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KVM: Dont mark TSC unstable due to S4 suspend
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86 / kvm / x86.c
CommitLineData
043405e1
CO		 1/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * derived from drivers/kvm/kvm_main.c
5 *
6 * Copyright (C) 2006 Qumranet, Inc.
4d5c5d0f
BAY		 7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
9611c187 9 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
043405e1
CO		 10 *
11 * Authors:
12 * Avi Kivity <avi@qumranet.com>
13 * Yaniv Kamay <yaniv@qumranet.com>
4d5c5d0f
BAY		 14 * Amit Shah <amit.shah@qumranet.com>
15 * Ben-Ami Yassour <benami@il.ibm.com>
043405e1
CO		 16 *
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
edf88417 22#include <linux/kvm_host.h>
313a3dc7 23#include "irq.h"
1d737c8a 24#include "mmu.h"
7837699f 25#include "i8254.h"
37817f29 26#include "tss.h"
5fdbf976 27#include "kvm_cache_regs.h"
26eef70c 28#include "x86.h"
00b27a3e 29#include "cpuid.h"
313a3dc7 30
18068523 31#include <linux/clocksource.h>
4d5c5d0f 32#include <linux/interrupt.h>
313a3dc7
CO		 33#include <linux/kvm.h>
34#include <linux/fs.h>
35#include <linux/vmalloc.h>
5fb76f9b 36#include <linux/module.h>
0de10343 37#include <linux/mman.h>
2bacc55c 38#include <linux/highmem.h>
19de40a8 39#include <linux/iommu.h>
62c476c7 40#include <linux/intel-iommu.h>
c8076604 41#include <linux/cpufreq.h>
18863bdd 42#include <linux/user-return-notifier.h>
a983fb23 43#include <linux/srcu.h>
5a0e3ad6 44#include <linux/slab.h>
ff9d07a0 45#include <linux/perf_event.h>
7bee342a 46#include <linux/uaccess.h>
af585b92 47#include <linux/hash.h>
a1b60c1c 48#include <linux/pci.h>
aec51dc4 49#include <trace/events/kvm.h>
2ed152af 50
229456fc
MT		 51#define CREATE_TRACE_POINTS
52#include "trace.h"
043405e1 53
24f1e32c 54#include <asm/debugreg.h>
d825ed0a 55#include <asm/msr.h>
a5f61300 56#include <asm/desc.h>
0bed3b56 57#include <asm/mtrr.h>
890ca9ae 58#include <asm/mce.h>
7cf30855 59#include <asm/i387.h>
98918833 60#include <asm/xcr.h>
1d5f066e 61#include <asm/pvclock.h>
217fc9cf 62#include <asm/div64.h>
043405e1 63
313a3dc7 64#define MAX_IO_MSRS 256
890ca9ae 65#define KVM_MAX_MCE_BANKS 32
5854dbca 66#define KVM_MCE_CAP_SUPPORTED (MCG_CTL_P | MCG_SER_P)
890ca9ae 67
0f65dd70
AK		 68#define emul_to_vcpu(ctxt) \
69 container_of(ctxt, struct kvm_vcpu, arch.emulate_ctxt)
70
50a37eb4
JR		 71/* EFER defaults:
72 * - enable syscall per default because its emulated by KVM
73 * - enable LME and LMA per default on 64 bit KVM
74 */
75#ifdef CONFIG_X86_64
1260edbe
LJ		 76static
77u64 __read_mostly efer_reserved_bits = ~((u64)(EFER_SCE | EFER_LME | EFER_LMA));
50a37eb4 78#else
1260edbe 79static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE);
50a37eb4 80#endif
313a3dc7 81
ba1389b7
AK		 82#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
83#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
417bc304 84
cb142eb7 85static void update_cr8_intercept(struct kvm_vcpu *vcpu);
7460fb4a 86static void process_nmi(struct kvm_vcpu *vcpu);
674eea0f 87
97896d04 88struct kvm_x86_ops *kvm_x86_ops;
5fdbf976 89EXPORT_SYMBOL_GPL(kvm_x86_ops);
97896d04 90
476bc001
RR		 91static bool ignore_msrs = 0;
92module_param(ignore_msrs, bool, S_IRUGO | S_IWUSR);
ed85c068 93
92a1f12d
JR		 94bool kvm_has_tsc_control;
95EXPORT_SYMBOL_GPL(kvm_has_tsc_control);
96u32 kvm_max_guest_tsc_khz;
97EXPORT_SYMBOL_GPL(kvm_max_guest_tsc_khz);
98
cc578287
ZA		 99/* tsc tolerance in parts per million - default to 1/2 of the NTP threshold */
100static u32 tsc_tolerance_ppm = 250;
101module_param(tsc_tolerance_ppm, uint, S_IRUGO | S_IWUSR);
102
18863bdd
AK		 103#define KVM_NR_SHARED_MSRS 16
104
105struct kvm_shared_msrs_global {
106 int nr;
2bf78fa7 107 u32 msrs[KVM_NR_SHARED_MSRS];
18863bdd
AK		 108};
109
110struct kvm_shared_msrs {
111 struct user_return_notifier urn;
112 bool registered;
2bf78fa7
SY		 113 struct kvm_shared_msr_values {
114 u64 host;
115 u64 curr;
116 } values[KVM_NR_SHARED_MSRS];
18863bdd
AK		 117};
118
119static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
120static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
121
417bc304 122struct kvm_stats_debugfs_item debugfs_entries[] = {
ba1389b7
AK		 123 { "pf_fixed", VCPU_STAT(pf_fixed) },
124 { "pf_guest", VCPU_STAT(pf_guest) },
125 { "tlb_flush", VCPU_STAT(tlb_flush) },
126 { "invlpg", VCPU_STAT(invlpg) },
127 { "exits", VCPU_STAT(exits) },
128 { "io_exits", VCPU_STAT(io_exits) },
129 { "mmio_exits", VCPU_STAT(mmio_exits) },
130 { "signal_exits", VCPU_STAT(signal_exits) },
131 { "irq_window", VCPU_STAT(irq_window_exits) },
f08864b4 132 { "nmi_window", VCPU_STAT(nmi_window_exits) },
ba1389b7
AK		 133 { "halt_exits", VCPU_STAT(halt_exits) },
134 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
f11c3a8d 135 { "hypercalls", VCPU_STAT(hypercalls) },
ba1389b7
AK		 136 { "request_irq", VCPU_STAT(request_irq_exits) },
137 { "irq_exits", VCPU_STAT(irq_exits) },
138 { "host_state_reload", VCPU_STAT(host_state_reload) },
139 { "efer_reload", VCPU_STAT(efer_reload) },
140 { "fpu_reload", VCPU_STAT(fpu_reload) },
141 { "insn_emulation", VCPU_STAT(insn_emulation) },
142 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
fa89a817 143 { "irq_injections", VCPU_STAT(irq_injections) },
c4abb7c9 144 { "nmi_injections", VCPU_STAT(nmi_injections) },
4cee5764
AK		 145 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
146 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
147 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
148 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
149 { "mmu_flooded", VM_STAT(mmu_flooded) },
150 { "mmu_recycled", VM_STAT(mmu_recycled) },
dfc5aa00 151 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
4731d4c7 152 { "mmu_unsync", VM_STAT(mmu_unsync) },
0f74a24c 153 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
05da4558 154 { "largepages", VM_STAT(lpages) },
417bc304
HB		 155 { NULL }
156};
157
2acf923e
DC		 158u64 __read_mostly host_xcr0;
159
d6aa1000
AK		 160int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt);
161
af585b92
GN		 162static inline void kvm_async_pf_hash_reset(struct kvm_vcpu *vcpu)
163{
164 int i;
165 for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU); i++)
166 vcpu->arch.apf.gfns[i] = ~0;
167}
168
18863bdd
AK		 169static void kvm_on_user_return(struct user_return_notifier *urn)
170{
171 unsigned slot;
18863bdd
AK		 172 struct kvm_shared_msrs *locals
173 = container_of(urn, struct kvm_shared_msrs, urn);
2bf78fa7 174 struct kvm_shared_msr_values *values;
18863bdd
AK		 175
176 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
2bf78fa7
SY		 177 values = &locals->values[slot];
178 if (values->host != values->curr) {
179 wrmsrl(shared_msrs_global.msrs[slot], values->host);
180 values->curr = values->host;
18863bdd
AK		 181 }
182 }
183 locals->registered = false;
184 user_return_notifier_unregister(urn);
185}
186
2bf78fa7 187static void shared_msr_update(unsigned slot, u32 msr)
18863bdd 188{
2bf78fa7 189 struct kvm_shared_msrs *smsr;
18863bdd
AK		 190 u64 value;
191
2bf78fa7
SY		 192 smsr = &__get_cpu_var(shared_msrs);
193 /* only read, and nobody should modify it at this time,
194 * so don't need lock */
195 if (slot >= shared_msrs_global.nr) {
196 printk(KERN_ERR "kvm: invalid MSR slot!");
197 return;
198 }
199 rdmsrl_safe(msr, &value);
200 smsr->values[slot].host = value;
201 smsr->values[slot].curr = value;
202}
203
204void kvm_define_shared_msr(unsigned slot, u32 msr)
205{
18863bdd
AK		 206 if (slot >= shared_msrs_global.nr)
207 shared_msrs_global.nr = slot + 1;
2bf78fa7
SY		 208 shared_msrs_global.msrs[slot] = msr;
209 /* we need ensured the shared_msr_global have been updated */
210 smp_wmb();
18863bdd
AK		 211}
212EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
213
214static void kvm_shared_msr_cpu_online(void)
215{
216 unsigned i;
18863bdd
AK		 217
218 for (i = 0; i < shared_msrs_global.nr; ++i)
2bf78fa7 219 shared_msr_update(i, shared_msrs_global.msrs[i]);
18863bdd
AK		 220}
221
d5696725 222void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
18863bdd
AK		 223{
224 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
225
2bf78fa7 226 if (((value ^ smsr->values[slot].curr) & mask) == 0)
18863bdd 227 return;
2bf78fa7
SY		 228 smsr->values[slot].curr = value;
229 wrmsrl(shared_msrs_global.msrs[slot], value);
18863bdd
AK		 230 if (!smsr->registered) {
231 smsr->urn.on_user_return = kvm_on_user_return;
232 user_return_notifier_register(&smsr->urn);
233 smsr->registered = true;
234 }
235}
236EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
237
3548bab5
AK		 238static void drop_user_return_notifiers(void *ignore)
239{
240 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
241
242 if (smsr->registered)
243 kvm_on_user_return(&smsr->urn);
244}
245
6866b83e
CO		 246u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
247{
248 if (irqchip_in_kernel(vcpu->kvm))
ad312c7c 249 return vcpu->arch.apic_base;
6866b83e 250 else
ad312c7c 251 return vcpu->arch.apic_base;
6866b83e
CO		 252}
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 */
258 if (irqchip_in_kernel(vcpu->kvm))
259 kvm_lapic_set_base(vcpu, data);
260 else
ad312c7c 261 vcpu->arch.apic_base = data;
6866b83e
CO		 262}
263EXPORT_SYMBOL_GPL(kvm_set_apic_base);
264
3fd28fce
ED		 265#define EXCPT_BENIGN 0
266#define EXCPT_CONTRIBUTORY 1
267#define EXCPT_PF 2
268
269static int exception_class(int vector)
270{
271 switch (vector) {
272 case PF_VECTOR:
273 return EXCPT_PF;
274 case DE_VECTOR:
275 case TS_VECTOR:
276 case NP_VECTOR:
277 case SS_VECTOR:
278 case GP_VECTOR:
279 return EXCPT_CONTRIBUTORY;
280 default:
281 break;
282 }
283 return EXCPT_BENIGN;
284}
285
286static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
ce7ddec4
JR		 287 unsigned nr, bool has_error, u32 error_code,
288 bool reinject)
3fd28fce
ED		 289{
290 u32 prev_nr;
291 int class1, class2;
292
3842d135
AK		 293 kvm_make_request(KVM_REQ_EVENT, vcpu);
294
3fd28fce
ED		 295 if (!vcpu->arch.exception.pending) {
296 queue:
297 vcpu->arch.exception.pending = true;
298 vcpu->arch.exception.has_error_code = has_error;
299 vcpu->arch.exception.nr = nr;
300 vcpu->arch.exception.error_code = error_code;
3f0fd292 301 vcpu->arch.exception.reinject = reinject;
3fd28fce
ED		 302 return;
303 }
304
305 /* to check exception */
306 prev_nr = vcpu->arch.exception.nr;
307 if (prev_nr == DF_VECTOR) {
308 /* triple fault -> shutdown */
a8eeb04a 309 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
3fd28fce
ED		 310 return;
311 }
312 class1 = exception_class(prev_nr);
313 class2 = exception_class(nr);
314 if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY)
315 || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) {
316 /* generate double fault per SDM Table 5-5 */
317 vcpu->arch.exception.pending = true;
318 vcpu->arch.exception.has_error_code = true;
319 vcpu->arch.exception.nr = DF_VECTOR;
320 vcpu->arch.exception.error_code = 0;
321 } else
322 /* replace previous exception with a new one in a hope
323 that instruction re-execution will regenerate lost
324 exception */
325 goto queue;
326}
327
298101da
AK		 328void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
329{
ce7ddec4 330 kvm_multiple_exception(vcpu, nr, false, 0, false);
298101da
AK		 331}
332EXPORT_SYMBOL_GPL(kvm_queue_exception);
333
ce7ddec4
JR		 334void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr)
335{
336 kvm_multiple_exception(vcpu, nr, false, 0, true);
337}
338EXPORT_SYMBOL_GPL(kvm_requeue_exception);
339
db8fcefa 340void kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err)
c3c91fee 341{
db8fcefa
AP		 342 if (err)
343 kvm_inject_gp(vcpu, 0);
344 else
345 kvm_x86_ops->skip_emulated_instruction(vcpu);
346}
347EXPORT_SYMBOL_GPL(kvm_complete_insn_gp);
8df25a32 348
6389ee94 349void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
c3c91fee
AK		 350{
351 ++vcpu->stat.pf_guest;
6389ee94
AK		 352 vcpu->arch.cr2 = fault->address;
353 kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code);
c3c91fee 354}
27d6c865 355EXPORT_SYMBOL_GPL(kvm_inject_page_fault);
c3c91fee 356
6389ee94 357void kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
d4f8cf66 358{
6389ee94
AK		 359 if (mmu_is_nested(vcpu) && !fault->nested_page_fault)
360 vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault);
d4f8cf66 361 else
6389ee94 362 vcpu->arch.mmu.inject_page_fault(vcpu, fault);
d4f8cf66
JR		 363}
364
3419ffc8
SY		 365void kvm_inject_nmi(struct kvm_vcpu *vcpu)
366{
7460fb4a
AK		 367 atomic_inc(&vcpu->arch.nmi_queued);
368 kvm_make_request(KVM_REQ_NMI, vcpu);
3419ffc8
SY		 369}
370EXPORT_SYMBOL_GPL(kvm_inject_nmi);
371
298101da
AK		 372void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
373{
ce7ddec4 374 kvm_multiple_exception(vcpu, nr, true, error_code, false);
298101da
AK		 375}
376EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
377
ce7ddec4
JR		 378void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
379{
380 kvm_multiple_exception(vcpu, nr, true, error_code, true);
381}
382EXPORT_SYMBOL_GPL(kvm_requeue_exception_e);
383
0a79b009
AK		 384/*
385 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
386 * a #GP and return false.
387 */
388bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
298101da 389{
0a79b009
AK		 390 if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl)
391 return true;
392 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
393 return false;
298101da 394}
0a79b009 395EXPORT_SYMBOL_GPL(kvm_require_cpl);
298101da 396
ec92fe44
JR		 397/*
398 * This function will be used to read from the physical memory of the currently
399 * running guest. The difference to kvm_read_guest_page is that this function
400 * can read from guest physical or from the guest's guest physical memory.
401 */
402int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
403 gfn_t ngfn, void *data, int offset, int len,
404 u32 access)
405{
406 gfn_t real_gfn;
407 gpa_t ngpa;
408
409 ngpa = gfn_to_gpa(ngfn);
410 real_gfn = mmu->translate_gpa(vcpu, ngpa, access);
411 if (real_gfn == UNMAPPED_GVA)
412 return -EFAULT;
413
414 real_gfn = gpa_to_gfn(real_gfn);
415
416 return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len);
417}
418EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu);
419
3d06b8bf
JR		 420int kvm_read_nested_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn,
421 void *data, int offset, int len, u32 access)
422{
423 return kvm_read_guest_page_mmu(vcpu, vcpu->arch.walk_mmu, gfn,
424 data, offset, len, access);
425}
426
a03490ed
CO		 427/*
428 * Load the pae pdptrs. Return true is they are all valid.
429 */
ff03a073 430int load_pdptrs(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, unsigned long cr3)
a03490ed
CO		 431{
432 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
433 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
434 int i;
435 int ret;
ff03a073 436 u64 pdpte[ARRAY_SIZE(mmu->pdptrs)];
a03490ed 437
ff03a073
JR		 438 ret = kvm_read_guest_page_mmu(vcpu, mmu, pdpt_gfn, pdpte,
439 offset * sizeof(u64), sizeof(pdpte),
440 PFERR_USER_MASK|PFERR_WRITE_MASK);
a03490ed
CO		 441 if (ret < 0) {
442 ret = 0;
443 goto out;
444 }
445 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
43a3795a 446 if (is_present_gpte(pdpte[i]) &&
20c466b5 447 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
a03490ed
CO		 448 ret = 0;
449 goto out;
450 }
451 }
452 ret = 1;
453
ff03a073 454 memcpy(mmu->pdptrs, pdpte, sizeof(mmu->pdptrs));
6de4f3ad
AK		 455 __set_bit(VCPU_EXREG_PDPTR,
456 (unsigned long *)&vcpu->arch.regs_avail);
457 __set_bit(VCPU_EXREG_PDPTR,
458 (unsigned long *)&vcpu->arch.regs_dirty);
a03490ed 459out:
a03490ed
CO		 460
461 return ret;
462}
cc4b6871 463EXPORT_SYMBOL_GPL(load_pdptrs);
a03490ed 464
d835dfec
AK		 465static bool pdptrs_changed(struct kvm_vcpu *vcpu)
466{
ff03a073 467 u64 pdpte[ARRAY_SIZE(vcpu->arch.walk_mmu->pdptrs)];
d835dfec 468 bool changed = true;
3d06b8bf
JR		 469 int offset;
470 gfn_t gfn;
d835dfec
AK		 471 int r;
472
473 if (is_long_mode(vcpu) || !is_pae(vcpu))
474 return false;
475
6de4f3ad
AK		 476 if (!test_bit(VCPU_EXREG_PDPTR,
477 (unsigned long *)&vcpu->arch.regs_avail))
478 return true;
479
9f8fe504
AK		 480 gfn = (kvm_read_cr3(vcpu) & ~31u) >> PAGE_SHIFT;
481 offset = (kvm_read_cr3(vcpu) & ~31u) & (PAGE_SIZE - 1);
3d06b8bf
JR		 482 r = kvm_read_nested_guest_page(vcpu, gfn, pdpte, offset, sizeof(pdpte),
483 PFERR_USER_MASK | PFERR_WRITE_MASK);
d835dfec
AK		 484 if (r < 0)
485 goto out;
ff03a073 486 changed = memcmp(pdpte, vcpu->arch.walk_mmu->pdptrs, sizeof(pdpte)) != 0;
d835dfec 487out:
d835dfec
AK		 488
489 return changed;
490}
491
49a9b07e 492int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
a03490ed 493{
aad82703
SY		 494 unsigned long old_cr0 = kvm_read_cr0(vcpu);
495 unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
496 X86_CR0_CD | X86_CR0_NW;
497
f9a48e6a
AK		 498 cr0 |= X86_CR0_ET;
499
ab344828 500#ifdef CONFIG_X86_64
0f12244f
GN		 501 if (cr0 & 0xffffffff00000000UL)
502 return 1;
ab344828
GN		 503#endif
504
505 cr0 &= ~CR0_RESERVED_BITS;
a03490ed 506
0f12244f
GN		 507 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD))
508 return 1;
a03490ed 509
0f12244f
GN		 510 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE))
511 return 1;
a03490ed
CO		 512
513 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
514#ifdef CONFIG_X86_64
f6801dff 515 if ((vcpu->arch.efer & EFER_LME)) {
a03490ed
CO		 516 int cs_db, cs_l;
517
0f12244f
GN		 518 if (!is_pae(vcpu))
519 return 1;
a03490ed 520 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
0f12244f
GN		 521 if (cs_l)
522 return 1;
a03490ed
CO		 523 } else
524#endif
ff03a073 525 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
9f8fe504 526 kvm_read_cr3(vcpu)))
0f12244f 527 return 1;
a03490ed
CO		 528 }
529
530 kvm_x86_ops->set_cr0(vcpu, cr0);
a03490ed 531
d170c419 532 if ((cr0 ^ old_cr0) & X86_CR0_PG) {
e5f3f027 533 kvm_clear_async_pf_completion_queue(vcpu);
d170c419
LJ		 534 kvm_async_pf_hash_reset(vcpu);
535 }
e5f3f027 536
aad82703
SY		 537 if ((cr0 ^ old_cr0) & update_bits)
538 kvm_mmu_reset_context(vcpu);
0f12244f
GN		 539 return 0;
540}
2d3ad1f4 541EXPORT_SYMBOL_GPL(kvm_set_cr0);
a03490ed 542
2d3ad1f4 543void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
a03490ed 544{
49a9b07e 545 (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f));
a03490ed 546}
2d3ad1f4 547EXPORT_SYMBOL_GPL(kvm_lmsw);
a03490ed 548
2acf923e
DC		 549int __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
a83b29c6 580int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
a03490ed 581{
fc78f519 582 unsigned long old_cr4 = kvm_read_cr4(vcpu);
c68b734f
YW		 583 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE |
584 X86_CR4_PAE | X86_CR4_SMEP;
0f12244f
GN		 585 if (cr4 & CR4_RESERVED_BITS)
586 return 1;
a03490ed 587
2acf923e
DC		 588 if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE))
589 return 1;
590
c68b734f
YW		 591 if (!guest_cpuid_has_smep(vcpu) && (cr4 & X86_CR4_SMEP))
592 return 1;
593
74dc2b4f
YW		 594 if (!guest_cpuid_has_fsgsbase(vcpu) && (cr4 & X86_CR4_RDWRGSFS))
595 return 1;
596
a03490ed 597 if (is_long_mode(vcpu)) {
0f12244f
GN		 598 if (!(cr4 & X86_CR4_PAE))
599 return 1;
a2edf57f
AK		 600 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
601 && ((cr4 ^ old_cr4) & pdptr_bits)
9f8fe504
AK		 602 && !load_pdptrs(vcpu, vcpu->arch.walk_mmu,
603 kvm_read_cr3(vcpu)))
0f12244f
GN		 604 return 1;
605
5e1746d6 606 if (kvm_x86_ops->set_cr4(vcpu, cr4))
0f12244f 607 return 1;
a03490ed 608
aad82703
SY		 609 if ((cr4 ^ old_cr4) & pdptr_bits)
610 kvm_mmu_reset_context(vcpu);
0f12244f 611
2acf923e 612 if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE)
00b27a3e 613 kvm_update_cpuid(vcpu);
2acf923e 614
0f12244f
GN		 615 return 0;
616}
2d3ad1f4 617EXPORT_SYMBOL_GPL(kvm_set_cr4);
a03490ed 618
2390218b 619int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
a03490ed 620{
9f8fe504 621 if (cr3 == kvm_read_cr3(vcpu) && !pdptrs_changed(vcpu)) {
0ba73cda 622 kvm_mmu_sync_roots(vcpu);
d835dfec 623 kvm_mmu_flush_tlb(vcpu);
0f12244f 624 return 0;
d835dfec
AK		 625 }
626
a03490ed 627 if (is_long_mode(vcpu)) {
0f12244f
GN		 628 if (cr3 & CR3_L_MODE_RESERVED_BITS)
629 return 1;
a03490ed
CO		 630 } else {
631 if (is_pae(vcpu)) {
0f12244f
GN		 632 if (cr3 & CR3_PAE_RESERVED_BITS)
633 return 1;
ff03a073
JR		 634 if (is_paging(vcpu) &&
635 !load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3))
0f12244f 636 return 1;
a03490ed
CO		 637 }
638 /*
639 * We don't check reserved bits in nonpae mode, because
640 * this isn't enforced, and VMware depends on this.
641 */
642 }
643
a03490ed
CO		 644 /*
645 * Does the new cr3 value map to physical memory? (Note, we
646 * catch an invalid cr3 even in real-mode, because it would
647 * cause trouble later on when we turn on paging anyway.)
648 *
649 * A real CPU would silently accept an invalid cr3 and would
650 * attempt to use it - with largely undefined (and often hard
651 * to debug) behavior on the guest side.
652 */
653 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
0f12244f
GN		 654 return 1;
655 vcpu->arch.cr3 = cr3;
aff48baa 656 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
0f12244f
GN		 657 vcpu->arch.mmu.new_cr3(vcpu);
658 return 0;
659}
2d3ad1f4 660EXPORT_SYMBOL_GPL(kvm_set_cr3);
a03490ed 661
eea1cff9 662int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
a03490ed 663{
0f12244f
GN		 664 if (cr8 & CR8_RESERVED_BITS)
665 return 1;
a03490ed
CO		 666 if (irqchip_in_kernel(vcpu->kvm))
667 kvm_lapic_set_tpr(vcpu, cr8);
668 else
ad312c7c 669 vcpu->arch.cr8 = cr8;
0f12244f
GN		 670 return 0;
671}
2d3ad1f4 672EXPORT_SYMBOL_GPL(kvm_set_cr8);
a03490ed 673
2d3ad1f4 674unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
a03490ed
CO		 675{
676 if (irqchip_in_kernel(vcpu->kvm))
677 return kvm_lapic_get_cr8(vcpu);
678 else
ad312c7c 679 return vcpu->arch.cr8;
a03490ed 680}
2d3ad1f4 681EXPORT_SYMBOL_GPL(kvm_get_cr8);
a03490ed 682
338dbc97 683static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
020df079
GN		 684{
685 switch (dr) {
686 case 0 ... 3:
687 vcpu->arch.db[dr] = val;
688 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
689 vcpu->arch.eff_db[dr] = val;
690 break;
691 case 4:
338dbc97
GN		 692 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
693 return 1; /* #UD */
020df079
GN		 694 /* fall through */
695 case 6:
338dbc97
GN		 696 if (val & 0xffffffff00000000ULL)
697 return -1; /* #GP */
020df079
GN		 698 vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
699 break;
700 case 5:
338dbc97
GN		 701 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
702 return 1; /* #UD */
020df079
GN		 703 /* fall through */
704 default: /* 7 */
338dbc97
GN		 705 if (val & 0xffffffff00000000ULL)
706 return -1; /* #GP */
020df079
GN		 707 vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
708 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
709 kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7);
710 vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK);
711 }
712 break;
713 }
714
715 return 0;
716}
338dbc97
GN		 717
718int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
719{
720 int res;
721
722 res = __kvm_set_dr(vcpu, dr, val);
723 if (res > 0)
724 kvm_queue_exception(vcpu, UD_VECTOR);
725 else if (res < 0)
726 kvm_inject_gp(vcpu, 0);
727
728 return res;
729}
020df079
GN		 730EXPORT_SYMBOL_GPL(kvm_set_dr);
731
338dbc97 732static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
020df079
GN		 733{
734 switch (dr) {
735 case 0 ... 3:
736 *val = vcpu->arch.db[dr];
737 break;
738 case 4:
338dbc97 739 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
020df079 740 return 1;
020df079
GN		 741 /* fall through */
742 case 6:
743 *val = vcpu->arch.dr6;
744 break;
745 case 5:
338dbc97 746 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
020df079 747 return 1;
020df079
GN		 748 /* fall through */
749 default: /* 7 */
750 *val = vcpu->arch.dr7;
751 break;
752 }
753
754 return 0;
755}
338dbc97
GN		 756
757int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
758{
759 if (_kvm_get_dr(vcpu, dr, val)) {
760 kvm_queue_exception(vcpu, UD_VECTOR);
761 return 1;
762 }
763 return 0;
764}
020df079
GN		 765EXPORT_SYMBOL_GPL(kvm_get_dr);
766
022cd0e8
AK		 767bool kvm_rdpmc(struct kvm_vcpu *vcpu)
768{
769 u32 ecx = kvm_register_read(vcpu, VCPU_REGS_RCX);
770 u64 data;
771 int err;
772
773 err = kvm_pmu_read_pmc(vcpu, ecx, &data);
774 if (err)
775 return err;
776 kvm_register_write(vcpu, VCPU_REGS_RAX, (u32)data);
777 kvm_register_write(vcpu, VCPU_REGS_RDX, data >> 32);
778 return err;
779}
780EXPORT_SYMBOL_GPL(kvm_rdpmc);
781
043405e1
CO		 782/*
783 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
784 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
785 *
786 * This list is modified at module load time to reflect the
e3267cbb
GC		 787 * capabilities of the host cpu. This capabilities test skips MSRs that are
788 * kvm-specific. Those are put in the beginning of the list.
043405e1 789 */
e3267cbb 790
c9aaa895 791#define KVM_SAVE_MSRS_BEGIN 9
043405e1 792static u32 msrs_to_save[] = {
e3267cbb 793 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
11c6bffa 794 MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
55cd8e5a 795 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
c9aaa895 796 HV_X64_MSR_APIC_ASSIST_PAGE, MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
043405e1 797 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
8c06585d 798 MSR_STAR,
043405e1
CO		 799#ifdef CONFIG_X86_64
800 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
801#endif
e90aa41e 802 MSR_IA32_TSC, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
043405e1
CO		 803};
804
805static unsigned num_msrs_to_save;
806
807static u32 emulated_msrs[] = {
a3e06bbe 808 MSR_IA32_TSCDEADLINE,
043405e1 809 MSR_IA32_MISC_ENABLE,
908e75f3
AK		 810 MSR_IA32_MCG_STATUS,
811 MSR_IA32_MCG_CTL,
043405e1
CO		 812};
813
b69e8cae 814static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
15c4a640 815{
aad82703
SY		 816 u64 old_efer = vcpu->arch.efer;
817
b69e8cae
RJ		 818 if (efer & efer_reserved_bits)
819 return 1;
15c4a640
CO		 820
821 if (is_paging(vcpu)
b69e8cae
RJ		 822 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME))
823 return 1;
15c4a640 824
1b2fd70c
AG		 825 if (efer & EFER_FFXSR) {
826 struct kvm_cpuid_entry2 *feat;
827
828 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
b69e8cae
RJ		 829 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT)))
830 return 1;
1b2fd70c
AG		 831 }
832
d8017474
AG		 833 if (efer & EFER_SVME) {
834 struct kvm_cpuid_entry2 *feat;
835
836 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
b69e8cae
RJ		 837 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM)))
838 return 1;
d8017474
AG		 839 }
840
15c4a640 841 efer &= ~EFER_LMA;
f6801dff 842 efer |= vcpu->arch.efer & EFER_LMA;
15c4a640 843
a3d204e2
SY		 844 kvm_x86_ops->set_efer(vcpu, efer);
845
9645bb56 846 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
b69e8cae 847
aad82703
SY		 848 /* Update reserved bits */
849 if ((efer ^ old_efer) & EFER_NX)
850 kvm_mmu_reset_context(vcpu);
851
b69e8cae 852 return 0;
15c4a640
CO		 853}
854
f2b4b7dd
JR		 855void kvm_enable_efer_bits(u64 mask)
856{
857 efer_reserved_bits &= ~mask;
858}
859EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
860
861
15c4a640
CO		 862/*
863 * Writes msr value into into the appropriate "register".
