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1 | /* | |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * AMD SVM support | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
7 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. | |
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 | */ | |
17 | #include <linux/kvm_host.h> | |
18 | ||
19 | #include "irq.h" | |
20 | #include "mmu.h" | |
21 | #include "kvm_cache_regs.h" | |
22 | #include "x86.h" | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/highmem.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/ftrace_event.h> | |
30 | #include <linux/slab.h> | |
31 | ||
32 | #include <asm/tlbflush.h> | |
33 | #include <asm/desc.h> | |
34 | #include <asm/kvm_para.h> | |
35 | ||
36 | #include <asm/virtext.h> | |
37 | #include "trace.h" | |
38 | ||
39 | #define __ex(x) __kvm_handle_fault_on_reboot(x) | |
40 | ||
41 | MODULE_AUTHOR("Qumranet"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
44 | #define IOPM_ALLOC_ORDER 2 | |
45 | #define MSRPM_ALLOC_ORDER 1 | |
46 | ||
47 | #define SEG_TYPE_LDT 2 | |
48 | #define SEG_TYPE_BUSY_TSS16 3 | |
49 | ||
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_TSC_RATE (1 << 4) | |
55 | #define SVM_FEATURE_VMCB_CLEAN (1 << 5) | |
56 | #define SVM_FEATURE_FLUSH_ASID (1 << 6) | |
57 | #define SVM_FEATURE_DECODE_ASSIST (1 << 7) | |
58 | #define SVM_FEATURE_PAUSE_FILTER (1 << 10) | |
59 | ||
60 | #define NESTED_EXIT_HOST 0 /* Exit handled on host level */ | |
61 | #define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */ | |
62 | #define NESTED_EXIT_CONTINUE 2 /* Further checks needed */ | |
63 | ||
64 | #define DEBUGCTL_RESERVED_BITS (~(0x3fULL)) | |
65 | ||
66 | static bool erratum_383_found __read_mostly; | |
67 | ||
68 | static const u32 host_save_user_msrs[] = { | |
69 | #ifdef CONFIG_X86_64 | |
70 | MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE, | |
71 | MSR_FS_BASE, | |
72 | #endif | |
73 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
74 | }; | |
75 | ||
76 | #define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs) | |
77 | ||
78 | struct kvm_vcpu; | |
79 | ||
80 | struct nested_state { | |
81 | struct vmcb *hsave; | |
82 | u64 hsave_msr; | |
83 | u64 vm_cr_msr; | |
84 | u64 vmcb; | |
85 | ||
86 | /* These are the merged vectors */ | |
87 | u32 *msrpm; | |
88 | ||
89 | /* gpa pointers to the real vectors */ | |
90 | u64 vmcb_msrpm; | |
91 | u64 vmcb_iopm; | |
92 | ||
93 | /* A VMEXIT is required but not yet emulated */ | |
94 | bool exit_required; | |
95 | ||
96 | /* | |
97 | * If we vmexit during an instruction emulation we need this to restore | |
98 | * the l1 guest rip after the emulation | |
99 | */ | |
100 | unsigned long vmexit_rip; | |
101 | unsigned long vmexit_rsp; | |
102 | unsigned long vmexit_rax; | |
103 | ||
104 | /* cache for intercepts of the guest */ | |
105 | u32 intercept_cr; | |
106 | u32 intercept_dr; | |
107 | u32 intercept_exceptions; | |
108 | u64 intercept; | |
109 | ||
110 | /* Nested Paging related state */ | |
111 | u64 nested_cr3; | |
112 | }; | |
113 | ||
114 | #define MSRPM_OFFSETS 16 | |
115 | static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly; | |
116 | ||
117 | struct vcpu_svm { | |
118 | struct kvm_vcpu vcpu; | |
119 | struct vmcb *vmcb; | |
120 | unsigned long vmcb_pa; | |
121 | struct svm_cpu_data *svm_data; | |
122 | uint64_t asid_generation; | |
123 | uint64_t sysenter_esp; | |
124 | uint64_t sysenter_eip; | |
125 | ||
126 | u64 next_rip; | |
127 | ||
128 | u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS]; | |
129 | struct { | |
130 | u16 fs; | |
131 | u16 gs; | |
132 | u16 ldt; | |
133 | u64 gs_base; | |
134 | } host; | |
135 | ||
136 | u32 *msrpm; | |
137 | ||
138 | ulong nmi_iret_rip; | |
139 | ||
140 | struct nested_state nested; | |
141 | ||
142 | bool nmi_singlestep; | |
143 | ||
144 | unsigned int3_injected; | |
145 | unsigned long int3_rip; | |
146 | u32 apf_reason; | |
147 | }; | |
148 | ||
149 | #define MSR_INVALID 0xffffffffU | |
150 | ||
151 | static struct svm_direct_access_msrs { | |
152 | u32 index; /* Index of the MSR */ | |
153 | bool always; /* True if intercept is always on */ | |
154 | } direct_access_msrs[] = { | |
155 | { .index = MSR_STAR, .always = true }, | |
156 | { .index = MSR_IA32_SYSENTER_CS, .always = true }, | |
157 | #ifdef CONFIG_X86_64 | |
158 | { .index = MSR_GS_BASE, .always = true }, | |
159 | { .index = MSR_FS_BASE, .always = true }, | |
160 | { .index = MSR_KERNEL_GS_BASE, .always = true }, | |
161 | { .index = MSR_LSTAR, .always = true }, | |
162 | { .index = MSR_CSTAR, .always = true }, | |
163 | { .index = MSR_SYSCALL_MASK, .always = true }, | |
164 | #endif | |
165 | { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false }, | |
166 | { .index = MSR_IA32_LASTBRANCHTOIP, .always = false }, | |
167 | { .index = MSR_IA32_LASTINTFROMIP, .always = false }, | |
168 | { .index = MSR_IA32_LASTINTTOIP, .always = false }, | |
169 | { .index = MSR_INVALID, .always = false }, | |
170 | }; | |
171 | ||
172 | /* enable NPT for AMD64 and X86 with PAE */ | |
173 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) | |
174 | static bool npt_enabled = true; | |
175 | #else | |
176 | static bool npt_enabled; | |
177 | #endif | |
178 | static int npt = 1; | |
179 | ||
180 | module_param(npt, int, S_IRUGO); | |
181 | ||
182 | static int nested = 1; | |
183 | module_param(nested, int, S_IRUGO); | |
184 | ||
185 | static void svm_flush_tlb(struct kvm_vcpu *vcpu); | |
186 | static void svm_complete_interrupts(struct vcpu_svm *svm); | |
187 | ||
188 | static int nested_svm_exit_handled(struct vcpu_svm *svm); | |
189 | static int nested_svm_intercept(struct vcpu_svm *svm); | |
190 | static int nested_svm_vmexit(struct vcpu_svm *svm); | |
191 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, | |
192 | bool has_error_code, u32 error_code); | |
193 | ||
194 | enum { | |
195 | VMCB_INTERCEPTS, /* Intercept vectors, TSC offset, | |
196 | pause filter count */ | |
197 | VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */ | |
198 | VMCB_ASID, /* ASID */ | |
199 | VMCB_INTR, /* int_ctl, int_vector */ | |
200 | VMCB_NPT, /* npt_en, nCR3, gPAT */ | |
201 | VMCB_CR, /* CR0, CR3, CR4, EFER */ | |
202 | VMCB_DR, /* DR6, DR7 */ | |
203 | VMCB_DT, /* GDT, IDT */ | |
204 | VMCB_SEG, /* CS, DS, SS, ES, CPL */ | |
205 | VMCB_CR2, /* CR2 only */ | |
206 | VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */ | |
207 | VMCB_DIRTY_MAX, | |
208 | }; | |
209 | ||
210 | /* TPR and CR2 are always written before VMRUN */ | |
211 | #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2)) | |
212 | ||
213 | static inline void mark_all_dirty(struct vmcb *vmcb) | |
214 | { | |
215 | vmcb->control.clean = 0; | |
216 | } | |
217 | ||
218 | static inline void mark_all_clean(struct vmcb *vmcb) | |
219 | { | |
220 | vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1) | |
221 | & ~VMCB_ALWAYS_DIRTY_MASK; | |
222 | } | |
223 | ||
224 | static inline void mark_dirty(struct vmcb *vmcb, int bit) | |
225 | { | |
226 | vmcb->control.clean &= ~(1 << bit); | |
227 | } | |
228 | ||
229 | static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) | |
230 | { | |
231 | return container_of(vcpu, struct vcpu_svm, vcpu); | |
232 | } | |
233 | ||
234 | static void recalc_intercepts(struct vcpu_svm *svm) | |
235 | { | |
236 | struct vmcb_control_area *c, *h; | |
237 | struct nested_state *g; | |
238 | ||
239 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); | |
240 | ||
241 | if (!is_guest_mode(&svm->vcpu)) | |
242 | return; | |
243 | ||
244 | c = &svm->vmcb->control; | |
245 | h = &svm->nested.hsave->control; | |
246 | g = &svm->nested; | |
247 | ||
248 | c->intercept_cr = h->intercept_cr | g->intercept_cr; | |
249 | c->intercept_dr = h->intercept_dr | g->intercept_dr; | |
250 | c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions; | |
251 | c->intercept = h->intercept | g->intercept; | |
252 | } | |
253 | ||
254 | static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm) | |
255 | { | |
256 | if (is_guest_mode(&svm->vcpu)) | |
257 | return svm->nested.hsave; | |
258 | else | |
259 | return svm->vmcb; | |
260 | } | |
261 | ||
262 | static inline void set_cr_intercept(struct vcpu_svm *svm, int bit) | |
263 | { | |
264 | struct vmcb *vmcb = get_host_vmcb(svm); | |
265 | ||
266 | vmcb->control.intercept_cr |= (1U << bit); | |
267 | ||
268 | recalc_intercepts(svm); | |
269 | } | |
270 | ||
271 | static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit) | |
272 | { | |
273 | struct vmcb *vmcb = get_host_vmcb(svm); | |
274 | ||
275 | vmcb->control.intercept_cr &= ~(1U << bit); | |
276 | ||
277 | recalc_intercepts(svm); | |
278 | } | |
279 | ||
280 | static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit) | |
281 | { | |
282 | struct vmcb *vmcb = get_host_vmcb(svm); | |
283 | ||
284 | return vmcb->control.intercept_cr & (1U << bit); | |
285 | } | |
286 | ||
287 | static inline void set_dr_intercept(struct vcpu_svm *svm, int bit) | |
288 | { | |
289 | struct vmcb *vmcb = get_host_vmcb(svm); | |
290 | ||
291 | vmcb->control.intercept_dr |= (1U << bit); | |
292 | ||
293 | recalc_intercepts(svm); | |
294 | } | |
295 | ||
296 | static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit) | |
297 | { | |
298 | struct vmcb *vmcb = get_host_vmcb(svm); | |
299 | ||
300 | vmcb->control.intercept_dr &= ~(1U << bit); | |
301 | ||
302 | recalc_intercepts(svm); | |
303 | } | |
304 | ||
305 | static inline void set_exception_intercept(struct vcpu_svm *svm, int bit) | |
306 | { | |
307 | struct vmcb *vmcb = get_host_vmcb(svm); | |
308 | ||
309 | vmcb->control.intercept_exceptions |= (1U << bit); | |
310 | ||
311 | recalc_intercepts(svm); | |
312 | } | |
313 | ||
314 | static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit) | |
315 | { | |
316 | struct vmcb *vmcb = get_host_vmcb(svm); | |
317 | ||
318 | vmcb->control.intercept_exceptions &= ~(1U << bit); | |
319 | ||
320 | recalc_intercepts(svm); | |
321 | } | |
322 | ||
323 | static inline void set_intercept(struct vcpu_svm *svm, int bit) | |
324 | { | |
325 | struct vmcb *vmcb = get_host_vmcb(svm); | |
326 | ||
327 | vmcb->control.intercept |= (1ULL << bit); | |
328 | ||
329 | recalc_intercepts(svm); | |
330 | } | |
331 | ||
332 | static inline void clr_intercept(struct vcpu_svm *svm, int bit) | |
333 | { | |
334 | struct vmcb *vmcb = get_host_vmcb(svm); | |
335 | ||
336 | vmcb->control.intercept &= ~(1ULL << bit); | |
337 | ||
338 | recalc_intercepts(svm); | |
339 | } | |
340 | ||
341 | static inline void enable_gif(struct vcpu_svm *svm) | |
342 | { | |
343 | svm->vcpu.arch.hflags |= HF_GIF_MASK; | |
344 | } | |
345 | ||
346 | static inline void disable_gif(struct vcpu_svm *svm) | |
347 | { | |
348 | svm->vcpu.arch.hflags &= ~HF_GIF_MASK; | |
349 | } | |
350 | ||
351 | static inline bool gif_set(struct vcpu_svm *svm) | |
352 | { | |
353 | return !!(svm->vcpu.arch.hflags & HF_GIF_MASK); | |
354 | } | |
355 | ||
356 | static unsigned long iopm_base; | |
357 | ||
358 | struct kvm_ldttss_desc { | |
359 | u16 limit0; | |
360 | u16 base0; | |
361 | unsigned base1:8, type:5, dpl:2, p:1; | |
362 | unsigned limit1:4, zero0:3, g:1, base2:8; | |
363 | u32 base3; | |
364 | u32 zero1; | |
365 | } __attribute__((packed)); | |
366 | ||
367 | struct svm_cpu_data { | |
368 | int cpu; | |
369 | ||
370 | u64 asid_generation; | |
371 | u32 max_asid; | |
372 | u32 next_asid; | |
373 | struct kvm_ldttss_desc *tss_desc; | |
374 | ||
375 | struct page *save_area; | |
376 | }; | |
377 | ||
378 | static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data); | |
379 | ||
380 | struct svm_init_data { | |
381 | int cpu; | |
382 | int r; | |
383 | }; | |
384 | ||
385 | static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000}; | |
386 | ||
387 | #define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges) | |
388 | #define MSRS_RANGE_SIZE 2048 | |
389 | #define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2) | |
390 | ||
391 | static u32 svm_msrpm_offset(u32 msr) | |
392 | { | |
393 | u32 offset; | |
394 | int i; | |
395 | ||
396 | for (i = 0; i < NUM_MSR_MAPS; i++) { | |
397 | if (msr < msrpm_ranges[i] || | |
398 | msr >= msrpm_ranges[i] + MSRS_IN_RANGE) | |
399 | continue; | |
400 | ||
401 | offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */ | |
402 | offset += (i * MSRS_RANGE_SIZE); /* add range offset */ | |
403 | ||
404 | /* Now we have the u8 offset - but need the u32 offset */ | |
405 | return offset / 4; | |
406 | } | |
407 | ||
408 | /* MSR not in any range */ | |
409 | return MSR_INVALID; | |
410 | } | |
411 | ||
412 | #define MAX_INST_SIZE 15 | |
413 | ||
414 | static inline void clgi(void) | |
415 | { | |
416 | asm volatile (__ex(SVM_CLGI)); | |
417 | } | |
418 | ||
419 | static inline void stgi(void) | |
420 | { | |
421 | asm volatile (__ex(SVM_STGI)); | |
422 | } | |
423 | ||
424 | static inline void invlpga(unsigned long addr, u32 asid) | |
425 | { | |
426 | asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid)); | |
427 | } | |
428 | ||
429 | static int get_npt_level(void) | |
430 | { | |
431 | #ifdef CONFIG_X86_64 | |
432 | return PT64_ROOT_LEVEL; | |
433 | #else | |
434 | return PT32E_ROOT_LEVEL; | |
435 | #endif | |
436 | } | |
437 | ||
438 | static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer) | |
439 | { | |
440 | vcpu->arch.efer = efer; | |
441 | if (!npt_enabled && !(efer & EFER_LMA)) | |
442 | efer &= ~EFER_LME; | |
443 | ||
444 | to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME; | |
445 | mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR); | |
446 | } | |
447 | ||
448 | static int is_external_interrupt(u32 info) | |
449 | { | |
450 | info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID; | |
451 | return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR); | |
452 | } | |
453 | ||
454 | static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
455 | { | |
456 | struct vcpu_svm *svm = to_svm(vcpu); | |
457 | u32 ret = 0; | |
458 | ||
459 | if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) | |
460 | ret |= KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS; | |
461 | return ret & mask; | |
462 | } | |
463 | ||
464 | static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask) | |
465 | { | |
466 | struct vcpu_svm *svm = to_svm(vcpu); | |
467 | ||
468 | if (mask == 0) | |
469 | svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK; | |
470 | else | |
471 | svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK; | |
472 | ||
473 | } | |
474 | ||
475 | static void skip_emulated_instruction(struct kvm_vcpu *vcpu) | |
476 | { | |
477 | struct vcpu_svm *svm = to_svm(vcpu); | |
478 | ||
479 | if (svm->vmcb->control.next_rip != 0) | |
480 | svm->next_rip = svm->vmcb->control.next_rip; | |
481 | ||
482 | if (!svm->next_rip) { | |
483 | if (emulate_instruction(vcpu, EMULTYPE_SKIP) != | |
484 | EMULATE_DONE) | |
485 | printk(KERN_DEBUG "%s: NOP\n", __func__); | |
486 | return; | |
487 | } | |
488 | if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE) | |
489 | printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n", | |
490 | __func__, kvm_rip_read(vcpu), svm->next_rip); | |
491 | ||
492 | kvm_rip_write(vcpu, svm->next_rip); | |
493 | svm_set_interrupt_shadow(vcpu, 0); | |
494 | } | |
495 | ||
496 | static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr, | |
497 | bool has_error_code, u32 error_code, | |
498 | bool reinject) | |
499 | { | |
500 | struct vcpu_svm *svm = to_svm(vcpu); | |
501 | ||
502 | /* | |
503 | * If we are within a nested VM we'd better #VMEXIT and let the guest | |
504 | * handle the exception | |
505 | */ | |
506 | if (!reinject && | |
507 | nested_svm_check_exception(svm, nr, has_error_code, error_code)) | |
508 | return; | |
509 | ||
510 | if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) { | |
511 | unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu); | |
512 | ||
513 | /* | |
514 | * For guest debugging where we have to reinject #BP if some | |
515 | * INT3 is guest-owned: | |
516 | * Emulate nRIP by moving RIP forward. Will fail if injection | |
517 | * raises a fault that is not intercepted. Still better than | |
518 | * failing in all cases. | |
519 | */ | |
520 | skip_emulated_instruction(&svm->vcpu); | |
521 | rip = kvm_rip_read(&svm->vcpu); | |
522 | svm->int3_rip = rip + svm->vmcb->save.cs.base; | |
523 | svm->int3_injected = rip - old_rip; | |
524 | } | |
525 | ||
526 | svm->vmcb->control.event_inj = nr | |
527 | | SVM_EVTINJ_VALID | |
528 | | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0) | |
529 | | SVM_EVTINJ_TYPE_EXEPT; | |
530 | svm->vmcb->control.event_inj_err = error_code; | |
531 | } | |
532 | ||
533 | static void svm_init_erratum_383(void) | |
534 | { | |
535 | u32 low, high; | |
536 | int err; | |
537 | u64 val; | |
538 | ||
539 | if (!cpu_has_amd_erratum(amd_erratum_383)) | |
540 | return; | |
541 | ||
542 | /* Use _safe variants to not break nested virtualization */ | |
543 | val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err); | |
544 | if (err) | |
545 | return; | |
546 | ||
547 | val |= (1ULL << 47); | |
548 | ||
549 | low = lower_32_bits(val); | |
550 | high = upper_32_bits(val); | |
551 | ||
552 | native_write_msr_safe(MSR_AMD64_DC_CFG, low, high); | |
553 | ||
554 | erratum_383_found = true; | |
555 | } | |
556 | ||
557 | static int has_svm(void) | |
558 | { | |
559 | const char *msg; | |
560 | ||
561 | if (!cpu_has_svm(&msg)) { | |
562 | printk(KERN_INFO "has_svm: %s\n", msg); | |
563 | return 0; | |
564 | } | |
565 | ||
566 | return 1; | |
567 | } | |
568 | ||
569 | static void svm_hardware_disable(void *garbage) | |
570 | { | |
571 | cpu_svm_disable(); | |
572 | } | |
573 | ||
574 | static int svm_hardware_enable(void *garbage) | |
