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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"
Julian Stecklina66f7b722012-12-05 15:26:19 +010023#include "cpuid.h"
Avi Kivitye4956062007-06-28 14:15:57 -040024
Avi Kivity6aa8b732006-12-10 02:21:36 -080025#include <linux/module.h>
Josh Triplettae759542012-03-28 11:32:28 -070026#include <linux/mod_devicetable.h>
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +020027#include <linux/kernel.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080028#include <linux/vmalloc.h>
29#include <linux/highmem.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040030#include <linux/sched.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030031#include <linux/ftrace_event.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090032#include <linux/slab.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080033
Joerg Roedel1018faa2012-02-29 14:57:32 +010034#include <asm/perf_event.h>
Joerg Roedel67ec6602010-05-17 14:43:35 +020035#include <asm/tlbflush.h>
Avi Kivitye4956062007-06-28 14:15:57 -040036#include <asm/desc.h>
Paolo Bonzinifacb0132014-02-21 10:32:27 +010037#include <asm/debugreg.h>
Gleb Natapov631bc482010-10-14 11:22:52 +020038#include <asm/kvm_para.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080039
Eduardo Habkost63d11422008-11-17 19:03:20 -020040#include <asm/virtext.h>
Marcelo Tosatti229456f2009-06-17 09:22:14 -030041#include "trace.h"
Eduardo Habkost63d11422008-11-17 19:03:20 -020042
Avi Kivity4ecac3f2008-05-13 13:23:38 +030043#define __ex(x) __kvm_handle_fault_on_reboot(x)
44
Avi Kivity6aa8b732006-12-10 02:21:36 -080045MODULE_AUTHOR("Qumranet");
46MODULE_LICENSE("GPL");
47
Josh Triplettae759542012-03-28 11:32:28 -070048static const struct x86_cpu_id svm_cpu_id[] = {
49 X86_FEATURE_MATCH(X86_FEATURE_SVM),
50 {}
51};
52MODULE_DEVICE_TABLE(x86cpu, svm_cpu_id);
53
Avi Kivity6aa8b732006-12-10 02:21:36 -080054#define IOPM_ALLOC_ORDER 2
55#define MSRPM_ALLOC_ORDER 1
56
Avi Kivity6aa8b732006-12-10 02:21:36 -080057#define SEG_TYPE_LDT 2
58#define SEG_TYPE_BUSY_TSS16 3
59
Andre Przywara6bc31bd2010-04-11 23:07:28 +020060#define SVM_FEATURE_NPT (1 << 0)
61#define SVM_FEATURE_LBRV (1 << 1)
62#define SVM_FEATURE_SVML (1 << 2)
63#define SVM_FEATURE_NRIP (1 << 3)
Andre Przywaraddce97a2010-12-21 11:12:03 +010064#define SVM_FEATURE_TSC_RATE (1 << 4)
65#define SVM_FEATURE_VMCB_CLEAN (1 << 5)
66#define SVM_FEATURE_FLUSH_ASID (1 << 6)
67#define SVM_FEATURE_DECODE_ASSIST (1 << 7)
Andre Przywara6bc31bd2010-04-11 23:07:28 +020068#define SVM_FEATURE_PAUSE_FILTER (1 << 10)
Joerg Roedel80b77062007-03-30 17:02:14 +030069
Joerg Roedel410e4d52009-08-07 11:49:44 +020070#define NESTED_EXIT_HOST 0 /* Exit handled on host level */
71#define NESTED_EXIT_DONE 1 /* Exit caused nested vmexit */
72#define NESTED_EXIT_CONTINUE 2 /* Further checks needed */
73
Joerg Roedel24e09cb2008-02-13 18:58:47 +010074#define DEBUGCTL_RESERVED_BITS (~(0x3fULL))
75
Joerg Roedelfbc0db72011-03-25 09:44:46 +010076#define TSC_RATIO_RSVD 0xffffff0000000000ULL
Joerg Roedel92a1f122011-03-25 09:44:51 +010077#define TSC_RATIO_MIN 0x0000000000000001ULL
78#define TSC_RATIO_MAX 0x000000ffffffffffULL
Joerg Roedelfbc0db72011-03-25 09:44:46 +010079
Joerg Roedel67ec6602010-05-17 14:43:35 +020080static bool erratum_383_found __read_mostly;
81
Avi Kivity6c8166a2009-05-31 18:15:37 +030082static const u32 host_save_user_msrs[] = {
83#ifdef CONFIG_X86_64
84 MSR_STAR, MSR_LSTAR, MSR_CSTAR, MSR_SYSCALL_MASK, MSR_KERNEL_GS_BASE,
85 MSR_FS_BASE,
86#endif
87 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
88};
89
90#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
91
92struct kvm_vcpu;
93
Joerg Roedele6aa9ab2009-08-07 11:49:33 +020094struct nested_state {
95 struct vmcb *hsave;
96 u64 hsave_msr;
Joerg Roedel4a810182010-02-24 18:59:15 +010097 u64 vm_cr_msr;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +020098 u64 vmcb;
99
100 /* These are the merged vectors */
101 u32 *msrpm;
102
103 /* gpa pointers to the real vectors */
104 u64 vmcb_msrpm;
Joerg Roedelce2ac082010-03-01 15:34:39 +0100105 u64 vmcb_iopm;
Joerg Roedelaad42c62009-08-07 11:49:34 +0200106
Joerg Roedelcd3ff652009-10-09 16:08:26 +0200107 /* A VMEXIT is required but not yet emulated */
108 bool exit_required;
109
Joerg Roedelaad42c62009-08-07 11:49:34 +0200110 /* cache for intercepts of the guest */
Roedel, Joerg4ee546b2010-12-03 10:50:51 +0100111 u32 intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +0100112 u32 intercept_dr;
Joerg Roedelaad42c62009-08-07 11:49:34 +0200113 u32 intercept_exceptions;
114 u64 intercept;
115
Joerg Roedel5bd2edc2010-09-10 17:31:02 +0200116 /* Nested Paging related state */
117 u64 nested_cr3;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200118};
119
Joerg Roedel323c3d82010-03-01 15:34:37 +0100120#define MSRPM_OFFSETS 16
121static u32 msrpm_offsets[MSRPM_OFFSETS] __read_mostly;
122
Boris Ostrovsky2b036c62012-01-09 14:00:35 -0500123/*
124 * Set osvw_len to higher value when updated Revision Guides
125 * are published and we know what the new status bits are
126 */
127static uint64_t osvw_len = 4, osvw_status;
128
Avi Kivity6c8166a2009-05-31 18:15:37 +0300129struct vcpu_svm {
130 struct kvm_vcpu vcpu;
131 struct vmcb *vmcb;
132 unsigned long vmcb_pa;
133 struct svm_cpu_data *svm_data;
134 uint64_t asid_generation;
135 uint64_t sysenter_esp;
136 uint64_t sysenter_eip;
137
138 u64 next_rip;
139
140 u64 host_user_msrs[NR_HOST_SAVE_USER_MSRS];
Avi Kivityafe9e662010-10-21 12:20:32 +0200141 struct {
Avi Kivitydacccfd2010-10-21 12:20:33 +0200142 u16 fs;
143 u16 gs;
144 u16 ldt;
Avi Kivityafe9e662010-10-21 12:20:32 +0200145 u64 gs_base;
146 } host;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300147
148 u32 *msrpm;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300149
Avi Kivitybd3d1ec2011-02-03 15:29:52 +0200150 ulong nmi_iret_rip;
151
Joerg Roedele6aa9ab2009-08-07 11:49:33 +0200152 struct nested_state nested;
Jan Kiszka6be7d302009-10-18 13:24:54 +0200153
154 bool nmi_singlestep;
Jan Kiszka66b71382010-02-23 17:47:56 +0100155
156 unsigned int3_injected;
157 unsigned long int3_rip;
Gleb Natapov631bc482010-10-14 11:22:52 +0200158 u32 apf_reason;
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100159
160 u64 tsc_ratio;
Avi Kivity6c8166a2009-05-31 18:15:37 +0300161};
162
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100163static DEFINE_PER_CPU(u64, current_tsc_ratio);
164#define TSC_RATIO_DEFAULT 0x0100000000ULL
165
Joerg Roedel455716f2010-03-01 15:34:35 +0100166#define MSR_INVALID 0xffffffffU
167
Mathias Krause09941fb2012-08-30 01:30:20 +0200168static const struct svm_direct_access_msrs {
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100169 u32 index; /* Index of the MSR */
170 bool always; /* True if intercept is always on */
171} direct_access_msrs[] = {
Brian Gerst8c065852010-07-17 09:03:26 -0400172 { .index = MSR_STAR, .always = true },
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100173 { .index = MSR_IA32_SYSENTER_CS, .always = true },
174#ifdef CONFIG_X86_64
175 { .index = MSR_GS_BASE, .always = true },
176 { .index = MSR_FS_BASE, .always = true },
177 { .index = MSR_KERNEL_GS_BASE, .always = true },
178 { .index = MSR_LSTAR, .always = true },
179 { .index = MSR_CSTAR, .always = true },
180 { .index = MSR_SYSCALL_MASK, .always = true },
181#endif
182 { .index = MSR_IA32_LASTBRANCHFROMIP, .always = false },
183 { .index = MSR_IA32_LASTBRANCHTOIP, .always = false },
184 { .index = MSR_IA32_LASTINTFROMIP, .always = false },
185 { .index = MSR_IA32_LASTINTTOIP, .always = false },
186 { .index = MSR_INVALID, .always = false },
Avi Kivity6aa8b732006-12-10 02:21:36 -0800187};
188
189/* enable NPT for AMD64 and X86 with PAE */
190#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
191static bool npt_enabled = true;
192#else
Joerg Roedele0231712010-02-24 18:59:10 +0100193static bool npt_enabled;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800194#endif
195
Davidlohr Buesoe2358852012-01-17 14:09:50 +0100196/* allow nested paging (virtualized MMU) for all guests */
197static int npt = true;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800198module_param(npt, int, S_IRUGO);
199
Davidlohr Buesoe2358852012-01-17 14:09:50 +0100200/* allow nested virtualization in KVM/SVM */
201static int nested = true;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800202module_param(nested, int, S_IRUGO);
203
204static void svm_flush_tlb(struct kvm_vcpu *vcpu);
Joerg Roedela5c38322009-08-07 11:49:32 +0200205static void svm_complete_interrupts(struct vcpu_svm *svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800206
Joerg Roedel410e4d52009-08-07 11:49:44 +0200207static int nested_svm_exit_handled(struct vcpu_svm *svm);
Joerg Roedelb8e88bc2010-02-19 16:23:02 +0100208static int nested_svm_intercept(struct vcpu_svm *svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800209static int nested_svm_vmexit(struct vcpu_svm *svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800210static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
211 bool has_error_code, u32 error_code);
Joerg Roedel92a1f122011-03-25 09:44:51 +0100212static u64 __scale_tsc(u64 ratio, u64 tsc);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800213
Roedel, Joerg8d28fec2010-12-03 13:15:21 +0100214enum {
Joerg Roedel116a0a22010-12-03 11:45:49 +0100215 VMCB_INTERCEPTS, /* Intercept vectors, TSC offset,
216 pause filter count */
Joerg Roedelf56838e2010-12-03 11:45:50 +0100217 VMCB_PERM_MAP, /* IOPM Base and MSRPM Base */
Joerg Roedeld48086d2010-12-03 11:45:51 +0100218 VMCB_ASID, /* ASID */
Joerg Roedeldecdbf62010-12-03 11:45:52 +0100219 VMCB_INTR, /* int_ctl, int_vector */
Joerg Roedelb2747162010-12-03 11:45:53 +0100220 VMCB_NPT, /* npt_en, nCR3, gPAT */
Joerg Roedeldcca1a62010-12-03 11:45:54 +0100221 VMCB_CR, /* CR0, CR3, CR4, EFER */
Joerg Roedel72214b92010-12-03 11:45:55 +0100222 VMCB_DR, /* DR6, DR7 */
Joerg Roedel17a703c2010-12-03 11:45:56 +0100223 VMCB_DT, /* GDT, IDT */
Joerg Roedel060d0c92010-12-03 11:45:57 +0100224 VMCB_SEG, /* CS, DS, SS, ES, CPL */
Joerg Roedel0574dec2010-12-03 11:45:58 +0100225 VMCB_CR2, /* CR2 only */
Joerg Roedelb53ba3f2010-12-03 11:45:59 +0100226 VMCB_LBR, /* DBGCTL, BR_FROM, BR_TO, LAST_EX_FROM, LAST_EX_TO */
Roedel, Joerg8d28fec2010-12-03 13:15:21 +0100227 VMCB_DIRTY_MAX,
228};
229
Joerg Roedel0574dec2010-12-03 11:45:58 +0100230/* TPR and CR2 are always written before VMRUN */
231#define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
Roedel, Joerg8d28fec2010-12-03 13:15:21 +0100232
233static inline void mark_all_dirty(struct vmcb *vmcb)
234{
235 vmcb->control.clean = 0;
236}
237
238static inline void mark_all_clean(struct vmcb *vmcb)
239{
240 vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
241 & ~VMCB_ALWAYS_DIRTY_MASK;
242}
243
244static inline void mark_dirty(struct vmcb *vmcb, int bit)
245{
246 vmcb->control.clean &= ~(1 << bit);
247}
248
Avi Kivity6aa8b732006-12-10 02:21:36 -0800249static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
250{
251 return container_of(vcpu, struct vcpu_svm, vcpu);
252}
253
Joerg Roedel384c6362010-11-30 18:03:56 +0100254static void recalc_intercepts(struct vcpu_svm *svm)
255{
256 struct vmcb_control_area *c, *h;
257 struct nested_state *g;
258
Joerg Roedel116a0a22010-12-03 11:45:49 +0100259 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
260
Joerg Roedel384c6362010-11-30 18:03:56 +0100261 if (!is_guest_mode(&svm->vcpu))
262 return;
263
264 c = &svm->vmcb->control;
265 h = &svm->nested.hsave->control;
266 g = &svm->nested;
267
Roedel, Joerg4ee546b2010-12-03 10:50:51 +0100268 c->intercept_cr = h->intercept_cr | g->intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +0100269 c->intercept_dr = h->intercept_dr | g->intercept_dr;
Joerg Roedel384c6362010-11-30 18:03:56 +0100270 c->intercept_exceptions = h->intercept_exceptions | g->intercept_exceptions;
271 c->intercept = h->intercept | g->intercept;
272}
273
Roedel, Joerg4ee546b2010-12-03 10:50:51 +0100274static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
275{
276 if (is_guest_mode(&svm->vcpu))
277 return svm->nested.hsave;
278 else
279 return svm->vmcb;
280}
281
282static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
283{
284 struct vmcb *vmcb = get_host_vmcb(svm);
285
286 vmcb->control.intercept_cr |= (1U << bit);
287
288 recalc_intercepts(svm);
289}
290
291static inline void clr_cr_intercept(struct vcpu_svm *svm, int bit)
292{
293 struct vmcb *vmcb = get_host_vmcb(svm);
294
295 vmcb->control.intercept_cr &= ~(1U << bit);
296
297 recalc_intercepts(svm);
298}
299
300static inline bool is_cr_intercept(struct vcpu_svm *svm, int bit)
301{
302 struct vmcb *vmcb = get_host_vmcb(svm);
303
304 return vmcb->control.intercept_cr & (1U << bit);
305}
306
Paolo Bonzini5315c712014-03-03 13:08:29 +0100307static inline void set_dr_intercepts(struct vcpu_svm *svm)
Joerg Roedel3aed0412010-11-30 18:03:58 +0100308{
309 struct vmcb *vmcb = get_host_vmcb(svm);
310
Paolo Bonzini5315c712014-03-03 13:08:29 +0100311 vmcb->control.intercept_dr = (1 << INTERCEPT_DR0_READ)
312 | (1 << INTERCEPT_DR1_READ)
313 | (1 << INTERCEPT_DR2_READ)
314 | (1 << INTERCEPT_DR3_READ)
315 | (1 << INTERCEPT_DR4_READ)
316 | (1 << INTERCEPT_DR5_READ)
317 | (1 << INTERCEPT_DR6_READ)
318 | (1 << INTERCEPT_DR7_READ)
319 | (1 << INTERCEPT_DR0_WRITE)
320 | (1 << INTERCEPT_DR1_WRITE)
321 | (1 << INTERCEPT_DR2_WRITE)
322 | (1 << INTERCEPT_DR3_WRITE)
323 | (1 << INTERCEPT_DR4_WRITE)
324 | (1 << INTERCEPT_DR5_WRITE)
325 | (1 << INTERCEPT_DR6_WRITE)
326 | (1 << INTERCEPT_DR7_WRITE);
Joerg Roedel3aed0412010-11-30 18:03:58 +0100327
328 recalc_intercepts(svm);
329}
330
Paolo Bonzini5315c712014-03-03 13:08:29 +0100331static inline void clr_dr_intercepts(struct vcpu_svm *svm)
Joerg Roedel3aed0412010-11-30 18:03:58 +0100332{
333 struct vmcb *vmcb = get_host_vmcb(svm);
334
Paolo Bonzini5315c712014-03-03 13:08:29 +0100335 vmcb->control.intercept_dr = 0;
Joerg Roedel3aed0412010-11-30 18:03:58 +0100336
337 recalc_intercepts(svm);
338}
339
Joerg Roedel18c918c2010-11-30 18:03:59 +0100340static inline void set_exception_intercept(struct vcpu_svm *svm, int bit)
341{
342 struct vmcb *vmcb = get_host_vmcb(svm);
343
344 vmcb->control.intercept_exceptions |= (1U << bit);
345
346 recalc_intercepts(svm);
347}
348
349static inline void clr_exception_intercept(struct vcpu_svm *svm, int bit)
350{
351 struct vmcb *vmcb = get_host_vmcb(svm);
352
353 vmcb->control.intercept_exceptions &= ~(1U << bit);
354
355 recalc_intercepts(svm);
356}
357
Joerg Roedel8a05a1b2010-11-30 18:04:00 +0100358static inline void set_intercept(struct vcpu_svm *svm, int bit)
359{
360 struct vmcb *vmcb = get_host_vmcb(svm);
361
362 vmcb->control.intercept |= (1ULL << bit);
363
364 recalc_intercepts(svm);
365}
366
367static inline void clr_intercept(struct vcpu_svm *svm, int bit)
368{
369 struct vmcb *vmcb = get_host_vmcb(svm);
370
371 vmcb->control.intercept &= ~(1ULL << bit);
372
373 recalc_intercepts(svm);
374}
375
Joerg Roedel2af91942009-08-07 11:49:28 +0200376static inline void enable_gif(struct vcpu_svm *svm)
377{
378 svm->vcpu.arch.hflags |= HF_GIF_MASK;
379}
380
381static inline void disable_gif(struct vcpu_svm *svm)
382{
383 svm->vcpu.arch.hflags &= ~HF_GIF_MASK;
384}
385
386static inline bool gif_set(struct vcpu_svm *svm)
387{
388 return !!(svm->vcpu.arch.hflags & HF_GIF_MASK);
389}
390
Avi Kivity6aa8b732006-12-10 02:21:36 -0800391static unsigned long iopm_base;
392
393struct kvm_ldttss_desc {
394 u16 limit0;
395 u16 base0;
Joerg Roedele0231712010-02-24 18:59:10 +0100396 unsigned base1:8, type:5, dpl:2, p:1;
397 unsigned limit1:4, zero0:3, g:1, base2:8;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800398 u32 base3;
399 u32 zero1;
400} __attribute__((packed));
401
402struct svm_cpu_data {
403 int cpu;
404
Avi Kivity5008fdf2007-04-02 13:05:50 +0300405 u64 asid_generation;
406 u32 max_asid;
407 u32 next_asid;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800408 struct kvm_ldttss_desc *tss_desc;
409
410 struct page *save_area;
411};
412
413static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
414
415struct svm_init_data {
416 int cpu;
417 int r;
418};
419
Mathias Krause09941fb2012-08-30 01:30:20 +0200420static const u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
Avi Kivity6aa8b732006-12-10 02:21:36 -0800421
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +0200422#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800423#define MSRS_RANGE_SIZE 2048
424#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
425
Joerg Roedel455716f2010-03-01 15:34:35 +0100426static u32 svm_msrpm_offset(u32 msr)
427{
428 u32 offset;
429 int i;
430
431 for (i = 0; i < NUM_MSR_MAPS; i++) {
432 if (msr < msrpm_ranges[i] ||
433 msr >= msrpm_ranges[i] + MSRS_IN_RANGE)
434 continue;
435
436 offset = (msr - msrpm_ranges[i]) / 4; /* 4 msrs per u8 */
437 offset += (i * MSRS_RANGE_SIZE); /* add range offset */
438
439 /* Now we have the u8 offset - but need the u32 offset */
440 return offset / 4;
441 }
442
443 /* MSR not in any range */
444 return MSR_INVALID;
445}
446
Avi Kivity6aa8b732006-12-10 02:21:36 -0800447#define MAX_INST_SIZE 15
448
Avi Kivity6aa8b732006-12-10 02:21:36 -0800449static inline void clgi(void)
450{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300451 asm volatile (__ex(SVM_CLGI));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800452}
453
454static inline void stgi(void)
455{
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300456 asm volatile (__ex(SVM_STGI));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800457}
458
459static inline void invlpga(unsigned long addr, u32 asid)
460{
Joerg Roedele0231712010-02-24 18:59:10 +0100461 asm volatile (__ex(SVM_INVLPGA) : : "a"(addr), "c"(asid));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800462}
463
Joerg Roedel4b161842010-09-10 17:31:03 +0200464static int get_npt_level(void)
465{
466#ifdef CONFIG_X86_64
467 return PT64_ROOT_LEVEL;
468#else
469 return PT32E_ROOT_LEVEL;
470#endif
471}
472
Avi Kivity6aa8b732006-12-10 02:21:36 -0800473static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
474{
Zachary Amsden6dc696d2010-05-26 15:09:43 -1000475 vcpu->arch.efer = efer;
Joerg Roedel709ddeb2008-02-07 13:47:45 +0100476 if (!npt_enabled && !(efer & EFER_LMA))
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -0600477 efer &= ~EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800478
Alexander Graf9962d032008-11-25 20:17:02 +0100479 to_svm(vcpu)->vmcb->save.efer = efer | EFER_SVME;
Joerg Roedeldcca1a62010-12-03 11:45:54 +0100480 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800481}
482
Avi Kivity6aa8b732006-12-10 02:21:36 -0800483static int is_external_interrupt(u32 info)
484{
485 info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
486 return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
487}
488
Paolo Bonzini37ccdcb2014-05-20 14:29:47 +0200489static u32 svm_get_interrupt_shadow(struct kvm_vcpu *vcpu)
Glauber Costa2809f5d2009-05-12 16:21:05 -0400490{
491 struct vcpu_svm *svm = to_svm(vcpu);
492 u32 ret = 0;
493
494 if (svm->vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK)
Paolo Bonzini37ccdcb2014-05-20 14:29:47 +0200495 ret = KVM_X86_SHADOW_INT_STI | KVM_X86_SHADOW_INT_MOV_SS;
496 return ret;
Glauber Costa2809f5d2009-05-12 16:21:05 -0400497}
498
499static void svm_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
500{
501 struct vcpu_svm *svm = to_svm(vcpu);
502
503 if (mask == 0)
504 svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
505 else
506 svm->vmcb->control.int_state |= SVM_INTERRUPT_SHADOW_MASK;
507
508}
509
Avi Kivity6aa8b732006-12-10 02:21:36 -0800510static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
511{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400512 struct vcpu_svm *svm = to_svm(vcpu);
513
Andre Przywara6bc31bd2010-04-11 23:07:28 +0200514 if (svm->vmcb->control.next_rip != 0)
515 svm->next_rip = svm->vmcb->control.next_rip;
516
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -0400517 if (!svm->next_rip) {
Andre Przywara51d8b662010-12-21 11:12:02 +0100518 if (emulate_instruction(vcpu, EMULTYPE_SKIP) !=
Gleb Natapovf629cf82009-05-11 13:35:49 +0300519 EMULATE_DONE)
520 printk(KERN_DEBUG "%s: NOP\n", __func__);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800521 return;
522 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300523 if (svm->next_rip - kvm_rip_read(vcpu) > MAX_INST_SIZE)
524 printk(KERN_ERR "%s: ip 0x%lx next 0x%llx\n",
525 __func__, kvm_rip_read(vcpu), svm->next_rip);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800526
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300527 kvm_rip_write(vcpu, svm->next_rip);
Glauber Costa2809f5d2009-05-12 16:21:05 -0400528 svm_set_interrupt_shadow(vcpu, 0);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800529}
530
Jan Kiszka116a4752010-02-23 17:47:54 +0100531static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200532 bool has_error_code, u32 error_code,
533 bool reinject)
Jan Kiszka116a4752010-02-23 17:47:54 +0100534{
535 struct vcpu_svm *svm = to_svm(vcpu);
536
Joerg Roedele0231712010-02-24 18:59:10 +0100537 /*
538 * If we are within a nested VM we'd better #VMEXIT and let the guest
539 * handle the exception
540 */
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200541 if (!reinject &&
542 nested_svm_check_exception(svm, nr, has_error_code, error_code))
Jan Kiszka116a4752010-02-23 17:47:54 +0100543 return;
544
Avi Kivity2a6b20b2010-11-09 16:15:42 +0200545 if (nr == BP_VECTOR && !static_cpu_has(X86_FEATURE_NRIPS)) {
Jan Kiszka66b71382010-02-23 17:47:56 +0100546 unsigned long rip, old_rip = kvm_rip_read(&svm->vcpu);
547
548 /*
549 * For guest debugging where we have to reinject #BP if some
550 * INT3 is guest-owned:
551 * Emulate nRIP by moving RIP forward. Will fail if injection
552 * raises a fault that is not intercepted. Still better than
553 * failing in all cases.
554 */
555 skip_emulated_instruction(&svm->vcpu);
556 rip = kvm_rip_read(&svm->vcpu);
557 svm->int3_rip = rip + svm->vmcb->save.cs.base;
558 svm->int3_injected = rip - old_rip;
559 }
560
Jan Kiszka116a4752010-02-23 17:47:54 +0100561 svm->vmcb->control.event_inj = nr
562 | SVM_EVTINJ_VALID
563 | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
564 | SVM_EVTINJ_TYPE_EXEPT;
565 svm->vmcb->control.event_inj_err = error_code;
566}
567
Joerg Roedel67ec6602010-05-17 14:43:35 +0200568static void svm_init_erratum_383(void)
569{
570 u32 low, high;
571 int err;
572 u64 val;
573
Borislav Petkove6ee94d2013-03-20 15:07:27 +0100574 if (!static_cpu_has_bug(X86_BUG_AMD_TLB_MMATCH))
Joerg Roedel67ec6602010-05-17 14:43:35 +0200575 return;
576
577 /* Use _safe variants to not break nested virtualization */
578 val = native_read_msr_safe(MSR_AMD64_DC_CFG, &err);
579 if (err)
580 return;
581
582 val |= (1ULL << 47);
583
584 low = lower_32_bits(val);
585 high = upper_32_bits(val);
586
587 native_write_msr_safe(MSR_AMD64_DC_CFG, low, high);
588
589 erratum_383_found = true;
590}
591
Boris Ostrovsky2b036c62012-01-09 14:00:35 -0500592static void svm_init_osvw(struct kvm_vcpu *vcpu)
593{
594 /*
595 * Guests should see errata 400 and 415 as fixed (assuming that
596 * HLT and IO instructions are intercepted).
597 */
598 vcpu->arch.osvw.length = (osvw_len >= 3) ? (osvw_len) : 3;
599 vcpu->arch.osvw.status = osvw_status & ~(6ULL);
600
601 /*
602 * By increasing VCPU's osvw.length to 3 we are telling the guest that
603 * all osvw.status bits inside that length, including bit 0 (which is
604 * reserved for erratum 298), are valid. However, if host processor's
605 * osvw_len is 0 then osvw_status[0] carries no information. We need to
606 * be conservative here and therefore we tell the guest that erratum 298
607 * is present (because we really don't know).