864 * Returns 0 on success, non-0 otherwise.
865 * Assumes vcpu_load() was already called.
866 */
867int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
868{
869 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
870}
871
313a3dc7
CO		 872/*
873 * Adapt set_msr() to msr_io()'s calling convention
874 */
875static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
876{
877 return kvm_set_msr(vcpu, index, *data);
878}
879
18068523
GOC		 880static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
881{
9ed3c444
AK		 882 int version;
883 int r;
50d0a0f9 884 struct pvclock_wall_clock wc;
923de3cf 885 struct timespec boot;
18068523
GOC		 886
887 if (!wall_clock)
888 return;
889
9ed3c444
AK		 890 r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version));
891 if (r)
892 return;
893
894 if (version & 1)
895 ++version; /* first time write, random junk */
896
897 ++version;
18068523 898
18068523
GOC		 899 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
900
50d0a0f9
GH		 901 /*
902 * The guest calculates current wall clock time by adding
34c238a1 903 * system time (updated by kvm_guest_time_update below) to the
50d0a0f9
GH		 904 * wall clock specified here. guest system time equals host
905 * system time for us, thus we must fill in host boot time here.
906 */
923de3cf 907 getboottime(&boot);
50d0a0f9
GH		 908
909 wc.sec = boot.tv_sec;
910 wc.nsec = boot.tv_nsec;
911 wc.version = version;
18068523
GOC		 912
913 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
914
915 version++;
916 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
18068523
GOC		 917}
918
50d0a0f9
GH		 919static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
920{
921 uint32_t quotient, remainder;
922
923 /* Don't try to replace with do_div(), this one calculates
924 * "(dividend << 32) / divisor" */
925 __asm__ ( "divl %4"
926 : "=a" (quotient), "=d" (remainder)
927 : "0" (0), "1" (dividend), "r" (divisor) );
928 return quotient;
929}
930
5f4e3f88
ZA		 931static void kvm_get_time_scale(uint32_t scaled_khz, uint32_t base_khz,
932 s8 *pshift, u32 *pmultiplier)
50d0a0f9 933{
5f4e3f88 934 uint64_t scaled64;
50d0a0f9
GH		 935 int32_t shift = 0;
936 uint64_t tps64;
937 uint32_t tps32;
938
5f4e3f88
ZA		 939 tps64 = base_khz * 1000LL;
940 scaled64 = scaled_khz * 1000LL;
50933623 941 while (tps64 > scaled64*2 || tps64 & 0xffffffff00000000ULL) {
50d0a0f9
GH		 942 tps64 >>= 1;
943 shift--;
944 }
945
946 tps32 = (uint32_t)tps64;
50933623
JK		 947 while (tps32 <= scaled64 || scaled64 & 0xffffffff00000000ULL) {
948 if (scaled64 & 0xffffffff00000000ULL || tps32 & 0x80000000)
5f4e3f88
ZA		 949 scaled64 >>= 1;
950 else
951 tps32 <<= 1;
50d0a0f9
GH		 952 shift++;
953 }
954
5f4e3f88
ZA		 955 *pshift = shift;
956 *pmultiplier = div_frac(scaled64, tps32);
50d0a0f9 957
5f4e3f88
ZA		 958 pr_debug("%s: base_khz %u => %u, shift %d, mul %u\n",
959 __func__, base_khz, scaled_khz, shift, *pmultiplier);
50d0a0f9
GH		 960}
961
759379dd
ZA		 962static inline u64 get_kernel_ns(void)
963{
964 struct timespec ts;
965
966 WARN_ON(preemptible());
967 ktime_get_ts(&ts);
968 monotonic_to_bootbased(&ts);
969 return timespec_to_ns(&ts);
50d0a0f9
GH		 970}
971
c8076604 972static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
c285545f 973unsigned long max_tsc_khz;
c8076604 974
cc578287 975static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
8cfdc000 976{
cc578287
ZA		 977 return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
978 vcpu->arch.virtual_tsc_shift);
8cfdc000
ZA		 979}
980
cc578287 981static u32 adjust_tsc_khz(u32 khz, s32 ppm)
1e993611 982{
cc578287
ZA		 983 u64 v = (u64)khz * (1000000 + ppm);
984 do_div(v, 1000000);
985 return v;
1e993611
JR		 986}
987
cc578287 988static void kvm_set_tsc_khz(struct kvm_vcpu *vcpu, u32 this_tsc_khz)
759379dd 989{
cc578287
ZA		 990 u32 thresh_lo, thresh_hi;
991 int use_scaling = 0;
217fc9cf 992
c285545f
ZA		 993 /* Compute a scale to convert nanoseconds in TSC cycles */
994 kvm_get_time_scale(this_tsc_khz, NSEC_PER_SEC / 1000,
cc578287
ZA		 995 &vcpu->arch.virtual_tsc_shift,
996 &vcpu->arch.virtual_tsc_mult);
997 vcpu->arch.virtual_tsc_khz = this_tsc_khz;
998
999 /*
1000 * Compute the variation in TSC rate which is acceptable
1001 * within the range of tolerance and decide if the
1002 * rate being applied is within that bounds of the hardware
1003 * rate. If so, no scaling or compensation need be done.
1004 */
1005 thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm);
1006 thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm);
1007 if (this_tsc_khz < thresh_lo || this_tsc_khz > thresh_hi) {
1008 pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", this_tsc_khz, thresh_lo, thresh_hi);
1009 use_scaling = 1;
1010 }
1011 kvm_x86_ops->set_tsc_khz(vcpu, this_tsc_khz, use_scaling);
c285545f
ZA		 1012}
1013
1014static u64 compute_guest_tsc(struct kvm_vcpu *vcpu, s64 kernel_ns)
1015{
1016 u64 tsc = pvclock_scale_delta(kernel_ns-vcpu->arch.last_tsc_nsec,
cc578287
ZA		 1017 vcpu->arch.virtual_tsc_mult,
1018 vcpu->arch.virtual_tsc_shift);
c285545f
ZA		 1019 tsc += vcpu->arch.last_tsc_write;
1020 return tsc;
1021}
1022
99e3e30a
ZA		 1023void kvm_write_tsc(struct kvm_vcpu *vcpu, u64 data)
1024{
1025 struct kvm *kvm = vcpu->kvm;
f38e098f 1026 u64 offset, ns, elapsed;
99e3e30a 1027 unsigned long flags;
5d3cb0f6 1028 s64 nsdiff;
99e3e30a 1029
038f8c11 1030 raw_spin_lock_irqsave(&kvm->arch.tsc_write_lock, flags);
857e4099 1031 offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
759379dd 1032 ns = get_kernel_ns();
f38e098f 1033 elapsed = ns - kvm->arch.last_tsc_nsec;
5d3cb0f6
ZA		 1034
1035 /* n.b - signed multiplication and division required */
1036 nsdiff = data - kvm->arch.last_tsc_write;
1037#ifdef CONFIG_X86_64
1038 nsdiff = (nsdiff * 1000) / vcpu->arch.virtual_tsc_khz;
1039#else
1040 /* do_div() only does unsigned */
1041 asm("idivl %2; xor %%edx, %%edx"
1042 : "=A"(nsdiff)
1043 : "A"(nsdiff * 1000), "rm"(vcpu->arch.virtual_tsc_khz));
1044#endif
1045 nsdiff -= elapsed;
1046 if (nsdiff < 0)
1047 nsdiff = -nsdiff;
f38e098f
ZA		 1048
1049 /*
5d3cb0f6
ZA		 1050 * Special case: TSC write with a small delta (1 second) of virtual
1051 * cycle time against real time is interpreted as an attempt to
1052 * synchronize the CPU.
1053 *
1054 * For a reliable TSC, we can match TSC offsets, and for an unstable
1055 * TSC, we add elapsed time in this computation. We could let the
1056 * compensation code attempt to catch up if we fall behind, but
1057 * it's better to try to match offsets from the beginning.
1058 */
1059 if (nsdiff < NSEC_PER_SEC &&
1060 vcpu->arch.virtual_tsc_khz == kvm->arch.last_tsc_khz) {
f38e098f
ZA		 1061 if (!check_tsc_unstable()) {
1062 offset = kvm->arch.last_tsc_offset;
1063 pr_debug("kvm: matched tsc offset for %llu\n", data);
1064 } else {
857e4099 1065 u64 delta = nsec_to_cycles(vcpu, elapsed);
5d3cb0f6
ZA		 1066 data += delta;
1067 offset = kvm_x86_ops->compute_tsc_offset(vcpu, data);
759379dd 1068 pr_debug("kvm: adjusted tsc offset by %llu\n", delta);
f38e098f 1069 }
f38e098f
ZA		 1070 }
1071 kvm->arch.last_tsc_nsec = ns;
1072 kvm->arch.last_tsc_write = data;
1073 kvm->arch.last_tsc_offset = offset;
5d3cb0f6 1074 kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz;
99e3e30a 1075 kvm_x86_ops->write_tsc_offset(vcpu, offset);
038f8c11 1076 raw_spin_unlock_irqrestore(&kvm->arch.tsc_write_lock, flags);
99e3e30a
ZA		 1077
1078 /* Reset of TSC must disable overshoot protection below */
1079 vcpu->arch.hv_clock.tsc_timestamp = 0;
c285545f
ZA		 1080 vcpu->arch.last_tsc_write = data;
1081 vcpu->arch.last_tsc_nsec = ns;
b183aa58 1082 vcpu->arch.last_guest_tsc = data;
99e3e30a
ZA		 1083}
1084EXPORT_SYMBOL_GPL(kvm_write_tsc);
1085
34c238a1 1086static int kvm_guest_time_update(struct kvm_vcpu *v)
18068523 1087{
18068523
GOC		 1088 unsigned long flags;
1089 struct kvm_vcpu_arch *vcpu = &v->arch;
1090 void *shared_kaddr;
463656c0 1091 unsigned long this_tsc_khz;
1d5f066e
ZA		 1092 s64 kernel_ns, max_kernel_ns;
1093 u64 tsc_timestamp;
18068523 1094
18068523
GOC		 1095 /* Keep irq disabled to prevent changes to the clock */
1096 local_irq_save(flags);
d5c1785d 1097 tsc_timestamp = kvm_x86_ops->read_l1_tsc(v);
759379dd 1098 kernel_ns = get_kernel_ns();
cc578287 1099 this_tsc_khz = __get_cpu_var(cpu_tsc_khz);
8cfdc000 1100 if (unlikely(this_tsc_khz == 0)) {
c285545f 1101 local_irq_restore(flags);
34c238a1 1102 kvm_make_request(KVM_REQ_CLOCK_UPDATE, v);
8cfdc000
ZA		 1103 return 1;
1104 }
18068523 1105
c285545f
ZA		 1106 /*
1107 * We may have to catch up the TSC to match elapsed wall clock
1108 * time for two reasons, even if kvmclock is used.
1109 * 1) CPU could have been running below the maximum TSC rate
1110 * 2) Broken TSC compensation resets the base at each VCPU
1111 * entry to avoid unknown leaps of TSC even when running
1112 * again on the same CPU. This may cause apparent elapsed
1113 * time to disappear, and the guest to stand still or run
1114 * very slowly.
1115 */
1116 if (vcpu->tsc_catchup) {
1117 u64 tsc = compute_guest_tsc(v, kernel_ns);
1118 if (tsc > tsc_timestamp) {
f1e2b260 1119 adjust_tsc_offset_guest(v, tsc - tsc_timestamp);
c285545f
ZA		 1120 tsc_timestamp = tsc;
1121 }
50d0a0f9
GH		 1122 }
1123
18068523
GOC		 1124 local_irq_restore(flags);
1125
c285545f
ZA		 1126 if (!vcpu->time_page)
1127 return 0;
18068523 1128
1d5f066e
ZA		 1129 /*
1130 * Time as measured by the TSC may go backwards when resetting the base
1131 * tsc_timestamp. The reason for this is that the TSC resolution is
1132 * higher than the resolution of the other clock scales. Thus, many
1133 * possible measurments of the TSC correspond to one measurement of any
1134 * other clock, and so a spread of values is possible. This is not a
1135 * problem for the computation of the nanosecond clock; with TSC rates
1136 * around 1GHZ, there can only be a few cycles which correspond to one
1137 * nanosecond value, and any path through this code will inevitably
1138 * take longer than that. However, with the kernel_ns value itself,
1139 * the precision may be much lower, down to HZ granularity. If the
1140 * first sampling of TSC against kernel_ns ends in the low part of the
1141 * range, and the second in the high end of the range, we can get:
1142 *
1143 * (TSC - offset_low) * S + kns_old > (TSC - offset_high) * S + kns_new
1144 *
1145 * As the sampling errors potentially range in the thousands of cycles,
1146 * it is possible such a time value has already been observed by the
1147 * guest. To protect against this, we must compute the system time as
1148 * observed by the guest and ensure the new system time is greater.
1149 */
1150 max_kernel_ns = 0;
b183aa58 1151 if (vcpu->hv_clock.tsc_timestamp) {
1d5f066e
ZA		 1152 max_kernel_ns = vcpu->last_guest_tsc -
1153 vcpu->hv_clock.tsc_timestamp;
1154 max_kernel_ns = pvclock_scale_delta(max_kernel_ns,
1155 vcpu->hv_clock.tsc_to_system_mul,
1156 vcpu->hv_clock.tsc_shift);
1157 max_kernel_ns += vcpu->last_kernel_ns;
1158 }
afbcf7ab 1159
e48672fa 1160 if (unlikely(vcpu->hw_tsc_khz != this_tsc_khz)) {
5f4e3f88
ZA		 1161 kvm_get_time_scale(NSEC_PER_SEC / 1000, this_tsc_khz,
1162 &vcpu->hv_clock.tsc_shift,
1163 &vcpu->hv_clock.tsc_to_system_mul);
e48672fa 1164 vcpu->hw_tsc_khz = this_tsc_khz;
8cfdc000
ZA		 1165 }
1166
1d5f066e
ZA		 1167 if (max_kernel_ns > kernel_ns)
1168 kernel_ns = max_kernel_ns;
1169
8cfdc000 1170 /* With all the info we got, fill in the values */
1d5f066e 1171 vcpu->hv_clock.tsc_timestamp = tsc_timestamp;
759379dd 1172 vcpu->hv_clock.system_time = kernel_ns + v->kvm->arch.kvmclock_offset;
1d5f066e 1173 vcpu->last_kernel_ns = kernel_ns;
28e4639a 1174 vcpu->last_guest_tsc = tsc_timestamp;
371bcf64
GC		 1175 vcpu->hv_clock.flags = 0;
1176
18068523
GOC		 1177 /*
1178 * The interface expects us to write an even number signaling that the
1179 * update is finished. Since the guest won't see the intermediate
50d0a0f9 1180 * state, we just increase by 2 at the end.
18068523 1181 */
50d0a0f9 1182 vcpu->hv_clock.version += 2;
18068523
GOC		 1183
1184 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
1185
1186 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
50d0a0f9 1187 sizeof(vcpu->hv_clock));
18068523
GOC		 1188
1189 kunmap_atomic(shared_kaddr, KM_USER0);
1190
1191 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
8cfdc000 1192 return 0;
c8076604
GH		 1193}
1194
9ba075a6
AK		 1195static bool msr_mtrr_valid(unsigned msr)
1196{
1197 switch (msr) {
1198 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
1199 case MSR_MTRRfix64K_00000:
1200 case MSR_MTRRfix16K_80000:
1201 case MSR_MTRRfix16K_A0000:
1202 case MSR_MTRRfix4K_C0000:
1203 case MSR_MTRRfix4K_C8000:
1204 case MSR_MTRRfix4K_D0000:
1205 case MSR_MTRRfix4K_D8000:
1206 case MSR_MTRRfix4K_E0000:
1207 case MSR_MTRRfix4K_E8000:
1208 case MSR_MTRRfix4K_F0000:
1209 case MSR_MTRRfix4K_F8000:
1210 case MSR_MTRRdefType:
1211 case MSR_IA32_CR_PAT:
1212 return true;
1213 case 0x2f8:
1214 return true;
1215 }
1216 return false;
1217}
1218
d6289b93
MT		 1219static bool valid_pat_type(unsigned t)
1220{
1221 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
1222}
1223
1224static bool valid_mtrr_type(unsigned t)
1225{
1226 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
1227}
1228
1229static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1230{
1231 int i;
1232
1233 if (!msr_mtrr_valid(msr))
1234 return false;
1235
1236 if (msr == MSR_IA32_CR_PAT) {
1237 for (i = 0; i < 8; i++)
1238 if (!valid_pat_type((data >> (i * 8)) & 0xff))
1239 return false;
1240 return true;
1241 } else if (msr == MSR_MTRRdefType) {
1242 if (data & ~0xcff)
1243 return false;
1244 return valid_mtrr_type(data & 0xff);
1245 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
1246 for (i = 0; i < 8 ; i++)
1247 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
1248 return false;
1249 return true;
1250 }
1251
1252 /* variable MTRRs */
1253 return valid_mtrr_type(data & 0xff);
1254}
1255
9ba075a6
AK		 1256static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1257{
0bed3b56
SY		 1258 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1259
d6289b93 1260 if (!mtrr_valid(vcpu, msr, data))
9ba075a6
AK		 1261 return 1;
1262
0bed3b56
SY		 1263 if (msr == MSR_MTRRdefType) {
1264 vcpu->arch.mtrr_state.def_type = data;
1265 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
1266 } else if (msr == MSR_MTRRfix64K_00000)
1267 p[0] = data;
1268 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1269 p[1 + msr - MSR_MTRRfix16K_80000] = data;
1270 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1271 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
1272 else if (msr == MSR_IA32_CR_PAT)
1273 vcpu->arch.pat = data;
1274 else { /* Variable MTRRs */
1275 int idx, is_mtrr_mask;
1276 u64 *pt;
1277
1278 idx = (msr - 0x200) / 2;
1279 is_mtrr_mask = msr - 0x200 - 2 * idx;
1280 if (!is_mtrr_mask)
1281 pt =
1282 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1283 else
1284 pt =
1285 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1286 *pt = data;
1287 }
1288
1289 kvm_mmu_reset_context(vcpu);
9ba075a6
AK		 1290 return 0;
1291}
15c4a640 1292
890ca9ae 1293static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
15c4a640 1294{
890ca9ae
HY		 1295 u64 mcg_cap = vcpu->arch.mcg_cap;
1296 unsigned bank_num = mcg_cap & 0xff;
1297
15c4a640 1298 switch (msr) {
15c4a640 1299 case MSR_IA32_MCG_STATUS:
890ca9ae 1300 vcpu->arch.mcg_status = data;
15c4a640 1301 break;
c7ac679c 1302 case MSR_IA32_MCG_CTL:
890ca9ae
HY		 1303 if (!(mcg_cap & MCG_CTL_P))
1304 return 1;
1305 if (data != 0 && data != ~(u64)0)
1306 return -1;
1307 vcpu->arch.mcg_ctl = data;
1308 break;
1309 default:
1310 if (msr >= MSR_IA32_MC0_CTL &&
1311 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1312 u32 offset = msr - MSR_IA32_MC0_CTL;
114be429
AP		 1313 /* only 0 or all 1s can be written to IA32_MCi_CTL
1314 * some Linux kernels though clear bit 10 in bank 4 to
1315 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
1316 * this to avoid an uncatched #GP in the guest
1317 */
890ca9ae 1318 if ((offset & 0x3) == 0 &&
114be429 1319 data != 0 && (data | (1 << 10)) != ~(u64)0)
890ca9ae
HY		 1320 return -1;
1321 vcpu->arch.mce_banks[offset] = data;
1322 break;
1323 }
1324 return 1;
1325 }
1326 return 0;
1327}
1328
ffde22ac
ES		 1329static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
1330{
1331 struct kvm *kvm = vcpu->kvm;
1332 int lm = is_long_mode(vcpu);
1333 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
1334 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
1335 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
1336 : kvm->arch.xen_hvm_config.blob_size_32;
1337 u32 page_num = data & ~PAGE_MASK;
1338 u64 page_addr = data & PAGE_MASK;
1339 u8 *page;
1340 int r;
1341
1342 r = -E2BIG;
1343 if (page_num >= blob_size)
1344 goto out;
1345 r = -ENOMEM;
ff5c2c03
SL		 1346 page = memdup_user(blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE);
1347 if (IS_ERR(page)) {
1348 r = PTR_ERR(page);
ffde22ac 1349 goto out;
ff5c2c03 1350 }
ffde22ac
ES		 1351 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
1352 goto out_free;
1353 r = 0;
1354out_free:
1355 kfree(page);
1356out:
1357 return r;
1358}
1359
55cd8e5a
GN		 1360static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
1361{
1362 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
1363}
1364
1365static bool kvm_hv_msr_partition_wide(u32 msr)
1366{
1367 bool r = false;
1368 switch (msr) {
1369 case HV_X64_MSR_GUEST_OS_ID:
1370 case HV_X64_MSR_HYPERCALL:
1371 r = true;
1372 break;
1373 }
1374
1375 return r;
1376}
1377
1378static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1379{
1380 struct kvm *kvm = vcpu->kvm;
1381
1382 switch (msr) {
1383 case HV_X64_MSR_GUEST_OS_ID:
1384 kvm->arch.hv_guest_os_id = data;
1385 /* setting guest os id to zero disables hypercall page */
1386 if (!kvm->arch.hv_guest_os_id)
1387 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
1388 break;
1389 case HV_X64_MSR_HYPERCALL: {
1390 u64 gfn;
1391 unsigned long addr;
1392 u8 instructions[4];
1393
1394 /* if guest os id is not set hypercall should remain disabled */
1395 if (!kvm->arch.hv_guest_os_id)
1396 break;
1397 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1398 kvm->arch.hv_hypercall = data;
1399 break;
1400 }
1401 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1402 addr = gfn_to_hva(kvm, gfn);
1403 if (kvm_is_error_hva(addr))
1404 return 1;
1405 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1406 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
8b0cedff 1407 if (__copy_to_user((void __user *)addr, instructions, 4))
55cd8e5a
GN		 1408 return 1;
1409 kvm->arch.hv_hypercall = data;
1410 break;
1411 }
1412 default:
1413 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1414 "data 0x%llx\n", msr, data);
1415 return 1;
1416 }
1417 return 0;
1418}
1419
1420static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1421{
10388a07
GN		 1422 switch (msr) {
1423 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1424 unsigned long addr;
55cd8e5a 1425
10388a07
GN		 1426 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1427 vcpu->arch.hv_vapic = data;
1428 break;
1429 }
1430 addr = gfn_to_hva(vcpu->kvm, data >>
1431 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1432 if (kvm_is_error_hva(addr))
1433 return 1;
8b0cedff 1434 if (__clear_user((void __user *)addr, PAGE_SIZE))
10388a07
GN		 1435 return 1;
1436 vcpu->arch.hv_vapic = data;
1437 break;
1438 }
1439 case HV_X64_MSR_EOI:
1440 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1441 case HV_X64_MSR_ICR:
1442 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1443 case HV_X64_MSR_TPR:
1444 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1445 default:
1446 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1447 "data 0x%llx\n", msr, data);
1448 return 1;
1449 }
1450
1451 return 0;
55cd8e5a
GN		 1452}
1453
344d9588
GN		 1454static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
1455{
1456 gpa_t gpa = data & ~0x3f;
1457
6adba527
GN		 1458 /* Bits 2:5 are resrved, Should be zero */
1459 if (data & 0x3c)
344d9588
GN		 1460 return 1;
1461
1462 vcpu->arch.apf.msr_val = data;
1463
1464 if (!(data & KVM_ASYNC_PF_ENABLED)) {
1465 kvm_clear_async_pf_completion_queue(vcpu);
1466 kvm_async_pf_hash_reset(vcpu);
1467 return 0;
1468 }
1469
1470 if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.apf.data, gpa))
1471 return 1;
1472
6adba527 1473 vcpu->arch.apf.send_user_only = !(data & KVM_ASYNC_PF_SEND_ALWAYS);
344d9588
GN		 1474 kvm_async_pf_wakeup_all(vcpu);
1475 return 0;
1476}
1477
12f9a48f
GC		 1478static void kvmclock_reset(struct kvm_vcpu *vcpu)
1479{
1480 if (vcpu->arch.time_page) {
1481 kvm_release_page_dirty(vcpu->arch.time_page);
1482 vcpu->arch.time_page = NULL;
1483 }
1484}
1485
c9aaa895
GC		 1486static void accumulate_steal_time(struct kvm_vcpu *vcpu)
1487{
1488 u64 delta;
1489
1490 if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
1491 return;
1492
1493 delta = current->sched_info.run_delay - vcpu->arch.st.last_steal;
1494 vcpu->arch.st.last_steal = current->sched_info.run_delay;
1495 vcpu->arch.st.accum_steal = delta;
1496}
1497
1498static void record_steal_time(struct kvm_vcpu *vcpu)
1499{
1500 if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
1501 return;
1502
1503 if (unlikely(kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
1504 &vcpu->arch.st.steal, sizeof(struct kvm_steal_time))))
1505 return;
1506
1507 vcpu->arch.st.steal.steal += vcpu->arch.st.accum_steal;
1508 vcpu->arch.st.steal.version += 2;
1509 vcpu->arch.st.accum_steal = 0;
1510
1511 kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.st.stime,
1512 &vcpu->arch.st.steal, sizeof(struct kvm_steal_time));
1513}
1514
15c4a640
CO		 1515int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1516{
5753785f
GN		 1517 bool pr = false;
1518
15c4a640 1519 switch (msr) {
15c4a640 1520 case MSR_EFER:
b69e8cae 1521 return set_efer(vcpu, data);
8f1589d9
AP		 1522 case MSR_K7_HWCR:
1523 data &= ~(u64)0x40; /* ignore flush filter disable */
82494028 1524 data &= ~(u64)0x100; /* ignore ignne emulation enable */
8f1589d9
AP		 1525 if (data != 0) {
1526 pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1527 data);
1528 return 1;
1529 }
15c4a640 1530 break;
f7c6d140
AP		 1531 case MSR_FAM10H_MMIO_CONF_BASE:
1532 if (data != 0) {
1533 pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1534 "0x%llx\n", data);
1535 return 1;
1536 }
15c4a640 1537 break;
c323c0e5 1538 case MSR_AMD64_NB_CFG:
c7ac679c 1539 break;
b5e2fec0
AG		 1540 case MSR_IA32_DEBUGCTLMSR:
1541 if (!data) {
1542 /* We support the non-activated case already */
1543 break;
1544 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1545 /* Values other than LBR and BTF are vendor-specific,
1546 thus reserved and should throw a #GP */
1547 return 1;
1548 }
1549 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1550 __func__, data);
1551 break;
15c4a640
CO		 1552 case MSR_IA32_UCODE_REV:
1553 case MSR_IA32_UCODE_WRITE:
61a6bd67 1554 case MSR_VM_HSAVE_PA:
6098ca93 1555 case MSR_AMD64_PATCH_LOADER:
15c4a640 1556 break;
9ba075a6
AK		 1557 case 0x200 ... 0x2ff:
1558 return set_msr_mtrr(vcpu, msr, data);
15c4a640
CO		 1559 case MSR_IA32_APICBASE:
1560 kvm_set_apic_base(vcpu, data);
1561 break;
0105d1a5
GN		 1562 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1563 return kvm_x2apic_msr_write(vcpu, msr, data);
a3e06bbe
LJ		 1564 case MSR_IA32_TSCDEADLINE:
1565 kvm_set_lapic_tscdeadline_msr(vcpu, data);
1566 break;
15c4a640 1567 case MSR_IA32_MISC_ENABLE:
ad312c7c 1568 vcpu->arch.ia32_misc_enable_msr = data;
15c4a640 1569 break;
11c6bffa 1570 case MSR_KVM_WALL_CLOCK_NEW:
18068523
GOC		 1571 case MSR_KVM_WALL_CLOCK:
1572 vcpu->kvm->arch.wall_clock = data;
1573 kvm_write_wall_clock(vcpu->kvm, data);
1574 break;
11c6bffa 1575 case MSR_KVM_SYSTEM_TIME_NEW:
18068523 1576 case MSR_KVM_SYSTEM_TIME: {
12f9a48f 1577 kvmclock_reset(vcpu);
18068523
GOC		 1578
1579 vcpu->arch.time = data;
c285545f 1580 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
18068523
GOC		 1581
1582 /* we verify if the enable bit is set... */
1583 if (!(data & 1))
1584 break;
1585
1586 /* ...but clean it before doing the actual write */
1587 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1588
18068523
GOC		 1589 vcpu->arch.time_page =
1590 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
18068523
GOC		 1591
1592 if (is_error_page(vcpu->arch.time_page)) {
1593 kvm_release_page_clean(vcpu->arch.time_page);
1594 vcpu->arch.time_page = NULL;
1595 }
18068523
GOC		 1596 break;
1597 }
344d9588
GN		 1598 case MSR_KVM_ASYNC_PF_EN:
1599 if (kvm_pv_enable_async_pf(vcpu, data))
1600 return 1;
1601 break;
c9aaa895
GC		 1602 case MSR_KVM_STEAL_TIME:
1603
1604 if (unlikely(!sched_info_on()))
1605 return 1;
1606
1607 if (data & KVM_STEAL_RESERVED_MASK)
1608 return 1;
1609
1610 if (kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.st.stime,
1611 data & KVM_STEAL_VALID_BITS))
1612 return 1;
1613
1614 vcpu->arch.st.msr_val = data;
1615
1616 if (!(data & KVM_MSR_ENABLED))
1617 break;
1618
1619 vcpu->arch.st.last_steal = current->sched_info.run_delay;
1620
1621 preempt_disable();
1622 accumulate_steal_time(vcpu);
1623 preempt_enable();
1624
1625 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
1626
1627 break;
1628
890ca9ae
HY		 1629 case MSR_IA32_MCG_CTL:
1630 case MSR_IA32_MCG_STATUS:
1631 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1632 return set_msr_mce(vcpu, msr, data);
71db6023
AP		 1633
1634 /* Performance counters are not protected by a CPUID bit,
1635 * so we should check all of them in the generic path for the sake of
1636 * cross vendor migration.
1637 * Writing a zero into the event select MSRs disables them,
1638 * which we perfectly emulate ;-). Any other value should be at least
1639 * reported, some guests depend on them.
