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Carsten Otte043405e2007-10-10 17:16:19 +02001/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * derived from drivers/kvm/kvm_main.c
5 *
6 * Copyright (C) 2006 Qumranet, Inc.
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +03007 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
Nicolas Kaiser9611c182010-10-06 14:23:22 +02009 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
Carsten Otte043405e2007-10-10 17:16:19 +020010 *
11 * Authors:
12 * Avi Kivity <avi@qumranet.com>
13 * Yaniv Kamay <yaniv@qumranet.com>
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +030014 * Amit Shah <amit.shah@qumranet.com>
15 * Ben-Ami Yassour <benami@il.ibm.com>
Carsten Otte043405e2007-10-10 17:16:19 +020016 *
17 * This work is licensed under the terms of the GNU GPL, version 2. See
18 * the COPYING file in the top-level directory.
19 *
20 */
21
Avi Kivityedf88412007-12-16 11:02:48 +020022#include <linux/kvm_host.h>
Carsten Otte313a3dc2007-10-11 19:16:52 +020023#include "irq.h"
Zhang Xiantao1d737c82007-12-14 09:35:10 +080024#include "mmu.h"
Sheng Yang78376992008-01-28 05:10:22 +080025#include "i8254.h"
Izik Eidus37817f22008-03-24 23:14:53 +020026#include "tss.h"
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030027#include "kvm_cache_regs.h"
Avi Kivity26eef702008-07-03 14:59:22 +030028#include "x86.h"
Avi Kivity00b27a32011-11-23 16:30:32 +020029#include "cpuid.h"
Carsten Otte313a3dc2007-10-11 19:16:52 +020030
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -020031#include <linux/clocksource.h>
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +030032#include <linux/interrupt.h>
Carsten Otte313a3dc2007-10-11 19:16:52 +020033#include <linux/kvm.h>
34#include <linux/fs.h>
35#include <linux/vmalloc.h>
Carsten Otte5fb76f92007-10-29 16:08:51 +010036#include <linux/module.h>
Zhang Xiantao0de10342007-11-20 16:25:04 +080037#include <linux/mman.h>
Marcelo Tosatti2bacc552007-12-12 10:46:12 -050038#include <linux/highmem.h>
Joerg Roedel19de40a2008-12-03 14:43:34 +010039#include <linux/iommu.h>
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +030040#include <linux/intel-iommu.h>
Gerd Hoffmannc8076602009-02-04 17:52:04 +010041#include <linux/cpufreq.h>
Avi Kivity18863bd2009-09-07 11:12:18 +030042#include <linux/user-return-notifier.h>
Marcelo Tosattia983fb22009-12-23 14:35:23 -020043#include <linux/srcu.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090044#include <linux/slab.h>
Zhang, Yanminff9d07a2010-04-19 13:32:45 +080045#include <linux/perf_event.h>
Lai Jiangshan7bee3422010-06-02 17:06:03 +080046#include <linux/uaccess.h>
Gleb Natapovaf585b92010-10-14 11:22:46 +020047#include <linux/hash.h>
Joerg Roedela1b60c12011-09-06 18:46:34 +020048#include <linux/pci.h>
Avi Kivityaec51dc2009-07-01 16:01:02 +030049#include <trace/events/kvm.h>
Xiao Guangrong2ed152a2010-03-10 19:00:43 +080050
Marcelo Tosatti229456f2009-06-17 09:22:14 -030051#define CREATE_TRACE_POINTS
52#include "trace.h"
Carsten Otte043405e2007-10-10 17:16:19 +020053
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +020054#include <asm/debugreg.h>
Zhang Xiantaod825ed02007-11-14 20:08:51 +080055#include <asm/msr.h>
Avi Kivitya5f61302008-02-20 17:57:21 +020056#include <asm/desc.h>
Sheng Yang0bed3b52008-10-09 16:01:54 +080057#include <asm/mtrr.h>
Huang Ying890ca9a2009-05-11 16:48:15 +080058#include <asm/mce.h>
Sheng Yang7cf30852010-05-17 17:08:27 +080059#include <asm/i387.h>
Linus Torvalds1361b832012-02-21 13:19:22 -080060#include <asm/fpu-internal.h> /* Ugh! */
Sheng Yang98918832010-05-17 17:08:28 +080061#include <asm/xcr.h>
Zachary Amsden1d5f0662010-08-19 22:07:30 -100062#include <asm/pvclock.h>
Avi Kivity217fc9c2010-08-26 13:38:03 +030063#include <asm/div64.h>
Carsten Otte043405e2007-10-10 17:16:19 +020064
Carsten Otte313a3dc2007-10-11 19:16:52 +020065#define MAX_IO_MSRS 256
Huang Ying890ca9a2009-05-11 16:48:15 +080066#define KVM_MAX_MCE_BANKS 32
Huang Ying5854dbc2010-10-08 16:24:14 +080067#define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P)
Huang Ying890ca9a2009-05-11 16:48:15 +080068
Avi Kivity0f65dd72011-04-20 13:37:53 +030069#define emul_to_vcpu(ctxt) \
70 container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt)
71
Joerg Roedel50a37eb2008-01-31 14:57:38 +010072/* EFER defaults:
73 * - enable syscall per default because its emulated by KVM
74 * - enable LME and LMA per default on 64 bit KVM
75 */
76#ifdef CONFIG_X86_64
Lai Jiangshan1260edbe2011-02-21 11:51:35 +080077static
78u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA));
Joerg Roedel50a37eb2008-01-31 14:57:38 +010079#else
Lai Jiangshan1260edbe2011-02-21 11:51:35 +080080static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE);
Joerg Roedel50a37eb2008-01-31 14:57:38 +010081#endif
Carsten Otte313a3dc2007-10-11 19:16:52 +020082
Avi Kivityba1389b2007-11-18 16:24:12 +020083#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
84#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
Hollis Blanchard417bc302007-10-31 17:24:23 -050085
Gleb Natapovcb142eb2009-08-09 15:17:40 +030086static void update_cr8_intercept(struct kvm_vcpu *vcpu);
Avi Kivity7460fb4a2011-09-20 13:43:14 +030087static void process_nmi(struct kvm_vcpu *vcpu);
Avi Kivity674eea02008-02-11 18:37:23 +020088
Zhang Xiantao97896d02007-11-14 20:09:30 +080089struct kvm_x86_ops *kvm_x86_ops;
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030090EXPORT_SYMBOL_GPL(kvm_x86_ops);
Zhang Xiantao97896d02007-11-14 20:09:30 +080091
Rusty Russell476bc002012-01-13 09:32:18 +103092static bool ignore_msrs = 0;
93module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR);
Andre Przywaraed85c062009-06-25 12:36:49 +020094
Joerg Roedel92a1f122011-03-25 09:44:51 +010095bool kvm_has_tsc_control;
96EXPORT_SYMBOL_GPL(kvm_has_tsc_control);
97u32 kvm_max_guest_tsc_khz;
98EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz);
99
Zachary Amsdencc578282012-02-03 15:43:50 -0200100/* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */
101static u32 tsc_tolerance_ppm = 250;
102module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR);
103
Avi Kivity18863bd2009-09-07 11:12:18 +0300104#define KVM_NR_SHARED_MSRS 16
105
106struct kvm_shared_msrs_global {
107 int nr;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800108 u32 msrs[KVM_NR_SHARED_MSRS];
Avi Kivity18863bd2009-09-07 11:12:18 +0300109};
110
111struct kvm_shared_msrs {
112 struct user_return_notifier urn;
113 bool registered;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800114 struct kvm_shared_msr_values {
115 u64 host;
116 u64 curr;
117 } values[KVM_NR_SHARED_MSRS];
Avi Kivity18863bd2009-09-07 11:12:18 +0300118};
119
120static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
121static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
122
Hollis Blanchard417bc302007-10-31 17:24:23 -0500123struct kvm_stats_debugfs_item debugfs_entries[] = {
Avi Kivityba1389b2007-11-18 16:24:12 +0200124 { "pf_fixed", VCPU_STAT(pf_fixed) },
125 { "pf_guest", VCPU_STAT(pf_guest) },
126 { "tlb_flush", VCPU_STAT(tlb_flush) },
127 { "invlpg", VCPU_STAT(invlpg) },
128 { "exits", VCPU_STAT(exits) },
129 { "io_exits", VCPU_STAT(io_exits) },
130 { "mmio_exits", VCPU_STAT(mmio_exits) },
131 { "signal_exits", VCPU_STAT(signal_exits) },
132 { "irq_window", VCPU_STAT(irq_window_exits) },
Sheng Yangf08864b2008-05-15 18:23:25 +0800133 { "nmi_window", VCPU_STAT(nmi_window_exits) },
Avi Kivityba1389b2007-11-18 16:24:12 +0200134 { "halt_exits", VCPU_STAT(halt_exits) },
135 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
Amit Shahf11c3a82008-02-21 01:00:30 +0530136 { "hypercalls", VCPU_STAT(hypercalls) },
Avi Kivityba1389b2007-11-18 16:24:12 +0200137 { "request_irq", VCPU_STAT(request_irq_exits) },
138 { "irq_exits", VCPU_STAT(irq_exits) },
139 { "host_state_reload", VCPU_STAT(host_state_reload) },
140 { "efer_reload", VCPU_STAT(efer_reload) },
141 { "fpu_reload", VCPU_STAT(fpu_reload) },
142 { "insn_emulation", VCPU_STAT(insn_emulation) },
143 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
Avi Kivityfa89a812008-09-01 15:57:51 +0300144 { "irq_injections", VCPU_STAT(irq_injections) },
Jan Kiszkac4abb7c2008-09-26 09:30:55 +0200145 { "nmi_injections", VCPU_STAT(nmi_injections) },
Avi Kivity4cee5762007-11-18 16:37:07 +0200146 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
147 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
148 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
149 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
150 { "mmu_flooded", VM_STAT(mmu_flooded) },
151 { "mmu_recycled", VM_STAT(mmu_recycled) },
Avi Kivitydfc5aa02007-12-18 19:47:18 +0200152 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
Marcelo Tosatti4731d4c2008-09-23 13:18:39 -0300153 { "mmu_unsync", VM_STAT(mmu_unsync) },
Avi Kivity0f74a242007-11-20 23:01:14 +0200154 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
Marcelo Tosatti05da4552008-02-23 11:44:30 -0300155 { "largepages", VM_STAT(lpages) },
Hollis Blanchard417bc302007-10-31 17:24:23 -0500156 { NULL }
157};
158
Dexuan Cui2acf9232010-06-10 11:27:12 +0800159u64 __read_mostly host_xcr0;
160
Jan Kiszkab6785de2012-09-20 07:43:17 +0200161static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt);
Avi Kivityd6aa1002011-04-20 15:47:13 +0300162
Jan Kiszka8b6e4542012-09-20 07:43:08 +0200163static int kvm_vcpu_reset(struct kvm_vcpu *vcpu);
164
Gleb Natapovaf585b92010-10-14 11:22:46 +0200165static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu)
166{
167 int i;
168 for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++)
169 vcpu->arch.apf.gfns[i] = ~0;
170}
171
Avi Kivity18863bd2009-09-07 11:12:18 +0300172static void kvm_on_user_return(struct user_return_notifier *urn)
173{
174 unsigned slot;
Avi Kivity18863bd2009-09-07 11:12:18 +0300175 struct kvm_shared_msrs *locals
176 = container_of(urn, struct kvm_shared_msrs, urn);
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800177 struct kvm_shared_msr_values *values;
Avi Kivity18863bd2009-09-07 11:12:18 +0300178
179 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800180 values = &locals->values[slot];
181 if (values->host != values->curr) {
182 wrmsrl(shared_msrs_global.msrs[slot], values->host);
183 values->curr = values->host;
Avi Kivity18863bd2009-09-07 11:12:18 +0300184 }
185 }
186 locals->registered = false;
187 user_return_notifier_unregister(urn);
188}
189
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800190static void shared_msr_update(unsigned slot, u32 msr)
Avi Kivity18863bd2009-09-07 11:12:18 +0300191{
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800192 struct kvm_shared_msrs *smsr;
Avi Kivity18863bd2009-09-07 11:12:18 +0300193 u64 value;
194
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800195 smsr = &__get_cpu_var(shared_msrs);
196 /* only read, and nobody should modify it at this time,
197 * so don't need lock */
198 if (slot >= shared_msrs_global.nr) {
199 printk(KERN_ERR "kvm: invalid MSR slot!");
200 return;
201 }
202 rdmsrl_safe(msr, &value);
203 smsr->values[slot].host = value;
204 smsr->values[slot].curr = value;
205}
206
207void kvm_define_shared_msr(unsigned slot, u32 msr)
208{
Avi Kivity18863bd2009-09-07 11:12:18 +0300209 if (slot >= shared_msrs_global.nr)
210 shared_msrs_global.nr = slot + 1;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800211 shared_msrs_global.msrs[slot] = msr;
212 /* we need ensured the shared_msr_global have been updated */
213 smp_wmb();
Avi Kivity18863bd2009-09-07 11:12:18 +0300214}
215EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
216
217static void kvm_shared_msr_cpu_online(void)
218{
219 unsigned i;
Avi Kivity18863bd2009-09-07 11:12:18 +0300220
221 for (i = 0; i < shared_msrs_global.nr; ++i)
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800222 shared_msr_update(i, shared_msrs_global.msrs[i]);
Avi Kivity18863bd2009-09-07 11:12:18 +0300223}
224
Avi Kivityd5696722009-12-02 12:28:47 +0200225void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
Avi Kivity18863bd2009-09-07 11:12:18 +0300226{
227 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
228
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800229 if (((value ^ smsr->values[slot].curr) & mask) == 0)
Avi Kivity18863bd2009-09-07 11:12:18 +0300230 return;
Sheng Yang2bf78fa2009-12-18 16:48:44 +0800231 smsr->values[slot].curr = value;
232 wrmsrl(shared_msrs_global.msrs[slot], value);
Avi Kivity18863bd2009-09-07 11:12:18 +0300233 if (!smsr->registered) {
234 smsr->urn.on_user_return = kvm_on_user_return;
235 user_return_notifier_register(&smsr->urn);
236 smsr->registered = true;
237 }
238}
239EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
240
Avi Kivity3548bab2009-11-28 14:18:47 +0200241static void drop_user_return_notifiers(void *ignore)
242{
243 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
244
245 if (smsr->registered)
246 kvm_on_user_return(&smsr->urn);
247}
248
Carsten Otte6866b832007-10-29 16:09:10 +0100249u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
250{
Gleb Natapov8a5a87d2012-08-05 15:58:26 +0300251 return vcpu->arch.apic_base;
Carsten Otte6866b832007-10-29 16:09:10 +0100252}
253EXPORT_SYMBOL_GPL(kvm_get_apic_base);
254
255void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
256{
257 /* TODO: reserve bits check */
Gleb Natapov8a5a87d2012-08-05 15:58:26 +0300258 kvm_lapic_set_base(vcpu, data);
Carsten Otte6866b832007-10-29 16:09:10 +0100259}
260EXPORT_SYMBOL_GPL(kvm_set_apic_base);
261
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200262#define EXCPT_BENIGN 0
263#define EXCPT_CONTRIBUTORY 1
264#define EXCPT_PF 2
265
266static int exception_class(int vector)
267{
268 switch (vector) {
269 case PF_VECTOR:
270 return EXCPT_PF;
271 case DE_VECTOR:
272 case TS_VECTOR:
273 case NP_VECTOR:
274 case SS_VECTOR:
275 case GP_VECTOR:
276 return EXCPT_CONTRIBUTORY;
277 default:
278 break;
279 }
280 return EXCPT_BENIGN;
281}
282
283static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200284 unsigned nr, bool has_error, u32 error_code,
285 bool reinject)
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200286{
287 u32 prev_nr;
288 int class1, class2;
289
Avi Kivity3842d132010-07-27 12:30:24 +0300290 kvm_make_request(KVM_REQ_EVENT, vcpu);
291
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200292 if (!vcpu->arch.exception.pending) {
293 queue:
294 vcpu->arch.exception.pending = true;
295 vcpu->arch.exception.has_error_code = has_error;
296 vcpu->arch.exception.nr = nr;
297 vcpu->arch.exception.error_code = error_code;
Joerg Roedel3f0fd292010-05-05 16:04:41 +0200298 vcpu->arch.exception.reinject = reinject;
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200299 return;
300 }
301
302 /* to check exception */
303 prev_nr = vcpu->arch.exception.nr;
304 if (prev_nr == DF_VECTOR) {
305 /* triple fault -> shutdown */
Avi Kivitya8eeb042010-05-10 12:34:53 +0300306 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Eddie Dong3fd28fc2009-11-19 17:54:07 +0200307 return;
308 }
309 class1 = exception_class(prev_nr);
310 class2 = exception_class(nr);
311 if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY)
312 || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) {
313 /* generate double fault per SDM Table 5-5 */
314 vcpu->arch.exception.pending = true;
315 vcpu->arch.exception.has_error_code = true;
316 vcpu->arch.exception.nr = DF_VECTOR;
317 vcpu->arch.exception.error_code = 0;
318 } else
319 /* replace previous exception with a new one in a hope
320 that instruction re-execution will regenerate lost
321 exception */
322 goto queue;
323}
324
Avi Kivity298101d2007-11-25 13:41:11 +0200325void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
326{
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200327 kvm_multiple_exception(vcpu, nr, false, 0, false);
Avi Kivity298101d2007-11-25 13:41:11 +0200328}
329EXPORT_SYMBOL_GPL(kvm_queue_exception);
330
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200331void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr)
332{
333 kvm_multiple_exception(vcpu, nr, false, 0, true);
334}
335EXPORT_SYMBOL_GPL(kvm_requeue_exception);
336
Andre Przywaradb8fcef2010-12-21 11:12:01 +0100337void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err)
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200338{
Andre Przywaradb8fcef2010-12-21 11:12:01 +0100339 if (err)
340 kvm_inject_gp(vcpu, 0);
341 else
342 kvm_x86_ops->skip_emulated_instruction(vcpu);
343}
344EXPORT_SYMBOL_GPL(kvm_complete_insn_gp);
Joerg Roedel8df25a32010-09-10 17:30:46 +0200345
Avi Kivity6389ee92010-11-29 16:12:30 +0200346void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200347{
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200348 ++vcpu->stat.pf_guest;
Avi Kivity6389ee92010-11-29 16:12:30 +0200349 vcpu->arch.cr2 = fault->address;
350 kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code);
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200351}
Nadav Har'El27d6c862011-05-25 23:06:59 +0300352EXPORT_SYMBOL_GPL(kvm_inject_page_fault);
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200353
Avi Kivity6389ee92010-11-29 16:12:30 +0200354void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
Joerg Roedeld4f8cf62010-09-10 17:30:55 +0200355{
Avi Kivity6389ee92010-11-29 16:12:30 +0200356 if (mmu_is_nested(vcpu) && !fault->nested_page_fault)
357 vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault);
Joerg Roedeld4f8cf62010-09-10 17:30:55 +0200358 else
Avi Kivity6389ee92010-11-29 16:12:30 +0200359 vcpu->arch.mmu.inject_page_fault(vcpu, fault);
Joerg Roedeld4f8cf62010-09-10 17:30:55 +0200360}
361
Sheng Yang3419ffc2008-05-15 09:52:48 +0800362void kvm_inject_nmi(struct kvm_vcpu *vcpu)
363{
Avi Kivity7460fb4a2011-09-20 13:43:14 +0300364 atomic_inc(&vcpu->arch.nmi_queued);
365 kvm_make_request(KVM_REQ_NMI, vcpu);
Sheng Yang3419ffc2008-05-15 09:52:48 +0800366}
367EXPORT_SYMBOL_GPL(kvm_inject_nmi);
368
Avi Kivity298101d2007-11-25 13:41:11 +0200369void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
370{
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200371 kvm_multiple_exception(vcpu, nr, true, error_code, false);
Avi Kivity298101d2007-11-25 13:41:11 +0200372}
373EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
374
Joerg Roedelce7ddec2010-04-22 12:33:13 +0200375void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
376{
377 kvm_multiple_exception(vcpu, nr, true, error_code, true);
378}
379EXPORT_SYMBOL_GPL(kvm_requeue_exception_e);
380
Carsten Ottea03490e2007-10-29 16:09:35 +0100381/*
Avi Kivity0a79b002009-09-01 12:03:25 +0300382 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
383 * a #GP and return false.
384 */
385bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
Carsten Otte043405e2007-10-10 17:16:19 +0200386{
Avi Kivity0a79b002009-09-01 12:03:25 +0300387 if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl)
388 return true;
389 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
390 return false;
Carsten Ottea03490e2007-10-29 16:09:35 +0100391}
Avi Kivity0a79b002009-09-01 12:03:25 +0300392EXPORT_SYMBOL_GPL(kvm_require_cpl);
Carsten Ottea03490e2007-10-29 16:09:35 +0100393
394/*
Joerg Roedelec92fe42010-09-10 17:30:51 +0200395 * This function will be used to read from the physical memory of the currently
396 * running guest. The difference to kvm_read_guest_page is that this function
397 * can read from guest physical or from the guest's guest physical memory.
398 */
399int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
400 gfn_t ngfn, void *data, int offset, int len,
401 u32 access)
402{
403 gfn_t real_gfn;
404 gpa_t ngpa;
405
406 ngpa = gfn_to_gpa(ngfn);
407 real_gfn = mmu->translate_gpa(vcpu, ngpa, access);
408 if (real_gfn == UNMAPPED_GVA)
409 return -EFAULT;
410
411 real_gfn = gpa_to_gfn(real_gfn);
412
413 return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len);
414}
415EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu);
416
Joerg Roedel3d06b8b2010-09-10 17:30:53 +0200417int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn,
418 void *data, int offset, int len, u32 access)
419{
420 return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn,
421 data, offset, len, access);
422}
423
Joerg Roedelec92fe42010-09-10 17:30:51 +0200424/*
Carsten Ottea03490e2007-10-29 16:09:35 +0100425 * Load the pae pdptrs. Return true is they are all valid.
426 */
Joerg Roedelff03a072010-09-10 17:30:57 +0200427int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3)
Carsten Ottea03490e2007-10-29 16:09:35 +0100428{
429 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
430 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
431 int i;
432 int ret;
Joerg Roedelff03a072010-09-10 17:30:57 +0200433 u64 pdpte[ARRAY_SIZE(mmu->pdptrs)];
Carsten Ottea03490e2007-10-29 16:09:35 +0100434
Joerg Roedelff03a072010-09-10 17:30:57 +0200435 ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte,
436 offset * sizeof(u64), sizeof(pdpte),
437 PFERR_USER_MASK|PFERR_WRITE_MASK);
Carsten Ottea03490e2007-10-29 16:09:35 +0100438 if (ret < 0) {
439 ret = 0;
440 goto out;
441 }
442 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
Avi Kivity43a37952009-06-10 14:12:05 +0300443 if (is_present_gpte(pdpte[i]) &&
Dong, Eddie20c466b2009-03-31 23:03:45 +0800444 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
Carsten Ottea03490e2007-10-29 16:09:35 +0100445 ret = 0;
446 goto out;
447 }
448 }
449 ret = 1;
450
Joerg Roedelff03a072010-09-10 17:30:57 +0200451 memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs));
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300452 __set_bit(VCPU_EXREG_PDPTR,
453 (unsigned long *)&vcpu->arch.regs_avail);
454 __set_bit(VCPU_EXREG_PDPTR,
455 (unsigned long *)&vcpu->arch.regs_dirty);
Carsten Ottea03490e2007-10-29 16:09:35 +0100456out:
Carsten Ottea03490e2007-10-29 16:09:35 +0100457
458 return ret;
459}
Joerg Roedelcc4b6872008-02-07 13:47:43 +0100460EXPORT_SYMBOL_GPL(load_pdptrs);
Carsten Ottea03490e2007-10-29 16:09:35 +0100461
Avi Kivityd835dfe2007-11-21 02:57:59 +0200462static bool pdptrs_changed(struct kvm_vcpu *vcpu)
463{
Joerg Roedelff03a072010-09-10 17:30:57 +0200464 u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)];
Avi Kivityd835dfe2007-11-21 02:57:59 +0200465 bool changed = true;
Joerg Roedel3d06b8b2010-09-10 17:30:53 +0200466 int offset;
467 gfn_t gfn;
Avi Kivityd835dfe2007-11-21 02:57:59 +0200468 int r;
469
470 if (is_long_mode(vcpu) || !is_pae(vcpu))
471 return false;
472
Avi Kivity6de4f3a2009-05-31 22:58:47 +0300473 if (!test_bit(VCPU_EXREG_PDPTR,
474 (unsigned long *)&vcpu->arch.regs_avail))
475 return true;
476
Avi Kivity9f8fe502010-12-05 17:30:00 +0200477 gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT;
478 offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1);
Joerg Roedel3d06b8b2010-09-10 17:30:53 +0200479 r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte),
480 PFERR_USER_MASK | PFERR_WRITE_MASK);
Avi Kivityd835dfe2007-11-21 02:57:59 +0200481 if (r < 0)
482 goto out;
Joerg Roedelff03a072010-09-10 17:30:57 +0200483 changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0;
Avi Kivityd835dfe2007-11-21 02:57:59 +0200484out:
Avi Kivityd835dfe2007-11-21 02:57:59 +0200485
486 return changed;
487}
488
Avi Kivity49a9b072010-06-10 17:02:14 +0300489int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
Carsten Ottea03490e2007-10-29 16:09:35 +0100490{
Sheng Yangaad82702010-05-12 16:40:42 +0800491 unsigned long old_cr0 = kvm_read_cr0(vcpu);
492 unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
493 X86_CR0_CD | X86_CR0_NW;
494
Avi Kivityf9a48e62010-01-06 19:10:22 +0200495 cr0 |= X86_CR0_ET;
496
Gleb Natapovab344822010-01-21 15:28:46 +0200497#ifdef CONFIG_X86_64
Gleb Natapov0f122442010-04-28 19:15:31 +0300498 if (cr0 & 0xffffffff00000000UL)
499 return 1;
Gleb Natapovab344822010-01-21 15:28:46 +0200500#endif
501
502 cr0 &= ~CR0_RESERVED_BITS;
Carsten Ottea03490e2007-10-29 16:09:35 +0100503
Gleb Natapov0f122442010-04-28 19:15:31 +0300504 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD))
505 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100506
Gleb Natapov0f122442010-04-28 19:15:31 +0300507 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE))
508 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100509
510 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
511#ifdef CONFIG_X86_64
Avi Kivityf6801df2010-01-21 15:31:50 +0200512 if ((vcpu->arch.efer & EFER_LME)) {
Carsten Ottea03490e2007-10-29 16:09:35 +0100513 int cs_db, cs_l;
514
Gleb Natapov0f122442010-04-28 19:15:31 +0300515 if (!is_pae(vcpu))
516 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100517 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
Gleb Natapov0f122442010-04-28 19:15:31 +0300518 if (cs_l)
519 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100520 } else
521#endif
Joerg Roedelff03a072010-09-10 17:30:57 +0200522 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
Avi Kivity9f8fe502010-12-05 17:30:00 +0200523 kvm_read_cr3(vcpu)))
Gleb Natapov0f122442010-04-28 19:15:31 +0300524 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100525 }
526
Mao, Junjiead756a12012-07-02 01:18:48 +0000527 if (!(cr0 & X86_CR0_PG) && kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE))
528 return 1;
529
Carsten Ottea03490e2007-10-29 16:09:35 +0100530 kvm_x86_ops->set_cr0(vcpu, cr0);
Carsten Ottea03490e2007-10-29 16:09:35 +0100531
Lai Jiangshand170c412011-02-21 11:21:30 +0800532 if ((cr0 ^ old_cr0) & X86_CR0_PG) {
Xiao Guangronge5f3f022010-11-12 14:47:01 +0800533 kvm_clear_async_pf_completion_queue(vcpu);
Lai Jiangshand170c412011-02-21 11:21:30 +0800534 kvm_async_pf_hash_reset(vcpu);
535 }
Xiao Guangronge5f3f022010-11-12 14:47:01 +0800536
Sheng Yangaad82702010-05-12 16:40:42 +0800537 if ((cr0 ^ old_cr0) & update_bits)
538 kvm_mmu_reset_context(vcpu);
Gleb Natapov0f122442010-04-28 19:15:31 +0300539 return 0;
540}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200541EXPORT_SYMBOL_GPL(kvm_set_cr0);
Carsten Ottea03490e2007-10-29 16:09:35 +0100542
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200543void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
Carsten Ottea03490e2007-10-29 16:09:35 +0100544{
Avi Kivity49a9b072010-06-10 17:02:14 +0300545 (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f));
Carsten Ottea03490e2007-10-29 16:09:35 +0100546}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200547EXPORT_SYMBOL_GPL(kvm_lmsw);
Carsten Ottea03490e2007-10-29 16:09:35 +0100548
Dexuan Cui2acf9232010-06-10 11:27:12 +0800549int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
550{
551 u64 xcr0;
552
553 /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */
554 if (index != XCR_XFEATURE_ENABLED_MASK)
555 return 1;
556 xcr0 = xcr;
557 if (kvm_x86_ops->get_cpl(vcpu) != 0)
558 return 1;
559 if (!(xcr0 & XSTATE_FP))
560 return 1;
561 if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE))
562 return 1;
563 if (xcr0 & ~host_xcr0)
564 return 1;
565 vcpu->arch.xcr0 = xcr0;
566 vcpu->guest_xcr0_loaded = 0;
567 return 0;
568}
569
570int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
571{
572 if (__kvm_set_xcr(vcpu, index, xcr)) {
573 kvm_inject_gp(vcpu, 0);
574 return 1;
575 }
576 return 0;
577}
578EXPORT_SYMBOL_GPL(kvm_set_xcr);
579
Avi Kivitya83b29c2010-06-10 17:02:15 +0300580int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
Carsten Ottea03490e2007-10-29 16:09:35 +0100581{
Avi Kivityfc78f512009-12-07 12:16:48 +0200582 unsigned long old_cr4 = kvm_read_cr4(vcpu);
Yang, Wei Yc68b7342011-06-03 11:13:42 +0800583 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE |
584 X86_CR4_PAE | X86_CR4_SMEP;
Gleb Natapov0f122442010-04-28 19:15:31 +0300585 if (cr4 & CR4_RESERVED_BITS)
586 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100587
Dexuan Cui2acf9232010-06-10 11:27:12 +0800588 if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE))
589 return 1;
590
Yang, Wei Yc68b7342011-06-03 11:13:42 +0800591 if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP))
592 return 1;
593
Yang, Wei74dc2b42011-06-14 20:10:18 +0800594 if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_RDWRGSFS))
595 return 1;
596
Carsten Ottea03490e2007-10-29 16:09:35 +0100597 if (is_long_mode(vcpu)) {
Gleb Natapov0f122442010-04-28 19:15:31 +0300598 if (!(cr4 & X86_CR4_PAE))
599 return 1;
Avi Kivitya2edf572009-05-24 22:19:00 +0300600 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
601 && ((cr4 ^ old_cr4) & pdptr_bits)
Avi Kivity9f8fe502010-12-05 17:30:00 +0200602 && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
603 kvm_read_cr3(vcpu)))
Gleb Natapov0f122442010-04-28 19:15:31 +0300604 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100605
Mao, Junjiead756a12012-07-02 01:18:48 +0000606 if ((cr4 & X86_CR4_PCIDE) && !(old_cr4 & X86_CR4_PCIDE)) {
607 if (!guest_cpuid_has_pcid(vcpu))
608 return 1;
609
610 /* PCID can not be enabled when cr3[11:0]!=000H or EFER.LMA=0 */
611 if ((kvm_read_cr3(vcpu) & X86_CR3_PCID_MASK) || !is_long_mode(vcpu))
612 return 1;
613 }
614
Nadav Har'El5e1746d2011-05-25 23:03:24 +0300615 if (kvm_x86_ops->set_cr4(vcpu, cr4))
Gleb Natapov0f122442010-04-28 19:15:31 +0300616 return 1;
617
Mao, Junjiead756a12012-07-02 01:18:48 +0000618 if (((cr4 ^ old_cr4) & pdptr_bits) ||
619 (!(cr4 & X86_CR4_PCIDE) && (old_cr4 & X86_CR4_PCIDE)))
Sheng Yangaad82702010-05-12 16:40:42 +0800620 kvm_mmu_reset_context(vcpu);
Gleb Natapov0f122442010-04-28 19:15:31 +0300621
Dexuan Cui2acf9232010-06-10 11:27:12 +0800622 if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE)
Avi Kivity00b27a32011-11-23 16:30:32 +0200623 kvm_update_cpuid(vcpu);
Dexuan Cui2acf9232010-06-10 11:27:12 +0800624
Gleb Natapov0f122442010-04-28 19:15:31 +0300625 return 0;
626}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200627EXPORT_SYMBOL_GPL(kvm_set_cr4);
Carsten Ottea03490e2007-10-29 16:09:35 +0100628
Avi Kivity23902182010-06-10 17:02:16 +0300629int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
Carsten Ottea03490e2007-10-29 16:09:35 +0100630{
Avi Kivity9f8fe502010-12-05 17:30:00 +0200631 if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) {
Marcelo Tosatti0ba73cd2008-09-23 13:18:34 -0300632 kvm_mmu_sync_roots(vcpu);
Avi Kivityd835dfe2007-11-21 02:57:59 +0200633 kvm_mmu_flush_tlb(vcpu);
Gleb Natapov0f122442010-04-28 19:15:31 +0300634 return 0;
Avi Kivityd835dfe2007-11-21 02:57:59 +0200635 }
636
Carsten Ottea03490e2007-10-29 16:09:35 +0100637 if (is_long_mode(vcpu)) {
Gleb Natapov471842e2012-10-15 09:49:08 +0200638 if (kvm_read_cr4_bits(vcpu, X86_CR4_PCIDE)) {
Mao, Junjiead756a12012-07-02 01:18:48 +0000639 if (cr3 & CR3_PCID_ENABLED_RESERVED_BITS)
640 return 1;
641 } else
642 if (cr3 & CR3_L_MODE_RESERVED_BITS)
643 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100644 } else {
645 if (is_pae(vcpu)) {
Gleb Natapov0f122442010-04-28 19:15:31 +0300646 if (cr3 & CR3_PAE_RESERVED_BITS)
647 return 1;
Joerg Roedelff03a072010-09-10 17:30:57 +0200648 if (is_paging(vcpu) &&
649 !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3))
Gleb Natapov0f122442010-04-28 19:15:31 +0300650 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100651 }
652 /*
653 * We don't check reserved bits in nonpae mode, because
654 * this isn't enforced, and VMware depends on this.
655 */
656 }
657
Carsten Ottea03490e2007-10-29 16:09:35 +0100658 /*
659 * Does the new cr3 value map to physical memory? (Note, we
660 * catch an invalid cr3 even in real-mode, because it would
661 * cause trouble later on when we turn on paging anyway.)
662 *
663 * A real CPU would silently accept an invalid cr3 and would
664 * attempt to use it - with largely undefined (and often hard
665 * to debug) behavior on the guest side.
666 */
667 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
Gleb Natapov0f122442010-04-28 19:15:31 +0300668 return 1;
669 vcpu->arch.cr3 = cr3;
Avi Kivityaff48ba2010-12-05 18:56:11 +0200670 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
Gleb Natapov0f122442010-04-28 19:15:31 +0300671 vcpu->arch.mmu.new_cr3(vcpu);
672 return 0;
673}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200674EXPORT_SYMBOL_GPL(kvm_set_cr3);
Carsten Ottea03490e2007-10-29 16:09:35 +0100675
Andre Przywaraeea1cff2010-12-21 11:12:00 +0100676int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
Carsten Ottea03490e2007-10-29 16:09:35 +0100677{
Gleb Natapov0f122442010-04-28 19:15:31 +0300678 if (cr8 & CR8_RESERVED_BITS)
679 return 1;
Carsten Ottea03490e2007-10-29 16:09:35 +0100680 if (irqchip_in_kernel(vcpu->kvm))
681 kvm_lapic_set_tpr(vcpu, cr8);
682 else
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800683 vcpu->arch.cr8 = cr8;
Gleb Natapov0f122442010-04-28 19:15:31 +0300684 return 0;
685}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200686EXPORT_SYMBOL_GPL(kvm_set_cr8);
Carsten Ottea03490e2007-10-29 16:09:35 +0100687
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200688unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
Carsten Ottea03490e2007-10-29 16:09:35 +0100689{
690 if (irqchip_in_kernel(vcpu->kvm))
691 return kvm_lapic_get_cr8(vcpu);
692 else
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800693 return vcpu->arch.cr8;
Carsten Ottea03490e2007-10-29 16:09:35 +0100694}
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200695EXPORT_SYMBOL_GPL(kvm_get_cr8);
Carsten Ottea03490e2007-10-29 16:09:35 +0100696
Jan Kiszkac8639012012-09-21 05:42:55 +0200697static void kvm_update_dr7(struct kvm_vcpu *vcpu)
698{
699 unsigned long dr7;
700
701 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
702 dr7 = vcpu->arch.guest_debug_dr7;
703 else
704 dr7 = vcpu->arch.dr7;
705 kvm_x86_ops->set_dr7(vcpu, dr7);
706 vcpu->arch.switch_db_regs = (dr7 & DR7_BP_EN_MASK);
707}
708
Gleb Natapov338dbc92010-04-28 19:15:32 +0300709static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
Gleb Natapov020df072010-04-13 10:05:23 +0300710{
711 switch (dr) {
712 case 0 ... 3:
713 vcpu->arch.db[dr] = val;
714 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
715 vcpu->arch.eff_db[dr] = val;
716 break;
717 case 4:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300718 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
719 return 1; /* #UD */
Gleb Natapov020df072010-04-13 10:05:23 +0300720 /* fall through */
721 case 6:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300722 if (val & 0xffffffff00000000ULL)
723 return -1; /* #GP */
Gleb Natapov020df072010-04-13 10:05:23 +0300724 vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
725 break;
726 case 5:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300727 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
728 return 1; /* #UD */
Gleb Natapov020df072010-04-13 10:05:23 +0300729 /* fall through */
730 default: /* 7 */
Gleb Natapov338dbc92010-04-28 19:15:32 +0300731 if (val & 0xffffffff00000000ULL)
732 return -1; /* #GP */
Gleb Natapov020df072010-04-13 10:05:23 +0300733 vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
Jan Kiszkac8639012012-09-21 05:42:55 +0200734 kvm_update_dr7(vcpu);
Gleb Natapov020df072010-04-13 10:05:23 +0300735 break;
736 }
737
738 return 0;
739}
Gleb Natapov338dbc92010-04-28 19:15:32 +0300740
741int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
742{
743 int res;
744
745 res = __kvm_set_dr(vcpu, dr, val);
746 if (res > 0)
747 kvm_queue_exception(vcpu, UD_VECTOR);
748 else if (res < 0)
749 kvm_inject_gp(vcpu, 0);
750
751 return res;
752}
Gleb Natapov020df072010-04-13 10:05:23 +0300753EXPORT_SYMBOL_GPL(kvm_set_dr);
754
Gleb Natapov338dbc92010-04-28 19:15:32 +0300755static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
Gleb Natapov020df072010-04-13 10:05:23 +0300756{
757 switch (dr) {
758 case 0 ... 3:
759 *val = vcpu->arch.db[dr];
760 break;
761 case 4:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300762 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
Gleb Natapov020df072010-04-13 10:05:23 +0300763 return 1;
Gleb Natapov020df072010-04-13 10:05:23 +0300764 /* fall through */
765 case 6:
766 *val = vcpu->arch.dr6;
767 break;
768 case 5:
Gleb Natapov338dbc92010-04-28 19:15:32 +0300769 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
Gleb Natapov020df072010-04-13 10:05:23 +0300770 return 1;
Gleb Natapov020df072010-04-13 10:05:23 +0300771 /* fall through */
772 default: /* 7 */
773 *val = vcpu->arch.dr7;
774 break;
775 }
776
777 return 0;
778}
Gleb Natapov338dbc92010-04-28 19:15:32 +0300779
780int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
781{
782 if (_kvm_get_dr(vcpu, dr, val)) {
783 kvm_queue_exception(vcpu, UD_VECTOR);
784 return 1;
785 }
786 return 0;
787}
Gleb Natapov020df072010-04-13 10:05:23 +0300788EXPORT_SYMBOL_GPL(kvm_get_dr);
789
Avi Kivity022cd0e2011-11-10 14:57:23 +0200790bool kvm_rdpmc(struct kvm_vcpu *vcpu)
791{
792 u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX);
793 u64 data;
794 int err;
795
796 err = kvm_pmu_read_pmc(vcpu, ecx, &data);
797 if (err)
798 return err;
799 kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data);
800 kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32);
801 return err;
802}
803EXPORT_SYMBOL_GPL(kvm_rdpmc);
804
Carsten Otte043405e2007-10-10 17:16:19 +0200805/*
806 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
807 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
808 *
809 * This list is modified at module load time to reflect the
Glauber Costae3267cb2009-10-06 13:24:50 -0400810 * capabilities of the host cpu. This capabilities test skips MSRs that are
811 * kvm-specific. Those are put in the beginning of the list.
