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Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * AMD SVM support
5 *
6 * Copyright (C) 2006 Qumranet, Inc.
Nicolas Kaiser9611c182010-10-06 14:23:22 +02007 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Avi Kivity6aa8b732006-12-10 02:21:36 -08008 *
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 */
Avi Kivityedf88412007-12-16 11:02:48 +020017#include <linux/kvm_host.h>
18
Eddie Dong85f455f2007-07-06 12:20:49 +030019#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080020#include "mmu.h"
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030021#include "kvm_cache_regs.h"
Gleb Natapovfe4c7b12009-03-23 11:23:18 +020022#include "x86.h"
Avi Kivitye4956062007-06-28 14:15:57 -040023
Avi Kivity6aa8b732006-12-10 02:21:36 -080024#include <linux/module.h>
Josh Triplettae759542012-03-28 11:32:28 -070025#include <linux/mod_devicetable.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020026#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080027#include <linux/vmalloc.h>
28#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040029#include <linux/sched.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030030#include <linux/ftrace_event.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090031#include <linux/slab.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080032
Joerg Roedel1018faa2012-02-29 14:57:32 +010033#include <asm/perf_event.h>
Joerg Roedel67ec6602010-05-17 14:43:35 +020034#include <asm/tlbflush.h>
Avi Kivitye4956062007-06-28 14:15:57 -040035#include <asm/desc.h>
Gleb Natapov631bc482010-10-14 11:22:52 +020036#include <asm/kvm_para.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080037
Eduardo Habkost63d11422008-11-17 19:03:20 -020038#include <asm/virtext.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030039#include "trace.h"
Eduardo Habkost63d11422008-11-17 19:03:20 -020040
Avi Kivity4ecac3f2008-05-13 13:23:38 +030041#define __ex(x) __kvm_handle_fault_on_reboot(x)
42
Avi Kivity6aa8b732006-12-10 02:21:36 -080043MODULE_AUTHOR("Qumranet");
44MODULE_LICENSE("GPL");
45
Josh Triplettae759542012-03-28 11:32:28 -070046static const struct x86_cpu_id svm_cpu_id[] = {
47 X86_FEATURE_MATCH(X86_FEATURE_SVM),
48 {}
49};
50MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);
51
Avi Kivity6aa8b732006-12-10 02:21:36 -080052#define IOPM_ALLOC_ORDER 2
53#define MSRPM_ALLOC_ORDER 1
54
Avi Kivity6aa8b732006-12-10 02:21:36 -080055#define SEG_TYPE_LDT 2
56#define SEG_TYPE_BUSY_TSS16 3
57
Andre Przywara6bc31bd2010-04-11 23:07:28 +020058#define SVM_FEATURE_NPT (1 << 0)
59#define SVM_FEATURE_LBRV (1 << 1)
60#define SVM_FEATURE_SVML (1 << 2)
61#define SVM_FEATURE_NRIP (1 << 3)
Andre Przywaraddce97a2010-12-21 11:12:03 +010062#define SVM_FEATURE_TSC_RATE (1 << 4)
63#define SVM_FEATURE_VMCB_CLEAN (1 << 5)
64#define SVM_FEATURE_FLUSH_ASID (1 << 6)
65#define SVM_FEATURE_DECODE_ASSIST (1 << 7)
Andre Przywara6bc31bd2010-04-11 23:07:28 +020066#define SVM_FEATURE_PAUSE_FILTER (1 << 10)
Joerg Roedel80b77062007-03-30 17:02:14 +030067
Joerg Roedel410e4d52009-08-07 11:49:44 +020068#define NESTED_EXIT_HOST 0 /* Exit handled on host level */
69#define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
70#define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
71
Joerg Roedel24e09cb2008-02-13 18:58:47 +010072#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
73
Joerg Roedelfbc0db72011-03-25 09:44:46 +010074#define TSC_RATIO_RSVD 0xffffff0000000000ULL
Joerg Roedel92a1f122011-03-25 09:44:51 +010075#define TSC_RATIO_MIN 0x0000000000000001ULL
76#define TSC_RATIO_MAX 0x000000ffffffffffULL
Joerg Roedelfbc0db72011-03-25 09:44:46 +010077
Joerg Roedel67ec6602010-05-17 14:43:35 +020078static bool erratum_383_found __read_mostly;
79
Avi Kivity6c8166a2009-05-31 18:15:37 +030080static const u32 host_save_user_msrs[] = {
81#ifdef CONFIG_X86_64
82 MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
83 MSR_FS_BASE,
84#endif
85 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
86};
87
88#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
89
90struct kvm_vcpu;
91
Joerg Roedele6aa9ab2009-08-07 11:49:33 +020092struct nested_state {
93 struct vmcb *hsave;
94 u64 hsave_msr;
Joerg Roedel4a810182010-02-24 18:59:15 +010095 u64 vm_cr_msr;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +020096 u64 vmcb;
97
98 /* These are the merged vectors */
99 u32 *msrpm;
100
101 /* gpa pointers to the real vectors */
102 u64 vmcb_msrpm;
Joerg Roedelce2ac082010-03-01 15:34:39 +0100103 u64 vmcb_iopm;
Joerg Roedelaad42c62009-08-07 11:49:34 +0200104
Joerg Roedelcd3ff652009-10-09 16:08:26 +0200105 /* A VMEXIT is required but not yet emulated */
106 bool exit_required;
107
Joerg Roedelaad42c62009-08-07 11:49:34 +0200108 /* cache for intercepts of the guest */
Roedel, Joerg4ee546b2010-12-03 10:50:51 +0100109 u32 intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +0100110 u32 intercept_dr;
Joerg Roedelaad42c62009-08-07 11:49:34 +0200111 u32 intercept_exceptions;
112 u64 intercept;
113
Joerg Roedel5bd2edc2010-09-10 17:31:02 +0200114 /* Nested Paging related state */
115 u64 nested_cr3;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200116};
117
Joerg Roedel323c3d82010-03-01 15:34:37 +0100118#define MSRPM_OFFSETS 16
119static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
120
Boris Ostrovsky2b036c62012-01-09 14:00:35 -0500121/*
122 * Set osvw_len to higher value when updated Revision Guides
123 * are published and we know what the new status bits are
124 */
125static uint64_t osvw_len = 4, osvw_status;
126
Avi Kivity6c8166a2009-05-31 18:15:37 +0300127struct vcpu_svm {
128 struct kvm_vcpu vcpu;
129 struct vmcb *vmcb;
130 unsigned long vmcb_pa;
131 struct svm_cpu_data *svm_data;
132 uint64_t asid_generation;
133 uint64_t sysenter_esp;
134 uint64_t sysenter_eip;
135
136 u64 next_rip;
137
138 u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
Avi Kivityafe9e662010-10-21 12:20:32 +0200139 struct {
Avi Kivitydacccfd2010-10-21 12:20:33 +0200140 u16 fs;
141 u16 gs;
142 u16 ldt;
Avi Kivityafe9e662010-10-21 12:20:32 +0200143 u64 gs_base;
144 } host;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300145
146 u32 *msrpm;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300147
Avi Kivitybd3d1ec2011-02-03 15:29:52 +0200148 ulong nmi_iret_rip;
149
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200150 struct nested_state nested;
Jan Kiszka6be7d302009-10-18 13:24:54 +0200151
152 bool nmi_singlestep;
Jan Kiszka66b71382010-02-23 17:47:56 +0100153
154 unsigned int3_injected;
155 unsigned long int3_rip;
Gleb Natapov631bc482010-10-14 11:22:52 +0200156 u32 apf_reason;
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100157
158 u64 tsc_ratio;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300159};
160
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100161static DEFINE_PER_CPU(u64, current_tsc_ratio);
162#define TSC_RATIO_DEFAULT 0x0100000000ULL
163
Joerg Roedel455716f2010-03-01 15:34:35 +0100164#define MSR_INVALID 0xffffffffU
165
Mathias Krause09941fb2012-08-30 01:30:20 +0200166static const struct svm_direct_access_msrs {
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100167 u32 index; /* Index of the MSR */
168 bool always; /* True if intercept is always on */
169} direct_access_msrs[] = {
Brian Gerst8c065852010-07-17 09:03:26 -0400170 { .index = MSR_STAR, .always = true },
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100171 { .index = MSR_IA32_SYSENTER_CS, .always = true },
172#ifdef CONFIG_X86_64
173 { .index = MSR_GS_BASE, .always = true },
174 { .index = MSR_FS_BASE, .always = true },
175 { .index = MSR_KERNEL_GS_BASE, .always = true },
176 { .index = MSR_LSTAR, .always = true },
177 { .index = MSR_CSTAR, .always = true },
178 { .index = MSR_SYSCALL_MASK, .always = true },
179#endif
180 { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false },
181 { .index = MSR_IA32_LASTBRANCHTOIP, .always = false },
182 { .index = MSR_IA32_LASTINTFROMIP, .always = false },
183 { .index = MSR_IA32_LASTINTTOIP, .always = false },
184 { .index = MSR_INVALID, .always = false },
Avi Kivity6aa8b732006-12-10 02:21:36 -0800185};
186
187/* enable NPT for AMD64 and X86 with PAE */
188#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
189static bool npt_enabled = true;
190#else
Joerg Roedele0231712010-02-24 18:59:10 +0100191static bool npt_enabled;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800192#endif
193
Davidlohr Buesoe2358852012-01-17 14:09:50 +0100194/* allow nested paging (virtualized MMU) for all guests */
195static int npt = true;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800196module_param(npt, int, S_IRUGO);
197
Davidlohr Buesoe2358852012-01-17 14:09:50 +0100198/* allow nested virtualization in KVM/SVM */
199static int nested = true;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800200module_param(nested, int, S_IRUGO);
201
202static void svm_flush_tlb(struct kvm_vcpu *vcpu);
Joerg Roedela5c38322009-08-07 11:49:32 +0200203static void svm_complete_interrupts(struct vcpu_svm *svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800204
Joerg Roedel410e4d52009-08-07 11:49:44 +0200205static int nested_svm_exit_handled(struct vcpu_svm *svm);
Joerg Roedelb8e88bc2010-02-19 16:23:02 +0100206static int nested_svm_intercept(struct vcpu_svm *svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800207static int nested_svm_vmexit(struct vcpu_svm *svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800208static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
209 bool has_error_code, u32 error_code);
Joerg Roedel92a1f122011-03-25 09:44:51 +0100210static u64 __scale_tsc(u64 ratio, u64 tsc);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800211
Roedel, Joerg8d28fec2010-12-03 13:15:21 +0100212enum {
Joerg Roedel116a0a22010-12-03 11:45:49 +0100213 VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
214 pause filter count */
Joerg Roedelf56838e2010-12-03 11:45:50 +0100215 VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */
Joerg Roedeld48086d2010-12-03 11:45:51 +0100216 VMCB_ASID, /* ASID */
Joerg Roedeldecdbf62010-12-03 11:45:52 +0100217 VMCB_INTR, /* int_ctl, int_vector */
Joerg Roedelb2747162010-12-03 11:45:53 +0100218 VMCB_NPT, /* npt_en, nCR3, gPAT */
Joerg Roedeldcca1a62010-12-03 11:45:54 +0100219 VMCB_CR, /* CR0, CR3, CR4, EFER */
Joerg Roedel72214b92010-12-03 11:45:55 +0100220 VMCB_DR, /* DR6, DR7 */
Joerg Roedel17a703c2010-12-03 11:45:56 +0100221 VMCB_DT, /* GDT, IDT */
Joerg Roedel060d0c92010-12-03 11:45:57 +0100222 VMCB_SEG, /* CS, DS, SS, ES, CPL */
Joerg Roedel0574dec2010-12-03 11:45:58 +0100223 VMCB_CR2, /* CR2 only */
Joerg Roedelb53ba3f2010-12-03 11:45:59 +0100224 VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
Roedel, Joerg8d28fec2010-12-03 13:15:21 +0100225 VMCB_DIRTY_MAX,
226};
227
Joerg Roedel0574dec2010-12-03 11:45:58 +0100228/* TPR and CR2 are always written before VMRUN */
229#define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
Roedel, Joerg8d28fec2010-12-03 13:15:21 +0100230
231static inline void mark_all_dirty(struct vmcb *vmcb)
232{
233 vmcb->control.clean = 0;
234}
235
236static inline void mark_all_clean(struct vmcb *vmcb)
237{
238 vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
239 & ~VMCB_ALWAYS_DIRTY_MASK;
240}
241
242static inline void mark_dirty(struct vmcb *vmcb, int bit)
243{
244 vmcb->control.clean &= ~(1 << bit);
245}
246
Avi Kivity6aa8b732006-12-10 02:21:36 -0800247static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
248{
249 return container_of(vcpu, struct vcpu_svm, vcpu);
250}
251
Joerg Roedel384c6362010-11-30 18:03:56 +0100252static void recalc_intercepts(struct vcpu_svm *svm)
253{
254 struct vmcb_control_area *c, *h;
255 struct nested_state *g;
256
Joerg Roedel116a0a22010-12-03 11:45:49 +0100257 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
258
Joerg Roedel384c6362010-11-30 18:03:56 +0100259 if (!is_guest_mode(&svm->vcpu))
260 return;
261
262 c = &svm->vmcb->control;
263 h = &svm->nested.hsave->control;
264 g = &svm->nested;
265
Roedel, Joerg4ee546b2010-12-03 10:50:51 +0100266 c->intercept_cr = h->intercept_cr | g->intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +0100267 c->intercept_dr = h->intercept_dr | g->intercept_dr;
Joerg Roedel384c6362010-11-30 18:03:56 +0100268 c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
269 c->intercept = h->intercept | g->intercept;
270}
271
Roedel, Joerg4ee546b2010-12-03 10:50:51 +0100272static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
273{
274 if (is_guest_mode(&svm->vcpu))
275 return svm->nested.hsave;
276 else
277 return svm->vmcb;
278}
279
280static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
281{
282 struct vmcb *vmcb = get_host_vmcb(svm);
283
284 vmcb->control.intercept_cr |= (1U << bit);
285
286 recalc_intercepts(svm);
287}
288
289static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
290{
291 struct vmcb *vmcb = get_host_vmcb(svm);
292
293 vmcb->control.intercept_cr &= ~(1U << bit);
294
295 recalc_intercepts(svm);
296}
297
298static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
299{
300 struct vmcb *vmcb = get_host_vmcb(svm);
301
302 return vmcb->control.intercept_cr & (1U << bit);
303}
304
Joerg Roedel3aed0412010-11-30 18:03:58 +0100305static inline void set_dr_intercept(struct vcpu_svm *svm, int bit)
306{
307 struct vmcb *vmcb = get_host_vmcb(svm);
308
309 vmcb->control.intercept_dr |= (1U << bit);
310
311 recalc_intercepts(svm);
312}
313
314static inline void clr_dr_intercept(struct vcpu_svm *svm, int bit)
315{
316 struct vmcb *vmcb = get_host_vmcb(svm);
317
318 vmcb->control.intercept_dr &= ~(1U << bit);
319
320 recalc_intercepts(svm);
321}
322
Joerg Roedel18c918c2010-11-30 18:03:59 +0100323static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
324{
325 struct vmcb *vmcb = get_host_vmcb(svm);
326
327 vmcb->control.intercept_exceptions |= (1U << bit);
328
329 recalc_intercepts(svm);
330}
331
332static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
333{
334 struct vmcb *vmcb = get_host_vmcb(svm);
335
336 vmcb->control.intercept_exceptions &= ~(1U << bit);
337
338 recalc_intercepts(svm);
339}
340
Joerg Roedel8a05a1b82010-11-30 18:04:00 +0100341static inline void set_intercept(struct vcpu_svm *svm, int bit)
342{
343 struct vmcb *vmcb = get_host_vmcb(svm);
344
345 vmcb->control.intercept |= (1ULL << bit);
346
347 recalc_intercepts(svm);
348}
349
350static inline void clr_intercept(struct vcpu_svm *svm, int bit)
351{
352 struct vmcb *vmcb = get_host_vmcb(svm);
353
354 vmcb->control.intercept &= ~(1ULL << bit);
355
356 recalc_intercepts(svm);
357}
358
Joerg Roedel2af91942009-08-07 11:49:28 +0200359static inline void enable_gif(struct vcpu_svm *svm)
360{
361 svm->vcpu.arch.hflags |= HF_GIF_MASK;
362}
363
364static inline void disable_gif(struct vcpu_svm *svm)
365{
366 svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
367}
368
369static inline bool gif_set(struct vcpu_svm *svm)
370{
371 return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
372}
373
Avi Kivity6aa8b732006-12-10 02:21:36 -0800374static unsigned long iopm_base;
375
376struct kvm_ldttss_desc {
377 u16 limit0;
378 u16 base0;
Joerg Roedele0231712010-02-24 18:59:10 +0100379 unsigned base1:8, type:5, dpl:2, p:1;
380 unsigned limit1:4, zero0:3, g:1, base2:8;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800381 u32 base3;
382 u32 zero1;
383} __attribute__((packed));
384
385struct svm_cpu_data {
386 int cpu;
387
Avi Kivity5008fdf2007-04-02 13:05:50 +0300388 u64 asid_generation;
389 u32 max_asid;
390 u32 next_asid;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800391 struct kvm_ldttss_desc *tss_desc;
392
393 struct page *save_area;
394};
395
396static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
397
398struct svm_init_data {
399 int cpu;
400 int r;
401};
402
Mathias Krause09941fb2012-08-30 01:30:20 +0200403static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
Avi Kivity6aa8b732006-12-10 02:21:36 -0800404
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200405#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800406#define MSRS_RANGE_SIZE 2048
407#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
408
Joerg Roedel455716f2010-03-01 15:34:35 +0100409static u32 svm_msrpm_offset(u32 msr)
410{
411 u32 offset;
412 int i;
413
414 for (i = 0; i < NUM_MSR_MAPS; i++) {
415 if (msr < msrpm_ranges[i] ||
416 msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
417 continue;
418
419 offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
420 offset += (i * MSRS_RANGE_SIZE); /* add range offset */
421
422 /* Now we have the u8 offset - but need the u32 offset */
423 return offset / 4;
424 }
425
426 /* MSR not in any range */
427 return MSR_INVALID;
428}
429
Avi Kivity6aa8b732006-12-10 02:21:36 -0800430#define MAX_INST_SIZE 15
431
Avi Kivity6aa8b732006-12-10 02:21:36 -0800432static inline void clgi(void)
433{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300434 asm volatile (__ex(SVM_CLGI));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800435}
436
437static inline void stgi(void)
438{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300439 asm volatile (__ex(SVM_STGI));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800440}
441
442static inline void invlpga(unsigned long addr, u32 asid)
443{
Joerg Roedele0231712010-02-24 18:59:10 +0100444 asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800445}
446
Joerg Roedel4b161842010-09-10 17:31:03 +0200447static int get_npt_level(void)
448{
449#ifdef CONFIG_X86_64
450 return PT64_ROOT_LEVEL;
451#else
452 return PT32E_ROOT_LEVEL;
453#endif
454}
455
Avi Kivity6aa8b732006-12-10 02:21:36 -0800456static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
457{
Zachary Amsden6dc696d2010-05-26 15:09:43 -1000458 vcpu->arch.efer = efer;
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100459 if (!npt_enabled && !(efer & EFER_LMA))
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -0600460 efer &= ~EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800461
Alexander Graf9962d032008-11-25 20:17:02 +0100462 to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
Joerg Roedeldcca1a62010-12-03 11:45:54 +0100463 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800464}
465
Avi Kivity6aa8b732006-12-10 02:21:36 -0800466static int is_external_interrupt(u32 info)
467{
468 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
469 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
470}
471
Glauber Costa2809f5d2009-05-12 16:21:05 -0400472static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
473{
474 struct vcpu_svm *svm = to_svm(vcpu);
475 u32 ret = 0;
476
477 if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
Jan Kiszka48005f62010-02-19 19:38:07 +0100478 ret |= KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400479 return ret & mask;
480}
481
482static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
483{
484 struct vcpu_svm *svm = to_svm(vcpu);
485
486 if (mask == 0)
487 svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
488 else
489 svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
490
491}
492
Avi Kivity6aa8b732006-12-10 02:21:36 -0800493static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
494{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400495 struct vcpu_svm *svm = to_svm(vcpu);
496
Andre Przywara6bc31bd2010-04-11 23:07:28 +0200497 if (svm->vmcb->control.next_rip != 0)
498 svm->next_rip = svm->vmcb->control.next_rip;
499
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400500 if (!svm->next_rip) {
Andre Przywara51d8b662010-12-21 11:12:02 +0100501 if (emulate_instruction(vcpu, EMULTYPE_SKIP) !=
Gleb Natapovf629cf82009-05-11 13:35:49 +0300502 EMULATE_DONE)
503 printk(KERN_DEBUG "%s: NOP\n", __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800504 return;
505 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300506 if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
507 printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
508 __func__, kvm_rip_read(vcpu), svm->next_rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800509
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300510 kvm_rip_write(vcpu, svm->next_rip);
Glauber Costa2809f5d2009-05-12 16:21:05 -0400511 svm_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800512}
513
Jan Kiszka116a4752010-02-23 17:47:54 +0100514static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200515 bool has_error_code, u32 error_code,
516 bool reinject)
Jan Kiszka116a4752010-02-23 17:47:54 +0100517{
518 struct vcpu_svm *svm = to_svm(vcpu);
519
Joerg Roedele0231712010-02-24 18:59:10 +0100520 /*
521 * If we are within a nested VM we'd better #VMEXIT and let the guest
522 * handle the exception
523 */
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200524 if (!reinject &&
525 nested_svm_check_exception(svm, nr, has_error_code, error_code))
Jan Kiszka116a4752010-02-23 17:47:54 +0100526 return;
527
Avi Kivity2a6b20b2010-11-09 16:15:42 +0200528 if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
Jan Kiszka66b71382010-02-23 17:47:56 +0100529 unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
530
531 /*
532 * For guest debugging where we have to reinject #BP if some
533 * INT3 is guest-owned:
534 * Emulate nRIP by moving RIP forward. Will fail if injection
535 * raises a fault that is not intercepted. Still better than
536 * failing in all cases.
537 */
538 skip_emulated_instruction(&svm->vcpu);
539 rip = kvm_rip_read(&svm->vcpu);
540 svm->int3_rip = rip + svm->vmcb->save.cs.base;
541 svm->int3_injected = rip - old_rip;
542 }
543
Jan Kiszka116a4752010-02-23 17:47:54 +0100544 svm->vmcb->control.event_inj = nr
545 | SVM_EVTINJ_VALID
546 | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
547 | SVM_EVTINJ_TYPE_EXEPT;
548 svm->vmcb->control.event_inj_err = error_code;
549}
550
Joerg Roedel67ec6602010-05-17 14:43:35 +0200551static void svm_init_erratum_383(void)
552{
553 u32 low, high;
554 int err;
555 u64 val;
556
Hans Rosenfeld1be85a62010-07-28 19:09:32 +0200557 if (!cpu_has_amd_erratum(amd_erratum_383))
Joerg Roedel67ec6602010-05-17 14:43:35 +0200558 return;
559
560 /* Use _safe variants to not break nested virtualization */
561 val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
562 if (err)
563 return;
564
565 val |= (1ULL << 47);
566
567 low = lower_32_bits(val);
568 high = upper_32_bits(val);
569
570 native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);
571
572 erratum_383_found = true;
573}
574
Boris Ostrovsky2b036c62012-01-09 14:00:35 -0500575static void svm_init_osvw(struct kvm_vcpu *vcpu)
576{
577 /*
578 * Guests should see errata 400 and 415 as fixed (assuming that
579 * HLT and IO instructions are intercepted).
580 */
581 vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
582 vcpu->arch.osvw.status = osvw_status & ~(6ULL);
583
584 /*
585 * By increasing VCPU's osvw.length to 3 we are telling the guest that
586 * all osvw.status bits inside that length, including bit 0 (which is
587 * reserved for erratum 298), are valid. However, if host processor's
588 * osvw_len is 0 then osvw_status[0] carries no information. We need to
589 * be conservative here and therefore we tell the guest that erratum 298
590 * is present (because we really don't know).