608 */
609 if (osvw_len == 0 && boot_cpu_data.x86 == 0x10)
610 vcpu->arch.osvw.status |= 1;
611}
612
Avi Kivity6aa8b732006-12-10 02:21:36 -0800613static int has_svm(void)
614{
Eduardo Habkost63d11422008-11-17 19:03:20 -0200615 const char *msg;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800616
Eduardo Habkost63d11422008-11-17 19:03:20 -0200617 if (!cpu_has_svm(&msg)) {
Joe Perchesff81ff12009-01-08 11:05:17 -0800618 printk(KERN_INFO "has_svm: %s\n", msg);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800619 return 0;
620 }
621
Avi Kivity6aa8b732006-12-10 02:21:36 -0800622 return 1;
623}
624
Radim Krčmář13a34e02014-08-28 15:13:03 +0200625static void svm_hardware_disable(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800626{
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100627 /* Make sure we clean up behind us */
628 if (static_cpu_has(X86_FEATURE_TSCRATEMSR))
629 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
630
Eduardo Habkost2c8dcee2008-11-17 19:03:21 -0200631 cpu_svm_disable();
Joerg Roedel1018faa2012-02-29 14:57:32 +0100632
633 amd_pmu_disable_virt();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800634}
635
Radim Krčmář13a34e02014-08-28 15:13:03 +0200636static int svm_hardware_enable(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800637{
638
Tejun Heo0fe1e002009-10-29 22:34:14 +0900639 struct svm_cpu_data *sd;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800640 uint64_t efer;
Gleb Natapov89a27f42010-02-16 10:51:48 +0200641 struct desc_ptr gdt_descr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800642 struct desc_struct *gdt;
643 int me = raw_smp_processor_id();
644
Alexander Graf10474ae2009-09-15 11:37:46 +0200645 rdmsrl(MSR_EFER, efer);
646 if (efer & EFER_SVME)
647 return -EBUSY;
648
Avi Kivity6aa8b732006-12-10 02:21:36 -0800649 if (!has_svm()) {
Borislav Petkov1f5b77f2012-10-20 20:20:04 +0200650 pr_err("%s: err EOPNOTSUPP on %d\n", __func__, me);
Alexander Graf10474ae2009-09-15 11:37:46 +0200651 return -EINVAL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800652 }
Tejun Heo0fe1e002009-10-29 22:34:14 +0900653 sd = per_cpu(svm_data, me);
Tejun Heo0fe1e002009-10-29 22:34:14 +0900654 if (!sd) {
Borislav Petkov1f5b77f2012-10-20 20:20:04 +0200655 pr_err("%s: svm_data is NULL on %d\n", __func__, me);
Alexander Graf10474ae2009-09-15 11:37:46 +0200656 return -EINVAL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800657 }
658
Tejun Heo0fe1e002009-10-29 22:34:14 +0900659 sd->asid_generation = 1;
660 sd->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
661 sd->next_asid = sd->max_asid + 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800662
Gleb Natapovd6ab1ed2010-02-25 12:43:07 +0200663 native_store_gdt(&gdt_descr);
Gleb Natapov89a27f42010-02-16 10:51:48 +0200664 gdt = (struct desc_struct *)gdt_descr.address;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900665 sd->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800666
Alexander Graf9962d032008-11-25 20:17:02 +0100667 wrmsrl(MSR_EFER, efer | EFER_SVME);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800668
Linus Torvaldsd0316552009-12-14 09:58:24 -0800669 wrmsrl(MSR_VM_HSAVE_PA, page_to_pfn(sd->save_area) << PAGE_SHIFT);
Alexander Graf10474ae2009-09-15 11:37:46 +0200670
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100671 if (static_cpu_has(X86_FEATURE_TSCRATEMSR)) {
672 wrmsrl(MSR_AMD64_TSC_RATIO, TSC_RATIO_DEFAULT);
Christoph Lameter89cbc762014-08-17 12:30:40 -0500673 __this_cpu_write(current_tsc_ratio, TSC_RATIO_DEFAULT);
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100674 }
675
Boris Ostrovsky2b036c62012-01-09 14:00:35 -0500676
677 /*
678 * Get OSVW bits.
679 *
680 * Note that it is possible to have a system with mixed processor
681 * revisions and therefore different OSVW bits. If bits are not the same
682 * on different processors then choose the worst case (i.e. if erratum
683 * is present on one processor and not on another then assume that the
684 * erratum is present everywhere).
685 */
686 if (cpu_has(&boot_cpu_data, X86_FEATURE_OSVW)) {
687 uint64_t len, status = 0;
688 int err;
689
690 len = native_read_msr_safe(MSR_AMD64_OSVW_ID_LENGTH, &err);
691 if (!err)
692 status = native_read_msr_safe(MSR_AMD64_OSVW_STATUS,
693 &err);
694
695 if (err)
696 osvw_status = osvw_len = 0;
697 else {
698 if (len < osvw_len)
699 osvw_len = len;
700 osvw_status |= status;
701 osvw_status &= (1ULL << osvw_len) - 1;
702 }
703 } else
704 osvw_status = osvw_len = 0;
705
Joerg Roedel67ec6602010-05-17 14:43:35 +0200706 svm_init_erratum_383();
707
Joerg Roedel1018faa2012-02-29 14:57:32 +0100708 amd_pmu_enable_virt();
709
Alexander Graf10474ae2009-09-15 11:37:46 +0200710 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800711}
712
Joerg Roedel0da1db752008-07-02 16:02:11 +0200713static void svm_cpu_uninit(int cpu)
714{
Tejun Heo0fe1e002009-10-29 22:34:14 +0900715 struct svm_cpu_data *sd = per_cpu(svm_data, raw_smp_processor_id());
Joerg Roedel0da1db752008-07-02 16:02:11 +0200716
Tejun Heo0fe1e002009-10-29 22:34:14 +0900717 if (!sd)
Joerg Roedel0da1db752008-07-02 16:02:11 +0200718 return;
719
720 per_cpu(svm_data, raw_smp_processor_id()) = NULL;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900721 __free_page(sd->save_area);
722 kfree(sd);
Joerg Roedel0da1db752008-07-02 16:02:11 +0200723}
724
Avi Kivity6aa8b732006-12-10 02:21:36 -0800725static int svm_cpu_init(int cpu)
726{
Tejun Heo0fe1e002009-10-29 22:34:14 +0900727 struct svm_cpu_data *sd;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800728 int r;
729
Tejun Heo0fe1e002009-10-29 22:34:14 +0900730 sd = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
731 if (!sd)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800732 return -ENOMEM;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900733 sd->cpu = cpu;
734 sd->save_area = alloc_page(GFP_KERNEL);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800735 r = -ENOMEM;
Tejun Heo0fe1e002009-10-29 22:34:14 +0900736 if (!sd->save_area)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800737 goto err_1;
738
Tejun Heo0fe1e002009-10-29 22:34:14 +0900739 per_cpu(svm_data, cpu) = sd;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800740
741 return 0;
742
743err_1:
Tejun Heo0fe1e002009-10-29 22:34:14 +0900744 kfree(sd);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800745 return r;
746
747}
748
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100749static bool valid_msr_intercept(u32 index)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800750{
751 int i;
752
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100753 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++)
754 if (direct_access_msrs[i].index == index)
755 return true;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800756
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100757 return false;
758}
759
Avi Kivity6aa8b732006-12-10 02:21:36 -0800760static void set_msr_interception(u32 *msrpm, unsigned msr,
761 int read, int write)
762{
Joerg Roedel455716f2010-03-01 15:34:35 +0100763 u8 bit_read, bit_write;
764 unsigned long tmp;
765 u32 offset;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800766
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100767 /*
768 * If this warning triggers extend the direct_access_msrs list at the
769 * beginning of the file
770 */
771 WARN_ON(!valid_msr_intercept(msr));
772
Joerg Roedel455716f2010-03-01 15:34:35 +0100773 offset = svm_msrpm_offset(msr);
774 bit_read = 2 * (msr & 0x0f);
775 bit_write = 2 * (msr & 0x0f) + 1;
776 tmp = msrpm[offset];
Avi Kivity6aa8b732006-12-10 02:21:36 -0800777
Joerg Roedel455716f2010-03-01 15:34:35 +0100778 BUG_ON(offset == MSR_INVALID);
779
780 read ? clear_bit(bit_read, &tmp) : set_bit(bit_read, &tmp);
781 write ? clear_bit(bit_write, &tmp) : set_bit(bit_write, &tmp);
782
783 msrpm[offset] = tmp;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800784}
785
Joerg Roedelf65c2292008-02-13 18:58:46 +0100786static void svm_vcpu_init_msrpm(u32 *msrpm)
787{
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100788 int i;
789
Joerg Roedelf65c2292008-02-13 18:58:46 +0100790 memset(msrpm, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
791
Joerg Roedelac72a9b2010-03-01 15:34:36 +0100792 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
793 if (!direct_access_msrs[i].always)
794 continue;
795
796 set_msr_interception(msrpm, direct_access_msrs[i].index, 1, 1);
797 }
Joerg Roedelf65c2292008-02-13 18:58:46 +0100798}
799
Joerg Roedel323c3d82010-03-01 15:34:37 +0100800static void add_msr_offset(u32 offset)
801{
802 int i;
803
804 for (i = 0; i < MSRPM_OFFSETS; ++i) {
805
806 /* Offset already in list? */
807 if (msrpm_offsets[i] == offset)
808 return;
809
810 /* Slot used by another offset? */
811 if (msrpm_offsets[i] != MSR_INVALID)
812 continue;
813
814 /* Add offset to list */
815 msrpm_offsets[i] = offset;
816
817 return;
818 }
819
820 /*
821 * If this BUG triggers the msrpm_offsets table has an overflow. Just
822 * increase MSRPM_OFFSETS in this case.
823 */
824 BUG();
825}
826
827static void init_msrpm_offsets(void)
828{
829 int i;
830
831 memset(msrpm_offsets, 0xff, sizeof(msrpm_offsets));
832
833 for (i = 0; direct_access_msrs[i].index != MSR_INVALID; i++) {
834 u32 offset;
835
836 offset = svm_msrpm_offset(direct_access_msrs[i].index);
837 BUG_ON(offset == MSR_INVALID);
838
839 add_msr_offset(offset);
840 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800841}
842
Joerg Roedel24e09cb2008-02-13 18:58:47 +0100843static void svm_enable_lbrv(struct vcpu_svm *svm)
844{
845 u32 *msrpm = svm->msrpm;
846
847 svm->vmcb->control.lbr_ctl = 1;
848 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
849 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
850 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
851 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 1, 1);
852}
853
854static void svm_disable_lbrv(struct vcpu_svm *svm)
855{
856 u32 *msrpm = svm->msrpm;
857
858 svm->vmcb->control.lbr_ctl = 0;
859 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
860 set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
861 set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
862 set_msr_interception(msrpm, MSR_IA32_LASTINTTOIP, 0, 0);
863}
864
Avi Kivity6aa8b732006-12-10 02:21:36 -0800865static __init int svm_hardware_setup(void)
866{
867 int cpu;
868 struct page *iopm_pages;
Joerg Roedelf65c2292008-02-13 18:58:46 +0100869 void *iopm_va;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800870 int r;
871
Avi Kivity6aa8b732006-12-10 02:21:36 -0800872 iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
873
874 if (!iopm_pages)
875 return -ENOMEM;
Anthony Liguoric8681332007-04-30 09:48:11 +0300876
877 iopm_va = page_address(iopm_pages);
878 memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800879 iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
880
Joerg Roedel323c3d82010-03-01 15:34:37 +0100881 init_msrpm_offsets();
882
Joerg Roedel50a37eb2008-01-31 14:57:38 +0100883 if (boot_cpu_has(X86_FEATURE_NX))
884 kvm_enable_efer_bits(EFER_NX);
885
Alexander Graf1b2fd702009-02-02 16:23:51 +0100886 if (boot_cpu_has(X86_FEATURE_FXSR_OPT))
887 kvm_enable_efer_bits(EFER_FFXSR);
888
Joerg Roedel92a1f122011-03-25 09:44:51 +0100889 if (boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
890 u64 max;
891
892 kvm_has_tsc_control = true;
893
894 /*
895 * Make sure the user can only configure tsc_khz values that
896 * fit into a signed integer.
897 * A min value is not calculated needed because it will always
898 * be 1 on all machines and a value of 0 is used to disable
899 * tsc-scaling for the vcpu.
900 */
901 max = min(0x7fffffffULL, __scale_tsc(tsc_khz, TSC_RATIO_MAX));
902
903 kvm_max_guest_tsc_khz = max;
904 }
905
Alexander Graf236de052008-11-25 20:17:10 +0100906 if (nested) {
907 printk(KERN_INFO "kvm: Nested Virtualization enabled\n");
Joerg Roedeleec4b142010-05-05 16:04:44 +0200908 kvm_enable_efer_bits(EFER_SVME | EFER_LMSLE);
Alexander Graf236de052008-11-25 20:17:10 +0100909 }
910
Zachary Amsden3230bb42009-09-29 11:38:37 -1000911 for_each_possible_cpu(cpu) {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800912 r = svm_cpu_init(cpu);
913 if (r)
Joerg Roedelf65c2292008-02-13 18:58:46 +0100914 goto err;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800915 }
Joerg Roedel33bd6a02008-02-07 13:47:38 +0100916
Avi Kivity2a6b20b2010-11-09 16:15:42 +0200917 if (!boot_cpu_has(X86_FEATURE_NPT))
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100918 npt_enabled = false;
919
Joerg Roedel6c7dac72008-02-07 13:47:40 +0100920 if (npt_enabled && !npt) {
921 printk(KERN_INFO "kvm: Nested Paging disabled\n");
922 npt_enabled = false;
923 }
924
Joerg Roedel18552672008-02-07 13:47:41 +0100925 if (npt_enabled) {
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100926 printk(KERN_INFO "kvm: Nested Paging enabled\n");
Joerg Roedel18552672008-02-07 13:47:41 +0100927 kvm_enable_tdp();
Joerg Roedel5f4cb662008-07-14 20:36:36 +0200928 } else
929 kvm_disable_tdp();
Joerg Roedele3da3ac2008-02-07 13:47:39 +0100930
Avi Kivity6aa8b732006-12-10 02:21:36 -0800931 return 0;
932
Joerg Roedelf65c2292008-02-13 18:58:46 +0100933err:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800934 __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
935 iopm_base = 0;
936 return r;
937}
938
939static __exit void svm_hardware_unsetup(void)
940{
Joerg Roedel0da1db752008-07-02 16:02:11 +0200941 int cpu;
942
Zachary Amsden3230bb42009-09-29 11:38:37 -1000943 for_each_possible_cpu(cpu)
Joerg Roedel0da1db752008-07-02 16:02:11 +0200944 svm_cpu_uninit(cpu);
945
Avi Kivity6aa8b732006-12-10 02:21:36 -0800946 __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
Joerg Roedelf65c2292008-02-13 18:58:46 +0100947 iopm_base = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800948}
949
950static void init_seg(struct vmcb_seg *seg)
951{
952 seg->selector = 0;
953 seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
Joerg Roedele0231712010-02-24 18:59:10 +0100954 SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800955 seg->limit = 0xffff;
956 seg->base = 0;
957}
958
959static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
960{
961 seg->selector = 0;
962 seg->attrib = SVM_SELECTOR_P_MASK | type;
963 seg->limit = 0xffff;
964 seg->base = 0;
965}
966
Joerg Roedelfbc0db72011-03-25 09:44:46 +0100967static u64 __scale_tsc(u64 ratio, u64 tsc)
968{
969 u64 mult, frac, _tsc;
970
971 mult = ratio >> 32;
972 frac = ratio & ((1ULL << 32) - 1);
973
974 _tsc = tsc;
975 _tsc *= mult;
976 _tsc += (tsc >> 32) * frac;
977 _tsc += ((tsc & ((1ULL << 32) - 1)) * frac) >> 32;
978
979 return _tsc;
980}
981
982static u64 svm_scale_tsc(struct kvm_vcpu *vcpu, u64 tsc)
983{
984 struct vcpu_svm *svm = to_svm(vcpu);
985 u64 _tsc = tsc;
986
987 if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
988 _tsc = __scale_tsc(svm->tsc_ratio, tsc);
989
990 return _tsc;
991}
992
Zachary Amsdencc578282012-02-03 15:43:50 -0200993static void svm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
Joerg Roedel4051b182011-03-25 09:44:49 +0100994{
995 struct vcpu_svm *svm = to_svm(vcpu);
996 u64 ratio;
997 u64 khz;
998
Zachary Amsdencc578282012-02-03 15:43:50 -0200999 /* Guest TSC same frequency as host TSC? */
1000 if (!scale) {
Joerg Roedel4051b182011-03-25 09:44:49 +01001001 svm->tsc_ratio = TSC_RATIO_DEFAULT;
1002 return;
1003 }
1004
Zachary Amsdencc578282012-02-03 15:43:50 -02001005 /* TSC scaling supported? */
1006 if (!boot_cpu_has(X86_FEATURE_TSCRATEMSR)) {
1007 if (user_tsc_khz > tsc_khz) {
1008 vcpu->arch.tsc_catchup = 1;
1009 vcpu->arch.tsc_always_catchup = 1;
1010 } else
1011 WARN(1, "user requested TSC rate below hardware speed\n");
1012 return;
1013 }
1014
Joerg Roedel4051b182011-03-25 09:44:49 +01001015 khz = user_tsc_khz;
1016
1017 /* TSC scaling required - calculate ratio */
1018 ratio = khz << 32;
1019 do_div(ratio, tsc_khz);
1020
1021 if (ratio == 0 || ratio & TSC_RATIO_RSVD) {
1022 WARN_ONCE(1, "Invalid TSC ratio - virtual-tsc-khz=%u\n",
1023 user_tsc_khz);
1024 return;
1025 }
Joerg Roedel4051b182011-03-25 09:44:49 +01001026 svm->tsc_ratio = ratio;
1027}
1028
Will Auldba904632012-11-29 12:42:50 -08001029static u64 svm_read_tsc_offset(struct kvm_vcpu *vcpu)
1030{
1031 struct vcpu_svm *svm = to_svm(vcpu);
1032
1033 return svm->vmcb->control.tsc_offset;
1034}
1035
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001036static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
1037{
1038 struct vcpu_svm *svm = to_svm(vcpu);
1039 u64 g_tsc_offset = 0;
1040
Joerg Roedel20307532010-11-29 17:51:48 +01001041 if (is_guest_mode(vcpu)) {
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001042 g_tsc_offset = svm->vmcb->control.tsc_offset -
1043 svm->nested.hsave->control.tsc_offset;
1044 svm->nested.hsave->control.tsc_offset = offset;
Yoshihiro YUNOMAE489223e2013-06-12 16:43:44 +09001045 } else
1046 trace_kvm_write_tsc_offset(vcpu->vcpu_id,
1047 svm->vmcb->control.tsc_offset,
1048 offset);
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001049
1050 svm->vmcb->control.tsc_offset = offset + g_tsc_offset;
Joerg Roedel116a0a22010-12-03 11:45:49 +01001051
1052 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10001053}
1054
Marcelo Tosattif1e2b262012-02-03 15:43:55 -02001055static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
Zachary Amsdene48672f2010-08-19 22:07:23 -10001056{
1057 struct vcpu_svm *svm = to_svm(vcpu);
1058
Chris J Argesd913b902014-11-12 21:00:39 -06001059 if (host) {
1060 if (svm->tsc_ratio != TSC_RATIO_DEFAULT)
1061 WARN_ON(adjustment < 0);
1062 adjustment = svm_scale_tsc(vcpu, (u64)adjustment);
1063 }
Marcelo Tosattif1e2b262012-02-03 15:43:55 -02001064
Zachary Amsdene48672f2010-08-19 22:07:23 -10001065 svm->vmcb->control.tsc_offset += adjustment;
Joerg Roedel20307532010-11-29 17:51:48 +01001066 if (is_guest_mode(vcpu))
Zachary Amsdene48672f2010-08-19 22:07:23 -10001067 svm->nested.hsave->control.tsc_offset += adjustment;
Yoshihiro YUNOMAE489223e2013-06-12 16:43:44 +09001068 else
1069 trace_kvm_write_tsc_offset(vcpu->vcpu_id,
1070 svm->vmcb->control.tsc_offset - adjustment,
1071 svm->vmcb->control.tsc_offset);
1072
Joerg Roedel116a0a22010-12-03 11:45:49 +01001073 mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
Zachary Amsdene48672f2010-08-19 22:07:23 -10001074}
1075
Joerg Roedel857e4092011-03-25 09:44:50 +01001076static u64 svm_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc)
1077{
1078 u64 tsc;
1079
1080 tsc = svm_scale_tsc(vcpu, native_read_tsc());
1081
1082 return target_tsc - tsc;
1083}
1084
Joerg Roedele6101a92008-02-13 18:58:45 +01001085static void init_vmcb(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001086{
Joerg Roedele6101a92008-02-13 18:58:45 +01001087 struct vmcb_control_area *control = &svm->vmcb->control;
1088 struct vmcb_save_area *save = &svm->vmcb->save;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001089
Avi Kivitybff78272010-01-07 13:16:08 +02001090 svm->vcpu.fpu_active = 1;
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001091 svm->vcpu.arch.hflags = 0;
Avi Kivitybff78272010-01-07 13:16:08 +02001092
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001093 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1094 set_cr_intercept(svm, INTERCEPT_CR3_READ);
1095 set_cr_intercept(svm, INTERCEPT_CR4_READ);
1096 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
1097 set_cr_intercept(svm, INTERCEPT_CR3_WRITE);
1098 set_cr_intercept(svm, INTERCEPT_CR4_WRITE);
1099 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001100
Paolo Bonzini5315c712014-03-03 13:08:29 +01001101 set_dr_intercepts(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001102
Joerg Roedel18c918c2010-11-30 18:03:59 +01001103 set_exception_intercept(svm, PF_VECTOR);
1104 set_exception_intercept(svm, UD_VECTOR);
1105 set_exception_intercept(svm, MC_VECTOR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001106
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01001107 set_intercept(svm, INTERCEPT_INTR);
1108 set_intercept(svm, INTERCEPT_NMI);
1109 set_intercept(svm, INTERCEPT_SMI);
1110 set_intercept(svm, INTERCEPT_SELECTIVE_CR0);
Avi Kivity332b56e2011-11-10 14:57:24 +02001111 set_intercept(svm, INTERCEPT_RDPMC);
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01001112 set_intercept(svm, INTERCEPT_CPUID);
1113 set_intercept(svm, INTERCEPT_INVD);
1114 set_intercept(svm, INTERCEPT_HLT);
1115 set_intercept(svm, INTERCEPT_INVLPG);
1116 set_intercept(svm, INTERCEPT_INVLPGA);
1117 set_intercept(svm, INTERCEPT_IOIO_PROT);
1118 set_intercept(svm, INTERCEPT_MSR_PROT);
1119 set_intercept(svm, INTERCEPT_TASK_SWITCH);
1120 set_intercept(svm, INTERCEPT_SHUTDOWN);
1121 set_intercept(svm, INTERCEPT_VMRUN);
1122 set_intercept(svm, INTERCEPT_VMMCALL);
1123 set_intercept(svm, INTERCEPT_VMLOAD);
1124 set_intercept(svm, INTERCEPT_VMSAVE);
1125 set_intercept(svm, INTERCEPT_STGI);
1126 set_intercept(svm, INTERCEPT_CLGI);
1127 set_intercept(svm, INTERCEPT_SKINIT);
1128 set_intercept(svm, INTERCEPT_WBINVD);
1129 set_intercept(svm, INTERCEPT_MONITOR);
1130 set_intercept(svm, INTERCEPT_MWAIT);
Joerg Roedel81dd35d2010-12-07 17:15:06 +01001131 set_intercept(svm, INTERCEPT_XSETBV);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001132
1133 control->iopm_base_pa = iopm_base;
Joerg Roedelf65c2292008-02-13 18:58:46 +01001134 control->msrpm_base_pa = __pa(svm->msrpm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001135 control->int_ctl = V_INTR_MASKING_MASK;
1136
1137 init_seg(&save->es);
1138 init_seg(&save->ss);
1139 init_seg(&save->ds);
1140 init_seg(&save->fs);
1141 init_seg(&save->gs);
1142
1143 save->cs.selector = 0xf000;
Paolo Bonzini04b66832013-03-19 16:30:26 +01001144 save->cs.base = 0xffff0000;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001145 /* Executable/Readable Code Segment */
1146 save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
1147 SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
1148 save->cs.limit = 0xffff;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001149
1150 save->gdtr.limit = 0xffff;
1151 save->idtr.limit = 0xffff;
1152
1153 init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
1154 init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
1155
Marcelo Tosattieaa48512010-08-31 19:13:14 -03001156 svm_set_efer(&svm->vcpu, 0);
Mike Dayd77c26f2007-10-08 09:02:08 -04001157 save->dr6 = 0xffff0ff0;
Avi Kivityf6e78472010-08-02 15:30:20 +03001158 kvm_set_rflags(&svm->vcpu, 2);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001159 save->rip = 0x0000fff0;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001160 svm->vcpu.arch.regs[VCPU_REGS_RIP] = save->rip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001161
Joerg Roedele0231712010-02-24 18:59:10 +01001162 /*
1163 * This is the guest-visible cr0 value.
Eduardo Habkost18fa0002009-10-24 02:49:59 -02001164 * svm_set_cr0() sets PG and WP and clears NW and CD on save->cr0.
Avi Kivity6aa8b732006-12-10 02:21:36 -08001165 */
Marcelo Tosatti678041a2010-08-31 19:13:13 -03001166 svm->vcpu.arch.cr0 = 0;
1167 (void)kvm_set_cr0(&svm->vcpu, X86_CR0_NW | X86_CR0_CD | X86_CR0_ET);
Eduardo Habkost18fa0002009-10-24 02:49:59 -02001168
Rusty Russell66aee912007-07-17 23:34:16 +10001169 save->cr4 = X86_CR4_PAE;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001170 /* rdx = ?? */
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001171
1172 if (npt_enabled) {
1173 /* Setup VMCB for Nested Paging */
1174 control->nested_ctl = 1;
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01001175 clr_intercept(svm, INTERCEPT_INVLPG);
Joerg Roedel18c918c2010-11-30 18:03:59 +01001176 clr_exception_intercept(svm, PF_VECTOR);
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001177 clr_cr_intercept(svm, INTERCEPT_CR3_READ);
1178 clr_cr_intercept(svm, INTERCEPT_CR3_WRITE);
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001179 save->g_pat = 0x0007040600070406ULL;
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001180 save->cr3 = 0;
1181 save->cr4 = 0;
1182 }
Joerg Roedelf40f6a42010-12-03 15:25:15 +01001183 svm->asid_generation = 0;
Alexander Graf1371d902008-11-25 20:17:04 +01001184
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001185 svm->nested.vmcb = 0;
Joerg Roedel2af91942009-08-07 11:49:28 +02001186 svm->vcpu.arch.hflags = 0;
1187
Avi Kivity2a6b20b2010-11-09 16:15:42 +02001188 if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) {
Mark Langsdorf565d0992009-10-06 14:25:02 -05001189 control->pause_filter_count = 3000;
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01001190 set_intercept(svm, INTERCEPT_PAUSE);
Mark Langsdorf565d0992009-10-06 14:25:02 -05001191 }
1192
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01001193 mark_all_dirty(svm->vmcb);
1194
Joerg Roedel2af91942009-08-07 11:49:28 +02001195 enable_gif(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001196}
1197
Jan Kiszka57f252f2013-03-12 10:20:24 +01001198static void svm_vcpu_reset(struct kvm_vcpu *vcpu)
Avi Kivity04d2cc72007-09-10 18:10:54 +03001199{
1200 struct vcpu_svm *svm = to_svm(vcpu);
Julian Stecklina66f7b722012-12-05 15:26:19 +01001201 u32 dummy;
1202 u32 eax = 1;
Avi Kivity04d2cc72007-09-10 18:10:54 +03001203
Joerg Roedele6101a92008-02-13 18:58:45 +01001204 init_vmcb(svm);
Avi Kivity70433382007-11-07 12:57:23 +02001205
Julian Stecklina66f7b722012-12-05 15:26:19 +01001206 kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy);
1207 kvm_register_write(vcpu, VCPU_REGS_RDX, eax);
Avi Kivity04d2cc72007-09-10 18:10:54 +03001208}
1209
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001210static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001211{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001212 struct vcpu_svm *svm;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001213 struct page *page;
Joerg Roedelf65c2292008-02-13 18:58:46 +01001214 struct page *msrpm_pages;
Alexander Grafb286d5d2008-11-25 20:17:05 +01001215 struct page *hsave_page;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001216 struct page *nested_msrpm_pages;
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001217 int err;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001218
Rusty Russellc16f8622007-07-30 21:12:19 +10001219 svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001220 if (!svm) {
1221 err = -ENOMEM;
1222 goto out;
1223 }
1224
Joerg Roedelfbc0db72011-03-25 09:44:46 +01001225 svm->tsc_ratio = TSC_RATIO_DEFAULT;
1226
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001227 err = kvm_vcpu_init(&svm->vcpu, kvm, id);
1228 if (err)
1229 goto free_svm;
1230
Joerg Roedelf65c2292008-02-13 18:58:46 +01001231 err = -ENOMEM;
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001232 page = alloc_page(GFP_KERNEL);
1233 if (!page)
1234 goto uninit;
1235
Joerg Roedelf65c2292008-02-13 18:58:46 +01001236 msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
1237 if (!msrpm_pages)
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001238 goto free_page1;
Alexander Graf3d6368e2008-11-25 20:17:07 +01001239
1240 nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
1241 if (!nested_msrpm_pages)
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001242 goto free_page2;
Joerg Roedelf65c2292008-02-13 18:58:46 +01001243
Alexander Grafb286d5d2008-11-25 20:17:05 +01001244 hsave_page = alloc_page(GFP_KERNEL);
1245 if (!hsave_page)
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001246 goto free_page3;
1247
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001248 svm->nested.hsave = page_address(hsave_page);
Alexander Grafb286d5d2008-11-25 20:17:05 +01001249
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001250 svm->msrpm = page_address(msrpm_pages);
1251 svm_vcpu_init_msrpm(svm->msrpm);
1252
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001253 svm->nested.msrpm = page_address(nested_msrpm_pages);
Joerg Roedel323c3d82010-03-01 15:34:37 +01001254 svm_vcpu_init_msrpm(svm->nested.msrpm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01001255
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001256 svm->vmcb = page_address(page);
1257 clear_page(svm->vmcb);
1258 svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
1259 svm->asid_generation = 0;
Joerg Roedele6101a92008-02-13 18:58:45 +01001260 init_vmcb(svm);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001261
Tang Chen73a6d942014-09-11 13:38:00 +08001262 svm->vcpu.arch.apic_base = APIC_DEFAULT_PHYS_BASE |
1263 MSR_IA32_APICBASE_ENABLE;
Nadav Amit58d269d2015-04-02 03:10:36 +03001264 if (kvm_vcpu_is_reset_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
Takuya Yoshikawab7af4042010-03-09 14:55:19 +09001271free_page3:
1272 __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER);
1273free_page2:
1274 __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
1275free_page1:
1276 __free_page(page);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001277uninit:
1278 kvm_vcpu_uninit(&svm->vcpu);
1279free_svm:
Rusty Russella4770342007-08-01 14:46:11 +10001280 kmem_cache_free(kvm_vcpu_cache, svm);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001281out:
1282 return ERR_PTR(err);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001283}
1284
1285static void svm_free_vcpu(struct kvm_vcpu *vcpu)
1286{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001287 struct vcpu_svm *svm = to_svm(vcpu);
1288
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001289 __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
Joerg Roedelf65c2292008-02-13 18:58:46 +01001290 __free_pages(virt_to_page(svm->msrpm), MSRPM_ALLOC_ORDER);
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02001291 __free_page(virt_to_page(svm->nested.hsave));
1292 __free_pages(virt_to_page(svm->nested.msrpm), MSRPM_ALLOC_ORDER);
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001293 kvm_vcpu_uninit(vcpu);
Rusty Russella4770342007-08-01 14:46:11 +10001294 kmem_cache_free(kvm_vcpu_cache, svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001295}
1296
Avi Kivity15ad7142007-07-11 18:17:21 +03001297static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001298{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001299 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03001300 int i;
Avi Kivity0cc50642007-03-25 12:07:27 +02001301
Avi Kivity0cc50642007-03-25 12:07:27 +02001302 if (unlikely(cpu != vcpu->cpu)) {
Marcelo Tosatti4b656b12009-07-21 12:47:45 -03001303 svm->asid_generation = 0;
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01001304 mark_all_dirty(svm->vmcb);
Avi Kivity0cc50642007-03-25 12:07:27 +02001305 }
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001306
Avi Kivity82ca2d12010-10-21 12:20:34 +02001307#ifdef CONFIG_X86_64
1308 rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host.gs_base);
1309#endif
Avi Kivitydacccfd2010-10-21 12:20:33 +02001310 savesegment(fs, svm->host.fs);
1311 savesegment(gs, svm->host.gs);
1312 svm->host.ldt = kvm_read_ldt();
1313
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001314 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001315 rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
Joerg Roedelfbc0db72011-03-25 09:44:46 +01001316
1317 if (static_cpu_has(X86_FEATURE_TSCRATEMSR) &&
Christoph Lameter89cbc762014-08-17 12:30:40 -05001318 svm->tsc_ratio != __this_cpu_read(current_tsc_ratio)) {
1319 __this_cpu_write(current_tsc_ratio, svm->tsc_ratio);
Joerg Roedelfbc0db72011-03-25 09:44:46 +01001320 wrmsrl(MSR_AMD64_TSC_RATIO, svm->tsc_ratio);
1321 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001322}
1323
1324static void svm_vcpu_put(struct kvm_vcpu *vcpu)
1325{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001326 struct vcpu_svm *svm = to_svm(vcpu);
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001327 int i;
1328
Avi Kivitye1beb1d2007-11-18 13:50:24 +02001329 ++vcpu->stat.host_state_reload;
Avi Kivitydacccfd2010-10-21 12:20:33 +02001330 kvm_load_ldt(svm->host.ldt);
1331#ifdef CONFIG_X86_64
1332 loadsegment(fs, svm->host.fs);
Avi Kivitydacccfd2010-10-21 12:20:33 +02001333 wrmsrl(MSR_KERNEL_GS_BASE, current->thread.gs);
Joerg Roedel893a5ab2011-01-14 16:45:01 +01001334 load_gs_index(svm->host.gs);
Avi Kivitydacccfd2010-10-21 12:20:33 +02001335#else
Avi Kivity831ca602011-03-08 16:09:51 +02001336#ifdef CONFIG_X86_32_LAZY_GS
Avi Kivitydacccfd2010-10-21 12:20:33 +02001337 loadsegment(gs, svm->host.gs);
1338#endif
Avi Kivity831ca602011-03-08 16:09:51 +02001339#endif
Anthony Liguori94dfbdb2007-04-29 11:56:06 +03001340 for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001341 wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001342}
1343
Avi Kivity6aa8b732006-12-10 02:21:36 -08001344static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
1345{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001346 return to_svm(vcpu)->vmcb->save.rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001347}
1348
1349static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
1350{
Paolo Bonziniae9fedc2014-05-14 09:39:49 +02001351 /*
1352 * Any change of EFLAGS.VM is accompained by a reload of SS
1353 * (caused by either a task switch or an inter-privilege IRET),
1354 * so we do not need to update the CPL here.
