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KVM: coalesced_mmio: fix kvm_coalesced_mmio_init()'s error handling
[deliverable/linux.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
043405e1
CO		 9 *
10 * Authors:
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
4d5c5d0f
BAY		 13 * Amit Shah <amit.shah@qumranet.com>
14 * Ben-Ami Yassour <benami@il.ibm.com>
043405e1
CO		 15 *
16 * This work is licensed under the terms of the GNU GPL, version 2. See
17 * the COPYING file in the top-level directory.
18 *
19 */
20
edf88417 21#include <linux/kvm_host.h>
313a3dc7 22#include "irq.h"
1d737c8a 23#include "mmu.h"
7837699f 24#include "i8254.h"
37817f29 25#include "tss.h"
5fdbf976 26#include "kvm_cache_regs.h"
26eef70c 27#include "x86.h"
313a3dc7 28
18068523 29#include <linux/clocksource.h>
4d5c5d0f 30#include <linux/interrupt.h>
313a3dc7
CO		 31#include <linux/kvm.h>
32#include <linux/fs.h>
33#include <linux/vmalloc.h>
5fb76f9b 34#include <linux/module.h>
0de10343 35#include <linux/mman.h>
2bacc55c 36#include <linux/highmem.h>
19de40a8 37#include <linux/iommu.h>
62c476c7 38#include <linux/intel-iommu.h>
c8076604 39#include <linux/cpufreq.h>
18863bdd 40#include <linux/user-return-notifier.h>
a983fb23 41#include <linux/srcu.h>
5a0e3ad6 42#include <linux/slab.h>
aec51dc4 43#include <trace/events/kvm.h>
2ed152af 44
229456fc
MT		 45#define CREATE_TRACE_POINTS
46#include "trace.h"
043405e1 47
24f1e32c 48#include <asm/debugreg.h>
043405e1 49#include <asm/uaccess.h>
d825ed0a 50#include <asm/msr.h>
a5f61300 51#include <asm/desc.h>
0bed3b56 52#include <asm/mtrr.h>
890ca9ae 53#include <asm/mce.h>
043405e1 54
313a3dc7 55#define MAX_IO_MSRS 256
a03490ed
CO		 56#define CR0_RESERVED_BITS \
57 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
58 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
59 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
60#define CR4_RESERVED_BITS \
61 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
62 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
63 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
64 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
65
66#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
890ca9ae
HY		 67
68#define KVM_MAX_MCE_BANKS 32
69#define KVM_MCE_CAP_SUPPORTED MCG_CTL_P
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
76static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
77#else
78static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
79#endif
313a3dc7 80
ba1389b7
AK		 81#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
82#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
417bc304 83
cb142eb7 84static void update_cr8_intercept(struct kvm_vcpu *vcpu);
674eea0f
AK		 85static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
86 struct kvm_cpuid_entry2 __user *entries);
87
97896d04 88struct kvm_x86_ops *kvm_x86_ops;
5fdbf976 89EXPORT_SYMBOL_GPL(kvm_x86_ops);
97896d04 90
ed85c068
AP		 91int ignore_msrs = 0;
92module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR);
93
18863bdd
AK		 94#define KVM_NR_SHARED_MSRS 16
95
96struct kvm_shared_msrs_global {
97 int nr;
2bf78fa7 98 u32 msrs[KVM_NR_SHARED_MSRS];
18863bdd
AK		 99};
100
101struct kvm_shared_msrs {
102 struct user_return_notifier urn;
103 bool registered;
2bf78fa7
SY		 104 struct kvm_shared_msr_values {
105 u64 host;
106 u64 curr;
107 } values[KVM_NR_SHARED_MSRS];
18863bdd
AK		 108};
109
110static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
111static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
112
417bc304 113struct kvm_stats_debugfs_item debugfs_entries[] = {
ba1389b7
AK		 114 { "pf_fixed", VCPU_STAT(pf_fixed) },
115 { "pf_guest", VCPU_STAT(pf_guest) },
116 { "tlb_flush", VCPU_STAT(tlb_flush) },
117 { "invlpg", VCPU_STAT(invlpg) },
118 { "exits", VCPU_STAT(exits) },
119 { "io_exits", VCPU_STAT(io_exits) },
120 { "mmio_exits", VCPU_STAT(mmio_exits) },
121 { "signal_exits", VCPU_STAT(signal_exits) },
122 { "irq_window", VCPU_STAT(irq_window_exits) },
f08864b4 123 { "nmi_window", VCPU_STAT(nmi_window_exits) },
ba1389b7
AK		 124 { "halt_exits", VCPU_STAT(halt_exits) },
125 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
f11c3a8d 126 { "hypercalls", VCPU_STAT(hypercalls) },
ba1389b7
AK		 127 { "request_irq", VCPU_STAT(request_irq_exits) },
128 { "irq_exits", VCPU_STAT(irq_exits) },
129 { "host_state_reload", VCPU_STAT(host_state_reload) },
130 { "efer_reload", VCPU_STAT(efer_reload) },
131 { "fpu_reload", VCPU_STAT(fpu_reload) },
132 { "insn_emulation", VCPU_STAT(insn_emulation) },
133 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
fa89a817 134 { "irq_injections", VCPU_STAT(irq_injections) },
c4abb7c9 135 { "nmi_injections", VCPU_STAT(nmi_injections) },
4cee5764
AK		 136 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
137 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
138 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
139 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
140 { "mmu_flooded", VM_STAT(mmu_flooded) },
141 { "mmu_recycled", VM_STAT(mmu_recycled) },
dfc5aa00 142 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
4731d4c7 143 { "mmu_unsync", VM_STAT(mmu_unsync) },
0f74a24c 144 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
05da4558 145 { "largepages", VM_STAT(lpages) },
417bc304
HB		 146 { NULL }
147};
148
18863bdd
AK		 149static void kvm_on_user_return(struct user_return_notifier *urn)
150{
151 unsigned slot;
18863bdd
AK		 152 struct kvm_shared_msrs *locals
153 = container_of(urn, struct kvm_shared_msrs, urn);
2bf78fa7 154 struct kvm_shared_msr_values *values;
18863bdd
AK		 155
156 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
2bf78fa7
SY		 157 values = &locals->values[slot];
158 if (values->host != values->curr) {
159 wrmsrl(shared_msrs_global.msrs[slot], values->host);
160 values->curr = values->host;
18863bdd
AK		 161 }
162 }
163 locals->registered = false;
164 user_return_notifier_unregister(urn);
165}
166
2bf78fa7 167static void shared_msr_update(unsigned slot, u32 msr)
18863bdd 168{
2bf78fa7 169 struct kvm_shared_msrs *smsr;
18863bdd
AK		 170 u64 value;
171
2bf78fa7
SY		 172 smsr = &__get_cpu_var(shared_msrs);
173 /* only read, and nobody should modify it at this time,
174 * so don't need lock */
175 if (slot >= shared_msrs_global.nr) {
176 printk(KERN_ERR "kvm: invalid MSR slot!");
177 return;
178 }
179 rdmsrl_safe(msr, &value);
180 smsr->values[slot].host = value;
181 smsr->values[slot].curr = value;
182}
183
184void kvm_define_shared_msr(unsigned slot, u32 msr)
185{
18863bdd
AK		 186 if (slot >= shared_msrs_global.nr)
187 shared_msrs_global.nr = slot + 1;
2bf78fa7
SY		 188 shared_msrs_global.msrs[slot] = msr;
189 /* we need ensured the shared_msr_global have been updated */
190 smp_wmb();
18863bdd
AK		 191}
192EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
193
194static void kvm_shared_msr_cpu_online(void)
195{
196 unsigned i;
18863bdd
AK		 197
198 for (i = 0; i < shared_msrs_global.nr; ++i)
2bf78fa7 199 shared_msr_update(i, shared_msrs_global.msrs[i]);
18863bdd
AK		 200}
201
d5696725 202void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
18863bdd
AK		 203{
204 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
205
2bf78fa7 206 if (((value ^ smsr->values[slot].curr) & mask) == 0)
18863bdd 207 return;
2bf78fa7
SY		 208 smsr->values[slot].curr = value;
209 wrmsrl(shared_msrs_global.msrs[slot], value);
18863bdd
AK		 210 if (!smsr->registered) {
211 smsr->urn.on_user_return = kvm_on_user_return;
212 user_return_notifier_register(&smsr->urn);
213 smsr->registered = true;
214 }
215}
216EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
217
3548bab5
AK		 218static void drop_user_return_notifiers(void *ignore)
219{
220 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
221
222 if (smsr->registered)
223 kvm_on_user_return(&smsr->urn);
224}
225
6866b83e
CO		 226u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
227{
228 if (irqchip_in_kernel(vcpu->kvm))
ad312c7c 229 return vcpu->arch.apic_base;
6866b83e 230 else
ad312c7c 231 return vcpu->arch.apic_base;
6866b83e
CO		 232}
233EXPORT_SYMBOL_GPL(kvm_get_apic_base);
234
235void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
236{
237 /* TODO: reserve bits check */
238 if (irqchip_in_kernel(vcpu->kvm))
239 kvm_lapic_set_base(vcpu, data);
240 else
ad312c7c 241 vcpu->arch.apic_base = data;
6866b83e
CO		 242}