Carsten Otte043405e2007-10-10 17:16:19 +0200812 */
Glauber Costae3267cb2009-10-06 13:24:50 -0400813
Gleb Natapov439793d2012-08-01 17:01:42 +0300814#define KVM_SAVE_MSRS_BEGIN 10
Carsten Otte043405e2007-10-10 17:16:19 +0200815static u32 msrs_to_save[] = {
Glauber Costae3267cb2009-10-06 13:24:50 -0400816 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
Glauber Costa11c6bff2010-05-11 12:17:41 -0400817 MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
Gleb Natapov55cd8e52010-01-17 15:51:22 +0200818 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
Glauber Costac9aaa892011-07-11 15:28:14 -0400819 HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +0300820 MSR_KVM_PV_EOI_EN,
Carsten Otte043405e2007-10-10 17:16:19 +0200821 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
Brian Gerst8c065852010-07-17 09:03:26 -0400822 MSR_STAR,
Carsten Otte043405e2007-10-10 17:16:19 +0200823#ifdef CONFIG_X86_64
824 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
825#endif
Avi Kivitye90aa412010-09-01 10:23:35 +0300826 MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
Carsten Otte043405e2007-10-10 17:16:19 +0200827};
828
829static unsigned num_msrs_to_save;
830
Mathias Krausef1d24832012-08-30 01:30:18 +0200831static const u32 emulated_msrs[] = {
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +0800832 MSR_IA32_TSCDEADLINE,
Carsten Otte043405e2007-10-10 17:16:19 +0200833 MSR_IA32_MISC_ENABLE,
Avi Kivity908e75f2010-07-07 14:09:38 +0300834 MSR_IA32_MCG_STATUS,
835 MSR_IA32_MCG_CTL,
Carsten Otte043405e2007-10-10 17:16:19 +0200836};
837
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200838static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
Carsten Otte15c4a642007-10-30 18:44:17 +0100839{
Sheng Yangaad82702010-05-12 16:40:42 +0800840 u64 old_efer = vcpu->arch.efer;
841
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200842 if (efer & efer_reserved_bits)
843 return 1;
Carsten Otte15c4a642007-10-30 18:44:17 +0100844
845 if (is_paging(vcpu)
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200846 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME))
847 return 1;
Carsten Otte15c4a642007-10-30 18:44:17 +0100848
Alexander Graf1b2fd702009-02-02 16:23:51 +0100849 if (efer & EFER_FFXSR) {
850 struct kvm_cpuid_entry2 *feat;
851
852 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200853 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT)))
854 return 1;
Alexander Graf1b2fd702009-02-02 16:23:51 +0100855 }
856
Alexander Grafd8017472008-11-25 20:17:11 +0100857 if (efer & EFER_SVME) {
858 struct kvm_cpuid_entry2 *feat;
859
860 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200861 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM)))
862 return 1;
Alexander Grafd8017472008-11-25 20:17:11 +0100863 }
864
Carsten Otte15c4a642007-10-30 18:44:17 +0100865 efer &= ~EFER_LMA;
Avi Kivityf6801df2010-01-21 15:31:50 +0200866 efer |= vcpu->arch.efer & EFER_LMA;
Carsten Otte15c4a642007-10-30 18:44:17 +0100867
Sheng Yanga3d204e2010-05-12 16:40:40 +0800868 kvm_x86_ops->set_efer(vcpu, efer);
869
Avi Kivity9645bb562009-03-31 11:31:54 +0300870 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200871
Sheng Yangaad82702010-05-12 16:40:42 +0800872 /* Update reserved bits */
873 if ((efer ^ old_efer) & EFER_NX)
874 kvm_mmu_reset_context(vcpu);
875
Roedel, Joergb69e8ca2010-05-06 11:38:43 +0200876 return 0;
Carsten Otte15c4a642007-10-30 18:44:17 +0100877}
878
Joerg Roedelf2b4b7d2008-01-31 14:57:37 +0100879void kvm_enable_efer_bits(u64 mask)
880{
881 efer_reserved_bits &= ~mask;
882}
883EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
884
885
Carsten Otte15c4a642007-10-30 18:44:17 +0100886/*
887 * Writes msr value into into the appropriate "register".
888 * Returns 0 on success, non-0 otherwise.
889 * Assumes vcpu_load() was already called.
890 */
891int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
892{
893 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
894}
895
Carsten Otte313a3dc2007-10-11 19:16:52 +0200896/*
897 * Adapt set_msr() to msr_io()'s calling convention
898 */
899static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
900{
901 return kvm_set_msr(vcpu, index, *data);
902}
903
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200904static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
905{
Avi Kivity9ed3c442010-05-04 15:00:37 +0300906 int version;
907 int r;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200908 struct pvclock_wall_clock wc;
Jason Wang923de3c2010-01-27 19:13:49 +0800909 struct timespec boot;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200910
911 if (!wall_clock)
912 return;
913
Avi Kivity9ed3c442010-05-04 15:00:37 +0300914 r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version));
915 if (r)
916 return;
917
918 if (version & 1)
919 ++version; /* first time write, random junk */
920
921 ++version;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200922
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200923 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
924
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200925 /*
926 * The guest calculates current wall clock time by adding
Zachary Amsden34c238a2010-09-18 14:38:14 -1000927 * system time (updated by kvm_guest_time_update below) to the
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200928 * wall clock specified here. guest system time equals host
929 * system time for us, thus we must fill in host boot time here.
930 */
Jason Wang923de3c2010-01-27 19:13:49 +0800931 getboottime(&boot);
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200932
Bruce Rogers4b648662012-07-20 10:44:24 -0600933 if (kvm->arch.kvmclock_offset) {
934 struct timespec ts = ns_to_timespec(kvm->arch.kvmclock_offset);
935 boot = timespec_sub(boot, ts);
936 }
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200937 wc.sec = boot.tv_sec;
938 wc.nsec = boot.tv_nsec;
939 wc.version = version;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200940
941 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
942
943 version++;
944 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200945}
946
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200947static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
948{
949 uint32_t quotient, remainder;
950
951 /* Don't try to replace with do_div(), this one calculates
952 * "(dividend << 32) / divisor" */
953 __asm__ ( "divl %4"
954 : "=a" (quotient), "=d" (remainder)
955 : "0" (0), "1" (dividend), "r" (divisor) );
956 return quotient;
957}
958
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000959static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz,
960 s8 *pshift, u32 *pmultiplier)
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200961{
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000962 uint64_t scaled64;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200963 int32_t shift = 0;
964 uint64_t tps64;
965 uint32_t tps32;
966
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000967 tps64 = base_khz * 1000LL;
968 scaled64 = scaled_khz * 1000LL;
Jan Kiszka50933622010-09-26 13:00:53 +0200969 while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) {
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200970 tps64 >>= 1;
971 shift--;
972 }
973
974 tps32 = (uint32_t)tps64;
Jan Kiszka50933622010-09-26 13:00:53 +0200975 while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) {
976 if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000)
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000977 scaled64 >>= 1;
978 else
979 tps32 <<= 1;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200980 shift++;
981 }
982
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000983 *pshift = shift;
984 *pmultiplier = div_frac(scaled64, tps32);
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200985
Zachary Amsden5f4e3f82010-09-18 14:38:13 -1000986 pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n",
987 __func__, base_khz, scaled_khz, shift, *pmultiplier);
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200988}
989
Zachary Amsden759379d2010-08-19 22:07:25 -1000990static inline u64 get_kernel_ns(void)
991{
992 struct timespec ts;
993
994 WARN_ON(preemptible());
995 ktime_get_ts(&ts);
996 monotonic_to_bootbased(&ts);
997 return timespec_to_ns(&ts);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200998}
999
Gerd Hoffmannc8076602009-02-04 17:52:04 +01001000static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
Zachary Amsdenc2855452010-09-18 14:38:15 -10001001unsigned long max_tsc_khz;
Gerd Hoffmannc8076602009-02-04 17:52:04 +01001002
Joerg Roedel857e4092011-03-25 09:44:50 +01001003static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
Zachary Amsden759379d2010-08-19 22:07:25 -10001004{
Zachary Amsdencc578282012-02-03 15:43:50 -02001005 return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
1006 vcpu->arch.virtual_tsc_shift);
Zachary Amsden759379d2010-08-19 22:07:25 -10001007}
1008
Zachary Amsdencc578282012-02-03 15:43:50 -02001009static u32 adjust_tsc_khz(u32 khz, s32 ppm)
Zachary Amsdenc2855452010-09-18 14:38:15 -10001010{
Zachary Amsdencc578282012-02-03 15:43:50 -02001011 u64 v = (u64)khz * (1000000 + ppm);
1012 do_div(v, 1000000);
1013 return v;
1014}
1015
1016static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz)
1017{
1018 u32 thresh_lo, thresh_hi;
1019 int use_scaling = 0;
1020
Zachary Amsdenc2855452010-09-18 14:38:15 -10001021 /* Compute a scale to convert nanoseconds in TSC cycles */
1022 kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000,
Zachary Amsdencc578282012-02-03 15:43:50 -02001023 &vcpu->arch.virtual_tsc_shift,
1024 &vcpu->arch.virtual_tsc_mult);
1025 vcpu->arch.virtual_tsc_khz = this_tsc_khz;
1026
1027 /*
1028 * Compute the variation in TSC rate which is acceptable
1029 * within the range of tolerance and decide if the
1030 * rate being applied is within that bounds of the hardware
1031 * rate. If so, no scaling or compensation need be done.
1032 */
1033 thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm);
1034 thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm);
1035 if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) {
1036 pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi);
1037 use_scaling = 1;
1038 }
1039 kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling);
Zachary Amsdenc2855452010-09-18 14:38:15 -10001040}
1041
1042static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns)
1043{
Zachary Amsdene26101b2012-02-03 15:43:57 -02001044 u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.this_tsc_nsec,
Zachary Amsdencc578282012-02-03 15:43:50 -02001045 vcpu->arch.virtual_tsc_mult,
1046 vcpu->arch.virtual_tsc_shift);
Zachary Amsdene26101b2012-02-03 15:43:57 -02001047 tsc += vcpu->arch.this_tsc_write;
Zachary Amsdenc2855452010-09-18 14:38:15 -10001048 return tsc;
1049}
1050
Zachary Amsden99e3e302010-08-19 22:07:17 -10001051void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data)
1052{
1053 struct kvm *kvm = vcpu->kvm;
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001054 u64 offset, ns, elapsed;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001055 unsigned long flags;
Marcelo Tosatti02626b62012-03-08 18:46:57 -03001056 s64 usdiff;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001057
Jan Kiszka038f8c12011-02-04 10:49:11 +01001058 raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags);
Joerg Roedel857e4092011-03-25 09:44:50 +01001059 offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
Zachary Amsden759379d2010-08-19 22:07:25 -10001060 ns = get_kernel_ns();
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001061 elapsed = ns - kvm->arch.last_tsc_nsec;
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001062
1063 /* n.b - signed multiplication and division required */
Marcelo Tosatti02626b62012-03-08 18:46:57 -03001064 usdiff = data - kvm->arch.last_tsc_write;
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001065#ifdef CONFIG_X86_64
Marcelo Tosatti02626b62012-03-08 18:46:57 -03001066 usdiff = (usdiff * 1000) / vcpu->arch.virtual_tsc_khz;
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001067#else
1068 /* do_div() only does unsigned */
1069 asm("idivl %2; xor %%edx, %%edx"
Marcelo Tosatti02626b62012-03-08 18:46:57 -03001070 : "=A"(usdiff)
1071 : "A"(usdiff * 1000), "rm"(vcpu->arch.virtual_tsc_khz));
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001072#endif
Marcelo Tosatti02626b62012-03-08 18:46:57 -03001073 do_div(elapsed, 1000);
1074 usdiff -= elapsed;
1075 if (usdiff < 0)
1076 usdiff = -usdiff;
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001077
1078 /*
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001079 * Special case: TSC write with a small delta (1 second) of virtual
1080 * cycle time against real time is interpreted as an attempt to
1081 * synchronize the CPU.
1082 *
1083 * For a reliable TSC, we can match TSC offsets, and for an unstable
1084 * TSC, we add elapsed time in this computation. We could let the
1085 * compensation code attempt to catch up if we fall behind, but
1086 * it's better to try to match offsets from the beginning.
1087 */
Marcelo Tosatti02626b62012-03-08 18:46:57 -03001088 if (usdiff < USEC_PER_SEC &&
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001089 vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) {
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001090 if (!check_tsc_unstable()) {
Zachary Amsdene26101b2012-02-03 15:43:57 -02001091 offset = kvm->arch.cur_tsc_offset;
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001092 pr_debug("kvm: matched tsc offset for %llu\n", data);
1093 } else {
Joerg Roedel857e4092011-03-25 09:44:50 +01001094 u64 delta = nsec_to_cycles(vcpu, elapsed);
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001095 data += delta;
1096 offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
Zachary Amsden759379d2010-08-19 22:07:25 -10001097 pr_debug("kvm: adjusted tsc offset by %llu\n", delta);
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001098 }
Zachary Amsdene26101b2012-02-03 15:43:57 -02001099 } else {
1100 /*
1101 * We split periods of matched TSC writes into generations.
1102 * For each generation, we track the original measured
1103 * nanosecond time, offset, and write, so if TSCs are in
1104 * sync, we can match exact offset, and if not, we can match
Guo Chao4a969982012-06-28 15:17:27 +08001105 * exact software computation in compute_guest_tsc()
Zachary Amsdene26101b2012-02-03 15:43:57 -02001106 *
1107 * These values are tracked in kvm->arch.cur_xxx variables.
1108 */
1109 kvm->arch.cur_tsc_generation++;
1110 kvm->arch.cur_tsc_nsec = ns;
1111 kvm->arch.cur_tsc_write = data;
1112 kvm->arch.cur_tsc_offset = offset;
1113 pr_debug("kvm: new tsc generation %u, clock %llu\n",
1114 kvm->arch.cur_tsc_generation, data);
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001115 }
Zachary Amsdene26101b2012-02-03 15:43:57 -02001116
1117 /*
1118 * We also track th most recent recorded KHZ, write and time to
1119 * allow the matching interval to be extended at each write.
1120 */
Zachary Amsdenf38e0982010-08-19 22:07:20 -10001121 kvm->arch.last_tsc_nsec = ns;
1122 kvm->arch.last_tsc_write = data;
Zachary Amsden5d3cb0f62012-02-03 15:43:51 -02001123 kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz;
Zachary Amsden99e3e302010-08-19 22:07:17 -10001124
1125 /* Reset of TSC must disable overshoot protection below */
1126 vcpu->arch.hv_clock.tsc_timestamp = 0;
Zachary Amsdenb183aa52012-02-03 15:43:53 -02001127 vcpu->arch.last_guest_tsc = data;
Zachary Amsdene26101b2012-02-03 15:43:57 -02001128
1129 /* Keep track of which generation this VCPU has synchronized to */
1130 vcpu->arch.this_tsc_generation = kvm->arch.cur_tsc_generation;
1131 vcpu->arch.this_tsc_nsec = kvm->arch.cur_tsc_nsec;
1132 vcpu->arch.this_tsc_write = kvm->arch.cur_tsc_write;
1133
1134 kvm_x86_ops->write_tsc_offset(vcpu, offset);
1135 raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags);
Zachary Amsden99e3e302010-08-19 22:07:17 -10001136}
Zachary Amsdene26101b2012-02-03 15:43:57 -02001137
Zachary Amsden99e3e302010-08-19 22:07:17 -10001138EXPORT_SYMBOL_GPL(kvm_write_tsc);
1139
Zachary Amsden34c238a2010-09-18 14:38:14 -10001140static int kvm_guest_time_update(struct kvm_vcpu *v)
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001141{
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001142 unsigned long flags;
1143 struct kvm_vcpu_arch *vcpu = &v->arch;
1144 void *shared_kaddr;
Avi Kivity463656c2009-04-12 15:49:07 +03001145 unsigned long this_tsc_khz;
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001146 s64 kernel_ns, max_kernel_ns;
1147 u64 tsc_timestamp;
Marcelo Tosatti51d59c62012-08-03 15:57:49 -03001148 u8 pvclock_flags;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001149
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001150 /* Keep irq disabled to prevent changes to the clock */
1151 local_irq_save(flags);
Nadav Har'Eld5c17852011-08-02 15:54:20 +03001152 tsc_timestamp = kvm_x86_ops->read_l1_tsc(v);
Zachary Amsden759379d2010-08-19 22:07:25 -10001153 kernel_ns = get_kernel_ns();
Zachary Amsdencc578282012-02-03 15:43:50 -02001154 this_tsc_khz = __get_cpu_var(cpu_tsc_khz);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001155 if (unlikely(this_tsc_khz == 0)) {
Zachary Amsdenc2855452010-09-18 14:38:15 -10001156 local_irq_restore(flags);
Zachary Amsden34c238a2010-09-18 14:38:14 -10001157 kvm_make_request(KVM_REQ_CLOCK_UPDATE, v);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001158 return 1;
1159 }
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001160
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001161 /*
Zachary Amsdenc2855452010-09-18 14:38:15 -10001162 * We may have to catch up the TSC to match elapsed wall clock
1163 * time for two reasons, even if kvmclock is used.
1164 * 1) CPU could have been running below the maximum TSC rate
1165 * 2) Broken TSC compensation resets the base at each VCPU
1166 * entry to avoid unknown leaps of TSC even when running
1167 * again on the same CPU. This may cause apparent elapsed
1168 * time to disappear, and the guest to stand still or run
1169 * very slowly.
1170 */
1171 if (vcpu->tsc_catchup) {
1172 u64 tsc = compute_guest_tsc(v, kernel_ns);
1173 if (tsc > tsc_timestamp) {
Marcelo Tosattif1e2b262012-02-03 15:43:55 -02001174 adjust_tsc_offset_guest(v, tsc - tsc_timestamp);
Zachary Amsdenc2855452010-09-18 14:38:15 -10001175 tsc_timestamp = tsc;
1176 }
1177 }
1178
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001179 local_irq_restore(flags);
1180
Zachary Amsdenc2855452010-09-18 14:38:15 -10001181 if (!vcpu->time_page)
1182 return 0;
1183
1184 /*
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001185 * Time as measured by the TSC may go backwards when resetting the base
1186 * tsc_timestamp. The reason for this is that the TSC resolution is
1187 * higher than the resolution of the other clock scales. Thus, many
1188 * possible measurments of the TSC correspond to one measurement of any
1189 * other clock, and so a spread of values is possible. This is not a
1190 * problem for the computation of the nanosecond clock; with TSC rates
1191 * around 1GHZ, there can only be a few cycles which correspond to one
1192 * nanosecond value, and any path through this code will inevitably
1193 * take longer than that. However, with the kernel_ns value itself,
1194 * the precision may be much lower, down to HZ granularity. If the
1195 * first sampling of TSC against kernel_ns ends in the low part of the
1196 * range, and the second in the high end of the range, we can get:
1197 *
1198 * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new
1199 *
1200 * As the sampling errors potentially range in the thousands of cycles,
1201 * it is possible such a time value has already been observed by the
1202 * guest. To protect against this, we must compute the system time as
1203 * observed by the guest and ensure the new system time is greater.
1204 */
1205 max_kernel_ns = 0;
Zachary Amsdenb183aa52012-02-03 15:43:53 -02001206 if (vcpu->hv_clock.tsc_timestamp) {
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001207 max_kernel_ns = vcpu->last_guest_tsc -
1208 vcpu->hv_clock.tsc_timestamp;
1209 max_kernel_ns = pvclock_scale_delta(max_kernel_ns,
1210 vcpu->hv_clock.tsc_to_system_mul,
1211 vcpu->hv_clock.tsc_shift);
1212 max_kernel_ns += vcpu->last_kernel_ns;
1213 }
1214
Zachary Amsdene48672f2010-08-19 22:07:23 -10001215 if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) {
Zachary Amsden5f4e3f82010-09-18 14:38:13 -10001216 kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz,
1217 &vcpu->hv_clock.tsc_shift,
1218 &vcpu->hv_clock.tsc_to_system_mul);
Zachary Amsdene48672f2010-08-19 22:07:23 -10001219 vcpu->hw_tsc_khz = this_tsc_khz;
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001220 }
1221
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001222 if (max_kernel_ns > kernel_ns)
1223 kernel_ns = max_kernel_ns;
1224
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001225 /* With all the info we got, fill in the values */
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001226 vcpu->hv_clock.tsc_timestamp = tsc_timestamp;
Zachary Amsden759379d2010-08-19 22:07:25 -10001227 vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset;
Zachary Amsden1d5f0662010-08-19 22:07:30 -10001228 vcpu->last_kernel_ns = kernel_ns;
Zachary Amsden28e46392010-09-18 14:38:12 -10001229 vcpu->last_guest_tsc = tsc_timestamp;
Marcelo Tosatti51d59c62012-08-03 15:57:49 -03001230
1231 pvclock_flags = 0;
1232 if (vcpu->pvclock_set_guest_stopped_request) {
1233 pvclock_flags |= PVCLOCK_GUEST_STOPPED;
1234 vcpu->pvclock_set_guest_stopped_request = false;
1235 }
1236
1237 vcpu->hv_clock.flags = pvclock_flags;
Glauber Costa371bcf62010-05-11 12:17:46 -04001238
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001239 /*
1240 * The interface expects us to write an even number signaling that the
1241 * update is finished. Since the guest won't see the intermediate
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001242 * state, we just increase by 2 at the end.
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001243 */
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001244 vcpu->hv_clock.version += 2;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001245
Cong Wang8fd75e12011-11-25 23:14:17 +08001246 shared_kaddr = kmap_atomic(vcpu->time_page);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001247
1248 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +02001249 sizeof(vcpu->hv_clock));
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001250
Cong Wang8fd75e12011-11-25 23:14:17 +08001251 kunmap_atomic(shared_kaddr);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001252
1253 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10001254 return 0;
Gerd Hoffmannc8076602009-02-04 17:52:04 +01001255}
1256
Avi Kivity9ba075a2008-05-26 20:06:35 +03001257static bool msr_mtrr_valid(unsigned msr)
1258{
1259 switch (msr) {
1260 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
1261 case MSR_MTRRfix64K_00000:
1262 case MSR_MTRRfix16K_80000:
1263 case MSR_MTRRfix16K_A0000:
1264 case MSR_MTRRfix4K_C0000:
1265 case MSR_MTRRfix4K_C8000:
1266 case MSR_MTRRfix4K_D0000:
1267 case MSR_MTRRfix4K_D8000:
1268 case MSR_MTRRfix4K_E0000:
1269 case MSR_MTRRfix4K_E8000:
1270 case MSR_MTRRfix4K_F0000:
1271 case MSR_MTRRfix4K_F8000:
1272 case MSR_MTRRdefType:
1273 case MSR_IA32_CR_PAT:
1274 return true;
1275 case 0x2f8:
1276 return true;
1277 }
1278 return false;
1279}
1280
Marcelo Tosattid6289b92009-06-22 15:27:56 -03001281static bool valid_pat_type(unsigned t)
1282{
1283 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
1284}
1285
1286static bool valid_mtrr_type(unsigned t)
1287{
1288 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
1289}
1290
1291static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1292{
1293 int i;
1294
1295 if (!msr_mtrr_valid(msr))
1296 return false;
1297
1298 if (msr == MSR_IA32_CR_PAT) {
1299 for (i = 0; i < 8; i++)
1300 if (!valid_pat_type((data >> (i * 8)) & 0xff))
1301 return false;
1302 return true;
1303 } else if (msr == MSR_MTRRdefType) {
1304 if (data & ~0xcff)
1305 return false;
1306 return valid_mtrr_type(data & 0xff);
1307 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
1308 for (i = 0; i < 8 ; i++)
1309 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
1310 return false;
1311 return true;
1312 }
1313
1314 /* variable MTRRs */
1315 return valid_mtrr_type(data & 0xff);
1316}
1317
Avi Kivity9ba075a2008-05-26 20:06:35 +03001318static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1319{
Sheng Yang0bed3b52008-10-09 16:01:54 +08001320 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1321
Marcelo Tosattid6289b92009-06-22 15:27:56 -03001322 if (!mtrr_valid(vcpu, msr, data))
Avi Kivity9ba075a2008-05-26 20:06:35 +03001323 return 1;
1324
Sheng Yang0bed3b52008-10-09 16:01:54 +08001325 if (msr == MSR_MTRRdefType) {
1326 vcpu->arch.mtrr_state.def_type = data;
1327 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
1328 } else if (msr == MSR_MTRRfix64K_00000)
1329 p[0] = data;
1330 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1331 p[1 + msr - MSR_MTRRfix16K_80000] = data;
1332 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1333 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
1334 else if (msr == MSR_IA32_CR_PAT)
1335 vcpu->arch.pat = data;
1336 else { /* Variable MTRRs */
1337 int idx, is_mtrr_mask;
1338 u64 *pt;
1339
1340 idx = (msr - 0x200) / 2;
1341 is_mtrr_mask = msr - 0x200 - 2 * idx;
1342 if (!is_mtrr_mask)
1343 pt =
1344 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1345 else
1346 pt =
1347 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1348 *pt = data;
1349 }
1350
1351 kvm_mmu_reset_context(vcpu);
Avi Kivity9ba075a2008-05-26 20:06:35 +03001352 return 0;
1353}
Carsten Otte15c4a642007-10-30 18:44:17 +01001354
Huang Ying890ca9a2009-05-11 16:48:15 +08001355static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1356{
1357 u64 mcg_cap = vcpu->arch.mcg_cap;
1358 unsigned bank_num = mcg_cap & 0xff;
1359
1360 switch (msr) {
1361 case MSR_IA32_MCG_STATUS:
1362 vcpu->arch.mcg_status = data;
1363 break;
1364 case MSR_IA32_MCG_CTL:
1365 if (!(mcg_cap & MCG_CTL_P))
1366 return 1;
1367 if (data != 0 && data != ~(u64)0)
1368 return -1;
1369 vcpu->arch.mcg_ctl = data;
1370 break;
1371 default:
1372 if (msr >= MSR_IA32_MC0_CTL &&
1373 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1374 u32 offset = msr - MSR_IA32_MC0_CTL;
Andre Przywara114be422010-03-24 17:46:42 +01001375 /* only 0 or all 1s can be written to IA32_MCi_CTL
1376 * some Linux kernels though clear bit 10 in bank 4 to
1377 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
1378 * this to avoid an uncatched #GP in the guest
1379 */
Huang Ying890ca9a2009-05-11 16:48:15 +08001380 if ((offset & 0x3) == 0 &&
Andre Przywara114be422010-03-24 17:46:42 +01001381 data != 0 && (data | (1 << 10)) != ~(u64)0)
Huang Ying890ca9a2009-05-11 16:48:15 +08001382 return -1;
1383 vcpu->arch.mce_banks[offset] = data;
1384 break;
1385 }
1386 return 1;
1387 }
1388 return 0;
1389}
1390
Ed Swierkffde22a2009-10-15 15:21:43 -07001391static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
1392{
1393 struct kvm *kvm = vcpu->kvm;
1394 int lm = is_long_mode(vcpu);
1395 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
1396 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
1397 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
1398 : kvm->arch.xen_hvm_config.blob_size_32;
1399 u32 page_num = data & ~PAGE_MASK;
1400 u64 page_addr = data & PAGE_MASK;
1401 u8 *page;
1402 int r;
1403
1404 r = -E2BIG;
1405 if (page_num >= blob_size)
1406 goto out;
1407 r = -ENOMEM;
Sasha Levinff5c2c02011-12-04 19:36:29 +02001408 page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE);
1409 if (IS_ERR(page)) {
1410 r = PTR_ERR(page);
Ed Swierkffde22a2009-10-15 15:21:43 -07001411 goto out;
Sasha Levinff5c2c02011-12-04 19:36:29 +02001412 }
Ed Swierkffde22a2009-10-15 15:21:43 -07001413 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
1414 goto out_free;
1415 r = 0;
1416out_free:
1417 kfree(page);
1418out:
1419 return r;
1420}
1421
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001422static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
1423{
1424 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
1425}
1426
1427static bool kvm_hv_msr_partition_wide(u32 msr)
1428{
1429 bool r = false;
1430 switch (msr) {
1431 case HV_X64_MSR_GUEST_OS_ID:
1432 case HV_X64_MSR_HYPERCALL:
1433 r = true;
1434 break;
1435 }
1436
1437 return r;
1438}
1439
1440static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1441{
1442 struct kvm *kvm = vcpu->kvm;
1443
1444 switch (msr) {
1445 case HV_X64_MSR_GUEST_OS_ID:
1446 kvm->arch.hv_guest_os_id = data;
1447 /* setting guest os id to zero disables hypercall page */
1448 if (!kvm->arch.hv_guest_os_id)
1449 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
1450 break;
1451 case HV_X64_MSR_HYPERCALL: {
1452 u64 gfn;
1453 unsigned long addr;
1454 u8 instructions[4];
1455
1456 /* if guest os id is not set hypercall should remain disabled */
1457 if (!kvm->arch.hv_guest_os_id)
1458 break;
1459 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1460 kvm->arch.hv_hypercall = data;
1461 break;
1462 }
1463 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1464 addr = gfn_to_hva(kvm, gfn);
1465 if (kvm_is_error_hva(addr))
1466 return 1;
1467 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1468 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
Xiao Guangrong8b0cedf2011-05-15 23:22:04 +08001469 if (__copy_to_user((void __user *)addr, instructions, 4))
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001470 return 1;
1471 kvm->arch.hv_hypercall = data;
1472 break;
1473 }
1474 default:
Christoffer Dalla737f252012-06-03 21:17:48 +03001475 vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1476 "data 0x%llx\n", msr, data);
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001477 return 1;
1478 }
1479 return 0;
1480}
1481
1482static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1483{
Gleb Natapov10388a02010-01-17 15:51:23 +02001484 switch (msr) {
1485 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1486 unsigned long addr;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001487
Gleb Natapov10388a02010-01-17 15:51:23 +02001488 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1489 vcpu->arch.hv_vapic = data;
1490 break;
1491 }
1492 addr = gfn_to_hva(vcpu->kvm, data >>
1493 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1494 if (kvm_is_error_hva(addr))
1495 return 1;
Xiao Guangrong8b0cedf2011-05-15 23:22:04 +08001496 if (__clear_user((void __user *)addr, PAGE_SIZE))
Gleb Natapov10388a02010-01-17 15:51:23 +02001497 return 1;
1498 vcpu->arch.hv_vapic = data;
1499 break;
1500 }
1501 case HV_X64_MSR_EOI:
1502 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1503 case HV_X64_MSR_ICR:
1504 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1505 case HV_X64_MSR_TPR:
1506 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1507 default:
Christoffer Dalla737f252012-06-03 21:17:48 +03001508 vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1509 "data 0x%llx\n", msr, data);
Gleb Natapov10388a02010-01-17 15:51:23 +02001510 return 1;
1511 }
1512
1513 return 0;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001514}
1515
Gleb Natapov344d9582010-10-14 11:22:50 +02001516static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
1517{
1518 gpa_t gpa = data & ~0x3f;
1519
Guo Chao4a969982012-06-28 15:17:27 +08001520 /* Bits 2:5 are reserved, Should be zero */
Gleb Natapov6adba522010-10-14 11:22:55 +02001521 if (data & 0x3c)
Gleb Natapov344d9582010-10-14 11:22:50 +02001522 return 1;
1523
1524 vcpu->arch.apf.msr_val = data;
1525
1526 if (!(data & KVM_ASYNC_PF_ENABLED)) {
1527 kvm_clear_async_pf_completion_queue(vcpu);
1528 kvm_async_pf_hash_reset(vcpu);
1529 return 0;
1530 }
1531
1532 if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa))
1533 return 1;
1534
Gleb Natapov6adba522010-10-14 11:22:55 +02001535 vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS);
Gleb Natapov344d9582010-10-14 11:22:50 +02001536 kvm_async_pf_wakeup_all(vcpu);
1537 return 0;
1538}
1539
Glauber Costa12f9a482011-02-01 14:16:40 -05001540static void kvmclock_reset(struct kvm_vcpu *vcpu)
1541{
1542 if (vcpu->arch.time_page) {
1543 kvm_release_page_dirty(vcpu->arch.time_page);
1544 vcpu->arch.time_page = NULL;
1545 }
1546}
1547
Glauber Costac9aaa892011-07-11 15:28:14 -04001548static void accumulate_steal_time(struct kvm_vcpu *vcpu)
1549{
1550 u64 delta;
1551
1552 if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
1553 return;
1554
1555 delta = current->sched_info.run_delay - vcpu->arch.st.last_steal;
1556 vcpu->arch.st.last_steal = current->sched_info.run_delay;
1557 vcpu->arch.st.accum_steal = delta;
1558}
1559
1560static void record_steal_time(struct kvm_vcpu *vcpu)
1561{
1562 if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
1563 return;
1564
1565 if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
1566 &vcpu->arch.st.steal, sizeof(struct kvm_steal_time))))
1567 return;
1568
1569 vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal;
1570 vcpu->arch.st.steal.version += 2;
1571 vcpu->arch.st.accum_steal = 0;
1572
1573 kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
1574 &vcpu->arch.st.steal, sizeof(struct kvm_steal_time));
1575}
1576
Carsten Otte15c4a642007-10-30 18:44:17 +01001577int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1578{
Gleb Natapov57537852012-01-15 14:17:22 +02001579 bool pr = false;
1580
Carsten Otte15c4a642007-10-30 18:44:17 +01001581 switch (msr) {
Carsten Otte15c4a642007-10-30 18:44:17 +01001582 case MSR_EFER:
Roedel, Joergb69e8ca2010-05-06 11:38:43 +02001583 return set_efer(vcpu, data);
Andre Przywara8f1589d2009-06-24 12:44:33 +02001584 case MSR_K7_HWCR:
1585 data &= ~(u64)0x40; /* ignore flush filter disable */
Joerg Roedel82494022010-02-24 18:59:16 +01001586 data &= ~(u64)0x100; /* ignore ignne emulation enable */
Nicolae Mogoreanua223c312012-02-21 13:44:21 -08001587 data &= ~(u64)0x8; /* ignore TLB cache disable */
Andre Przywara8f1589d2009-06-24 12:44:33 +02001588 if (data != 0) {
Christoffer Dalla737f252012-06-03 21:17:48 +03001589 vcpu_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1590 data);
Andre Przywara8f1589d2009-06-24 12:44:33 +02001591 return 1;
1592 }
Carsten Otte15c4a642007-10-30 18:44:17 +01001593 break;
Andre Przywaraf7c6d142009-07-02 15:04:14 +02001594 case MSR_FAM10H_MMIO_CONF_BASE:
1595 if (data != 0) {
Christoffer Dalla737f252012-06-03 21:17:48 +03001596 vcpu_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1597 "0x%llx\n", data);
Andre Przywaraf7c6d142009-07-02 15:04:14 +02001598 return 1;
1599 }
Carsten Otte15c4a642007-10-30 18:44:17 +01001600 break;
Andre Przywarac323c0e2009-06-24 15:37:05 +02001601 case MSR_AMD64_NB_CFG:
Joerg Roedelc7ac6792008-02-11 20:28:27 +01001602 break;
Alexander Grafb5e2fec2008-07-22 08:00:45 +02001603 case MSR_IA32_DEBUGCTLMSR:
1604 if (!data) {
1605 /* We support the non-activated case already */
1606 break;
1607 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1608 /* Values other than LBR and BTF are vendor-specific,
1609 thus reserved and should throw a #GP */
1610 return 1;
1611 }
Christoffer Dalla737f252012-06-03 21:17:48 +03001612 vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1613 __func__, data);
Alexander Grafb5e2fec2008-07-22 08:00:45 +02001614 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001615 case MSR_IA32_UCODE_REV:
1616 case MSR_IA32_UCODE_WRITE:
Avi Kivity61a6bd62008-12-29 17:32:28 +02001617 case MSR_VM_HSAVE_PA:
Andre Przywara6098ca92009-07-03 16:00:14 +02001618 case MSR_AMD64_PATCH_LOADER:
Carsten Otte15c4a642007-10-30 18:44:17 +01001619 break;
Avi Kivity9ba075a2008-05-26 20:06:35 +03001620 case 0x200 ... 0x2ff:
1621 return set_msr_mtrr(vcpu, msr, data);
Carsten Otte15c4a642007-10-30 18:44:17 +01001622 case MSR_IA32_APICBASE:
1623 kvm_set_apic_base(vcpu, data);
1624 break;
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001625 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1626 return kvm_x2apic_msr_write(vcpu, msr, data);
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001627 case MSR_IA32_TSCDEADLINE:
1628 kvm_set_lapic_tscdeadline_msr(vcpu, data);
1629 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001630 case MSR_IA32_MISC_ENABLE:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001631 vcpu->arch.ia32_misc_enable_msr = data;
Carsten Otte15c4a642007-10-30 18:44:17 +01001632 break;
Glauber Costa11c6bff2010-05-11 12:17:41 -04001633 case MSR_KVM_WALL_CLOCK_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001634 case MSR_KVM_WALL_CLOCK:
1635 vcpu->kvm->arch.wall_clock = data;
1636 kvm_write_wall_clock(vcpu->kvm, data);
1637 break;
Glauber Costa11c6bff2010-05-11 12:17:41 -04001638 case MSR_KVM_SYSTEM_TIME_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001639 case MSR_KVM_SYSTEM_TIME: {
Glauber Costa12f9a482011-02-01 14:16:40 -05001640 kvmclock_reset(vcpu);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001641
1642 vcpu->arch.time = data;
Zachary Amsdenc2855452010-09-18 14:38:15 -10001643 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001644
1645 /* we verify if the enable bit is set... */
1646 if (!(data & 1))
1647 break;
1648
1649 /* ...but clean it before doing the actual write */
1650 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1651
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001652 vcpu->arch.time_page =
1653 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001654
Xiao Guangrong32cad842012-08-03 15:42:52 +08001655 if (is_error_page(vcpu->arch.time_page))
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001656 vcpu->arch.time_page = NULL;
Xiao Guangrong32cad842012-08-03 15:42:52 +08001657
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02001658 break;
1659 }
Gleb Natapov344d9582010-10-14 11:22:50 +02001660 case MSR_KVM_ASYNC_PF_EN:
1661 if (kvm_pv_enable_async_pf(vcpu, data))
1662 return 1;
1663 break;
Glauber Costac9aaa892011-07-11 15:28:14 -04001664 case MSR_KVM_STEAL_TIME:
1665
1666 if (unlikely(!sched_info_on()))
1667 return 1;
1668
1669 if (data & KVM_STEAL_RESERVED_MASK)
1670 return 1;
1671
1672 if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime,
1673 data & KVM_STEAL_VALID_BITS))
1674 return 1;
1675
1676 vcpu->arch.st.msr_val = data;
1677
1678 if (!(data & KVM_MSR_ENABLED))
1679 break;
1680
1681 vcpu->arch.st.last_steal = current->sched_info.run_delay;
1682
1683 preempt_disable();
1684 accumulate_steal_time(vcpu);
1685 preempt_enable();
1686
1687 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
1688
1689 break;
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03001690 case MSR_KVM_PV_EOI_EN:
1691 if (kvm_lapic_enable_pv_eoi(vcpu, data))
1692 return 1;
1693 break;
Glauber Costac9aaa892011-07-11 15:28:14 -04001694
Huang Ying890ca9a2009-05-11 16:48:15 +08001695 case MSR_IA32_MCG_CTL:
1696 case MSR_IA32_MCG_STATUS:
1697 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1698 return set_msr_mce(vcpu, msr, data);
Andre Przywara71db6022009-06-12 22:01:29 +02001699
1700 /* Performance counters are not protected by a CPUID bit,
1701 * so we should check all of them in the generic path for the sake of
1702 * cross vendor migration.