1640 */
71db6023
AP		 1641 case MSR_K7_EVNTSEL0:
1642 case MSR_K7_EVNTSEL1:
1643 case MSR_K7_EVNTSEL2:
1644 case MSR_K7_EVNTSEL3:
1645 if (data != 0)
1646 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1647 "0x%x data 0x%llx\n", msr, data);
1648 break;
1649 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1650 * so we ignore writes to make it happy.
1651 */
71db6023
AP		 1652 case MSR_K7_PERFCTR0:
1653 case MSR_K7_PERFCTR1:
1654 case MSR_K7_PERFCTR2:
1655 case MSR_K7_PERFCTR3:
1656 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1657 "0x%x data 0x%llx\n", msr, data);
1658 break;
5753785f
GN		 1659 case MSR_P6_PERFCTR0:
1660 case MSR_P6_PERFCTR1:
1661 pr = true;
1662 case MSR_P6_EVNTSEL0:
1663 case MSR_P6_EVNTSEL1:
1664 if (kvm_pmu_msr(vcpu, msr))
1665 return kvm_pmu_set_msr(vcpu, msr, data);
1666
1667 if (pr || data != 0)
1668 pr_unimpl(vcpu, "disabled perfctr wrmsr: "
1669 "0x%x data 0x%llx\n", msr, data);
1670 break;
84e0cefa
JS		 1671 case MSR_K7_CLK_CTL:
1672 /*
1673 * Ignore all writes to this no longer documented MSR.
1674 * Writes are only relevant for old K7 processors,
1675 * all pre-dating SVM, but a recommended workaround from
1676 * AMD for these chips. It is possible to speicify the
1677 * affected processor models on the command line, hence
1678 * the need to ignore the workaround.
1679 */
1680 break;
55cd8e5a
GN		 1681 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1682 if (kvm_hv_msr_partition_wide(msr)) {
1683 int r;
1684 mutex_lock(&vcpu->kvm->lock);
1685 r = set_msr_hyperv_pw(vcpu, msr, data);
1686 mutex_unlock(&vcpu->kvm->lock);
1687 return r;
1688 } else
1689 return set_msr_hyperv(vcpu, msr, data);
1690 break;
91c9c3ed 1691 case MSR_IA32_BBL_CR_CTL3:
1692 /* Drop writes to this legacy MSR -- see rdmsr
1693 * counterpart for further detail.
1694 */
1695 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", msr, data);
1696 break;
2b036c6b
BO		 1697 case MSR_AMD64_OSVW_ID_LENGTH:
1698 if (!guest_cpuid_has_osvw(vcpu))
1699 return 1;
1700 vcpu->arch.osvw.length = data;
1701 break;
1702 case MSR_AMD64_OSVW_STATUS:
1703 if (!guest_cpuid_has_osvw(vcpu))
1704 return 1;
1705 vcpu->arch.osvw.status = data;
1706 break;
15c4a640 1707 default:
ffde22ac
ES		 1708 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1709 return xen_hvm_config(vcpu, data);
f5132b01
GN		 1710 if (kvm_pmu_msr(vcpu, msr))
1711 return kvm_pmu_set_msr(vcpu, msr, data);
ed85c068
AP		 1712 if (!ignore_msrs) {
1713 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1714 msr, data);
1715 return 1;
1716 } else {
1717 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1718 msr, data);
1719 break;
1720 }
15c4a640
CO		 1721 }
1722 return 0;
1723}
1724EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1725
1726
1727/*
1728 * Reads an msr value (of 'msr_index') into 'pdata'.
1729 * Returns 0 on success, non-0 otherwise.
1730 * Assumes vcpu_load() was already called.
1731 */
1732int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1733{
1734 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1735}
1736
9ba075a6
AK		 1737static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1738{
0bed3b56
SY		 1739 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1740
9ba075a6
AK		 1741 if (!msr_mtrr_valid(msr))
1742 return 1;
1743
0bed3b56
SY		 1744 if (msr == MSR_MTRRdefType)
1745 *pdata = vcpu->arch.mtrr_state.def_type +
1746 (vcpu->arch.mtrr_state.enabled << 10);
1747 else if (msr == MSR_MTRRfix64K_00000)
1748 *pdata = p[0];
1749 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1750 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1751 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1752 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1753 else if (msr == MSR_IA32_CR_PAT)
1754 *pdata = vcpu->arch.pat;
1755 else { /* Variable MTRRs */
1756 int idx, is_mtrr_mask;
1757 u64 *pt;
1758
1759 idx = (msr - 0x200) / 2;
1760 is_mtrr_mask = msr - 0x200 - 2 * idx;
1761 if (!is_mtrr_mask)
1762 pt =
1763 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1764 else
1765 pt =
1766 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1767 *pdata = *pt;
1768 }
1769
9ba075a6
AK		 1770 return 0;
1771}
1772
890ca9ae 1773static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
15c4a640
CO		 1774{
1775 u64 data;
890ca9ae
HY		 1776 u64 mcg_cap = vcpu->arch.mcg_cap;
1777 unsigned bank_num = mcg_cap & 0xff;
15c4a640
CO		 1778
1779 switch (msr) {
15c4a640
CO		 1780 case MSR_IA32_P5_MC_ADDR:
1781 case MSR_IA32_P5_MC_TYPE:
890ca9ae
HY		 1782 data = 0;
1783 break;
15c4a640 1784 case MSR_IA32_MCG_CAP:
890ca9ae
HY		 1785 data = vcpu->arch.mcg_cap;
1786 break;
c7ac679c 1787 case MSR_IA32_MCG_CTL:
890ca9ae
HY		 1788 if (!(mcg_cap & MCG_CTL_P))
1789 return 1;
1790 data = vcpu->arch.mcg_ctl;
1791 break;
1792 case MSR_IA32_MCG_STATUS:
1793 data = vcpu->arch.mcg_status;
1794 break;
1795 default:
1796 if (msr >= MSR_IA32_MC0_CTL &&
1797 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1798 u32 offset = msr - MSR_IA32_MC0_CTL;
1799 data = vcpu->arch.mce_banks[offset];
1800 break;
1801 }
1802 return 1;
1803 }
1804 *pdata = data;
1805 return 0;
1806}
1807
55cd8e5a
GN		 1808static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1809{
1810 u64 data = 0;
1811 struct kvm *kvm = vcpu->kvm;
1812
1813 switch (msr) {
1814 case HV_X64_MSR_GUEST_OS_ID:
1815 data = kvm->arch.hv_guest_os_id;
1816 break;
1817 case HV_X64_MSR_HYPERCALL:
1818 data = kvm->arch.hv_hypercall;
1819 break;
1820 default:
1821 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1822 return 1;
1823 }
1824
1825 *pdata = data;
1826 return 0;
1827}
1828
1829static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1830{
1831 u64 data = 0;
1832
1833 switch (msr) {
1834 case HV_X64_MSR_VP_INDEX: {
1835 int r;
1836 struct kvm_vcpu *v;
1837 kvm_for_each_vcpu(r, v, vcpu->kvm)
1838 if (v == vcpu)
1839 data = r;
1840 break;
1841 }
10388a07
GN		 1842 case HV_X64_MSR_EOI:
1843 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1844 case HV_X64_MSR_ICR:
1845 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1846 case HV_X64_MSR_TPR:
1847 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
14fa67ee 1848 case HV_X64_MSR_APIC_ASSIST_PAGE:
d1613ad5
MW		 1849 data = vcpu->arch.hv_vapic;
1850 break;
55cd8e5a
GN		 1851 default:
1852 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1853 return 1;
1854 }
1855 *pdata = data;
1856 return 0;
1857}
1858
890ca9ae
HY		 1859int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1860{
1861 u64 data;
1862
1863 switch (msr) {
890ca9ae 1864 case MSR_IA32_PLATFORM_ID:
15c4a640 1865 case MSR_IA32_EBL_CR_POWERON:
b5e2fec0
AG		 1866 case MSR_IA32_DEBUGCTLMSR:
1867 case MSR_IA32_LASTBRANCHFROMIP:
1868 case MSR_IA32_LASTBRANCHTOIP:
1869 case MSR_IA32_LASTINTFROMIP:
1870 case MSR_IA32_LASTINTTOIP:
60af2ecd
JSR		 1871 case MSR_K8_SYSCFG:
1872 case MSR_K7_HWCR:
61a6bd67 1873 case MSR_VM_HSAVE_PA:
9e699624 1874 case MSR_K7_EVNTSEL0:
1f3ee616 1875 case MSR_K7_PERFCTR0:
1fdbd48c 1876 case MSR_K8_INT_PENDING_MSG:
c323c0e5 1877 case MSR_AMD64_NB_CFG:
f7c6d140 1878 case MSR_FAM10H_MMIO_CONF_BASE:
15c4a640
CO		 1879 data = 0;
1880 break;
5753785f
GN		 1881 case MSR_P6_PERFCTR0:
1882 case MSR_P6_PERFCTR1:
1883 case MSR_P6_EVNTSEL0:
1884 case MSR_P6_EVNTSEL1:
1885 if (kvm_pmu_msr(vcpu, msr))
1886 return kvm_pmu_get_msr(vcpu, msr, pdata);
1887 data = 0;
1888 break;
742bc670
MT		 1889 case MSR_IA32_UCODE_REV:
1890 data = 0x100000000ULL;
1891 break;
9ba075a6
AK		 1892 case MSR_MTRRcap:
1893 data = 0x500 | KVM_NR_VAR_MTRR;
1894 break;
1895 case 0x200 ... 0x2ff:
1896 return get_msr_mtrr(vcpu, msr, pdata);
15c4a640
CO		 1897 case 0xcd: /* fsb frequency */
1898 data = 3;
1899 break;
7b914098
JS		 1900 /*
1901 * MSR_EBC_FREQUENCY_ID
1902 * Conservative value valid for even the basic CPU models.
1903 * Models 0,1: 000 in bits 23:21 indicating a bus speed of
1904 * 100MHz, model 2 000 in bits 18:16 indicating 100MHz,
1905 * and 266MHz for model 3, or 4. Set Core Clock
1906 * Frequency to System Bus Frequency Ratio to 1 (bits
1907 * 31:24) even though these are only valid for CPU
1908 * models > 2, however guests may end up dividing or
1909 * multiplying by zero otherwise.
1910 */
1911 case MSR_EBC_FREQUENCY_ID:
1912 data = 1 << 24;
1913 break;
15c4a640
CO		 1914 case MSR_IA32_APICBASE:
1915 data = kvm_get_apic_base(vcpu);
1916 break;
0105d1a5
GN		 1917 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1918 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1919 break;
a3e06bbe
LJ		 1920 case MSR_IA32_TSCDEADLINE:
1921 data = kvm_get_lapic_tscdeadline_msr(vcpu);
1922 break;
15c4a640 1923 case MSR_IA32_MISC_ENABLE:
ad312c7c 1924 data = vcpu->arch.ia32_misc_enable_msr;
15c4a640 1925 break;
847f0ad8
AG		 1926 case MSR_IA32_PERF_STATUS:
1927 /* TSC increment by tick */
1928 data = 1000ULL;
1929 /* CPU multiplier */
1930 data |= (((uint64_t)4ULL) << 40);
1931 break;
15c4a640 1932 case MSR_EFER:
f6801dff 1933 data = vcpu->arch.efer;
15c4a640 1934 break;
18068523 1935 case MSR_KVM_WALL_CLOCK:
11c6bffa 1936 case MSR_KVM_WALL_CLOCK_NEW:
18068523
GOC		 1937 data = vcpu->kvm->arch.wall_clock;
1938 break;
1939 case MSR_KVM_SYSTEM_TIME:
11c6bffa 1940 case MSR_KVM_SYSTEM_TIME_NEW:
18068523
GOC		 1941 data = vcpu->arch.time;
1942 break;
344d9588
GN		 1943 case MSR_KVM_ASYNC_PF_EN:
1944 data = vcpu->arch.apf.msr_val;
1945 break;
c9aaa895
GC		 1946 case MSR_KVM_STEAL_TIME:
1947 data = vcpu->arch.st.msr_val;
1948 break;
890ca9ae
HY		 1949 case MSR_IA32_P5_MC_ADDR:
1950 case MSR_IA32_P5_MC_TYPE:
1951 case MSR_IA32_MCG_CAP:
1952 case MSR_IA32_MCG_CTL:
1953 case MSR_IA32_MCG_STATUS:
1954 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1955 return get_msr_mce(vcpu, msr, pdata);
84e0cefa
JS		 1956 case MSR_K7_CLK_CTL:
1957 /*
1958 * Provide expected ramp-up count for K7. All other
1959 * are set to zero, indicating minimum divisors for
1960 * every field.
1961 *
1962 * This prevents guest kernels on AMD host with CPU
1963 * type 6, model 8 and higher from exploding due to
1964 * the rdmsr failing.
1965 */
1966 data = 0x20000000;
1967 break;
55cd8e5a
GN		 1968 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1969 if (kvm_hv_msr_partition_wide(msr)) {
1970 int r;
1971 mutex_lock(&vcpu->kvm->lock);
1972 r = get_msr_hyperv_pw(vcpu, msr, pdata);
1973 mutex_unlock(&vcpu->kvm->lock);
1974 return r;
1975 } else
1976 return get_msr_hyperv(vcpu, msr, pdata);
1977 break;
91c9c3ed 1978 case MSR_IA32_BBL_CR_CTL3:
1979 /* This legacy MSR exists but isn't fully documented in current
1980 * silicon. It is however accessed by winxp in very narrow
1981 * scenarios where it sets bit #19, itself documented as
1982 * a "reserved" bit. Best effort attempt to source coherent
1983 * read data here should the balance of the register be
1984 * interpreted by the guest:
1985 *
1986 * L2 cache control register 3: 64GB range, 256KB size,
1987 * enabled, latency 0x1, configured
1988 */
1989 data = 0xbe702111;
1990 break;
2b036c6b
BO		 1991 case MSR_AMD64_OSVW_ID_LENGTH:
1992 if (!guest_cpuid_has_osvw(vcpu))
1993 return 1;
1994 data = vcpu->arch.osvw.length;
1995 break;
1996 case MSR_AMD64_OSVW_STATUS:
1997 if (!guest_cpuid_has_osvw(vcpu))
1998 return 1;
1999 data = vcpu->arch.osvw.status;
2000 break;
15c4a640 2001 default:
f5132b01
GN		 2002 if (kvm_pmu_msr(vcpu, msr))
2003 return kvm_pmu_get_msr(vcpu, msr, pdata);
ed85c068
AP		 2004 if (!ignore_msrs) {
2005 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
2006 return 1;
2007 } else {
2008 pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
2009 data = 0;
2010 }
2011 break;
15c4a640
CO		 2012 }
2013 *pdata = data;
2014 return 0;
2015}
2016EXPORT_SYMBOL_GPL(kvm_get_msr_common);
2017
313a3dc7
CO		 2018/*
2019 * Read or write a bunch of msrs. All parameters are kernel addresses.
2020 *
2021 * @return number of msrs set successfully.
2022 */
2023static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
2024 struct kvm_msr_entry *entries,
2025 int (*do_msr)(struct kvm_vcpu *vcpu,
2026 unsigned index, u64 *data))
2027{
f656ce01 2028 int i, idx;
313a3dc7 2029
f656ce01 2030 idx = srcu_read_lock(&vcpu->kvm->srcu);
313a3dc7
CO		 2031 for (i = 0; i < msrs->nmsrs; ++i)
2032 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2033 break;
f656ce01 2034 srcu_read_unlock(&vcpu->kvm->srcu, idx);
313a3dc7 2035
313a3dc7
CO		 2036 return i;
2037}
2038
2039/*
2040 * Read or write a bunch of msrs. Parameters are user addresses.
2041 *
2042 * @return number of msrs set successfully.
2043 */
2044static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
2045 int (*do_msr)(struct kvm_vcpu *vcpu,
2046 unsigned index, u64 *data),
2047 int writeback)
2048{
2049 struct kvm_msrs msrs;
2050 struct kvm_msr_entry *entries;
2051 int r, n;
2052 unsigned size;
2053
2054 r = -EFAULT;
2055 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2056 goto out;
2057
2058 r = -E2BIG;
2059 if (msrs.nmsrs >= MAX_IO_MSRS)
2060 goto out;
2061
313a3dc7 2062 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
ff5c2c03
SL		 2063 entries = memdup_user(user_msrs->entries, size);
2064 if (IS_ERR(entries)) {
2065 r = PTR_ERR(entries);
313a3dc7 2066 goto out;
ff5c2c03 2067 }
313a3dc7
CO		 2068
2069 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
2070 if (r < 0)
2071 goto out_free;
2072
2073 r = -EFAULT;
2074 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2075 goto out_free;
2076
2077 r = n;
2078
2079out_free:
7a73c028 2080 kfree(entries);
313a3dc7
CO		 2081out:
2082 return r;
2083}
2084
018d00d2
ZX		 2085int kvm_dev_ioctl_check_extension(long ext)
2086{
2087 int r;
2088
2089 switch (ext) {
2090 case KVM_CAP_IRQCHIP:
2091 case KVM_CAP_HLT:
2092 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
018d00d2 2093 case KVM_CAP_SET_TSS_ADDR:
07716717 2094 case KVM_CAP_EXT_CPUID:
c8076604 2095 case KVM_CAP_CLOCKSOURCE:
7837699f 2096 case KVM_CAP_PIT:
a28e4f5a 2097 case KVM_CAP_NOP_IO_DELAY:
62d9f0db 2098 case KVM_CAP_MP_STATE:
ed848624 2099 case KVM_CAP_SYNC_MMU:
a355c85c 2100 case KVM_CAP_USER_NMI:
52d939a0 2101 case KVM_CAP_REINJECT_CONTROL:
4925663a 2102 case KVM_CAP_IRQ_INJECT_STATUS:
e56d532f 2103 case KVM_CAP_ASSIGN_DEV_IRQ:
721eecbf 2104 case KVM_CAP_IRQFD:
d34e6b17 2105 case KVM_CAP_IOEVENTFD:
c5ff41ce 2106 case KVM_CAP_PIT2:
e9f42757 2107 case KVM_CAP_PIT_STATE2:
b927a3ce 2108 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
ffde22ac 2109 case KVM_CAP_XEN_HVM:
afbcf7ab 2110 case KVM_CAP_ADJUST_CLOCK:
3cfc3092 2111 case KVM_CAP_VCPU_EVENTS:
55cd8e5a 2112 case KVM_CAP_HYPERV:
10388a07 2113 case KVM_CAP_HYPERV_VAPIC:
c25bc163 2114 case KVM_CAP_HYPERV_SPIN:
ab9f4ecb 2115 case KVM_CAP_PCI_SEGMENT:
a1efbe77 2116 case KVM_CAP_DEBUGREGS:
d2be1651 2117 case KVM_CAP_X86_ROBUST_SINGLESTEP:
2d5b5a66 2118 case KVM_CAP_XSAVE:
344d9588 2119 case KVM_CAP_ASYNC_PF:
92a1f12d 2120 case KVM_CAP_GET_TSC_KHZ:
018d00d2
ZX		 2121 r = 1;
2122 break;
542472b5
LV		 2123 case KVM_CAP_COALESCED_MMIO:
2124 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
2125 break;
774ead3a
AK		 2126 case KVM_CAP_VAPIC:
2127 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
2128 break;
f725230a 2129 case KVM_CAP_NR_VCPUS:
8c3ba334
SL		 2130 r = KVM_SOFT_MAX_VCPUS;
2131 break;
2132 case KVM_CAP_MAX_VCPUS:
f725230a
AK		 2133 r = KVM_MAX_VCPUS;
2134 break;
a988b910
AK		 2135 case KVM_CAP_NR_MEMSLOTS:
2136 r = KVM_MEMORY_SLOTS;
2137 break;
a68a6a72
MT		 2138 case KVM_CAP_PV_MMU: /* obsolete */
2139 r = 0;
2f333bcb 2140 break;
62c476c7 2141 case KVM_CAP_IOMMU:
a1b60c1c 2142 r = iommu_present(&pci_bus_type);
62c476c7 2143 break;
890ca9ae
HY		 2144 case KVM_CAP_MCE:
2145 r = KVM_MAX_MCE_BANKS;
2146 break;
2d5b5a66
SY		 2147 case KVM_CAP_XCRS:
2148 r = cpu_has_xsave;
2149 break;
92a1f12d
JR		 2150 case KVM_CAP_TSC_CONTROL:
2151 r = kvm_has_tsc_control;
2152 break;
4d25a066
JK		 2153 case KVM_CAP_TSC_DEADLINE_TIMER:
2154 r = boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER);
2155 break;
018d00d2
ZX		 2156 default:
2157 r = 0;
2158 break;
2159 }
2160 return r;
2161
2162}
2163
043405e1
CO		 2164long kvm_arch_dev_ioctl(struct file *filp,
2165 unsigned int ioctl, unsigned long arg)
2166{
2167 void __user *argp = (void __user *)arg;
2168 long r;
2169
2170 switch (ioctl) {
2171 case KVM_GET_MSR_INDEX_LIST: {
2172 struct kvm_msr_list __user *user_msr_list = argp;
2173 struct kvm_msr_list msr_list;
2174 unsigned n;
2175
2176 r = -EFAULT;
2177 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
2178 goto out;
2179 n = msr_list.nmsrs;
2180 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
2181 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
2182 goto out;
2183 r = -E2BIG;
e125e7b6 2184 if (n < msr_list.nmsrs)
043405e1
CO		 2185 goto out;
2186 r = -EFAULT;
2187 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
2188 num_msrs_to_save * sizeof(u32)))
2189 goto out;
e125e7b6 2190 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
043405e1
CO		 2191 &emulated_msrs,
2192 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
2193 goto out;
2194 r = 0;
2195 break;
2196 }
674eea0f
AK		 2197 case KVM_GET_SUPPORTED_CPUID: {
2198 struct kvm_cpuid2 __user *cpuid_arg = argp;
2199 struct kvm_cpuid2 cpuid;
2200
2201 r = -EFAULT;
2202 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2203 goto out;
2204 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
19355475 2205 cpuid_arg->entries);
674eea0f
AK		 2206 if (r)
2207 goto out;
2208
2209 r = -EFAULT;
2210 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2211 goto out;
2212 r = 0;
2213 break;
2214 }
890ca9ae
HY		 2215 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
2216 u64 mce_cap;
2217
2218 mce_cap = KVM_MCE_CAP_SUPPORTED;
2219 r = -EFAULT;
2220 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
2221 goto out;
2222 r = 0;
2223 break;
2224 }
043405e1
CO		 2225 default:
2226 r = -EINVAL;
2227 }
2228out:
2229 return r;
2230}
2231
f5f48ee1
SY		 2232static void wbinvd_ipi(void *garbage)
2233{
2234 wbinvd();
2235}
2236
2237static bool need_emulate_wbinvd(struct kvm_vcpu *vcpu)
2238{
2239 return vcpu->kvm->arch.iommu_domain &&
2240 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY);
2241}
2242
313a3dc7
CO		 2243void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
2244{
f5f48ee1
SY		 2245 /* Address WBINVD may be executed by guest */
2246 if (need_emulate_wbinvd(vcpu)) {
2247 if (kvm_x86_ops->has_wbinvd_exit())
2248 cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
2249 else if (vcpu->cpu != -1 && vcpu->cpu != cpu)
2250 smp_call_function_single(vcpu->cpu,
2251 wbinvd_ipi, NULL, 1);
2252 }
2253
313a3dc7 2254 kvm_x86_ops->vcpu_load(vcpu, cpu);
0dd6a6ed
ZA		 2255
2256 /* Apply any externally detected TSC adjustments (due to suspend) */
2257 if (unlikely(vcpu->arch.tsc_offset_adjustment)) {
2258 adjust_tsc_offset_host(vcpu, vcpu->arch.tsc_offset_adjustment);
2259 vcpu->arch.tsc_offset_adjustment = 0;
2260 set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests);
2261 }
2262
48434c20 2263 if (unlikely(vcpu->cpu != cpu) || check_tsc_unstable()) {
6f526ec5
ZA		 2264 s64 tsc_delta = !vcpu->arch.last_host_tsc ? 0 :
2265 native_read_tsc() - vcpu->arch.last_host_tsc;
e48672fa
ZA		 2266 if (tsc_delta < 0)
2267 mark_tsc_unstable("KVM discovered backwards TSC");
c285545f 2268 if (check_tsc_unstable()) {
b183aa58
ZA		 2269 u64 offset = kvm_x86_ops->compute_tsc_offset(vcpu,
2270 vcpu->arch.last_guest_tsc);
2271 kvm_x86_ops->write_tsc_offset(vcpu, offset);
c285545f 2272 vcpu->arch.tsc_catchup = 1;
c285545f 2273 }
1aa8ceef 2274 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
c285545f
ZA		 2275 if (vcpu->cpu != cpu)
2276 kvm_migrate_timers(vcpu);
e48672fa 2277 vcpu->cpu = cpu;
6b7d7e76 2278 }
c9aaa895
GC		 2279
2280 accumulate_steal_time(vcpu);
2281 kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu);
313a3dc7
CO		 2282}
2283
2284void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
2285{
02daab21 2286 kvm_x86_ops->vcpu_put(vcpu);
1c11e713 2287 kvm_put_guest_fpu(vcpu);
6f526ec5 2288 vcpu->arch.last_host_tsc = native_read_tsc();
313a3dc7
CO		 2289}
2290
313a3dc7
CO		 2291static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2292 struct kvm_lapic_state *s)
2293{
ad312c7c 2294 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
313a3dc7
CO		 2295
2296 return 0;
2297}
2298
2299static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2300 struct kvm_lapic_state *s)
2301{
ad312c7c 2302 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
313a3dc7 2303 kvm_apic_post_state_restore(vcpu);
cb142eb7 2304 update_cr8_intercept(vcpu);
313a3dc7
CO		 2305
2306 return 0;
2307}
2308
f77bc6a4
ZX		 2309static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2310 struct kvm_interrupt *irq)
2311{
2312 if (irq->irq < 0 || irq->irq >= 256)
2313 return -EINVAL;
2314 if (irqchip_in_kernel(vcpu->kvm))
2315 return -ENXIO;
f77bc6a4 2316
66fd3f7f 2317 kvm_queue_interrupt(vcpu, irq->irq, false);
3842d135 2318 kvm_make_request(KVM_REQ_EVENT, vcpu);
f77bc6a4 2319
f77bc6a4
ZX		 2320 return 0;
2321}
2322
c4abb7c9
JK		 2323static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
2324{
c4abb7c9 2325 kvm_inject_nmi(vcpu);
c4abb7c9
JK		 2326
2327 return 0;
2328}
2329
b209749f
AK		 2330static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
2331 struct kvm_tpr_access_ctl *tac)
2332{
2333 if (tac->flags)
2334 return -EINVAL;
2335 vcpu->arch.tpr_access_reporting = !!tac->enabled;
2336 return 0;
2337}
2338
890ca9ae
HY		 2339static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
2340 u64 mcg_cap)
2341{
2342 int r;
2343 unsigned bank_num = mcg_cap & 0xff, bank;
2344
2345 r = -EINVAL;
a9e38c3e 2346 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
890ca9ae
HY		 2347 goto out;
2348 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2349 goto out;
2350 r = 0;
2351 vcpu->arch.mcg_cap = mcg_cap;
2352 /* Init IA32_MCG_CTL to all 1s */
2353 if (mcg_cap & MCG_CTL_P)
2354 vcpu->arch.mcg_ctl = ~(u64)0;
2355 /* Init IA32_MCi_CTL to all 1s */
2356 for (bank = 0; bank < bank_num; bank++)
2357 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2358out:
2359 return r;
2360}
2361
2362static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2363 struct kvm_x86_mce *mce)
2364{
2365 u64 mcg_cap = vcpu->arch.mcg_cap;
2366 unsigned bank_num = mcg_cap & 0xff;
2367 u64 *banks = vcpu->arch.mce_banks;
2368
2369 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2370 return -EINVAL;
2371 /*
2372 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2373 * reporting is disabled
2374 */
2375 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2376 vcpu->arch.mcg_ctl != ~(u64)0)
2377 return 0;
2378 banks += 4 * mce->bank;
2379 /*
2380 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2381 * reporting is disabled for the bank
2382 */
2383 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2384 return 0;
2385 if (mce->status & MCI_STATUS_UC) {
2386 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
fc78f519 2387 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
a8eeb04a 2388 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
890ca9ae
HY		 2389 return 0;
2390 }
2391 if (banks[1] & MCI_STATUS_VAL)
2392 mce->status |= MCI_STATUS_OVER;