591 */
592 if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
593 vcpu->arch.osvw.status |= 1;
594}
595
Avi Kivity6aa8b732006-12-10 02:21:36 -0800596static int has_svm(void)
597{
Eduardo Habkost63d11422008-11-17 19:03:20 -0200598 const char *msg;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800599
Eduardo Habkost63d11422008-11-17 19:03:20 -0200600 if (!cpu_has_svm(&msg)) {
Joe Perchesff81ff12009-01-08 11:05:17 -0800601 printk(KERN_INFO "has_svm: %s\n", msg);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800602 return 0;
603 }
604
Avi Kivity6aa8b732006-12-10 02:21:36 -0800605 return 1;
606}
607
608static void svm_hardware_disable(void *garbage)
609{
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100610 /* Make sure we clean up behind us */
611 if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
612 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
613
Eduardo Habkost2c8dcee2008-11-17 19:03:21 -0200614 cpu_svm_disable();
Joerg Roedel1018faa2012-02-29 14:57:32 +0100615
616 amd_pmu_disable_virt();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800617}
618
Alexander Graf10474ae2009-09-15 11:37:46 +0200619static int svm_hardware_enable(void *garbage)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800620{
621
Tejun Heo0fe1e002009-10-29 22:34:14 +0900622 struct svm_cpu_data *sd;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800623 uint64_t efer;
Gleb Natapov89a27f42010-02-16 10:51:48 +0200624 struct desc_ptr gdt_descr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800625 struct desc_struct *gdt;
626 int me = raw_smp_processor_id();
627
Alexander Graf10474ae2009-09-15 11:37:46 +0200628 rdmsrl(MSR_EFER, efer);
629 if (efer & EFER_SVME)
630 return -EBUSY;
631
Avi Kivity6aa8b732006-12-10 02:21:36 -0800632 if (!has_svm()) {
Zachary Amsdene6732a52009-09-29 11:38:36 -1000633 printk(KERN_ERR "svm_hardware_enable: err EOPNOTSUPP on %d\n",
634 me);
Alexander Graf10474ae2009-09-15 11:37:46 +0200635 return -EINVAL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800636 }
Tejun Heo0fe1e002009-10-29 22:34:14 +0900637 sd = per_cpu(svm_data, me);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800638
Tejun Heo0fe1e002009-10-29 22:34:14 +0900639 if (!sd) {
Zachary Amsdene6732a52009-09-29 11:38:36 -1000640 printk(KERN_ERR "svm_hardware_enable: svm_data is NULL on %d\n",
Avi Kivity6aa8b732006-12-10 02:21:36 -0800641 me);
Alexander Graf10474ae2009-09-15 11:37:46 +0200642 return -EINVAL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800643 }
644
Tejun Heo0fe1e002009-10-29 22:34:14 +0900645 sd->asid_generation = 1;
646 sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
647 sd->next_asid = sd->max_asid + 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800648
Gleb Natapovd6ab1ed2010-02-25 12:43:07 +0200649 native_store_gdt(&gdt_descr);
Gleb Natapov89a27f42010-02-16 10:51:48 +0200650 gdt = (struct desc_struct *)gdt_descr.address;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900651 sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800652
Alexander Graf9962d032008-11-25 20:17:02 +0100653 wrmsrl(MSR_EFER, efer | EFER_SVME);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800654
Linus Torvaldsd0316552009-12-14 09:58:24 -0800655 wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
Alexander Graf10474ae2009-09-15 11:37:46 +0200656
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100657 if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
658 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
659 __get_cpu_var(current_tsc_ratio) = TSC_RATIO_DEFAULT;
660 }
661
Boris Ostrovsky2b036c62012-01-09 14:00:35 -0500662
663 /*
664 * Get OSVW bits.
665 *
666 * Note that it is possible to have a system with mixed processor
667 * revisions and therefore different OSVW bits. If bits are not the same
668 * on different processors then choose the worst case (i.e. if erratum
669 * is present on one processor and not on another then assume that the
670 * erratum is present everywhere).
671 */
672 if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
673 uint64_t len, status = 0;
674 int err;
675
676 len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
677 if (!err)
678 status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
679 &err);
680
681 if (err)
682 osvw_status = osvw_len = 0;
683 else {
684 if (len < osvw_len)
685 osvw_len = len;
686 osvw_status |= status;
687 osvw_status &= (1ULL << osvw_len) - 1;
688 }
689 } else
690 osvw_status = osvw_len = 0;
691
Joerg Roedel67ec6602010-05-17 14:43:35 +0200692 svm_init_erratum_383();
693
Joerg Roedel1018faa2012-02-29 14:57:32 +0100694 amd_pmu_enable_virt();
695
Alexander Graf10474ae2009-09-15 11:37:46 +0200696 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800697}
698
Joerg Roedel0da1db752008-07-02 16:02:11 +0200699static void svm_cpu_uninit(int cpu)
700{
Tejun Heo0fe1e002009-10-29 22:34:14 +0900701 struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
Joerg Roedel0da1db752008-07-02 16:02:11 +0200702
Tejun Heo0fe1e002009-10-29 22:34:14 +0900703 if (!sd)
Joerg Roedel0da1db752008-07-02 16:02:11 +0200704 return;
705
706 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900707 __free_page(sd->save_area);
708 kfree(sd);
Joerg Roedel0da1db752008-07-02 16:02:11 +0200709}
710
Avi Kivity6aa8b732006-12-10 02:21:36 -0800711static int svm_cpu_init(int cpu)
712{
Tejun Heo0fe1e002009-10-29 22:34:14 +0900713 struct svm_cpu_data *sd;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800714 int r;
715
Tejun Heo0fe1e002009-10-29 22:34:14 +0900716 sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
717 if (!sd)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800718 return -ENOMEM;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900719 sd->cpu = cpu;
720 sd->save_area = alloc_page(GFP_KERNEL);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800721 r = -ENOMEM;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900722 if (!sd->save_area)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800723 goto err_1;
724
Tejun Heo0fe1e002009-10-29 22:34:14 +0900725 per_cpu(svm_data, cpu) = sd;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800726
727 return 0;
728
729err_1:
Tejun Heo0fe1e002009-10-29 22:34:14 +0900730 kfree(sd);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800731 return r;
732
733}
734
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100735static bool valid_msr_intercept(u32 index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800736{
737 int i;
738
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100739 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
740 if (direct_access_msrs[i].index == index)
741 return true;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800742
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100743 return false;
744}
745
Avi Kivity6aa8b732006-12-10 02:21:36 -0800746static void set_msr_interception(u32 *msrpm, unsigned msr,
747 int read, int write)
748{
Joerg Roedel455716f2010-03-01 15:34:35 +0100749 u8 bit_read, bit_write;
750 unsigned long tmp;
751 u32 offset;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800752
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100753 /*
754 * If this warning triggers extend the direct_access_msrs list at the
755 * beginning of the file
756 */
757 WARN_ON(!valid_msr_intercept(msr));
758
Joerg Roedel455716f2010-03-01 15:34:35 +0100759 offset = svm_msrpm_offset(msr);
760 bit_read = 2 * (msr & 0x0f);
761 bit_write = 2 * (msr & 0x0f) + 1;
762 tmp = msrpm[offset];
Avi Kivity6aa8b732006-12-10 02:21:36 -0800763
Joerg Roedel455716f2010-03-01 15:34:35 +0100764 BUG_ON(offset == MSR_INVALID);
765
766 read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp);
767 write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);
768
769 msrpm[offset] = tmp;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800770}
771
Joerg Roedelf65c2292008-02-13 18:58:46 +0100772static void svm_vcpu_init_msrpm(u32 *msrpm)
773{
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100774 int i;
775
Joerg Roedelf65c2292008-02-13 18:58:46 +0100776 memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
777
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100778 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
779 if (!direct_access_msrs[i].always)
780 continue;
781
782 set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
783 }
Joerg Roedelf65c2292008-02-13 18:58:46 +0100784}
785
Joerg Roedel323c3d82010-03-01 15:34:37 +0100786static void add_msr_offset(u32 offset)
787{
788 int i;
789
790 for (i = 0; i < MSRPM_OFFSETS; ++i) {
791
792 /* Offset already in list? */
793 if (msrpm_offsets[i] == offset)
794 return;
795
796 /* Slot used by another offset? */
797 if (msrpm_offsets[i] != MSR_INVALID)
798 continue;
799
800 /* Add offset to list */
801 msrpm_offsets[i] = offset;
802
803 return;
804 }
805
806 /*
807 * If this BUG triggers the msrpm_offsets table has an overflow. Just
808 * increase MSRPM_OFFSETS in this case.
809 */
810 BUG();
811}
812
813static void init_msrpm_offsets(void)
814{
815 int i;
816
817 memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));
818
819 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
820 u32 offset;
821
822 offset = svm_msrpm_offset(direct_access_msrs[i].index);
823 BUG_ON(offset == MSR_INVALID);
824
825 add_msr_offset(offset);
826 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800827}
828
Joerg Roedel24e09cb2008-02-13 18:58:47 +0100829static void svm_enable_lbrv(struct vcpu_svm *svm)
830{
831 u32 *msrpm = svm->msrpm;
832
833 svm->vmcb->control.lbr_ctl = 1;
834 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
835 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
836 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
837 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
838}
839
840static void svm_disable_lbrv(struct vcpu_svm *svm)
841{
842 u32 *msrpm = svm->msrpm;
843
844 svm->vmcb->control.lbr_ctl = 0;
845 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
846 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
847 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
848 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
849}
850
Avi Kivity6aa8b732006-12-10 02:21:36 -0800851static __init int svm_hardware_setup(void)
852{
853 int cpu;
854 struct page *iopm_pages;
Joerg Roedelf65c2292008-02-13 18:58:46 +0100855 void *iopm_va;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800856 int r;
857
Avi Kivity6aa8b732006-12-10 02:21:36 -0800858 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
859
860 if (!iopm_pages)
861 return -ENOMEM;
Anthony Liguoric8681332007-04-30 09:48:11 +0300862
863 iopm_va = page_address(iopm_pages);
864 memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800865 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
866
Joerg Roedel323c3d82010-03-01 15:34:37 +0100867 init_msrpm_offsets();
868
Joerg Roedel50a37eb2008-01-31 14:57:38 +0100869 if (boot_cpu_has(X86_FEATURE_NX))
870 kvm_enable_efer_bits(EFER_NX);
871
Alexander Graf1b2fd702009-02-02 16:23:51 +0100872 if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
873 kvm_enable_efer_bits(EFER_FFXSR);
874
Joerg Roedel92a1f122011-03-25 09:44:51 +0100875 if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
876 u64 max;
877
878 kvm_has_tsc_control = true;
879
880 /*
881 * Make sure the user can only configure tsc_khz values that
882 * fit into a signed integer.
883 * A min value is not calculated needed because it will always
884 * be 1 on all machines and a value of 0 is used to disable
885 * tsc-scaling for the vcpu.
886 */
887 max = min(0x7fffffffULL, __scale_tsc(tsc_khz, TSC_RATIO_MAX));
888
889 kvm_max_guest_tsc_khz = max;
890 }
891
Alexander Graf236de052008-11-25 20:17:10 +0100892 if (nested) {
893 printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
Joerg Roedeleec4b142010-05-05 16:04:44 +0200894 kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
Alexander Graf236de052008-11-25 20:17:10 +0100895 }
896
Zachary Amsden3230bb42009-09-29 11:38:37 -1000897 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800898 r = svm_cpu_init(cpu);
899 if (r)
Joerg Roedelf65c2292008-02-13 18:58:46 +0100900 goto err;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800901 }
Joerg Roedel33bd6a02008-02-07 13:47:38 +0100902
Avi Kivity2a6b20b2010-11-09 16:15:42 +0200903 if (!boot_cpu_has(X86_FEATURE_NPT))
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100904 npt_enabled = false;
905
Joerg Roedel6c7dac72008-02-07 13:47:40 +0100906 if (npt_enabled && !npt) {
907 printk(KERN_INFO "kvm: Nested Paging disabled\n");
908 npt_enabled = false;
909 }
910
Joerg Roedel18552672008-02-07 13:47:41 +0100911 if (npt_enabled) {
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100912 printk(KERN_INFO "kvm: Nested Paging enabled\n");
Joerg Roedel18552672008-02-07 13:47:41 +0100913 kvm_enable_tdp();
Joerg Roedel5f4cb662008-07-14 20:36:36 +0200914 } else
915 kvm_disable_tdp();
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100916
Avi Kivity6aa8b732006-12-10 02:21:36 -0800917 return 0;
918
Joerg Roedelf65c2292008-02-13 18:58:46 +0100919err:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800920 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
921 iopm_base = 0;
922 return r;
923}
924
925static __exit void svm_hardware_unsetup(void)
926{
Joerg Roedel0da1db752008-07-02 16:02:11 +0200927 int cpu;
928
Zachary Amsden3230bb42009-09-29 11:38:37 -1000929 for_each_possible_cpu(cpu)
Joerg Roedel0da1db752008-07-02 16:02:11 +0200930 svm_cpu_uninit(cpu);
931
Avi Kivity6aa8b732006-12-10 02:21:36 -0800932 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
Joerg Roedelf65c2292008-02-13 18:58:46 +0100933 iopm_base = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800934}
935
936static void init_seg(struct vmcb_seg *seg)
937{
938 seg->selector = 0;
939 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
Joerg Roedele0231712010-02-24 18:59:10 +0100940 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800941 seg->limit = 0xffff;
942 seg->base = 0;
943}
944
945static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
946{
947 seg->selector = 0;
948 seg->attrib = SVM_SELECTOR_P_MASK | type;
949 seg->limit = 0xffff;
950 seg->base = 0;
951}
952
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100953static u64 __scale_tsc(u64 ratio, u64 tsc)
954{
955 u64 mult, frac, _tsc;
956
957 mult = ratio >> 32;
958 frac = ratio & ((1ULL << 32) - 1);
959
960 _tsc = tsc;
961 _tsc *= mult;
962 _tsc += (tsc >> 32) * frac;
963 _tsc += ((tsc & ((1ULL << 32) - 1)) * frac) >> 32;
964
965 return _tsc;
966}
967
968static u64 svm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc)
969{
970 struct vcpu_svm *svm = to_svm(vcpu);
971 u64 _tsc = tsc;
972
973 if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
974 _tsc = __scale_tsc(svm->tsc_ratio, tsc);
975
976 return _tsc;
977}
978
Zachary Amsdencc578282012-02-03 15:43:50 -0200979static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
Joerg Roedel4051b182011-03-25 09:44:49 +0100980{
981 struct vcpu_svm *svm = to_svm(vcpu);
982 u64 ratio;
983 u64 khz;
984
Zachary Amsdencc578282012-02-03 15:43:50 -0200985 /* Guest TSC same frequency as host TSC? */
986 if (!scale) {
Joerg Roedel4051b182011-03-25 09:44:49 +0100987 svm->tsc_ratio = TSC_RATIO_DEFAULT;
988 return;
989 }
990
Zachary Amsdencc578282012-02-03 15:43:50 -0200991 /* TSC scaling supported? */
992 if (!boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
993 if (user_tsc_khz > tsc_khz) {
994 vcpu->arch.tsc_catchup = 1;
995 vcpu->arch.tsc_always_catchup = 1;
996 } else
997 WARN(1, "user requested TSC rate below hardware speed\n");
998 return;
999 }
1000
Joerg Roedel4051b182011-03-25 09:44:49 +01001001 khz = user_tsc_khz;
1002
1003 /* TSC scaling required - calculate ratio */
1004 ratio = khz << 32;
1005 do_div(ratio, tsc_khz);
1006
1007 if (ratio == 0 || ratio & TSC_RATIO_RSVD) {
1008 WARN_ONCE(1, "Invalid TSC ratio - virtual-tsc-khz=%u\n",
1009 user_tsc_khz);
1010 return;
1011 }
Joerg Roedel4051b182011-03-25 09:44:49 +01001012 svm->tsc_ratio = ratio;
1013}
1014
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001015static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1016{
1017 struct vcpu_svm *svm = to_svm(vcpu);
1018 u64 g_tsc_offset = 0;
1019
Joerg Roedel20307532010-11-29 17:51:48 +01001020 if (is_guest_mode(vcpu)) {
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001021 g_tsc_offset = svm->vmcb->control.tsc_offset -
1022 svm->nested.hsave->control.tsc_offset;
1023 svm->nested.hsave->control.tsc_offset = offset;
1024 }
1025
1026 svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
Joerg Roedel116a0a22010-12-03 11:45:49 +01001027
1028 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001029}
1030
Marcelo Tosattif1e2b262012-02-03 15:43:55 -02001031static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
Zachary Amsdene48672f2010-08-19 22:07:23 -10001032{
1033 struct vcpu_svm *svm = to_svm(vcpu);
1034
Marcelo Tosattif1e2b262012-02-03 15:43:55 -02001035 WARN_ON(adjustment < 0);
1036 if (host)
1037 adjustment = svm_scale_tsc(vcpu, adjustment);
1038
Zachary Amsdene48672f2010-08-19 22:07:23 -10001039 svm->vmcb->control.tsc_offset += adjustment;
Joerg Roedel20307532010-11-29 17:51:48 +01001040 if (is_guest_mode(vcpu))
Zachary Amsdene48672f2010-08-19 22:07:23 -10001041 svm->nested.hsave->control.tsc_offset += adjustment;
Joerg Roedel116a0a22010-12-03 11:45:49 +01001042 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
Zachary Amsdene48672f2010-08-19 22:07:23 -10001043}
1044
Joerg Roedel857e4092011-03-25 09:44:50 +01001045static u64 svm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc)
1046{
1047 u64 tsc;
1048
1049 tsc = svm_scale_tsc(vcpu, native_read_tsc());
1050
1051 return target_tsc - tsc;
1052}
1053
Joerg Roedele6101a92008-02-13 18:58:45 +01001054static void init_vmcb(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001055{
Joerg Roedele6101a92008-02-13 18:58:45 +01001056 struct vmcb_control_area *control = &svm->vmcb->control;
1057 struct vmcb_save_area *save = &svm->vmcb->save;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001058
Avi Kivitybff78272010-01-07 13:16:08 +02001059 svm->vcpu.fpu_active = 1;
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001060 svm->vcpu.arch.hflags = 0;
Avi Kivitybff78272010-01-07 13:16:08 +02001061
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001062 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1063 set_cr_intercept(svm, INTERCEPT_CR3_READ);
1064 set_cr_intercept(svm, INTERCEPT_CR4_READ);
1065 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
1066 set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1067 set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
1068 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001069
Joerg Roedel3aed0412010-11-30 18:03:58 +01001070 set_dr_intercept(svm, INTERCEPT_DR0_READ);
1071 set_dr_intercept(svm, INTERCEPT_DR1_READ);
1072 set_dr_intercept(svm, INTERCEPT_DR2_READ);
1073 set_dr_intercept(svm, INTERCEPT_DR3_READ);
1074 set_dr_intercept(svm, INTERCEPT_DR4_READ);
1075 set_dr_intercept(svm, INTERCEPT_DR5_READ);
1076 set_dr_intercept(svm, INTERCEPT_DR6_READ);
1077 set_dr_intercept(svm, INTERCEPT_DR7_READ);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001078
Joerg Roedel3aed0412010-11-30 18:03:58 +01001079 set_dr_intercept(svm, INTERCEPT_DR0_WRITE);
1080 set_dr_intercept(svm, INTERCEPT_DR1_WRITE);
1081 set_dr_intercept(svm, INTERCEPT_DR2_WRITE);
1082 set_dr_intercept(svm, INTERCEPT_DR3_WRITE);
1083 set_dr_intercept(svm, INTERCEPT_DR4_WRITE);
1084 set_dr_intercept(svm, INTERCEPT_DR5_WRITE);
1085 set_dr_intercept(svm, INTERCEPT_DR6_WRITE);
1086 set_dr_intercept(svm, INTERCEPT_DR7_WRITE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001087
Joerg Roedel18c918c2010-11-30 18:03:59 +01001088 set_exception_intercept(svm, PF_VECTOR);
1089 set_exception_intercept(svm, UD_VECTOR);
1090 set_exception_intercept(svm, MC_VECTOR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001091
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01001092 set_intercept(svm, INTERCEPT_INTR);
1093 set_intercept(svm, INTERCEPT_NMI);
1094 set_intercept(svm, INTERCEPT_SMI);
1095 set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
Avi Kivity332b56e2011-11-10 14:57:24 +02001096 set_intercept(svm, INTERCEPT_RDPMC);
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01001097 set_intercept(svm, INTERCEPT_CPUID);
1098 set_intercept(svm, INTERCEPT_INVD);
1099 set_intercept(svm, INTERCEPT_HLT);
1100 set_intercept(svm, INTERCEPT_INVLPG);
1101 set_intercept(svm, INTERCEPT_INVLPGA);
1102 set_intercept(svm, INTERCEPT_IOIO_PROT);
1103 set_intercept(svm, INTERCEPT_MSR_PROT);
1104 set_intercept(svm, INTERCEPT_TASK_SWITCH);
1105 set_intercept(svm, INTERCEPT_SHUTDOWN);
1106 set_intercept(svm, INTERCEPT_VMRUN);
1107 set_intercept(svm, INTERCEPT_VMMCALL);
1108 set_intercept(svm, INTERCEPT_VMLOAD);
1109 set_intercept(svm, INTERCEPT_VMSAVE);
1110 set_intercept(svm, INTERCEPT_STGI);
1111 set_intercept(svm, INTERCEPT_CLGI);
1112 set_intercept(svm, INTERCEPT_SKINIT);
1113 set_intercept(svm, INTERCEPT_WBINVD);
1114 set_intercept(svm, INTERCEPT_MONITOR);
1115 set_intercept(svm, INTERCEPT_MWAIT);
Joerg Roedel81dd35d2010-12-07 17:15:06 +01001116 set_intercept(svm, INTERCEPT_XSETBV);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001117
1118 control->iopm_base_pa = iopm_base;
Joerg Roedelf65c2292008-02-13 18:58:46 +01001119 control->msrpm_base_pa = __pa(svm->msrpm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001120 control->int_ctl = V_INTR_MASKING_MASK;
1121
1122 init_seg(&save->es);
1123 init_seg(&save->ss);
1124 init_seg(&save->ds);
1125 init_seg(&save->fs);
1126 init_seg(&save->gs);
1127
1128 save->cs.selector = 0xf000;
1129 /* Executable/Readable Code Segment */
1130 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
1131 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
1132 save->cs.limit = 0xffff;
Avi Kivityd92899a2007-02-12 00:54:38 -08001133 /*
1134 * cs.base should really be 0xffff0000, but vmx can't handle that, so
1135 * be consistent with it.
1136 *
1137 * Replace when we have real mode working for vmx.
1138 */
1139 save->cs.base = 0xf0000;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001140
1141 save->gdtr.limit = 0xffff;
1142 save->idtr.limit = 0xffff;
1143
1144 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
1145 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
1146
Marcelo Tosattieaa48512010-08-31 19:13:14 -03001147 svm_set_efer(&svm->vcpu, 0);
Mike Dayd77c26f2007-10-08 09:02:08 -04001148 save->dr6 = 0xffff0ff0;
Avi Kivityf6e78472010-08-02 15:30:20 +03001149 kvm_set_rflags(&svm->vcpu, 2);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001150 save->rip = 0x0000fff0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001151 svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001152
Joerg Roedele0231712010-02-24 18:59:10 +01001153 /*
1154 * This is the guest-visible cr0 value.