243EXPORT_SYMBOL_GPL(kvm_set_apic_base);
244
3fd28fce
ED		 245#define EXCPT_BENIGN 0
246#define EXCPT_CONTRIBUTORY 1
247#define EXCPT_PF 2
248
249static int exception_class(int vector)
250{
251 switch (vector) {
252 case PF_VECTOR:
253 return EXCPT_PF;
254 case DE_VECTOR:
255 case TS_VECTOR:
256 case NP_VECTOR:
257 case SS_VECTOR:
258 case GP_VECTOR:
259 return EXCPT_CONTRIBUTORY;
260 default:
261 break;
262 }
263 return EXCPT_BENIGN;
264}
265
266static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
267 unsigned nr, bool has_error, u32 error_code)
268{
269 u32 prev_nr;
270 int class1, class2;
271
272 if (!vcpu->arch.exception.pending) {
273 queue:
274 vcpu->arch.exception.pending = true;
275 vcpu->arch.exception.has_error_code = has_error;
276 vcpu->arch.exception.nr = nr;
277 vcpu->arch.exception.error_code = error_code;
278 return;
279 }
280
281 /* to check exception */
282 prev_nr = vcpu->arch.exception.nr;
283 if (prev_nr == DF_VECTOR) {
284 /* triple fault -> shutdown */
285 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
286 return;
287 }
288 class1 = exception_class(prev_nr);
289 class2 = exception_class(nr);
290 if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY)
291 || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) {
292 /* generate double fault per SDM Table 5-5 */
293 vcpu->arch.exception.pending = true;
294 vcpu->arch.exception.has_error_code = true;
295 vcpu->arch.exception.nr = DF_VECTOR;
296 vcpu->arch.exception.error_code = 0;
297 } else
298 /* replace previous exception with a new one in a hope
299 that instruction re-execution will regenerate lost
300 exception */
301 goto queue;
302}
303
298101da
AK		 304void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
305{
3fd28fce 306 kvm_multiple_exception(vcpu, nr, false, 0);
298101da
AK		 307}
308EXPORT_SYMBOL_GPL(kvm_queue_exception);
309
c3c91fee
AK		 310void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
311 u32 error_code)
312{
313 ++vcpu->stat.pf_guest;
ad312c7c 314 vcpu->arch.cr2 = addr;
c3c91fee
AK		 315 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
316}
317
3419ffc8
SY		 318void kvm_inject_nmi(struct kvm_vcpu *vcpu)
319{
320 vcpu->arch.nmi_pending = 1;
321}
322EXPORT_SYMBOL_GPL(kvm_inject_nmi);
323
298101da
AK		 324void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
325{
3fd28fce 326 kvm_multiple_exception(vcpu, nr, true, error_code);
298101da
AK		 327}
328EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
329
0a79b009
AK		 330/*
331 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
332 * a #GP and return false.
333 */
334bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
298101da 335{
0a79b009
AK		 336 if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl)
337 return true;
338 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
339 return false;
298101da 340}
0a79b009 341EXPORT_SYMBOL_GPL(kvm_require_cpl);
298101da 342
a03490ed
CO		 343/*
344 * Load the pae pdptrs. Return true is they are all valid.
345 */
346int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
347{
348 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
349 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
350 int i;
351 int ret;
ad312c7c 352 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
a03490ed 353
a03490ed
CO		 354 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
355 offset * sizeof(u64), sizeof(pdpte));
356 if (ret < 0) {
357 ret = 0;
358 goto out;
359 }
360 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
43a3795a 361 if (is_present_gpte(pdpte[i]) &&
20c466b5 362 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
a03490ed
CO		 363 ret = 0;
364 goto out;
365 }
366 }
367 ret = 1;
368
ad312c7c 369 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
6de4f3ad
AK		 370 __set_bit(VCPU_EXREG_PDPTR,
371 (unsigned long *)&vcpu->arch.regs_avail);
372 __set_bit(VCPU_EXREG_PDPTR,
373 (unsigned long *)&vcpu->arch.regs_dirty);
a03490ed 374out:
a03490ed
CO		 375
376 return ret;
377}
cc4b6871 378EXPORT_SYMBOL_GPL(load_pdptrs);
a03490ed 379
d835dfec
AK		 380static bool pdptrs_changed(struct kvm_vcpu *vcpu)
381{
ad312c7c 382 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
d835dfec
AK		 383 bool changed = true;
384 int r;
385
386 if (is_long_mode(vcpu) || !is_pae(vcpu))
387 return false;
388
6de4f3ad
AK		 389 if (!test_bit(VCPU_EXREG_PDPTR,
390 (unsigned long *)&vcpu->arch.regs_avail))
391 return true;
392
ad312c7c 393 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
d835dfec
AK		 394 if (r < 0)
395 goto out;
ad312c7c 396 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
d835dfec 397out:
d835dfec
AK		 398
399 return changed;
400}
401
2d3ad1f4 402void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
a03490ed 403{
f9a48e6a
AK		 404 cr0 |= X86_CR0_ET;
405
ab344828
GN		 406#ifdef CONFIG_X86_64
407 if (cr0 & 0xffffffff00000000UL) {
c1a5d4f9 408 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 409 return;
410 }
ab344828
GN		 411#endif
412
413 cr0 &= ~CR0_RESERVED_BITS;
a03490ed
CO		 414
415 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
c1a5d4f9 416 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 417 return;
418 }
419
420 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
c1a5d4f9 421 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 422 return;
423 }
424
425 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
426#ifdef CONFIG_X86_64
f6801dff 427 if ((vcpu->arch.efer & EFER_LME)) {
a03490ed
CO		 428 int cs_db, cs_l;
429
430 if (!is_pae(vcpu)) {
c1a5d4f9 431 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 432 return;
433 }
434 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
435 if (cs_l) {
c1a5d4f9 436 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 437 return;
438
439 }
440 } else
441#endif
ad312c7c 442 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
c1a5d4f9 443 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 444 return;
445 }
446
447 }
448
449 kvm_x86_ops->set_cr0(vcpu, cr0);
a03490ed 450
a03490ed 451 kvm_mmu_reset_context(vcpu);
a03490ed
CO		 452 return;
453}
2d3ad1f4 454EXPORT_SYMBOL_GPL(kvm_set_cr0);
a03490ed 455
2d3ad1f4 456void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
a03490ed 457{
4d4ec087 458 kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0ful) | (msw & 0x0f));
a03490ed 459}
2d3ad1f4 460EXPORT_SYMBOL_GPL(kvm_lmsw);
a03490ed 461
2d3ad1f4 462void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
a03490ed 463{
fc78f519 464 unsigned long old_cr4 = kvm_read_cr4(vcpu);
a2edf57f
AK		 465 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE;
466
a03490ed 467 if (cr4 & CR4_RESERVED_BITS) {
c1a5d4f9 468 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 469 return;
470 }
471
472 if (is_long_mode(vcpu)) {
473 if (!(cr4 & X86_CR4_PAE)) {
c1a5d4f9 474 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 475 return;
476 }
a2edf57f
AK		 477 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
478 && ((cr4 ^ old_cr4) & pdptr_bits)
ad312c7c 479 && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
c1a5d4f9 480 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 481 return;
482 }
483
484 if (cr4 & X86_CR4_VMXE) {
c1a5d4f9 485 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 486 return;
487 }
488 kvm_x86_ops->set_cr4(vcpu, cr4);
ad312c7c 489 vcpu->arch.cr4 = cr4;
5a41accd 490 vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled;
a03490ed 491 kvm_mmu_reset_context(vcpu);
a03490ed 492}
2d3ad1f4 493EXPORT_SYMBOL_GPL(kvm_set_cr4);
a03490ed 494
2d3ad1f4 495void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
a03490ed 496{
ad312c7c 497 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
0ba73cda 498 kvm_mmu_sync_roots(vcpu);
d835dfec
AK		 499 kvm_mmu_flush_tlb(vcpu);
500 return;
501 }
502
a03490ed
CO		 503 if (is_long_mode(vcpu)) {
504 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
c1a5d4f9 505 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 506 return;
507 }
508 } else {
509 if (is_pae(vcpu)) {
510 if (cr3 & CR3_PAE_RESERVED_BITS) {
c1a5d4f9 511 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 512 return;
513 }
514 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
c1a5d4f9 515 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 516 return;
517 }
518 }
519 /*
520 * We don't check reserved bits in nonpae mode, because
521 * this isn't enforced, and VMware depends on this.
