors: | |
10 | * Yaniv Kamay <yaniv@qumranet.com> | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
edf88417 AK |
17 | #include <linux/kvm_host.h> |
18 | ||
85f455f7 | 19 | #include "irq.h" |
1d737c8a | 20 | #include "mmu.h" |
5fdbf976 | 21 | #include "kvm_cache_regs.h" |
fe4c7b19 | 22 | #include "x86.h" |
e495606d | 23 | |
6aa8b732 | 24 | #include <linux/module.h> |
9d8f549d | 25 | #include <linux/kernel.h> |
6aa8b732 AK |
26 | #include <linux/vmalloc.h> |
27 | #include <linux/highmem.h> | |
e8edc6e0 | 28 | #include <linux/sched.h> |
229456fc | 29 | #include <linux/ftrace_event.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
6aa8b732 | 31 | |
67ec6607 | 32 | #include <asm/tlbflush.h> |
e495606d | 33 | #include <asm/desc.h> |
631bc487 | 34 | #include <asm/kvm_para.h> |
6aa8b732 | 35 | |
63d1142f | 36 | #include <asm/virtext.h> |
229456fc | 37 | #include "trace.h" |
63d1142f | 38 | |
4ecac3fd AK |
39 | #define __ex(x) __kvm_handle_fault_on_reboot(x) |
40 | ||
6aa8b732 AK |
41 | MODULE_AUTHOR("Qumranet"); |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | #define IOPM_ALLOC_ORDER 2 | |
45 | #define MSRPM_ALLOC_ORDER 1 | |
46 | ||
6aa8b732 AK |
47 | #define SEG_TYPE_LDT 2 |
48 | #define SEG_TYPE_BUSY_TSS16 3 | |
49 | ||
6bc31bdc AP |
50 | #define SVM_FEATURE_NPT (1 << 0) |
51 | #define SVM_FEATURE_LBRV (1 << 1) | |
52 | #define SVM_FEATURE_SVML (1 << 2) | |
53 | #define SVM_FEATURE_NRIP (1 << 3) | |
54 | #define SVM_FEATURE_PAUSE_FILTER (1 << 10) | |
80b7706e | 55 | |
410e4d57 JR |
56 | #define NESTED_EXIT_HOST 0 /* Exit handled on host level */ |
57 | #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */ | |
58 | #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */ | |
59 | ||
24e09cbf JR |
60 | #define DEBUGCTL_RESERVED_BITS (~(0x3fULL)) |
61 | ||
67ec6607 JR |
62 | static bool erratum_383_found __read_mostly; |
63 | ||
6c8166a7 AK |
64 | static const u32 host_save_user_msrs[] = { |
65 | #ifdef CONFIG_X86_64 | |
66 | MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE, | |
67 | MSR_FS_BASE, | |
68 | #endif | |
69 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
70 | }; | |
71 | ||
72 | #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs) | |
73 | ||
74 | struct kvm_vcpu; | |
75 | ||
e6aa9abd JR |
76 | struct nested_state { |
77 | struct vmcb *hsave; | |
78 | u64 hsave_msr; | |
4a810181 | 79 | u64 vm_cr_msr; |
e6aa9abd JR |
80 | u64 vmcb; |
81 | ||
82 | /* These are the merged vectors */ | |
83 | u32 *msrpm; | |
84 | ||
85 | /* gpa pointers to the real vectors */ | |
86 | u64 vmcb_msrpm; | |
ce2ac085 | 87 | u64 vmcb_iopm; |
aad42c64 | 88 | |
cd3ff653 JR |
89 | /* A VMEXIT is required but not yet emulated */ |
90 | bool exit_required; | |
91 | ||
cda00082 JR |
92 | /* |
93 | * If we vmexit during an instruction emulation we need this to restore | |
94 | * the l1 guest rip after the emulation | |
95 | */ | |
96 | unsigned long vmexit_rip; | |
97 | unsigned long vmexit_rsp; | |
98 | unsigned long vmexit_rax; | |
99 | ||
aad42c64 | 100 | /* cache for intercepts of the guest */ |
4ee546b4 | 101 | u32 intercept_cr; |
3aed041a | 102 | u32 intercept_dr; |
aad42c64 JR |
103 | u32 intercept_exceptions; |
104 | u64 intercept; | |
105 | ||
5bd2edc3 JR |
106 | /* Nested Paging related state */ |
107 | u64 nested_cr3; | |
e6aa9abd JR |
108 | }; |
109 | ||
323c3d80 JR |
110 | #define MSRPM_OFFSETS 16 |
111 | static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly; | |
112 | ||
6c8166a7 AK |
113 | struct vcpu_svm { |
114 | struct kvm_vcpu vcpu; | |
115 | struct vmcb *vmcb; | |
116 | unsigned long vmcb_pa; | |
117 | struct svm_cpu_data *svm_data; | |
118 | uint64_t asid_generation; | |
119 | uint64_t sysenter_esp; | |
120 | uint64_t sysenter_eip; | |
121 | ||
122 | u64 next_rip; | |
123 | ||
124 | u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS]; | |
afe9e66f | 125 | struct { |
dacccfdd AK |
126 | u16 fs; |
127 | u16 gs; | |
128 | u16 ldt; | |
afe9e66f AK |
129 | u64 gs_base; |
130 | } host; | |
6c8166a7 AK |
131 | |
132 | u32 *msrpm; | |
6c8166a7 | 133 | |
e6aa9abd | 134 | struct nested_state nested; |
6be7d306 JK |
135 | |
136 | bool nmi_singlestep; | |
66b7138f JK |
137 | |
138 | unsigned int3_injected; | |
139 | unsigned long int3_rip; | |
631bc487 | 140 | u32 apf_reason; |
6c8166a7 AK |
141 | }; |
142 | ||
455716fa JR |
143 | #define MSR_INVALID 0xffffffffU |
144 | ||
ac72a9b7 JR |
145 | static struct svm_direct_access_msrs { |
146 | u32 index; /* Index of the MSR */ | |
147 | bool always; /* True if intercept is always on */ | |
148 | } direct_access_msrs[] = { | |
8c06585d | 149 | { .index = MSR_STAR, .always = true }, |
ac72a9b7 JR |
150 | { .index = MSR_IA32_SYSENTER_CS, .always = true }, |
151 | #ifdef CONFIG_X86_64 | |
152 | { .index = MSR_GS_BASE, .always = true }, | |
153 | { .index = MSR_FS_BASE, .always = true }, | |
154 | { .index = MSR_KERNEL_GS_BASE, .always = true }, | |
155 | { .index = MSR_LSTAR, .always = true }, | |
156 | { .index = MSR_CSTAR, .always = true }, | |
157 | { .index = MSR_SYSCALL_MASK, .always = true }, | |
158 | #endif | |
159 | { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false }, | |
160 | { .index = MSR_IA32_LASTBRANCHTOIP, .always = false }, | |
161 | { .index = MSR_IA32_LASTINTFROMIP, .always = false }, | |
162 | { .index = MSR_IA32_LASTINTTOIP, .always = false }, | |
163 | { .index = MSR_INVALID, .always = false }, | |
6c8166a7 AK |
164 | }; |
165 | ||
709ddebf JR |
166 | /* enable NPT for AMD64 and X86 with PAE */ |
167 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
168 | static bool npt_enabled = true; | |
169 | #else | |
e0231715 | 170 | static bool npt_enabled; |
709ddebf | 171 | #endif |
6c7dac72 JR |
172 | static int npt = 1; |
173 | ||
174 | module_param(npt, int, S_IRUGO); | |
e3da3acd | 175 | |
4b6e4dca | 176 | static int nested = 1; |
236de055 AG |
177 | module_param(nested, int, S_IRUGO); |
178 | ||
44874f84 | 179 | static void svm_flush_tlb(struct kvm_vcpu *vcpu); |
a5c3832d | 180 | static void svm_complete_interrupts(struct vcpu_svm *svm); |
04d2cc77 | 181 | |
410e4d57 | 182 | static int nested_svm_exit_handled(struct vcpu_svm *svm); |
b8e88bc8 | 183 | static int nested_svm_intercept(struct vcpu_svm *svm); |
cf74a78b | 184 | static int nested_svm_vmexit(struct vcpu_svm *svm); |
cf74a78b AG |
185 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
186 | bool has_error_code, u32 error_code); | |
187 | ||
8d28fec4 | 188 | enum { |
116a0a23 JR |
189 | VMCB_INTERCEPTS, /* Intercept vectors, TSC offset, |
190 | pause filter count */ | |
f56838e4 | 191 | VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */ |
d48086d1 | 192 | VMCB_ASID, /* ASID */ |
decdbf6a | 193 | VMCB_INTR, /* int_ctl, int_vector */ |
8d28fec4 RJ |
194 | VMCB_DIRTY_MAX, |
195 | }; | |
196 | ||
decdbf6a JR |
197 | /* TPR is always written before VMRUN */ |
198 | #define VMCB_ALWAYS_DIRTY_MASK (1U << VMCB_INTR) | |
8d28fec4 RJ |
199 | |
200 | static inline void mark_all_dirty(struct vmcb *vmcb) | |
201 | { | |
202 | vmcb->control.clean = 0; | |
203 | } | |
204 | ||
205 | static inline void mark_all_clean(struct vmcb *vmcb) | |
206 | { | |
207 | vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1) | |
208 | & ~VMCB_ALWAYS_DIRTY_MASK; | |
209 | } | |
210 | ||
211 | static inline void mark_dirty(struct vmcb *vmcb, int bit) | |
212 | { | |
213 | vmcb->control.clean &= ~(1 << bit); | |
214 | } | |
215 | ||
a2fa3e9f GH |
216 | static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) |
217 | { | |
fb3f0f51 | 218 | return container_of(vcpu, struct vcpu_svm, vcpu); |
a2fa3e9f GH |
219 | } |
220 | ||
384c6368 JR |
221 | static void recalc_intercepts(struct vcpu_svm *svm) |
222 | { | |
223 | struct vmcb_control_area *c, *h; | |
224 | struct nested_state *g; | |
225 | ||
116a0a23 JR |
226 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); |
227 | ||
384c6368 JR |
228 | if (!is_guest_mode(&svm->vcpu)) |
229 | return; | |
230 | ||
231 | c = &svm->vmcb->control; | |
232 | h = &svm->nested.hsave->control; | |
233 | g = &svm->nested; | |
234 | ||
4ee546b4 | 235 | c->intercept_cr = h->intercept_cr | g->intercept_cr; |
3aed041a | 236 | c->intercept_dr = h->intercept_dr | g->intercept_dr; |
384c6368 JR |
237 | c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions; |
238 | c->intercept = h->intercept | g->intercept; | |
239 | } | |
240 | ||
4ee546b4 RJ |
241 | static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm) |
242 | { | |
243 | if (is_guest_mode(&svm->vcpu)) | |
244 | return svm->nested.hsave; | |
245 | else | |
246 | return svm->vmcb; | |
247 | } | |
248 | ||
249 | static inline void set_cr_intercept(struct vcpu_svm *svm, int bit) | |
250 | { | |
251 | struct vmcb *vmcb = get_host_vmcb(svm); | |
252 | ||
253 | vmcb->control.intercept_cr |= (1U << bit); | |
254 | ||
255 | recalc_intercepts(svm); | |
256 | } | |
257 | ||
258 | static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit) | |
259 | { | |
260 | struct vmcb *vmcb = get_host_vmcb(svm); | |
261 | ||
262 | vmcb->control.intercept_cr &= ~(1U << bit); | |
263 | ||
264 | recalc_intercepts(svm); | |
265 | } | |
266 | ||
267 | static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit) | |
268 | { | |
269 | struct vmcb *vmcb = get_host_vmcb(svm); | |
270 | ||
271 | return vmcb->control.intercept_cr & (1U << bit); | |
272 | } | |
273 | ||
3aed041a JR |
274 | static inline void set_dr_intercept(struct vcpu_svm *svm, int bit) |
275 | { | |
276 | struct vmcb *vmcb = get_host_vmcb(svm); | |
277 | ||
278 | vmcb->control.intercept_dr |= (1U << bit); | |
279 | ||
280 | recalc_intercepts(svm); | |
281 | } | |
282 | ||
283 | static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit) | |
284 | { | |
285 | struct vmcb *vmcb = get_host_vmcb(svm); | |
286 | ||
287 | vmcb->control.intercept_dr &= ~(1U << bit); | |
288 | ||
289 | recalc_intercepts(svm); | |
290 | } | |
291 | ||
18c918c5 JR |
292 | static inline void set_exception_intercept(struct vcpu_svm *svm, int bit) |
293 | { | |
294 | struct vmcb *vmcb = get_host_vmcb(svm); | |
295 | ||
296 | vmcb->control.intercept_exceptions |= (1U << bit); | |
297 | ||
298 | recalc_intercepts(svm); | |
299 | } | |
300 | ||
301 | static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit) | |
302 | { | |
303 | struct vmcb *vmcb = get_host_vmcb(svm); | |
304 | ||
305 | vmcb->control.intercept_exceptions &= ~(1U << bit); | |
306 | ||
307 | recalc_intercepts(svm); | |
308 | } | |
309 | ||
8a05a1b8 JR |
310 | static inline void set_intercept(struct vcpu_svm *svm, int bit) |
311 | { | |
312 | struct vmcb *vmcb = get_host_vmcb(svm); | |
313 | ||
314 | vmcb->control.intercept |= (1ULL << bit); | |
315 | ||
316 | recalc_intercepts(svm); | |
317 | } | |
318 | ||
319 | static inline void clr_intercept(struct vcpu_svm *svm, int bit) | |
320 | { | |
321 | struct vmcb *vmcb = get_host_vmcb(svm); | |
322 | ||
323 | vmcb->control.intercept &= ~(1ULL << bit); | |
324 | ||
325 | recalc_intercepts(svm); | |
326 | } | |
327 | ||
2af9194d JR |
328 | static inline void enable_gif(struct vcpu_svm *svm) |
329 | { | |
330 | svm->vcpu.arch.hflags |= HF_GIF_MASK; | |
331 | } | |
332 | ||
333 | static inline void disable_gif(struct vcpu_svm *svm) | |
334 | { | |
335 | svm->vcpu.arch.hflags &= ~HF_GIF_MASK; | |
336 | } | |
337 | ||
338 | static inline bool gif_set(struct vcpu_svm *svm) | |
339 | { | |
340 | return !!(svm->vcpu.arch.hflags & HF_GIF_MASK); | |
341 | } | |
342 | ||
4866d5e3 | 343 | static unsigned long iopm_base; |
6aa8b732 AK |
344 | |
345 | struct kvm_ldttss_desc { | |
346 | u16 limit0; | |
347 | u16 base0; | |
e0231715 JR |
348 | unsigned base1:8, type:5, dpl:2, p:1; |
349 | unsigned limit1:4, zero0:3, g:1, base2:8; | |
6aa8b732 AK |
350 | u32 base3; |
351 | u32 zero1; | |
352 | } __attribute__((packed)); | |
353 | ||
354 | struct svm_cpu_data { | |
355 | int cpu; | |
356 | ||
5008fdf5 AK |
357 | u64 asid_generation; |
358 | u32 max_asid; | |
359 | u32 next_asid; | |
6aa8b732 AK |
360 | struct kvm_ldttss_desc *tss_desc; |
361 | ||
362 | struct page *save_area; | |
363 | }; | |
364 | ||
365 | static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); | |
80b7706e | 366 | static uint32_t svm_features; |
6aa8b732 AK |
367 | |
368 | struct svm_init_data { | |
369 | int cpu; | |
370 | int r; | |
371 | }; | |
372 | ||
373 | static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000}; | |
374 | ||
9d8f549d | 375 | #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges) |
6aa8b732 AK |
376 | #define MSRS_RANGE_SIZE 2048 |
377 | #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2) | |
378 | ||
455716fa JR |
379 | static u32 svm_msrpm_offset(u32 msr) |
380 | { | |
381 | u32 offset; | |
382 | int i; | |
383 | ||
384 | for (i = 0; i < NUM_MSR_MAPS; i++) { | |
385 | if (msr < msrpm_ranges[i] || | |
386 | msr >= msrpm_ranges[i] + MSRS_IN_RANGE) | |
387 | continue; | |
388 | ||
389 | offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */ | |
390 | offset += (i * MSRS_RANGE_SIZE); /* add range offset */ | |
391 | ||
392 | /* Now we have the u8 offset - but need the u32 offset */ | |
393 | return offset / 4; | |
394 | } | |
395 | ||
396 | /* MSR not in any range */ | |
397 | return MSR_INVALID; | |
398 | } | |
399 | ||
6aa8b732 AK |
400 | #define MAX_INST_SIZE 15 |
401 | ||
6aa8b732 AK |
402 | static inline void clgi(void) |
403 | { | |
4ecac3fd | 404 | asm volatile (__ex(SVM_CLGI)); |
6aa8b732 AK |
405 | } |
406 | ||
407 | static inline void stgi(void) | |
408 | { | |
4ecac3fd | 409 | asm volatile (__ex(SVM_STGI)); |
6aa8b732 AK |
410 | } |
411 | ||
412 | static inline void invlpga(unsigned long addr, u32 asid) | |
413 | { | |
e0231715 | 414 | asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid)); |
6aa8b732 AK |
415 | } |
416 | ||
6aa8b732 AK |
417 | static inline void force_new_asid(struct kvm_vcpu *vcpu) |
418 | { | |
a2fa3e9f | 419 | to_svm(vcpu)->asid_generation--; |
6aa8b732 AK |
420 | } |
421 | ||
422 | static inline void flush_guest_tlb(struct kvm_vcpu *vcpu) | |
423 | { | |
424 | force_new_asid(vcpu); | |
425 | } | |
426 | ||
4b16184c JR |
427 | static int get_npt_level(void) |
428 | { | |
429 | #ifdef CONFIG_X86_64 | |
430 | return PT64_ROOT_LEVEL; | |
431 | #else | |
432 | return PT32E_ROOT_LEVEL; | |
433 | #endif | |
434 | } | |
435 | ||
6aa8b732 AK |
436 | static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer) |
437 | { | |
6dc696d4 | 438 | vcpu->arch.efer = efer; |
709ddebf | 439 | if (!npt_enabled && !(efer & EFER_LMA)) |
2b5203ee | 440 | efer &= ~EFER_LME; |
6aa8b732 | 441 | |
9962d032 | 442 | to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME; |
6aa8b732 AK |
443 | } |
444 | ||
6aa8b732 AK |
445 | static int is_external_interrupt(u32 info) |
446 | { | |
447 | info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; | |
448 | return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR); | |
449 | } | |
450 | ||
2809f5d2 GC |
451 | static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) |
452 | { | |
453 | struct vcpu_svm *svm = to_svm(vcpu); | |
454 | u32 ret = 0; | |
455 | ||
456 | if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) | |
48005f64 | 457 | ret |= KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS; |
2809f5d2 GC |
458 | return ret & mask; |
459 | } | |
460 | ||
461 | static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
462 | { | |
463 | struct vcpu_svm *svm = to_svm(vcpu); | |
464 | ||
465 | if (mask == 0) | |
466 | svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK; | |
467 | else | |
468 | svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK; | |
469 | ||
470 | } | |
471 | ||
6aa8b732 AK |
472 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) |
473 | { | |
a2fa3e9f GH |
474 | struct vcpu_svm *svm = to_svm(vcpu); |
475 | ||
6bc31bdc AP |
476 | if (svm->vmcb->control.next_rip != 0) |
477 | svm->next_rip = svm->vmcb->control.next_rip; | |
478 | ||
a2fa3e9f | 479 | if (!svm->next_rip) { |
851ba692 | 480 | if (emulate_instruction(vcpu, 0, 0, EMULTYPE_SKIP) != |
f629cf84 GN |
481 | EMULATE_DONE) |
482 | printk(KERN_DEBUG "%s: NOP\n", __func__); | |
6aa8b732 AK |
483 | return; |
484 | } | |
5fdbf976 MT |
485 | if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE) |
486 | printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n", | |
487 | __func__, kvm_rip_read(vcpu), svm->next_rip); | |
6aa8b732 | 488 | |
5fdbf976 | 489 | kvm_rip_write(vcpu, svm->next_rip); |
2809f5d2 | 490 | svm_set_interrupt_shadow(vcpu, 0); |
6aa8b732 AK |
491 | } |
492 | ||
116a4752 | 493 | static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, |
ce7ddec4 JR |
494 | bool has_error_code, u32 error_code, |
495 | bool reinject) | |
116a4752 JK |
496 | { |
497 | struct vcpu_svm *svm = to_svm(vcpu); | |
498 | ||
e0231715 JR |
499 | /* |
500 | * If we are within a nested VM we'd better #VMEXIT and let the guest | |
501 | * handle the exception | |
502 | */ | |
ce7ddec4 JR |
503 | if (!reinject && |
504 | nested_svm_check_exception(svm, nr, has_error_code, error_code)) | |
116a4752 JK |
505 | return; |
506 | ||
2a6b20b8 | 507 | if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) { |
66b7138f JK |
508 | unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu); |
509 | ||
510 | /* | |
511 | * For guest debugging where we have to reinject #BP if some | |
512 | * INT3 is guest-owned: | |
513 | * Emulate nRIP by moving RIP forward. Will fail if injection | |
514 | * raises a fault that is not intercepted. Still better than | |
515 | * failing in all cases. | |
516 | */ | |
517 | skip_emulated_instruction(&svm->vcpu); | |
518 | rip = kvm_rip_read(&svm->vcpu); | |
519 | svm->int3_rip = rip + svm->vmcb->save.cs.base; | |
520 | svm->int3_injected = rip - old_rip; | |
521 | } | |
522 | ||
116a4752 JK |
523 | svm->vmcb->control.event_inj = nr |
524 | | SVM_EVTINJ_VALID | |
525 | | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0) | |
526 | | SVM_EVTINJ_TYPE_EXEPT; | |
527 | svm->vmcb->control.event_inj_err = error_code; | |
528 | } | |
529 | ||
67ec6607 JR |
530 | static void svm_init_erratum_383(void) |
531 | { | |
532 | u32 low, high; | |
533 | int err; | |
534 | u64 val; | |
535 | ||
1be85a6d | 536 | if (!cpu_has_amd_erratum(amd_erratum_383)) |
67ec6607 JR |
537 | return; |
538 | ||
539 | /* Use _safe variants to not break nested virtualization */ | |
540 | val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err); | |
541 | if (err) | |
542 | return; | |
543 | ||
544 | val |= (1ULL << 47); | |
545 | ||
546 | low = lower_32_bits(val); | |
547 | high = upper_32_bits(val); | |
548 | ||
549 | native_write_msr_safe(MSR_AMD64_DC_CFG, low, high); | |
550 | ||