2393 banks[2] = mce->addr;
2394 banks[3] = mce->misc;
2395 vcpu->arch.mcg_status = mce->mcg_status;
2396 banks[1] = mce->status;
2397 kvm_queue_exception(vcpu, MC_VECTOR);
2398 } else if (!(banks[1] & MCI_STATUS_VAL)
2399 || !(banks[1] & MCI_STATUS_UC)) {
2400 if (banks[1] & MCI_STATUS_VAL)
2401 mce->status |= MCI_STATUS_OVER;
2402 banks[2] = mce->addr;
2403 banks[3] = mce->misc;
2404 banks[1] = mce->status;
2405 } else
2406 banks[1] |= MCI_STATUS_OVER;
2407 return 0;
2408}
2409
3cfc3092
JK		 2410static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2411 struct kvm_vcpu_events *events)
2412{
7460fb4a 2413 process_nmi(vcpu);
03b82a30
JK		 2414 events->exception.injected =
2415 vcpu->arch.exception.pending &&
2416 !kvm_exception_is_soft(vcpu->arch.exception.nr);
3cfc3092
JK		 2417 events->exception.nr = vcpu->arch.exception.nr;
2418 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
97e69aa6 2419 events->exception.pad = 0;
3cfc3092
JK		 2420 events->exception.error_code = vcpu->arch.exception.error_code;
2421
03b82a30
JK		 2422 events->interrupt.injected =
2423 vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
3cfc3092 2424 events->interrupt.nr = vcpu->arch.interrupt.nr;
03b82a30 2425 events->interrupt.soft = 0;
48005f64
JK		 2426 events->interrupt.shadow =
2427 kvm_x86_ops->get_interrupt_shadow(vcpu,
2428 KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
3cfc3092
JK		 2429
2430 events->nmi.injected = vcpu->arch.nmi_injected;
7460fb4a 2431 events->nmi.pending = vcpu->arch.nmi_pending != 0;
3cfc3092 2432 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
97e69aa6 2433 events->nmi.pad = 0;
3cfc3092
JK		 2434
2435 events->sipi_vector = vcpu->arch.sipi_vector;
2436
dab4b911 2437 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
48005f64
JK		 2438 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2439 | KVM_VCPUEVENT_VALID_SHADOW);
97e69aa6 2440 memset(&events->reserved, 0, sizeof(events->reserved));
3cfc3092
JK		 2441}
2442
2443static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2444 struct kvm_vcpu_events *events)
2445{
dab4b911 2446 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
48005f64
JK		 2447 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2448 | KVM_VCPUEVENT_VALID_SHADOW))
3cfc3092
JK		 2449 return -EINVAL;
2450
7460fb4a 2451 process_nmi(vcpu);
3cfc3092
JK		 2452 vcpu->arch.exception.pending = events->exception.injected;
2453 vcpu->arch.exception.nr = events->exception.nr;
2454 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2455 vcpu->arch.exception.error_code = events->exception.error_code;
2456
2457 vcpu->arch.interrupt.pending = events->interrupt.injected;
2458 vcpu->arch.interrupt.nr = events->interrupt.nr;
2459 vcpu->arch.interrupt.soft = events->interrupt.soft;
48005f64
JK		 2460 if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
2461 kvm_x86_ops->set_interrupt_shadow(vcpu,
2462 events->interrupt.shadow);
3cfc3092
JK		 2463
2464 vcpu->arch.nmi_injected = events->nmi.injected;
dab4b911
JK		 2465 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2466 vcpu->arch.nmi_pending = events->nmi.pending;
3cfc3092
JK		 2467 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2468
dab4b911
JK		 2469 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2470 vcpu->arch.sipi_vector = events->sipi_vector;
3cfc3092 2471
3842d135
AK		 2472 kvm_make_request(KVM_REQ_EVENT, vcpu);
2473
3cfc3092
JK		 2474 return 0;
2475}
2476
a1efbe77
JK		 2477static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
2478 struct kvm_debugregs *dbgregs)
2479{
a1efbe77
JK		 2480 memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
2481 dbgregs->dr6 = vcpu->arch.dr6;
2482 dbgregs->dr7 = vcpu->arch.dr7;
2483 dbgregs->flags = 0;
97e69aa6 2484 memset(&dbgregs->reserved, 0, sizeof(dbgregs->reserved));
a1efbe77
JK		 2485}
2486
2487static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
2488 struct kvm_debugregs *dbgregs)
2489{
2490 if (dbgregs->flags)
2491 return -EINVAL;
2492
a1efbe77
JK		 2493 memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
2494 vcpu->arch.dr6 = dbgregs->dr6;
2495 vcpu->arch.dr7 = dbgregs->dr7;
2496
a1efbe77
JK		 2497 return 0;
2498}
2499
2d5b5a66
SY		 2500static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu,
2501 struct kvm_xsave *guest_xsave)
2502{
2503 if (cpu_has_xsave)
2504 memcpy(guest_xsave->region,
2505 &vcpu->arch.guest_fpu.state->xsave,
f45755b8 2506 xstate_size);
2d5b5a66
SY		 2507 else {
2508 memcpy(guest_xsave->region,
2509 &vcpu->arch.guest_fpu.state->fxsave,
2510 sizeof(struct i387_fxsave_struct));
2511 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] =
2512 XSTATE_FPSSE;
2513 }
2514}
2515
2516static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu,
2517 struct kvm_xsave *guest_xsave)
2518{
2519 u64 xstate_bv =
2520 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)];
2521
2522 if (cpu_has_xsave)
2523 memcpy(&vcpu->arch.guest_fpu.state->xsave,
f45755b8 2524 guest_xsave->region, xstate_size);
2d5b5a66
SY		 2525 else {
2526 if (xstate_bv & ~XSTATE_FPSSE)
2527 return -EINVAL;
2528 memcpy(&vcpu->arch.guest_fpu.state->fxsave,
2529 guest_xsave->region, sizeof(struct i387_fxsave_struct));
2530 }
2531 return 0;
2532}
2533
2534static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu,
2535 struct kvm_xcrs *guest_xcrs)
2536{
2537 if (!cpu_has_xsave) {
2538 guest_xcrs->nr_xcrs = 0;
2539 return;
2540 }
2541
2542 guest_xcrs->nr_xcrs = 1;
2543 guest_xcrs->flags = 0;
2544 guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK;
2545 guest_xcrs->xcrs[0].value = vcpu->arch.xcr0;
2546}
2547
2548static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu,
2549 struct kvm_xcrs *guest_xcrs)
2550{
2551 int i, r = 0;
2552
2553 if (!cpu_has_xsave)
2554 return -EINVAL;
2555
2556 if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags)
2557 return -EINVAL;
2558
2559 for (i = 0; i < guest_xcrs->nr_xcrs; i++)
2560 /* Only support XCR0 currently */
2561 if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) {
2562 r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK,
2563 guest_xcrs->xcrs[0].value);
2564 break;
2565 }
2566 if (r)
2567 r = -EINVAL;
2568 return r;
2569}
2570
313a3dc7
CO		 2571long kvm_arch_vcpu_ioctl(struct file *filp,
2572 unsigned int ioctl, unsigned long arg)
2573{
2574 struct kvm_vcpu *vcpu = filp->private_data;
2575 void __user *argp = (void __user *)arg;
2576 int r;
d1ac91d8
AK		 2577 union {
2578 struct kvm_lapic_state *lapic;
2579 struct kvm_xsave *xsave;
2580 struct kvm_xcrs *xcrs;
2581 void *buffer;
2582 } u;
2583
2584 u.buffer = NULL;
313a3dc7
CO		 2585 switch (ioctl) {
2586 case KVM_GET_LAPIC: {
2204ae3c
MT		 2587 r = -EINVAL;
2588 if (!vcpu->arch.apic)
2589 goto out;
d1ac91d8 2590 u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
313a3dc7 2591
b772ff36 2592 r = -ENOMEM;
d1ac91d8 2593 if (!u.lapic)
b772ff36 2594 goto out;
d1ac91d8 2595 r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic);
313a3dc7
CO		 2596 if (r)
2597 goto out;
2598 r = -EFAULT;
d1ac91d8 2599 if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state)))
313a3dc7
CO		 2600 goto out;
2601 r = 0;
2602 break;
2603 }
2604 case KVM_SET_LAPIC: {
2204ae3c
MT		 2605 r = -EINVAL;
2606 if (!vcpu->arch.apic)
2607 goto out;
ff5c2c03
SL		 2608 u.lapic = memdup_user(argp, sizeof(*u.lapic));
2609 if (IS_ERR(u.lapic)) {
2610 r = PTR_ERR(u.lapic);
313a3dc7 2611 goto out;
ff5c2c03
SL		 2612 }
2613
d1ac91d8 2614 r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic);
313a3dc7
CO		 2615 if (r)
2616 goto out;
2617 r = 0;
2618 break;
2619 }
f77bc6a4
ZX		 2620 case KVM_INTERRUPT: {
2621 struct kvm_interrupt irq;
2622
2623 r = -EFAULT;
2624 if (copy_from_user(&irq, argp, sizeof irq))
2625 goto out;
2626 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2627 if (r)
2628 goto out;
2629 r = 0;
2630 break;
2631 }
c4abb7c9
JK		 2632 case KVM_NMI: {
2633 r = kvm_vcpu_ioctl_nmi(vcpu);
2634 if (r)
2635 goto out;
2636 r = 0;
2637 break;
2638 }
313a3dc7
CO		 2639 case KVM_SET_CPUID: {
2640 struct kvm_cpuid __user *cpuid_arg = argp;
2641 struct kvm_cpuid cpuid;
2642
2643 r = -EFAULT;
2644 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2645 goto out;
2646 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2647 if (r)
2648 goto out;
2649 break;
2650 }
07716717
DK		 2651 case KVM_SET_CPUID2: {
2652 struct kvm_cpuid2 __user *cpuid_arg = argp;
2653 struct kvm_cpuid2 cpuid;
2654
2655 r = -EFAULT;
2656 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2657 goto out;
2658 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
19355475 2659 cpuid_arg->entries);
07716717
DK		 2660 if (r)
2661 goto out;
2662 break;
2663 }
2664 case KVM_GET_CPUID2: {
2665 struct kvm_cpuid2 __user *cpuid_arg = argp;
2666 struct kvm_cpuid2 cpuid;
2667
2668 r = -EFAULT;
2669 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2670 goto out;
2671 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
19355475 2672 cpuid_arg->entries);
07716717
DK		 2673 if (r)
2674 goto out;
2675 r = -EFAULT;
2676 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2677 goto out;
2678 r = 0;
2679 break;
2680 }
313a3dc7
CO		 2681 case KVM_GET_MSRS:
2682 r = msr_io(vcpu, argp, kvm_get_msr, 1);
2683 break;
2684 case KVM_SET_MSRS:
2685 r = msr_io(vcpu, argp, do_set_msr, 0);
2686 break;
b209749f
AK		 2687 case KVM_TPR_ACCESS_REPORTING: {
2688 struct kvm_tpr_access_ctl tac;
2689
2690 r = -EFAULT;
2691 if (copy_from_user(&tac, argp, sizeof tac))
2692 goto out;
2693 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
2694 if (r)
2695 goto out;
2696 r = -EFAULT;
2697 if (copy_to_user(argp, &tac, sizeof tac))
2698 goto out;
2699 r = 0;
2700 break;
2701 };
b93463aa
AK		 2702 case KVM_SET_VAPIC_ADDR: {
2703 struct kvm_vapic_addr va;
2704
2705 r = -EINVAL;
2706 if (!irqchip_in_kernel(vcpu->kvm))
2707 goto out;
2708 r = -EFAULT;
2709 if (copy_from_user(&va, argp, sizeof va))
2710 goto out;
2711 r = 0;
2712 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
2713 break;
2714 }
890ca9ae
HY		 2715 case KVM_X86_SETUP_MCE: {
2716 u64 mcg_cap;
2717
2718 r = -EFAULT;
2719 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
2720 goto out;
2721 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
2722 break;
2723 }
2724 case KVM_X86_SET_MCE: {
2725 struct kvm_x86_mce mce;
2726
2727 r = -EFAULT;
2728 if (copy_from_user(&mce, argp, sizeof mce))
2729 goto out;
2730 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
2731 break;
2732 }
3cfc3092
JK		 2733 case KVM_GET_VCPU_EVENTS: {
2734 struct kvm_vcpu_events events;
2735
2736 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
2737
2738 r = -EFAULT;
2739 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
2740 break;
2741 r = 0;
2742 break;
2743 }
2744 case KVM_SET_VCPU_EVENTS: {
2745 struct kvm_vcpu_events events;
2746
2747 r = -EFAULT;
2748 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
2749 break;
2750
2751 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
2752 break;
2753 }
a1efbe77
JK		 2754 case KVM_GET_DEBUGREGS: {
2755 struct kvm_debugregs dbgregs;
2756
2757 kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
2758
2759 r = -EFAULT;
2760 if (copy_to_user(argp, &dbgregs,
2761 sizeof(struct kvm_debugregs)))
2762 break;
2763 r = 0;
2764 break;
2765 }
2766 case KVM_SET_DEBUGREGS: {
2767 struct kvm_debugregs dbgregs;
2768
2769 r = -EFAULT;
2770 if (copy_from_user(&dbgregs, argp,
2771 sizeof(struct kvm_debugregs)))
2772 break;
2773
2774 r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
2775 break;
2776 }
2d5b5a66 2777 case KVM_GET_XSAVE: {
d1ac91d8 2778 u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
2d5b5a66 2779 r = -ENOMEM;
d1ac91d8 2780 if (!u.xsave)
2d5b5a66
SY		 2781 break;
2782
d1ac91d8 2783 kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave);
2d5b5a66
SY		 2784
2785 r = -EFAULT;
d1ac91d8 2786 if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave)))
2d5b5a66
SY		 2787 break;
2788 r = 0;
2789 break;
2790 }
2791 case KVM_SET_XSAVE: {
ff5c2c03
SL		 2792 u.xsave = memdup_user(argp, sizeof(*u.xsave));
2793 if (IS_ERR(u.xsave)) {
2794 r = PTR_ERR(u.xsave);
2795 goto out;
2796 }
2d5b5a66 2797
d1ac91d8 2798 r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave);
2d5b5a66
SY		 2799 break;
2800 }
2801 case KVM_GET_XCRS: {
d1ac91d8 2802 u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
2d5b5a66 2803 r = -ENOMEM;
d1ac91d8 2804 if (!u.xcrs)
2d5b5a66
SY		 2805 break;
2806
d1ac91d8 2807 kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs);
2d5b5a66
SY		 2808
2809 r = -EFAULT;
d1ac91d8 2810 if (copy_to_user(argp, u.xcrs,
2d5b5a66
SY		 2811 sizeof(struct kvm_xcrs)))
2812 break;
2813 r = 0;
2814 break;
2815 }
2816 case KVM_SET_XCRS: {
ff5c2c03
SL		 2817 u.xcrs = memdup_user(argp, sizeof(*u.xcrs));
2818 if (IS_ERR(u.xcrs)) {
2819 r = PTR_ERR(u.xcrs);
2820 goto out;
2821 }
2d5b5a66 2822
d1ac91d8 2823 r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs);
2d5b5a66
SY		 2824 break;
2825 }
92a1f12d
JR		 2826 case KVM_SET_TSC_KHZ: {
2827 u32 user_tsc_khz;
2828
2829 r = -EINVAL;
92a1f12d
JR		 2830 user_tsc_khz = (u32)arg;
2831
2832 if (user_tsc_khz >= kvm_max_guest_tsc_khz)
2833 goto out;
2834
cc578287
ZA		 2835 if (user_tsc_khz == 0)
2836 user_tsc_khz = tsc_khz;
2837
2838 kvm_set_tsc_khz(vcpu, user_tsc_khz);
92a1f12d
JR		 2839
2840 r = 0;
2841 goto out;
2842 }
2843 case KVM_GET_TSC_KHZ: {
cc578287 2844 r = vcpu->arch.virtual_tsc_khz;
92a1f12d
JR		 2845 goto out;
2846 }
313a3dc7
CO		 2847 default:
2848 r = -EINVAL;
2849 }
2850out:
d1ac91d8 2851 kfree(u.buffer);
313a3dc7
CO		 2852 return r;
2853}
2854
5b1c1493
CO		 2855int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2856{
2857 return VM_FAULT_SIGBUS;
2858}
2859
1fe779f8
CO		 2860static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
2861{
2862 int ret;
2863
2864 if (addr > (unsigned int)(-3 * PAGE_SIZE))
2865 return -1;
2866 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
2867 return ret;
2868}
2869
b927a3ce
SY		 2870static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
2871 u64 ident_addr)
2872{
2873 kvm->arch.ept_identity_map_addr = ident_addr;
2874 return 0;
2875}
2876
1fe779f8
CO		 2877static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
2878 u32 kvm_nr_mmu_pages)
2879{
2880 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
2881 return -EINVAL;
2882
79fac95e 2883 mutex_lock(&kvm->slots_lock);
7c8a83b7 2884 spin_lock(&kvm->mmu_lock);
1fe779f8
CO		 2885
2886 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
f05e70ac 2887 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
1fe779f8 2888
7c8a83b7 2889 spin_unlock(&kvm->mmu_lock);
79fac95e 2890 mutex_unlock(&kvm->slots_lock);
1fe779f8
CO		 2891 return 0;
2892}
2893
2894static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
2895{
39de71ec 2896 return kvm->arch.n_max_mmu_pages;
1fe779f8
CO		 2897}
2898
1fe779f8
CO		 2899static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2900{
2901 int r;
2902
2903 r = 0;
2904 switch (chip->chip_id) {
2905 case KVM_IRQCHIP_PIC_MASTER:
2906 memcpy(&chip->chip.pic,
2907 &pic_irqchip(kvm)->pics[0],
2908 sizeof(struct kvm_pic_state));
2909 break;
2910 case KVM_IRQCHIP_PIC_SLAVE:
2911 memcpy(&chip->chip.pic,
2912 &pic_irqchip(kvm)->pics[1],
2913 sizeof(struct kvm_pic_state));
2914 break;
2915 case KVM_IRQCHIP_IOAPIC:
eba0226b 2916 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
1fe779f8
CO		 2917 break;
2918 default:
2919 r = -EINVAL;
2920 break;
2921 }
2922 return r;
2923}
2924
2925static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2926{
2927 int r;
2928
2929 r = 0;
2930 switch (chip->chip_id) {
2931 case KVM_IRQCHIP_PIC_MASTER:
f4f51050 2932 spin_lock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2933 memcpy(&pic_irqchip(kvm)->pics[0],
2934 &chip->chip.pic,
2935 sizeof(struct kvm_pic_state));
f4f51050 2936 spin_unlock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2937 break;
2938 case KVM_IRQCHIP_PIC_SLAVE:
f4f51050 2939 spin_lock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2940 memcpy(&pic_irqchip(kvm)->pics[1],
2941 &chip->chip.pic,
2942 sizeof(struct kvm_pic_state));
f4f51050 2943 spin_unlock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2944 break;
2945 case KVM_IRQCHIP_IOAPIC:
eba0226b 2946 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
1fe779f8
CO		 2947 break;
2948 default:
2949 r = -EINVAL;
2950 break;
2951 }
2952 kvm_pic_update_irq(pic_irqchip(kvm));
2953 return r;
2954}
2955
e0f63cb9
SY		 2956static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2957{
2958 int r = 0;
2959
894a9c55 2960 mutex_lock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9 2961 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
894a9c55 2962 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9
SY		 2963 return r;
2964}
2965
2966static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2967{
2968 int r = 0;
2969
894a9c55 2970 mutex_lock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9 2971 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
e9f42757
BK		 2972 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
2973 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2974 return r;
2975}
2976
2977static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2978{
2979 int r = 0;
2980
2981 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2982 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
2983 sizeof(ps->channels));
2984 ps->flags = kvm->arch.vpit->pit_state.flags;
2985 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
97e69aa6 2986 memset(&ps->reserved, 0, sizeof(ps->reserved));
e9f42757
BK		 2987 return r;
2988}
2989
2990static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2991{
2992 int r = 0, start = 0;
2993 u32 prev_legacy, cur_legacy;
2994 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2995 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
2996 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
2997 if (!prev_legacy && cur_legacy)
2998 start = 1;
2999 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
3000 sizeof(kvm->arch.vpit->pit_state.channels));
3001 kvm->arch.vpit->pit_state.flags = ps->flags;
3002 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
894a9c55 3003 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9
SY		 3004 return r;
3005}
3006
52d939a0
MT		 3007static int kvm_vm_ioctl_reinject(struct kvm *kvm,
3008 struct kvm_reinject_control *control)
3009{
3010 if (!kvm->arch.vpit)
3011 return -ENXIO;
894a9c55 3012 mutex_lock(&kvm->arch.vpit->pit_state.lock);
52d939a0 3013 kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
894a9c55 3014 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
52d939a0
MT		 3015 return 0;
3016}
3017
95d4c16c
TY		 3018/**
3019 * write_protect_slot - write protect a slot for dirty logging
3020 * @kvm: the kvm instance
3021 * @memslot: the slot we protect
3022 * @dirty_bitmap: the bitmap indicating which pages are dirty
3023 * @nr_dirty_pages: the number of dirty pages
3024 *
3025 * We have two ways to find all sptes to protect:
3026 * 1. Use kvm_mmu_slot_remove_write_access() which walks all shadow pages and
3027 * checks ones that have a spte mapping a page in the slot.
3028 * 2. Use kvm_mmu_rmap_write_protect() for each gfn found in the bitmap.
3029 *
3030 * Generally speaking, if there are not so many dirty pages compared to the
3031 * number of shadow pages, we should use the latter.
3032 *
3033 * Note that letting others write into a page marked dirty in the old bitmap
3034 * by using the remaining tlb entry is not a problem. That page will become
3035 * write protected again when we flush the tlb and then be reported dirty to
3036 * the user space by copying the old bitmap.
3037 */
3038static void write_protect_slot(struct kvm *kvm,
3039 struct kvm_memory_slot *memslot,
3040 unsigned long *dirty_bitmap,
3041 unsigned long nr_dirty_pages)
3042{
3043 /* Not many dirty pages compared to # of shadow pages. */
3044 if (nr_dirty_pages < kvm->arch.n_used_mmu_pages) {
3045 unsigned long gfn_offset;
3046
3047 for_each_set_bit(gfn_offset, dirty_bitmap, memslot->npages) {
3048 unsigned long gfn = memslot->base_gfn + gfn_offset;
3049
3050 spin_lock(&kvm->mmu_lock);
3051 kvm_mmu_rmap_write_protect(kvm, gfn, memslot);
3052 spin_unlock(&kvm->mmu_lock);
3053 }
3054 kvm_flush_remote_tlbs(kvm);
3055 } else {
3056 spin_lock(&kvm->mmu_lock);
3057 kvm_mmu_slot_remove_write_access(kvm, memslot->id);
3058 spin_unlock(&kvm->mmu_lock);
3059 }
3060}
3061
5bb064dc
ZX		 3062/*
3063 * Get (and clear) the dirty memory log for a memory slot.
3064 */
3065int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
3066 struct kvm_dirty_log *log)
3067{
7850ac54 3068 int r;
5bb064dc 3069 struct kvm_memory_slot *memslot;
95d4c16c 3070 unsigned long n, nr_dirty_pages;
5bb064dc 3071
79fac95e 3072 mutex_lock(&kvm->slots_lock);
5bb064dc 3073
b050b015
MT		 3074 r = -EINVAL;
3075 if (log->slot >= KVM_MEMORY_SLOTS)
3076 goto out;
3077
28a37544 3078 memslot = id_to_memslot(kvm->memslots, log->slot);
b050b015
MT		 3079 r = -ENOENT;
3080 if (!memslot->dirty_bitmap)
3081 goto out;
3082
87bf6e7d 3083 n = kvm_dirty_bitmap_bytes(memslot);
95d4c16c 3084 nr_dirty_pages = memslot->nr_dirty_pages;
b050b015 3085
5bb064dc 3086 /* If nothing is dirty, don't bother messing with page tables. */
95d4c16c 3087 if (nr_dirty_pages) {
b050b015 3088 struct kvm_memslots *slots, *old_slots;
28a37544 3089 unsigned long *dirty_bitmap, *dirty_bitmap_head;
b050b015 3090
28a37544
XG		 3091 dirty_bitmap = memslot->dirty_bitmap;
3092 dirty_bitmap_head = memslot->dirty_bitmap_head;
3093 if (dirty_bitmap == dirty_bitmap_head)
3094 dirty_bitmap_head += n / sizeof(long);
3095 memset(dirty_bitmap_head, 0, n);
b050b015 3096
914ebccd 3097 r = -ENOMEM;
cdfca7b3 3098 slots = kmemdup(kvm->memslots, sizeof(*kvm->memslots), GFP_KERNEL);
515a0127 3099 if (!slots)
914ebccd 3100 goto out;
cdfca7b3 3101
28a37544 3102 memslot = id_to_memslot(slots, log->slot);
95d4c16c 3103 memslot->nr_dirty_pages = 0;
28a37544 3104 memslot->dirty_bitmap = dirty_bitmap_head;
be593d62 3105 update_memslots(slots, NULL);
b050b015
MT		 3106
3107 old_slots = kvm->memslots;
3108 rcu_assign_pointer(kvm->memslots, slots);
3109 synchronize_srcu_expedited(&kvm->srcu);
b050b015 3110 kfree(old_slots);
914ebccd 3111
95d4c16c 3112 write_protect_slot(kvm, memslot, dirty_bitmap, nr_dirty_pages);
edde99ce 3113
914ebccd 3114 r = -EFAULT;
515a0127 3115 if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
914ebccd 3116 goto out;
914ebccd
TY		 3117 } else {
3118 r = -EFAULT;
3119 if (clear_user(log->dirty_bitmap, n))
3120 goto out;
5bb064dc 3121 }
b050b015 3122
5bb064dc
ZX		 3123 r = 0;
3124out:
79fac95e 3125 mutex_unlock(&kvm->slots_lock);
5bb064dc
ZX		 3126 return r;
3127}
3128
1fe779f8
CO		 3129long kvm_arch_vm_ioctl(struct file *filp,
3130 unsigned int ioctl, unsigned long arg)
3131{
3132 struct kvm *kvm = filp->private_data;
3133 void __user *argp = (void __user *)arg;
367e1319 3134 int r = -ENOTTY;
f0d66275
DH		 3135 /*
3136 * This union makes it completely explicit to gcc-3.x
3137 * that these two variables' stack usage should be
3138 * combined, not added together.