522 */
523 }
524
a03490ed
CO		 525 /*
526 * Does the new cr3 value map to physical memory? (Note, we
527 * catch an invalid cr3 even in real-mode, because it would
528 * cause trouble later on when we turn on paging anyway.)
529 *
530 * A real CPU would silently accept an invalid cr3 and would
531 * attempt to use it - with largely undefined (and often hard
532 * to debug) behavior on the guest side.
533 */
534 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
c1a5d4f9 535 kvm_inject_gp(vcpu, 0);
a03490ed 536 else {
ad312c7c
ZX		 537 vcpu->arch.cr3 = cr3;
538 vcpu->arch.mmu.new_cr3(vcpu);
a03490ed 539 }
a03490ed 540}
2d3ad1f4 541EXPORT_SYMBOL_GPL(kvm_set_cr3);
a03490ed 542
2d3ad1f4 543void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
a03490ed
CO		 544{
545 if (cr8 & CR8_RESERVED_BITS) {
c1a5d4f9 546 kvm_inject_gp(vcpu, 0);
a03490ed
CO		 547 return;
548 }
549 if (irqchip_in_kernel(vcpu->kvm))
550 kvm_lapic_set_tpr(vcpu, cr8);
551 else
ad312c7c 552 vcpu->arch.cr8 = cr8;
a03490ed 553}
2d3ad1f4 554EXPORT_SYMBOL_GPL(kvm_set_cr8);
a03490ed 555
2d3ad1f4 556unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
a03490ed
CO		 557{
558 if (irqchip_in_kernel(vcpu->kvm))
559 return kvm_lapic_get_cr8(vcpu);
560 else
ad312c7c 561 return vcpu->arch.cr8;
a03490ed 562}
2d3ad1f4 563EXPORT_SYMBOL_GPL(kvm_get_cr8);
a03490ed 564
d8017474
AG		 565static inline u32 bit(int bitno)
566{
567 return 1 << (bitno & 31);
568}
569
043405e1
CO		 570/*
571 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
572 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
573 *
574 * This list is modified at module load time to reflect the
e3267cbb
GC		 575 * capabilities of the host cpu. This capabilities test skips MSRs that are
576 * kvm-specific. Those are put in the beginning of the list.
043405e1 577 */
e3267cbb 578
10388a07 579#define KVM_SAVE_MSRS_BEGIN 5
043405e1 580static u32 msrs_to_save[] = {
e3267cbb 581 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
55cd8e5a 582 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
10388a07 583 HV_X64_MSR_APIC_ASSIST_PAGE,
043405e1
CO		 584 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
585 MSR_K6_STAR,
586#ifdef CONFIG_X86_64
587 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
588#endif
e3267cbb 589 MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
043405e1
CO		 590};
591
592static unsigned num_msrs_to_save;
593
594static u32 emulated_msrs[] = {
595 MSR_IA32_MISC_ENABLE,
596};
597
15c4a640
CO		 598static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
599{
f2b4b7dd 600 if (efer & efer_reserved_bits) {
c1a5d4f9 601 kvm_inject_gp(vcpu, 0);
15c4a640
CO		 602 return;
603 }
604
605 if (is_paging(vcpu)
f6801dff 606 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) {
c1a5d4f9 607 kvm_inject_gp(vcpu, 0);
15c4a640
CO		 608 return;
609 }
610
1b2fd70c
AG		 611 if (efer & EFER_FFXSR) {
612 struct kvm_cpuid_entry2 *feat;
613
614 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
615 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) {
1b2fd70c
AG		 616 kvm_inject_gp(vcpu, 0);
617 return;
618 }
619 }
620
d8017474
AG		 621 if (efer & EFER_SVME) {
622 struct kvm_cpuid_entry2 *feat;
623
624 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
625 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) {
d8017474
AG		 626 kvm_inject_gp(vcpu, 0);
627 return;
628 }
629 }
630
15c4a640
CO		 631 kvm_x86_ops->set_efer(vcpu, efer);
632
633 efer &= ~EFER_LMA;
f6801dff 634 efer |= vcpu->arch.efer & EFER_LMA;
15c4a640 635
f6801dff 636 vcpu->arch.efer = efer;
9645bb56
AK		 637
638 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
639 kvm_mmu_reset_context(vcpu);
15c4a640
CO		 640}
641
f2b4b7dd
JR		 642void kvm_enable_efer_bits(u64 mask)
643{
644 efer_reserved_bits &= ~mask;
645}
646EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
647
648
15c4a640
CO		 649/*
650 * Writes msr value into into the appropriate "register".
651 * Returns 0 on success, non-0 otherwise.
652 * Assumes vcpu_load() was already called.
653 */
654int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
655{
656 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
657}
658
313a3dc7
CO		 659/*
660 * Adapt set_msr() to msr_io()'s calling convention
661 */
662static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
663{
664 return kvm_set_msr(vcpu, index, *data);
665}
666
18068523
GOC		 667static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
668{
669 static int version;
50d0a0f9 670 struct pvclock_wall_clock wc;
923de3cf 671 struct timespec boot;
18068523
GOC		 672
673 if (!wall_clock)
674 return;
675
676 version++;
677
18068523
GOC		 678 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
679
50d0a0f9
GH		 680 /*
681 * The guest calculates current wall clock time by adding
682 * system time (updated by kvm_write_guest_time below) to the
683 * wall clock specified here. guest system time equals host
684 * system time for us, thus we must fill in host boot time here.