575 | { | |
576 | ||
577 | struct svm_cpu_data *sd; | |
578 | uint64_t efer; | |
579 | struct desc_ptr gdt_descr; | |
580 | struct desc_struct *gdt; | |
581 | int me = raw_smp_processor_id(); | |
582 | ||
583 | rdmsrl(MSR_EFER, efer); | |
584 | if (efer & EFER_SVME) | |
585 | return -EBUSY; | |
586 | ||
587 | if (!has_svm()) { | |
588 | printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n", | |
589 | me); | |
590 | return -EINVAL; | |
591 | } | |
592 | sd = per_cpu(svm_data, me); | |
593 | ||
594 | if (!sd) { | |
595 | printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n", | |
596 | me); | |
597 | return -EINVAL; | |
598 | } | |
599 | ||
600 | sd->asid_generation = 1; | |
601 | sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1; | |
602 | sd->next_asid = sd->max_asid + 1; | |
603 | ||
604 | native_store_gdt(&gdt_descr); | |
605 | gdt = (struct desc_struct *)gdt_descr.address; | |
606 | sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS); | |
607 | ||
608 | wrmsrl(MSR_EFER, efer | EFER_SVME); | |
609 | ||
610 | wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT); | |
611 | ||
612 | svm_init_erratum_383(); | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static void svm_cpu_uninit(int cpu) | |
618 | { | |
619 | struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id()); | |
620 | ||
621 | if (!sd) | |
622 | return; | |
623 | ||
624 | per_cpu(svm_data, raw_smp_processor_id()) = NULL; | |
625 | __free_page(sd->save_area); | |
626 | kfree(sd); | |
627 | } | |
628 | ||
629 | static int svm_cpu_init(int cpu) | |
630 | { | |
631 | struct svm_cpu_data *sd; | |
632 | int r; | |
633 | ||
634 | sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL); | |
635 | if (!sd) | |
636 | return -ENOMEM; | |
637 | sd->cpu = cpu; | |
638 | sd->save_area = alloc_page(GFP_KERNEL); | |
639 | r = -ENOMEM; | |
640 | if (!sd->save_area) | |
641 | goto err_1; | |
642 | ||
643 | per_cpu(svm_data, cpu) = sd; | |
644 | ||
645 | return 0; | |
646 | ||
647 | err_1: | |
648 | kfree(sd); | |
649 | return r; | |
650 | ||
651 | } | |
652 | ||
653 | static bool valid_msr_intercept(u32 index) | |
654 | { | |
655 | int i; | |
656 | ||
657 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) | |
658 | if (direct_access_msrs[i].index == index) | |
659 | return true; | |
660 | ||
661 | return false; | |
662 | } | |
663 | ||
664 | static void set_msr_interception(u32 *msrpm, unsigned msr, | |
665 | int read, int write) | |
666 | { | |
667 | u8 bit_read, bit_write; | |
668 | unsigned long tmp; | |
669 | u32 offset; | |
670 | ||
671 | /* | |
672 | * If this warning triggers extend the direct_access_msrs list at the | |
673 | * beginning of the file | |
674 | */ | |
675 | WARN_ON(!valid_msr_intercept(msr)); | |
676 | ||
677 | offset = svm_msrpm_offset(msr); | |
678 | bit_read = 2 * (msr & 0x0f); | |
679 | bit_write = 2 * (msr & 0x0f) + 1; | |
680 | tmp = msrpm[offset]; | |
681 | ||
682 | BUG_ON(offset == MSR_INVALID); | |
683 | ||
684 | read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp); | |
685 | write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp); | |
686 | ||
687 | msrpm[offset] = tmp; | |
688 | } | |
689 | ||
690 | static void svm_vcpu_init_msrpm(u32 *msrpm) | |
691 | { | |
692 | int i; | |
693 | ||
694 | memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER)); | |
695 | ||
696 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { | |
697 | if (!direct_access_msrs[i].always) | |
698 | continue; | |
699 | ||
700 | set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1); | |
701 | } | |
702 | } | |
703 | ||
704 | static void add_msr_offset(u32 offset) | |
705 | { | |
706 | int i; | |
707 | ||
708 | for (i = 0; i < MSRPM_OFFSETS; ++i) { | |
709 | ||
710 | /* Offset already in list? */ | |
711 | if (msrpm_offsets[i] == offset) | |
712 | return; | |
713 | ||
714 | /* Slot used by another offset? */ | |
715 | if (msrpm_offsets[i] != MSR_INVALID) | |
716 | continue; | |
717 | ||
718 | /* Add offset to list */ | |
719 | msrpm_offsets[i] = offset; | |
720 | ||
721 | return; | |
722 | } | |
723 | ||
724 | /* | |
725 | * If this BUG triggers the msrpm_offsets table has an overflow. Just | |
726 | * increase MSRPM_OFFSETS in this case. | |
727 | */ | |
728 | BUG(); | |
729 | } | |
730 | ||
731 | static void init_msrpm_offsets(void) | |
732 | { | |
733 | int i; | |
734 | ||
735 | memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets)); | |
736 | ||
737 | for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) { | |
738 | u32 offset; | |
739 | ||
740 | offset = svm_msrpm_offset(direct_access_msrs[i].index); | |
741 | BUG_ON(offset == MSR_INVALID); | |
742 | ||
743 | add_msr_offset(offset); | |
744 | } | |
745 | } | |
746 | ||
747 | static void svm_enable_lbrv(struct vcpu_svm *svm) | |
748 | { | |
749 | u32 *msrpm = svm->msrpm; | |
750 | ||
751 | svm->vmcb->control.lbr_ctl = 1; | |
752 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1); | |
753 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1); | |
754 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1); | |
755 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1); | |
756 | } | |
757 | ||
758 | static void svm_disable_lbrv(struct vcpu_svm *svm) | |
759 | { | |
760 | u32 *msrpm = svm->msrpm; | |
761 | ||
762 | svm->vmcb->control.lbr_ctl = 0; | |
763 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0); | |
764 | set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0); | |
765 | set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0); | |
766 | set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0); | |
767 | } | |
768 | ||
769 | static __init int svm_hardware_setup(void) | |
770 | { | |
771 | int cpu; | |
772 | struct page *iopm_pages; | |
773 | void *iopm_va; | |
774 | int r; | |
775 | ||
776 | iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER); | |
777 | ||
778 | if (!iopm_pages) | |
779 | return -ENOMEM; | |
780 | ||
781 | iopm_va = page_address(iopm_pages); | |
782 | memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER)); | |
783 | iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT; | |
784 | ||
785 | init_msrpm_offsets(); | |
786 | ||
787 | if (boot_cpu_has(X86_FEATURE_NX)) | |
788 | kvm_enable_efer_bits(EFER_NX); | |
789 | ||
790 | if (boot_cpu_has(X86_FEATURE_FXSR_OPT)) | |
791 | kvm_enable_efer_bits(EFER_FFXSR); | |
792 | ||
793 | if (nested) { | |
794 | printk(KERN_INFO "kvm: Nested Virtualization enabled\n"); | |
795 | kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE); | |
796 | } | |
797 | ||
798 | for_each_possible_cpu(cpu) { | |
799 | r = svm_cpu_init(cpu); | |
800 | if (r) | |
801 | goto err; | |
802 | } | |
803 | ||
804 | if (!boot_cpu_has(X86_FEATURE_NPT)) | |
805 | npt_enabled = false; | |
806 | ||
807 | if (npt_enabled && !npt) { | |
808 | printk(KERN_INFO "kvm: Nested Paging disabled\n"); | |
809 | npt_enabled = false; | |
810 | } | |
811 | ||
812 | if (npt_enabled) { | |
813 | printk(KERN_INFO "kvm: Nested Paging enabled\n"); | |
814 | kvm_enable_tdp(); | |
815 | } else | |
816 | kvm_disable_tdp(); | |
817 | ||
818 | return 0; | |
819 | ||
820 | err: | |
821 | __free_pages(iopm_pages, IOPM_ALLOC_ORDER); | |
822 | iopm_base = 0; | |
823 | return r; | |
824 | } | |
825 | ||
826 | static __exit void svm_hardware_unsetup(void) | |
827 | { | |
828 | int cpu; | |
829 | ||
830 | for_each_possible_cpu(cpu) | |
831 | svm_cpu_uninit(cpu); | |
832 | ||
833 | __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER); | |
834 | iopm_base = 0; | |
835 | } | |
836 | ||
837 | static void init_seg(struct vmcb_seg *seg) | |
838 | { | |
839 | seg->selector = 0; | |
840 | seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK | | |
841 | SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */ | |
842 | seg->limit = 0xffff; | |
843 | seg->base = 0; | |
844 | } | |
845 | ||
846 | static void init_sys_seg(struct vmcb_seg *seg, uint32_t type) | |
847 | { | |
848 | seg->selector = 0; | |
849 | seg->attrib = SVM_SELECTOR_P_MASK | type; | |
850 | seg->limit = 0xffff; | |
851 | seg->base = 0; | |
852 | } | |
853 | ||
854 | static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset) | |
855 | { | |
856 | struct vcpu_svm *svm = to_svm(vcpu); | |
857 | u64 g_tsc_offset = 0; | |
858 | ||
859 | if (is_guest_mode(vcpu)) { | |
860 | g_tsc_offset = svm->vmcb->control.tsc_offset - | |
861 | svm->nested.hsave->control.tsc_offset; | |
862 | svm->nested.hsave->control.tsc_offset = offset; | |
863 | } | |
864 | ||
865 | svm->vmcb->control.tsc_offset = offset + g_tsc_offset; | |
866 | ||
867 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); | |
868 | } | |
869 | ||
870 | static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment) | |
871 | { | |
872 | struct vcpu_svm *svm = to_svm(vcpu); | |
873 | ||
874 | svm->vmcb->control.tsc_offset += adjustment; | |
875 | if (is_guest_mode(vcpu)) | |
876 | svm->nested.hsave->control.tsc_offset += adjustment; | |
877 | mark_dirty(svm->vmcb, VMCB_INTERCEPTS); | |
878 | } | |
879 | ||
880 | static void init_vmcb(struct vcpu_svm *svm) | |
881 | { | |
882 | struct vmcb_control_area *control = &svm->vmcb->control; | |
883 | struct vmcb_save_area *save = &svm->vmcb->save; | |
884 | ||
885 | svm->vcpu.fpu_active = 1; | |
886 | svm->vcpu.arch.hflags = 0; | |
887 | ||
888 | set_cr_intercept(svm, INTERCEPT_CR0_READ); | |
889 | set_cr_intercept(svm, INTERCEPT_CR3_READ); | |
890 | set_cr_intercept(svm, INTERCEPT_CR4_READ); | |
891 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
892 | set_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
893 | set_cr_intercept(svm, INTERCEPT_CR4_WRITE); | |
894 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
895 | ||
896 | set_dr_intercept(svm, INTERCEPT_DR0_READ); | |
897 | set_dr_intercept(svm, INTERCEPT_DR1_READ); | |
898 | set_dr_intercept(svm, INTERCEPT_DR2_READ); | |
899 | set_dr_intercept(svm, INTERCEPT_DR3_READ); | |
900 | set_dr_intercept(svm, INTERCEPT_DR4_READ); | |
901 | set_dr_intercept(svm, INTERCEPT_DR5_READ); | |
902 | set_dr_intercept(svm, INTERCEPT_DR6_READ); | |
903 | set_dr_intercept(svm, INTERCEPT_DR7_READ); | |
904 | ||
905 | set_dr_intercept(svm, INTERCEPT_DR0_WRITE); | |
906 | set_dr_intercept(svm, INTERCEPT_DR1_WRITE); | |
907 | set_dr_intercept(svm, INTERCEPT_DR2_WRITE); | |
908 | set_dr_intercept(svm, INTERCEPT_DR3_WRITE); | |
909 | set_dr_intercept(svm, INTERCEPT_DR4_WRITE); | |
910 | set_dr_intercept(svm, INTERCEPT_DR5_WRITE); | |
911 | set_dr_intercept(svm, INTERCEPT_DR6_WRITE); | |
912 | set_dr_intercept(svm, INTERCEPT_DR7_WRITE); | |
913 | ||
914 | set_exception_intercept(svm, PF_VECTOR); | |
915 | set_exception_intercept(svm, UD_VECTOR); | |
916 | set_exception_intercept(svm, MC_VECTOR); | |
917 | ||
918 | set_intercept(svm, INTERCEPT_INTR); | |
919 | set_intercept(svm, INTERCEPT_NMI); | |
920 | set_intercept(svm, INTERCEPT_SMI); | |
921 | set_intercept(svm, INTERCEPT_SELECTIVE_CR0); | |
922 | set_intercept(svm, INTERCEPT_CPUID); | |
923 | set_intercept(svm, INTERCEPT_INVD); | |
924 | set_intercept(svm, INTERCEPT_HLT); | |
925 | set_intercept(svm, INTERCEPT_INVLPG); | |
926 | set_intercept(svm, INTERCEPT_INVLPGA); | |
927 | set_intercept(svm, INTERCEPT_IOIO_PROT); | |
928 | set_intercept(svm, INTERCEPT_MSR_PROT); | |
929 | set_intercept(svm, INTERCEPT_TASK_SWITCH); | |
930 | set_intercept(svm, INTERCEPT_SHUTDOWN); | |
931 | set_intercept(svm, INTERCEPT_VMRUN); | |
932 | set_intercept(svm, INTERCEPT_VMMCALL); | |
933 | set_intercept(svm, INTERCEPT_VMLOAD); | |
934 | set_intercept(svm, INTERCEPT_VMSAVE); | |
935 | set_intercept(svm, INTERCEPT_STGI); | |
936 | set_intercept(svm, INTERCEPT_CLGI); | |
937 | set_intercept(svm, INTERCEPT_SKINIT); | |
938 | set_intercept(svm, INTERCEPT_WBINVD); | |
939 | set_intercept(svm, INTERCEPT_MONITOR); | |
940 | set_intercept(svm, INTERCEPT_MWAIT); | |
941 | set_intercept(svm, INTERCEPT_XSETBV); | |
942 | ||
943 | control->iopm_base_pa = iopm_base; | |
944 | control->msrpm_base_pa = __pa(svm->msrpm); | |
945 | control->int_ctl = V_INTR_MASKING_MASK; | |
946 | ||
947 | init_seg(&save->es); | |
948 | init_seg(&save->ss); | |
949 | init_seg(&save->ds); | |
950 | init_seg(&save->fs); | |
951 | init_seg(&save->gs); | |
952 | ||
953 | save->cs.selector = 0xf000; | |
954 | /* Executable/Readable Code Segment */ | |
955 | save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK | | |
956 | SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK; | |
957 | save->cs.limit = 0xffff; | |
958 | /* | |
959 | * cs.base should really be 0xffff0000, but vmx can't handle that, so | |
960 | * be consistent with it. | |
961 | * | |
962 | * Replace when we have real mode working for vmx. | |
963 | */ | |
964 | save->cs.base = 0xf0000; | |
965 | ||
966 | save->gdtr.limit = 0xffff; | |
967 | save->idtr.limit = 0xffff; | |
968 | ||
969 | init_sys_seg(&save->ldtr, SEG_TYPE_LDT); | |
970 | init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16); | |
971 | ||
972 | svm_set_efer(&svm->vcpu, 0); | |
973 | save->dr6 = 0xffff0ff0; | |
974 | save->dr7 = 0x400; | |
975 | kvm_set_rflags(&svm->vcpu, 2); | |
976 | save->rip = 0x0000fff0; | |
977 | svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip; | |
978 | ||
979 | /* | |
980 | * This is the guest-visible cr0 value. | |
981 | * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0. | |
982 | */ | |
983 | svm->vcpu.arch.cr0 = 0; | |
984 | (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET); | |
985 | ||
986 | save->cr4 = X86_CR4_PAE; | |
987 | /* rdx = ?? */ | |
988 | ||
989 | if (npt_enabled) { | |
990 | /* Setup VMCB for Nested Paging */ | |
991 | control->nested_ctl = 1; | |
992 | clr_intercept(svm, INTERCEPT_TASK_SWITCH); | |
993 | clr_intercept(svm, INTERCEPT_INVLPG); | |
994 | clr_exception_intercept(svm, PF_VECTOR); | |
995 | clr_cr_intercept(svm, INTERCEPT_CR3_READ); | |
996 | clr_cr_intercept(svm, INTERCEPT_CR3_WRITE); | |
997 | save->g_pat = 0x0007040600070406ULL; | |
998 | save->cr3 = 0; | |
999 | save->cr4 = 0; | |
1000 | } | |
1001 | svm->asid_generation = 0; | |
1002 | ||
1003 | svm->nested.vmcb = 0; | |
1004 | svm->vcpu.arch.hflags = 0; | |
1005 | ||
1006 | if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) { | |
1007 | control->pause_filter_count = 3000; | |
1008 | set_intercept(svm, INTERCEPT_PAUSE); | |
1009 | } | |
1010 | ||
1011 | mark_all_dirty(svm->vmcb); | |
1012 | ||
1013 | enable_gif(svm); | |
1014 | } | |
1015 | ||
1016 | static int svm_vcpu_reset(struct kvm_vcpu *vcpu) | |
1017 | { | |
1018 | struct vcpu_svm *svm = to_svm(vcpu); | |
1019 | ||
1020 | init_vmcb(svm); | |
1021 | ||
1022 | if (!kvm_vcpu_is_bsp(vcpu)) { | |
1023 | kvm_rip_write(vcpu, 0); | |
1024 | svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12; | |
1025 | svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8; | |
1026 | } | |
1027 | vcpu->arch.regs_avail = ~0; | |
1028 | vcpu->arch.regs_dirty = ~0; | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) | |
1034 | { | |
1035 | struct vcpu_svm *svm; | |
1036 | struct page *page; | |
1037 | struct page *msrpm_pages; | |
1038 | struct page *hsave_page; | |
1039 | struct page *nested_msrpm_pages; | |
1040 | int err; | |
1041 | ||
1042 | svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
1043 | if (!svm) { | |
1044 | err = -ENOMEM; | |
1045 | goto out; | |
1046 | } | |
1047 | ||
1048 | err = kvm_vcpu_init(&svm->vcpu, kvm, id); | |
1049 | if (err) | |
1050 | goto free_svm; | |
1051 | ||
1052 | err = -ENOMEM; | |
1053 | page = alloc_page(GFP_KERNEL); | |
1054 | if (!page) | |
1055 | goto uninit; | |
1056 | ||
1057 | msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
1058 | if (!msrpm_pages) | |
1059 | goto free_page1; | |
1060 | ||
1061 | nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); | |
1062 | if (!nested_msrpm_pages) | |
1063 | goto free_page2; | |
1064 | ||
1065 | hsave_page = alloc_page(GFP_KERNEL); | |
1066 | if (!hsave_page) | |
1067 | goto free_page3; | |
1068 | ||
1069 | svm->nested.hsave = page_address(hsave_page); | |
1070 | ||
1071 | svm->msrpm = page_address(msrpm_pages); | |
1072 | svm_vcpu_init_msrpm(svm->msrpm); | |
1073 | ||
1074 | svm->nested.msrpm = page_address(nested_msrpm_pages); | |
1075 | svm_vcpu_init_msrpm(svm->nested.msrpm); | |
1076 | ||
1077 | svm->vmcb = page_address(page); | |
1078 | clear_page(svm->vmcb); | |
1079 | svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT; | |
1080 | svm->asid_generation = 0; | |
1081 | init_vmcb(svm); | |
1082 | kvm_write_tsc(&svm->vcpu, 0); | |
1083 | ||
1084 | err = fx_init(&svm->vcpu); | |
1085 | if (err) | |
1086 | goto free_page4; | |
1087 | ||
1088 | svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; | |
1089 | if (kvm_vcpu_is_bsp(&svm->vcpu)) | |
1090 | svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; | |
1091 | ||
1092 | return &svm->vcpu; | |
1093 | ||
1094 | free_page4: | |
1095 | __free_page(hsave_page); | |
1096 | free_page3: | |
1097 | __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER); | |
1098 | free_page2: | |
1099 | __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); | |
1100 | free_page1: | |
1101 | __free_page(page); | |
1102 | uninit: | |
1103 | kvm_vcpu_uninit(&svm->vcpu); | |
1104 | free_svm: | |
1105 | kmem_cache_free(kvm_vcpu_cache, svm); | |
1106 | out: | |
1107 | return ERR_PTR(err); | |
1108 | } | |
1109 | ||
1110 | static void svm_free_vcpu(struct kvm_vcpu *vcpu) | |
1111 | { | |
1112 | struct vcpu_svm *svm = to_svm(vcpu); | |
1113 | ||
1114 | __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT)); | |
1115 | __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER); | |
1116 | __free_page(virt_to_page(svm->nested.hsave)); | |
1117 | __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER); | |
1118 | kvm_vcpu_uninit(vcpu); | |