551 | erratum_383_found = true; | |
552 | } | |
553 | ||
6aa8b732 AK |
554 | static int has_svm(void) |
555 | { | |
63d1142f | 556 | const char *msg; |
6aa8b732 | 557 | |
63d1142f | 558 | if (!cpu_has_svm(&msg)) { |
ff81ff10 | 559 | printk(KERN_INFO "has_svm: %s\n", msg); |
6aa8b732 AK |
560 | return 0; |
561 | } | |
562 | ||
6aa8b732 AK |
563 | return 1; |
564 | } | |
565 | ||
566 | static void svm_hardware_disable(void *garbage) | |
567 | { | |
2c8dceeb | 568 | cpu_svm_disable(); |
6aa8b732 AK |
569 | } |
570 | ||
10474ae8 | 571 | static int svm_hardware_enable(void *garbage) |
6aa8b732 AK |
572 | { |
573 | ||
0fe1e009 | 574 | struct svm_cpu_data *sd; |
6aa8b732 | 575 | uint64_t efer; |
89a27f4d | 576 | struct desc_ptr gdt_descr; |
6aa8b732 AK |
577 | struct desc_struct *gdt; |
578 | int me = raw_smp_processor_id(); | |
579 | ||
10474ae8 AG |
580 | rdmsrl(MSR_EFER, efer); |
581 | if (efer & EFER_SVME) | |
582 | return -EBUSY; | |
583 | ||
6aa8b732 | 584 | if (!has_svm()) { |
e6732a5a ZA |
585 | printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n", |
586 | me); | |
10474ae8 | 587 | return -EINVAL; |
6aa8b732 | 588 | } |
0fe1e009 | 589 | sd = per_cpu(svm_data, me); |
6aa8b732 | 590 | |
0fe1e009 | 591 | if (!sd) { |
e6732a5a | 592 | printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n", |
6aa8b732 | 593 | me); |
10474ae8 | 594 | return -EINVAL; |
6aa8b732 AK |
595 | } |
596 | ||
0fe1e009 TH |
597 | sd->asid_generation = 1; |
598 | sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; | |
599 | sd->next_asid = sd->max_asid + 1; | |
6aa8b732 | 600 | |
d6ab1ed4 | 601 | native_store_gdt(&gdt_descr); |
89a27f4d | 602 | gdt = (struct desc_struct *)gdt_descr.address; |
0fe1e009 | 603 | sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); |
6aa8b732 | 604 | |
9962d032 | 605 | wrmsrl(MSR_EFER, efer | EFER_SVME); |
6aa8b732 | 606 | |
d0316554 | 607 | wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT); |
10474ae8 | 608 | |
67ec6607 JR |
609 | svm_init_erratum_383(); |
610 | ||
10474ae8 | 611 | return 0; |
6aa8b732 AK |
612 | } |
613 | ||
0da1db75 JR |
614 | static void svm_cpu_uninit(int cpu) |
615 | { | |
0fe1e009 | 616 | struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id()); |
0da1db75 | 617 | |
0fe1e009 | 618 | if (!sd) |
0da1db75 JR |
619 | return; |
620 | ||
621 | per_cpu(svm_data, raw_smp_processor_id()) = NULL; | |
0fe1e009 TH |
622 | __free_page(sd->save_area); |
623 | kfree(sd); | |
0da1db75 JR |
624 | } |
625 | ||
6aa8b732 AK |
626 | static int svm_cpu_init(int cpu) |
627 | { | |
0fe1e009 | 628 | struct svm_cpu_data *sd; |
6aa8b732 AK |
629 | int r; |
630 | ||
0fe1e009 TH |
631 | sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL); |
632 | if (!sd) | |
6aa8b732 | 633 | return -ENOMEM; |
0fe1e009 TH |
634 | sd->cpu = cpu; |
635 | sd->save_area = alloc_page(GFP_KERNEL); | |
6aa8b732 | 636 | r = -ENOMEM; |
0fe1e009 | 637 | if (!sd->save_area) |
6aa8b732 AK |
638 | goto err_1; |
639 | ||
0fe1e009 | 640 | per_cpu(svm_data, cpu) = sd; |
6aa8b732 AK |
641 | |
642 | return 0; | |
643 | ||
644 | err_1: | |
0fe1e009 | 645 | kfree(sd); |
6aa8b732 AK |
646 | return r; |
647 | ||
648 | } | |
649 | ||
ac72a9b7 JR |
650 | static bool valid_msr_intercept(u32 index) |
651 | { | |
652 | int i; | |
653 | ||
654 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) | |
655 | if (direct_access_msrs[i].index == index) | |
656 | return true; | |
657 | ||
658 | return false; | |
659 | } | |
660 | ||
bfc733a7 RR |
661 | static void set_msr_interception(u32 *msrpm, unsigned msr, |
662 | int read, int write) | |
6aa8b732 | 663 | { |
455716fa JR |
664 | u8 bit_read, bit_write; |
665 | unsigned long tmp; | |
666 | u32 offset; | |
6aa8b732 | 667 | |
ac72a9b7 JR |
668 | /* |
669 | * If this warning triggers extend the direct_access_msrs list at the | |
670 | * beginning of the file | |
671 | */ | |
672 | WARN_ON(!valid_msr_intercept(msr)); | |
673 | ||
455716fa JR |
674 | offset = svm_msrpm_offset(msr); |
675 | bit_read = 2 * (msr & 0x0f); | |
676 | bit_write = 2 * (msr & 0x0f) + 1; | |
677 | tmp = msrpm[offset]; | |
678 | ||
679 | BUG_ON(offset == MSR_INVALID); | |
680 | ||
681 | read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp); | |
682 | write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp); | |
683 | ||
684 | msrpm[offset] = tmp; | |
6aa8b732 AK |
685 | } |
686 | ||
f65c229c | 687 | static void svm_vcpu_init_msrpm(u32 *msrpm) |
6aa8b732 AK |
688 | { |
689 | int i; | |
690 | ||
f65c229c JR |
691 | memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); |
692 | ||
ac72a9b7 JR |
693 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { |
694 | if (!direct_access_msrs[i].always) | |
695 | continue; | |
696 | ||
697 | set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1); | |
698 | } | |
f65c229c JR |
699 | } |
700 | ||
323c3d80 JR |
701 | static void add_msr_offset(u32 offset) |
702 | { | |
703 | int i; | |
704 | ||
705 | for (i = 0; i < MSRPM_OFFSETS; ++i) { | |
706 | ||
707 | /* Offset already in list? */ | |
708 | if (msrpm_offsets[i] == offset) | |
bfc733a7 | 709 | return; |
323c3d80 JR |
710 | |
711 | /* Slot used by another offset? */ | |
712 | if (msrpm_offsets[i] != MSR_INVALID) | |
713 | continue; | |
714 | ||
715 | /* Add offset to list */ | |
716 | msrpm_offsets[i] = offset; | |
717 | ||
718 | return; | |
6aa8b732 | 719 | } |
323c3d80 JR |
720 | |
721 | /* | |
722 | * If this BUG triggers the msrpm_offsets table has an overflow. Just | |
723 | * increase MSRPM_OFFSETS in this case. | |
724 | */ | |
bfc733a7 | 725 | BUG(); |
6aa8b732 AK |
726 | } |
727 | ||
323c3d80 | 728 | static void init_msrpm_offsets(void) |
f65c229c | 729 | { |
323c3d80 | 730 | int i; |
f65c229c | 731 | |
323c3d80 JR |
732 | memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets)); |
733 | ||
734 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { | |
735 | u32 offset; | |
736 | ||
737 | offset = svm_msrpm_offset(direct_access_msrs[i].index); | |
738 | BUG_ON(offset == MSR_INVALID); | |
739 | ||
740 | add_msr_offset(offset); | |
741 | } | |
f65c229c JR |
742 | } |
743 | ||
24e09cbf JR |
744 | static void svm_enable_lbrv(struct vcpu_svm *svm) |
745 | { | |
746 | u32 *msrpm = svm->msrpm; | |
747 | ||
748 | svm->vmcb->control.lbr_ctl = 1; | |
749 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1); | |
750 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1); | |
751 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1); | |
752 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1); | |
753 | } | |
754 | ||
755 | static void svm_disable_lbrv(struct vcpu_svm *svm) | |
756 | { | |
757 | u32 *msrpm = svm->msrpm; | |
758 | ||
759 | svm->vmcb->control.lbr_ctl = 0; | |
760 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0); | |
761 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0); | |
762 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0); | |
763 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0); | |
764 | } | |
765 | ||
6aa8b732 AK |
766 | static __init int svm_hardware_setup(void) |
767 | { | |
768 | int cpu; | |
769 | struct page *iopm_pages; | |
f65c229c | 770 | void *iopm_va; |
6aa8b732 AK |
771 | int r; |
772 | ||
6aa8b732 AK |
773 | iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER); |
774 | ||
775 | if (!iopm_pages) | |
776 | return -ENOMEM; | |
c8681339 AL |
777 | |
778 | iopm_va = page_address(iopm_pages); | |
779 | memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); | |
6aa8b732 AK |
780 | iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; |
781 | ||
323c3d80 JR |
782 | init_msrpm_offsets(); |
783 | ||
50a37eb4 JR |
784 | if (boot_cpu_has(X86_FEATURE_NX)) |
785 | kvm_enable_efer_bits(EFER_NX); | |
786 | ||
1b2fd70c AG |
787 | if (boot_cpu_has(X86_FEATURE_FXSR_OPT)) |
788 | kvm_enable_efer_bits(EFER_FFXSR); | |
789 | ||
236de055 AG |
790 | if (nested) { |
791 | printk(KERN_INFO "kvm: Nested Virtualization enabled\n"); | |
eec4b140 | 792 | kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE); |
236de055 AG |
793 | } |
794 | ||
3230bb47 | 795 | for_each_possible_cpu(cpu) { |
6aa8b732 AK |
796 | r = svm_cpu_init(cpu); |
797 | if (r) | |
f65c229c | 798 | goto err; |
6aa8b732 | 799 | } |
33bd6a0b JR |
800 | |
801 | svm_features = cpuid_edx(SVM_CPUID_FUNC); | |
802 | ||
2a6b20b8 | 803 | if (!boot_cpu_has(X86_FEATURE_NPT)) |
e3da3acd JR |
804 | npt_enabled = false; |
805 | ||
6c7dac72 JR |
806 | if (npt_enabled && !npt) { |
807 | printk(KERN_INFO "kvm: Nested Paging disabled\n"); | |
808 | npt_enabled = false; | |
809 | } | |
810 | ||
18552672 | 811 | if (npt_enabled) { |
e3da3acd | 812 | printk(KERN_INFO "kvm: Nested Paging enabled\n"); |
18552672 | 813 | kvm_enable_tdp(); |
5f4cb662 JR |
814 | } else |
815 | kvm_disable_tdp(); | |
e3da3acd | 816 | |
6aa8b732 AK |
817 | return 0; |
818 | ||
f65c229c | 819 | err: |
6aa8b732 AK |
820 | __free_pages(iopm_pages, IOPM_ALLOC_ORDER); |
821 | iopm_base = 0; | |
822 | return r; | |
823 | } | |
824 | ||
825 | static __exit void svm_hardware_unsetup(void) | |
826 | { | |
0da1db75 JR |
827 | int cpu; |
828 | ||
3230bb47 | 829 | for_each_possible_cpu(cpu) |
0da1db75 JR |
830 | svm_cpu_uninit(cpu); |
831 | ||
6aa8b732 | 832 | __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); |
f65c229c | 833 | iopm_base = 0; |
6aa8b732 AK |
834 | } |
835 | ||
836 | static void init_seg(struct vmcb_seg *seg) | |
837 | { | |
838 | seg->selector = 0; | |
839 | seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK | | |
e0231715 | 840 | SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */ |
6aa8b732 AK |
841 | seg->limit = 0xffff; |
842 | seg->base = 0; | |
843 | } | |
844 | ||
845 | static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) | |
846 | { | |
847 | seg->selector = 0; | |
848 | seg->attrib = SVM_SELECTOR_P_MASK | type; | |
849 | seg->limit = 0xffff; | |
850 | seg->base = 0; | |
851 | } | |
852 | ||
f4e1b3c8 ZA |
853 | static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) |
854 | { | |
855 | struct vcpu_svm *svm = to_svm(vcpu); | |
856 | u64 g_tsc_offset = 0; | |
857 | ||
2030753d | 858 | if (is_guest_mode(vcpu)) { |
f4e1b3c8 ZA |
859 | g_tsc_offset = svm->vmcb->control.tsc_offset - |
860 | svm->nested.hsave->control.tsc_offset; | |
861 | svm->nested.hsave->control.tsc_offset = offset; | |
862 | } | |
863 | ||
864 | svm->vmcb->control.tsc_offset = offset + g_tsc_offset; | |
116a0a23 JR |
865 | |
866 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); | |
f4e1b3c8 ZA |
867 | } |
868 | ||
e48672fa ZA |
869 | static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) |
870 | { | |
871 | struct vcpu_svm *svm = to_svm(vcpu); | |
872 | ||
873 | svm->vmcb->control.tsc_offset += adjustment; | |
2030753d | 874 | if (is_guest_mode(vcpu)) |
e48672fa | 875 | svm->nested.hsave->control.tsc_offset += adjustment; |
116a0a23 | 876 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); |
e48672fa ZA |
877 | } |
878 | ||
e6101a96 | 879 | static void init_vmcb(struct vcpu_svm *svm) |
6aa8b732 | 880 | { |
e6101a96 JR |
881 | struct vmcb_control_area *control = &svm->vmcb->control; |
882 | struct vmcb_save_area *save = &svm->vmcb->save; | |
6aa8b732 | 883 | |
bff78274 | 884 | svm->vcpu.fpu_active = 1; |
4ee546b4 | 885 | svm->vcpu.arch.hflags = 0; |
bff78274 | 886 | |
4ee546b4 RJ |
887 | set_cr_intercept(svm, INTERCEPT_CR0_READ); |
888 | set_cr_intercept(svm, INTERCEPT_CR3_READ); | |
889 | set_cr_intercept(svm, INTERCEPT_CR4_READ); | |
890 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
891 | set_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
892 | set_cr_intercept(svm, INTERCEPT_CR4_WRITE); | |
893 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
6aa8b732 | 894 | |
3aed041a JR |
895 | set_dr_intercept(svm, INTERCEPT_DR0_READ); |
896 | set_dr_intercept(svm, INTERCEPT_DR1_READ); | |
897 | set_dr_intercept(svm, INTERCEPT_DR2_READ); | |
898 | set_dr_intercept(svm, INTERCEPT_DR3_READ); | |
899 | set_dr_intercept(svm, INTERCEPT_DR4_READ); | |
900 | set_dr_intercept(svm, INTERCEPT_DR5_READ); | |
901 | set_dr_intercept(svm, INTERCEPT_DR6_READ); | |
902 | set_dr_intercept(svm, INTERCEPT_DR7_READ); | |
903 | ||
904 | set_dr_intercept(svm, INTERCEPT_DR0_WRITE); | |
905 | set_dr_intercept(svm, INTERCEPT_DR1_WRITE); | |
906 | set_dr_intercept(svm, INTERCEPT_DR2_WRITE); | |
907 | set_dr_intercept(svm, INTERCEPT_DR3_WRITE); | |
908 | set_dr_intercept(svm, INTERCEPT_DR4_WRITE); | |
909 | set_dr_intercept(svm, INTERCEPT_DR5_WRITE); | |
910 | set_dr_intercept(svm, INTERCEPT_DR6_WRITE); | |
911 | set_dr_intercept(svm, INTERCEPT_DR7_WRITE); | |
6aa8b732 | 912 | |
18c918c5 JR |
913 | set_exception_intercept(svm, PF_VECTOR); |
914 | set_exception_intercept(svm, UD_VECTOR); | |
915 | set_exception_intercept(svm, MC_VECTOR); | |
6aa8b732 | 916 | |
8a05a1b8 JR |
917 | set_intercept(svm, INTERCEPT_INTR); |
918 | set_intercept(svm, INTERCEPT_NMI); | |
919 | set_intercept(svm, INTERCEPT_SMI); | |
920 | set_intercept(svm, INTERCEPT_SELECTIVE_CR0); | |
921 | set_intercept(svm, INTERCEPT_CPUID); | |
922 | set_intercept(svm, INTERCEPT_INVD); | |
923 | set_intercept(svm, INTERCEPT_HLT); | |
924 | set_intercept(svm, INTERCEPT_INVLPG); | |
925 | set_intercept(svm, INTERCEPT_INVLPGA); | |
926 | set_intercept(svm, INTERCEPT_IOIO_PROT); | |
927 | set_intercept(svm, INTERCEPT_MSR_PROT); | |
928 | set_intercept(svm, INTERCEPT_TASK_SWITCH); | |
929 | set_intercept(svm, INTERCEPT_SHUTDOWN); | |
930 | set_intercept(svm, INTERCEPT_VMRUN); | |
931 | set_intercept(svm, INTERCEPT_VMMCALL); | |
932 | set_intercept(svm, INTERCEPT_VMLOAD); | |
933 | set_intercept(svm, INTERCEPT_VMSAVE); | |
934 | set_intercept(svm, INTERCEPT_STGI); | |
935 | set_intercept(svm, INTERCEPT_CLGI); | |
936 | set_intercept(svm, INTERCEPT_SKINIT); | |
937 | set_intercept(svm, INTERCEPT_WBINVD); | |
938 | set_intercept(svm, INTERCEPT_MONITOR); | |
939 | set_intercept(svm, INTERCEPT_MWAIT); | |
6aa8b732 AK |
940 | |
941 | control->iopm_base_pa = iopm_base; | |
f65c229c | 942 | control->msrpm_base_pa = __pa(svm->msrpm); |
6aa8b732 AK |
943 | control->int_ctl = V_INTR_MASKING_MASK; |
944 | ||
945 | init_seg(&save->es); | |
946 | init_seg(&save->ss); | |
947 | init_seg(&save->ds); | |
948 | init_seg(&save->fs); | |
949 | init_seg(&save->gs); | |
950 | ||
951 | save->cs.selector = 0xf000; | |
952 | /* Executable/Readable Code Segment */ | |
953 | save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK | | |
954 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; | |
955 | save->cs.limit = 0xffff; | |
d92899a0 AK |
956 | /* |
957 | * cs.base should really be 0xffff0000, but vmx can't handle that, so | |
958 | * be consistent with it. | |
959 | * | |
960 | * Replace when we have real mode working for vmx. | |
961 | */ | |
962 | save->cs.base = 0xf0000; | |
6aa8b732 AK |
963 | |
964 | save->gdtr.limit = 0xffff; | |
965 | save->idtr.limit = 0xffff; | |
966 | ||
967 | init_sys_seg(&save->ldtr, SEG_TYPE_LDT); | |
968 | init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16); | |
969 | ||
eaa48512 | 970 | svm_set_efer(&svm->vcpu, 0); |
d77c26fc | 971 | save->dr6 = 0xffff0ff0; |
6aa8b732 AK |
972 | save->dr7 = 0x400; |
973 | save->rflags = 2; | |
974 | save->rip = 0x0000fff0; | |
5fdbf976 | 975 | svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip; |
6aa8b732 | 976 | |
e0231715 JR |
977 | /* |
978 | * This is the guest-visible cr0 value. | |
18fa000a | 979 | * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0. |
6aa8b732 | 980 | */ |
678041ad MT |
981 | svm->vcpu.arch.cr0 = 0; |
982 | (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET); | |
18fa000a | 983 | |
66aee91a | 984 | save->cr4 = X86_CR4_PAE; |
6aa8b732 | 985 | /* rdx = ?? */ |
709ddebf JR |
986 | |
987 | if (npt_enabled) { | |
988 | /* Setup VMCB for Nested Paging */ | |
989 | control->nested_ctl = 1; | |
8a05a1b8 JR |
990 | clr_intercept(svm, INTERCEPT_TASK_SWITCH); |
991 | clr_intercept(svm, INTERCEPT_INVLPG); | |
18c918c5 | 992 | clr_exception_intercept(svm, PF_VECTOR); |
4ee546b4 RJ |
993 | clr_cr_intercept(svm, INTERCEPT_CR3_READ); |
994 | clr_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
709ddebf | 995 | save->g_pat = 0x0007040600070406ULL; |
709ddebf JR |
996 | save->cr3 = 0; |
997 | save->cr4 = 0; | |
998 | } | |
a79d2f18 | 999 | force_new_asid(&svm->vcpu); |
1371d904 | 1000 | |
e6aa9abd | 1001 | svm->nested.vmcb = 0; |
2af9194d JR |
1002 | svm->vcpu.arch.hflags = 0; |
1003 | ||
2a6b20b8 | 1004 | if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) { |
565d0998 | 1005 | control->pause_filter_count = 3000; |
8a05a1b8 | 1006 | set_intercept(svm, INTERCEPT_PAUSE); |
565d0998 ML |
1007 | } |
1008 | ||
8d28fec4 RJ |
1009 | mark_all_dirty(svm->vmcb); |
1010 | ||
2af9194d | 1011 | enable_gif(svm); |
6aa8b732 AK |
1012 | } |
1013 | ||
e00c8cf2 | 1014 | static int svm_vcpu_reset(struct kvm_vcpu *vcpu) |
04d2cc77 AK |
1015 | { |
1016 | struct vcpu_svm *svm = to_svm(vcpu); | |
1017 | ||
e6101a96 | 1018 | init_vmcb(svm); |
70433389 | 1019 | |
c5af89b6 | 1020 | if (!kvm_vcpu_is_bsp(vcpu)) { |
5fdbf976 | 1021 | kvm_rip_write(vcpu, 0); |
ad312c7c ZX |
1022 | svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12; |
1023 | svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8; | |
70433389 | 1024 | } |
5fdbf976 MT |
1025 | vcpu->arch.regs_avail = ~0; |
1026 | vcpu->arch.regs_dirty = ~0; | |
e00c8cf2 AK |
1027 | |
1028 | return 0; | |
04d2cc77 AK |
1029 | } |
1030 | ||
fb3f0f51 | 1031 | static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) |
6aa8b732 | 1032 | { |
a2fa3e9f | 1033 | struct vcpu_svm *svm; |
6aa8b732 | 1034 | struct page *page; |
f65c229c | 1035 | struct page *msrpm_pages; |
b286d5d8 | 1036 | struct page *hsave_page; |
3d6368ef | 1037 | struct page *nested_msrpm_pages; |
fb3f0f51 | 1038 | int err; |
6aa8b732 | 1039 | |
c16f862d | 1040 | svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
fb3f0f51 RR |
1041 | if (!svm) { |
1042 | err = -ENOMEM; | |
1043 | goto out; | |
1044 | } | |
1045 | ||
1046 | err = kvm_vcpu_init(&svm->vcpu, kvm, id); | |
1047 | if (err) | |
1048 | goto free_svm; | |
1049 | ||
b7af4043 | 1050 | err = -ENOMEM; |
6aa8b732 | 1051 | page = alloc_page(GFP_KERNEL); |
b7af4043 | 1052 | if (!page) |
fb3f0f51 | 1053 | goto uninit; |
6aa8b732 | 1054 | |
f65c229c JR |
1055 | msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); |
1056 | if (!msrpm_pages) | |
b7af4043 | 1057 | goto free_page1; |
3d6368ef AG |
1058 | |
1059 | nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
1060 | if (!nested_msrpm_pages) | |
b7af4043 | 1061 | goto free_page2; |
f65c229c | 1062 | |
b286d5d8 AG |