1355 */
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001356 to_svm(vcpu)->vmcb->save.rflags = rflags;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001357}
1358
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001359static void svm_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
1360{
1361 switch (reg) {
1362 case VCPU_EXREG_PDPTR:
1363 BUG_ON(!npt_enabled);
Avi Kivity9f8fe502010-12-05 17:30:00 +02001364 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
Avi Kivity6de4f3a2009-05-31 22:58:47 +03001365 break;
1366 default:
1367 BUG();
1368 }
1369}
1370
Alexander Graff0b85052008-11-25 20:17:01 +01001371static void svm_set_vintr(struct vcpu_svm *svm)
1372{
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01001373 set_intercept(svm, INTERCEPT_VINTR);
Alexander Graff0b85052008-11-25 20:17:01 +01001374}
1375
1376static void svm_clear_vintr(struct vcpu_svm *svm)
1377{
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01001378 clr_intercept(svm, INTERCEPT_VINTR);
Alexander Graff0b85052008-11-25 20:17:01 +01001379}
1380
Avi Kivity6aa8b732006-12-10 02:21:36 -08001381static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
1382{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001383 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001384
1385 switch (seg) {
1386 case VCPU_SREG_CS: return &save->cs;
1387 case VCPU_SREG_DS: return &save->ds;
1388 case VCPU_SREG_ES: return &save->es;
1389 case VCPU_SREG_FS: return &save->fs;
1390 case VCPU_SREG_GS: return &save->gs;
1391 case VCPU_SREG_SS: return &save->ss;
1392 case VCPU_SREG_TR: return &save->tr;
1393 case VCPU_SREG_LDTR: return &save->ldtr;
1394 }
1395 BUG();
Al Viro8b6d44c2007-02-09 16:38:40 +00001396 return NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001397}
1398
1399static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
1400{
1401 struct vmcb_seg *s = svm_seg(vcpu, seg);
1402
1403 return s->base;
1404}
1405
1406static void svm_get_segment(struct kvm_vcpu *vcpu,
1407 struct kvm_segment *var, int seg)
1408{
1409 struct vmcb_seg *s = svm_seg(vcpu, seg);
1410
1411 var->base = s->base;
1412 var->limit = s->limit;
1413 var->selector = s->selector;
1414 var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
1415 var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
1416 var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
1417 var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
1418 var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
1419 var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
1420 var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
Jim Mattson80112c82014-07-08 09:47:41 +05301421
1422 /*
1423 * AMD CPUs circa 2014 track the G bit for all segments except CS.
1424 * However, the SVM spec states that the G bit is not observed by the
1425 * CPU, and some VMware virtual CPUs drop the G bit for all segments.
1426 * So let's synthesize a legal G bit for all segments, this helps
1427 * running KVM nested. It also helps cross-vendor migration, because
1428 * Intel's vmentry has a check on the 'G' bit.
1429 */
1430 var->g = s->limit > 0xfffff;
Amit Shah25022ac2008-10-27 09:04:17 +00001431
Joerg Roedele0231712010-02-24 18:59:10 +01001432 /*
1433 * AMD's VMCB does not have an explicit unusable field, so emulate it
Andre Przywara19bca6a2009-04-28 12:45:30 +02001434 * for cross vendor migration purposes by "not present"
1435 */
1436 var->unusable = !var->present || (var->type == 0);
1437
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001438 switch (seg) {
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001439 case VCPU_SREG_TR:
1440 /*
1441 * Work around a bug where the busy flag in the tr selector
1442 * isn't exposed
1443 */
Amit Shahc0d09822008-10-27 09:04:18 +00001444 var->type |= 0x2;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001445 break;
1446 case VCPU_SREG_DS:
1447 case VCPU_SREG_ES:
1448 case VCPU_SREG_FS:
1449 case VCPU_SREG_GS:
1450 /*
1451 * The accessed bit must always be set in the segment
1452 * descriptor cache, although it can be cleared in the
1453 * descriptor, the cached bit always remains at 1. Since
1454 * Intel has a check on this, set it here to support
1455 * cross-vendor migration.
1456 */
1457 if (!var->unusable)
1458 var->type |= 0x1;
1459 break;
Andre Przywarab586eb02009-04-28 12:45:43 +02001460 case VCPU_SREG_SS:
Joerg Roedele0231712010-02-24 18:59:10 +01001461 /*
1462 * On AMD CPUs sometimes the DB bit in the segment
Andre Przywarab586eb02009-04-28 12:45:43 +02001463 * descriptor is left as 1, although the whole segment has
1464 * been made unusable. Clear it here to pass an Intel VMX
1465 * entry check when cross vendor migrating.
1466 */
1467 if (var->unusable)
1468 var->db = 0;
Jan Kiszka33b458d2014-06-29 17:12:43 +02001469 var->dpl = to_svm(vcpu)->vmcb->save.cpl;
Andre Przywarab586eb02009-04-28 12:45:43 +02001470 break;
Andre Przywara1fbdc7a2009-01-11 22:39:44 +01001471 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08001472}
1473
Izik Eidus2e4d2652008-03-24 19:38:34 +02001474static int svm_get_cpl(struct kvm_vcpu *vcpu)
1475{
1476 struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
1477
1478 return save->cpl;
1479}
1480
Gleb Natapov89a27f42010-02-16 10:51:48 +02001481static void svm_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001482{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001483 struct vcpu_svm *svm = to_svm(vcpu);
1484
Gleb Natapov89a27f42010-02-16 10:51:48 +02001485 dt->size = svm->vmcb->save.idtr.limit;
1486 dt->address = svm->vmcb->save.idtr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001487}
1488
Gleb Natapov89a27f42010-02-16 10:51:48 +02001489static void svm_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001490{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001491 struct vcpu_svm *svm = to_svm(vcpu);
1492
Gleb Natapov89a27f42010-02-16 10:51:48 +02001493 svm->vmcb->save.idtr.limit = dt->size;
1494 svm->vmcb->save.idtr.base = dt->address ;
Joerg Roedel17a703c2010-12-03 11:45:56 +01001495 mark_dirty(svm->vmcb, VMCB_DT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001496}
1497
Gleb Natapov89a27f42010-02-16 10:51:48 +02001498static void svm_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001499{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001500 struct vcpu_svm *svm = to_svm(vcpu);
1501
Gleb Natapov89a27f42010-02-16 10:51:48 +02001502 dt->size = svm->vmcb->save.gdtr.limit;
1503 dt->address = svm->vmcb->save.gdtr.base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001504}
1505
Gleb Natapov89a27f42010-02-16 10:51:48 +02001506static void svm_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001507{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001508 struct vcpu_svm *svm = to_svm(vcpu);
1509
Gleb Natapov89a27f42010-02-16 10:51:48 +02001510 svm->vmcb->save.gdtr.limit = dt->size;
1511 svm->vmcb->save.gdtr.base = dt->address ;
Joerg Roedel17a703c2010-12-03 11:45:56 +01001512 mark_dirty(svm->vmcb, VMCB_DT);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001513}
1514
Avi Kivitye8467fd2009-12-29 18:43:06 +02001515static void svm_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
1516{
1517}
1518
Avi Kivityaff48ba2010-12-05 18:56:11 +02001519static void svm_decache_cr3(struct kvm_vcpu *vcpu)
1520{
1521}
1522
Anthony Liguori25c4c272007-04-27 09:29:21 +03001523static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
Avi Kivity399badf2007-01-05 16:36:38 -08001524{
1525}
1526
Avi Kivityd2251572010-01-06 10:55:27 +02001527static void update_cr0_intercept(struct vcpu_svm *svm)
1528{
1529 ulong gcr0 = svm->vcpu.arch.cr0;
1530 u64 *hcr0 = &svm->vmcb->save.cr0;
1531
1532 if (!svm->vcpu.fpu_active)
1533 *hcr0 |= SVM_CR0_SELECTIVE_MASK;
1534 else
1535 *hcr0 = (*hcr0 & ~SVM_CR0_SELECTIVE_MASK)
1536 | (gcr0 & SVM_CR0_SELECTIVE_MASK);
1537
Joerg Roedeldcca1a62010-12-03 11:45:54 +01001538 mark_dirty(svm->vmcb, VMCB_CR);
Avi Kivityd2251572010-01-06 10:55:27 +02001539
1540 if (gcr0 == *hcr0 && svm->vcpu.fpu_active) {
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001541 clr_cr_intercept(svm, INTERCEPT_CR0_READ);
1542 clr_cr_intercept(svm, INTERCEPT_CR0_WRITE);
Avi Kivityd2251572010-01-06 10:55:27 +02001543 } else {
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01001544 set_cr_intercept(svm, INTERCEPT_CR0_READ);
1545 set_cr_intercept(svm, INTERCEPT_CR0_WRITE);
Avi Kivityd2251572010-01-06 10:55:27 +02001546 }
1547}
1548
Avi Kivity6aa8b732006-12-10 02:21:36 -08001549static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
1550{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001551 struct vcpu_svm *svm = to_svm(vcpu);
1552
Avi Kivity05b3e0c2006-12-13 00:33:45 -08001553#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +02001554 if (vcpu->arch.efer & EFER_LME) {
Rusty Russell707d92fa2007-07-17 23:19:08 +10001555 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
Avi Kivityf6801df2010-01-21 15:31:50 +02001556 vcpu->arch.efer |= EFER_LMA;
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -06001557 svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001558 }
1559
Mike Dayd77c26f2007-10-08 09:02:08 -04001560 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
Avi Kivityf6801df2010-01-21 15:31:50 +02001561 vcpu->arch.efer &= ~EFER_LMA;
Carlo Marcelo Arenas Belon2b5203e2007-12-01 06:17:11 -06001562 svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001563 }
1564 }
1565#endif
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001566 vcpu->arch.cr0 = cr0;
Avi Kivity888f9f32010-01-10 12:14:04 +02001567
1568 if (!npt_enabled)
1569 cr0 |= X86_CR0_PG | X86_CR0_WP;
Avi Kivity02daab22009-12-30 12:40:26 +02001570
1571 if (!vcpu->fpu_active)
Joerg Roedel334df502008-01-21 13:09:33 +01001572 cr0 |= X86_CR0_TS;
Joerg Roedel709ddeb2008-02-07 13:47:45 +01001573 /*
1574 * re-enable caching here because the QEMU bios
1575 * does not do it - this results in some delay at
1576 * reboot
1577 */
1578 cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001579 svm->vmcb->save.cr0 = cr0;
Joerg Roedeldcca1a62010-12-03 11:45:54 +01001580 mark_dirty(svm->vmcb, VMCB_CR);
Avi Kivityd2251572010-01-06 10:55:27 +02001581 update_cr0_intercept(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001582}
1583
Nadav Har'El5e1746d2011-05-25 23:03:24 +03001584static int svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001585{
Andy Lutomirski1e02ce42014-10-24 15:58:08 -07001586 unsigned long host_cr4_mce = cr4_read_shadow() & X86_CR4_MCE;
Joerg Roedele5eab0c2008-09-09 19:11:51 +02001587 unsigned long old_cr4 = to_svm(vcpu)->vmcb->save.cr4;
1588
Nadav Har'El5e1746d2011-05-25 23:03:24 +03001589 if (cr4 & X86_CR4_VMXE)
1590 return 1;
1591
Joerg Roedele5eab0c2008-09-09 19:11:51 +02001592 if (npt_enabled && ((old_cr4 ^ cr4) & X86_CR4_PGE))
Joerg Roedelf40f6a42010-12-03 15:25:15 +01001593 svm_flush_tlb(vcpu);
Joerg Roedel6394b642008-04-09 14:15:29 +02001594
Joerg Roedelec077262008-04-09 14:15:28 +02001595 vcpu->arch.cr4 = cr4;
1596 if (!npt_enabled)
1597 cr4 |= X86_CR4_PAE;
Joerg Roedel6394b642008-04-09 14:15:29 +02001598 cr4 |= host_cr4_mce;
Joerg Roedelec077262008-04-09 14:15:28 +02001599 to_svm(vcpu)->vmcb->save.cr4 = cr4;
Joerg Roedeldcca1a62010-12-03 11:45:54 +01001600 mark_dirty(to_svm(vcpu)->vmcb, VMCB_CR);
Nadav Har'El5e1746d2011-05-25 23:03:24 +03001601 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001602}
1603
1604static void svm_set_segment(struct kvm_vcpu *vcpu,
1605 struct kvm_segment *var, int seg)
1606{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001607 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001608 struct vmcb_seg *s = svm_seg(vcpu, seg);
1609
1610 s->base = var->base;
1611 s->limit = var->limit;
1612 s->selector = var->selector;
1613 if (var->unusable)
1614 s->attrib = 0;
1615 else {
1616 s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
1617 s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
1618 s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
1619 s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
1620 s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
1621 s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
1622 s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
1623 s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
1624 }
Paolo Bonziniae9fedc2014-05-14 09:39:49 +02001625
1626 /*
1627 * This is always accurate, except if SYSRET returned to a segment
1628 * with SS.DPL != 3. Intel does not have this quirk, and always
1629 * forces SS.DPL to 3 on sysret, so we ignore that case; fixing it
1630 * would entail passing the CPL to userspace and back.
1631 */
1632 if (seg == VCPU_SREG_SS)
1633 svm->vmcb->save.cpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001634
Joerg Roedel060d0c92010-12-03 11:45:57 +01001635 mark_dirty(svm->vmcb, VMCB_SEG);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001636}
1637
Jan Kiszkac8639012012-09-21 05:42:55 +02001638static void update_db_bp_intercept(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001639{
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001640 struct vcpu_svm *svm = to_svm(vcpu);
1641
Joerg Roedel18c918c2010-11-30 18:03:59 +01001642 clr_exception_intercept(svm, DB_VECTOR);
1643 clr_exception_intercept(svm, BP_VECTOR);
Gleb Natapov44c11432009-05-11 13:35:52 +03001644
Jan Kiszka6be7d302009-10-18 13:24:54 +02001645 if (svm->nmi_singlestep)
Joerg Roedel18c918c2010-11-30 18:03:59 +01001646 set_exception_intercept(svm, DB_VECTOR);
Gleb Natapov44c11432009-05-11 13:35:52 +03001647
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001648 if (vcpu->guest_debug & KVM_GUESTDBG_ENABLE) {
1649 if (vcpu->guest_debug &
1650 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
Joerg Roedel18c918c2010-11-30 18:03:59 +01001651 set_exception_intercept(svm, DB_VECTOR);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001652 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
Joerg Roedel18c918c2010-11-30 18:03:59 +01001653 set_exception_intercept(svm, BP_VECTOR);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001654 } else
1655 vcpu->guest_debug = 0;
Gleb Natapov44c11432009-05-11 13:35:52 +03001656}
1657
Tejun Heo0fe1e002009-10-29 22:34:14 +09001658static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001659{
Tejun Heo0fe1e002009-10-29 22:34:14 +09001660 if (sd->next_asid > sd->max_asid) {
1661 ++sd->asid_generation;
1662 sd->next_asid = 1;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001663 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001664 }
1665
Tejun Heo0fe1e002009-10-29 22:34:14 +09001666 svm->asid_generation = sd->asid_generation;
1667 svm->vmcb->control.asid = sd->next_asid++;
Joerg Roedeld48086d2010-12-03 11:45:51 +01001668
1669 mark_dirty(svm->vmcb, VMCB_ASID);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001670}
1671
Jan Kiszka73aaf249e2014-01-04 18:47:16 +01001672static u64 svm_get_dr6(struct kvm_vcpu *vcpu)
1673{
1674 return to_svm(vcpu)->vmcb->save.dr6;
1675}
1676
1677static void svm_set_dr6(struct kvm_vcpu *vcpu, unsigned long value)
1678{
1679 struct vcpu_svm *svm = to_svm(vcpu);
1680
1681 svm->vmcb->save.dr6 = value;
1682 mark_dirty(svm->vmcb, VMCB_DR);
1683}
1684
Paolo Bonzinifacb0132014-02-21 10:32:27 +01001685static void svm_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
1686{
1687 struct vcpu_svm *svm = to_svm(vcpu);
1688
1689 get_debugreg(vcpu->arch.db[0], 0);
1690 get_debugreg(vcpu->arch.db[1], 1);
1691 get_debugreg(vcpu->arch.db[2], 2);
1692 get_debugreg(vcpu->arch.db[3], 3);
1693 vcpu->arch.dr6 = svm_get_dr6(vcpu);
1694 vcpu->arch.dr7 = svm->vmcb->save.dr7;
1695
1696 vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT;
1697 set_dr_intercepts(svm);
1698}
1699
Gleb Natapov020df072010-04-13 10:05:23 +03001700static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001701{
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001702 struct vcpu_svm *svm = to_svm(vcpu);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01001703
Gleb Natapov020df072010-04-13 10:05:23 +03001704 svm->vmcb->save.dr7 = value;
Joerg Roedel72214b92010-12-03 11:45:55 +01001705 mark_dirty(svm->vmcb, VMCB_DR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001706}
1707
Avi Kivity851ba692009-08-24 11:10:17 +03001708static int pf_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001709{
Gleb Natapov631bc482010-10-14 11:22:52 +02001710 u64 fault_address = svm->vmcb->control.exit_info_2;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001711 u32 error_code;
Gleb Natapov631bc482010-10-14 11:22:52 +02001712 int r = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001713
Gleb Natapov631bc482010-10-14 11:22:52 +02001714 switch (svm->apf_reason) {
1715 default:
1716 error_code = svm->vmcb->control.exit_info_1;
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02001717
Gleb Natapov631bc482010-10-14 11:22:52 +02001718 trace_kvm_page_fault(fault_address, error_code);
1719 if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
1720 kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
Andre Przywaradc25e892010-12-21 11:12:07 +01001721 r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
1722 svm->vmcb->control.insn_bytes,
1723 svm->vmcb->control.insn_len);
Gleb Natapov631bc482010-10-14 11:22:52 +02001724 break;
1725 case KVM_PV_REASON_PAGE_NOT_PRESENT:
1726 svm->apf_reason = 0;
1727 local_irq_disable();
1728 kvm_async_pf_task_wait(fault_address);
1729 local_irq_enable();
1730 break;
1731 case KVM_PV_REASON_PAGE_READY:
1732 svm->apf_reason = 0;
1733 local_irq_disable();
1734 kvm_async_pf_task_wake(fault_address);
1735 local_irq_enable();
1736 break;
1737 }
1738 return r;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001739}
1740
Avi Kivity851ba692009-08-24 11:10:17 +03001741static int db_interception(struct vcpu_svm *svm)
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001742{
Avi Kivity851ba692009-08-24 11:10:17 +03001743 struct kvm_run *kvm_run = svm->vcpu.run;
1744
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001745 if (!(svm->vcpu.guest_debug &
Gleb Natapov44c11432009-05-11 13:35:52 +03001746 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) &&
Jan Kiszka6be7d302009-10-18 13:24:54 +02001747 !svm->nmi_singlestep) {
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001748 kvm_queue_exception(&svm->vcpu, DB_VECTOR);
1749 return 1;
1750 }
Gleb Natapov44c11432009-05-11 13:35:52 +03001751
Jan Kiszka6be7d302009-10-18 13:24:54 +02001752 if (svm->nmi_singlestep) {
1753 svm->nmi_singlestep = false;
Gleb Natapov44c11432009-05-11 13:35:52 +03001754 if (!(svm->vcpu.guest_debug & KVM_GUESTDBG_SINGLESTEP))
1755 svm->vmcb->save.rflags &=
1756 ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
Jan Kiszkac8639012012-09-21 05:42:55 +02001757 update_db_bp_intercept(&svm->vcpu);
Gleb Natapov44c11432009-05-11 13:35:52 +03001758 }
1759
1760 if (svm->vcpu.guest_debug &
Joerg Roedele0231712010-02-24 18:59:10 +01001761 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP)) {
Gleb Natapov44c11432009-05-11 13:35:52 +03001762 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1763 kvm_run->debug.arch.pc =
1764 svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1765 kvm_run->debug.arch.exception = DB_VECTOR;
1766 return 0;
1767 }
1768
1769 return 1;
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001770}
1771
Avi Kivity851ba692009-08-24 11:10:17 +03001772static int bp_interception(struct vcpu_svm *svm)
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001773{
Avi Kivity851ba692009-08-24 11:10:17 +03001774 struct kvm_run *kvm_run = svm->vcpu.run;
1775
Jan Kiszkad0bfb942008-12-15 13:52:10 +01001776 kvm_run->exit_reason = KVM_EXIT_DEBUG;
1777 kvm_run->debug.arch.pc = svm->vmcb->save.cs.base + svm->vmcb->save.rip;
1778 kvm_run->debug.arch.exception = BP_VECTOR;
1779 return 0;
1780}
1781
Avi Kivity851ba692009-08-24 11:10:17 +03001782static int ud_interception(struct vcpu_svm *svm)
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001783{
1784 int er;
1785
Andre Przywara51d8b662010-12-21 11:12:02 +01001786 er = emulate_instruction(&svm->vcpu, EMULTYPE_TRAP_UD);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001787 if (er != EMULATE_DONE)
Avi Kivity7ee5d9402007-11-25 15:22:50 +02001788 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001789 return 1;
1790}
1791
Avi Kivity6b52d182010-01-21 15:31:47 +02001792static void svm_fpu_activate(struct kvm_vcpu *vcpu)
Anthony Liguori7807fa62007-04-23 09:17:21 -05001793{
Avi Kivity6b52d182010-01-21 15:31:47 +02001794 struct vcpu_svm *svm = to_svm(vcpu);
Joerg Roedel66a562f2010-02-19 16:23:08 +01001795
Joerg Roedel18c918c2010-11-30 18:03:59 +01001796 clr_exception_intercept(svm, NM_VECTOR);
Joerg Roedel66a562f2010-02-19 16:23:08 +01001797
Rusty Russelle756fc62007-07-30 20:07:08 +10001798 svm->vcpu.fpu_active = 1;
Avi Kivityd2251572010-01-06 10:55:27 +02001799 update_cr0_intercept(svm);
Avi Kivity6b52d182010-01-21 15:31:47 +02001800}
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001801
Avi Kivity6b52d182010-01-21 15:31:47 +02001802static int nm_interception(struct vcpu_svm *svm)
1803{
1804 svm_fpu_activate(&svm->vcpu);
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001805 return 1;
Anthony Liguori7807fa62007-04-23 09:17:21 -05001806}
1807
Joerg Roedel67ec6602010-05-17 14:43:35 +02001808static bool is_erratum_383(void)
1809{
1810 int err, i;
1811 u64 value;
1812
1813 if (!erratum_383_found)
1814 return false;
1815
1816 value = native_read_msr_safe(MSR_IA32_MC0_STATUS, &err);
1817 if (err)
1818 return false;
1819
1820 /* Bit 62 may or may not be set for this mce */
1821 value &= ~(1ULL << 62);
1822
1823 if (value != 0xb600000000010015ULL)
1824 return false;
1825
1826 /* Clear MCi_STATUS registers */
1827 for (i = 0; i < 6; ++i)
1828 native_write_msr_safe(MSR_IA32_MCx_STATUS(i), 0, 0);
1829
1830 value = native_read_msr_safe(MSR_IA32_MCG_STATUS, &err);
1831 if (!err) {
1832 u32 low, high;
1833
1834 value &= ~(1ULL << 2);
1835 low = lower_32_bits(value);
1836 high = upper_32_bits(value);
1837
1838 native_write_msr_safe(MSR_IA32_MCG_STATUS, low, high);
1839 }
1840
1841 /* Flush tlb to evict multi-match entries */
1842 __flush_tlb_all();
1843
1844 return true;
1845}
1846
Joerg Roedelfe5913e2010-05-17 14:43:34 +02001847static void svm_handle_mce(struct vcpu_svm *svm)
Joerg Roedel53371b52008-04-09 14:15:30 +02001848{
Joerg Roedel67ec6602010-05-17 14:43:35 +02001849 if (is_erratum_383()) {
1850 /*
1851 * Erratum 383 triggered. Guest state is corrupt so kill the
1852 * guest.
1853 */
1854 pr_err("KVM: Guest triggered AMD Erratum 383\n");
1855
Avi Kivitya8eeb042010-05-10 12:34:53 +03001856 kvm_make_request(KVM_REQ_TRIPLE_FAULT, &svm->vcpu);
Joerg Roedel67ec6602010-05-17 14:43:35 +02001857
1858 return;
1859 }
1860
Joerg Roedel53371b52008-04-09 14:15:30 +02001861 /*
1862 * On an #MC intercept the MCE handler is not called automatically in
1863 * the host. So do it by hand here.