685 */
923de3cf 686 getboottime(&boot);
50d0a0f9
GH		 687
688 wc.sec = boot.tv_sec;
689 wc.nsec = boot.tv_nsec;
690 wc.version = version;
18068523
GOC		 691
692 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
693
694 version++;
695 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
18068523
GOC		 696}
697
50d0a0f9
GH		 698static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
699{
700 uint32_t quotient, remainder;
701
702 /* Don't try to replace with do_div(), this one calculates
703 * "(dividend << 32) / divisor" */
704 __asm__ ( "divl %4"
705 : "=a" (quotient), "=d" (remainder)
706 : "0" (0), "1" (dividend), "r" (divisor) );
707 return quotient;
708}
709
710static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock)
711{
712 uint64_t nsecs = 1000000000LL;
713 int32_t shift = 0;
714 uint64_t tps64;
715 uint32_t tps32;
716
717 tps64 = tsc_khz * 1000LL;
718 while (tps64 > nsecs*2) {
719 tps64 >>= 1;
720 shift--;
721 }
722
723 tps32 = (uint32_t)tps64;
724 while (tps32 <= (uint32_t)nsecs) {
725 tps32 <<= 1;
726 shift++;
727 }
728
729 hv_clock->tsc_shift = shift;
730 hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32);
731
732 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
80a914dc 733 __func__, tsc_khz, hv_clock->tsc_shift,
50d0a0f9
GH		 734 hv_clock->tsc_to_system_mul);
735}
736
c8076604
GH		 737static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
738
18068523
GOC		 739static void kvm_write_guest_time(struct kvm_vcpu *v)
740{
741 struct timespec ts;
742 unsigned long flags;
743 struct kvm_vcpu_arch *vcpu = &v->arch;
744 void *shared_kaddr;
463656c0 745 unsigned long this_tsc_khz;
18068523
GOC		 746
747 if ((!vcpu->time_page))
748 return;
749
463656c0
AK		 750 this_tsc_khz = get_cpu_var(cpu_tsc_khz);
751 if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) {
752 kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock);
753 vcpu->hv_clock_tsc_khz = this_tsc_khz;
50d0a0f9 754 }
463656c0 755 put_cpu_var(cpu_tsc_khz);
50d0a0f9 756
18068523
GOC		 757 /* Keep irq disabled to prevent changes to the clock */
758 local_irq_save(flags);
af24a4e4 759 kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp);
18068523 760 ktime_get_ts(&ts);
923de3cf 761 monotonic_to_bootbased(&ts);
18068523
GOC		 762 local_irq_restore(flags);
763
764 /* With all the info we got, fill in the values */
765
766 vcpu->hv_clock.system_time = ts.tv_nsec +
afbcf7ab
GC		 767 (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset;
768
18068523
GOC		 769 /*
770 * The interface expects us to write an even number signaling that the
771 * update is finished. Since the guest won't see the intermediate
50d0a0f9 772 * state, we just increase by 2 at the end.
18068523 773 */
50d0a0f9 774 vcpu->hv_clock.version += 2;
18068523
GOC		 775
776 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
777
778 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
50d0a0f9 779 sizeof(vcpu->hv_clock));
18068523
GOC		 780
781 kunmap_atomic(shared_kaddr, KM_USER0);
782
783 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
784}
785
c8076604
GH		 786static int kvm_request_guest_time_update(struct kvm_vcpu *v)
787{
788 struct kvm_vcpu_arch *vcpu = &v->arch;
789
790 if (!vcpu->time_page)
791 return 0;
792 set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests);
793 return 1;
794}
795
9ba075a6
AK		 796static bool msr_mtrr_valid(unsigned msr)
797{
798 switch (msr) {
799 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
800 case MSR_MTRRfix64K_00000:
801 case MSR_MTRRfix16K_80000:
802 case MSR_MTRRfix16K_A0000:
803 case MSR_MTRRfix4K_C0000:
804 case MSR_MTRRfix4K_C8000:
805 case MSR_MTRRfix4K_D0000:
806 case MSR_MTRRfix4K_D8000:
807 case MSR_MTRRfix4K_E0000:
808 case MSR_MTRRfix4K_E8000:
809 case MSR_MTRRfix4K_F0000:
810 case MSR_MTRRfix4K_F8000:
811 case MSR_MTRRdefType:
812 case MSR_IA32_CR_PAT:
813 return true;
814 case 0x2f8:
815 return true;
816 }
817 return false;
818}
819
d6289b93
MT		 820static bool valid_pat_type(unsigned t)
821{
822 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
823}
824
825static bool valid_mtrr_type(unsigned t)
826{
827 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
828}
829
830static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
831{
832 int i;
833
834 if (!msr_mtrr_valid(msr))
835 return false;
836
837 if (msr == MSR_IA32_CR_PAT) {
838 for (i = 0; i < 8; i++)
839 if (!valid_pat_type((data >> (i * 8)) & 0xff))
840 return false;
841 return true;
842 } else if (msr == MSR_MTRRdefType) {
843 if (data & ~0xcff)
844 return false;
845 return valid_mtrr_type(data & 0xff);
846 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
847 for (i = 0; i < 8 ; i++)
848 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
849 return false;
850 return true;
851 }
852
853 /* variable MTRRs */
854 return valid_mtrr_type(data & 0xff);
855}
856
9ba075a6
AK		 857static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
858{
0bed3b56
SY		 859 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
860
d6289b93 861 if (!mtrr_valid(vcpu, msr, data))
9ba075a6
AK		 862 return 1;
863
0bed3b56
SY		 864 if (msr == MSR_MTRRdefType) {
865 vcpu->arch.mtrr_state.def_type = data;
866 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
867 } else if (msr == MSR_MTRRfix64K_00000)
868 p[0] = data;
869 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
870 p[1 + msr - MSR_MTRRfix16K_80000] = data;
871 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
872 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
873 else if (msr == MSR_IA32_CR_PAT)
874 vcpu->arch.pat = data;
875 else { /* Variable MTRRs */
876 int idx, is_mtrr_mask;
877 u64 *pt;
878
879 idx = (msr - 0x200) / 2;
880 is_mtrr_mask = msr - 0x200 - 2 * idx;
881 if (!is_mtrr_mask)
882 pt =
883 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
884 else
885 pt =
886 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
887 *pt = data;
888 }
889
890 kvm_mmu_reset_context(vcpu);
9ba075a6
AK		 891 return 0;
892}
15c4a640 893
890ca9ae 894static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
15c4a640 895{
890ca9ae
HY		 896 u64 mcg_cap = vcpu->arch.mcg_cap;
897 unsigned bank_num = mcg_cap & 0xff;
898
15c4a640 899 switch (msr) {
15c4a640 900 case MSR_IA32_MCG_STATUS:
890ca9ae 901 vcpu->arch.mcg_status = data;
15c4a640 902 break;
c7ac679c 903 case MSR_IA32_MCG_CTL:
890ca9ae
HY		 904 if (!(mcg_cap & MCG_CTL_P))
905 return 1;
906 if (data != 0 && data != ~(u64)0)
907 return -1;
908 vcpu->arch.mcg_ctl = data;
909 break;
910 default:
911 if (msr >= MSR_IA32_MC0_CTL &&
912 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
913 u32 offset = msr - MSR_IA32_MC0_CTL;
114be429
AP		 914 /* only 0 or all 1s can be written to IA32_MCi_CTL
915 * some Linux kernels though clear bit 10 in bank 4 to
916 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
917 * this to avoid an uncatched #GP in the guest
918 */
890ca9ae 919 if ((offset & 0x3) == 0 &&
114be429 920 data != 0 && (data | (1 << 10)) != ~(u64)0)
890ca9ae
HY		 921 return -1;
922 vcpu->arch.mce_banks[offset] = data;
923 break;
924 }
925 return 1;
926 }
927 return 0;
928}
929
ffde22ac
ES		 930static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
931{
932 struct kvm *kvm = vcpu->kvm;
933 int lm = is_long_mode(vcpu);
934 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
935 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
936 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
937 : kvm->arch.xen_hvm_config.blob_size_32;
938 u32 page_num = data & ~PAGE_MASK;
939 u64 page_addr = data & PAGE_MASK;
940 u8 *page;
941 int r;
942
943 r = -E2BIG;
944 if (page_num >= blob_size)
945 goto out;
946 r = -ENOMEM;
947 page = kzalloc(PAGE_SIZE, GFP_KERNEL);