3139 */
3140 union {
3141 struct kvm_pit_state ps;
e9f42757 3142 struct kvm_pit_state2 ps2;
c5ff41ce 3143 struct kvm_pit_config pit_config;
f0d66275 3144 } u;
1fe779f8
CO		 3145
3146 switch (ioctl) {
3147 case KVM_SET_TSS_ADDR:
3148 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
3149 if (r < 0)
3150 goto out;
3151 break;
b927a3ce
SY		 3152 case KVM_SET_IDENTITY_MAP_ADDR: {
3153 u64 ident_addr;
3154
3155 r = -EFAULT;
3156 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
3157 goto out;
3158 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
3159 if (r < 0)
3160 goto out;
3161 break;
3162 }
1fe779f8
CO		 3163 case KVM_SET_NR_MMU_PAGES:
3164 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
3165 if (r)
3166 goto out;
3167 break;
3168 case KVM_GET_NR_MMU_PAGES:
3169 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
3170 break;
3ddea128
MT		 3171 case KVM_CREATE_IRQCHIP: {
3172 struct kvm_pic *vpic;
3173
3174 mutex_lock(&kvm->lock);
3175 r = -EEXIST;
3176 if (kvm->arch.vpic)
3177 goto create_irqchip_unlock;
1fe779f8 3178 r = -ENOMEM;
3ddea128
MT		 3179 vpic = kvm_create_pic(kvm);
3180 if (vpic) {
1fe779f8
CO		 3181 r = kvm_ioapic_init(kvm);
3182 if (r) {
175504cd 3183 mutex_lock(&kvm->slots_lock);
72bb2fcd 3184 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
743eeb0b
SL		 3185 &vpic->dev_master);
3186 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3187 &vpic->dev_slave);
3188 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3189 &vpic->dev_eclr);
175504cd 3190 mutex_unlock(&kvm->slots_lock);
3ddea128
MT		 3191 kfree(vpic);
3192 goto create_irqchip_unlock;
1fe779f8
CO		 3193 }
3194 } else
3ddea128
MT		 3195 goto create_irqchip_unlock;
3196 smp_wmb();
3197 kvm->arch.vpic = vpic;
3198 smp_wmb();
399ec807
AK		 3199 r = kvm_setup_default_irq_routing(kvm);
3200 if (r) {
175504cd 3201 mutex_lock(&kvm->slots_lock);
3ddea128 3202 mutex_lock(&kvm->irq_lock);
72bb2fcd
WY		 3203 kvm_ioapic_destroy(kvm);
3204 kvm_destroy_pic(kvm);
3ddea128 3205 mutex_unlock(&kvm->irq_lock);
175504cd 3206 mutex_unlock(&kvm->slots_lock);
399ec807 3207 }
3ddea128
MT		 3208 create_irqchip_unlock:
3209 mutex_unlock(&kvm->lock);
1fe779f8 3210 break;
3ddea128 3211 }
7837699f 3212 case KVM_CREATE_PIT:
c5ff41ce
JK		 3213 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
3214 goto create_pit;
3215 case KVM_CREATE_PIT2:
3216 r = -EFAULT;
3217 if (copy_from_user(&u.pit_config, argp,
3218 sizeof(struct kvm_pit_config)))
3219 goto out;
3220 create_pit:
79fac95e 3221 mutex_lock(&kvm->slots_lock);
269e05e4
AK		 3222 r = -EEXIST;
3223 if (kvm->arch.vpit)
3224 goto create_pit_unlock;
7837699f 3225 r = -ENOMEM;
c5ff41ce 3226 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
7837699f
SY		 3227 if (kvm->arch.vpit)
3228 r = 0;
269e05e4 3229 create_pit_unlock:
79fac95e 3230 mutex_unlock(&kvm->slots_lock);
7837699f 3231 break;
4925663a 3232 case KVM_IRQ_LINE_STATUS:
1fe779f8
CO		 3233 case KVM_IRQ_LINE: {
3234 struct kvm_irq_level irq_event;
3235
3236 r = -EFAULT;
3237 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3238 goto out;
160d2f6c 3239 r = -ENXIO;
1fe779f8 3240 if (irqchip_in_kernel(kvm)) {
4925663a 3241 __s32 status;
4925663a
GN		 3242 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
3243 irq_event.irq, irq_event.level);
4925663a 3244 if (ioctl == KVM_IRQ_LINE_STATUS) {
160d2f6c 3245 r = -EFAULT;
4925663a
GN		 3246 irq_event.status = status;
3247 if (copy_to_user(argp, &irq_event,
3248 sizeof irq_event))
3249 goto out;
3250 }
1fe779f8
CO		 3251 r = 0;
3252 }
3253 break;
3254 }
3255 case KVM_GET_IRQCHIP: {
3256 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
ff5c2c03 3257 struct kvm_irqchip *chip;
1fe779f8 3258
ff5c2c03
SL		 3259 chip = memdup_user(argp, sizeof(*chip));
3260 if (IS_ERR(chip)) {
3261 r = PTR_ERR(chip);
1fe779f8 3262 goto out;
ff5c2c03
SL		 3263 }
3264
1fe779f8
CO		 3265 r = -ENXIO;
3266 if (!irqchip_in_kernel(kvm))
f0d66275
DH		 3267 goto get_irqchip_out;
3268 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
1fe779f8 3269 if (r)
f0d66275 3270 goto get_irqchip_out;
1fe779f8 3271 r = -EFAULT;
f0d66275
DH		 3272 if (copy_to_user(argp, chip, sizeof *chip))
3273 goto get_irqchip_out;
1fe779f8 3274 r = 0;
f0d66275
DH		 3275 get_irqchip_out:
3276 kfree(chip);
3277 if (r)
3278 goto out;
1fe779f8
CO		 3279 break;
3280 }
3281 case KVM_SET_IRQCHIP: {
3282 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
ff5c2c03 3283 struct kvm_irqchip *chip;
1fe779f8 3284
ff5c2c03
SL		 3285 chip = memdup_user(argp, sizeof(*chip));
3286 if (IS_ERR(chip)) {
3287 r = PTR_ERR(chip);
1fe779f8 3288 goto out;
ff5c2c03
SL		 3289 }
3290
1fe779f8
CO		 3291 r = -ENXIO;
3292 if (!irqchip_in_kernel(kvm))
f0d66275
DH		 3293 goto set_irqchip_out;
3294 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
1fe779f8 3295 if (r)
f0d66275 3296 goto set_irqchip_out;
1fe779f8 3297 r = 0;
f0d66275
DH		 3298 set_irqchip_out:
3299 kfree(chip);
3300 if (r)
3301 goto out;
1fe779f8
CO		 3302 break;
3303 }
e0f63cb9 3304 case KVM_GET_PIT: {
e0f63cb9 3305 r = -EFAULT;
f0d66275 3306 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
e0f63cb9
SY		 3307 goto out;
3308 r = -ENXIO;
3309 if (!kvm->arch.vpit)
3310 goto out;
f0d66275 3311 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
e0f63cb9
SY		 3312 if (r)
3313 goto out;
3314 r = -EFAULT;
f0d66275 3315 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
e0f63cb9
SY		 3316 goto out;
3317 r = 0;
3318 break;
3319 }
3320 case KVM_SET_PIT: {
e0f63cb9 3321 r = -EFAULT;
f0d66275 3322 if (copy_from_user(&u.ps, argp, sizeof u.ps))
e0f63cb9
SY		 3323 goto out;
3324 r = -ENXIO;
3325 if (!kvm->arch.vpit)
3326 goto out;
f0d66275 3327 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
e0f63cb9
SY		 3328 if (r)
3329 goto out;
3330 r = 0;
3331 break;
3332 }
e9f42757
BK		 3333 case KVM_GET_PIT2: {
3334 r = -ENXIO;
3335 if (!kvm->arch.vpit)
3336 goto out;
3337 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
3338 if (r)
3339 goto out;
3340 r = -EFAULT;
3341 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
3342 goto out;
3343 r = 0;
3344 break;
3345 }
3346 case KVM_SET_PIT2: {
3347 r = -EFAULT;
3348 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
3349 goto out;
3350 r = -ENXIO;
3351 if (!kvm->arch.vpit)
3352 goto out;
3353 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
3354 if (r)
3355 goto out;
3356 r = 0;
3357 break;
3358 }
52d939a0
MT		 3359 case KVM_REINJECT_CONTROL: {
3360 struct kvm_reinject_control control;
3361 r = -EFAULT;
3362 if (copy_from_user(&control, argp, sizeof(control)))
3363 goto out;
3364 r = kvm_vm_ioctl_reinject(kvm, &control);
3365 if (r)
3366 goto out;
3367 r = 0;
3368 break;
3369 }
ffde22ac
ES		 3370 case KVM_XEN_HVM_CONFIG: {
3371 r = -EFAULT;
3372 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
3373 sizeof(struct kvm_xen_hvm_config)))
3374 goto out;
3375 r = -EINVAL;
3376 if (kvm->arch.xen_hvm_config.flags)
3377 goto out;
3378 r = 0;
3379 break;
3380 }
afbcf7ab 3381 case KVM_SET_CLOCK: {
afbcf7ab
GC		 3382 struct kvm_clock_data user_ns;
3383 u64 now_ns;
3384 s64 delta;
3385
3386 r = -EFAULT;
3387 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
3388 goto out;
3389
3390 r = -EINVAL;
3391 if (user_ns.flags)
3392 goto out;
3393
3394 r = 0;
395c6b0a 3395 local_irq_disable();
759379dd 3396 now_ns = get_kernel_ns();
afbcf7ab 3397 delta = user_ns.clock - now_ns;
395c6b0a 3398 local_irq_enable();
afbcf7ab
GC		 3399 kvm->arch.kvmclock_offset = delta;
3400 break;
3401 }
3402 case KVM_GET_CLOCK: {
afbcf7ab
GC		 3403 struct kvm_clock_data user_ns;
3404 u64 now_ns;
3405
395c6b0a 3406 local_irq_disable();
759379dd 3407 now_ns = get_kernel_ns();
afbcf7ab 3408 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
395c6b0a 3409 local_irq_enable();
afbcf7ab 3410 user_ns.flags = 0;
97e69aa6 3411 memset(&user_ns.pad, 0, sizeof(user_ns.pad));
afbcf7ab
GC		 3412
3413 r = -EFAULT;
3414 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3415 goto out;
3416 r = 0;
3417 break;
3418 }
3419
1fe779f8
CO		 3420 default:
3421 ;
3422 }
3423out:
3424 return r;
3425}
3426
a16b043c 3427static void kvm_init_msr_list(void)
043405e1
CO		 3428{
3429 u32 dummy[2];
3430 unsigned i, j;
3431
e3267cbb
GC		 3432 /* skip the first msrs in the list. KVM-specific */
3433 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
043405e1
CO		 3434 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3435 continue;
3436 if (j < i)
3437 msrs_to_save[j] = msrs_to_save[i];
3438 j++;
3439 }
3440 num_msrs_to_save = j;
3441}
3442
bda9020e
MT		 3443static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3444 const void *v)
bbd9b64e 3445{
70252a10
AK		 3446 int handled = 0;
3447 int n;
3448
3449 do {
3450 n = min(len, 8);
3451 if (!(vcpu->arch.apic &&
3452 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, n, v))
3453 && kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
3454 break;
3455 handled += n;
3456 addr += n;
3457 len -= n;
3458 v += n;
3459 } while (len);
bbd9b64e 3460
70252a10 3461 return handled;
bbd9b64e
CO		 3462}
3463
bda9020e 3464static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
bbd9b64e 3465{
70252a10
AK		 3466 int handled = 0;
3467 int n;
3468
3469 do {
3470 n = min(len, 8);
3471 if (!(vcpu->arch.apic &&
3472 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, n, v))
3473 && kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, n, v))
3474 break;
3475 trace_kvm_mmio(KVM_TRACE_MMIO_READ, n, addr, *(u64 *)v);
3476 handled += n;
3477 addr += n;
3478 len -= n;
3479 v += n;
3480 } while (len);
bbd9b64e 3481
70252a10 3482 return handled;
bbd9b64e
CO		 3483}
3484
2dafc6c2
GN		 3485static void kvm_set_segment(struct kvm_vcpu *vcpu,
3486 struct kvm_segment *var, int seg)
3487{
3488 kvm_x86_ops->set_segment(vcpu, var, seg);
3489}
3490
3491void kvm_get_segment(struct kvm_vcpu *vcpu,
3492 struct kvm_segment *var, int seg)
3493{
3494 kvm_x86_ops->get_segment(vcpu, var, seg);
3495}
3496
e459e322 3497gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access)
02f59dc9
JR		 3498{
3499 gpa_t t_gpa;
ab9ae313 3500 struct x86_exception exception;
02f59dc9
JR		 3501
3502 BUG_ON(!mmu_is_nested(vcpu));
3503
3504 /* NPT walks are always user-walks */
3505 access |= PFERR_USER_MASK;
ab9ae313 3506 t_gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, gpa, access, &exception);
02f59dc9
JR		 3507
3508 return t_gpa;
3509}
3510
ab9ae313
AK		 3511gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
3512 struct x86_exception *exception)
1871c602
GN		 3513{
3514 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
ab9ae313 3515 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
1871c602
GN		 3516}
3517
ab9ae313
AK		 3518 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
3519 struct x86_exception *exception)
1871c602
GN		 3520{
3521 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3522 access |= PFERR_FETCH_MASK;
ab9ae313 3523 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
1871c602
GN		 3524}
3525
ab9ae313
AK		 3526gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
3527 struct x86_exception *exception)
1871c602
GN		 3528{
3529 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3530 access |= PFERR_WRITE_MASK;
ab9ae313 3531 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
1871c602
GN		 3532}
3533
3534/* uses this to access any guest's mapped memory without checking CPL */
ab9ae313
AK		 3535gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
3536 struct x86_exception *exception)
1871c602 3537{
ab9ae313 3538 return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, 0, exception);
1871c602
GN		 3539}
3540
3541static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3542 struct kvm_vcpu *vcpu, u32 access,
bcc55cba 3543 struct x86_exception *exception)
bbd9b64e
CO		 3544{
3545 void *data = val;
10589a46 3546 int r = X86EMUL_CONTINUE;
bbd9b64e
CO		 3547
3548 while (bytes) {
14dfe855 3549 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr, access,
ab9ae313 3550 exception);
bbd9b64e 3551 unsigned offset = addr & (PAGE_SIZE-1);
77c2002e 3552 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
bbd9b64e
CO		 3553 int ret;
3554
bcc55cba 3555 if (gpa == UNMAPPED_GVA)
ab9ae313 3556 return X86EMUL_PROPAGATE_FAULT;
77c2002e 3557 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
10589a46 3558 if (ret < 0) {
c3cd7ffa 3559 r = X86EMUL_IO_NEEDED;
10589a46
MT		 3560 goto out;
3561 }
bbd9b64e 3562
77c2002e
IE		 3563 bytes -= toread;
3564 data += toread;
3565 addr += toread;
bbd9b64e 3566 }
10589a46 3567out:
10589a46 3568 return r;
bbd9b64e 3569}
77c2002e 3570
1871c602 3571/* used for instruction fetching */
0f65dd70
AK		 3572static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt,
3573 gva_t addr, void *val, unsigned int bytes,
bcc55cba 3574 struct x86_exception *exception)
1871c602 3575{
0f65dd70 3576 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
1871c602 3577 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
0f65dd70 3578
1871c602 3579 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
bcc55cba
AK		 3580 access | PFERR_FETCH_MASK,
3581 exception);
1871c602
GN		 3582}
3583
064aea77 3584int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
0f65dd70 3585 gva_t addr, void *val, unsigned int bytes,
bcc55cba 3586 struct x86_exception *exception)
1871c602 3587{
0f65dd70 3588 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
1871c602 3589 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
0f65dd70 3590
1871c602 3591 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
bcc55cba 3592 exception);
1871c602 3593}
064aea77 3594EXPORT_SYMBOL_GPL(kvm_read_guest_virt);
1871c602 3595
0f65dd70
AK		 3596static int kvm_read_guest_virt_system(struct x86_emulate_ctxt *ctxt,
3597 gva_t addr, void *val, unsigned int bytes,
bcc55cba 3598 struct x86_exception *exception)
1871c602 3599{
0f65dd70 3600 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
bcc55cba 3601 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, exception);
1871c602
GN		 3602}
3603
6a4d7550 3604int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
0f65dd70 3605 gva_t addr, void *val,
2dafc6c2 3606 unsigned int bytes,
bcc55cba 3607 struct x86_exception *exception)
77c2002e 3608{
0f65dd70 3609 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
77c2002e
IE		 3610 void *data = val;
3611 int r = X86EMUL_CONTINUE;
3612
3613 while (bytes) {
14dfe855
JR		 3614 gpa_t gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, addr,
3615 PFERR_WRITE_MASK,
ab9ae313 3616 exception);
77c2002e
IE		 3617 unsigned offset = addr & (PAGE_SIZE-1);
3618 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
3619 int ret;
3620
bcc55cba 3621 if (gpa == UNMAPPED_GVA)
ab9ae313 3622 return X86EMUL_PROPAGATE_FAULT;
77c2002e
IE		 3623 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
3624 if (ret < 0) {
c3cd7ffa 3625 r = X86EMUL_IO_NEEDED;
77c2002e
IE		 3626 goto out;
3627 }
3628
3629 bytes -= towrite;
3630 data += towrite;
3631 addr += towrite;
3632 }
3633out:
3634 return r;
3635}
6a4d7550 3636EXPORT_SYMBOL_GPL(kvm_write_guest_virt_system);
77c2002e 3637
af7cc7d1
XG		 3638static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
3639 gpa_t *gpa, struct x86_exception *exception,
3640 bool write)
3641{
3642 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3643
bebb106a
XG		 3644 if (vcpu_match_mmio_gva(vcpu, gva) &&
3645 check_write_user_access(vcpu, write, access,
3646 vcpu->arch.access)) {
3647 *gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT |
3648 (gva & (PAGE_SIZE - 1));
4f022648 3649 trace_vcpu_match_mmio(gva, *gpa, write, false);
bebb106a
XG		 3650 return 1;
3651 }
3652
af7cc7d1
XG		 3653 if (write)
3654 access |= PFERR_WRITE_MASK;
3655
3656 *gpa = vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
3657
3658 if (*gpa == UNMAPPED_GVA)
3659 return -1;
3660
3661 /* For APIC access vmexit */
3662 if ((*gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3663 return 1;
3664
4f022648
XG		 3665 if (vcpu_match_mmio_gpa(vcpu, *gpa)) {
3666 trace_vcpu_match_mmio(gva, *gpa, write, true);
bebb106a 3667 return 1;
4f022648 3668 }
bebb106a 3669
af7cc7d1
XG		 3670 return 0;
3671}
3672
3200f405 3673int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
bcc55cba 3674 const void *val, int bytes)
bbd9b64e
CO		 3675{
3676 int ret;
3677
3678 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
9f811285 3679 if (ret < 0)
bbd9b64e 3680 return 0;
f57f2ef5 3681 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
bbd9b64e
CO		 3682 return 1;
3683}
3684
77d197b2
XG		 3685struct read_write_emulator_ops {
3686 int (*read_write_prepare)(struct kvm_vcpu *vcpu, void *val,
3687 int bytes);
3688 int (*read_write_emulate)(struct kvm_vcpu *vcpu, gpa_t gpa,
3689 void *val, int bytes);
3690 int (*read_write_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa,
3691 int bytes, void *val);
3692 int (*read_write_exit_mmio)(struct kvm_vcpu *vcpu, gpa_t gpa,
3693 void *val, int bytes);
3694 bool write;
3695};
3696
3697static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes)
3698{
3699 if (vcpu->mmio_read_completed) {
3700 memcpy(val, vcpu->mmio_data, bytes);
3701 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
3702 vcpu->mmio_phys_addr, *(u64 *)val);
3703 vcpu->mmio_read_completed = 0;
3704 return 1;
3705 }
3706
3707 return 0;
3708}
3709
3710static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa,
3711 void *val, int bytes)
3712{
3713 return !kvm_read_guest(vcpu->kvm, gpa, val, bytes);
3714}
3715
3716static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa,
3717 void *val, int bytes)
3718{
3719 return emulator_write_phys(vcpu, gpa, val, bytes);
3720}
3721
3722static int write_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes, void *val)
3723{
3724 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
3725 return vcpu_mmio_write(vcpu, gpa, bytes, val);
3726}
3727
3728static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa,
3729 void *val, int bytes)
3730{
3731 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
3732 return X86EMUL_IO_NEEDED;
3733}
3734
3735static int write_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa,
3736 void *val, int bytes)
3737{
3738 memcpy(vcpu->mmio_data, val, bytes);
3739 memcpy(vcpu->run->mmio.data, vcpu->mmio_data, 8);
3740 return X86EMUL_CONTINUE;
3741}
3742
3743static struct read_write_emulator_ops read_emultor = {
3744 .read_write_prepare = read_prepare,
3745 .read_write_emulate = read_emulate,
3746 .read_write_mmio = vcpu_mmio_read,
3747 .read_write_exit_mmio = read_exit_mmio,
3748};
3749
3750static struct read_write_emulator_ops write_emultor = {
3751 .read_write_emulate = write_emulate,
3752 .read_write_mmio = write_mmio,
3753 .read_write_exit_mmio = write_exit_mmio,
3754 .write = true,
3755};
3756
22388a3c
XG		 3757static int emulator_read_write_onepage(unsigned long addr, void *val,
3758 unsigned int bytes,
3759 struct x86_exception *exception,
3760 struct kvm_vcpu *vcpu,
3761 struct read_write_emulator_ops *ops)
bbd9b64e 3762{
af7cc7d1
XG		 3763 gpa_t gpa;
3764 int handled, ret;
22388a3c
XG		 3765 bool write = ops->write;
3766
3767 if (ops->read_write_prepare &&
3768 ops->read_write_prepare(vcpu, val, bytes))
3769 return X86EMUL_CONTINUE;
10589a46 3770
22388a3c 3771 ret = vcpu_mmio_gva_to_gpa(vcpu, addr, &gpa, exception, write);
bbd9b64e 3772
af7cc7d1 3773 if (ret < 0)
bbd9b64e 3774 return X86EMUL_PROPAGATE_FAULT;
bbd9b64e
CO		 3775
3776 /* For APIC access vmexit */
af7cc7d1 3777 if (ret)
bbd9b64e
CO		 3778 goto mmio;
3779
22388a3c 3780 if (ops->read_write_emulate(vcpu, gpa, val, bytes))
bbd9b64e
CO		 3781 return X86EMUL_CONTINUE;
3782
3783mmio:
3784 /*
3785 * Is this MMIO handled locally?
3786 */
22388a3c 3787 handled = ops->read_write_mmio(vcpu, gpa, bytes, val);
70252a10 3788 if (handled == bytes)
bbd9b64e 3789 return X86EMUL_CONTINUE;
bbd9b64e 3790
70252a10
AK		 3791 gpa += handled;
3792 bytes -= handled;
3793 val += handled;
3794
bbd9b64e 3795 vcpu->mmio_needed = 1;
411c35b7
GN		 3796 vcpu->run->exit_reason = KVM_EXIT_MMIO;
3797 vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa;
cef4dea0
AK		 3798 vcpu->mmio_size = bytes;
3799 vcpu->run->mmio.len = min(vcpu->mmio_size, 8);
22388a3c 3800 vcpu->run->mmio.is_write = vcpu->mmio_is_write = write;
cef4dea0 3801 vcpu->mmio_index = 0;
bbd9b64e 3802
22388a3c 3803 return ops->read_write_exit_mmio(vcpu, gpa, val, bytes);
bbd9b64e
CO		 3804}
3805
22388a3c
XG		 3806int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr,
3807 void *val, unsigned int bytes,
3808 struct x86_exception *exception,
3809 struct read_write_emulator_ops *ops)
bbd9b64e 3810{
0f65dd70
AK		 3811 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
3812
bbd9b64e
CO		 3813 /* Crossing a page boundary? */
3814 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
3815 int rc, now;
3816
3817 now = -addr & ~PAGE_MASK;
22388a3c
XG		 3818 rc = emulator_read_write_onepage(addr, val, now, exception,
3819 vcpu, ops);
3820
bbd9b64e
CO		 3821 if (rc != X86EMUL_CONTINUE)
3822 return rc;
3823 addr += now;
3824 val += now;
3825 bytes -= now;
3826 }
22388a3c
XG		 3827
3828 return emulator_read_write_onepage(addr, val, bytes, exception,
3829 vcpu, ops);
3830}
3831
3832static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
3833 unsigned long addr,
3834 void *val,
3835 unsigned int bytes,
3836 struct x86_exception *exception)
3837{
3838 return emulator_read_write(ctxt, addr, val, bytes,
3839 exception, &read_emultor);
3840}
3841
3842int emulator_write_emulated(struct x86_emulate_ctxt *ctxt,
3843 unsigned long addr,
3844 const void *val,
3845 unsigned int bytes,
3846 struct x86_exception *exception)
3847{
3848 return emulator_read_write(ctxt, addr, (void *)val, bytes,
3849 exception, &write_emultor);
bbd9b64e 3850}
bbd9b64e 3851
daea3e73
AK		 3852#define CMPXCHG_TYPE(t, ptr, old, new) \
3853 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3854
3855#ifdef CONFIG_X86_64
3856# define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3857#else
3858# define CMPXCHG64(ptr, old, new) \
9749a6c0 3859 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
daea3e73
AK		 3860#endif
3861
0f65dd70
AK		 3862static int emulator_cmpxchg_emulated(struct x86_emulate_ctxt *ctxt,
3863 unsigned long addr,
bbd9b64e
CO		 3864 const void *old,
3865 const void *new,
3866 unsigned int bytes,
0f65dd70 3867 struct x86_exception *exception)
bbd9b64e 3868{
0f65dd70 3869 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
daea3e73
AK		 3870 gpa_t gpa;
3871 struct page *page;
3872 char *kaddr;
3873 bool exchanged;
2bacc55c 3874
daea3e73
AK		 3875 /* guests cmpxchg8b have to be emulated atomically */
3876 if (bytes > 8 || (bytes & (bytes - 1)))
3877 goto emul_write;
10589a46 3878
daea3e73 3879 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
2bacc55c 3880
daea3e73
AK		 3881 if (gpa == UNMAPPED_GVA ||
3882 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3883 goto emul_write;
2bacc55c 3884
daea3e73
AK		 3885 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
3886 goto emul_write;
72dc67a6 3887
daea3e73 3888 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
c19b8bd6
WY		 3889 if (is_error_page(page)) {
3890 kvm_release_page_clean(page);
3891 goto emul_write;
3892 }
72dc67a6 3893
daea3e73
AK		 3894 kaddr = kmap_atomic(page, KM_USER0);
3895 kaddr += offset_in_page(gpa);
3896 switch (bytes) {
3897 case 1:
3898 exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
3899 break;
3900 case 2:
3901 exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
3902 break;
3903 case 4:
3904 exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
3905 break;
3906 case 8:
3907 exchanged = CMPXCHG64(kaddr, old, new);
3908 break;
3909 default:
3910 BUG();
2bacc55c 3911 }
daea3e73
AK		 3912 kunmap_atomic(kaddr, KM_USER0);
3913 kvm_release_page_dirty(page);
3914
3915 if (!exchanged)
3916 return X86EMUL_CMPXCHG_FAILED;
3917
f57f2ef5 3918 kvm_mmu_pte_write(vcpu, gpa, new, bytes);
8f6abd06
GN		 3919
3920 return X86EMUL_CONTINUE;
4a5f48f6 3921
3200f405 3922emul_write:
daea3e73 3923 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
2bacc55c 3924
0f65dd70 3925 return emulator_write_emulated(ctxt, addr, new, bytes, exception);
bbd9b64e
CO		 3926}
3927
cf8f70bf
GN		 3928static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
3929{
3930 /* TODO: String I/O for in kernel device */
3931 int r;
3932
3933 if (vcpu->arch.pio.in)
3934 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
3935 vcpu->arch.pio.size, pd);
3936 else
3937 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
3938 vcpu->arch.pio.port, vcpu->arch.pio.size,
3939 pd);
3940 return r;
3941}
3942
6f6fbe98
XG		 3943static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size,
3944 unsigned short port, void *val,
3945 unsigned int count, bool in)
cf8f70bf 3946{
6f6fbe98 3947 trace_kvm_pio(!in, port, size, count);
cf8f70bf
GN		 3948
3949 vcpu->arch.pio.port = port;
6f6fbe98 3950 vcpu->arch.pio.in = in;
7972995b 3951 vcpu->arch.pio.count = count;
cf8f70bf
GN		 3952 vcpu->arch.pio.size = size;
3953
3954 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
7972995b 3955 vcpu->arch.pio.count = 0;
cf8f70bf
GN		 3956 return 1;
3957 }
3958
3959 vcpu->run->exit_reason = KVM_EXIT_IO;
6f6fbe98 3960 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
cf8f70bf
GN		 3961 vcpu->run->io.size = size;
3962 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3963 vcpu->run->io.count = count;
3964 vcpu->run->io.port = port;
3965
3966 return 0;
3967}
3968
6f6fbe98
XG		 3969static int emulator_pio_in_emulated(struct x86_emulate_ctxt *ctxt,
3970 int size, unsigned short port, void *val,
3971 unsigned int count)
cf8f70bf 3972{
ca1d4a9e 3973 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
6f6fbe98 3974 int ret;
ca1d4a9e 3975
6f6fbe98
XG		 3976 if (vcpu->arch.pio.count)
3977 goto data_avail;
cf8f70bf 3978
6f6fbe98
XG		 3979 ret = emulator_pio_in_out(vcpu, size, port, val, count, true);
3980 if (ret) {
3981data_avail:
3982 memcpy(val, vcpu->arch.pio_data, size * count);
7972995b 3983 vcpu->arch.pio.count = 0;
cf8f70bf
GN		 3984 return 1;
3985 }
3986
cf8f70bf
GN		 3987 return 0;
3988}
3989
6f6fbe98
XG		 3990static int emulator_pio_out_emulated(struct x86_emulate_ctxt *ctxt,
3991 int size, unsigned short port,
3992 const void *val, unsigned int count)
3993{
3994 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
3995
3996 memcpy(vcpu->arch.pio_data, val, size * count);
3997 return emulator_pio_in_out(vcpu, size, port, (void *)val, count, false);
3998}
3999
bbd9b64e
CO		 4000static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
4001{
4002 return kvm_x86_ops->get_segment_base(vcpu, seg);
4003}
4004
3cb16fe7 4005static void emulator_invlpg(struct x86_emulate_ctxt *ctxt, ulong address)
bbd9b64e 4006{
3cb16fe7 4007 kvm_mmu_invlpg(emul_to_vcpu(ctxt), address);
bbd9b64e
CO		 4008}
4009
f5f48ee1
SY		 4010int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu)
4011{
4012 if (!need_emulate_wbinvd(vcpu))
4013 return X86EMUL_CONTINUE;
4014
4015 if (kvm_x86_ops->has_wbinvd_exit()) {
2eec7343
JK		 4016 int cpu = get_cpu();
4017
4018 cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
f5f48ee1
SY		 4019 smp_call_function_many(vcpu->arch.wbinvd_dirty_mask,
4020 wbinvd_ipi, NULL, 1);
2eec7343 4021 put_cpu();
f5f48ee1 4022 cpumask_clear(vcpu->arch.wbinvd_dirty_mask);
2eec7343
JK		 4023 } else
4024 wbinvd();
f5f48ee1
SY		 4025 return X86EMUL_CONTINUE;
4026}
4027EXPORT_SYMBOL_GPL(kvm_emulate_wbinvd);
4028
bcaf5cc5
AK		 4029static void emulator_wbinvd(struct x86_emulate_ctxt *ctxt)
4030{
4031 kvm_emulate_wbinvd(emul_to_vcpu(ctxt));
4032}
4033
717746e3 4034int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
bbd9b64e 4035{
717746e3 4036 return _kvm_get_dr(emul_to_vcpu(ctxt), dr, dest);
bbd9b64e
CO		 4037}
4038
717746e3 4039int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
bbd9b64e 4040{
338dbc97 4041
717746e3 4042 return __kvm_set_dr(emul_to_vcpu(ctxt), dr, value);
bbd9b64e
CO		 4043}
4044
52a46617 4045static u64 mk_cr_64(u64 curr_cr, u32 new_val)
5fdbf976 4046{
52a46617 4047 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
5fdbf976
MT		 4048}
4049
717746e3 4050static unsigned long emulator_get_cr(struct x86_emulate_ctxt *ctxt, int cr)
bbd9b64e 4051{
717746e3 4052 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
52a46617
GN		 4053 unsigned long value;
4054
4055 switch (cr) {
4056 case 0:
4057 value = kvm_read_cr0(vcpu);
4058 break;
4059 case 2:
4060 value = vcpu->arch.cr2;
4061 break;
4062 case 3:
9f8fe504 4063 value = kvm_read_cr3(vcpu);
52a46617
GN		 4064 break;
4065 case 4:
4066 value = kvm_read_cr4(vcpu);
4067 break;
4068 case 8:
4069 value = kvm_get_cr8(vcpu);
4070 break;
4071 default:
4072 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
4073 return 0;
4074 }
4075
4076 return value;
4077}
4078
717746e3 4079static int emulator_set_cr(struct x86_emulate_ctxt *ctxt, int cr, ulong val)
52a46617 4080{
717746e3 4081 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
0f12244f
GN		 4082 int res = 0;
4083
52a46617
GN		 4084 switch (cr) {
4085 case 0:
49a9b07e 4086 res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
52a46617
GN		 4087 break;
4088 case 2:
4089 vcpu->arch.cr2 = val;
4090 break;
4091 case 3:
2390218b 4092 res = kvm_set_cr3(vcpu, val);
52a46617
GN		 4093 break;
4094 case 4:
a83b29c6 4095 res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
52a46617
GN		 4096 break;
4097 case 8:
eea1cff9 4098 res = kvm_set_cr8(vcpu, val);
52a46617
GN		 4099 break;
4100 default:
4101 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
0f12244f 4102 res = -1;
52a46617 4103 }
0f12244f
GN		 4104
4105 return res;
52a46617
GN		 4106}
4107
717746e3 4108static int emulator_get_cpl(struct x86_emulate_ctxt *ctxt)
9c537244 4109{
717746e3 4110 return kvm_x86_ops->get_cpl(emul_to_vcpu(ctxt));
9c537244
GN		 4111}
4112
4bff1e86 4113static void emulator_get_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
2dafc6c2 4114{
4bff1e86 4115 kvm_x86_ops->get_gdt(emul_to_vcpu(ctxt), dt);
2dafc6c2
GN		 4116}
4117
4bff1e86 4118static void emulator_get_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
160ce1f1 4119{
4bff1e86 4120 kvm_x86_ops->get_idt(emul_to_vcpu(ctxt), dt);
160ce1f1
MG		 4121}
4122
1ac9d0cf
AK		 4123static void emulator_set_gdt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
4124{
4125 kvm_x86_ops->set_gdt(emul_to_vcpu(ctxt), dt);
4126}
4127
4128static void emulator_set_idt(struct x86_emulate_ctxt *ctxt, struct desc_ptr *dt)
4129{
4130 kvm_x86_ops->set_idt(emul_to_vcpu(ctxt), dt);
4131}
4132
4bff1e86
AK		 4133static unsigned long emulator_get_cached_segment_base(
4134 struct x86_emulate_ctxt *ctxt, int seg)
5951c442 4135{
4bff1e86 4136 return get_segment_base(emul_to_vcpu(ctxt), seg);
5951c442
GN		 4137}
4138
1aa36616
AK		 4139static bool emulator_get_segment(struct x86_emulate_ctxt *ctxt, u16 *selector,
4140 struct desc_struct *desc, u32 *base3,
4141 int seg)
2dafc6c2
GN		 4142{
4143 struct kvm_segment var;
4144
4bff1e86 4145 kvm_get_segment(emul_to_vcpu(ctxt), &var, seg);
1aa36616 4146 *selector = var.selector;
2dafc6c2
GN		 4147
4148 if (var.unusable)
4149 return false;
4150
4151 if (var.g)
4152 var.limit >>= 12;
4153 set_desc_limit(desc, var.limit);
4154 set_desc_base(desc, (unsigned long)var.base);
5601d05b
GN		 4155#ifdef CONFIG_X86_64
4156 if (base3)
4157 *base3 = var.base >> 32;
4158#endif
2dafc6c2
GN		 4159 desc->type = var.type;
4160 desc->s = var.s;
4161 desc->dpl = var.dpl;
4162 desc->p = var.present;
4163 desc->avl = var.avl;
4164 desc->l = var.l;
4165 desc->d = var.db;
4166 desc->g = var.g;
4167
4168 return true;
4169}
4170
1aa36616
AK		 4171static void emulator_set_segment(struct x86_emulate_ctxt *ctxt, u16 selector,
4172 struct desc_struct *desc, u32 base3,
4173 int seg)
2dafc6c2 4174{
4bff1e86 4175 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
2dafc6c2
GN		 4176 struct kvm_segment var;
4177
1aa36616 4178 var.selector = selector;
2dafc6c2 4179 var.base = get_desc_base(desc);
5601d05b
GN		 4180#ifdef CONFIG_X86_64
4181 var.base |= ((u64)base3) << 32;
4182#endif
2dafc6c2
GN		 4183 var.limit = get_desc_limit(desc);
4184 if (desc->g)
4185 var.limit = (var.limit << 12) | 0xfff;
4186 var.type = desc->type;
4187 var.present = desc->p;
4188 var.dpl = desc->dpl;
4189 var.db = desc->d;
4190 var.s = desc->s;
4191 var.l = desc->l;
4192 var.g = desc->g;
4193 var.avl = desc->avl;
4194 var.present = desc->p;
4195 var.unusable = !var.present;
4196 var.padding = 0;
4197
4198 kvm_set_segment(vcpu, &var, seg);
4199 return;
4200}
4201
717746e3
AK		 4202static int emulator_get_msr(struct x86_emulate_ctxt *ctxt,
4203 u32 msr_index, u64 *pdata)
4204{
4205 return kvm_get_msr(emul_to_vcpu(ctxt), msr_index, pdata);
4206}
4207
4208static int emulator_set_msr(struct x86_emulate_ctxt *ctxt,
4209 u32 msr_index, u64 data)
4210{
4211 return kvm_set_msr(emul_to_vcpu(ctxt), msr_index, data);
4212}
4213
222d21aa
AK		 4214static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt,
4215 u32 pmc, u64 *pdata)
4216{
4217 return kvm_pmu_read_pmc(emul_to_vcpu(ctxt), pmc, pdata);
4218}
4219
6c3287f7
AK		 4220static void emulator_halt(struct x86_emulate_ctxt *ctxt)
4221{
4222 emul_to_vcpu(ctxt)->arch.halt_request = 1;
4223}
4224
5037f6f3
AK		 4225static void emulator_get_fpu(struct x86_emulate_ctxt *ctxt)
4226{
4227 preempt_disable();
5197b808 4228 kvm_load_guest_fpu(emul_to_vcpu(ctxt));
5037f6f3
AK		 4229 /*
4230 * CR0.TS may reference the host fpu state, not the guest fpu state,
4231 * so it may be clear at this point.