1703 * Writing a zero into the event select MSRs disables them,
1704 * which we perfectly emulate ;-). Any other value should be at least
1705 * reported, some guests depend on them.
1706 */
Andre Przywara71db6022009-06-12 22:01:29 +02001707 case MSR_K7_EVNTSEL0:
1708 case MSR_K7_EVNTSEL1:
1709 case MSR_K7_EVNTSEL2:
1710 case MSR_K7_EVNTSEL3:
1711 if (data != 0)
Christoffer Dalla737f252012-06-03 21:17:48 +03001712 vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1713 "0x%x data 0x%llx\n", msr, data);
Andre Przywara71db6022009-06-12 22:01:29 +02001714 break;
1715 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1716 * so we ignore writes to make it happy.
1717 */
Andre Przywara71db6022009-06-12 22:01:29 +02001718 case MSR_K7_PERFCTR0:
1719 case MSR_K7_PERFCTR1:
1720 case MSR_K7_PERFCTR2:
1721 case MSR_K7_PERFCTR3:
Christoffer Dalla737f252012-06-03 21:17:48 +03001722 vcpu_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1723 "0x%x data 0x%llx\n", msr, data);
Andre Przywara71db6022009-06-12 22:01:29 +02001724 break;
Gleb Natapov57537852012-01-15 14:17:22 +02001725 case MSR_P6_PERFCTR0:
1726 case MSR_P6_PERFCTR1:
1727 pr = true;
1728 case MSR_P6_EVNTSEL0:
1729 case MSR_P6_EVNTSEL1:
1730 if (kvm_pmu_msr(vcpu, msr))
1731 return kvm_pmu_set_msr(vcpu, msr, data);
1732
1733 if (pr || data != 0)
Christoffer Dalla737f252012-06-03 21:17:48 +03001734 vcpu_unimpl(vcpu, "disabled perfctr wrmsr: "
1735 "0x%x data 0x%llx\n", msr, data);
Gleb Natapov57537852012-01-15 14:17:22 +02001736 break;
Jes Sorensen84e0cef2010-09-01 11:42:04 +02001737 case MSR_K7_CLK_CTL:
1738 /*
1739 * Ignore all writes to this no longer documented MSR.
1740 * Writes are only relevant for old K7 processors,
1741 * all pre-dating SVM, but a recommended workaround from
Guo Chao4a969982012-06-28 15:17:27 +08001742 * AMD for these chips. It is possible to specify the
Jes Sorensen84e0cef2010-09-01 11:42:04 +02001743 * affected processor models on the command line, hence
1744 * the need to ignore the workaround.
1745 */
1746 break;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001747 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1748 if (kvm_hv_msr_partition_wide(msr)) {
1749 int r;
1750 mutex_lock(&vcpu->kvm->lock);
1751 r = set_msr_hyperv_pw(vcpu, msr, data);
1752 mutex_unlock(&vcpu->kvm->lock);
1753 return r;
1754 } else
1755 return set_msr_hyperv(vcpu, msr, data);
1756 break;
john cooper91c9c3e2011-01-21 00:21:00 -05001757 case MSR_IA32_BBL_CR_CTL3:
1758 /* Drop writes to this legacy MSR -- see rdmsr
1759 * counterpart for further detail.
1760 */
Christoffer Dalla737f252012-06-03 21:17:48 +03001761 vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data);
john cooper91c9c3e2011-01-21 00:21:00 -05001762 break;
Boris Ostrovsky2b036c62012-01-09 14:00:35 -05001763 case MSR_AMD64_OSVW_ID_LENGTH:
1764 if (!guest_cpuid_has_osvw(vcpu))
1765 return 1;
1766 vcpu->arch.osvw.length = data;
1767 break;
1768 case MSR_AMD64_OSVW_STATUS:
1769 if (!guest_cpuid_has_osvw(vcpu))
1770 return 1;
1771 vcpu->arch.osvw.status = data;
1772 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001773 default:
Ed Swierkffde22a2009-10-15 15:21:43 -07001774 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1775 return xen_hvm_config(vcpu, data);
Gleb Natapovf5132b02011-11-10 14:57:22 +02001776 if (kvm_pmu_msr(vcpu, msr))
1777 return kvm_pmu_set_msr(vcpu, msr, data);
Andre Przywaraed85c062009-06-25 12:36:49 +02001778 if (!ignore_msrs) {
Christoffer Dalla737f252012-06-03 21:17:48 +03001779 vcpu_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1780 msr, data);
Andre Przywaraed85c062009-06-25 12:36:49 +02001781 return 1;
1782 } else {
Christoffer Dalla737f252012-06-03 21:17:48 +03001783 vcpu_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1784 msr, data);
Andre Przywaraed85c062009-06-25 12:36:49 +02001785 break;
1786 }
Carsten Otte15c4a642007-10-30 18:44:17 +01001787 }
1788 return 0;
1789}
1790EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1791
1792
1793/*
1794 * Reads an msr value (of 'msr_index') into 'pdata'.
1795 * Returns 0 on success, non-0 otherwise.
1796 * Assumes vcpu_load() was already called.
1797 */
1798int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1799{
1800 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1801}
1802
Avi Kivity9ba075a2008-05-26 20:06:35 +03001803static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1804{
Sheng Yang0bed3b52008-10-09 16:01:54 +08001805 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1806
Avi Kivity9ba075a2008-05-26 20:06:35 +03001807 if (!msr_mtrr_valid(msr))
1808 return 1;
1809
Sheng Yang0bed3b52008-10-09 16:01:54 +08001810 if (msr == MSR_MTRRdefType)
1811 *pdata = vcpu->arch.mtrr_state.def_type +
1812 (vcpu->arch.mtrr_state.enabled << 10);
1813 else if (msr == MSR_MTRRfix64K_00000)
1814 *pdata = p[0];
1815 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1816 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1817 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1818 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1819 else if (msr == MSR_IA32_CR_PAT)
1820 *pdata = vcpu->arch.pat;
1821 else { /* Variable MTRRs */
1822 int idx, is_mtrr_mask;
1823 u64 *pt;
1824
1825 idx = (msr - 0x200) / 2;
1826 is_mtrr_mask = msr - 0x200 - 2 * idx;
1827 if (!is_mtrr_mask)
1828 pt =
1829 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1830 else
1831 pt =
1832 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1833 *pdata = *pt;
1834 }
1835
Avi Kivity9ba075a2008-05-26 20:06:35 +03001836 return 0;
1837}
1838
Huang Ying890ca9a2009-05-11 16:48:15 +08001839static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1840{
1841 u64 data;
1842 u64 mcg_cap = vcpu->arch.mcg_cap;
1843 unsigned bank_num = mcg_cap & 0xff;
1844
1845 switch (msr) {
1846 case MSR_IA32_P5_MC_ADDR:
1847 case MSR_IA32_P5_MC_TYPE:
1848 data = 0;
1849 break;
1850 case MSR_IA32_MCG_CAP:
1851 data = vcpu->arch.mcg_cap;
1852 break;
1853 case MSR_IA32_MCG_CTL:
1854 if (!(mcg_cap & MCG_CTL_P))
1855 return 1;
1856 data = vcpu->arch.mcg_ctl;
1857 break;
1858 case MSR_IA32_MCG_STATUS:
1859 data = vcpu->arch.mcg_status;
1860 break;
1861 default:
1862 if (msr >= MSR_IA32_MC0_CTL &&
1863 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1864 u32 offset = msr - MSR_IA32_MC0_CTL;
1865 data = vcpu->arch.mce_banks[offset];
1866 break;
1867 }
1868 return 1;
1869 }
1870 *pdata = data;
1871 return 0;
1872}
1873
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001874static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1875{
1876 u64 data = 0;
1877 struct kvm *kvm = vcpu->kvm;
1878
1879 switch (msr) {
1880 case HV_X64_MSR_GUEST_OS_ID:
1881 data = kvm->arch.hv_guest_os_id;
1882 break;
1883 case HV_X64_MSR_HYPERCALL:
1884 data = kvm->arch.hv_hypercall;
1885 break;
1886 default:
Christoffer Dalla737f252012-06-03 21:17:48 +03001887 vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001888 return 1;
1889 }
1890
1891 *pdata = data;
1892 return 0;
1893}
1894
1895static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1896{
1897 u64 data = 0;
1898
1899 switch (msr) {
1900 case HV_X64_MSR_VP_INDEX: {
1901 int r;
1902 struct kvm_vcpu *v;
1903 kvm_for_each_vcpu(r, v, vcpu->kvm)
1904 if (v == vcpu)
1905 data = r;
1906 break;
1907 }
Gleb Natapov10388a02010-01-17 15:51:23 +02001908 case HV_X64_MSR_EOI:
1909 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1910 case HV_X64_MSR_ICR:
1911 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1912 case HV_X64_MSR_TPR:
1913 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
Mike Waychison14fa67e2011-07-21 15:38:10 -07001914 case HV_X64_MSR_APIC_ASSIST_PAGE:
Mike Waychisond1613ad2011-07-23 00:31:45 -07001915 data = vcpu->arch.hv_vapic;
1916 break;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001917 default:
Christoffer Dalla737f252012-06-03 21:17:48 +03001918 vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
Gleb Natapov55cd8e52010-01-17 15:51:22 +02001919 return 1;
1920 }
1921 *pdata = data;
1922 return 0;
1923}
1924
Carsten Otte15c4a642007-10-30 18:44:17 +01001925int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1926{
1927 u64 data;
1928
1929 switch (msr) {
Carsten Otte15c4a642007-10-30 18:44:17 +01001930 case MSR_IA32_PLATFORM_ID:
Carsten Otte15c4a642007-10-30 18:44:17 +01001931 case MSR_IA32_EBL_CR_POWERON:
Alexander Grafb5e2fec2008-07-22 08:00:45 +02001932 case MSR_IA32_DEBUGCTLMSR:
1933 case MSR_IA32_LASTBRANCHFROMIP:
1934 case MSR_IA32_LASTBRANCHTOIP:
1935 case MSR_IA32_LASTINTFROMIP:
1936 case MSR_IA32_LASTINTTOIP:
Jaswinder Singh Rajput60af2ec2009-05-14 11:00:10 +05301937 case MSR_K8_SYSCFG:
1938 case MSR_K7_HWCR:
Avi Kivity61a6bd62008-12-29 17:32:28 +02001939 case MSR_VM_HSAVE_PA:
Amit Shah9e699622009-06-15 13:25:34 +05301940 case MSR_K7_EVNTSEL0:
Amit Shah1f3ee612009-06-30 16:24:28 +05301941 case MSR_K7_PERFCTR0:
Andre Przywara1fdbd482009-06-24 12:44:34 +02001942 case MSR_K8_INT_PENDING_MSG:
Andre Przywarac323c0e2009-06-24 15:37:05 +02001943 case MSR_AMD64_NB_CFG:
Andre Przywaraf7c6d142009-07-02 15:04:14 +02001944 case MSR_FAM10H_MMIO_CONF_BASE:
Carsten Otte15c4a642007-10-30 18:44:17 +01001945 data = 0;
1946 break;
Gleb Natapov57537852012-01-15 14:17:22 +02001947 case MSR_P6_PERFCTR0:
1948 case MSR_P6_PERFCTR1:
1949 case MSR_P6_EVNTSEL0:
1950 case MSR_P6_EVNTSEL1:
1951 if (kvm_pmu_msr(vcpu, msr))
1952 return kvm_pmu_get_msr(vcpu, msr, pdata);
1953 data = 0;
1954 break;
Marcelo Tosatti742bc672011-07-29 19:44:21 -03001955 case MSR_IA32_UCODE_REV:
1956 data = 0x100000000ULL;
1957 break;
Avi Kivity9ba075a2008-05-26 20:06:35 +03001958 case MSR_MTRRcap:
1959 data = 0x500 | KVM_NR_VAR_MTRR;
1960 break;
1961 case 0x200 ... 0x2ff:
1962 return get_msr_mtrr(vcpu, msr, pdata);
Carsten Otte15c4a642007-10-30 18:44:17 +01001963 case 0xcd: /* fsb frequency */
1964 data = 3;
1965 break;
Jes Sorensen7b914092010-09-09 12:06:46 +02001966 /*
1967 * MSR_EBC_FREQUENCY_ID
1968 * Conservative value valid for even the basic CPU models.
1969 * Models 0,1: 000 in bits 23:21 indicating a bus speed of
1970 * 100MHz, model 2 000 in bits 18:16 indicating 100MHz,
1971 * and 266MHz for model 3, or 4. Set Core Clock
1972 * Frequency to System Bus Frequency Ratio to 1 (bits
1973 * 31:24) even though these are only valid for CPU
1974 * models > 2, however guests may end up dividing or
1975 * multiplying by zero otherwise.
1976 */
1977 case MSR_EBC_FREQUENCY_ID:
1978 data = 1 << 24;
1979 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001980 case MSR_IA32_APICBASE:
1981 data = kvm_get_apic_base(vcpu);
1982 break;
Gleb Natapov0105d1a2009-07-05 17:39:36 +03001983 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1984 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1985 break;
Liu, Jinsonga3e06bb2011-09-22 16:55:52 +08001986 case MSR_IA32_TSCDEADLINE:
1987 data = kvm_get_lapic_tscdeadline_msr(vcpu);
1988 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001989 case MSR_IA32_MISC_ENABLE:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08001990 data = vcpu->arch.ia32_misc_enable_msr;
Carsten Otte15c4a642007-10-30 18:44:17 +01001991 break;
Alexander Graf847f0ad2008-02-21 12:11:01 +01001992 case MSR_IA32_PERF_STATUS:
1993 /* TSC increment by tick */
1994 data = 1000ULL;
1995 /* CPU multiplier */
1996 data |= (((uint64_t)4ULL) << 40);
1997 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01001998 case MSR_EFER:
Avi Kivityf6801df2010-01-21 15:31:50 +02001999 data = vcpu->arch.efer;
Carsten Otte15c4a642007-10-30 18:44:17 +01002000 break;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02002001 case MSR_KVM_WALL_CLOCK:
Glauber Costa11c6bff2010-05-11 12:17:41 -04002002 case MSR_KVM_WALL_CLOCK_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02002003 data = vcpu->kvm->arch.wall_clock;
2004 break;
2005 case MSR_KVM_SYSTEM_TIME:
Glauber Costa11c6bff2010-05-11 12:17:41 -04002006 case MSR_KVM_SYSTEM_TIME_NEW:
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -02002007 data = vcpu->arch.time;
2008 break;
Gleb Natapov344d9582010-10-14 11:22:50 +02002009 case MSR_KVM_ASYNC_PF_EN:
2010 data = vcpu->arch.apf.msr_val;
2011 break;
Glauber Costac9aaa892011-07-11 15:28:14 -04002012 case MSR_KVM_STEAL_TIME:
2013 data = vcpu->arch.st.msr_val;
2014 break;
Michael S. Tsirkin1d921282012-08-26 18:00:29 +03002015 case MSR_KVM_PV_EOI_EN:
2016 data = vcpu->arch.pv_eoi.msr_val;
2017 break;
Huang Ying890ca9a2009-05-11 16:48:15 +08002018 case MSR_IA32_P5_MC_ADDR:
2019 case MSR_IA32_P5_MC_TYPE:
2020 case MSR_IA32_MCG_CAP:
2021 case MSR_IA32_MCG_CTL:
2022 case MSR_IA32_MCG_STATUS:
2023 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
2024 return get_msr_mce(vcpu, msr, pdata);
Jes Sorensen84e0cef2010-09-01 11:42:04 +02002025 case MSR_K7_CLK_CTL:
2026 /*
2027 * Provide expected ramp-up count for K7. All other
2028 * are set to zero, indicating minimum divisors for
2029 * every field.
2030 *
2031 * This prevents guest kernels on AMD host with CPU
2032 * type 6, model 8 and higher from exploding due to
2033 * the rdmsr failing.
2034 */
2035 data = 0x20000000;
2036 break;
Gleb Natapov55cd8e52010-01-17 15:51:22 +02002037 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
2038 if (kvm_hv_msr_partition_wide(msr)) {
2039 int r;
2040 mutex_lock(&vcpu->kvm->lock);
2041 r = get_msr_hyperv_pw(vcpu, msr, pdata);
2042 mutex_unlock(&vcpu->kvm->lock);
2043 return r;
2044 } else
2045 return get_msr_hyperv(vcpu, msr, pdata);
2046 break;
john cooper91c9c3e2011-01-21 00:21:00 -05002047 case MSR_IA32_BBL_CR_CTL3:
2048 /* This legacy MSR exists but isn't fully documented in current
2049 * silicon. It is however accessed by winxp in very narrow
2050 * scenarios where it sets bit #19, itself documented as
2051 * a "reserved" bit. Best effort attempt to source coherent
2052 * read data here should the balance of the register be
2053 * interpreted by the guest:
2054 *
2055 * L2 cache control register 3: 64GB range, 256KB size,
2056 * enabled, latency 0x1, configured
2057 */
2058 data = 0xbe702111;
2059 break;
Boris Ostrovsky2b036c62012-01-09 14:00:35 -05002060 case MSR_AMD64_OSVW_ID_LENGTH:
2061 if (!guest_cpuid_has_osvw(vcpu))
2062 return 1;
2063 data = vcpu->arch.osvw.length;
2064 break;
2065 case MSR_AMD64_OSVW_STATUS:
2066 if (!guest_cpuid_has_osvw(vcpu))
2067 return 1;
2068 data = vcpu->arch.osvw.status;
2069 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01002070 default:
Gleb Natapovf5132b02011-11-10 14:57:22 +02002071 if (kvm_pmu_msr(vcpu, msr))
2072 return kvm_pmu_get_msr(vcpu, msr, pdata);
Andre Przywaraed85c062009-06-25 12:36:49 +02002073 if (!ignore_msrs) {
Christoffer Dalla737f252012-06-03 21:17:48 +03002074 vcpu_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
Andre Przywaraed85c062009-06-25 12:36:49 +02002075 return 1;
2076 } else {
Christoffer Dalla737f252012-06-03 21:17:48 +03002077 vcpu_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
Andre Przywaraed85c062009-06-25 12:36:49 +02002078 data = 0;
2079 }
2080 break;
Carsten Otte15c4a642007-10-30 18:44:17 +01002081 }
2082 *pdata = data;
2083 return 0;
2084}
2085EXPORT_SYMBOL_GPL(kvm_get_msr_common);
2086
Carsten Otte313a3dc2007-10-11 19:16:52 +02002087/*
2088 * Read or write a bunch of msrs. All parameters are kernel addresses.
2089 *
2090 * @return number of msrs set successfully.
2091 */
2092static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
2093 struct kvm_msr_entry *entries,
2094 int (*do_msr)(struct kvm_vcpu *vcpu,
2095 unsigned index, u64 *data))
2096{
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002097 int i, idx;
Carsten Otte313a3dc2007-10-11 19:16:52 +02002098
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002099 idx = srcu_read_lock(&vcpu->kvm->srcu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002100 for (i = 0; i < msrs->nmsrs; ++i)
2101 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2102 break;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02002103 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002104
Carsten Otte313a3dc2007-10-11 19:16:52 +02002105 return i;
2106}
2107
2108/*
2109 * Read or write a bunch of msrs. Parameters are user addresses.
2110 *
2111 * @return number of msrs set successfully.
2112 */
2113static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
2114 int (*do_msr)(struct kvm_vcpu *vcpu,
2115 unsigned index, u64 *data),
2116 int writeback)
2117{
2118 struct kvm_msrs msrs;
2119 struct kvm_msr_entry *entries;
2120 int r, n;
2121 unsigned size;
2122
2123 r = -EFAULT;
2124 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2125 goto out;
2126
2127 r = -E2BIG;
2128 if (msrs.nmsrs >= MAX_IO_MSRS)
2129 goto out;
2130
Carsten Otte313a3dc2007-10-11 19:16:52 +02002131 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
Sasha Levinff5c2c02011-12-04 19:36:29 +02002132 entries = memdup_user(user_msrs->entries, size);
2133 if (IS_ERR(entries)) {
2134 r = PTR_ERR(entries);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002135 goto out;
Sasha Levinff5c2c02011-12-04 19:36:29 +02002136 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02002137
2138 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
2139 if (r < 0)
2140 goto out_free;
2141
2142 r = -EFAULT;
2143 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2144 goto out_free;
2145
2146 r = n;
2147
2148out_free:
Avi Kivity7a73c022010-07-22 23:24:52 +03002149 kfree(entries);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002150out:
2151 return r;
2152}
2153
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002154int kvm_dev_ioctl_check_extension(long ext)
2155{
2156 int r;
2157
2158 switch (ext) {
2159 case KVM_CAP_IRQCHIP:
2160 case KVM_CAP_HLT:
2161 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002162 case KVM_CAP_SET_TSS_ADDR:
Dan Kenigsberg07716712007-11-21 17:10:04 +02002163 case KVM_CAP_EXT_CPUID:
Gerd Hoffmannc8076602009-02-04 17:52:04 +01002164 case KVM_CAP_CLOCKSOURCE:
Sheng Yang78376992008-01-28 05:10:22 +08002165 case KVM_CAP_PIT:
Marcelo Tosattia28e4f52008-02-22 12:21:36 -05002166 case KVM_CAP_NOP_IO_DELAY:
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03002167 case KVM_CAP_MP_STATE:
Avi Kivityed848622008-07-29 11:30:57 +03002168 case KVM_CAP_SYNC_MMU:
Lai Jiangshana355c852010-12-14 17:57:47 +08002169 case KVM_CAP_USER_NMI:
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02002170 case KVM_CAP_REINJECT_CONTROL:
Gleb Natapov49256632009-02-04 17:28:14 +02002171 case KVM_CAP_IRQ_INJECT_STATUS:
Sheng Yange56d5322009-03-12 21:45:39 +08002172 case KVM_CAP_ASSIGN_DEV_IRQ:
Gregory Haskins721eecbf2009-05-20 10:30:49 -04002173 case KVM_CAP_IRQFD:
Gregory Haskinsd34e6b12009-07-07 17:08:49 -04002174 case KVM_CAP_IOEVENTFD:
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02002175 case KVM_CAP_PIT2:
Beth Kone9f42752009-07-07 11:50:38 -04002176 case KVM_CAP_PIT_STATE2:
Sheng Yangb927a3c2009-07-21 10:42:48 +08002177 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
Ed Swierkffde22a2009-10-15 15:21:43 -07002178 case KVM_CAP_XEN_HVM:
Glauber Costaafbcf7a2009-10-16 15:28:36 -04002179 case KVM_CAP_ADJUST_CLOCK:
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002180 case KVM_CAP_VCPU_EVENTS:
Gleb Natapov55cd8e52010-01-17 15:51:22 +02002181 case KVM_CAP_HYPERV:
Gleb Natapov10388a02010-01-17 15:51:23 +02002182 case KVM_CAP_HYPERV_VAPIC:
Gleb Natapovc25bc162010-01-17 15:51:24 +02002183 case KVM_CAP_HYPERV_SPIN:
Zhai, Edwinab9f4ec2010-01-29 14:38:44 +08002184 case KVM_CAP_PCI_SEGMENT:
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002185 case KVM_CAP_DEBUGREGS:
Jan Kiszkad2be1652010-02-23 17:47:57 +01002186 case KVM_CAP_X86_ROBUST_SINGLESTEP:
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002187 case KVM_CAP_XSAVE:
Gleb Natapov344d9582010-10-14 11:22:50 +02002188 case KVM_CAP_ASYNC_PF:
Joerg Roedel92a1f122011-03-25 09:44:51 +01002189 case KVM_CAP_GET_TSC_KHZ:
Jan Kiszka07700a92012-02-28 14:19:54 +01002190 case KVM_CAP_PCI_2_3:
Eric B Munson1c0b28c2012-03-10 14:37:27 -05002191 case KVM_CAP_KVMCLOCK_CTRL:
Xiao Guangrong4d8b81a2012-08-21 11:02:51 +08002192 case KVM_CAP_READONLY_MEM:
Alex Williamson7a844282012-09-21 11:58:03 -06002193 case KVM_CAP_IRQFD_RESAMPLE:
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002194 r = 1;
2195 break;
Laurent Vivier542472b2008-05-30 16:05:55 +02002196 case KVM_CAP_COALESCED_MMIO:
2197 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
2198 break;
Avi Kivity774ead32007-12-26 13:57:04 +02002199 case KVM_CAP_VAPIC:
2200 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
2201 break;
Avi Kivityf7252302008-02-20 11:53:16 +02002202 case KVM_CAP_NR_VCPUS:
Sasha Levin8c3ba332011-07-18 17:17:15 +03002203 r = KVM_SOFT_MAX_VCPUS;
2204 break;
2205 case KVM_CAP_MAX_VCPUS:
Avi Kivityf7252302008-02-20 11:53:16 +02002206 r = KVM_MAX_VCPUS;
2207 break;
Avi Kivitya988b912008-02-20 11:59:20 +02002208 case KVM_CAP_NR_MEMSLOTS:
2209 r = KVM_MEMORY_SLOTS;
2210 break;
Marcelo Tosattia68a6a72009-10-01 19:28:39 -03002211 case KVM_CAP_PV_MMU: /* obsolete */
2212 r = 0;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05002213 break;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +03002214 case KVM_CAP_IOMMU:
Joerg Roedela1b60c12011-09-06 18:46:34 +02002215 r = iommu_present(&pci_bus_type);
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +03002216 break;
Huang Ying890ca9a2009-05-11 16:48:15 +08002217 case KVM_CAP_MCE:
2218 r = KVM_MAX_MCE_BANKS;
2219 break;
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002220 case KVM_CAP_XCRS:
2221 r = cpu_has_xsave;
2222 break;
Joerg Roedel92a1f122011-03-25 09:44:51 +01002223 case KVM_CAP_TSC_CONTROL:
2224 r = kvm_has_tsc_control;
2225 break;
Jan Kiszka4d25a0662011-12-21 12:28:29 +01002226 case KVM_CAP_TSC_DEADLINE_TIMER:
2227 r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER);
2228 break;
Zhang Xiantao018d00d2007-11-15 23:07:47 +08002229 default:
2230 r = 0;
2231 break;
2232 }
2233 return r;
2234
2235}
2236
Carsten Otte043405e2007-10-10 17:16:19 +02002237long kvm_arch_dev_ioctl(struct file *filp,
2238 unsigned int ioctl, unsigned long arg)
2239{
2240 void __user *argp = (void __user *)arg;
2241 long r;
2242
2243 switch (ioctl) {
2244 case KVM_GET_MSR_INDEX_LIST: {
2245 struct kvm_msr_list __user *user_msr_list = argp;
2246 struct kvm_msr_list msr_list;
2247 unsigned n;
2248
2249 r = -EFAULT;
2250 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
2251 goto out;
2252 n = msr_list.nmsrs;
2253 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
2254 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
2255 goto out;
2256 r = -E2BIG;
Jan Kiszkae125e7b2009-07-02 21:45:47 +02002257 if (n < msr_list.nmsrs)
Carsten Otte043405e2007-10-10 17:16:19 +02002258 goto out;
2259 r = -EFAULT;
2260 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
2261 num_msrs_to_save * sizeof(u32)))
2262 goto out;
Jan Kiszkae125e7b2009-07-02 21:45:47 +02002263 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
Carsten Otte043405e2007-10-10 17:16:19 +02002264 &emulated_msrs,
2265 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
2266 goto out;
2267 r = 0;
2268 break;
2269 }
Avi Kivity674eea02008-02-11 18:37:23 +02002270 case KVM_GET_SUPPORTED_CPUID: {
2271 struct kvm_cpuid2 __user *cpuid_arg = argp;
2272 struct kvm_cpuid2 cpuid;
2273
2274 r = -EFAULT;
2275 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2276 goto out;
2277 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
Amit Shah19355472009-01-14 16:56:00 +00002278 cpuid_arg->entries);
Avi Kivity674eea02008-02-11 18:37:23 +02002279 if (r)
2280 goto out;
2281
2282 r = -EFAULT;
2283 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2284 goto out;
2285 r = 0;
2286 break;
2287 }
Huang Ying890ca9a2009-05-11 16:48:15 +08002288 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
2289 u64 mce_cap;
2290
2291 mce_cap = KVM_MCE_CAP_SUPPORTED;
2292 r = -EFAULT;
2293 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
2294 goto out;
2295 r = 0;
2296 break;
2297 }
Carsten Otte043405e2007-10-10 17:16:19 +02002298 default:
2299 r = -EINVAL;
2300 }
2301out:
2302 return r;
2303}
2304
Sheng Yangf5f48ee2010-06-30 12:25:15 +08002305static void wbinvd_ipi(void *garbage)
2306{
2307 wbinvd();
2308}
2309
2310static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu)
2311{
2312 return vcpu->kvm->arch.iommu_domain &&
2313 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY);
2314}
2315
Carsten Otte313a3dc2007-10-11 19:16:52 +02002316void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2317{
Sheng Yangf5f48ee2010-06-30 12:25:15 +08002318 /* Address WBINVD may be executed by guest */
2319 if (need_emulate_wbinvd(vcpu)) {
2320 if (kvm_x86_ops->has_wbinvd_exit())
2321 cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
2322 else if (vcpu->cpu != -1 && vcpu->cpu != cpu)
2323 smp_call_function_single(vcpu->cpu,
2324 wbinvd_ipi, NULL, 1);
2325 }
2326
Carsten Otte313a3dc2007-10-11 19:16:52 +02002327 kvm_x86_ops->vcpu_load(vcpu, cpu);
Zachary Amsden0dd6a6e2012-02-03 15:43:56 -02002328
2329 /* Apply any externally detected TSC adjustments (due to suspend) */
2330 if (unlikely(vcpu->arch.tsc_offset_adjustment)) {
2331 adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment);
2332 vcpu->arch.tsc_offset_adjustment = 0;
2333 set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests);
2334 }
2335
Zachary Amsden48434c202010-08-19 22:07:24 -10002336 if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) {
Zachary Amsden6f526ec2012-02-03 15:43:54 -02002337 s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 :
2338 native_read_tsc() - vcpu->arch.last_host_tsc;
Zachary Amsdene48672f2010-08-19 22:07:23 -10002339 if (tsc_delta < 0)
2340 mark_tsc_unstable("KVM discovered backwards TSC");
Zachary Amsdenc2855452010-09-18 14:38:15 -10002341 if (check_tsc_unstable()) {
Zachary Amsdenb183aa52012-02-03 15:43:53 -02002342 u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu,
2343 vcpu->arch.last_guest_tsc);
2344 kvm_x86_ops->write_tsc_offset(vcpu, offset);
Zachary Amsdenc2855452010-09-18 14:38:15 -10002345 vcpu->arch.tsc_catchup = 1;
Zachary Amsdenc2855452010-09-18 14:38:15 -10002346 }
Nikola Ciprich1aa8cee2011-03-09 23:36:51 +01002347 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Zachary Amsdenc2855452010-09-18 14:38:15 -10002348 if (vcpu->cpu != cpu)
2349 kvm_migrate_timers(vcpu);
Zachary Amsdene48672f2010-08-19 22:07:23 -10002350 vcpu->cpu = cpu;
Zachary Amsden6b7d7e72009-10-09 16:26:08 -10002351 }
Glauber Costac9aaa892011-07-11 15:28:14 -04002352
2353 accumulate_steal_time(vcpu);
2354 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002355}
2356
2357void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2358{
Avi Kivity02daab22009-12-30 12:40:26 +02002359 kvm_x86_ops->vcpu_put(vcpu);
Avi Kivity1c11e712010-05-03 16:05:44 +03002360 kvm_put_guest_fpu(vcpu);
Zachary Amsden6f526ec2012-02-03 15:43:54 -02002361 vcpu->arch.last_host_tsc = native_read_tsc();
Carsten Otte313a3dc2007-10-11 19:16:52 +02002362}
2363
Carsten Otte313a3dc2007-10-11 19:16:52 +02002364static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2365 struct kvm_lapic_state *s)
2366{
Zhang Xiantaoad312c72007-12-13 23:50:52 +08002367 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002368
2369 return 0;
2370}
2371
2372static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2373 struct kvm_lapic_state *s)
2374{
Gleb Natapov64eb0622012-08-08 15:24:36 +03002375 kvm_apic_post_state_restore(vcpu, s);
Gleb Natapovcb142eb2009-08-09 15:17:40 +03002376 update_cr8_intercept(vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002377
2378 return 0;
2379}
2380
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002381static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2382 struct kvm_interrupt *irq)
2383{
Michael S. Tsirkina50abc32012-09-05 20:00:52 +03002384 if (irq->irq < 0 || irq->irq >= KVM_NR_INTERRUPTS)
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002385 return -EINVAL;
2386 if (irqchip_in_kernel(vcpu->kvm))
2387 return -ENXIO;
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002388
Gleb Natapov66fd3f72009-05-11 13:35:50 +03002389 kvm_queue_interrupt(vcpu, irq->irq, false);
Avi Kivity3842d132010-07-27 12:30:24 +03002390 kvm_make_request(KVM_REQ_EVENT, vcpu);
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002391
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002392 return 0;
2393}
2394
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002395static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
2396{
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002397 kvm_inject_nmi(vcpu);
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002398
2399 return 0;
2400}
2401
Avi Kivityb209749f2007-10-22 16:50:39 +02002402static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
2403 struct kvm_tpr_access_ctl *tac)
2404{
2405 if (tac->flags)
2406 return -EINVAL;
2407 vcpu->arch.tpr_access_reporting = !!tac->enabled;
2408 return 0;
2409}
2410
Huang Ying890ca9a2009-05-11 16:48:15 +08002411static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
2412 u64 mcg_cap)
2413{
2414 int r;
2415 unsigned bank_num = mcg_cap & 0xff, bank;
2416
2417 r = -EINVAL;
Jan Kiszkaa9e38c3e2009-10-23 09:37:00 +02002418 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
Huang Ying890ca9a2009-05-11 16:48:15 +08002419 goto out;
2420 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2421 goto out;
2422 r = 0;
2423 vcpu->arch.mcg_cap = mcg_cap;
2424 /* Init IA32_MCG_CTL to all 1s */
2425 if (mcg_cap & MCG_CTL_P)
2426 vcpu->arch.mcg_ctl = ~(u64)0;
2427 /* Init IA32_MCi_CTL to all 1s */
2428 for (bank = 0; bank < bank_num; bank++)
2429 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2430out:
2431 return r;
2432}
2433
2434static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2435 struct kvm_x86_mce *mce)
2436{
2437 u64 mcg_cap = vcpu->arch.mcg_cap;
2438 unsigned bank_num = mcg_cap & 0xff;
2439 u64 *banks = vcpu->arch.mce_banks;
2440
2441 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2442 return -EINVAL;
2443 /*
2444 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2445 * reporting is disabled
2446 */
2447 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2448 vcpu->arch.mcg_ctl != ~(u64)0)
2449 return 0;
2450 banks += 4 * mce->bank;
2451 /*
2452 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2453 * reporting is disabled for the bank
2454 */
2455 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2456 return 0;
2457 if (mce->status & MCI_STATUS_UC) {
2458 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
Avi Kivityfc78f512009-12-07 12:16:48 +02002459 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
Avi Kivitya8eeb042010-05-10 12:34:53 +03002460 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
Huang Ying890ca9a2009-05-11 16:48:15 +08002461 return 0;
2462 }
2463 if (banks[1] & MCI_STATUS_VAL)
2464 mce->status |= MCI_STATUS_OVER;
2465 banks[2] = mce->addr;
2466 banks[3] = mce->misc;
2467 vcpu->arch.mcg_status = mce->mcg_status;
2468 banks[1] = mce->status;
2469 kvm_queue_exception(vcpu, MC_VECTOR);
2470 } else if (!(banks[1] & MCI_STATUS_VAL)
2471 || !(banks[1] & MCI_STATUS_UC)) {
2472 if (banks[1] & MCI_STATUS_VAL)
2473 mce->status |= MCI_STATUS_OVER;
2474 banks[2] = mce->addr;
2475 banks[3] = mce->misc;
2476 banks[1] = mce->status;
2477 } else
2478 banks[1] |= MCI_STATUS_OVER;
2479 return 0;
2480}
2481
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002482static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2483 struct kvm_vcpu_events *events)
2484{
Avi Kivity7460fb4a2011-09-20 13:43:14 +03002485 process_nmi(vcpu);
Jan Kiszka03b82a32010-02-15 10:45:41 +01002486 events->exception.injected =
2487 vcpu->arch.exception.pending &&
2488 !kvm_exception_is_soft(vcpu->arch.exception.nr);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002489 events->exception.nr = vcpu->arch.exception.nr;
2490 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002491 events->exception.pad = 0;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002492 events->exception.error_code = vcpu->arch.exception.error_code;
2493
Jan Kiszka03b82a32010-02-15 10:45:41 +01002494 events->interrupt.injected =
2495 vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002496 events->interrupt.nr = vcpu->arch.interrupt.nr;
Jan Kiszka03b82a32010-02-15 10:45:41 +01002497 events->interrupt.soft = 0;
Jan Kiszka48005f62010-02-19 19:38:07 +01002498 events->interrupt.shadow =
2499 kvm_x86_ops->get_interrupt_shadow(vcpu,
2500 KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002501
2502 events->nmi.injected = vcpu->arch.nmi_injected;
Avi Kivity7460fb4a2011-09-20 13:43:14 +03002503 events->nmi.pending = vcpu->arch.nmi_pending != 0;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002504 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002505 events->nmi.pad = 0;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002506
2507 events->sipi_vector = vcpu->arch.sipi_vector;
2508
Jan Kiszkadab4b912009-12-06 18:24:15 +01002509 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
Jan Kiszka48005f62010-02-19 19:38:07 +01002510 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2511 | KVM_VCPUEVENT_VALID_SHADOW);
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002512 memset(&events->reserved, 0, sizeof(events->reserved));
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002513}
2514
2515static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2516 struct kvm_vcpu_events *events)
2517{
Jan Kiszkadab4b912009-12-06 18:24:15 +01002518 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
Jan Kiszka48005f62010-02-19 19:38:07 +01002519 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2520 | KVM_VCPUEVENT_VALID_SHADOW))
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002521 return -EINVAL;
2522
Avi Kivity7460fb4a2011-09-20 13:43:14 +03002523 process_nmi(vcpu);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002524 vcpu->arch.exception.pending = events->exception.injected;
2525 vcpu->arch.exception.nr = events->exception.nr;
2526 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2527 vcpu->arch.exception.error_code = events->exception.error_code;
2528
2529 vcpu->arch.interrupt.pending = events->interrupt.injected;
2530 vcpu->arch.interrupt.nr = events->interrupt.nr;
2531 vcpu->arch.interrupt.soft = events->interrupt.soft;
Jan Kiszka48005f62010-02-19 19:38:07 +01002532 if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
2533 kvm_x86_ops->set_interrupt_shadow(vcpu,
2534 events->interrupt.shadow);
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002535
2536 vcpu->arch.nmi_injected = events->nmi.injected;
Jan Kiszkadab4b912009-12-06 18:24:15 +01002537 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2538 vcpu->arch.nmi_pending = events->nmi.pending;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002539 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2540
Jan Kiszkadab4b912009-12-06 18:24:15 +01002541 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2542 vcpu->arch.sipi_vector = events->sipi_vector;
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002543
Avi Kivity3842d132010-07-27 12:30:24 +03002544 kvm_make_request(KVM_REQ_EVENT, vcpu);
2545
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002546 return 0;
2547}
2548
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002549static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
2550 struct kvm_debugregs *dbgregs)
2551{
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002552 memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
2553 dbgregs->dr6 = vcpu->arch.dr6;
2554 dbgregs->dr7 = vcpu->arch.dr7;
2555 dbgregs->flags = 0;
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04002556 memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved));
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002557}
2558
2559static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
2560 struct kvm_debugregs *dbgregs)
2561{
2562 if (dbgregs->flags)
2563 return -EINVAL;
2564
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002565 memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
2566 vcpu->arch.dr6 = dbgregs->dr6;
2567 vcpu->arch.dr7 = dbgregs->dr7;
2568
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002569 return 0;
2570}
2571
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002572static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu,
2573 struct kvm_xsave *guest_xsave)
2574{
2575 if (cpu_has_xsave)
2576 memcpy(guest_xsave->region,
2577 &vcpu->arch.guest_fpu.state->xsave,
Xiaotian Fengf45755b2010-08-13 15:19:11 +08002578 xstate_size);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002579 else {
2580 memcpy(guest_xsave->region,
2581 &vcpu->arch.guest_fpu.state->fxsave,
2582 sizeof(struct i387_fxsave_struct));
2583 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] =
2584 XSTATE_FPSSE;
2585 }
2586}
2587
2588static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu,
2589 struct kvm_xsave *guest_xsave)
2590{
2591 u64 xstate_bv =
2592 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)];
2593
2594 if (cpu_has_xsave)
2595 memcpy(&vcpu->arch.guest_fpu.state->xsave,
Xiaotian Fengf45755b2010-08-13 15:19:11 +08002596 guest_xsave->region, xstate_size);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002597 else {
2598 if (xstate_bv & ~XSTATE_FPSSE)
2599 return -EINVAL;
2600 memcpy(&vcpu->arch.guest_fpu.state->fxsave,
2601 guest_xsave->region, sizeof(struct i387_fxsave_struct));
2602 }
2603 return 0;
2604}
2605
2606static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu,
2607 struct kvm_xcrs *guest_xcrs)
2608{
2609 if (!cpu_has_xsave) {
2610 guest_xcrs->nr_xcrs = 0;
2611 return;
2612 }
2613
2614 guest_xcrs->nr_xcrs = 1;
2615 guest_xcrs->flags = 0;
2616 guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK;
2617 guest_xcrs->xcrs[0].value = vcpu->arch.xcr0;
2618}
2619
2620static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu,
2621 struct kvm_xcrs *guest_xcrs)
2622{
2623 int i, r = 0;
2624
2625 if (!cpu_has_xsave)
2626 return -EINVAL;
2627
2628 if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags)
2629 return -EINVAL;
2630
2631 for (i = 0; i < guest_xcrs->nr_xcrs; i++)
2632 /* Only support XCR0 currently */
2633 if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) {
2634 r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK,
2635 guest_xcrs->xcrs[0].value);
2636 break;
2637 }
2638 if (r)
2639 r = -EINVAL;
2640 return r;
2641}
2642
Eric B Munson1c0b28c2012-03-10 14:37:27 -05002643/*
2644 * kvm_set_guest_paused() indicates to the guest kernel that it has been
2645 * stopped by the hypervisor. This function will be called from the host only.