1119 | kmem_cache_free(kvm_vcpu_cache, svm); | |
1120 | } | |
1121 | ||
1122 | static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
1123 | { | |
1124 | struct vcpu_svm *svm = to_svm(vcpu); | |
1125 | int i; | |
1126 | ||
1127 | if (unlikely(cpu != vcpu->cpu)) { | |
1128 | svm->asid_generation = 0; | |
1129 | mark_all_dirty(svm->vmcb); | |
1130 | } | |
1131 | ||
1132 | #ifdef CONFIG_X86_64 | |
1133 | rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base); | |
1134 | #endif | |
1135 | savesegment(fs, svm->host.fs); | |
1136 | savesegment(gs, svm->host.gs); | |
1137 | svm->host.ldt = kvm_read_ldt(); | |
1138 | ||
1139 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) | |
1140 | rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); | |
1141 | } | |
1142 | ||
1143 | static void svm_vcpu_put(struct kvm_vcpu *vcpu) | |
1144 | { | |
1145 | struct vcpu_svm *svm = to_svm(vcpu); | |
1146 | int i; | |
1147 | ||
1148 | ++vcpu->stat.host_state_reload; | |
1149 | kvm_load_ldt(svm->host.ldt); | |
1150 | #ifdef CONFIG_X86_64 | |
1151 | loadsegment(fs, svm->host.fs); | |
1152 | wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs); | |
1153 | load_gs_index(svm->host.gs); | |
1154 | #else | |
1155 | #ifdef CONFIG_X86_32_LAZY_GS | |
1156 | loadsegment(gs, svm->host.gs); | |
1157 | #endif | |
1158 | #endif | |
1159 | for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++) | |
1160 | wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]); | |
1161 | } | |
1162 | ||
1163 | static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu) | |
1164 | { | |
1165 | return to_svm(vcpu)->vmcb->save.rflags; | |
1166 | } | |
1167 | ||
1168 | static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags) | |
1169 | { | |
1170 | to_svm(vcpu)->vmcb->save.rflags = rflags; | |
1171 | } | |
1172 | ||
1173 | static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) | |
1174 | { | |
1175 | switch (reg) { | |
1176 | case VCPU_EXREG_PDPTR: | |
1177 | BUG_ON(!npt_enabled); | |
1178 | load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu)); | |
1179 | break; | |
1180 | default: | |
1181 | BUG(); | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | static void svm_set_vintr(struct vcpu_svm *svm) | |
1186 | { | |
1187 | set_intercept(svm, INTERCEPT_VINTR); | |
1188 | } | |
1189 | ||
1190 | static void svm_clear_vintr(struct vcpu_svm *svm) | |
1191 | { | |
1192 | clr_intercept(svm, INTERCEPT_VINTR); | |
1193 | } | |
1194 | ||
1195 | static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg) | |
1196 | { | |
1197 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; | |
1198 | ||
1199 | switch (seg) { | |
1200 | case VCPU_SREG_CS: return &save->cs; | |
1201 | case VCPU_SREG_DS: return &save->ds; | |
1202 | case VCPU_SREG_ES: return &save->es; | |
1203 | case VCPU_SREG_FS: return &save->fs; | |
1204 | case VCPU_SREG_GS: return &save->gs; | |
1205 | case VCPU_SREG_SS: return &save->ss; | |
1206 | case VCPU_SREG_TR: return &save->tr; | |
1207 | case VCPU_SREG_LDTR: return &save->ldtr; | |
1208 | } | |
1209 | BUG(); | |
1210 | return NULL; | |
1211 | } | |
1212 | ||
1213 | static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1214 | { | |
1215 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1216 | ||
1217 | return s->base; | |
1218 | } | |
1219 | ||
1220 | static void svm_get_segment(struct kvm_vcpu *vcpu, | |
1221 | struct kvm_segment *var, int seg) | |
1222 | { | |
1223 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1224 | ||
1225 | var->base = s->base; | |
1226 | var->limit = s->limit; | |
1227 | var->selector = s->selector; | |
1228 | var->type = s->attrib & SVM_SELECTOR_TYPE_MASK; | |
1229 | var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1; | |
1230 | var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
1231 | var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1; | |
1232 | var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1; | |
1233 | var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1; | |
1234 | var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1; | |
1235 | var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1; | |
1236 | ||
1237 | /* | |
1238 | * AMD's VMCB does not have an explicit unusable field, so emulate it | |
1239 | * for cross vendor migration purposes by "not present" | |
1240 | */ | |
1241 | var->unusable = !var->present || (var->type == 0); | |
1242 | ||
1243 | switch (seg) { | |
1244 | case VCPU_SREG_CS: | |
1245 | /* | |
1246 | * SVM always stores 0 for the 'G' bit in the CS selector in | |
1247 | * the VMCB on a VMEXIT. This hurts cross-vendor migration: | |
1248 | * Intel's VMENTRY has a check on the 'G' bit. | |
1249 | */ | |
1250 | var->g = s->limit > 0xfffff; | |
1251 | break; | |
1252 | case VCPU_SREG_TR: | |
1253 | /* | |
1254 | * Work around a bug where the busy flag in the tr selector | |
1255 | * isn't exposed | |
1256 | */ | |
1257 | var->type |= 0x2; | |
1258 | break; | |
1259 | case VCPU_SREG_DS: | |
1260 | case VCPU_SREG_ES: | |
1261 | case VCPU_SREG_FS: | |
1262 | case VCPU_SREG_GS: | |
1263 | /* | |
1264 | * The accessed bit must always be set in the segment | |
1265 | * descriptor cache, although it can be cleared in the | |
1266 | * descriptor, the cached bit always remains at 1. Since | |
1267 | * Intel has a check on this, set it here to support | |
1268 | * cross-vendor migration. | |
1269 | */ | |
1270 | if (!var->unusable) | |
1271 | var->type |= 0x1; | |
1272 | break; | |
1273 | case VCPU_SREG_SS: | |
1274 | /* | |
1275 | * On AMD CPUs sometimes the DB bit in the segment | |
1276 | * descriptor is left as 1, although the whole segment has | |
1277 | * been made unusable. Clear it here to pass an Intel VMX | |
1278 | * entry check when cross vendor migrating. | |
1279 | */ | |
1280 | if (var->unusable) | |
1281 | var->db = 0; | |
1282 | break; | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | static int svm_get_cpl(struct kvm_vcpu *vcpu) | |
1287 | { | |
1288 | struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save; | |
1289 | ||
1290 | return save->cpl; | |
1291 | } | |
1292 | ||
1293 | static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) | |
1294 | { | |
1295 | struct vcpu_svm *svm = to_svm(vcpu); | |
1296 | ||
1297 | dt->size = svm->vmcb->save.idtr.limit; | |
1298 | dt->address = svm->vmcb->save.idtr.base; | |
1299 | } | |
1300 | ||
1301 | static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) | |
1302 | { | |
1303 | struct vcpu_svm *svm = to_svm(vcpu); | |
1304 | ||
1305 | svm->vmcb->save.idtr.limit = dt->size; | |
1306 | svm->vmcb->save.idtr.base = dt->address ; | |
1307 | mark_dirty(svm->vmcb, VMCB_DT); | |
1308 | } | |
1309 | ||
1310 | static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) | |
1311 | { | |
1312 | struct vcpu_svm *svm = to_svm(vcpu); | |
1313 | ||
1314 | dt->size = svm->vmcb->save.gdtr.limit; | |
1315 | dt->address = svm->vmcb->save.gdtr.base; | |
1316 | } | |
1317 | ||
1318 | static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt) | |
1319 | { | |
1320 | struct vcpu_svm *svm = to_svm(vcpu); | |
1321 | ||
1322 | svm->vmcb->save.gdtr.limit = dt->size; | |
1323 | svm->vmcb->save.gdtr.base = dt->address ; | |
1324 | mark_dirty(svm->vmcb, VMCB_DT); | |
1325 | } | |
1326 | ||
1327 | static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu) | |
1328 | { | |
1329 | } | |
1330 | ||
1331 | static void svm_decache_cr3(struct kvm_vcpu *vcpu) | |
1332 | { | |
1333 | } | |
1334 | ||
1335 | static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu) | |
1336 | { | |
1337 | } | |
1338 | ||
1339 | static void update_cr0_intercept(struct vcpu_svm *svm) | |
1340 | { | |
1341 | ulong gcr0 = svm->vcpu.arch.cr0; | |
1342 | u64 *hcr0 = &svm->vmcb->save.cr0; | |
1343 | ||
1344 | if (!svm->vcpu.fpu_active) | |
1345 | *hcr0 |= SVM_CR0_SELECTIVE_MASK; | |
1346 | else | |
1347 | *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK) | |
1348 | | (gcr0 & SVM_CR0_SELECTIVE_MASK); | |
1349 | ||
1350 | mark_dirty(svm->vmcb, VMCB_CR); | |
1351 | ||
1352 | if (gcr0 == *hcr0 && svm->vcpu.fpu_active) { | |
1353 | clr_cr_intercept(svm, INTERCEPT_CR0_READ); | |
1354 | clr_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
1355 | } else { | |
1356 | set_cr_intercept(svm, INTERCEPT_CR0_READ); | |
1357 | set_cr_intercept(svm, INTERCEPT_CR0_WRITE); | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
1362 | { | |
1363 | struct vcpu_svm *svm = to_svm(vcpu); | |
1364 | ||
1365 | if (is_guest_mode(vcpu)) { | |
1366 | /* | |
1367 | * We are here because we run in nested mode, the host kvm | |
1368 | * intercepts cr0 writes but the l1 hypervisor does not. | |
1369 | * But the L1 hypervisor may intercept selective cr0 writes. | |
1370 | * This needs to be checked here. | |
1371 | */ | |
1372 | unsigned long old, new; | |
1373 | ||
1374 | /* Remove bits that would trigger a real cr0 write intercept */ | |
1375 | old = vcpu->arch.cr0 & SVM_CR0_SELECTIVE_MASK; | |
1376 | new = cr0 & SVM_CR0_SELECTIVE_MASK; | |
1377 | ||
1378 | if (old == new) { | |
1379 | /* cr0 write with ts and mp unchanged */ | |
1380 | svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE; | |
1381 | if (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE) { | |
1382 | svm->nested.vmexit_rip = kvm_rip_read(vcpu); | |
1383 | svm->nested.vmexit_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
1384 | svm->nested.vmexit_rax = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
1385 | return; | |
1386 | } | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | #ifdef CONFIG_X86_64 | |
1391 | if (vcpu->arch.efer & EFER_LME) { | |
1392 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
1393 | vcpu->arch.efer |= EFER_LMA; | |
1394 | svm->vmcb->save.efer |= EFER_LMA | EFER_LME; | |
1395 | } | |
1396 | ||
1397 | if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) { | |
1398 | vcpu->arch.efer &= ~EFER_LMA; | |
1399 | svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME); | |
1400 | } | |
1401 | } | |
1402 | #endif | |
1403 | vcpu->arch.cr0 = cr0; | |
1404 | ||
1405 | if (!npt_enabled) | |
1406 | cr0 |= X86_CR0_PG | X86_CR0_WP; | |
1407 | ||
1408 | if (!vcpu->fpu_active) | |
1409 | cr0 |= X86_CR0_TS; | |
1410 | /* | |
1411 | * re-enable caching here because the QEMU bios | |
1412 | * does not do it - this results in some delay at | |
1413 | * reboot | |
1414 | */ | |
1415 | cr0 &= ~(X86_CR0_CD | X86_CR0_NW); | |
1416 | svm->vmcb->save.cr0 = cr0; | |
1417 | mark_dirty(svm->vmcb, VMCB_CR); | |
1418 | update_cr0_intercept(svm); | |
1419 | } | |
1420 | ||
1421 | static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
1422 | { | |
1423 | unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE; | |
1424 | unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4; | |
1425 | ||
1426 | if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE)) | |
1427 | svm_flush_tlb(vcpu); | |
1428 | ||
1429 | vcpu->arch.cr4 = cr4; | |
1430 | if (!npt_enabled) | |
1431 | cr4 |= X86_CR4_PAE; | |
1432 | cr4 |= host_cr4_mce; | |
1433 | to_svm(vcpu)->vmcb->save.cr4 = cr4; | |
1434 | mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR); | |
1435 | } | |
1436 | ||
1437 | static void svm_set_segment(struct kvm_vcpu *vcpu, | |
1438 | struct kvm_segment *var, int seg) | |
1439 | { | |
1440 | struct vcpu_svm *svm = to_svm(vcpu); | |
1441 | struct vmcb_seg *s = svm_seg(vcpu, seg); | |
1442 | ||
1443 | s->base = var->base; | |
1444 | s->limit = var->limit; | |
1445 | s->selector = var->selector; | |
1446 | if (var->unusable) | |
1447 | s->attrib = 0; | |
1448 | else { | |
1449 | s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK); | |
1450 | s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT; | |
1451 | s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT; | |
1452 | s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT; | |
1453 | s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT; | |
1454 | s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT; | |
1455 | s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT; | |
1456 | s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT; | |
1457 | } | |
1458 | if (seg == VCPU_SREG_CS) | |
1459 | svm->vmcb->save.cpl | |
1460 | = (svm->vmcb->save.cs.attrib | |
1461 | >> SVM_SELECTOR_DPL_SHIFT) & 3; | |
1462 | ||
1463 | mark_dirty(svm->vmcb, VMCB_SEG); | |
1464 | } | |
1465 | ||
1466 | static void update_db_intercept(struct kvm_vcpu *vcpu) | |
1467 | { | |
1468 | struct vcpu_svm *svm = to_svm(vcpu); | |
1469 | ||
1470 | clr_exception_intercept(svm, DB_VECTOR); | |
1471 | clr_exception_intercept(svm, BP_VECTOR); | |
1472 | ||
1473 | if (svm->nmi_singlestep) | |
1474 | set_exception_intercept(svm, DB_VECTOR); | |
1475 | ||
1476 | if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) { | |
1477 | if (vcpu->guest_debug & | |
1478 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) | |
1479 | set_exception_intercept(svm, DB_VECTOR); | |
1480 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) | |
1481 | set_exception_intercept(svm, BP_VECTOR); | |
1482 | } else | |
1483 | vcpu->guest_debug = 0; | |
1484 | } | |
1485 | ||
1486 | static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) | |
1487 | { | |
1488 | struct vcpu_svm *svm = to_svm(vcpu); | |
1489 | ||
1490 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) | |
1491 | svm->vmcb->save.dr7 = dbg->arch.debugreg[7]; | |
1492 | else | |
1493 | svm->vmcb->save.dr7 = vcpu->arch.dr7; | |
1494 | ||
1495 | mark_dirty(svm->vmcb, VMCB_DR); | |
1496 | ||
1497 | update_db_intercept(vcpu); | |
1498 | } | |
1499 | ||
1500 | static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd) | |
1501 | { | |
1502 | if (sd->next_asid > sd->max_asid) { | |
1503 | ++sd->asid_generation; | |
1504 | sd->next_asid = 1; | |
1505 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID; | |
1506 | } | |
1507 | ||
1508 | svm->asid_generation = sd->asid_generation; | |
1509 | svm->vmcb->control.asid = sd->next_asid++; | |
1510 | ||
1511 | mark_dirty(svm->vmcb, VMCB_ASID); | |
1512 | } | |
1513 | ||
1514 | static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value) | |
1515 | { | |
1516 | struct vcpu_svm *svm = to_svm(vcpu); | |
1517 | ||
1518 | svm->vmcb->save.dr7 = value; | |
1519 | mark_dirty(svm->vmcb, VMCB_DR); | |
1520 | } | |
1521 | ||
1522 | static int pf_interception(struct vcpu_svm *svm) | |
1523 | { | |
1524 | u64 fault_address = svm->vmcb->control.exit_info_2; | |
1525 | u32 error_code; | |
1526 | int r = 1; | |
1527 | ||
1528 | switch (svm->apf_reason) { | |
1529 | default: | |
1530 | error_code = svm->vmcb->control.exit_info_1; | |
1531 | ||
1532 | trace_kvm_page_fault(fault_address, error_code); | |
1533 | if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu)) | |
1534 | kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address); | |
1535 | r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code, | |
1536 | svm->vmcb->control.insn_bytes, | |
1537 | svm->vmcb->control.insn_len); | |
1538 | break; | |
1539 | case KVM_PV_REASON_PAGE_NOT_PRESENT: | |
1540 | svm->apf_reason = 0; | |
1541 | local_irq_disable(); | |
1542 | kvm_async_pf_task_wait(fault_address); | |
1543 | local_irq_enable(); | |
1544 | break; | |
1545 | case KVM_PV_REASON_PAGE_READY: | |
1546 | svm->apf_reason = 0; | |
1547 | local_irq_disable(); | |
1548 | kvm_async_pf_task_wake(fault_address); | |
1549 | local_irq_enable(); | |
1550 | break; | |
1551 | } | |
1552 | return r; | |
1553 | } | |
1554 | ||
1555 | static int db_interception(struct vcpu_svm *svm) | |
1556 | { | |
1557 | struct kvm_run *kvm_run = svm->vcpu.run; | |
1558 | ||
1559 | if (!(svm->vcpu.guest_debug & | |
1560 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) && | |
1561 | !svm->nmi_singlestep) { | |
1562 | kvm_queue_exception(&svm->vcpu, DB_VECTOR); | |
1563 | return 1; | |
1564 | } | |
1565 | ||
1566 | if (svm->nmi_singlestep) { | |
1567 | svm->nmi_singlestep = false; | |
1568 | if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP)) | |
1569 | svm->vmcb->save.rflags &= | |
1570 | ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1571 | update_db_intercept(&svm->vcpu); | |
1572 | } | |
1573 | ||
1574 | if (svm->vcpu.guest_debug & | |
1575 | (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) { | |
1576 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
1577 | kvm_run->debug.arch.pc = | |
1578 | svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1579 | kvm_run->debug.arch.exception = DB_VECTOR; | |
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | return 1; | |
1584 | } | |
1585 | ||
1586 | static int bp_interception(struct vcpu_svm *svm) | |
1587 | { | |
1588 | struct kvm_run *kvm_run = svm->vcpu.run; | |
1589 | ||
1590 | kvm_run->exit_reason = KVM_EXIT_DEBUG; | |
1591 | kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip; | |
1592 | kvm_run->debug.arch.exception = BP_VECTOR; | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | static int ud_interception(struct vcpu_svm *svm) | |
1597 | { | |
1598 | int er; | |
1599 | ||
1600 | er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD); | |
1601 | if (er != EMULATE_DONE) | |
1602 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
1603 | return 1; | |
1604 | } | |
1605 | ||
1606 | static void svm_fpu_activate(struct kvm_vcpu *vcpu) | |
1607 | { | |
1608 | struct vcpu_svm *svm = to_svm(vcpu); | |
1609 | ||
1610 | clr_exception_intercept(svm, NM_VECTOR); | |
1611 | ||
1612 | svm->vcpu.fpu_active = 1; | |
1613 | update_cr0_intercept(svm); | |
1614 | } | |
1615 | ||
1616 | static int nm_interception(struct vcpu_svm *svm) | |
1617 | { | |
1618 | svm_fpu_activate(&svm->vcpu); | |
1619 | return 1; | |
1620 | } | |
1621 | ||
1622 | static bool is_erratum_383(void) | |
1623 | { | |
1624 | int err, i; | |
1625 | u64 value; | |