4232 */
4233 clts();
4234}
4235
4236static void emulator_put_fpu(struct x86_emulate_ctxt *ctxt)
4237{
4238 preempt_enable();
4239}
4240
2953538e 4241static int emulator_intercept(struct x86_emulate_ctxt *ctxt,
8a76d7f2 4242 struct x86_instruction_info *info,
c4f035c6
AK		 4243 enum x86_intercept_stage stage)
4244{
2953538e 4245 return kvm_x86_ops->check_intercept(emul_to_vcpu(ctxt), info, stage);
c4f035c6
AK		 4246}
4247
bdb42f5a
SB		 4248static bool emulator_get_cpuid(struct x86_emulate_ctxt *ctxt,
4249 u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
4250{
4251 struct kvm_cpuid_entry2 *cpuid = NULL;
4252
4253 if (eax && ecx)
4254 cpuid = kvm_find_cpuid_entry(emul_to_vcpu(ctxt),
4255 *eax, *ecx);
4256
4257 if (cpuid) {
4258 *eax = cpuid->eax;
4259 *ecx = cpuid->ecx;
4260 if (ebx)
4261 *ebx = cpuid->ebx;
4262 if (edx)
4263 *edx = cpuid->edx;
4264 return true;
4265 }
4266
4267 return false;
4268}
4269
14af3f3c 4270static struct x86_emulate_ops emulate_ops = {
1871c602 4271 .read_std = kvm_read_guest_virt_system,
2dafc6c2 4272 .write_std = kvm_write_guest_virt_system,
1871c602 4273 .fetch = kvm_fetch_guest_virt,
bbd9b64e
CO		 4274 .read_emulated = emulator_read_emulated,
4275 .write_emulated = emulator_write_emulated,
4276 .cmpxchg_emulated = emulator_cmpxchg_emulated,
3cb16fe7 4277 .invlpg = emulator_invlpg,
cf8f70bf
GN		 4278 .pio_in_emulated = emulator_pio_in_emulated,
4279 .pio_out_emulated = emulator_pio_out_emulated,
1aa36616
AK		 4280 .get_segment = emulator_get_segment,
4281 .set_segment = emulator_set_segment,
5951c442 4282 .get_cached_segment_base = emulator_get_cached_segment_base,
2dafc6c2 4283 .get_gdt = emulator_get_gdt,
160ce1f1 4284 .get_idt = emulator_get_idt,
1ac9d0cf
AK		 4285 .set_gdt = emulator_set_gdt,
4286 .set_idt = emulator_set_idt,
52a46617
GN		 4287 .get_cr = emulator_get_cr,
4288 .set_cr = emulator_set_cr,
9c537244 4289 .cpl = emulator_get_cpl,
35aa5375
GN		 4290 .get_dr = emulator_get_dr,
4291 .set_dr = emulator_set_dr,
717746e3
AK		 4292 .set_msr = emulator_set_msr,
4293 .get_msr = emulator_get_msr,
222d21aa 4294 .read_pmc = emulator_read_pmc,
6c3287f7 4295 .halt = emulator_halt,
bcaf5cc5 4296 .wbinvd = emulator_wbinvd,
d6aa1000 4297 .fix_hypercall = emulator_fix_hypercall,
5037f6f3
AK		 4298 .get_fpu = emulator_get_fpu,
4299 .put_fpu = emulator_put_fpu,
c4f035c6 4300 .intercept = emulator_intercept,
bdb42f5a 4301 .get_cpuid = emulator_get_cpuid,
bbd9b64e
CO		 4302};
4303
5fdbf976
MT		 4304static void cache_all_regs(struct kvm_vcpu *vcpu)
4305{
4306 kvm_register_read(vcpu, VCPU_REGS_RAX);
4307 kvm_register_read(vcpu, VCPU_REGS_RSP);
4308 kvm_register_read(vcpu, VCPU_REGS_RIP);
4309 vcpu->arch.regs_dirty = ~0;
4310}
4311
95cb2295
GN		 4312static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask)
4313{
4314 u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask);
4315 /*
4316 * an sti; sti; sequence only disable interrupts for the first
4317 * instruction. So, if the last instruction, be it emulated or
4318 * not, left the system with the INT_STI flag enabled, it
4319 * means that the last instruction is an sti. We should not
4320 * leave the flag on in this case. The same goes for mov ss
4321 */
4322 if (!(int_shadow & mask))
4323 kvm_x86_ops->set_interrupt_shadow(vcpu, mask);
4324}
4325
54b8486f
GN		 4326static void inject_emulated_exception(struct kvm_vcpu *vcpu)
4327{
4328 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
da9cb575 4329 if (ctxt->exception.vector == PF_VECTOR)
6389ee94 4330 kvm_propagate_fault(vcpu, &ctxt->exception);
da9cb575
AK		 4331 else if (ctxt->exception.error_code_valid)
4332 kvm_queue_exception_e(vcpu, ctxt->exception.vector,
4333 ctxt->exception.error_code);
54b8486f 4334 else
da9cb575 4335 kvm_queue_exception(vcpu, ctxt->exception.vector);
54b8486f
GN		 4336}
4337
9dac77fa 4338static void init_decode_cache(struct x86_emulate_ctxt *ctxt,
b5c9ff73
TY		 4339 const unsigned long *regs)
4340{
9dac77fa
AK		 4341 memset(&ctxt->twobyte, 0,
4342 (void *)&ctxt->regs - (void *)&ctxt->twobyte);
4343 memcpy(ctxt->regs, regs, sizeof(ctxt->regs));
b5c9ff73 4344
9dac77fa
AK		 4345 ctxt->fetch.start = 0;
4346 ctxt->fetch.end = 0;
4347 ctxt->io_read.pos = 0;
4348 ctxt->io_read.end = 0;
4349 ctxt->mem_read.pos = 0;
4350 ctxt->mem_read.end = 0;
b5c9ff73
TY		 4351}
4352
8ec4722d
MG		 4353static void init_emulate_ctxt(struct kvm_vcpu *vcpu)
4354{
adf52235 4355 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
8ec4722d
MG		 4356 int cs_db, cs_l;
4357
2aab2c5b
GN		 4358 /*
4359 * TODO: fix emulate.c to use guest_read/write_register
4360 * instead of direct ->regs accesses, can save hundred cycles
4361 * on Intel for instructions that don't read/change RSP, for
4362 * for example.
4363 */
8ec4722d
MG		 4364 cache_all_regs(vcpu);
4365
4366 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4367
adf52235
TY		 4368 ctxt->eflags = kvm_get_rflags(vcpu);
4369 ctxt->eip = kvm_rip_read(vcpu);
4370 ctxt->mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
4371 (ctxt->eflags & X86_EFLAGS_VM) ? X86EMUL_MODE_VM86 :
4372 cs_l ? X86EMUL_MODE_PROT64 :
4373 cs_db ? X86EMUL_MODE_PROT32 :
4374 X86EMUL_MODE_PROT16;
4375 ctxt->guest_mode = is_guest_mode(vcpu);
4376
9dac77fa 4377 init_decode_cache(ctxt, vcpu->arch.regs);
7ae441ea 4378 vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
8ec4722d
MG		 4379}
4380
71f9833b 4381int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip)
63995653 4382{
9d74191a 4383 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
63995653
MG		 4384 int ret;
4385
4386 init_emulate_ctxt(vcpu);
4387
9dac77fa
AK		 4388 ctxt->op_bytes = 2;
4389 ctxt->ad_bytes = 2;
4390 ctxt->_eip = ctxt->eip + inc_eip;
9d74191a 4391 ret = emulate_int_real(ctxt, irq);
63995653
MG		 4392
4393 if (ret != X86EMUL_CONTINUE)
4394 return EMULATE_FAIL;
4395
9dac77fa
AK		 4396 ctxt->eip = ctxt->_eip;
4397 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
9d74191a
TY		 4398 kvm_rip_write(vcpu, ctxt->eip);
4399 kvm_set_rflags(vcpu, ctxt->eflags);
63995653
MG		 4400
4401 if (irq == NMI_VECTOR)
7460fb4a 4402 vcpu->arch.nmi_pending = 0;
63995653
MG		 4403 else
4404 vcpu->arch.interrupt.pending = false;
4405
4406 return EMULATE_DONE;
4407}
4408EXPORT_SYMBOL_GPL(kvm_inject_realmode_interrupt);
4409
6d77dbfc
GN		 4410static int handle_emulation_failure(struct kvm_vcpu *vcpu)
4411{
fc3a9157
JR		 4412 int r = EMULATE_DONE;
4413
6d77dbfc
GN		 4414 ++vcpu->stat.insn_emulation_fail;
4415 trace_kvm_emulate_insn_failed(vcpu);
fc3a9157
JR		 4416 if (!is_guest_mode(vcpu)) {
4417 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4418 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
4419 vcpu->run->internal.ndata = 0;
4420 r = EMULATE_FAIL;
4421 }
6d77dbfc 4422 kvm_queue_exception(vcpu, UD_VECTOR);
fc3a9157
JR		 4423
4424 return r;
6d77dbfc
GN		 4425}
4426
a6f177ef
GN		 4427static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t gva)
4428{
4429 gpa_t gpa;
4430
68be0803
GN		 4431 if (tdp_enabled)
4432 return false;
4433
a6f177ef
GN		 4434 /*
4435 * if emulation was due to access to shadowed page table
4436 * and it failed try to unshadow page and re-entetr the
4437 * guest to let CPU execute the instruction.
4438 */
4439 if (kvm_mmu_unprotect_page_virt(vcpu, gva))
4440 return true;
4441
4442 gpa = kvm_mmu_gva_to_gpa_system(vcpu, gva, NULL);
4443
4444 if (gpa == UNMAPPED_GVA)
4445 return true; /* let cpu generate fault */
4446
4447 if (!kvm_is_error_hva(gfn_to_hva(vcpu->kvm, gpa >> PAGE_SHIFT)))
4448 return true;
4449
4450 return false;
4451}
4452
1cb3f3ae
XG		 4453static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
4454 unsigned long cr2, int emulation_type)
4455{
4456 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
4457 unsigned long last_retry_eip, last_retry_addr, gpa = cr2;
4458
4459 last_retry_eip = vcpu->arch.last_retry_eip;
4460 last_retry_addr = vcpu->arch.last_retry_addr;
4461
4462 /*
4463 * If the emulation is caused by #PF and it is non-page_table
4464 * writing instruction, it means the VM-EXIT is caused by shadow
4465 * page protected, we can zap the shadow page and retry this
4466 * instruction directly.
4467 *
4468 * Note: if the guest uses a non-page-table modifying instruction
4469 * on the PDE that points to the instruction, then we will unmap
4470 * the instruction and go to an infinite loop. So, we cache the
4471 * last retried eip and the last fault address, if we meet the eip
4472 * and the address again, we can break out of the potential infinite
4473 * loop.
4474 */
4475 vcpu->arch.last_retry_eip = vcpu->arch.last_retry_addr = 0;
4476
4477 if (!(emulation_type & EMULTYPE_RETRY))
4478 return false;
4479
4480 if (x86_page_table_writing_insn(ctxt))
4481 return false;
4482
4483 if (ctxt->eip == last_retry_eip && last_retry_addr == cr2)
4484 return false;
4485
4486 vcpu->arch.last_retry_eip = ctxt->eip;
4487 vcpu->arch.last_retry_addr = cr2;
4488
4489 if (!vcpu->arch.mmu.direct_map)
4490 gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL);
4491
4492 kvm_mmu_unprotect_page(vcpu->kvm, gpa >> PAGE_SHIFT);
4493
4494 return true;
4495}
4496
51d8b661
AP		 4497int x86_emulate_instruction(struct kvm_vcpu *vcpu,
4498 unsigned long cr2,
dc25e89e
AP		 4499 int emulation_type,
4500 void *insn,
4501 int insn_len)
bbd9b64e 4502{
95cb2295 4503 int r;
9d74191a 4504 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
7ae441ea 4505 bool writeback = true;
bbd9b64e 4506
26eef70c 4507 kvm_clear_exception_queue(vcpu);
8d7d8102 4508
571008da 4509 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
8ec4722d 4510 init_emulate_ctxt(vcpu);
9d74191a
TY		 4511 ctxt->interruptibility = 0;
4512 ctxt->have_exception = false;
4513 ctxt->perm_ok = false;
bbd9b64e 4514
9d74191a 4515 ctxt->only_vendor_specific_insn
4005996e
AK		 4516 = emulation_type & EMULTYPE_TRAP_UD;
4517
9d74191a 4518 r = x86_decode_insn(ctxt, insn, insn_len);
bbd9b64e 4519
e46479f8 4520 trace_kvm_emulate_insn_start(vcpu);
f2b5756b 4521 ++vcpu->stat.insn_emulation;
1d2887e2 4522 if (r != EMULATION_OK) {
4005996e
AK		 4523 if (emulation_type & EMULTYPE_TRAP_UD)
4524 return EMULATE_FAIL;
a6f177ef 4525 if (reexecute_instruction(vcpu, cr2))
bbd9b64e 4526 return EMULATE_DONE;
6d77dbfc
GN		 4527 if (emulation_type & EMULTYPE_SKIP)
4528 return EMULATE_FAIL;
4529 return handle_emulation_failure(vcpu);
bbd9b64e
CO		 4530 }
4531 }
4532
ba8afb6b 4533 if (emulation_type & EMULTYPE_SKIP) {
9dac77fa 4534 kvm_rip_write(vcpu, ctxt->_eip);
ba8afb6b
GN		 4535 return EMULATE_DONE;
4536 }
4537
1cb3f3ae
XG		 4538 if (retry_instruction(ctxt, cr2, emulation_type))
4539 return EMULATE_DONE;
4540
7ae441ea 4541 /* this is needed for vmware backdoor interface to work since it
4d2179e1 4542 changes registers values during IO operation */
7ae441ea
GN		 4543 if (vcpu->arch.emulate_regs_need_sync_from_vcpu) {
4544 vcpu->arch.emulate_regs_need_sync_from_vcpu = false;
9dac77fa 4545 memcpy(ctxt->regs, vcpu->arch.regs, sizeof ctxt->regs);
7ae441ea 4546 }
4d2179e1 4547
5cd21917 4548restart:
9d74191a 4549 r = x86_emulate_insn(ctxt);
bbd9b64e 4550
775fde86
JR		 4551 if (r == EMULATION_INTERCEPTED)
4552 return EMULATE_DONE;
4553
d2ddd1c4 4554 if (r == EMULATION_FAILED) {
a6f177ef 4555 if (reexecute_instruction(vcpu, cr2))
c3cd7ffa
GN		 4556 return EMULATE_DONE;
4557
6d77dbfc 4558 return handle_emulation_failure(vcpu);
bbd9b64e
CO		 4559 }
4560
9d74191a 4561 if (ctxt->have_exception) {
54b8486f 4562 inject_emulated_exception(vcpu);
d2ddd1c4
GN		 4563 r = EMULATE_DONE;
4564 } else if (vcpu->arch.pio.count) {
3457e419
GN		 4565 if (!vcpu->arch.pio.in)
4566 vcpu->arch.pio.count = 0;
7ae441ea
GN		 4567 else
4568 writeback = false;
e85d28f8 4569 r = EMULATE_DO_MMIO;
7ae441ea
GN		 4570 } else if (vcpu->mmio_needed) {
4571 if (!vcpu->mmio_is_write)
4572 writeback = false;
e85d28f8 4573 r = EMULATE_DO_MMIO;
7ae441ea 4574 } else if (r == EMULATION_RESTART)
5cd21917 4575 goto restart;
d2ddd1c4
GN		 4576 else
4577 r = EMULATE_DONE;
f850e2e6 4578
7ae441ea 4579 if (writeback) {
9d74191a
TY		 4580 toggle_interruptibility(vcpu, ctxt->interruptibility);
4581 kvm_set_rflags(vcpu, ctxt->eflags);
7ae441ea 4582 kvm_make_request(KVM_REQ_EVENT, vcpu);
9dac77fa 4583 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
7ae441ea 4584 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
9d74191a 4585 kvm_rip_write(vcpu, ctxt->eip);
7ae441ea
GN		 4586 } else
4587 vcpu->arch.emulate_regs_need_sync_to_vcpu = true;
e85d28f8
GN		 4588
4589 return r;
de7d789a 4590}
51d8b661 4591EXPORT_SYMBOL_GPL(x86_emulate_instruction);
de7d789a 4592
cf8f70bf 4593int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
de7d789a 4594{
cf8f70bf 4595 unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
ca1d4a9e
AK		 4596 int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt,
4597 size, port, &val, 1);
cf8f70bf 4598 /* do not return to emulator after return from userspace */
7972995b 4599 vcpu->arch.pio.count = 0;
de7d789a
CO		 4600 return ret;
4601}
cf8f70bf 4602EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
de7d789a 4603
8cfdc000
ZA		 4604static void tsc_bad(void *info)
4605{
0a3aee0d 4606 __this_cpu_write(cpu_tsc_khz, 0);
8cfdc000
ZA		 4607}
4608
4609static void tsc_khz_changed(void *data)
c8076604 4610{
8cfdc000
ZA		 4611 struct cpufreq_freqs *freq = data;
4612 unsigned long khz = 0;
4613
4614 if (data)
4615 khz = freq->new;
4616 else if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4617 khz = cpufreq_quick_get(raw_smp_processor_id());
4618 if (!khz)
4619 khz = tsc_khz;
0a3aee0d 4620 __this_cpu_write(cpu_tsc_khz, khz);
c8076604
GH		 4621}
4622
c8076604
GH		 4623static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
4624 void *data)
4625{
4626 struct cpufreq_freqs *freq = data;
4627 struct kvm *kvm;
4628 struct kvm_vcpu *vcpu;
4629 int i, send_ipi = 0;
4630
8cfdc000
ZA		 4631 /*
4632 * We allow guests to temporarily run on slowing clocks,
4633 * provided we notify them after, or to run on accelerating
4634 * clocks, provided we notify them before. Thus time never
4635 * goes backwards.
4636 *
4637 * However, we have a problem. We can't atomically update
4638 * the frequency of a given CPU from this function; it is
4639 * merely a notifier, which can be called from any CPU.
4640 * Changing the TSC frequency at arbitrary points in time
4641 * requires a recomputation of local variables related to
4642 * the TSC for each VCPU. We must flag these local variables
4643 * to be updated and be sure the update takes place with the
4644 * new frequency before any guests proceed.
4645 *
4646 * Unfortunately, the combination of hotplug CPU and frequency
4647 * change creates an intractable locking scenario; the order
4648 * of when these callouts happen is undefined with respect to
4649 * CPU hotplug, and they can race with each other. As such,
4650 * merely setting per_cpu(cpu_tsc_khz) = X during a hotadd is
4651 * undefined; you can actually have a CPU frequency change take
4652 * place in between the computation of X and the setting of the
4653 * variable. To protect against this problem, all updates of
4654 * the per_cpu tsc_khz variable are done in an interrupt
4655 * protected IPI, and all callers wishing to update the value
4656 * must wait for a synchronous IPI to complete (which is trivial
4657 * if the caller is on the CPU already). This establishes the
4658 * necessary total order on variable updates.
4659 *
4660 * Note that because a guest time update may take place
4661 * anytime after the setting of the VCPU's request bit, the
4662 * correct TSC value must be set before the request. However,
4663 * to ensure the update actually makes it to any guest which
4664 * starts running in hardware virtualization between the set
4665 * and the acquisition of the spinlock, we must also ping the
4666 * CPU after setting the request bit.
4667 *
4668 */
4669
c8076604
GH		 4670 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
4671 return 0;
4672 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
4673 return 0;
8cfdc000
ZA		 4674
4675 smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
c8076604 4676
e935b837 4677 raw_spin_lock(&kvm_lock);
c8076604 4678 list_for_each_entry(kvm, &vm_list, vm_list) {
988a2cae 4679 kvm_for_each_vcpu(i, vcpu, kvm) {
c8076604
GH		 4680 if (vcpu->cpu != freq->cpu)
4681 continue;
c285545f 4682 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
c8076604 4683 if (vcpu->cpu != smp_processor_id())
8cfdc000 4684 send_ipi = 1;
c8076604
GH		 4685 }
4686 }
e935b837 4687 raw_spin_unlock(&kvm_lock);
c8076604
GH		 4688
4689 if (freq->old < freq->new && send_ipi) {
4690 /*
4691 * We upscale the frequency. Must make the guest
4692 * doesn't see old kvmclock values while running with
4693 * the new frequency, otherwise we risk the guest sees
4694 * time go backwards.
4695 *
4696 * In case we update the frequency for another cpu
4697 * (which might be in guest context) send an interrupt
4698 * to kick the cpu out of guest context. Next time
4699 * guest context is entered kvmclock will be updated,
4700 * so the guest will not see stale values.
4701 */
8cfdc000 4702 smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
c8076604
GH		 4703 }
4704 return 0;
4705}
4706
4707static struct notifier_block kvmclock_cpufreq_notifier_block = {
8cfdc000
ZA		 4708 .notifier_call = kvmclock_cpufreq_notifier
4709};
4710
4711static int kvmclock_cpu_notifier(struct notifier_block *nfb,
4712 unsigned long action, void *hcpu)
4713{
4714 unsigned int cpu = (unsigned long)hcpu;
4715
4716 switch (action) {
4717 case CPU_ONLINE:
4718 case CPU_DOWN_FAILED:
4719 smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
4720 break;
4721 case CPU_DOWN_PREPARE:
4722 smp_call_function_single(cpu, tsc_bad, NULL, 1);
4723 break;
4724 }
4725 return NOTIFY_OK;
4726}
4727
4728static struct notifier_block kvmclock_cpu_notifier_block = {
4729 .notifier_call = kvmclock_cpu_notifier,
4730 .priority = -INT_MAX
c8076604
GH		 4731};
4732
b820cc0c
ZA		 4733static void kvm_timer_init(void)
4734{
4735 int cpu;
4736
c285545f 4737 max_tsc_khz = tsc_khz;
8cfdc000 4738 register_hotcpu_notifier(&kvmclock_cpu_notifier_block);
b820cc0c 4739 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
c285545f
ZA		 4740#ifdef CONFIG_CPU_FREQ
4741 struct cpufreq_policy policy;
4742 memset(&policy, 0, sizeof(policy));
3e26f230
AK		 4743 cpu = get_cpu();
4744 cpufreq_get_policy(&policy, cpu);
c285545f
ZA		 4745 if (policy.cpuinfo.max_freq)
4746 max_tsc_khz = policy.cpuinfo.max_freq;
3e26f230 4747 put_cpu();
c285545f 4748#endif
b820cc0c
ZA		 4749 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
4750 CPUFREQ_TRANSITION_NOTIFIER);
4751 }
c285545f 4752 pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz);
8cfdc000
ZA		 4753 for_each_online_cpu(cpu)
4754 smp_call_function_single(cpu, tsc_khz_changed, NULL, 1);
b820cc0c
ZA		 4755}
4756
ff9d07a0
ZY		 4757static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
4758
f5132b01 4759int kvm_is_in_guest(void)
ff9d07a0 4760{
086c9855 4761 return __this_cpu_read(current_vcpu) != NULL;
ff9d07a0
ZY		 4762}
4763
4764static int kvm_is_user_mode(void)
4765{
4766 int user_mode = 3;
dcf46b94 4767
086c9855
AS		 4768 if (__this_cpu_read(current_vcpu))
4769 user_mode = kvm_x86_ops->get_cpl(__this_cpu_read(current_vcpu));
dcf46b94 4770
ff9d07a0
ZY		 4771 return user_mode != 0;
4772}
4773
4774static unsigned long kvm_get_guest_ip(void)
4775{
4776 unsigned long ip = 0;
dcf46b94 4777
086c9855
AS		 4778 if (__this_cpu_read(current_vcpu))
4779 ip = kvm_rip_read(__this_cpu_read(current_vcpu));
dcf46b94 4780
ff9d07a0
ZY		 4781 return ip;
4782}
4783
4784static struct perf_guest_info_callbacks kvm_guest_cbs = {
4785 .is_in_guest = kvm_is_in_guest,
4786 .is_user_mode = kvm_is_user_mode,
4787 .get_guest_ip = kvm_get_guest_ip,
4788};
4789
4790void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
4791{
086c9855 4792 __this_cpu_write(current_vcpu, vcpu);
ff9d07a0
ZY		 4793}
4794EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
4795
4796void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
4797{
086c9855 4798 __this_cpu_write(current_vcpu, NULL);
ff9d07a0
ZY		 4799}
4800EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
4801
ce88decf
XG		 4802static void kvm_set_mmio_spte_mask(void)
4803{
4804 u64 mask;
4805 int maxphyaddr = boot_cpu_data.x86_phys_bits;
4806
4807 /*
4808 * Set the reserved bits and the present bit of an paging-structure
4809 * entry to generate page fault with PFER.RSV = 1.
4810 */
4811 mask = ((1ull << (62 - maxphyaddr + 1)) - 1) << maxphyaddr;
4812 mask |= 1ull;
4813
4814#ifdef CONFIG_X86_64
4815 /*
4816 * If reserved bit is not supported, clear the present bit to disable
4817 * mmio page fault.
4818 */
4819 if (maxphyaddr == 52)
4820 mask &= ~1ull;
4821#endif
4822
4823 kvm_mmu_set_mmio_spte_mask(mask);
4824}
4825
f8c16bba 4826int kvm_arch_init(void *opaque)
043405e1 4827{
b820cc0c 4828 int r;
f8c16bba
ZX		 4829 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
4830
f8c16bba
ZX		 4831 if (kvm_x86_ops) {
4832 printk(KERN_ERR "kvm: already loaded the other module\n");
56c6d28a
ZX		 4833 r = -EEXIST;
4834 goto out;
f8c16bba
ZX		 4835 }
4836
4837 if (!ops->cpu_has_kvm_support()) {
4838 printk(KERN_ERR "kvm: no hardware support\n");
56c6d28a
ZX		 4839 r = -EOPNOTSUPP;
4840 goto out;
f8c16bba
ZX		 4841 }
4842 if (ops->disabled_by_bios()) {
4843 printk(KERN_ERR "kvm: disabled by bios\n");
56c6d28a
ZX		 4844 r = -EOPNOTSUPP;
4845 goto out;
f8c16bba
ZX		 4846 }
4847
97db56ce
AK		 4848 r = kvm_mmu_module_init();
4849 if (r)
4850 goto out;
4851
ce88decf 4852 kvm_set_mmio_spte_mask();
97db56ce
AK		 4853 kvm_init_msr_list();
4854
f8c16bba 4855 kvm_x86_ops = ops;
7b52345e 4856 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
4b12f0de 4857 PT_DIRTY_MASK, PT64_NX_MASK, 0);
c8076604 4858
b820cc0c 4859 kvm_timer_init();
c8076604 4860
ff9d07a0
ZY		 4861 perf_register_guest_info_callbacks(&kvm_guest_cbs);
4862
2acf923e
DC		 4863 if (cpu_has_xsave)
4864 host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
4865
f8c16bba 4866 return 0;
56c6d28a
ZX		 4867
4868out:
56c6d28a 4869 return r;
043405e1 4870}
8776e519 4871
f8c16bba
ZX		 4872void kvm_arch_exit(void)
4873{
ff9d07a0
ZY		 4874 perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
4875
888d256e
JK		 4876 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4877 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
4878 CPUFREQ_TRANSITION_NOTIFIER);
8cfdc000 4879 unregister_hotcpu_notifier(&kvmclock_cpu_notifier_block);
f8c16bba 4880 kvm_x86_ops = NULL;
56c6d28a
ZX		 4881 kvm_mmu_module_exit();
4882}
f8c16bba 4883
8776e519
HB		 4884int kvm_emulate_halt(struct kvm_vcpu *vcpu)
4885{
4886 ++vcpu->stat.halt_exits;
4887 if (irqchip_in_kernel(vcpu->kvm)) {
a4535290 4888 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
8776e519
HB		 4889 return 1;
4890 } else {
4891 vcpu->run->exit_reason = KVM_EXIT_HLT;
4892 return 0;
4893 }
4894}
4895EXPORT_SYMBOL_GPL(kvm_emulate_halt);
4896
55cd8e5a
GN		 4897int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
4898{
4899 u64 param, ingpa, outgpa, ret;
4900 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
4901 bool fast, longmode;
4902 int cs_db, cs_l;
4903
4904 /*
4905 * hypercall generates UD from non zero cpl and real mode
4906 * per HYPER-V spec
4907 */
3eeb3288 4908 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
55cd8e5a
GN		 4909 kvm_queue_exception(vcpu, UD_VECTOR);
4910 return 0;
4911 }
4912
4913 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4914 longmode = is_long_mode(vcpu) && cs_l == 1;
4915
4916 if (!longmode) {
ccd46936
GN		 4917 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
4918 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
4919 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
4920 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
4921 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
4922 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
55cd8e5a
GN		 4923 }
4924#ifdef CONFIG_X86_64
4925 else {
4926 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
4927 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
4928 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
4929 }
4930#endif
4931
4932 code = param & 0xffff;
4933 fast = (param >> 16) & 0x1;
4934 rep_cnt = (param >> 32) & 0xfff;
4935 rep_idx = (param >> 48) & 0xfff;
4936
4937 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
4938
c25bc163
GN		 4939 switch (code) {
4940 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
4941 kvm_vcpu_on_spin(vcpu);
4942 break;
4943 default:
4944 res = HV_STATUS_INVALID_HYPERCALL_CODE;
4945 break;
4946 }
55cd8e5a
GN		 4947
4948 ret = res | (((u64)rep_done & 0xfff) << 32);
4949 if (longmode) {
4950 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
4951 } else {
4952 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
4953 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
4954 }
4955
4956 return 1;
4957}
4958
8776e519
HB		 4959int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
4960{
4961 unsigned long nr, a0, a1, a2, a3, ret;
2f333bcb 4962 int r = 1;
8776e519 4963
55cd8e5a
GN		 4964 if (kvm_hv_hypercall_enabled(vcpu->kvm))
4965 return kvm_hv_hypercall(vcpu);
4966
5fdbf976
MT		 4967 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
4968 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
4969 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
4970 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
4971 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
8776e519 4972
229456fc 4973 trace_kvm_hypercall(nr, a0, a1, a2, a3);
2714d1d3 4974
8776e519
HB		 4975 if (!is_long_mode(vcpu)) {
4976 nr &= 0xFFFFFFFF;
4977 a0 &= 0xFFFFFFFF;
4978 a1 &= 0xFFFFFFFF;
4979 a2 &= 0xFFFFFFFF;
4980 a3 &= 0xFFFFFFFF;
4981 }
4982
07708c4a
JK		 4983 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
4984 ret = -KVM_EPERM;
4985 goto out;
4986 }
4987
8776e519 4988 switch (nr) {
b93463aa
AK		 4989 case KVM_HC_VAPIC_POLL_IRQ:
4990 ret = 0;
4991 break;
8776e519
HB		 4992 default:
4993 ret = -KVM_ENOSYS;
4994 break;
4995 }
07708c4a 4996out:
5fdbf976 4997 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
f11c3a8d 4998 ++vcpu->stat.hypercalls;
2f333bcb 4999 return r;
8776e519
HB		 5000}
5001EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
5002
d6aa1000 5003int emulator_fix_hypercall(struct x86_emulate_ctxt *ctxt)
8776e519 5004{
d6aa1000 5005 struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
8776e519 5006 char instruction[3];
5fdbf976 5007 unsigned long rip = kvm_rip_read(vcpu);
8776e519 5008
8776e519
HB		 5009 /*
5010 * Blow out the MMU to ensure that no other VCPU has an active mapping
5011 * to ensure that the updated hypercall appears atomically across all
5012 * VCPUs.