1063 | hsave_page = alloc_page(GFP_KERNEL); |
1064 | if (!hsave_page) | |
b7af4043 TY |
1065 | goto free_page3; |
1066 | ||
e6aa9abd | 1067 | svm->nested.hsave = page_address(hsave_page); |
b286d5d8 | 1068 | |
b7af4043 TY |
1069 | svm->msrpm = page_address(msrpm_pages); |
1070 | svm_vcpu_init_msrpm(svm->msrpm); | |
1071 | ||
e6aa9abd | 1072 | svm->nested.msrpm = page_address(nested_msrpm_pages); |
323c3d80 | 1073 | svm_vcpu_init_msrpm(svm->nested.msrpm); |
3d6368ef | 1074 | |
a2fa3e9f GH |
1075 | svm->vmcb = page_address(page); |
1076 | clear_page(svm->vmcb); | |
1077 | svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT; | |
1078 | svm->asid_generation = 0; | |
e6101a96 | 1079 | init_vmcb(svm); |
99e3e30a | 1080 | kvm_write_tsc(&svm->vcpu, 0); |
a2fa3e9f | 1081 | |
10ab25cd JK |
1082 | err = fx_init(&svm->vcpu); |
1083 | if (err) | |
1084 | goto free_page4; | |
1085 | ||
ad312c7c | 1086 | svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; |
c5af89b6 | 1087 | if (kvm_vcpu_is_bsp(&svm->vcpu)) |
ad312c7c | 1088 | svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; |
6aa8b732 | 1089 | |
fb3f0f51 | 1090 | return &svm->vcpu; |
36241b8c | 1091 | |
10ab25cd JK |
1092 | free_page4: |
1093 | __free_page(hsave_page); | |
b7af4043 TY |
1094 | free_page3: |
1095 | __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER); | |
1096 | free_page2: | |
1097 | __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); | |
1098 | free_page1: | |
1099 | __free_page(page); | |
fb3f0f51 RR |
1100 | uninit: |
1101 | kvm_vcpu_uninit(&svm->vcpu); | |
1102 | free_svm: | |
a4770347 | 1103 | kmem_cache_free(kvm_vcpu_cache, svm); |
fb3f0f51 RR |
1104 | out: |
1105 | return ERR_PTR(err); | |
6aa8b732 AK |
1106 | } |
1107 | ||
1108 | static void svm_free_vcpu(struct kvm_vcpu *vcpu) | |
1109 | { | |
a2fa3e9f GH |
1110 | struct vcpu_svm *svm = to_svm(vcpu); |
1111 | ||
fb3f0f51 | 1112 | __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT)); |
f65c229c | 1113 | __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER); |
e6aa9abd JR |
1114 | __free_page(virt_to_page(svm->nested.hsave)); |
1115 | __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER); | |
fb3f0f51 | 1116 | kvm_vcpu_uninit(vcpu); |
a4770347 | 1117 | kmem_cache_free(kvm_vcpu_cache, svm); |
6aa8b732 AK |
1118 | } |
1119 | ||
15ad7146 | 1120 | static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
6aa8b732 | 1121 | { |
a2fa3e9f | 1122 | struct vcpu_svm *svm = to_svm(vcpu); |
15ad7146 | 1123 | int i; |
0cc5064d | 1124 | |
0cc5064d | 1125 | if (unlikely(cpu != vcpu->cpu)) { |
4b656b12 | 1126 | svm->asid_generation = 0; |
8d28fec4 | 1127 | mark_all_dirty(svm->vmcb); |
0cc5064d | 1128 | } |
94dfbdb3 | 1129 | |
82ca2d10 AK |
1130 | #ifdef CONFIG_X86_64 |
1131 | rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base); | |
1132 | #endif | |
dacccfdd AK |
1133 | savesegment(fs, svm->host.fs); |
1134 | savesegment(gs, svm->host.gs); | |
1135 | svm->host.ldt = kvm_read_ldt(); | |
1136 | ||
94dfbdb3 | 1137 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 1138 | rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
6aa8b732 AK |
1139 | } |
1140 | ||
1141 | static void svm_vcpu_put(struct kvm_vcpu *vcpu) | |
1142 | { | |
a2fa3e9f | 1143 | struct vcpu_svm *svm = to_svm(vcpu); |
94dfbdb3 AL |
1144 | int i; |
1145 | ||
e1beb1d3 | 1146 | ++vcpu->stat.host_state_reload; |
dacccfdd AK |
1147 | kvm_load_ldt(svm->host.ldt); |
1148 | #ifdef CONFIG_X86_64 | |
1149 | loadsegment(fs, svm->host.fs); | |
1150 | load_gs_index(svm->host.gs); | |
1151 | wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs); | |
1152 | #else | |
1153 | loadsegment(gs, svm->host.gs); | |
1154 | #endif | |
94dfbdb3 | 1155 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) |
a2fa3e9f | 1156 | wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); |
6aa8b732 AK |
1157 | } |
1158 | ||
6aa8b732 AK |
1159 | static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu) |
1160 | { | |
a2fa3e9f | 1161 | return to_svm(vcpu)->vmcb->save.rflags; |
6aa8b732 AK |
1162 | } |
1163 | ||
1164 | static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
1165 | { | |
a2fa3e9f | 1166 | to_svm(vcpu)->vmcb->save.rflags = rflags; |
6aa8b732 AK |
1167 | } |
1168 | ||
6de4f3ad AK |
1169 | static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) |
1170 | { | |
1171 | switch (reg) { | |
1172 | case VCPU_EXREG_PDPTR: | |
1173 | BUG_ON(!npt_enabled); | |
ff03a073 | 1174 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3); |
6de4f3ad AK |
1175 | break; |
1176 | default: | |
1177 | BUG(); | |
1178 | } | |
1179 | } | |
1180 | ||
f0b85051 AG |
1181 | static void svm_set_vintr(struct vcpu_svm *svm) |
1182 | { | |
8a05a1b8 | 1183 | set_intercept(svm, INTERCEPT_VINTR); |
f0b85051 AG |
1184 | } |
1185 | ||
1186 | static void svm_clear_vintr(struct vcpu_svm *svm) | |
1187 | { | |
8a05a1b8 | 1188 | clr_intercept(svm, INTERCEPT_VINTR); |
f0b85051 AG |
1189 | } |
1190 | ||
6aa8b732 AK |
1191 | static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg) |
1192 | { | |
a2fa3e9f | 1193 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; |
6aa8b732 AK |
1194 | |
1195 | switch (seg) { | |
1196 | case VCPU_SREG_CS: return &save->cs; | |
1197 | case VCPU_SREG_DS: return &save->ds; | |
1198 | case VCPU_SREG_ES: return &save->es; | |
1199 | case VCPU_SREG_FS: return &save->fs; | |
1200 | case VCPU_SREG_GS: return &save->gs; | |
1201 | case VCPU_SREG_SS: return &save->ss; | |
1202 | case VCPU_SREG_TR: return &save->tr; | |
1203 | case VCPU_SREG_LDTR: return &save->ldtr; | |
1204 | } | |
1205 | BUG(); | |
8b6d44c7 | 1206 | return NULL; |
6aa8b732 AK |
1207 | } |
1208 | ||
1209 | static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1210 | { | |
1211 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1212 | ||
1213 | return s->base; | |
1214 | } | |
1215 | ||
1216 | static void svm_get_segment(struct kvm_vcpu *vcpu, | |
1217 | struct kvm_segment *var, int seg) | |
1218 | { | |
1219 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1220 | ||
1221 | var->base = s->base; | |
1222 | var->limit = s->limit; | |
1223 | var->selector = s->selector; | |
1224 | var->type = s->attrib & SVM_SELECTOR_TYPE_MASK; | |
1225 | var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1; | |
1226 | var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
1227 | var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1; | |
1228 | var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1; | |
1229 | var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; | |
1230 | var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; | |
1231 | var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1; | |
25022acc | 1232 | |
e0231715 JR |
1233 | /* |
1234 | * AMD's VMCB does not have an explicit unusable field, so emulate it | |
19bca6ab AP |
1235 | * for cross vendor migration purposes by "not present" |
1236 | */ | |
1237 | var->unusable = !var->present || (var->type == 0); | |
1238 | ||
1fbdc7a5 AP |
1239 | switch (seg) { |
1240 | case VCPU_SREG_CS: | |
1241 | /* | |
1242 | * SVM always stores 0 for the 'G' bit in the CS selector in | |
1243 | * the VMCB on a VMEXIT. This hurts cross-vendor migration: | |
1244 | * Intel's VMENTRY has a check on the 'G' bit. | |
1245 | */ | |
25022acc | 1246 | var->g = s->limit > 0xfffff; |
1fbdc7a5 AP |
1247 | break; |
1248 | case VCPU_SREG_TR: | |
1249 | /* | |
1250 | * Work around a bug where the busy flag in the tr selector | |
1251 | * isn't exposed | |
1252 | */ | |
c0d09828 | 1253 | var->type |= 0x2; |
1fbdc7a5 AP |
1254 | break; |
1255 | case VCPU_SREG_DS: | |
1256 | case VCPU_SREG_ES: | |
1257 | case VCPU_SREG_FS: | |
1258 | case VCPU_SREG_GS: | |
1259 | /* | |
1260 | * The accessed bit must always be set in the segment | |
1261 | * descriptor cache, although it can be cleared in the | |
1262 | * descriptor, the cached bit always remains at 1. Since | |
1263 | * Intel has a check on this, set it here to support | |
1264 | * cross-vendor migration. | |
1265 | */ | |
1266 | if (!var->unusable) | |
1267 | var->type |= 0x1; | |
1268 | break; | |
b586eb02 | 1269 | case VCPU_SREG_SS: |
e0231715 JR |
1270 | /* |
1271 | * On AMD CPUs sometimes the DB bit in the segment | |
b586eb02 AP |
1272 | * descriptor is left as 1, although the whole segment has |
1273 | * been made unusable. Clear it here to pass an Intel VMX | |
1274 | * entry check when cross vendor migrating. | |
1275 | */ | |
1276 | if (var->unusable) | |
1277 | var->db = 0; | |
1278 | break; | |
1fbdc7a5 | 1279 | } |
6aa8b732 AK |
1280 | } |
1281 | ||
2e4d2653 IE |
1282 | static int svm_get_cpl(struct kvm_vcpu *vcpu) |
1283 | { | |
1284 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; | |
1285 | ||
1286 | return save->cpl; | |
1287 | } | |
1288 | ||
89a27f4d | 1289 | static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1290 | { |
a2fa3e9f GH |
1291 | struct vcpu_svm *svm = to_svm(vcpu); |
1292 | ||
89a27f4d GN |
1293 | dt->size = svm->vmcb->save.idtr.limit; |
1294 | dt->address = svm->vmcb->save.idtr.base; | |
6aa8b732 AK |
1295 | } |
1296 | ||
89a27f4d | 1297 | static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1298 | { |
a2fa3e9f GH |
1299 | struct vcpu_svm *svm = to_svm(vcpu); |
1300 | ||
89a27f4d GN |
1301 | svm->vmcb->save.idtr.limit = dt->size; |
1302 | svm->vmcb->save.idtr.base = dt->address ; | |
6aa8b732 AK |
1303 | } |
1304 | ||
89a27f4d | 1305 | static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1306 | { |
a2fa3e9f GH |
1307 | struct vcpu_svm *svm = to_svm(vcpu); |
1308 | ||
89a27f4d GN |
1309 | dt->size = svm->vmcb->save.gdtr.limit; |
1310 | dt->address = svm->vmcb->save.gdtr.base; | |
6aa8b732 AK |
1311 | } |
1312 | ||
89a27f4d | 1313 | static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) |
6aa8b732 | 1314 | { |
a2fa3e9f GH |
1315 | struct vcpu_svm *svm = to_svm(vcpu); |
1316 | ||
89a27f4d GN |
1317 | svm->vmcb->save.gdtr.limit = dt->size; |
1318 | svm->vmcb->save.gdtr.base = dt->address ; | |
6aa8b732 AK |
1319 | } |
1320 | ||
e8467fda AK |
1321 | static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) |
1322 | { | |
1323 | } | |
1324 | ||
25c4c276 | 1325 | static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) |
399badf3 AK |
1326 | { |
1327 | } | |
1328 | ||
d225157b AK |
1329 | static void update_cr0_intercept(struct vcpu_svm *svm) |
1330 | { | |
1331 | ulong gcr0 = svm->vcpu.arch.cr0; | |
1332 | u64 *hcr0 = &svm->vmcb->save.cr0; | |
1333 | ||
1334 | if (!svm->vcpu.fpu_active) | |
1335 | *hcr0 |= SVM_CR0_SELECTIVE_MASK; | |
1336 | else | |
1337 | *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK) | |
1338 | | (gcr0 & SVM_CR0_SELECTIVE_MASK); | |
1339 | ||
1340 | ||
1341 | if (gcr0 == *hcr0 && svm->vcpu.fpu_active) { | |
4ee546b4 RJ |
1342 | clr_cr_intercept(svm, INTERCEPT_CR0_READ); |
1343 | clr_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
d225157b | 1344 | } else { |
4ee546b4 RJ |
1345 | set_cr_intercept(svm, INTERCEPT_CR0_READ); |
1346 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
d225157b AK |
1347 | } |
1348 | } | |
1349 | ||
6aa8b732 AK |
1350 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
1351 | { | |
a2fa3e9f GH |
1352 | struct vcpu_svm *svm = to_svm(vcpu); |
1353 | ||
2030753d | 1354 | if (is_guest_mode(vcpu)) { |
7f5d8b56 JR |
1355 | /* |
1356 | * We are here because we run in nested mode, the host kvm | |
1357 | * intercepts cr0 writes but the l1 hypervisor does not. | |
1358 | * But the L1 hypervisor may intercept selective cr0 writes. | |
1359 | * This needs to be checked here. | |
1360 | */ | |
1361 | unsigned long old, new; | |
1362 | ||
1363 | /* Remove bits that would trigger a real cr0 write intercept */ | |
1364 | old = vcpu->arch.cr0 & SVM_CR0_SELECTIVE_MASK; | |
1365 | new = cr0 & SVM_CR0_SELECTIVE_MASK; | |
1366 | ||
1367 | if (old == new) { | |
1368 | /* cr0 write with ts and mp unchanged */ | |
1369 | svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE; | |
cda00082 JR |
1370 | if (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE) { |
1371 | svm->nested.vmexit_rip = kvm_rip_read(vcpu); | |
1372 | svm->nested.vmexit_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
1373 | svm->nested.vmexit_rax = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
7f5d8b56 | 1374 | return; |
cda00082 | 1375 | } |
7f5d8b56 JR |
1376 | } |
1377 | } | |
1378 | ||
05b3e0c2 | 1379 | #ifdef CONFIG_X86_64 |
f6801dff | 1380 | if (vcpu->arch.efer & EFER_LME) { |
707d92fa | 1381 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
f6801dff | 1382 | vcpu->arch.efer |= EFER_LMA; |
2b5203ee | 1383 | svm->vmcb->save.efer |= EFER_LMA | EFER_LME; |
6aa8b732 AK |
1384 | } |
1385 | ||
d77c26fc | 1386 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) { |
f6801dff | 1387 | vcpu->arch.efer &= ~EFER_LMA; |
2b5203ee | 1388 | svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME); |
6aa8b732 AK |
1389 | } |
1390 | } | |
1391 | #endif | |
ad312c7c | 1392 | vcpu->arch.cr0 = cr0; |
888f9f3e AK |
1393 | |
1394 | if (!npt_enabled) | |
1395 | cr0 |= X86_CR0_PG | X86_CR0_WP; | |
02daab21 AK |
1396 | |
1397 | if (!vcpu->fpu_active) | |
334df50a | 1398 | cr0 |= X86_CR0_TS; |
709ddebf JR |
1399 | /* |
1400 | * re-enable caching here because the QEMU bios | |
1401 | * does not do it - this results in some delay at | |
1402 | * reboot | |
1403 | */ | |
1404 | cr0 &= ~(X86_CR0_CD | X86_CR0_NW); | |
a2fa3e9f | 1405 | svm->vmcb->save.cr0 = cr0; |
d225157b | 1406 | update_cr0_intercept(svm); |
6aa8b732 AK |
1407 | } |
1408 | ||
1409 | static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1410 | { | |
6394b649 | 1411 | unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE; |
e5eab0ce JR |
1412 | unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4; |
1413 | ||
1414 | if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) | |
1415 | force_new_asid(vcpu); | |
6394b649 | 1416 | |
ec077263 JR |
1417 | vcpu->arch.cr4 = cr4; |
1418 | if (!npt_enabled) | |
1419 | cr4 |= X86_CR4_PAE; | |
6394b649 | 1420 | cr4 |= host_cr4_mce; |
ec077263 | 1421 | to_svm(vcpu)->vmcb->save.cr4 = cr4; |
6aa8b732 AK |
1422 | } |
1423 | ||
1424 | static void svm_set_segment(struct kvm_vcpu *vcpu, | |
1425 | struct kvm_segment *var, int seg) | |
1426 | { | |
a2fa3e9f | 1427 | struct vcpu_svm *svm = to_svm(vcpu); |
6aa8b732 AK |
1428 | struct vmcb_seg *s = svm_seg(vcpu, seg); |
1429 | ||
1430 | s->base = var->base; | |
1431 | s->limit = var->limit; | |
1432 | s->selector = var->selector; | |
1433 | if (var->unusable) | |
1434 | s->attrib = 0; | |
1435 | else { | |
1436 | s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK); | |
1437 | s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT; | |
1438 | s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT; | |
1439 | s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT; | |
1440 | s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT; | |
1441 | s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT; | |
1442 | s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT; | |
1443 | s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT; | |
1444 | } | |
1445 | if (seg == VCPU_SREG_CS) | |
a2fa3e9f GH |
1446 | svm->vmcb->save.cpl |
1447 | = (svm->vmcb->save.cs.attrib | |
6aa8b732 AK |
1448 | >> SVM_SELECTOR_DPL_SHIFT) & 3; |
1449 | ||
1450 | } | |
1451 | ||
44c11430 | 1452 | static void update_db_intercept(struct kvm_vcpu *vcpu) |
6aa8b732 | 1453 | { |
d0bfb940 JK |
1454 | struct vcpu_svm *svm = to_svm(vcpu); |
1455 | ||
18c918c5 JR |
1456 | clr_exception_intercept(svm, DB_VECTOR); |
1457 | clr_exception_intercept(svm, BP_VECTOR); | |
44c11430 | 1458 | |
6be7d306 | 1459 | if (svm->nmi_singlestep) |
18c918c5 | 1460 | set_exception_intercept(svm, DB_VECTOR); |
44c11430 | 1461 | |
d0bfb940 JK |
1462 | if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) { |
1463 | if (vcpu->guest_debug & | |
1464 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
18c918c5 | 1465 | set_exception_intercept(svm, DB_VECTOR); |
d0bfb940 | 1466 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) |
18c918c5 | 1467 | set_exception_intercept(svm, BP_VECTOR); |
d0bfb940 JK |
1468 | } else |
1469 | vcpu->guest_debug = 0; | |
44c11430 GN |
1470 | } |
1471 | ||
355be0b9 | 1472 | static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) |
44c11430 | 1473 | { |
44c11430 GN |
1474 | struct vcpu_svm *svm = to_svm(vcpu); |
1475 | ||
ae675ef0 JK |
1476 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) |
1477 | svm->vmcb->save.dr7 = dbg->arch.debugreg[7]; | |
1478 | else | |
1479 | svm->vmcb->save.dr7 = vcpu->arch.dr7; | |
1480 | ||
355be0b9 | 1481 | update_db_intercept(vcpu); |
6aa8b732 AK |
1482 | } |
1483 | ||
0fe1e009 | 1484 | static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) |
6aa8b732 | 1485 | { |
0fe1e009 TH |
1486 | if (sd->next_asid > sd->max_asid) { |
1487 | ++sd->asid_generation; | |
1488 | sd->next_asid = 1; | |
a2fa3e9f | 1489 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; |
6aa8b732 AK |
1490 | } |
1491 | ||
0fe1e009 TH |
1492 | svm->asid_generation = sd->asid_generation; |
1493 | svm->vmcb->control.asid = sd->next_asid++; | |
d48086d1 JR |
1494 | |
1495 | mark_dirty(svm->vmcb, VMCB_ASID); | |
6aa8b732 AK |
1496 | } |
1497 | ||
020df079 | 1498 | static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value) |
6aa8b732 | 1499 | { |
42dbaa5a | 1500 | struct vcpu_svm *svm = to_svm(vcpu); |
42dbaa5a | 1501 | |
020df079 | 1502 | svm->vmcb->save.dr7 = value; |
6aa8b732 AK |
1503 | } |
1504 | ||
851ba692 | 1505 | static int pf_interception(struct vcpu_svm *svm) |
6aa8b732 | 1506 | { |
631bc487 | 1507 | u64 fault_address = svm->vmcb->control.exit_info_2; |
6aa8b732 | 1508 | u32 error_code; |
631bc487 | 1509 | int r = 1; |
6aa8b732 | 1510 | |
631bc487 GN |
1511 | switch (svm->apf_reason) { |
1512 | default: | |
1513 | error_code = svm->vmcb->control.exit_info_1; | |
af9ca2d7 | 1514 | |
631bc487 GN |
1515 | trace_kvm_page_fault(fault_address, error_code); |
1516 | if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu)) | |
1517 | kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address); | |
1518 | r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code); | |
1519 | break; | |
1520 | case KVM_PV_REASON_PAGE_NOT_PRESENT: | |
1521 | svm->apf_reason = 0; | |
1522 | local_irq_disable(); | |
1523 | kvm_async_pf_task_wait(fault_address); | |
1524 | local_irq_enable(); | |
1525 | break; | |
1526 | case KVM_PV_REASON_PAGE_READY: | |
1527 | svm->apf_reason = 0; | |
1528 | local_irq_disable(); | |
1529 | kvm_async_pf_task_wake(fault_address); | |
1530 | local_irq_enable(); | |
1531 | break; | |