1626 | ||
1627 | if (!erratum_383_found) | |
1628 | return false; | |
1629 | ||
1630 | value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err); | |
1631 | if (err) | |
1632 | return false; | |
1633 | ||
1634 | /* Bit 62 may or may not be set for this mce */ | |
1635 | value &= ~(1ULL << 62); | |
1636 | ||
1637 | if (value != 0xb600000000010015ULL) | |
1638 | return false; | |
1639 | ||
1640 | /* Clear MCi_STATUS registers */ | |
1641 | for (i = 0; i < 6; ++i) | |
1642 | native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0); | |
1643 | ||
1644 | value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err); | |
1645 | if (!err) { | |
1646 | u32 low, high; | |
1647 | ||
1648 | value &= ~(1ULL << 2); | |
1649 | low = lower_32_bits(value); | |
1650 | high = upper_32_bits(value); | |
1651 | ||
1652 | native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high); | |
1653 | } | |
1654 | ||
1655 | /* Flush tlb to evict multi-match entries */ | |
1656 | __flush_tlb_all(); | |
1657 | ||
1658 | return true; | |
1659 | } | |
1660 | ||
1661 | static void svm_handle_mce(struct vcpu_svm *svm) | |
1662 | { | |
1663 | if (is_erratum_383()) { | |
1664 | /* | |
1665 | * Erratum 383 triggered. Guest state is corrupt so kill the | |
1666 | * guest. | |
1667 | */ | |
1668 | pr_err("KVM: Guest triggered AMD Erratum 383\n"); | |
1669 | ||
1670 | kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu); | |
1671 | ||
1672 | return; | |
1673 | } | |
1674 | ||
1675 | /* | |
1676 | * On an #MC intercept the MCE handler is not called automatically in | |
1677 | * the host. So do it by hand here. | |
1678 | */ | |
1679 | asm volatile ( | |
1680 | "int $0x12\n"); | |
1681 | /* not sure if we ever come back to this point */ | |
1682 | ||
1683 | return; | |
1684 | } | |
1685 | ||
1686 | static int mc_interception(struct vcpu_svm *svm) | |
1687 | { | |
1688 | return 1; | |
1689 | } | |
1690 | ||
1691 | static int shutdown_interception(struct vcpu_svm *svm) | |
1692 | { | |
1693 | struct kvm_run *kvm_run = svm->vcpu.run; | |
1694 | ||
1695 | /* | |
1696 | * VMCB is undefined after a SHUTDOWN intercept | |
1697 | * so reinitialize it. | |
1698 | */ | |
1699 | clear_page(svm->vmcb); | |
1700 | init_vmcb(svm); | |
1701 | ||
1702 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static int io_interception(struct vcpu_svm *svm) | |
1707 | { | |
1708 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
1709 | u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */ | |
1710 | int size, in, string; | |
1711 | unsigned port; | |
1712 | ||
1713 | ++svm->vcpu.stat.io_exits; | |
1714 | string = (io_info & SVM_IOIO_STR_MASK) != 0; | |
1715 | in = (io_info & SVM_IOIO_TYPE_MASK) != 0; | |
1716 | if (string || in) | |
1717 | return emulate_instruction(vcpu, 0) == EMULATE_DONE; | |
1718 | ||
1719 | port = io_info >> 16; | |
1720 | size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT; | |
1721 | svm->next_rip = svm->vmcb->control.exit_info_2; | |
1722 | skip_emulated_instruction(&svm->vcpu); | |
1723 | ||
1724 | return kvm_fast_pio_out(vcpu, size, port); | |
1725 | } | |
1726 | ||
1727 | static int nmi_interception(struct vcpu_svm *svm) | |
1728 | { | |
1729 | return 1; | |
1730 | } | |
1731 | ||
1732 | static int intr_interception(struct vcpu_svm *svm) | |
1733 | { | |
1734 | ++svm->vcpu.stat.irq_exits; | |
1735 | return 1; | |
1736 | } | |
1737 | ||
1738 | static int nop_on_interception(struct vcpu_svm *svm) | |
1739 | { | |
1740 | return 1; | |
1741 | } | |
1742 | ||
1743 | static int halt_interception(struct vcpu_svm *svm) | |
1744 | { | |
1745 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 1; | |
1746 | skip_emulated_instruction(&svm->vcpu); | |
1747 | return kvm_emulate_halt(&svm->vcpu); | |
1748 | } | |
1749 | ||
1750 | static int vmmcall_interception(struct vcpu_svm *svm) | |
1751 | { | |
1752 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
1753 | skip_emulated_instruction(&svm->vcpu); | |
1754 | kvm_emulate_hypercall(&svm->vcpu); | |
1755 | return 1; | |
1756 | } | |
1757 | ||
1758 | static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu) | |
1759 | { | |
1760 | struct vcpu_svm *svm = to_svm(vcpu); | |
1761 | ||
1762 | return svm->nested.nested_cr3; | |
1763 | } | |
1764 | ||
1765 | static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu, | |
1766 | unsigned long root) | |
1767 | { | |
1768 | struct vcpu_svm *svm = to_svm(vcpu); | |
1769 | ||
1770 | svm->vmcb->control.nested_cr3 = root; | |
1771 | mark_dirty(svm->vmcb, VMCB_NPT); | |
1772 | svm_flush_tlb(vcpu); | |
1773 | } | |
1774 | ||
1775 | static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu, | |
1776 | struct x86_exception *fault) | |
1777 | { | |
1778 | struct vcpu_svm *svm = to_svm(vcpu); | |
1779 | ||
1780 | svm->vmcb->control.exit_code = SVM_EXIT_NPF; | |
1781 | svm->vmcb->control.exit_code_hi = 0; | |
1782 | svm->vmcb->control.exit_info_1 = fault->error_code; | |
1783 | svm->vmcb->control.exit_info_2 = fault->address; | |
1784 | ||
1785 | nested_svm_vmexit(svm); | |
1786 | } | |
1787 | ||
1788 | static int nested_svm_init_mmu_context(struct kvm_vcpu *vcpu) | |
1789 | { | |
1790 | int r; | |
1791 | ||
1792 | r = kvm_init_shadow_mmu(vcpu, &vcpu->arch.mmu); | |
1793 | ||
1794 | vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3; | |
1795 | vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3; | |
1796 | vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit; | |
1797 | vcpu->arch.mmu.shadow_root_level = get_npt_level(); | |
1798 | vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu; | |
1799 | ||
1800 | return r; | |
1801 | } | |
1802 | ||
1803 | static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu) | |
1804 | { | |
1805 | vcpu->arch.walk_mmu = &vcpu->arch.mmu; | |
1806 | } | |
1807 | ||
1808 | static int nested_svm_check_permissions(struct vcpu_svm *svm) | |
1809 | { | |
1810 | if (!(svm->vcpu.arch.efer & EFER_SVME) | |
1811 | || !is_paging(&svm->vcpu)) { | |
1812 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
1813 | return 1; | |
1814 | } | |
1815 | ||
1816 | if (svm->vmcb->save.cpl) { | |
1817 | kvm_inject_gp(&svm->vcpu, 0); | |
1818 | return 1; | |
1819 | } | |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr, | |
1825 | bool has_error_code, u32 error_code) | |
1826 | { | |
1827 | int vmexit; | |
1828 | ||
1829 | if (!is_guest_mode(&svm->vcpu)) | |
1830 | return 0; | |
1831 | ||
1832 | svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr; | |
1833 | svm->vmcb->control.exit_code_hi = 0; | |
1834 | svm->vmcb->control.exit_info_1 = error_code; | |
1835 | svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2; | |
1836 | ||
1837 | vmexit = nested_svm_intercept(svm); | |
1838 | if (vmexit == NESTED_EXIT_DONE) | |
1839 | svm->nested.exit_required = true; | |
1840 | ||
1841 | return vmexit; | |
1842 | } | |
1843 | ||
1844 | /* This function returns true if it is save to enable the irq window */ | |
1845 | static inline bool nested_svm_intr(struct vcpu_svm *svm) | |
1846 | { | |
1847 | if (!is_guest_mode(&svm->vcpu)) | |
1848 | return true; | |
1849 | ||
1850 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) | |
1851 | return true; | |
1852 | ||
1853 | if (!(svm->vcpu.arch.hflags & HF_HIF_MASK)) | |
1854 | return false; | |
1855 | ||
1856 | /* | |
1857 | * if vmexit was already requested (by intercepted exception | |
1858 | * for instance) do not overwrite it with "external interrupt" | |
1859 | * vmexit. | |
1860 | */ | |
1861 | if (svm->nested.exit_required) | |
1862 | return false; | |
1863 | ||
1864 | svm->vmcb->control.exit_code = SVM_EXIT_INTR; | |
1865 | svm->vmcb->control.exit_info_1 = 0; | |
1866 | svm->vmcb->control.exit_info_2 = 0; | |
1867 | ||
1868 | if (svm->nested.intercept & 1ULL) { | |
1869 | /* | |
1870 | * The #vmexit can't be emulated here directly because this | |
1871 | * code path runs with irqs and preemtion disabled. A | |
1872 | * #vmexit emulation might sleep. Only signal request for | |
1873 | * the #vmexit here. | |
1874 | */ | |
1875 | svm->nested.exit_required = true; | |
1876 | trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip); | |
1877 | return false; | |
1878 | } | |
1879 | ||
1880 | return true; | |
1881 | } | |
1882 | ||
1883 | /* This function returns true if it is save to enable the nmi window */ | |
1884 | static inline bool nested_svm_nmi(struct vcpu_svm *svm) | |
1885 | { | |
1886 | if (!is_guest_mode(&svm->vcpu)) | |
1887 | return true; | |
1888 | ||
1889 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI))) | |
1890 | return true; | |
1891 | ||
1892 | svm->vmcb->control.exit_code = SVM_EXIT_NMI; | |
1893 | svm->nested.exit_required = true; | |
1894 | ||
1895 | return false; | |
1896 | } | |
1897 | ||
1898 | static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page) | |
1899 | { | |
1900 | struct page *page; | |
1901 | ||
1902 | might_sleep(); | |
1903 | ||
1904 | page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT); | |
1905 | if (is_error_page(page)) | |
1906 | goto error; | |
1907 | ||
1908 | *_page = page; | |
1909 | ||
1910 | return kmap(page); | |
1911 | ||
1912 | error: | |
1913 | kvm_release_page_clean(page); | |
1914 | kvm_inject_gp(&svm->vcpu, 0); | |
1915 | ||
1916 | return NULL; | |
1917 | } | |
1918 | ||
1919 | static void nested_svm_unmap(struct page *page) | |
1920 | { | |
1921 | kunmap(page); | |
1922 | kvm_release_page_dirty(page); | |
1923 | } | |
1924 | ||
1925 | static int nested_svm_intercept_ioio(struct vcpu_svm *svm) | |
1926 | { | |
1927 | unsigned port; | |
1928 | u8 val, bit; | |
1929 | u64 gpa; | |
1930 | ||
1931 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT))) | |
1932 | return NESTED_EXIT_HOST; | |
1933 | ||
1934 | port = svm->vmcb->control.exit_info_1 >> 16; | |
1935 | gpa = svm->nested.vmcb_iopm + (port / 8); | |
1936 | bit = port % 8; | |
1937 | val = 0; | |
1938 | ||
1939 | if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, 1)) | |
1940 | val &= (1 << bit); | |
1941 | ||
1942 | return val ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; | |
1943 | } | |
1944 | ||
1945 | static int nested_svm_exit_handled_msr(struct vcpu_svm *svm) | |
1946 | { | |
1947 | u32 offset, msr, value; | |
1948 | int write, mask; | |
1949 | ||
1950 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) | |
1951 | return NESTED_EXIT_HOST; | |
1952 | ||
1953 | msr = svm->vcpu.arch.regs[VCPU_REGS_RCX]; | |
1954 | offset = svm_msrpm_offset(msr); | |
1955 | write = svm->vmcb->control.exit_info_1 & 1; | |
1956 | mask = 1 << ((2 * (msr & 0xf)) + write); | |
1957 | ||
1958 | if (offset == MSR_INVALID) | |
1959 | return NESTED_EXIT_DONE; | |
1960 | ||
1961 | /* Offset is in 32 bit units but need in 8 bit units */ | |
1962 | offset *= 4; | |
1963 | ||
1964 | if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4)) | |
1965 | return NESTED_EXIT_DONE; | |
1966 | ||
1967 | return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; | |
1968 | } | |
1969 | ||
1970 | static int nested_svm_exit_special(struct vcpu_svm *svm) | |
1971 | { | |
1972 | u32 exit_code = svm->vmcb->control.exit_code; | |
1973 | ||
1974 | switch (exit_code) { | |
1975 | case SVM_EXIT_INTR: | |
1976 | case SVM_EXIT_NMI: | |
1977 | case SVM_EXIT_EXCP_BASE + MC_VECTOR: | |
1978 | return NESTED_EXIT_HOST; | |
1979 | case SVM_EXIT_NPF: | |
1980 | /* For now we are always handling NPFs when using them */ | |
1981 | if (npt_enabled) | |
1982 | return NESTED_EXIT_HOST; | |
1983 | break; | |
1984 | case SVM_EXIT_EXCP_BASE + PF_VECTOR: | |
1985 | /* When we're shadowing, trap PFs, but not async PF */ | |
1986 | if (!npt_enabled && svm->apf_reason == 0) | |
1987 | return NESTED_EXIT_HOST; | |
1988 | break; | |
1989 | case SVM_EXIT_EXCP_BASE + NM_VECTOR: | |
1990 | nm_interception(svm); | |
1991 | break; | |
1992 | default: | |
1993 | break; | |
1994 | } | |
1995 | ||
1996 | return NESTED_EXIT_CONTINUE; | |
1997 | } | |
1998 | ||
1999 | /* | |
2000 | * If this function returns true, this #vmexit was already handled | |
2001 | */ | |
2002 | static int nested_svm_intercept(struct vcpu_svm *svm) | |
2003 | { | |
2004 | u32 exit_code = svm->vmcb->control.exit_code; | |
2005 | int vmexit = NESTED_EXIT_HOST; | |
2006 | ||
2007 | switch (exit_code) { | |
2008 | case SVM_EXIT_MSR: | |
2009 | vmexit = nested_svm_exit_handled_msr(svm); | |
2010 | break; | |
2011 | case SVM_EXIT_IOIO: | |
2012 | vmexit = nested_svm_intercept_ioio(svm); | |
2013 | break; | |
2014 | case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: { | |
2015 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0); | |
2016 | if (svm->nested.intercept_cr & bit) | |
2017 | vmexit = NESTED_EXIT_DONE; | |
2018 | break; | |
2019 | } | |
2020 | case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: { | |
2021 | u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0); | |
2022 | if (svm->nested.intercept_dr & bit) | |
2023 | vmexit = NESTED_EXIT_DONE; | |
2024 | break; | |
2025 | } | |
2026 | case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: { | |
2027 | u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE); | |
2028 | if (svm->nested.intercept_exceptions & excp_bits) | |
2029 | vmexit = NESTED_EXIT_DONE; | |
2030 | /* async page fault always cause vmexit */ | |
2031 | else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) && | |
2032 | svm->apf_reason != 0) | |
2033 | vmexit = NESTED_EXIT_DONE; | |
2034 | break; | |
2035 | } | |
2036 | case SVM_EXIT_ERR: { | |
2037 | vmexit = NESTED_EXIT_DONE; | |
2038 | break; | |
2039 | } | |
2040 | default: { | |
2041 | u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR); | |
2042 | if (svm->nested.intercept & exit_bits) | |
2043 | vmexit = NESTED_EXIT_DONE; | |
2044 | } | |
2045 | } | |
2046 | ||
2047 | return vmexit; | |
2048 | } | |
2049 | ||
2050 | static int nested_svm_exit_handled(struct vcpu_svm *svm) | |
2051 | { | |
2052 | int vmexit; | |
2053 | ||
2054 | vmexit = nested_svm_intercept(svm); | |
2055 | ||
2056 | if (vmexit == NESTED_EXIT_DONE) | |
2057 | nested_svm_vmexit(svm); | |
2058 | ||
2059 | return vmexit; | |
2060 | } | |
2061 | ||
2062 | static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb) | |
2063 | { | |
2064 | struct vmcb_control_area *dst = &dst_vmcb->control; | |
2065 | struct vmcb_control_area *from = &from_vmcb->control; | |
2066 | ||
2067 | dst->intercept_cr = from->intercept_cr; | |
2068 | dst->intercept_dr = from->intercept_dr; | |
2069 | dst->intercept_exceptions = from->intercept_exceptions; | |
2070 | dst->intercept = from->intercept; | |
2071 | dst->iopm_base_pa = from->iopm_base_pa; | |
2072 | dst->msrpm_base_pa = from->msrpm_base_pa; | |
2073 | dst->tsc_offset = from->tsc_offset; | |
2074 | dst->asid = from->asid; | |
2075 | dst->tlb_ctl = from->tlb_ctl; | |
2076 | dst->int_ctl = from->int_ctl; | |
2077 | dst->int_vector = from->int_vector; | |
2078 | dst->int_state = from->int_state; | |
2079 | dst->exit_code = from->exit_code; | |
2080 | dst->exit_code_hi = from->exit_code_hi; | |
2081 | dst->exit_info_1 = from->exit_info_1; | |
2082 | dst->exit_info_2 = from->exit_info_2; | |
2083 | dst->exit_int_info = from->exit_int_info; | |
2084 | dst->exit_int_info_err = from->exit_int_info_err; | |
2085 | dst->nested_ctl = from->nested_ctl; | |
2086 | dst->event_inj = from->event_inj; | |
2087 | dst->event_inj_err = from->event_inj_err; | |
2088 | dst->nested_cr3 = from->nested_cr3; | |
2089 | dst->lbr_ctl = from->lbr_ctl; | |
2090 | } | |
2091 | ||
2092 | static int nested_svm_vmexit(struct vcpu_svm *svm) | |
2093 | { | |
2094 | struct vmcb *nested_vmcb; | |
2095 | struct vmcb *hsave = svm->nested.hsave; | |
2096 | struct vmcb *vmcb = svm->vmcb; | |
2097 | struct page *page; | |
2098 | ||
2099 | trace_kvm_nested_vmexit_inject(vmcb->control.exit_code, | |
2100 | vmcb->control.exit_info_1, | |
2101 | vmcb->control.exit_info_2, | |
2102 | vmcb->control.exit_int_info, | |
2103 | vmcb->control.exit_int_info_err); | |
2104 | ||
2105 | nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page); | |
2106 | if (!nested_vmcb) | |
2107 | return 1; | |
2108 | ||
2109 | /* Exit Guest-Mode */ | |
2110 | leave_guest_mode(&svm->vcpu); | |
2111 | svm->nested.vmcb = 0; | |
2112 | ||
2113 | /* Give the current vmcb to the guest */ | |
2114 | disable_gif(svm); | |
2115 | ||
2116 | nested_vmcb->save.es = vmcb->save.es; | |
2117 | nested_vmcb->save.cs = vmcb->save.cs; | |
2118 | nested_vmcb->save.ss = vmcb->save.ss; | |
2119 | nested_vmcb->save.ds = vmcb->save.ds; | |
2120 | nested_vmcb->save.gdtr = vmcb->save.gdtr; | |
2121 | nested_vmcb->save.idtr = vmcb->save.idtr; | |
2122 | nested_vmcb->save.efer = svm->vcpu.arch.efer; | |
2123 | nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu); | |
2124 | nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu); | |
2125 | nested_vmcb->save.cr2 = vmcb->save.cr2; | |
2126 | nested_vmcb->save.cr4 = svm->vcpu.arch.cr4; | |
2127 | nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu); | |
2128 | nested_vmcb->save.rip = vmcb->save.rip; | |
2129 | nested_vmcb->save.rsp = vmcb->save.rsp; | |
2130 | nested_vmcb->save.rax = vmcb->save.rax; | |
2131 | nested_vmcb->save.dr7 = vmcb->save.dr7; | |
2132 | nested_vmcb->save.dr6 = vmcb->save.dr6; | |
2133 | nested_vmcb->save.cpl = vmcb->save.cpl; | |
2134 | ||
2135 | nested_vmcb->control.int_ctl = vmcb->control.int_ctl; | |
2136 | nested_vmcb->control.int_vector = vmcb->control.int_vector; | |
2137 | nested_vmcb->control.int_state = vmcb->control.int_state; | |
2138 | nested_vmcb->control.exit_code = vmcb->control.exit_code; | |
2139 | nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi; | |
2140 | nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1; | |
2141 | nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2; | |