5013 */
5014 kvm_mmu_zap_all(vcpu->kvm);
5015
8776e519 5016 kvm_x86_ops->patch_hypercall(vcpu, instruction);
8776e519 5017
9d74191a 5018 return emulator_write_emulated(ctxt, rip, instruction, 3, NULL);
8776e519
HB		 5019}
5020
b6c7a5dc
HB		 5021/*
5022 * Check if userspace requested an interrupt window, and that the
5023 * interrupt window is open.
5024 *
5025 * No need to exit to userspace if we already have an interrupt queued.
5026 */
851ba692 5027static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
b6c7a5dc 5028{
8061823a 5029 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
851ba692 5030 vcpu->run->request_interrupt_window &&
5df56646 5031 kvm_arch_interrupt_allowed(vcpu));
b6c7a5dc
HB		 5032}
5033
851ba692 5034static void post_kvm_run_save(struct kvm_vcpu *vcpu)
b6c7a5dc 5035{
851ba692
AK		 5036 struct kvm_run *kvm_run = vcpu->run;
5037
91586a3b 5038 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2d3ad1f4 5039 kvm_run->cr8 = kvm_get_cr8(vcpu);
b6c7a5dc 5040 kvm_run->apic_base = kvm_get_apic_base(vcpu);
4531220b 5041 if (irqchip_in_kernel(vcpu->kvm))
b6c7a5dc 5042 kvm_run->ready_for_interrupt_injection = 1;
4531220b 5043 else
b6c7a5dc 5044 kvm_run->ready_for_interrupt_injection =
fa9726b0
GN		 5045 kvm_arch_interrupt_allowed(vcpu) &&
5046 !kvm_cpu_has_interrupt(vcpu) &&
5047 !kvm_event_needs_reinjection(vcpu);
b6c7a5dc
HB		 5048}
5049
b93463aa
AK		 5050static void vapic_enter(struct kvm_vcpu *vcpu)
5051{
5052 struct kvm_lapic *apic = vcpu->arch.apic;
5053 struct page *page;
5054
5055 if (!apic || !apic->vapic_addr)
5056 return;
5057
5058 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
72dc67a6
IE		 5059
5060 vcpu->arch.apic->vapic_page = page;
b93463aa
AK		 5061}
5062
5063static void vapic_exit(struct kvm_vcpu *vcpu)
5064{
5065 struct kvm_lapic *apic = vcpu->arch.apic;
f656ce01 5066 int idx;
b93463aa
AK		 5067
5068 if (!apic || !apic->vapic_addr)
5069 return;
5070
f656ce01 5071 idx = srcu_read_lock(&vcpu->kvm->srcu);
b93463aa
AK		 5072 kvm_release_page_dirty(apic->vapic_page);
5073 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
f656ce01 5074 srcu_read_unlock(&vcpu->kvm->srcu, idx);
b93463aa
AK		 5075}
5076
95ba8273
GN		 5077static void update_cr8_intercept(struct kvm_vcpu *vcpu)
5078{
5079 int max_irr, tpr;
5080
5081 if (!kvm_x86_ops->update_cr8_intercept)
5082 return;
5083
88c808fd
AK		 5084 if (!vcpu->arch.apic)
5085 return;
5086
8db3baa2
GN		 5087 if (!vcpu->arch.apic->vapic_addr)
5088 max_irr = kvm_lapic_find_highest_irr(vcpu);
5089 else
5090 max_irr = -1;
95ba8273
GN		 5091
5092 if (max_irr != -1)
5093 max_irr >>= 4;
5094
5095 tpr = kvm_lapic_get_cr8(vcpu);
5096
5097 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
5098}
5099
851ba692 5100static void inject_pending_event(struct kvm_vcpu *vcpu)
95ba8273
GN		 5101{
5102 /* try to reinject previous events if any */
b59bb7bd 5103 if (vcpu->arch.exception.pending) {
5c1c85d0
AK		 5104 trace_kvm_inj_exception(vcpu->arch.exception.nr,
5105 vcpu->arch.exception.has_error_code,
5106 vcpu->arch.exception.error_code);
b59bb7bd
GN		 5107 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
5108 vcpu->arch.exception.has_error_code,
ce7ddec4
JR		 5109 vcpu->arch.exception.error_code,
5110 vcpu->arch.exception.reinject);
b59bb7bd
GN		 5111 return;
5112 }
5113
95ba8273
GN		 5114 if (vcpu->arch.nmi_injected) {
5115 kvm_x86_ops->set_nmi(vcpu);
5116 return;
5117 }
5118
5119 if (vcpu->arch.interrupt.pending) {
66fd3f7f 5120 kvm_x86_ops->set_irq(vcpu);
95ba8273
GN		 5121 return;
5122 }
5123
5124 /* try to inject new event if pending */
5125 if (vcpu->arch.nmi_pending) {
5126 if (kvm_x86_ops->nmi_allowed(vcpu)) {
7460fb4a 5127 --vcpu->arch.nmi_pending;
95ba8273
GN		 5128 vcpu->arch.nmi_injected = true;
5129 kvm_x86_ops->set_nmi(vcpu);
5130 }
5131 } else if (kvm_cpu_has_interrupt(vcpu)) {
5132 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
66fd3f7f
GN		 5133 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
5134 false);
5135 kvm_x86_ops->set_irq(vcpu);
95ba8273
GN		 5136 }
5137 }
5138}
5139
2acf923e
DC		 5140static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu)
5141{
5142 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) &&
5143 !vcpu->guest_xcr0_loaded) {
5144 /* kvm_set_xcr() also depends on this */
5145 xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0);
5146 vcpu->guest_xcr0_loaded = 1;
5147 }
5148}
5149
5150static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu)
5151{
5152 if (vcpu->guest_xcr0_loaded) {
5153 if (vcpu->arch.xcr0 != host_xcr0)
5154 xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0);
5155 vcpu->guest_xcr0_loaded = 0;
5156 }
5157}
5158
7460fb4a
AK		 5159static void process_nmi(struct kvm_vcpu *vcpu)
5160{
5161 unsigned limit = 2;
5162
5163 /*
5164 * x86 is limited to one NMI running, and one NMI pending after it.
5165 * If an NMI is already in progress, limit further NMIs to just one.
5166 * Otherwise, allow two (and we'll inject the first one immediately).
5167 */
5168 if (kvm_x86_ops->get_nmi_mask(vcpu) || vcpu->arch.nmi_injected)
5169 limit = 1;
5170
5171 vcpu->arch.nmi_pending += atomic_xchg(&vcpu->arch.nmi_queued, 0);
5172 vcpu->arch.nmi_pending = min(vcpu->arch.nmi_pending, limit);
5173 kvm_make_request(KVM_REQ_EVENT, vcpu);
5174}
5175
851ba692 5176static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
b6c7a5dc
HB		 5177{
5178 int r;
6a8b1d13 5179 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
851ba692 5180 vcpu->run->request_interrupt_window;
d6185f20 5181 bool req_immediate_exit = 0;
b6c7a5dc 5182
3e007509 5183 if (vcpu->requests) {
a8eeb04a 5184 if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu))
2e53d63a 5185 kvm_mmu_unload(vcpu);
a8eeb04a 5186 if (kvm_check_request(KVM_REQ_MIGRATE_TIMER, vcpu))
2f599714 5187 __kvm_migrate_timers(vcpu);
34c238a1
ZA		 5188 if (kvm_check_request(KVM_REQ_CLOCK_UPDATE, vcpu)) {
5189 r = kvm_guest_time_update(vcpu);
8cfdc000
ZA		 5190 if (unlikely(r))
5191 goto out;
5192 }
a8eeb04a 5193 if (kvm_check_request(KVM_REQ_MMU_SYNC, vcpu))
4731d4c7 5194 kvm_mmu_sync_roots(vcpu);
a8eeb04a 5195 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
d4acf7e7 5196 kvm_x86_ops->tlb_flush(vcpu);
a8eeb04a 5197 if (kvm_check_request(KVM_REQ_REPORT_TPR_ACCESS, vcpu)) {
851ba692 5198 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
b93463aa
AK		 5199 r = 0;
5200 goto out;
5201 }
a8eeb04a 5202 if (kvm_check_request(KVM_REQ_TRIPLE_FAULT, vcpu)) {
851ba692 5203 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
71c4dfaf
JR		 5204 r = 0;
5205 goto out;
5206 }
a8eeb04a 5207 if (kvm_check_request(KVM_REQ_DEACTIVATE_FPU, vcpu)) {
02daab21
AK		 5208 vcpu->fpu_active = 0;
5209 kvm_x86_ops->fpu_deactivate(vcpu);
5210 }
af585b92
GN		 5211 if (kvm_check_request(KVM_REQ_APF_HALT, vcpu)) {
5212 /* Page is swapped out. Do synthetic halt */
5213 vcpu->arch.apf.halted = true;
5214 r = 1;
5215 goto out;
5216 }
c9aaa895
GC		 5217 if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu))
5218 record_steal_time(vcpu);
7460fb4a
AK		 5219 if (kvm_check_request(KVM_REQ_NMI, vcpu))
5220 process_nmi(vcpu);
d6185f20
NHE		 5221 req_immediate_exit =
5222 kvm_check_request(KVM_REQ_IMMEDIATE_EXIT, vcpu);
f5132b01
GN		 5223 if (kvm_check_request(KVM_REQ_PMU, vcpu))
5224 kvm_handle_pmu_event(vcpu);
5225 if (kvm_check_request(KVM_REQ_PMI, vcpu))
5226 kvm_deliver_pmi(vcpu);
2f52d58c 5227 }
b93463aa 5228
3e007509
AK		 5229 r = kvm_mmu_reload(vcpu);
5230 if (unlikely(r))
5231 goto out;
5232
b463a6f7
AK		 5233 if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) {
5234 inject_pending_event(vcpu);
5235
5236 /* enable NMI/IRQ window open exits if needed */
7460fb4a 5237 if (vcpu->arch.nmi_pending)
b463a6f7
AK		 5238 kvm_x86_ops->enable_nmi_window(vcpu);
5239 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
5240 kvm_x86_ops->enable_irq_window(vcpu);
5241
5242 if (kvm_lapic_enabled(vcpu)) {
5243 update_cr8_intercept(vcpu);
5244 kvm_lapic_sync_to_vapic(vcpu);
5245 }
5246 }
5247
b6c7a5dc
HB		 5248 preempt_disable();
5249
5250 kvm_x86_ops->prepare_guest_switch(vcpu);
2608d7a1
AK		 5251 if (vcpu->fpu_active)
5252 kvm_load_guest_fpu(vcpu);
2acf923e 5253 kvm_load_guest_xcr0(vcpu);
b6c7a5dc 5254
6b7e2d09
XG		 5255 vcpu->mode = IN_GUEST_MODE;
5256
5257 /* We should set ->mode before check ->requests,
5258 * see the comment in make_all_cpus_request.
5259 */
5260 smp_mb();
b6c7a5dc 5261
d94e1dc9 5262 local_irq_disable();
32f88400 5263
6b7e2d09 5264 if (vcpu->mode == EXITING_GUEST_MODE || vcpu->requests
d94e1dc9 5265 || need_resched() || signal_pending(current)) {
6b7e2d09 5266 vcpu->mode = OUTSIDE_GUEST_MODE;
d94e1dc9 5267 smp_wmb();
6c142801
AK		 5268 local_irq_enable();
5269 preempt_enable();
b463a6f7 5270 kvm_x86_ops->cancel_injection(vcpu);
6c142801
AK		 5271 r = 1;
5272 goto out;
5273 }
5274
f656ce01 5275 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3200f405 5276
d6185f20
NHE		 5277 if (req_immediate_exit)
5278 smp_send_reschedule(vcpu->cpu);
5279
b6c7a5dc
HB		 5280 kvm_guest_enter();
5281
42dbaa5a 5282 if (unlikely(vcpu->arch.switch_db_regs)) {
42dbaa5a
JK		 5283 set_debugreg(0, 7);
5284 set_debugreg(vcpu->arch.eff_db[0], 0);
5285 set_debugreg(vcpu->arch.eff_db[1], 1);
5286 set_debugreg(vcpu->arch.eff_db[2], 2);
5287 set_debugreg(vcpu->arch.eff_db[3], 3);
5288 }
b6c7a5dc 5289
229456fc 5290 trace_kvm_entry(vcpu->vcpu_id);
851ba692 5291 kvm_x86_ops->run(vcpu);
b6c7a5dc 5292
24f1e32c
FW		 5293 /*
5294 * If the guest has used debug registers, at least dr7
5295 * will be disabled while returning to the host.
5296 * If we don't have active breakpoints in the host, we don't
5297 * care about the messed up debug address registers. But if
5298 * we have some of them active, restore the old state.
5299 */
59d8eb53 5300 if (hw_breakpoint_active())
24f1e32c 5301 hw_breakpoint_restore();
42dbaa5a 5302
d5c1785d 5303 vcpu->arch.last_guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu);
1d5f066e 5304
6b7e2d09 5305 vcpu->mode = OUTSIDE_GUEST_MODE;
d94e1dc9 5306 smp_wmb();
b6c7a5dc
HB		 5307 local_irq_enable();
5308
5309 ++vcpu->stat.exits;
5310
5311 /*
5312 * We must have an instruction between local_irq_enable() and
5313 * kvm_guest_exit(), so the timer interrupt isn't delayed by
5314 * the interrupt shadow. The stat.exits increment will do nicely.
5315 * But we need to prevent reordering, hence this barrier():
5316 */
5317 barrier();
5318
5319 kvm_guest_exit();
5320
5321 preempt_enable();
5322
f656ce01 5323 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3200f405 5324
b6c7a5dc
HB		 5325 /*
5326 * Profile KVM exit RIPs:
5327 */
5328 if (unlikely(prof_on == KVM_PROFILING)) {
5fdbf976
MT		 5329 unsigned long rip = kvm_rip_read(vcpu);
5330 profile_hit(KVM_PROFILING, (void *)rip);
b6c7a5dc
HB		 5331 }
5332
cc578287
ZA		 5333 if (unlikely(vcpu->arch.tsc_always_catchup))
5334 kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
298101da 5335
b93463aa
AK		 5336 kvm_lapic_sync_from_vapic(vcpu);
5337
851ba692 5338 r = kvm_x86_ops->handle_exit(vcpu);
d7690175
MT		 5339out:
5340 return r;
5341}
b6c7a5dc 5342
09cec754 5343
851ba692 5344static int __vcpu_run(struct kvm_vcpu *vcpu)
d7690175
MT		 5345{
5346 int r;
f656ce01 5347 struct kvm *kvm = vcpu->kvm;
d7690175
MT		 5348
5349 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
1b10bf31
JK		 5350 pr_debug("vcpu %d received sipi with vector # %x\n",
5351 vcpu->vcpu_id, vcpu->arch.sipi_vector);
d7690175 5352 kvm_lapic_reset(vcpu);
5f179287 5353 r = kvm_arch_vcpu_reset(vcpu);
d7690175
MT		 5354 if (r)
5355 return r;
5356 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
b6c7a5dc
HB		 5357 }
5358
f656ce01 5359 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
d7690175
MT		 5360 vapic_enter(vcpu);
5361
5362 r = 1;
5363 while (r > 0) {
af585b92
GN		 5364 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
5365 !vcpu->arch.apf.halted)
851ba692 5366 r = vcpu_enter_guest(vcpu);
d7690175 5367 else {
f656ce01 5368 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
d7690175 5369 kvm_vcpu_block(vcpu);
f656ce01 5370 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
a8eeb04a 5371 if (kvm_check_request(KVM_REQ_UNHALT, vcpu))
09cec754
GN		 5372 {
5373 switch(vcpu->arch.mp_state) {
5374 case KVM_MP_STATE_HALTED:
d7690175 5375 vcpu->arch.mp_state =
09cec754
GN		 5376 KVM_MP_STATE_RUNNABLE;
5377 case KVM_MP_STATE_RUNNABLE:
af585b92 5378 vcpu->arch.apf.halted = false;
09cec754
GN		 5379 break;
5380 case KVM_MP_STATE_SIPI_RECEIVED:
5381 default:
5382 r = -EINTR;
5383 break;
5384 }
5385 }
d7690175
MT		 5386 }
5387
09cec754
GN		 5388 if (r <= 0)
5389 break;
5390
5391 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
5392 if (kvm_cpu_has_pending_timer(vcpu))
5393 kvm_inject_pending_timer_irqs(vcpu);
5394
851ba692 5395 if (dm_request_for_irq_injection(vcpu)) {
09cec754 5396 r = -EINTR;
851ba692 5397 vcpu->run->exit_reason = KVM_EXIT_INTR;
09cec754
GN		 5398 ++vcpu->stat.request_irq_exits;
5399 }
af585b92
GN		 5400
5401 kvm_check_async_pf_completion(vcpu);
5402
09cec754
GN		 5403 if (signal_pending(current)) {
5404 r = -EINTR;
851ba692 5405 vcpu->run->exit_reason = KVM_EXIT_INTR;
09cec754
GN		 5406 ++vcpu->stat.signal_exits;
5407 }
5408 if (need_resched()) {
f656ce01 5409 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
09cec754 5410 kvm_resched(vcpu);
f656ce01 5411 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
d7690175 5412 }
b6c7a5dc
HB		 5413 }
5414
f656ce01 5415 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
b6c7a5dc 5416
b93463aa
AK		 5417 vapic_exit(vcpu);
5418
b6c7a5dc
HB		 5419 return r;
5420}
5421
5287f194
AK		 5422static int complete_mmio(struct kvm_vcpu *vcpu)
5423{
5424 struct kvm_run *run = vcpu->run;
5425 int r;
5426
5427 if (!(vcpu->arch.pio.count || vcpu->mmio_needed))
5428 return 1;
5429
5430 if (vcpu->mmio_needed) {
5287f194 5431 vcpu->mmio_needed = 0;
cef4dea0 5432 if (!vcpu->mmio_is_write)
0004c7c2
GN		 5433 memcpy(vcpu->mmio_data + vcpu->mmio_index,
5434 run->mmio.data, 8);
cef4dea0
AK		 5435 vcpu->mmio_index += 8;
5436 if (vcpu->mmio_index < vcpu->mmio_size) {
5437 run->exit_reason = KVM_EXIT_MMIO;
5438 run->mmio.phys_addr = vcpu->mmio_phys_addr + vcpu->mmio_index;
5439 memcpy(run->mmio.data, vcpu->mmio_data + vcpu->mmio_index, 8);
5440 run->mmio.len = min(vcpu->mmio_size - vcpu->mmio_index, 8);
5441 run->mmio.is_write = vcpu->mmio_is_write;
5442 vcpu->mmio_needed = 1;
5443 return 0;
5444 }
5445 if (vcpu->mmio_is_write)
5446 return 1;
5447 vcpu->mmio_read_completed = 1;
5287f194
AK		 5448 }
5449 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
5450 r = emulate_instruction(vcpu, EMULTYPE_NO_DECODE);
5451 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
5452 if (r != EMULATE_DONE)
5453 return 0;
5454 return 1;
5455}
5456
b6c7a5dc
HB		 5457int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
5458{
5459 int r;
5460 sigset_t sigsaved;
5461
e5c30142
AK		 5462 if (!tsk_used_math(current) && init_fpu(current))
5463 return -ENOMEM;
5464
ac9f6dc0
AK		 5465 if (vcpu->sigset_active)
5466 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
5467
a4535290 5468 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
b6c7a5dc 5469 kvm_vcpu_block(vcpu);
d7690175 5470 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
ac9f6dc0
AK		 5471 r = -EAGAIN;
5472 goto out;
b6c7a5dc
HB		 5473 }
5474
b6c7a5dc 5475 /* re-sync apic's tpr */
eea1cff9
AP		 5476 if (!irqchip_in_kernel(vcpu->kvm)) {
5477 if (kvm_set_cr8(vcpu, kvm_run->cr8) != 0) {
5478 r = -EINVAL;
5479 goto out;
5480 }
5481 }
b6c7a5dc 5482
5287f194
AK		 5483 r = complete_mmio(vcpu);
5484 if (r <= 0)
5485 goto out;
5486
851ba692 5487 r = __vcpu_run(vcpu);
b6c7a5dc
HB		 5488
5489out:
f1d86e46 5490 post_kvm_run_save(vcpu);
b6c7a5dc
HB		 5491 if (vcpu->sigset_active)
5492 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
5493
b6c7a5dc
HB		 5494 return r;
5495}
5496
5497int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5498{
7ae441ea
GN		 5499 if (vcpu->arch.emulate_regs_need_sync_to_vcpu) {
5500 /*
5501 * We are here if userspace calls get_regs() in the middle of
5502 * instruction emulation. Registers state needs to be copied
5503 * back from emulation context to vcpu. Usrapace shouldn't do
5504 * that usually, but some bad designed PV devices (vmware
5505 * backdoor interface) need this to work
5506 */
9dac77fa
AK		 5507 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
5508 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
7ae441ea
GN		 5509 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
5510 }
5fdbf976
MT		 5511 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
5512 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
5513 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
5514 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
5515 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
5516 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
5517 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
5518 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
b6c7a5dc 5519#ifdef CONFIG_X86_64
5fdbf976
MT		 5520 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
5521 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
5522 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
5523 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
5524 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
5525 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
5526 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
5527 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
b6c7a5dc
HB		 5528#endif
5529
5fdbf976 5530 regs->rip = kvm_rip_read(vcpu);
91586a3b 5531 regs->rflags = kvm_get_rflags(vcpu);
b6c7a5dc 5532
b6c7a5dc
HB		 5533 return 0;
5534}
5535
5536int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5537{
7ae441ea
GN		 5538 vcpu->arch.emulate_regs_need_sync_from_vcpu = true;
5539 vcpu->arch.emulate_regs_need_sync_to_vcpu = false;
5540
5fdbf976
MT		 5541 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
5542 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
5543 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
5544 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
5545 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
5546 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
5547 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
5548 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
b6c7a5dc 5549#ifdef CONFIG_X86_64
5fdbf976
MT		 5550 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
5551 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
5552 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
5553 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
5554 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
5555 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
5556 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
5557 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
b6c7a5dc
HB		 5558#endif
5559
5fdbf976 5560 kvm_rip_write(vcpu, regs->rip);
91586a3b 5561 kvm_set_rflags(vcpu, regs->rflags);
b6c7a5dc 5562
b4f14abd
JK		 5563 vcpu->arch.exception.pending = false;
5564
3842d135
AK		 5565 kvm_make_request(KVM_REQ_EVENT, vcpu);
5566
b6c7a5dc
HB		 5567 return 0;
5568}
5569
b6c7a5dc
HB		 5570void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
5571{
5572 struct kvm_segment cs;
5573
3e6e0aab 5574 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
b6c7a5dc
HB		 5575 *db = cs.db;
5576 *l = cs.l;
5577}
5578EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
5579
5580int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
5581 struct kvm_sregs *sregs)
5582{
89a27f4d 5583 struct desc_ptr dt;
b6c7a5dc 5584
3e6e0aab
GT		 5585 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5586 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5587 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5588 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5589 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5590 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
b6c7a5dc 5591
3e6e0aab
GT		 5592 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5593 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
b6c7a5dc
HB		 5594
5595 kvm_x86_ops->get_idt(vcpu, &dt);
89a27f4d
GN		 5596 sregs->idt.limit = dt.size;
5597 sregs->idt.base = dt.address;
b6c7a5dc 5598 kvm_x86_ops->get_gdt(vcpu, &dt);
89a27f4d
GN		 5599 sregs->gdt.limit = dt.size;
5600 sregs->gdt.base = dt.address;
b6c7a5dc 5601
4d4ec087 5602 sregs->cr0 = kvm_read_cr0(vcpu);
ad312c7c 5603 sregs->cr2 = vcpu->arch.cr2;
9f8fe504 5604 sregs->cr3 = kvm_read_cr3(vcpu);
fc78f519 5605 sregs->cr4 = kvm_read_cr4(vcpu);
2d3ad1f4 5606 sregs->cr8 = kvm_get_cr8(vcpu);
f6801dff 5607 sregs->efer = vcpu->arch.efer;
b6c7a5dc
HB		 5608 sregs->apic_base = kvm_get_apic_base(vcpu);
5609
923c61bb 5610 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
b6c7a5dc 5611
36752c9b 5612 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
14d0bc1f
GN		 5613 set_bit(vcpu->arch.interrupt.nr,
5614 (unsigned long *)sregs->interrupt_bitmap);
16d7a191 5615
b6c7a5dc
HB		 5616 return 0;
5617}
5618
62d9f0db
MT		 5619int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
5620 struct kvm_mp_state *mp_state)
5621{
62d9f0db 5622 mp_state->mp_state = vcpu->arch.mp_state;
62d9f0db
MT		 5623 return 0;
5624}
5625
5626int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
5627 struct kvm_mp_state *mp_state)
5628{
62d9f0db 5629 vcpu->arch.mp_state = mp_state->mp_state;
3842d135 5630 kvm_make_request(KVM_REQ_EVENT, vcpu);
62d9f0db
MT		 5631 return 0;
5632}
5633
e269fb21
JK		 5634int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
5635 bool has_error_code, u32 error_code)
b6c7a5dc 5636{
9d74191a 5637 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
8ec4722d 5638 int ret;
e01c2426 5639
8ec4722d 5640 init_emulate_ctxt(vcpu);
c697518a 5641
9d74191a
TY		 5642 ret = emulator_task_switch(ctxt, tss_selector, reason,
5643 has_error_code, error_code);
c697518a 5644
c697518a 5645 if (ret)
19d04437 5646 return EMULATE_FAIL;
37817f29 5647
9dac77fa 5648 memcpy(vcpu->arch.regs, ctxt->regs, sizeof ctxt->regs);
9d74191a
TY		 5649 kvm_rip_write(vcpu, ctxt->eip);
5650 kvm_set_rflags(vcpu, ctxt->eflags);
3842d135 5651 kvm_make_request(KVM_REQ_EVENT, vcpu);
19d04437 5652 return EMULATE_DONE;
37817f29
IE		 5653}
5654EXPORT_SYMBOL_GPL(kvm_task_switch);
5655
b6c7a5dc
HB		 5656int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
5657 struct kvm_sregs *sregs)
5658{
5659 int mmu_reset_needed = 0;
63f42e02 5660 int pending_vec, max_bits, idx;
89a27f4d 5661 struct desc_ptr dt;
b6c7a5dc 5662
89a27f4d
GN		 5663 dt.size = sregs->idt.limit;
5664 dt.address = sregs->idt.base;
b6c7a5dc 5665 kvm_x86_ops->set_idt(vcpu, &dt);
89a27f4d
GN		 5666 dt.size = sregs->gdt.limit;
5667 dt.address = sregs->gdt.base;
b6c7a5dc
HB		 5668 kvm_x86_ops->set_gdt(vcpu, &dt);
5669
ad312c7c 5670 vcpu->arch.cr2 = sregs->cr2;
9f8fe504 5671 mmu_reset_needed |= kvm_read_cr3(vcpu) != sregs->cr3;
dc7e795e 5672 vcpu->arch.cr3 = sregs->cr3;
aff48baa 5673 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
b6c7a5dc 5674
2d3ad1f4 5675 kvm_set_cr8(vcpu, sregs->cr8);
b6c7a5dc 5676
f6801dff 5677 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
b6c7a5dc 5678 kvm_x86_ops->set_efer(vcpu, sregs->efer);
b6c7a5dc
HB		 5679 kvm_set_apic_base(vcpu, sregs->apic_base);
5680
4d4ec087 5681 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
b6c7a5dc 5682 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
d7306163 5683 vcpu->arch.cr0 = sregs->cr0;
b6c7a5dc 5684
fc78f519 5685 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
b6c7a5dc 5686 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
3ea3aa8c 5687 if (sregs->cr4 & X86_CR4_OSXSAVE)
00b27a3e 5688 kvm_update_cpuid(vcpu);
63f42e02
XG		 5689
5690 idx = srcu_read_lock(&vcpu->kvm->srcu);
7c93be44 5691 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
9f8fe504 5692 load_pdptrs(vcpu, vcpu->arch.walk_mmu, kvm_read_cr3(vcpu));
7c93be44
MT		 5693 mmu_reset_needed = 1;
5694 }
63f42e02 5695 srcu_read_unlock(&vcpu->kvm->srcu, idx);
b6c7a5dc
HB		 5696
5697 if (mmu_reset_needed)
5698 kvm_mmu_reset_context(vcpu);
5699
923c61bb
GN		 5700 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
5701 pending_vec = find_first_bit(
5702 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
5703 if (pending_vec < max_bits) {
66fd3f7f 5704 kvm_queue_interrupt(vcpu, pending_vec, false);
923c61bb 5705 pr_debug("Set back pending irq %d\n", pending_vec);
b6c7a5dc
HB		 5706 }
5707
3e6e0aab
GT		 5708 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5709 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5710 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5711 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5712 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5713 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
b6c7a5dc 5714
3e6e0aab
GT		 5715 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5716 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
b6c7a5dc 5717
5f0269f5
ME		 5718 update_cr8_intercept(vcpu);
5719
9c3e4aab 5720 /* Older userspace won't unhalt the vcpu on reset. */
c5af89b6 5721 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
9c3e4aab 5722 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
3eeb3288 5723 !is_protmode(vcpu))
9c3e4aab
MT		 5724 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5725
3842d135
AK		 5726 kvm_make_request(KVM_REQ_EVENT, vcpu);
5727
b6c7a5dc
HB		 5728 return 0;
5729}
5730
d0bfb940
JK		 5731int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
5732 struct kvm_guest_debug *dbg)
b6c7a5dc 5733{
355be0b9 5734 unsigned long rflags;
ae675ef0 5735 int i, r;
b6c7a5dc 5736
4f926bf2
JK		 5737 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
5738 r = -EBUSY;
5739 if (vcpu->arch.exception.pending)
2122ff5e 5740 goto out;
4f926bf2
JK		 5741 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
5742 kvm_queue_exception(vcpu, DB_VECTOR);
5743 else
5744 kvm_queue_exception(vcpu, BP_VECTOR);
5745 }
5746
91586a3b
JK		 5747 /*
5748 * Read rflags as long as potentially injected trace flags are still
5749 * filtered out.