1532 | } | |
1533 | return r; | |
6aa8b732 AK |
1534 | } |
1535 | ||
851ba692 | 1536 | static int db_interception(struct vcpu_svm *svm) |
d0bfb940 | 1537 | { |
851ba692 AK |
1538 | struct kvm_run *kvm_run = svm->vcpu.run; |
1539 | ||
d0bfb940 | 1540 | if (!(svm->vcpu.guest_debug & |
44c11430 | 1541 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) && |
6be7d306 | 1542 | !svm->nmi_singlestep) { |
d0bfb940 JK |
1543 | kvm_queue_exception(&svm->vcpu, DB_VECTOR); |
1544 | return 1; | |
1545 | } | |
44c11430 | 1546 | |
6be7d306 JK |
1547 | if (svm->nmi_singlestep) { |
1548 | svm->nmi_singlestep = false; | |
44c11430 GN |
1549 | if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) |
1550 | svm->vmcb->save.rflags &= | |
1551 | ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1552 | update_db_intercept(&svm->vcpu); | |
1553 | } | |
1554 | ||
1555 | if (svm->vcpu.guest_debug & | |
e0231715 | 1556 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) { |
44c11430 GN |
1557 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
1558 | kvm_run->debug.arch.pc = | |
1559 | svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1560 | kvm_run->debug.arch.exception = DB_VECTOR; | |
1561 | return 0; | |
1562 | } | |
1563 | ||
1564 | return 1; | |
d0bfb940 JK |
1565 | } |
1566 | ||
851ba692 | 1567 | static int bp_interception(struct vcpu_svm *svm) |
d0bfb940 | 1568 | { |
851ba692 AK |
1569 | struct kvm_run *kvm_run = svm->vcpu.run; |
1570 | ||
d0bfb940 JK |
1571 | kvm_run->exit_reason = KVM_EXIT_DEBUG; |
1572 | kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1573 | kvm_run->debug.arch.exception = BP_VECTOR; | |
1574 | return 0; | |
1575 | } | |
1576 | ||
851ba692 | 1577 | static int ud_interception(struct vcpu_svm *svm) |
7aa81cc0 AL |
1578 | { |
1579 | int er; | |
1580 | ||
851ba692 | 1581 | er = emulate_instruction(&svm->vcpu, 0, 0, EMULTYPE_TRAP_UD); |
7aa81cc0 | 1582 | if (er != EMULATE_DONE) |
7ee5d940 | 1583 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
7aa81cc0 AL |
1584 | return 1; |
1585 | } | |
1586 | ||
6b52d186 | 1587 | static void svm_fpu_activate(struct kvm_vcpu *vcpu) |
7807fa6c | 1588 | { |
6b52d186 | 1589 | struct vcpu_svm *svm = to_svm(vcpu); |
66a562f7 | 1590 | |
18c918c5 | 1591 | clr_exception_intercept(svm, NM_VECTOR); |
66a562f7 | 1592 | |
e756fc62 | 1593 | svm->vcpu.fpu_active = 1; |
d225157b | 1594 | update_cr0_intercept(svm); |
6b52d186 | 1595 | } |
a2fa3e9f | 1596 | |
6b52d186 AK |
1597 | static int nm_interception(struct vcpu_svm *svm) |
1598 | { | |
1599 | svm_fpu_activate(&svm->vcpu); | |
a2fa3e9f | 1600 | return 1; |
7807fa6c AL |
1601 | } |
1602 | ||
67ec6607 JR |
1603 | static bool is_erratum_383(void) |
1604 | { | |
1605 | int err, i; | |
1606 | u64 value; | |
1607 | ||
1608 | if (!erratum_383_found) | |
1609 | return false; | |
1610 | ||
1611 | value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err); | |
1612 | if (err) | |
1613 | return false; | |
1614 | ||
1615 | /* Bit 62 may or may not be set for this mce */ | |
1616 | value &= ~(1ULL << 62); | |
1617 | ||
1618 | if (value != 0xb600000000010015ULL) | |
1619 | return false; | |
1620 | ||
1621 | /* Clear MCi_STATUS registers */ | |
1622 | for (i = 0; i < 6; ++i) | |
1623 | native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0); | |
1624 | ||
1625 | value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err); | |
1626 | if (!err) { | |
1627 | u32 low, high; | |
1628 | ||
1629 | value &= ~(1ULL << 2); | |
1630 | low = lower_32_bits(value); | |
1631 | high = upper_32_bits(value); | |
1632 | ||
1633 | native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high); | |
1634 | } | |
1635 | ||
1636 | /* Flush tlb to evict multi-match entries */ | |
1637 | __flush_tlb_all(); | |
1638 | ||
1639 | return true; | |
1640 | } | |
1641 | ||
fe5913e4 | 1642 | static void svm_handle_mce(struct vcpu_svm *svm) |
53371b50 | 1643 | { |
67ec6607 JR |
1644 | if (is_erratum_383()) { |
1645 | /* | |
1646 | * Erratum 383 triggered. Guest state is corrupt so kill the | |
1647 | * guest. | |
1648 | */ | |
1649 | pr_err("KVM: Guest triggered AMD Erratum 383\n"); | |
1650 | ||
a8eeb04a | 1651 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu); |
67ec6607 JR |
1652 | |
1653 | return; | |
1654 | } | |
1655 | ||
53371b50 JR |
1656 | /* |
1657 | * On an #MC intercept the MCE handler is not called automatically in | |
1658 | * the host. So do it by hand here. | |
1659 | */ | |
1660 | asm volatile ( | |
1661 | "int $0x12\n"); | |
1662 | /* not sure if we ever come back to this point */ | |
1663 | ||
fe5913e4 JR |
1664 | return; |
1665 | } | |
1666 | ||
1667 | static int mc_interception(struct vcpu_svm *svm) | |
1668 | { | |
53371b50 JR |
1669 | return 1; |
1670 | } | |
1671 | ||
851ba692 | 1672 | static int shutdown_interception(struct vcpu_svm *svm) |
46fe4ddd | 1673 | { |
851ba692 AK |
1674 | struct kvm_run *kvm_run = svm->vcpu.run; |
1675 | ||
46fe4ddd JR |
1676 | /* |
1677 | * VMCB is undefined after a SHUTDOWN intercept | |
1678 | * so reinitialize it. | |
1679 | */ | |
a2fa3e9f | 1680 | clear_page(svm->vmcb); |
e6101a96 | 1681 | init_vmcb(svm); |
46fe4ddd JR |
1682 | |
1683 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
1684 | return 0; | |
1685 | } | |
1686 | ||
851ba692 | 1687 | static int io_interception(struct vcpu_svm *svm) |
6aa8b732 | 1688 | { |
cf8f70bf | 1689 | struct kvm_vcpu *vcpu = &svm->vcpu; |
d77c26fc | 1690 | u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */ |
34c33d16 | 1691 | int size, in, string; |
039576c0 | 1692 | unsigned port; |
6aa8b732 | 1693 | |
e756fc62 | 1694 | ++svm->vcpu.stat.io_exits; |
e70669ab | 1695 | string = (io_info & SVM_IOIO_STR_MASK) != 0; |
039576c0 | 1696 | in = (io_info & SVM_IOIO_TYPE_MASK) != 0; |
cf8f70bf | 1697 | if (string || in) |
6d77dbfc | 1698 | return emulate_instruction(vcpu, 0, 0, 0) == EMULATE_DONE; |
cf8f70bf | 1699 | |
039576c0 AK |
1700 | port = io_info >> 16; |
1701 | size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT; | |
cf8f70bf | 1702 | svm->next_rip = svm->vmcb->control.exit_info_2; |
e93f36bc | 1703 | skip_emulated_instruction(&svm->vcpu); |
cf8f70bf GN |
1704 | |
1705 | return kvm_fast_pio_out(vcpu, size, port); | |
6aa8b732 AK |
1706 | } |
1707 | ||
851ba692 | 1708 | static int nmi_interception(struct vcpu_svm *svm) |
c47f098d JR |
1709 | { |
1710 | return 1; | |
1711 | } | |
1712 | ||
851ba692 | 1713 | static int intr_interception(struct vcpu_svm *svm) |
a0698055 JR |
1714 | { |
1715 | ++svm->vcpu.stat.irq_exits; | |
1716 | return 1; | |
1717 | } | |
1718 | ||
851ba692 | 1719 | static int nop_on_interception(struct vcpu_svm *svm) |
6aa8b732 AK |
1720 | { |
1721 | return 1; | |
1722 | } | |
1723 | ||
851ba692 | 1724 | static int halt_interception(struct vcpu_svm *svm) |
6aa8b732 | 1725 | { |
5fdbf976 | 1726 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 1; |
e756fc62 RR |
1727 | skip_emulated_instruction(&svm->vcpu); |
1728 | return kvm_emulate_halt(&svm->vcpu); | |
6aa8b732 AK |
1729 | } |
1730 | ||
851ba692 | 1731 | static int vmmcall_interception(struct vcpu_svm *svm) |
02e235bc | 1732 | { |
5fdbf976 | 1733 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; |
e756fc62 | 1734 | skip_emulated_instruction(&svm->vcpu); |
7aa81cc0 AL |
1735 | kvm_emulate_hypercall(&svm->vcpu); |
1736 | return 1; | |
02e235bc AK |
1737 | } |
1738 | ||
5bd2edc3 JR |
1739 | static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu) |
1740 | { | |
1741 | struct vcpu_svm *svm = to_svm(vcpu); | |
1742 | ||
1743 | return svm->nested.nested_cr3; | |
1744 | } | |
1745 | ||
1746 | static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu, | |
1747 | unsigned long root) | |
1748 | { | |
1749 | struct vcpu_svm *svm = to_svm(vcpu); | |
1750 | ||
1751 | svm->vmcb->control.nested_cr3 = root; | |
1752 | force_new_asid(vcpu); | |
1753 | } | |
1754 | ||
6389ee94 AK |
1755 | static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, |
1756 | struct x86_exception *fault) | |
5bd2edc3 JR |
1757 | { |
1758 | struct vcpu_svm *svm = to_svm(vcpu); | |
1759 | ||
1760 | svm->vmcb->control.exit_code = SVM_EXIT_NPF; | |
1761 | svm->vmcb->control.exit_code_hi = 0; | |
6389ee94 AK |
1762 | svm->vmcb->control.exit_info_1 = fault->error_code; |
1763 | svm->vmcb->control.exit_info_2 = fault->address; | |
5bd2edc3 JR |
1764 | |
1765 | nested_svm_vmexit(svm); | |
1766 | } | |
1767 | ||
4b16184c JR |
1768 | static int nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) |
1769 | { | |
1770 | int r; | |
1771 | ||
1772 | r = kvm_init_shadow_mmu(vcpu, &vcpu->arch.mmu); | |
1773 | ||
1774 | vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3; | |
1775 | vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3; | |
1776 | vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit; | |
1777 | vcpu->arch.mmu.shadow_root_level = get_npt_level(); | |
1778 | vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu; | |
1779 | ||
1780 | return r; | |
1781 | } | |
1782 | ||
1783 | static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) | |
1784 | { | |
1785 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; | |
1786 | } | |
1787 | ||
c0725420 AG |
1788 | static int nested_svm_check_permissions(struct vcpu_svm *svm) |
1789 | { | |
f6801dff | 1790 | if (!(svm->vcpu.arch.efer & EFER_SVME) |
c0725420 AG |
1791 | || !is_paging(&svm->vcpu)) { |
1792 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
1793 | return 1; | |
1794 | } | |
1795 | ||
1796 | if (svm->vmcb->save.cpl) { | |
1797 | kvm_inject_gp(&svm->vcpu, 0); | |
1798 | return 1; | |
1799 | } | |
1800 | ||
1801 | return 0; | |
1802 | } | |
1803 | ||
cf74a78b AG |
1804 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, |
1805 | bool has_error_code, u32 error_code) | |
1806 | { | |
b8e88bc8 JR |
1807 | int vmexit; |
1808 | ||
2030753d | 1809 | if (!is_guest_mode(&svm->vcpu)) |
0295ad7d | 1810 | return 0; |
cf74a78b | 1811 | |
0295ad7d JR |
1812 | svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr; |
1813 | svm->vmcb->control.exit_code_hi = 0; | |
1814 | svm->vmcb->control.exit_info_1 = error_code; | |
1815 | svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2; | |
1816 | ||
b8e88bc8 JR |
1817 | vmexit = nested_svm_intercept(svm); |
1818 | if (vmexit == NESTED_EXIT_DONE) | |
1819 | svm->nested.exit_required = true; | |
1820 | ||
1821 | return vmexit; | |
cf74a78b AG |
1822 | } |
1823 | ||
8fe54654 JR |
1824 | /* This function returns true if it is save to enable the irq window */ |
1825 | static inline bool nested_svm_intr(struct vcpu_svm *svm) | |
cf74a78b | 1826 | { |
2030753d | 1827 | if (!is_guest_mode(&svm->vcpu)) |
8fe54654 | 1828 | return true; |
cf74a78b | 1829 | |
26666957 | 1830 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) |
8fe54654 | 1831 | return true; |
cf74a78b | 1832 | |
26666957 | 1833 | if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) |
8fe54654 | 1834 | return false; |
cf74a78b | 1835 | |
a0a07cd2 GN |
1836 | /* |
1837 | * if vmexit was already requested (by intercepted exception | |
1838 | * for instance) do not overwrite it with "external interrupt" | |
1839 | * vmexit. | |
1840 | */ | |
1841 | if (svm->nested.exit_required) | |
1842 | return false; | |
1843 | ||
197717d5 JR |
1844 | svm->vmcb->control.exit_code = SVM_EXIT_INTR; |
1845 | svm->vmcb->control.exit_info_1 = 0; | |
1846 | svm->vmcb->control.exit_info_2 = 0; | |
26666957 | 1847 | |
cd3ff653 JR |
1848 | if (svm->nested.intercept & 1ULL) { |
1849 | /* | |
1850 | * The #vmexit can't be emulated here directly because this | |
1851 | * code path runs with irqs and preemtion disabled. A | |
1852 | * #vmexit emulation might sleep. Only signal request for | |
1853 | * the #vmexit here. | |
1854 | */ | |
1855 | svm->nested.exit_required = true; | |
236649de | 1856 | trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip); |
8fe54654 | 1857 | return false; |
cf74a78b AG |
1858 | } |
1859 | ||
8fe54654 | 1860 | return true; |
cf74a78b AG |
1861 | } |
1862 | ||
887f500c JR |
1863 | /* This function returns true if it is save to enable the nmi window */ |
1864 | static inline bool nested_svm_nmi(struct vcpu_svm *svm) | |
1865 | { | |
2030753d | 1866 | if (!is_guest_mode(&svm->vcpu)) |
887f500c JR |
1867 | return true; |
1868 | ||
1869 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI))) | |
1870 | return true; | |
1871 | ||
1872 | svm->vmcb->control.exit_code = SVM_EXIT_NMI; | |
1873 | svm->nested.exit_required = true; | |
1874 | ||
1875 | return false; | |
cf74a78b AG |
1876 | } |
1877 | ||
7597f129 | 1878 | static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page) |
34f80cfa JR |
1879 | { |
1880 | struct page *page; | |
1881 | ||
6c3bd3d7 JR |
1882 | might_sleep(); |
1883 | ||
34f80cfa | 1884 | page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT); |
34f80cfa JR |
1885 | if (is_error_page(page)) |
1886 | goto error; | |
1887 | ||
7597f129 JR |
1888 | *_page = page; |
1889 | ||
1890 | return kmap(page); | |
34f80cfa JR |
1891 | |
1892 | error: | |
1893 | kvm_release_page_clean(page); | |
1894 | kvm_inject_gp(&svm->vcpu, 0); | |
1895 | ||
1896 | return NULL; | |
1897 | } | |
1898 | ||
7597f129 | 1899 | static void nested_svm_unmap(struct page *page) |
34f80cfa | 1900 | { |
7597f129 | 1901 | kunmap(page); |
34f80cfa JR |
1902 | kvm_release_page_dirty(page); |
1903 | } | |
34f80cfa | 1904 | |
ce2ac085 JR |
1905 | static int nested_svm_intercept_ioio(struct vcpu_svm *svm) |
1906 | { | |
1907 | unsigned port; | |
1908 | u8 val, bit; | |
1909 | u64 gpa; | |
34f80cfa | 1910 | |
ce2ac085 JR |
1911 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT))) |
1912 | return NESTED_EXIT_HOST; | |
34f80cfa | 1913 | |
ce2ac085 JR |
1914 | port = svm->vmcb->control.exit_info_1 >> 16; |
1915 | gpa = svm->nested.vmcb_iopm + (port / 8); | |
1916 | bit = port % 8; | |
1917 | val = 0; | |
1918 | ||
1919 | if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, 1)) | |
1920 | val &= (1 << bit); | |
1921 | ||
1922 | return val ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; | |
34f80cfa JR |
1923 | } |
1924 | ||
d2477826 | 1925 | static int nested_svm_exit_handled_msr(struct vcpu_svm *svm) |
4c2161ae | 1926 | { |
0d6b3537 JR |
1927 | u32 offset, msr, value; |
1928 | int write, mask; | |
4c2161ae | 1929 | |
3d62d9aa | 1930 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
d2477826 | 1931 | return NESTED_EXIT_HOST; |
3d62d9aa | 1932 | |
0d6b3537 JR |
1933 | msr = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
1934 | offset = svm_msrpm_offset(msr); | |
1935 | write = svm->vmcb->control.exit_info_1 & 1; | |
1936 | mask = 1 << ((2 * (msr & 0xf)) + write); | |
3d62d9aa | 1937 | |
0d6b3537 JR |
1938 | if (offset == MSR_INVALID) |
1939 | return NESTED_EXIT_DONE; | |
4c2161ae | 1940 | |
0d6b3537 JR |
1941 | /* Offset is in 32 bit units but need in 8 bit units */ |
1942 | offset *= 4; | |
4c2161ae | 1943 | |
0d6b3537 JR |
1944 | if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4)) |
1945 | return NESTED_EXIT_DONE; | |
3d62d9aa | 1946 | |
0d6b3537 | 1947 | return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; |
4c2161ae JR |
1948 | } |
1949 | ||
410e4d57 | 1950 | static int nested_svm_exit_special(struct vcpu_svm *svm) |
cf74a78b | 1951 | { |
cf74a78b | 1952 | u32 exit_code = svm->vmcb->control.exit_code; |
4c2161ae | 1953 | |
410e4d57 JR |
1954 | switch (exit_code) { |
1955 | case SVM_EXIT_INTR: | |
1956 | case SVM_EXIT_NMI: | |
ff47a49b | 1957 | case SVM_EXIT_EXCP_BASE + MC_VECTOR: |
410e4d57 | 1958 | return NESTED_EXIT_HOST; |
410e4d57 | 1959 | case SVM_EXIT_NPF: |
e0231715 | 1960 | /* For now we are always handling NPFs when using them */ |
410e4d57 JR |
1961 | if (npt_enabled) |
1962 | return NESTED_EXIT_HOST; | |
1963 | break; | |
410e4d57 | 1964 | case SVM_EXIT_EXCP_BASE + PF_VECTOR: |
631bc487 GN |
1965 | /* When we're shadowing, trap PFs, but not async PF */ |
1966 | if (!npt_enabled && svm->apf_reason == 0) | |
410e4d57 JR |
1967 | return NESTED_EXIT_HOST; |
1968 | break; | |
66a562f7 JR |
1969 | case SVM_EXIT_EXCP_BASE + NM_VECTOR: |
1970 | nm_interception(svm); | |
1971 | break; | |
410e4d57 JR |
1972 | default: |
1973 | break; | |
cf74a78b AG |
1974 | } |
1975 | ||
410e4d57 JR |
1976 | return NESTED_EXIT_CONTINUE; |
1977 | } | |
1978 | ||
1979 | /* | |
1980 | * If this function returns true, this #vmexit was already handled | |
1981 | */ | |
b8e88bc8 | 1982 | static int nested_svm_intercept(struct vcpu_svm *svm) |
410e4d57 JR |
1983 | { |
1984 | u32 exit_code = svm->vmcb->control.exit_code; | |
1985 | int vmexit = NESTED_EXIT_HOST; | |
1986 | ||
cf74a78b | 1987 | switch (exit_code) { |
9c4e40b9 | 1988 | case SVM_EXIT_MSR: |
3d62d9aa | 1989 | vmexit = nested_svm_exit_handled_msr(svm); |
9c4e40b9 | 1990 | break; |
ce2ac085 JR |
1991 | case SVM_EXIT_IOIO: |
1992 | vmexit = nested_svm_intercept_ioio(svm); | |
1993 | break; | |
4ee546b4 RJ |
1994 | case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: { |
1995 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0); | |
1996 | if (svm->nested.intercept_cr & bit) | |
410e4d57 | 1997 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
1998 | break; |
1999 | } | |
3aed041a JR |
2000 | case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: { |
2001 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0); | |
2002 | if (svm->nested.intercept_dr & bit) | |
410e4d57 | 2003 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2004 | break; |
2005 | } | |
2006 | case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: { | |
2007 | u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE); | |
aad42c64 | 2008 | if (svm->nested.intercept_exceptions & excp_bits) |
410e4d57 | 2009 | vmexit = NESTED_EXIT_DONE; |
631bc487 GN |
2010 | /* async page fault always cause vmexit */ |
2011 | else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) && | |
2012 | svm->apf_reason != 0) | |
2013 | vmexit = NESTED_EXIT_DONE; | |
cf74a78b AG |
2014 | break; |
2015 | } | |
228070b1 JR |
2016 | case SVM_EXIT_ERR: { |
2017 | vmexit = NESTED_EXIT_DONE; | |
2018 | break; | |
2019 | } | |
cf74a78b AG |
2020 | default: { |
2021 | u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR); | |
aad42c64 | 2022 | if (svm->nested.intercept & exit_bits) |
410e4d57 | 2023 | vmexit = NESTED_EXIT_DONE; |
cf74a78b AG |
2024 | } |
2025 | } | |
2026 | ||
b8e88bc8 JR |
2027 | return vmexit; |
2028 | } | |
2029 | ||
2030 | static int nested_svm_exit_handled(struct vcpu_svm *svm) | |
2031 | { | |
2032 | int vmexit; | |
2033 | ||
2034 | vmexit = nested_svm_intercept(svm); | |
2035 | ||
2036 | if (vmexit == NESTED_EXIT_DONE) | |