2142 | nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info; | |
2143 | nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err; | |
2144 | nested_vmcb->control.next_rip = vmcb->control.next_rip; | |
2145 | ||
2146 | /* | |
2147 | * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have | |
2148 | * to make sure that we do not lose injected events. So check event_inj | |
2149 | * here and copy it to exit_int_info if it is valid. | |
2150 | * Exit_int_info and event_inj can't be both valid because the case | |
2151 | * below only happens on a VMRUN instruction intercept which has | |
2152 | * no valid exit_int_info set. | |
2153 | */ | |
2154 | if (vmcb->control.event_inj & SVM_EVTINJ_VALID) { | |
2155 | struct vmcb_control_area *nc = &nested_vmcb->control; | |
2156 | ||
2157 | nc->exit_int_info = vmcb->control.event_inj; | |
2158 | nc->exit_int_info_err = vmcb->control.event_inj_err; | |
2159 | } | |
2160 | ||
2161 | nested_vmcb->control.tlb_ctl = 0; | |
2162 | nested_vmcb->control.event_inj = 0; | |
2163 | nested_vmcb->control.event_inj_err = 0; | |
2164 | ||
2165 | /* We always set V_INTR_MASKING and remember the old value in hflags */ | |
2166 | if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK)) | |
2167 | nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK; | |
2168 | ||
2169 | /* Restore the original control entries */ | |
2170 | copy_vmcb_control_area(vmcb, hsave); | |
2171 | ||
2172 | kvm_clear_exception_queue(&svm->vcpu); | |
2173 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2174 | ||
2175 | svm->nested.nested_cr3 = 0; | |
2176 | ||
2177 | /* Restore selected save entries */ | |
2178 | svm->vmcb->save.es = hsave->save.es; | |
2179 | svm->vmcb->save.cs = hsave->save.cs; | |
2180 | svm->vmcb->save.ss = hsave->save.ss; | |
2181 | svm->vmcb->save.ds = hsave->save.ds; | |
2182 | svm->vmcb->save.gdtr = hsave->save.gdtr; | |
2183 | svm->vmcb->save.idtr = hsave->save.idtr; | |
2184 | kvm_set_rflags(&svm->vcpu, hsave->save.rflags); | |
2185 | svm_set_efer(&svm->vcpu, hsave->save.efer); | |
2186 | svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE); | |
2187 | svm_set_cr4(&svm->vcpu, hsave->save.cr4); | |
2188 | if (npt_enabled) { | |
2189 | svm->vmcb->save.cr3 = hsave->save.cr3; | |
2190 | svm->vcpu.arch.cr3 = hsave->save.cr3; | |
2191 | } else { | |
2192 | (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3); | |
2193 | } | |
2194 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax); | |
2195 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp); | |
2196 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip); | |
2197 | svm->vmcb->save.dr7 = 0; | |
2198 | svm->vmcb->save.cpl = 0; | |
2199 | svm->vmcb->control.exit_int_info = 0; | |
2200 | ||
2201 | mark_all_dirty(svm->vmcb); | |
2202 | ||
2203 | nested_svm_unmap(page); | |
2204 | ||
2205 | nested_svm_uninit_mmu_context(&svm->vcpu); | |
2206 | kvm_mmu_reset_context(&svm->vcpu); | |
2207 | kvm_mmu_load(&svm->vcpu); | |
2208 | ||
2209 | return 0; | |
2210 | } | |
2211 | ||
2212 | static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) | |
2213 | { | |
2214 | /* | |
2215 | * This function merges the msr permission bitmaps of kvm and the | |
2216 | * nested vmcb. It is omptimized in that it only merges the parts where | |
2217 | * the kvm msr permission bitmap may contain zero bits | |
2218 | */ | |
2219 | int i; | |
2220 | ||
2221 | if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT))) | |
2222 | return true; | |
2223 | ||
2224 | for (i = 0; i < MSRPM_OFFSETS; i++) { | |
2225 | u32 value, p; | |
2226 | u64 offset; | |
2227 | ||
2228 | if (msrpm_offsets[i] == 0xffffffff) | |
2229 | break; | |
2230 | ||
2231 | p = msrpm_offsets[i]; | |
2232 | offset = svm->nested.vmcb_msrpm + (p * 4); | |
2233 | ||
2234 | if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4)) | |
2235 | return false; | |
2236 | ||
2237 | svm->nested.msrpm[p] = svm->msrpm[p] | value; | |
2238 | } | |
2239 | ||
2240 | svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm); | |
2241 | ||
2242 | return true; | |
2243 | } | |
2244 | ||
2245 | static bool nested_vmcb_checks(struct vmcb *vmcb) | |
2246 | { | |
2247 | if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0) | |
2248 | return false; | |
2249 | ||
2250 | if (vmcb->control.asid == 0) | |
2251 | return false; | |
2252 | ||
2253 | if (vmcb->control.nested_ctl && !npt_enabled) | |
2254 | return false; | |
2255 | ||
2256 | return true; | |
2257 | } | |
2258 | ||
2259 | static bool nested_svm_vmrun(struct vcpu_svm *svm) | |
2260 | { | |
2261 | struct vmcb *nested_vmcb; | |
2262 | struct vmcb *hsave = svm->nested.hsave; | |
2263 | struct vmcb *vmcb = svm->vmcb; | |
2264 | struct page *page; | |
2265 | u64 vmcb_gpa; | |
2266 | ||
2267 | vmcb_gpa = svm->vmcb->save.rax; | |
2268 | ||
2269 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); | |
2270 | if (!nested_vmcb) | |
2271 | return false; | |
2272 | ||
2273 | if (!nested_vmcb_checks(nested_vmcb)) { | |
2274 | nested_vmcb->control.exit_code = SVM_EXIT_ERR; | |
2275 | nested_vmcb->control.exit_code_hi = 0; | |
2276 | nested_vmcb->control.exit_info_1 = 0; | |
2277 | nested_vmcb->control.exit_info_2 = 0; | |
2278 | ||
2279 | nested_svm_unmap(page); | |
2280 | ||
2281 | return false; | |
2282 | } | |
2283 | ||
2284 | trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa, | |
2285 | nested_vmcb->save.rip, | |
2286 | nested_vmcb->control.int_ctl, | |
2287 | nested_vmcb->control.event_inj, | |
2288 | nested_vmcb->control.nested_ctl); | |
2289 | ||
2290 | trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff, | |
2291 | nested_vmcb->control.intercept_cr >> 16, | |
2292 | nested_vmcb->control.intercept_exceptions, | |
2293 | nested_vmcb->control.intercept); | |
2294 | ||
2295 | /* Clear internal status */ | |
2296 | kvm_clear_exception_queue(&svm->vcpu); | |
2297 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2298 | ||
2299 | /* | |
2300 | * Save the old vmcb, so we don't need to pick what we save, but can | |
2301 | * restore everything when a VMEXIT occurs | |
2302 | */ | |
2303 | hsave->save.es = vmcb->save.es; | |
2304 | hsave->save.cs = vmcb->save.cs; | |
2305 | hsave->save.ss = vmcb->save.ss; | |
2306 | hsave->save.ds = vmcb->save.ds; | |
2307 | hsave->save.gdtr = vmcb->save.gdtr; | |
2308 | hsave->save.idtr = vmcb->save.idtr; | |
2309 | hsave->save.efer = svm->vcpu.arch.efer; | |
2310 | hsave->save.cr0 = kvm_read_cr0(&svm->vcpu); | |
2311 | hsave->save.cr4 = svm->vcpu.arch.cr4; | |
2312 | hsave->save.rflags = kvm_get_rflags(&svm->vcpu); | |
2313 | hsave->save.rip = kvm_rip_read(&svm->vcpu); | |
2314 | hsave->save.rsp = vmcb->save.rsp; | |
2315 | hsave->save.rax = vmcb->save.rax; | |
2316 | if (npt_enabled) | |
2317 | hsave->save.cr3 = vmcb->save.cr3; | |
2318 | else | |
2319 | hsave->save.cr3 = kvm_read_cr3(&svm->vcpu); | |
2320 | ||
2321 | copy_vmcb_control_area(hsave, vmcb); | |
2322 | ||
2323 | if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF) | |
2324 | svm->vcpu.arch.hflags |= HF_HIF_MASK; | |
2325 | else | |
2326 | svm->vcpu.arch.hflags &= ~HF_HIF_MASK; | |
2327 | ||
2328 | if (nested_vmcb->control.nested_ctl) { | |
2329 | kvm_mmu_unload(&svm->vcpu); | |
2330 | svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3; | |
2331 | nested_svm_init_mmu_context(&svm->vcpu); | |
2332 | } | |
2333 | ||
2334 | /* Load the nested guest state */ | |
2335 | svm->vmcb->save.es = nested_vmcb->save.es; | |
2336 | svm->vmcb->save.cs = nested_vmcb->save.cs; | |
2337 | svm->vmcb->save.ss = nested_vmcb->save.ss; | |
2338 | svm->vmcb->save.ds = nested_vmcb->save.ds; | |
2339 | svm->vmcb->save.gdtr = nested_vmcb->save.gdtr; | |
2340 | svm->vmcb->save.idtr = nested_vmcb->save.idtr; | |
2341 | kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags); | |
2342 | svm_set_efer(&svm->vcpu, nested_vmcb->save.efer); | |
2343 | svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0); | |
2344 | svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4); | |
2345 | if (npt_enabled) { | |
2346 | svm->vmcb->save.cr3 = nested_vmcb->save.cr3; | |
2347 | svm->vcpu.arch.cr3 = nested_vmcb->save.cr3; | |
2348 | } else | |
2349 | (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); | |
2350 | ||
2351 | /* Guest paging mode is active - reset mmu */ | |
2352 | kvm_mmu_reset_context(&svm->vcpu); | |
2353 | ||
2354 | svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; | |
2355 | kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); | |
2356 | kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); | |
2357 | kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); | |
2358 | ||
2359 | /* In case we don't even reach vcpu_run, the fields are not updated */ | |
2360 | svm->vmcb->save.rax = nested_vmcb->save.rax; | |
2361 | svm->vmcb->save.rsp = nested_vmcb->save.rsp; | |
2362 | svm->vmcb->save.rip = nested_vmcb->save.rip; | |
2363 | svm->vmcb->save.dr7 = nested_vmcb->save.dr7; | |
2364 | svm->vmcb->save.dr6 = nested_vmcb->save.dr6; | |
2365 | svm->vmcb->save.cpl = nested_vmcb->save.cpl; | |
2366 | ||
2367 | svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL; | |
2368 | svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL; | |
2369 | ||
2370 | /* cache intercepts */ | |
2371 | svm->nested.intercept_cr = nested_vmcb->control.intercept_cr; | |
2372 | svm->nested.intercept_dr = nested_vmcb->control.intercept_dr; | |
2373 | svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions; | |
2374 | svm->nested.intercept = nested_vmcb->control.intercept; | |
2375 | ||
2376 | svm_flush_tlb(&svm->vcpu); | |
2377 | svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK; | |
2378 | if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK) | |
2379 | svm->vcpu.arch.hflags |= HF_VINTR_MASK; | |
2380 | else | |
2381 | svm->vcpu.arch.hflags &= ~HF_VINTR_MASK; | |
2382 | ||
2383 | if (svm->vcpu.arch.hflags & HF_VINTR_MASK) { | |
2384 | /* We only want the cr8 intercept bits of the guest */ | |
2385 | clr_cr_intercept(svm, INTERCEPT_CR8_READ); | |
2386 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
2387 | } | |
2388 | ||
2389 | /* We don't want to see VMMCALLs from a nested guest */ | |
2390 | clr_intercept(svm, INTERCEPT_VMMCALL); | |
2391 | ||
2392 | svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl; | |
2393 | svm->vmcb->control.int_vector = nested_vmcb->control.int_vector; | |
2394 | svm->vmcb->control.int_state = nested_vmcb->control.int_state; | |
2395 | svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset; | |
2396 | svm->vmcb->control.event_inj = nested_vmcb->control.event_inj; | |
2397 | svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err; | |
2398 | ||
2399 | nested_svm_unmap(page); | |
2400 | ||
2401 | /* Enter Guest-Mode */ | |
2402 | enter_guest_mode(&svm->vcpu); | |
2403 | ||
2404 | /* | |
2405 | * Merge guest and host intercepts - must be called with vcpu in | |
2406 | * guest-mode to take affect here | |
2407 | */ | |
2408 | recalc_intercepts(svm); | |
2409 | ||
2410 | svm->nested.vmcb = vmcb_gpa; | |
2411 | ||
2412 | enable_gif(svm); | |
2413 | ||
2414 | mark_all_dirty(svm->vmcb); | |
2415 | ||
2416 | return true; | |
2417 | } | |
2418 | ||
2419 | static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb) | |
2420 | { | |
2421 | to_vmcb->save.fs = from_vmcb->save.fs; | |
2422 | to_vmcb->save.gs = from_vmcb->save.gs; | |
2423 | to_vmcb->save.tr = from_vmcb->save.tr; | |
2424 | to_vmcb->save.ldtr = from_vmcb->save.ldtr; | |
2425 | to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base; | |
2426 | to_vmcb->save.star = from_vmcb->save.star; | |
2427 | to_vmcb->save.lstar = from_vmcb->save.lstar; | |
2428 | to_vmcb->save.cstar = from_vmcb->save.cstar; | |
2429 | to_vmcb->save.sfmask = from_vmcb->save.sfmask; | |
2430 | to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs; | |
2431 | to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp; | |
2432 | to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip; | |
2433 | } | |
2434 | ||
2435 | static int vmload_interception(struct vcpu_svm *svm) | |
2436 | { | |
2437 | struct vmcb *nested_vmcb; | |
2438 | struct page *page; | |
2439 | ||
2440 | if (nested_svm_check_permissions(svm)) | |
2441 | return 1; | |
2442 | ||
2443 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2444 | skip_emulated_instruction(&svm->vcpu); | |
2445 | ||
2446 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); | |
2447 | if (!nested_vmcb) | |
2448 | return 1; | |
2449 | ||
2450 | nested_svm_vmloadsave(nested_vmcb, svm->vmcb); | |
2451 | nested_svm_unmap(page); | |
2452 | ||
2453 | return 1; | |
2454 | } | |
2455 | ||
2456 | static int vmsave_interception(struct vcpu_svm *svm) | |
2457 | { | |
2458 | struct vmcb *nested_vmcb; | |
2459 | struct page *page; | |
2460 | ||
2461 | if (nested_svm_check_permissions(svm)) | |
2462 | return 1; | |
2463 | ||
2464 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2465 | skip_emulated_instruction(&svm->vcpu); | |
2466 | ||
2467 | nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); | |
2468 | if (!nested_vmcb) | |
2469 | return 1; | |
2470 | ||
2471 | nested_svm_vmloadsave(svm->vmcb, nested_vmcb); | |
2472 | nested_svm_unmap(page); | |
2473 | ||
2474 | return 1; | |
2475 | } | |
2476 | ||
2477 | static int vmrun_interception(struct vcpu_svm *svm) | |
2478 | { | |
2479 | if (nested_svm_check_permissions(svm)) | |
2480 | return 1; | |
2481 | ||
2482 | /* Save rip after vmrun instruction */ | |
2483 | kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3); | |
2484 | ||
2485 | if (!nested_svm_vmrun(svm)) | |
2486 | return 1; | |
2487 | ||
2488 | if (!nested_svm_vmrun_msrpm(svm)) | |
2489 | goto failed; | |
2490 | ||
2491 | return 1; | |
2492 | ||
2493 | failed: | |
2494 | ||
2495 | svm->vmcb->control.exit_code = SVM_EXIT_ERR; | |
2496 | svm->vmcb->control.exit_code_hi = 0; | |
2497 | svm->vmcb->control.exit_info_1 = 0; | |
2498 | svm->vmcb->control.exit_info_2 = 0; | |
2499 | ||
2500 | nested_svm_vmexit(svm); | |
2501 | ||
2502 | return 1; | |
2503 | } | |
2504 | ||
2505 | static int stgi_interception(struct vcpu_svm *svm) | |
2506 | { | |
2507 | if (nested_svm_check_permissions(svm)) | |
2508 | return 1; | |
2509 | ||
2510 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2511 | skip_emulated_instruction(&svm->vcpu); | |
2512 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); | |
2513 | ||
2514 | enable_gif(svm); | |
2515 | ||
2516 | return 1; | |
2517 | } | |
2518 | ||
2519 | static int clgi_interception(struct vcpu_svm *svm) | |
2520 | { | |
2521 | if (nested_svm_check_permissions(svm)) | |
2522 | return 1; | |
2523 | ||
2524 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2525 | skip_emulated_instruction(&svm->vcpu); | |
2526 | ||
2527 | disable_gif(svm); | |
2528 | ||
2529 | /* After a CLGI no interrupts should come */ | |
2530 | svm_clear_vintr(svm); | |
2531 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; | |
2532 | ||
2533 | mark_dirty(svm->vmcb, VMCB_INTR); | |
2534 | ||
2535 | return 1; | |
2536 | } | |
2537 | ||
2538 | static int invlpga_interception(struct vcpu_svm *svm) | |
2539 | { | |
2540 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
2541 | ||
2542 | trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX], | |
2543 | vcpu->arch.regs[VCPU_REGS_RAX]); | |
2544 | ||
2545 | /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */ | |
2546 | kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]); | |
2547 | ||
2548 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2549 | skip_emulated_instruction(&svm->vcpu); | |
2550 | return 1; | |
2551 | } | |
2552 | ||
2553 | static int skinit_interception(struct vcpu_svm *svm) | |
2554 | { | |
2555 | trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]); | |
2556 | ||
2557 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2558 | return 1; | |
2559 | } | |
2560 | ||
2561 | static int xsetbv_interception(struct vcpu_svm *svm) | |
2562 | { | |
2563 | u64 new_bv = kvm_read_edx_eax(&svm->vcpu); | |
2564 | u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX); | |
2565 | ||
2566 | if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) { | |
2567 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; | |
2568 | skip_emulated_instruction(&svm->vcpu); | |
2569 | } | |
2570 | ||
2571 | return 1; | |
2572 | } | |
2573 | ||
2574 | static int invalid_op_interception(struct vcpu_svm *svm) | |
2575 | { | |
2576 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2577 | return 1; | |
2578 | } | |
2579 | ||
2580 | static int task_switch_interception(struct vcpu_svm *svm) | |
2581 | { | |
2582 | u16 tss_selector; | |
2583 | int reason; | |
2584 | int int_type = svm->vmcb->control.exit_int_info & | |
2585 | SVM_EXITINTINFO_TYPE_MASK; | |
2586 | int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK; | |
2587 | uint32_t type = | |
2588 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK; | |
2589 | uint32_t idt_v = | |
2590 | svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID; | |
2591 | bool has_error_code = false; | |
2592 | u32 error_code = 0; | |
2593 | ||
2594 | tss_selector = (u16)svm->vmcb->control.exit_info_1; | |
2595 | ||
2596 | if (svm->vmcb->control.exit_info_2 & | |
2597 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET)) | |
2598 | reason = TASK_SWITCH_IRET; | |
2599 | else if (svm->vmcb->control.exit_info_2 & | |
2600 | (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP)) | |
2601 | reason = TASK_SWITCH_JMP; | |
2602 | else if (idt_v) | |
2603 | reason = TASK_SWITCH_GATE; | |
2604 | else | |
2605 | reason = TASK_SWITCH_CALL; | |
2606 | ||
2607 | if (reason == TASK_SWITCH_GATE) { | |
2608 | switch (type) { | |
2609 | case SVM_EXITINTINFO_TYPE_NMI: | |
2610 | svm->vcpu.arch.nmi_injected = false; | |
2611 | break; | |
2612 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