1864 */
1865 asm volatile (
1866 "int $0x12\n");
1867 /* not sure if we ever come back to this point */
1868
Joerg Roedelfe5913e2010-05-17 14:43:34 +02001869 return;
1870}
1871
1872static int mc_interception(struct vcpu_svm *svm)
1873{
Joerg Roedel53371b52008-04-09 14:15:30 +02001874 return 1;
1875}
1876
Avi Kivity851ba692009-08-24 11:10:17 +03001877static int shutdown_interception(struct vcpu_svm *svm)
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001878{
Avi Kivity851ba692009-08-24 11:10:17 +03001879 struct kvm_run *kvm_run = svm->vcpu.run;
1880
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001881 /*
1882 * VMCB is undefined after a SHUTDOWN intercept
1883 * so reinitialize it.
1884 */
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04001885 clear_page(svm->vmcb);
Joerg Roedele6101a92008-02-13 18:58:45 +01001886 init_vmcb(svm);
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08001887
1888 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
1889 return 0;
1890}
1891
Avi Kivity851ba692009-08-24 11:10:17 +03001892static int io_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001893{
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001894 struct kvm_vcpu *vcpu = &svm->vcpu;
Mike Dayd77c26f2007-10-08 09:02:08 -04001895 u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
Jan Kiszka34c33d12009-02-08 13:28:15 +01001896 int size, in, string;
Avi Kivity039576c2007-03-20 12:46:50 +02001897 unsigned port;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001898
Rusty Russelle756fc62007-07-30 20:07:08 +10001899 ++svm->vcpu.stat.io_exits;
Laurent Viviere70669a2007-08-05 10:36:40 +03001900 string = (io_info & SVM_IOIO_STR_MASK) != 0;
Avi Kivity039576c2007-03-20 12:46:50 +02001901 in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001902 if (string || in)
Andre Przywara51d8b662010-12-21 11:12:02 +01001903 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001904
Avi Kivity039576c2007-03-20 12:46:50 +02001905 port = io_info >> 16;
1906 size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001907 svm->next_rip = svm->vmcb->control.exit_info_2;
Guillaume Thouvenine93f36b2008-10-28 10:51:30 +01001908 skip_emulated_instruction(&svm->vcpu);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02001909
1910 return kvm_fast_pio_out(vcpu, size, port);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001911}
1912
Avi Kivity851ba692009-08-24 11:10:17 +03001913static int nmi_interception(struct vcpu_svm *svm)
Joerg Roedelc47f0982008-04-30 17:56:00 +02001914{
1915 return 1;
1916}
1917
Avi Kivity851ba692009-08-24 11:10:17 +03001918static int intr_interception(struct vcpu_svm *svm)
Joerg Roedela0698052008-04-30 17:56:01 +02001919{
1920 ++svm->vcpu.stat.irq_exits;
1921 return 1;
1922}
1923
Avi Kivity851ba692009-08-24 11:10:17 +03001924static int nop_on_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001925{
1926 return 1;
1927}
1928
Avi Kivity851ba692009-08-24 11:10:17 +03001929static int halt_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001930{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001931 svm->next_rip = kvm_rip_read(&svm->vcpu) + 1;
Rusty Russelle756fc62007-07-30 20:07:08 +10001932 return kvm_emulate_halt(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001933}
1934
Avi Kivity851ba692009-08-24 11:10:17 +03001935static int vmmcall_interception(struct vcpu_svm *svm)
Avi Kivity02e235b2007-02-19 14:37:47 +02001936{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03001937 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05001938 kvm_emulate_hypercall(&svm->vcpu);
1939 return 1;
Avi Kivity02e235b2007-02-19 14:37:47 +02001940}
1941
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001942static unsigned long nested_svm_get_tdp_cr3(struct kvm_vcpu *vcpu)
1943{
1944 struct vcpu_svm *svm = to_svm(vcpu);
1945
1946 return svm->nested.nested_cr3;
1947}
1948
Avi Kivitye4e517b2011-07-28 11:36:17 +03001949static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index)
1950{
1951 struct vcpu_svm *svm = to_svm(vcpu);
1952 u64 cr3 = svm->nested.nested_cr3;
1953 u64 pdpte;
1954 int ret;
1955
1956 ret = kvm_read_guest_page(vcpu->kvm, gpa_to_gfn(cr3), &pdpte,
1957 offset_in_page(cr3) + index * 8, 8);
1958 if (ret)
1959 return 0;
1960 return pdpte;
1961}
1962
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001963static void nested_svm_set_tdp_cr3(struct kvm_vcpu *vcpu,
1964 unsigned long root)
1965{
1966 struct vcpu_svm *svm = to_svm(vcpu);
1967
1968 svm->vmcb->control.nested_cr3 = root;
Joerg Roedelb2747162010-12-03 11:45:53 +01001969 mark_dirty(svm->vmcb, VMCB_NPT);
Joerg Roedelf40f6a42010-12-03 15:25:15 +01001970 svm_flush_tlb(vcpu);
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001971}
1972
Avi Kivity6389ee92010-11-29 16:12:30 +02001973static void nested_svm_inject_npf_exit(struct kvm_vcpu *vcpu,
1974 struct x86_exception *fault)
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001975{
1976 struct vcpu_svm *svm = to_svm(vcpu);
1977
Paolo Bonzini5e352512014-09-02 13:18:37 +02001978 if (svm->vmcb->control.exit_code != SVM_EXIT_NPF) {
1979 /*
1980 * TODO: track the cause of the nested page fault, and
1981 * correctly fill in the high bits of exit_info_1.
1982 */
1983 svm->vmcb->control.exit_code = SVM_EXIT_NPF;
1984 svm->vmcb->control.exit_code_hi = 0;
1985 svm->vmcb->control.exit_info_1 = (1ULL << 32);
1986 svm->vmcb->control.exit_info_2 = fault->address;
1987 }
1988
1989 svm->vmcb->control.exit_info_1 &= ~0xffffffffULL;
1990 svm->vmcb->control.exit_info_1 |= fault->error_code;
1991
1992 /*
1993 * The present bit is always zero for page structure faults on real
1994 * hardware.
1995 */
1996 if (svm->vmcb->control.exit_info_1 & (2ULL << 32))
1997 svm->vmcb->control.exit_info_1 &= ~1;
Joerg Roedel5bd2edc2010-09-10 17:31:02 +02001998
1999 nested_svm_vmexit(svm);
2000}
2001
Paolo Bonzini8a3c1a332013-10-02 16:56:13 +02002002static void nested_svm_init_mmu_context(struct kvm_vcpu *vcpu)
Joerg Roedel4b161842010-09-10 17:31:03 +02002003{
Paolo Bonziniad896af2013-10-02 16:56:14 +02002004 WARN_ON(mmu_is_nested(vcpu));
2005 kvm_init_shadow_mmu(vcpu);
Joerg Roedel4b161842010-09-10 17:31:03 +02002006 vcpu->arch.mmu.set_cr3 = nested_svm_set_tdp_cr3;
2007 vcpu->arch.mmu.get_cr3 = nested_svm_get_tdp_cr3;
Avi Kivitye4e517b2011-07-28 11:36:17 +03002008 vcpu->arch.mmu.get_pdptr = nested_svm_get_tdp_pdptr;
Joerg Roedel4b161842010-09-10 17:31:03 +02002009 vcpu->arch.mmu.inject_page_fault = nested_svm_inject_npf_exit;
2010 vcpu->arch.mmu.shadow_root_level = get_npt_level();
2011 vcpu->arch.walk_mmu = &vcpu->arch.nested_mmu;
Joerg Roedel4b161842010-09-10 17:31:03 +02002012}
2013
2014static void nested_svm_uninit_mmu_context(struct kvm_vcpu *vcpu)
2015{
2016 vcpu->arch.walk_mmu = &vcpu->arch.mmu;
2017}
2018
Alexander Grafc0725422008-11-25 20:17:03 +01002019static int nested_svm_check_permissions(struct vcpu_svm *svm)
2020{
Avi Kivityf6801df2010-01-21 15:31:50 +02002021 if (!(svm->vcpu.arch.efer & EFER_SVME)
Alexander Grafc0725422008-11-25 20:17:03 +01002022 || !is_paging(&svm->vcpu)) {
2023 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2024 return 1;
2025 }
2026
2027 if (svm->vmcb->save.cpl) {
2028 kvm_inject_gp(&svm->vcpu, 0);
2029 return 1;
2030 }
2031
2032 return 0;
2033}
2034
Alexander Grafcf74a782008-11-25 20:17:08 +01002035static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
2036 bool has_error_code, u32 error_code)
2037{
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002038 int vmexit;
2039
Joerg Roedel20307532010-11-29 17:51:48 +01002040 if (!is_guest_mode(&svm->vcpu))
Joerg Roedel0295ad72009-08-07 11:49:37 +02002041 return 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01002042
Joerg Roedel0295ad72009-08-07 11:49:37 +02002043 svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
2044 svm->vmcb->control.exit_code_hi = 0;
2045 svm->vmcb->control.exit_info_1 = error_code;
2046 svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
2047
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002048 vmexit = nested_svm_intercept(svm);
2049 if (vmexit == NESTED_EXIT_DONE)
2050 svm->nested.exit_required = true;
2051
2052 return vmexit;
Alexander Grafcf74a782008-11-25 20:17:08 +01002053}
2054
Joerg Roedel8fe54652010-02-19 16:23:01 +01002055/* This function returns true if it is save to enable the irq window */
2056static inline bool nested_svm_intr(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002057{
Joerg Roedel20307532010-11-29 17:51:48 +01002058 if (!is_guest_mode(&svm->vcpu))
Joerg Roedel8fe54652010-02-19 16:23:01 +01002059 return true;
Alexander Grafcf74a782008-11-25 20:17:08 +01002060
Joerg Roedel26666952009-08-07 11:49:46 +02002061 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
Joerg Roedel8fe54652010-02-19 16:23:01 +01002062 return true;
Alexander Grafcf74a782008-11-25 20:17:08 +01002063
Joerg Roedel26666952009-08-07 11:49:46 +02002064 if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
Joerg Roedel8fe54652010-02-19 16:23:01 +01002065 return false;
Alexander Grafcf74a782008-11-25 20:17:08 +01002066
Gleb Natapova0a07cd2010-09-20 10:15:32 +02002067 /*
2068 * if vmexit was already requested (by intercepted exception
2069 * for instance) do not overwrite it with "external interrupt"
2070 * vmexit.
2071 */
2072 if (svm->nested.exit_required)
2073 return false;
2074
Joerg Roedel197717d2010-02-24 18:59:19 +01002075 svm->vmcb->control.exit_code = SVM_EXIT_INTR;
2076 svm->vmcb->control.exit_info_1 = 0;
2077 svm->vmcb->control.exit_info_2 = 0;
Joerg Roedel26666952009-08-07 11:49:46 +02002078
Joerg Roedelcd3ff652009-10-09 16:08:26 +02002079 if (svm->nested.intercept & 1ULL) {
2080 /*
2081 * The #vmexit can't be emulated here directly because this
Guo Chaoc5ec2e52012-06-28 15:16:43 +08002082 * code path runs with irqs and preemption disabled. A
Joerg Roedelcd3ff652009-10-09 16:08:26 +02002083 * #vmexit emulation might sleep. Only signal request for
2084 * the #vmexit here.
2085 */
2086 svm->nested.exit_required = true;
Joerg Roedel236649d2009-10-09 16:08:30 +02002087 trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
Joerg Roedel8fe54652010-02-19 16:23:01 +01002088 return false;
Alexander Grafcf74a782008-11-25 20:17:08 +01002089 }
2090
Joerg Roedel8fe54652010-02-19 16:23:01 +01002091 return true;
Alexander Grafcf74a782008-11-25 20:17:08 +01002092}
2093
Joerg Roedel887f5002010-02-24 18:59:12 +01002094/* This function returns true if it is save to enable the nmi window */
2095static inline bool nested_svm_nmi(struct vcpu_svm *svm)
2096{
Joerg Roedel20307532010-11-29 17:51:48 +01002097 if (!is_guest_mode(&svm->vcpu))
Joerg Roedel887f5002010-02-24 18:59:12 +01002098 return true;
2099
2100 if (!(svm->nested.intercept & (1ULL << INTERCEPT_NMI)))
2101 return true;
2102
2103 svm->vmcb->control.exit_code = SVM_EXIT_NMI;
2104 svm->nested.exit_required = true;
2105
2106 return false;
2107}
2108
Joerg Roedel7597f122010-02-19 16:23:00 +01002109static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002110{
2111 struct page *page;
2112
Joerg Roedel6c3bd3d2010-02-19 16:23:04 +01002113 might_sleep();
2114
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002115 page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT);
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002116 if (is_error_page(page))
2117 goto error;
2118
Joerg Roedel7597f122010-02-19 16:23:00 +01002119 *_page = page;
2120
2121 return kmap(page);
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002122
2123error:
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002124 kvm_inject_gp(&svm->vcpu, 0);
2125
2126 return NULL;
2127}
2128
Joerg Roedel7597f122010-02-19 16:23:00 +01002129static void nested_svm_unmap(struct page *page)
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002130{
Joerg Roedel7597f122010-02-19 16:23:00 +01002131 kunmap(page);
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002132 kvm_release_page_dirty(page);
2133}
2134
Joerg Roedelce2ac082010-03-01 15:34:39 +01002135static int nested_svm_intercept_ioio(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002136{
Jan Kiszka9bf41832014-06-30 10:54:17 +02002137 unsigned port, size, iopm_len;
2138 u16 val, mask;
2139 u8 start_bit;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002140 u64 gpa;
2141
2142 if (!(svm->nested.intercept & (1ULL << INTERCEPT_IOIO_PROT)))
2143 return NESTED_EXIT_HOST;
2144
2145 port = svm->vmcb->control.exit_info_1 >> 16;
Jan Kiszka9bf41832014-06-30 10:54:17 +02002146 size = (svm->vmcb->control.exit_info_1 & SVM_IOIO_SIZE_MASK) >>
2147 SVM_IOIO_SIZE_SHIFT;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002148 gpa = svm->nested.vmcb_iopm + (port / 8);
Jan Kiszka9bf41832014-06-30 10:54:17 +02002149 start_bit = port % 8;
2150 iopm_len = (start_bit + size > 8) ? 2 : 1;
2151 mask = (0xf >> (4 - size)) << start_bit;
2152 val = 0;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002153
Jan Kiszka9bf41832014-06-30 10:54:17 +02002154 if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, iopm_len))
2155 return NESTED_EXIT_DONE;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002156
Jan Kiszka9bf41832014-06-30 10:54:17 +02002157 return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002158}
2159
Joerg Roedeld2477822010-03-01 15:34:34 +01002160static int nested_svm_exit_handled_msr(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002161{
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002162 u32 offset, msr, value;
2163 int write, mask;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002164
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002165 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
Joerg Roedeld2477822010-03-01 15:34:34 +01002166 return NESTED_EXIT_HOST;
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002167
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002168 msr = svm->vcpu.arch.regs[VCPU_REGS_RCX];
2169 offset = svm_msrpm_offset(msr);
2170 write = svm->vmcb->control.exit_info_1 & 1;
2171 mask = 1 << ((2 * (msr & 0xf)) + write);
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002172
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002173 if (offset == MSR_INVALID)
2174 return NESTED_EXIT_DONE;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002175
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002176 /* Offset is in 32 bit units but need in 8 bit units */
2177 offset *= 4;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002178
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002179 if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4))
2180 return NESTED_EXIT_DONE;
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002181
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002182 return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002183}
2184
Joerg Roedel410e4d52009-08-07 11:49:44 +02002185static int nested_svm_exit_special(struct vcpu_svm *svm)
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002186{
Alexander Grafcf74a782008-11-25 20:17:08 +01002187 u32 exit_code = svm->vmcb->control.exit_code;
Joerg Roedel4c2161a2009-08-07 11:49:35 +02002188
Joerg Roedel410e4d52009-08-07 11:49:44 +02002189 switch (exit_code) {
2190 case SVM_EXIT_INTR:
2191 case SVM_EXIT_NMI:
Joerg Roedelff47a492010-04-22 12:33:14 +02002192 case SVM_EXIT_EXCP_BASE + MC_VECTOR:
Joerg Roedel410e4d52009-08-07 11:49:44 +02002193 return NESTED_EXIT_HOST;
Joerg Roedel410e4d52009-08-07 11:49:44 +02002194 case SVM_EXIT_NPF:
Joerg Roedele0231712010-02-24 18:59:10 +01002195 /* For now we are always handling NPFs when using them */
Joerg Roedel410e4d52009-08-07 11:49:44 +02002196 if (npt_enabled)
2197 return NESTED_EXIT_HOST;
2198 break;
Joerg Roedel410e4d52009-08-07 11:49:44 +02002199 case SVM_EXIT_EXCP_BASE + PF_VECTOR:
Gleb Natapov631bc482010-10-14 11:22:52 +02002200 /* When we're shadowing, trap PFs, but not async PF */
2201 if (!npt_enabled && svm->apf_reason == 0)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002202 return NESTED_EXIT_HOST;
2203 break;
Joerg Roedel66a562f2010-02-19 16:23:08 +01002204 case SVM_EXIT_EXCP_BASE + NM_VECTOR:
2205 nm_interception(svm);
2206 break;
Joerg Roedel410e4d52009-08-07 11:49:44 +02002207 default:
2208 break;
Alexander Grafcf74a782008-11-25 20:17:08 +01002209 }
2210
Joerg Roedel410e4d52009-08-07 11:49:44 +02002211 return NESTED_EXIT_CONTINUE;
2212}
2213
2214/*
2215 * If this function returns true, this #vmexit was already handled
2216 */
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002217static int nested_svm_intercept(struct vcpu_svm *svm)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002218{
2219 u32 exit_code = svm->vmcb->control.exit_code;
2220 int vmexit = NESTED_EXIT_HOST;
2221
Alexander Grafcf74a782008-11-25 20:17:08 +01002222 switch (exit_code) {
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02002223 case SVM_EXIT_MSR:
Joerg Roedel3d62d9a2009-08-07 11:49:39 +02002224 vmexit = nested_svm_exit_handled_msr(svm);
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02002225 break;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002226 case SVM_EXIT_IOIO:
2227 vmexit = nested_svm_intercept_ioio(svm);
2228 break;
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002229 case SVM_EXIT_READ_CR0 ... SVM_EXIT_WRITE_CR8: {
2230 u32 bit = 1U << (exit_code - SVM_EXIT_READ_CR0);
2231 if (svm->nested.intercept_cr & bit)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002232 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002233 break;
2234 }
Joerg Roedel3aed0412010-11-30 18:03:58 +01002235 case SVM_EXIT_READ_DR0 ... SVM_EXIT_WRITE_DR7: {
2236 u32 bit = 1U << (exit_code - SVM_EXIT_READ_DR0);
2237 if (svm->nested.intercept_dr & bit)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002238 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002239 break;
2240 }
2241 case SVM_EXIT_EXCP_BASE ... SVM_EXIT_EXCP_BASE + 0x1f: {
2242 u32 excp_bits = 1 << (exit_code - SVM_EXIT_EXCP_BASE);
Joerg Roedelaad42c62009-08-07 11:49:34 +02002243 if (svm->nested.intercept_exceptions & excp_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002244 vmexit = NESTED_EXIT_DONE;
Gleb Natapov631bc482010-10-14 11:22:52 +02002245 /* async page fault always cause vmexit */
2246 else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
2247 svm->apf_reason != 0)
2248 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002249 break;
2250 }
Joerg Roedel228070b2010-04-22 12:33:10 +02002251 case SVM_EXIT_ERR: {
2252 vmexit = NESTED_EXIT_DONE;
2253 break;
2254 }
Alexander Grafcf74a782008-11-25 20:17:08 +01002255 default: {
2256 u64 exit_bits = 1ULL << (exit_code - SVM_EXIT_INTR);
Joerg Roedelaad42c62009-08-07 11:49:34 +02002257 if (svm->nested.intercept & exit_bits)
Joerg Roedel410e4d52009-08-07 11:49:44 +02002258 vmexit = NESTED_EXIT_DONE;
Alexander Grafcf74a782008-11-25 20:17:08 +01002259 }
2260 }
2261
Joerg Roedelb8e88bc2010-02-19 16:23:02 +01002262 return vmexit;
2263}
2264
2265static int nested_svm_exit_handled(struct vcpu_svm *svm)
2266{
2267 int vmexit;
2268
2269 vmexit = nested_svm_intercept(svm);
2270
2271 if (vmexit == NESTED_EXIT_DONE)
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02002272 nested_svm_vmexit(svm);
Joerg Roedel9c4e40b92009-08-07 11:49:36 +02002273
2274 return vmexit;
Alexander Grafcf74a782008-11-25 20:17:08 +01002275}
2276
Joerg Roedel0460a972009-08-07 11:49:31 +02002277static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *from_vmcb)
2278{
2279 struct vmcb_control_area *dst = &dst_vmcb->control;
2280 struct vmcb_control_area *from = &from_vmcb->control;
2281
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002282 dst->intercept_cr = from->intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +01002283 dst->intercept_dr = from->intercept_dr;
Joerg Roedel0460a972009-08-07 11:49:31 +02002284 dst->intercept_exceptions = from->intercept_exceptions;
2285 dst->intercept = from->intercept;
2286 dst->iopm_base_pa = from->iopm_base_pa;
2287 dst->msrpm_base_pa = from->msrpm_base_pa;
2288 dst->tsc_offset = from->tsc_offset;
2289 dst->asid = from->asid;
2290 dst->tlb_ctl = from->tlb_ctl;
2291 dst->int_ctl = from->int_ctl;
2292 dst->int_vector = from->int_vector;
2293 dst->int_state = from->int_state;
2294 dst->exit_code = from->exit_code;
2295 dst->exit_code_hi = from->exit_code_hi;
2296 dst->exit_info_1 = from->exit_info_1;
2297 dst->exit_info_2 = from->exit_info_2;
2298 dst->exit_int_info = from->exit_int_info;
2299 dst->exit_int_info_err = from->exit_int_info_err;
2300 dst->nested_ctl = from->nested_ctl;
2301 dst->event_inj = from->event_inj;
2302 dst->event_inj_err = from->event_inj_err;
2303 dst->nested_cr3 = from->nested_cr3;
2304 dst->lbr_ctl = from->lbr_ctl;
2305}
2306
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002307static int nested_svm_vmexit(struct vcpu_svm *svm)
Alexander Grafcf74a782008-11-25 20:17:08 +01002308{
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002309 struct vmcb *nested_vmcb;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002310 struct vmcb *hsave = svm->nested.hsave;
Joerg Roedel33740e42009-08-07 11:49:29 +02002311 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002312 struct page *page;
Alexander Grafcf74a782008-11-25 20:17:08 +01002313
Joerg Roedel17897f32009-10-09 16:08:29 +02002314 trace_kvm_nested_vmexit_inject(vmcb->control.exit_code,
2315 vmcb->control.exit_info_1,
2316 vmcb->control.exit_info_2,
2317 vmcb->control.exit_int_info,
Stefan Hajnoczie097e5f2011-07-22 12:46:52 +01002318 vmcb->control.exit_int_info_err,
2319 KVM_ISA_SVM);
Joerg Roedel17897f32009-10-09 16:08:29 +02002320
Joerg Roedel7597f122010-02-19 16:23:00 +01002321 nested_vmcb = nested_svm_map(svm, svm->nested.vmcb, &page);
Joerg Roedel34f80cf2009-08-07 11:49:38 +02002322 if (!nested_vmcb)
2323 return 1;
2324
Joerg Roedel20307532010-11-29 17:51:48 +01002325 /* Exit Guest-Mode */
2326 leave_guest_mode(&svm->vcpu);
Joerg Roedel06fc77722010-02-19 16:23:07 +01002327 svm->nested.vmcb = 0;
2328
Alexander Grafcf74a782008-11-25 20:17:08 +01002329 /* Give the current vmcb to the guest */
Joerg Roedel33740e42009-08-07 11:49:29 +02002330 disable_gif(svm);
2331
2332 nested_vmcb->save.es = vmcb->save.es;
2333 nested_vmcb->save.cs = vmcb->save.cs;
2334 nested_vmcb->save.ss = vmcb->save.ss;
2335 nested_vmcb->save.ds = vmcb->save.ds;
2336 nested_vmcb->save.gdtr = vmcb->save.gdtr;
2337 nested_vmcb->save.idtr = vmcb->save.idtr;
Joerg Roedel3f6a9d12010-07-27 18:14:20 +02002338 nested_vmcb->save.efer = svm->vcpu.arch.efer;
Joerg Roedelcdbbdc12010-02-19 16:23:03 +01002339 nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
Avi Kivity9f8fe502010-12-05 17:30:00 +02002340 nested_vmcb->save.cr3 = kvm_read_cr3(&svm->vcpu);
Joerg Roedel33740e42009-08-07 11:49:29 +02002341 nested_vmcb->save.cr2 = vmcb->save.cr2;
Joerg Roedelcdbbdc12010-02-19 16:23:03 +01002342 nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
Avi Kivityf6e78472010-08-02 15:30:20 +03002343 nested_vmcb->save.rflags = kvm_get_rflags(&svm->vcpu);
Joerg Roedel33740e42009-08-07 11:49:29 +02002344 nested_vmcb->save.rip = vmcb->save.rip;
2345 nested_vmcb->save.rsp = vmcb->save.rsp;
2346 nested_vmcb->save.rax = vmcb->save.rax;
2347 nested_vmcb->save.dr7 = vmcb->save.dr7;
2348 nested_vmcb->save.dr6 = vmcb->save.dr6;
2349 nested_vmcb->save.cpl = vmcb->save.cpl;
2350
2351 nested_vmcb->control.int_ctl = vmcb->control.int_ctl;
2352 nested_vmcb->control.int_vector = vmcb->control.int_vector;
2353 nested_vmcb->control.int_state = vmcb->control.int_state;
2354 nested_vmcb->control.exit_code = vmcb->control.exit_code;
2355 nested_vmcb->control.exit_code_hi = vmcb->control.exit_code_hi;
2356 nested_vmcb->control.exit_info_1 = vmcb->control.exit_info_1;
2357 nested_vmcb->control.exit_info_2 = vmcb->control.exit_info_2;
2358 nested_vmcb->control.exit_int_info = vmcb->control.exit_int_info;
2359 nested_vmcb->control.exit_int_info_err = vmcb->control.exit_int_info_err;
Joerg Roedel7a190662010-07-27 18:14:21 +02002360 nested_vmcb->control.next_rip = vmcb->control.next_rip;
Alexander Graf8d23c462009-10-09 16:08:25 +02002361
2362 /*
2363 * If we emulate a VMRUN/#VMEXIT in the same host #vmexit cycle we have
2364 * to make sure that we do not lose injected events. So check event_inj
2365 * here and copy it to exit_int_info if it is valid.
2366 * Exit_int_info and event_inj can't be both valid because the case
2367 * below only happens on a VMRUN instruction intercept which has
2368 * no valid exit_int_info set.