Eduardo Habkost18fa0002009-10-24 02:49:59 -02001155 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
Avi Kivity6aa8b732006-12-10 02:21:36 -08001156 */
Marcelo Tosatti678041a2010-08-31 19:13:13 -03001157 svm->vcpu.arch.cr0 = 0;
1158 (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
Eduardo Habkost18fa0002009-10-24 02:49:59 -02001159
Rusty Russell66aee912007-07-17 23:34:16 +10001160 save->cr4 = X86_CR4_PAE;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001161 /* rdx = ?? */
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001162
1163 if (npt_enabled) {
1164 /* Setup VMCB for Nested Paging */
1165 control->nested_ctl = 1;
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01001166 clr_intercept(svm, INTERCEPT_INVLPG);
Joerg Roedel18c918c2010-11-30 18:03:59 +01001167 clr_exception_intercept(svm, PF_VECTOR);
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001168 clr_cr_intercept(svm, INTERCEPT_CR3_READ);
1169 clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001170 save->g_pat = 0x0007040600070406ULL;
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001171 save->cr3 = 0;
1172 save->cr4 = 0;
1173 }
Joerg Roedelf40f6a42010-12-03 15:25:15 +01001174 svm->asid_generation = 0;
Alexander Graf1371d902008-11-25 20:17:04 +01001175
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001176 svm->nested.vmcb = 0;
Joerg Roedel2af91942009-08-07 11:49:28 +02001177 svm->vcpu.arch.hflags = 0;
1178
Avi Kivity2a6b20b2010-11-09 16:15:42 +02001179 if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
Mark Langsdorf565d0992009-10-06 14:25:02 -05001180 control->pause_filter_count = 3000;
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01001181 set_intercept(svm, INTERCEPT_PAUSE);
Mark Langsdorf565d0992009-10-06 14:25:02 -05001182 }
1183
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01001184 mark_all_dirty(svm->vmcb);
1185
Joerg Roedel2af91942009-08-07 11:49:28 +02001186 enable_gif(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001187}
1188
Avi Kivitye00c8cf2007-10-21 11:00:39 +02001189static int svm_vcpu_reset(struct kvm_vcpu *vcpu)
Avi Kivity04d2cc72007-09-10 18:10:54 +03001190{
1191 struct vcpu_svm *svm = to_svm(vcpu);
1192
Joerg Roedele6101a92008-02-13 18:58:45 +01001193 init_vmcb(svm);
Avi Kivity70433382007-11-07 12:57:23 +02001194
Gleb Natapovc5af89b2009-06-09 15:56:26 +03001195 if (!kvm_vcpu_is_bsp(vcpu)) {
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001196 kvm_rip_write(vcpu, 0);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001197 svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12;
1198 svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8;
Avi Kivity70433382007-11-07 12:57:23 +02001199 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001200 vcpu->arch.regs_avail = ~0;
1201 vcpu->arch.regs_dirty = ~0;
Avi Kivitye00c8cf2007-10-21 11:00:39 +02001202
1203 return 0;
Avi Kivity04d2cc72007-09-10 18:10:54 +03001204}
1205
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001206static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001207{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001208 struct vcpu_svm *svm;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001209 struct page *page;
Joerg Roedelf65c2292008-02-13 18:58:46 +01001210 struct page *msrpm_pages;
Alexander Grafb286d5d2008-11-25 20:17:05 +01001211 struct page *hsave_page;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001212 struct page *nested_msrpm_pages;
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001213 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001214
Rusty Russellc16f8622007-07-30 21:12:19 +10001215 svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001216 if (!svm) {
1217 err = -ENOMEM;
1218 goto out;
1219 }
1220
Joerg Roedelfbc0db72011-03-25 09:44:46 +01001221 svm->tsc_ratio = TSC_RATIO_DEFAULT;
1222
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001223 err = kvm_vcpu_init(&svm->vcpu, kvm, id);
1224 if (err)
1225 goto free_svm;
1226
Joerg Roedelf65c2292008-02-13 18:58:46 +01001227 err = -ENOMEM;
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001228 page = alloc_page(GFP_KERNEL);
1229 if (!page)
1230 goto uninit;
1231
Joerg Roedelf65c2292008-02-13 18:58:46 +01001232 msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
1233 if (!msrpm_pages)
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001234 goto free_page1;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001235
1236 nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
1237 if (!nested_msrpm_pages)
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001238 goto free_page2;
Joerg Roedelf65c2292008-02-13 18:58:46 +01001239
Alexander Grafb286d5d2008-11-25 20:17:05 +01001240 hsave_page = alloc_page(GFP_KERNEL);
1241 if (!hsave_page)
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001242 goto free_page3;
1243
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001244 svm->nested.hsave = page_address(hsave_page);
Alexander Grafb286d5d2008-11-25 20:17:05 +01001245
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001246 svm->msrpm = page_address(msrpm_pages);
1247 svm_vcpu_init_msrpm(svm->msrpm);
1248
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001249 svm->nested.msrpm = page_address(nested_msrpm_pages);
Joerg Roedel323c3d82010-03-01 15:34:37 +01001250 svm_vcpu_init_msrpm(svm->nested.msrpm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001251
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001252 svm->vmcb = page_address(page);
1253 clear_page(svm->vmcb);
1254 svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
1255 svm->asid_generation = 0;
Joerg Roedele6101a92008-02-13 18:58:45 +01001256 init_vmcb(svm);
Zachary Amsden99e3e302010-08-19 22:07:17 -10001257 kvm_write_tsc(&svm->vcpu, 0);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001258
Jan Kiszka10ab25c2010-05-25 16:01:50 +02001259 err = fx_init(&svm->vcpu);
1260 if (err)
1261 goto free_page4;
1262
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001263 svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03001264 if (kvm_vcpu_is_bsp(&svm->vcpu))
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001265 svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001266
Boris Ostrovsky2b036c62012-01-09 14:00:35 -05001267 svm_init_osvw(&svm->vcpu);
1268
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001269 return &svm->vcpu;
Avi Kivity36241b82006-12-22 01:05:20 -08001270
Jan Kiszka10ab25c2010-05-25 16:01:50 +02001271free_page4:
1272 __free_page(hsave_page);
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001273free_page3:
1274 __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
1275free_page2:
1276 __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
1277free_page1:
1278 __free_page(page);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001279uninit:
1280 kvm_vcpu_uninit(&svm->vcpu);
1281free_svm:
Rusty Russella4770342007-08-01 14:46:11 +10001282 kmem_cache_free(kvm_vcpu_cache, svm);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001283out:
1284 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001285}
1286
1287static void svm_free_vcpu(struct kvm_vcpu *vcpu)
1288{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001289 struct vcpu_svm *svm = to_svm(vcpu);
1290
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001291 __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
Joerg Roedelf65c2292008-02-13 18:58:46 +01001292 __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001293 __free_page(virt_to_page(svm->nested.hsave));
1294 __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001295 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10001296 kmem_cache_free(kvm_vcpu_cache, svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001297}
1298
Avi Kivity15ad7142007-07-11 18:17:21 +03001299static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001300{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001301 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03001302 int i;
Avi Kivity0cc50642007-03-25 12:07:27 +02001303
Avi Kivity0cc50642007-03-25 12:07:27 +02001304 if (unlikely(cpu != vcpu->cpu)) {
Marcelo Tosatti4b656b12009-07-21 12:47:45 -03001305 svm->asid_generation = 0;
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01001306 mark_all_dirty(svm->vmcb);
Avi Kivity0cc50642007-03-25 12:07:27 +02001307 }
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001308
Avi Kivity82ca2d12010-10-21 12:20:34 +02001309#ifdef CONFIG_X86_64
1310 rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
1311#endif
Avi Kivitydacccfd2010-10-21 12:20:33 +02001312 savesegment(fs, svm->host.fs);
1313 savesegment(gs, svm->host.gs);
1314 svm->host.ldt = kvm_read_ldt();
1315
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001316 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001317 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
Joerg Roedelfbc0db72011-03-25 09:44:46 +01001318
1319 if (static_cpu_has(X86_FEATURE_TSCRATEMSR) &&
1320 svm->tsc_ratio != __get_cpu_var(current_tsc_ratio)) {
1321 __get_cpu_var(current_tsc_ratio) = svm->tsc_ratio;
1322 wrmsrl(MSR_AMD64_TSC_RATIO, svm->tsc_ratio);
1323 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001324}
1325
1326static void svm_vcpu_put(struct kvm_vcpu *vcpu)
1327{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001328 struct vcpu_svm *svm = to_svm(vcpu);
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001329 int i;
1330
Avi Kivitye1beb1d2007-11-18 13:50:24 +02001331 ++vcpu->stat.host_state_reload;
Avi Kivitydacccfd2010-10-21 12:20:33 +02001332 kvm_load_ldt(svm->host.ldt);
1333#ifdef CONFIG_X86_64
1334 loadsegment(fs, svm->host.fs);
Avi Kivitydacccfd2010-10-21 12:20:33 +02001335 wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
Joerg Roedel893a5ab2011-01-14 16:45:01 +01001336 load_gs_index(svm->host.gs);
Avi Kivitydacccfd2010-10-21 12:20:33 +02001337#else
Avi Kivity831ca602011-03-08 16:09:51 +02001338#ifdef CONFIG_X86_32_LAZY_GS
Avi Kivitydacccfd2010-10-21 12:20:33 +02001339 loadsegment(gs, svm->host.gs);
1340#endif
Avi Kivity831ca602011-03-08 16:09:51 +02001341#endif
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001342 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001343 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001344}
1345
Kevin Wolfea5e97e82012-02-08 14:34:40 +01001346static void svm_update_cpl(struct kvm_vcpu *vcpu)
1347{
1348 struct vcpu_svm *svm = to_svm(vcpu);
1349 int cpl;
1350
1351 if (!is_protmode(vcpu))
1352 cpl = 0;
1353 else if (svm->vmcb->save.rflags & X86_EFLAGS_VM)
1354 cpl = 3;
1355 else
1356 cpl = svm->vmcb->save.cs.selector & 0x3;
1357
1358 svm->vmcb->save.cpl = cpl;
1359}
1360
Avi Kivity6aa8b732006-12-10 02:21:36 -08001361static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
1362{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001363 return to_svm(vcpu)->vmcb->save.rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001364}
1365
1366static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
1367{
Kevin Wolf4cee4792012-02-08 14:34:41 +01001368 unsigned long old_rflags = to_svm(vcpu)->vmcb->save.rflags;
1369
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001370 to_svm(vcpu)->vmcb->save.rflags = rflags;
Kevin Wolf4cee4792012-02-08 14:34:41 +01001371 if ((old_rflags ^ rflags) & X86_EFLAGS_VM)
1372 svm_update_cpl(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001373}
1374
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001375static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
1376{
1377 switch (reg) {
1378 case VCPU_EXREG_PDPTR:
1379 BUG_ON(!npt_enabled);
Avi Kivity9f8fe502010-12-05 17:30:00 +02001380 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001381 break;
1382 default:
1383 BUG();
1384 }
1385}
1386
Alexander Graff0b85052008-11-25 20:17:01 +01001387static void svm_set_vintr(struct vcpu_svm *svm)
1388{
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01001389 set_intercept(svm, INTERCEPT_VINTR);
Alexander Graff0b85052008-11-25 20:17:01 +01001390}
1391
1392static void svm_clear_vintr(struct vcpu_svm *svm)
1393{
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01001394 clr_intercept(svm, INTERCEPT_VINTR);
Alexander Graff0b85052008-11-25 20:17:01 +01001395}
1396
Avi Kivity6aa8b732006-12-10 02:21:36 -08001397static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
1398{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001399 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001400
1401 switch (seg) {
1402 case VCPU_SREG_CS: return &save->cs;
1403 case VCPU_SREG_DS: return &save->ds;
1404 case VCPU_SREG_ES: return &save->es;
1405 case VCPU_SREG_FS: return &save->fs;
1406 case VCPU_SREG_GS: return &save->gs;
1407 case VCPU_SREG_SS: return &save->ss;
1408 case VCPU_SREG_TR: return &save->tr;
1409 case VCPU_SREG_LDTR: return &save->ldtr;
1410 }
1411 BUG();
Al Viro8b6d44c2007-02-09 16:38:40 +00001412 return NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001413}
1414
1415static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1416{
1417 struct vmcb_seg *s = svm_seg(vcpu, seg);
1418
1419 return s->base;
1420}
1421
1422static void svm_get_segment(struct kvm_vcpu *vcpu,
1423 struct kvm_segment *var, int seg)
1424{
1425 struct vmcb_seg *s = svm_seg(vcpu, seg);
1426
1427 var->base = s->base;
1428 var->limit = s->limit;
1429 var->selector = s->selector;
1430 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
1431 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
1432 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
1433 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
1434 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
1435 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
1436 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
1437 var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
Amit Shah25022ac2008-10-27 09:04:17 +00001438
Joerg Roedele0231712010-02-24 18:59:10 +01001439 /*
1440 * AMD's VMCB does not have an explicit unusable field, so emulate it
Andre Przywara19bca6a2009-04-28 12:45:30 +02001441 * for cross vendor migration purposes by "not present"
1442 */
1443 var->unusable = !var->present || (var->type == 0);
1444
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001445 switch (seg) {
1446 case VCPU_SREG_CS:
1447 /*
1448 * SVM always stores 0 for the 'G' bit in the CS selector in
1449 * the VMCB on a VMEXIT. This hurts cross-vendor migration:
1450 * Intel's VMENTRY has a check on the 'G' bit.
1451 */
Amit Shah25022ac2008-10-27 09:04:17 +00001452 var->g = s->limit > 0xfffff;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001453 break;
1454 case VCPU_SREG_TR:
1455 /*
1456 * Work around a bug where the busy flag in the tr selector
1457 * isn't exposed
1458 */
Amit Shahc0d09822008-10-27 09:04:18 +00001459 var->type |= 0x2;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001460 break;
1461 case VCPU_SREG_DS:
1462 case VCPU_SREG_ES:
1463 case VCPU_SREG_FS:
1464 case VCPU_SREG_GS:
1465 /*
1466 * The accessed bit must always be set in the segment
1467 * descriptor cache, although it can be cleared in the
1468 * descriptor, the cached bit always remains at 1. Since
1469 * Intel has a check on this, set it here to support
1470 * cross-vendor migration.
1471 */
1472 if (!var->unusable)
1473 var->type |= 0x1;
1474 break;
Andre Przywarab586eb02009-04-28 12:45:43 +02001475 case VCPU_SREG_SS:
Joerg Roedele0231712010-02-24 18:59:10 +01001476 /*
1477 * On AMD CPUs sometimes the DB bit in the segment
Andre Przywarab586eb02009-04-28 12:45:43 +02001478 * descriptor is left as 1, although the whole segment has
1479 * been made unusable. Clear it here to pass an Intel VMX
1480 * entry check when cross vendor migrating.
1481 */
1482 if (var->unusable)
1483 var->db = 0;
1484 break;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001485 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001486}
1487
Izik Eidus2e4d2652008-03-24 19:38:34 +02001488static int svm_get_cpl(struct kvm_vcpu *vcpu)
1489{
1490 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
1491
1492 return save->cpl;
1493}
1494
Gleb Natapov89a27f42010-02-16 10:51:48 +02001495static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001496{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001497 struct vcpu_svm *svm = to_svm(vcpu);
1498
Gleb Natapov89a27f42010-02-16 10:51:48 +02001499 dt->size = svm->vmcb->save.idtr.limit;
1500 dt->address = svm->vmcb->save.idtr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001501}
1502
Gleb Natapov89a27f42010-02-16 10:51:48 +02001503static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001504{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001505 struct vcpu_svm *svm = to_svm(vcpu);
1506
Gleb Natapov89a27f42010-02-16 10:51:48 +02001507 svm->vmcb->save.idtr.limit = dt->size;
1508 svm->vmcb->save.idtr.base = dt->address ;
Joerg Roedel17a703c2010-12-03 11:45:56 +01001509 mark_dirty(svm->vmcb, VMCB_DT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001510}
1511
Gleb Natapov89a27f42010-02-16 10:51:48 +02001512static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001513{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001514 struct vcpu_svm *svm = to_svm(vcpu);
1515
Gleb Natapov89a27f42010-02-16 10:51:48 +02001516 dt->size = svm->vmcb->save.gdtr.limit;
1517 dt->address = svm->vmcb->save.gdtr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001518}
1519
Gleb Natapov89a27f42010-02-16 10:51:48 +02001520static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001521{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001522 struct vcpu_svm *svm = to_svm(vcpu);
1523
Gleb Natapov89a27f42010-02-16 10:51:48 +02001524 svm->vmcb->save.gdtr.limit = dt->size;
1525 svm->vmcb->save.gdtr.base = dt->address ;
Joerg Roedel17a703c2010-12-03 11:45:56 +01001526 mark_dirty(svm->vmcb, VMCB_DT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001527}
1528
Avi Kivitye8467fd2009-12-29 18:43:06 +02001529static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1530{
1531}
1532
Avi Kivityaff48ba2010-12-05 18:56:11 +02001533static void svm_decache_cr3(struct kvm_vcpu *vcpu)
1534{
1535}
1536
Anthony Liguori25c4c272007-04-27 09:29:21 +03001537static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001538{
1539}
1540
Avi Kivityd2251572010-01-06 10:55:27 +02001541static void update_cr0_intercept(struct vcpu_svm *svm)
1542{
1543 ulong gcr0 = svm->vcpu.arch.cr0;
1544 u64 *hcr0 = &svm->vmcb->save.cr0;
1545
1546 if (!svm->vcpu.fpu_active)
1547 *hcr0 |= SVM_CR0_SELECTIVE_MASK;
1548 else
1549 *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
1550 | (gcr0 & SVM_CR0_SELECTIVE_MASK);
1551
Joerg Roedeldcca1a62010-12-03 11:45:54 +01001552 mark_dirty(svm->vmcb, VMCB_CR);
Avi Kivityd2251572010-01-06 10:55:27 +02001553
1554 if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001555 clr_cr_intercept(svm, INTERCEPT_CR0_READ);
1556 clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
Avi Kivityd2251572010-01-06 10:55:27 +02001557 } else {
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001558 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1559 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
Avi Kivityd2251572010-01-06 10:55:27 +02001560 }
1561}
1562
Avi Kivity6aa8b732006-12-10 02:21:36 -08001563static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1564{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001565 struct vcpu_svm *svm = to_svm(vcpu);
1566
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001567#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02001568 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92fa2007-07-17 23:19:08 +10001569 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
Avi Kivityf6801df2010-01-21 15:31:50 +02001570 vcpu->arch.efer |= EFER_LMA;
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -06001571 svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001572 }
1573
Mike Dayd77c26f2007-10-08 09:02:08 -04001574 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
Avi Kivityf6801df2010-01-21 15:31:50 +02001575 vcpu->arch.efer &= ~EFER_LMA;
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -06001576 svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001577 }
1578 }
1579#endif
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001580 vcpu->arch.cr0 = cr0;
Avi Kivity888f9f3e2010-01-10 12:14:04 +02001581
1582 if (!npt_enabled)
1583 cr0 |= X86_CR0_PG | X86_CR0_WP;
Avi Kivity02daab22009-12-30 12:40:26 +02001584
1585 if (!vcpu->fpu_active)
Joerg Roedel334df502008-01-21 13:09:33 +01001586 cr0 |= X86_CR0_TS;
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001587 /*
1588 * re-enable caching here because the QEMU bios
1589 * does not do it - this results in some delay at
1590 * reboot
1591 */
1592 cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001593 svm->vmcb->save.cr0 = cr0;
Joerg Roedeldcca1a62010-12-03 11:45:54 +01001594 mark_dirty(svm->vmcb, VMCB_CR);
Avi Kivityd2251572010-01-06 10:55:27 +02001595 update_cr0_intercept(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001596}
1597
Nadav Har'El5e1746d2011-05-25 23:03:24 +03001598static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001599{
Joerg Roedel6394b642008-04-09 14:15:29 +02001600 unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE;
Joerg Roedele5eab0c2008-09-09 19:11:51 +02001601 unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
1602
Nadav Har'El5e1746d2011-05-25 23:03:24 +03001603 if (cr4 & X86_CR4_VMXE)
1604 return 1;
1605
Joerg Roedele5eab0c2008-09-09 19:11:51 +02001606 if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
Joerg Roedelf40f6a42010-12-03 15:25:15 +01001607 svm_flush_tlb(vcpu);
Joerg Roedel6394b642008-04-09 14:15:29 +02001608
Joerg Roedelec077262008-04-09 14:15:28 +02001609 vcpu->arch.cr4 = cr4;
1610 if (!npt_enabled)
1611 cr4 |= X86_CR4_PAE;
Joerg Roedel6394b642008-04-09 14:15:29 +02001612 cr4 |= host_cr4_mce;
Joerg Roedelec077262008-04-09 14:15:28 +02001613 to_svm(vcpu)->vmcb->save.cr4 = cr4;
Joerg Roedeldcca1a62010-12-03 11:45:54 +01001614 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
Nadav Har'El5e1746d2011-05-25 23:03:24 +03001615 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001616}
1617
1618static void svm_set_segment(struct kvm_vcpu *vcpu,
1619 struct kvm_segment *var, int seg)
1620{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001621 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001622 struct vmcb_seg *s = svm_seg(vcpu, seg);
1623
1624 s->base = var->base;
1625 s->limit = var->limit;
1626 s->selector = var->selector;
1627 if (var->unusable)
1628 s->attrib = 0;
1629 else {
1630 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
1631 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
1632 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
1633 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
1634 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
1635 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
1636 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
1637 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
1638 }
1639 if (seg == VCPU_SREG_CS)
Kevin Wolfea5e97e82012-02-08 14:34:40 +01001640 svm_update_cpl(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001641
Joerg Roedel060d0c92010-12-03 11:45:57 +01001642 mark_dirty(svm->vmcb, VMCB_SEG);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001643}
1644
Jan Kiszkac8639012012-09-21 05:42:55 +02001645static void update_db_bp_intercept(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001646{
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001647 struct vcpu_svm *svm = to_svm(vcpu);
1648
Joerg Roedel18c918c2010-11-30 18:03:59 +01001649 clr_exception_intercept(svm, DB_VECTOR);
1650 clr_exception_intercept(svm, BP_VECTOR);
Gleb Natapov44c11432009-05-11 13:35:52 +03001651
Jan Kiszka6be7d302009-10-18 13:24:54 +02001652 if (svm->nmi_singlestep)
Joerg Roedel18c918c2010-11-30 18:03:59 +01001653 set_exception_intercept(svm, DB_VECTOR);
Gleb Natapov44c11432009-05-11 13:35:52 +03001654
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001655 if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
1656 if (vcpu->guest_debug &
1657 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
Joerg Roedel18c918c2010-11-30 18:03:59 +01001658 set_exception_intercept(svm, DB_VECTOR);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001659 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
Joerg Roedel18c918c2010-11-30 18:03:59 +01001660 set_exception_intercept(svm, BP_VECTOR);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001661 } else
1662 vcpu->guest_debug = 0;
Gleb Natapov44c11432009-05-11 13:35:52 +03001663}
1664
Tejun Heo0fe1e002009-10-29 22:34:14 +09001665static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001666{
Tejun Heo0fe1e002009-10-29 22:34:14 +09001667 if (sd->next_asid > sd->max_asid) {
1668 ++sd->asid_generation;
1669 sd->next_asid = 1;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001670 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001671 }
1672
Tejun Heo0fe1e002009-10-29 22:34:14 +09001673 svm->asid_generation = sd->asid_generation;
1674 svm->vmcb->control.asid = sd->next_asid++;
Joerg Roedeld48086d2010-12-03 11:45:51 +01001675
1676 mark_dirty(svm->vmcb, VMCB_ASID);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001677}
1678
Gleb Natapov020df072010-04-13 10:05:23 +03001679static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001680{
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001681 struct vcpu_svm *svm = to_svm(vcpu);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001682
Gleb Natapov020df072010-04-13 10:05:23 +03001683 svm->vmcb->save.dr7 = value;
Joerg Roedel72214b92010-12-03 11:45:55 +01001684 mark_dirty(svm->vmcb, VMCB_DR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001685}
1686
Avi Kivity851ba692009-08-24 11:10:17 +03001687static int pf_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001688{
Gleb Natapov631bc482010-10-14 11:22:52 +02001689 u64 fault_address = svm->vmcb->control.exit_info_2;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001690 u32 error_code;
Gleb Natapov631bc482010-10-14 11:22:52 +02001691 int r = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001692
Gleb Natapov631bc482010-10-14 11:22:52 +02001693 switch (svm->apf_reason) {
1694 default:
1695 error_code = svm->vmcb->control.exit_info_1;
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02001696
Gleb Natapov631bc482010-10-14 11:22:52 +02001697 trace_kvm_page_fault(fault_address, error_code);
1698 if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
1699 kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
Andre Przywaradc25e892010-12-21 11:12:07 +01001700 r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
1701 svm->vmcb->control.insn_bytes,
1702 svm->vmcb->control.insn_len);
Gleb Natapov631bc482010-10-14 11:22:52 +02001703 break;
1704 case KVM_PV_REASON_PAGE_NOT_PRESENT:
1705 svm->apf_reason = 0;
1706 local_irq_disable();
1707 kvm_async_pf_task_wait(fault_address);
1708 local_irq_enable();
1709 break;
1710 case KVM_PV_REASON_PAGE_READY:
1711 svm->apf_reason = 0;
1712 local_irq_disable();
1713 kvm_async_pf_task_wake(fault_address);
1714 local_irq_enable();
1715 break;
1716 }
1717 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001718}
1719
Avi Kivity851ba692009-08-24 11:10:17 +03001720static int db_interception(struct vcpu_svm *svm)
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001721{
Avi Kivity851ba692009-08-24 11:10:17 +03001722 struct kvm_run *kvm_run = svm->vcpu.run;
1723
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001724 if (!(svm->vcpu.guest_debug &
Gleb Natapov44c11432009-05-11 13:35:52 +03001725 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
Jan Kiszka6be7d302009-10-18 13:24:54 +02001726 !svm->nmi_singlestep) {
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001727 kvm_queue_exception(&svm->vcpu, DB_VECTOR);
1728 return 1;
1729 }
Gleb Natapov44c11432009-05-11 13:35:52 +03001730
Jan Kiszka6be7d302009-10-18 13:24:54 +02001731 if (svm->nmi_singlestep) {
1732 svm->nmi_singlestep = false;
Gleb Natapov44c11432009-05-11 13:35:52 +03001733 if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP))
1734 svm->vmcb->save.rflags &=
1735 ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
Jan Kiszkac8639012012-09-21 05:42:55 +02001736 update_db_bp_intercept(&svm->vcpu);
Gleb Natapov44c11432009-05-11 13:35:52 +03001737 }
1738
1739 if (svm->vcpu.guest_debug &
Joerg Roedele0231712010-02-24 18:59:10 +01001740 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
Gleb Natapov44c11432009-05-11 13:35:52 +03001741 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1742 kvm_run->debug.arch.pc =
1743 svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1744 kvm_run->debug.arch.exception = DB_VECTOR;
1745 return 0;
1746 }
1747
1748 return 1;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001749}
1750
Avi Kivity851ba692009-08-24 11:10:17 +03001751static int bp_interception(struct vcpu_svm *svm)
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001752{
Avi Kivity851ba692009-08-24 11:10:17 +03001753 struct kvm_run *kvm_run = svm->vcpu.run;
1754
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001755 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1756 kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1757 kvm_run->debug.arch.exception = BP_VECTOR;
1758 return 0;
1759}
1760
Avi Kivity851ba692009-08-24 11:10:17 +03001761static int ud_interception(struct vcpu_svm *svm)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001762{
1763 int er;
1764
Andre Przywara51d8b662010-12-21 11:12:02 +01001765 er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001766 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02001767 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001768 return 1;
1769}
1770
Avi Kivity6b52d182010-01-21 15:31:47 +02001771static void svm_fpu_activate(struct kvm_vcpu *vcpu)
Anthony Liguori7807fa62007-04-23 09:17:21 -05001772{
Avi Kivity6b52d182010-01-21 15:31:47 +02001773 struct vcpu_svm *svm = to_svm(vcpu);
Joerg Roedel66a562f2010-02-19 16:23:08 +01001774
Joerg Roedel18c918c2010-11-30 18:03:59 +01001775 clr_exception_intercept(svm, NM_VECTOR);
Joerg Roedel66a562f2010-02-19 16:23:08 +01001776
Rusty Russelle756fc62007-07-30 20:07:08 +10001777 svm->vcpu.fpu_active = 1;
Avi Kivityd2251572010-01-06 10:55:27 +02001778 update_cr0_intercept(svm);
Avi Kivity6b52d182010-01-21 15:31:47 +02001779}
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001780
Avi Kivity6b52d182010-01-21 15:31:47 +02001781static int nm_interception(struct vcpu_svm *svm)
1782{
1783 svm_fpu_activate(&svm->vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001784 return 1;
Anthony Liguori7807fa62007-04-23 09:17:21 -05001785}
1786
Joerg Roedel67ec6602010-05-17 14:43:35 +02001787static bool is_erratum_383(void)
1788{
1789 int err, i;
1790 u64 value;
1791
1792 if (!erratum_383_found)
1793 return false;
1794
1795 value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
1796 if (err)
1797 return false;
1798
1799 /* Bit 62 may or may not be set for this mce */
1800 value &= ~(1ULL << 62);
1801
1802 if (value != 0xb600000000010015ULL)
1803 return false;
1804
1805 /* Clear MCi_STATUS registers */
1806 for (i = 0; i < 6; ++i)
1807 native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);
1808
1809 value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
1810 if (!err) {
1811 u32 low, high;
1812
1813 value &= ~(1ULL << 2);
1814 low = lower_32_bits(value);
1815 high = upper_32_bits(value);
1816
1817 native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
1818 }
1819
1820 /* Flush tlb to evict multi-match entries */
1821 __flush_tlb_all();
1822
1823 return true;
1824}
1825
Joerg Roedelfe5913e2010-05-17 14:43:34 +02001826static void svm_handle_mce(struct vcpu_svm *svm)
Joerg Roedel53371b52008-04-09 14:15:30 +02001827{
Joerg Roedel67ec6602010-05-17 14:43:35 +02001828 if (is_erratum_383()) {
1829 /*
1830 * Erratum 383 triggered. Guest state is corrupt so kill the
1831 * guest.