9c4e40b9 | 2037 | nested_svm_vmexit(svm); |
9c4e40b9 JR |
2038 | |
2039 | return vmexit; | |
cf74a78b AG |
2040 | } |
2041 | ||
0460a979 JR |
2042 | static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb) |
2043 | { | |
2044 | struct vmcb_control_area *dst = &dst_vmcb->control; | |
2045 | struct vmcb_control_area *from = &from_vmcb->control; | |
2046 | ||
4ee546b4 | 2047 | dst->intercept_cr = from->intercept_cr; |
3aed041a | 2048 | dst->intercept_dr = from->intercept_dr; |
0460a979 JR |
2049 | dst->intercept_exceptions = from->intercept_exceptions; |
2050 | dst->intercept = from->intercept; | |
2051 | dst->iopm_base_pa = from->iopm_base_pa; | |
2052 | dst->msrpm_base_pa = from->msrpm_base_pa; | |
2053 | dst->tsc_offset = from->tsc_offset; | |
2054 | dst->asid = from->asid; | |
2055 | dst->tlb_ctl = from->tlb_ctl; | |
2056 | dst->int_ctl = from->int_ctl; | |
2057 | dst->int_vector = from->int_vector; | |
2058 | dst->int_state = from->int_state; | |
2059 | dst->exit_code = from->exit_code; | |
2060 | dst->exit_code_hi = from->exit_code_hi; | |
2061 | dst->exit_info_1 = from->exit_info_1; | |
2062 | dst->exit_info_2 = from->exit_info_2; | |
2063 | dst->exit_int_info = from->exit_int_info; | |
2064 | dst->exit_int_info_err = from->exit_int_info_err; | |
2065 | dst->nested_ctl = from->nested_ctl; | |
2066 | dst->event_inj = from->event_inj; | |
2067 | dst->event_inj_err = from->event_inj_err; | |
2068 | dst->nested_cr3 = from->nested_cr3; | |
2069 | dst->lbr_ctl = from->lbr_ctl; | |
2070 | } | |
2071 | ||
34f80cfa | 2072 | static int nested_svm_vmexit(struct vcpu_svm *svm) |
cf74a78b | 2073 | { |
34f80cfa | 2074 | struct vmcb *nested_vmcb; |
e6aa9abd | 2075 | struct vmcb *hsave = svm->nested.hsave; |
33740e40 | 2076 | struct vmcb *vmcb = svm->vmcb; |
7597f129 | 2077 | struct page *page; |
cf74a78b | 2078 | |
17897f36 JR |
2079 | trace_kvm_nested_vmexit_inject(vmcb->control.exit_code, |
2080 | vmcb->control.exit_info_1, | |
2081 | vmcb->control.exit_info_2, | |
2082 | vmcb->control.exit_int_info, | |
2083 | vmcb->control.exit_int_info_err); | |
2084 | ||
7597f129 | 2085 | nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page); |
34f80cfa JR |
2086 | if (!nested_vmcb) |
2087 | return 1; | |
2088 | ||
2030753d JR |
2089 | /* Exit Guest-Mode */ |
2090 | leave_guest_mode(&svm->vcpu); | |
06fc7772 JR |
2091 | svm->nested.vmcb = 0; |
2092 | ||
cf74a78b | 2093 | /* Give the current vmcb to the guest */ |
33740e40 JR |
2094 | disable_gif(svm); |
2095 | ||
2096 | nested_vmcb->save.es = vmcb->save.es; | |
2097 | nested_vmcb->save.cs = vmcb->save.cs; | |
2098 | nested_vmcb->save.ss = vmcb->save.ss; | |
2099 | nested_vmcb->save.ds = vmcb->save.ds; | |
2100 | nested_vmcb->save.gdtr = vmcb->save.gdtr; | |
2101 | nested_vmcb->save.idtr = vmcb->save.idtr; | |
3f6a9d16 | 2102 | nested_vmcb->save.efer = svm->vcpu.arch.efer; |
cdbbdc12 | 2103 | nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu); |
2be4fc7a | 2104 | nested_vmcb->save.cr3 = svm->vcpu.arch.cr3; |
33740e40 | 2105 | nested_vmcb->save.cr2 = vmcb->save.cr2; |
cdbbdc12 | 2106 | nested_vmcb->save.cr4 = svm->vcpu.arch.cr4; |
33740e40 JR |
2107 | nested_vmcb->save.rflags = vmcb->save.rflags; |
2108 | nested_vmcb->save.rip = vmcb->save.rip; | |
2109 | nested_vmcb->save.rsp = vmcb->save.rsp; | |
2110 | nested_vmcb->save.rax = vmcb->save.rax; | |
2111 | nested_vmcb->save.dr7 = vmcb->save.dr7; | |
2112 | nested_vmcb->save.dr6 = vmcb->save.dr6; | |
2113 | nested_vmcb->save.cpl = vmcb->save.cpl; | |
2114 | ||
2115 | nested_vmcb->control.int_ctl = vmcb->control.int_ctl; | |
2116 | nested_vmcb->control.int_vector = vmcb->control.int_vector; | |
2117 | nested_vmcb->control.int_state = vmcb->control.int_state; | |
2118 | nested_vmcb->control.exit_code = vmcb->control.exit_code; | |
2119 | nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi; | |
2120 | nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1; | |
2121 | nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2; | |
2122 | nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info; | |
2123 | nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err; | |
7a190667 | 2124 | nested_vmcb->control.next_rip = vmcb->control.next_rip; |
8d23c466 AG |
2125 | |
2126 | /* | |
2127 | * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have | |
2128 | * to make sure that we do not lose injected events. So check event_inj | |
2129 | * here and copy it to exit_int_info if it is valid. | |
2130 | * Exit_int_info and event_inj can't be both valid because the case | |
2131 | * below only happens on a VMRUN instruction intercept which has | |
2132 | * no valid exit_int_info set. | |
2133 | */ | |
2134 | if (vmcb->control.event_inj & SVM_EVTINJ_VALID) { | |
2135 | struct vmcb_control_area *nc = &nested_vmcb->control; | |
2136 | ||
2137 | nc->exit_int_info = vmcb->control.event_inj; | |
2138 | nc->exit_int_info_err = vmcb->control.event_inj_err; | |
2139 | } | |
2140 | ||
33740e40 JR |
2141 | nested_vmcb->control.tlb_ctl = 0; |
2142 | nested_vmcb->control.event_inj = 0; | |
2143 | nested_vmcb->control.event_inj_err = 0; | |
cf74a78b AG |
2144 | |
2145 | /* We always set V_INTR_MASKING and remember the old value in hflags */ | |
2146 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) | |
2147 | nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK; | |
2148 | ||
cf74a78b | 2149 | /* Restore the original control entries */ |
0460a979 | 2150 | copy_vmcb_control_area(vmcb, hsave); |
cf74a78b | 2151 | |
219b65dc AG |
2152 | kvm_clear_exception_queue(&svm->vcpu); |
2153 | kvm_clear_interrupt_queue(&svm->vcpu); | |
cf74a78b | 2154 | |
4b16184c JR |
2155 | svm->nested.nested_cr3 = 0; |
2156 | ||
cf74a78b AG |
2157 | /* Restore selected save entries */ |
2158 | svm->vmcb->save.es = hsave->save.es; | |
2159 | svm->vmcb->save.cs = hsave->save.cs; | |
2160 | svm->vmcb->save.ss = hsave->save.ss; | |
2161 | svm->vmcb->save.ds = hsave->save.ds; | |
2162 | svm->vmcb->save.gdtr = hsave->save.gdtr; | |
2163 | svm->vmcb->save.idtr = hsave->save.idtr; | |
2164 | svm->vmcb->save.rflags = hsave->save.rflags; | |
2165 | svm_set_efer(&svm->vcpu, hsave->save.efer); | |
2166 | svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE); | |
2167 | svm_set_cr4(&svm->vcpu, hsave->save.cr4); | |
2168 | if (npt_enabled) { | |
2169 | svm->vmcb->save.cr3 = hsave->save.cr3; | |
2170 | svm->vcpu.arch.cr3 = hsave->save.cr3; | |
2171 | } else { | |
2390218b | 2172 | (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3); |
cf74a78b AG |
2173 | } |
2174 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax); | |
2175 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp); | |
2176 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip); | |
2177 | svm->vmcb->save.dr7 = 0; | |
2178 | svm->vmcb->save.cpl = 0; | |
2179 | svm->vmcb->control.exit_int_info = 0; | |
2180 | ||
8d28fec4 RJ |
2181 | mark_all_dirty(svm->vmcb); |
2182 | ||
7597f129 | 2183 | nested_svm_unmap(page); |
cf74a78b | 2184 | |
4b16184c | 2185 | nested_svm_uninit_mmu_context(&svm->vcpu); |
cf74a78b AG |
2186 | kvm_mmu_reset_context(&svm->vcpu); |
2187 | kvm_mmu_load(&svm->vcpu); | |
2188 | ||
2189 | return 0; | |
2190 | } | |
3d6368ef | 2191 | |
9738b2c9 | 2192 | static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) |
3d6368ef | 2193 | { |
323c3d80 JR |
2194 | /* |
2195 | * This function merges the msr permission bitmaps of kvm and the | |
2196 | * nested vmcb. It is omptimized in that it only merges the parts where | |
2197 | * the kvm msr permission bitmap may contain zero bits | |
2198 | */ | |
3d6368ef | 2199 | int i; |
9738b2c9 | 2200 | |
323c3d80 JR |
2201 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) |
2202 | return true; | |
9738b2c9 | 2203 | |
323c3d80 JR |
2204 | for (i = 0; i < MSRPM_OFFSETS; i++) { |
2205 | u32 value, p; | |
2206 | u64 offset; | |
9738b2c9 | 2207 | |
323c3d80 JR |
2208 | if (msrpm_offsets[i] == 0xffffffff) |
2209 | break; | |
3d6368ef | 2210 | |
0d6b3537 JR |
2211 | p = msrpm_offsets[i]; |
2212 | offset = svm->nested.vmcb_msrpm + (p * 4); | |
323c3d80 JR |
2213 | |
2214 | if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4)) | |
2215 | return false; | |
2216 | ||
2217 | svm->nested.msrpm[p] = svm->msrpm[p] | value; | |
2218 | } | |
3d6368ef | 2219 | |
323c3d80 | 2220 | svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm); |
9738b2c9 JR |
2221 | |
2222 | return true; | |
3d6368ef AG |
2223 | } |
2224 | ||
52c65a30 JR |
2225 | static bool nested_vmcb_checks(struct vmcb *vmcb) |
2226 | { | |
2227 | if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0) | |
2228 | return false; | |
2229 | ||
dbe77584 JR |
2230 | if (vmcb->control.asid == 0) |
2231 | return false; | |
2232 | ||
4b16184c JR |
2233 | if (vmcb->control.nested_ctl && !npt_enabled) |
2234 | return false; | |
2235 | ||
52c65a30 JR |
2236 | return true; |
2237 | } | |
2238 | ||
9738b2c9 | 2239 | static bool nested_svm_vmrun(struct vcpu_svm *svm) |
3d6368ef | 2240 | { |
9738b2c9 | 2241 | struct vmcb *nested_vmcb; |
e6aa9abd | 2242 | struct vmcb *hsave = svm->nested.hsave; |
defbba56 | 2243 | struct vmcb *vmcb = svm->vmcb; |
7597f129 | 2244 | struct page *page; |
06fc7772 | 2245 | u64 vmcb_gpa; |
3d6368ef | 2246 | |
06fc7772 | 2247 | vmcb_gpa = svm->vmcb->save.rax; |
3d6368ef | 2248 | |
7597f129 | 2249 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9738b2c9 JR |
2250 | if (!nested_vmcb) |
2251 | return false; | |
2252 | ||
52c65a30 JR |
2253 | if (!nested_vmcb_checks(nested_vmcb)) { |
2254 | nested_vmcb->control.exit_code = SVM_EXIT_ERR; | |
2255 | nested_vmcb->control.exit_code_hi = 0; | |
2256 | nested_vmcb->control.exit_info_1 = 0; | |
2257 | nested_vmcb->control.exit_info_2 = 0; | |
2258 | ||
2259 | nested_svm_unmap(page); | |
2260 | ||
2261 | return false; | |
2262 | } | |
2263 | ||
b75f4eb3 | 2264 | trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa, |
0ac406de JR |
2265 | nested_vmcb->save.rip, |
2266 | nested_vmcb->control.int_ctl, | |
2267 | nested_vmcb->control.event_inj, | |
2268 | nested_vmcb->control.nested_ctl); | |
2269 | ||
4ee546b4 RJ |
2270 | trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff, |
2271 | nested_vmcb->control.intercept_cr >> 16, | |
2e554e8d JR |
2272 | nested_vmcb->control.intercept_exceptions, |
2273 | nested_vmcb->control.intercept); | |
2274 | ||
3d6368ef | 2275 | /* Clear internal status */ |
219b65dc AG |
2276 | kvm_clear_exception_queue(&svm->vcpu); |
2277 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3d6368ef | 2278 | |
e0231715 JR |
2279 | /* |
2280 | * Save the old vmcb, so we don't need to pick what we save, but can | |
2281 | * restore everything when a VMEXIT occurs | |
2282 | */ | |
defbba56 JR |
2283 | hsave->save.es = vmcb->save.es; |
2284 | hsave->save.cs = vmcb->save.cs; | |
2285 | hsave->save.ss = vmcb->save.ss; | |
2286 | hsave->save.ds = vmcb->save.ds; | |
2287 | hsave->save.gdtr = vmcb->save.gdtr; | |
2288 | hsave->save.idtr = vmcb->save.idtr; | |
f6801dff | 2289 | hsave->save.efer = svm->vcpu.arch.efer; |
4d4ec087 | 2290 | hsave->save.cr0 = kvm_read_cr0(&svm->vcpu); |
defbba56 JR |
2291 | hsave->save.cr4 = svm->vcpu.arch.cr4; |
2292 | hsave->save.rflags = vmcb->save.rflags; | |
b75f4eb3 | 2293 | hsave->save.rip = kvm_rip_read(&svm->vcpu); |
defbba56 JR |
2294 | hsave->save.rsp = vmcb->save.rsp; |
2295 | hsave->save.rax = vmcb->save.rax; | |
2296 | if (npt_enabled) | |
2297 | hsave->save.cr3 = vmcb->save.cr3; | |
2298 | else | |
2299 | hsave->save.cr3 = svm->vcpu.arch.cr3; | |
2300 | ||
0460a979 | 2301 | copy_vmcb_control_area(hsave, vmcb); |
3d6368ef AG |
2302 | |
2303 | if (svm->vmcb->save.rflags & X86_EFLAGS_IF) | |
2304 | svm->vcpu.arch.hflags |= HF_HIF_MASK; | |
2305 | else | |
2306 | svm->vcpu.arch.hflags &= ~HF_HIF_MASK; | |
2307 | ||
4b16184c JR |
2308 | if (nested_vmcb->control.nested_ctl) { |
2309 | kvm_mmu_unload(&svm->vcpu); | |
2310 | svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3; | |
2311 | nested_svm_init_mmu_context(&svm->vcpu); | |
2312 | } | |
2313 | ||
3d6368ef AG |
2314 | /* Load the nested guest state */ |
2315 | svm->vmcb->save.es = nested_vmcb->save.es; | |
2316 | svm->vmcb->save.cs = nested_vmcb->save.cs; | |
2317 | svm->vmcb->save.ss = nested_vmcb->save.ss; | |
2318 | svm->vmcb->save.ds = nested_vmcb->save.ds; | |
2319 | svm->vmcb->save.gdtr = nested_vmcb->save.gdtr; | |
2320 | svm->vmcb->save.idtr = nested_vmcb->save.idtr; | |
2321 | svm->vmcb->save.rflags = nested_vmcb->save.rflags; | |
2322 | svm_set_efer(&svm->vcpu, nested_vmcb->save.efer); | |
2323 | svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0); | |
2324 | svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4); | |
2325 | if (npt_enabled) { | |
2326 | svm->vmcb->save.cr3 = nested_vmcb->save.cr3; | |
2327 | svm->vcpu.arch.cr3 = nested_vmcb->save.cr3; | |
0e5cbe36 | 2328 | } else |
2390218b | 2329 | (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); |
0e5cbe36 JR |
2330 | |
2331 | /* Guest paging mode is active - reset mmu */ | |
2332 | kvm_mmu_reset_context(&svm->vcpu); | |
2333 | ||
defbba56 | 2334 | svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; |
3d6368ef AG |
2335 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); |
2336 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); | |
2337 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); | |
e0231715 | 2338 | |
3d6368ef AG |
2339 | /* In case we don't even reach vcpu_run, the fields are not updated */ |
2340 | svm->vmcb->save.rax = nested_vmcb->save.rax; | |
2341 | svm->vmcb->save.rsp = nested_vmcb->save.rsp; | |
2342 | svm->vmcb->save.rip = nested_vmcb->save.rip; | |
2343 | svm->vmcb->save.dr7 = nested_vmcb->save.dr7; | |
2344 | svm->vmcb->save.dr6 = nested_vmcb->save.dr6; | |
2345 | svm->vmcb->save.cpl = nested_vmcb->save.cpl; | |
2346 | ||
f7138538 | 2347 | svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL; |
ce2ac085 | 2348 | svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL; |
3d6368ef | 2349 | |
aad42c64 | 2350 | /* cache intercepts */ |
4ee546b4 | 2351 | svm->nested.intercept_cr = nested_vmcb->control.intercept_cr; |
3aed041a | 2352 | svm->nested.intercept_dr = nested_vmcb->control.intercept_dr; |
aad42c64 JR |
2353 | svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions; |
2354 | svm->nested.intercept = nested_vmcb->control.intercept; | |
2355 | ||
3d6368ef | 2356 | force_new_asid(&svm->vcpu); |
3d6368ef | 2357 | svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK; |
3d6368ef AG |
2358 | if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK) |
2359 | svm->vcpu.arch.hflags |= HF_VINTR_MASK; | |
2360 | else | |
2361 | svm->vcpu.arch.hflags &= ~HF_VINTR_MASK; | |
2362 | ||
88ab24ad JR |
2363 | if (svm->vcpu.arch.hflags & HF_VINTR_MASK) { |
2364 | /* We only want the cr8 intercept bits of the guest */ | |
4ee546b4 RJ |
2365 | clr_cr_intercept(svm, INTERCEPT_CR8_READ); |
2366 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
88ab24ad JR |
2367 | } |
2368 | ||
0d945bd9 | 2369 | /* We don't want to see VMMCALLs from a nested guest */ |
8a05a1b8 | 2370 | clr_intercept(svm, INTERCEPT_VMMCALL); |
0d945bd9 | 2371 | |
88ab24ad | 2372 | svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl; |
3d6368ef AG |
2373 | svm->vmcb->control.int_vector = nested_vmcb->control.int_vector; |
2374 | svm->vmcb->control.int_state = nested_vmcb->control.int_state; | |
2375 | svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset; | |
3d6368ef AG |
2376 | svm->vmcb->control.event_inj = nested_vmcb->control.event_inj; |
2377 | svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err; | |
2378 | ||
7597f129 | 2379 | nested_svm_unmap(page); |
9738b2c9 | 2380 | |
2030753d JR |
2381 | /* Enter Guest-Mode */ |
2382 | enter_guest_mode(&svm->vcpu); | |
2383 | ||
384c6368 JR |
2384 | /* |
2385 | * Merge guest and host intercepts - must be called with vcpu in | |
2386 | * guest-mode to take affect here | |
2387 | */ | |
2388 | recalc_intercepts(svm); | |
2389 | ||
06fc7772 | 2390 | svm->nested.vmcb = vmcb_gpa; |
9738b2c9 | 2391 | |
2af9194d | 2392 | enable_gif(svm); |
3d6368ef | 2393 | |
8d28fec4 RJ |
2394 | mark_all_dirty(svm->vmcb); |
2395 | ||
9738b2c9 | 2396 | return true; |
3d6368ef AG |
2397 | } |
2398 | ||
9966bf68 | 2399 | static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb) |
5542675b AG |
2400 | { |
2401 | to_vmcb->save.fs = from_vmcb->save.fs; | |
2402 | to_vmcb->save.gs = from_vmcb->save.gs; | |
2403 | to_vmcb->save.tr = from_vmcb->save.tr; | |
2404 | to_vmcb->save.ldtr = from_vmcb->save.ldtr; | |
2405 | to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base; | |
2406 | to_vmcb->save.star = from_vmcb->save.star; | |
2407 | to_vmcb->save.lstar = from_vmcb->save.lstar; | |
2408 | to_vmcb->save.cstar = from_vmcb->save.cstar; | |
2409 | to_vmcb->save.sfmask = from_vmcb->save.sfmask; | |
2410 | to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs; | |
2411 | to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp; | |
2412 | to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip; | |
5542675b AG |
2413 | } |
2414 | ||
851ba692 | 2415 | static int vmload_interception(struct vcpu_svm *svm) |
5542675b | 2416 | { |
9966bf68 | 2417 | struct vmcb *nested_vmcb; |
7597f129 | 2418 | struct page *page; |
9966bf68 | 2419 | |
5542675b AG |
2420 | if (nested_svm_check_permissions(svm)) |
2421 | return 1; | |
2422 | ||
2423 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2424 | skip_emulated_instruction(&svm->vcpu); | |
2425 | ||
7597f129 | 2426 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9966bf68 JR |
2427 | if (!nested_vmcb) |
2428 | return 1; | |
2429 | ||
2430 | nested_svm_vmloadsave(nested_vmcb, svm->vmcb); | |
7597f129 | 2431 | nested_svm_unmap(page); |
5542675b AG |
2432 | |
2433 | return 1; | |
2434 | } | |
2435 | ||
851ba692 | 2436 | static int vmsave_interception(struct vcpu_svm *svm) |
5542675b | 2437 | { |
9966bf68 | 2438 | struct vmcb *nested_vmcb; |
7597f129 | 2439 | struct page *page; |
9966bf68 | 2440 | |
5542675b AG |
2441 | if (nested_svm_check_permissions(svm)) |
2442 | return 1; | |
2443 | ||
2444 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2445 | skip_emulated_instruction(&svm->vcpu); | |
2446 | ||
7597f129 | 2447 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); |
9966bf68 JR |
2448 | if (!nested_vmcb) |
2449 | return 1; | |
2450 | ||
2451 | nested_svm_vmloadsave(svm->vmcb, nested_vmcb); | |
7597f129 | 2452 | nested_svm_unmap(page); |
5542675b AG |
2453 | |
2454 | return 1; | |
2455 | } | |
2456 | ||
851ba692 | 2457 | static int vmrun_interception(struct vcpu_svm *svm) |
3d6368ef | 2458 | { |
3d6368ef AG |
2459 | if (nested_svm_check_permissions(svm)) |