2369 */
2370 if (vmcb->control.event_inj & SVM_EVTINJ_VALID) {
2371 struct vmcb_control_area *nc = &nested_vmcb->control;
2372
2373 nc->exit_int_info = vmcb->control.event_inj;
2374 nc->exit_int_info_err = vmcb->control.event_inj_err;
2375 }
2376
Joerg Roedel33740e42009-08-07 11:49:29 +02002377 nested_vmcb->control.tlb_ctl = 0;
2378 nested_vmcb->control.event_inj = 0;
2379 nested_vmcb->control.event_inj_err = 0;
Alexander Grafcf74a782008-11-25 20:17:08 +01002380
2381 /* We always set V_INTR_MASKING and remember the old value in hflags */
2382 if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
2383 nested_vmcb->control.int_ctl &= ~V_INTR_MASKING_MASK;
2384
Alexander Grafcf74a782008-11-25 20:17:08 +01002385 /* Restore the original control entries */
Joerg Roedel0460a972009-08-07 11:49:31 +02002386 copy_vmcb_control_area(vmcb, hsave);
Alexander Grafcf74a782008-11-25 20:17:08 +01002387
Alexander Graf219b65d2009-06-15 15:21:25 +02002388 kvm_clear_exception_queue(&svm->vcpu);
2389 kvm_clear_interrupt_queue(&svm->vcpu);
Alexander Grafcf74a782008-11-25 20:17:08 +01002390
Joerg Roedel4b161842010-09-10 17:31:03 +02002391 svm->nested.nested_cr3 = 0;
2392
Alexander Grafcf74a782008-11-25 20:17:08 +01002393 /* Restore selected save entries */
2394 svm->vmcb->save.es = hsave->save.es;
2395 svm->vmcb->save.cs = hsave->save.cs;
2396 svm->vmcb->save.ss = hsave->save.ss;
2397 svm->vmcb->save.ds = hsave->save.ds;
2398 svm->vmcb->save.gdtr = hsave->save.gdtr;
2399 svm->vmcb->save.idtr = hsave->save.idtr;
Avi Kivityf6e78472010-08-02 15:30:20 +03002400 kvm_set_rflags(&svm->vcpu, hsave->save.rflags);
Alexander Grafcf74a782008-11-25 20:17:08 +01002401 svm_set_efer(&svm->vcpu, hsave->save.efer);
2402 svm_set_cr0(&svm->vcpu, hsave->save.cr0 | X86_CR0_PE);
2403 svm_set_cr4(&svm->vcpu, hsave->save.cr4);
2404 if (npt_enabled) {
2405 svm->vmcb->save.cr3 = hsave->save.cr3;
2406 svm->vcpu.arch.cr3 = hsave->save.cr3;
2407 } else {
Avi Kivity23902182010-06-10 17:02:16 +03002408 (void)kvm_set_cr3(&svm->vcpu, hsave->save.cr3);
Alexander Grafcf74a782008-11-25 20:17:08 +01002409 }
2410 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, hsave->save.rax);
2411 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, hsave->save.rsp);
2412 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, hsave->save.rip);
2413 svm->vmcb->save.dr7 = 0;
2414 svm->vmcb->save.cpl = 0;
2415 svm->vmcb->control.exit_int_info = 0;
2416
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01002417 mark_all_dirty(svm->vmcb);
2418
Joerg Roedel7597f122010-02-19 16:23:00 +01002419 nested_svm_unmap(page);
Alexander Grafcf74a782008-11-25 20:17:08 +01002420
Joerg Roedel4b161842010-09-10 17:31:03 +02002421 nested_svm_uninit_mmu_context(&svm->vcpu);
Alexander Grafcf74a782008-11-25 20:17:08 +01002422 kvm_mmu_reset_context(&svm->vcpu);
2423 kvm_mmu_load(&svm->vcpu);
2424
2425 return 0;
2426}
Alexander Graf3d6368e2008-11-25 20:17:07 +01002427
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002428static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002429{
Joerg Roedel323c3d82010-03-01 15:34:37 +01002430 /*
2431 * This function merges the msr permission bitmaps of kvm and the
Guo Chaoc5ec2e52012-06-28 15:16:43 +08002432 * nested vmcb. It is optimized in that it only merges the parts where
Joerg Roedel323c3d82010-03-01 15:34:37 +01002433 * the kvm msr permission bitmap may contain zero bits
2434 */
Alexander Graf3d6368e2008-11-25 20:17:07 +01002435 int i;
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002436
Joerg Roedel323c3d82010-03-01 15:34:37 +01002437 if (!(svm->nested.intercept & (1ULL << INTERCEPT_MSR_PROT)))
2438 return true;
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002439
Joerg Roedel323c3d82010-03-01 15:34:37 +01002440 for (i = 0; i < MSRPM_OFFSETS; i++) {
2441 u32 value, p;
2442 u64 offset;
2443
2444 if (msrpm_offsets[i] == 0xffffffff)
2445 break;
2446
Joerg Roedel0d6b3532010-03-01 15:34:38 +01002447 p = msrpm_offsets[i];
2448 offset = svm->nested.vmcb_msrpm + (p * 4);
Joerg Roedel323c3d82010-03-01 15:34:37 +01002449
2450 if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4))
2451 return false;
2452
2453 svm->nested.msrpm[p] = svm->msrpm[p] | value;
2454 }
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002455
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002456 svm->vmcb->control.msrpm_base_pa = __pa(svm->nested.msrpm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002457
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002458 return true;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002459}
2460
Joerg Roedel52c65a302010-08-02 16:46:44 +02002461static bool nested_vmcb_checks(struct vmcb *vmcb)
2462{
2463 if ((vmcb->control.intercept & (1ULL << INTERCEPT_VMRUN)) == 0)
2464 return false;
2465
Joerg Roedeldbe77582010-08-02 16:46:45 +02002466 if (vmcb->control.asid == 0)
2467 return false;
2468
Joerg Roedel4b161842010-09-10 17:31:03 +02002469 if (vmcb->control.nested_ctl && !npt_enabled)
2470 return false;
2471
Joerg Roedel52c65a302010-08-02 16:46:44 +02002472 return true;
2473}
2474
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002475static bool nested_svm_vmrun(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002476{
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002477 struct vmcb *nested_vmcb;
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02002478 struct vmcb *hsave = svm->nested.hsave;
Joerg Roedeldefbba52009-08-07 11:49:30 +02002479 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002480 struct page *page;
Joerg Roedel06fc77722010-02-19 16:23:07 +01002481 u64 vmcb_gpa;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002482
Joerg Roedel06fc77722010-02-19 16:23:07 +01002483 vmcb_gpa = svm->vmcb->save.rax;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002484
Joerg Roedel7597f122010-02-19 16:23:00 +01002485 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002486 if (!nested_vmcb)
2487 return false;
2488
Joerg Roedel52c65a302010-08-02 16:46:44 +02002489 if (!nested_vmcb_checks(nested_vmcb)) {
2490 nested_vmcb->control.exit_code = SVM_EXIT_ERR;
2491 nested_vmcb->control.exit_code_hi = 0;
2492 nested_vmcb->control.exit_info_1 = 0;
2493 nested_vmcb->control.exit_info_2 = 0;
2494
2495 nested_svm_unmap(page);
2496
2497 return false;
2498 }
2499
Roedel, Joergb75f4eb2010-09-03 14:21:40 +02002500 trace_kvm_nested_vmrun(svm->vmcb->save.rip, vmcb_gpa,
Joerg Roedel0ac406d2009-10-09 16:08:27 +02002501 nested_vmcb->save.rip,
2502 nested_vmcb->control.int_ctl,
2503 nested_vmcb->control.event_inj,
2504 nested_vmcb->control.nested_ctl);
2505
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002506 trace_kvm_nested_intercepts(nested_vmcb->control.intercept_cr & 0xffff,
2507 nested_vmcb->control.intercept_cr >> 16,
Joerg Roedel2e554e82010-02-24 18:59:14 +01002508 nested_vmcb->control.intercept_exceptions,
2509 nested_vmcb->control.intercept);
2510
Alexander Graf3d6368e2008-11-25 20:17:07 +01002511 /* Clear internal status */
Alexander Graf219b65d2009-06-15 15:21:25 +02002512 kvm_clear_exception_queue(&svm->vcpu);
2513 kvm_clear_interrupt_queue(&svm->vcpu);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002514
Joerg Roedele0231712010-02-24 18:59:10 +01002515 /*
2516 * Save the old vmcb, so we don't need to pick what we save, but can
2517 * restore everything when a VMEXIT occurs
2518 */
Joerg Roedeldefbba52009-08-07 11:49:30 +02002519 hsave->save.es = vmcb->save.es;
2520 hsave->save.cs = vmcb->save.cs;
2521 hsave->save.ss = vmcb->save.ss;
2522 hsave->save.ds = vmcb->save.ds;
2523 hsave->save.gdtr = vmcb->save.gdtr;
2524 hsave->save.idtr = vmcb->save.idtr;
Avi Kivityf6801df2010-01-21 15:31:50 +02002525 hsave->save.efer = svm->vcpu.arch.efer;
Avi Kivity4d4ec082009-12-29 18:07:30 +02002526 hsave->save.cr0 = kvm_read_cr0(&svm->vcpu);
Joerg Roedeldefbba52009-08-07 11:49:30 +02002527 hsave->save.cr4 = svm->vcpu.arch.cr4;
Avi Kivityf6e78472010-08-02 15:30:20 +03002528 hsave->save.rflags = kvm_get_rflags(&svm->vcpu);
Roedel, Joergb75f4eb2010-09-03 14:21:40 +02002529 hsave->save.rip = kvm_rip_read(&svm->vcpu);
Joerg Roedeldefbba52009-08-07 11:49:30 +02002530 hsave->save.rsp = vmcb->save.rsp;
2531 hsave->save.rax = vmcb->save.rax;
2532 if (npt_enabled)
2533 hsave->save.cr3 = vmcb->save.cr3;
2534 else
Avi Kivity9f8fe502010-12-05 17:30:00 +02002535 hsave->save.cr3 = kvm_read_cr3(&svm->vcpu);
Joerg Roedeldefbba52009-08-07 11:49:30 +02002536
Joerg Roedel0460a972009-08-07 11:49:31 +02002537 copy_vmcb_control_area(hsave, vmcb);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002538
Avi Kivityf6e78472010-08-02 15:30:20 +03002539 if (kvm_get_rflags(&svm->vcpu) & X86_EFLAGS_IF)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002540 svm->vcpu.arch.hflags |= HF_HIF_MASK;
2541 else
2542 svm->vcpu.arch.hflags &= ~HF_HIF_MASK;
2543
Joerg Roedel4b161842010-09-10 17:31:03 +02002544 if (nested_vmcb->control.nested_ctl) {
2545 kvm_mmu_unload(&svm->vcpu);
2546 svm->nested.nested_cr3 = nested_vmcb->control.nested_cr3;
2547 nested_svm_init_mmu_context(&svm->vcpu);
2548 }
2549
Alexander Graf3d6368e2008-11-25 20:17:07 +01002550 /* Load the nested guest state */
2551 svm->vmcb->save.es = nested_vmcb->save.es;
2552 svm->vmcb->save.cs = nested_vmcb->save.cs;
2553 svm->vmcb->save.ss = nested_vmcb->save.ss;
2554 svm->vmcb->save.ds = nested_vmcb->save.ds;
2555 svm->vmcb->save.gdtr = nested_vmcb->save.gdtr;
2556 svm->vmcb->save.idtr = nested_vmcb->save.idtr;
Avi Kivityf6e78472010-08-02 15:30:20 +03002557 kvm_set_rflags(&svm->vcpu, nested_vmcb->save.rflags);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002558 svm_set_efer(&svm->vcpu, nested_vmcb->save.efer);
2559 svm_set_cr0(&svm->vcpu, nested_vmcb->save.cr0);
2560 svm_set_cr4(&svm->vcpu, nested_vmcb->save.cr4);
2561 if (npt_enabled) {
2562 svm->vmcb->save.cr3 = nested_vmcb->save.cr3;
2563 svm->vcpu.arch.cr3 = nested_vmcb->save.cr3;
Joerg Roedel0e5cbe32010-02-24 18:59:11 +01002564 } else
Avi Kivity23902182010-06-10 17:02:16 +03002565 (void)kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3);
Joerg Roedel0e5cbe32010-02-24 18:59:11 +01002566
2567 /* Guest paging mode is active - reset mmu */
2568 kvm_mmu_reset_context(&svm->vcpu);
2569
Joerg Roedeldefbba52009-08-07 11:49:30 +02002570 svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002571 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax);
2572 kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp);
2573 kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip);
Joerg Roedele0231712010-02-24 18:59:10 +01002574
Alexander Graf3d6368e2008-11-25 20:17:07 +01002575 /* In case we don't even reach vcpu_run, the fields are not updated */
2576 svm->vmcb->save.rax = nested_vmcb->save.rax;
2577 svm->vmcb->save.rsp = nested_vmcb->save.rsp;
2578 svm->vmcb->save.rip = nested_vmcb->save.rip;
2579 svm->vmcb->save.dr7 = nested_vmcb->save.dr7;
2580 svm->vmcb->save.dr6 = nested_vmcb->save.dr6;
2581 svm->vmcb->save.cpl = nested_vmcb->save.cpl;
2582
Joerg Roedelf7138532010-03-01 15:34:40 +01002583 svm->nested.vmcb_msrpm = nested_vmcb->control.msrpm_base_pa & ~0x0fffULL;
Joerg Roedelce2ac082010-03-01 15:34:39 +01002584 svm->nested.vmcb_iopm = nested_vmcb->control.iopm_base_pa & ~0x0fffULL;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002585
Joerg Roedelaad42c62009-08-07 11:49:34 +02002586 /* cache intercepts */
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002587 svm->nested.intercept_cr = nested_vmcb->control.intercept_cr;
Joerg Roedel3aed0412010-11-30 18:03:58 +01002588 svm->nested.intercept_dr = nested_vmcb->control.intercept_dr;
Joerg Roedelaad42c62009-08-07 11:49:34 +02002589 svm->nested.intercept_exceptions = nested_vmcb->control.intercept_exceptions;
2590 svm->nested.intercept = nested_vmcb->control.intercept;
2591
Joerg Roedelf40f6a42010-12-03 15:25:15 +01002592 svm_flush_tlb(&svm->vcpu);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002593 svm->vmcb->control.int_ctl = nested_vmcb->control.int_ctl | V_INTR_MASKING_MASK;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002594 if (nested_vmcb->control.int_ctl & V_INTR_MASKING_MASK)
2595 svm->vcpu.arch.hflags |= HF_VINTR_MASK;
2596 else
2597 svm->vcpu.arch.hflags &= ~HF_VINTR_MASK;
2598
Joerg Roedel88ab24a2010-02-19 16:23:06 +01002599 if (svm->vcpu.arch.hflags & HF_VINTR_MASK) {
2600 /* We only want the cr8 intercept bits of the guest */
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01002601 clr_cr_intercept(svm, INTERCEPT_CR8_READ);
2602 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Joerg Roedel88ab24a2010-02-19 16:23:06 +01002603 }
2604
Joerg Roedel0d945bd2010-05-05 16:04:45 +02002605 /* We don't want to see VMMCALLs from a nested guest */
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01002606 clr_intercept(svm, INTERCEPT_VMMCALL);
Joerg Roedel0d945bd2010-05-05 16:04:45 +02002607
Joerg Roedel88ab24a2010-02-19 16:23:06 +01002608 svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002609 svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
2610 svm->vmcb->control.int_state = nested_vmcb->control.int_state;
2611 svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002612 svm->vmcb->control.event_inj = nested_vmcb->control.event_inj;
2613 svm->vmcb->control.event_inj_err = nested_vmcb->control.event_inj_err;
2614
Joerg Roedel7597f122010-02-19 16:23:00 +01002615 nested_svm_unmap(page);
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002616
Joerg Roedel20307532010-11-29 17:51:48 +01002617 /* Enter Guest-Mode */
2618 enter_guest_mode(&svm->vcpu);
2619
Joerg Roedel384c6362010-11-30 18:03:56 +01002620 /*
2621 * Merge guest and host intercepts - must be called with vcpu in
2622 * guest-mode to take affect here
2623 */
2624 recalc_intercepts(svm);
2625
Joerg Roedel06fc77722010-02-19 16:23:07 +01002626 svm->nested.vmcb = vmcb_gpa;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002627
Joerg Roedel2af91942009-08-07 11:49:28 +02002628 enable_gif(svm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002629
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01002630 mark_all_dirty(svm->vmcb);
2631
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002632 return true;
Alexander Graf3d6368e2008-11-25 20:17:07 +01002633}
2634
Joerg Roedel9966bf62009-08-07 11:49:40 +02002635static void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
Alexander Graf55426752008-11-25 20:17:06 +01002636{
2637 to_vmcb->save.fs = from_vmcb->save.fs;
2638 to_vmcb->save.gs = from_vmcb->save.gs;
2639 to_vmcb->save.tr = from_vmcb->save.tr;
2640 to_vmcb->save.ldtr = from_vmcb->save.ldtr;
2641 to_vmcb->save.kernel_gs_base = from_vmcb->save.kernel_gs_base;
2642 to_vmcb->save.star = from_vmcb->save.star;
2643 to_vmcb->save.lstar = from_vmcb->save.lstar;
2644 to_vmcb->save.cstar = from_vmcb->save.cstar;
2645 to_vmcb->save.sfmask = from_vmcb->save.sfmask;
2646 to_vmcb->save.sysenter_cs = from_vmcb->save.sysenter_cs;
2647 to_vmcb->save.sysenter_esp = from_vmcb->save.sysenter_esp;
2648 to_vmcb->save.sysenter_eip = from_vmcb->save.sysenter_eip;
Alexander Graf55426752008-11-25 20:17:06 +01002649}
2650
Avi Kivity851ba692009-08-24 11:10:17 +03002651static int vmload_interception(struct vcpu_svm *svm)
Alexander Graf55426752008-11-25 20:17:06 +01002652{
Joerg Roedel9966bf62009-08-07 11:49:40 +02002653 struct vmcb *nested_vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002654 struct page *page;
Joerg Roedel9966bf62009-08-07 11:49:40 +02002655
Alexander Graf55426752008-11-25 20:17:06 +01002656 if (nested_svm_check_permissions(svm))
2657 return 1;
2658
Joerg Roedel7597f122010-02-19 16:23:00 +01002659 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
Joerg Roedel9966bf62009-08-07 11:49:40 +02002660 if (!nested_vmcb)
2661 return 1;
2662
Joerg Roedele3e9ed32011-04-06 12:30:03 +02002663 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2664 skip_emulated_instruction(&svm->vcpu);
2665
Joerg Roedel9966bf62009-08-07 11:49:40 +02002666 nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
Joerg Roedel7597f122010-02-19 16:23:00 +01002667 nested_svm_unmap(page);
Alexander Graf55426752008-11-25 20:17:06 +01002668
2669 return 1;
2670}
2671
Avi Kivity851ba692009-08-24 11:10:17 +03002672static int vmsave_interception(struct vcpu_svm *svm)
Alexander Graf55426752008-11-25 20:17:06 +01002673{
Joerg Roedel9966bf62009-08-07 11:49:40 +02002674 struct vmcb *nested_vmcb;
Joerg Roedel7597f122010-02-19 16:23:00 +01002675 struct page *page;
Joerg Roedel9966bf62009-08-07 11:49:40 +02002676
Alexander Graf55426752008-11-25 20:17:06 +01002677 if (nested_svm_check_permissions(svm))
2678 return 1;
2679
Joerg Roedel7597f122010-02-19 16:23:00 +01002680 nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page);
Joerg Roedel9966bf62009-08-07 11:49:40 +02002681 if (!nested_vmcb)
2682 return 1;
2683
Joerg Roedele3e9ed32011-04-06 12:30:03 +02002684 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2685 skip_emulated_instruction(&svm->vcpu);
2686
Joerg Roedel9966bf62009-08-07 11:49:40 +02002687 nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
Joerg Roedel7597f122010-02-19 16:23:00 +01002688 nested_svm_unmap(page);
Alexander Graf55426752008-11-25 20:17:06 +01002689
2690 return 1;
2691}
2692
Avi Kivity851ba692009-08-24 11:10:17 +03002693static int vmrun_interception(struct vcpu_svm *svm)
Alexander Graf3d6368e2008-11-25 20:17:07 +01002694{
Alexander Graf3d6368e2008-11-25 20:17:07 +01002695 if (nested_svm_check_permissions(svm))
2696 return 1;
2697
Roedel, Joergb75f4eb2010-09-03 14:21:40 +02002698 /* Save rip after vmrun instruction */
2699 kvm_rip_write(&svm->vcpu, kvm_rip_read(&svm->vcpu) + 3);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002700
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002701 if (!nested_svm_vmrun(svm))
Alexander Graf3d6368e2008-11-25 20:17:07 +01002702 return 1;
2703
Joerg Roedel9738b2c2009-08-07 11:49:41 +02002704 if (!nested_svm_vmrun_msrpm(svm))
Joerg Roedel1f8da472009-08-07 11:49:43 +02002705 goto failed;
2706
2707 return 1;
2708
2709failed:
2710
2711 svm->vmcb->control.exit_code = SVM_EXIT_ERR;
2712 svm->vmcb->control.exit_code_hi = 0;
2713 svm->vmcb->control.exit_info_1 = 0;
2714 svm->vmcb->control.exit_info_2 = 0;
2715
2716 nested_svm_vmexit(svm);
Alexander Graf3d6368e2008-11-25 20:17:07 +01002717
2718 return 1;
2719}
2720
Avi Kivity851ba692009-08-24 11:10:17 +03002721static int stgi_interception(struct vcpu_svm *svm)
Alexander Graf1371d902008-11-25 20:17:04 +01002722{
2723 if (nested_svm_check_permissions(svm))
2724 return 1;
2725
2726 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2727 skip_emulated_instruction(&svm->vcpu);
Avi Kivity3842d132010-07-27 12:30:24 +03002728 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
Alexander Graf1371d902008-11-25 20:17:04 +01002729
Joerg Roedel2af91942009-08-07 11:49:28 +02002730 enable_gif(svm);
Alexander Graf1371d902008-11-25 20:17:04 +01002731
2732 return 1;
2733}
2734
Avi Kivity851ba692009-08-24 11:10:17 +03002735static int clgi_interception(struct vcpu_svm *svm)
Alexander Graf1371d902008-11-25 20:17:04 +01002736{
2737 if (nested_svm_check_permissions(svm))
2738 return 1;
2739
2740 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2741 skip_emulated_instruction(&svm->vcpu);
2742
Joerg Roedel2af91942009-08-07 11:49:28 +02002743 disable_gif(svm);
Alexander Graf1371d902008-11-25 20:17:04 +01002744
2745 /* After a CLGI no interrupts should come */
2746 svm_clear_vintr(svm);
2747 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
2748
Joerg Roedeldecdbf62010-12-03 11:45:52 +01002749 mark_dirty(svm->vmcb, VMCB_INTR);
2750
Alexander Graf1371d902008-11-25 20:17:04 +01002751 return 1;
2752}
2753
Avi Kivity851ba692009-08-24 11:10:17 +03002754static int invlpga_interception(struct vcpu_svm *svm)
Alexander Grafff092382009-06-15 15:21:24 +02002755{
2756 struct kvm_vcpu *vcpu = &svm->vcpu;
Alexander Grafff092382009-06-15 15:21:24 +02002757
David Kaplan668f1982015-02-20 16:02:10 -06002758 trace_kvm_invlpga(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RCX),
2759 kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
Joerg Roedelec1ff792009-10-09 16:08:31 +02002760
Alexander Grafff092382009-06-15 15:21:24 +02002761 /* Let's treat INVLPGA the same as INVLPG (can be optimized!) */
David Kaplan668f1982015-02-20 16:02:10 -06002762 kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
Alexander Grafff092382009-06-15 15:21:24 +02002763
2764 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2765 skip_emulated_instruction(&svm->vcpu);
2766 return 1;
2767}
2768
Joerg Roedel532a46b2009-10-09 16:08:32 +02002769static int skinit_interception(struct vcpu_svm *svm)
2770{
David Kaplan668f1982015-02-20 16:02:10 -06002771 trace_kvm_skinit(svm->vmcb->save.rip, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
Joerg Roedel532a46b2009-10-09 16:08:32 +02002772
2773 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2774 return 1;
2775}
2776
David Kaplandab429a2015-03-02 13:43:37 -06002777static int wbinvd_interception(struct vcpu_svm *svm)
2778{
2779 kvm_emulate_wbinvd(&svm->vcpu);
2780 return 1;
2781}
2782
Joerg Roedel81dd35d2010-12-07 17:15:06 +01002783static int xsetbv_interception(struct vcpu_svm *svm)
2784{
2785 u64 new_bv = kvm_read_edx_eax(&svm->vcpu);
2786 u32 index = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
2787
2788 if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
2789 svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
2790 skip_emulated_instruction(&svm->vcpu);
2791 }
2792
2793 return 1;
2794}
2795
Avi Kivity851ba692009-08-24 11:10:17 +03002796static int task_switch_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002797{
Izik Eidus37817f22008-03-24 23:14:53 +02002798 u16 tss_selector;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002799 int reason;
2800 int int_type = svm->vmcb->control.exit_int_info &
2801 SVM_EXITINTINFO_TYPE_MASK;
Gleb Natapov8317c292009-04-12 13:37:02 +03002802 int int_vec = svm->vmcb->control.exit_int_info & SVM_EVTINJ_VEC_MASK;
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002803 uint32_t type =
2804 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_TYPE_MASK;
2805 uint32_t idt_v =
2806 svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID;
Jan Kiszkae269fb22010-04-14 15:51:09 +02002807 bool has_error_code = false;
2808 u32 error_code = 0;
Izik Eidus37817f22008-03-24 23:14:53 +02002809
2810 tss_selector = (u16)svm->vmcb->control.exit_info_1;
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002811
Izik Eidus37817f22008-03-24 23:14:53 +02002812 if (svm->vmcb->control.exit_info_2 &
2813 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_IRET))
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002814 reason = TASK_SWITCH_IRET;
2815 else if (svm->vmcb->control.exit_info_2 &
2816 (1ULL << SVM_EXITINFOSHIFT_TS_REASON_JMP))
2817 reason = TASK_SWITCH_JMP;
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002818 else if (idt_v)
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002819 reason = TASK_SWITCH_GATE;
2820 else
2821 reason = TASK_SWITCH_CALL;
2822
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002823 if (reason == TASK_SWITCH_GATE) {
2824 switch (type) {
2825 case SVM_EXITINTINFO_TYPE_NMI:
2826 svm->vcpu.arch.nmi_injected = false;
2827 break;
2828 case SVM_EXITINTINFO_TYPE_EXEPT:
Jan Kiszkae269fb22010-04-14 15:51:09 +02002829 if (svm->vmcb->control.exit_info_2 &
2830 (1ULL << SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE)) {
2831 has_error_code = true;
2832 error_code =
2833 (u32)svm->vmcb->control.exit_info_2;
2834 }
Gleb Natapovfe8e7f82009-04-23 17:03:48 +03002835 kvm_clear_exception_queue(&svm->vcpu);
2836 break;
2837 case SVM_EXITINTINFO_TYPE_INTR:
2838 kvm_clear_interrupt_queue(&svm->vcpu);
2839 break;
2840 default:
2841 break;
2842 }
2843 }
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002844
Gleb Natapov8317c292009-04-12 13:37:02 +03002845 if (reason != TASK_SWITCH_GATE ||
2846 int_type == SVM_EXITINTINFO_TYPE_SOFT ||
2847 (int_type == SVM_EXITINTINFO_TYPE_EXEPT &&
Gleb Natapovf629cf82009-05-11 13:35:49 +03002848 (int_vec == OF_VECTOR || int_vec == BP_VECTOR)))
2849 skip_emulated_instruction(&svm->vcpu);
Gleb Natapov64a7ec02009-03-30 16:03:29 +03002850
Kevin Wolf7f3d35f2012-02-08 14:34:38 +01002851 if (int_type != SVM_EXITINTINFO_TYPE_SOFT)
2852 int_vec = -1;
2853
2854 if (kvm_task_switch(&svm->vcpu, tss_selector, int_vec, reason,
Gleb Natapovacb54512010-04-15 21:03:50 +03002855 has_error_code, error_code) == EMULATE_FAIL) {
2856 svm->vcpu.run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
2857 svm->vcpu.run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
2858 svm->vcpu.run->internal.ndata = 0;
2859 return 0;
2860 }
2861 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002862}
2863
Avi Kivity851ba692009-08-24 11:10:17 +03002864static int cpuid_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002865{
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03002866 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10002867 kvm_emulate_cpuid(&svm->vcpu);
Avi Kivity06465c52007-02-28 20:46:53 +02002868 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002869}
2870
Avi Kivity851ba692009-08-24 11:10:17 +03002871static int iret_interception(struct vcpu_svm *svm)
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002872{
2873 ++svm->vcpu.stat.nmi_window_exits;
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01002874 clr_intercept(svm, INTERCEPT_IRET);
Gleb Natapov44c11432009-05-11 13:35:52 +03002875 svm->vcpu.arch.hflags |= HF_IRET_MASK;
Avi Kivitybd3d1ec2011-02-03 15:29:52 +02002876 svm->nmi_iret_rip = kvm_rip_read(&svm->vcpu);
Radim Krčmářf303b4c2014-01-17 20:52:42 +01002877 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03002878 return 1;
2879}
2880
Avi Kivity851ba692009-08-24 11:10:17 +03002881static int invlpg_interception(struct vcpu_svm *svm)
Marcelo Tosattia7052892008-09-23 13:18:35 -03002882{
Andre Przywaradf4f31082010-12-21 11:12:06 +01002883 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
2884 return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
2885
2886 kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
2887 skip_emulated_instruction(&svm->vcpu);
2888 return 1;
Marcelo Tosattia7052892008-09-23 13:18:35 -03002889}
2890
Avi Kivity851ba692009-08-24 11:10:17 +03002891static int emulate_on_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08002892{
Andre Przywara51d8b662010-12-21 11:12:02 +01002893 return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
Avi Kivity6aa8b732006-12-10 02:21:36 -08002894}
2895
Avi Kivity332b56e2011-11-10 14:57:24 +02002896static int rdpmc_interception(struct vcpu_svm *svm)
2897{
2898 int err;
2899
2900 if (!static_cpu_has(X86_FEATURE_NRIPS))
2901 return emulate_on_interception(svm);
2902
2903 err = kvm_rdpmc(&svm->vcpu);
2904 kvm_complete_insn_gp(&svm->vcpu, err);
2905
2906 return 1;
2907}
2908
Xiubo Li52eb5a62015-03-13 17:39:45 +08002909static bool check_selective_cr0_intercepted(struct vcpu_svm *svm,
2910 unsigned long val)
Joerg Roedel628afd22011-04-04 12:39:36 +02002911{
2912 unsigned long cr0 = svm->vcpu.arch.cr0;
2913 bool ret = false;
2914 u64 intercept;
2915
2916 intercept = svm->nested.intercept;
2917
2918 if (!is_guest_mode(&svm->vcpu) ||
2919 (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0))))
2920 return false;
2921
2922 cr0 &= ~SVM_CR0_SELECTIVE_MASK;
2923 val &= ~SVM_CR0_SELECTIVE_MASK;
2924
2925 if (cr0 ^ val) {
2926 svm->vmcb->control.exit_code = SVM_EXIT_CR0_SEL_WRITE;
2927 ret = (nested_svm_exit_handled(svm) == NESTED_EXIT_DONE);
2928 }
2929
2930 return ret;
2931}
2932
Andre Przywara7ff76d52010-12-21 11:12:04 +01002933#define CR_VALID (1ULL << 63)
2934
2935static int cr_interception(struct vcpu_svm *svm)
2936{
2937 int reg, cr;
2938 unsigned long val;
2939 int err;
2940
2941 if (!static_cpu_has(X86_FEATURE_DECODEASSISTS))
2942 return emulate_on_interception(svm);
2943
2944 if (unlikely((svm->vmcb->control.exit_info_1 & CR_VALID) == 0))
2945 return emulate_on_interception(svm);
2946
2947 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
David Kaplan5e575182015-03-06 14:44:35 -06002948 if (svm->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE)
2949 cr = SVM_EXIT_WRITE_CR0 - SVM_EXIT_READ_CR0;
2950 else
2951 cr = svm->vmcb->control.exit_code - SVM_EXIT_READ_CR0;
Andre Przywara7ff76d52010-12-21 11:12:04 +01002952
2953 err = 0;
2954 if (cr >= 16) { /* mov to cr */
2955 cr -= 16;
2956 val = kvm_register_read(&svm->vcpu, reg);
2957 switch (cr) {
2958 case 0:
Joerg Roedel628afd22011-04-04 12:39:36 +02002959 if (!check_selective_cr0_intercepted(svm, val))
2960 err = kvm_set_cr0(&svm->vcpu, val);
Joerg Roedel977b2d02011-04-18 11:42:52 +02002961 else
2962 return 1;
2963
Andre Przywara7ff76d52010-12-21 11:12:04 +01002964 break;
2965 case 3:
2966 err = kvm_set_cr3(&svm->vcpu, val);
2967 break;
2968 case 4:
2969 err = kvm_set_cr4(&svm->vcpu, val);
2970 break;
2971 case 8:
2972 err = kvm_set_cr8(&svm->vcpu, val);
2973 break;
2974 default:
2975 WARN(1, "unhandled write to CR%d", cr);
2976 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2977 return 1;
2978 }
2979 } else { /* mov from cr */
2980 switch (cr) {
2981 case 0:
2982 val = kvm_read_cr0(&svm->vcpu);
2983 break;
2984 case 2:
2985 val = svm->vcpu.arch.cr2;
2986 break;
2987 case 3:
Avi Kivity9f8fe502010-12-05 17:30:00 +02002988 val = kvm_read_cr3(&svm->vcpu);
Andre Przywara7ff76d52010-12-21 11:12:04 +01002989 break;
2990 case 4:
2991 val = kvm_read_cr4(&svm->vcpu);
2992 break;
2993 case 8:
2994 val = kvm_get_cr8(&svm->vcpu);
2995 break;
2996 default:
2997 WARN(1, "unhandled read from CR%d", cr);
2998 kvm_queue_exception(&svm->vcpu, UD_VECTOR);
2999 return 1;
3000 }
3001 kvm_register_write(&svm->vcpu, reg, val);
3002 }
3003 kvm_complete_insn_gp(&svm->vcpu, err);
3004
3005 return 1;
3006}
3007
Andre Przywaracae37972010-12-21 11:12:05 +01003008static int dr_interception(struct vcpu_svm *svm)
3009{
3010 int reg, dr;
3011 unsigned long val;
Andre Przywaracae37972010-12-21 11:12:05 +01003012
Paolo Bonzinifacb0132014-02-21 10:32:27 +01003013 if (svm->vcpu.guest_debug == 0) {
3014 /*
3015 * No more DR vmexits; force a reload of the debug registers
3016 * and reenter on this instruction. The next vmexit will
3017 * retrieve the full state of the debug registers.