1832 */
1833 pr_err("KVM: Guest triggered AMD Erratum 383\n");
1834
Avi Kivitya8eeb042010-05-10 12:34:53 +03001835 kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
Joerg Roedel67ec6602010-05-17 14:43:35 +02001836
1837 return;
1838 }
1839
Joerg Roedel53371b52008-04-09 14:15:30 +02001840 /*
1841 * On an #MC intercept the MCE handler is not called automatically in
1842 * the host. So do it by hand here.
1843 */
1844 asm volatile (
1845 "int $0x12\n");
1846 /* not sure if we ever come back to this point */
1847
Joerg Roedelfe5913e2010-05-17 14:43:34 +02001848 return;
1849}
1850
1851static int mc_interception(struct vcpu_svm *svm)
1852{
Joerg Roedel53371b52008-04-09 14:15:30 +02001853 return 1;
1854}
1855
Avi Kivity851ba692009-08-24 11:10:17 +03001856static int shutdown_interception(struct vcpu_svm *svm)
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001857{
Avi Kivity851ba692009-08-24 11:10:17 +03001858 struct kvm_run *kvm_run = svm->vcpu.run;
1859
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001860 /*
1861 * VMCB is undefined after a SHUTDOWN intercept
1862 * so reinitialize it.
1863 */
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001864 clear_page(svm->vmcb);
Joerg Roedele6101a92008-02-13 18:58:45 +01001865 init_vmcb(svm);
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001866
1867 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
1868 return 0;
1869}
1870
Avi Kivity851ba692009-08-24 11:10:17 +03001871static int io_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001872{
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001873 struct kvm_vcpu *vcpu = &svm->vcpu;
Mike Dayd77c26f2007-10-08 09:02:08 -04001874 u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
Jan Kiszka34c33d12009-02-08 13:28:15 +01001875 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02001876 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001877
Rusty Russelle756fc62007-07-30 20:07:08 +10001878 ++svm->vcpu.stat.io_exits;
Laurent Viviere70669a2007-08-05 10:36:40 +03001879 string = (io_info & SVM_IOIO_STR_MASK) != 0;
Avi Kivity039576c2007-03-20 12:46:50 +02001880 in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001881 if (string || in)
Andre Przywara51d8b662010-12-21 11:12:02 +01001882 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001883
Avi Kivity039576c2007-03-20 12:46:50 +02001884 port = io_info >> 16;
1885 size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001886 svm->next_rip = svm->vmcb->control.exit_info_2;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01001887 skip_emulated_instruction(&svm->vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001888
1889 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001890}
1891
Avi Kivity851ba692009-08-24 11:10:17 +03001892static int nmi_interception(struct vcpu_svm *svm)
Joerg Roedelc47f0982008-04-30 17:56:00 +02001893{
1894 return 1;
1895}
1896
Avi Kivity851ba692009-08-24 11:10:17 +03001897static int intr_interception(struct vcpu_svm *svm)
Joerg Roedela0698052008-04-30 17:56:01 +02001898{
1899 ++svm->vcpu.stat.irq_exits;
1900 return 1;
1901}
1902
Avi Kivity851ba692009-08-24 11:10:17 +03001903static int nop_on_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001904{
1905 return 1;
1906}
1907
Avi Kivity851ba692009-08-24 11:10:17 +03001908static int halt_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001909{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001910 svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
Rusty Russelle756fc62007-07-30 20:07:08 +10001911 skip_emulated_instruction(&svm->vcpu);
1912 return kvm_emulate_halt(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001913}
1914
Avi Kivity851ba692009-08-24 11:10:17 +03001915static int vmmcall_interception(struct vcpu_svm *svm)
Avi Kivity02e235b2007-02-19 14:37:47 +02001916{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001917 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
Rusty Russelle756fc62007-07-30 20:07:08 +10001918 skip_emulated_instruction(&svm->vcpu);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001919 kvm_emulate_hypercall(&svm->vcpu);
1920 return 1;
Avi Kivity02e235b2007-02-19 14:37:47 +02001921}
1922
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001923static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
1924{
1925 struct vcpu_svm *svm = to_svm(vcpu);
1926
1927 return svm->nested.nested_cr3;
1928}
1929
Avi Kivitye4e517b2011-07-28 11:36:17 +03001930static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
1931{
1932 struct vcpu_svm *svm = to_svm(vcpu);
1933 u64 cr3 = svm->nested.nested_cr3;
1934 u64 pdpte;
1935 int ret;
1936
1937 ret = kvm_read_guest_page(vcpu->kvm, gpa_to_gfn(cr3), &pdpte,
1938 offset_in_page(cr3) + index * 8, 8);
1939 if (ret)
1940 return 0;
1941 return pdpte;
1942}
1943
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001944static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
1945 unsigned long root)
1946{
1947 struct vcpu_svm *svm = to_svm(vcpu);
1948
1949 svm->vmcb->control.nested_cr3 = root;
Joerg Roedelb2747162010-12-03 11:45:53 +01001950 mark_dirty(svm->vmcb, VMCB_NPT);
Joerg Roedelf40f6a42010-12-03 15:25:15 +01001951 svm_flush_tlb(vcpu);
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001952}
1953
Avi Kivity6389ee92010-11-29 16:12:30 +02001954static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
1955 struct x86_exception *fault)
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001956{
1957 struct vcpu_svm *svm = to_svm(vcpu);
1958
1959 svm->vmcb->control.exit_code = SVM_EXIT_NPF;
1960 svm->vmcb->control.exit_code_hi = 0;
Avi Kivity6389ee92010-11-29 16:12:30 +02001961 svm->vmcb->control.exit_info_1 = fault->error_code;
1962 svm->vmcb->control.exit_info_2 = fault->address;
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001963
1964 nested_svm_vmexit(svm);
1965}
1966
Joerg Roedel4b161842010-09-10 17:31:03 +02001967static int nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
1968{
1969 int r;
1970
1971 r = kvm_init_shadow_mmu(vcpu, &vcpu->arch.mmu);
1972
1973 vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3;
1974 vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3;
Avi Kivitye4e517b2011-07-28 11:36:17 +03001975 vcpu->arch.mmu.get_pdptr = nested_svm_get_tdp_pdptr;
Joerg Roedel4b161842010-09-10 17:31:03 +02001976 vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
1977 vcpu->arch.mmu.shadow_root_level = get_npt_level();
1978 vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
1979
1980 return r;
1981}
1982
1983static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
1984{
1985 vcpu->arch.walk_mmu = &vcpu->arch.mmu;
1986}
1987
Alexander Grafc0725422008-11-25 20:17:03 +01001988static int nested_svm_check_permissions(struct vcpu_svm *svm)
1989{
Avi Kivityf6801df2010-01-21 15:31:50 +02001990 if (!(svm->vcpu.arch.efer & EFER_SVME)
Alexander Grafc0725422008-11-25 20:17:03 +01001991 || !is_paging(&svm->vcpu)) {
1992 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
1993 return 1;
1994 }
1995
1996 if (svm->vmcb->save.cpl) {
1997 kvm_inject_gp(&svm->vcpu, 0);
1998 return 1;
1999 }
2000
2001 return 0;
2002}
2003
Alexander Grafcf74a782008-11-25 20:17:08 +01002004static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
2005 bool has_error_code, u32 error_code)
2006{
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002007 int vmexit;
2008
Joerg Roedel20307532010-11-29 17:51:48 +01002009 if (!is_guest_mode(&svm->vcpu))
Joerg Roedel0295ad72009-08-07 11:49:37 +02002010 return 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01002011
Joerg Roedel0295ad72009-08-07 11:49:37 +02002012 svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
2013 svm->vmcb->control.exit_code_hi = 0;
2014 svm->vmcb->control.exit_info_1 = error_code;
2015 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
2016
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002017 vmexit = nested_svm_intercept(svm);
2018 if (vmexit == NESTED_EXIT_DONE)
2019 svm->nested.exit_required = true;
2020
2021 return vmexit;
Alexander Grafcf74a782008-11-25 20:17:08 +01002022}
2023
Joerg Roedel8fe54652010-02-19 16:23:01 +01002024/* This function returns true if it is save to enable the irq window */
2025static inline bool nested_svm_intr(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002026{
Joerg Roedel20307532010-11-29 17:51:48 +01002027 if (!is_guest_mode(&svm->vcpu))
Joerg Roedel8fe54652010-02-19 16:23:01 +01002028 return true;
Alexander Grafcf74a782008-11-25 20:17:08 +01002029
Joerg Roedel26666952009-08-07 11:49:46 +02002030 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
Joerg Roedel8fe54652010-02-19 16:23:01 +01002031 return true;
Alexander Grafcf74a782008-11-25 20:17:08 +01002032
Joerg Roedel26666952009-08-07 11:49:46 +02002033 if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
Joerg Roedel8fe54652010-02-19 16:23:01 +01002034 return false;
Alexander Grafcf74a782008-11-25 20:17:08 +01002035
Gleb Natapova0a07cd2010-09-20 10:15:32 +02002036 /*
2037 * if vmexit was already requested (by intercepted exception
2038 * for instance) do not overwrite it with "external interrupt"
2039 * vmexit.
2040 */
2041 if (svm->nested.exit_required)
2042 return false;
2043
Joerg Roedel197717d2010-02-24 18:59:19 +01002044 svm->vmcb->control.exit_code = SVM_EXIT_INTR;
2045 svm->vmcb->control.exit_info_1 = 0;
2046 svm->vmcb->control.exit_info_2 = 0;
Joerg Roedel26666952009-08-07 11:49:46 +02002047
Joerg Roedelcd3ff652009-10-09 16:08:26 +02002048 if (svm->nested.intercept & 1ULL) {
2049 /*
2050 * The #vmexit can't be emulated here directly because this
Guo Chaoc5ec2e52012-06-28 15:16:43 +08002051 * code path runs with irqs and preemption disabled. A
Joerg Roedelcd3ff652009-10-09 16:08:26 +02002052 * #vmexit emulation might sleep. Only signal request for
2053 * the #vmexit here.
2054 */
2055 svm->nested.exit_required = true;
Joerg Roedel236649d2009-10-09 16:08:30 +02002056 trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
Joerg Roedel8fe54652010-02-19 16:23:01 +01002057 return false;
Alexander Grafcf74a782008-11-25 20:17:08 +01002058 }
2059
Joerg Roedel8fe54652010-02-19 16:23:01 +01002060 return true;
Alexander Grafcf74a782008-11-25 20:17:08 +01002061}
2062
Joerg Roedel887f5002010-02-24 18:59:12 +01002063/* This function returns true if it is save to enable the nmi window */
2064static inline bool nested_svm_nmi(struct vcpu_svm *svm)
2065{
Joerg Roedel20307532010-11-29 17:51:48 +01002066 if (!is_guest_mode(&svm->vcpu))
Joerg Roedel887f5002010-02-24 18:59:12 +01002067 return true;
2068
2069 if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
2070 return true;
2071
2072 svm->vmcb->control.exit_code = SVM_EXIT_NMI;
2073 svm->nested.exit_required = true;
2074
2075 return false;
2076}
2077
Joerg Roedel7597f122010-02-19 16:23:00 +01002078static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002079{
2080 struct page *page;
2081
Joerg Roedel6c3bd3d2010-02-19 16:23:04 +01002082 might_sleep();
2083
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002084 page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT);
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002085 if (is_error_page(page))
2086 goto error;
2087
Joerg Roedel7597f122010-02-19 16:23:00 +01002088 *_page = page;
2089
2090 return kmap(page);
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002091
2092error:
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002093 kvm_inject_gp(&svm->vcpu, 0);
2094
2095 return NULL;
2096}
2097
Joerg Roedel7597f122010-02-19 16:23:00 +01002098static void nested_svm_unmap(struct page *page)
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002099{
Joerg Roedel7597f122010-02-19 16:23:00 +01002100 kunmap(page);
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002101 kvm_release_page_dirty(page);
2102}
2103
Joerg Roedelce2ac082010-03-01 15:34:39 +01002104static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002105{
Joerg Roedelce2ac082010-03-01 15:34:39 +01002106 unsigned port;
2107 u8 val, bit;
2108 u64 gpa;
2109
2110 if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
2111 return NESTED_EXIT_HOST;
2112
2113 port = svm->vmcb->control.exit_info_1 >> 16;
2114 gpa = svm->nested.vmcb_iopm + (port / 8);
2115 bit = port % 8;
2116 val = 0;
2117
2118 if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, 1))
2119 val &= (1 << bit);
2120
2121 return val ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
2122}
2123
Joerg Roedeld2477822010-03-01 15:34:34 +01002124static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002125{
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002126 u32 offset, msr, value;
2127 int write, mask;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002128
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002129 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
Joerg Roedeld2477822010-03-01 15:34:34 +01002130 return NESTED_EXIT_HOST;
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002131
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002132 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
2133 offset = svm_msrpm_offset(msr);
2134 write = svm->vmcb->control.exit_info_1 & 1;
2135 mask = 1 << ((2 * (msr & 0xf)) + write);
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002136
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002137 if (offset == MSR_INVALID)
2138 return NESTED_EXIT_DONE;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002139
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002140 /* Offset is in 32 bit units but need in 8 bit units */
2141 offset *= 4;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002142
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002143 if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4))
2144 return NESTED_EXIT_DONE;
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002145
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002146 return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002147}
2148
Joerg Roedel410e4d52009-08-07 11:49:44 +02002149static int nested_svm_exit_special(struct vcpu_svm *svm)
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002150{
Alexander Grafcf74a782008-11-25 20:17:08 +01002151 u32 exit_code = svm->vmcb->control.exit_code;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002152
Joerg Roedel410e4d52009-08-07 11:49:44 +02002153 switch (exit_code) {
2154 case SVM_EXIT_INTR:
2155 case SVM_EXIT_NMI:
Joerg Roedelff47a492010-04-22 12:33:14 +02002156 case SVM_EXIT_EXCP_BASE + MC_VECTOR:
Joerg Roedel410e4d52009-08-07 11:49:44 +02002157 return NESTED_EXIT_HOST;
Joerg Roedel410e4d52009-08-07 11:49:44 +02002158 case SVM_EXIT_NPF:
Joerg Roedele0231712010-02-24 18:59:10 +01002159 /* For now we are always handling NPFs when using them */
Joerg Roedel410e4d52009-08-07 11:49:44 +02002160 if (npt_enabled)
2161 return NESTED_EXIT_HOST;
2162 break;
Joerg Roedel410e4d52009-08-07 11:49:44 +02002163 case SVM_EXIT_EXCP_BASE + PF_VECTOR:
Gleb Natapov631bc482010-10-14 11:22:52 +02002164 /* When we're shadowing, trap PFs, but not async PF */
2165 if (!npt_enabled && svm->apf_reason == 0)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002166 return NESTED_EXIT_HOST;
2167 break;
Joerg Roedel66a562f2010-02-19 16:23:08 +01002168 case SVM_EXIT_EXCP_BASE + NM_VECTOR:
2169 nm_interception(svm);
2170 break;
Joerg Roedel410e4d52009-08-07 11:49:44 +02002171 default:
2172 break;
Alexander Grafcf74a782008-11-25 20:17:08 +01002173 }
2174
Joerg Roedel410e4d52009-08-07 11:49:44 +02002175 return NESTED_EXIT_CONTINUE;
2176}
2177
2178/*
2179 * If this function returns true, this #vmexit was already handled
2180 */
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002181static int nested_svm_intercept(struct vcpu_svm *svm)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002182{
2183 u32 exit_code = svm->vmcb->control.exit_code;
2184 int vmexit = NESTED_EXIT_HOST;
2185
Alexander Grafcf74a782008-11-25 20:17:08 +01002186 switch (exit_code) {
Joerg Roedel9c4e40b992009-08-07 11:49:36 +02002187 case SVM_EXIT_MSR:
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002188 vmexit = nested_svm_exit_handled_msr(svm);
Joerg Roedel9c4e40b992009-08-07 11:49:36 +02002189 break;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002190 case SVM_EXIT_IOIO:
2191 vmexit = nested_svm_intercept_ioio(svm);
2192 break;
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002193 case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
2194 u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
2195 if (svm->nested.intercept_cr & bit)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002196 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002197 break;
2198 }
Joerg Roedel3aed0412010-11-30 18:03:58 +01002199 case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
2200 u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
2201 if (svm->nested.intercept_dr & bit)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002202 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002203 break;
2204 }
2205 case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
2206 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
Joerg Roedelaad42c62009-08-07 11:49:34 +02002207 if (svm->nested.intercept_exceptions & excp_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002208 vmexit = NESTED_EXIT_DONE;
Gleb Natapov631bc482010-10-14 11:22:52 +02002209 /* async page fault always cause vmexit */
2210 else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
2211 svm->apf_reason != 0)
2212 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002213 break;
2214 }
Joerg Roedel228070b2010-04-22 12:33:10 +02002215 case SVM_EXIT_ERR: {
2216 vmexit = NESTED_EXIT_DONE;
2217 break;
2218 }
Alexander Grafcf74a782008-11-25 20:17:08 +01002219 default: {
2220 u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
Joerg Roedelaad42c62009-08-07 11:49:34 +02002221 if (svm->nested.intercept & exit_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002222 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002223 }
2224 }
2225
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002226 return vmexit;
2227}
2228
2229static int nested_svm_exit_handled(struct vcpu_svm *svm)
2230{
2231 int vmexit;
2232
2233 vmexit = nested_svm_intercept(svm);
2234
2235 if (vmexit == NESTED_EXIT_DONE)
Joerg Roedel9c4e40b992009-08-07 11:49:36 +02002236 nested_svm_vmexit(svm);
Joerg Roedel9c4e40b992009-08-07 11:49:36 +02002237
2238 return vmexit;
Alexander Grafcf74a782008-11-25 20:17:08 +01002239}
2240
Joerg Roedel0460a972009-08-07 11:49:31 +02002241static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
2242{
2243 struct vmcb_control_area *dst = &dst_vmcb->control;
2244 struct vmcb_control_area *from = &from_vmcb->control;
2245
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002246 dst->intercept_cr = from->intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +01002247 dst->intercept_dr = from->intercept_dr;
Joerg Roedel0460a972009-08-07 11:49:31 +02002248 dst->intercept_exceptions = from->intercept_exceptions;
2249 dst->intercept = from->intercept;
2250 dst->iopm_base_pa = from->iopm_base_pa;
2251 dst->msrpm_base_pa = from->msrpm_base_pa;
2252 dst->tsc_offset = from->tsc_offset;
2253 dst->asid = from->asid;
2254 dst->tlb_ctl = from->tlb_ctl;
2255 dst->int_ctl = from->int_ctl;
2256 dst->int_vector = from->int_vector;
2257 dst->int_state = from->int_state;
2258 dst->exit_code = from->exit_code;
2259 dst->exit_code_hi = from->exit_code_hi;
2260 dst->exit_info_1 = from->exit_info_1;
2261 dst->exit_info_2 = from->exit_info_2;
2262 dst->exit_int_info = from->exit_int_info;
2263 dst->exit_int_info_err = from->exit_int_info_err;
2264 dst->nested_ctl = from->nested_ctl;
2265 dst->event_inj = from->event_inj;
2266 dst->event_inj_err = from->event_inj_err;
2267 dst->nested_cr3 = from->nested_cr3;
2268 dst->lbr_ctl = from->lbr_ctl;
2269}
2270
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002271static int nested_svm_vmexit(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002272{
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002273 struct vmcb *nested_vmcb;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002274 struct vmcb *hsave = svm->nested.hsave;
Joerg Roedel33740e42009-08-07 11:49:29 +02002275 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002276 struct page *page;
Alexander Grafcf74a782008-11-25 20:17:08 +01002277
Joerg Roedel17897f32009-10-09 16:08:29 +02002278 trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
2279 vmcb->control.exit_info_1,
2280 vmcb->control.exit_info_2,
2281 vmcb->control.exit_int_info,
Stefan Hajnoczie097e5f2011-07-22 12:46:52 +01002282 vmcb->control.exit_int_info_err,
2283 KVM_ISA_SVM);
Joerg Roedel17897f32009-10-09 16:08:29 +02002284
Joerg Roedel7597f122010-02-19 16:23:00 +01002285 nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
Joerg Roedel34f80cfa2009-08-07 11:49:38 +02002286 if (!nested_vmcb)
2287 return 1;
2288
Joerg Roedel20307532010-11-29 17:51:48 +01002289 /* Exit Guest-Mode */
2290 leave_guest_mode(&svm->vcpu);
Joerg Roedel06fc77722010-02-19 16:23:07 +01002291 svm->nested.vmcb = 0;
2292
Alexander Grafcf74a782008-11-25 20:17:08 +01002293 /* Give the current vmcb to the guest */
Joerg Roedel33740e42009-08-07 11:49:29 +02002294 disable_gif(svm);
2295
2296 nested_vmcb->save.es = vmcb->save.es;
2297 nested_vmcb->save.cs = vmcb->save.cs;
2298 nested_vmcb->save.ss = vmcb->save.ss;
2299 nested_vmcb->save.ds = vmcb->save.ds;
2300 nested_vmcb->save.gdtr = vmcb->save.gdtr;
2301 nested_vmcb->save.idtr = vmcb->save.idtr;
Joerg Roedel3f6a9d12010-07-27 18:14:20 +02002302 nested_vmcb->save.efer = svm->vcpu.arch.efer;
Joerg Roedelcdbbdc12010-02-19 16:23:03 +01002303 nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
Avi Kivity9f8fe502010-12-05 17:30:00 +02002304 nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu);
Joerg Roedel33740e42009-08-07 11:49:29 +02002305 nested_vmcb->save.cr2 = vmcb->save.cr2;
Joerg Roedelcdbbdc12010-02-19 16:23:03 +01002306 nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
Avi Kivityf6e78472010-08-02 15:30:20 +03002307 nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
Joerg Roedel33740e42009-08-07 11:49:29 +02002308 nested_vmcb->save.rip = vmcb->save.rip;
2309 nested_vmcb->save.rsp = vmcb->save.rsp;
2310 nested_vmcb->save.rax = vmcb->save.rax;
2311 nested_vmcb->save.dr7 = vmcb->save.dr7;
2312 nested_vmcb->save.dr6 = vmcb->save.dr6;
2313 nested_vmcb->save.cpl = vmcb->save.cpl;
2314
2315 nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
2316 nested_vmcb->control.int_vector = vmcb->control.int_vector;
2317 nested_vmcb->control.int_state = vmcb->control.int_state;
2318 nested_vmcb->control.exit_code = vmcb->control.exit_code;
2319 nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
2320 nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
2321 nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
2322 nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
2323 nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
Joerg Roedel7a190662010-07-27 18:14:21 +02002324 nested_vmcb->control.next_rip = vmcb->control.next_rip;
Alexander Graf8d23c462009-10-09 16:08:25 +02002325
2326 /*
2327 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
2328 * to make sure that we do not lose injected events. So check event_inj
2329 * here and copy it to exit_int_info if it is valid.