2460 | return 1; | |
2461 | ||
b75f4eb3 RJ |
2462 | /* Save rip after vmrun instruction */ |
2463 | kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3); | |
3d6368ef | 2464 | |
9738b2c9 | 2465 | if (!nested_svm_vmrun(svm)) |
3d6368ef AG |
2466 | return 1; |
2467 | ||
9738b2c9 | 2468 | if (!nested_svm_vmrun_msrpm(svm)) |
1f8da478 JR |
2469 | goto failed; |
2470 | ||
2471 | return 1; | |
2472 | ||
2473 | failed: | |
2474 | ||
2475 | svm->vmcb->control.exit_code = SVM_EXIT_ERR; | |
2476 | svm->vmcb->control.exit_code_hi = 0; | |
2477 | svm->vmcb->control.exit_info_1 = 0; | |
2478 | svm->vmcb->control.exit_info_2 = 0; | |
2479 | ||
2480 | nested_svm_vmexit(svm); | |
3d6368ef AG |
2481 | |
2482 | return 1; | |
2483 | } | |
2484 | ||
851ba692 | 2485 | static int stgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
2486 | { |
2487 | if (nested_svm_check_permissions(svm)) | |
2488 | return 1; | |
2489 | ||
2490 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2491 | skip_emulated_instruction(&svm->vcpu); | |
3842d135 | 2492 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
1371d904 | 2493 | |
2af9194d | 2494 | enable_gif(svm); |
1371d904 AG |
2495 | |
2496 | return 1; | |
2497 | } | |
2498 | ||
851ba692 | 2499 | static int clgi_interception(struct vcpu_svm *svm) |
1371d904 AG |
2500 | { |
2501 | if (nested_svm_check_permissions(svm)) | |
2502 | return 1; | |
2503 | ||
2504 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2505 | skip_emulated_instruction(&svm->vcpu); | |
2506 | ||
2af9194d | 2507 | disable_gif(svm); |
1371d904 AG |
2508 | |
2509 | /* After a CLGI no interrupts should come */ | |
2510 | svm_clear_vintr(svm); | |
2511 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; | |
2512 | ||
decdbf6a JR |
2513 | mark_dirty(svm->vmcb, VMCB_INTR); |
2514 | ||
1371d904 AG |
2515 | return 1; |
2516 | } | |
2517 | ||
851ba692 | 2518 | static int invlpga_interception(struct vcpu_svm *svm) |
ff092385 AG |
2519 | { |
2520 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
ff092385 | 2521 | |
ec1ff790 JR |
2522 | trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX], |
2523 | vcpu->arch.regs[VCPU_REGS_RAX]); | |
2524 | ||
ff092385 AG |
2525 | /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */ |
2526 | kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]); | |
2527 | ||
2528 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2529 | skip_emulated_instruction(&svm->vcpu); | |
2530 | return 1; | |
2531 | } | |
2532 | ||
532a46b9 JR |
2533 | static int skinit_interception(struct vcpu_svm *svm) |
2534 | { | |
2535 | trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]); | |
2536 | ||
2537 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2538 | return 1; | |
2539 | } | |
2540 | ||
851ba692 | 2541 | static int invalid_op_interception(struct vcpu_svm *svm) |
6aa8b732 | 2542 | { |
7ee5d940 | 2543 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); |
6aa8b732 AK |
2544 | return 1; |
2545 | } | |
2546 | ||
851ba692 | 2547 | static int task_switch_interception(struct vcpu_svm *svm) |
6aa8b732 | 2548 | { |
37817f29 | 2549 | u16 tss_selector; |
64a7ec06 GN |
2550 | int reason; |
2551 | int int_type = svm->vmcb->control.exit_int_info & | |
2552 | SVM_EXITINTINFO_TYPE_MASK; | |
8317c298 | 2553 | int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK; |
fe8e7f83 GN |
2554 | uint32_t type = |
2555 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK; | |
2556 | uint32_t idt_v = | |
2557 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID; | |
e269fb21 JK |
2558 | bool has_error_code = false; |
2559 | u32 error_code = 0; | |
37817f29 IE |
2560 | |
2561 | tss_selector = (u16)svm->vmcb->control.exit_info_1; | |
64a7ec06 | 2562 | |
37817f29 IE |
2563 | if (svm->vmcb->control.exit_info_2 & |
2564 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET)) | |
64a7ec06 GN |
2565 | reason = TASK_SWITCH_IRET; |
2566 | else if (svm->vmcb->control.exit_info_2 & | |
2567 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP)) | |
2568 | reason = TASK_SWITCH_JMP; | |
fe8e7f83 | 2569 | else if (idt_v) |
64a7ec06 GN |
2570 | reason = TASK_SWITCH_GATE; |
2571 | else | |
2572 | reason = TASK_SWITCH_CALL; | |
2573 | ||
fe8e7f83 GN |
2574 | if (reason == TASK_SWITCH_GATE) { |
2575 | switch (type) { | |
2576 | case SVM_EXITINTINFO_TYPE_NMI: | |
2577 | svm->vcpu.arch.nmi_injected = false; | |
2578 | break; | |
2579 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
e269fb21 JK |
2580 | if (svm->vmcb->control.exit_info_2 & |
2581 | (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) { | |
2582 | has_error_code = true; | |
2583 | error_code = | |
2584 | (u32)svm->vmcb->control.exit_info_2; | |
2585 | } | |
fe8e7f83 GN |
2586 | kvm_clear_exception_queue(&svm->vcpu); |
2587 | break; | |
2588 | case SVM_EXITINTINFO_TYPE_INTR: | |
2589 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2590 | break; | |
2591 | default: | |
2592 | break; | |
2593 | } | |
2594 | } | |
64a7ec06 | 2595 | |
8317c298 GN |
2596 | if (reason != TASK_SWITCH_GATE || |
2597 | int_type == SVM_EXITINTINFO_TYPE_SOFT || | |
2598 | (int_type == SVM_EXITINTINFO_TYPE_EXEPT && | |
f629cf84 GN |
2599 | (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) |
2600 | skip_emulated_instruction(&svm->vcpu); | |
64a7ec06 | 2601 | |
acb54517 GN |
2602 | if (kvm_task_switch(&svm->vcpu, tss_selector, reason, |
2603 | has_error_code, error_code) == EMULATE_FAIL) { | |
2604 | svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2605 | svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
2606 | svm->vcpu.run->internal.ndata = 0; | |
2607 | return 0; | |
2608 | } | |
2609 | return 1; | |
6aa8b732 AK |
2610 | } |
2611 | ||
851ba692 | 2612 | static int cpuid_interception(struct vcpu_svm *svm) |
6aa8b732 | 2613 | { |
5fdbf976 | 2614 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2615 | kvm_emulate_cpuid(&svm->vcpu); |
06465c5a | 2616 | return 1; |
6aa8b732 AK |
2617 | } |
2618 | ||
851ba692 | 2619 | static int iret_interception(struct vcpu_svm *svm) |
95ba8273 GN |
2620 | { |
2621 | ++svm->vcpu.stat.nmi_window_exits; | |
8a05a1b8 | 2622 | clr_intercept(svm, INTERCEPT_IRET); |
44c11430 | 2623 | svm->vcpu.arch.hflags |= HF_IRET_MASK; |
95ba8273 GN |
2624 | return 1; |
2625 | } | |
2626 | ||
851ba692 | 2627 | static int invlpg_interception(struct vcpu_svm *svm) |
a7052897 | 2628 | { |
6d77dbfc | 2629 | return emulate_instruction(&svm->vcpu, 0, 0, 0) == EMULATE_DONE; |
a7052897 MT |
2630 | } |
2631 | ||
851ba692 | 2632 | static int emulate_on_interception(struct vcpu_svm *svm) |
6aa8b732 | 2633 | { |
6d77dbfc | 2634 | return emulate_instruction(&svm->vcpu, 0, 0, 0) == EMULATE_DONE; |
6aa8b732 AK |
2635 | } |
2636 | ||
cda00082 JR |
2637 | static int cr0_write_interception(struct vcpu_svm *svm) |
2638 | { | |
2639 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
2640 | int r; | |
2641 | ||
2642 | r = emulate_instruction(&svm->vcpu, 0, 0, 0); | |
2643 | ||
2644 | if (svm->nested.vmexit_rip) { | |
2645 | kvm_register_write(vcpu, VCPU_REGS_RIP, svm->nested.vmexit_rip); | |
2646 | kvm_register_write(vcpu, VCPU_REGS_RSP, svm->nested.vmexit_rsp); | |
2647 | kvm_register_write(vcpu, VCPU_REGS_RAX, svm->nested.vmexit_rax); | |
2648 | svm->nested.vmexit_rip = 0; | |
2649 | } | |
2650 | ||
2651 | return r == EMULATE_DONE; | |
2652 | } | |
2653 | ||
851ba692 | 2654 | static int cr8_write_interception(struct vcpu_svm *svm) |
1d075434 | 2655 | { |
851ba692 AK |
2656 | struct kvm_run *kvm_run = svm->vcpu.run; |
2657 | ||
0a5fff19 GN |
2658 | u8 cr8_prev = kvm_get_cr8(&svm->vcpu); |
2659 | /* instruction emulation calls kvm_set_cr8() */ | |
851ba692 | 2660 | emulate_instruction(&svm->vcpu, 0, 0, 0); |
95ba8273 | 2661 | if (irqchip_in_kernel(svm->vcpu.kvm)) { |
4ee546b4 | 2662 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); |
1d075434 | 2663 | return 1; |
95ba8273 | 2664 | } |
0a5fff19 GN |
2665 | if (cr8_prev <= kvm_get_cr8(&svm->vcpu)) |
2666 | return 1; | |
1d075434 JR |
2667 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; |
2668 | return 0; | |
2669 | } | |
2670 | ||
6aa8b732 AK |
2671 | static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) |
2672 | { | |
a2fa3e9f GH |
2673 | struct vcpu_svm *svm = to_svm(vcpu); |
2674 | ||
6aa8b732 | 2675 | switch (ecx) { |
af24a4e4 | 2676 | case MSR_IA32_TSC: { |
4cc70310 | 2677 | struct vmcb *vmcb = get_host_vmcb(svm); |
6aa8b732 | 2678 | |
4cc70310 | 2679 | *data = vmcb->control.tsc_offset + native_read_tsc(); |
6aa8b732 AK |
2680 | break; |
2681 | } | |
8c06585d | 2682 | case MSR_STAR: |
a2fa3e9f | 2683 | *data = svm->vmcb->save.star; |
6aa8b732 | 2684 | break; |
0e859cac | 2685 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2686 | case MSR_LSTAR: |
a2fa3e9f | 2687 | *data = svm->vmcb->save.lstar; |
6aa8b732 AK |
2688 | break; |
2689 | case MSR_CSTAR: | |
a2fa3e9f | 2690 | *data = svm->vmcb->save.cstar; |
6aa8b732 AK |
2691 | break; |
2692 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 2693 | *data = svm->vmcb->save.kernel_gs_base; |
6aa8b732 AK |
2694 | break; |
2695 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 2696 | *data = svm->vmcb->save.sfmask; |
6aa8b732 AK |
2697 | break; |
2698 | #endif | |
2699 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 2700 | *data = svm->vmcb->save.sysenter_cs; |
6aa8b732 AK |
2701 | break; |
2702 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 2703 | *data = svm->sysenter_eip; |
6aa8b732 AK |
2704 | break; |
2705 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 2706 | *data = svm->sysenter_esp; |
6aa8b732 | 2707 | break; |
e0231715 JR |
2708 | /* |
2709 | * Nobody will change the following 5 values in the VMCB so we can | |
2710 | * safely return them on rdmsr. They will always be 0 until LBRV is | |
2711 | * implemented. | |
2712 | */ | |
a2938c80 JR |
2713 | case MSR_IA32_DEBUGCTLMSR: |
2714 | *data = svm->vmcb->save.dbgctl; | |
2715 | break; | |
2716 | case MSR_IA32_LASTBRANCHFROMIP: | |
2717 | *data = svm->vmcb->save.br_from; | |
2718 | break; | |
2719 | case MSR_IA32_LASTBRANCHTOIP: | |
2720 | *data = svm->vmcb->save.br_to; | |
2721 | break; | |
2722 | case MSR_IA32_LASTINTFROMIP: | |
2723 | *data = svm->vmcb->save.last_excp_from; | |
2724 | break; | |
2725 | case MSR_IA32_LASTINTTOIP: | |
2726 | *data = svm->vmcb->save.last_excp_to; | |
2727 | break; | |
b286d5d8 | 2728 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 2729 | *data = svm->nested.hsave_msr; |
b286d5d8 | 2730 | break; |
eb6f302e | 2731 | case MSR_VM_CR: |
4a810181 | 2732 | *data = svm->nested.vm_cr_msr; |
eb6f302e | 2733 | break; |
c8a73f18 AG |
2734 | case MSR_IA32_UCODE_REV: |
2735 | *data = 0x01000065; | |
2736 | break; | |
6aa8b732 | 2737 | default: |
3bab1f5d | 2738 | return kvm_get_msr_common(vcpu, ecx, data); |
6aa8b732 AK |
2739 | } |
2740 | return 0; | |
2741 | } | |
2742 | ||
851ba692 | 2743 | static int rdmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2744 | { |
ad312c7c | 2745 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
6aa8b732 AK |
2746 | u64 data; |
2747 | ||
59200273 AK |
2748 | if (svm_get_msr(&svm->vcpu, ecx, &data)) { |
2749 | trace_kvm_msr_read_ex(ecx); | |
c1a5d4f9 | 2750 | kvm_inject_gp(&svm->vcpu, 0); |
59200273 | 2751 | } else { |
229456fc | 2752 | trace_kvm_msr_read(ecx, data); |
af9ca2d7 | 2753 | |
5fdbf976 | 2754 | svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff; |
ad312c7c | 2755 | svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32; |
5fdbf976 | 2756 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
e756fc62 | 2757 | skip_emulated_instruction(&svm->vcpu); |
6aa8b732 AK |
2758 | } |
2759 | return 1; | |
2760 | } | |
2761 | ||
4a810181 JR |
2762 | static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data) |
2763 | { | |
2764 | struct vcpu_svm *svm = to_svm(vcpu); | |
2765 | int svm_dis, chg_mask; | |
2766 | ||
2767 | if (data & ~SVM_VM_CR_VALID_MASK) | |
2768 | return 1; | |
2769 | ||
2770 | chg_mask = SVM_VM_CR_VALID_MASK; | |
2771 | ||
2772 | if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK) | |
2773 | chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK); | |
2774 | ||
2775 | svm->nested.vm_cr_msr &= ~chg_mask; | |
2776 | svm->nested.vm_cr_msr |= (data & chg_mask); | |
2777 | ||
2778 | svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK; | |
2779 | ||
2780 | /* check for svm_disable while efer.svme is set */ | |
2781 | if (svm_dis && (vcpu->arch.efer & EFER_SVME)) | |
2782 | return 1; | |
2783 | ||
2784 | return 0; | |
2785 | } | |
2786 | ||
6aa8b732 AK |
2787 | static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) |
2788 | { | |
a2fa3e9f GH |
2789 | struct vcpu_svm *svm = to_svm(vcpu); |
2790 | ||
6aa8b732 | 2791 | switch (ecx) { |
f4e1b3c8 | 2792 | case MSR_IA32_TSC: |
99e3e30a | 2793 | kvm_write_tsc(vcpu, data); |
6aa8b732 | 2794 | break; |
8c06585d | 2795 | case MSR_STAR: |
a2fa3e9f | 2796 | svm->vmcb->save.star = data; |
6aa8b732 | 2797 | break; |
49b14f24 | 2798 | #ifdef CONFIG_X86_64 |
6aa8b732 | 2799 | case MSR_LSTAR: |
a2fa3e9f | 2800 | svm->vmcb->save.lstar = data; |
6aa8b732 AK |
2801 | break; |
2802 | case MSR_CSTAR: | |
a2fa3e9f | 2803 | svm->vmcb->save.cstar = data; |
6aa8b732 AK |
2804 | break; |
2805 | case MSR_KERNEL_GS_BASE: | |
a2fa3e9f | 2806 | svm->vmcb->save.kernel_gs_base = data; |
6aa8b732 AK |
2807 | break; |
2808 | case MSR_SYSCALL_MASK: | |
a2fa3e9f | 2809 | svm->vmcb->save.sfmask = data; |
6aa8b732 AK |
2810 | break; |
2811 | #endif | |
2812 | case MSR_IA32_SYSENTER_CS: | |
a2fa3e9f | 2813 | svm->vmcb->save.sysenter_cs = data; |
6aa8b732 AK |
2814 | break; |
2815 | case MSR_IA32_SYSENTER_EIP: | |
017cb99e | 2816 | svm->sysenter_eip = data; |
a2fa3e9f | 2817 | svm->vmcb->save.sysenter_eip = data; |
6aa8b732 AK |
2818 | break; |
2819 | case MSR_IA32_SYSENTER_ESP: | |
017cb99e | 2820 | svm->sysenter_esp = data; |
a2fa3e9f | 2821 | svm->vmcb->save.sysenter_esp = data; |
6aa8b732 | 2822 | break; |
a2938c80 | 2823 | case MSR_IA32_DEBUGCTLMSR: |
2a6b20b8 | 2824 | if (!boot_cpu_has(X86_FEATURE_LBRV)) { |
24e09cbf | 2825 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n", |
b8688d51 | 2826 | __func__, data); |
24e09cbf JR |
2827 | break; |
2828 | } | |
2829 | if (data & DEBUGCTL_RESERVED_BITS) | |
2830 | return 1; | |
2831 | ||
2832 | svm->vmcb->save.dbgctl = data; | |
2833 | if (data & (1ULL<<0)) | |
2834 | svm_enable_lbrv(svm); | |
2835 | else | |
2836 | svm_disable_lbrv(svm); | |
a2938c80 | 2837 | break; |
b286d5d8 | 2838 | case MSR_VM_HSAVE_PA: |
e6aa9abd | 2839 | svm->nested.hsave_msr = data; |
62b9abaa | 2840 | break; |
3c5d0a44 | 2841 | case MSR_VM_CR: |
4a810181 | 2842 | return svm_set_vm_cr(vcpu, data); |
3c5d0a44 | 2843 | case MSR_VM_IGNNE: |
3c5d0a44 AG |
2844 | pr_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data); |
2845 | break; | |
6aa8b732 | 2846 | default: |
3bab1f5d | 2847 | return kvm_set_msr_common(vcpu, ecx, data); |
6aa8b732 AK |
2848 | } |
2849 | return 0; | |
2850 | } | |
2851 | ||
851ba692 | 2852 | static int wrmsr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2853 | { |
ad312c7c | 2854 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; |
5fdbf976 | 2855 | u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u) |
ad312c7c | 2856 | | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32); |
af9ca2d7 | 2857 | |
af9ca2d7 | 2858 | |
5fdbf976 | 2859 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; |
59200273 AK |
2860 | if (svm_set_msr(&svm->vcpu, ecx, data)) { |
2861 | trace_kvm_msr_write_ex(ecx, data); | |
c1a5d4f9 | 2862 | kvm_inject_gp(&svm->vcpu, 0); |
59200273 AK |
2863 | } else { |
2864 | trace_kvm_msr_write(ecx, data); | |
e756fc62 | 2865 | skip_emulated_instruction(&svm->vcpu); |
59200273 | 2866 | } |
6aa8b732 AK |
2867 | return 1; |
2868 | } | |
2869 | ||
851ba692 | 2870 | static int msr_interception(struct vcpu_svm *svm) |
6aa8b732 | 2871 | { |
e756fc62 | 2872 | if (svm->vmcb->control.exit_info_1) |
851ba692 | 2873 | return wrmsr_interception(svm); |
6aa8b732 | 2874 | else |
851ba692 | 2875 | return rdmsr_interception(svm); |
6aa8b732 AK |
2876 | } |
2877 | ||
851ba692 | 2878 | static int interrupt_window_interception(struct vcpu_svm *svm) |
c1150d8c | 2879 | { |
851ba692 AK |
2880 | struct kvm_run *kvm_run = svm->vcpu.run; |
2881 | ||
3842d135 | 2882 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
f0b85051 | 2883 | svm_clear_vintr(svm); |
85f455f7 | 2884 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; |
decdbf6a | 2885 | mark_dirty(svm->vmcb, VMCB_INTR); |
c1150d8c DL |
2886 | /* |
2887 | * If the user space waits to inject interrupts, exit as soon as | |
2888 | * possible | |
2889 | */ | |
8061823a GN |
2890 | if (!irqchip_in_kernel(svm->vcpu.kvm) && |
2891 | kvm_run->request_interrupt_window && | |
2892 | !kvm_cpu_has_interrupt(&svm->vcpu)) { | |
e756fc62 | 2893 | ++svm->vcpu.stat.irq_window_exits; |
c1150d8c DL |
2894 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; |
2895 | return 0; | |
2896 | } | |
2897 | ||
2898 | return 1; | |
2899 | } | |
2900 | ||
565d0998 ML |
2901 | static int pause_interception(struct vcpu_svm *svm) |
2902 | { | |
2903 | kvm_vcpu_on_spin(&(svm->vcpu)); | |
2904 | return 1; | |
2905 | } | |
2906 | ||
851ba692 | 2907 | static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = { |
e0231715 JR |
2908 | [SVM_EXIT_READ_CR0] = emulate_on_interception, |
2909 | [SVM_EXIT_READ_CR3] = emulate_on_interception, | |
2910 | [SVM_EXIT_READ_CR4] = emulate_on_interception, | |
2911 | [SVM_EXIT_READ_CR8] = emulate_on_interception, | |
d225157b | 2912 | [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, |
cda00082 | 2913 | [SVM_EXIT_WRITE_CR0] = cr0_write_interception, |
e0231715 JR |
2914 | [SVM_EXIT_WRITE_CR3] = emulate_on_interception, |
2915 | [SVM_EXIT_WRITE_CR4] = emulate_on_interception, | |
2916 | [SVM_EXIT_WRITE_CR8] = cr8_write_interception, | |
2917 | [SVM_EXIT_READ_DR0] = emulate_on_interception, | |
6aa8b732 AK |
2918 | [SVM_EXIT_READ_DR1] = emulate_on_interception, |
2919 | [SVM_EXIT_READ_DR2] = emulate_on_interception, | |
2920 | [SVM_EXIT_READ_DR3] = emulate_on_interception, | |
727f5a23 JK |
2921 | [SVM_EXIT_READ_DR4] = emulate_on_interception, |
2922 | [SVM_EXIT_READ_DR5] = emulate_on_interception, | |
2923 | [SVM_EXIT_READ_DR6] = emulate_on_interception, | |
2924 | [SVM_EXIT_READ_DR7] = emulate_on_interception, | |
6aa8b732 AK |
2925 | [SVM_EXIT_WRITE_DR0] = emulate_on_interception, |
2926 | [SVM_EXIT_WRITE_DR1] = emulate_on_interception, | |
2927 | [SVM_EXIT_WRITE_DR2] = emulate_on_interception, | |
2928 | [SVM_EXIT_WRITE_DR3] = emulate_on_interception, | |