2613 | if (svm->vmcb->control.exit_info_2 & | |
2614 | (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) { | |
2615 | has_error_code = true; | |
2616 | error_code = | |
2617 | (u32)svm->vmcb->control.exit_info_2; | |
2618 | } | |
2619 | kvm_clear_exception_queue(&svm->vcpu); | |
2620 | break; | |
2621 | case SVM_EXITINTINFO_TYPE_INTR: | |
2622 | kvm_clear_interrupt_queue(&svm->vcpu); | |
2623 | break; | |
2624 | default: | |
2625 | break; | |
2626 | } | |
2627 | } | |
2628 | ||
2629 | if (reason != TASK_SWITCH_GATE || | |
2630 | int_type == SVM_EXITINTINFO_TYPE_SOFT || | |
2631 | (int_type == SVM_EXITINTINFO_TYPE_EXEPT && | |
2632 | (int_vec == OF_VECTOR || int_vec == BP_VECTOR))) | |
2633 | skip_emulated_instruction(&svm->vcpu); | |
2634 | ||
2635 | if (kvm_task_switch(&svm->vcpu, tss_selector, reason, | |
2636 | has_error_code, error_code) == EMULATE_FAIL) { | |
2637 | svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2638 | svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION; | |
2639 | svm->vcpu.run->internal.ndata = 0; | |
2640 | return 0; | |
2641 | } | |
2642 | return 1; | |
2643 | } | |
2644 | ||
2645 | static int cpuid_interception(struct vcpu_svm *svm) | |
2646 | { | |
2647 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; | |
2648 | kvm_emulate_cpuid(&svm->vcpu); | |
2649 | return 1; | |
2650 | } | |
2651 | ||
2652 | static int iret_interception(struct vcpu_svm *svm) | |
2653 | { | |
2654 | ++svm->vcpu.stat.nmi_window_exits; | |
2655 | clr_intercept(svm, INTERCEPT_IRET); | |
2656 | svm->vcpu.arch.hflags |= HF_IRET_MASK; | |
2657 | svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu); | |
2658 | return 1; | |
2659 | } | |
2660 | ||
2661 | static int invlpg_interception(struct vcpu_svm *svm) | |
2662 | { | |
2663 | if (!static_cpu_has(X86_FEATURE_DECODEASSISTS)) | |
2664 | return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE; | |
2665 | ||
2666 | kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1); | |
2667 | skip_emulated_instruction(&svm->vcpu); | |
2668 | return 1; | |
2669 | } | |
2670 | ||
2671 | static int emulate_on_interception(struct vcpu_svm *svm) | |
2672 | { | |
2673 | return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE; | |
2674 | } | |
2675 | ||
2676 | #define CR_VALID (1ULL << 63) | |
2677 | ||
2678 | static int cr_interception(struct vcpu_svm *svm) | |
2679 | { | |
2680 | int reg, cr; | |
2681 | unsigned long val; | |
2682 | int err; | |
2683 | ||
2684 | if (!static_cpu_has(X86_FEATURE_DECODEASSISTS)) | |
2685 | return emulate_on_interception(svm); | |
2686 | ||
2687 | if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0)) | |
2688 | return emulate_on_interception(svm); | |
2689 | ||
2690 | reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK; | |
2691 | cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0; | |
2692 | ||
2693 | err = 0; | |
2694 | if (cr >= 16) { /* mov to cr */ | |
2695 | cr -= 16; | |
2696 | val = kvm_register_read(&svm->vcpu, reg); | |
2697 | switch (cr) { | |
2698 | case 0: | |
2699 | err = kvm_set_cr0(&svm->vcpu, val); | |
2700 | break; | |
2701 | case 3: | |
2702 | err = kvm_set_cr3(&svm->vcpu, val); | |
2703 | break; | |
2704 | case 4: | |
2705 | err = kvm_set_cr4(&svm->vcpu, val); | |
2706 | break; | |
2707 | case 8: | |
2708 | err = kvm_set_cr8(&svm->vcpu, val); | |
2709 | break; | |
2710 | default: | |
2711 | WARN(1, "unhandled write to CR%d", cr); | |
2712 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2713 | return 1; | |
2714 | } | |
2715 | } else { /* mov from cr */ | |
2716 | switch (cr) { | |
2717 | case 0: | |
2718 | val = kvm_read_cr0(&svm->vcpu); | |
2719 | break; | |
2720 | case 2: | |
2721 | val = svm->vcpu.arch.cr2; | |
2722 | break; | |
2723 | case 3: | |
2724 | val = kvm_read_cr3(&svm->vcpu); | |
2725 | break; | |
2726 | case 4: | |
2727 | val = kvm_read_cr4(&svm->vcpu); | |
2728 | break; | |
2729 | case 8: | |
2730 | val = kvm_get_cr8(&svm->vcpu); | |
2731 | break; | |
2732 | default: | |
2733 | WARN(1, "unhandled read from CR%d", cr); | |
2734 | kvm_queue_exception(&svm->vcpu, UD_VECTOR); | |
2735 | return 1; | |
2736 | } | |
2737 | kvm_register_write(&svm->vcpu, reg, val); | |
2738 | } | |
2739 | kvm_complete_insn_gp(&svm->vcpu, err); | |
2740 | ||
2741 | return 1; | |
2742 | } | |
2743 | ||
2744 | static int cr0_write_interception(struct vcpu_svm *svm) | |
2745 | { | |
2746 | struct kvm_vcpu *vcpu = &svm->vcpu; | |
2747 | int r; | |
2748 | ||
2749 | r = cr_interception(svm); | |
2750 | ||
2751 | if (svm->nested.vmexit_rip) { | |
2752 | kvm_register_write(vcpu, VCPU_REGS_RIP, svm->nested.vmexit_rip); | |
2753 | kvm_register_write(vcpu, VCPU_REGS_RSP, svm->nested.vmexit_rsp); | |
2754 | kvm_register_write(vcpu, VCPU_REGS_RAX, svm->nested.vmexit_rax); | |
2755 | svm->nested.vmexit_rip = 0; | |
2756 | } | |
2757 | ||
2758 | return r; | |
2759 | } | |
2760 | ||
2761 | static int dr_interception(struct vcpu_svm *svm) | |
2762 | { | |
2763 | int reg, dr; | |
2764 | unsigned long val; | |
2765 | int err; | |
2766 | ||
2767 | if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS)) | |
2768 | return emulate_on_interception(svm); | |
2769 | ||
2770 | reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK; | |
2771 | dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0; | |
2772 | ||
2773 | if (dr >= 16) { /* mov to DRn */ | |
2774 | val = kvm_register_read(&svm->vcpu, reg); | |
2775 | kvm_set_dr(&svm->vcpu, dr - 16, val); | |
2776 | } else { | |
2777 | err = kvm_get_dr(&svm->vcpu, dr, &val); | |
2778 | if (!err) | |
2779 | kvm_register_write(&svm->vcpu, reg, val); | |
2780 | } | |
2781 | ||
2782 | skip_emulated_instruction(&svm->vcpu); | |
2783 | ||
2784 | return 1; | |
2785 | } | |
2786 | ||
2787 | static int cr8_write_interception(struct vcpu_svm *svm) | |
2788 | { | |
2789 | struct kvm_run *kvm_run = svm->vcpu.run; | |
2790 | int r; | |
2791 | ||
2792 | u8 cr8_prev = kvm_get_cr8(&svm->vcpu); | |
2793 | /* instruction emulation calls kvm_set_cr8() */ | |
2794 | r = cr_interception(svm); | |
2795 | if (irqchip_in_kernel(svm->vcpu.kvm)) { | |
2796 | clr_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
2797 | return r; | |
2798 | } | |
2799 | if (cr8_prev <= kvm_get_cr8(&svm->vcpu)) | |
2800 | return r; | |
2801 | kvm_run->exit_reason = KVM_EXIT_SET_TPR; | |
2802 | return 0; | |
2803 | } | |
2804 | ||
2805 | static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data) | |
2806 | { | |
2807 | struct vcpu_svm *svm = to_svm(vcpu); | |
2808 | ||
2809 | switch (ecx) { | |
2810 | case MSR_IA32_TSC: { | |
2811 | struct vmcb *vmcb = get_host_vmcb(svm); | |
2812 | ||
2813 | *data = vmcb->control.tsc_offset + native_read_tsc(); | |
2814 | break; | |
2815 | } | |
2816 | case MSR_STAR: | |
2817 | *data = svm->vmcb->save.star; | |
2818 | break; | |
2819 | #ifdef CONFIG_X86_64 | |
2820 | case MSR_LSTAR: | |
2821 | *data = svm->vmcb->save.lstar; | |
2822 | break; | |
2823 | case MSR_CSTAR: | |
2824 | *data = svm->vmcb->save.cstar; | |
2825 | break; | |
2826 | case MSR_KERNEL_GS_BASE: | |
2827 | *data = svm->vmcb->save.kernel_gs_base; | |
2828 | break; | |
2829 | case MSR_SYSCALL_MASK: | |
2830 | *data = svm->vmcb->save.sfmask; | |
2831 | break; | |
2832 | #endif | |
2833 | case MSR_IA32_SYSENTER_CS: | |
2834 | *data = svm->vmcb->save.sysenter_cs; | |
2835 | break; | |
2836 | case MSR_IA32_SYSENTER_EIP: | |
2837 | *data = svm->sysenter_eip; | |
2838 | break; | |
2839 | case MSR_IA32_SYSENTER_ESP: | |
2840 | *data = svm->sysenter_esp; | |
2841 | break; | |
2842 | /* | |
2843 | * Nobody will change the following 5 values in the VMCB so we can | |
2844 | * safely return them on rdmsr. They will always be 0 until LBRV is | |
2845 | * implemented. | |
2846 | */ | |
2847 | case MSR_IA32_DEBUGCTLMSR: | |
2848 | *data = svm->vmcb->save.dbgctl; | |
2849 | break; | |
2850 | case MSR_IA32_LASTBRANCHFROMIP: | |
2851 | *data = svm->vmcb->save.br_from; | |
2852 | break; | |
2853 | case MSR_IA32_LASTBRANCHTOIP: | |
2854 | *data = svm->vmcb->save.br_to; | |
2855 | break; | |
2856 | case MSR_IA32_LASTINTFROMIP: | |
2857 | *data = svm->vmcb->save.last_excp_from; | |
2858 | break; | |
2859 | case MSR_IA32_LASTINTTOIP: | |
2860 | *data = svm->vmcb->save.last_excp_to; | |
2861 | break; | |
2862 | case MSR_VM_HSAVE_PA: | |
2863 | *data = svm->nested.hsave_msr; | |
2864 | break; | |
2865 | case MSR_VM_CR: | |
2866 | *data = svm->nested.vm_cr_msr; | |
2867 | break; | |
2868 | case MSR_IA32_UCODE_REV: | |
2869 | *data = 0x01000065; | |
2870 | break; | |
2871 | default: | |
2872 | return kvm_get_msr_common(vcpu, ecx, data); | |
2873 | } | |
2874 | return 0; | |
2875 | } | |
2876 | ||
2877 | static int rdmsr_interception(struct vcpu_svm *svm) | |
2878 | { | |
2879 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; | |
2880 | u64 data; | |
2881 | ||
2882 | if (svm_get_msr(&svm->vcpu, ecx, &data)) { | |
2883 | trace_kvm_msr_read_ex(ecx); | |
2884 | kvm_inject_gp(&svm->vcpu, 0); | |
2885 | } else { | |
2886 | trace_kvm_msr_read(ecx, data); | |
2887 | ||
2888 | svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff; | |
2889 | svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32; | |
2890 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; | |
2891 | skip_emulated_instruction(&svm->vcpu); | |
2892 | } | |
2893 | return 1; | |
2894 | } | |
2895 | ||
2896 | static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data) | |
2897 | { | |
2898 | struct vcpu_svm *svm = to_svm(vcpu); | |
2899 | int svm_dis, chg_mask; | |
2900 | ||
2901 | if (data & ~SVM_VM_CR_VALID_MASK) | |
2902 | return 1; | |
2903 | ||
2904 | chg_mask = SVM_VM_CR_VALID_MASK; | |
2905 | ||
2906 | if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK) | |
2907 | chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK); | |
2908 | ||
2909 | svm->nested.vm_cr_msr &= ~chg_mask; | |
2910 | svm->nested.vm_cr_msr |= (data & chg_mask); | |
2911 | ||
2912 | svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK; | |
2913 | ||
2914 | /* check for svm_disable while efer.svme is set */ | |
2915 | if (svm_dis && (vcpu->arch.efer & EFER_SVME)) | |
2916 | return 1; | |
2917 | ||
2918 | return 0; | |
2919 | } | |
2920 | ||
2921 | static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data) | |
2922 | { | |
2923 | struct vcpu_svm *svm = to_svm(vcpu); | |
2924 | ||
2925 | switch (ecx) { | |
2926 | case MSR_IA32_TSC: | |
2927 | kvm_write_tsc(vcpu, data); | |
2928 | break; | |
2929 | case MSR_STAR: | |
2930 | svm->vmcb->save.star = data; | |
2931 | break; | |
2932 | #ifdef CONFIG_X86_64 | |
2933 | case MSR_LSTAR: | |
2934 | svm->vmcb->save.lstar = data; | |
2935 | break; | |
2936 | case MSR_CSTAR: | |
2937 | svm->vmcb->save.cstar = data; | |
2938 | break; | |
2939 | case MSR_KERNEL_GS_BASE: | |
2940 | svm->vmcb->save.kernel_gs_base = data; | |
2941 | break; | |
2942 | case MSR_SYSCALL_MASK: | |
2943 | svm->vmcb->save.sfmask = data; | |
2944 | break; | |
2945 | #endif | |
2946 | case MSR_IA32_SYSENTER_CS: | |
2947 | svm->vmcb->save.sysenter_cs = data; | |
2948 | break; | |
2949 | case MSR_IA32_SYSENTER_EIP: | |
2950 | svm->sysenter_eip = data; | |
2951 | svm->vmcb->save.sysenter_eip = data; | |
2952 | break; | |
2953 | case MSR_IA32_SYSENTER_ESP: | |
2954 | svm->sysenter_esp = data; | |
2955 | svm->vmcb->save.sysenter_esp = data; | |
2956 | break; | |
2957 | case MSR_IA32_DEBUGCTLMSR: | |
2958 | if (!boot_cpu_has(X86_FEATURE_LBRV)) { | |
2959 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n", | |
2960 | __func__, data); | |
2961 | break; | |
2962 | } | |
2963 | if (data & DEBUGCTL_RESERVED_BITS) | |
2964 | return 1; | |
2965 | ||
2966 | svm->vmcb->save.dbgctl = data; | |
2967 | mark_dirty(svm->vmcb, VMCB_LBR); | |
2968 | if (data & (1ULL<<0)) | |
2969 | svm_enable_lbrv(svm); | |
2970 | else | |
2971 | svm_disable_lbrv(svm); | |
2972 | break; | |
2973 | case MSR_VM_HSAVE_PA: | |
2974 | svm->nested.hsave_msr = data; | |
2975 | break; | |
2976 | case MSR_VM_CR: | |
2977 | return svm_set_vm_cr(vcpu, data); | |
2978 | case MSR_VM_IGNNE: | |
2979 | pr_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data); | |
2980 | break; | |
2981 | default: | |
2982 | return kvm_set_msr_common(vcpu, ecx, data); | |
2983 | } | |
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | static int wrmsr_interception(struct vcpu_svm *svm) | |
2988 | { | |
2989 | u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX]; | |
2990 | u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u) | |
2991 | | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32); | |
2992 | ||
2993 | ||
2994 | svm->next_rip = kvm_rip_read(&svm->vcpu) + 2; | |
2995 | if (svm_set_msr(&svm->vcpu, ecx, data)) { | |
2996 | trace_kvm_msr_write_ex(ecx, data); | |
2997 | kvm_inject_gp(&svm->vcpu, 0); | |
2998 | } else { | |
2999 | trace_kvm_msr_write(ecx, data); | |
3000 | skip_emulated_instruction(&svm->vcpu); | |
3001 | } | |
3002 | return 1; | |
3003 | } | |
3004 | ||
3005 | static int msr_interception(struct vcpu_svm *svm) | |
3006 | { | |
3007 | if (svm->vmcb->control.exit_info_1) | |
3008 | return wrmsr_interception(svm); | |
3009 | else | |
3010 | return rdmsr_interception(svm); | |
3011 | } | |
3012 | ||
3013 | static int interrupt_window_interception(struct vcpu_svm *svm) | |
3014 | { | |
3015 | struct kvm_run *kvm_run = svm->vcpu.run; | |
3016 | ||
3017 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); | |
3018 | svm_clear_vintr(svm); | |
3019 | svm->vmcb->control.int_ctl &= ~V_IRQ_MASK; | |
3020 | mark_dirty(svm->vmcb, VMCB_INTR); | |
3021 | /* | |
3022 | * If the user space waits to inject interrupts, exit as soon as | |
3023 | * possible | |
3024 | */ | |
3025 | if (!irqchip_in_kernel(svm->vcpu.kvm) && | |
3026 | kvm_run->request_interrupt_window && | |
3027 | !kvm_cpu_has_interrupt(&svm->vcpu)) { | |
3028 | ++svm->vcpu.stat.irq_window_exits; | |
3029 | kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN; | |
3030 | return 0; | |
3031 | } | |
3032 | ||
3033 | return 1; | |
3034 | } | |
3035 | ||
3036 | static int pause_interception(struct vcpu_svm *svm) | |
3037 | { | |
3038 | kvm_vcpu_on_spin(&(svm->vcpu)); | |
3039 | return 1; | |
3040 | } | |
3041 | ||
3042 | static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = { | |
3043 | [SVM_EXIT_READ_CR0] = cr_interception, | |
3044 | [SVM_EXIT_READ_CR3] = cr_interception, | |
3045 | [SVM_EXIT_READ_CR4] = cr_interception, | |
3046 | [SVM_EXIT_READ_CR8] = cr_interception, | |
3047 | [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, | |
3048 | [SVM_EXIT_WRITE_CR0] = cr0_write_interception, | |
3049 | [SVM_EXIT_WRITE_CR3] = cr_interception, | |
3050 | [SVM_EXIT_WRITE_CR4] = cr_interception, | |
3051 | [SVM_EXIT_WRITE_CR8] = cr8_write_interception, | |
3052 | [SVM_EXIT_READ_DR0] = dr_interception, | |
3053 | [SVM_EXIT_READ_DR1] = dr_interception, | |
3054 | [SVM_EXIT_READ_DR2] = dr_interception, | |
3055 | [SVM_EXIT_READ_DR3] = dr_interception, | |
3056 | [SVM_EXIT_READ_DR4] = dr_interception, | |
3057 | [SVM_EXIT_READ_DR5] = dr_interception, | |
3058 | [SVM_EXIT_READ_DR6] = dr_interception, | |
3059 | [SVM_EXIT_READ_DR7] = dr_interception, | |
3060 | [SVM_EXIT_WRITE_DR0] = dr_interception, | |
3061 | [SVM_EXIT_WRITE_DR1] = dr_interception, | |
3062 | [SVM_EXIT_WRITE_DR2] = dr_interception, | |
3063 | [SVM_EXIT_WRITE_DR3] = dr_interception, | |
3064 | [SVM_EXIT_WRITE_DR4] = dr_interception, | |
3065 | [SVM_EXIT_WRITE_DR5] = dr_interception, | |
3066 | [SVM_EXIT_WRITE_DR6] = dr_interception, | |
3067 | [SVM_EXIT_WRITE_DR7] = dr_interception, | |
3068 | [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception, | |
3069 | [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception, | |
3070 | [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception, | |
3071 | [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception, | |
3072 | [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception, | |
3073 | [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception, | |
3074 | [SVM_EXIT_INTR] = intr_interception, | |
3075 | [SVM_EXIT_NMI] = nmi_interception, | |
3076 | [SVM_EXIT_SMI] = nop_on_interception, | |
3077 | [SVM_EXIT_INIT] = nop_on_interception, | |
3078 | [SVM_EXIT_VINTR] = interrupt_window_interception, | |
3079 | [SVM_EXIT_CPUID] = cpuid_interception, | |
3080 | [SVM_EXIT_IRET] = iret_interception, | |
3081 | [SVM_EXIT_INVD] = emulate_on_interception, | |
3082 | [SVM_EXIT_PAUSE] = pause_interception, | |
3083 | [SVM_EXIT_HLT] = halt_interception, | |
3084 | [SVM_EXIT_INVLPG] = invlpg_interception, | |
3085 | [SVM_EXIT_INVLPGA] = invlpga_interception, | |
3086 | [SVM_EXIT_IOIO] = io_interception, | |
3087 | [SVM_EXIT_MSR] = msr_interception, | |
3088 | [SVM_EXIT_TASK_SWITCH] = task_switch_interception, | |
3089 | [SVM_EXIT_SHUTDOWN] = shutdown_interception, | |
3090 | [SVM_EXIT_VMRUN] = vmrun_interception, | |
3091 | [SVM_EXIT_VMMCALL] = vmmcall_interception, | |
3092 | [SVM_EXIT_VMLOAD] = vmload_interception, | |
3093 | [SVM_EXIT_VMSAVE] = vmsave_interception, | |
3094 | [SVM_EXIT_STGI] = stgi_interception, | |
3095 | [SVM_EXIT_CLGI] = clgi_interception, | |
3096 | [SVM_EXIT_SKINIT] = skinit_interception, | |
3097 | [SVM_EXIT_WBINVD] = emulate_on_interception, | |
3098 | [SVM_EXIT_MONITOR] = invalid_op_interception, | |
3099 | [SVM_EXIT_MWAIT] = invalid_op_interception, | |
3100 | [SVM_EXIT_XSETBV] = xsetbv_interception, | |
3101 | [SVM_EXIT_NPF] = pf_interception, | |
3102 | }; | |
3103 | ||
3104 | void dump_vmcb(struct kvm_vcpu *vcpu) | |
3105 | { | |
3106 | struct vcpu_svm *svm = to_svm(vcpu); | |
3107 | struct vmcb_control_area *control = &svm->vmcb->control; | |
3108 | struct vmcb_save_area *save = &svm->vmcb->save; | |
3109 | ||
3110 | pr_err("VMCB Control Area:\n"); | |
3111 | pr_err("cr_read: %04x\n", control->intercept_cr & 0xffff); | |