5750 */
5751 rflags = kvm_get_rflags(vcpu);
355be0b9
JK		 5752
5753 vcpu->guest_debug = dbg->control;
5754 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
5755 vcpu->guest_debug = 0;
5756
5757 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
ae675ef0
JK		 5758 for (i = 0; i < KVM_NR_DB_REGS; ++i)
5759 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
5760 vcpu->arch.switch_db_regs =
5761 (dbg->arch.debugreg[7] & DR7_BP_EN_MASK);
5762 } else {
5763 for (i = 0; i < KVM_NR_DB_REGS; i++)
5764 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
5765 vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
5766 }
5767
f92653ee
JK		 5768 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5769 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
5770 get_segment_base(vcpu, VCPU_SREG_CS);
94fe45da 5771
91586a3b
JK		 5772 /*
5773 * Trigger an rflags update that will inject or remove the trace
5774 * flags.
5775 */
5776 kvm_set_rflags(vcpu, rflags);
b6c7a5dc 5777
355be0b9 5778 kvm_x86_ops->set_guest_debug(vcpu, dbg);
b6c7a5dc 5779
4f926bf2 5780 r = 0;
d0bfb940 5781
2122ff5e 5782out:
b6c7a5dc
HB		 5783
5784 return r;
5785}
5786
8b006791
ZX		 5787/*
5788 * Translate a guest virtual address to a guest physical address.
5789 */
5790int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
5791 struct kvm_translation *tr)
5792{
5793 unsigned long vaddr = tr->linear_address;
5794 gpa_t gpa;
f656ce01 5795 int idx;
8b006791 5796
f656ce01 5797 idx = srcu_read_lock(&vcpu->kvm->srcu);
1871c602 5798 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
f656ce01 5799 srcu_read_unlock(&vcpu->kvm->srcu, idx);
8b006791
ZX		 5800 tr->physical_address = gpa;
5801 tr->valid = gpa != UNMAPPED_GVA;
5802 tr->writeable = 1;
5803 tr->usermode = 0;
8b006791
ZX		 5804
5805 return 0;
5806}
5807
d0752060
HB		 5808int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5809{
98918833
SY		 5810 struct i387_fxsave_struct *fxsave =
5811 &vcpu->arch.guest_fpu.state->fxsave;
d0752060 5812
d0752060
HB		 5813 memcpy(fpu->fpr, fxsave->st_space, 128);
5814 fpu->fcw = fxsave->cwd;
5815 fpu->fsw = fxsave->swd;
5816 fpu->ftwx = fxsave->twd;
5817 fpu->last_opcode = fxsave->fop;
5818 fpu->last_ip = fxsave->rip;
5819 fpu->last_dp = fxsave->rdp;
5820 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
5821
d0752060
HB		 5822 return 0;
5823}
5824
5825int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5826{
98918833
SY		 5827 struct i387_fxsave_struct *fxsave =
5828 &vcpu->arch.guest_fpu.state->fxsave;
d0752060 5829
d0752060
HB		 5830 memcpy(fxsave->st_space, fpu->fpr, 128);
5831 fxsave->cwd = fpu->fcw;
5832 fxsave->swd = fpu->fsw;
5833 fxsave->twd = fpu->ftwx;
5834 fxsave->fop = fpu->last_opcode;
5835 fxsave->rip = fpu->last_ip;
5836 fxsave->rdp = fpu->last_dp;
5837 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
5838
d0752060
HB		 5839 return 0;
5840}
5841
10ab25cd 5842int fx_init(struct kvm_vcpu *vcpu)
d0752060 5843{
10ab25cd
JK		 5844 int err;
5845
5846 err = fpu_alloc(&vcpu->arch.guest_fpu);
5847 if (err)
5848 return err;
5849
98918833 5850 fpu_finit(&vcpu->arch.guest_fpu);
d0752060 5851
2acf923e
DC		 5852 /*
5853 * Ensure guest xcr0 is valid for loading
5854 */
5855 vcpu->arch.xcr0 = XSTATE_FP;
5856
ad312c7c 5857 vcpu->arch.cr0 |= X86_CR0_ET;
10ab25cd
JK		 5858
5859 return 0;
d0752060
HB		 5860}
5861EXPORT_SYMBOL_GPL(fx_init);
5862
98918833
SY		 5863static void fx_free(struct kvm_vcpu *vcpu)
5864{
5865 fpu_free(&vcpu->arch.guest_fpu);
5866}
5867
d0752060
HB		 5868void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
5869{
2608d7a1 5870 if (vcpu->guest_fpu_loaded)
d0752060
HB		 5871 return;
5872
2acf923e
DC		 5873 /*
5874 * Restore all possible states in the guest,
5875 * and assume host would use all available bits.
5876 * Guest xcr0 would be loaded later.
5877 */
5878 kvm_put_guest_xcr0(vcpu);
d0752060 5879 vcpu->guest_fpu_loaded = 1;
7cf30855 5880 unlazy_fpu(current);
98918833 5881 fpu_restore_checking(&vcpu->arch.guest_fpu);
0c04851c 5882 trace_kvm_fpu(1);
d0752060 5883}
d0752060
HB		 5884
5885void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
5886{
2acf923e
DC		 5887 kvm_put_guest_xcr0(vcpu);
5888
d0752060
HB		 5889 if (!vcpu->guest_fpu_loaded)
5890 return;
5891
5892 vcpu->guest_fpu_loaded = 0;
98918833 5893 fpu_save_init(&vcpu->arch.guest_fpu);
f096ed85 5894 ++vcpu->stat.fpu_reload;
a8eeb04a 5895 kvm_make_request(KVM_REQ_DEACTIVATE_FPU, vcpu);
0c04851c 5896 trace_kvm_fpu(0);
d0752060 5897}
e9b11c17
ZX		 5898
5899void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
5900{
12f9a48f 5901 kvmclock_reset(vcpu);
7f1ea208 5902
f5f48ee1 5903 free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
98918833 5904 fx_free(vcpu);
e9b11c17
ZX		 5905 kvm_x86_ops->vcpu_free(vcpu);
5906}
5907
5908struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
5909 unsigned int id)
5910{
6755bae8
ZA		 5911 if (check_tsc_unstable() && atomic_read(&kvm->online_vcpus) != 0)
5912 printk_once(KERN_WARNING
5913 "kvm: SMP vm created on host with unstable TSC; "
5914 "guest TSC will not be reliable\n");
26e5215f
AK		 5915 return kvm_x86_ops->vcpu_create(kvm, id);
5916}
e9b11c17 5917
26e5215f
AK		 5918int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
5919{
5920 int r;
e9b11c17 5921
0bed3b56 5922 vcpu->arch.mtrr_state.have_fixed = 1;
e9b11c17
ZX		 5923 vcpu_load(vcpu);
5924 r = kvm_arch_vcpu_reset(vcpu);
5925 if (r == 0)
5926 r = kvm_mmu_setup(vcpu);
5927 vcpu_put(vcpu);
e9b11c17 5928
26e5215f 5929 return r;
e9b11c17
ZX		 5930}
5931
d40ccc62 5932void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
e9b11c17 5933{
344d9588
GN		 5934 vcpu->arch.apf.msr_val = 0;
5935
e9b11c17
ZX		 5936 vcpu_load(vcpu);
5937 kvm_mmu_unload(vcpu);
5938 vcpu_put(vcpu);
5939
98918833 5940 fx_free(vcpu);
e9b11c17
ZX		 5941 kvm_x86_ops->vcpu_free(vcpu);
5942}
5943
5944int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
5945{
7460fb4a
AK		 5946 atomic_set(&vcpu->arch.nmi_queued, 0);
5947 vcpu->arch.nmi_pending = 0;
448fa4a9
JK		 5948 vcpu->arch.nmi_injected = false;
5949
42dbaa5a
JK		 5950 vcpu->arch.switch_db_regs = 0;
5951 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
5952 vcpu->arch.dr6 = DR6_FIXED_1;
5953 vcpu->arch.dr7 = DR7_FIXED_1;
5954
3842d135 5955 kvm_make_request(KVM_REQ_EVENT, vcpu);
344d9588 5956 vcpu->arch.apf.msr_val = 0;
c9aaa895 5957 vcpu->arch.st.msr_val = 0;
3842d135 5958
12f9a48f
GC		 5959 kvmclock_reset(vcpu);
5960
af585b92
GN		 5961 kvm_clear_async_pf_completion_queue(vcpu);
5962 kvm_async_pf_hash_reset(vcpu);
5963 vcpu->arch.apf.halted = false;
3842d135 5964
f5132b01
GN		 5965 kvm_pmu_reset(vcpu);
5966
e9b11c17
ZX		 5967 return kvm_x86_ops->vcpu_reset(vcpu);
5968}
5969
10474ae8 5970int kvm_arch_hardware_enable(void *garbage)
e9b11c17 5971{
ca84d1a2
ZA		 5972 struct kvm *kvm;
5973 struct kvm_vcpu *vcpu;
5974 int i;
0dd6a6ed
ZA		 5975 int ret;
5976 u64 local_tsc;
5977 u64 max_tsc = 0;
5978 bool stable, backwards_tsc = false;
18863bdd
AK		 5979
5980 kvm_shared_msr_cpu_online();
0dd6a6ed
ZA		 5981 ret = kvm_x86_ops->hardware_enable(garbage);
5982 if (ret != 0)
5983 return ret;
5984
5985 local_tsc = native_read_tsc();
5986 stable = !check_tsc_unstable();
5987 list_for_each_entry(kvm, &vm_list, vm_list) {
5988 kvm_for_each_vcpu(i, vcpu, kvm) {
5989 if (!stable && vcpu->cpu == smp_processor_id())
5990 set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests);
5991 if (stable && vcpu->arch.last_host_tsc > local_tsc) {
5992 backwards_tsc = true;
5993 if (vcpu->arch.last_host_tsc > max_tsc)
5994 max_tsc = vcpu->arch.last_host_tsc;
5995 }
5996 }
5997 }
5998
5999 /*
6000 * Sometimes, even reliable TSCs go backwards. This happens on
6001 * platforms that reset TSC during suspend or hibernate actions, but
6002 * maintain synchronization. We must compensate. Fortunately, we can
6003 * detect that condition here, which happens early in CPU bringup,
6004 * before any KVM threads can be running. Unfortunately, we can't
6005 * bring the TSCs fully up to date with real time, as we aren't yet far
6006 * enough into CPU bringup that we know how much real time has actually
6007 * elapsed; our helper function, get_kernel_ns() will be using boot
6008 * variables that haven't been updated yet.
6009 *
6010 * So we simply find the maximum observed TSC above, then record the
6011 * adjustment to TSC in each VCPU. When the VCPU later gets loaded,
6012 * the adjustment will be applied. Note that we accumulate
6013 * adjustments, in case multiple suspend cycles happen before some VCPU
6014 * gets a chance to run again. In the event that no KVM threads get a
6015 * chance to run, we will miss the entire elapsed period, as we'll have
6016 * reset last_host_tsc, so VCPUs will not have the TSC adjusted and may
6017 * loose cycle time. This isn't too big a deal, since the loss will be
6018 * uniform across all VCPUs (not to mention the scenario is extremely
6019 * unlikely). It is possible that a second hibernate recovery happens
6020 * much faster than a first, causing the observed TSC here to be
6021 * smaller; this would require additional padding adjustment, which is
6022 * why we set last_host_tsc to the local tsc observed here.
6023 *
6024 * N.B. - this code below runs only on platforms with reliable TSC,
6025 * as that is the only way backwards_tsc is set above. Also note
6026 * that this runs for ALL vcpus, which is not a bug; all VCPUs should
6027 * have the same delta_cyc adjustment applied if backwards_tsc
6028 * is detected. Note further, this adjustment is only done once,
6029 * as we reset last_host_tsc on all VCPUs to stop this from being
6030 * called multiple times (one for each physical CPU bringup).
6031 *
6032 * Platforms with unnreliable TSCs don't have to deal with this, they
6033 * will be compensated by the logic in vcpu_load, which sets the TSC to
6034 * catchup mode. This will catchup all VCPUs to real time, but cannot
6035 * guarantee that they stay in perfect synchronization.
6036 */
6037 if (backwards_tsc) {
6038 u64 delta_cyc = max_tsc - local_tsc;
6039 list_for_each_entry(kvm, &vm_list, vm_list) {
6040 kvm_for_each_vcpu(i, vcpu, kvm) {
6041 vcpu->arch.tsc_offset_adjustment += delta_cyc;
6042 vcpu->arch.last_host_tsc = local_tsc;
6043 }
6044
6045 /*
6046 * We have to disable TSC offset matching.. if you were
6047 * booting a VM while issuing an S4 host suspend....
6048 * you may have some problem. Solving this issue is
6049 * left as an exercise to the reader.
6050 */
6051 kvm->arch.last_tsc_nsec = 0;
6052 kvm->arch.last_tsc_write = 0;
6053 }
6054
6055 }
6056 return 0;
e9b11c17
ZX		 6057}
6058
6059void kvm_arch_hardware_disable(void *garbage)
6060{
6061 kvm_x86_ops->hardware_disable(garbage);
3548bab5 6062 drop_user_return_notifiers(garbage);
e9b11c17
ZX		 6063}
6064
6065int kvm_arch_hardware_setup(void)
6066{
6067 return kvm_x86_ops->hardware_setup();
6068}
6069
6070void kvm_arch_hardware_unsetup(void)
6071{
6072 kvm_x86_ops->hardware_unsetup();
6073}
6074
6075void kvm_arch_check_processor_compat(void *rtn)
6076{
6077 kvm_x86_ops->check_processor_compatibility(rtn);
6078}
6079
6080int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
6081{
6082 struct page *page;
6083 struct kvm *kvm;
6084 int r;
6085
6086 BUG_ON(vcpu->kvm == NULL);
6087 kvm = vcpu->kvm;
6088
9aabc88f 6089 vcpu->arch.emulate_ctxt.ops = &emulate_ops;
c5af89b6 6090 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
a4535290 6091 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
e9b11c17 6092 else
a4535290 6093 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
e9b11c17
ZX		 6094
6095 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
6096 if (!page) {
6097 r = -ENOMEM;
6098 goto fail;
6099 }
ad312c7c 6100 vcpu->arch.pio_data = page_address(page);
e9b11c17 6101
cc578287 6102 kvm_set_tsc_khz(vcpu, max_tsc_khz);
c285545f 6103
e9b11c17
ZX		 6104 r = kvm_mmu_create(vcpu);
6105 if (r < 0)
6106 goto fail_free_pio_data;
6107
6108 if (irqchip_in_kernel(kvm)) {
6109 r = kvm_create_lapic(vcpu);
6110 if (r < 0)
6111 goto fail_mmu_destroy;
6112 }
6113
890ca9ae
HY		 6114 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
6115 GFP_KERNEL);
6116 if (!vcpu->arch.mce_banks) {
6117 r = -ENOMEM;
443c39bc 6118 goto fail_free_lapic;
890ca9ae
HY		 6119 }
6120 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
6121
f5f48ee1
SY		 6122 if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL))
6123 goto fail_free_mce_banks;
6124
af585b92 6125 kvm_async_pf_hash_reset(vcpu);
f5132b01 6126 kvm_pmu_init(vcpu);
af585b92 6127
e9b11c17 6128 return 0;
f5f48ee1
SY		 6129fail_free_mce_banks:
6130 kfree(vcpu->arch.mce_banks);
443c39bc
WY		 6131fail_free_lapic:
6132 kvm_free_lapic(vcpu);
e9b11c17
ZX		 6133fail_mmu_destroy:
6134 kvm_mmu_destroy(vcpu);
6135fail_free_pio_data:
ad312c7c 6136 free_page((unsigned long)vcpu->arch.pio_data);
e9b11c17
ZX		 6137fail:
6138 return r;
6139}
6140
6141void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
6142{
f656ce01
MT		 6143 int idx;
6144
f5132b01 6145 kvm_pmu_destroy(vcpu);
36cb93fd 6146 kfree(vcpu->arch.mce_banks);
e9b11c17 6147 kvm_free_lapic(vcpu);
f656ce01 6148 idx = srcu_read_lock(&vcpu->kvm->srcu);
e9b11c17 6149 kvm_mmu_destroy(vcpu);
f656ce01 6150 srcu_read_unlock(&vcpu->kvm->srcu, idx);
ad312c7c 6151 free_page((unsigned long)vcpu->arch.pio_data);
e9b11c17 6152}
d19a9cd2 6153
e08b9637 6154int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
d19a9cd2 6155{
e08b9637
CO		 6156 if (type)
6157 return -EINVAL;
6158
f05e70ac 6159 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
4d5c5d0f 6160 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
d19a9cd2 6161
5550af4d
SY		 6162 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
6163 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
6164
038f8c11 6165 raw_spin_lock_init(&kvm->arch.tsc_write_lock);
53f658b3 6166
d89f5eff 6167 return 0;
d19a9cd2
ZX		 6168}
6169
6170static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
6171{
6172 vcpu_load(vcpu);
6173 kvm_mmu_unload(vcpu);
6174 vcpu_put(vcpu);
6175}
6176
6177static void kvm_free_vcpus(struct kvm *kvm)
6178{
6179 unsigned int i;
988a2cae 6180 struct kvm_vcpu *vcpu;
d19a9cd2
ZX		 6181
6182 /*
6183 * Unpin any mmu pages first.
6184 */
af585b92
GN		 6185 kvm_for_each_vcpu(i, vcpu, kvm) {
6186 kvm_clear_async_pf_completion_queue(vcpu);
988a2cae 6187 kvm_unload_vcpu_mmu(vcpu);
af585b92 6188 }
988a2cae
GN		 6189 kvm_for_each_vcpu(i, vcpu, kvm)
6190 kvm_arch_vcpu_free(vcpu);
6191
6192 mutex_lock(&kvm->lock);
6193 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
6194 kvm->vcpus[i] = NULL;
d19a9cd2 6195
988a2cae
GN		 6196 atomic_set(&kvm->online_vcpus, 0);
6197 mutex_unlock(&kvm->lock);
d19a9cd2
ZX		 6198}
6199
ad8ba2cd
SY		 6200void kvm_arch_sync_events(struct kvm *kvm)
6201{
ba4cef31 6202 kvm_free_all_assigned_devices(kvm);
aea924f6 6203 kvm_free_pit(kvm);
ad8ba2cd
SY		 6204}
6205
d19a9cd2
ZX		 6206void kvm_arch_destroy_vm(struct kvm *kvm)
6207{
6eb55818 6208 kvm_iommu_unmap_guest(kvm);
d7deeeb0
ZX		 6209 kfree(kvm->arch.vpic);
6210 kfree(kvm->arch.vioapic);
d19a9cd2 6211 kvm_free_vcpus(kvm);
3d45830c
AK		 6212 if (kvm->arch.apic_access_page)
6213 put_page(kvm->arch.apic_access_page);
b7ebfb05
SY		 6214 if (kvm->arch.ept_identity_pagetable)
6215 put_page(kvm->arch.ept_identity_pagetable);
d19a9cd2 6216}
0de10343 6217
f7784b8e
MT		 6218int kvm_arch_prepare_memory_region(struct kvm *kvm,
6219 struct kvm_memory_slot *memslot,
0de10343 6220 struct kvm_memory_slot old,
f7784b8e 6221 struct kvm_userspace_memory_region *mem,
0de10343
ZX		 6222 int user_alloc)
6223{
f7784b8e 6224 int npages = memslot->npages;
7ac77099
AK		 6225 int map_flags = MAP_PRIVATE | MAP_ANONYMOUS;
6226
6227 /* Prevent internal slot pages from being moved by fork()/COW. */
6228 if (memslot->id >= KVM_MEMORY_SLOTS)
6229 map_flags = MAP_SHARED | MAP_ANONYMOUS;
0de10343
ZX		 6230
6231 /*To keep backward compatibility with older userspace,
6232 *x86 needs to hanlde !user_alloc case.
6233 */
6234 if (!user_alloc) {
6235 if (npages && !old.rmap) {
604b38ac
AA		 6236 unsigned long userspace_addr;
6237
72dc67a6 6238 down_write(&current->mm->mmap_sem);
604b38ac
AA		 6239 userspace_addr = do_mmap(NULL, 0,
6240 npages * PAGE_SIZE,
6241 PROT_READ | PROT_WRITE,
7ac77099 6242 map_flags,
604b38ac 6243 0);
72dc67a6 6244 up_write(&current->mm->mmap_sem);
0de10343 6245
604b38ac
AA		 6246 if (IS_ERR((void *)userspace_addr))
6247 return PTR_ERR((void *)userspace_addr);
6248
604b38ac 6249 memslot->userspace_addr = userspace_addr;
0de10343
ZX		 6250 }
6251 }
6252
f7784b8e
MT		 6253
6254 return 0;
6255}
6256
6257void kvm_arch_commit_memory_region(struct kvm *kvm,
6258 struct kvm_userspace_memory_region *mem,
6259 struct kvm_memory_slot old,
6260 int user_alloc)
6261{
6262
48c0e4e9 6263 int nr_mmu_pages = 0, npages = mem->memory_size >> PAGE_SHIFT;
f7784b8e
MT		 6264
6265 if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
6266 int ret;
6267
6268 down_write(&current->mm->mmap_sem);
6269 ret = do_munmap(current->mm, old.userspace_addr,
6270 old.npages * PAGE_SIZE);
6271 up_write(&current->mm->mmap_sem);
6272 if (ret < 0)
6273 printk(KERN_WARNING
6274 "kvm_vm_ioctl_set_memory_region: "
6275 "failed to munmap memory\n");
6276 }
6277
48c0e4e9
XG		 6278 if (!kvm->arch.n_requested_mmu_pages)
6279 nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
6280
7c8a83b7 6281 spin_lock(&kvm->mmu_lock);
48c0e4e9 6282 if (nr_mmu_pages)
0de10343 6283 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
0de10343 6284 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
7c8a83b7 6285 spin_unlock(&kvm->mmu_lock);
0de10343 6286}
1d737c8a 6287
34d4cb8f
MT		 6288void kvm_arch_flush_shadow(struct kvm *kvm)
6289{
6290 kvm_mmu_zap_all(kvm);
8986ecc0 6291 kvm_reload_remote_mmus(kvm);
34d4cb8f
MT		 6292}
6293
1d737c8a
ZX		 6294int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
6295{
af585b92
GN		 6296 return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
6297 !vcpu->arch.apf.halted)
6298 || !list_empty_careful(&vcpu->async_pf.done)
a1b37100 6299 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
7460fb4a 6300 || atomic_read(&vcpu->arch.nmi_queued) ||
a1b37100
GN		 6301 (kvm_arch_interrupt_allowed(vcpu) &&
6302 kvm_cpu_has_interrupt(vcpu));
1d737c8a 6303}
5736199a 6304
5736199a
ZX		 6305void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
6306{
32f88400
MT		 6307 int me;
6308 int cpu = vcpu->cpu;
5736199a
ZX		 6309
6310 if (waitqueue_active(&vcpu->wq)) {
6311 wake_up_interruptible(&vcpu->wq);
6312 ++vcpu->stat.halt_wakeup;
6313 }
32f88400
MT		 6314
6315 me = get_cpu();
6316 if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
6b7e2d09 6317 if (kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE)
32f88400 6318 smp_send_reschedule(cpu);
e9571ed5 6319 put_cpu();
5736199a 6320}
78646121
GN		 6321
6322int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
6323{
6324 return kvm_x86_ops->interrupt_allowed(vcpu);
6325}
229456fc 6326
f92653ee
JK		 6327bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
6328{
6329 unsigned long current_rip = kvm_rip_read(vcpu) +
6330 get_segment_base(vcpu, VCPU_SREG_CS);
6331
6332 return current_rip == linear_rip;
6333}
6334EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
6335
94fe45da
JK		 6336unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
6337{
6338 unsigned long rflags;
6339
6340 rflags = kvm_x86_ops->get_rflags(vcpu);
6341 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
c310bac5 6342 rflags &= ~X86_EFLAGS_TF;
94fe45da
JK		 6343 return rflags;
6344}
6345EXPORT_SYMBOL_GPL(kvm_get_rflags);
6346
6347void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
6348{
6349 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
f92653ee 6350 kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
c310bac5 6351 rflags |= X86_EFLAGS_TF;
94fe45da 6352 kvm_x86_ops->set_rflags(vcpu, rflags);
3842d135 6353 kvm_make_request(KVM_REQ_EVENT, vcpu);
94fe45da
JK		 6354}
6355EXPORT_SYMBOL_GPL(kvm_set_rflags);
6356
56028d08
GN		 6357void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
6358{
6359 int r;
6360
fb67e14f 6361 if ((vcpu->arch.mmu.direct_map != work->arch.direct_map) ||
c4806acd 6362 is_error_page(work->page))
56028d08
GN		 6363 return;
6364
6365 r = kvm_mmu_reload(vcpu);
6366 if (unlikely(r))
6367 return;
6368
fb67e14f
XG		 6369 if (!vcpu->arch.mmu.direct_map &&
6370 work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu))
6371 return;
6372
56028d08
GN		 6373 vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true);
6374}
6375
af585b92
GN		 6376static inline u32 kvm_async_pf_hash_fn(gfn_t gfn)
6377{
6378 return hash_32(gfn & 0xffffffff, order_base_2(ASYNC_PF_PER_VCPU));
6379}
6380
6381static inline u32 kvm_async_pf_next_probe(u32 key)
6382{
6383 return (key + 1) & (roundup_pow_of_two(ASYNC_PF_PER_VCPU) - 1);
6384}
6385
6386static void kvm_add_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6387{
6388 u32 key = kvm_async_pf_hash_fn(gfn);
6389
6390 while (vcpu->arch.apf.gfns[key] != ~0)
6391 key = kvm_async_pf_next_probe(key);
6392
6393 vcpu->arch.apf.gfns[key] = gfn;
6394}
6395
6396static u32 kvm_async_pf_gfn_slot(struct kvm_vcpu *vcpu, gfn_t gfn)
6397{
6398 int i;
6399 u32 key = kvm_async_pf_hash_fn(gfn);
6400
6401 for (i = 0; i < roundup_pow_of_two(ASYNC_PF_PER_VCPU) &&
c7d28c24
XG		 6402 (vcpu->arch.apf.gfns[key] != gfn &&
6403 vcpu->arch.apf.gfns[key] != ~0); i++)
af585b92
GN		 6404 key = kvm_async_pf_next_probe(key);
6405
6406 return key;
6407}
6408
6409bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6410{
6411 return vcpu->arch.apf.gfns[kvm_async_pf_gfn_slot(vcpu, gfn)] == gfn;
6412}
6413
6414static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
6415{
6416 u32 i, j, k;
6417
6418 i = j = kvm_async_pf_gfn_slot(vcpu, gfn);
6419 while (true) {
6420 vcpu->arch.apf.gfns[i] = ~0;
6421 do {
6422 j = kvm_async_pf_next_probe(j);
6423 if (vcpu->arch.apf.gfns[j] == ~0)
6424 return;
6425 k = kvm_async_pf_hash_fn(vcpu->arch.apf.gfns[j]);
6426 /*
6427 * k lies cyclically in ]i,j]
6428 * | i.k.j |
6429 * |....j i.k.| or |.k..j i...|
6430 */
6431 } while ((i <= j) ? (i < k && k <= j) : (i < k || k <= j));
6432 vcpu->arch.apf.gfns[i] = vcpu->arch.apf.gfns[j];
6433 i = j;
6434 }
6435}
6436
7c90705b
GN		 6437static int apf_put_user(struct kvm_vcpu *vcpu, u32 val)
6438{
6439
6440 return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val,
6441 sizeof(val));
6442}
6443
af585b92
GN		 6444void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
6445 struct kvm_async_pf *work)
6446{
6389ee94
AK		 6447 struct x86_exception fault;
6448
7c90705b 6449 trace_kvm_async_pf_not_present(work->arch.token, work->gva);
af585b92 6450 kvm_add_async_pf_gfn(vcpu, work->arch.gfn);
7c90705b
GN		 6451
6452 if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) ||
fc5f06fa
GN		 6453 (vcpu->arch.apf.send_user_only &&
6454 kvm_x86_ops->get_cpl(vcpu) == 0))
7c90705b
GN		 6455 kvm_make_request(KVM_REQ_APF_HALT, vcpu);
6456 else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) {
6389ee94
AK		 6457 fault.vector = PF_VECTOR;
6458 fault.error_code_valid = true;
6459 fault.error_code = 0;
6460 fault.nested_page_fault = false;
6461 fault.address = work->arch.token;
6462 kvm_inject_page_fault(vcpu, &fault);
7c90705b 6463 }
af585b92
GN		 6464}
6465
6466void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
6467 struct kvm_async_pf *work)
6468{
6389ee94
AK		 6469 struct x86_exception fault;
6470
7c90705b
GN		 6471 trace_kvm_async_pf_ready(work->arch.token, work->gva);
6472 if (is_error_page(work->page))
6473 work->arch.token = ~0; /* broadcast wakeup */
6474 else
6475 kvm_del_async_pf_gfn(vcpu, work->arch.gfn);
6476
6477 if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) &&
6478 !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) {
6389ee94
AK		 6479 fault.vector = PF_VECTOR;
6480 fault.error_code_valid = true;
6481 fault.error_code = 0;
6482 fault.nested_page_fault = false;
6483 fault.address = work->arch.token;
6484 kvm_inject_page_fault(vcpu, &fault);
7c90705b 6485 }
e6d53e3b 6486 vcpu->arch.apf.halted = false;
7c90705b
GN		 6487}
6488
6489bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu)
6490{
6491 if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED))
6492 return true;
6493 else
6494 return !kvm_event_needs_reinjection(vcpu) &&
6495 kvm_x86_ops->interrupt_allowed(vcpu);
af585b92
GN		 6496}
6497
229456fc
MT		 6498EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
6499EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
6500EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
6501EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
6502EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
0ac406de 6503EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
d8cabddf 6504EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
17897f36 6505EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
236649de 6506EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
ec1ff790 6507EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
532a46b9 6508EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
2e554e8d 6509EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);
kernel source for telekom puls (alcatel/mediatek)