948 if (!page)
949 goto out;
950 r = -EFAULT;
951 if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE))
952 goto out_free;
953 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
954 goto out_free;
955 r = 0;
956out_free:
957 kfree(page);
958out:
959 return r;
960}
961
55cd8e5a
GN		 962static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
963{
964 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
965}
966
967static bool kvm_hv_msr_partition_wide(u32 msr)
968{
969 bool r = false;
970 switch (msr) {
971 case HV_X64_MSR_GUEST_OS_ID:
972 case HV_X64_MSR_HYPERCALL:
973 r = true;
974 break;
975 }
976
977 return r;
978}
979
980static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
981{
982 struct kvm *kvm = vcpu->kvm;
983
984 switch (msr) {
985 case HV_X64_MSR_GUEST_OS_ID:
986 kvm->arch.hv_guest_os_id = data;
987 /* setting guest os id to zero disables hypercall page */
988 if (!kvm->arch.hv_guest_os_id)
989 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
990 break;
991 case HV_X64_MSR_HYPERCALL: {
992 u64 gfn;
993 unsigned long addr;
994 u8 instructions[4];
995
996 /* if guest os id is not set hypercall should remain disabled */
997 if (!kvm->arch.hv_guest_os_id)
998 break;
999 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1000 kvm->arch.hv_hypercall = data;
1001 break;
1002 }
1003 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1004 addr = gfn_to_hva(kvm, gfn);
1005 if (kvm_is_error_hva(addr))
1006 return 1;
1007 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1008 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
1009 if (copy_to_user((void __user *)addr, instructions, 4))
1010 return 1;
1011 kvm->arch.hv_hypercall = data;
1012 break;
1013 }
1014 default:
1015 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1016 "data 0x%llx\n", msr, data);
1017 return 1;
1018 }
1019 return 0;
1020}
1021
1022static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1023{
10388a07
GN		 1024 switch (msr) {
1025 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1026 unsigned long addr;
55cd8e5a 1027
10388a07
GN		 1028 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1029 vcpu->arch.hv_vapic = data;
1030 break;
1031 }
1032 addr = gfn_to_hva(vcpu->kvm, data >>
1033 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1034 if (kvm_is_error_hva(addr))
1035 return 1;
1036 if (clear_user((void __user *)addr, PAGE_SIZE))
1037 return 1;
1038 vcpu->arch.hv_vapic = data;
1039 break;
1040 }
1041 case HV_X64_MSR_EOI:
1042 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1043 case HV_X64_MSR_ICR:
1044 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1045 case HV_X64_MSR_TPR:
1046 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1047 default:
1048 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1049 "data 0x%llx\n", msr, data);
1050 return 1;
1051 }
1052
1053 return 0;
55cd8e5a
GN		 1054}
1055
15c4a640
CO		 1056int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1057{
1058 switch (msr) {
15c4a640
CO		 1059 case MSR_EFER:
1060 set_efer(vcpu, data);
1061 break;
8f1589d9
AP		 1062 case MSR_K7_HWCR:
1063 data &= ~(u64)0x40; /* ignore flush filter disable */
82494028 1064 data &= ~(u64)0x100; /* ignore ignne emulation enable */
8f1589d9
AP		 1065 if (data != 0) {
1066 pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1067 data);
1068 return 1;
1069 }
15c4a640 1070 break;
f7c6d140
AP		 1071 case MSR_FAM10H_MMIO_CONF_BASE:
1072 if (data != 0) {
1073 pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1074 "0x%llx\n", data);
1075 return 1;
1076 }
15c4a640 1077 break;
c323c0e5 1078 case MSR_AMD64_NB_CFG:
c7ac679c 1079 break;
b5e2fec0
AG		 1080 case MSR_IA32_DEBUGCTLMSR:
1081 if (!data) {
1082 /* We support the non-activated case already */
1083 break;
1084 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1085 /* Values other than LBR and BTF are vendor-specific,
1086 thus reserved and should throw a #GP */
1087 return 1;
1088 }
1089 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1090 __func__, data);
1091 break;
15c4a640
CO		 1092 case MSR_IA32_UCODE_REV:
1093 case MSR_IA32_UCODE_WRITE:
61a6bd67 1094 case MSR_VM_HSAVE_PA:
6098ca93 1095 case MSR_AMD64_PATCH_LOADER:
15c4a640 1096 break;
9ba075a6
AK		 1097 case 0x200 ... 0x2ff:
1098 return set_msr_mtrr(vcpu, msr, data);
15c4a640
CO		 1099 case MSR_IA32_APICBASE:
1100 kvm_set_apic_base(vcpu, data);
1101 break;
0105d1a5
GN		 1102 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1103 return kvm_x2apic_msr_write(vcpu, msr, data);
15c4a640 1104 case MSR_IA32_MISC_ENABLE:
ad312c7c 1105 vcpu->arch.ia32_misc_enable_msr = data;
15c4a640 1106 break;
18068523
GOC		 1107 case MSR_KVM_WALL_CLOCK:
1108 vcpu->kvm->arch.wall_clock = data;
1109 kvm_write_wall_clock(vcpu->kvm, data);
1110 break;
1111 case MSR_KVM_SYSTEM_TIME: {
1112 if (vcpu->arch.time_page) {
1113 kvm_release_page_dirty(vcpu->arch.time_page);
1114 vcpu->arch.time_page = NULL;
1115 }
1116
1117 vcpu->arch.time = data;
1118
1119 /* we verify if the enable bit is set... */
1120 if (!(data & 1))
1121 break;
1122
1123 /* ...but clean it before doing the actual write */
1124 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1125
18068523
GOC		 1126 vcpu->arch.time_page =
1127 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
18068523
GOC		 1128
1129 if (is_error_page(vcpu->arch.time_page)) {
1130 kvm_release_page_clean(vcpu->arch.time_page);
1131 vcpu->arch.time_page = NULL;
1132 }
1133
c8076604 1134 kvm_request_guest_time_update(vcpu);
18068523
GOC		 1135 break;
1136 }
890ca9ae
HY		 1137 case MSR_IA32_MCG_CTL:
1138 case MSR_IA32_MCG_STATUS:
1139 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1140 return set_msr_mce(vcpu, msr, data);
71db6023
AP		 1141
1142 /* Performance counters are not protected by a CPUID bit,
1143 * so we should check all of them in the generic path for the sake of
1144 * cross vendor migration.
1145 * Writing a zero into the event select MSRs disables them,
1146 * which we perfectly emulate ;-). Any other value should be at least
1147 * reported, some guests depend on them.
1148 */
1149 case MSR_P6_EVNTSEL0:
1150 case MSR_P6_EVNTSEL1:
1151 case MSR_K7_EVNTSEL0:
1152 case MSR_K7_EVNTSEL1:
1153 case MSR_K7_EVNTSEL2:
1154 case MSR_K7_EVNTSEL3:
1155 if (data != 0)
1156 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1157 "0x%x data 0x%llx\n", msr, data);
1158 break;
1159 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1160 * so we ignore writes to make it happy.
1161 */
1162 case MSR_P6_PERFCTR0:
1163 case MSR_P6_PERFCTR1:
1164 case MSR_K7_PERFCTR0:
1165 case MSR_K7_PERFCTR1:
1166 case MSR_K7_PERFCTR2:
1167 case MSR_K7_PERFCTR3:
1168 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1169 "0x%x data 0x%llx\n", msr, data);
1170 break;
55cd8e5a
GN		 1171 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1172 if (kvm_hv_msr_partition_wide(msr)) {
1173 int r;
1174 mutex_lock(&vcpu->kvm->lock);
1175 r = set_msr_hyperv_pw(vcpu, msr, data);
1176 mutex_unlock(&vcpu->kvm->lock);
1177 return r;
1178 } else
1179 return set_msr_hyperv(vcpu, msr, data);
1180 break;
15c4a640 1181 default:
ffde22ac
ES		 1182 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1183 return xen_hvm_config(vcpu, data);
ed85c068
AP		 1184 if (!ignore_msrs) {
1185 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1186 msr, data);
1187 return 1;
1188 } else {
1189 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1190 msr, data);
1191 break;
1192 }
15c4a640
CO		 1193 }
1194 return 0;
1195}
1196EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1197
1198
1199/*
1200 * Reads an msr value (of 'msr_index') into 'pdata'.
1201 * Returns 0 on success, non-0 otherwise.
1202 * Assumes vcpu_load() was already called.