2646 * EINVAL is returned when the host attempts to set the flag for a guest that
2647 * does not support pv clocks.
2648 */
2649static int kvm_set_guest_paused(struct kvm_vcpu *vcpu)
2650{
Eric B Munson1c0b28c2012-03-10 14:37:27 -05002651 if (!vcpu->arch.time_page)
2652 return -EINVAL;
Marcelo Tosatti51d59c62012-08-03 15:57:49 -03002653 vcpu->arch.pvclock_set_guest_stopped_request = true;
Eric B Munson1c0b28c2012-03-10 14:37:27 -05002654 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
2655 return 0;
2656}
2657
Carsten Otte313a3dc2007-10-11 19:16:52 +02002658long kvm_arch_vcpu_ioctl(struct file *filp,
2659 unsigned int ioctl, unsigned long arg)
2660{
2661 struct kvm_vcpu *vcpu = filp->private_data;
2662 void __user *argp = (void __user *)arg;
2663 int r;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002664 union {
2665 struct kvm_lapic_state *lapic;
2666 struct kvm_xsave *xsave;
2667 struct kvm_xcrs *xcrs;
2668 void *buffer;
2669 } u;
Carsten Otte313a3dc2007-10-11 19:16:52 +02002670
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002671 u.buffer = NULL;
Carsten Otte313a3dc2007-10-11 19:16:52 +02002672 switch (ioctl) {
2673 case KVM_GET_LAPIC: {
Marcelo Tosatti2204ae32009-10-29 13:44:16 -02002674 r = -EINVAL;
2675 if (!vcpu->arch.apic)
2676 goto out;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002677 u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002678
Dave Hansenb772ff32008-08-11 10:01:47 -07002679 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002680 if (!u.lapic)
Dave Hansenb772ff32008-08-11 10:01:47 -07002681 goto out;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002682 r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002683 if (r)
2684 goto out;
2685 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002686 if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state)))
Carsten Otte313a3dc2007-10-11 19:16:52 +02002687 goto out;
2688 r = 0;
2689 break;
2690 }
2691 case KVM_SET_LAPIC: {
Marcelo Tosatti2204ae32009-10-29 13:44:16 -02002692 if (!vcpu->arch.apic)
2693 goto out;
Sasha Levinff5c2c02011-12-04 19:36:29 +02002694 u.lapic = memdup_user(argp, sizeof(*u.lapic));
Guo Chao18595412012-11-02 18:33:21 +08002695 if (IS_ERR(u.lapic))
2696 return PTR_ERR(u.lapic);
Sasha Levinff5c2c02011-12-04 19:36:29 +02002697
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002698 r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002699 if (r)
2700 goto out;
2701 r = 0;
2702 break;
2703 }
Zhang Xiantaof77bc6a2007-11-21 04:36:41 +08002704 case KVM_INTERRUPT: {
2705 struct kvm_interrupt irq;
2706
2707 r = -EFAULT;
2708 if (copy_from_user(&irq, argp, sizeof irq))
2709 goto out;
2710 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2711 if (r)
2712 goto out;
2713 r = 0;
2714 break;
2715 }
Jan Kiszkac4abb7c2008-09-26 09:30:55 +02002716 case KVM_NMI: {
2717 r = kvm_vcpu_ioctl_nmi(vcpu);
2718 if (r)
2719 goto out;
2720 r = 0;
2721 break;
2722 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02002723 case KVM_SET_CPUID: {
2724 struct kvm_cpuid __user *cpuid_arg = argp;
2725 struct kvm_cpuid cpuid;
2726
2727 r = -EFAULT;
2728 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2729 goto out;
2730 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2731 if (r)
2732 goto out;
2733 break;
2734 }
Dan Kenigsberg07716712007-11-21 17:10:04 +02002735 case KVM_SET_CPUID2: {
2736 struct kvm_cpuid2 __user *cpuid_arg = argp;
2737 struct kvm_cpuid2 cpuid;
2738
2739 r = -EFAULT;
2740 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2741 goto out;
2742 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
Amit Shah19355472009-01-14 16:56:00 +00002743 cpuid_arg->entries);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002744 if (r)
2745 goto out;
2746 break;
2747 }
2748 case KVM_GET_CPUID2: {
2749 struct kvm_cpuid2 __user *cpuid_arg = argp;
2750 struct kvm_cpuid2 cpuid;
2751
2752 r = -EFAULT;
2753 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2754 goto out;
2755 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
Amit Shah19355472009-01-14 16:56:00 +00002756 cpuid_arg->entries);
Dan Kenigsberg07716712007-11-21 17:10:04 +02002757 if (r)
2758 goto out;
2759 r = -EFAULT;
2760 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2761 goto out;
2762 r = 0;
2763 break;
2764 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02002765 case KVM_GET_MSRS:
2766 r = msr_io(vcpu, argp, kvm_get_msr, 1);
2767 break;
2768 case KVM_SET_MSRS:
2769 r = msr_io(vcpu, argp, do_set_msr, 0);
2770 break;
Avi Kivityb209749f2007-10-22 16:50:39 +02002771 case KVM_TPR_ACCESS_REPORTING: {
2772 struct kvm_tpr_access_ctl tac;
2773
2774 r = -EFAULT;
2775 if (copy_from_user(&tac, argp, sizeof tac))
2776 goto out;
2777 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
2778 if (r)
2779 goto out;
2780 r = -EFAULT;
2781 if (copy_to_user(argp, &tac, sizeof tac))
2782 goto out;
2783 r = 0;
2784 break;
2785 };
Avi Kivityb93463a2007-10-25 16:52:32 +02002786 case KVM_SET_VAPIC_ADDR: {
2787 struct kvm_vapic_addr va;
2788
2789 r = -EINVAL;
2790 if (!irqchip_in_kernel(vcpu->kvm))
2791 goto out;
2792 r = -EFAULT;
2793 if (copy_from_user(&va, argp, sizeof va))
2794 goto out;
2795 r = 0;
2796 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
2797 break;
2798 }
Huang Ying890ca9a2009-05-11 16:48:15 +08002799 case KVM_X86_SETUP_MCE: {
2800 u64 mcg_cap;
2801
2802 r = -EFAULT;
2803 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
2804 goto out;
2805 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
2806 break;
2807 }
2808 case KVM_X86_SET_MCE: {
2809 struct kvm_x86_mce mce;
2810
2811 r = -EFAULT;
2812 if (copy_from_user(&mce, argp, sizeof mce))
2813 goto out;
2814 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
2815 break;
2816 }
Jan Kiszka3cfc3092009-11-12 01:04:25 +01002817 case KVM_GET_VCPU_EVENTS: {
2818 struct kvm_vcpu_events events;
2819
2820 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
2821
2822 r = -EFAULT;
2823 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
2824 break;
2825 r = 0;
2826 break;
2827 }
2828 case KVM_SET_VCPU_EVENTS: {
2829 struct kvm_vcpu_events events;
2830
2831 r = -EFAULT;
2832 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
2833 break;
2834
2835 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
2836 break;
2837 }
Jan Kiszkaa1efbe72010-02-15 10:45:43 +01002838 case KVM_GET_DEBUGREGS: {
2839 struct kvm_debugregs dbgregs;
2840
2841 kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
2842
2843 r = -EFAULT;
2844 if (copy_to_user(argp, &dbgregs,
2845 sizeof(struct kvm_debugregs)))
2846 break;
2847 r = 0;
2848 break;
2849 }
2850 case KVM_SET_DEBUGREGS: {
2851 struct kvm_debugregs dbgregs;
2852
2853 r = -EFAULT;
2854 if (copy_from_user(&dbgregs, argp,
2855 sizeof(struct kvm_debugregs)))
2856 break;
2857
2858 r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
2859 break;
2860 }
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002861 case KVM_GET_XSAVE: {
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002862 u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002863 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002864 if (!u.xsave)
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002865 break;
2866
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002867 kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002868
2869 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002870 if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave)))
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002871 break;
2872 r = 0;
2873 break;
2874 }
2875 case KVM_SET_XSAVE: {
Sasha Levinff5c2c02011-12-04 19:36:29 +02002876 u.xsave = memdup_user(argp, sizeof(*u.xsave));
Guo Chao18595412012-11-02 18:33:21 +08002877 if (IS_ERR(u.xsave))
2878 return PTR_ERR(u.xsave);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002879
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002880 r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002881 break;
2882 }
2883 case KVM_GET_XCRS: {
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002884 u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002885 r = -ENOMEM;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002886 if (!u.xcrs)
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002887 break;
2888
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002889 kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002890
2891 r = -EFAULT;
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002892 if (copy_to_user(argp, u.xcrs,
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002893 sizeof(struct kvm_xcrs)))
2894 break;
2895 r = 0;
2896 break;
2897 }
2898 case KVM_SET_XCRS: {
Sasha Levinff5c2c02011-12-04 19:36:29 +02002899 u.xcrs = memdup_user(argp, sizeof(*u.xcrs));
Guo Chao18595412012-11-02 18:33:21 +08002900 if (IS_ERR(u.xcrs))
2901 return PTR_ERR(u.xcrs);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002902
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002903 r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs);
Sheng Yang2d5b5a62010-06-13 17:29:39 +08002904 break;
2905 }
Joerg Roedel92a1f122011-03-25 09:44:51 +01002906 case KVM_SET_TSC_KHZ: {
2907 u32 user_tsc_khz;
2908
2909 r = -EINVAL;
Joerg Roedel92a1f122011-03-25 09:44:51 +01002910 user_tsc_khz = (u32)arg;
2911
2912 if (user_tsc_khz >= kvm_max_guest_tsc_khz)
2913 goto out;
2914
Zachary Amsdencc578282012-02-03 15:43:50 -02002915 if (user_tsc_khz == 0)
2916 user_tsc_khz = tsc_khz;
2917
2918 kvm_set_tsc_khz(vcpu, user_tsc_khz);
Joerg Roedel92a1f122011-03-25 09:44:51 +01002919
2920 r = 0;
2921 goto out;
2922 }
2923 case KVM_GET_TSC_KHZ: {
Zachary Amsdencc578282012-02-03 15:43:50 -02002924 r = vcpu->arch.virtual_tsc_khz;
Joerg Roedel92a1f122011-03-25 09:44:51 +01002925 goto out;
2926 }
Eric B Munson1c0b28c2012-03-10 14:37:27 -05002927 case KVM_KVMCLOCK_CTRL: {
2928 r = kvm_set_guest_paused(vcpu);
2929 goto out;
2930 }
Carsten Otte313a3dc2007-10-11 19:16:52 +02002931 default:
2932 r = -EINVAL;
2933 }
2934out:
Avi Kivityd1ac91d2010-06-20 15:54:43 +03002935 kfree(u.buffer);
Carsten Otte313a3dc2007-10-11 19:16:52 +02002936 return r;
2937}
2938
Carsten Otte5b1c1492012-01-04 10:25:23 +01002939int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2940{
2941 return VM_FAULT_SIGBUS;
2942}
2943
Carsten Otte1fe779f2007-10-29 16:08:35 +01002944static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
2945{
2946 int ret;
2947
2948 if (addr > (unsigned int)(-3 * PAGE_SIZE))
2949 return -1;
2950 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
2951 return ret;
2952}
2953
Sheng Yangb927a3c2009-07-21 10:42:48 +08002954static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
2955 u64 ident_addr)
2956{
2957 kvm->arch.ept_identity_map_addr = ident_addr;
2958 return 0;
2959}
2960
Carsten Otte1fe779f2007-10-29 16:08:35 +01002961static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
2962 u32 kvm_nr_mmu_pages)
2963{
2964 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
2965 return -EINVAL;
2966
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002967 mutex_lock(&kvm->slots_lock);
Marcelo Tosatti7c8a83b2009-05-12 18:55:43 -03002968 spin_lock(&kvm->mmu_lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01002969
2970 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
Zhang Xiantaof05e70a2007-12-14 10:01:48 +08002971 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
Carsten Otte1fe779f2007-10-29 16:08:35 +01002972
Marcelo Tosatti7c8a83b2009-05-12 18:55:43 -03002973 spin_unlock(&kvm->mmu_lock);
Marcelo Tosatti79fac952009-12-23 14:35:26 -02002974 mutex_unlock(&kvm->slots_lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01002975 return 0;
2976}
2977
2978static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
2979{
Dave Hansen39de71e2010-08-19 18:11:14 -07002980 return kvm->arch.n_max_mmu_pages;
Carsten Otte1fe779f2007-10-29 16:08:35 +01002981}
2982
Carsten Otte1fe779f2007-10-29 16:08:35 +01002983static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2984{
2985 int r;
2986
2987 r = 0;
2988 switch (chip->chip_id) {
2989 case KVM_IRQCHIP_PIC_MASTER:
2990 memcpy(&chip->chip.pic,
2991 &pic_irqchip(kvm)->pics[0],
2992 sizeof(struct kvm_pic_state));
2993 break;
2994 case KVM_IRQCHIP_PIC_SLAVE:
2995 memcpy(&chip->chip.pic,
2996 &pic_irqchip(kvm)->pics[1],
2997 sizeof(struct kvm_pic_state));
2998 break;
2999 case KVM_IRQCHIP_IOAPIC:
Gleb Natapoveba02262009-08-24 11:54:25 +03003000 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003001 break;
3002 default:
3003 r = -EINVAL;
3004 break;
3005 }
3006 return r;
3007}
3008
3009static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
3010{
3011 int r;
3012
3013 r = 0;
3014 switch (chip->chip_id) {
3015 case KVM_IRQCHIP_PIC_MASTER:
Avi Kivityf4f51052010-09-19 18:44:07 +02003016 spin_lock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003017 memcpy(&pic_irqchip(kvm)->pics[0],
3018 &chip->chip.pic,
3019 sizeof(struct kvm_pic_state));
Avi Kivityf4f51052010-09-19 18:44:07 +02003020 spin_unlock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003021 break;
3022 case KVM_IRQCHIP_PIC_SLAVE:
Avi Kivityf4f51052010-09-19 18:44:07 +02003023 spin_lock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003024 memcpy(&pic_irqchip(kvm)->pics[1],
3025 &chip->chip.pic,
3026 sizeof(struct kvm_pic_state));
Avi Kivityf4f51052010-09-19 18:44:07 +02003027 spin_unlock(&pic_irqchip(kvm)->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003028 break;
3029 case KVM_IRQCHIP_IOAPIC:
Gleb Natapoveba02262009-08-24 11:54:25 +03003030 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003031 break;
3032 default:
3033 r = -EINVAL;
3034 break;
3035 }
3036 kvm_pic_update_irq(pic_irqchip(kvm));
3037 return r;
3038}
3039
Sheng Yange0f63cb2008-03-04 00:50:59 +08003040static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
3041{
3042 int r = 0;
3043
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003044 mutex_lock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003045 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003046 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003047 return r;
3048}
3049
3050static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
3051{
3052 int r = 0;
3053
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003054 mutex_lock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003055 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
Beth Kone9f42752009-07-07 11:50:38 -04003056 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
3057 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
3058 return r;
3059}
3060
3061static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
3062{
3063 int r = 0;
3064
3065 mutex_lock(&kvm->arch.vpit->pit_state.lock);
3066 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
3067 sizeof(ps->channels));
3068 ps->flags = kvm->arch.vpit->pit_state.flags;
3069 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04003070 memset(&ps->reserved, 0, sizeof(ps->reserved));
Beth Kone9f42752009-07-07 11:50:38 -04003071 return r;
3072}
3073
3074static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
3075{
3076 int r = 0, start = 0;
3077 u32 prev_legacy, cur_legacy;
3078 mutex_lock(&kvm->arch.vpit->pit_state.lock);
3079 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
3080 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
3081 if (!prev_legacy && cur_legacy)
3082 start = 1;
3083 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
3084 sizeof(kvm->arch.vpit->pit_state.channels));
3085 kvm->arch.vpit->pit_state.flags = ps->flags;
3086 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003087 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003088 return r;
3089}
3090
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003091static int kvm_vm_ioctl_reinject(struct kvm *kvm,
3092 struct kvm_reinject_control *control)
3093{
3094 if (!kvm->arch.vpit)
3095 return -ENXIO;
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003096 mutex_lock(&kvm->arch.vpit->pit_state.lock);
Avi Kivity26ef1922012-07-26 18:01:53 +03003097 kvm->arch.vpit->pit_state.reinject = control->pit_reinject;
Marcelo Tosatti894a9c52009-06-23 15:05:14 -03003098 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003099 return 0;
3100}
3101
Takuya Yoshikawa95d4c162011-11-14 18:24:50 +09003102/**
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003103 * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot
3104 * @kvm: kvm instance
3105 * @log: slot id and address to which we copy the log
Takuya Yoshikawa95d4c162011-11-14 18:24:50 +09003106 *
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003107 * We need to keep it in mind that VCPU threads can write to the bitmap
3108 * concurrently. So, to avoid losing data, we keep the following order for
3109 * each bit:
Takuya Yoshikawa95d4c162011-11-14 18:24:50 +09003110 *
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003111 * 1. Take a snapshot of the bit and clear it if needed.
3112 * 2. Write protect the corresponding page.
3113 * 3. Flush TLB's if needed.
3114 * 4. Copy the snapshot to the userspace.
Takuya Yoshikawa95d4c162011-11-14 18:24:50 +09003115 *
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003116 * Between 2 and 3, the guest may write to the page using the remaining TLB
3117 * entry. This is not a problem because the page will be reported dirty at
3118 * step 4 using the snapshot taken before and step 3 ensures that successive
3119 * writes will be logged for the next call.
Takuya Yoshikawa95d4c162011-11-14 18:24:50 +09003120 */
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003121int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003122{
Takuya Yoshikawa7850ac52011-11-14 18:23:34 +09003123 int r;
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003124 struct kvm_memory_slot *memslot;
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003125 unsigned long n, i;
3126 unsigned long *dirty_bitmap;
3127 unsigned long *dirty_bitmap_buffer;
3128 bool is_dirty = false;
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003129
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003130 mutex_lock(&kvm->slots_lock);
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003131
Marcelo Tosattib050b012009-12-23 14:35:22 -02003132 r = -EINVAL;
3133 if (log->slot >= KVM_MEMORY_SLOTS)
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003134 goto out;
3135
Xiao Guangrong28a37542011-11-24 19:04:35 +08003136 memslot = id_to_memslot(kvm->memslots, log->slot);
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003137
3138 dirty_bitmap = memslot->dirty_bitmap;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003139 r = -ENOENT;
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003140 if (!dirty_bitmap)
Marcelo Tosattib050b012009-12-23 14:35:22 -02003141 goto out;
3142
Takuya Yoshikawa87bf6e72010-04-12 19:35:35 +09003143 n = kvm_dirty_bitmap_bytes(memslot);
Marcelo Tosattib050b012009-12-23 14:35:22 -02003144
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003145 dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long);
3146 memset(dirty_bitmap_buffer, 0, n);
Marcelo Tosattib050b012009-12-23 14:35:22 -02003147
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003148 spin_lock(&kvm->mmu_lock);
Marcelo Tosattib050b012009-12-23 14:35:22 -02003149
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003150 for (i = 0; i < n / sizeof(long); i++) {
3151 unsigned long mask;
3152 gfn_t offset;
Sasha Levincdfca7b2011-12-04 19:36:28 +02003153
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003154 if (!dirty_bitmap[i])
3155 continue;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003156
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003157 is_dirty = true;
Takuya Yoshikawa914ebcc2010-04-28 18:50:36 +09003158
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003159 mask = xchg(&dirty_bitmap[i], 0);
3160 dirty_bitmap_buffer[i] = mask;
Michael S. Tsirkinedde99c2010-10-25 03:21:24 +02003161
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003162 offset = i * BITS_PER_LONG;
3163 kvm_mmu_write_protect_pt_masked(kvm, memslot, offset, mask);
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003164 }
Takuya Yoshikawa60c34612012-03-03 14:21:48 +09003165 if (is_dirty)
3166 kvm_flush_remote_tlbs(kvm);
3167
3168 spin_unlock(&kvm->mmu_lock);
3169
3170 r = -EFAULT;
3171 if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n))
3172 goto out;
Marcelo Tosattib050b012009-12-23 14:35:22 -02003173
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003174 r = 0;
3175out:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003176 mutex_unlock(&kvm->slots_lock);
Zhang Xiantao5bb064d2007-11-18 20:29:43 +08003177 return r;
3178}
3179
Christoffer Dall23d43cf2012-07-24 08:51:20 -04003180int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event)
3181{
3182 if (!irqchip_in_kernel(kvm))
3183 return -ENXIO;
3184
3185 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
3186 irq_event->irq, irq_event->level);
3187 return 0;
3188}
3189
Carsten Otte1fe779f2007-10-29 16:08:35 +01003190long kvm_arch_vm_ioctl(struct file *filp,
3191 unsigned int ioctl, unsigned long arg)
3192{
3193 struct kvm *kvm = filp->private_data;
3194 void __user *argp = (void __user *)arg;
Avi Kivity367e1312009-08-26 14:57:07 +03003195 int r = -ENOTTY;
Dave Hansenf0d66272008-08-11 10:01:45 -07003196 /*
3197 * This union makes it completely explicit to gcc-3.x
3198 * that these two variables' stack usage should be
3199 * combined, not added together.