2330 * Exit_int_info and event_inj can't be both valid because the case
2331 * below only happens on a VMRUN instruction intercept which has
2332 * no valid exit_int_info set.
2333 */
2334 if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
2335 struct vmcb_control_area *nc = &nested_vmcb->control;
2336
2337 nc->exit_int_info = vmcb->control.event_inj;
2338 nc->exit_int_info_err = vmcb->control.event_inj_err;
2339 }
2340
Joerg Roedel33740e42009-08-07 11:49:29 +02002341 nested_vmcb->control.tlb_ctl = 0;
2342 nested_vmcb->control.event_inj = 0;
2343 nested_vmcb->control.event_inj_err = 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01002344
2345 /* We always set V_INTR_MASKING and remember the old value in hflags */
2346 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
2347 nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
2348
Alexander Grafcf74a782008-11-25 20:17:08 +01002349 /* Restore the original control entries */
Joerg Roedel0460a972009-08-07 11:49:31 +02002350 copy_vmcb_control_area(vmcb, hsave);
Alexander Grafcf74a782008-11-25 20:17:08 +01002351
Alexander Graf219b65d2009-06-15 15:21:25 +02002352 kvm_clear_exception_queue(&svm->vcpu);
2353 kvm_clear_interrupt_queue(&svm->vcpu);
Alexander Grafcf74a782008-11-25 20:17:08 +01002354
Joerg Roedel4b161842010-09-10 17:31:03 +02002355 svm->nested.nested_cr3 = 0;
2356
Alexander Grafcf74a782008-11-25 20:17:08 +01002357 /* Restore selected save entries */
2358 svm->vmcb->save.es = hsave->save.es;
2359 svm->vmcb->save.cs = hsave->save.cs;
2360 svm->vmcb->save.ss = hsave->save.ss;
2361 svm->vmcb->save.ds = hsave->save.ds;
2362 svm->vmcb->save.gdtr = hsave->save.gdtr;
2363 svm->vmcb->save.idtr = hsave->save.idtr;
Avi Kivityf6e78472010-08-02 15:30:20 +03002364 kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
Alexander Grafcf74a782008-11-25 20:17:08 +01002365 svm_set_efer(&svm->vcpu, hsave->save.efer);
2366 svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
2367 svm_set_cr4(&svm->vcpu, hsave->save.cr4);
2368 if (npt_enabled) {
2369 svm->vmcb->save.cr3 = hsave->save.cr3;
2370 svm->vcpu.arch.cr3 = hsave->save.cr3;
2371 } else {
Avi Kivity23902182010-06-10 17:02:16 +03002372 (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
Alexander Grafcf74a782008-11-25 20:17:08 +01002373 }
2374 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
2375 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
2376 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
2377 svm->vmcb->save.dr7 = 0;
2378 svm->vmcb->save.cpl = 0;
2379 svm->vmcb->control.exit_int_info = 0;
2380
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01002381 mark_all_dirty(svm->vmcb);
2382
Joerg Roedel7597f122010-02-19 16:23:00 +01002383 nested_svm_unmap(page);
Alexander Grafcf74a782008-11-25 20:17:08 +01002384
Joerg Roedel4b161842010-09-10 17:31:03 +02002385 nested_svm_uninit_mmu_context(&svm->vcpu);
Alexander Grafcf74a782008-11-25 20:17:08 +01002386 kvm_mmu_reset_context(&svm->vcpu);
2387 kvm_mmu_load(&svm->vcpu);
2388
2389 return 0;
2390}
Alexander Graf3d6368e2008-11-25 20:17:07 +01002391
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002392static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002393{
Joerg Roedel323c3d82010-03-01 15:34:37 +01002394 /*
2395 * This function merges the msr permission bitmaps of kvm and the
Guo Chaoc5ec2e52012-06-28 15:16:43 +08002396 * nested vmcb. It is optimized in that it only merges the parts where
Joerg Roedel323c3d82010-03-01 15:34:37 +01002397 * the kvm msr permission bitmap may contain zero bits
2398 */
Alexander Graf3d6368e2008-11-25 20:17:07 +01002399 int i;
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002400
Joerg Roedel323c3d82010-03-01 15:34:37 +01002401 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
2402 return true;
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002403
Joerg Roedel323c3d82010-03-01 15:34:37 +01002404 for (i = 0; i < MSRPM_OFFSETS; i++) {
2405 u32 value, p;
2406 u64 offset;
2407
2408 if (msrpm_offsets[i] == 0xffffffff)
2409 break;
2410
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002411 p = msrpm_offsets[i];
2412 offset = svm->nested.vmcb_msrpm + (p * 4);
Joerg Roedel323c3d82010-03-01 15:34:37 +01002413
2414 if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4))
2415 return false;
2416
2417 svm->nested.msrpm[p] = svm->msrpm[p] | value;
2418 }
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002419
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002420 svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002421
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002422 return true;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002423}
2424
Joerg Roedel52c65a302010-08-02 16:46:44 +02002425static bool nested_vmcb_checks(struct vmcb *vmcb)
2426{
2427 if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
2428 return false;
2429
Joerg Roedeldbe77582010-08-02 16:46:45 +02002430 if (vmcb->control.asid == 0)
2431 return false;
2432
Joerg Roedel4b161842010-09-10 17:31:03 +02002433 if (vmcb->control.nested_ctl && !npt_enabled)
2434 return false;
2435
Joerg Roedel52c65a302010-08-02 16:46:44 +02002436 return true;
2437}
2438
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002439static bool nested_svm_vmrun(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002440{
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002441 struct vmcb *nested_vmcb;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002442 struct vmcb *hsave = svm->nested.hsave;
Joerg Roedeldefbba52009-08-07 11:49:30 +02002443 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002444 struct page *page;
Joerg Roedel06fc77722010-02-19 16:23:07 +01002445 u64 vmcb_gpa;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002446
Joerg Roedel06fc77722010-02-19 16:23:07 +01002447 vmcb_gpa = svm->vmcb->save.rax;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002448
Joerg Roedel7597f122010-02-19 16:23:00 +01002449 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002450 if (!nested_vmcb)
2451 return false;
2452
Joerg Roedel52c65a302010-08-02 16:46:44 +02002453 if (!nested_vmcb_checks(nested_vmcb)) {
2454 nested_vmcb->control.exit_code = SVM_EXIT_ERR;
2455 nested_vmcb->control.exit_code_hi = 0;
2456 nested_vmcb->control.exit_info_1 = 0;
2457 nested_vmcb->control.exit_info_2 = 0;
2458
2459 nested_svm_unmap(page);
2460
2461 return false;
2462 }
2463
Roedel, Joergb75f4eb2010-09-03 14:21:40 +02002464 trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
Joerg Roedel0ac406d2009-10-09 16:08:27 +02002465 nested_vmcb->save.rip,
2466 nested_vmcb->control.int_ctl,
2467 nested_vmcb->control.event_inj,
2468 nested_vmcb->control.nested_ctl);
2469
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002470 trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
2471 nested_vmcb->control.intercept_cr >> 16,
Joerg Roedel2e554e82010-02-24 18:59:14 +01002472 nested_vmcb->control.intercept_exceptions,
2473 nested_vmcb->control.intercept);
2474
Alexander Graf3d6368e2008-11-25 20:17:07 +01002475 /* Clear internal status */
Alexander Graf219b65d2009-06-15 15:21:25 +02002476 kvm_clear_exception_queue(&svm->vcpu);
2477 kvm_clear_interrupt_queue(&svm->vcpu);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002478
Joerg Roedele0231712010-02-24 18:59:10 +01002479 /*
2480 * Save the old vmcb, so we don't need to pick what we save, but can
2481 * restore everything when a VMEXIT occurs
2482 */
Joerg Roedeldefbba52009-08-07 11:49:30 +02002483 hsave->save.es = vmcb->save.es;
2484 hsave->save.cs = vmcb->save.cs;
2485 hsave->save.ss = vmcb->save.ss;
2486 hsave->save.ds = vmcb->save.ds;
2487 hsave->save.gdtr = vmcb->save.gdtr;
2488 hsave->save.idtr = vmcb->save.idtr;
Avi Kivityf6801df2010-01-21 15:31:50 +02002489 hsave->save.efer = svm->vcpu.arch.efer;
Avi Kivity4d4ec082009-12-29 18:07:30 +02002490 hsave->save.cr0 = kvm_read_cr0(&svm->vcpu);
Joerg Roedeldefbba52009-08-07 11:49:30 +02002491 hsave->save.cr4 = svm->vcpu.arch.cr4;
Avi Kivityf6e78472010-08-02 15:30:20 +03002492 hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
Roedel, Joergb75f4eb2010-09-03 14:21:40 +02002493 hsave->save.rip = kvm_rip_read(&svm->vcpu);
Joerg Roedeldefbba52009-08-07 11:49:30 +02002494 hsave->save.rsp = vmcb->save.rsp;
2495 hsave->save.rax = vmcb->save.rax;
2496 if (npt_enabled)
2497 hsave->save.cr3 = vmcb->save.cr3;
2498 else
Avi Kivity9f8fe502010-12-05 17:30:00 +02002499 hsave->save.cr3 = kvm_read_cr3(&svm->vcpu);
Joerg Roedeldefbba52009-08-07 11:49:30 +02002500
Joerg Roedel0460a972009-08-07 11:49:31 +02002501 copy_vmcb_control_area(hsave, vmcb);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002502
Avi Kivityf6e78472010-08-02 15:30:20 +03002503 if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002504 svm->vcpu.arch.hflags |= HF_HIF_MASK;
2505 else
2506 svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
2507
Joerg Roedel4b161842010-09-10 17:31:03 +02002508 if (nested_vmcb->control.nested_ctl) {
2509 kvm_mmu_unload(&svm->vcpu);
2510 svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
2511 nested_svm_init_mmu_context(&svm->vcpu);
2512 }
2513
Alexander Graf3d6368e2008-11-25 20:17:07 +01002514 /* Load the nested guest state */
2515 svm->vmcb->save.es = nested_vmcb->save.es;
2516 svm->vmcb->save.cs = nested_vmcb->save.cs;
2517 svm->vmcb->save.ss = nested_vmcb->save.ss;
2518 svm->vmcb->save.ds = nested_vmcb->save.ds;
2519 svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
2520 svm->vmcb->save.idtr = nested_vmcb->save.idtr;
Avi Kivityf6e78472010-08-02 15:30:20 +03002521 kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002522 svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
2523 svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
2524 svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
2525 if (npt_enabled) {
2526 svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
2527 svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
Joerg Roedel0e5cbe32010-02-24 18:59:11 +01002528 } else
Avi Kivity23902182010-06-10 17:02:16 +03002529 (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
Joerg Roedel0e5cbe32010-02-24 18:59:11 +01002530
2531 /* Guest paging mode is active - reset mmu */
2532 kvm_mmu_reset_context(&svm->vcpu);
2533
Joerg Roedeldefbba52009-08-07 11:49:30 +02002534 svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002535 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
2536 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
2537 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
Joerg Roedele0231712010-02-24 18:59:10 +01002538
Alexander Graf3d6368e2008-11-25 20:17:07 +01002539 /* In case we don't even reach vcpu_run, the fields are not updated */
2540 svm->vmcb->save.rax = nested_vmcb->save.rax;
2541 svm->vmcb->save.rsp = nested_vmcb->save.rsp;
2542 svm->vmcb->save.rip = nested_vmcb->save.rip;
2543 svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
2544 svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
2545 svm->vmcb->save.cpl = nested_vmcb->save.cpl;
2546
Joerg Roedelf7138532010-03-01 15:34:40 +01002547 svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002548 svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002549
Joerg Roedelaad42c62009-08-07 11:49:34 +02002550 /* cache intercepts */
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002551 svm->nested.intercept_cr = nested_vmcb->control.intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +01002552 svm->nested.intercept_dr = nested_vmcb->control.intercept_dr;
Joerg Roedelaad42c62009-08-07 11:49:34 +02002553 svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
2554 svm->nested.intercept = nested_vmcb->control.intercept;
2555
Joerg Roedelf40f6a42010-12-03 15:25:15 +01002556 svm_flush_tlb(&svm->vcpu);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002557 svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002558 if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
2559 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
2560 else
2561 svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
2562
Joerg Roedel88ab24a2010-02-19 16:23:06 +01002563 if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
2564 /* We only want the cr8 intercept bits of the guest */
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002565 clr_cr_intercept(svm, INTERCEPT_CR8_READ);
2566 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Joerg Roedel88ab24a2010-02-19 16:23:06 +01002567 }
2568
Joerg Roedel0d945bd2010-05-05 16:04:45 +02002569 /* We don't want to see VMMCALLs from a nested guest */
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01002570 clr_intercept(svm, INTERCEPT_VMMCALL);
Joerg Roedel0d945bd2010-05-05 16:04:45 +02002571
Joerg Roedel88ab24a2010-02-19 16:23:06 +01002572 svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002573 svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
2574 svm->vmcb->control.int_state = nested_vmcb->control.int_state;
2575 svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002576 svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
2577 svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
2578
Joerg Roedel7597f122010-02-19 16:23:00 +01002579 nested_svm_unmap(page);
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002580
Joerg Roedel20307532010-11-29 17:51:48 +01002581 /* Enter Guest-Mode */
2582 enter_guest_mode(&svm->vcpu);
2583
Joerg Roedel384c6362010-11-30 18:03:56 +01002584 /*
2585 * Merge guest and host intercepts - must be called with vcpu in
2586 * guest-mode to take affect here
2587 */
2588 recalc_intercepts(svm);
2589
Joerg Roedel06fc77722010-02-19 16:23:07 +01002590 svm->nested.vmcb = vmcb_gpa;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002591
Joerg Roedel2af91942009-08-07 11:49:28 +02002592 enable_gif(svm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002593
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01002594 mark_all_dirty(svm->vmcb);
2595
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002596 return true;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002597}
2598
Joerg Roedel9966bf62009-08-07 11:49:40 +02002599static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
Alexander Graf55426752008-11-25 20:17:06 +01002600{
2601 to_vmcb->save.fs = from_vmcb->save.fs;
2602 to_vmcb->save.gs = from_vmcb->save.gs;
2603 to_vmcb->save.tr = from_vmcb->save.tr;
2604 to_vmcb->save.ldtr = from_vmcb->save.ldtr;
2605 to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
2606 to_vmcb->save.star = from_vmcb->save.star;
2607 to_vmcb->save.lstar = from_vmcb->save.lstar;
2608 to_vmcb->save.cstar = from_vmcb->save.cstar;
2609 to_vmcb->save.sfmask = from_vmcb->save.sfmask;
2610 to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
2611 to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
2612 to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
Alexander Graf55426752008-11-25 20:17:06 +01002613}
2614
Avi Kivity851ba692009-08-24 11:10:17 +03002615static int vmload_interception(struct vcpu_svm *svm)
Alexander Graf55426752008-11-25 20:17:06 +01002616{
Joerg Roedel9966bf62009-08-07 11:49:40 +02002617 struct vmcb *nested_vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002618 struct page *page;
Joerg Roedel9966bf62009-08-07 11:49:40 +02002619
Alexander Graf55426752008-11-25 20:17:06 +01002620 if (nested_svm_check_permissions(svm))
2621 return 1;
2622
Joerg Roedel7597f122010-02-19 16:23:00 +01002623 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
Joerg Roedel9966bf62009-08-07 11:49:40 +02002624 if (!nested_vmcb)
2625 return 1;
2626
Joerg Roedele3e9ed32011-04-06 12:30:03 +02002627 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2628 skip_emulated_instruction(&svm->vcpu);
2629
Joerg Roedel9966bf62009-08-07 11:49:40 +02002630 nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
Joerg Roedel7597f122010-02-19 16:23:00 +01002631 nested_svm_unmap(page);
Alexander Graf55426752008-11-25 20:17:06 +01002632
2633 return 1;
2634}
2635
Avi Kivity851ba692009-08-24 11:10:17 +03002636static int vmsave_interception(struct vcpu_svm *svm)
Alexander Graf55426752008-11-25 20:17:06 +01002637{
Joerg Roedel9966bf62009-08-07 11:49:40 +02002638 struct vmcb *nested_vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002639 struct page *page;
Joerg Roedel9966bf62009-08-07 11:49:40 +02002640
Alexander Graf55426752008-11-25 20:17:06 +01002641 if (nested_svm_check_permissions(svm))
2642 return 1;
2643
Joerg Roedel7597f122010-02-19 16:23:00 +01002644 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
Joerg Roedel9966bf62009-08-07 11:49:40 +02002645 if (!nested_vmcb)
2646 return 1;
2647
Joerg Roedele3e9ed32011-04-06 12:30:03 +02002648 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2649 skip_emulated_instruction(&svm->vcpu);
2650
Joerg Roedel9966bf62009-08-07 11:49:40 +02002651 nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
Joerg Roedel7597f122010-02-19 16:23:00 +01002652 nested_svm_unmap(page);
Alexander Graf55426752008-11-25 20:17:06 +01002653
2654 return 1;
2655}
2656
Avi Kivity851ba692009-08-24 11:10:17 +03002657static int vmrun_interception(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002658{
Alexander Graf3d6368e2008-11-25 20:17:07 +01002659 if (nested_svm_check_permissions(svm))
2660 return 1;
2661
Roedel, Joergb75f4eb2010-09-03 14:21:40 +02002662 /* Save rip after vmrun instruction */
2663 kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002664
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002665 if (!nested_svm_vmrun(svm))
Alexander Graf3d6368e2008-11-25 20:17:07 +01002666 return 1;
2667
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002668 if (!nested_svm_vmrun_msrpm(svm))
Joerg Roedel1f8da472009-08-07 11:49:43 +02002669 goto failed;
2670
2671 return 1;
2672
2673failed:
2674
2675 svm->vmcb->control.exit_code = SVM_EXIT_ERR;
2676 svm->vmcb->control.exit_code_hi = 0;
2677 svm->vmcb->control.exit_info_1 = 0;
2678 svm->vmcb->control.exit_info_2 = 0;
2679
2680 nested_svm_vmexit(svm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002681
2682 return 1;
2683}
2684
Avi Kivity851ba692009-08-24 11:10:17 +03002685static int stgi_interception(struct vcpu_svm *svm)
Alexander Graf1371d902008-11-25 20:17:04 +01002686{
2687 if (nested_svm_check_permissions(svm))
2688 return 1;
2689
2690 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2691 skip_emulated_instruction(&svm->vcpu);
Avi Kivity3842d132010-07-27 12:30:24 +03002692 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
Alexander Graf1371d902008-11-25 20:17:04 +01002693
Joerg Roedel2af91942009-08-07 11:49:28 +02002694 enable_gif(svm);
Alexander Graf1371d902008-11-25 20:17:04 +01002695
2696 return 1;
2697}
2698
Avi Kivity851ba692009-08-24 11:10:17 +03002699static int clgi_interception(struct vcpu_svm *svm)
Alexander Graf1371d902008-11-25 20:17:04 +01002700{
2701 if (nested_svm_check_permissions(svm))
2702 return 1;
2703
2704 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2705 skip_emulated_instruction(&svm->vcpu);
2706
Joerg Roedel2af91942009-08-07 11:49:28 +02002707 disable_gif(svm);
Alexander Graf1371d902008-11-25 20:17:04 +01002708
2709 /* After a CLGI no interrupts should come */
2710 svm_clear_vintr(svm);
2711 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
2712
Joerg Roedeldecdbf62010-12-03 11:45:52 +01002713 mark_dirty(svm->vmcb, VMCB_INTR);
2714
Alexander Graf1371d902008-11-25 20:17:04 +01002715 return 1;
2716}
2717
Avi Kivity851ba692009-08-24 11:10:17 +03002718static int invlpga_interception(struct vcpu_svm *svm)
Alexander Grafff092382009-06-15 15:21:24 +02002719{
2720 struct kvm_vcpu *vcpu = &svm->vcpu;
Alexander Grafff092382009-06-15 15:21:24 +02002721
Joerg Roedelec1ff792009-10-09 16:08:31 +02002722 trace_kvm_invlpga(svm->vmcb->save.rip, vcpu->arch.regs[VCPU_REGS_RCX],
2723 vcpu->arch.regs[VCPU_REGS_RAX]);
2724
Alexander Grafff092382009-06-15 15:21:24 +02002725 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
2726 kvm_mmu_invlpg(vcpu, vcpu->arch.regs[VCPU_REGS_RAX]);
2727
2728 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2729 skip_emulated_instruction(&svm->vcpu);
2730 return 1;
2731}
2732
Joerg Roedel532a46b2009-10-09 16:08:32 +02002733static int skinit_interception(struct vcpu_svm *svm)
2734{
2735 trace_kvm_skinit(svm->vmcb->save.rip, svm->vcpu.arch.regs[VCPU_REGS_RAX]);
2736
2737 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2738 return 1;
2739}
2740
Joerg Roedel81dd35d2010-12-07 17:15:06 +01002741static int xsetbv_interception(struct vcpu_svm *svm)
2742{
2743 u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
2744 u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
2745
2746 if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
2747 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2748 skip_emulated_instruction(&svm->vcpu);
2749 }
2750
2751 return 1;
2752}
2753
Avi Kivity851ba692009-08-24 11:10:17 +03002754static int invalid_op_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002755{
Avi Kivity7ee5d9402007-11-25 15:22:50 +02002756 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08002757 return 1;
2758}
2759
Avi Kivity851ba692009-08-24 11:10:17 +03002760static int task_switch_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002761{
Izik Eidus37817f22008-03-24 23:14:53 +02002762 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002763 int reason;
2764 int int_type = svm->vmcb->control.exit_int_info &
2765 SVM_EXITINTINFO_TYPE_MASK;
Gleb Natapov8317c292009-04-12 13:37:02 +03002766 int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002767 uint32_t type =
2768 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
2769 uint32_t idt_v =
2770 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
Jan Kiszkae269fb22010-04-14 15:51:09 +02002771 bool has_error_code = false;
2772 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02002773
2774 tss_selector = (u16)svm->vmcb->control.exit_info_1;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002775
Izik Eidus37817f22008-03-24 23:14:53 +02002776 if (svm->vmcb->control.exit_info_2 &
2777 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002778 reason = TASK_SWITCH_IRET;
2779 else if (svm->vmcb->control.exit_info_2 &
2780 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
2781 reason = TASK_SWITCH_JMP;
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002782 else if (idt_v)
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002783 reason = TASK_SWITCH_GATE;
2784 else
2785 reason = TASK_SWITCH_CALL;
2786
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002787 if (reason == TASK_SWITCH_GATE) {
2788 switch (type) {
2789 case SVM_EXITINTINFO_TYPE_NMI:
2790 svm->vcpu.arch.nmi_injected = false;
2791 break;
2792 case SVM_EXITINTINFO_TYPE_EXEPT:
Jan Kiszkae269fb22010-04-14 15:51:09 +02002793 if (svm->vmcb->control.exit_info_2 &
2794 (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
2795 has_error_code = true;
2796 error_code =
2797 (u32)svm->vmcb->control.exit_info_2;
2798 }
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002799 kvm_clear_exception_queue(&svm->vcpu);
2800 break;
2801 case SVM_EXITINTINFO_TYPE_INTR:
2802 kvm_clear_interrupt_queue(&svm->vcpu);
2803 break;
2804 default:
2805 break;
2806 }
2807 }