1203 */
1204int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1205{
1206 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1207}
1208
9ba075a6
AK		 1209static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1210{
0bed3b56
SY		 1211 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1212
9ba075a6
AK		 1213 if (!msr_mtrr_valid(msr))
1214 return 1;
1215
0bed3b56
SY		 1216 if (msr == MSR_MTRRdefType)
1217 *pdata = vcpu->arch.mtrr_state.def_type +
1218 (vcpu->arch.mtrr_state.enabled << 10);
1219 else if (msr == MSR_MTRRfix64K_00000)
1220 *pdata = p[0];
1221 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1222 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1223 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1224 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1225 else if (msr == MSR_IA32_CR_PAT)
1226 *pdata = vcpu->arch.pat;
1227 else { /* Variable MTRRs */
1228 int idx, is_mtrr_mask;
1229 u64 *pt;
1230
1231 idx = (msr - 0x200) / 2;
1232 is_mtrr_mask = msr - 0x200 - 2 * idx;
1233 if (!is_mtrr_mask)
1234 pt =
1235 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1236 else
1237 pt =
1238 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1239 *pdata = *pt;
1240 }
1241
9ba075a6
AK		 1242 return 0;
1243}
1244
890ca9ae 1245static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
15c4a640
CO		 1246{
1247 u64 data;
890ca9ae
HY		 1248 u64 mcg_cap = vcpu->arch.mcg_cap;
1249 unsigned bank_num = mcg_cap & 0xff;
15c4a640
CO		 1250
1251 switch (msr) {
15c4a640
CO		 1252 case MSR_IA32_P5_MC_ADDR:
1253 case MSR_IA32_P5_MC_TYPE:
890ca9ae
HY		 1254 data = 0;
1255 break;
15c4a640 1256 case MSR_IA32_MCG_CAP:
890ca9ae
HY		 1257 data = vcpu->arch.mcg_cap;
1258 break;
c7ac679c 1259 case MSR_IA32_MCG_CTL:
890ca9ae
HY		 1260 if (!(mcg_cap & MCG_CTL_P))
1261 return 1;
1262 data = vcpu->arch.mcg_ctl;
1263 break;
1264 case MSR_IA32_MCG_STATUS:
1265 data = vcpu->arch.mcg_status;
1266 break;
1267 default:
1268 if (msr >= MSR_IA32_MC0_CTL &&
1269 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1270 u32 offset = msr - MSR_IA32_MC0_CTL;
1271 data = vcpu->arch.mce_banks[offset];
1272 break;
1273 }
1274 return 1;
1275 }
1276 *pdata = data;
1277 return 0;
1278}
1279
55cd8e5a
GN		 1280static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1281{
1282 u64 data = 0;
1283 struct kvm *kvm = vcpu->kvm;
1284
1285 switch (msr) {
1286 case HV_X64_MSR_GUEST_OS_ID:
1287 data = kvm->arch.hv_guest_os_id;
1288 break;
1289 case HV_X64_MSR_HYPERCALL:
1290 data = kvm->arch.hv_hypercall;
1291 break;
1292 default:
1293 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1294 return 1;
1295 }
1296
1297 *pdata = data;
1298 return 0;
1299}
1300
1301static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1302{
1303 u64 data = 0;
1304
1305 switch (msr) {
1306 case HV_X64_MSR_VP_INDEX: {
1307 int r;
1308 struct kvm_vcpu *v;
1309 kvm_for_each_vcpu(r, v, vcpu->kvm)
1310 if (v == vcpu)
1311 data = r;
1312 break;
1313 }
10388a07
GN		 1314 case HV_X64_MSR_EOI:
1315 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1316 case HV_X64_MSR_ICR:
1317 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1318 case HV_X64_MSR_TPR:
1319 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
55cd8e5a
GN		 1320 default:
1321 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1322 return 1;
1323 }
1324 *pdata = data;
1325 return 0;
1326}
1327
890ca9ae
HY		 1328int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1329{
1330 u64 data;
1331
1332 switch (msr) {
890ca9ae 1333 case MSR_IA32_PLATFORM_ID:
15c4a640 1334 case MSR_IA32_UCODE_REV:
15c4a640 1335 case MSR_IA32_EBL_CR_POWERON:
b5e2fec0
AG		 1336 case MSR_IA32_DEBUGCTLMSR:
1337 case MSR_IA32_LASTBRANCHFROMIP:
1338 case MSR_IA32_LASTBRANCHTOIP:
1339 case MSR_IA32_LASTINTFROMIP:
1340 case MSR_IA32_LASTINTTOIP:
60af2ecd
JSR		 1341 case MSR_K8_SYSCFG:
1342 case MSR_K7_HWCR:
61a6bd67 1343 case MSR_VM_HSAVE_PA:
1f3ee616
AS		 1344 case MSR_P6_PERFCTR0:
1345 case MSR_P6_PERFCTR1:
7fe29e0f
AS		 1346 case MSR_P6_EVNTSEL0:
1347 case MSR_P6_EVNTSEL1:
9e699624 1348 case MSR_K7_EVNTSEL0:
1f3ee616 1349 case MSR_K7_PERFCTR0:
1fdbd48c 1350 case MSR_K8_INT_PENDING_MSG:
c323c0e5 1351 case MSR_AMD64_NB_CFG:
f7c6d140 1352 case MSR_FAM10H_MMIO_CONF_BASE:
15c4a640
CO		 1353 data = 0;
1354 break;
9ba075a6
AK		 1355 case MSR_MTRRcap:
1356 data = 0x500 | KVM_NR_VAR_MTRR;
1357 break;
1358 case 0x200 ... 0x2ff:
1359 return get_msr_mtrr(vcpu, msr, pdata);
15c4a640
CO		 1360 case 0xcd: /* fsb frequency */
1361 data = 3;
1362 break;
1363 case MSR_IA32_APICBASE:
1364 data = kvm_get_apic_base(vcpu);
1365 break;
0105d1a5
GN		 1366 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1367 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1368 break;
15c4a640 1369 case MSR_IA32_MISC_ENABLE:
ad312c7c 1370 data = vcpu->arch.ia32_misc_enable_msr;
15c4a640 1371 break;
847f0ad8
AG		 1372 case MSR_IA32_PERF_STATUS:
1373 /* TSC increment by tick */
1374 data = 1000ULL;
1375 /* CPU multiplier */
1376 data |= (((uint64_t)4ULL) << 40);
1377 break;
15c4a640 1378 case MSR_EFER:
f6801dff 1379 data = vcpu->arch.efer;
15c4a640 1380 break;
18068523
GOC		 1381 case MSR_KVM_WALL_CLOCK:
1382 data = vcpu->kvm->arch.wall_clock;
1383 break;
1384 case MSR_KVM_SYSTEM_TIME:
1385 data = vcpu->arch.time;
1386 break;
890ca9ae
HY		 1387 case MSR_IA32_P5_MC_ADDR:
1388 case MSR_IA32_P5_MC_TYPE:
1389 case MSR_IA32_MCG_CAP:
1390 case MSR_IA32_MCG_CTL:
1391 case MSR_IA32_MCG_STATUS:
1392 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1393 return get_msr_mce(vcpu, msr, pdata);
55cd8e5a
GN		 1394 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1395 if (kvm_hv_msr_partition_wide(msr)) {
1396 int r;
1397 mutex_lock(&vcpu->kvm->lock);
1398 r = get_msr_hyperv_pw(vcpu, msr, pdata);
1399 mutex_unlock(&vcpu->kvm->lock);
1400 return r;
1401 } else
1402 return get_msr_hyperv(vcpu, msr, pdata);
1403 break;
15c4a640 1404 default:
ed85c068
AP		 1405 if (!ignore_msrs) {
1406 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
1407 return 1;
1408 } else {
1409 pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
1410 data = 0;
1411 }
1412 break;
15c4a640
CO		 1413 }
1414 *pdata = data;
1415 return 0;
1416}
1417EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1418
313a3dc7
CO		 1419/*
1420 * Read or write a bunch of msrs. All parameters are kernel addresses.
1421 *
1422 * @return number of msrs set successfully.