3200 */
3201 union {
3202 struct kvm_pit_state ps;
Beth Kone9f42752009-07-07 11:50:38 -04003203 struct kvm_pit_state2 ps2;
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02003204 struct kvm_pit_config pit_config;
Dave Hansenf0d66272008-08-11 10:01:45 -07003205 } u;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003206
3207 switch (ioctl) {
3208 case KVM_SET_TSS_ADDR:
3209 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
3210 if (r < 0)
3211 goto out;
3212 break;
Sheng Yangb927a3c2009-07-21 10:42:48 +08003213 case KVM_SET_IDENTITY_MAP_ADDR: {
3214 u64 ident_addr;
3215
3216 r = -EFAULT;
3217 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
3218 goto out;
3219 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
3220 if (r < 0)
3221 goto out;
3222 break;
3223 }
Carsten Otte1fe779f2007-10-29 16:08:35 +01003224 case KVM_SET_NR_MMU_PAGES:
3225 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
3226 if (r)
3227 goto out;
3228 break;
3229 case KVM_GET_NR_MMU_PAGES:
3230 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
3231 break;
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003232 case KVM_CREATE_IRQCHIP: {
3233 struct kvm_pic *vpic;
3234
3235 mutex_lock(&kvm->lock);
3236 r = -EEXIST;
3237 if (kvm->arch.vpic)
3238 goto create_irqchip_unlock;
Avi Kivity3e515702012-03-05 14:23:29 +02003239 r = -EINVAL;
3240 if (atomic_read(&kvm->online_vcpus))
3241 goto create_irqchip_unlock;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003242 r = -ENOMEM;
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003243 vpic = kvm_create_pic(kvm);
3244 if (vpic) {
Carsten Otte1fe779f2007-10-29 16:08:35 +01003245 r = kvm_ioapic_init(kvm);
3246 if (r) {
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003247 mutex_lock(&kvm->slots_lock);
Wei Yongjun72bb2fc2010-02-09 10:33:03 +08003248 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
Sasha Levin743eeb02011-07-27 16:00:48 +03003249 &vpic->dev_master);
3250 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3251 &vpic->dev_slave);
3252 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3253 &vpic->dev_eclr);
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003254 mutex_unlock(&kvm->slots_lock);
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003255 kfree(vpic);
3256 goto create_irqchip_unlock;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003257 }
3258 } else
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003259 goto create_irqchip_unlock;
3260 smp_wmb();
3261 kvm->arch.vpic = vpic;
3262 smp_wmb();
Avi Kivity399ec802008-11-19 13:58:46 +02003263 r = kvm_setup_default_irq_routing(kvm);
3264 if (r) {
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003265 mutex_lock(&kvm->slots_lock);
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003266 mutex_lock(&kvm->irq_lock);
Wei Yongjun72bb2fc2010-02-09 10:33:03 +08003267 kvm_ioapic_destroy(kvm);
3268 kvm_destroy_pic(kvm);
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003269 mutex_unlock(&kvm->irq_lock);
Takuya Yoshikawa175504c2010-12-16 01:41:37 +09003270 mutex_unlock(&kvm->slots_lock);
Avi Kivity399ec802008-11-19 13:58:46 +02003271 }
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003272 create_irqchip_unlock:
3273 mutex_unlock(&kvm->lock);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003274 break;
Marcelo Tosatti3ddea122009-10-29 13:44:15 -02003275 }
Sheng Yang78376992008-01-28 05:10:22 +08003276 case KVM_CREATE_PIT:
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02003277 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
3278 goto create_pit;
3279 case KVM_CREATE_PIT2:
3280 r = -EFAULT;
3281 if (copy_from_user(&u.pit_config, argp,
3282 sizeof(struct kvm_pit_config)))
3283 goto out;
3284 create_pit:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003285 mutex_lock(&kvm->slots_lock);
Avi Kivity269e05e2009-01-05 15:21:42 +02003286 r = -EEXIST;
3287 if (kvm->arch.vpit)
3288 goto create_pit_unlock;
Sheng Yang78376992008-01-28 05:10:22 +08003289 r = -ENOMEM;
Jan Kiszkac5ff41c2009-05-14 22:42:53 +02003290 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
Sheng Yang78376992008-01-28 05:10:22 +08003291 if (kvm->arch.vpit)
3292 r = 0;
Avi Kivity269e05e2009-01-05 15:21:42 +02003293 create_pit_unlock:
Marcelo Tosatti79fac952009-12-23 14:35:26 -02003294 mutex_unlock(&kvm->slots_lock);
Sheng Yang78376992008-01-28 05:10:22 +08003295 break;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003296 case KVM_GET_IRQCHIP: {
3297 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
Sasha Levinff5c2c02011-12-04 19:36:29 +02003298 struct kvm_irqchip *chip;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003299
Sasha Levinff5c2c02011-12-04 19:36:29 +02003300 chip = memdup_user(argp, sizeof(*chip));
3301 if (IS_ERR(chip)) {
3302 r = PTR_ERR(chip);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003303 goto out;
Sasha Levinff5c2c02011-12-04 19:36:29 +02003304 }
3305
Carsten Otte1fe779f2007-10-29 16:08:35 +01003306 r = -ENXIO;
3307 if (!irqchip_in_kernel(kvm))
Dave Hansenf0d66272008-08-11 10:01:45 -07003308 goto get_irqchip_out;
3309 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
3310 if (r)
3311 goto get_irqchip_out;
3312 r = -EFAULT;
3313 if (copy_to_user(argp, chip, sizeof *chip))
3314 goto get_irqchip_out;
3315 r = 0;
3316 get_irqchip_out:
3317 kfree(chip);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003318 if (r)
3319 goto out;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003320 break;
3321 }
3322 case KVM_SET_IRQCHIP: {
3323 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
Sasha Levinff5c2c02011-12-04 19:36:29 +02003324 struct kvm_irqchip *chip;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003325
Sasha Levinff5c2c02011-12-04 19:36:29 +02003326 chip = memdup_user(argp, sizeof(*chip));
3327 if (IS_ERR(chip)) {
3328 r = PTR_ERR(chip);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003329 goto out;
Sasha Levinff5c2c02011-12-04 19:36:29 +02003330 }
3331
Carsten Otte1fe779f2007-10-29 16:08:35 +01003332 r = -ENXIO;
3333 if (!irqchip_in_kernel(kvm))
Dave Hansenf0d66272008-08-11 10:01:45 -07003334 goto set_irqchip_out;
3335 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
3336 if (r)
3337 goto set_irqchip_out;
3338 r = 0;
3339 set_irqchip_out:
3340 kfree(chip);
Carsten Otte1fe779f2007-10-29 16:08:35 +01003341 if (r)
3342 goto out;
Carsten Otte1fe779f2007-10-29 16:08:35 +01003343 break;
3344 }
Sheng Yange0f63cb2008-03-04 00:50:59 +08003345 case KVM_GET_PIT: {
Sheng Yange0f63cb2008-03-04 00:50:59 +08003346 r = -EFAULT;
Dave Hansenf0d66272008-08-11 10:01:45 -07003347 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
Sheng Yange0f63cb2008-03-04 00:50:59 +08003348 goto out;
3349 r = -ENXIO;
3350 if (!kvm->arch.vpit)
3351 goto out;
Dave Hansenf0d66272008-08-11 10:01:45 -07003352 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003353 if (r)
3354 goto out;
3355 r = -EFAULT;
Dave Hansenf0d66272008-08-11 10:01:45 -07003356 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
Sheng Yange0f63cb2008-03-04 00:50:59 +08003357 goto out;
3358 r = 0;
3359 break;
3360 }
3361 case KVM_SET_PIT: {
Sheng Yange0f63cb2008-03-04 00:50:59 +08003362 r = -EFAULT;
Dave Hansenf0d66272008-08-11 10:01:45 -07003363 if (copy_from_user(&u.ps, argp, sizeof u.ps))
Sheng Yange0f63cb2008-03-04 00:50:59 +08003364 goto out;
3365 r = -ENXIO;
3366 if (!kvm->arch.vpit)
3367 goto out;
Dave Hansenf0d66272008-08-11 10:01:45 -07003368 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
Sheng Yange0f63cb2008-03-04 00:50:59 +08003369 if (r)
3370 goto out;
3371 r = 0;
3372 break;
3373 }
Beth Kone9f42752009-07-07 11:50:38 -04003374 case KVM_GET_PIT2: {
3375 r = -ENXIO;
3376 if (!kvm->arch.vpit)
3377 goto out;
3378 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
3379 if (r)
3380 goto out;
3381 r = -EFAULT;
3382 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
3383 goto out;
3384 r = 0;
3385 break;
3386 }
3387 case KVM_SET_PIT2: {
3388 r = -EFAULT;
3389 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
3390 goto out;
3391 r = -ENXIO;
3392 if (!kvm->arch.vpit)
3393 goto out;
3394 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
3395 if (r)
3396 goto out;
3397 r = 0;
3398 break;
3399 }
Marcelo Tosatti52d939a2008-12-30 15:55:06 -02003400 case KVM_REINJECT_CONTROL: {
3401 struct kvm_reinject_control control;
3402 r = -EFAULT;
3403 if (copy_from_user(&control, argp, sizeof(control)))
3404 goto out;
3405 r = kvm_vm_ioctl_reinject(kvm, &control);
3406 if (r)
3407 goto out;
3408 r = 0;
3409 break;
3410 }
Ed Swierkffde22a2009-10-15 15:21:43 -07003411 case KVM_XEN_HVM_CONFIG: {
3412 r = -EFAULT;
3413 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
3414 sizeof(struct kvm_xen_hvm_config)))
3415 goto out;
3416 r = -EINVAL;
3417 if (kvm->arch.xen_hvm_config.flags)
3418 goto out;
3419 r = 0;
3420 break;
3421 }
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003422 case KVM_SET_CLOCK: {
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003423 struct kvm_clock_data user_ns;
3424 u64 now_ns;
3425 s64 delta;
3426
3427 r = -EFAULT;
3428 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
3429 goto out;
3430
3431 r = -EINVAL;
3432 if (user_ns.flags)
3433 goto out;
3434
3435 r = 0;
Avi Kivity395c6b02010-10-04 12:55:49 +02003436 local_irq_disable();
Zachary Amsden759379d2010-08-19 22:07:25 -10003437 now_ns = get_kernel_ns();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003438 delta = user_ns.clock - now_ns;
Avi Kivity395c6b02010-10-04 12:55:49 +02003439 local_irq_enable();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003440 kvm->arch.kvmclock_offset = delta;
3441 break;
3442 }
3443 case KVM_GET_CLOCK: {
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003444 struct kvm_clock_data user_ns;
3445 u64 now_ns;
3446
Avi Kivity395c6b02010-10-04 12:55:49 +02003447 local_irq_disable();
Zachary Amsden759379d2010-08-19 22:07:25 -10003448 now_ns = get_kernel_ns();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003449 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
Avi Kivity395c6b02010-10-04 12:55:49 +02003450 local_irq_enable();
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003451 user_ns.flags = 0;
Vasiliy Kulikov97e69aa2010-10-30 22:54:47 +04003452 memset(&user_ns.pad, 0, sizeof(user_ns.pad));
Glauber Costaafbcf7a2009-10-16 15:28:36 -04003453
3454 r = -EFAULT;
3455 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3456 goto out;
3457 r = 0;
3458 break;
3459 }
3460
Carsten Otte1fe779f2007-10-29 16:08:35 +01003461 default:
3462 ;
3463 }
3464out:
3465 return r;
3466}
3467
Zhang Xiantaoa16b0432007-11-16 14:38:21 +08003468static void kvm_init_msr_list(void)
Carsten Otte043405e2007-10-10 17:16:19 +02003469{
3470 u32 dummy[2];
3471 unsigned i, j;
3472
Glauber Costae3267cb2009-10-06 13:24:50 -04003473 /* skip the first msrs in the list. KVM-specific */
3474 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
Carsten Otte043405e2007-10-10 17:16:19 +02003475 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3476 continue;
3477 if (j < i)
3478 msrs_to_save[j] = msrs_to_save[i];
3479 j++;
3480 }
3481 num_msrs_to_save = j;
3482}
3483
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03003484static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3485 const void *v)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003486{
Avi Kivity70252a12010-01-19 12:51:22 +02003487 int handled = 0;
3488 int n;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003489
Avi Kivity70252a12010-01-19 12:51:22 +02003490 do {
3491 n = min(len, 8);
3492 if (!(vcpu->arch.apic &&
3493 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v))
3494 && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
3495 break;
3496 handled += n;
3497 addr += n;
3498 len -= n;
3499 v += n;
3500 } while (len);
3501
3502 return handled;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003503}
3504
Michael S. Tsirkinbda90202009-06-29 22:24:32 +03003505static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003506{
Avi Kivity70252a12010-01-19 12:51:22 +02003507 int handled = 0;
3508 int n;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003509
Avi Kivity70252a12010-01-19 12:51:22 +02003510 do {
3511 n = min(len, 8);
3512 if (!(vcpu->arch.apic &&
3513 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v))
3514 && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
3515 break;
3516 trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v);
3517 handled += n;
3518 addr += n;
3519 len -= n;
3520 v += n;
3521 } while (len);
3522
3523 return handled;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003524}
3525
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02003526static void kvm_set_segment(struct kvm_vcpu *vcpu,
3527 struct kvm_segment *var, int seg)
3528{
3529 kvm_x86_ops->set_segment(vcpu, var, seg);
3530}
3531
3532void kvm_get_segment(struct kvm_vcpu *vcpu,
3533 struct kvm_segment *var, int seg)
3534{
3535 kvm_x86_ops->get_segment(vcpu, var, seg);
3536}
3537
Xiao Guangronge459e322011-11-28 20:42:16 +08003538gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
Joerg Roedel02f59dc2010-09-10 17:30:54 +02003539{
3540 gpa_t t_gpa;
Avi Kivityab9ae312010-11-22 17:53:26 +02003541 struct x86_exception exception;
Joerg Roedel02f59dc2010-09-10 17:30:54 +02003542
3543 BUG_ON(!mmu_is_nested(vcpu));
3544
3545 /* NPT walks are always user-walks */
3546 access |= PFERR_USER_MASK;
Avi Kivityab9ae312010-11-22 17:53:26 +02003547 t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception);
Joerg Roedel02f59dc2010-09-10 17:30:54 +02003548
3549 return t_gpa;
3550}
3551
Avi Kivityab9ae312010-11-22 17:53:26 +02003552gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
3553 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003554{
3555 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
Avi Kivityab9ae312010-11-22 17:53:26 +02003556 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003557}
3558
Avi Kivityab9ae312010-11-22 17:53:26 +02003559 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
3560 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003561{
3562 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3563 access |= PFERR_FETCH_MASK;
Avi Kivityab9ae312010-11-22 17:53:26 +02003564 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003565}
3566
Avi Kivityab9ae312010-11-22 17:53:26 +02003567gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
3568 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003569{
3570 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3571 access |= PFERR_WRITE_MASK;
Avi Kivityab9ae312010-11-22 17:53:26 +02003572 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003573}
3574
3575/* uses this to access any guest's mapped memory without checking CPL */
Avi Kivityab9ae312010-11-22 17:53:26 +02003576gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
3577 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003578{
Avi Kivityab9ae312010-11-22 17:53:26 +02003579 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003580}
3581
3582static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3583 struct kvm_vcpu *vcpu, u32 access,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003584 struct x86_exception *exception)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003585{
3586 void *data = val;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003587 int r = X86EMUL_CONTINUE;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003588
3589 while (bytes) {
Joerg Roedel14dfe852010-09-10 17:30:49 +02003590 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access,
Avi Kivityab9ae312010-11-22 17:53:26 +02003591 exception);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003592 unsigned offset = addr & (PAGE_SIZE-1);
Izik Eidus77c20022008-12-29 01:42:19 +02003593 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003594 int ret;
3595
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003596 if (gpa == UNMAPPED_GVA)
Avi Kivityab9ae312010-11-22 17:53:26 +02003597 return X86EMUL_PROPAGATE_FAULT;
Izik Eidus77c20022008-12-29 01:42:19 +02003598 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003599 if (ret < 0) {
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03003600 r = X86EMUL_IO_NEEDED;
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003601 goto out;
3602 }
Carsten Ottebbd9b642007-10-30 18:44:21 +01003603
Izik Eidus77c20022008-12-29 01:42:19 +02003604 bytes -= toread;
3605 data += toread;
3606 addr += toread;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003607 }
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003608out:
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003609 return r;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003610}
Izik Eidus77c20022008-12-29 01:42:19 +02003611
Gleb Natapov1871c602010-02-10 14:21:32 +02003612/* used for instruction fetching */
Avi Kivity0f65dd72011-04-20 13:37:53 +03003613static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt,
3614 gva_t addr, void *val, unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003615 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003616{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003617 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov1871c602010-02-10 14:21:32 +02003618 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
Avi Kivity0f65dd72011-04-20 13:37:53 +03003619
Gleb Natapov1871c602010-02-10 14:21:32 +02003620 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003621 access | PFERR_FETCH_MASK,
3622 exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003623}
3624
Nadav Har'El064aea72011-05-25 23:04:56 +03003625int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
Avi Kivity0f65dd72011-04-20 13:37:53 +03003626 gva_t addr, void *val, unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003627 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003628{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003629 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov1871c602010-02-10 14:21:32 +02003630 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
Avi Kivity0f65dd72011-04-20 13:37:53 +03003631
Gleb Natapov1871c602010-02-10 14:21:32 +02003632 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003633 exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003634}
Nadav Har'El064aea72011-05-25 23:04:56 +03003635EXPORT_SYMBOL_GPL(kvm_read_guest_virt);
Gleb Natapov1871c602010-02-10 14:21:32 +02003636
Avi Kivity0f65dd72011-04-20 13:37:53 +03003637static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt,
3638 gva_t addr, void *val, unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003639 struct x86_exception *exception)
Gleb Natapov1871c602010-02-10 14:21:32 +02003640{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003641 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003642 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception);
Gleb Natapov1871c602010-02-10 14:21:32 +02003643}
3644
Nadav Har'El6a4d7552011-05-25 23:08:00 +03003645int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
Avi Kivity0f65dd72011-04-20 13:37:53 +03003646 gva_t addr, void *val,
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02003647 unsigned int bytes,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003648 struct x86_exception *exception)
Izik Eidus77c20022008-12-29 01:42:19 +02003649{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003650 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Izik Eidus77c20022008-12-29 01:42:19 +02003651 void *data = val;
3652 int r = X86EMUL_CONTINUE;
3653
3654 while (bytes) {
Joerg Roedel14dfe852010-09-10 17:30:49 +02003655 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr,
3656 PFERR_WRITE_MASK,
Avi Kivityab9ae312010-11-22 17:53:26 +02003657 exception);
Izik Eidus77c20022008-12-29 01:42:19 +02003658 unsigned offset = addr & (PAGE_SIZE-1);
3659 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
3660 int ret;
3661
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003662 if (gpa == UNMAPPED_GVA)
Avi Kivityab9ae312010-11-22 17:53:26 +02003663 return X86EMUL_PROPAGATE_FAULT;
Izik Eidus77c20022008-12-29 01:42:19 +02003664 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
3665 if (ret < 0) {
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03003666 r = X86EMUL_IO_NEEDED;
Izik Eidus77c20022008-12-29 01:42:19 +02003667 goto out;
3668 }
3669
3670 bytes -= towrite;
3671 data += towrite;
3672 addr += towrite;
3673 }
3674out:
3675 return r;
3676}
Nadav Har'El6a4d7552011-05-25 23:08:00 +03003677EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
Izik Eidus77c20022008-12-29 01:42:19 +02003678
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003679static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
3680 gpa_t *gpa, struct x86_exception *exception,
3681 bool write)
3682{
Avi Kivity97d64b782012-09-12 14:52:00 +03003683 u32 access = ((kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0)
3684 | (write ? PFERR_WRITE_MASK : 0);
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003685
Avi Kivity97d64b782012-09-12 14:52:00 +03003686 if (vcpu_match_mmio_gva(vcpu, gva)
3687 && !permission_fault(vcpu->arch.walk_mmu, vcpu->arch.access, access)) {
Xiao Guangrongbebb1062011-07-12 03:23:20 +08003688 *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT |
3689 (gva & (PAGE_SIZE - 1));
Xiao Guangrong4f022642011-07-12 03:34:24 +08003690 trace_vcpu_match_mmio(gva, *gpa, write, false);
Xiao Guangrongbebb1062011-07-12 03:23:20 +08003691 return 1;
3692 }
3693
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003694 *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
3695
3696 if (*gpa == UNMAPPED_GVA)
3697 return -1;
3698
3699 /* For APIC access vmexit */
3700 if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3701 return 1;
3702
Xiao Guangrong4f022642011-07-12 03:34:24 +08003703 if (vcpu_match_mmio_gpa(vcpu, *gpa)) {
3704 trace_vcpu_match_mmio(gva, *gpa, write, true);
Xiao Guangrongbebb1062011-07-12 03:23:20 +08003705 return 1;
Xiao Guangrong4f022642011-07-12 03:34:24 +08003706 }
Xiao Guangrongbebb1062011-07-12 03:23:20 +08003707
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003708 return 0;
3709}
3710
Marcelo Tosatti3200f402008-03-29 20:17:59 -03003711int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
Avi Kivitybcc55cb2010-11-22 17:53:22 +02003712 const void *val, int bytes)
Avi Kivity9f811282008-03-02 14:06:05 +02003713{
3714 int ret;
3715
3716 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
3717 if (ret < 0)
3718 return 0;
Xiao Guangrongf57f2ef2011-09-22 16:56:39 +08003719 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
Avi Kivity9f811282008-03-02 14:06:05 +02003720 return 1;
3721}
3722
Xiao Guangrong77d197b2011-07-13 14:31:50 +08003723struct read_write_emulator_ops {
3724 int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val,
3725 int bytes);
3726 int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa,
3727 void *val, int bytes);
3728 int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa,
3729 int bytes, void *val);
3730 int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa,
3731 void *val, int bytes);
3732 bool write;
3733};
3734
3735static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes)
3736{
3737 if (vcpu->mmio_read_completed) {
Xiao Guangrong77d197b2011-07-13 14:31:50 +08003738 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
Avi Kivityf78146b2012-04-18 19:22:47 +03003739 vcpu->mmio_fragments[0].gpa, *(u64 *)val);
Xiao Guangrong77d197b2011-07-13 14:31:50 +08003740 vcpu->mmio_read_completed = 0;
3741 return 1;
3742 }
3743
3744 return 0;
3745}
3746
3747static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa,
3748 void *val, int bytes)
3749{
3750 return !kvm_read_guest(vcpu->kvm, gpa, val, bytes);
3751}
3752
3753static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa,
3754 void *val, int bytes)
3755{
3756 return emulator_write_phys(vcpu, gpa, val, bytes);
3757}
3758
3759static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val)
3760{
3761 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
3762 return vcpu_mmio_write(vcpu, gpa, bytes, val);
3763}
3764
3765static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa,
3766 void *val, int bytes)
3767{
3768 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
3769 return X86EMUL_IO_NEEDED;
3770}
3771
3772static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa,
3773 void *val, int bytes)
3774{
Avi Kivityf78146b2012-04-18 19:22:47 +03003775 struct kvm_mmio_fragment *frag = &vcpu->mmio_fragments[0];
3776
3777 memcpy(vcpu->run->mmio.data, frag->data, frag->len);
Xiao Guangrong77d197b2011-07-13 14:31:50 +08003778 return X86EMUL_CONTINUE;
3779}
3780
Mathias Krause0fbe9b02012-08-30 01:30:17 +02003781static const struct read_write_emulator_ops read_emultor = {
Xiao Guangrong77d197b2011-07-13 14:31:50 +08003782 .read_write_prepare = read_prepare,
3783 .read_write_emulate = read_emulate,
3784 .read_write_mmio = vcpu_mmio_read,
3785 .read_write_exit_mmio = read_exit_mmio,
3786};
3787
Mathias Krause0fbe9b02012-08-30 01:30:17 +02003788static const struct read_write_emulator_ops write_emultor = {
Xiao Guangrong77d197b2011-07-13 14:31:50 +08003789 .read_write_emulate = write_emulate,
3790 .read_write_mmio = write_mmio,
3791 .read_write_exit_mmio = write_exit_mmio,
3792 .write = true,
3793};
3794
Xiao Guangrong22388a32011-07-13 14:32:31 +08003795static int emulator_read_write_onepage(unsigned long addr, void *val,
3796 unsigned int bytes,
3797 struct x86_exception *exception,
3798 struct kvm_vcpu *vcpu,
Mathias Krause0fbe9b02012-08-30 01:30:17 +02003799 const struct read_write_emulator_ops *ops)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003800{
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003801 gpa_t gpa;
3802 int handled, ret;
Xiao Guangrong22388a32011-07-13 14:32:31 +08003803 bool write = ops->write;
Avi Kivityf78146b2012-04-18 19:22:47 +03003804 struct kvm_mmio_fragment *frag;
Xiao Guangrong22388a32011-07-13 14:32:31 +08003805
3806 ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003807
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003808 if (ret < 0)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003809 return X86EMUL_PROPAGATE_FAULT;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003810
3811 /* For APIC access vmexit */
Xiao Guangrongaf7cc7d2011-07-12 03:22:46 +08003812 if (ret)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003813 goto mmio;
3814
Xiao Guangrong22388a32011-07-13 14:32:31 +08003815 if (ops->read_write_emulate(vcpu, gpa, val, bytes))
Carsten Ottebbd9b642007-10-30 18:44:21 +01003816 return X86EMUL_CONTINUE;
3817
3818mmio:
3819 /*
3820 * Is this MMIO handled locally?
3821 */
Xiao Guangrong22388a32011-07-13 14:32:31 +08003822 handled = ops->read_write_mmio(vcpu, gpa, bytes, val);
Avi Kivity70252a12010-01-19 12:51:22 +02003823 if (handled == bytes)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003824 return X86EMUL_CONTINUE;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003825
Avi Kivity70252a12010-01-19 12:51:22 +02003826 gpa += handled;
3827 bytes -= handled;
3828 val += handled;
3829
Avi Kivityf78146b2012-04-18 19:22:47 +03003830 while (bytes) {
3831 unsigned now = min(bytes, 8U);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003832
Avi Kivityf78146b2012-04-18 19:22:47 +03003833 frag = &vcpu->mmio_fragments[vcpu->mmio_nr_fragments++];
3834 frag->gpa = gpa;
3835 frag->data = val;
3836 frag->len = now;
3837
3838 gpa += now;
3839 val += now;
3840 bytes -= now;
3841 }
3842 return X86EMUL_CONTINUE;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003843}
3844
Xiao Guangrong22388a32011-07-13 14:32:31 +08003845int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr,
3846 void *val, unsigned int bytes,
3847 struct x86_exception *exception,
Mathias Krause0fbe9b02012-08-30 01:30:17 +02003848 const struct read_write_emulator_ops *ops)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003849{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003850 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Avi Kivityf78146b2012-04-18 19:22:47 +03003851 gpa_t gpa;
3852 int rc;
3853
3854 if (ops->read_write_prepare &&
3855 ops->read_write_prepare(vcpu, val, bytes))
3856 return X86EMUL_CONTINUE;
3857
3858 vcpu->mmio_nr_fragments = 0;
Avi Kivity0f65dd72011-04-20 13:37:53 +03003859
Carsten Ottebbd9b642007-10-30 18:44:21 +01003860 /* Crossing a page boundary? */
3861 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
Avi Kivityf78146b2012-04-18 19:22:47 +03003862 int now;
Carsten Ottebbd9b642007-10-30 18:44:21 +01003863
3864 now = -addr & ~PAGE_MASK;
Xiao Guangrong22388a32011-07-13 14:32:31 +08003865 rc = emulator_read_write_onepage(addr, val, now, exception,
3866 vcpu, ops);
3867
Carsten Ottebbd9b642007-10-30 18:44:21 +01003868 if (rc != X86EMUL_CONTINUE)
3869 return rc;
3870 addr += now;
3871 val += now;
3872 bytes -= now;
3873 }
Xiao Guangrong22388a32011-07-13 14:32:31 +08003874
Avi Kivityf78146b2012-04-18 19:22:47 +03003875 rc = emulator_read_write_onepage(addr, val, bytes, exception,
3876 vcpu, ops);
3877 if (rc != X86EMUL_CONTINUE)
3878 return rc;
3879
3880 if (!vcpu->mmio_nr_fragments)
3881 return rc;
3882
3883 gpa = vcpu->mmio_fragments[0].gpa;
3884
3885 vcpu->mmio_needed = 1;
3886 vcpu->mmio_cur_fragment = 0;
3887
3888 vcpu->run->mmio.len = vcpu->mmio_fragments[0].len;
3889 vcpu->run->mmio.is_write = vcpu->mmio_is_write = ops->write;
3890 vcpu->run->exit_reason = KVM_EXIT_MMIO;
3891 vcpu->run->mmio.phys_addr = gpa;
3892
3893 return ops->read_write_exit_mmio(vcpu, gpa, val, bytes);
Xiao Guangrong22388a32011-07-13 14:32:31 +08003894}
3895
3896static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
3897 unsigned long addr,
3898 void *val,
3899 unsigned int bytes,
3900 struct x86_exception *exception)
3901{
3902 return emulator_read_write(ctxt, addr, val, bytes,
3903 exception, &read_emultor);
3904}
3905
3906int emulator_write_emulated(struct x86_emulate_ctxt *ctxt,
3907 unsigned long addr,
3908 const void *val,
3909 unsigned int bytes,
3910 struct x86_exception *exception)
3911{
3912 return emulator_read_write(ctxt, addr, (void *)val, bytes,
3913 exception, &write_emultor);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003914}
Carsten Ottebbd9b642007-10-30 18:44:21 +01003915
Avi Kivitydaea3e72010-03-15 13:59:54 +02003916#define CMPXCHG_TYPE(t, ptr, old, new) \
3917 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3918
3919#ifdef CONFIG_X86_64
3920# define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3921#else
3922# define CMPXCHG64(ptr, old, new) \
Jan Kiszka9749a6c2010-03-20 10:14:13 +01003923 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
Avi Kivitydaea3e72010-03-15 13:59:54 +02003924#endif
3925
Avi Kivity0f65dd72011-04-20 13:37:53 +03003926static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt,
3927 unsigned long addr,
Carsten Ottebbd9b642007-10-30 18:44:21 +01003928 const void *old,
3929 const void *new,
3930 unsigned int bytes,
Avi Kivity0f65dd72011-04-20 13:37:53 +03003931 struct x86_exception *exception)
Carsten Ottebbd9b642007-10-30 18:44:21 +01003932{
Avi Kivity0f65dd72011-04-20 13:37:53 +03003933 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Avi Kivitydaea3e72010-03-15 13:59:54 +02003934 gpa_t gpa;
3935 struct page *page;
3936 char *kaddr;
3937 bool exchanged;
3938
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05003939 /* guests cmpxchg8b have to be emulated atomically */
Avi Kivitydaea3e72010-03-15 13:59:54 +02003940 if (bytes > 8 || (bytes & (bytes - 1)))
3941 goto emul_write;
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05003942
Avi Kivitydaea3e72010-03-15 13:59:54 +02003943 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
Marcelo Tosatti10589a42007-12-20 19:18:22 -05003944
Avi Kivitydaea3e72010-03-15 13:59:54 +02003945 if (gpa == UNMAPPED_GVA ||
3946 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3947 goto emul_write;
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05003948
Avi Kivitydaea3e72010-03-15 13:59:54 +02003949 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
3950 goto emul_write;
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05003951
Avi Kivitydaea3e72010-03-15 13:59:54 +02003952 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
Xiao Guangrong32cad842012-08-03 15:42:52 +08003953 if (is_error_page(page))
Wei Yongjunc19b8bd62010-07-15 08:51:58 +08003954 goto emul_write;
Izik Eidus72dc67a2008-02-10 18:04:15 +02003955
Cong Wang8fd75e12011-11-25 23:14:17 +08003956 kaddr = kmap_atomic(page);
Avi Kivitydaea3e72010-03-15 13:59:54 +02003957 kaddr += offset_in_page(gpa);
3958 switch (bytes) {
3959 case 1:
3960 exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
3961 break;
3962 case 2:
3963 exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
3964 break;
3965 case 4:
3966 exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
3967 break;
3968 case 8:
3969 exchanged = CMPXCHG64(kaddr, old, new);
3970 break;
3971 default:
3972 BUG();
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05003973 }
Cong Wang8fd75e12011-11-25 23:14:17 +08003974 kunmap_atomic(kaddr);
Avi Kivitydaea3e72010-03-15 13:59:54 +02003975 kvm_release_page_dirty(page);
3976
3977 if (!exchanged)
3978 return X86EMUL_CMPXCHG_FAILED;
3979
Xiao Guangrongf57f2ef2011-09-22 16:56:39 +08003980 kvm_mmu_pte_write(vcpu, gpa, new, bytes);
Gleb Natapov8f6abd02010-04-13 10:21:56 +03003981
3982 return X86EMUL_CONTINUE;
Avi Kivity4a5f48f2010-03-15 13:59:55 +02003983
Marcelo Tosatti3200f402008-03-29 20:17:59 -03003984emul_write:
Avi Kivitydaea3e72010-03-15 13:59:54 +02003985 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
Marcelo Tosatti2bacc552007-12-12 10:46:12 -05003986
Avi Kivity0f65dd72011-04-20 13:37:53 +03003987 return emulator_write_emulated(ctxt, addr, new, bytes, exception);
Carsten Ottebbd9b642007-10-30 18:44:21 +01003988}
3989
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02003990static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
3991{
3992 /* TODO: String I/O for in kernel device */
3993 int r;
3994
3995 if (vcpu->arch.pio.in)
3996 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
3997 vcpu->arch.pio.size, pd);
3998 else
3999 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
4000 vcpu->arch.pio.port, vcpu->arch.pio.size,
4001 pd);
4002 return r;
4003}
4004
Xiao Guangrong6f6fbe92011-09-22 16:55:10 +08004005static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size,
4006 unsigned short port, void *val,
4007 unsigned int count, bool in)
4008{
4009 trace_kvm_pio(!in, port, size, count);
4010
4011 vcpu->arch.pio.port = port;
4012 vcpu->arch.pio.in = in;
4013 vcpu->arch.pio.count = count;
4014 vcpu->arch.pio.size = size;
4015
4016 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
4017 vcpu->arch.pio.count = 0;
4018 return 1;
4019 }
4020
4021 vcpu->run->exit_reason = KVM_EXIT_IO;
4022 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
4023 vcpu->run->io.size = size;
4024 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
4025 vcpu->run->io.count = count;
4026 vcpu->run->io.port = port;
4027
4028 return 0;
4029}
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004030
Avi Kivityca1d4a92011-04-20 13:37:53 +03004031static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt,
4032 int size, unsigned short port, void *val,
4033 unsigned int count)
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004034{
Avi Kivityca1d4a92011-04-20 13:37:53 +03004035 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Xiao Guangrong6f6fbe92011-09-22 16:55:10 +08004036 int ret;
Avi Kivityca1d4a92011-04-20 13:37:53 +03004037
Gleb Natapov79729952010-03-18 15:20:24 +02004038 if (vcpu->arch.pio.count)
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004039 goto data_avail;
4040
Xiao Guangrong6f6fbe92011-09-22 16:55:10 +08004041 ret = emulator_pio_in_out(vcpu, size, port, val, count, true);
4042 if (ret) {
4043data_avail:
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004044 memcpy(val, vcpu->arch.pio_data, size * count);
Gleb Natapov79729952010-03-18 15:20:24 +02004045 vcpu->arch.pio.count = 0;
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004046 return 1;
4047 }
4048
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004049 return 0;
4050}
4051
Avi Kivityca1d4a92011-04-20 13:37:53 +03004052static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt,
4053 int size, unsigned short port,
4054 const void *val, unsigned int count)
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004055{
Avi Kivityca1d4a92011-04-20 13:37:53 +03004056 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
4057
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004058 memcpy(vcpu->arch.pio_data, val, size * count);
Xiao Guangrong6f6fbe92011-09-22 16:55:10 +08004059 return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004060}
4061
Carsten Ottebbd9b642007-10-30 18:44:21 +01004062static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
4063{
4064 return kvm_x86_ops->get_segment_base(vcpu, seg);
4065}
4066
Avi Kivity3cb16fe2011-04-20 15:38:44 +03004067static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004068{
Avi Kivity3cb16fe2011-04-20 15:38:44 +03004069 kvm_mmu_invlpg(emul_to_vcpu(ctxt), address);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004070}
4071
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004072int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu)
4073{
4074 if (!need_emulate_wbinvd(vcpu))
4075 return X86EMUL_CONTINUE;
4076
4077 if (kvm_x86_ops->has_wbinvd_exit()) {
Jan Kiszka2eec7342010-11-01 14:01:29 +01004078 int cpu = get_cpu();
4079
4080 cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004081 smp_call_function_many(vcpu->arch.wbinvd_dirty_mask,
4082 wbinvd_ipi, NULL, 1);
Jan Kiszka2eec7342010-11-01 14:01:29 +01004083 put_cpu();
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004084 cpumask_clear(vcpu->arch.wbinvd_dirty_mask);
Jan Kiszka2eec7342010-11-01 14:01:29 +01004085 } else
4086 wbinvd();
Sheng Yangf5f48ee2010-06-30 12:25:15 +08004087 return X86EMUL_CONTINUE;
4088}
4089EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd);
4090
Avi Kivitybcaf5cc2011-04-20 15:53:23 +03004091static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt)
4092{
4093 kvm_emulate_wbinvd(emul_to_vcpu(ctxt));
4094}
4095
Avi Kivity717746e2011-04-20 13:37:53 +03004096int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004097{
Avi Kivity717746e2011-04-20 13:37:53 +03004098 return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004099}
4100
Avi Kivity717746e2011-04-20 13:37:53 +03004101int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004102{
Gleb Natapov338dbc92010-04-28 19:15:32 +03004103
Avi Kivity717746e2011-04-20 13:37:53 +03004104 return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004105}
4106
Gleb Natapov52a46612010-03-18 15:20:03 +02004107static u64 mk_cr_64(u64 curr_cr, u32 new_val)
4108{
4109 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
4110}
4111
Avi Kivity717746e2011-04-20 13:37:53 +03004112static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr)
Gleb Natapov52a46612010-03-18 15:20:03 +02004113{
Avi Kivity717746e2011-04-20 13:37:53 +03004114 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov52a46612010-03-18 15:20:03 +02004115 unsigned long value;
4116
4117 switch (cr) {
4118 case 0:
4119 value = kvm_read_cr0(vcpu);
4120 break;
4121 case 2:
4122 value = vcpu->arch.cr2;
4123 break;
4124 case 3:
Avi Kivity9f8fe502010-12-05 17:30:00 +02004125 value = kvm_read_cr3(vcpu);
Gleb Natapov52a46612010-03-18 15:20:03 +02004126 break;
4127 case 4:
4128 value = kvm_read_cr4(vcpu);
4129 break;
4130 case 8:
4131 value = kvm_get_cr8(vcpu);
4132 break;
4133 default:
Christoffer Dalla737f252012-06-03 21:17:48 +03004134 kvm_err("%s: unexpected cr %u\n", __func__, cr);
Gleb Natapov52a46612010-03-18 15:20:03 +02004135 return 0;
4136 }
4137
4138 return value;
4139}
4140
Avi Kivity717746e2011-04-20 13:37:53 +03004141static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val)
Gleb Natapov52a46612010-03-18 15:20:03 +02004142{
Avi Kivity717746e2011-04-20 13:37:53 +03004143 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov0f122442010-04-28 19:15:31 +03004144 int res = 0;
4145
Gleb Natapov52a46612010-03-18 15:20:03 +02004146 switch (cr) {
4147 case 0:
Avi Kivity49a9b072010-06-10 17:02:14 +03004148 res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
Gleb Natapov52a46612010-03-18 15:20:03 +02004149 break;
4150 case 2:
4151 vcpu->arch.cr2 = val;
4152 break;
4153 case 3:
Avi Kivity23902182010-06-10 17:02:16 +03004154 res = kvm_set_cr3(vcpu, val);
Gleb Natapov52a46612010-03-18 15:20:03 +02004155 break;
4156 case 4:
Avi Kivitya83b29c2010-06-10 17:02:15 +03004157 res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
Gleb Natapov52a46612010-03-18 15:20:03 +02004158 break;
4159 case 8:
Andre Przywaraeea1cff2010-12-21 11:12:00 +01004160 res = kvm_set_cr8(vcpu, val);
Gleb Natapov52a46612010-03-18 15:20:03 +02004161 break;
4162 default:
Christoffer Dalla737f252012-06-03 21:17:48 +03004163 kvm_err("%s: unexpected cr %u\n", __func__, cr);
Gleb Natapov0f122442010-04-28 19:15:31 +03004164 res = -1;
Gleb Natapov52a46612010-03-18 15:20:03 +02004165 }
Gleb Natapov0f122442010-04-28 19:15:31 +03004166
4167 return res;
Gleb Natapov52a46612010-03-18 15:20:03 +02004168}
4169
Kevin Wolf4cee4792012-02-08 14:34:41 +01004170static void emulator_set_rflags(struct x86_emulate_ctxt *ctxt, ulong val)
4171{
4172 kvm_set_rflags(emul_to_vcpu(ctxt), val);
4173}
4174
Avi Kivity717746e2011-04-20 13:37:53 +03004175static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt)
Gleb Natapov9c537242010-03-18 15:20:05 +02004176{
Avi Kivity717746e2011-04-20 13:37:53 +03004177 return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt));
Gleb Natapov9c537242010-03-18 15:20:05 +02004178}
4179
Avi Kivity4bff1e862011-04-20 13:37:53 +03004180static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004181{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004182 kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt);
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004183}
4184
Avi Kivity4bff1e862011-04-20 13:37:53 +03004185static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
Mohammed Gamal160ce1f2010-08-04 05:44:24 +03004186{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004187 kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt);
Mohammed Gamal160ce1f2010-08-04 05:44:24 +03004188}
4189
Avi Kivity1ac9d0c2011-04-20 15:12:00 +03004190static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
4191{
4192 kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt);
4193}
4194
4195static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
4196{
4197 kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt);
4198}
4199
Avi Kivity4bff1e862011-04-20 13:37:53 +03004200static unsigned long emulator_get_cached_segment_base(
4201 struct x86_emulate_ctxt *ctxt, int seg)
Gleb Natapov5951c442010-04-28 19:15:29 +03004202{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004203 return get_segment_base(emul_to_vcpu(ctxt), seg);
Gleb Natapov5951c442010-04-28 19:15:29 +03004204}
4205
Avi Kivity1aa36612011-04-27 13:20:30 +03004206static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector,
4207 struct desc_struct *desc, u32 *base3,
4208 int seg)
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004209{
4210 struct kvm_segment var;
4211
Avi Kivity4bff1e862011-04-20 13:37:53 +03004212 kvm_get_segment(emul_to_vcpu(ctxt), &var, seg);
Avi Kivity1aa36612011-04-27 13:20:30 +03004213 *selector = var.selector;
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004214
4215 if (var.unusable)
4216 return false;
4217
4218 if (var.g)
4219 var.limit >>= 12;
4220 set_desc_limit(desc, var.limit);
4221 set_desc_base(desc, (unsigned long)var.base);
Gleb Natapov5601d052011-03-07 14:55:06 +02004222#ifdef CONFIG_X86_64
4223 if (base3)
4224 *base3 = var.base >> 32;
4225#endif
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004226 desc->type = var.type;
4227 desc->s = var.s;
4228 desc->dpl = var.dpl;
4229 desc->p = var.present;
4230 desc->avl = var.avl;
4231 desc->l = var.l;
4232 desc->d = var.db;
4233 desc->g = var.g;
4234
4235 return true;
4236}
4237
Avi Kivity1aa36612011-04-27 13:20:30 +03004238static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector,
4239 struct desc_struct *desc, u32 base3,
4240 int seg)
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004241{
Avi Kivity4bff1e862011-04-20 13:37:53 +03004242 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004243 struct kvm_segment var;
4244
Avi Kivity1aa36612011-04-27 13:20:30 +03004245 var.selector = selector;
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004246 var.base = get_desc_base(desc);
Gleb Natapov5601d052011-03-07 14:55:06 +02004247#ifdef CONFIG_X86_64
4248 var.base |= ((u64)base3) << 32;
4249#endif
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004250 var.limit = get_desc_limit(desc);
4251 if (desc->g)
4252 var.limit = (var.limit << 12) | 0xfff;
4253 var.type = desc->type;
4254 var.present = desc->p;
4255 var.dpl = desc->dpl;
4256 var.db = desc->d;
4257 var.s = desc->s;
4258 var.l = desc->l;
4259 var.g = desc->g;
4260 var.avl = desc->avl;
4261 var.present = desc->p;
4262 var.unusable = !var.present;
4263 var.padding = 0;
4264
4265 kvm_set_segment(vcpu, &var, seg);
4266 return;
4267}
4268
Avi Kivity717746e2011-04-20 13:37:53 +03004269static int emulator_get_msr(struct x86_emulate_ctxt *ctxt,
4270 u32 msr_index, u64 *pdata)
4271{
4272 return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata);
4273}
4274
4275static int emulator_set_msr(struct x86_emulate_ctxt *ctxt,
4276 u32 msr_index, u64 data)
4277{
4278 return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data);
4279}
4280
Avi Kivity222d21a2011-11-10 14:57:30 +02004281static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt,
4282 u32 pmc, u64 *pdata)
4283{
4284 return kvm_pmu_read_pmc(emul_to_vcpu(ctxt), pmc, pdata);
4285}
4286
Avi Kivity6c3287f2011-04-20 15:43:05 +03004287static void emulator_halt(struct x86_emulate_ctxt *ctxt)
4288{
4289 emul_to_vcpu(ctxt)->arch.halt_request = 1;
4290}
4291
Avi Kivity5037f6f2011-03-28 16:53:59 +02004292static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt)
4293{
4294 preempt_disable();
Avi Kivity5197b802011-04-20 15:55:40 +03004295 kvm_load_guest_fpu(emul_to_vcpu(ctxt));
Avi Kivity5037f6f2011-03-28 16:53:59 +02004296 /*
4297 * CR0.TS may reference the host fpu state, not the guest fpu state,
4298 * so it may be clear at this point.