3112 | pr_err("cr_write: %04x\n", control->intercept_cr >> 16); | |
3113 | pr_err("dr_read: %04x\n", control->intercept_dr & 0xffff); | |
3114 | pr_err("dr_write: %04x\n", control->intercept_dr >> 16); | |
3115 | pr_err("exceptions: %08x\n", control->intercept_exceptions); | |
3116 | pr_err("intercepts: %016llx\n", control->intercept); | |
3117 | pr_err("pause filter count: %d\n", control->pause_filter_count); | |
3118 | pr_err("iopm_base_pa: %016llx\n", control->iopm_base_pa); | |
3119 | pr_err("msrpm_base_pa: %016llx\n", control->msrpm_base_pa); | |
3120 | pr_err("tsc_offset: %016llx\n", control->tsc_offset); | |
3121 | pr_err("asid: %d\n", control->asid); | |
3122 | pr_err("tlb_ctl: %d\n", control->tlb_ctl); | |
3123 | pr_err("int_ctl: %08x\n", control->int_ctl); | |
3124 | pr_err("int_vector: %08x\n", control->int_vector); | |
3125 | pr_err("int_state: %08x\n", control->int_state); | |
3126 | pr_err("exit_code: %08x\n", control->exit_code); | |
3127 | pr_err("exit_info1: %016llx\n", control->exit_info_1); | |
3128 | pr_err("exit_info2: %016llx\n", control->exit_info_2); | |
3129 | pr_err("exit_int_info: %08x\n", control->exit_int_info); | |
3130 | pr_err("exit_int_info_err: %08x\n", control->exit_int_info_err); | |
3131 | pr_err("nested_ctl: %lld\n", control->nested_ctl); | |
3132 | pr_err("nested_cr3: %016llx\n", control->nested_cr3); | |
3133 | pr_err("event_inj: %08x\n", control->event_inj); | |
3134 | pr_err("event_inj_err: %08x\n", control->event_inj_err); | |
3135 | pr_err("lbr_ctl: %lld\n", control->lbr_ctl); | |
3136 | pr_err("next_rip: %016llx\n", control->next_rip); | |
3137 | pr_err("VMCB State Save Area:\n"); | |
3138 | pr_err("es: s: %04x a: %04x l: %08x b: %016llx\n", | |
3139 | save->es.selector, save->es.attrib, | |
3140 | save->es.limit, save->es.base); | |
3141 | pr_err("cs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3142 | save->cs.selector, save->cs.attrib, | |
3143 | save->cs.limit, save->cs.base); | |
3144 | pr_err("ss: s: %04x a: %04x l: %08x b: %016llx\n", | |
3145 | save->ss.selector, save->ss.attrib, | |
3146 | save->ss.limit, save->ss.base); | |
3147 | pr_err("ds: s: %04x a: %04x l: %08x b: %016llx\n", | |
3148 | save->ds.selector, save->ds.attrib, | |
3149 | save->ds.limit, save->ds.base); | |
3150 | pr_err("fs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3151 | save->fs.selector, save->fs.attrib, | |
3152 | save->fs.limit, save->fs.base); | |
3153 | pr_err("gs: s: %04x a: %04x l: %08x b: %016llx\n", | |
3154 | save->gs.selector, save->gs.attrib, | |
3155 | save->gs.limit, save->gs.base); | |
3156 | pr_err("gdtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3157 | save->gdtr.selector, save->gdtr.attrib, | |
3158 | save->gdtr.limit, save->gdtr.base); | |
3159 | pr_err("ldtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3160 | save->ldtr.selector, save->ldtr.attrib, | |
3161 | save->ldtr.limit, save->ldtr.base); | |
3162 | pr_err("idtr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3163 | save->idtr.selector, save->idtr.attrib, | |
3164 | save->idtr.limit, save->idtr.base); | |
3165 | pr_err("tr: s: %04x a: %04x l: %08x b: %016llx\n", | |
3166 | save->tr.selector, save->tr.attrib, | |
3167 | save->tr.limit, save->tr.base); | |
3168 | pr_err("cpl: %d efer: %016llx\n", | |
3169 | save->cpl, save->efer); | |
3170 | pr_err("cr0: %016llx cr2: %016llx\n", | |
3171 | save->cr0, save->cr2); | |
3172 | pr_err("cr3: %016llx cr4: %016llx\n", | |
3173 | save->cr3, save->cr4); | |
3174 | pr_err("dr6: %016llx dr7: %016llx\n", | |
3175 | save->dr6, save->dr7); | |
3176 | pr_err("rip: %016llx rflags: %016llx\n", | |
3177 | save->rip, save->rflags); | |
3178 | pr_err("rsp: %016llx rax: %016llx\n", | |
3179 | save->rsp, save->rax); | |
3180 | pr_err("star: %016llx lstar: %016llx\n", | |
3181 | save->star, save->lstar); | |
3182 | pr_err("cstar: %016llx sfmask: %016llx\n", | |
3183 | save->cstar, save->sfmask); | |
3184 | pr_err("kernel_gs_base: %016llx sysenter_cs: %016llx\n", | |
3185 | save->kernel_gs_base, save->sysenter_cs); | |
3186 | pr_err("sysenter_esp: %016llx sysenter_eip: %016llx\n", | |
3187 | save->sysenter_esp, save->sysenter_eip); | |
3188 | pr_err("gpat: %016llx dbgctl: %016llx\n", | |
3189 | save->g_pat, save->dbgctl); | |
3190 | pr_err("br_from: %016llx br_to: %016llx\n", | |
3191 | save->br_from, save->br_to); | |
3192 | pr_err("excp_from: %016llx excp_to: %016llx\n", | |
3193 | save->last_excp_from, save->last_excp_to); | |
3194 | ||
3195 | } | |
3196 | ||
3197 | static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) | |
3198 | { | |
3199 | struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control; | |
3200 | ||
3201 | *info1 = control->exit_info_1; | |
3202 | *info2 = control->exit_info_2; | |
3203 | } | |
3204 | ||
3205 | static int handle_exit(struct kvm_vcpu *vcpu) | |
3206 | { | |
3207 | struct vcpu_svm *svm = to_svm(vcpu); | |
3208 | struct kvm_run *kvm_run = vcpu->run; | |
3209 | u32 exit_code = svm->vmcb->control.exit_code; | |
3210 | ||
3211 | trace_kvm_exit(exit_code, vcpu, KVM_ISA_SVM); | |
3212 | ||
3213 | if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE)) | |
3214 | vcpu->arch.cr0 = svm->vmcb->save.cr0; | |
3215 | if (npt_enabled) | |
3216 | vcpu->arch.cr3 = svm->vmcb->save.cr3; | |
3217 | ||
3218 | if (unlikely(svm->nested.exit_required)) { | |
3219 | nested_svm_vmexit(svm); | |
3220 | svm->nested.exit_required = false; | |
3221 | ||
3222 | return 1; | |
3223 | } | |
3224 | ||
3225 | if (is_guest_mode(vcpu)) { | |
3226 | int vmexit; | |
3227 | ||
3228 | trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code, | |
3229 | svm->vmcb->control.exit_info_1, | |
3230 | svm->vmcb->control.exit_info_2, | |
3231 | svm->vmcb->control.exit_int_info, | |
3232 | svm->vmcb->control.exit_int_info_err); | |
3233 | ||
3234 | vmexit = nested_svm_exit_special(svm); | |
3235 | ||
3236 | if (vmexit == NESTED_EXIT_CONTINUE) | |
3237 | vmexit = nested_svm_exit_handled(svm); | |
3238 | ||
3239 | if (vmexit == NESTED_EXIT_DONE) | |
3240 | return 1; | |
3241 | } | |
3242 | ||
3243 | svm_complete_interrupts(svm); | |
3244 | ||
3245 | if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) { | |
3246 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
3247 | kvm_run->fail_entry.hardware_entry_failure_reason | |
3248 | = svm->vmcb->control.exit_code; | |
3249 | pr_err("KVM: FAILED VMRUN WITH VMCB:\n"); | |
3250 | dump_vmcb(vcpu); | |
3251 | return 0; | |
3252 | } | |
3253 | ||
3254 | if (is_external_interrupt(svm->vmcb->control.exit_int_info) && | |
3255 | exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR && | |
3256 | exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH && | |
3257 | exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI) | |
3258 | printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x " | |
3259 | "exit_code 0x%x\n", | |
3260 | __func__, svm->vmcb->control.exit_int_info, | |
3261 | exit_code); | |
3262 | ||
3263 | if (exit_code >= ARRAY_SIZE(svm_exit_handlers) | |
3264 | || !svm_exit_handlers[exit_code]) { | |
3265 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
3266 | kvm_run->hw.hardware_exit_reason = exit_code; | |
3267 | return 0; | |
3268 | } | |
3269 | ||
3270 | return svm_exit_handlers[exit_code](svm); | |
3271 | } | |
3272 | ||
3273 | static void reload_tss(struct kvm_vcpu *vcpu) | |
3274 | { | |
3275 | int cpu = raw_smp_processor_id(); | |
3276 | ||
3277 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); | |
3278 | sd->tss_desc->type = 9; /* available 32/64-bit TSS */ | |
3279 | load_TR_desc(); | |
3280 | } | |
3281 | ||
3282 | static void pre_svm_run(struct vcpu_svm *svm) | |
3283 | { | |
3284 | int cpu = raw_smp_processor_id(); | |
3285 | ||
3286 | struct svm_cpu_data *sd = per_cpu(svm_data, cpu); | |
3287 | ||
3288 | /* FIXME: handle wraparound of asid_generation */ | |
3289 | if (svm->asid_generation != sd->asid_generation) | |
3290 | new_asid(svm, sd); | |
3291 | } | |
3292 | ||
3293 | static void svm_inject_nmi(struct kvm_vcpu *vcpu) | |
3294 | { | |
3295 | struct vcpu_svm *svm = to_svm(vcpu); | |
3296 | ||
3297 | svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI; | |
3298 | vcpu->arch.hflags |= HF_NMI_MASK; | |
3299 | set_intercept(svm, INTERCEPT_IRET); | |
3300 | ++vcpu->stat.nmi_injections; | |
3301 | } | |
3302 | ||
3303 | static inline void svm_inject_irq(struct vcpu_svm *svm, int irq) | |
3304 | { | |
3305 | struct vmcb_control_area *control; | |
3306 | ||
3307 | control = &svm->vmcb->control; | |
3308 | control->int_vector = irq; | |
3309 | control->int_ctl &= ~V_INTR_PRIO_MASK; | |
3310 | control->int_ctl |= V_IRQ_MASK | | |
3311 | ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT); | |
3312 | mark_dirty(svm->vmcb, VMCB_INTR); | |
3313 | } | |
3314 | ||
3315 | static void svm_set_irq(struct kvm_vcpu *vcpu) | |
3316 | { | |
3317 | struct vcpu_svm *svm = to_svm(vcpu); | |
3318 | ||
3319 | BUG_ON(!(gif_set(svm))); | |
3320 | ||
3321 | trace_kvm_inj_virq(vcpu->arch.interrupt.nr); | |
3322 | ++vcpu->stat.irq_injections; | |
3323 | ||
3324 | svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr | | |
3325 | SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR; | |
3326 | } | |
3327 | ||
3328 | static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr) | |
3329 | { | |
3330 | struct vcpu_svm *svm = to_svm(vcpu); | |
3331 | ||
3332 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) | |
3333 | return; | |
3334 | ||
3335 | if (irr == -1) | |
3336 | return; | |
3337 | ||
3338 | if (tpr >= irr) | |
3339 | set_cr_intercept(svm, INTERCEPT_CR8_WRITE); | |
3340 | } | |
3341 | ||
3342 | static int svm_nmi_allowed(struct kvm_vcpu *vcpu) | |
3343 | { | |
3344 | struct vcpu_svm *svm = to_svm(vcpu); | |
3345 | struct vmcb *vmcb = svm->vmcb; | |
3346 | int ret; | |
3347 | ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) && | |
3348 | !(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
3349 | ret = ret && gif_set(svm) && nested_svm_nmi(svm); | |
3350 | ||
3351 | return ret; | |
3352 | } | |
3353 | ||
3354 | static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu) | |
3355 | { | |
3356 | struct vcpu_svm *svm = to_svm(vcpu); | |
3357 | ||
3358 | return !!(svm->vcpu.arch.hflags & HF_NMI_MASK); | |
3359 | } | |
3360 | ||
3361 | static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked) | |
3362 | { | |
3363 | struct vcpu_svm *svm = to_svm(vcpu); | |
3364 | ||
3365 | if (masked) { | |
3366 | svm->vcpu.arch.hflags |= HF_NMI_MASK; | |
3367 | set_intercept(svm, INTERCEPT_IRET); | |
3368 | } else { | |
3369 | svm->vcpu.arch.hflags &= ~HF_NMI_MASK; | |
3370 | clr_intercept(svm, INTERCEPT_IRET); | |
3371 | } | |
3372 | } | |
3373 | ||
3374 | static int svm_interrupt_allowed(struct kvm_vcpu *vcpu) | |
3375 | { | |
3376 | struct vcpu_svm *svm = to_svm(vcpu); | |
3377 | struct vmcb *vmcb = svm->vmcb; | |
3378 | int ret; | |
3379 | ||
3380 | if (!gif_set(svm) || | |
3381 | (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)) | |
3382 | return 0; | |
3383 | ||
3384 | ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF); | |
3385 | ||
3386 | if (is_guest_mode(vcpu)) | |
3387 | return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK); | |
3388 | ||
3389 | return ret; | |
3390 | } | |
3391 | ||
3392 | static void enable_irq_window(struct kvm_vcpu *vcpu) | |
3393 | { | |
3394 | struct vcpu_svm *svm = to_svm(vcpu); | |
3395 | ||
3396 | /* | |
3397 | * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes | |
3398 | * 1, because that's a separate STGI/VMRUN intercept. The next time we | |
3399 | * get that intercept, this function will be called again though and | |
3400 | * we'll get the vintr intercept. | |
3401 | */ | |
3402 | if (gif_set(svm) && nested_svm_intr(svm)) { | |
3403 | svm_set_vintr(svm); | |
3404 | svm_inject_irq(svm, 0x0); | |
3405 | } | |
3406 | } | |
3407 | ||
3408 | static void enable_nmi_window(struct kvm_vcpu *vcpu) | |
3409 | { | |
3410 | struct vcpu_svm *svm = to_svm(vcpu); | |
3411 | ||
3412 | if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK)) | |
3413 | == HF_NMI_MASK) | |
3414 | return; /* IRET will cause a vm exit */ | |
3415 | ||
3416 | /* | |
3417 | * Something prevents NMI from been injected. Single step over possible | |
3418 | * problem (IRET or exception injection or interrupt shadow) | |
3419 | */ | |
3420 | svm->nmi_singlestep = true; | |
3421 | svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF); | |
3422 | update_db_intercept(vcpu); | |
3423 | } | |
3424 | ||
3425 | static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr) | |
3426 | { | |
3427 | return 0; | |
3428 | } | |
3429 | ||
3430 | static void svm_flush_tlb(struct kvm_vcpu *vcpu) | |
3431 | { | |
3432 | struct vcpu_svm *svm = to_svm(vcpu); | |
3433 | ||
3434 | if (static_cpu_has(X86_FEATURE_FLUSHBYASID)) | |
3435 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID; | |
3436 | else | |
3437 | svm->asid_generation--; | |
3438 | } | |
3439 | ||
3440 | static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu) | |
3441 | { | |
3442 | } | |
3443 | ||
3444 | static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu) | |
3445 | { | |
3446 | struct vcpu_svm *svm = to_svm(vcpu); | |
3447 | ||
3448 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) | |
3449 | return; | |
3450 | ||
3451 | if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) { | |
3452 | int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK; | |
3453 | kvm_set_cr8(vcpu, cr8); | |
3454 | } | |
3455 | } | |
3456 | ||
3457 | static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu) | |
3458 | { | |
3459 | struct vcpu_svm *svm = to_svm(vcpu); | |
3460 | u64 cr8; | |
3461 | ||
3462 | if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK)) | |
3463 | return; | |
3464 | ||
3465 | cr8 = kvm_get_cr8(vcpu); | |
3466 | svm->vmcb->control.int_ctl &= ~V_TPR_MASK; | |
3467 | svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK; | |
3468 | } | |
3469 | ||
3470 | static void svm_complete_interrupts(struct vcpu_svm *svm) | |
3471 | { | |
3472 | u8 vector; | |
3473 | int type; | |
3474 | u32 exitintinfo = svm->vmcb->control.exit_int_info; | |
3475 | unsigned int3_injected = svm->int3_injected; | |
3476 | ||
3477 | svm->int3_injected = 0; | |
3478 | ||
3479 | /* | |
3480 | * If we've made progress since setting HF_IRET_MASK, we've | |
3481 | * executed an IRET and can allow NMI injection. | |
3482 | */ | |
3483 | if ((svm->vcpu.arch.hflags & HF_IRET_MASK) | |
3484 | && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) { | |
3485 | svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK); | |
3486 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); | |
3487 | } | |
3488 | ||
3489 | svm->vcpu.arch.nmi_injected = false; | |
3490 | kvm_clear_exception_queue(&svm->vcpu); | |
3491 | kvm_clear_interrupt_queue(&svm->vcpu); | |
3492 | ||
3493 | if (!(exitintinfo & SVM_EXITINTINFO_VALID)) | |
3494 | return; | |
3495 | ||
3496 | kvm_make_request(KVM_REQ_EVENT, &svm->vcpu); | |
3497 | ||
3498 | vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK; | |
3499 | type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK; | |
3500 | ||
3501 | switch (type) { | |
3502 | case SVM_EXITINTINFO_TYPE_NMI: | |
3503 | svm->vcpu.arch.nmi_injected = true; | |
3504 | break; | |
3505 | case SVM_EXITINTINFO_TYPE_EXEPT: | |
3506 | /* | |
3507 | * In case of software exceptions, do not reinject the vector, | |
3508 | * but re-execute the instruction instead. Rewind RIP first | |
3509 | * if we emulated INT3 before. | |
3510 | */ | |
3511 | if (kvm_exception_is_soft(vector)) { | |
3512 | if (vector == BP_VECTOR && int3_injected && | |
3513 | kvm_is_linear_rip(&svm->vcpu, svm->int3_rip)) | |
3514 | kvm_rip_write(&svm->vcpu, | |
3515 | kvm_rip_read(&svm->vcpu) - | |
3516 | int3_injected); | |
3517 | break; | |
3518 | } | |
3519 | if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) { | |
3520 | u32 err = svm->vmcb->control.exit_int_info_err; | |
3521 | kvm_requeue_exception_e(&svm->vcpu, vector, err); | |
3522 | ||
3523 | } else | |
3524 | kvm_requeue_exception(&svm->vcpu, vector); | |
3525 | break; | |
3526 | case SVM_EXITINTINFO_TYPE_INTR: | |
3527 | kvm_queue_interrupt(&svm->vcpu, vector, false); | |
3528 | break; | |
3529 | default: | |
3530 | break; | |
3531 | } | |
3532 | } | |
3533 | ||
3534 | static void svm_cancel_injection(struct kvm_vcpu *vcpu) | |
3535 | { | |
3536 | struct vcpu_svm *svm = to_svm(vcpu); | |
3537 | struct vmcb_control_area *control = &svm->vmcb->control; | |
3538 | ||
3539 | control->exit_int_info = control->event_inj; | |
3540 | control->exit_int_info_err = control->event_inj_err; | |
3541 | control->event_inj = 0; | |
3542 | svm_complete_interrupts(svm); | |
3543 | } | |
3544 | ||
3545 | #ifdef CONFIG_X86_64 | |
3546 | #define R "r" | |
3547 | #else | |
3548 | #define R "e" | |
3549 | #endif | |
3550 | ||
3551 | static void svm_vcpu_run(struct kvm_vcpu *vcpu) | |
3552 | { | |
3553 | struct vcpu_svm *svm = to_svm(vcpu); | |
3554 | ||
3555 | svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX]; | |
3556 | svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP]; | |
3557 | svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP]; | |
3558 | ||
3559 | /* | |
3560 | * A vmexit emulation is required before the vcpu can be executed | |
3561 | * again. | |
3562 | */ | |
3563 | if (unlikely(svm->nested.exit_required)) | |
3564 | return; | |
3565 | ||
3566 | pre_svm_run(svm); | |
3567 | ||
3568 | sync_lapic_to_cr8(vcpu); | |
3569 | ||
3570 | svm->vmcb->save.cr2 = vcpu->arch.cr2; | |
3571 | ||
3572 | clgi(); | |
3573 | ||
3574 | local_irq_enable(); | |
3575 | ||
3576 | asm volatile ( | |
3577 | "push %%"R"bp; \n\t" | |
3578 | "mov %c[rbx](%[svm]), %%"R"bx \n\t" | |