3018 */
3019 clr_dr_intercepts(svm);
3020 svm->vcpu.arch.switch_db_regs |= KVM_DEBUGREG_WONT_EXIT;
3021 return 1;
3022 }
3023
Andre Przywaracae37972010-12-21 11:12:05 +01003024 if (!boot_cpu_has(X86_FEATURE_DECODEASSISTS))
3025 return emulate_on_interception(svm);
3026
3027 reg = svm->vmcb->control.exit_info_1 & SVM_EXITINFO_REG_MASK;
3028 dr = svm->vmcb->control.exit_code - SVM_EXIT_READ_DR0;
3029
3030 if (dr >= 16) { /* mov to DRn */
Nadav Amit16f8a6f2014-10-03 01:10:05 +03003031 if (!kvm_require_dr(&svm->vcpu, dr - 16))
3032 return 1;
Andre Przywaracae37972010-12-21 11:12:05 +01003033 val = kvm_register_read(&svm->vcpu, reg);
3034 kvm_set_dr(&svm->vcpu, dr - 16, val);
3035 } else {
Nadav Amit16f8a6f2014-10-03 01:10:05 +03003036 if (!kvm_require_dr(&svm->vcpu, dr))
3037 return 1;
3038 kvm_get_dr(&svm->vcpu, dr, &val);
3039 kvm_register_write(&svm->vcpu, reg, val);
Andre Przywaracae37972010-12-21 11:12:05 +01003040 }
3041
Joerg Roedel2c46d2a2011-02-09 18:29:39 +01003042 skip_emulated_instruction(&svm->vcpu);
3043
Andre Przywaracae37972010-12-21 11:12:05 +01003044 return 1;
3045}
3046
Avi Kivity851ba692009-08-24 11:10:17 +03003047static int cr8_write_interception(struct vcpu_svm *svm)
Joerg Roedel1d075432007-12-06 21:02:25 +01003048{
Avi Kivity851ba692009-08-24 11:10:17 +03003049 struct kvm_run *kvm_run = svm->vcpu.run;
Andre Przywaraeea1cff2010-12-21 11:12:00 +01003050 int r;
Avi Kivity851ba692009-08-24 11:10:17 +03003051
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003052 u8 cr8_prev = kvm_get_cr8(&svm->vcpu);
3053 /* instruction emulation calls kvm_set_cr8() */
Andre Przywara7ff76d52010-12-21 11:12:04 +01003054 r = cr_interception(svm);
Radim Krčmář596f3142014-03-11 19:11:18 +01003055 if (irqchip_in_kernel(svm->vcpu.kvm))
Andre Przywara7ff76d52010-12-21 11:12:04 +01003056 return r;
Gleb Natapov0a5fff192009-04-21 17:45:06 +03003057 if (cr8_prev <= kvm_get_cr8(&svm->vcpu))
Andre Przywara7ff76d52010-12-21 11:12:04 +01003058 return r;
Joerg Roedel1d075432007-12-06 21:02:25 +01003059 kvm_run->exit_reason = KVM_EXIT_SET_TPR;
3060 return 0;
3061}
3062
Paolo Bonzini48d89b92014-08-26 13:27:46 +02003063static u64 svm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc)
Nadav Har'Eld5c17852011-08-02 15:54:20 +03003064{
3065 struct vmcb *vmcb = get_host_vmcb(to_svm(vcpu));
3066 return vmcb->control.tsc_offset +
Marcelo Tosatti886b4702012-11-27 23:28:58 -02003067 svm_scale_tsc(vcpu, host_tsc);
Nadav Har'Eld5c17852011-08-02 15:54:20 +03003068}
3069
Avi Kivity6aa8b732006-12-10 02:21:36 -08003070static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
3071{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003072 struct vcpu_svm *svm = to_svm(vcpu);
3073
Avi Kivity6aa8b732006-12-10 02:21:36 -08003074 switch (ecx) {
Jaswinder Singh Rajputaf24a4e2009-05-15 18:42:05 +05303075 case MSR_IA32_TSC: {
Nadav Har'El45133ec2011-08-02 15:55:23 +03003076 *data = svm->vmcb->control.tsc_offset +
Joerg Roedelfbc0db72011-03-25 09:44:46 +01003077 svm_scale_tsc(vcpu, native_read_tsc());
3078
Avi Kivity6aa8b732006-12-10 02:21:36 -08003079 break;
3080 }
Brian Gerst8c065852010-07-17 09:03:26 -04003081 case MSR_STAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003082 *data = svm->vmcb->save.star;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003083 break;
Avi Kivity0e859ca2006-12-22 01:05:08 -08003084#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08003085 case MSR_LSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003086 *data = svm->vmcb->save.lstar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003087 break;
3088 case MSR_CSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003089 *data = svm->vmcb->save.cstar;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003090 break;
3091 case MSR_KERNEL_GS_BASE:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003092 *data = svm->vmcb->save.kernel_gs_base;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003093 break;
3094 case MSR_SYSCALL_MASK:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003095 *data = svm->vmcb->save.sfmask;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003096 break;
3097#endif
3098 case MSR_IA32_SYSENTER_CS:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003099 *data = svm->vmcb->save.sysenter_cs;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003100 break;
3101 case MSR_IA32_SYSENTER_EIP:
Andre Przywara017cb992009-05-28 11:56:31 +02003102 *data = svm->sysenter_eip;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003103 break;
3104 case MSR_IA32_SYSENTER_ESP:
Andre Przywara017cb992009-05-28 11:56:31 +02003105 *data = svm->sysenter_esp;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003106 break;
Joerg Roedele0231712010-02-24 18:59:10 +01003107 /*
3108 * Nobody will change the following 5 values in the VMCB so we can
3109 * safely return them on rdmsr. They will always be 0 until LBRV is
3110 * implemented.
3111 */
Joerg Roedela2938c82008-02-13 16:30:28 +01003112 case MSR_IA32_DEBUGCTLMSR:
3113 *data = svm->vmcb->save.dbgctl;
3114 break;
3115 case MSR_IA32_LASTBRANCHFROMIP:
3116 *data = svm->vmcb->save.br_from;
3117 break;
3118 case MSR_IA32_LASTBRANCHTOIP:
3119 *data = svm->vmcb->save.br_to;
3120 break;
3121 case MSR_IA32_LASTINTFROMIP:
3122 *data = svm->vmcb->save.last_excp_from;
3123 break;
3124 case MSR_IA32_LASTINTTOIP:
3125 *data = svm->vmcb->save.last_excp_to;
3126 break;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003127 case MSR_VM_HSAVE_PA:
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02003128 *data = svm->nested.hsave_msr;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003129 break;
Joerg Roedeleb6f3022008-11-25 20:17:09 +01003130 case MSR_VM_CR:
Joerg Roedel4a810182010-02-24 18:59:15 +01003131 *data = svm->nested.vm_cr_msr;
Joerg Roedeleb6f3022008-11-25 20:17:09 +01003132 break;
Alexander Grafc8a73f12009-01-05 16:02:47 +01003133 case MSR_IA32_UCODE_REV:
3134 *data = 0x01000065;
3135 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003136 default:
Avi Kivity3bab1f52006-12-29 16:49:48 -08003137 return kvm_get_msr_common(vcpu, ecx, data);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003138 }
3139 return 0;
3140}
3141
Avi Kivity851ba692009-08-24 11:10:17 +03003142static int rdmsr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003143{
David Kaplan668f1982015-02-20 16:02:10 -06003144 u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003145 u64 data;
3146
Avi Kivity59200272010-01-25 19:47:02 +02003147 if (svm_get_msr(&svm->vcpu, ecx, &data)) {
3148 trace_kvm_msr_read_ex(ecx);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003149 kvm_inject_gp(&svm->vcpu, 0);
Avi Kivity59200272010-01-25 19:47:02 +02003150 } else {
Marcelo Tosatti229456f2009-06-17 09:22:14 -03003151 trace_kvm_msr_read(ecx, data);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003152
David Kaplan668f1982015-02-20 16:02:10 -06003153 kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, data & 0xffffffff);
3154 kvm_register_write(&svm->vcpu, VCPU_REGS_RDX, data >> 32);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003155 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Rusty Russelle756fc62007-07-30 20:07:08 +10003156 skip_emulated_instruction(&svm->vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003157 }
3158 return 1;
3159}
3160
Joerg Roedel4a810182010-02-24 18:59:15 +01003161static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
3162{
3163 struct vcpu_svm *svm = to_svm(vcpu);
3164 int svm_dis, chg_mask;
3165
3166 if (data & ~SVM_VM_CR_VALID_MASK)
3167 return 1;
3168
3169 chg_mask = SVM_VM_CR_VALID_MASK;
3170
3171 if (svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK)
3172 chg_mask &= ~(SVM_VM_CR_SVM_LOCK_MASK | SVM_VM_CR_SVM_DIS_MASK);
3173
3174 svm->nested.vm_cr_msr &= ~chg_mask;
3175 svm->nested.vm_cr_msr |= (data & chg_mask);
3176
3177 svm_dis = svm->nested.vm_cr_msr & SVM_VM_CR_SVM_DIS_MASK;
3178
3179 /* check for svm_disable while efer.svme is set */
3180 if (svm_dis && (vcpu->arch.efer & EFER_SVME))
3181 return 1;
3182
3183 return 0;
3184}
3185
Will Auld8fe8ab42012-11-29 12:42:12 -08003186static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003187{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003188 struct vcpu_svm *svm = to_svm(vcpu);
3189
Will Auld8fe8ab42012-11-29 12:42:12 -08003190 u32 ecx = msr->index;
3191 u64 data = msr->data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003192 switch (ecx) {
Zachary Amsdenf4e1b3c2010-08-19 22:07:16 -10003193 case MSR_IA32_TSC:
Will Auld8fe8ab42012-11-29 12:42:12 -08003194 kvm_write_tsc(vcpu, msr);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003195 break;
Brian Gerst8c065852010-07-17 09:03:26 -04003196 case MSR_STAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003197 svm->vmcb->save.star = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003198 break;
Robert P. J. Day49b14f22007-01-29 13:19:50 -08003199#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -08003200 case MSR_LSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003201 svm->vmcb->save.lstar = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003202 break;
3203 case MSR_CSTAR:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003204 svm->vmcb->save.cstar = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003205 break;
3206 case MSR_KERNEL_GS_BASE:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003207 svm->vmcb->save.kernel_gs_base = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003208 break;
3209 case MSR_SYSCALL_MASK:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003210 svm->vmcb->save.sfmask = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003211 break;
3212#endif
3213 case MSR_IA32_SYSENTER_CS:
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003214 svm->vmcb->save.sysenter_cs = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003215 break;
3216 case MSR_IA32_SYSENTER_EIP:
Andre Przywara017cb992009-05-28 11:56:31 +02003217 svm->sysenter_eip = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003218 svm->vmcb->save.sysenter_eip = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003219 break;
3220 case MSR_IA32_SYSENTER_ESP:
Andre Przywara017cb992009-05-28 11:56:31 +02003221 svm->sysenter_esp = data;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003222 svm->vmcb->save.sysenter_esp = data;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003223 break;
Joerg Roedela2938c82008-02-13 16:30:28 +01003224 case MSR_IA32_DEBUGCTLMSR:
Avi Kivity2a6b20b2010-11-09 16:15:42 +02003225 if (!boot_cpu_has(X86_FEATURE_LBRV)) {
Christoffer Dalla737f252012-06-03 21:17:48 +03003226 vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTL 0x%llx, nop\n",
3227 __func__, data);
Joerg Roedel24e09cb2008-02-13 18:58:47 +01003228 break;
3229 }
3230 if (data & DEBUGCTL_RESERVED_BITS)
3231 return 1;
3232
3233 svm->vmcb->save.dbgctl = data;
Joerg Roedelb53ba3f2010-12-03 11:45:59 +01003234 mark_dirty(svm->vmcb, VMCB_LBR);
Joerg Roedel24e09cb2008-02-13 18:58:47 +01003235 if (data & (1ULL<<0))
3236 svm_enable_lbrv(svm);
3237 else
3238 svm_disable_lbrv(svm);
Joerg Roedela2938c82008-02-13 16:30:28 +01003239 break;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003240 case MSR_VM_HSAVE_PA:
Joerg Roedele6aa9ab2009-08-07 11:49:33 +02003241 svm->nested.hsave_msr = data;
Alexander Grafb286d5d2008-11-25 20:17:05 +01003242 break;
Alexander Graf3c5d0a42009-06-15 15:21:23 +02003243 case MSR_VM_CR:
Joerg Roedel4a810182010-02-24 18:59:15 +01003244 return svm_set_vm_cr(vcpu, data);
Alexander Graf3c5d0a42009-06-15 15:21:23 +02003245 case MSR_VM_IGNNE:
Christoffer Dalla737f252012-06-03 21:17:48 +03003246 vcpu_unimpl(vcpu, "unimplemented wrmsr: 0x%x data 0x%llx\n", ecx, data);
Alexander Graf3c5d0a42009-06-15 15:21:23 +02003247 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003248 default:
Will Auld8fe8ab42012-11-29 12:42:12 -08003249 return kvm_set_msr_common(vcpu, msr);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003250 }
3251 return 0;
3252}
3253
Avi Kivity851ba692009-08-24 11:10:17 +03003254static int wrmsr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003255{
Will Auld8fe8ab42012-11-29 12:42:12 -08003256 struct msr_data msr;
David Kaplan668f1982015-02-20 16:02:10 -06003257 u32 ecx = kvm_register_read(&svm->vcpu, VCPU_REGS_RCX);
3258 u64 data = kvm_read_edx_eax(&svm->vcpu);
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003259
Will Auld8fe8ab42012-11-29 12:42:12 -08003260 msr.data = data;
3261 msr.index = ecx;
3262 msr.host_initiated = false;
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003263
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03003264 svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
Nadav Amit854e8bb2014-09-16 03:24:05 +03003265 if (kvm_set_msr(&svm->vcpu, &msr)) {
Avi Kivity59200272010-01-25 19:47:02 +02003266 trace_kvm_msr_write_ex(ecx, data);
Avi Kivityc1a5d4f2007-11-25 14:12:03 +02003267 kvm_inject_gp(&svm->vcpu, 0);
Avi Kivity59200272010-01-25 19:47:02 +02003268 } else {
3269 trace_kvm_msr_write(ecx, data);
Rusty Russelle756fc62007-07-30 20:07:08 +10003270 skip_emulated_instruction(&svm->vcpu);
Avi Kivity59200272010-01-25 19:47:02 +02003271 }
Avi Kivity6aa8b732006-12-10 02:21:36 -08003272 return 1;
3273}
3274
Avi Kivity851ba692009-08-24 11:10:17 +03003275static int msr_interception(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003276{
Rusty Russelle756fc62007-07-30 20:07:08 +10003277 if (svm->vmcb->control.exit_info_1)
Avi Kivity851ba692009-08-24 11:10:17 +03003278 return wrmsr_interception(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003279 else
Avi Kivity851ba692009-08-24 11:10:17 +03003280 return rdmsr_interception(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003281}
3282
Avi Kivity851ba692009-08-24 11:10:17 +03003283static int interrupt_window_interception(struct vcpu_svm *svm)
Dor Laorc1150d82007-01-05 16:36:24 -08003284{
Avi Kivity851ba692009-08-24 11:10:17 +03003285 struct kvm_run *kvm_run = svm->vcpu.run;
3286
Avi Kivity3842d132010-07-27 12:30:24 +03003287 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
Alexander Graff0b85052008-11-25 20:17:01 +01003288 svm_clear_vintr(svm);
Eddie Dong85f455f2007-07-06 12:20:49 +03003289 svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
Joerg Roedeldecdbf62010-12-03 11:45:52 +01003290 mark_dirty(svm->vmcb, VMCB_INTR);
Jason Wang675acb72012-03-08 18:07:56 +08003291 ++svm->vcpu.stat.irq_window_exits;
Dor Laorc1150d82007-01-05 16:36:24 -08003292 /*
3293 * If the user space waits to inject interrupts, exit as soon as
3294 * possible
3295 */
Gleb Natapov80618232009-04-21 17:44:56 +03003296 if (!irqchip_in_kernel(svm->vcpu.kvm) &&
3297 kvm_run->request_interrupt_window &&
3298 !kvm_cpu_has_interrupt(&svm->vcpu)) {
Dor Laorc1150d82007-01-05 16:36:24 -08003299 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
3300 return 0;
3301 }
3302
3303 return 1;
3304}
3305
Mark Langsdorf565d0992009-10-06 14:25:02 -05003306static int pause_interception(struct vcpu_svm *svm)
3307{
3308 kvm_vcpu_on_spin(&(svm->vcpu));
3309 return 1;
3310}
3311
Gabriel L. Somlo87c00572014-05-07 16:52:13 -04003312static int nop_interception(struct vcpu_svm *svm)
3313{
3314 skip_emulated_instruction(&(svm->vcpu));
3315 return 1;
3316}
3317
3318static int monitor_interception(struct vcpu_svm *svm)
3319{
3320 printk_once(KERN_WARNING "kvm: MONITOR instruction emulated as NOP!\n");
3321 return nop_interception(svm);
3322}
3323
3324static int mwait_interception(struct vcpu_svm *svm)
3325{
3326 printk_once(KERN_WARNING "kvm: MWAIT instruction emulated as NOP!\n");
3327 return nop_interception(svm);
3328}
3329
Mathias Krause09941fb2012-08-30 01:30:20 +02003330static int (*const svm_exit_handlers[])(struct vcpu_svm *svm) = {
Andre Przywara7ff76d52010-12-21 11:12:04 +01003331 [SVM_EXIT_READ_CR0] = cr_interception,
3332 [SVM_EXIT_READ_CR3] = cr_interception,
3333 [SVM_EXIT_READ_CR4] = cr_interception,
3334 [SVM_EXIT_READ_CR8] = cr_interception,
David Kaplan5e575182015-03-06 14:44:35 -06003335 [SVM_EXIT_CR0_SEL_WRITE] = cr_interception,
Joerg Roedel628afd22011-04-04 12:39:36 +02003336 [SVM_EXIT_WRITE_CR0] = cr_interception,
Andre Przywara7ff76d52010-12-21 11:12:04 +01003337 [SVM_EXIT_WRITE_CR3] = cr_interception,
3338 [SVM_EXIT_WRITE_CR4] = cr_interception,
Joerg Roedele0231712010-02-24 18:59:10 +01003339 [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
Andre Przywaracae37972010-12-21 11:12:05 +01003340 [SVM_EXIT_READ_DR0] = dr_interception,
3341 [SVM_EXIT_READ_DR1] = dr_interception,
3342 [SVM_EXIT_READ_DR2] = dr_interception,
3343 [SVM_EXIT_READ_DR3] = dr_interception,
3344 [SVM_EXIT_READ_DR4] = dr_interception,
3345 [SVM_EXIT_READ_DR5] = dr_interception,
3346 [SVM_EXIT_READ_DR6] = dr_interception,
3347 [SVM_EXIT_READ_DR7] = dr_interception,
3348 [SVM_EXIT_WRITE_DR0] = dr_interception,
3349 [SVM_EXIT_WRITE_DR1] = dr_interception,
3350 [SVM_EXIT_WRITE_DR2] = dr_interception,
3351 [SVM_EXIT_WRITE_DR3] = dr_interception,
3352 [SVM_EXIT_WRITE_DR4] = dr_interception,
3353 [SVM_EXIT_WRITE_DR5] = dr_interception,
3354 [SVM_EXIT_WRITE_DR6] = dr_interception,
3355 [SVM_EXIT_WRITE_DR7] = dr_interception,
Jan Kiszkad0bfb942008-12-15 13:52:10 +01003356 [SVM_EXIT_EXCP_BASE + DB_VECTOR] = db_interception,
3357 [SVM_EXIT_EXCP_BASE + BP_VECTOR] = bp_interception,
Anthony Liguori7aa81cc2007-09-17 14:57:50 -05003358 [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
Joerg Roedele0231712010-02-24 18:59:10 +01003359 [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
3360 [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
3361 [SVM_EXIT_EXCP_BASE + MC_VECTOR] = mc_interception,
3362 [SVM_EXIT_INTR] = intr_interception,
Joerg Roedelc47f0982008-04-30 17:56:00 +02003363 [SVM_EXIT_NMI] = nmi_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003364 [SVM_EXIT_SMI] = nop_on_interception,
3365 [SVM_EXIT_INIT] = nop_on_interception,
Dor Laorc1150d82007-01-05 16:36:24 -08003366 [SVM_EXIT_VINTR] = interrupt_window_interception,
Avi Kivity332b56e2011-11-10 14:57:24 +02003367 [SVM_EXIT_RDPMC] = rdpmc_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003368 [SVM_EXIT_CPUID] = cpuid_interception,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003369 [SVM_EXIT_IRET] = iret_interception,
Avi Kivitycf5a94d2007-10-28 16:11:58 +02003370 [SVM_EXIT_INVD] = emulate_on_interception,
Mark Langsdorf565d0992009-10-06 14:25:02 -05003371 [SVM_EXIT_PAUSE] = pause_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003372 [SVM_EXIT_HLT] = halt_interception,
Marcelo Tosattia7052892008-09-23 13:18:35 -03003373 [SVM_EXIT_INVLPG] = invlpg_interception,
Alexander Grafff092382009-06-15 15:21:24 +02003374 [SVM_EXIT_INVLPGA] = invlpga_interception,
Joerg Roedele0231712010-02-24 18:59:10 +01003375 [SVM_EXIT_IOIO] = io_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003376 [SVM_EXIT_MSR] = msr_interception,
3377 [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
Joerg Roedel46fe4dd2007-01-26 00:56:42 -08003378 [SVM_EXIT_SHUTDOWN] = shutdown_interception,
Alexander Graf3d6368e2008-11-25 20:17:07 +01003379 [SVM_EXIT_VMRUN] = vmrun_interception,
Avi Kivity02e235b2007-02-19 14:37:47 +02003380 [SVM_EXIT_VMMCALL] = vmmcall_interception,
Alexander Graf55426752008-11-25 20:17:06 +01003381 [SVM_EXIT_VMLOAD] = vmload_interception,
3382 [SVM_EXIT_VMSAVE] = vmsave_interception,
Alexander Graf1371d902008-11-25 20:17:04 +01003383 [SVM_EXIT_STGI] = stgi_interception,
3384 [SVM_EXIT_CLGI] = clgi_interception,
Joerg Roedel532a46b2009-10-09 16:08:32 +02003385 [SVM_EXIT_SKINIT] = skinit_interception,
David Kaplandab429a2015-03-02 13:43:37 -06003386 [SVM_EXIT_WBINVD] = wbinvd_interception,
Gabriel L. Somlo87c00572014-05-07 16:52:13 -04003387 [SVM_EXIT_MONITOR] = monitor_interception,
3388 [SVM_EXIT_MWAIT] = mwait_interception,
Joerg Roedel81dd35d2010-12-07 17:15:06 +01003389 [SVM_EXIT_XSETBV] = xsetbv_interception,
Joerg Roedel709ddeb2008-02-07 13:47:45 +01003390 [SVM_EXIT_NPF] = pf_interception,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003391};
3392
Joe Perchesae8cc052011-04-24 22:00:50 -07003393static void dump_vmcb(struct kvm_vcpu *vcpu)
Joerg Roedel3f10c842010-05-05 16:04:42 +02003394{
3395 struct vcpu_svm *svm = to_svm(vcpu);
3396 struct vmcb_control_area *control = &svm->vmcb->control;
3397 struct vmcb_save_area *save = &svm->vmcb->save;
3398
3399 pr_err("VMCB Control Area:\n");
Joe Perchesae8cc052011-04-24 22:00:50 -07003400 pr_err("%-20s%04x\n", "cr_read:", control->intercept_cr & 0xffff);
3401 pr_err("%-20s%04x\n", "cr_write:", control->intercept_cr >> 16);
3402 pr_err("%-20s%04x\n", "dr_read:", control->intercept_dr & 0xffff);
3403 pr_err("%-20s%04x\n", "dr_write:", control->intercept_dr >> 16);
3404 pr_err("%-20s%08x\n", "exceptions:", control->intercept_exceptions);
3405 pr_err("%-20s%016llx\n", "intercepts:", control->intercept);
3406 pr_err("%-20s%d\n", "pause filter count:", control->pause_filter_count);
3407 pr_err("%-20s%016llx\n", "iopm_base_pa:", control->iopm_base_pa);
3408 pr_err("%-20s%016llx\n", "msrpm_base_pa:", control->msrpm_base_pa);
3409 pr_err("%-20s%016llx\n", "tsc_offset:", control->tsc_offset);
3410 pr_err("%-20s%d\n", "asid:", control->asid);
3411 pr_err("%-20s%d\n", "tlb_ctl:", control->tlb_ctl);
3412 pr_err("%-20s%08x\n", "int_ctl:", control->int_ctl);
3413 pr_err("%-20s%08x\n", "int_vector:", control->int_vector);
3414 pr_err("%-20s%08x\n", "int_state:", control->int_state);
3415 pr_err("%-20s%08x\n", "exit_code:", control->exit_code);
3416 pr_err("%-20s%016llx\n", "exit_info1:", control->exit_info_1);