4299 */
4300 clts();
4301}
4302
4303static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt)
4304{
4305 preempt_enable();
4306}
4307
Avi Kivity29535382011-04-20 13:37:53 +03004308static int emulator_intercept(struct x86_emulate_ctxt *ctxt,
Joerg Roedel8a76d7f2011-04-04 12:39:27 +02004309 struct x86_instruction_info *info,
Avi Kivityc4f035c2011-04-04 12:39:22 +02004310 enum x86_intercept_stage stage)
4311{
Avi Kivity29535382011-04-20 13:37:53 +03004312 return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage);
Avi Kivityc4f035c2011-04-04 12:39:22 +02004313}
4314
Avi Kivity0017f932012-06-07 14:10:16 +03004315static void emulator_get_cpuid(struct x86_emulate_ctxt *ctxt,
Stephan Bärwolfbdb42f52012-01-12 16:43:03 +01004316 u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
4317{
Avi Kivity0017f932012-06-07 14:10:16 +03004318 kvm_cpuid(emul_to_vcpu(ctxt), eax, ebx, ecx, edx);
Stephan Bärwolfbdb42f52012-01-12 16:43:03 +01004319}
4320
Avi Kivitydd856ef2012-08-27 23:46:17 +03004321static ulong emulator_read_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg)
4322{
4323 return kvm_register_read(emul_to_vcpu(ctxt), reg);
4324}
4325
4326static void emulator_write_gpr(struct x86_emulate_ctxt *ctxt, unsigned reg, ulong val)
4327{
4328 kvm_register_write(emul_to_vcpu(ctxt), reg, val);
4329}
4330
Mathias Krause0225fb52012-08-30 01:30:16 +02004331static const struct x86_emulate_ops emulate_ops = {
Avi Kivitydd856ef2012-08-27 23:46:17 +03004332 .read_gpr = emulator_read_gpr,
4333 .write_gpr = emulator_write_gpr,
Gleb Natapov1871c602010-02-10 14:21:32 +02004334 .read_std = kvm_read_guest_virt_system,
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004335 .write_std = kvm_write_guest_virt_system,
Gleb Natapov1871c602010-02-10 14:21:32 +02004336 .fetch = kvm_fetch_guest_virt,
Carsten Ottebbd9b642007-10-30 18:44:21 +01004337 .read_emulated = emulator_read_emulated,
4338 .write_emulated = emulator_write_emulated,
4339 .cmpxchg_emulated = emulator_cmpxchg_emulated,
Avi Kivity3cb16fe2011-04-20 15:38:44 +03004340 .invlpg = emulator_invlpg,
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004341 .pio_in_emulated = emulator_pio_in_emulated,
4342 .pio_out_emulated = emulator_pio_out_emulated,
Avi Kivity1aa36612011-04-27 13:20:30 +03004343 .get_segment = emulator_get_segment,
4344 .set_segment = emulator_set_segment,
Gleb Natapov5951c442010-04-28 19:15:29 +03004345 .get_cached_segment_base = emulator_get_cached_segment_base,
Gleb Natapov2dafc6c2010-03-18 15:20:16 +02004346 .get_gdt = emulator_get_gdt,
Mohammed Gamal160ce1f2010-08-04 05:44:24 +03004347 .get_idt = emulator_get_idt,
Avi Kivity1ac9d0c2011-04-20 15:12:00 +03004348 .set_gdt = emulator_set_gdt,
4349 .set_idt = emulator_set_idt,
Gleb Natapov52a46612010-03-18 15:20:03 +02004350 .get_cr = emulator_get_cr,
4351 .set_cr = emulator_set_cr,
Kevin Wolf4cee4792012-02-08 14:34:41 +01004352 .set_rflags = emulator_set_rflags,
Gleb Natapov9c537242010-03-18 15:20:05 +02004353 .cpl = emulator_get_cpl,
Gleb Natapov35aa5372010-04-28 19:15:27 +03004354 .get_dr = emulator_get_dr,
4355 .set_dr = emulator_set_dr,
Avi Kivity717746e2011-04-20 13:37:53 +03004356 .set_msr = emulator_set_msr,
4357 .get_msr = emulator_get_msr,
Avi Kivity222d21a2011-11-10 14:57:30 +02004358 .read_pmc = emulator_read_pmc,
Avi Kivity6c3287f2011-04-20 15:43:05 +03004359 .halt = emulator_halt,
Avi Kivitybcaf5cc2011-04-20 15:53:23 +03004360 .wbinvd = emulator_wbinvd,
Avi Kivityd6aa1002011-04-20 15:47:13 +03004361 .fix_hypercall = emulator_fix_hypercall,
Avi Kivity5037f6f2011-03-28 16:53:59 +02004362 .get_fpu = emulator_get_fpu,
4363 .put_fpu = emulator_put_fpu,
Avi Kivityc4f035c2011-04-04 12:39:22 +02004364 .intercept = emulator_intercept,
Stephan Bärwolfbdb42f52012-01-12 16:43:03 +01004365 .get_cpuid = emulator_get_cpuid,
Carsten Ottebbd9b642007-10-30 18:44:21 +01004366};
4367
Gleb Natapov95cb2292010-04-28 19:15:43 +03004368static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask)
4369{
4370 u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask);
4371 /*
4372 * an sti; sti; sequence only disable interrupts for the first
4373 * instruction. So, if the last instruction, be it emulated or
4374 * not, left the system with the INT_STI flag enabled, it
4375 * means that the last instruction is an sti. We should not
4376 * leave the flag on in this case. The same goes for mov ss
4377 */
4378 if (!(int_shadow & mask))
4379 kvm_x86_ops->set_interrupt_shadow(vcpu, mask);
4380}
4381
Gleb Natapov54b84862010-04-28 19:15:44 +03004382static void inject_emulated_exception(struct kvm_vcpu *vcpu)
4383{
4384 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Avi Kivityda9cb572010-11-22 17:53:21 +02004385 if (ctxt->exception.vector == PF_VECTOR)
Avi Kivity6389ee92010-11-29 16:12:30 +02004386 kvm_propagate_fault(vcpu, &ctxt->exception);
Avi Kivityda9cb572010-11-22 17:53:21 +02004387 else if (ctxt->exception.error_code_valid)
4388 kvm_queue_exception_e(vcpu, ctxt->exception.vector,
4389 ctxt->exception.error_code);
Gleb Natapov54b84862010-04-28 19:15:44 +03004390 else
Avi Kivityda9cb572010-11-22 17:53:21 +02004391 kvm_queue_exception(vcpu, ctxt->exception.vector);
Gleb Natapov54b84862010-04-28 19:15:44 +03004392}
4393
Avi Kivitydd856ef2012-08-27 23:46:17 +03004394static void init_decode_cache(struct x86_emulate_ctxt *ctxt)
Takuya Yoshikawab5c9ff72011-05-25 11:09:38 +09004395{
Avi Kivity9dac77f2011-06-01 15:34:25 +03004396 memset(&ctxt->twobyte, 0,
Avi Kivitydd856ef2012-08-27 23:46:17 +03004397 (void *)&ctxt->_regs - (void *)&ctxt->twobyte);
Takuya Yoshikawab5c9ff72011-05-25 11:09:38 +09004398
Avi Kivity9dac77f2011-06-01 15:34:25 +03004399 ctxt->fetch.start = 0;
4400 ctxt->fetch.end = 0;
4401 ctxt->io_read.pos = 0;
4402 ctxt->io_read.end = 0;
4403 ctxt->mem_read.pos = 0;
4404 ctxt->mem_read.end = 0;
Takuya Yoshikawab5c9ff72011-05-25 11:09:38 +09004405}
4406
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004407static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
4408{
Takuya Yoshikawaadf52232011-05-25 11:06:16 +09004409 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004410 int cs_db, cs_l;
4411
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004412 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4413
Takuya Yoshikawaadf52232011-05-25 11:06:16 +09004414 ctxt->eflags = kvm_get_rflags(vcpu);
4415 ctxt->eip = kvm_rip_read(vcpu);
4416 ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
4417 (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 :
4418 cs_l ? X86EMUL_MODE_PROT64 :
4419 cs_db ? X86EMUL_MODE_PROT32 :
4420 X86EMUL_MODE_PROT16;
4421 ctxt->guest_mode = is_guest_mode(vcpu);
4422
Avi Kivitydd856ef2012-08-27 23:46:17 +03004423 init_decode_cache(ctxt);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004424 vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004425}
4426
Serge E. Hallyn71f98332011-04-13 09:12:54 -05004427int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
Mohammed Gamal63995652010-09-19 14:34:06 +02004428{
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004429 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Mohammed Gamal63995652010-09-19 14:34:06 +02004430 int ret;
4431
4432 init_emulate_ctxt(vcpu);
4433
Avi Kivity9dac77f2011-06-01 15:34:25 +03004434 ctxt->op_bytes = 2;
4435 ctxt->ad_bytes = 2;
4436 ctxt->_eip = ctxt->eip + inc_eip;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004437 ret = emulate_int_real(ctxt, irq);
Mohammed Gamal63995652010-09-19 14:34:06 +02004438
4439 if (ret != X86EMUL_CONTINUE)
4440 return EMULATE_FAIL;
4441
Avi Kivity9dac77f2011-06-01 15:34:25 +03004442 ctxt->eip = ctxt->_eip;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004443 kvm_rip_write(vcpu, ctxt->eip);
4444 kvm_set_rflags(vcpu, ctxt->eflags);
Mohammed Gamal63995652010-09-19 14:34:06 +02004445
4446 if (irq == NMI_VECTOR)
Avi Kivity7460fb4a2011-09-20 13:43:14 +03004447 vcpu->arch.nmi_pending = 0;
Mohammed Gamal63995652010-09-19 14:34:06 +02004448 else
4449 vcpu->arch.interrupt.pending = false;
4450
4451 return EMULATE_DONE;
4452}
4453EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);
4454
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004455static int handle_emulation_failure(struct kvm_vcpu *vcpu)
4456{
Joerg Roedelfc3a9152010-11-29 17:51:49 +01004457 int r = EMULATE_DONE;
4458
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004459 ++vcpu->stat.insn_emulation_fail;
4460 trace_kvm_emulate_insn_failed(vcpu);
Joerg Roedelfc3a9152010-11-29 17:51:49 +01004461 if (!is_guest_mode(vcpu)) {
4462 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4463 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
4464 vcpu->run->internal.ndata = 0;
4465 r = EMULATE_FAIL;
4466 }
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004467 kvm_queue_exception(vcpu, UD_VECTOR);
Joerg Roedelfc3a9152010-11-29 17:51:49 +01004468
4469 return r;
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004470}
4471
Gleb Natapova6f177e2010-07-08 12:41:12 +03004472static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
4473{
4474 gpa_t gpa;
Xiao Guangrong8e3d9d02012-08-21 10:57:42 +08004475 pfn_t pfn;
Gleb Natapova6f177e2010-07-08 12:41:12 +03004476
Gleb Natapov68be0802010-07-14 19:05:45 +03004477 if (tdp_enabled)
4478 return false;
4479
Gleb Natapova6f177e2010-07-08 12:41:12 +03004480 /*
4481 * if emulation was due to access to shadowed page table
Guo Chao4a969982012-06-28 15:17:27 +08004482 * and it failed try to unshadow page and re-enter the
Gleb Natapova6f177e2010-07-08 12:41:12 +03004483 * guest to let CPU execute the instruction.
4484 */
4485 if (kvm_mmu_unprotect_page_virt(vcpu, gva))
4486 return true;
4487
4488 gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL);
4489
4490 if (gpa == UNMAPPED_GVA)
4491 return true; /* let cpu generate fault */
4492
Xiao Guangrong8e3d9d02012-08-21 10:57:42 +08004493 /*
4494 * Do not retry the unhandleable instruction if it faults on the
4495 * readonly host memory, otherwise it will goto a infinite loop:
4496 * retry instruction -> write #PF -> emulation fail -> retry
4497 * instruction -> ...
4498 */
4499 pfn = gfn_to_pfn(vcpu->kvm, gpa_to_gfn(gpa));
Xiao Guangrong81c52c52012-10-16 20:10:59 +08004500 if (!is_error_noslot_pfn(pfn)) {
Xiao Guangrong8e3d9d02012-08-21 10:57:42 +08004501 kvm_release_pfn_clean(pfn);
Gleb Natapova6f177e2010-07-08 12:41:12 +03004502 return true;
Xiao Guangrong8e3d9d02012-08-21 10:57:42 +08004503 }
Gleb Natapova6f177e2010-07-08 12:41:12 +03004504
4505 return false;
4506}
4507
Xiao Guangrong1cb3f3a2011-09-22 17:02:48 +08004508static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
4509 unsigned long cr2, int emulation_type)
4510{
4511 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
4512 unsigned long last_retry_eip, last_retry_addr, gpa = cr2;
4513
4514 last_retry_eip = vcpu->arch.last_retry_eip;
4515 last_retry_addr = vcpu->arch.last_retry_addr;
4516
4517 /*
4518 * If the emulation is caused by #PF and it is non-page_table
4519 * writing instruction, it means the VM-EXIT is caused by shadow
4520 * page protected, we can zap the shadow page and retry this
4521 * instruction directly.
4522 *
4523 * Note: if the guest uses a non-page-table modifying instruction
4524 * on the PDE that points to the instruction, then we will unmap
4525 * the instruction and go to an infinite loop. So, we cache the
4526 * last retried eip and the last fault address, if we meet the eip
4527 * and the address again, we can break out of the potential infinite
4528 * loop.
4529 */
4530 vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0;
4531
4532 if (!(emulation_type & EMULTYPE_RETRY))
4533 return false;
4534
4535 if (x86_page_table_writing_insn(ctxt))
4536 return false;
4537
4538 if (ctxt->eip == last_retry_eip && last_retry_addr == cr2)
4539 return false;
4540
4541 vcpu->arch.last_retry_eip = ctxt->eip;
4542 vcpu->arch.last_retry_addr = cr2;
4543
4544 if (!vcpu->arch.mmu.direct_map)
4545 gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL);
4546
4547 kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
4548
4549 return true;
4550}
4551
Gleb Natapov716d51a2012-09-03 15:24:26 +03004552static int complete_emulated_mmio(struct kvm_vcpu *vcpu);
4553static int complete_emulated_pio(struct kvm_vcpu *vcpu);
4554
Andre Przywara51d8b662010-12-21 11:12:02 +01004555int x86_emulate_instruction(struct kvm_vcpu *vcpu,
4556 unsigned long cr2,
Andre Przywaradc25e892010-12-21 11:12:07 +01004557 int emulation_type,
4558 void *insn,
4559 int insn_len)
Carsten Ottebbd9b642007-10-30 18:44:21 +01004560{
Gleb Natapov95cb2292010-04-28 19:15:43 +03004561 int r;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004562 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004563 bool writeback = true;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004564
Avi Kivity26eef702008-07-03 14:59:22 +03004565 kvm_clear_exception_queue(vcpu);
Gleb Natapov8d7d81022011-04-12 12:36:21 +03004566
Sheng Yang571008d2008-01-02 14:49:22 +08004567 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
Mohammed Gamal8ec47222010-08-16 00:47:01 +03004568 init_emulate_ctxt(vcpu);
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004569 ctxt->interruptibility = 0;
4570 ctxt->have_exception = false;
4571 ctxt->perm_ok = false;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004572
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004573 ctxt->only_vendor_specific_insn
Avi Kivity40059962011-02-01 16:32:04 +02004574 = emulation_type & EMULTYPE_TRAP_UD;
4575
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004576 r = x86_decode_insn(ctxt, insn, insn_len);
Joerg Roedeld47f00a2010-09-10 17:30:56 +02004577
Avi Kivitye46479f2010-04-11 13:05:16 +03004578 trace_kvm_emulate_insn_start(vcpu);
Avi Kivityf2b57562007-11-18 15:17:51 +02004579 ++vcpu->stat.insn_emulation;
Takuya Yoshikawa1d2887e2011-07-30 18:03:34 +09004580 if (r != EMULATION_OK) {
Avi Kivity40059962011-02-01 16:32:04 +02004581 if (emulation_type & EMULTYPE_TRAP_UD)
4582 return EMULATE_FAIL;
Gleb Natapova6f177e2010-07-08 12:41:12 +03004583 if (reexecute_instruction(vcpu, cr2))
Carsten Ottebbd9b642007-10-30 18:44:21 +01004584 return EMULATE_DONE;
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004585 if (emulation_type & EMULTYPE_SKIP)
4586 return EMULATE_FAIL;
4587 return handle_emulation_failure(vcpu);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004588 }
4589 }
4590
Gleb Natapovba8afb62009-04-12 13:36:57 +03004591 if (emulation_type & EMULTYPE_SKIP) {
Avi Kivity9dac77f2011-06-01 15:34:25 +03004592 kvm_rip_write(vcpu, ctxt->_eip);
Gleb Natapovba8afb62009-04-12 13:36:57 +03004593 return EMULATE_DONE;
4594 }
4595
Xiao Guangrong1cb3f3a2011-09-22 17:02:48 +08004596 if (retry_instruction(ctxt, cr2, emulation_type))
4597 return EMULATE_DONE;
4598
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004599 /* this is needed for vmware backdoor interface to work since it
Gleb Natapov4d2179e2010-04-28 19:15:42 +03004600 changes registers values during IO operation */
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004601 if (vcpu->arch.emulate_regs_need_sync_from_vcpu) {
4602 vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
Avi Kivitydd856ef2012-08-27 23:46:17 +03004603 emulator_invalidate_register_cache(ctxt);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004604 }
Gleb Natapov4d2179e2010-04-28 19:15:42 +03004605
Gleb Natapov5cd21912010-03-18 15:20:26 +02004606restart:
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004607 r = x86_emulate_insn(ctxt);
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03004608
Joerg Roedel775fde82011-04-04 12:39:24 +02004609 if (r == EMULATION_INTERCEPTED)
4610 return EMULATE_DONE;
4611
Gleb Natapovd2ddd1c2010-08-25 12:47:43 +03004612 if (r == EMULATION_FAILED) {
Gleb Natapova6f177e2010-07-08 12:41:12 +03004613 if (reexecute_instruction(vcpu, cr2))
Gleb Natapovc3cd7ff2010-04-28 19:15:35 +03004614 return EMULATE_DONE;
4615
Gleb Natapov6d77dbf2010-05-10 11:16:56 +03004616 return handle_emulation_failure(vcpu);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004617 }
4618
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004619 if (ctxt->have_exception) {
Gleb Natapove85d28f2010-07-29 15:11:52 +03004620 inject_emulated_exception(vcpu);
Gleb Natapovd2ddd1c2010-08-25 12:47:43 +03004621 r = EMULATE_DONE;
4622 } else if (vcpu->arch.pio.count) {
Gleb Natapove85d28f2010-07-29 15:11:52 +03004623 if (!vcpu->arch.pio.in)
4624 vcpu->arch.pio.count = 0;
Gleb Natapov716d51a2012-09-03 15:24:26 +03004625 else {
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004626 writeback = false;
Gleb Natapov716d51a2012-09-03 15:24:26 +03004627 vcpu->arch.complete_userspace_io = complete_emulated_pio;
4628 }
Gleb Natapove85d28f2010-07-29 15:11:52 +03004629 r = EMULATE_DO_MMIO;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004630 } else if (vcpu->mmio_needed) {
4631 if (!vcpu->mmio_is_write)
4632 writeback = false;
Gleb Natapove85d28f2010-07-29 15:11:52 +03004633 r = EMULATE_DO_MMIO;
Gleb Natapov716d51a2012-09-03 15:24:26 +03004634 vcpu->arch.complete_userspace_io = complete_emulated_mmio;
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004635 } else if (r == EMULATION_RESTART)
Gleb Natapove85d28f2010-07-29 15:11:52 +03004636 goto restart;
Gleb Natapovd2ddd1c2010-08-25 12:47:43 +03004637 else
4638 r = EMULATE_DONE;
Gleb Natapove85d28f2010-07-29 15:11:52 +03004639
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004640 if (writeback) {
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004641 toggle_interruptibility(vcpu, ctxt->interruptibility);
4642 kvm_set_rflags(vcpu, ctxt->eflags);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004643 kvm_make_request(KVM_REQ_EVENT, vcpu);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004644 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09004645 kvm_rip_write(vcpu, ctxt->eip);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02004646 } else
4647 vcpu->arch.emulate_regs_need_sync_to_vcpu = true;
Gleb Natapov3457e412010-04-28 19:15:38 +03004648
Gleb Natapove85d28f2010-07-29 15:11:52 +03004649 return r;
Carsten Ottebbd9b642007-10-30 18:44:21 +01004650}
Andre Przywara51d8b662010-12-21 11:12:02 +01004651EXPORT_SYMBOL_GPL(x86_emulate_instruction);
Carsten Ottebbd9b642007-10-30 18:44:21 +01004652
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004653int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
Carsten Ottede7d7892007-10-30 18:44:25 +01004654{
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004655 unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
Avi Kivityca1d4a92011-04-20 13:37:53 +03004656 int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt,
4657 size, port, &val, 1);
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004658 /* do not return to emulator after return from userspace */
Gleb Natapov79729952010-03-18 15:20:24 +02004659 vcpu->arch.pio.count = 0;
Izik Eidus0f346072008-12-29 01:42:20 +02004660 return ret;
Carsten Ottede7d7892007-10-30 18:44:25 +01004661}
Gleb Natapovcf8f70b2010-03-18 15:20:23 +02004662EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
Carsten Ottede7d7892007-10-30 18:44:25 +01004663
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004664static void tsc_bad(void *info)
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004665{
Tejun Heo0a3aee02010-12-18 16:28:55 +01004666 __this_cpu_write(cpu_tsc_khz, 0);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004667}
4668
4669static void tsc_khz_changed(void *data)
4670{
4671 struct cpufreq_freqs *freq = data;
4672 unsigned long khz = 0;
4673
4674 if (data)
4675 khz = freq->new;
4676 else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4677 khz = cpufreq_quick_get(raw_smp_processor_id());
4678 if (!khz)
4679 khz = tsc_khz;
Tejun Heo0a3aee02010-12-18 16:28:55 +01004680 __this_cpu_write(cpu_tsc_khz, khz);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004681}
4682
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004683static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
4684 void *data)
4685{
4686 struct cpufreq_freqs *freq = data;
4687 struct kvm *kvm;
4688 struct kvm_vcpu *vcpu;
4689 int i, send_ipi = 0;
4690
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004691 /*
4692 * We allow guests to temporarily run on slowing clocks,
4693 * provided we notify them after, or to run on accelerating
4694 * clocks, provided we notify them before. Thus time never
4695 * goes backwards.
4696 *
4697 * However, we have a problem. We can't atomically update
4698 * the frequency of a given CPU from this function; it is
4699 * merely a notifier, which can be called from any CPU.
4700 * Changing the TSC frequency at arbitrary points in time
4701 * requires a recomputation of local variables related to
4702 * the TSC for each VCPU. We must flag these local variables
4703 * to be updated and be sure the update takes place with the
4704 * new frequency before any guests proceed.
4705 *
4706 * Unfortunately, the combination of hotplug CPU and frequency
4707 * change creates an intractable locking scenario; the order
4708 * of when these callouts happen is undefined with respect to
4709 * CPU hotplug, and they can race with each other. As such,
4710 * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is
4711 * undefined; you can actually have a CPU frequency change take
4712 * place in between the computation of X and the setting of the
4713 * variable. To protect against this problem, all updates of
4714 * the per_cpu tsc_khz variable are done in an interrupt
4715 * protected IPI, and all callers wishing to update the value
4716 * must wait for a synchronous IPI to complete (which is trivial
4717 * if the caller is on the CPU already). This establishes the
4718 * necessary total order on variable updates.
4719 *
4720 * Note that because a guest time update may take place
4721 * anytime after the setting of the VCPU's request bit, the
4722 * correct TSC value must be set before the request. However,
4723 * to ensure the update actually makes it to any guest which
4724 * starts running in hardware virtualization between the set
4725 * and the acquisition of the spinlock, we must also ping the
4726 * CPU after setting the request bit.
4727 *
4728 */
4729
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004730 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
4731 return 0;
4732 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
4733 return 0;
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004734
4735 smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004736
Jan Kiszkae935b832011-02-08 12:55:33 +01004737 raw_spin_lock(&kvm_lock);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004738 list_for_each_entry(kvm, &vm_list, vm_list) {
Gleb Natapov988a2ca2009-06-09 15:56:29 +03004739 kvm_for_each_vcpu(i, vcpu, kvm) {
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004740 if (vcpu->cpu != freq->cpu)
4741 continue;
Zachary Amsdenc2855452010-09-18 14:38:15 -10004742 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004743 if (vcpu->cpu != smp_processor_id())
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004744 send_ipi = 1;
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004745 }
4746 }
Jan Kiszkae935b832011-02-08 12:55:33 +01004747 raw_spin_unlock(&kvm_lock);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004748
4749 if (freq->old < freq->new && send_ipi) {
4750 /*
4751 * We upscale the frequency. Must make the guest
4752 * doesn't see old kvmclock values while running with
4753 * the new frequency, otherwise we risk the guest sees
4754 * time go backwards.
4755 *
4756 * In case we update the frequency for another cpu
4757 * (which might be in guest context) send an interrupt
4758 * to kick the cpu out of guest context. Next time
4759 * guest context is entered kvmclock will be updated,
4760 * so the guest will not see stale values.
4761 */
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004762 smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004763 }
4764 return 0;
4765}
4766
4767static struct notifier_block kvmclock_cpufreq_notifier_block = {
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004768 .notifier_call = kvmclock_cpufreq_notifier
4769};
4770
4771static int kvmclock_cpu_notifier(struct notifier_block *nfb,
4772 unsigned long action, void *hcpu)
4773{
4774 unsigned int cpu = (unsigned long)hcpu;
4775
4776 switch (action) {
4777 case CPU_ONLINE:
4778 case CPU_DOWN_FAILED:
4779 smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
4780 break;
4781 case CPU_DOWN_PREPARE:
4782 smp_call_function_single(cpu, tsc_bad, NULL, 1);
4783 break;
4784 }
4785 return NOTIFY_OK;
4786}
4787
4788static struct notifier_block kvmclock_cpu_notifier_block = {
4789 .notifier_call = kvmclock_cpu_notifier,
4790 .priority = -INT_MAX
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004791};
4792
Zachary Amsdenb820cc02009-09-29 11:38:34 -10004793static void kvm_timer_init(void)
4794{
4795 int cpu;
4796
Zachary Amsdenc2855452010-09-18 14:38:15 -10004797 max_tsc_khz = tsc_khz;
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004798 register_hotcpu_notifier(&kvmclock_cpu_notifier_block);
Zachary Amsdenb820cc02009-09-29 11:38:34 -10004799 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
Zachary Amsdenc2855452010-09-18 14:38:15 -10004800#ifdef CONFIG_CPU_FREQ
4801 struct cpufreq_policy policy;
4802 memset(&policy, 0, sizeof(policy));
Avi Kivity3e26f232010-12-16 12:16:34 +02004803 cpu = get_cpu();
4804 cpufreq_get_policy(&policy, cpu);
Zachary Amsdenc2855452010-09-18 14:38:15 -10004805 if (policy.cpuinfo.max_freq)
4806 max_tsc_khz = policy.cpuinfo.max_freq;
Avi Kivity3e26f232010-12-16 12:16:34 +02004807 put_cpu();
Zachary Amsdenc2855452010-09-18 14:38:15 -10004808#endif
Zachary Amsdenb820cc02009-09-29 11:38:34 -10004809 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
4810 CPUFREQ_TRANSITION_NOTIFIER);
4811 }
Zachary Amsdenc2855452010-09-18 14:38:15 -10004812 pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004813 for_each_online_cpu(cpu)
4814 smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
Zachary Amsdenb820cc02009-09-29 11:38:34 -10004815}
4816
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004817static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
4818
Gleb Natapovf5132b02011-11-10 14:57:22 +02004819int kvm_is_in_guest(void)
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004820{
Alex,Shi086c9852011-10-20 15:34:01 +08004821 return __this_cpu_read(current_vcpu) != NULL;
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004822}
4823
4824static int kvm_is_user_mode(void)
4825{
4826 int user_mode = 3;
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08004827
Alex,Shi086c9852011-10-20 15:34:01 +08004828 if (__this_cpu_read(current_vcpu))
4829 user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu));
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08004830
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004831 return user_mode != 0;
4832}
4833
4834static unsigned long kvm_get_guest_ip(void)
4835{
4836 unsigned long ip = 0;
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08004837
Alex,Shi086c9852011-10-20 15:34:01 +08004838 if (__this_cpu_read(current_vcpu))
4839 ip = kvm_rip_read(__this_cpu_read(current_vcpu));
Zhang, Yanmindcf46b92010-04-20 10:13:58 +08004840
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004841 return ip;
4842}
4843
4844static struct perf_guest_info_callbacks kvm_guest_cbs = {
4845 .is_in_guest = kvm_is_in_guest,
4846 .is_user_mode = kvm_is_user_mode,
4847 .get_guest_ip = kvm_get_guest_ip,
4848};
4849
4850void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
4851{
Alex,Shi086c9852011-10-20 15:34:01 +08004852 __this_cpu_write(current_vcpu, vcpu);
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004853}
4854EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
4855
4856void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
4857{
Alex,Shi086c9852011-10-20 15:34:01 +08004858 __this_cpu_write(current_vcpu, NULL);
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004859}
4860EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
4861
Xiao Guangrongce88dec2011-07-12 03:33:44 +08004862static void kvm_set_mmio_spte_mask(void)
4863{
4864 u64 mask;
4865 int maxphyaddr = boot_cpu_data.x86_phys_bits;
4866
4867 /*
4868 * Set the reserved bits and the present bit of an paging-structure
4869 * entry to generate page fault with PFER.RSV = 1.
4870 */
4871 mask = ((1ull << (62 - maxphyaddr + 1)) - 1) << maxphyaddr;
4872 mask |= 1ull;
4873
4874#ifdef CONFIG_X86_64
4875 /*
4876 * If reserved bit is not supported, clear the present bit to disable
4877 * mmio page fault.
4878 */
4879 if (maxphyaddr == 52)
4880 mask &= ~1ull;
4881#endif
4882
4883 kvm_mmu_set_mmio_spte_mask(mask);
4884}
4885
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004886int kvm_arch_init(void *opaque)
Carsten Otte043405e2007-10-10 17:16:19 +02004887{
Zachary Amsdenb820cc02009-09-29 11:38:34 -10004888 int r;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004889 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
4890
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004891 if (kvm_x86_ops) {
4892 printk(KERN_ERR "kvm: already loaded the other module\n");
Zhang Xiantao56c6d282007-11-18 20:43:21 +08004893 r = -EEXIST;
4894 goto out;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004895 }
4896
4897 if (!ops->cpu_has_kvm_support()) {
4898 printk(KERN_ERR "kvm: no hardware support\n");
Zhang Xiantao56c6d282007-11-18 20:43:21 +08004899 r = -EOPNOTSUPP;
4900 goto out;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004901 }
4902 if (ops->disabled_by_bios()) {
4903 printk(KERN_ERR "kvm: disabled by bios\n");
Zhang Xiantao56c6d282007-11-18 20:43:21 +08004904 r = -EOPNOTSUPP;
4905 goto out;
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004906 }
4907
Avi Kivity97db56c2008-01-13 13:23:56 +02004908 r = kvm_mmu_module_init();
4909 if (r)
4910 goto out;
4911
Xiao Guangrongce88dec2011-07-12 03:33:44 +08004912 kvm_set_mmio_spte_mask();
Avi Kivity97db56c2008-01-13 13:23:56 +02004913 kvm_init_msr_list();
4914
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004915 kvm_x86_ops = ops;
Sheng Yang7b523452008-04-25 21:13:50 +08004916 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
Sheng Yang4b12f0d2009-04-27 20:35:42 +08004917 PT_DIRTY_MASK, PT64_NX_MASK, 0);
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004918
Zachary Amsdenb820cc02009-09-29 11:38:34 -10004919 kvm_timer_init();
Gerd Hoffmannc8076602009-02-04 17:52:04 +01004920
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004921 perf_register_guest_info_callbacks(&kvm_guest_cbs);
4922
Dexuan Cui2acf9232010-06-10 11:27:12 +08004923 if (cpu_has_xsave)
4924 host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
4925
Gleb Natapovc5cc4212012-08-05 15:58:30 +03004926 kvm_lapic_init();
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004927 return 0;
Zhang Xiantao56c6d282007-11-18 20:43:21 +08004928
4929out:
Zhang Xiantao56c6d282007-11-18 20:43:21 +08004930 return r;
Carsten Otte043405e2007-10-10 17:16:19 +02004931}
Hollis Blanchard8776e512007-10-31 17:24:24 -05004932
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004933void kvm_arch_exit(void)
4934{
Zhang, Yanminff9d07a2010-04-19 13:32:45 +08004935 perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
4936
Jan Kiszka888d2562009-04-17 19:24:58 +02004937 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4938 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
4939 CPUFREQ_TRANSITION_NOTIFIER);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10004940 unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block);
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004941 kvm_x86_ops = NULL;
Zhang Xiantao56c6d282007-11-18 20:43:21 +08004942 kvm_mmu_module_exit();
4943}
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08004944
Hollis Blanchard8776e512007-10-31 17:24:24 -05004945int kvm_emulate_halt(struct kvm_vcpu *vcpu)
4946{
4947 ++vcpu->stat.halt_exits;
4948 if (irqchip_in_kernel(vcpu->kvm)) {
Avi Kivitya4535292008-04-13 17:54:35 +03004949 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
Hollis Blanchard8776e512007-10-31 17:24:24 -05004950 return 1;
4951 } else {
4952 vcpu->run->exit_reason = KVM_EXIT_HLT;
4953 return 0;
4954 }
4955}
4956EXPORT_SYMBOL_GPL(kvm_emulate_halt);
4957
Gleb Natapov55cd8e52010-01-17 15:51:22 +02004958int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
4959{
4960 u64 param, ingpa, outgpa, ret;
4961 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
4962 bool fast, longmode;
4963 int cs_db, cs_l;
4964
4965 /*
4966 * hypercall generates UD from non zero cpl and real mode
4967 * per HYPER-V spec
4968 */
Avi Kivity3eeb3282010-01-21 15:31:48 +02004969 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
Gleb Natapov55cd8e52010-01-17 15:51:22 +02004970 kvm_queue_exception(vcpu, UD_VECTOR);
4971 return 0;
4972 }
4973
4974 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4975 longmode = is_long_mode(vcpu) && cs_l == 1;
4976
4977 if (!longmode) {
Gleb Natapovccd46932010-01-19 15:06:38 +02004978 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
4979 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
4980 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
4981 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
4982 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
4983 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
Gleb Natapov55cd8e52010-01-17 15:51:22 +02004984 }
4985#ifdef CONFIG_X86_64
4986 else {
4987 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
4988 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
4989 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
4990 }
4991#endif
4992
4993 code = param & 0xffff;
4994 fast = (param >> 16) & 0x1;
4995 rep_cnt = (param >> 32) & 0xfff;
4996 rep_idx = (param >> 48) & 0xfff;
4997
4998 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
4999
Gleb Natapovc25bc162010-01-17 15:51:24 +02005000 switch (code) {
5001 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
5002 kvm_vcpu_on_spin(vcpu);
5003 break;
5004 default:
5005 res = HV_STATUS_INVALID_HYPERCALL_CODE;
5006 break;
5007 }
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005008
5009 ret = res | (((u64)rep_done & 0xfff) << 32);
5010 if (longmode) {
5011 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
5012 } else {
5013 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
5014 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
5015 }
5016
5017 return 1;
5018}
5019
Hollis Blanchard8776e512007-10-31 17:24:24 -05005020int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
5021{
5022 unsigned long nr, a0, a1, a2, a3, ret;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05005023 int r = 1;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005024
Gleb Natapov55cd8e52010-01-17 15:51:22 +02005025 if (kvm_hv_hypercall_enabled(vcpu->kvm))
5026 return kvm_hv_hypercall(vcpu);
5027
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005028 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
5029 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
5030 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
5031 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
5032 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005033
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005034 trace_kvm_hypercall(nr, a0, a1, a2, a3);
Feng (Eric) Liu2714d1d2008-04-10 15:31:10 -04005035
Hollis Blanchard8776e512007-10-31 17:24:24 -05005036 if (!is_long_mode(vcpu)) {
5037 nr &= 0xFFFFFFFF;
5038 a0 &= 0xFFFFFFFF;
5039 a1 &= 0xFFFFFFFF;
5040 a2 &= 0xFFFFFFFF;
5041 a3 &= 0xFFFFFFFF;
5042 }
5043
Jan Kiszka07708c42009-08-03 18:43:28 +02005044 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
5045 ret = -KVM_EPERM;
5046 goto out;
5047 }
5048
Hollis Blanchard8776e512007-10-31 17:24:24 -05005049 switch (nr) {
Avi Kivityb93463a2007-10-25 16:52:32 +02005050 case KVM_HC_VAPIC_POLL_IRQ:
5051 ret = 0;
5052 break;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005053 default:
5054 ret = -KVM_ENOSYS;
5055 break;
5056 }
Jan Kiszka07708c42009-08-03 18:43:28 +02005057out:
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005058 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
Amit Shahf11c3a82008-02-21 01:00:30 +05305059 ++vcpu->stat.hypercalls;
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -05005060 return r;
Hollis Blanchard8776e512007-10-31 17:24:24 -05005061}
5062EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
5063
Jan Kiszkab6785de2012-09-20 07:43:17 +02005064static int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt)
Hollis Blanchard8776e512007-10-31 17:24:24 -05005065{
Avi Kivityd6aa1002011-04-20 15:47:13 +03005066 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005067 char instruction[3];
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005068 unsigned long rip = kvm_rip_read(vcpu);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005069
Hollis Blanchard8776e512007-10-31 17:24:24 -05005070 /*
5071 * Blow out the MMU to ensure that no other VCPU has an active mapping
5072 * to ensure that the updated hypercall appears atomically across all
5073 * VCPUs.
5074 */
5075 kvm_mmu_zap_all(vcpu->kvm);
5076
Hollis Blanchard8776e512007-10-31 17:24:24 -05005077 kvm_x86_ops->patch_hypercall(vcpu, instruction);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005078
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09005079 return emulator_write_emulated(ctxt, rip, instruction, 3, NULL);
Hollis Blanchard8776e512007-10-31 17:24:24 -05005080}
5081
Hollis Blanchardd0752062007-10-31 17:24:25 -05005082/*
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005083 * Check if userspace requested an interrupt window, and that the
5084 * interrupt window is open.
5085 *
5086 * No need to exit to userspace if we already have an interrupt queued.