3579 | "mov %c[rcx](%[svm]), %%"R"cx \n\t" | |
3580 | "mov %c[rdx](%[svm]), %%"R"dx \n\t" | |
3581 | "mov %c[rsi](%[svm]), %%"R"si \n\t" | |
3582 | "mov %c[rdi](%[svm]), %%"R"di \n\t" | |
3583 | "mov %c[rbp](%[svm]), %%"R"bp \n\t" | |
3584 | #ifdef CONFIG_X86_64 | |
3585 | "mov %c[r8](%[svm]), %%r8 \n\t" | |
3586 | "mov %c[r9](%[svm]), %%r9 \n\t" | |
3587 | "mov %c[r10](%[svm]), %%r10 \n\t" | |
3588 | "mov %c[r11](%[svm]), %%r11 \n\t" | |
3589 | "mov %c[r12](%[svm]), %%r12 \n\t" | |
3590 | "mov %c[r13](%[svm]), %%r13 \n\t" | |
3591 | "mov %c[r14](%[svm]), %%r14 \n\t" | |
3592 | "mov %c[r15](%[svm]), %%r15 \n\t" | |
3593 | #endif | |
3594 | ||
3595 | /* Enter guest mode */ | |
3596 | "push %%"R"ax \n\t" | |
3597 | "mov %c[vmcb](%[svm]), %%"R"ax \n\t" | |
3598 | __ex(SVM_VMLOAD) "\n\t" | |
3599 | __ex(SVM_VMRUN) "\n\t" | |
3600 | __ex(SVM_VMSAVE) "\n\t" | |
3601 | "pop %%"R"ax \n\t" | |
3602 | ||
3603 | /* Save guest registers, load host registers */ | |
3604 | "mov %%"R"bx, %c[rbx](%[svm]) \n\t" | |
3605 | "mov %%"R"cx, %c[rcx](%[svm]) \n\t" | |
3606 | "mov %%"R"dx, %c[rdx](%[svm]) \n\t" | |
3607 | "mov %%"R"si, %c[rsi](%[svm]) \n\t" | |
3608 | "mov %%"R"di, %c[rdi](%[svm]) \n\t" | |
3609 | "mov %%"R"bp, %c[rbp](%[svm]) \n\t" | |
3610 | #ifdef CONFIG_X86_64 | |
3611 | "mov %%r8, %c[r8](%[svm]) \n\t" | |
3612 | "mov %%r9, %c[r9](%[svm]) \n\t" | |
3613 | "mov %%r10, %c[r10](%[svm]) \n\t" | |
3614 | "mov %%r11, %c[r11](%[svm]) \n\t" | |
3615 | "mov %%r12, %c[r12](%[svm]) \n\t" | |
3616 | "mov %%r13, %c[r13](%[svm]) \n\t" | |
3617 | "mov %%r14, %c[r14](%[svm]) \n\t" | |
3618 | "mov %%r15, %c[r15](%[svm]) \n\t" | |
3619 | #endif | |
3620 | "pop %%"R"bp" | |
3621 | : | |
3622 | : [svm]"a"(svm), | |
3623 | [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)), | |
3624 | [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])), | |
3625 | [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])), | |
3626 | [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])), | |
3627 | [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])), | |
3628 | [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])), | |
3629 | [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP])) | |
3630 | #ifdef CONFIG_X86_64 | |
3631 | , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])), | |
3632 | [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])), | |
3633 | [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])), | |
3634 | [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])), | |
3635 | [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])), | |
3636 | [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])), | |
3637 | [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])), | |
3638 | [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15])) | |
3639 | #endif | |
3640 | : "cc", "memory" | |
3641 | , R"bx", R"cx", R"dx", R"si", R"di" | |
3642 | #ifdef CONFIG_X86_64 | |
3643 | , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15" | |
3644 | #endif | |
3645 | ); | |
3646 | ||
3647 | #ifdef CONFIG_X86_64 | |
3648 | wrmsrl(MSR_GS_BASE, svm->host.gs_base); | |
3649 | #else | |
3650 | loadsegment(fs, svm->host.fs); | |
3651 | #ifndef CONFIG_X86_32_LAZY_GS | |
3652 | loadsegment(gs, svm->host.gs); | |
3653 | #endif | |
3654 | #endif | |
3655 | ||
3656 | reload_tss(vcpu); | |
3657 | ||
3658 | local_irq_disable(); | |
3659 | ||
3660 | vcpu->arch.cr2 = svm->vmcb->save.cr2; | |
3661 | vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax; | |
3662 | vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp; | |
3663 | vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip; | |
3664 | ||
3665 | if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI)) | |
3666 | kvm_before_handle_nmi(&svm->vcpu); | |
3667 | ||
3668 | stgi(); | |
3669 | ||
3670 | /* Any pending NMI will happen here */ | |
3671 | ||
3672 | if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI)) | |
3673 | kvm_after_handle_nmi(&svm->vcpu); | |
3674 | ||
3675 | sync_cr8_to_lapic(vcpu); | |
3676 | ||
3677 | svm->next_rip = 0; | |
3678 | ||
3679 | svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING; | |
3680 | ||
3681 | /* if exit due to PF check for async PF */ | |
3682 | if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) | |
3683 | svm->apf_reason = kvm_read_and_reset_pf_reason(); | |
3684 | ||
3685 | if (npt_enabled) { | |
3686 | vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR); | |
3687 | vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR); | |
3688 | } | |
3689 | ||
3690 | /* | |
3691 | * We need to handle MC intercepts here before the vcpu has a chance to | |
3692 | * change the physical cpu | |
3693 | */ | |
3694 | if (unlikely(svm->vmcb->control.exit_code == | |
3695 | SVM_EXIT_EXCP_BASE + MC_VECTOR)) | |
3696 | svm_handle_mce(svm); | |
3697 | ||
3698 | mark_all_clean(svm->vmcb); | |
3699 | } | |
3700 | ||
3701 | #undef R | |
3702 | ||
3703 | static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root) | |
3704 | { | |
3705 | struct vcpu_svm *svm = to_svm(vcpu); | |
3706 | ||
3707 | svm->vmcb->save.cr3 = root; | |
3708 | mark_dirty(svm->vmcb, VMCB_CR); | |
3709 | svm_flush_tlb(vcpu); | |
3710 | } | |
3711 | ||
3712 | static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root) | |
3713 | { | |
3714 | struct vcpu_svm *svm = to_svm(vcpu); | |
3715 | ||
3716 | svm->vmcb->control.nested_cr3 = root; | |
3717 | mark_dirty(svm->vmcb, VMCB_NPT); | |
3718 | ||
3719 | /* Also sync guest cr3 here in case we live migrate */ | |
3720 | svm->vmcb->save.cr3 = kvm_read_cr3(vcpu); | |
3721 | mark_dirty(svm->vmcb, VMCB_CR); | |
3722 | ||
3723 | svm_flush_tlb(vcpu); | |
3724 | } | |
3725 | ||
3726 | static int is_disabled(void) | |
3727 | { | |
3728 | u64 vm_cr; | |
3729 | ||
3730 | rdmsrl(MSR_VM_CR, vm_cr); | |
3731 | if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE)) | |
3732 | return 1; | |
3733 | ||
3734 | return 0; | |
3735 | } | |
3736 | ||
3737 | static void | |
3738 | svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) | |
3739 | { | |
3740 | /* | |
3741 | * Patch in the VMMCALL instruction: | |
3742 | */ | |
3743 | hypercall[0] = 0x0f; | |
3744 | hypercall[1] = 0x01; | |
3745 | hypercall[2] = 0xd9; | |
3746 | } | |
3747 | ||
3748 | static void svm_check_processor_compat(void *rtn) | |
3749 | { | |
3750 | *(int *)rtn = 0; | |
3751 | } | |
3752 | ||
3753 | static bool svm_cpu_has_accelerated_tpr(void) | |
3754 | { | |
3755 | return false; | |
3756 | } | |
3757 | ||
3758 | static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) | |
3759 | { | |
3760 | return 0; | |
3761 | } | |
3762 | ||
3763 | static void svm_cpuid_update(struct kvm_vcpu *vcpu) | |
3764 | { | |
3765 | } | |
3766 | ||
3767 | static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) | |
3768 | { | |
3769 | switch (func) { | |
3770 | case 0x80000001: | |
3771 | if (nested) | |
3772 | entry->ecx |= (1 << 2); /* Set SVM bit */ | |
3773 | break; | |
3774 | case 0x8000000A: | |
3775 | entry->eax = 1; /* SVM revision 1 */ | |
3776 | entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper | |
3777 | ASID emulation to nested SVM */ | |
3778 | entry->ecx = 0; /* Reserved */ | |
3779 | entry->edx = 0; /* Per default do not support any | |
3780 | additional features */ | |
3781 | ||
3782 | /* Support next_rip if host supports it */ | |
3783 | if (boot_cpu_has(X86_FEATURE_NRIPS)) | |
3784 | entry->edx |= SVM_FEATURE_NRIP; | |
3785 | ||
3786 | /* Support NPT for the guest if enabled */ | |
3787 | if (npt_enabled) | |
3788 | entry->edx |= SVM_FEATURE_NPT; | |
3789 | ||
3790 | break; | |
3791 | } | |
3792 | } | |
3793 | ||
3794 | static const struct trace_print_flags svm_exit_reasons_str[] = { | |
3795 | { SVM_EXIT_READ_CR0, "read_cr0" }, | |
3796 | { SVM_EXIT_READ_CR3, "read_cr3" }, | |
3797 | { SVM_EXIT_READ_CR4, "read_cr4" }, | |
3798 | { SVM_EXIT_READ_CR8, "read_cr8" }, | |
3799 | { SVM_EXIT_WRITE_CR0, "write_cr0" }, | |
3800 | { SVM_EXIT_WRITE_CR3, "write_cr3" }, | |
3801 | { SVM_EXIT_WRITE_CR4, "write_cr4" }, | |
3802 | { SVM_EXIT_WRITE_CR8, "write_cr8" }, | |
3803 | { SVM_EXIT_READ_DR0, "read_dr0" }, | |
3804 | { SVM_EXIT_READ_DR1, "read_dr1" }, | |
3805 | { SVM_EXIT_READ_DR2, "read_dr2" }, | |
3806 | { SVM_EXIT_READ_DR3, "read_dr3" }, | |
3807 | { SVM_EXIT_WRITE_DR0, "write_dr0" }, | |
3808 | { SVM_EXIT_WRITE_DR1, "write_dr1" }, | |
3809 | { SVM_EXIT_WRITE_DR2, "write_dr2" }, | |
3810 | { SVM_EXIT_WRITE_DR3, "write_dr3" }, | |
3811 | { SVM_EXIT_WRITE_DR5, "write_dr5" }, | |
3812 | { SVM_EXIT_WRITE_DR7, "write_dr7" }, | |
3813 | { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, | |
3814 | { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, | |
3815 | { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, | |
3816 | { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, | |
3817 | { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, | |
3818 | { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, | |
3819 | { SVM_EXIT_INTR, "interrupt" }, | |
3820 | { SVM_EXIT_NMI, "nmi" }, | |
3821 | { SVM_EXIT_SMI, "smi" }, | |
3822 | { SVM_EXIT_INIT, "init" }, | |
3823 | { SVM_EXIT_VINTR, "vintr" }, | |
3824 | { SVM_EXIT_CPUID, "cpuid" }, | |
3825 | { SVM_EXIT_INVD, "invd" }, | |
3826 | { SVM_EXIT_HLT, "hlt" }, | |
3827 | { SVM_EXIT_INVLPG, "invlpg" }, | |
3828 | { SVM_EXIT_INVLPGA, "invlpga" }, | |
3829 | { SVM_EXIT_IOIO, "io" }, | |
3830 | { SVM_EXIT_MSR, "msr" }, | |
3831 | { SVM_EXIT_TASK_SWITCH, "task_switch" }, | |
3832 | { SVM_EXIT_SHUTDOWN, "shutdown" }, | |
3833 | { SVM_EXIT_VMRUN, "vmrun" }, | |
3834 | { SVM_EXIT_VMMCALL, "hypercall" }, | |
3835 | { SVM_EXIT_VMLOAD, "vmload" }, | |
3836 | { SVM_EXIT_VMSAVE, "vmsave" }, | |
3837 | { SVM_EXIT_STGI, "stgi" }, | |
3838 | { SVM_EXIT_CLGI, "clgi" }, | |
3839 | { SVM_EXIT_SKINIT, "skinit" }, | |
3840 | { SVM_EXIT_WBINVD, "wbinvd" }, | |
3841 | { SVM_EXIT_MONITOR, "monitor" }, | |
3842 | { SVM_EXIT_MWAIT, "mwait" }, | |
3843 | { SVM_EXIT_XSETBV, "xsetbv" }, | |
3844 | { SVM_EXIT_NPF, "npf" }, | |
3845 | { -1, NULL } | |
3846 | }; | |
3847 | ||
3848 | static int svm_get_lpage_level(void) | |
3849 | { | |
3850 | return PT_PDPE_LEVEL; | |
3851 | } | |
3852 | ||
3853 | static bool svm_rdtscp_supported(void) | |
3854 | { | |
3855 | return false; | |
3856 | } | |
3857 | ||
3858 | static bool svm_has_wbinvd_exit(void) | |
3859 | { | |
3860 | return true; | |
3861 | } | |
3862 | ||
3863 | static void svm_fpu_deactivate(struct kvm_vcpu *vcpu) | |
3864 | { | |
3865 | struct vcpu_svm *svm = to_svm(vcpu); | |
3866 | ||
3867 | set_exception_intercept(svm, NM_VECTOR); | |
3868 | update_cr0_intercept(svm); | |
3869 | } | |
3870 | ||
3871 | #define POST_EX(exit) { .exit_code = (exit), \ | |
3872 | .stage = X86_ICPT_POST_EXCEPT, \ | |
3873 | .valid = true } | |
3874 | ||
3875 | static struct __x86_intercept { | |
3876 | u32 exit_code; | |
3877 | enum x86_intercept_stage stage; | |
3878 | bool valid; | |
3879 | } x86_intercept_map[] = { | |
3880 | [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0), | |
3881 | [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0), | |
3882 | [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0), | |
3883 | [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0), | |
3884 | [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0), | |
3885 | [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0), | |
3886 | [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0), | |
3887 | }; | |
3888 | ||
3889 | #undef POST_EX | |
3890 | ||
3891 | static int svm_check_intercept(struct kvm_vcpu *vcpu, | |
3892 | struct x86_instruction_info *info, | |
3893 | enum x86_intercept_stage stage) | |
3894 | { | |
3895 | struct vcpu_svm *svm = to_svm(vcpu); | |
3896 | int vmexit, ret = X86EMUL_CONTINUE; | |
3897 | struct __x86_intercept icpt_info; | |
3898 | struct vmcb *vmcb = svm->vmcb; | |
3899 | ||
3900 | if (info->intercept >= ARRAY_SIZE(x86_intercept_map)) | |
3901 | goto out; | |
3902 | ||
3903 | icpt_info = x86_intercept_map[info->intercept]; | |
3904 | ||
3905 | if (!icpt_info.valid || stage != icpt_info.stage) | |
3906 | goto out; | |
3907 | ||
3908 | switch (icpt_info.exit_code) { | |
3909 | case SVM_EXIT_READ_CR0: | |
3910 | if (info->intercept == x86_intercept_cr_read) | |
3911 | icpt_info.exit_code += info->modrm_reg; | |
3912 | break; | |
3913 | case SVM_EXIT_WRITE_CR0: { | |
3914 | unsigned long cr0, val; | |
3915 | u64 intercept; | |
3916 | ||
3917 | if (info->intercept == x86_intercept_cr_write) | |
3918 | icpt_info.exit_code += info->modrm_reg; | |
3919 | ||
3920 | if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0) | |
3921 | break; | |
3922 | ||
3923 | intercept = svm->nested.intercept; | |
3924 | ||
3925 | if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))) | |
3926 | break; | |
3927 | ||
3928 | cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK; | |
3929 | val = info->src_val & ~SVM_CR0_SELECTIVE_MASK; | |
3930 | ||
3931 | if (info->intercept == x86_intercept_lmsw) { | |
3932 | cr0 &= 0xfUL; | |
3933 | val &= 0xfUL; | |
3934 | /* lmsw can't clear PE - catch this here */ | |
3935 | if (cr0 & X86_CR0_PE) | |
3936 | val |= X86_CR0_PE; | |
3937 | } | |
3938 | ||
3939 | if (cr0 ^ val) | |
3940 | icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE; | |
3941 | ||
3942 | break; | |
3943 | } | |
3944 | case SVM_EXIT_READ_DR0: | |
3945 | case SVM_EXIT_WRITE_DR0: | |
3946 | icpt_info.exit_code += info->modrm_reg; | |
3947 | break; | |
3948 | default: | |
3949 | break; | |
3950 | } | |
3951 | ||
3952 | vmcb->control.next_rip = info->next_rip; | |
3953 | vmcb->control.exit_code = icpt_info.exit_code; | |
3954 | vmexit = nested_svm_exit_handled(svm); | |
3955 | ||
3956 | ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED | |
3957 | : X86EMUL_CONTINUE; | |
3958 | ||
3959 | out: | |
3960 | return ret; | |
3961 | } | |
3962 | ||
3963 | static struct kvm_x86_ops svm_x86_ops = { | |
3964 | .cpu_has_kvm_support = has_svm, | |
3965 | .disabled_by_bios = is_disabled, | |
3966 | .hardware_setup = svm_hardware_setup, | |
3967 | .hardware_unsetup = svm_hardware_unsetup, | |
3968 | .check_processor_compatibility = svm_check_processor_compat, | |
3969 | .hardware_enable = svm_hardware_enable, | |
3970 | .hardware_disable = svm_hardware_disable, | |
3971 | .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr, | |
3972 | ||
3973 | .vcpu_create = svm_create_vcpu, | |
3974 | .vcpu_free = svm_free_vcpu, | |
3975 | .vcpu_reset = svm_vcpu_reset, | |
3976 | ||
3977 | .prepare_guest_switch = svm_prepare_guest_switch, | |
3978 | .vcpu_load = svm_vcpu_load, | |
3979 | .vcpu_put = svm_vcpu_put, | |
3980 | ||
3981 | .set_guest_debug = svm_guest_debug, | |
3982 | .get_msr = svm_get_msr, | |
3983 | .set_msr = svm_set_msr, | |
3984 | .get_segment_base = svm_get_segment_base, | |
3985 | .get_segment = svm_get_segment, | |
3986 | .set_segment = svm_set_segment, | |
3987 | .get_cpl = svm_get_cpl, | |
3988 | .get_cs_db_l_bits = kvm_get_cs_db_l_bits, | |
3989 | .decache_cr0_guest_bits = svm_decache_cr0_guest_bits, | |
3990 | .decache_cr3 = svm_decache_cr3, | |
3991 | .decache_cr4_guest_bits = svm_decache_cr4_guest_bits, | |
3992 | .set_cr0 = svm_set_cr0, | |
3993 | .set_cr3 = svm_set_cr3, | |
3994 | .set_cr4 = svm_set_cr4, | |
3995 | .set_efer = svm_set_efer, | |
3996 | .get_idt = svm_get_idt, | |
3997 | .set_idt = svm_set_idt, | |
3998 | .get_gdt = svm_get_gdt, | |
3999 | .set_gdt = svm_set_gdt, | |
4000 | .set_dr7 = svm_set_dr7, | |
4001 | .cache_reg = svm_cache_reg, | |
4002 | .get_rflags = svm_get_rflags, | |
4003 | .set_rflags = svm_set_rflags, | |
4004 | .fpu_activate = svm_fpu_activate, | |
4005 | .fpu_deactivate = svm_fpu_deactivate, | |
4006 | ||
4007 | .tlb_flush = svm_flush_tlb, | |
4008 | ||
4009 | .run = svm_vcpu_run, | |
4010 | .handle_exit = handle_exit, | |
4011 | .skip_emulated_instruction = skip_emulated_instruction, | |
4012 | .set_interrupt_shadow = svm_set_interrupt_shadow, | |
4013 | .get_interrupt_shadow = svm_get_interrupt_shadow, | |
4014 | .patch_hypercall = svm_patch_hypercall, | |
4015 | .set_irq = svm_set_irq, | |
4016 | .set_nmi = svm_inject_nmi, | |
4017 | .queue_exception = svm_queue_exception, | |
4018 | .cancel_injection = svm_cancel_injection, | |
4019 | .interrupt_allowed = svm_interrupt_allowed, | |
4020 | .nmi_allowed = svm_nmi_allowed, | |
4021 | .get_nmi_mask = svm_get_nmi_mask, | |
4022 | .set_nmi_mask = svm_set_nmi_mask, | |
4023 | .enable_nmi_window = enable_nmi_window, | |
4024 | .enable_irq_window = enable_irq_window, | |
4025 | .update_cr8_intercept = update_cr8_intercept, | |
4026 | ||
4027 | .set_tss_addr = svm_set_tss_addr, | |
4028 | .get_tdp_level = get_npt_level, | |
4029 | .get_mt_mask = svm_get_mt_mask, | |
4030 | ||
4031 | .get_exit_info = svm_get_exit_info, | |
4032 | .exit_reasons_str = svm_exit_reasons_str, | |
4033 | ||
4034 | .get_lpage_level = svm_get_lpage_level, | |
4035 | ||
4036 | .cpuid_update = svm_cpuid_update, | |
4037 | ||
4038 | .rdtscp_supported = svm_rdtscp_supported, | |
4039 | ||
4040 | .set_supported_cpuid = svm_set_supported_cpuid, | |
4041 | ||
4042 | .has_wbinvd_exit = svm_has_wbinvd_exit, | |
4043 | ||
4044 | .write_tsc_offset = svm_write_tsc_offset, | |
4045 | .adjust_tsc_offset = svm_adjust_tsc_offset, | |
4046 | ||
4047 | .set_tdp_cr3 = set_tdp_cr3, | |
4048 | ||
4049 | .check_intercept = svm_check_intercept, | |
4050 | }; | |
4051 | ||
4052 | static int __init svm_init(void) | |
4053 | { | |
4054 | return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm), | |
4055 | __alignof__(struct vcpu_svm), THIS_MODULE); | |
4056 | } | |
4057 | ||
4058 | static void __exit svm_exit(void) | |
4059 | { | |
4060 | kvm_exit(); | |
4061 | } | |
4062 | ||
4063 | module_init(svm_init) | |
4064 | module_exit(svm_exit) |