3417 pr_err("%-20s%016llx\n", "exit_info2:", control->exit_info_2);
3418 pr_err("%-20s%08x\n", "exit_int_info:", control->exit_int_info);
3419 pr_err("%-20s%08x\n", "exit_int_info_err:", control->exit_int_info_err);
3420 pr_err("%-20s%lld\n", "nested_ctl:", control->nested_ctl);
3421 pr_err("%-20s%016llx\n", "nested_cr3:", control->nested_cr3);
3422 pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
3423 pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
3424 pr_err("%-20s%lld\n", "lbr_ctl:", control->lbr_ctl);
3425 pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
Joerg Roedel3f10c842010-05-05 16:04:42 +02003426 pr_err("VMCB State Save Area:\n");
Joe Perchesae8cc052011-04-24 22:00:50 -07003427 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3428 "es:",
3429 save->es.selector, save->es.attrib,
3430 save->es.limit, save->es.base);
3431 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3432 "cs:",
3433 save->cs.selector, save->cs.attrib,
3434 save->cs.limit, save->cs.base);
3435 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3436 "ss:",
3437 save->ss.selector, save->ss.attrib,
3438 save->ss.limit, save->ss.base);
3439 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3440 "ds:",
3441 save->ds.selector, save->ds.attrib,
3442 save->ds.limit, save->ds.base);
3443 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3444 "fs:",
3445 save->fs.selector, save->fs.attrib,
3446 save->fs.limit, save->fs.base);
3447 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3448 "gs:",
3449 save->gs.selector, save->gs.attrib,
3450 save->gs.limit, save->gs.base);
3451 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3452 "gdtr:",
3453 save->gdtr.selector, save->gdtr.attrib,
3454 save->gdtr.limit, save->gdtr.base);
3455 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3456 "ldtr:",
3457 save->ldtr.selector, save->ldtr.attrib,
3458 save->ldtr.limit, save->ldtr.base);
3459 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3460 "idtr:",
3461 save->idtr.selector, save->idtr.attrib,
3462 save->idtr.limit, save->idtr.base);
3463 pr_err("%-5s s: %04x a: %04x l: %08x b: %016llx\n",
3464 "tr:",
3465 save->tr.selector, save->tr.attrib,
3466 save->tr.limit, save->tr.base);
Joerg Roedel3f10c842010-05-05 16:04:42 +02003467 pr_err("cpl: %d efer: %016llx\n",
3468 save->cpl, save->efer);
Joe Perchesae8cc052011-04-24 22:00:50 -07003469 pr_err("%-15s %016llx %-13s %016llx\n",
3470 "cr0:", save->cr0, "cr2:", save->cr2);
3471 pr_err("%-15s %016llx %-13s %016llx\n",
3472 "cr3:", save->cr3, "cr4:", save->cr4);
3473 pr_err("%-15s %016llx %-13s %016llx\n",
3474 "dr6:", save->dr6, "dr7:", save->dr7);
3475 pr_err("%-15s %016llx %-13s %016llx\n",
3476 "rip:", save->rip, "rflags:", save->rflags);
3477 pr_err("%-15s %016llx %-13s %016llx\n",
3478 "rsp:", save->rsp, "rax:", save->rax);
3479 pr_err("%-15s %016llx %-13s %016llx\n",
3480 "star:", save->star, "lstar:", save->lstar);
3481 pr_err("%-15s %016llx %-13s %016llx\n",
3482 "cstar:", save->cstar, "sfmask:", save->sfmask);
3483 pr_err("%-15s %016llx %-13s %016llx\n",
3484 "kernel_gs_base:", save->kernel_gs_base,
3485 "sysenter_cs:", save->sysenter_cs);
3486 pr_err("%-15s %016llx %-13s %016llx\n",
3487 "sysenter_esp:", save->sysenter_esp,
3488 "sysenter_eip:", save->sysenter_eip);
3489 pr_err("%-15s %016llx %-13s %016llx\n",
3490 "gpat:", save->g_pat, "dbgctl:", save->dbgctl);
3491 pr_err("%-15s %016llx %-13s %016llx\n",
3492 "br_from:", save->br_from, "br_to:", save->br_to);
3493 pr_err("%-15s %016llx %-13s %016llx\n",
3494 "excp_from:", save->last_excp_from,
3495 "excp_to:", save->last_excp_to);
Joerg Roedel3f10c842010-05-05 16:04:42 +02003496}
3497
Avi Kivity586f9602010-11-18 13:09:54 +02003498static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
3499{
3500 struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
3501
3502 *info1 = control->exit_info_1;
3503 *info2 = control->exit_info_2;
3504}
3505
Avi Kivity851ba692009-08-24 11:10:17 +03003506static int handle_exit(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003507{
Avi Kivity04d2cc72007-09-10 18:10:54 +03003508 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivity851ba692009-08-24 11:10:17 +03003509 struct kvm_run *kvm_run = vcpu->run;
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003510 u32 exit_code = svm->vmcb->control.exit_code;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003511
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003512 if (!is_cr_intercept(svm, INTERCEPT_CR0_WRITE))
Joerg Roedel2be4fc72010-04-22 12:33:09 +02003513 vcpu->arch.cr0 = svm->vmcb->save.cr0;
3514 if (npt_enabled)
3515 vcpu->arch.cr3 = svm->vmcb->save.cr3;
Joerg Roedelaf9ca2d2008-04-30 17:56:03 +02003516
Joerg Roedelcd3ff652009-10-09 16:08:26 +02003517 if (unlikely(svm->nested.exit_required)) {
3518 nested_svm_vmexit(svm);
3519 svm->nested.exit_required = false;
3520
3521 return 1;
3522 }
3523
Joerg Roedel20307532010-11-29 17:51:48 +01003524 if (is_guest_mode(vcpu)) {
Joerg Roedel410e4d52009-08-07 11:49:44 +02003525 int vmexit;
3526
Joerg Roedeld8cabdd2009-10-09 16:08:28 +02003527 trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,
3528 svm->vmcb->control.exit_info_1,
3529 svm->vmcb->control.exit_info_2,
3530 svm->vmcb->control.exit_int_info,
Stefan Hajnoczie097e5f2011-07-22 12:46:52 +01003531 svm->vmcb->control.exit_int_info_err,
3532 KVM_ISA_SVM);
Joerg Roedeld8cabdd2009-10-09 16:08:28 +02003533
Joerg Roedel410e4d52009-08-07 11:49:44 +02003534 vmexit = nested_svm_exit_special(svm);
3535
3536 if (vmexit == NESTED_EXIT_CONTINUE)
3537 vmexit = nested_svm_exit_handled(svm);
3538
3539 if (vmexit == NESTED_EXIT_DONE)
Alexander Grafcf74a782008-11-25 20:17:08 +01003540 return 1;
Alexander Grafcf74a782008-11-25 20:17:08 +01003541 }
3542
Joerg Roedela5c38322009-08-07 11:49:32 +02003543 svm_complete_interrupts(svm);
3544
Avi Kivity04d2cc72007-09-10 18:10:54 +03003545 if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
3546 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
3547 kvm_run->fail_entry.hardware_entry_failure_reason
3548 = svm->vmcb->control.exit_code;
Joerg Roedel3f10c842010-05-05 16:04:42 +02003549 pr_err("KVM: FAILED VMRUN WITH VMCB:\n");
3550 dump_vmcb(vcpu);
Avi Kivity04d2cc72007-09-10 18:10:54 +03003551 return 0;
3552 }
3553
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003554 if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
Joerg Roedel709ddeb2008-02-07 13:47:45 +01003555 exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR &&
Joerg Roedel55c5e462010-09-10 17:31:04 +02003556 exit_code != SVM_EXIT_NPF && exit_code != SVM_EXIT_TASK_SWITCH &&
3557 exit_code != SVM_EXIT_INTR && exit_code != SVM_EXIT_NMI)
Borislav Petkov6614c7d2013-04-26 00:22:01 +02003558 printk(KERN_ERR "%s: unexpected exit_int_info 0x%x "
Avi Kivity6aa8b732006-12-10 02:21:36 -08003559 "exit_code 0x%x\n",
Harvey Harrisonb8688d52008-03-03 12:59:56 -08003560 __func__, svm->vmcb->control.exit_int_info,
Avi Kivity6aa8b732006-12-10 02:21:36 -08003561 exit_code);
3562
Ahmed S. Darwish9d8f5492007-02-19 14:37:46 +02003563 if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
Joe Perches56919c52007-11-12 20:06:51 -08003564 || !svm_exit_handlers[exit_code]) {
Bandan Dasfaac2452015-03-16 17:18:25 -04003565 WARN_ONCE(1, "svm: unexpected exit reason 0x%x\n", exit_code);
Michael S. Tsirkin2bc19dc2014-09-18 16:21:16 +03003566 kvm_queue_exception(vcpu, UD_VECTOR);
3567 return 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003568 }
3569
Avi Kivity851ba692009-08-24 11:10:17 +03003570 return svm_exit_handlers[exit_code](svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003571}
3572
3573static void reload_tss(struct kvm_vcpu *vcpu)
3574{
3575 int cpu = raw_smp_processor_id();
3576
Tejun Heo0fe1e002009-10-29 22:34:14 +09003577 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
3578 sd->tss_desc->type = 9; /* available 32/64-bit TSS */
Avi Kivity6aa8b732006-12-10 02:21:36 -08003579 load_TR_desc();
3580}
3581
Rusty Russelle756fc62007-07-30 20:07:08 +10003582static void pre_svm_run(struct vcpu_svm *svm)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003583{
3584 int cpu = raw_smp_processor_id();
3585
Tejun Heo0fe1e002009-10-29 22:34:14 +09003586 struct svm_cpu_data *sd = per_cpu(svm_data, cpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003587
Marcelo Tosatti4b656b12009-07-21 12:47:45 -03003588 /* FIXME: handle wraparound of asid_generation */
Tejun Heo0fe1e002009-10-29 22:34:14 +09003589 if (svm->asid_generation != sd->asid_generation)
3590 new_asid(svm, sd);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003591}
3592
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003593static void svm_inject_nmi(struct kvm_vcpu *vcpu)
3594{
3595 struct vcpu_svm *svm = to_svm(vcpu);
3596
3597 svm->vmcb->control.event_inj = SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_NMI;
3598 vcpu->arch.hflags |= HF_NMI_MASK;
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01003599 set_intercept(svm, INTERCEPT_IRET);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003600 ++vcpu->stat.nmi_injections;
3601}
Avi Kivity6aa8b732006-12-10 02:21:36 -08003602
Eddie Dong85f455f2007-07-06 12:20:49 +03003603static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003604{
3605 struct vmcb_control_area *control;
3606
Rusty Russelle756fc62007-07-30 20:07:08 +10003607 control = &svm->vmcb->control;
Eddie Dong85f455f2007-07-06 12:20:49 +03003608 control->int_vector = irq;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003609 control->int_ctl &= ~V_INTR_PRIO_MASK;
3610 control->int_ctl |= V_IRQ_MASK |
3611 ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
Joerg Roedeldecdbf62010-12-03 11:45:52 +01003612 mark_dirty(svm->vmcb, VMCB_INTR);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003613}
3614
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003615static void svm_set_irq(struct kvm_vcpu *vcpu)
Eddie Dong2a8067f2007-08-06 16:29:07 +03003616{
3617 struct vcpu_svm *svm = to_svm(vcpu);
3618
Joerg Roedel2af91942009-08-07 11:49:28 +02003619 BUG_ON(!(gif_set(svm)));
Alexander Grafcf74a782008-11-25 20:17:08 +01003620
Gleb Natapov9fb2d2b2010-05-23 14:28:26 +03003621 trace_kvm_inj_virq(vcpu->arch.interrupt.nr);
3622 ++vcpu->stat.irq_injections;
3623
Alexander Graf219b65d2009-06-15 15:21:25 +02003624 svm->vmcb->control.event_inj = vcpu->arch.interrupt.nr |
3625 SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR;
Eddie Dong2a8067f2007-08-06 16:29:07 +03003626}
3627
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003628static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
3629{
3630 struct vcpu_svm *svm = to_svm(vcpu);
3631
Joerg Roedel20307532010-11-29 17:51:48 +01003632 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
Joerg Roedel88ab24a2010-02-19 16:23:06 +01003633 return;
3634
Radim Krčmář596f3142014-03-11 19:11:18 +01003635 clr_cr_intercept(svm, INTERCEPT_CR8_WRITE);
3636
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003637 if (irr == -1)
3638 return;
3639
3640 if (tpr >= irr)
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003641 set_cr_intercept(svm, INTERCEPT_CR8_WRITE);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003642}
3643
Yang Zhang8d146952013-01-25 10:18:50 +08003644static void svm_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
3645{
3646 return;
3647}
3648
Yang Zhangc7c9c562013-01-25 10:18:51 +08003649static int svm_vm_has_apicv(struct kvm *kvm)
3650{
3651 return 0;
3652}
3653
3654static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
3655{
3656 return;
3657}
3658
Yang Zhanga20ed542013-04-11 19:25:15 +08003659static void svm_sync_pir_to_irr(struct kvm_vcpu *vcpu)
3660{
3661 return;
3662}
3663
Gleb Natapov95ba8273132009-04-21 17:45:08 +03003664static int svm_nmi_allowed(struct kvm_vcpu *vcpu)
Joerg Roedelaaacfc92008-04-16 16:51:18 +02003665{
3666 struct vcpu_svm *svm = to_svm(vcpu);
3667 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel924584c2010-04-22 12:33:07 +02003668 int ret;
3669 ret = !(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
3670 !(svm->vcpu.arch.hflags & HF_NMI_MASK);
3671 ret = ret && gif_set(svm) && nested_svm_nmi(svm);
3672
3673 return ret;
Joerg Roedelaaacfc92008-04-16 16:51:18 +02003674}
3675
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003676static bool svm_get_nmi_mask(struct kvm_vcpu *vcpu)
3677{
3678 struct vcpu_svm *svm = to_svm(vcpu);
3679
3680 return !!(svm->vcpu.arch.hflags & HF_NMI_MASK);
3681}
3682
3683static void svm_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
3684{
3685 struct vcpu_svm *svm = to_svm(vcpu);
3686
3687 if (masked) {
3688 svm->vcpu.arch.hflags |= HF_NMI_MASK;
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01003689 set_intercept(svm, INTERCEPT_IRET);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003690 } else {
3691 svm->vcpu.arch.hflags &= ~HF_NMI_MASK;
Joerg Roedel8a05a1b2010-11-30 18:04:00 +01003692 clr_intercept(svm, INTERCEPT_IRET);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01003693 }
3694}
3695
Gleb Natapov78646122009-03-23 12:12:11 +02003696static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
3697{
3698 struct vcpu_svm *svm = to_svm(vcpu);
3699 struct vmcb *vmcb = svm->vmcb;
Joerg Roedel7fcdb512009-09-16 15:24:15 +02003700 int ret;
3701
3702 if (!gif_set(svm) ||
3703 (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK))
3704 return 0;
3705
Avi Kivityf6e78472010-08-02 15:30:20 +03003706 ret = !!(kvm_get_rflags(vcpu) & X86_EFLAGS_IF);
Joerg Roedel7fcdb512009-09-16 15:24:15 +02003707
Joerg Roedel20307532010-11-29 17:51:48 +01003708 if (is_guest_mode(vcpu))
Joerg Roedel7fcdb512009-09-16 15:24:15 +02003709 return ret && !(svm->vcpu.arch.hflags & HF_VINTR_MASK);
3710
3711 return ret;
Gleb Natapov78646122009-03-23 12:12:11 +02003712}
3713
Jan Kiszkac9a79532014-03-07 20:03:15 +01003714static void enable_irq_window(struct kvm_vcpu *vcpu)
Gleb Natapov9222be12009-04-23 17:14:37 +03003715{
Alexander Graf219b65d2009-06-15 15:21:25 +02003716 struct vcpu_svm *svm = to_svm(vcpu);
Alexander Graf219b65d2009-06-15 15:21:25 +02003717
Joerg Roedele0231712010-02-24 18:59:10 +01003718 /*
3719 * In case GIF=0 we can't rely on the CPU to tell us when GIF becomes
3720 * 1, because that's a separate STGI/VMRUN intercept. The next time we
3721 * get that intercept, this function will be called again though and
3722 * we'll get the vintr intercept.
3723 */
Joerg Roedel8fe54652010-02-19 16:23:01 +01003724 if (gif_set(svm) && nested_svm_intr(svm)) {
Alexander Graf219b65d2009-06-15 15:21:25 +02003725 svm_set_vintr(svm);
3726 svm_inject_irq(svm, 0x0);
3727 }
Gleb Natapov9222be12009-04-23 17:14:37 +03003728}
3729
Jan Kiszkac9a79532014-03-07 20:03:15 +01003730static void enable_nmi_window(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003731{
Avi Kivity04d2cc72007-09-10 18:10:54 +03003732 struct vcpu_svm *svm = to_svm(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03003733
Gleb Natapov44c11432009-05-11 13:35:52 +03003734 if ((svm->vcpu.arch.hflags & (HF_NMI_MASK | HF_IRET_MASK))
3735 == HF_NMI_MASK)
Jan Kiszkac9a79532014-03-07 20:03:15 +01003736 return; /* IRET will cause a vm exit */
Gleb Natapov44c11432009-05-11 13:35:52 +03003737
Joerg Roedele0231712010-02-24 18:59:10 +01003738 /*
3739 * Something prevents NMI from been injected. Single step over possible
3740 * problem (IRET or exception injection or interrupt shadow)
3741 */
Jan Kiszka6be7d302009-10-18 13:24:54 +02003742 svm->nmi_singlestep = true;
Gleb Natapov44c11432009-05-11 13:35:52 +03003743 svm->vmcb->save.rflags |= (X86_EFLAGS_TF | X86_EFLAGS_RF);
Jan Kiszkac8639012012-09-21 05:42:55 +02003744 update_db_bp_intercept(vcpu);
Eddie Dong85f455f2007-07-06 12:20:49 +03003745}
3746
Izik Eiduscbc94022007-10-25 00:29:55 +02003747static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
3748{
3749 return 0;
3750}
3751
Avi Kivityd9e368d2007-06-07 19:18:30 +03003752static void svm_flush_tlb(struct kvm_vcpu *vcpu)
3753{
Joerg Roedel38e5e922010-12-03 15:25:16 +01003754 struct vcpu_svm *svm = to_svm(vcpu);
3755
3756 if (static_cpu_has(X86_FEATURE_FLUSHBYASID))
3757 svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ASID;
3758 else
3759 svm->asid_generation--;
Avi Kivityd9e368d2007-06-07 19:18:30 +03003760}
3761
Avi Kivity04d2cc72007-09-10 18:10:54 +03003762static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
3763{
3764}
3765
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003766static inline void sync_cr8_to_lapic(struct kvm_vcpu *vcpu)
3767{
3768 struct vcpu_svm *svm = to_svm(vcpu);
3769
Joerg Roedel20307532010-11-29 17:51:48 +01003770 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
Joerg Roedel88ab24a2010-02-19 16:23:06 +01003771 return;
3772
Roedel, Joerg4ee546b2010-12-03 10:50:51 +01003773 if (!is_cr_intercept(svm, INTERCEPT_CR8_WRITE)) {
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003774 int cr8 = svm->vmcb->control.int_ctl & V_TPR_MASK;
Gleb Natapov615d5192009-04-21 17:45:05 +03003775 kvm_set_cr8(vcpu, cr8);
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003776 }
3777}
3778
Joerg Roedel649d6862008-04-16 16:51:15 +02003779static inline void sync_lapic_to_cr8(struct kvm_vcpu *vcpu)
3780{
3781 struct vcpu_svm *svm = to_svm(vcpu);
3782 u64 cr8;
3783
Joerg Roedel20307532010-11-29 17:51:48 +01003784 if (is_guest_mode(vcpu) && (vcpu->arch.hflags & HF_VINTR_MASK))
Joerg Roedel88ab24a2010-02-19 16:23:06 +01003785 return;
3786
Joerg Roedel649d6862008-04-16 16:51:15 +02003787 cr8 = kvm_get_cr8(vcpu);
3788 svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
3789 svm->vmcb->control.int_ctl |= cr8 & V_TPR_MASK;
3790}
3791
Gleb Natapov9222be12009-04-23 17:14:37 +03003792static void svm_complete_interrupts(struct vcpu_svm *svm)
3793{
3794 u8 vector;
3795 int type;
3796 u32 exitintinfo = svm->vmcb->control.exit_int_info;
Jan Kiszka66b71382010-02-23 17:47:56 +01003797 unsigned int3_injected = svm->int3_injected;
3798
3799 svm->int3_injected = 0;
Gleb Natapov9222be12009-04-23 17:14:37 +03003800
Avi Kivitybd3d1ec2011-02-03 15:29:52 +02003801 /*
3802 * If we've made progress since setting HF_IRET_MASK, we've
3803 * executed an IRET and can allow NMI injection.
3804 */
3805 if ((svm->vcpu.arch.hflags & HF_IRET_MASK)
3806 && kvm_rip_read(&svm->vcpu) != svm->nmi_iret_rip) {
Gleb Natapov44c11432009-05-11 13:35:52 +03003807 svm->vcpu.arch.hflags &= ~(HF_NMI_MASK | HF_IRET_MASK);
Avi Kivity3842d132010-07-27 12:30:24 +03003808 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3809 }
Gleb Natapov44c11432009-05-11 13:35:52 +03003810
Gleb Natapov9222be12009-04-23 17:14:37 +03003811 svm->vcpu.arch.nmi_injected = false;
3812 kvm_clear_exception_queue(&svm->vcpu);
3813 kvm_clear_interrupt_queue(&svm->vcpu);
3814
3815 if (!(exitintinfo & SVM_EXITINTINFO_VALID))
3816 return;
3817
Avi Kivity3842d132010-07-27 12:30:24 +03003818 kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
3819
Gleb Natapov9222be12009-04-23 17:14:37 +03003820 vector = exitintinfo & SVM_EXITINTINFO_VEC_MASK;
3821 type = exitintinfo & SVM_EXITINTINFO_TYPE_MASK;
3822
3823 switch (type) {
3824 case SVM_EXITINTINFO_TYPE_NMI:
3825 svm->vcpu.arch.nmi_injected = true;
3826 break;
3827 case SVM_EXITINTINFO_TYPE_EXEPT:
Jan Kiszka66b71382010-02-23 17:47:56 +01003828 /*
3829 * In case of software exceptions, do not reinject the vector,
3830 * but re-execute the instruction instead. Rewind RIP first
3831 * if we emulated INT3 before.
3832 */
3833 if (kvm_exception_is_soft(vector)) {
3834 if (vector == BP_VECTOR && int3_injected &&
3835 kvm_is_linear_rip(&svm->vcpu, svm->int3_rip))
3836 kvm_rip_write(&svm->vcpu,
3837 kvm_rip_read(&svm->vcpu) -
3838 int3_injected);
Alexander Graf219b65d2009-06-15 15:21:25 +02003839 break;
Jan Kiszka66b71382010-02-23 17:47:56 +01003840 }
Gleb Natapov9222be12009-04-23 17:14:37 +03003841 if (exitintinfo & SVM_EXITINTINFO_VALID_ERR) {
3842 u32 err = svm->vmcb->control.exit_int_info_err;
Joerg Roedelce7ddec2010-04-22 12:33:13 +02003843 kvm_requeue_exception_e(&svm->vcpu, vector, err);
Gleb Natapov9222be12009-04-23 17:14:37 +03003844
3845 } else
Joerg Roedelce7ddec2010-04-22 12:33:13 +02003846 kvm_requeue_exception(&svm->vcpu, vector);
Gleb Natapov9222be12009-04-23 17:14:37 +03003847 break;
3848 case SVM_EXITINTINFO_TYPE_INTR:
Gleb Natapov66fd3f72009-05-11 13:35:50 +03003849 kvm_queue_interrupt(&svm->vcpu, vector, false);
Gleb Natapov9222be12009-04-23 17:14:37 +03003850 break;
3851 default:
3852 break;
3853 }
3854}
3855
Avi Kivityb463a6f2010-07-20 15:06:17 +03003856static void svm_cancel_injection(struct kvm_vcpu *vcpu)
3857{
3858 struct vcpu_svm *svm = to_svm(vcpu);
3859 struct vmcb_control_area *control = &svm->vmcb->control;
3860
3861 control->exit_int_info = control->event_inj;
3862 control->exit_int_info_err = control->event_inj_err;
3863 control->event_inj = 0;
3864 svm_complete_interrupts(svm);
3865}
3866
Avi Kivity851ba692009-08-24 11:10:17 +03003867static void svm_vcpu_run(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -08003868{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003869 struct vcpu_svm *svm = to_svm(vcpu);
Avi Kivityd9e368d2007-06-07 19:18:30 +03003870
Joerg Roedel2041a062010-04-22 12:33:08 +02003871 svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
3872 svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
3873 svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
3874
Joerg Roedelcd3ff652009-10-09 16:08:26 +02003875 /*
3876 * A vmexit emulation is required before the vcpu can be executed
3877 * again.