5087 */
Avi Kivity851ba692009-08-24 11:10:17 +03005088static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005089{
Gleb Natapov80618232009-04-21 17:44:56 +03005090 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
Avi Kivity851ba692009-08-24 11:10:17 +03005091 vcpu->run->request_interrupt_window &&
Gleb Natapov5df56642009-04-21 17:44:59 +03005092 kvm_arch_interrupt_allowed(vcpu));
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005093}
5094
Avi Kivity851ba692009-08-24 11:10:17 +03005095static void post_kvm_run_save(struct kvm_vcpu *vcpu)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005096{
Avi Kivity851ba692009-08-24 11:10:17 +03005097 struct kvm_run *kvm_run = vcpu->run;
5098
Jan Kiszka91586a32009-10-05 13:07:21 +02005099 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02005100 kvm_run->cr8 = kvm_get_cr8(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005101 kvm_run->apic_base = kvm_get_apic_base(vcpu);
Jan Kiszka45312202008-12-11 16:54:54 +01005102 if (irqchip_in_kernel(vcpu->kvm))
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005103 kvm_run->ready_for_interrupt_injection = 1;
Jan Kiszka45312202008-12-11 16:54:54 +01005104 else
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005105 kvm_run->ready_for_interrupt_injection =
Gleb Natapovfa9726b2009-05-11 13:35:47 +03005106 kvm_arch_interrupt_allowed(vcpu) &&
5107 !kvm_cpu_has_interrupt(vcpu) &&
5108 !kvm_event_needs_reinjection(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005109}
5110
Xiao Guangrong44841412012-09-07 14:14:20 +08005111static int vapic_enter(struct kvm_vcpu *vcpu)
Avi Kivityb93463a2007-10-25 16:52:32 +02005112{
5113 struct kvm_lapic *apic = vcpu->arch.apic;
5114 struct page *page;
5115
5116 if (!apic || !apic->vapic_addr)
Xiao Guangrong44841412012-09-07 14:14:20 +08005117 return 0;
Avi Kivityb93463a2007-10-25 16:52:32 +02005118
5119 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
Xiao Guangrong44841412012-09-07 14:14:20 +08005120 if (is_error_page(page))
5121 return -EFAULT;
Izik Eidus72dc67a2008-02-10 18:04:15 +02005122
5123 vcpu->arch.apic->vapic_page = page;
Xiao Guangrong44841412012-09-07 14:14:20 +08005124 return 0;
Avi Kivityb93463a2007-10-25 16:52:32 +02005125}
5126
5127static void vapic_exit(struct kvm_vcpu *vcpu)
5128{
5129 struct kvm_lapic *apic = vcpu->arch.apic;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005130 int idx;
Avi Kivityb93463a2007-10-25 16:52:32 +02005131
5132 if (!apic || !apic->vapic_addr)
5133 return;
5134
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005135 idx = srcu_read_lock(&vcpu->kvm->srcu);
Avi Kivityb93463a2007-10-25 16:52:32 +02005136 kvm_release_page_dirty(apic->vapic_page);
5137 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005138 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Avi Kivityb93463a2007-10-25 16:52:32 +02005139}
5140
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005141static void update_cr8_intercept(struct kvm_vcpu *vcpu)
5142{
5143 int max_irr, tpr;
5144
5145 if (!kvm_x86_ops->update_cr8_intercept)
5146 return;
5147
Avi Kivity88c808f2009-08-17 22:49:40 +03005148 if (!vcpu->arch.apic)
5149 return;
5150
Gleb Natapov8db3baa2009-05-11 13:35:54 +03005151 if (!vcpu->arch.apic->vapic_addr)
5152 max_irr = kvm_lapic_find_highest_irr(vcpu);
5153 else
5154 max_irr = -1;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005155
5156 if (max_irr != -1)
5157 max_irr >>= 4;
5158
5159 tpr = kvm_lapic_get_cr8(vcpu);
5160
5161 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
5162}
5163
Avi Kivity851ba692009-08-24 11:10:17 +03005164static void inject_pending_event(struct kvm_vcpu *vcpu)
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005165{
5166 /* try to reinject previous events if any */
Gleb Natapovb59bb7b2009-07-09 15:33:51 +03005167 if (vcpu->arch.exception.pending) {
Avi Kivity5c1c85d02010-03-11 13:01:59 +02005168 trace_kvm_inj_exception(vcpu->arch.exception.nr,
5169 vcpu->arch.exception.has_error_code,
5170 vcpu->arch.exception.error_code);
Gleb Natapovb59bb7b2009-07-09 15:33:51 +03005171 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
5172 vcpu->arch.exception.has_error_code,
Joerg Roedelce7ddec2010-04-22 12:33:13 +02005173 vcpu->arch.exception.error_code,
5174 vcpu->arch.exception.reinject);
Gleb Natapovb59bb7b2009-07-09 15:33:51 +03005175 return;
5176 }
5177
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005178 if (vcpu->arch.nmi_injected) {
5179 kvm_x86_ops->set_nmi(vcpu);
5180 return;
5181 }
5182
5183 if (vcpu->arch.interrupt.pending) {
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005184 kvm_x86_ops->set_irq(vcpu);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005185 return;
5186 }
5187
5188 /* try to inject new event if pending */
5189 if (vcpu->arch.nmi_pending) {
5190 if (kvm_x86_ops->nmi_allowed(vcpu)) {
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005191 --vcpu->arch.nmi_pending;
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005192 vcpu->arch.nmi_injected = true;
5193 kvm_x86_ops->set_nmi(vcpu);
5194 }
5195 } else if (kvm_cpu_has_interrupt(vcpu)) {
5196 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005197 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
5198 false);
5199 kvm_x86_ops->set_irq(vcpu);
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005200 }
5201 }
5202}
5203
Dexuan Cui2acf9232010-06-10 11:27:12 +08005204static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu)
5205{
5206 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) &&
5207 !vcpu->guest_xcr0_loaded) {
5208 /* kvm_set_xcr() also depends on this */
5209 xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0);
5210 vcpu->guest_xcr0_loaded = 1;
5211 }
5212}
5213
5214static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu)
5215{
5216 if (vcpu->guest_xcr0_loaded) {
5217 if (vcpu->arch.xcr0 != host_xcr0)
5218 xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0);
5219 vcpu->guest_xcr0_loaded = 0;
5220 }
5221}
5222
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005223static void process_nmi(struct kvm_vcpu *vcpu)
5224{
5225 unsigned limit = 2;
5226
5227 /*
5228 * x86 is limited to one NMI running, and one NMI pending after it.
5229 * If an NMI is already in progress, limit further NMIs to just one.
5230 * Otherwise, allow two (and we'll inject the first one immediately).
5231 */
5232 if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected)
5233 limit = 1;
5234
5235 vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0);
5236 vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit);
5237 kvm_make_request(KVM_REQ_EVENT, vcpu);
5238}
5239
Avi Kivity851ba692009-08-24 11:10:17 +03005240static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005241{
5242 int r;
Gleb Natapov6a8b1d12009-05-11 13:35:51 +03005243 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
Avi Kivity851ba692009-08-24 11:10:17 +03005244 vcpu->run->request_interrupt_window;
Nadav Har'Eld6185f22011-09-22 13:52:56 +03005245 bool req_immediate_exit = 0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005246
Avi Kivity3e007502010-06-23 14:26:18 +03005247 if (vcpu->requests) {
Avi Kivitya8eeb042010-05-10 12:34:53 +03005248 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu))
Marcelo Tosatti2e53d632008-02-20 14:47:24 -05005249 kvm_mmu_unload(vcpu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005250 if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu))
Marcelo Tosatti2f599712008-05-27 12:10:20 -03005251 __kvm_migrate_timers(vcpu);
Zachary Amsden34c238a2010-09-18 14:38:14 -10005252 if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) {
5253 r = kvm_guest_time_update(vcpu);
Zachary Amsden8cfdc002010-08-19 22:07:21 -10005254 if (unlikely(r))
5255 goto out;
5256 }
Avi Kivitya8eeb042010-05-10 12:34:53 +03005257 if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu))
Marcelo Tosatti4731d4c2008-09-23 13:18:39 -03005258 kvm_mmu_sync_roots(vcpu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005259 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
Marcelo Tosattid4acf7e2008-06-06 16:37:35 -03005260 kvm_x86_ops->tlb_flush(vcpu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005261 if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03005262 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
Avi Kivityb93463a2007-10-25 16:52:32 +02005263 r = 0;
5264 goto out;
5265 }
Avi Kivitya8eeb042010-05-10 12:34:53 +03005266 if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) {
Avi Kivity851ba692009-08-24 11:10:17 +03005267 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
Joerg Roedel71c4dfa2008-02-26 16:49:16 +01005268 r = 0;
5269 goto out;
5270 }
Avi Kivitya8eeb042010-05-10 12:34:53 +03005271 if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) {
Avi Kivity02daab22009-12-30 12:40:26 +02005272 vcpu->fpu_active = 0;
5273 kvm_x86_ops->fpu_deactivate(vcpu);
5274 }
Gleb Natapovaf585b92010-10-14 11:22:46 +02005275 if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) {
5276 /* Page is swapped out. Do synthetic halt */
5277 vcpu->arch.apf.halted = true;
5278 r = 1;
5279 goto out;
5280 }
Glauber Costac9aaa892011-07-11 15:28:14 -04005281 if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu))
5282 record_steal_time(vcpu);
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005283 if (kvm_check_request(KVM_REQ_NMI, vcpu))
5284 process_nmi(vcpu);
Nadav Har'Eld6185f22011-09-22 13:52:56 +03005285 req_immediate_exit =
5286 kvm_check_request(KVM_REQ_IMMEDIATE_EXIT, vcpu);
Gleb Natapovf5132b02011-11-10 14:57:22 +02005287 if (kvm_check_request(KVM_REQ_PMU, vcpu))
5288 kvm_handle_pmu_event(vcpu);
5289 if (kvm_check_request(KVM_REQ_PMI, vcpu))
5290 kvm_deliver_pmi(vcpu);
Avi Kivity2f52d582008-01-16 12:49:30 +02005291 }
Avi Kivityb93463a2007-10-25 16:52:32 +02005292
Avi Kivityb463a6f2010-07-20 15:06:17 +03005293 if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) {
Avi Kivity3842d132010-07-27 12:30:24 +03005294 inject_pending_event(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005295
Avi Kivity3842d132010-07-27 12:30:24 +03005296 /* enable NMI/IRQ window open exits if needed */
Avi Kivity7460fb4a2011-09-20 13:43:14 +03005297 if (vcpu->arch.nmi_pending)
Avi Kivity3842d132010-07-27 12:30:24 +03005298 kvm_x86_ops->enable_nmi_window(vcpu);
5299 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
5300 kvm_x86_ops->enable_irq_window(vcpu);
Gleb Natapov6a8b1d12009-05-11 13:35:51 +03005301
Avi Kivity3842d132010-07-27 12:30:24 +03005302 if (kvm_lapic_enabled(vcpu)) {
5303 update_cr8_intercept(vcpu);
5304 kvm_lapic_sync_to_vapic(vcpu);
5305 }
Gleb Natapov95ba8273132009-04-21 17:45:08 +03005306 }
Avi Kivityb93463a2007-10-25 16:52:32 +02005307
Avi Kivityd8368af2012-05-14 18:07:56 +03005308 r = kvm_mmu_reload(vcpu);
5309 if (unlikely(r)) {
Michael S. Tsirkind905c062012-06-24 19:25:00 +03005310 goto cancel_injection;
Avi Kivityd8368af2012-05-14 18:07:56 +03005311 }
5312
Jan Kiszka42dbaa52008-12-15 13:52:10 +01005313 preempt_disable();
5314
5315 kvm_x86_ops->prepare_guest_switch(vcpu);
5316 if (vcpu->fpu_active)
5317 kvm_load_guest_fpu(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005318 kvm_load_guest_xcr0(vcpu);
5319
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005320 vcpu->mode = IN_GUEST_MODE;
5321
5322 /* We should set ->mode before check ->requests,
5323 * see the comment in make_all_cpus_request.
5324 */
5325 smp_mb();
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005326
5327 local_irq_disable();
5328
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005329 if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005330 || need_resched() || signal_pending(current)) {
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005331 vcpu->mode = OUTSIDE_GUEST_MODE;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005332 smp_wmb();
5333 local_irq_enable();
5334 preempt_enable();
5335 r = 1;
Michael S. Tsirkind905c062012-06-24 19:25:00 +03005336 goto cancel_injection;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005337 }
5338
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005339 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005340
Nadav Har'Eld6185f22011-09-22 13:52:56 +03005341 if (req_immediate_exit)
5342 smp_send_reschedule(vcpu->cpu);
5343
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005344 kvm_guest_enter();
5345
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005346 if (unlikely(vcpu->arch.switch_db_regs)) {
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005347 set_debugreg(0, 7);
5348 set_debugreg(vcpu->arch.eff_db[0], 0);
5349 set_debugreg(vcpu->arch.eff_db[1], 1);
5350 set_debugreg(vcpu->arch.eff_db[2], 2);
5351 set_debugreg(vcpu->arch.eff_db[3], 3);
5352 }
5353
Marcelo Tosatti229456f2009-06-17 09:22:14 -03005354 trace_kvm_entry(vcpu->vcpu_id);
Avi Kivity851ba692009-08-24 11:10:17 +03005355 kvm_x86_ops->run(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005356
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +02005357 /*
5358 * If the guest has used debug registers, at least dr7
5359 * will be disabled while returning to the host.
5360 * If we don't have active breakpoints in the host, we don't
5361 * care about the messed up debug address registers. But if
5362 * we have some of them active, restore the old state.
5363 */
Frederic Weisbecker59d8eb52009-11-10 11:03:12 +01005364 if (hw_breakpoint_active())
Frederic Weisbecker24f1e32c2009-09-09 19:22:48 +02005365 hw_breakpoint_restore();
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005366
Nadav Har'Eld5c17852011-08-02 15:54:20 +03005367 vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu);
Zachary Amsden1d5f0662010-08-19 22:07:30 -10005368
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +08005369 vcpu->mode = OUTSIDE_GUEST_MODE;
Avi Kivityd94e1dc2010-05-03 16:54:48 +03005370 smp_wmb();
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005371 local_irq_enable();
5372
5373 ++vcpu->stat.exits;
5374
5375 /*
5376 * We must have an instruction between local_irq_enable() and
5377 * kvm_guest_exit(), so the timer interrupt isn't delayed by
5378 * the interrupt shadow. The stat.exits increment will do nicely.
5379 * But we need to prevent reordering, hence this barrier():
5380 */
5381 barrier();
5382
5383 kvm_guest_exit();
5384
5385 preempt_enable();
5386
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005387 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
Marcelo Tosatti3200f402008-03-29 20:17:59 -03005388
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005389 /*
5390 * Profile KVM exit RIPs:
5391 */
5392 if (unlikely(prof_on == KVM_PROFILING)) {
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005393 unsigned long rip = kvm_rip_read(vcpu);
5394 profile_hit(KVM_PROFILING, (void *)rip);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005395 }
5396
Zachary Amsdencc578282012-02-03 15:43:50 -02005397 if (unlikely(vcpu->arch.tsc_always_catchup))
5398 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
Avi Kivity298101d2007-11-25 13:41:11 +02005399
Michael S. Tsirkin5cfb1d52012-06-24 19:24:54 +03005400 if (vcpu->arch.apic_attention)
5401 kvm_lapic_sync_from_vapic(vcpu);
Avi Kivityb93463a2007-10-25 16:52:32 +02005402
Avi Kivity851ba692009-08-24 11:10:17 +03005403 r = kvm_x86_ops->handle_exit(vcpu);
Michael S. Tsirkind905c062012-06-24 19:25:00 +03005404 return r;
5405
5406cancel_injection:
5407 kvm_x86_ops->cancel_injection(vcpu);
Michael S. Tsirkinae7a2a32012-06-24 19:25:07 +03005408 if (unlikely(vcpu->arch.apic_attention))
5409 kvm_lapic_sync_from_vapic(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005410out:
Marcelo Tosattid7690172008-09-08 15:23:48 -03005411 return r;
5412}
5413
Gleb Natapov09cec752009-03-23 15:11:44 +02005414
Avi Kivity851ba692009-08-24 11:10:17 +03005415static int __vcpu_run(struct kvm_vcpu *vcpu)
Marcelo Tosattid7690172008-09-08 15:23:48 -03005416{
5417 int r;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005418 struct kvm *kvm = vcpu->kvm;
Marcelo Tosattid7690172008-09-08 15:23:48 -03005419
5420 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
Jan Kiszka1b10bf32008-09-30 10:41:06 +02005421 pr_debug("vcpu %d received sipi with vector # %x\n",
5422 vcpu->vcpu_id, vcpu->arch.sipi_vector);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005423 kvm_lapic_reset(vcpu);
Jan Kiszka8b6e4542012-09-20 07:43:08 +02005424 r = kvm_vcpu_reset(vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005425 if (r)
5426 return r;
5427 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005428 }
5429
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005430 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
Xiao Guangrong44841412012-09-07 14:14:20 +08005431 r = vapic_enter(vcpu);
5432 if (r) {
5433 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
5434 return r;
5435 }
Marcelo Tosattid7690172008-09-08 15:23:48 -03005436
5437 r = 1;
5438 while (r > 0) {
Gleb Natapovaf585b92010-10-14 11:22:46 +02005439 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
5440 !vcpu->arch.apf.halted)
Avi Kivity851ba692009-08-24 11:10:17 +03005441 r = vcpu_enter_guest(vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005442 else {
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005443 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005444 kvm_vcpu_block(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005445 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
Avi Kivitya8eeb042010-05-10 12:34:53 +03005446 if (kvm_check_request(KVM_REQ_UNHALT, vcpu))
Gleb Natapov09cec752009-03-23 15:11:44 +02005447 {
5448 switch(vcpu->arch.mp_state) {
5449 case KVM_MP_STATE_HALTED:
Marcelo Tosattid7690172008-09-08 15:23:48 -03005450 vcpu->arch.mp_state =
Gleb Natapov09cec752009-03-23 15:11:44 +02005451 KVM_MP_STATE_RUNNABLE;
5452 case KVM_MP_STATE_RUNNABLE:
Gleb Natapovaf585b92010-10-14 11:22:46 +02005453 vcpu->arch.apf.halted = false;
Gleb Natapov09cec752009-03-23 15:11:44 +02005454 break;
5455 case KVM_MP_STATE_SIPI_RECEIVED:
5456 default:
5457 r = -EINTR;
5458 break;
5459 }
5460 }
Marcelo Tosattid7690172008-09-08 15:23:48 -03005461 }
5462
Gleb Natapov09cec752009-03-23 15:11:44 +02005463 if (r <= 0)
5464 break;
5465
5466 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
5467 if (kvm_cpu_has_pending_timer(vcpu))
5468 kvm_inject_pending_timer_irqs(vcpu);
5469
Avi Kivity851ba692009-08-24 11:10:17 +03005470 if (dm_request_for_irq_injection(vcpu)) {
Gleb Natapov09cec752009-03-23 15:11:44 +02005471 r = -EINTR;
Avi Kivity851ba692009-08-24 11:10:17 +03005472 vcpu->run->exit_reason = KVM_EXIT_INTR;
Gleb Natapov09cec752009-03-23 15:11:44 +02005473 ++vcpu->stat.request_irq_exits;
5474 }
Gleb Natapovaf585b92010-10-14 11:22:46 +02005475
5476 kvm_check_async_pf_completion(vcpu);
5477
Gleb Natapov09cec752009-03-23 15:11:44 +02005478 if (signal_pending(current)) {
5479 r = -EINTR;
Avi Kivity851ba692009-08-24 11:10:17 +03005480 vcpu->run->exit_reason = KVM_EXIT_INTR;
Gleb Natapov09cec752009-03-23 15:11:44 +02005481 ++vcpu->stat.signal_exits;
5482 }
5483 if (need_resched()) {
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005484 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
Gleb Natapov09cec752009-03-23 15:11:44 +02005485 kvm_resched(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005486 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005487 }
5488 }
5489
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005490 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005491
Avi Kivityb93463a2007-10-25 16:52:32 +02005492 vapic_exit(vcpu);
5493
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005494 return r;
5495}
5496
Gleb Natapov716d51a2012-09-03 15:24:26 +03005497static inline int complete_emulated_io(struct kvm_vcpu *vcpu)
5498{
5499 int r;
5500 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
5501 r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE);
5502 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
5503 if (r != EMULATE_DONE)
5504 return 0;
5505 return 1;
5506}
5507
5508static int complete_emulated_pio(struct kvm_vcpu *vcpu)
5509{
5510 BUG_ON(!vcpu->arch.pio.count);
5511
5512 return complete_emulated_io(vcpu);
5513}
5514
Avi Kivityf78146b2012-04-18 19:22:47 +03005515/*
5516 * Implements the following, as a state machine:
5517 *
5518 * read:
5519 * for each fragment
5520 * write gpa, len
5521 * exit
5522 * copy data
5523 * execute insn
5524 *
5525 * write:
5526 * for each fragment
5527 * write gpa, len
5528 * copy data
5529 * exit
5530 */
Gleb Natapov716d51a2012-09-03 15:24:26 +03005531static int complete_emulated_mmio(struct kvm_vcpu *vcpu)
Avi Kivity5287f192010-01-19 14:20:10 +02005532{
5533 struct kvm_run *run = vcpu->run;
Avi Kivityf78146b2012-04-18 19:22:47 +03005534 struct kvm_mmio_fragment *frag;
Avi Kivity5287f192010-01-19 14:20:10 +02005535
Gleb Natapov716d51a2012-09-03 15:24:26 +03005536 BUG_ON(!vcpu->mmio_needed);
Avi Kivity5287f192010-01-19 14:20:10 +02005537
Gleb Natapov716d51a2012-09-03 15:24:26 +03005538 /* Complete previous fragment */
5539 frag = &vcpu->mmio_fragments[vcpu->mmio_cur_fragment++];
5540 if (!vcpu->mmio_is_write)
5541 memcpy(frag->data, run->mmio.data, frag->len);
5542 if (vcpu->mmio_cur_fragment == vcpu->mmio_nr_fragments) {
5543 vcpu->mmio_needed = 0;
Avi Kivitycef4dea2010-01-20 12:01:20 +02005544 if (vcpu->mmio_is_write)
Gleb Natapov716d51a2012-09-03 15:24:26 +03005545 return 1;
5546 vcpu->mmio_read_completed = 1;
5547 return complete_emulated_io(vcpu);
Avi Kivity5287f192010-01-19 14:20:10 +02005548 }
Gleb Natapov716d51a2012-09-03 15:24:26 +03005549 /* Initiate next fragment */
5550 ++frag;
5551 run->exit_reason = KVM_EXIT_MMIO;
5552 run->mmio.phys_addr = frag->gpa;
5553 if (vcpu->mmio_is_write)
5554 memcpy(run->mmio.data, frag->data, frag->len);
5555 run->mmio.len = frag->len;
5556 run->mmio.is_write = vcpu->mmio_is_write;
5557 vcpu->arch.complete_userspace_io = complete_emulated_mmio;
5558 return 0;
Avi Kivity5287f192010-01-19 14:20:10 +02005559}
5560
Gleb Natapov716d51a2012-09-03 15:24:26 +03005561
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005562int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
5563{
5564 int r;
5565 sigset_t sigsaved;
5566
Avi Kivitye5c30142011-01-11 12:15:54 +02005567 if (!tsk_used_math(current) && init_fpu(current))
5568 return -ENOMEM;
5569
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005570 if (vcpu->sigset_active)
5571 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
5572
Avi Kivityac9f6dc2008-07-06 15:48:31 +03005573 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
5574 kvm_vcpu_block(vcpu);
Marcelo Tosattid7690172008-09-08 15:23:48 -03005575 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
Avi Kivityac9f6dc2008-07-06 15:48:31 +03005576 r = -EAGAIN;
5577 goto out;
5578 }
5579
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005580 /* re-sync apic's tpr */
Andre Przywaraeea1cff2010-12-21 11:12:00 +01005581 if (!irqchip_in_kernel(vcpu->kvm)) {
5582 if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) {
5583 r = -EINVAL;
5584 goto out;
5585 }
5586 }
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005587
Gleb Natapov716d51a2012-09-03 15:24:26 +03005588 if (unlikely(vcpu->arch.complete_userspace_io)) {
5589 int (*cui)(struct kvm_vcpu *) = vcpu->arch.complete_userspace_io;
5590 vcpu->arch.complete_userspace_io = NULL;
5591 r = cui(vcpu);
5592 if (r <= 0)
5593 goto out;
5594 } else
5595 WARN_ON(vcpu->arch.pio.count || vcpu->mmio_needed);
Avi Kivity5287f192010-01-19 14:20:10 +02005596
Avi Kivity851ba692009-08-24 11:10:17 +03005597 r = __vcpu_run(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005598
5599out:
Marcelo Tosattif1d86e42010-05-03 23:04:27 -03005600 post_kvm_run_save(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005601 if (vcpu->sigset_active)
5602 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
5603
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005604 return r;
5605}
5606
5607int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5608{
Gleb Natapov7ae441e2011-03-31 12:06:41 +02005609 if (vcpu->arch.emulate_regs_need_sync_to_vcpu) {
5610 /*
5611 * We are here if userspace calls get_regs() in the middle of
5612 * instruction emulation. Registers state needs to be copied
Guo Chao4a969982012-06-28 15:17:27 +08005613 * back from emulation context to vcpu. Userspace shouldn't do
Gleb Natapov7ae441e2011-03-31 12:06:41 +02005614 * that usually, but some bad designed PV devices (vmware
5615 * backdoor interface) need this to work
5616 */
Avi Kivitydd856ef2012-08-27 23:46:17 +03005617 emulator_writeback_register_cache(&vcpu->arch.emulate_ctxt);
Gleb Natapov7ae441e2011-03-31 12:06:41 +02005618 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
5619 }
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005620 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
5621 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
5622 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
5623 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
5624 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
5625 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
5626 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
5627 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005628#ifdef CONFIG_X86_64
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005629 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
5630 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
5631 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
5632 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
5633 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
5634 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
5635 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
5636 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005637#endif
5638
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005639 regs->rip = kvm_rip_read(vcpu);
Jan Kiszka91586a32009-10-05 13:07:21 +02005640 regs->rflags = kvm_get_rflags(vcpu);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005641
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005642 return 0;
5643}
5644
5645int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5646{
Gleb Natapov7ae441e2011-03-31 12:06:41 +02005647 vcpu->arch.emulate_regs_need_sync_from_vcpu = true;
5648 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
5649
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005650 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
5651 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
5652 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
5653 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
5654 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
5655 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
5656 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
5657 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005658#ifdef CONFIG_X86_64
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005659 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
5660 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
5661 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
5662 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
5663 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
5664 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
5665 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
5666 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005667#endif
5668
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -03005669 kvm_rip_write(vcpu, regs->rip);
Jan Kiszka91586a32009-10-05 13:07:21 +02005670 kvm_set_rflags(vcpu, regs->rflags);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005671
Jan Kiszkab4f14ab2008-04-30 17:59:04 +02005672 vcpu->arch.exception.pending = false;
5673
Avi Kivity3842d132010-07-27 12:30:24 +03005674 kvm_make_request(KVM_REQ_EVENT, vcpu);
5675
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005676 return 0;
5677}
5678
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005679void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
5680{
5681 struct kvm_segment cs;
5682
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02005683 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005684 *db = cs.db;
5685 *l = cs.l;
5686}
5687EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
5688
5689int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
5690 struct kvm_sregs *sregs)
5691{
Gleb Natapov89a27f42010-02-16 10:51:48 +02005692 struct desc_ptr dt;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005693
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02005694 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5695 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5696 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5697 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5698 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5699 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005700
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02005701 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5702 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005703
5704 kvm_x86_ops->get_idt(vcpu, &dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02005705 sregs->idt.limit = dt.size;
5706 sregs->idt.base = dt.address;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005707 kvm_x86_ops->get_gdt(vcpu, &dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02005708 sregs->gdt.limit = dt.size;
5709 sregs->gdt.base = dt.address;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005710
Avi Kivity4d4ec082009-12-29 18:07:30 +02005711 sregs->cr0 = kvm_read_cr0(vcpu);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005712 sregs->cr2 = vcpu->arch.cr2;
Avi Kivity9f8fe502010-12-05 17:30:00 +02005713 sregs->cr3 = kvm_read_cr3(vcpu);
Avi Kivityfc78f512009-12-07 12:16:48 +02005714 sregs->cr4 = kvm_read_cr4(vcpu);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02005715 sregs->cr8 = kvm_get_cr8(vcpu);
Avi Kivityf6801df2010-01-21 15:31:50 +02005716 sregs->efer = vcpu->arch.efer;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005717 sregs->apic_base = kvm_get_apic_base(vcpu);
5718
Gleb Natapov923c61b2009-05-11 13:35:48 +03005719 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005720
Gleb Natapov36752c92009-05-11 13:35:53 +03005721 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
Gleb Natapov14d0bc12009-04-21 17:45:11 +03005722 set_bit(vcpu->arch.interrupt.nr,
5723 (unsigned long *)sregs->interrupt_bitmap);
Gleb Natapov16d7a192009-04-21 17:45:10 +03005724
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005725 return 0;
5726}
5727
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03005728int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
5729 struct kvm_mp_state *mp_state)
5730{
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03005731 mp_state->mp_state = vcpu->arch.mp_state;
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03005732 return 0;
5733}
5734
5735int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
5736 struct kvm_mp_state *mp_state)
5737{
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03005738 vcpu->arch.mp_state = mp_state->mp_state;
Avi Kivity3842d132010-07-27 12:30:24 +03005739 kvm_make_request(KVM_REQ_EVENT, vcpu);
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -03005740 return 0;
5741}
5742
Kevin Wolf7f3d35f2012-02-08 14:34:38 +01005743int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
5744 int reason, bool has_error_code, u32 error_code)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005745{
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09005746 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
Mohammed Gamal8ec47222010-08-16 00:47:01 +03005747 int ret;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005748
Mohammed Gamal8ec47222010-08-16 00:47:01 +03005749 init_emulate_ctxt(vcpu);
Izik Eidus37817f22008-03-24 23:14:53 +02005750
Kevin Wolf7f3d35f2012-02-08 14:34:38 +01005751 ret = emulator_task_switch(ctxt, tss_selector, idt_index, reason,
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09005752 has_error_code, error_code);
Izik Eidus37817f22008-03-24 23:14:53 +02005753
Gleb Natapovc6975182010-02-18 12:15:01 +02005754 if (ret)
Gleb Natapov19d04432010-04-15 12:29:50 +03005755 return EMULATE_FAIL;
Gleb Natapovc6975182010-02-18 12:15:01 +02005756
Takuya Yoshikawa9d741912011-05-29 21:53:48 +09005757 kvm_rip_write(vcpu, ctxt->eip);
5758 kvm_set_rflags(vcpu, ctxt->eflags);
Avi Kivity3842d132010-07-27 12:30:24 +03005759 kvm_make_request(KVM_REQ_EVENT, vcpu);
Gleb Natapov19d04432010-04-15 12:29:50 +03005760 return EMULATE_DONE;
Izik Eidus37817f22008-03-24 23:14:53 +02005761}
5762EXPORT_SYMBOL_GPL(kvm_task_switch);
5763
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005764int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
5765 struct kvm_sregs *sregs)
5766{
5767 int mmu_reset_needed = 0;
Xiao Guangrong63f42e02011-01-12 15:39:18 +08005768 int pending_vec, max_bits, idx;
Gleb Natapov89a27f42010-02-16 10:51:48 +02005769 struct desc_ptr dt;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005770
Gleb Natapov89a27f42010-02-16 10:51:48 +02005771 dt.size = sregs->idt.limit;
5772 dt.address = sregs->idt.base;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005773 kvm_x86_ops->set_idt(vcpu, &dt);
Gleb Natapov89a27f42010-02-16 10:51:48 +02005774 dt.size = sregs->gdt.limit;
5775 dt.address = sregs->gdt.base;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005776 kvm_x86_ops->set_gdt(vcpu, &dt);
5777
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005778 vcpu->arch.cr2 = sregs->cr2;
Avi Kivity9f8fe502010-12-05 17:30:00 +02005779 mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3;
Jan Kiszkadc7e7952009-07-01 20:52:03 +02005780 vcpu->arch.cr3 = sregs->cr3;
Avi Kivityaff48ba2010-12-05 18:56:11 +02005781 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005782
Avi Kivity2d3ad1f2008-02-24 11:20:43 +02005783 kvm_set_cr8(vcpu, sregs->cr8);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005784
Avi Kivityf6801df2010-01-21 15:31:50 +02005785 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005786 kvm_x86_ops->set_efer(vcpu, sregs->efer);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005787 kvm_set_apic_base(vcpu, sregs->apic_base);
5788
Avi Kivity4d4ec082009-12-29 18:07:30 +02005789 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005790 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
Paul Knowlesd7306162008-02-06 11:02:35 +00005791 vcpu->arch.cr0 = sregs->cr0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005792
Avi Kivityfc78f512009-12-07 12:16:48 +02005793 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005794 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
Sheng Yang3ea3aa82010-12-08 10:49:43 +08005795 if (sregs->cr4 & X86_CR4_OSXSAVE)
Avi Kivity00b27a32011-11-23 16:30:32 +02005796 kvm_update_cpuid(vcpu);
Xiao Guangrong63f42e02011-01-12 15:39:18 +08005797
5798 idx = srcu_read_lock(&vcpu->kvm->srcu);
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02005799 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
Avi Kivity9f8fe502010-12-05 17:30:00 +02005800 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
Marcelo Tosatti7c93be42009-10-26 16:48:33 -02005801 mmu_reset_needed = 1;
5802 }
Xiao Guangrong63f42e02011-01-12 15:39:18 +08005803 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005804
5805 if (mmu_reset_needed)
5806 kvm_mmu_reset_context(vcpu);
5807
Michael S. Tsirkina50abc32012-09-05 20:00:52 +03005808 max_bits = KVM_NR_INTERRUPTS;
Gleb Natapov923c61b2009-05-11 13:35:48 +03005809 pending_vec = find_first_bit(
5810 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
5811 if (pending_vec < max_bits) {
Gleb Natapov66fd3f72009-05-11 13:35:50 +03005812 kvm_queue_interrupt(vcpu, pending_vec, false);
Gleb Natapov923c61b2009-05-11 13:35:48 +03005813 pr_debug("Set back pending irq %d\n", pending_vec);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005814 }
5815
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02005816 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5817 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5818 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5819 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5820 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5821 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005822
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +02005823 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5824 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005825
Mikhail Ershov5f0269f2009-08-03 14:58:25 +03005826 update_cr8_intercept(vcpu);
5827
Marcelo Tosatti9c3e4aa2008-09-10 16:40:55 -03005828 /* Older userspace won't unhalt the vcpu on reset. */
Gleb Natapovc5af89b2009-06-09 15:56:26 +03005829 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
Marcelo Tosatti9c3e4aa2008-09-10 16:40:55 -03005830 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
Avi Kivity3eeb3282010-01-21 15:31:48 +02005831 !is_protmode(vcpu))
Marcelo Tosatti9c3e4aa2008-09-10 16:40:55 -03005832 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5833
Avi Kivity3842d132010-07-27 12:30:24 +03005834 kvm_make_request(KVM_REQ_EVENT, vcpu);
5835
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005836 return 0;
5837}
5838
Jan Kiszkad0bfb942008-12-15 13:52:10 +01005839int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
5840 struct kvm_guest_debug *dbg)
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005841{
Jan Kiszka355be0b2009-10-03 00:31:21 +02005842 unsigned long rflags;
Jan Kiszkaae675ef2008-12-15 13:52:10 +01005843 int i, r;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005844
Jan Kiszka4f926bf22009-10-30 12:46:59 +01005845 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
5846 r = -EBUSY;
5847 if (vcpu->arch.exception.pending)
Avi Kivity2122ff52010-05-13 11:25:04 +03005848 goto out;
Jan Kiszka4f926bf22009-10-30 12:46:59 +01005849 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
5850 kvm_queue_exception(vcpu, DB_VECTOR);
5851 else
5852 kvm_queue_exception(vcpu, BP_VECTOR);
5853 }
5854
Jan Kiszka91586a32009-10-05 13:07:21 +02005855 /*
5856 * Read rflags as long as potentially injected trace flags are still
5857 * filtered out.
5858 */
5859 rflags = kvm_get_rflags(vcpu);
Jan Kiszka355be0b2009-10-03 00:31:21 +02005860
5861 vcpu->guest_debug = dbg->control;
5862 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
5863 vcpu->guest_debug = 0;
5864
5865 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
Jan Kiszkaae675ef2008-12-15 13:52:10 +01005866 for (i = 0; i < KVM_NR_DB_REGS; ++i)
5867 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
Jan Kiszkac8639012012-09-21 05:42:55 +02005868 vcpu->arch.guest_debug_dr7 = dbg->arch.debugreg[7];
Jan Kiszkaae675ef2008-12-15 13:52:10 +01005869 } else {
5870 for (i = 0; i < KVM_NR_DB_REGS; i++)
5871 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
Jan Kiszkaae675ef2008-12-15 13:52:10 +01005872 }
Jan Kiszkac8639012012-09-21 05:42:55 +02005873 kvm_update_dr7(vcpu);
Jan Kiszkaae675ef2008-12-15 13:52:10 +01005874
Jan Kiszkaf92653e2010-02-23 17:47:55 +01005875 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5876 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
5877 get_segment_base(vcpu, VCPU_SREG_CS);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005878
Jan Kiszka91586a32009-10-05 13:07:21 +02005879 /*
5880 * Trigger an rflags update that will inject or remove the trace
5881 * flags.
5882 */
5883 kvm_set_rflags(vcpu, rflags);
Jan Kiszkad0bfb942008-12-15 13:52:10 +01005884
Jan Kiszkac8639012012-09-21 05:42:55 +02005885 kvm_x86_ops->update_db_bp_intercept(vcpu);
Jan Kiszka355be0b2009-10-03 00:31:21 +02005886
Jan Kiszka4f926bf22009-10-30 12:46:59 +01005887 r = 0;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005888
Avi Kivity2122ff52010-05-13 11:25:04 +03005889out:
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -05005890
5891 return r;
5892}
5893
5894/*
Zhang Xiantao8b006792007-11-16 13:05:55 +08005895 * Translate a guest virtual address to a guest physical address.