727f5a23 | 2929 | [SVM_EXIT_WRITE_DR4] = emulate_on_interception, |
6aa8b732 | 2930 | [SVM_EXIT_WRITE_DR5] = emulate_on_interception, |
727f5a23 | 2931 | [SVM_EXIT_WRITE_DR6] = emulate_on_interception, |
6aa8b732 | 2932 | [SVM_EXIT_WRITE_DR7] = emulate_on_interception, |
d0bfb940 JK |
2933 | [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception, |
2934 | [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception, | |
7aa81cc0 | 2935 | [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception, |
e0231715 JR |
2936 | [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, |
2937 | [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, | |
2938 | [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, | |
2939 | [SVM_EXIT_INTR] = intr_interception, | |
c47f098d | 2940 | [SVM_EXIT_NMI] = nmi_interception, |
6aa8b732 AK |
2941 | [SVM_EXIT_SMI] = nop_on_interception, |
2942 | [SVM_EXIT_INIT] = nop_on_interception, | |
c1150d8c | 2943 | [SVM_EXIT_VINTR] = interrupt_window_interception, |
6aa8b732 | 2944 | [SVM_EXIT_CPUID] = cpuid_interception, |
95ba8273 | 2945 | [SVM_EXIT_IRET] = iret_interception, |
cf5a94d1 | 2946 | [SVM_EXIT_INVD] = emulate_on_interception, |
565d0998 | 2947 | [SVM_EXIT_PAUSE] = pause_interception, |
6aa8b732 | 2948 | [SVM_EXIT_HLT] = halt_interception, |
a7052897 | 2949 | [SVM_EXIT_INVLPG] = invlpg_interception, |
ff092385 | 2950 | [SVM_EXIT_INVLPGA] = invlpga_interception, |
e0231715 | 2951 | [SVM_EXIT_IOIO] = io_interception, |
6aa8b732 AK |
2952 | [SVM_EXIT_MSR] = msr_interception, |
2953 | [SVM_EXIT_TASK_SWITCH] = task_switch_interception, | |
46fe4ddd | 2954 | [SVM_EXIT_SHUTDOWN] = shutdown_interception, |
3d6368ef | 2955 | [SVM_EXIT_VMRUN] = vmrun_interception, |
02e235bc | 2956 | [SVM_EXIT_VMMCALL] = vmmcall_interception, |
5542675b AG |
2957 | [SVM_EXIT_VMLOAD] = vmload_interception, |
2958 | [SVM_EXIT_VMSAVE] = vmsave_interception, | |
1371d904 AG |
2959 | [SVM_EXIT_STGI] = stgi_interception, |
2960 | [SVM_EXIT_CLGI] = clgi_interception, | |
532a46b9 | 2961 | [SVM_EXIT_SKINIT] = skinit_interception, |
cf5a94d1 | 2962 | [SVM_EXIT_WBINVD] = emulate_on_interception, |
916ce236 JR |
2963 | [SVM_EXIT_MONITOR] = invalid_op_interception, |
2964 | [SVM_EXIT_MWAIT] = invalid_op_interception, | |
709ddebf | 2965 | [SVM_EXIT_NPF] = pf_interception, |
6aa8b732 AK |
2966 | }; |
2967 | ||
3f10c846 JR |
2968 | void dump_vmcb(struct kvm_vcpu *vcpu) |
2969 | { | |
2970 | struct vcpu_svm *svm = to_svm(vcpu); | |
2971 | struct vmcb_control_area *control = &svm->vmcb->control; | |
2972 | struct vmcb_save_area *save = &svm->vmcb->save; | |
2973 | ||
2974 | pr_err("VMCB Control Area:\n"); | |
4ee546b4 RJ |
2975 | pr_err("cr_read: %04x\n", control->intercept_cr & 0xffff); |
2976 | pr_err("cr_write: %04x\n", control->intercept_cr >> 16); | |
3aed041a JR |
2977 | pr_err("dr_read: %04x\n", control->intercept_dr & 0xffff); |
2978 | pr_err("dr_write: %04x\n", control->intercept_dr >> 16); | |
3f10c846 JR |
2979 | pr_err("exceptions: %08x\n", control->intercept_exceptions); |
2980 | pr_err("intercepts: %016llx\n", control->intercept); | |
2981 | pr_err("pause filter count: %d\n", control->pause_filter_count); | |
2982 | pr_err("iopm_base_pa: %016llx\n", control->iopm_base_pa); | |
2983 | pr_err("msrpm_base_pa: %016llx\n", control->msrpm_base_pa); | |
2984 | pr_err("tsc_offset: %016llx\n", control->tsc_offset); | |
2985 | pr_err("asid: %d\n", control->asid); | |
2986 | pr_err("tlb_ctl: %d\n", control->tlb_ctl); | |
2987 | pr_err("int_ctl: %08x\n", control->int_ctl); | |
2988 | pr_err("int_vector: %08x\n", control->int_vector); | |
2989 | pr_err("int_state: %08x\n", control->int_state); | |
2990 | pr_err("exit_code: %08x\n", control->exit_code); | |
2991 | pr_err("exit_info1: %016llx\n", control->exit_info_1); | |
2992 | pr_err("exit_info2: %016llx\n", control->exit_info_2); | |
2993 | pr_err("exit_int_info: %08x\n", control->exit_int_info); | |
2994 | pr_err("exit_int_info_err: %08x\n", control->exit_int_info_err); | |
2995 | pr_err("nested_ctl: %lld\n", control->nested_ctl); | |
2996 | pr_err("nested_cr3: %016llx\n", control->nested_cr3); | |
2997 | pr_err("event_inj: %08x\n", control->event_inj); | |
2998 | pr_err("event_inj_err: %08x\n", control->event_inj_err); | |
2999 | pr_err("lbr_ctl: %lld\n", control->lbr_ctl); | |
3000 | pr_err("next_rip: %016llx\n", control->next_rip); | |
3001 | pr_err("VMCB State Save Area:\n"); | |
3002 | pr_err("es: s: %04x a: %04x l: %08x b: %016llx\n", | |
3003 | save->es.selector, save->es.attrib, | |
3004 | save->es.limit, save->es.base); | |
3005 | pr_err("cs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3006 | save->cs.selector, save->cs.attrib, | |
3007 | save->cs.limit, save->cs.base); | |
3008 | pr_err("ss: s: %04x a: %04x l: %08x b: %016llx\n", | |
3009 | save->ss.selector, save->ss.attrib, | |
3010 | save->ss.limit, save->ss.base); | |
3011 | pr_err("ds: s: %04x a: %04x l: %08x b: %016llx\n", | |
3012 | save->ds.selector, save->ds.attrib, | |
3013 | save->ds.limit, save->ds.base); | |
3014 | pr_err("fs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3015 | save->fs.selector, save->fs.attrib, | |
3016 | save->fs.limit, save->fs.base); | |
3017 | pr_err("gs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3018 | save->gs.selector, save->gs.attrib, | |
3019 | save->gs.limit, save->gs.base); | |
3020 | pr_err("gdtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3021 | save->gdtr.selector, save->gdtr.attrib, | |
3022 | save->gdtr.limit, save->gdtr.base); | |
3023 | pr_err("ldtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3024 | save->ldtr.selector, save->ldtr.attrib, | |
3025 | save->ldtr.limit, save->ldtr.base); | |
3026 | pr_err("idtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3027 | save->idtr.selector, save->idtr.attrib, | |
3028 | save->idtr.limit, save->idtr.base); | |
3029 | pr_err("tr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3030 | save->tr.selector, save->tr.attrib, | |
3031 | save->tr.limit, save->tr.base); | |
3032 | pr_err("cpl: %d efer: %016llx\n", | |
3033 | save->cpl, save->efer); | |
3034 | pr_err("cr0: %016llx cr2: %016llx\n", | |
3035 | save->cr0, save->cr2); | |
3036 | pr_err("cr3: %016llx cr4: %016llx\n", | |
3037 | save->cr3, save->cr4); | |
3038 | pr_err("dr6: %016llx dr7: %016llx\n", | |
3039 | save->dr6, save->dr7); | |
3040 | pr_err("rip: %016llx rflags: %016llx\n", | |
3041 | save->rip, save->rflags); | |
3042 | pr_err("rsp: %016llx rax: %016llx\n", | |
3043 | save->rsp, save->rax); | |
3044 | pr_err("star: %016llx lstar: %016llx\n", | |
3045 | save->star, save->lstar); | |
3046 | pr_err("cstar: %016llx sfmask: %016llx\n", | |
3047 | save->cstar, save->sfmask); | |
3048 | pr_err("kernel_gs_base: %016llx sysenter_cs: %016llx\n", | |
3049 | save->kernel_gs_base, save->sysenter_cs); | |
3050 | pr_err("sysenter_esp: %016llx sysenter_eip: %016llx\n", | |
3051 | save->sysenter_esp, save->sysenter_eip); | |
3052 | pr_err("gpat: %016llx dbgctl: %016llx\n", | |
3053 | save->g_pat, save->dbgctl); | |
3054 | pr_err("br_from: %016llx br_to: %016llx\n", | |
3055 | save->br_from, save->br_to); | |
3056 | pr_err("excp_from: %016llx excp_to: %016llx\n", | |
3057 | save->last_excp_from, save->last_excp_to); | |
3058 | ||
3059 | } | |
3060 | ||
586f9607 AK |
3061 | static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) |
3062 | { | |
3063 | struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control; | |
3064 | ||
3065 | *info1 = control->exit_info_1; | |
3066 | *info2 = control->exit_info_2; | |
3067 | } | |
3068 | ||
851ba692 | 3069 | static int handle_exit(struct kvm_vcpu *vcpu) |
6aa8b732 | 3070 | { |
04d2cc77 | 3071 | struct vcpu_svm *svm = to_svm(vcpu); |
851ba692 | 3072 | struct kvm_run *kvm_run = vcpu->run; |
a2fa3e9f | 3073 | u32 exit_code = svm->vmcb->control.exit_code; |
6aa8b732 | 3074 | |
aa17911e | 3075 | trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM); |
af9ca2d7 | 3076 | |
4ee546b4 | 3077 | if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE)) |
2be4fc7a JR |
3078 | vcpu->arch.cr0 = svm->vmcb->save.cr0; |
3079 | if (npt_enabled) | |
3080 | vcpu->arch.cr3 = svm->vmcb->save.cr3; | |
af9ca2d7 | 3081 | |
cd3ff653 JR |
3082 | if (unlikely(svm->nested.exit_required)) { |
3083 | nested_svm_vmexit(svm); | |
3084 | svm->nested.exit_required = false; | |
3085 | ||
3086 | return 1; | |
3087 | } | |
3088 | ||
2030753d | 3089 | if (is_guest_mode(vcpu)) { |
410e4d57 JR |
3090 | int vmexit; |
3091 | ||
d8cabddf JR |
3092 | trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code, |
3093 | svm->vmcb->control.exit_info_1, | |
3094 | svm->vmcb->control.exit_info_2, | |
3095 | svm->vmcb->control.exit_int_info, | |
3096 | svm->vmcb->control.exit_int_info_err); | |
3097 | ||
410e4d57 JR |
3098 | vmexit = nested_svm_exit_special(svm); |
3099 | ||
3100 | if (vmexit == NESTED_EXIT_CONTINUE) | |
3101 | vmexit = nested_svm_exit_handled(svm); | |
3102 | ||
3103 | if (vmexit == NESTED_EXIT_DONE) | |
cf74a78b | 3104 | return 1; |
cf74a78b AG |
3105 | } |
3106 | ||
a5c3832d JR |
3107 | svm_complete_interrupts(svm); |
3108 | ||
04d2cc77 AK |
3109 | if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) { |
3110 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
3111 | kvm_run->fail_entry.hardware_entry_failure_reason | |
3112 | = svm->vmcb->control.exit_code; | |
3f10c846 JR |
3113 | pr_err("KVM: FAILED VMRUN WITH VMCB:\n"); |
3114 | dump_vmcb(vcpu); | |
04d2cc77 AK |
3115 | return 0; |
3116 | } | |
3117 | ||
a2fa3e9f | 3118 | if (is_external_interrupt(svm->vmcb->control.exit_int_info) && |
709ddebf | 3119 | exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR && |
55c5e464 JR |
3120 | exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH && |
3121 | exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI) | |
6aa8b732 AK |
3122 | printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x " |
3123 | "exit_code 0x%x\n", | |
b8688d51 | 3124 | __func__, svm->vmcb->control.exit_int_info, |
6aa8b732 AK |
3125 | exit_code); |
3126 | ||
9d8f549d | 3127 | if (exit_code >= ARRAY_SIZE(svm_exit_handlers) |
56919c5c | 3128 | || !svm_exit_handlers[exit_code]) { |
6aa8b732 | 3129 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; |
364b625b | 3130 | kvm_run->hw.hardware_exit_reason = exit_code; |
6aa8b732 AK |
3131 | return 0; |
3132 | } | |
3133 | ||
851ba692 | 3134 | return svm_exit_handlers[exit_code](svm); |
6aa8b732 AK |
3135 | } |
3136 | ||
3137 | static void reload_tss(struct kvm_vcpu *vcpu) | |
3138 | { | |
3139 | int cpu = raw_smp_processor_id(); | |
3140 | ||
0fe1e009 TH |
3141 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
3142 | sd->tss_desc->type = 9; /* available 32/64-bit TSS */ | |
6aa8b732 AK |
3143 | load_TR_desc(); |
3144 | } | |
3145 | ||
e756fc62 | 3146 | static void pre_svm_run(struct vcpu_svm *svm) |
6aa8b732 AK |
3147 | { |
3148 | int cpu = raw_smp_processor_id(); | |
3149 | ||
0fe1e009 | 3150 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); |
6aa8b732 | 3151 | |
a2fa3e9f | 3152 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; |
4b656b12 | 3153 | /* FIXME: handle wraparound of asid_generation */ |
0fe1e009 TH |
3154 | if (svm->asid_generation != sd->asid_generation) |
3155 | new_asid(svm, sd); | |
6aa8b732 AK |
3156 | } |
3157 | ||
95ba8273 GN |
3158 | static void svm_inject_nmi(struct kvm_vcpu *vcpu) |
3159 | { | |
3160 | struct vcpu_svm *svm = to_svm(vcpu); | |
3161 | ||
3162 | svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; | |
3163 | vcpu->arch.hflags |= HF_NMI_MASK; | |
8a05a1b8 | 3164 | set_intercept(svm, INTERCEPT_IRET); |
95ba8273 GN |
3165 | ++vcpu->stat.nmi_injections; |
3166 | } | |
6aa8b732 | 3167 | |
85f455f7 | 3168 | static inline void svm_inject_irq(struct vcpu_svm *svm, int irq) |
6aa8b732 AK |
3169 | { |
3170 | struct vmcb_control_area *control; | |
3171 | ||
e756fc62 | 3172 | control = &svm->vmcb->control; |
85f455f7 | 3173 | control->int_vector = irq; |
6aa8b732 AK |
3174 | control->int_ctl &= ~V_INTR_PRIO_MASK; |
3175 | control->int_ctl |= V_IRQ_MASK | | |
3176 | ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT); | |
decdbf6a | 3177 | mark_dirty(svm->vmcb, VMCB_INTR); |
6aa8b732 AK |
3178 | } |
3179 | ||
66fd3f7f | 3180 | static void svm_set_irq(struct kvm_vcpu *vcpu) |
2a8067f1 ED |
3181 | { |
3182 | struct vcpu_svm *svm = to_svm(vcpu); | |
3183 | ||
2af9194d | 3184 | BUG_ON(!(gif_set(svm))); |
cf74a78b | 3185 | |
9fb2d2b4 GN |
3186 | trace_kvm_inj_virq(vcpu->arch.interrupt.nr); |
3187 | ++vcpu->stat.irq_injections; | |
3188 | ||
219b65dc AG |
3189 | svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr | |
3190 | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR; | |
2a8067f1 ED |
3191 | } |
3192 | ||
95ba8273 | 3193 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) |
aaacfc9a JR |
3194 | { |
3195 | struct vcpu_svm *svm = to_svm(vcpu); | |
aaacfc9a | 3196 | |
2030753d | 3197 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) |
88ab24ad JR |
3198 | return; |
3199 | ||
95ba8273 | 3200 | if (irr == -1) |
aaacfc9a JR |
3201 | return; |
3202 | ||
95ba8273 | 3203 | if (tpr >= irr) |
4ee546b4 | 3204 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); |
95ba8273 | 3205 | } |
aaacfc9a | 3206 | |
95ba8273 GN |
3207 | static int svm_nmi_allowed(struct kvm_vcpu *vcpu) |
3208 | { | |
3209 | struct vcpu_svm *svm = to_svm(vcpu); | |
3210 | struct vmcb *vmcb = svm->vmcb; | |
924584cc JR |
3211 | int ret; |
3212 | ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) && | |
3213 | !(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
3214 | ret = ret && gif_set(svm) && nested_svm_nmi(svm); | |
3215 | ||
3216 | return ret; | |
aaacfc9a JR |
3217 | } |
3218 | ||
3cfc3092 JK |
3219 | static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu) |
3220 | { | |
3221 | struct vcpu_svm *svm = to_svm(vcpu); | |
3222 | ||
3223 | return !!(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
3224 | } | |
3225 | ||
3226 | static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
3227 | { | |
3228 | struct vcpu_svm *svm = to_svm(vcpu); | |
3229 | ||
3230 | if (masked) { | |
3231 | svm->vcpu.arch.hflags |= HF_NMI_MASK; | |
8a05a1b8 | 3232 | set_intercept(svm, INTERCEPT_IRET); |
3cfc3092 JK |
3233 | } else { |
3234 | svm->vcpu.arch.hflags &= ~HF_NMI_MASK; | |
8a05a1b8 | 3235 | clr_intercept(svm, INTERCEPT_IRET); |
3cfc3092 JK |
3236 | } |
3237 | } | |
3238 | ||
78646121 GN |
3239 | static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) |
3240 | { | |
3241 | struct vcpu_svm *svm = to_svm(vcpu); | |
3242 | struct vmcb *vmcb = svm->vmcb; | |
7fcdb510 JR |
3243 | int ret; |
3244 | ||
3245 | if (!gif_set(svm) || | |
3246 | (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)) | |
3247 | return 0; | |
3248 | ||
3249 | ret = !!(vmcb->save.rflags & X86_EFLAGS_IF); | |
3250 | ||
2030753d | 3251 | if (is_guest_mode(vcpu)) |
7fcdb510 JR |
3252 | return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK); |
3253 | ||
3254 | return ret; | |
78646121 GN |
3255 | } |
3256 | ||
9222be18 | 3257 | static void enable_irq_window(struct kvm_vcpu *vcpu) |
6aa8b732 | 3258 | { |
219b65dc | 3259 | struct vcpu_svm *svm = to_svm(vcpu); |
219b65dc | 3260 | |
e0231715 JR |
3261 | /* |
3262 | * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes | |
3263 | * 1, because that's a separate STGI/VMRUN intercept. The next time we | |
3264 | * get that intercept, this function will be called again though and | |
3265 | * we'll get the vintr intercept. | |
3266 | */ | |
8fe54654 | 3267 | if (gif_set(svm) && nested_svm_intr(svm)) { |
219b65dc AG |
3268 | svm_set_vintr(svm); |
3269 | svm_inject_irq(svm, 0x0); | |
3270 | } | |
85f455f7 ED |
3271 | } |
3272 | ||
95ba8273 | 3273 | static void enable_nmi_window(struct kvm_vcpu *vcpu) |
c1150d8c | 3274 | { |
04d2cc77 | 3275 | struct vcpu_svm *svm = to_svm(vcpu); |
c1150d8c | 3276 | |
44c11430 GN |
3277 | if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) |
3278 | == HF_NMI_MASK) | |
3279 | return; /* IRET will cause a vm exit */ | |
3280 | ||
e0231715 JR |
3281 | /* |
3282 | * Something prevents NMI from been injected. Single step over possible | |
3283 | * problem (IRET or exception injection or interrupt shadow) | |
3284 | */ | |
6be7d306 | 3285 | svm->nmi_singlestep = true; |
44c11430 GN |
3286 | svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF); |
3287 | update_db_intercept(vcpu); | |
c1150d8c DL |
3288 | } |
3289 | ||
cbc94022 IE |
3290 | static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr) |
3291 | { | |
3292 | return 0; | |
3293 | } | |
3294 | ||
d9e368d6 AK |
3295 | static void svm_flush_tlb(struct kvm_vcpu *vcpu) |
3296 | { | |
3297 | force_new_asid(vcpu); | |
3298 | } | |
3299 | ||
04d2cc77 AK |
3300 | static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu) |
3301 | { | |
3302 | } | |
3303 | ||
d7bf8221 JR |
3304 | static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) |
3305 | { | |
3306 | struct vcpu_svm *svm = to_svm(vcpu); | |
3307 | ||
2030753d | 3308 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) |
88ab24ad JR |
3309 | return; |
3310 | ||
4ee546b4 | 3311 | if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) { |
d7bf8221 | 3312 | int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK; |
615d5193 | 3313 | kvm_set_cr8(vcpu, cr8); |
d7bf8221 JR |
3314 | } |
3315 | } | |
3316 | ||
649d6864 JR |
3317 | static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) |
3318 | { | |
3319 | struct vcpu_svm *svm = to_svm(vcpu); | |
3320 | u64 cr8; | |
3321 | ||
2030753d | 3322 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) |
88ab24ad JR |
3323 | return; |
3324 | ||
649d6864 JR |
3325 | cr8 = kvm_get_cr8(vcpu); |
3326 | svm->vmcb->control.int_ctl &= ~V_TPR_MASK; | |
3327 | svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK; | |
3328 | } | |
3329 | ||
9222be18 GN |
3330 | static void svm_complete_interrupts(struct vcpu_svm *svm) |
3331 | { | |
3332 | u8 vector; | |
3333 | int type; | |
3334 | u32 exitintinfo = svm->vmcb->control.exit_int_info; | |
66b7138f JK |
3335 | unsigned int3_injected = svm->int3_injected; |
3336 | ||
3337 | svm->int3_injected = 0; | |
9222be18 | 3338 | |
3842d135 | 3339 | if (svm->vcpu.arch.hflags & HF_IRET_MASK) { |
44c11430 | 3340 | svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK); |
3842d135 AK |
3341 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
3342 | } | |
44c11430 | 3343 | |
9222be18 GN |
3344 | svm->vcpu.arch.nmi_injected = false; |
3345 | kvm_clear_exception_queue(&svm->vcpu); | |
3346 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3347 | ||