1423 */
1424static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
1425 struct kvm_msr_entry *entries,
1426 int (*do_msr)(struct kvm_vcpu *vcpu,
1427 unsigned index, u64 *data))
1428{
f656ce01 1429 int i, idx;
313a3dc7
CO		 1430
1431 vcpu_load(vcpu);
1432
f656ce01 1433 idx = srcu_read_lock(&vcpu->kvm->srcu);
313a3dc7
CO		 1434 for (i = 0; i < msrs->nmsrs; ++i)
1435 if (do_msr(vcpu, entries[i].index, &entries[i].data))
1436 break;
f656ce01 1437 srcu_read_unlock(&vcpu->kvm->srcu, idx);
313a3dc7
CO		 1438
1439 vcpu_put(vcpu);
1440
1441 return i;
1442}
1443
1444/*
1445 * Read or write a bunch of msrs. Parameters are user addresses.
1446 *
1447 * @return number of msrs set successfully.
1448 */
1449static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
1450 int (*do_msr)(struct kvm_vcpu *vcpu,
1451 unsigned index, u64 *data),
1452 int writeback)
1453{
1454 struct kvm_msrs msrs;
1455 struct kvm_msr_entry *entries;
1456 int r, n;
1457 unsigned size;
1458
1459 r = -EFAULT;
1460 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
1461 goto out;
1462
1463 r = -E2BIG;
1464 if (msrs.nmsrs >= MAX_IO_MSRS)
1465 goto out;
1466
1467 r = -ENOMEM;
1468 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
1469 entries = vmalloc(size);
1470 if (!entries)
1471 goto out;
1472
1473 r = -EFAULT;
1474 if (copy_from_user(entries, user_msrs->entries, size))
1475 goto out_free;
1476
1477 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
1478 if (r < 0)
1479 goto out_free;
1480
1481 r = -EFAULT;
1482 if (writeback && copy_to_user(user_msrs->entries, entries, size))
1483 goto out_free;
1484
1485 r = n;
1486
1487out_free:
1488 vfree(entries);
1489out:
1490 return r;
1491}
1492
018d00d2
ZX		 1493int kvm_dev_ioctl_check_extension(long ext)
1494{
1495 int r;
1496
1497 switch (ext) {
1498 case KVM_CAP_IRQCHIP:
1499 case KVM_CAP_HLT:
1500 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
018d00d2 1501 case KVM_CAP_SET_TSS_ADDR:
07716717 1502 case KVM_CAP_EXT_CPUID:
c8076604 1503 case KVM_CAP_CLOCKSOURCE:
7837699f 1504 case KVM_CAP_PIT:
a28e4f5a 1505 case KVM_CAP_NOP_IO_DELAY:
62d9f0db 1506 case KVM_CAP_MP_STATE:
ed848624 1507 case KVM_CAP_SYNC_MMU:
52d939a0 1508 case KVM_CAP_REINJECT_CONTROL:
4925663a 1509 case KVM_CAP_IRQ_INJECT_STATUS:
e56d532f 1510 case KVM_CAP_ASSIGN_DEV_IRQ:
721eecbf 1511 case KVM_CAP_IRQFD:
d34e6b17 1512 case KVM_CAP_IOEVENTFD:
c5ff41ce 1513 case KVM_CAP_PIT2:
e9f42757 1514 case KVM_CAP_PIT_STATE2:
b927a3ce 1515 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
ffde22ac 1516 case KVM_CAP_XEN_HVM:
afbcf7ab 1517 case KVM_CAP_ADJUST_CLOCK:
3cfc3092 1518 case KVM_CAP_VCPU_EVENTS:
55cd8e5a 1519 case KVM_CAP_HYPERV:
10388a07 1520 case KVM_CAP_HYPERV_VAPIC:
c25bc163 1521 case KVM_CAP_HYPERV_SPIN:
ab9f4ecb 1522 case KVM_CAP_PCI_SEGMENT:
a1efbe77 1523 case KVM_CAP_DEBUGREGS:
d2be1651 1524 case KVM_CAP_X86_ROBUST_SINGLESTEP:
018d00d2
ZX		 1525 r = 1;
1526 break;
542472b5
LV		 1527 case KVM_CAP_COALESCED_MMIO:
1528 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
1529 break;
774ead3a
AK		 1530 case KVM_CAP_VAPIC:
1531 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
1532 break;
f725230a
AK		 1533 case KVM_CAP_NR_VCPUS:
1534 r = KVM_MAX_VCPUS;
1535 break;
a988b910
AK		 1536 case KVM_CAP_NR_MEMSLOTS:
1537 r = KVM_MEMORY_SLOTS;
1538 break;
a68a6a72
MT		 1539 case KVM_CAP_PV_MMU: /* obsolete */
1540 r = 0;
2f333bcb 1541 break;
62c476c7 1542 case KVM_CAP_IOMMU:
19de40a8 1543 r = iommu_found();
62c476c7 1544 break;
890ca9ae
HY		 1545 case KVM_CAP_MCE:
1546 r = KVM_MAX_MCE_BANKS;
1547 break;
018d00d2
ZX		 1548 default:
1549 r = 0;
1550 break;
1551 }
1552 return r;
1553
1554}
1555
043405e1
CO		 1556long kvm_arch_dev_ioctl(struct file *filp,
1557 unsigned int ioctl, unsigned long arg)
1558{
1559 void __user *argp = (void __user *)arg;
1560 long r;
1561
1562 switch (ioctl) {
1563 case KVM_GET_MSR_INDEX_LIST: {
1564 struct kvm_msr_list __user *user_msr_list = argp;
1565 struct kvm_msr_list msr_list;
1566 unsigned n;
1567
1568 r = -EFAULT;
1569 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
1570 goto out;
1571 n = msr_list.nmsrs;
1572 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
1573 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
1574 goto out;
1575 r = -E2BIG;
e125e7b6 1576 if (n < msr_list.nmsrs)
043405e1
CO		 1577 goto out;
1578 r = -EFAULT;
1579 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
1580 num_msrs_to_save * sizeof(u32)))
1581 goto out;
e125e7b6 1582 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
043405e1
CO		 1583 &emulated_msrs,
1584 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
1585 goto out;
1586 r = 0;
1587 break;
1588 }
674eea0f
AK		 1589 case KVM_GET_SUPPORTED_CPUID: {
1590 struct kvm_cpuid2 __user *cpuid_arg = argp;
1591 struct kvm_cpuid2 cpuid;
1592
1593 r = -EFAULT;
1594 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1595 goto out;
1596 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
19355475 1597 cpuid_arg->entries);
674eea0f
AK		 1598 if (r)
1599 goto out;
1600
1601 r = -EFAULT;
1602 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1603 goto out;
1604 r = 0;
1605 break;
1606 }
890ca9ae
HY		 1607 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
1608 u64 mce_cap;
1609
1610 mce_cap = KVM_MCE_CAP_SUPPORTED;
1611 r = -EFAULT;
1612 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
1613 goto out;
1614 r = 0;
1615 break;
1616 }
043405e1
CO		 1617 default:
1618 r = -EINVAL;
1619 }
1620out:
1621 return r;
1622}
1623
313a3dc7
CO		 1624void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1625{
1626 kvm_x86_ops->vcpu_load(vcpu, cpu);
6b7d7e76
ZA		 1627 if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) {
1628 unsigned long khz = cpufreq_quick_get(cpu);
1629 if (!khz)
1630 khz = tsc_khz;
1631 per_cpu(cpu_tsc_khz, cpu) = khz;
1632 }
c8076604 1633 kvm_request_guest_time_update(vcpu);
313a3dc7
CO		 1634}
1635
1636void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1637{
9327fd11 1638 kvm_put_guest_fpu(vcpu);
02daab21 1639 kvm_x86_ops->vcpu_put(vcpu);
313a3dc7
CO		 1640}
1641
07716717 1642static int is_efer_nx(void)
313a3dc7 1643{
e286e86e 1644 unsigned long long efer = 0;
313a3dc7 1645
e286e86e 1646 rdmsrl_safe(MSR_EFER, &efer);
07716717
DK		 1647 return efer & EFER_NX;
1648}
1649
1650static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
1651{
1652 int i;
1653 struct kvm_cpuid_entry2 *e, *entry;
1654
313a3dc7 1655 entry = NULL;
ad312c7c
ZX		 1656 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
1657 e = &vcpu->arch.cpuid_entries[i];
313a3dc7
CO		 1658 if (e->function == 0x80000001) {
1659 entry = e;
1660 break;
1661 }
1662 }
07716717 1663 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
313a3dc7
CO		 1664 entry->edx &= ~(1 << 20);
1665 printk(KERN_INFO "kvm: guest NX capability removed\n");
1666 }
1667}
1668
07716717 1669/* when an old userspace process fills a new kernel module */
313a3dc7
CO		 1670static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
1671 struct kvm_cpuid *cpuid,
1672 struct kvm_cpuid_entry __user *entries)
07716717
DK		 1673{
1674 int r, i;
1675 struct kvm_cpuid_entry *cpuid_entries;
1676
1677 r = -E2BIG;
1678 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1679 goto out;
1680 r = -ENOMEM;
1681 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