5896 */
5897int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
5898 struct kvm_translation *tr)
5899{
5900 unsigned long vaddr = tr->linear_address;
5901 gpa_t gpa;
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005902 int idx;
Zhang Xiantao8b006792007-11-16 13:05:55 +08005903
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005904 idx = srcu_read_lock(&vcpu->kvm->srcu);
Gleb Natapov1871c602010-02-10 14:21:32 +02005905 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02005906 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Zhang Xiantao8b006792007-11-16 13:05:55 +08005907 tr->physical_address = gpa;
5908 tr->valid = gpa != UNMAPPED_GVA;
5909 tr->writeable = 1;
5910 tr->usermode = 0;
Zhang Xiantao8b006792007-11-16 13:05:55 +08005911
5912 return 0;
5913}
5914
Hollis Blanchardd0752062007-10-31 17:24:25 -05005915int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5916{
Sheng Yang98918832010-05-17 17:08:28 +08005917 struct i387_fxsave_struct *fxsave =
5918 &vcpu->arch.guest_fpu.state->fxsave;
Hollis Blanchardd0752062007-10-31 17:24:25 -05005919
Hollis Blanchardd0752062007-10-31 17:24:25 -05005920 memcpy(fpu->fpr, fxsave->st_space, 128);
5921 fpu->fcw = fxsave->cwd;
5922 fpu->fsw = fxsave->swd;
5923 fpu->ftwx = fxsave->twd;
5924 fpu->last_opcode = fxsave->fop;
5925 fpu->last_ip = fxsave->rip;
5926 fpu->last_dp = fxsave->rdp;
5927 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
5928
Hollis Blanchardd0752062007-10-31 17:24:25 -05005929 return 0;
5930}
5931
5932int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5933{
Sheng Yang98918832010-05-17 17:08:28 +08005934 struct i387_fxsave_struct *fxsave =
5935 &vcpu->arch.guest_fpu.state->fxsave;
Hollis Blanchardd0752062007-10-31 17:24:25 -05005936
Hollis Blanchardd0752062007-10-31 17:24:25 -05005937 memcpy(fxsave->st_space, fpu->fpr, 128);
5938 fxsave->cwd = fpu->fcw;
5939 fxsave->swd = fpu->fsw;
5940 fxsave->twd = fpu->ftwx;
5941 fxsave->fop = fpu->last_opcode;
5942 fxsave->rip = fpu->last_ip;
5943 fxsave->rdp = fpu->last_dp;
5944 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
5945
Hollis Blanchardd0752062007-10-31 17:24:25 -05005946 return 0;
5947}
5948
Jan Kiszka10ab25c2010-05-25 16:01:50 +02005949int fx_init(struct kvm_vcpu *vcpu)
Hollis Blanchardd0752062007-10-31 17:24:25 -05005950{
Jan Kiszka10ab25c2010-05-25 16:01:50 +02005951 int err;
5952
5953 err = fpu_alloc(&vcpu->arch.guest_fpu);
5954 if (err)
5955 return err;
5956
Sheng Yang98918832010-05-17 17:08:28 +08005957 fpu_finit(&vcpu->arch.guest_fpu);
Hollis Blanchardd0752062007-10-31 17:24:25 -05005958
Dexuan Cui2acf9232010-06-10 11:27:12 +08005959 /*
5960 * Ensure guest xcr0 is valid for loading
5961 */
5962 vcpu->arch.xcr0 = XSTATE_FP;
5963
Zhang Xiantaoad312c72007-12-13 23:50:52 +08005964 vcpu->arch.cr0 |= X86_CR0_ET;
Jan Kiszka10ab25c2010-05-25 16:01:50 +02005965
5966 return 0;
Hollis Blanchardd0752062007-10-31 17:24:25 -05005967}
5968EXPORT_SYMBOL_GPL(fx_init);
5969
Sheng Yang98918832010-05-17 17:08:28 +08005970static void fx_free(struct kvm_vcpu *vcpu)
5971{
5972 fpu_free(&vcpu->arch.guest_fpu);
5973}
5974
Hollis Blanchardd0752062007-10-31 17:24:25 -05005975void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
5976{
Avi Kivity2608d7a2010-01-21 15:31:45 +02005977 if (vcpu->guest_fpu_loaded)
Hollis Blanchardd0752062007-10-31 17:24:25 -05005978 return;
5979
Dexuan Cui2acf9232010-06-10 11:27:12 +08005980 /*
5981 * Restore all possible states in the guest,
5982 * and assume host would use all available bits.
5983 * Guest xcr0 would be loaded later.
5984 */
5985 kvm_put_guest_xcr0(vcpu);
Hollis Blanchardd0752062007-10-31 17:24:25 -05005986 vcpu->guest_fpu_loaded = 1;
Suresh Siddhab1a74bf2012-09-20 11:01:49 -07005987 __kernel_fpu_begin();
Sheng Yang98918832010-05-17 17:08:28 +08005988 fpu_restore_checking(&vcpu->arch.guest_fpu);
Avi Kivity0c048512010-01-21 15:31:52 +02005989 trace_kvm_fpu(1);
Hollis Blanchardd0752062007-10-31 17:24:25 -05005990}
Hollis Blanchardd0752062007-10-31 17:24:25 -05005991
5992void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
5993{
Dexuan Cui2acf9232010-06-10 11:27:12 +08005994 kvm_put_guest_xcr0(vcpu);
5995
Hollis Blanchardd0752062007-10-31 17:24:25 -05005996 if (!vcpu->guest_fpu_loaded)
5997 return;
5998
5999 vcpu->guest_fpu_loaded = 0;
Sheng Yang98918832010-05-17 17:08:28 +08006000 fpu_save_init(&vcpu->arch.guest_fpu);
Suresh Siddhab1a74bf2012-09-20 11:01:49 -07006001 __kernel_fpu_end();
Avi Kivityf096ed82007-11-18 13:54:33 +02006002 ++vcpu->stat.fpu_reload;
Avi Kivitya8eeb042010-05-10 12:34:53 +03006003 kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu);
Avi Kivity0c048512010-01-21 15:31:52 +02006004 trace_kvm_fpu(0);
Hollis Blanchardd0752062007-10-31 17:24:25 -05006005}
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006006
6007void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
6008{
Glauber Costa12f9a482011-02-01 14:16:40 -05006009 kvmclock_reset(vcpu);
Joerg Roedel7f1ea202009-02-25 16:08:31 +01006010
Sheng Yangf5f48ee2010-06-30 12:25:15 +08006011 free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
Sheng Yang98918832010-05-17 17:08:28 +08006012 fx_free(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006013 kvm_x86_ops->vcpu_free(vcpu);
6014}
6015
6016struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
6017 unsigned int id)
6018{
Zachary Amsden6755bae2010-08-19 22:07:22 -10006019 if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0)
6020 printk_once(KERN_WARNING
6021 "kvm: SMP vm created on host with unstable TSC; "
6022 "guest TSC will not be reliable\n");
Avi Kivity26e52152007-11-20 15:30:24 +02006023 return kvm_x86_ops->vcpu_create(kvm, id);
6024}
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006025
Avi Kivity26e52152007-11-20 15:30:24 +02006026int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
6027{
6028 int r;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006029
Sheng Yang0bed3b52008-10-09 16:01:54 +08006030 vcpu->arch.mtrr_state.have_fixed = 1;
Michael S. Tsirkin9fc77442012-09-16 11:50:30 +03006031 r = vcpu_load(vcpu);
6032 if (r)
6033 return r;
Jan Kiszka8b6e4542012-09-20 07:43:08 +02006034 r = kvm_vcpu_reset(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006035 if (r == 0)
6036 r = kvm_mmu_setup(vcpu);
6037 vcpu_put(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006038
Avi Kivity26e52152007-11-20 15:30:24 +02006039 return r;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006040}
6041
Hollis Blanchardd40ccc62007-11-19 14:04:43 -06006042void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006043{
Michael S. Tsirkin9fc77442012-09-16 11:50:30 +03006044 int r;
Gleb Natapov344d9582010-10-14 11:22:50 +02006045 vcpu->arch.apf.msr_val = 0;
6046
Michael S. Tsirkin9fc77442012-09-16 11:50:30 +03006047 r = vcpu_load(vcpu);
6048 BUG_ON(r);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006049 kvm_mmu_unload(vcpu);
6050 vcpu_put(vcpu);
6051
Sheng Yang98918832010-05-17 17:08:28 +08006052 fx_free(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006053 kvm_x86_ops->vcpu_free(vcpu);
6054}
6055
Jan Kiszka8b6e4542012-09-20 07:43:08 +02006056static int kvm_vcpu_reset(struct kvm_vcpu *vcpu)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006057{
Avi Kivity7460fb4a2011-09-20 13:43:14 +03006058 atomic_set(&vcpu->arch.nmi_queued, 0);
6059 vcpu->arch.nmi_pending = 0;
Jan Kiszka448fa4a2008-09-26 09:30:48 +02006060 vcpu->arch.nmi_injected = false;
6061
Jan Kiszka42dbaa52008-12-15 13:52:10 +01006062 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
6063 vcpu->arch.dr6 = DR6_FIXED_1;
6064 vcpu->arch.dr7 = DR7_FIXED_1;
Jan Kiszkac8639012012-09-21 05:42:55 +02006065 kvm_update_dr7(vcpu);
Jan Kiszka42dbaa52008-12-15 13:52:10 +01006066
Avi Kivity3842d132010-07-27 12:30:24 +03006067 kvm_make_request(KVM_REQ_EVENT, vcpu);
Gleb Natapov344d9582010-10-14 11:22:50 +02006068 vcpu->arch.apf.msr_val = 0;
Glauber Costac9aaa892011-07-11 15:28:14 -04006069 vcpu->arch.st.msr_val = 0;
Avi Kivity3842d132010-07-27 12:30:24 +03006070
Glauber Costa12f9a482011-02-01 14:16:40 -05006071 kvmclock_reset(vcpu);
6072
Gleb Natapovaf585b92010-10-14 11:22:46 +02006073 kvm_clear_async_pf_completion_queue(vcpu);
6074 kvm_async_pf_hash_reset(vcpu);
6075 vcpu->arch.apf.halted = false;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006076
Gleb Natapovf5132b02011-11-10 14:57:22 +02006077 kvm_pmu_reset(vcpu);
6078
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006079 return kvm_x86_ops->vcpu_reset(vcpu);
6080}
6081
Alexander Graf10474ae2009-09-15 11:37:46 +02006082int kvm_arch_hardware_enable(void *garbage)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006083{
Zachary Amsdenca84d1a2010-08-19 22:07:28 -10006084 struct kvm *kvm;
6085 struct kvm_vcpu *vcpu;
6086 int i;
Zachary Amsden0dd6a6e2012-02-03 15:43:56 -02006087 int ret;
6088 u64 local_tsc;
6089 u64 max_tsc = 0;
6090 bool stable, backwards_tsc = false;
Avi Kivity18863bd2009-09-07 11:12:18 +03006091
6092 kvm_shared_msr_cpu_online();
Zachary Amsden0dd6a6e2012-02-03 15:43:56 -02006093 ret = kvm_x86_ops->hardware_enable(garbage);
6094 if (ret != 0)
6095 return ret;
6096
6097 local_tsc = native_read_tsc();
6098 stable = !check_tsc_unstable();
6099 list_for_each_entry(kvm, &vm_list, vm_list) {
6100 kvm_for_each_vcpu(i, vcpu, kvm) {
6101 if (!stable && vcpu->cpu == smp_processor_id())
6102 set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests);
6103 if (stable && vcpu->arch.last_host_tsc > local_tsc) {
6104 backwards_tsc = true;
6105 if (vcpu->arch.last_host_tsc > max_tsc)
6106 max_tsc = vcpu->arch.last_host_tsc;
6107 }
6108 }
6109 }
6110
6111 /*
6112 * Sometimes, even reliable TSCs go backwards. This happens on
6113 * platforms that reset TSC during suspend or hibernate actions, but
6114 * maintain synchronization. We must compensate. Fortunately, we can
6115 * detect that condition here, which happens early in CPU bringup,
6116 * before any KVM threads can be running. Unfortunately, we can't
6117 * bring the TSCs fully up to date with real time, as we aren't yet far
6118 * enough into CPU bringup that we know how much real time has actually
6119 * elapsed; our helper function, get_kernel_ns() will be using boot
6120 * variables that haven't been updated yet.
6121 *
6122 * So we simply find the maximum observed TSC above, then record the
6123 * adjustment to TSC in each VCPU. When the VCPU later gets loaded,
6124 * the adjustment will be applied. Note that we accumulate
6125 * adjustments, in case multiple suspend cycles happen before some VCPU
6126 * gets a chance to run again. In the event that no KVM threads get a
6127 * chance to run, we will miss the entire elapsed period, as we'll have
6128 * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may
6129 * loose cycle time. This isn't too big a deal, since the loss will be
6130 * uniform across all VCPUs (not to mention the scenario is extremely
6131 * unlikely). It is possible that a second hibernate recovery happens
6132 * much faster than a first, causing the observed TSC here to be
6133 * smaller; this would require additional padding adjustment, which is
6134 * why we set last_host_tsc to the local tsc observed here.
6135 *
6136 * N.B. - this code below runs only on platforms with reliable TSC,
6137 * as that is the only way backwards_tsc is set above. Also note
6138 * that this runs for ALL vcpus, which is not a bug; all VCPUs should
6139 * have the same delta_cyc adjustment applied if backwards_tsc
6140 * is detected. Note further, this adjustment is only done once,
6141 * as we reset last_host_tsc on all VCPUs to stop this from being
6142 * called multiple times (one for each physical CPU bringup).
6143 *
Guo Chao4a969982012-06-28 15:17:27 +08006144 * Platforms with unreliable TSCs don't have to deal with this, they
Zachary Amsden0dd6a6e2012-02-03 15:43:56 -02006145 * will be compensated by the logic in vcpu_load, which sets the TSC to
6146 * catchup mode. This will catchup all VCPUs to real time, but cannot
6147 * guarantee that they stay in perfect synchronization.
6148 */
6149 if (backwards_tsc) {
6150 u64 delta_cyc = max_tsc - local_tsc;
6151 list_for_each_entry(kvm, &vm_list, vm_list) {
6152 kvm_for_each_vcpu(i, vcpu, kvm) {
6153 vcpu->arch.tsc_offset_adjustment += delta_cyc;
6154 vcpu->arch.last_host_tsc = local_tsc;
6155 }
6156
6157 /*
6158 * We have to disable TSC offset matching.. if you were
6159 * booting a VM while issuing an S4 host suspend....
6160 * you may have some problem. Solving this issue is
6161 * left as an exercise to the reader.
6162 */
6163 kvm->arch.last_tsc_nsec = 0;
6164 kvm->arch.last_tsc_write = 0;
6165 }
6166
6167 }
6168 return 0;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006169}
6170
6171void kvm_arch_hardware_disable(void *garbage)
6172{
6173 kvm_x86_ops->hardware_disable(garbage);
Avi Kivity3548bab2009-11-28 14:18:47 +02006174 drop_user_return_notifiers(garbage);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006175}
6176
6177int kvm_arch_hardware_setup(void)
6178{
6179 return kvm_x86_ops->hardware_setup();
6180}
6181
6182void kvm_arch_hardware_unsetup(void)
6183{
6184 kvm_x86_ops->hardware_unsetup();
6185}
6186
6187void kvm_arch_check_processor_compat(void *rtn)
6188{
6189 kvm_x86_ops->check_processor_compatibility(rtn);
6190}
6191
Avi Kivity3e515702012-03-05 14:23:29 +02006192bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu)
6193{
6194 return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL);
6195}
6196
Gleb Natapov54e98182012-08-05 15:58:32 +03006197struct static_key kvm_no_apic_vcpu __read_mostly;
6198
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006199int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
6200{
6201 struct page *page;
6202 struct kvm *kvm;
6203 int r;
6204
6205 BUG_ON(vcpu->kvm == NULL);
6206 kvm = vcpu->kvm;
6207
Avi Kivity9aabc88f2010-07-29 15:11:50 +03006208 vcpu->arch.emulate_ctxt.ops = &emulate_ops;
Gleb Natapovc5af89b2009-06-09 15:56:26 +03006209 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
Avi Kivitya4535292008-04-13 17:54:35 +03006210 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006211 else
Avi Kivitya4535292008-04-13 17:54:35 +03006212 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006213
6214 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
6215 if (!page) {
6216 r = -ENOMEM;
6217 goto fail;
6218 }
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006219 vcpu->arch.pio_data = page_address(page);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006220
Zachary Amsdencc578282012-02-03 15:43:50 -02006221 kvm_set_tsc_khz(vcpu, max_tsc_khz);
Zachary Amsdenc2855452010-09-18 14:38:15 -10006222
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006223 r = kvm_mmu_create(vcpu);
6224 if (r < 0)
6225 goto fail_free_pio_data;
6226
6227 if (irqchip_in_kernel(kvm)) {
6228 r = kvm_create_lapic(vcpu);
6229 if (r < 0)
6230 goto fail_mmu_destroy;
Gleb Natapov54e98182012-08-05 15:58:32 +03006231 } else
6232 static_key_slow_inc(&kvm_no_apic_vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006233
Huang Ying890ca9a2009-05-11 16:48:15 +08006234 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
6235 GFP_KERNEL);
6236 if (!vcpu->arch.mce_banks) {
6237 r = -ENOMEM;
Wei Yongjun443c39b2010-01-22 14:21:29 +08006238 goto fail_free_lapic;
Huang Ying890ca9a2009-05-11 16:48:15 +08006239 }
6240 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
6241
Sheng Yangf5f48ee2010-06-30 12:25:15 +08006242 if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL))
6243 goto fail_free_mce_banks;
6244
Gleb Natapovaf585b92010-10-14 11:22:46 +02006245 kvm_async_pf_hash_reset(vcpu);
Gleb Natapovf5132b02011-11-10 14:57:22 +02006246 kvm_pmu_init(vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006247
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006248 return 0;
Sheng Yangf5f48ee2010-06-30 12:25:15 +08006249fail_free_mce_banks:
6250 kfree(vcpu->arch.mce_banks);
Wei Yongjun443c39b2010-01-22 14:21:29 +08006251fail_free_lapic:
6252 kvm_free_lapic(vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006253fail_mmu_destroy:
6254 kvm_mmu_destroy(vcpu);
6255fail_free_pio_data:
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006256 free_page((unsigned long)vcpu->arch.pio_data);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006257fail:
6258 return r;
6259}
6260
6261void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
6262{
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006263 int idx;
6264
Gleb Natapovf5132b02011-11-10 14:57:22 +02006265 kvm_pmu_destroy(vcpu);
Wei Yongjun36cb93f2010-01-22 14:18:47 +08006266 kfree(vcpu->arch.mce_banks);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006267 kvm_free_lapic(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006268 idx = srcu_read_lock(&vcpu->kvm->srcu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006269 kvm_mmu_destroy(vcpu);
Marcelo Tosattif656ce02009-12-23 14:35:25 -02006270 srcu_read_unlock(&vcpu->kvm->srcu, idx);
Zhang Xiantaoad312c72007-12-13 23:50:52 +08006271 free_page((unsigned long)vcpu->arch.pio_data);
Gleb Natapov54e98182012-08-05 15:58:32 +03006272 if (!irqchip_in_kernel(vcpu->kvm))
6273 static_key_slow_dec(&kvm_no_apic_vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08006274}
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006275
Carsten Ottee08b9632012-01-04 10:25:20 +01006276int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006277{
Carsten Ottee08b9632012-01-04 10:25:20 +01006278 if (type)
6279 return -EINVAL;
6280
Zhang Xiantaof05e70a2007-12-14 10:01:48 +08006281 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +03006282 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006283
Sheng Yang5550af42008-10-15 20:15:06 +08006284 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
6285 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
Alex Williamson7a844282012-09-21 11:58:03 -06006286 /* Reserve bit 1 of irq_sources_bitmap for irqfd-resampler */
6287 set_bit(KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID,
6288 &kvm->arch.irq_sources_bitmap);
Sheng Yang5550af42008-10-15 20:15:06 +08006289
Jan Kiszka038f8c12011-02-04 10:49:11 +01006290 raw_spin_lock_init(&kvm->arch.tsc_write_lock);
Gleb Natapov1e08ec42012-09-13 17:19:24 +03006291 mutex_init(&kvm->arch.apic_map_lock);
Marcelo Tosatti53f658b32008-12-11 20:45:05 +01006292
Jan Kiszkad89f5ef2010-11-09 17:02:49 +01006293 return 0;
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006294}
6295
6296static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
6297{
Michael S. Tsirkin9fc77442012-09-16 11:50:30 +03006298 int r;
6299 r = vcpu_load(vcpu);
6300 BUG_ON(r);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006301 kvm_mmu_unload(vcpu);
6302 vcpu_put(vcpu);
6303}
6304
6305static void kvm_free_vcpus(struct kvm *kvm)
6306{
6307 unsigned int i;
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006308 struct kvm_vcpu *vcpu;
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006309
6310 /*
6311 * Unpin any mmu pages first.
6312 */
Gleb Natapovaf585b92010-10-14 11:22:46 +02006313 kvm_for_each_vcpu(i, vcpu, kvm) {
6314 kvm_clear_async_pf_completion_queue(vcpu);
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006315 kvm_unload_vcpu_mmu(vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006316 }
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006317 kvm_for_each_vcpu(i, vcpu, kvm)
6318 kvm_arch_vcpu_free(vcpu);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006319
Gleb Natapov988a2ca2009-06-09 15:56:29 +03006320 mutex_lock(&kvm->lock);
6321 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
6322 kvm->vcpus[i] = NULL;
6323
6324 atomic_set(&kvm->online_vcpus, 0);
6325 mutex_unlock(&kvm->lock);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006326}
6327
Sheng Yangad8ba2c2009-01-06 10:03:02 +08006328void kvm_arch_sync_events(struct kvm *kvm)
6329{
Sheng Yangba4cef32009-01-06 10:03:03 +08006330 kvm_free_all_assigned_devices(kvm);
Xiao Guangrongaea924f2010-07-10 17:37:56 +08006331 kvm_free_pit(kvm);
Sheng Yangad8ba2c2009-01-06 10:03:02 +08006332}
6333
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006334void kvm_arch_destroy_vm(struct kvm *kvm)
6335{
Sheng Yang6eb55812008-10-31 12:37:41 +08006336 kvm_iommu_unmap_guest(kvm);
Zhang Xiantaod7deeeb02007-12-14 10:17:34 +08006337 kfree(kvm->arch.vpic);
6338 kfree(kvm->arch.vioapic);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006339 kvm_free_vcpus(kvm);
Avi Kivity3d458302008-03-25 11:26:13 +02006340 if (kvm->arch.apic_access_page)
6341 put_page(kvm->arch.apic_access_page);
Sheng Yangb7ebfb02008-04-25 21:44:52 +08006342 if (kvm->arch.ept_identity_pagetable)
6343 put_page(kvm->arch.ept_identity_pagetable);
Gleb Natapov1e08ec42012-09-13 17:19:24 +03006344 kfree(rcu_dereference_check(kvm->arch.apic_map, 1));
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +08006345}
Zhang Xiantao0de10342007-11-20 16:25:04 +08006346
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006347void kvm_arch_free_memslot(struct kvm_memory_slot *free,
6348 struct kvm_memory_slot *dont)
6349{
6350 int i;
6351
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006352 for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) {
6353 if (!dont || free->arch.rmap[i] != dont->arch.rmap[i]) {
6354 kvm_kvfree(free->arch.rmap[i]);
6355 free->arch.rmap[i] = NULL;
Takuya Yoshikawa77d11302012-07-02 17:57:17 +09006356 }
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006357 if (i == 0)
6358 continue;
6359
6360 if (!dont || free->arch.lpage_info[i - 1] !=
6361 dont->arch.lpage_info[i - 1]) {
6362 kvm_kvfree(free->arch.lpage_info[i - 1]);
6363 free->arch.lpage_info[i - 1] = NULL;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006364 }
6365 }
6366}
6367
6368int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
6369{
6370 int i;
6371
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006372 for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) {
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006373 unsigned long ugfn;
6374 int lpages;
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006375 int level = i + 1;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006376
6377 lpages = gfn_to_index(slot->base_gfn + npages - 1,
6378 slot->base_gfn, level) + 1;
6379
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006380 slot->arch.rmap[i] =
6381 kvm_kvzalloc(lpages * sizeof(*slot->arch.rmap[i]));
6382 if (!slot->arch.rmap[i])
Takuya Yoshikawa77d11302012-07-02 17:57:17 +09006383 goto out_free;
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006384 if (i == 0)
6385 continue;
Takuya Yoshikawa77d11302012-07-02 17:57:17 +09006386
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006387 slot->arch.lpage_info[i - 1] = kvm_kvzalloc(lpages *
6388 sizeof(*slot->arch.lpage_info[i - 1]));
6389 if (!slot->arch.lpage_info[i - 1])
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006390 goto out_free;
6391
6392 if (slot->base_gfn & (KVM_PAGES_PER_HPAGE(level) - 1))
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006393 slot->arch.lpage_info[i - 1][0].write_count = 1;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006394 if ((slot->base_gfn + npages) & (KVM_PAGES_PER_HPAGE(level) - 1))
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006395 slot->arch.lpage_info[i - 1][lpages - 1].write_count = 1;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006396 ugfn = slot->userspace_addr >> PAGE_SHIFT;
6397 /*
6398 * If the gfn and userspace address are not aligned wrt each
6399 * other, or if explicitly asked to, disable large page
6400 * support for this slot
6401 */
6402 if ((slot->base_gfn ^ ugfn) & (KVM_PAGES_PER_HPAGE(level) - 1) ||
6403 !kvm_largepages_enabled()) {
6404 unsigned long j;
6405
6406 for (j = 0; j < lpages; ++j)
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006407 slot->arch.lpage_info[i - 1][j].write_count = 1;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006408 }
6409 }
6410
6411 return 0;
6412
6413out_free:
Takuya Yoshikawad89cc612012-08-01 18:03:28 +09006414 for (i = 0; i < KVM_NR_PAGE_SIZES; ++i) {
6415 kvm_kvfree(slot->arch.rmap[i]);
6416 slot->arch.rmap[i] = NULL;
6417 if (i == 0)
6418 continue;
6419
6420 kvm_kvfree(slot->arch.lpage_info[i - 1]);
6421 slot->arch.lpage_info[i - 1] = NULL;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +09006422 }
6423 return -ENOMEM;
6424}
6425
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006426int kvm_arch_prepare_memory_region(struct kvm *kvm,
6427 struct kvm_memory_slot *memslot,
Zhang Xiantao0de10342007-11-20 16:25:04 +08006428 struct kvm_memory_slot old,
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006429 struct kvm_userspace_memory_region *mem,
Zhang Xiantao0de10342007-11-20 16:25:04 +08006430 int user_alloc)
6431{
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006432 int npages = memslot->npages;
Avi Kivity7ac77092010-06-21 10:57:45 +03006433 int map_flags = MAP_PRIVATE | MAP_ANONYMOUS;
6434
6435 /* Prevent internal slot pages from being moved by fork()/COW. */
6436 if (memslot->id >= KVM_MEMORY_SLOTS)
6437 map_flags = MAP_SHARED | MAP_ANONYMOUS;
Zhang Xiantao0de10342007-11-20 16:25:04 +08006438
6439 /*To keep backward compatibility with older userspace,
Guo Chao4a969982012-06-28 15:17:27 +08006440 *x86 needs to handle !user_alloc case.
Zhang Xiantao0de10342007-11-20 16:25:04 +08006441 */
6442 if (!user_alloc) {
Takuya Yoshikawaaab2eb72012-08-01 18:01:10 +09006443 if (npages && !old.npages) {
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006444 unsigned long userspace_addr;
6445
Linus Torvalds6be5ceb2012-04-20 17:13:58 -07006446 userspace_addr = vm_mmap(NULL, 0,
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006447 npages * PAGE_SIZE,
6448 PROT_READ | PROT_WRITE,
Avi Kivity7ac77092010-06-21 10:57:45 +03006449 map_flags,
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006450 0);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006451
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006452 if (IS_ERR((void *)userspace_addr))
6453 return PTR_ERR((void *)userspace_addr);
6454
Andrea Arcangeli604b38a2008-07-25 16:32:03 +02006455 memslot->userspace_addr = userspace_addr;
Zhang Xiantao0de10342007-11-20 16:25:04 +08006456 }
6457 }
6458
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006459
6460 return 0;
6461}
6462
6463void kvm_arch_commit_memory_region(struct kvm *kvm,
6464 struct kvm_userspace_memory_region *mem,
6465 struct kvm_memory_slot old,
6466 int user_alloc)
6467{
6468
Xiao Guangrong48c0e4e2011-03-04 18:59:21 +08006469 int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT;
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006470
Takuya Yoshikawaaab2eb72012-08-01 18:01:10 +09006471 if (!user_alloc && !old.user_alloc && old.npages && !npages) {
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006472 int ret;
6473
Al Virobfce2812012-04-20 21:57:04 -04006474 ret = vm_munmap(old.userspace_addr,
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006475 old.npages * PAGE_SIZE);
Marcelo Tosattif7784b82009-12-23 14:35:18 -02006476 if (ret < 0)
6477 printk(KERN_WARNING
6478 "kvm_vm_ioctl_set_memory_region: "
6479 "failed to munmap memory\n");
6480 }
6481
Xiao Guangrong48c0e4e2011-03-04 18:59:21 +08006482 if (!kvm->arch.n_requested_mmu_pages)
6483 nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006484
Xiao Guangrong48c0e4e2011-03-04 18:59:21 +08006485 spin_lock(&kvm->mmu_lock);
6486 if (nr_mmu_pages)
6487 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
Zhang Xiantao0de10342007-11-20 16:25:04 +08006488 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
Marcelo Tosatti7c8a83b2009-05-12 18:55:43 -03006489 spin_unlock(&kvm->mmu_lock);
Marcelo Tosatti3b4dc3a2012-08-28 17:43:26 -03006490 /*
6491 * If memory slot is created, or moved, we need to clear all
6492 * mmio sptes.
6493 */
6494 if (npages && old.base_gfn != mem->guest_phys_addr >> PAGE_SHIFT) {
6495 kvm_mmu_zap_all(kvm);
6496 kvm_reload_remote_mmus(kvm);
6497 }
Zhang Xiantao0de10342007-11-20 16:25:04 +08006498}
Zhang Xiantao1d737c82007-12-14 09:35:10 +08006499
Marcelo Tosatti2df72e92012-08-24 15:54:57 -03006500void kvm_arch_flush_shadow_all(struct kvm *kvm)
Marcelo Tosatti34d4cb82008-07-10 20:49:31 -03006501{
6502 kvm_mmu_zap_all(kvm);
Marcelo Tosatti8986ecc2009-05-12 18:55:45 -03006503 kvm_reload_remote_mmus(kvm);
Marcelo Tosatti34d4cb82008-07-10 20:49:31 -03006504}
6505
Marcelo Tosatti2df72e92012-08-24 15:54:57 -03006506void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
6507 struct kvm_memory_slot *slot)
6508{
6509 kvm_arch_flush_shadow_all(kvm);
6510}
6511
Zhang Xiantao1d737c82007-12-14 09:35:10 +08006512int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
6513{
Gleb Natapovaf585b92010-10-14 11:22:46 +02006514 return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
6515 !vcpu->arch.apf.halted)
6516 || !list_empty_careful(&vcpu->async_pf.done)
Gleb Natapova1b37102009-07-09 15:33:52 +03006517 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
Avi Kivity7460fb4a2011-09-20 13:43:14 +03006518 || atomic_read(&vcpu->arch.nmi_queued) ||
Gleb Natapova1b37102009-07-09 15:33:52 +03006519 (kvm_arch_interrupt_allowed(vcpu) &&
6520 kvm_cpu_has_interrupt(vcpu));
Zhang Xiantao1d737c82007-12-14 09:35:10 +08006521}
Zhang Xiantao57361992007-12-17 14:21:40 +08006522
Christoffer Dallb6d33832012-03-08 16:44:24 -05006523int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
Zhang Xiantao57361992007-12-17 14:21:40 +08006524{
Christoffer Dallb6d33832012-03-08 16:44:24 -05006525 return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
Zhang Xiantao57361992007-12-17 14:21:40 +08006526}
Gleb Natapov78646122009-03-23 12:12:11 +02006527
6528int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
6529{
6530 return kvm_x86_ops->interrupt_allowed(vcpu);
6531}
Marcelo Tosatti229456f2009-06-17 09:22:14 -03006532
Jan Kiszkaf92653e2010-02-23 17:47:55 +01006533bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
6534{
6535 unsigned long current_rip = kvm_rip_read(vcpu) +
6536 get_segment_base(vcpu, VCPU_SREG_CS);
6537
6538 return current_rip == linear_rip;
6539}
6540EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
6541
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006542unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
6543{
6544 unsigned long rflags;
6545
6546 rflags = kvm_x86_ops->get_rflags(vcpu);
6547 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
Jan Kiszkac310bac2010-02-23 17:47:58 +01006548 rflags &= ~X86_EFLAGS_TF;
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006549 return rflags;
6550}
6551EXPORT_SYMBOL_GPL(kvm_get_rflags);
6552
6553void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
6554{
6555 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
Jan Kiszkaf92653e2010-02-23 17:47:55 +01006556 kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
Jan Kiszkac310bac2010-02-23 17:47:58 +01006557 rflags |= X86_EFLAGS_TF;
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006558 kvm_x86_ops->set_rflags(vcpu, rflags);
Avi Kivity3842d132010-07-27 12:30:24 +03006559 kvm_make_request(KVM_REQ_EVENT, vcpu);
Jan Kiszka94fe45d2009-10-18 13:24:44 +02006560}
6561EXPORT_SYMBOL_GPL(kvm_set_rflags);
6562
Gleb Natapov56028d02010-10-17 18:13:42 +02006563void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
6564{
6565 int r;
6566
Xiao Guangrongfb67e142010-12-07 10:35:25 +08006567 if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) ||
Xiao Guangrongc4806ac2010-11-12 14:49:55 +08006568 is_error_page(work->page))
Gleb Natapov56028d02010-10-17 18:13:42 +02006569 return;
6570
6571 r = kvm_mmu_reload(vcpu);
6572 if (unlikely(r))
6573 return;
6574
Xiao Guangrongfb67e142010-12-07 10:35:25 +08006575 if (!vcpu->arch.mmu.direct_map &&
6576 work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu))
6577 return;
6578
Gleb Natapov56028d02010-10-17 18:13:42 +02006579 vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true);
6580}
6581
Gleb Natapovaf585b92010-10-14 11:22:46 +02006582static inline u32 kvm_async_pf_hash_fn(gfn_t gfn)
6583{
6584 return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU));
6585}
6586
6587static inline u32 kvm_async_pf_next_probe(u32 key)
6588{
6589 return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1);
6590}
6591
6592static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6593{
6594 u32 key = kvm_async_pf_hash_fn(gfn);
6595
6596 while (vcpu->arch.apf.gfns[key] != ~0)
6597 key = kvm_async_pf_next_probe(key);
6598
6599 vcpu->arch.apf.gfns[key] = gfn;
6600}
6601
6602static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn)
6603{
6604 int i;
6605 u32 key = kvm_async_pf_hash_fn(gfn);
6606
6607 for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) &&
Xiao Guangrongc7d28c22010-11-01 17:00:30 +08006608 (vcpu->arch.apf.gfns[key] != gfn &&
6609 vcpu->arch.apf.gfns[key] != ~0); i++)
Gleb Natapovaf585b92010-10-14 11:22:46 +02006610 key = kvm_async_pf_next_probe(key);
6611
6612 return key;
6613}
6614
6615bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6616{
6617 return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn;
6618}
6619
6620static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6621{
6622 u32 i, j, k;
6623
6624 i = j = kvm_async_pf_gfn_slot(vcpu, gfn);
6625 while (true) {
6626 vcpu->arch.apf.gfns[i] = ~0;
6627 do {
6628 j = kvm_async_pf_next_probe(j);
6629 if (vcpu->arch.apf.gfns[j] == ~0)
6630 return;
6631 k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]);
6632 /*
6633 * k lies cyclically in ]i,j]
6634 * | i.k.j |
6635 * |....j i.k.| or |.k..j i...|
6636 */
6637 } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j));
6638 vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j];
6639 i = j;
6640 }
6641}
6642
Gleb Natapov7c907052010-10-14 11:22:53 +02006643static int apf_put_user(struct kvm_vcpu *vcpu, u32 val)
6644{
6645
6646 return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val,
6647 sizeof(val));
6648}
6649
Gleb Natapovaf585b92010-10-14 11:22:46 +02006650void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
6651 struct kvm_async_pf *work)
6652{
Avi Kivity6389ee92010-11-29 16:12:30 +02006653 struct x86_exception fault;
6654
Gleb Natapov7c907052010-10-14 11:22:53 +02006655 trace_kvm_async_pf_not_present(work->arch.token, work->gva);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006656 kvm_add_async_pf_gfn(vcpu, work->arch.gfn);
Gleb Natapov7c907052010-10-14 11:22:53 +02006657
6658 if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) ||
Gleb Natapovfc5f06f2010-10-14 11:22:56 +02006659 (vcpu->arch.apf.send_user_only &&
6660 kvm_x86_ops->get_cpl(vcpu) == 0))
Gleb Natapov7c907052010-10-14 11:22:53 +02006661 kvm_make_request(KVM_REQ_APF_HALT, vcpu);
6662 else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) {
Avi Kivity6389ee92010-11-29 16:12:30 +02006663 fault.vector = PF_VECTOR;
6664 fault.error_code_valid = true;
6665 fault.error_code = 0;
6666 fault.nested_page_fault = false;
6667 fault.address = work->arch.token;
6668 kvm_inject_page_fault(vcpu, &fault);
Gleb Natapov7c907052010-10-14 11:22:53 +02006669 }
Gleb Natapovaf585b92010-10-14 11:22:46 +02006670}
6671
6672void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
6673 struct kvm_async_pf *work)
6674{
Avi Kivity6389ee92010-11-29 16:12:30 +02006675 struct x86_exception fault;
6676
Gleb Natapov7c907052010-10-14 11:22:53 +02006677 trace_kvm_async_pf_ready(work->arch.token, work->gva);
6678 if (is_error_page(work->page))
6679 work->arch.token = ~0; /* broadcast wakeup */
6680 else
6681 kvm_del_async_pf_gfn(vcpu, work->arch.gfn);
6682
6683 if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) &&
6684 !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) {
Avi Kivity6389ee92010-11-29 16:12:30 +02006685 fault.vector = PF_VECTOR;
6686 fault.error_code_valid = true;
6687 fault.error_code = 0;
6688 fault.nested_page_fault = false;
6689 fault.address = work->arch.token;
6690 kvm_inject_page_fault(vcpu, &fault);
Gleb Natapov7c907052010-10-14 11:22:53 +02006691 }
Xiao Guangronge6d53e32010-11-01 17:01:28 +08006692 vcpu->arch.apf.halted = false;
Gleb Natapova4fa1632012-05-03 11:36:39 +03006693 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
Gleb Natapov7c907052010-10-14 11:22:53 +02006694}
6695
6696bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
6697{
6698 if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED))
6699 return true;
6700 else
6701 return !kvm_event_needs_reinjection(vcpu) &&
6702 kvm_x86_ops->interrupt_allowed(vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +02006703}
6704
Marcelo Tosatti229456f2009-06-17 09:22:14 -03006705EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
6706EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
6707EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
6708EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
6709EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
Joerg Roedel0ac406d2009-10-09 16:08:27 +02006710EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
Joerg Roedeld8cabdd2009-10-09 16:08:28 +02006711EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
Joerg Roedel17897f362009-10-09 16:08:29 +02006712EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
Joerg Roedel236649d2009-10-09 16:08:30 +02006713EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
Joerg Roedelec1ff792009-10-09 16:08:31 +02006714EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
Joerg Roedel532a46b2009-10-09 16:08:32 +02006715EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
Joerg Roedel2e554e82010-02-24 18:59:14 +01006716EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);