3348 | if (!(exitintinfo & SVM_EXITINTINFO_VALID)) | |
3349 | return; | |
3350 | ||
3842d135 AK |
3351 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); |
3352 | ||
9222be18 GN |
3353 | vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK; |
3354 | type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK; | |
3355 | ||
3356 | switch (type) { | |
3357 | case SVM_EXITINTINFO_TYPE_NMI: | |
3358 | svm->vcpu.arch.nmi_injected = true; | |
3359 | break; | |
3360 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
66b7138f JK |
3361 | /* |
3362 | * In case of software exceptions, do not reinject the vector, | |
3363 | * but re-execute the instruction instead. Rewind RIP first | |
3364 | * if we emulated INT3 before. | |
3365 | */ | |
3366 | if (kvm_exception_is_soft(vector)) { | |
3367 | if (vector == BP_VECTOR && int3_injected && | |
3368 | kvm_is_linear_rip(&svm->vcpu, svm->int3_rip)) | |
3369 | kvm_rip_write(&svm->vcpu, | |
3370 | kvm_rip_read(&svm->vcpu) - | |
3371 | int3_injected); | |
9222be18 | 3372 | break; |
66b7138f | 3373 | } |
9222be18 GN |
3374 | if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) { |
3375 | u32 err = svm->vmcb->control.exit_int_info_err; | |
ce7ddec4 | 3376 | kvm_requeue_exception_e(&svm->vcpu, vector, err); |
9222be18 GN |
3377 | |
3378 | } else | |
ce7ddec4 | 3379 | kvm_requeue_exception(&svm->vcpu, vector); |
9222be18 GN |
3380 | break; |
3381 | case SVM_EXITINTINFO_TYPE_INTR: | |
66fd3f7f | 3382 | kvm_queue_interrupt(&svm->vcpu, vector, false); |
9222be18 GN |
3383 | break; |
3384 | default: | |
3385 | break; | |
3386 | } | |
3387 | } | |
3388 | ||
b463a6f7 AK |
3389 | static void svm_cancel_injection(struct kvm_vcpu *vcpu) |
3390 | { | |
3391 | struct vcpu_svm *svm = to_svm(vcpu); | |
3392 | struct vmcb_control_area *control = &svm->vmcb->control; | |
3393 | ||
3394 | control->exit_int_info = control->event_inj; | |
3395 | control->exit_int_info_err = control->event_inj_err; | |
3396 | control->event_inj = 0; | |
3397 | svm_complete_interrupts(svm); | |
3398 | } | |
3399 | ||
80e31d4f AK |
3400 | #ifdef CONFIG_X86_64 |
3401 | #define R "r" | |
3402 | #else | |
3403 | #define R "e" | |
3404 | #endif | |
3405 | ||
851ba692 | 3406 | static void svm_vcpu_run(struct kvm_vcpu *vcpu) |
6aa8b732 | 3407 | { |
a2fa3e9f | 3408 | struct vcpu_svm *svm = to_svm(vcpu); |
d9e368d6 | 3409 | |
2041a06a JR |
3410 | svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX]; |
3411 | svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP]; | |
3412 | svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP]; | |
3413 | ||
cd3ff653 JR |
3414 | /* |
3415 | * A vmexit emulation is required before the vcpu can be executed | |
3416 | * again. | |
3417 | */ | |
3418 | if (unlikely(svm->nested.exit_required)) | |
3419 | return; | |
3420 | ||
e756fc62 | 3421 | pre_svm_run(svm); |
6aa8b732 | 3422 | |
649d6864 JR |
3423 | sync_lapic_to_cr8(vcpu); |
3424 | ||
cda0ffdd | 3425 | svm->vmcb->save.cr2 = vcpu->arch.cr2; |
6aa8b732 | 3426 | |
04d2cc77 AK |
3427 | clgi(); |
3428 | ||
3429 | local_irq_enable(); | |
36241b8c | 3430 | |
6aa8b732 | 3431 | asm volatile ( |
80e31d4f AK |
3432 | "push %%"R"bp; \n\t" |
3433 | "mov %c[rbx](%[svm]), %%"R"bx \n\t" | |
3434 | "mov %c[rcx](%[svm]), %%"R"cx \n\t" | |
3435 | "mov %c[rdx](%[svm]), %%"R"dx \n\t" | |
3436 | "mov %c[rsi](%[svm]), %%"R"si \n\t" | |
3437 | "mov %c[rdi](%[svm]), %%"R"di \n\t" | |
3438 | "mov %c[rbp](%[svm]), %%"R"bp \n\t" | |
05b3e0c2 | 3439 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
3440 | "mov %c[r8](%[svm]), %%r8 \n\t" |
3441 | "mov %c[r9](%[svm]), %%r9 \n\t" | |
3442 | "mov %c[r10](%[svm]), %%r10 \n\t" | |
3443 | "mov %c[r11](%[svm]), %%r11 \n\t" | |
3444 | "mov %c[r12](%[svm]), %%r12 \n\t" | |
3445 | "mov %c[r13](%[svm]), %%r13 \n\t" | |
3446 | "mov %c[r14](%[svm]), %%r14 \n\t" | |
3447 | "mov %c[r15](%[svm]), %%r15 \n\t" | |
6aa8b732 AK |
3448 | #endif |
3449 | ||
6aa8b732 | 3450 | /* Enter guest mode */ |
80e31d4f AK |
3451 | "push %%"R"ax \n\t" |
3452 | "mov %c[vmcb](%[svm]), %%"R"ax \n\t" | |
4ecac3fd AK |
3453 | __ex(SVM_VMLOAD) "\n\t" |
3454 | __ex(SVM_VMRUN) "\n\t" | |
3455 | __ex(SVM_VMSAVE) "\n\t" | |
80e31d4f | 3456 | "pop %%"R"ax \n\t" |
6aa8b732 AK |
3457 | |
3458 | /* Save guest registers, load host registers */ | |
80e31d4f AK |
3459 | "mov %%"R"bx, %c[rbx](%[svm]) \n\t" |
3460 | "mov %%"R"cx, %c[rcx](%[svm]) \n\t" | |
3461 | "mov %%"R"dx, %c[rdx](%[svm]) \n\t" | |
3462 | "mov %%"R"si, %c[rsi](%[svm]) \n\t" | |
3463 | "mov %%"R"di, %c[rdi](%[svm]) \n\t" | |
3464 | "mov %%"R"bp, %c[rbp](%[svm]) \n\t" | |
05b3e0c2 | 3465 | #ifdef CONFIG_X86_64 |
fb3f0f51 RR |
3466 | "mov %%r8, %c[r8](%[svm]) \n\t" |
3467 | "mov %%r9, %c[r9](%[svm]) \n\t" | |
3468 | "mov %%r10, %c[r10](%[svm]) \n\t" | |
3469 | "mov %%r11, %c[r11](%[svm]) \n\t" | |
3470 | "mov %%r12, %c[r12](%[svm]) \n\t" | |
3471 | "mov %%r13, %c[r13](%[svm]) \n\t" | |
3472 | "mov %%r14, %c[r14](%[svm]) \n\t" | |
3473 | "mov %%r15, %c[r15](%[svm]) \n\t" | |
6aa8b732 | 3474 | #endif |
80e31d4f | 3475 | "pop %%"R"bp" |
6aa8b732 | 3476 | : |
fb3f0f51 | 3477 | : [svm]"a"(svm), |
6aa8b732 | 3478 | [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)), |
ad312c7c ZX |
3479 | [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])), |
3480 | [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])), | |
3481 | [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])), | |
3482 | [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])), | |
3483 | [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])), | |
3484 | [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP])) | |
05b3e0c2 | 3485 | #ifdef CONFIG_X86_64 |
ad312c7c ZX |
3486 | , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])), |
3487 | [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])), | |
3488 | [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])), | |
3489 | [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])), | |
3490 | [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])), | |
3491 | [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])), | |
3492 | [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])), | |
3493 | [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15])) | |
6aa8b732 | 3494 | #endif |
54a08c04 | 3495 | : "cc", "memory" |
80e31d4f | 3496 | , R"bx", R"cx", R"dx", R"si", R"di" |
54a08c04 | 3497 | #ifdef CONFIG_X86_64 |
54a08c04 LV |
3498 | , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15" |
3499 | #endif | |
3500 | ); | |
6aa8b732 | 3501 | |
82ca2d10 AK |
3502 | #ifdef CONFIG_X86_64 |
3503 | wrmsrl(MSR_GS_BASE, svm->host.gs_base); | |
3504 | #else | |
dacccfdd | 3505 | loadsegment(fs, svm->host.fs); |
9581d442 | 3506 | #endif |
6aa8b732 AK |
3507 | |
3508 | reload_tss(vcpu); | |
3509 | ||
56ba47dd AK |
3510 | local_irq_disable(); |
3511 | ||
3512 | stgi(); | |
3513 | ||
13c34e07 AK |
3514 | vcpu->arch.cr2 = svm->vmcb->save.cr2; |
3515 | vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax; | |
3516 | vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp; | |
3517 | vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip; | |
3518 | ||
d7bf8221 JR |
3519 | sync_cr8_to_lapic(vcpu); |
3520 | ||
a2fa3e9f | 3521 | svm->next_rip = 0; |
9222be18 | 3522 | |
631bc487 GN |
3523 | /* if exit due to PF check for async PF */ |
3524 | if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) | |
3525 | svm->apf_reason = kvm_read_and_reset_pf_reason(); | |
3526 | ||
6de4f3ad AK |
3527 | if (npt_enabled) { |
3528 | vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); | |
3529 | vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); | |
3530 | } | |
fe5913e4 JR |
3531 | |
3532 | /* | |
3533 | * We need to handle MC intercepts here before the vcpu has a chance to | |
3534 | * change the physical cpu | |
3535 | */ | |
3536 | if (unlikely(svm->vmcb->control.exit_code == | |
3537 | SVM_EXIT_EXCP_BASE + MC_VECTOR)) | |
3538 | svm_handle_mce(svm); | |
8d28fec4 RJ |
3539 | |
3540 | mark_all_clean(svm->vmcb); | |
6aa8b732 AK |
3541 | } |
3542 | ||
80e31d4f AK |
3543 | #undef R |
3544 | ||
6aa8b732 AK |
3545 | static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
3546 | { | |
a2fa3e9f GH |
3547 | struct vcpu_svm *svm = to_svm(vcpu); |
3548 | ||
3549 | svm->vmcb->save.cr3 = root; | |
6aa8b732 AK |
3550 | force_new_asid(vcpu); |
3551 | } | |
3552 | ||
1c97f0a0 JR |
3553 | static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root) |
3554 | { | |
3555 | struct vcpu_svm *svm = to_svm(vcpu); | |
3556 | ||
3557 | svm->vmcb->control.nested_cr3 = root; | |
3558 | ||
3559 | /* Also sync guest cr3 here in case we live migrate */ | |
3560 | svm->vmcb->save.cr3 = vcpu->arch.cr3; | |
3561 | ||
3562 | force_new_asid(vcpu); | |
3563 | } | |
3564 | ||
6aa8b732 AK |
3565 | static int is_disabled(void) |
3566 | { | |
6031a61c JR |
3567 | u64 vm_cr; |
3568 | ||
3569 | rdmsrl(MSR_VM_CR, vm_cr); | |
3570 | if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE)) | |
3571 | return 1; | |
3572 | ||
6aa8b732 AK |
3573 | return 0; |
3574 | } | |
3575 | ||
102d8325 IM |
3576 | static void |
3577 | svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
3578 | { | |
3579 | /* | |
3580 | * Patch in the VMMCALL instruction: | |
3581 | */ | |
3582 | hypercall[0] = 0x0f; | |
3583 | hypercall[1] = 0x01; | |
3584 | hypercall[2] = 0xd9; | |
102d8325 IM |
3585 | } |
3586 | ||
002c7f7c YS |
3587 | static void svm_check_processor_compat(void *rtn) |
3588 | { | |
3589 | *(int *)rtn = 0; | |
3590 | } | |
3591 | ||
774ead3a AK |
3592 | static bool svm_cpu_has_accelerated_tpr(void) |
3593 | { | |
3594 | return false; | |
3595 | } | |
3596 | ||
4b12f0de | 3597 | static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) |
64d4d521 SY |
3598 | { |
3599 | return 0; | |
3600 | } | |
3601 | ||
0e851880 SY |
3602 | static void svm_cpuid_update(struct kvm_vcpu *vcpu) |
3603 | { | |
3604 | } | |
3605 | ||
d4330ef2 JR |
3606 | static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) |
3607 | { | |
c2c63a49 | 3608 | switch (func) { |
24d1b15f JR |
3609 | case 0x00000001: |
3610 | /* Mask out xsave bit as long as it is not supported by SVM */ | |
3611 | entry->ecx &= ~(bit(X86_FEATURE_XSAVE)); | |
3612 | break; | |
4c62a2dc JR |
3613 | case 0x80000001: |
3614 | if (nested) | |
3615 | entry->ecx |= (1 << 2); /* Set SVM bit */ | |
3616 | break; | |
c2c63a49 JR |
3617 | case 0x8000000A: |
3618 | entry->eax = 1; /* SVM revision 1 */ | |
3619 | entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper | |
3620 | ASID emulation to nested SVM */ | |
3621 | entry->ecx = 0; /* Reserved */ | |
7a190667 JR |
3622 | entry->edx = 0; /* Per default do not support any |
3623 | additional features */ | |
3624 | ||
3625 | /* Support next_rip if host supports it */ | |
2a6b20b8 | 3626 | if (boot_cpu_has(X86_FEATURE_NRIPS)) |
7a190667 | 3627 | entry->edx |= SVM_FEATURE_NRIP; |
c2c63a49 | 3628 | |
3d4aeaad JR |
3629 | /* Support NPT for the guest if enabled */ |
3630 | if (npt_enabled) | |
3631 | entry->edx |= SVM_FEATURE_NPT; | |
3632 | ||
c2c63a49 JR |
3633 | break; |
3634 | } | |
d4330ef2 JR |
3635 | } |
3636 | ||
229456fc | 3637 | static const struct trace_print_flags svm_exit_reasons_str[] = { |
e0231715 JR |
3638 | { SVM_EXIT_READ_CR0, "read_cr0" }, |
3639 | { SVM_EXIT_READ_CR3, "read_cr3" }, | |
3640 | { SVM_EXIT_READ_CR4, "read_cr4" }, | |
3641 | { SVM_EXIT_READ_CR8, "read_cr8" }, | |
3642 | { SVM_EXIT_WRITE_CR0, "write_cr0" }, | |
3643 | { SVM_EXIT_WRITE_CR3, "write_cr3" }, | |
3644 | { SVM_EXIT_WRITE_CR4, "write_cr4" }, | |
3645 | { SVM_EXIT_WRITE_CR8, "write_cr8" }, | |
3646 | { SVM_EXIT_READ_DR0, "read_dr0" }, | |
3647 | { SVM_EXIT_READ_DR1, "read_dr1" }, | |
3648 | { SVM_EXIT_READ_DR2, "read_dr2" }, | |
3649 | { SVM_EXIT_READ_DR3, "read_dr3" }, | |
3650 | { SVM_EXIT_WRITE_DR0, "write_dr0" }, | |
3651 | { SVM_EXIT_WRITE_DR1, "write_dr1" }, | |
3652 | { SVM_EXIT_WRITE_DR2, "write_dr2" }, | |
3653 | { SVM_EXIT_WRITE_DR3, "write_dr3" }, | |
3654 | { SVM_EXIT_WRITE_DR5, "write_dr5" }, | |
3655 | { SVM_EXIT_WRITE_DR7, "write_dr7" }, | |
229456fc MT |
3656 | { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, |
3657 | { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, | |
3658 | { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, | |
3659 | { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, | |
3660 | { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, | |
3661 | { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, | |
3662 | { SVM_EXIT_INTR, "interrupt" }, | |
3663 | { SVM_EXIT_NMI, "nmi" }, | |
3664 | { SVM_EXIT_SMI, "smi" }, | |
3665 | { SVM_EXIT_INIT, "init" }, | |
3666 | { SVM_EXIT_VINTR, "vintr" }, | |
3667 | { SVM_EXIT_CPUID, "cpuid" }, | |
3668 | { SVM_EXIT_INVD, "invd" }, | |
3669 | { SVM_EXIT_HLT, "hlt" }, | |
3670 | { SVM_EXIT_INVLPG, "invlpg" }, | |
3671 | { SVM_EXIT_INVLPGA, "invlpga" }, | |
3672 | { SVM_EXIT_IOIO, "io" }, | |
3673 | { SVM_EXIT_MSR, "msr" }, | |
3674 | { SVM_EXIT_TASK_SWITCH, "task_switch" }, | |
3675 | { SVM_EXIT_SHUTDOWN, "shutdown" }, | |
3676 | { SVM_EXIT_VMRUN, "vmrun" }, | |
3677 | { SVM_EXIT_VMMCALL, "hypercall" }, | |
3678 | { SVM_EXIT_VMLOAD, "vmload" }, | |
3679 | { SVM_EXIT_VMSAVE, "vmsave" }, | |
3680 | { SVM_EXIT_STGI, "stgi" }, | |
3681 | { SVM_EXIT_CLGI, "clgi" }, | |
3682 | { SVM_EXIT_SKINIT, "skinit" }, | |
3683 | { SVM_EXIT_WBINVD, "wbinvd" }, | |
3684 | { SVM_EXIT_MONITOR, "monitor" }, | |
3685 | { SVM_EXIT_MWAIT, "mwait" }, | |
3686 | { SVM_EXIT_NPF, "npf" }, | |
3687 | { -1, NULL } | |
3688 | }; | |
3689 | ||
17cc3935 | 3690 | static int svm_get_lpage_level(void) |
344f414f | 3691 | { |
17cc3935 | 3692 | return PT_PDPE_LEVEL; |
344f414f JR |
3693 | } |
3694 | ||
4e47c7a6 SY |
3695 | static bool svm_rdtscp_supported(void) |
3696 | { | |
3697 | return false; | |
3698 | } | |
3699 | ||
f5f48ee1 SY |
3700 | static bool svm_has_wbinvd_exit(void) |
3701 | { | |
3702 | return true; | |
3703 | } | |
3704 | ||
02daab21 AK |
3705 | static void svm_fpu_deactivate(struct kvm_vcpu *vcpu) |
3706 | { | |
3707 | struct vcpu_svm *svm = to_svm(vcpu); | |
3708 | ||
18c918c5 | 3709 | set_exception_intercept(svm, NM_VECTOR); |
66a562f7 | 3710 | update_cr0_intercept(svm); |
02daab21 AK |
3711 | } |
3712 | ||
cbdd1bea | 3713 | static struct kvm_x86_ops svm_x86_ops = { |
6aa8b732 AK |
3714 | .cpu_has_kvm_support = has_svm, |
3715 | .disabled_by_bios = is_disabled, | |
3716 | .hardware_setup = svm_hardware_setup, | |
3717 | .hardware_unsetup = svm_hardware_unsetup, | |
002c7f7c | 3718 | .check_processor_compatibility = svm_check_processor_compat, |
6aa8b732 AK |
3719 | .hardware_enable = svm_hardware_enable, |
3720 | .hardware_disable = svm_hardware_disable, | |
774ead3a | 3721 | .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr, |
6aa8b732 AK |
3722 | |
3723 | .vcpu_create = svm_create_vcpu, | |
3724 | .vcpu_free = svm_free_vcpu, | |
04d2cc77 | 3725 | .vcpu_reset = svm_vcpu_reset, |
6aa8b732 | 3726 | |
04d2cc77 | 3727 | .prepare_guest_switch = svm_prepare_guest_switch, |
6aa8b732 AK |
3728 | .vcpu_load = svm_vcpu_load, |
3729 | .vcpu_put = svm_vcpu_put, | |
3730 | ||
3731 | .set_guest_debug = svm_guest_debug, | |
3732 | .get_msr = svm_get_msr, | |
3733 | .set_msr = svm_set_msr, | |
3734 | .get_segment_base = svm_get_segment_base, | |
3735 | .get_segment = svm_get_segment, | |
3736 | .set_segment = svm_set_segment, | |
2e4d2653 | 3737 | .get_cpl = svm_get_cpl, |
1747fb71 | 3738 | .get_cs_db_l_bits = kvm_get_cs_db_l_bits, |
e8467fda | 3739 | .decache_cr0_guest_bits = svm_decache_cr0_guest_bits, |
25c4c276 | 3740 | .decache_cr4_guest_bits = svm_decache_cr4_guest_bits, |
6aa8b732 | 3741 | .set_cr0 = svm_set_cr0, |
6aa8b732 AK |
3742 | .set_cr3 = svm_set_cr3, |
3743 | .set_cr4 = svm_set_cr4, | |
3744 | .set_efer = svm_set_efer, | |
3745 | .get_idt = svm_get_idt, | |
3746 | .set_idt = svm_set_idt, | |
3747 | .get_gdt = svm_get_gdt, | |
3748 | .set_gdt = svm_set_gdt, | |
020df079 | 3749 | .set_dr7 = svm_set_dr7, |
6de4f3ad | 3750 | .cache_reg = svm_cache_reg, |
6aa8b732 AK |
3751 | .get_rflags = svm_get_rflags, |
3752 | .set_rflags = svm_set_rflags, | |
6b52d186 | 3753 | .fpu_activate = svm_fpu_activate, |
02daab21 | 3754 | .fpu_deactivate = svm_fpu_deactivate, |
6aa8b732 | 3755 | |
6aa8b732 | 3756 | .tlb_flush = svm_flush_tlb, |
6aa8b732 | 3757 | |
6aa8b732 | 3758 | .run = svm_vcpu_run, |
04d2cc77 | 3759 | .handle_exit = handle_exit, |
6aa8b732 | 3760 | .skip_emulated_instruction = skip_emulated_instruction, |
2809f5d2 GC |
3761 | .set_interrupt_shadow = svm_set_interrupt_shadow, |
3762 | .get_interrupt_shadow = svm_get_interrupt_shadow, | |
102d8325 | 3763 | .patch_hypercall = svm_patch_hypercall, |
2a8067f1 | 3764 | .set_irq = svm_set_irq, |
95ba8273 | 3765 | .set_nmi = svm_inject_nmi, |
298101da | 3766 | .queue_exception = svm_queue_exception, |
b463a6f7 | 3767 | .cancel_injection = svm_cancel_injection, |
78646121 | 3768 | .interrupt_allowed = svm_interrupt_allowed, |
95ba8273 | 3769 | .nmi_allowed = svm_nmi_allowed, |
3cfc3092 JK |
3770 | .get_nmi_mask = svm_get_nmi_mask, |
3771 | .set_nmi_mask = svm_set_nmi_mask, | |
95ba8273 GN |
3772 | .enable_nmi_window = enable_nmi_window, |
3773 | .enable_irq_window = enable_irq_window, | |
3774 | .update_cr8_intercept = update_cr8_intercept, | |
cbc94022 IE |
3775 | |
3776 | .set_tss_addr = svm_set_tss_addr, | |
67253af5 | 3777 | .get_tdp_level = get_npt_level, |
4b12f0de | 3778 | .get_mt_mask = svm_get_mt_mask, |
229456fc | 3779 | |
586f9607 | 3780 | .get_exit_info = svm_get_exit_info, |
229456fc | 3781 | .exit_reasons_str = svm_exit_reasons_str, |
586f9607 | 3782 | |
17cc3935 | 3783 | .get_lpage_level = svm_get_lpage_level, |
0e851880 SY |
3784 | |
3785 | .cpuid_update = svm_cpuid_update, | |
4e47c7a6 SY |
3786 | |
3787 | .rdtscp_supported = svm_rdtscp_supported, | |
d4330ef2 JR |
3788 | |
3789 | .set_supported_cpuid = svm_set_supported_cpuid, | |
f5f48ee1 SY |
3790 | |
3791 | .has_wbinvd_exit = svm_has_wbinvd_exit, | |
99e3e30a ZA |
3792 | |
3793 | .write_tsc_offset = svm_write_tsc_offset, | |
e48672fa | 3794 | .adjust_tsc_offset = svm_adjust_tsc_offset, |
1c97f0a0 JR |
3795 | |
3796 | .set_tdp_cr3 = set_tdp_cr3, | |
6aa8b732 AK |
3797 | }; |
3798 | ||
3799 | static int __init svm_init(void) | |
3800 | { | |
cb498ea2 | 3801 | return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm), |
0ee75bea | 3802 | __alignof__(struct vcpu_svm), THIS_MODULE); |
6aa8b732 AK |
3803 | } |
3804 | ||
3805 | static void __exit svm_exit(void) | |
3806 | { | |
cb498ea2 | 3807 | kvm_exit(); |
6aa8b732 AK |
3808 | } |
3809 | ||
3810 | module_init(svm_init) | |
3811 | module_exit(svm_exit) |