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002808
Gleb Natapov8317c292009-04-12 13:37:02 +03002809 if (reason != TASK_SWITCH_GATE ||
2810 int_type == SVM_EXITINTINFO_TYPE_SOFT ||
2811 (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
Gleb Natapovf629cf82009-05-11 13:35:49 +03002812 (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
2813 skip_emulated_instruction(&svm->vcpu);
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002814
Kevin Wolf7f3d35f2012-02-08 14:34:38 +01002815 if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
2816 int_vec = -1;
2817
2818 if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
Gleb Natapovacb54512010-04-15 21:03:50 +03002819 has_error_code, error_code) == EMULATE_FAIL) {
2820 svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2821 svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
2822 svm->vcpu.run->internal.ndata = 0;
2823 return 0;
2824 }
2825 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002826}
2827
Avi Kivity851ba692009-08-24 11:10:17 +03002828static int cpuid_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002829{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002830 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10002831 kvm_emulate_cpuid(&svm->vcpu);
Avi Kivity06465c52007-02-28 20:46:53 +02002832 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002833}
2834
Avi Kivity851ba692009-08-24 11:10:17 +03002835static int iret_interception(struct vcpu_svm *svm)
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002836{
2837 ++svm->vcpu.stat.nmi_window_exits;
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01002838 clr_intercept(svm, INTERCEPT_IRET);
Gleb Natapov44c11432009-05-11 13:35:52 +03002839 svm->vcpu.arch.hflags |= HF_IRET_MASK;
Avi Kivitybd3d1ec2011-02-03 15:29:52 +02002840 svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002841 return 1;
2842}
2843
Avi Kivity851ba692009-08-24 11:10:17 +03002844static int invlpg_interception(struct vcpu_svm *svm)
Marcelo Tosattia7052892008-09-23 13:18:35 -03002845{
Andre Przywaradf4f31082010-12-21 11:12:06 +01002846 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
2847 return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
2848
2849 kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
2850 skip_emulated_instruction(&svm->vcpu);
2851 return 1;
Marcelo Tosattia7052892008-09-23 13:18:35 -03002852}
2853
Avi Kivity851ba692009-08-24 11:10:17 +03002854static int emulate_on_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002855{
Andre Przywara51d8b662010-12-21 11:12:02 +01002856 return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002857}
2858
Avi Kivity332b56e2011-11-10 14:57:24 +02002859static int rdpmc_interception(struct vcpu_svm *svm)
2860{
2861 int err;
2862
2863 if (!static_cpu_has(X86_FEATURE_NRIPS))
2864 return emulate_on_interception(svm);
2865
2866 err = kvm_rdpmc(&svm->vcpu);
2867 kvm_complete_insn_gp(&svm->vcpu, err);
2868
2869 return 1;
2870}
2871
Joerg Roedel628afd22011-04-04 12:39:36 +02002872bool check_selective_cr0_intercepted(struct vcpu_svm *svm, unsigned long val)
2873{
2874 unsigned long cr0 = svm->vcpu.arch.cr0;
2875 bool ret = false;
2876 u64 intercept;
2877
2878 intercept = svm->nested.intercept;
2879
2880 if (!is_guest_mode(&svm->vcpu) ||
2881 (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
2882 return false;
2883
2884 cr0 &= ~SVM_CR0_SELECTIVE_MASK;
2885 val &= ~SVM_CR0_SELECTIVE_MASK;
2886
2887 if (cr0 ^ val) {
2888 svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
2889 ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
2890 }
2891
2892 return ret;
2893}
2894
Andre Przywara7ff76d52010-12-21 11:12:04 +01002895#define CR_VALID (1ULL << 63)
2896
2897static int cr_interception(struct vcpu_svm *svm)
2898{
2899 int reg, cr;
2900 unsigned long val;
2901 int err;
2902
2903 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
2904 return emulate_on_interception(svm);
2905
2906 if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
2907 return emulate_on_interception(svm);
2908
2909 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
2910 cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
2911
2912 err = 0;
2913 if (cr >= 16) { /* mov to cr */
2914 cr -= 16;
2915 val = kvm_register_read(&svm->vcpu, reg);
2916 switch (cr) {
2917 case 0:
Joerg Roedel628afd22011-04-04 12:39:36 +02002918 if (!check_selective_cr0_intercepted(svm, val))
2919 err = kvm_set_cr0(&svm->vcpu, val);
Joerg Roedel977b2d02011-04-18 11:42:52 +02002920 else
2921 return 1;
2922
Andre Przywara7ff76d52010-12-21 11:12:04 +01002923 break;
2924 case 3:
2925 err = kvm_set_cr3(&svm->vcpu, val);
2926 break;
2927 case 4:
2928 err = kvm_set_cr4(&svm->vcpu, val);
2929 break;
2930 case 8:
2931 err = kvm_set_cr8(&svm->vcpu, val);
2932 break;
2933 default:
2934 WARN(1, "unhandled write to CR%d", cr);
2935 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2936 return 1;
2937 }
2938 } else { /* mov from cr */
2939 switch (cr) {
2940 case 0:
2941 val = kvm_read_cr0(&svm->vcpu);
2942 break;
2943 case 2:
2944 val = svm->vcpu.arch.cr2;
2945 break;
2946 case 3:
Avi Kivity9f8fe502010-12-05 17:30:00 +02002947 val = kvm_read_cr3(&svm->vcpu);
Andre Przywara7ff76d52010-12-21 11:12:04 +01002948 break;
2949 case 4:
2950 val = kvm_read_cr4(&svm->vcpu);
2951 break;
2952 case 8:
2953 val = kvm_get_cr8(&svm->vcpu);
2954 break;
2955 default:
2956 WARN(1, "unhandled read from CR%d", cr);
2957 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2958 return 1;
2959 }
2960 kvm_register_write(&svm->vcpu, reg, val);
2961 }
2962 kvm_complete_insn_gp(&svm->vcpu, err);
2963
2964 return 1;
2965}
2966
Andre Przywaracae37972010-12-21 11:12:05 +01002967static int dr_interception(struct vcpu_svm *svm)
2968{
2969 int reg, dr;
2970 unsigned long val;
2971 int err;
2972
2973 if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
2974 return emulate_on_interception(svm);
2975
2976 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
2977 dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
2978
2979 if (dr >= 16) { /* mov to DRn */
2980 val = kvm_register_read(&svm->vcpu, reg);
2981 kvm_set_dr(&svm->vcpu, dr - 16, val);
2982 } else {
2983 err = kvm_get_dr(&svm->vcpu, dr, &val);
2984 if (!err)
2985 kvm_register_write(&svm->vcpu, reg, val);
2986 }
2987
Joerg Roedel2c46d2a2011-02-09 18:29:39 +01002988 skip_emulated_instruction(&svm->vcpu);
2989
Andre Przywaracae37972010-12-21 11:12:05 +01002990 return 1;
2991}
2992
Avi Kivity851ba692009-08-24 11:10:17 +03002993static int cr8_write_interception(struct vcpu_svm *svm)
Joerg Roedel1d075432007-12-06 21:02:25 +01002994{
Avi Kivity851ba692009-08-24 11:10:17 +03002995 struct kvm_run *kvm_run = svm->vcpu.run;
Andre Przywaraeea1cff2010-12-21 11:12:00 +01002996 int r;
Avi Kivity851ba692009-08-24 11:10:17 +03002997
Gleb Natapov0a5fff192009-04-21 17:45:06 +03002998 u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
2999 /* instruction emulation calls kvm_set_cr8() */
Andre Przywara7ff76d52010-12-21 11:12:04 +01003000 r = cr_interception(svm);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003001 if (irqchip_in_kernel(svm->vcpu.kvm)) {
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003002 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Andre Przywara7ff76d52010-12-21 11:12:04 +01003003 return r;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003004 }
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003005 if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
Andre Przywara7ff76d52010-12-21 11:12:04 +01003006 return r;
Joerg Roedel1d075432007-12-06 21:02:25 +01003007 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
3008 return 0;
3009}
3010
Nadav Har'Eld5c17852011-08-02 15:54:20 +03003011u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu)
3012{
3013 struct vmcb *vmcb = get_host_vmcb(to_svm(vcpu));
3014 return vmcb->control.tsc_offset +
3015 svm_scale_tsc(vcpu, native_read_tsc());
3016}
3017
Avi Kivity6aa8b732006-12-10 02:21:36 -08003018static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
3019{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003020 struct vcpu_svm *svm = to_svm(vcpu);
3021
Avi Kivity6aa8b732006-12-10 02:21:36 -08003022 switch (ecx) {
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05303023 case MSR_IA32_TSC: {
Nadav Har'El45133ec2011-08-02 15:55:23 +03003024 *data = svm->vmcb->control.tsc_offset +
Joerg Roedelfbc0db72011-03-25 09:44:46 +01003025 svm_scale_tsc(vcpu, native_read_tsc());
3026
Avi Kivity6aa8b732006-12-10 02:21:36 -08003027 break;
3028 }
Brian Gerst8c065852010-07-17 09:03:26 -04003029 case MSR_STAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003030 *data = svm->vmcb->save.star;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003031 break;
Avi Kivity0e859ca2006-12-22 01:05:08 -08003032#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08003033 case MSR_LSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003034 *data = svm->vmcb->save.lstar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003035 break;
3036 case MSR_CSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003037 *data = svm->vmcb->save.cstar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003038 break;
3039 case MSR_KERNEL_GS_BASE:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003040 *data = svm->vmcb->save.kernel_gs_base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003041 break;
3042 case MSR_SYSCALL_MASK:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003043 *data = svm->vmcb->save.sfmask;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003044 break;
3045#endif
3046 case MSR_IA32_SYSENTER_CS:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003047 *data = svm->vmcb->save.sysenter_cs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003048 break;
3049 case MSR_IA32_SYSENTER_EIP:
Andre Przywara017cb992009-05-28 11:56:31 +02003050 *data = svm->sysenter_eip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003051 break;
3052 case MSR_IA32_SYSENTER_ESP:
Andre Przywara017cb992009-05-28 11:56:31 +02003053 *data = svm->sysenter_esp;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003054 break;
Joerg Roedele0231712010-02-24 18:59:10 +01003055 /*
3056 * Nobody will change the following 5 values in the VMCB so we can
3057 * safely return them on rdmsr. They will always be 0 until LBRV is
3058 * implemented.
3059 */
Joerg Roedela2938c82008-02-13 16:30:28 +01003060 case MSR_IA32_DEBUGCTLMSR:
3061 *data = svm->vmcb->save.dbgctl;
3062 break;
3063 case MSR_IA32_LASTBRANCHFROMIP:
3064 *data = svm->vmcb->save.br_from;
3065 break;
3066 case MSR_IA32_LASTBRANCHTOIP:
3067 *data = svm->vmcb->save.br_to;
3068 break;
3069 case MSR_IA32_LASTINTFROMIP:
3070 *data = svm->vmcb->save.last_excp_from;
3071 break;
3072 case MSR_IA32_LASTINTTOIP:
3073 *data = svm->vmcb->save.last_excp_to;
3074 break;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003075 case MSR_VM_HSAVE_PA:
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02003076 *data = svm->nested.hsave_msr;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003077 break;
Joerg Roedeleb6f3022008-11-25 20:17:09 +01003078 case MSR_VM_CR:
Joerg Roedel4a810182010-02-24 18:59:15 +01003079 *data = svm->nested.vm_cr_msr;
Joerg Roedeleb6f3022008-11-25 20:17:09 +01003080 break;
Alexander Grafc8a73f12009-01-05 16:02:47 +01003081 case MSR_IA32_UCODE_REV:
3082 *data = 0x01000065;
3083 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003084 default:
Avi Kivity3bab1f52006-12-29 16:49:48 -08003085 return kvm_get_msr_common(vcpu, ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003086 }
3087 return 0;
3088}
3089
Avi Kivity851ba692009-08-24 11:10:17 +03003090static int rdmsr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003091{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003092 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
Avi Kivity6aa8b732006-12-10 02:21:36 -08003093 u64 data;
3094
Avi Kivity59200272010-01-25 19:47:02 +02003095 if (svm_get_msr(&svm->vcpu, ecx, &data)) {
3096 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003097 kvm_inject_gp(&svm->vcpu, 0);
Avi Kivity59200272010-01-25 19:47:02 +02003098 } else {
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003099 trace_kvm_msr_read(ecx, data);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003100
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003101 svm->vcpu.arch.regs[VCPU_REGS_RAX] = data & 0xffffffff;
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003102 svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003103 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10003104 skip_emulated_instruction(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003105 }
3106 return 1;
3107}
3108
Joerg Roedel4a810182010-02-24 18:59:15 +01003109static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
3110{
3111 struct vcpu_svm *svm = to_svm(vcpu);
3112 int svm_dis, chg_mask;
3113
3114 if (data & ~SVM_VM_CR_VALID_MASK)
3115 return 1;
3116
3117 chg_mask = SVM_VM_CR_VALID_MASK;
3118
3119 if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
3120 chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);
3121
3122 svm->nested.vm_cr_msr &= ~chg_mask;
3123 svm->nested.vm_cr_msr |= (data & chg_mask);
3124
3125 svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;
3126
3127 /* check for svm_disable while efer.svme is set */
3128 if (svm_dis && (vcpu->arch.efer & EFER_SVME))
3129 return 1;
3130
3131 return 0;
3132}
3133
Avi Kivity6aa8b732006-12-10 02:21:36 -08003134static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
3135{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003136 struct vcpu_svm *svm = to_svm(vcpu);
3137
Avi Kivity6aa8b732006-12-10 02:21:36 -08003138 switch (ecx) {
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10003139 case MSR_IA32_TSC:
Zachary Amsden99e3e302010-08-19 22:07:17 -10003140 kvm_write_tsc(vcpu, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003141 break;
Brian Gerst8c065852010-07-17 09:03:26 -04003142 case MSR_STAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003143 svm->vmcb->save.star = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003144 break;
Robert P. J. Day49b14f22007-01-29 13:19:50 -08003145#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08003146 case MSR_LSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003147 svm->vmcb->save.lstar = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003148 break;
3149 case MSR_CSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003150 svm->vmcb->save.cstar = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003151 break;
3152 case MSR_KERNEL_GS_BASE:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003153 svm->vmcb->save.kernel_gs_base = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003154 break;
3155 case MSR_SYSCALL_MASK:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003156 svm->vmcb->save.sfmask = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003157 break;
3158#endif
3159 case MSR_IA32_SYSENTER_CS:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003160 svm->vmcb->save.sysenter_cs = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003161 break;
3162 case MSR_IA32_SYSENTER_EIP:
Andre Przywara017cb992009-05-28 11:56:31 +02003163 svm->sysenter_eip = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003164 svm->vmcb->save.sysenter_eip = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003165 break;
3166 case MSR_IA32_SYSENTER_ESP:
Andre Przywara017cb992009-05-28 11:56:31 +02003167 svm->sysenter_esp = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003168 svm->vmcb->save.sysenter_esp = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003169 break;
Joerg Roedela2938c82008-02-13 16:30:28 +01003170 case MSR_IA32_DEBUGCTLMSR:
Avi Kivity2a6b20b2010-11-09 16:15:42 +02003171 if (!boot_cpu_has(X86_FEATURE_LBRV)) {
Christoffer Dalla737f252012-06-03 21:17:48 +03003172 vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
3173 __func__, data);
Joerg Roedel24e09cb2008-02-13 18:58:47 +01003174 break;
3175 }
3176 if (data & DEBUGCTL_RESERVED_BITS)
3177 return 1;
3178
3179 svm->vmcb->save.dbgctl = data;
Joerg Roedelb53ba3f2010-12-03 11:45:59 +01003180 mark_dirty(svm->vmcb, VMCB_LBR);
Joerg Roedel24e09cb2008-02-13 18:58:47 +01003181 if (data & (1ULL<<0))
3182 svm_enable_lbrv(svm);
3183 else
3184 svm_disable_lbrv(svm);
Joerg Roedela2938c82008-02-13 16:30:28 +01003185 break;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003186 case MSR_VM_HSAVE_PA:
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02003187 svm->nested.hsave_msr = data;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003188 break;
Alexander Graf3c5d0a42009-06-15 15:21:23 +02003189 case MSR_VM_CR:
Joerg Roedel4a810182010-02-24 18:59:15 +01003190 return svm_set_vm_cr(vcpu, data);
Alexander Graf3c5d0a42009-06-15 15:21:23 +02003191 case MSR_VM_IGNNE:
Christoffer Dalla737f252012-06-03 21:17:48 +03003192 vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
Alexander Graf3c5d0a42009-06-15 15:21:23 +02003193 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003194 default:
Avi Kivity3bab1f52006-12-29 16:49:48 -08003195 return kvm_set_msr_common(vcpu, ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003196 }
3197 return 0;
3198}
3199
Avi Kivity851ba692009-08-24 11:10:17 +03003200static int wrmsr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003201{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003202 u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003203 u64 data = (svm->vcpu.arch.regs[VCPU_REGS_RAX] & -1u)
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003204 | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003205
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003206
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003207 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Avi Kivity59200272010-01-25 19:47:02 +02003208 if (svm_set_msr(&svm->vcpu, ecx, data)) {
3209 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003210 kvm_inject_gp(&svm->vcpu, 0);
Avi Kivity59200272010-01-25 19:47:02 +02003211 } else {
3212 trace_kvm_msr_write(ecx, data);
Rusty Russelle756fc62007-07-30 20:07:08 +10003213 skip_emulated_instruction(&svm->vcpu);
Avi Kivity59200272010-01-25 19:47:02 +02003214 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003215 return 1;
3216}
3217
Avi Kivity851ba692009-08-24 11:10:17 +03003218static int msr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003219{
Rusty Russelle756fc62007-07-30 20:07:08 +10003220 if (svm->vmcb->control.exit_info_1)
Avi Kivity851ba692009-08-24 11:10:17 +03003221 return wrmsr_interception(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003222 else
Avi Kivity851ba692009-08-24 11:10:17 +03003223 return rdmsr_interception(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003224}
3225
Avi Kivity851ba692009-08-24 11:10:17 +03003226static int interrupt_window_interception(struct vcpu_svm *svm)
Dor Laorc1150d82007-01-05 16:36:24 -08003227{
Avi Kivity851ba692009-08-24 11:10:17 +03003228 struct kvm_run *kvm_run = svm->vcpu.run;
3229
Avi Kivity3842d132010-07-27 12:30:24 +03003230 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
Alexander Graff0b85052008-11-25 20:17:01 +01003231 svm_clear_vintr(svm);
Eddie Dong85f455f2007-07-06 12:20:49 +03003232 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
Joerg Roedeldecdbf62010-12-03 11:45:52 +01003233 mark_dirty(svm->vmcb, VMCB_INTR);
Jason Wang675acb72012-03-08 18:07:56 +08003234 ++svm->vcpu.stat.irq_window_exits;
Dor Laorc1150d82007-01-05 16:36:24 -08003235 /*
3236 * If the user space waits to inject interrupts, exit as soon as
3237 * possible
3238 */
Gleb Natapov80618232009-04-21 17:44:56 +03003239 if (!irqchip_in_kernel(svm->vcpu.kvm) &&
3240 kvm_run->request_interrupt_window &&
3241 !kvm_cpu_has_interrupt(&svm->vcpu)) {
Dor Laorc1150d82007-01-05 16:36:24 -08003242 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
3243 return 0;
3244 }
3245
3246 return 1;
3247}
3248
Mark Langsdorf565d0992009-10-06 14:25:02 -05003249static int pause_interception(struct vcpu_svm *svm)
3250{
3251 kvm_vcpu_on_spin(&(svm->vcpu));
3252 return 1;
3253}
3254
Mathias Krause09941fb2012-08-30 01:30:20 +02003255static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
Andre Przywara7ff76d52010-12-21 11:12:04 +01003256 [SVM_EXIT_READ_CR0] = cr_interception,
3257 [SVM_EXIT_READ_CR3] = cr_interception,
3258 [SVM_EXIT_READ_CR4] = cr_interception,
3259 [SVM_EXIT_READ_CR8] = cr_interception,
Avi Kivityd2251572010-01-06 10:55:27 +02003260 [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception,
Joerg Roedel628afd22011-04-04 12:39:36 +02003261 [SVM_EXIT_WRITE_CR0] = cr_interception,
Andre Przywara7ff76d52010-12-21 11:12:04 +01003262 [SVM_EXIT_WRITE_CR3] = cr_interception,
3263 [SVM_EXIT_WRITE_CR4] = cr_interception,
Joerg Roedele0231712010-02-24 18:59:10 +01003264 [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
Andre Przywaracae37972010-12-21 11:12:05 +01003265 [SVM_EXIT_READ_DR0] = dr_interception,
3266 [SVM_EXIT_READ_DR1] = dr_interception,
3267 [SVM_EXIT_READ_DR2] = dr_interception,
3268 [SVM_EXIT_READ_DR3] = dr_interception,
3269 [SVM_EXIT_READ_DR4] = dr_interception,
3270 [SVM_EXIT_READ_DR5] = dr_interception,
3271 [SVM_EXIT_READ_DR6] = dr_interception,
3272 [SVM_EXIT_READ_DR7] = dr_interception,
3273 [SVM_EXIT_WRITE_DR0] = dr_interception,
3274 [SVM_EXIT_WRITE_DR1] = dr_interception,
3275 [SVM_EXIT_WRITE_DR2] = dr_interception,
3276 [SVM_EXIT_WRITE_DR3] = dr_interception,
3277 [SVM_EXIT_WRITE_DR4] = dr_interception,
3278 [SVM_EXIT_WRITE_DR5] = dr_interception,
3279 [SVM_EXIT_WRITE_DR6] = dr_interception,
3280 [SVM_EXIT_WRITE_DR7] = dr_interception,
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003281 [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
3282 [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003283 [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
Joerg Roedele0231712010-02-24 18:59:10 +01003284 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
3285 [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
3286 [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
3287 [SVM_EXIT_INTR] = intr_interception,
Joerg Roedelc47f0982008-04-30 17:56:00 +02003288 [SVM_EXIT_NMI] = nmi_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003289 [SVM_EXIT_SMI] = nop_on_interception,
3290 [SVM_EXIT_INIT] = nop_on_interception,
Dor Laorc1150d82007-01-05 16:36:24 -08003291 [SVM_EXIT_VINTR] = interrupt_window_interception,
Avi Kivity332b56e2011-11-10 14:57:24 +02003292 [SVM_EXIT_RDPMC] = rdpmc_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003293 [SVM_EXIT_CPUID] = cpuid_interception,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003294 [SVM_EXIT_IRET] = iret_interception,
Avi Kivitycf5a94d2007-10-28 16:11:58 +02003295 [SVM_EXIT_INVD] = emulate_on_interception,
Mark Langsdorf565d0992009-10-06 14:25:02 -05003296 [SVM_EXIT_PAUSE] = pause_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003297 [SVM_EXIT_HLT] = halt_interception,
Marcelo Tosattia7052892008-09-23 13:18:35 -03003298 [SVM_EXIT_INVLPG] = invlpg_interception,
Alexander Grafff092382009-06-15 15:21:24 +02003299 [SVM_EXIT_INVLPGA] = invlpga_interception,