3878 */
3879 if (unlikely(svm->nested.exit_required))
3880 return;
3881
Rusty Russelle756fc62007-07-30 20:07:08 +10003882 pre_svm_run(svm);
Avi Kivity6aa8b732006-12-10 02:21:36 -08003883
Joerg Roedel649d6862008-04-16 16:51:15 +02003884 sync_lapic_to_cr8(vcpu);
3885
Joerg Roedelcda0ffd2009-08-07 11:49:45 +02003886 svm->vmcb->save.cr2 = vcpu->arch.cr2;
Avi Kivity6aa8b732006-12-10 02:21:36 -08003887
Avi Kivity04d2cc72007-09-10 18:10:54 +03003888 clgi();
3889
3890 local_irq_enable();
Avi Kivity36241b82006-12-22 01:05:20 -08003891
Avi Kivity6aa8b732006-12-10 02:21:36 -08003892 asm volatile (
Avi Kivity74547662012-09-16 15:10:59 +03003893 "push %%" _ASM_BP "; \n\t"
3894 "mov %c[rbx](%[svm]), %%" _ASM_BX " \n\t"
3895 "mov %c[rcx](%[svm]), %%" _ASM_CX " \n\t"
3896 "mov %c[rdx](%[svm]), %%" _ASM_DX " \n\t"
3897 "mov %c[rsi](%[svm]), %%" _ASM_SI " \n\t"
3898 "mov %c[rdi](%[svm]), %%" _ASM_DI " \n\t"
3899 "mov %c[rbp](%[svm]), %%" _ASM_BP " \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003900#ifdef CONFIG_X86_64
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003901 "mov %c[r8](%[svm]), %%r8 \n\t"
3902 "mov %c[r9](%[svm]), %%r9 \n\t"
3903 "mov %c[r10](%[svm]), %%r10 \n\t"
3904 "mov %c[r11](%[svm]), %%r11 \n\t"
3905 "mov %c[r12](%[svm]), %%r12 \n\t"
3906 "mov %c[r13](%[svm]), %%r13 \n\t"
3907 "mov %c[r14](%[svm]), %%r14 \n\t"
3908 "mov %c[r15](%[svm]), %%r15 \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003909#endif
3910
Avi Kivity6aa8b732006-12-10 02:21:36 -08003911 /* Enter guest mode */
Avi Kivity74547662012-09-16 15:10:59 +03003912 "push %%" _ASM_AX " \n\t"
3913 "mov %c[vmcb](%[svm]), %%" _ASM_AX " \n\t"
Avi Kivity4ecac3f2008-05-13 13:23:38 +03003914 __ex(SVM_VMLOAD) "\n\t"
3915 __ex(SVM_VMRUN) "\n\t"
3916 __ex(SVM_VMSAVE) "\n\t"
Avi Kivity74547662012-09-16 15:10:59 +03003917 "pop %%" _ASM_AX " \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003918
3919 /* Save guest registers, load host registers */
Avi Kivity74547662012-09-16 15:10:59 +03003920 "mov %%" _ASM_BX ", %c[rbx](%[svm]) \n\t"
3921 "mov %%" _ASM_CX ", %c[rcx](%[svm]) \n\t"
3922 "mov %%" _ASM_DX ", %c[rdx](%[svm]) \n\t"
3923 "mov %%" _ASM_SI ", %c[rsi](%[svm]) \n\t"
3924 "mov %%" _ASM_DI ", %c[rdi](%[svm]) \n\t"
3925 "mov %%" _ASM_BP ", %c[rbp](%[svm]) \n\t"
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003926#ifdef CONFIG_X86_64
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003927 "mov %%r8, %c[r8](%[svm]) \n\t"
3928 "mov %%r9, %c[r9](%[svm]) \n\t"
3929 "mov %%r10, %c[r10](%[svm]) \n\t"
3930 "mov %%r11, %c[r11](%[svm]) \n\t"
3931 "mov %%r12, %c[r12](%[svm]) \n\t"
3932 "mov %%r13, %c[r13](%[svm]) \n\t"
3933 "mov %%r14, %c[r14](%[svm]) \n\t"
3934 "mov %%r15, %c[r15](%[svm]) \n\t"
Avi Kivity6aa8b732006-12-10 02:21:36 -08003935#endif
Avi Kivity74547662012-09-16 15:10:59 +03003936 "pop %%" _ASM_BP
Avi Kivity6aa8b732006-12-10 02:21:36 -08003937 :
Rusty Russellfb3f0f52007-07-27 17:16:56 +10003938 : [svm]"a"(svm),
Avi Kivity6aa8b732006-12-10 02:21:36 -08003939 [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003940 [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
3941 [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
3942 [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
3943 [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
3944 [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
3945 [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
Avi Kivity05b3e0c2006-12-13 00:33:45 -08003946#ifdef CONFIG_X86_64
Zhang Xiantaoad312c72007-12-13 23:50:52 +08003947 , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
3948 [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
3949 [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
3950 [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
3951 [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
3952 [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
3953 [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
3954 [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
Avi Kivity6aa8b732006-12-10 02:21:36 -08003955#endif
Laurent Vivier54a08c02007-10-25 14:18:53 +02003956 : "cc", "memory"
3957#ifdef CONFIG_X86_64
Avi Kivity74547662012-09-16 15:10:59 +03003958 , "rbx", "rcx", "rdx", "rsi", "rdi"
Laurent Vivier54a08c02007-10-25 14:18:53 +02003959 , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
Avi Kivity74547662012-09-16 15:10:59 +03003960#else
3961 , "ebx", "ecx", "edx", "esi", "edi"
Laurent Vivier54a08c02007-10-25 14:18:53 +02003962#endif
3963 );
Avi Kivity6aa8b732006-12-10 02:21:36 -08003964
Avi Kivity82ca2d12010-10-21 12:20:34 +02003965#ifdef CONFIG_X86_64
3966 wrmsrl(MSR_GS_BASE, svm->host.gs_base);
3967#else
Avi Kivitydacccfd2010-10-21 12:20:33 +02003968 loadsegment(fs, svm->host.fs);
Avi Kivity831ca602011-03-08 16:09:51 +02003969#ifndef CONFIG_X86_32_LAZY_GS
3970 loadsegment(gs, svm->host.gs);
3971#endif
Avi Kivity9581d442010-10-19 16:46:55 +02003972#endif
Avi Kivity6aa8b732006-12-10 02:21:36 -08003973
3974 reload_tss(vcpu);
3975
Avi Kivity56ba47d2007-11-07 17:14:18 +02003976 local_irq_disable();
3977
Avi Kivity13c34e02010-10-21 12:20:31 +02003978 vcpu->arch.cr2 = svm->vmcb->save.cr2;
3979 vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
3980 vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
3981 vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
3982
Jan Kiszka1e2b1dd2011-09-12 10:52:24 +02003983 trace_kvm_exit(svm->vmcb->control.exit_code, vcpu, KVM_ISA_SVM);
3984
Joerg Roedel3781c012011-01-14 16:45:02 +01003985 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
3986 kvm_before_handle_nmi(&svm->vcpu);
3987
3988 stgi();
3989
3990 /* Any pending NMI will happen here */
3991
3992 if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
3993 kvm_after_handle_nmi(&svm->vcpu);
3994
Joerg Roedeld7bf8222008-04-16 16:51:17 +02003995 sync_cr8_to_lapic(vcpu);
3996
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04003997 svm->next_rip = 0;
Gleb Natapov9222be12009-04-23 17:14:37 +03003998
Joerg Roedel38e5e922010-12-03 15:25:16 +01003999 svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
4000
Gleb Natapov631bc482010-10-14 11:22:52 +02004001 /* if exit due to PF check for async PF */
4002 if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
4003 svm->apf_reason = kvm_read_and_reset_pf_reason();
4004
Avi Kivity6de4f3a2009-05-31 22:58:47 +03004005 if (npt_enabled) {
4006 vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
4007 vcpu->arch.regs_dirty &= ~(1 << VCPU_EXREG_PDPTR);
4008 }
Joerg Roedelfe5913e2010-05-17 14:43:34 +02004009
4010 /*
4011 * We need to handle MC intercepts here before the vcpu has a chance to
4012 * change the physical cpu
4013 */
4014 if (unlikely(svm->vmcb->control.exit_code ==
4015 SVM_EXIT_EXCP_BASE + MC_VECTOR))
4016 svm_handle_mce(svm);
Roedel, Joerg8d28fec2010-12-03 13:15:21 +01004017
4018 mark_all_clean(svm->vmcb);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004019}
4020
Avi Kivity6aa8b732006-12-10 02:21:36 -08004021static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
4022{
Gregory Haskinsa2fa3e92007-07-27 08:13:10 -04004023 struct vcpu_svm *svm = to_svm(vcpu);
4024
4025 svm->vmcb->save.cr3 = root;
Joerg Roedeldcca1a62010-12-03 11:45:54 +01004026 mark_dirty(svm->vmcb, VMCB_CR);
Joerg Roedelf40f6a42010-12-03 15:25:15 +01004027 svm_flush_tlb(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004028}
4029
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004030static void set_tdp_cr3(struct kvm_vcpu *vcpu, unsigned long root)
4031{
4032 struct vcpu_svm *svm = to_svm(vcpu);
4033
4034 svm->vmcb->control.nested_cr3 = root;
Joerg Roedelb2747162010-12-03 11:45:53 +01004035 mark_dirty(svm->vmcb, VMCB_NPT);
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004036
4037 /* Also sync guest cr3 here in case we live migrate */
Avi Kivity9f8fe502010-12-05 17:30:00 +02004038 svm->vmcb->save.cr3 = kvm_read_cr3(vcpu);
Joerg Roedeldcca1a62010-12-03 11:45:54 +01004039 mark_dirty(svm->vmcb, VMCB_CR);
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004040
Joerg Roedelf40f6a42010-12-03 15:25:15 +01004041 svm_flush_tlb(vcpu);
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004042}
4043
Avi Kivity6aa8b732006-12-10 02:21:36 -08004044static int is_disabled(void)
4045{
Joerg Roedel6031a612007-06-22 12:29:50 +03004046 u64 vm_cr;
4047
4048 rdmsrl(MSR_VM_CR, vm_cr);
4049 if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
4050 return 1;
4051
Avi Kivity6aa8b732006-12-10 02:21:36 -08004052 return 0;
4053}
4054
Ingo Molnar102d8322007-02-19 14:37:47 +02004055static void
4056svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
4057{
4058 /*
4059 * Patch in the VMMCALL instruction:
4060 */
4061 hypercall[0] = 0x0f;
4062 hypercall[1] = 0x01;
4063 hypercall[2] = 0xd9;
Ingo Molnar102d8322007-02-19 14:37:47 +02004064}
4065
Yang, Sheng002c7f72007-07-31 14:23:01 +03004066static void svm_check_processor_compat(void *rtn)
4067{
4068 *(int *)rtn = 0;
4069}
4070
Avi Kivity774ead32007-12-26 13:57:04 +02004071static bool svm_cpu_has_accelerated_tpr(void)
4072{
4073 return false;
4074}
4075
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004076static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
Sheng Yang64d4d522008-10-09 16:01:57 +08004077{
4078 return 0;
4079}
4080
Sheng Yang0e851882009-12-18 16:48:46 +08004081static void svm_cpuid_update(struct kvm_vcpu *vcpu)
4082{
4083}
4084
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004085static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
4086{
Joerg Roedelc2c63a42010-04-22 12:33:12 +02004087 switch (func) {
Joerg Roedel4c62a2d2010-09-10 17:31:06 +02004088 case 0x80000001:
4089 if (nested)
4090 entry->ecx |= (1 << 2); /* Set SVM bit */
4091 break;
Joerg Roedelc2c63a42010-04-22 12:33:12 +02004092 case 0x8000000A:
4093 entry->eax = 1; /* SVM revision 1 */
4094 entry->ebx = 8; /* Lets support 8 ASIDs in case we add proper
4095 ASID emulation to nested SVM */
4096 entry->ecx = 0; /* Reserved */
Joerg Roedel7a190662010-07-27 18:14:21 +02004097 entry->edx = 0; /* Per default do not support any
4098 additional features */
4099
4100 /* Support next_rip if host supports it */
Avi Kivity2a6b20b2010-11-09 16:15:42 +02004101 if (boot_cpu_has(X86_FEATURE_NRIPS))
Joerg Roedel7a190662010-07-27 18:14:21 +02004102 entry->edx |= SVM_FEATURE_NRIP;
Joerg Roedelc2c63a42010-04-22 12:33:12 +02004103
Joerg Roedel3d4aeaa2010-09-10 17:31:05 +02004104 /* Support NPT for the guest if enabled */
4105 if (npt_enabled)
4106 entry->edx |= SVM_FEATURE_NPT;
4107
Joerg Roedelc2c63a42010-04-22 12:33:12 +02004108 break;
4109 }
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004110}
4111
Sheng Yang17cc3932010-01-05 19:02:27 +08004112static int svm_get_lpage_level(void)
Joerg Roedel344f4142009-07-27 16:30:48 +02004113{
Sheng Yang17cc3932010-01-05 19:02:27 +08004114 return PT_PDPE_LEVEL;
Joerg Roedel344f4142009-07-27 16:30:48 +02004115}
4116
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004117static bool svm_rdtscp_supported(void)
4118{
4119 return false;
4120}
4121
Mao, Junjiead756a12012-07-02 01:18:48 +00004122static bool svm_invpcid_supported(void)
4123{
4124 return false;
4125}
4126
Paolo Bonzini93c4adc2014-03-05 23:19:52 +01004127static bool svm_mpx_supported(void)
4128{
4129 return false;
4130}
4131
Wanpeng Li55412b22014-12-02 19:21:30 +08004132static bool svm_xsaves_supported(void)
4133{
4134 return false;
4135}
4136
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004137static bool svm_has_wbinvd_exit(void)
4138{
4139 return true;
4140}
4141
Avi Kivity02daab22009-12-30 12:40:26 +02004142static void svm_fpu_deactivate(struct kvm_vcpu *vcpu)
4143{
4144 struct vcpu_svm *svm = to_svm(vcpu);
4145
Joerg Roedel18c918c2010-11-30 18:03:59 +01004146 set_exception_intercept(svm, NM_VECTOR);
Joerg Roedel66a562f2010-02-19 16:23:08 +01004147 update_cr0_intercept(svm);
Avi Kivity02daab22009-12-30 12:40:26 +02004148}
4149
Joerg Roedel80612522011-04-04 12:39:33 +02004150#define PRE_EX(exit) { .exit_code = (exit), \
Avi Kivity40e19b52011-04-21 12:35:41 +03004151 .stage = X86_ICPT_PRE_EXCEPT, }
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004152#define POST_EX(exit) { .exit_code = (exit), \
Avi Kivity40e19b52011-04-21 12:35:41 +03004153 .stage = X86_ICPT_POST_EXCEPT, }
Joerg Roedeld7eb8202011-04-04 12:39:32 +02004154#define POST_MEM(exit) { .exit_code = (exit), \
Avi Kivity40e19b52011-04-21 12:35:41 +03004155 .stage = X86_ICPT_POST_MEMACCESS, }
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004156
Mathias Krause09941fb2012-08-30 01:30:20 +02004157static const struct __x86_intercept {
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004158 u32 exit_code;
4159 enum x86_intercept_stage stage;
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004160} x86_intercept_map[] = {
4161 [x86_intercept_cr_read] = POST_EX(SVM_EXIT_READ_CR0),
4162 [x86_intercept_cr_write] = POST_EX(SVM_EXIT_WRITE_CR0),
4163 [x86_intercept_clts] = POST_EX(SVM_EXIT_WRITE_CR0),
4164 [x86_intercept_lmsw] = POST_EX(SVM_EXIT_WRITE_CR0),
4165 [x86_intercept_smsw] = POST_EX(SVM_EXIT_READ_CR0),
Joerg Roedel3b88e412011-04-04 12:39:29 +02004166 [x86_intercept_dr_read] = POST_EX(SVM_EXIT_READ_DR0),
4167 [x86_intercept_dr_write] = POST_EX(SVM_EXIT_WRITE_DR0),
Joerg Roedeldee6bb72011-04-04 12:39:30 +02004168 [x86_intercept_sldt] = POST_EX(SVM_EXIT_LDTR_READ),
4169 [x86_intercept_str] = POST_EX(SVM_EXIT_TR_READ),
4170 [x86_intercept_lldt] = POST_EX(SVM_EXIT_LDTR_WRITE),
4171 [x86_intercept_ltr] = POST_EX(SVM_EXIT_TR_WRITE),
4172 [x86_intercept_sgdt] = POST_EX(SVM_EXIT_GDTR_READ),
4173 [x86_intercept_sidt] = POST_EX(SVM_EXIT_IDTR_READ),
4174 [x86_intercept_lgdt] = POST_EX(SVM_EXIT_GDTR_WRITE),
4175 [x86_intercept_lidt] = POST_EX(SVM_EXIT_IDTR_WRITE),
Joerg Roedel01de8b02011-04-04 12:39:31 +02004176 [x86_intercept_vmrun] = POST_EX(SVM_EXIT_VMRUN),
4177 [x86_intercept_vmmcall] = POST_EX(SVM_EXIT_VMMCALL),
4178 [x86_intercept_vmload] = POST_EX(SVM_EXIT_VMLOAD),
4179 [x86_intercept_vmsave] = POST_EX(SVM_EXIT_VMSAVE),
4180 [x86_intercept_stgi] = POST_EX(SVM_EXIT_STGI),
4181 [x86_intercept_clgi] = POST_EX(SVM_EXIT_CLGI),
4182 [x86_intercept_skinit] = POST_EX(SVM_EXIT_SKINIT),
4183 [x86_intercept_invlpga] = POST_EX(SVM_EXIT_INVLPGA),
Joerg Roedeld7eb8202011-04-04 12:39:32 +02004184 [x86_intercept_rdtscp] = POST_EX(SVM_EXIT_RDTSCP),
4185 [x86_intercept_monitor] = POST_MEM(SVM_EXIT_MONITOR),
4186 [x86_intercept_mwait] = POST_EX(SVM_EXIT_MWAIT),
Joerg Roedel80612522011-04-04 12:39:33 +02004187 [x86_intercept_invlpg] = POST_EX(SVM_EXIT_INVLPG),
4188 [x86_intercept_invd] = POST_EX(SVM_EXIT_INVD),
4189 [x86_intercept_wbinvd] = POST_EX(SVM_EXIT_WBINVD),
4190 [x86_intercept_wrmsr] = POST_EX(SVM_EXIT_MSR),
4191 [x86_intercept_rdtsc] = POST_EX(SVM_EXIT_RDTSC),
4192 [x86_intercept_rdmsr] = POST_EX(SVM_EXIT_MSR),
4193 [x86_intercept_rdpmc] = POST_EX(SVM_EXIT_RDPMC),
4194 [x86_intercept_cpuid] = PRE_EX(SVM_EXIT_CPUID),
4195 [x86_intercept_rsm] = PRE_EX(SVM_EXIT_RSM),
Joerg Roedelbf608f82011-04-04 12:39:34 +02004196 [x86_intercept_pause] = PRE_EX(SVM_EXIT_PAUSE),
4197 [x86_intercept_pushf] = PRE_EX(SVM_EXIT_PUSHF),
4198 [x86_intercept_popf] = PRE_EX(SVM_EXIT_POPF),
4199 [x86_intercept_intn] = PRE_EX(SVM_EXIT_SWINT),
4200 [x86_intercept_iret] = PRE_EX(SVM_EXIT_IRET),
4201 [x86_intercept_icebp] = PRE_EX(SVM_EXIT_ICEBP),
4202 [x86_intercept_hlt] = POST_EX(SVM_EXIT_HLT),
Joerg Roedelf6511932011-04-04 12:39:35 +02004203 [x86_intercept_in] = POST_EX(SVM_EXIT_IOIO),
4204 [x86_intercept_ins] = POST_EX(SVM_EXIT_IOIO),
4205 [x86_intercept_out] = POST_EX(SVM_EXIT_IOIO),
4206 [x86_intercept_outs] = POST_EX(SVM_EXIT_IOIO),
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004207};
4208
Joerg Roedel80612522011-04-04 12:39:33 +02004209#undef PRE_EX
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004210#undef POST_EX
Joerg Roedeld7eb8202011-04-04 12:39:32 +02004211#undef POST_MEM
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004212
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004213static int svm_check_intercept(struct kvm_vcpu *vcpu,
4214 struct x86_instruction_info *info,
4215 enum x86_intercept_stage stage)
4216{
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004217 struct vcpu_svm *svm = to_svm(vcpu);
4218 int vmexit, ret = X86EMUL_CONTINUE;
4219 struct __x86_intercept icpt_info;
4220 struct vmcb *vmcb = svm->vmcb;
4221
4222 if (info->intercept >= ARRAY_SIZE(x86_intercept_map))
4223 goto out;
4224
4225 icpt_info = x86_intercept_map[info->intercept];
4226
Avi Kivity40e19b52011-04-21 12:35:41 +03004227 if (stage != icpt_info.stage)
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004228 goto out;
4229
4230 switch (icpt_info.exit_code) {
4231 case SVM_EXIT_READ_CR0:
4232 if (info->intercept == x86_intercept_cr_read)
4233 icpt_info.exit_code += info->modrm_reg;
4234 break;
4235 case SVM_EXIT_WRITE_CR0: {
4236 unsigned long cr0, val;
4237 u64 intercept;
4238
4239 if (info->intercept == x86_intercept_cr_write)
4240 icpt_info.exit_code += info->modrm_reg;
4241
Jan Kiszka62baf442014-06-29 21:55:53 +02004242 if (icpt_info.exit_code != SVM_EXIT_WRITE_CR0 ||
4243 info->intercept == x86_intercept_clts)
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004244 break;
4245
4246 intercept = svm->nested.intercept;
4247
4248 if (!(intercept & (1ULL << INTERCEPT_SELECTIVE_CR0)))
4249 break;
4250
4251 cr0 = vcpu->arch.cr0 & ~SVM_CR0_SELECTIVE_MASK;
4252 val = info->src_val & ~SVM_CR0_SELECTIVE_MASK;
4253
4254 if (info->intercept == x86_intercept_lmsw) {
4255 cr0 &= 0xfUL;
4256 val &= 0xfUL;
4257 /* lmsw can't clear PE - catch this here */
4258 if (cr0 & X86_CR0_PE)
4259 val |= X86_CR0_PE;
4260 }
4261
4262 if (cr0 ^ val)
4263 icpt_info.exit_code = SVM_EXIT_CR0_SEL_WRITE;
4264
4265 break;
4266 }
Joerg Roedel3b88e412011-04-04 12:39:29 +02004267 case SVM_EXIT_READ_DR0:
4268 case SVM_EXIT_WRITE_DR0:
4269 icpt_info.exit_code += info->modrm_reg;
4270 break;
Joerg Roedel80612522011-04-04 12:39:33 +02004271 case SVM_EXIT_MSR:
4272 if (info->intercept == x86_intercept_wrmsr)
4273 vmcb->control.exit_info_1 = 1;
4274 else
4275 vmcb->control.exit_info_1 = 0;
4276 break;
Joerg Roedelbf608f82011-04-04 12:39:34 +02004277 case SVM_EXIT_PAUSE:
4278 /*
4279 * We get this for NOP only, but pause
4280 * is rep not, check this here
4281 */
4282 if (info->rep_prefix != REPE_PREFIX)
4283 goto out;
Joerg Roedelf6511932011-04-04 12:39:35 +02004284 case SVM_EXIT_IOIO: {
4285 u64 exit_info;
4286 u32 bytes;
4287
Joerg Roedelf6511932011-04-04 12:39:35 +02004288 if (info->intercept == x86_intercept_in ||
4289 info->intercept == x86_intercept_ins) {
Jan Kiszka6cbc5f52014-06-30 12:52:55 +02004290 exit_info = ((info->src_val & 0xffff) << 16) |
4291 SVM_IOIO_TYPE_MASK;
Joerg Roedelf6511932011-04-04 12:39:35 +02004292 bytes = info->dst_bytes;
Jan Kiszka6493f152014-06-30 11:07:05 +02004293 } else {
Jan Kiszka6cbc5f52014-06-30 12:52:55 +02004294 exit_info = (info->dst_val & 0xffff) << 16;
Jan Kiszka6493f152014-06-30 11:07:05 +02004295 bytes = info->src_bytes;
Joerg Roedelf6511932011-04-04 12:39:35 +02004296 }
4297
4298 if (info->intercept == x86_intercept_outs ||
4299 info->intercept == x86_intercept_ins)
4300 exit_info |= SVM_IOIO_STR_MASK;
4301
4302 if (info->rep_prefix)
4303 exit_info |= SVM_IOIO_REP_MASK;
4304
4305 bytes = min(bytes, 4u);
4306
4307 exit_info |= bytes << SVM_IOIO_SIZE_SHIFT;
4308
4309 exit_info |= (u32)info->ad_bytes << (SVM_IOIO_ASIZE_SHIFT - 1);
4310
4311 vmcb->control.exit_info_1 = exit_info;
4312 vmcb->control.exit_info_2 = info->next_rip;
4313
4314 break;
4315 }
Joerg Roedelcfec82c2011-04-04 12:39:28 +02004316 default:
4317 break;
4318 }
4319
4320 vmcb->control.next_rip = info->next_rip;
4321 vmcb->control.exit_code = icpt_info.exit_code;
4322 vmexit = nested_svm_exit_handled(svm);
4323
4324 ret = (vmexit == NESTED_EXIT_DONE) ? X86EMUL_INTERCEPTED
4325 : X86EMUL_CONTINUE;
4326
4327out:
4328 return ret;
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004329}
4330
Yang Zhanga547c6d2013-04-11 19:25:10 +08004331static void svm_handle_external_intr(struct kvm_vcpu *vcpu)
4332{
4333 local_irq_enable();
4334}
4335
Radim Krčmářae97a3b2014-08-21 18:08:06 +02004336static void svm_sched_in(struct kvm_vcpu *vcpu, int cpu)
4337{
4338}
4339
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +03004340static struct kvm_x86_ops svm_x86_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08004341 .cpu_has_kvm_support = has_svm,
4342 .disabled_by_bios = is_disabled,
4343 .hardware_setup = svm_hardware_setup,
4344 .hardware_unsetup = svm_hardware_unsetup,
Yang, Sheng002c7f72007-07-31 14:23:01 +03004345 .check_processor_compatibility = svm_check_processor_compat,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004346 .hardware_enable = svm_hardware_enable,
4347 .hardware_disable = svm_hardware_disable,
Avi Kivity774ead32007-12-26 13:57:04 +02004348 .cpu_has_accelerated_tpr = svm_cpu_has_accelerated_tpr,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004349
4350 .vcpu_create = svm_create_vcpu,
4351 .vcpu_free = svm_free_vcpu,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004352 .vcpu_reset = svm_vcpu_reset,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004353
Avi Kivity04d2cc72007-09-10 18:10:54 +03004354 .prepare_guest_switch = svm_prepare_guest_switch,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004355 .vcpu_load = svm_vcpu_load,
4356 .vcpu_put = svm_vcpu_put,
4357
Jan Kiszkac8639012012-09-21 05:42:55 +02004358 .update_db_bp_intercept = update_db_bp_intercept,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004359 .get_msr = svm_get_msr,
4360 .set_msr = svm_set_msr,
4361 .get_segment_base = svm_get_segment_base,
4362 .get_segment = svm_get_segment,
4363 .set_segment = svm_set_segment,
Izik Eidus2e4d2652008-03-24 19:38:34 +02004364 .get_cpl = svm_get_cpl,
Rusty Russell1747fb72007-09-06 01:21:32 +10004365 .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
Avi Kivitye8467fd2009-12-29 18:43:06 +02004366 .decache_cr0_guest_bits = svm_decache_cr0_guest_bits,
Avi Kivityaff48ba2010-12-05 18:56:11 +02004367 .decache_cr3 = svm_decache_cr3,
Anthony Liguori25c4c272007-04-27 09:29:21 +03004368 .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004369 .set_cr0 = svm_set_cr0,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004370 .set_cr3 = svm_set_cr3,
4371 .set_cr4 = svm_set_cr4,
4372 .set_efer = svm_set_efer,
4373 .get_idt = svm_get_idt,
4374 .set_idt = svm_set_idt,
4375 .get_gdt = svm_get_gdt,
4376 .set_gdt = svm_set_gdt,
Jan Kiszka73aaf249e2014-01-04 18:47:16 +01004377 .get_dr6 = svm_get_dr6,
4378 .set_dr6 = svm_set_dr6,
Gleb Natapov020df072010-04-13 10:05:23 +03004379 .set_dr7 = svm_set_dr7,
Paolo Bonzinifacb0132014-02-21 10:32:27 +01004380 .sync_dirty_debug_regs = svm_sync_dirty_debug_regs,
Avi Kivity6de4f3a2009-05-31 22:58:47 +03004381 .cache_reg = svm_cache_reg,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004382 .get_rflags = svm_get_rflags,
4383 .set_rflags = svm_set_rflags,
Avi Kivity02daab22009-12-30 12:40:26 +02004384 .fpu_deactivate = svm_fpu_deactivate,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004385
Avi Kivity6aa8b732006-12-10 02:21:36 -08004386 .tlb_flush = svm_flush_tlb,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004387
Avi Kivity6aa8b732006-12-10 02:21:36 -08004388 .run = svm_vcpu_run,
Avi Kivity04d2cc72007-09-10 18:10:54 +03004389 .handle_exit = handle_exit,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004390 .skip_emulated_instruction = skip_emulated_instruction,
Glauber Costa2809f5d2009-05-12 16:21:05 -04004391 .set_interrupt_shadow = svm_set_interrupt_shadow,
4392 .get_interrupt_shadow = svm_get_interrupt_shadow,
Ingo Molnar102d8322007-02-19 14:37:47 +02004393 .patch_hypercall = svm_patch_hypercall,
Eddie Dong2a8067f2007-08-06 16:29:07 +03004394 .set_irq = svm_set_irq,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004395 .set_nmi = svm_inject_nmi,
Avi Kivity298101d2007-11-25 13:41:11 +02004396 .queue_exception = svm_queue_exception,
Avi Kivityb463a6f2010-07-20 15:06:17 +03004397 .cancel_injection = svm_cancel_injection,
Gleb Natapov78646122009-03-23 12:12:11 +02004398 .interrupt_allowed = svm_interrupt_allowed,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004399 .nmi_allowed = svm_nmi_allowed,
Jan Kiszka3cfc3092009-11-12 01:04:25 +01004400 .get_nmi_mask = svm_get_nmi_mask,
4401 .set_nmi_mask = svm_set_nmi_mask,
Gleb Natapov95ba8273132009-04-21 17:45:08 +03004402 .enable_nmi_window = enable_nmi_window,
4403 .enable_irq_window = enable_irq_window,
4404 .update_cr8_intercept = update_cr8_intercept,
Yang Zhang8d146952013-01-25 10:18:50 +08004405 .set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode,
Yang Zhangc7c9c562013-01-25 10:18:51 +08004406 .vm_has_apicv = svm_vm_has_apicv,
4407 .load_eoi_exitmap = svm_load_eoi_exitmap,
Yang Zhanga20ed542013-04-11 19:25:15 +08004408 .sync_pir_to_irr = svm_sync_pir_to_irr,
Izik Eiduscbc94022007-10-25 00:29:55 +02004409
4410 .set_tss_addr = svm_set_tss_addr,
Sheng Yang67253af2008-04-25 10:20:22 +08004411 .get_tdp_level = get_npt_level,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004412 .get_mt_mask = svm_get_mt_mask,
Marcelo Tosatti229456f2009-06-17 09:22:14 -03004413
Avi Kivity586f9602010-11-18 13:09:54 +02004414 .get_exit_info = svm_get_exit_info,
Avi Kivity586f9602010-11-18 13:09:54 +02004415
Sheng Yang17cc3932010-01-05 19:02:27 +08004416 .get_lpage_level = svm_get_lpage_level,
Sheng Yang0e851882009-12-18 16:48:46 +08004417
4418 .cpuid_update = svm_cpuid_update,
Sheng Yang4e47c7a2009-12-18 16:48:47 +08004419
4420 .rdtscp_supported = svm_rdtscp_supported,
Mao, Junjiead756a12012-07-02 01:18:48 +00004421 .invpcid_supported = svm_invpcid_supported,
Paolo Bonzini93c4adc2014-03-05 23:19:52 +01004422 .mpx_supported = svm_mpx_supported,
Wanpeng Li55412b22014-12-02 19:21:30 +08004423 .xsaves_supported = svm_xsaves_supported,
Joerg Roedeld4330ef2010-04-22 12:33:11 +02004424
4425 .set_supported_cpuid = svm_set_supported_cpuid,
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004426
4427 .has_wbinvd_exit = svm_has_wbinvd_exit,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004428
Joerg Roedel4051b182011-03-25 09:44:49 +01004429 .set_tsc_khz = svm_set_tsc_khz,
Will Auldba904632012-11-29 12:42:50 -08004430 .read_tsc_offset = svm_read_tsc_offset,
Zachary Amsden99e3e302010-08-19 22:07:17 -10004431 .write_tsc_offset = svm_write_tsc_offset,
Zachary Amsdene48672f2010-08-19 22:07:23 -10004432 .adjust_tsc_offset = svm_adjust_tsc_offset,
Joerg Roedel857e4092011-03-25 09:44:50 +01004433 .compute_tsc_offset = svm_compute_tsc_offset,
Nadav Har'Eld5c17852011-08-02 15:54:20 +03004434 .read_l1_tsc = svm_read_l1_tsc,
Joerg Roedel1c97f0a2010-09-10 17:30:41 +02004435
4436 .set_tdp_cr3 = set_tdp_cr3,
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004437
4438 .check_intercept = svm_check_intercept,
Yang Zhanga547c6d2013-04-11 19:25:10 +08004439 .handle_external_intr = svm_handle_external_intr,
Radim Krčmářae97a3b2014-08-21 18:08:06 +02004440
4441 .sched_in = svm_sched_in,
Avi Kivity6aa8b732006-12-10 02:21:36 -08004442};
4443
4444static int __init svm_init(void)
4445{
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004446 return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
Avi Kivity0ee75be2010-04-28 15:39:01 +03004447 __alignof__(struct vcpu_svm), THIS_MODULE);
Avi Kivity6aa8b732006-12-10 02:21:36 -08004448}
4449
4450static void __exit svm_exit(void)
4451{
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08004452 kvm_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08004453}
4454
4455module_init(svm_init)
4456module_exit(svm_exit)