Joerg Roedele0231712010-02-24 18:59:10 +01003300 [SVM_EXIT_IOIO] = io_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003301 [SVM_EXIT_MSR] = msr_interception,
3302 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08003303 [SVM_EXIT_SHUTDOWN] = shutdown_interception,
Alexander Graf3d6368e2008-11-25 20:17:07 +01003304 [SVM_EXIT_VMRUN] = vmrun_interception,
Avi Kivity02e235b2007-02-19 14:37:47 +02003305 [SVM_EXIT_VMMCALL] = vmmcall_interception,
Alexander Graf55426752008-11-25 20:17:06 +01003306 [SVM_EXIT_VMLOAD] = vmload_interception,
3307 [SVM_EXIT_VMSAVE] = vmsave_interception,
Alexander Graf1371d902008-11-25 20:17:04 +01003308 [SVM_EXIT_STGI] = stgi_interception,
3309 [SVM_EXIT_CLGI] = clgi_interception,
Joerg Roedel532a46b2009-10-09 16:08:32 +02003310 [SVM_EXIT_SKINIT] = skinit_interception,
Avi Kivitycf5a94d2007-10-28 16:11:58 +02003311 [SVM_EXIT_WBINVD] = emulate_on_interception,
Joerg Roedel916ce232007-03-21 19:47:00 +01003312 [SVM_EXIT_MONITOR] = invalid_op_interception,
3313 [SVM_EXIT_MWAIT] = invalid_op_interception,
Joerg Roedel81dd35d2010-12-07 17:15:06 +01003314 [SVM_EXIT_XSETBV] = xsetbv_interception,
Joerg Roedel709ddeb2008-02-07 13:47:45 +01003315 [SVM_EXIT_NPF] = pf_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003316};
3317
Joe Perchesae8cc052011-04-24 22:00:50 -07003318static void dump_vmcb(struct kvm_vcpu *vcpu)
Joerg Roedel3f10c842010-05-05 16:04:42 +02003319{
3320 struct vcpu_svm *svm = to_svm(vcpu);
3321 struct vmcb_control_area *control = &svm->vmcb->control;
3322 struct vmcb_save_area *save = &svm->vmcb->save;
3323
3324 pr_err("VMCB Control Area:\n");
Joe Perchesae8cc052011-04-24 22:00:50 -07003325 pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
3326 pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
3327 pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
3328 pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
3329 pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
3330 pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
3331 pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
3332 pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
3333 pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
3334 pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
3335 pr_err("%-20s%d\n", "asid:", control->asid);
3336 pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
3337 pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
3338 pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
3339 pr_err("%-20s%08x\n", "int_state:", control->int_state);
3340 pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
3341 pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
3342 pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
3343 pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
3344 pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
3345 pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
3346 pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
3347 pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
3348 pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
3349 pr_err("%-20s%lld\n", "lbr_ctl:", control->lbr_ctl);
3350 pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
Joerg Roedel3f10c842010-05-05 16:04:42 +02003351 pr_err("VMCB State Save Area:\n");
Joe Perchesae8cc052011-04-24 22:00:50 -07003352 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3353 "es:",
3354 save->es.selector, save->es.attrib,
3355 save->es.limit, save->es.base);
3356 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3357 "cs:",
3358 save->cs.selector, save->cs.attrib,
3359 save->cs.limit, save->cs.base);
3360 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3361 "ss:",
3362 save->ss.selector, save->ss.attrib,
3363 save->ss.limit, save->ss.base);
3364 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3365 "ds:",
3366 save->ds.selector, save->ds.attrib,
3367 save->ds.limit, save->ds.base);
3368 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3369 "fs:",
3370 save->fs.selector, save->fs.attrib,
3371 save->fs.limit, save->fs.base);
3372 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3373 "gs:",
3374 save->gs.selector, save->gs.attrib,
3375 save->gs.limit, save->gs.base);
3376 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3377 "gdtr:",
3378 save->gdtr.selector, save->gdtr.attrib,
3379 save->gdtr.limit, save->gdtr.base);
3380 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3381 "ldtr:",
3382 save->ldtr.selector, save->ldtr.attrib,
3383 save->ldtr.limit, save->ldtr.base);
3384 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3385 "idtr:",
3386 save->idtr.selector, save->idtr.attrib,
3387 save->idtr.limit, save->idtr.base);
3388 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3389 "tr:",
3390 save->tr.selector, save->tr.attrib,
3391 save->tr.limit, save->tr.base);
Joerg Roedel3f10c842010-05-05 16:04:42 +02003392 pr_err("cpl: %d efer: %016llx\n",
3393 save->cpl, save->efer);
Joe Perchesae8cc052011-04-24 22:00:50 -07003394 pr_err("%-15s %016llx %-13s %016llx\n",
3395 "cr0:", save->cr0, "cr2:", save->cr2);
3396 pr_err("%-15s %016llx %-13s %016llx\n",
3397 "cr3:", save->cr3, "cr4:", save->cr4);
3398 pr_err("%-15s %016llx %-13s %016llx\n",
3399 "dr6:", save->dr6, "dr7:", save->dr7);
3400 pr_err("%-15s %016llx %-13s %016llx\n",
3401 "rip:", save->rip, "rflags:", save->rflags);
3402 pr_err("%-15s %016llx %-13s %016llx\n",
3403 "rsp:", save->rsp, "rax:", save->rax);
3404 pr_err("%-15s %016llx %-13s %016llx\n",
3405 "star:", save->star, "lstar:", save->lstar);
3406 pr_err("%-15s %016llx %-13s %016llx\n",
3407 "cstar:", save->cstar, "sfmask:", save->sfmask);
3408 pr_err("%-15s %016llx %-13s %016llx\n",
3409 "kernel_gs_base:", save->kernel_gs_base,
3410 "sysenter_cs:", save->sysenter_cs);
3411 pr_err("%-15s %016llx %-13s %016llx\n",
3412 "sysenter_esp:", save->sysenter_esp,
3413 "sysenter_eip:", save->sysenter_eip);
3414 pr_err("%-15s %016llx %-13s %016llx\n",
3415 "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
3416 pr_err("%-15s %016llx %-13s %016llx\n",
3417 "br_from:", save->br_from, "br_to:", save->br_to);
3418 pr_err("%-15s %016llx %-13s %016llx\n",
3419 "excp_from:", save->last_excp_from,
3420 "excp_to:", save->last_excp_to);
Joerg Roedel3f10c842010-05-05 16:04:42 +02003421}
3422
Avi Kivity586f9602010-11-18 13:09:54 +02003423static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
3424{
3425 struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
3426
3427 *info1 = control->exit_info_1;
3428 *info2 = control->exit_info_2;
3429}
3430
Avi Kivity851ba692009-08-24 11:10:17 +03003431static int handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003432{
Avi Kivity04d2cc72007-09-10 18:10:54 +03003433 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03003434 struct kvm_run *kvm_run = vcpu->run;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003435 u32 exit_code = svm->vmcb->control.exit_code;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003436
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003437 if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
Joerg Roedel2be4fc72010-04-22 12:33:09 +02003438 vcpu->arch.cr0 = svm->vmcb->save.cr0;
3439 if (npt_enabled)
3440 vcpu->arch.cr3 = svm->vmcb->save.cr3;
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003441
Joerg Roedelcd3ff652009-10-09 16:08:26 +02003442 if (unlikely(svm->nested.exit_required)) {
3443 nested_svm_vmexit(svm);
3444 svm->nested.exit_required = false;
3445
3446 return 1;
3447 }
3448
Joerg Roedel20307532010-11-29 17:51:48 +01003449 if (is_guest_mode(vcpu)) {
Joerg Roedel410e4d52009-08-07 11:49:44 +02003450 int vmexit;
3451
Joerg Roedeld8cabdd2009-10-09 16:08:28 +02003452 trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
3453 svm->vmcb->control.exit_info_1,
3454 svm->vmcb->control.exit_info_2,
3455 svm->vmcb->control.exit_int_info,
Stefan Hajnoczie097e5f2011-07-22 12:46:52 +01003456 svm->vmcb->control.exit_int_info_err,
3457 KVM_ISA_SVM);
Joerg Roedeld8cabdd2009-10-09 16:08:28 +02003458
Joerg Roedel410e4d52009-08-07 11:49:44 +02003459 vmexit = nested_svm_exit_special(svm);
3460
3461 if (vmexit == NESTED_EXIT_CONTINUE)
3462 vmexit = nested_svm_exit_handled(svm);
3463
3464 if (vmexit == NESTED_EXIT_DONE)
Alexander Grafcf74a782008-11-25 20:17:08 +01003465 return 1;
Alexander Grafcf74a782008-11-25 20:17:08 +01003466 }
3467
Joerg Roedela5c38322009-08-07 11:49:32 +02003468 svm_complete_interrupts(svm);
3469
Avi Kivity04d2cc72007-09-10 18:10:54 +03003470 if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
3471 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3472 kvm_run->fail_entry.hardware_entry_failure_reason
3473 = svm->vmcb->control.exit_code;
Joerg Roedel3f10c842010-05-05 16:04:42 +02003474 pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
3475 dump_vmcb(vcpu);
Avi Kivity04d2cc72007-09-10 18:10:54 +03003476 return 0;
3477 }
3478
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003479 if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
Joerg Roedel709ddeb2008-02-07 13:47:45 +01003480 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
Joerg Roedel55c5e462010-09-10 17:31:04 +02003481 exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
3482 exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003483 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
3484 "exit_code 0x%x\n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08003485 __func__, svm->vmcb->control.exit_int_info,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003486 exit_code);
3487
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +02003488 if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
Joe Perches56919c52007-11-12 20:06:51 -08003489 || !svm_exit_handlers[exit_code]) {
Avi Kivity6aa8b732006-12-10 02:21:36 -08003490 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
Avi Kivity364b6252007-04-16 14:28:40 +03003491 kvm_run->hw.hardware_exit_reason = exit_code;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003492 return 0;
3493 }
3494
Avi Kivity851ba692009-08-24 11:10:17 +03003495 return svm_exit_handlers[exit_code](svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003496}
3497
3498static void reload_tss(struct kvm_vcpu *vcpu)
3499{
3500 int cpu = raw_smp_processor_id();
3501
Tejun Heo0fe1e002009-10-29 22:34:14 +09003502 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
3503 sd->tss_desc->type = 9; /* available 32/64-bit TSS */
Avi Kivity6aa8b732006-12-10 02:21:36 -08003504 load_TR_desc();
3505}
3506
Rusty Russelle756fc62007-07-30 20:07:08 +10003507static void pre_svm_run(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003508{
3509 int cpu = raw_smp_processor_id();
3510
Tejun Heo0fe1e002009-10-29 22:34:14 +09003511 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003512
Marcelo Tosatti4b656b12009-07-21 12:47:45 -03003513 /* FIXME: handle wraparound of asid_generation */
Tejun Heo0fe1e002009-10-29 22:34:14 +09003514 if (svm->asid_generation != sd->asid_generation)
3515 new_asid(svm, sd);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003516}
3517
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003518static void svm_inject_nmi(struct kvm_vcpu *vcpu)
3519{
3520 struct vcpu_svm *svm = to_svm(vcpu);
3521
3522 svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
3523 vcpu->arch.hflags |= HF_NMI_MASK;
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01003524 set_intercept(svm, INTERCEPT_IRET);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003525 ++vcpu->stat.nmi_injections;
3526}
Avi Kivity6aa8b732006-12-10 02:21:36 -08003527
Eddie Dong85f455f2007-07-06 12:20:49 +03003528static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003529{
3530 struct vmcb_control_area *control;
3531
Rusty Russelle756fc62007-07-30 20:07:08 +10003532 control = &svm->vmcb->control;
Eddie Dong85f455f2007-07-06 12:20:49 +03003533 control->int_vector = irq;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003534 control->int_ctl &= ~V_INTR_PRIO_MASK;
3535 control->int_ctl |= V_IRQ_MASK |
3536 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
Joerg Roedeldecdbf62010-12-03 11:45:52 +01003537 mark_dirty(svm->vmcb, VMCB_INTR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003538}
3539
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003540static void svm_set_irq(struct kvm_vcpu *vcpu)
Eddie Dong2a8067f2007-08-06 16:29:07 +03003541{
3542 struct vcpu_svm *svm = to_svm(vcpu);
3543
Joerg Roedel2af91942009-08-07 11:49:28 +02003544 BUG_ON(!(gif_set(svm)));
Alexander Grafcf74a782008-11-25 20:17:08 +01003545
Gleb Natapov9fb2d2b2010-05-23 14:28:26 +03003546 trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
3547 ++vcpu->stat.irq_injections;
3548
Alexander Graf219b65d2009-06-15 15:21:25 +02003549 svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
3550 SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
Eddie Dong2a8067f2007-08-06 16:29:07 +03003551}
3552
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003553static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
3554{
3555 struct vcpu_svm *svm = to_svm(vcpu);
3556
Joerg Roedel20307532010-11-29 17:51:48 +01003557 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
Joerg Roedel88ab24a2010-02-19 16:23:06 +01003558 return;
3559
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003560 if (irr == -1)
3561 return;
3562
3563 if (tpr >= irr)
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003564 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003565}
3566
3567static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
Joerg Roedelaaacfc92008-04-16 16:51:18 +02003568{
3569 struct vcpu_svm *svm = to_svm(vcpu);
3570 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel924584c2010-04-22 12:33:07 +02003571 int ret;
3572 ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
3573 !(svm->vcpu.arch.hflags & HF_NMI_MASK);
3574 ret = ret && gif_set(svm) && nested_svm_nmi(svm);
3575
3576 return ret;
Joerg Roedelaaacfc92008-04-16 16:51:18 +02003577}
3578
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003579static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
3580{
3581 struct vcpu_svm *svm = to_svm(vcpu);
3582
3583 return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
3584}
3585
3586static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
3587{
3588 struct vcpu_svm *svm = to_svm(vcpu);
3589
3590 if (masked) {
3591 svm->vcpu.arch.hflags |= HF_NMI_MASK;
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01003592 set_intercept(svm, INTERCEPT_IRET);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003593 } else {
3594 svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
Joerg Roedel8a05a1b82010-11-30 18:04:00 +01003595 clr_intercept(svm, INTERCEPT_IRET);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003596 }
3597}
3598
Gleb Natapov78646122009-03-23 12:12:11 +02003599static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
3600{
3601 struct vcpu_svm *svm = to_svm(vcpu);
3602 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7fcdb512009-09-16 15:24:15 +02003603 int ret;
3604
3605 if (!gif_set(svm) ||
3606 (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
3607 return 0;
3608
Avi Kivityf6e78472010-08-02 15:30:20 +03003609 ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
Joerg Roedel7fcdb512009-09-16 15:24:15 +02003610
Joerg Roedel20307532010-11-29 17:51:48 +01003611 if (is_guest_mode(vcpu))
Joerg Roedel7fcdb512009-09-16 15:24:15 +02003612 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
3613
3614 return ret;
Gleb Natapov78646122009-03-23 12:12:11 +02003615}
3616
Gleb Natapov9222be12009-04-23 17:14:37 +03003617static void enable_irq_window(struct kvm_vcpu *vcpu)
3618{
Alexander Graf219b65d2009-06-15 15:21:25 +02003619 struct vcpu_svm *svm = to_svm(vcpu);
Alexander Graf219b65d2009-06-15 15:21:25 +02003620
Joerg Roedele0231712010-02-24 18:59:10 +01003621 /*
3622 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
3623 * 1, because that's a separate STGI/VMRUN intercept. The next time we
3624 * get that intercept, this function will be called again though and
3625 * we'll get the vintr intercept.
3626 */
Joerg Roedel8fe54652010-02-19 16:23:01 +01003627 if (gif_set(svm) && nested_svm_intr(svm)) {
Alexander Graf219b65d2009-06-15 15:21:25 +02003628 svm_set_vintr(svm);
3629 svm_inject_irq(svm, 0x0);
3630 }
Gleb Natapov9222be12009-04-23 17:14:37 +03003631}
3632
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003633static void enable_nmi_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003634{
Avi Kivity04d2cc72007-09-10 18:10:54 +03003635 struct vcpu_svm *svm = to_svm(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03003636
Gleb Natapov44c11432009-05-11 13:35:52 +03003637 if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
3638 == HF_NMI_MASK)
3639 return; /* IRET will cause a vm exit */
3640
Joerg Roedele0231712010-02-24 18:59:10 +01003641 /*
3642 * Something prevents NMI from been injected. Single step over possible
3643 * problem (IRET or exception injection or interrupt shadow)
3644 */
Jan Kiszka6be7d302009-10-18 13:24:54 +02003645 svm->nmi_singlestep = true;
Gleb Natapov44c11432009-05-11 13:35:52 +03003646 svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
Jan Kiszkac8639012012-09-21 05:42:55 +02003647 update_db_bp_intercept(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03003648}
3649
Izik Eiduscbc94022007-10-25 00:29:55 +02003650static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
3651{
3652 return 0;
3653}
3654
Avi Kivityd9e368d2007-06-07 19:18:30 +03003655static void svm_flush_tlb(struct kvm_vcpu *vcpu)
3656{
Joerg Roedel38e5e922010-12-03 15:25:16 +01003657 struct vcpu_svm *svm = to_svm(vcpu);
3658
3659 if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
3660 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
3661 else
3662 svm->asid_generation--;
Avi Kivityd9e368d2007-06-07 19:18:30 +03003663}
3664
Avi Kivity04d2cc72007-09-10 18:10:54 +03003665static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
3666{
3667}
3668
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003669static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
3670{
3671 struct vcpu_svm *svm = to_svm(vcpu);
3672
Joerg Roedel20307532010-11-29 17:51:48 +01003673 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
Joerg Roedel88ab24a2010-02-19 16:23:06 +01003674 return;
3675
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003676 if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003677 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
Gleb Natapov615d5192009-04-21 17:45:05 +03003678 kvm_set_cr8(vcpu, cr8);
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003679 }
3680}
3681
Joerg Roedel649d6862008-04-16 16:51:15 +02003682static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
3683{
3684 struct vcpu_svm *svm = to_svm(vcpu);
3685 u64 cr8;
3686
Joerg Roedel20307532010-11-29 17:51:48 +01003687 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
Joerg Roedel88ab24a2010-02-19 16:23:06 +01003688 return;
3689
Joerg Roedel649d6862008-04-16 16:51:15 +02003690 cr8 = kvm_get_cr8(vcpu);
3691 svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
3692 svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
3693}
3694
Gleb Natapov9222be12009-04-23 17:14:37 +03003695static void svm_complete_interrupts(struct vcpu_svm *svm)
3696{
3697 u8 vector;
3698 int type;
3699 u32 exitintinfo = svm->vmcb->control.exit_int_info;
Jan Kiszka66b71382010-02-23 17:47:56 +01003700 unsigned int3_injected = svm->int3_injected;
3701
3702 svm->int3_injected = 0;
Gleb Natapov9222be12009-04-23 17:14:37 +03003703
Avi Kivitybd3d1ec2011-02-03 15:29:52 +02003704 /*
3705 * If we've made progress since setting HF_IRET_MASK, we've
3706 * executed an IRET and can allow NMI injection.
3707 */
3708 if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
3709 && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
Gleb Natapov44c11432009-05-11 13:35:52 +03003710 svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
Avi Kivity3842d132010-07-27 12:30:24 +03003711 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3712 }
Gleb Natapov44c11432009-05-11 13:35:52 +03003713
Gleb Natapov9222be12009-04-23 17:14:37 +03003714 svm->vcpu.arch.nmi_injected = false;
3715 kvm_clear_exception_queue(&svm->vcpu);
3716 kvm_clear_interrupt_queue(&svm->vcpu);
3717
3718 if (!(exitintinfo & SVM_EXITINTINFO_VALID))
3719 return;
3720
Avi Kivity3842d132010-07-27 12:30:24 +03003721 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3722
Gleb Natapov9222be12009-04-23 17:14:37 +03003723 vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
3724 type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
3725
3726 switch (type) {
3727 case SVM_EXITINTINFO_TYPE_NMI:
3728 svm->vcpu.arch.nmi_injected = true;
3729 break;
3730 case SVM_EXITINTINFO_TYPE_EXEPT:
Jan Kiszka66b71382010-02-23 17:47:56 +01003731 /*
3732 * In case of software exceptions, do not reinject the vector,
3733 * but re-execute the instruction instead. Rewind RIP first
3734 * if we emulated INT3 before.
3735 */
3736 if (kvm_exception_is_soft(vector)) {
3737 if (vector == BP_VECTOR && int3_injected &&
3738 kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
3739 kvm_rip_write(&svm->vcpu,
3740 kvm_rip_read(&svm->vcpu) -
3741 int3_injected);
Alexander Graf219b65d2009-06-15 15:21:25 +02003742 break;
Jan Kiszka66b71382010-02-23 17:47:56 +01003743 }
Gleb Natapov9222be12009-04-23 17:14:37 +03003744 if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
3745 u32 err = svm->vmcb->control.exit_int_info_err;
Joerg Roedelce7ddec2010-04-22 12:33:13 +02003746 kvm_requeue_exception_e(&svm->vcpu, vector, err);
Gleb Natapov9222be12009-04-23 17:14:37 +03003747
3748 } else
Joerg Roedelce7ddec2010-04-22 12:33:13 +02003749 kvm_requeue_exception(&svm->vcpu, vector);
Gleb Natapov9222be12009-04-23 17:14:37 +03003750 break;
3751 case SVM_EXITINTINFO_TYPE_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003752 kvm_queue_interrupt(&svm->vcpu, vector, false);
Gleb Natapov9222be12009-04-23 17:14:37 +03003753 break;
3754 default:
3755 break;
3756 }
3757}
3758
Avi Kivityb463a6f2010-07-20 15:06:17 +03003759static void svm_cancel_injection(struct kvm_vcpu *vcpu)
3760{
3761 struct vcpu_svm *svm = to_svm(vcpu);
3762 struct vmcb_control_area *control = &svm->vmcb->control;
3763
3764 control->exit_int_info = control->event_inj;
3765 control->exit_int_info_err = control->event_inj_err;
3766 control->event_inj = 0;
3767 svm_complete_interrupts(svm);
3768}
3769
Avi Kivity851ba692009-08-24 11:10:17 +03003770static void svm_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003771{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003772 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivityd9e368d2007-06-07 19:18:30 +03003773
Joerg Roedel2041a062010-04-22 12:33:08 +02003774 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
3775 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
3776 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
3777
Joerg Roedelcd3ff652009-10-09 16:08:26 +02003778 /*
3779 * A vmexit emulation is required before the vcpu can be executed
3780 * again.
3781 */
3782 if (unlikely(svm->nested.exit_required))
3783 return;
3784
Rusty Russelle756fc62007-07-30 20:07:08 +10003785 pre_svm_run(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003786
Joerg Roedel649d6862008-04-16 16:51:15 +02003787 sync_lapic_to_cr8(vcpu);
3788
Joerg Roedelcda0ffd2009-08-07 11:49:45 +02003789 svm->vmcb->save.cr2 = vcpu->arch.cr2;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003790
Avi Kivity04d2cc72007-09-10 18:10:54 +03003791 clgi();
3792
3793 local_irq_enable();
Avi Kivity36241b82006-12-22 01:05:20 -08003794
Avi Kivity6aa8b732006-12-10 02:21:36 -08003795 asm volatile (
Avi Kivity74547662012-09-16 15:10:59 +03003796 "push %%" _ASM_BP "; \n\t"
3797 "mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
3798 "mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
3799 "mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
3800 "mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
3801 "mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
3802 "mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003803#ifdef CONFIG_X86_64
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003804 "mov %c[r8](%[svm]), %%r8 \n\t"
3805 "mov %c[r9](%[svm]), %%r9 \n\t"
3806 "mov %c[r10](%[svm]), %%r10 \n\t"
3807 "mov %c[r11](%[svm]), %%r11 \n\t"
3808 "mov %c[r12](%[svm]), %%r12 \n\t"
3809 "mov %c[r13](%[svm]), %%r13 \n\t"
3810 "mov %c[r14](%[svm]), %%r14 \n\t"
3811 "mov %c[r15](%[svm]), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003812#endif
3813
Avi Kivity6aa8b732006-12-10 02:21:36 -08003814 /* Enter guest mode */
Avi Kivity74547662012-09-16 15:10:59 +03003815 "push %%" _ASM_AX " \n\t"
3816 "mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003817 __ex(SVM_VMLOAD) "\n\t"
3818 __ex(SVM_VMRUN) "\n\t"
3819 __ex(SVM_VMSAVE) "\n\t"
Avi Kivity74547662012-09-16 15:10:59 +03003820 "pop %%" _ASM_AX " \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003821
3822 /* Save guest registers, load host registers */
Avi Kivity74547662012-09-16 15:10:59 +03003823 "mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
3824 "mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
3825 "mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
3826 "mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
3827 "mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
3828 "mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003829#ifdef CONFIG_X86_64
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003830 "mov %%r8, %c[r8](%[svm]) \n\t"
3831 "mov %%r9, %c[r9](%[svm]) \n\t"
3832 "mov %%r10, %c[r10](%[svm]) \n\t"
3833 "mov %%r11, %c[r11](%[svm]) \n\t"
3834 "mov %%r12, %c[r12](%[svm]) \n\t"
3835 "mov %%r13, %c[r13](%[svm]) \n\t"
3836 "mov %%r14, %c[r14](%[svm]) \n\t"
3837 "mov %%r15, %c[r15](%[svm]) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003838#endif
Avi Kivity74547662012-09-16 15:10:59 +03003839 "pop %%" _ASM_BP
Avi Kivity6aa8b732006-12-10 02:21:36 -08003840 :
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003841 : [svm]"a"(svm),
Avi Kivity6aa8b732006-12-10 02:21:36 -08003842 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003843 [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
3844 [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
3845 [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
3846 [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
3847 [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
3848 [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003849#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003850 , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
3851 [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
3852 [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
3853 [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
3854 [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
3855 [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
3856 [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
3857 [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
Avi Kivity6aa8b732006-12-10 02:21:36 -08003858#endif
Laurent Vivier54a08c02007-10-25 14:18:53 +02003859 : "cc", "memory"
3860#ifdef CONFIG_X86_64
Avi Kivity74547662012-09-16 15:10:59 +03003861 , "rbx", "rcx", "rdx", "rsi", "rdi"
Laurent Vivier54a08c02007-10-25 14:18:53 +02003862 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
Avi Kivity74547662012-09-16 15:10:59 +03003863#else
3864 , "ebx", "ecx", "edx", "esi", "edi"
Laurent Vivier54a08c02007-10-25 14:18:53 +02003865#endif
3866 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08003867
Avi Kivity82ca2d12010-10-21 12:20:34 +02003868#ifdef CONFIG_X86_64
3869 wrmsrl(MSR_GS_BASE, svm->host.gs_base);
3870#else
Avi Kivitydacccfd2010-10-21 12:20:33 +02003871 loadsegment(fs, svm->host.fs);
Avi Kivity831ca602011-03-08 16:09:51 +02003872#ifndef CONFIG_X86_32_LAZY_GS
3873 loadsegment(gs, svm->host.gs);
3874#endif
Avi Kivity9581d442010-10-19 16:46:55 +02003875#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08003876
3877 reload_tss(vcpu);
3878
Avi Kivity56ba47d2007-11-07 17:14:18 +02003879 local_irq_disable();
3880
Avi Kivity13c34e02010-10-21 12:20:31 +02003881 vcpu->arch.cr2 = svm->vmcb->save.cr2;
3882 vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
3883 vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
3884 vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
3885
Jan Kiszka1e2b1dd2011-09-12 10:52:24 +02003886 trace_kvm_exit(svm->vmcb->control.exit_code, vcpu, KVM_ISA_SVM);
3887
Joerg Roedel3781c012011-01-14 16:45:02 +01003888 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
3889 kvm_before_handle_nmi(&svm->vcpu);
3890
3891 stgi();
3892
3893 /* Any pending NMI will happen here */
3894
3895 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
3896 kvm_after_handle_nmi(&svm->vcpu);
3897
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003898 sync_cr8_to_lapic(vcpu);
3899
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003900 svm->next_rip = 0;
Gleb Natapov9222be12009-04-23 17:14:37 +03003901
Joerg Roedel38e5e922010-12-03 15:25:16 +01003902 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
3903
Gleb Natapov631bc482010-10-14 11:22:52 +02003904 /* if exit due to PF check for async PF */
3905 if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
3906 svm->apf_reason = kvm_read_and_reset_pf_reason();
3907
Avi Kivity6de4f3a2009-05-31 22:58:47 +03003908 if (npt_enabled) {
3909 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
3910 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
3911 }
Joerg Roedelfe5913e2010-05-17 14:43:34 +02003912
3913 /*
3914 * We need to handle MC intercepts here before the vcpu has a chance to
3915 * change the physical cpu
3916 */
3917 if (unlikely(svm->vmcb->control.exit_code ==
3918 SVM_EXIT_EXCP_BASE + MC_VECTOR))
3919 svm_handle_mce(svm);
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01003920
3921 mark_all_clean(svm->vmcb);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003922}
3923
Avi Kivity6aa8b732006-12-10 02:21:36 -08003924static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
3925{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003926 struct vcpu_svm *svm = to_svm(vcpu);
3927
3928 svm->vmcb->save.cr3 = root;
Joerg Roedeldcca1a62010-12-03 11:45:54 +01003929 mark_dirty(svm->vmcb, VMCB_CR);
Joerg Roedelf40f6a42010-12-03 15:25:15 +01003930 svm_flush_tlb(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003931}
3932
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02003933static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
3934{
3935 struct vcpu_svm *svm = to_svm(vcpu);
3936
3937 svm->vmcb->control.nested_cr3 = root;
Joerg Roedelb2747162010-12-03 11:45:53 +01003938 mark_dirty(svm->vmcb, VMCB_NPT);
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02003939
3940 /* Also sync guest cr3 here in case we live migrate */
Avi Kivity9f8fe502010-12-05 17:30:00 +02003941 svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
Joerg Roedeldcca1a62010-12-03 11:45:54 +01003942 mark_dirty(svm->vmcb, VMCB_CR);
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02003943
Joerg Roedelf40f6a42010-12-03 15:25:15 +01003944 svm_flush_tlb(vcpu);
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02003945}
3946
Avi Kivity6aa8b732006-12-10 02:21:36 -08003947static int is_disabled(void)
3948{
Joerg Roedel6031a612007-06-22 12:29:50 +03003949 u64 vm_cr;
3950
3951 rdmsrl(MSR_VM_CR, vm_cr);
3952 if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
3953 return 1;
3954
Avi Kivity6aa8b732006-12-10 02:21:36 -08003955 return 0;
3956}
3957
Ingo Molnar102d8322007-02-19 14:37:47 +02003958static void
3959svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
3960{
3961 /*
3962 * Patch in the VMMCALL instruction:
3963 */
3964 hypercall[0] = 0x0f;
3965 hypercall[1] = 0x01;
3966 hypercall[2] = 0xd9;
Ingo Molnar102d8322007-02-19 14:37:47 +02003967}
3968
Yang, Sheng002c7f72007-07-31 14:23:01 +03003969static void svm_check_processor_compat(void *rtn)
3970{
3971 *(int *)rtn = 0;
3972}
3973
Avi Kivity774ead32007-12-26 13:57:04 +02003974static bool svm_cpu_has_accelerated_tpr(void)
3975{
3976 return false;
3977}
3978
Sheng Yang4b12f0d2009-04-27 20:35:42 +08003979static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08003980{
3981 return 0;
3982}
3983
Sheng Yang0e851882009-12-18 16:48:46 +08003984static void svm_cpuid_update(struct kvm_vcpu *vcpu)
3985{
3986}
3987
Joerg Roedeld4330ef2010-04-22 12:33:11 +02003988static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
3989{
Joerg Roedelc2c63a42010-04-22 12:33:12 +02003990 switch (func) {
Joerg Roedel4c62a2d2010-09-10 17:31:06 +02003991 case 0x80000001:
3992 if (nested)
3993 entry->ecx |= (1 << 2); /* Set SVM bit */
3994 break;
Joerg Roedelc2c63a42010-04-22 12:33:12 +02003995 case 0x8000000A:
3996 entry->eax = 1; /* SVM revision 1 */
3997 entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
3998 ASID emulation to nested SVM */
3999 entry->ecx = 0; /* Reserved */
Joerg Roedel7a190662010-07-27 18:14:21 +02004000 entry->edx = 0; /* Per default do not support any
4001 additional features */
4002
4003 /* Support next_rip if host supports it */
Avi Kivity2a6b20b2010-11-09 16:15:42 +02004004 if (boot_cpu_has(X86_FEATURE_NRIPS))
Joerg Roedel7a190662010-07-27 18:14:21 +02004005 entry->edx |= SVM_FEATURE_NRIP;
Joerg Roedelc2c63a42010-04-22 12:33:12 +02004006
Joerg Roedel3d4aeaa2010-09-10 17:31:05 +02004007 /* Support NPT for the guest if enabled */
4008 if (npt_enabled)
4009 entry->edx |= SVM_FEATURE_NPT;
4010
Joerg Roedelc2c63a42010-04-22 12:33:12 +02004011 break;
4012 }
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004013}
4014
Sheng Yang17cc3932010-01-05 19:02:27 +08004015static int svm_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02004016{
Sheng Yang17cc3932010-01-05 19:02:27 +08004017 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02004018}
4019
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004020static bool svm_rdtscp_supported(void)
4021{
4022 return false;
4023}
4024
Mao, Junjiead756a12012-07-02 01:18:48 +00004025static bool svm_invpcid_supported(void)
4026{
4027 return false;
4028}
4029
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004030static bool svm_has_wbinvd_exit(void)
4031{
4032 return true;
4033}
4034
Avi Kivity02daab22009-12-30 12:40:26 +02004035static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
4036{
4037 struct vcpu_svm *svm = to_svm(vcpu);
4038
Joerg Roedel18c918c2010-11-30 18:03:59 +01004039 set_exception_intercept(svm, NM_VECTOR);
Joerg Roedel66a562f2010-02-19 16:23:08 +01004040 update_cr0_intercept(svm);
Avi Kivity02daab22009-12-30 12:40:26 +02004041}
4042
Joerg Roedel80612522011-04-04 12:39:33 +02004043#define PRE_EX(exit) { .exit_code = (exit), \
Avi Kivity40e19b52011-04-21 12:35:41 +03004044 .stage = X86_ICPT_PRE_EXCEPT, }
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004045#define POST_EX(exit) { .exit_code = (exit), \
Avi Kivity40e19b52011-04-21 12:35:41 +03004046 .stage = X86_ICPT_POST_EXCEPT, }
Joerg Roedeld7eb8202011-04-04 12:39:32 +02004047#define POST_MEM(exit) { .exit_code = (exit), \
Avi Kivity40e19b52011-04-21 12:35:41 +03004048 .stage = X86_ICPT_POST_MEMACCESS, }
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004049
Mathias Krause09941fb2012-08-30 01:30:20 +02004050static const struct __x86_intercept {
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004051 u32 exit_code;
4052 enum x86_intercept_stage stage;
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004053} x86_intercept_map[] = {
4054 [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0),
4055 [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0),
4056 [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0),
4057 [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0),
4058 [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0),
Joerg Roedel3b88e412011-04-04 12:39:29 +02004059 [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0),
4060 [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0),
Joerg Roedeldee6bb72011-04-04 12:39:30 +02004061 [x86_intercept_sldt] = POST_EX(SVM_EXIT_LDTR_READ),
4062 [x86_intercept_str] = POST_EX(SVM_EXIT_TR_READ),
4063 [x86_intercept_lldt] = POST_EX(SVM_EXIT_LDTR_WRITE),
4064 [x86_intercept_ltr] = POST_EX(SVM_EXIT_TR_WRITE),
4065 [x86_intercept_sgdt] = POST_EX(SVM_EXIT_GDTR_READ),
4066 [x86_intercept_sidt] = POST_EX(SVM_EXIT_IDTR_READ),
4067 [x86_intercept_lgdt] = POST_EX(SVM_EXIT_GDTR_WRITE),
4068 [x86_intercept_lidt] = POST_EX(SVM_EXIT_IDTR_WRITE),
Joerg Roedel01de8b02011-04-04 12:39:31 +02004069 [x86_intercept_vmrun] = POST_EX(SVM_EXIT_VMRUN),
4070 [x86_intercept_vmmcall] = POST_EX(SVM_EXIT_VMMCALL),
4071 [x86_intercept_vmload] = POST_EX(SVM_EXIT_VMLOAD),
4072 [x86_intercept_vmsave] = POST_EX(SVM_EXIT_VMSAVE),
4073 [x86_intercept_stgi] = POST_EX(SVM_EXIT_STGI),
4074 [x86_intercept_clgi] = POST_EX(SVM_EXIT_CLGI),
4075 [x86_intercept_skinit] = POST_EX(SVM_EXIT_SKINIT),
4076 [x86_intercept_invlpga] = POST_EX(SVM_EXIT_INVLPGA),
Joerg Roedeld7eb8202011-04-04 12:39:32 +02004077 [x86_intercept_rdtscp] = POST_EX(SVM_EXIT_RDTSCP),
4078 [x86_intercept_monitor] = POST_MEM(SVM_EXIT_MONITOR),
4079 [x86_intercept_mwait] = POST_EX(SVM_EXIT_MWAIT),
Joerg Roedel80612522011-04-04 12:39:33 +02004080 [x86_intercept_invlpg] = POST_EX(SVM_EXIT_INVLPG),
4081 [x86_intercept_invd] = POST_EX(SVM_EXIT_INVD),
4082 [x86_intercept_wbinvd] = POST_EX(SVM_EXIT_WBINVD),
4083 [x86_intercept_wrmsr] = POST_EX(SVM_EXIT_MSR),
4084 [x86_intercept_rdtsc] = POST_EX(SVM_EXIT_RDTSC),
4085 [x86_intercept_rdmsr] = POST_EX(SVM_EXIT_MSR),
4086 [x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC),
4087 [x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID),
4088 [x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM),
Joerg Roedelbf608f82011-04-04 12:39:34 +02004089 [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE),
4090 [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF),
4091 [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF),
4092 [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT),
4093 [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET),
4094 [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP),
4095 [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT),
Joerg Roedelf6511932011-04-04 12:39:35 +02004096 [x86_intercept_in] = POST_EX(SVM_EXIT_IOIO),
4097 [x86_intercept_ins] = POST_EX(SVM_EXIT_IOIO),
4098 [x86_intercept_out] = POST_EX(SVM_EXIT_IOIO),
4099 [x86_intercept_outs] = POST_EX(SVM_EXIT_IOIO),
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004100};
4101
Joerg Roedel80612522011-04-04 12:39:33 +02004102#undef PRE_EX
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004103#undef POST_EX
Joerg Roedeld7eb8202011-04-04 12:39:32 +02004104#undef POST_MEM
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004105
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004106static int svm_check_intercept(struct kvm_vcpu *vcpu,
4107 struct x86_instruction_info *info,
4108 enum x86_intercept_stage stage)
4109{
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004110 struct vcpu_svm *svm = to_svm(vcpu);
4111 int vmexit, ret = X86EMUL_CONTINUE;
4112 struct __x86_intercept icpt_info;
4113 struct vmcb *vmcb = svm->vmcb;
4114
4115 if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
4116 goto out;
4117
4118 icpt_info = x86_intercept_map[info->intercept];
4119
Avi Kivity40e19b52011-04-21 12:35:41 +03004120 if (stage != icpt_info.stage)
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004121 goto out;
4122
4123 switch (icpt_info.exit_code) {
4124 case SVM_EXIT_READ_CR0:
4125 if (info->intercept == x86_intercept_cr_read)
4126 icpt_info.exit_code += info->modrm_reg;
4127 break;
4128 case SVM_EXIT_WRITE_CR0: {
4129 unsigned long cr0, val;
4130 u64 intercept;
4131
4132 if (info->intercept == x86_intercept_cr_write)
4133 icpt_info.exit_code += info->modrm_reg;
4134
4135 if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0)
4136 break;
4137
4138 intercept = svm->nested.intercept;
4139
4140 if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
4141 break;
4142
4143 cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
4144 val = info->src_val & ~SVM_CR0_SELECTIVE_MASK;
4145
4146 if (info->intercept == x86_intercept_lmsw) {
4147 cr0 &= 0xfUL;
4148 val &= 0xfUL;
4149 /* lmsw can't clear PE - catch this here */
4150 if (cr0 & X86_CR0_PE)
4151 val |= X86_CR0_PE;
4152 }
4153
4154 if (cr0 ^ val)
4155 icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;
4156
4157 break;
4158 }
Joerg Roedel3b88e412011-04-04 12:39:29 +02004159 case SVM_EXIT_READ_DR0:
4160 case SVM_EXIT_WRITE_DR0:
4161 icpt_info.exit_code += info->modrm_reg;
4162 break;
Joerg Roedel80612522011-04-04 12:39:33 +02004163 case SVM_EXIT_MSR:
4164 if (info->intercept == x86_intercept_wrmsr)
4165 vmcb->control.exit_info_1 = 1;
4166 else
4167 vmcb->control.exit_info_1 = 0;
4168 break;
Joerg Roedelbf608f82011-04-04 12:39:34 +02004169 case SVM_EXIT_PAUSE:
4170 /*
4171 * We get this for NOP only, but pause
4172 * is rep not, check this here
4173 */
4174 if (info->rep_prefix != REPE_PREFIX)
4175 goto out;
Joerg Roedelf6511932011-04-04 12:39:35 +02004176 case SVM_EXIT_IOIO: {
4177 u64 exit_info;
4178 u32 bytes;
4179
4180 exit_info = (vcpu->arch.regs[VCPU_REGS_RDX] & 0xffff) << 16;
4181
4182 if (info->intercept == x86_intercept_in ||
4183 info->intercept == x86_intercept_ins) {
4184 exit_info |= SVM_IOIO_TYPE_MASK;
4185 bytes = info->src_bytes;
4186 } else {
4187 bytes = info->dst_bytes;
4188 }
4189
4190 if (info->intercept == x86_intercept_outs ||
4191 info->intercept == x86_intercept_ins)
4192 exit_info |= SVM_IOIO_STR_MASK;
4193
4194 if (info->rep_prefix)
4195 exit_info |= SVM_IOIO_REP_MASK;
4196
4197 bytes = min(bytes, 4u);
4198
4199 exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;
4200
4201 exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);
4202
4203 vmcb->control.exit_info_1 = exit_info;
4204 vmcb->control.exit_info_2 = info->next_rip;
4205
4206 break;
4207 }
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004208 default:
4209 break;
4210 }
4211
4212 vmcb->control.next_rip = info->next_rip;
4213 vmcb->control.exit_code = icpt_info.exit_code;
4214 vmexit = nested_svm_exit_handled(svm);
4215
4216 ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
4217 : X86EMUL_CONTINUE;
4218
4219out:
4220 return ret;
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004221}
4222
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03004223static struct kvm_x86_ops svm_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004224 .cpu_has_kvm_support = has_svm,
4225 .disabled_by_bios = is_disabled,
4226 .hardware_setup = svm_hardware_setup,
4227 .hardware_unsetup = svm_hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03004228 .check_processor_compatibility = svm_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004229 .hardware_enable = svm_hardware_enable,
4230 .hardware_disable = svm_hardware_disable,
Avi Kivity774ead32007-12-26 13:57:04 +02004231 .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004232
4233 .vcpu_create = svm_create_vcpu,
4234 .vcpu_free = svm_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004235 .vcpu_reset = svm_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004236
Avi Kivity04d2cc72007-09-10 18:10:54 +03004237 .prepare_guest_switch = svm_prepare_guest_switch,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004238 .vcpu_load = svm_vcpu_load,
4239 .vcpu_put = svm_vcpu_put,
4240
Jan Kiszkac8639012012-09-21 05:42:55 +02004241 .update_db_bp_intercept = update_db_bp_intercept,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004242 .get_msr = svm_get_msr,
4243 .set_msr = svm_set_msr,
4244 .get_segment_base = svm_get_segment_base,
4245 .get_segment = svm_get_segment,
4246 .set_segment = svm_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02004247 .get_cpl = svm_get_cpl,
Rusty Russell1747fb72007-09-06 01:21:32 +10004248 .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02004249 .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
Avi Kivityaff48ba2010-12-05 18:56:11 +02004250 .decache_cr3 = svm_decache_cr3,
Anthony Liguori25c4c272007-04-27 09:29:21 +03004251 .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004252 .set_cr0 = svm_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004253 .set_cr3 = svm_set_cr3,
4254 .set_cr4 = svm_set_cr4,
4255 .set_efer = svm_set_efer,
4256 .get_idt = svm_get_idt,
4257 .set_idt = svm_set_idt,
4258 .get_gdt = svm_get_gdt,
4259 .set_gdt = svm_set_gdt,
Gleb Natapov020df072010-04-13 10:05:23 +03004260 .set_dr7 = svm_set_dr7,
Avi Kivity6de4f3a2009-05-31 22:58:47 +03004261 .cache_reg = svm_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004262 .get_rflags = svm_get_rflags,
4263 .set_rflags = svm_set_rflags,
Avi Kivity6b52d182010-01-21 15:31:47 +02004264 .fpu_activate = svm_fpu_activate,
Avi Kivity02daab22009-12-30 12:40:26 +02004265 .fpu_deactivate = svm_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004266
Avi Kivity6aa8b732006-12-10 02:21:36 -08004267 .tlb_flush = svm_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004268
Avi Kivity6aa8b732006-12-10 02:21:36 -08004269 .run = svm_vcpu_run,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004270 .handle_exit = handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004271 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04004272 .set_interrupt_shadow = svm_set_interrupt_shadow,
4273 .get_interrupt_shadow = svm_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02004274 .patch_hypercall = svm_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03004275 .set_irq = svm_set_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004276 .set_nmi = svm_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02004277 .queue_exception = svm_queue_exception,
Avi Kivityb463a6f2010-07-20 15:06:17 +03004278 .cancel_injection = svm_cancel_injection,
Gleb Natapov78646122009-03-23 12:12:11 +02004279 .interrupt_allowed = svm_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004280 .nmi_allowed = svm_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01004281 .get_nmi_mask = svm_get_nmi_mask,
4282 .set_nmi_mask = svm_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004283 .enable_nmi_window = enable_nmi_window,
4284 .enable_irq_window = enable_irq_window,
4285 .update_cr8_intercept = update_cr8_intercept,
Izik Eiduscbc94022007-10-25 00:29:55 +02004286
4287 .set_tss_addr = svm_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08004288 .get_tdp_level = get_npt_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004289 .get_mt_mask = svm_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004290
Avi Kivity586f9602010-11-18 13:09:54 +02004291 .get_exit_info = svm_get_exit_info,
Avi Kivity586f9602010-11-18 13:09:54 +02004292
Sheng Yang17cc3932010-01-05 19:02:27 +08004293 .get_lpage_level = svm_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08004294
4295 .cpuid_update = svm_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004296
4297 .rdtscp_supported = svm_rdtscp_supported,
Mao, Junjiead756a12012-07-02 01:18:48 +00004298 .invpcid_supported = svm_invpcid_supported,
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004299
4300 .set_supported_cpuid = svm_set_supported_cpuid,
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004301
4302 .has_wbinvd_exit = svm_has_wbinvd_exit,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004303
Joerg Roedel4051b182011-03-25 09:44:49 +01004304 .set_tsc_khz = svm_set_tsc_khz,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004305 .write_tsc_offset = svm_write_tsc_offset,
Zachary Amsdene48672f2010-08-19 22:07:23 -10004306 .adjust_tsc_offset = svm_adjust_tsc_offset,
Joerg Roedel857e4092011-03-25 09:44:50 +01004307 .compute_tsc_offset = svm_compute_tsc_offset,
Nadav Har'Eld5c17852011-08-02 15:54:20 +03004308 .read_l1_tsc = svm_read_l1_tsc,
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004309
4310 .set_tdp_cr3 = set_tdp_cr3,
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004311
4312 .check_intercept = svm_check_intercept,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004313};
4314
4315static int __init svm_init(void)
4316{
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004317 return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
Avi Kivity0ee75be2010-04-28 15:39:01 +03004318 __alignof__(struct vcpu_svm), THIS_MODULE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004319}
4320
4321static void __exit svm_exit(void)
4322{
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004323 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08004324}
4325
4326module_init(svm_init)
4327module_exit(svm_exit)