1682 if (!cpuid_entries)
1683 goto out;
1684 r = -EFAULT;
1685 if (copy_from_user(cpuid_entries, entries,
1686 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
1687 goto out_free;
1688 for (i = 0; i < cpuid->nent; i++) {
ad312c7c
ZX		 1689 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
1690 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
1691 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
1692 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
1693 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
1694 vcpu->arch.cpuid_entries[i].index = 0;
1695 vcpu->arch.cpuid_entries[i].flags = 0;
1696 vcpu->arch.cpuid_entries[i].padding[0] = 0;
1697 vcpu->arch.cpuid_entries[i].padding[1] = 0;
1698 vcpu->arch.cpuid_entries[i].padding[2] = 0;
1699 }
1700 vcpu->arch.cpuid_nent = cpuid->nent;
07716717
DK		 1701 cpuid_fix_nx_cap(vcpu);
1702 r = 0;
fc61b800 1703 kvm_apic_set_version(vcpu);
0e851880 1704 kvm_x86_ops->cpuid_update(vcpu);
07716717
DK		 1705
1706out_free:
1707 vfree(cpuid_entries);
1708out:
1709 return r;
1710}
1711
1712static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
19355475
AS		 1713 struct kvm_cpuid2 *cpuid,
1714 struct kvm_cpuid_entry2 __user *entries)
313a3dc7
CO		 1715{
1716 int r;
1717
1718 r = -E2BIG;
1719 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1720 goto out;
1721 r = -EFAULT;
ad312c7c 1722 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
07716717 1723 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
313a3dc7 1724 goto out;
ad312c7c 1725 vcpu->arch.cpuid_nent = cpuid->nent;
fc61b800 1726 kvm_apic_set_version(vcpu);
0e851880 1727 kvm_x86_ops->cpuid_update(vcpu);
313a3dc7
CO		 1728 return 0;
1729
1730out:
1731 return r;
1732}
1733
07716717 1734static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
19355475
AS		 1735 struct kvm_cpuid2 *cpuid,
1736 struct kvm_cpuid_entry2 __user *entries)
07716717
DK		 1737{
1738 int r;
1739
1740 r = -E2BIG;
ad312c7c 1741 if (cpuid->nent < vcpu->arch.cpuid_nent)
07716717
DK		 1742 goto out;
1743 r = -EFAULT;
ad312c7c 1744 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
19355475 1745 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
07716717
DK		 1746 goto out;
1747 return 0;
1748
1749out:
ad312c7c 1750 cpuid->nent = vcpu->arch.cpuid_nent;
07716717
DK		 1751 return r;
1752}
1753
07716717 1754static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
19355475 1755 u32 index)
07716717
DK		 1756{
1757 entry->function = function;
1758 entry->index = index;
1759 cpuid_count(entry->function, entry->index,
19355475 1760 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
07716717
DK		 1761 entry->flags = 0;
1762}
1763
7faa4ee1
AK		 1764#define F(x) bit(X86_FEATURE_##x)
1765
07716717
DK		 1766static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1767 u32 index, int *nent, int maxnent)
1768{
7faa4ee1 1769 unsigned f_nx = is_efer_nx() ? F(NX) : 0;
07716717 1770#ifdef CONFIG_X86_64
17cc3935
SY		 1771 unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL)
1772 ? F(GBPAGES) : 0;
7faa4ee1
AK		 1773 unsigned f_lm = F(LM);
1774#else
17cc3935 1775 unsigned f_gbpages = 0;
7faa4ee1 1776 unsigned f_lm = 0;
07716717 1777#endif
4e47c7a6 1778 unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
7faa4ee1
AK		 1779
1780 /* cpuid 1.edx */
1781 const u32 kvm_supported_word0_x86_features =
1782 F(FPU) | F(VME) | F(DE) | F(PSE) |
1783 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1784 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
1785 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1786 F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) |
1787 0 /* Reserved, DS, ACPI */ | F(MMX) |
1788 F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
1789 0 /* HTT, TM, Reserved, PBE */;
1790 /* cpuid 0x80000001.edx */
1791 const u32 kvm_supported_word1_x86_features =
1792 F(FPU) | F(VME) | F(DE) | F(PSE) |
1793 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1794 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) |
1795 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1796 F(PAT) | F(PSE36) | 0 /* Reserved */ |
1797 f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) |
4e47c7a6 1798 F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp |
7faa4ee1
AK		 1799 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW);
1800 /* cpuid 1.ecx */
1801 const u32 kvm_supported_word4_x86_features =
d149c731
AK		 1802 F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ |
1803 0 /* DS-CPL, VMX, SMX, EST */ |
1804 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
1805 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ |
1806 0 /* Reserved, DCA */ | F(XMM4_1) |
0105d1a5 1807 F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
d149c731 1808 0 /* Reserved, XSAVE, OSXSAVE */;
7faa4ee1 1809 /* cpuid 0x80000001.ecx */
07716717 1810 const u32 kvm_supported_word6_x86_features =
7faa4ee1
AK		 1811 F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ |
1812 F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
1813 F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) |
1814 0 /* SKINIT */ | 0 /* WDT */;
07716717 1815
19355475 1816 /* all calls to cpuid_count() should be made on the same cpu */
07716717
DK		 1817 get_cpu();
1818 do_cpuid_1_ent(entry, function, index);
1819 ++*nent;
1820
1821 switch (function) {
1822 case 0:
1823 entry->eax = min(entry->eax, (u32)0xb);
1824 break;
1825 case 1:
1826 entry->edx &= kvm_supported_word0_x86_features;
7faa4ee1 1827 entry->ecx &= kvm_supported_word4_x86_features;
0d1de2d9
GN		 1828 /* we support x2apic emulation even if host does not support
1829 * it since we emulate x2apic in software */
1830 entry->ecx |= F(X2APIC);
07716717
DK		 1831 break;
1832 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1833 * may return different values. This forces us to get_cpu() before
1834 * issuing the first command, and also to emulate this annoying behavior
1835 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1836 case 2: {
1837 int t, times = entry->eax & 0xff;
1838
1839 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
0fdf8e59 1840 entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
07716717
DK		 1841 for (t = 1; t < times && *nent < maxnent; ++t) {
1842 do_cpuid_1_ent(&entry[t], function, 0);
1843 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1844 ++*nent;
1845 }
1846 break;
1847 }
1848 /* function 4 and 0xb have additional index. */
1849 case 4: {
14af3f3c 1850 int i, cache_type;
07716717
DK		 1851
1852 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1853 /* read more entries until cache_type is zero */
14af3f3c
HH		 1854 for (i = 1; *nent < maxnent; ++i) {
1855 cache_type = entry[i - 1].eax & 0x1f;
07716717
DK		 1856 if (!cache_type)
1857 break;
14af3f3c
HH		 1858 do_cpuid_1_ent(&entry[i], function, i);
1859 entry[i].flags |=
07716717
DK		 1860 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1861 ++*nent;
1862 }
1863 break;
1864 }
1865 case 0xb: {
14af3f3c 1866 int i, level_type;
07716717
DK		 1867
1868 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1869 /* read more entries until level_type is zero */
14af3f3c 1870 for (i = 1; *nent < maxnent; ++i) {
0853d2c1 1871 level_type = entry[i - 1].ecx & 0xff00;
07716717
DK		 1872 if (!level_type)
1873 break;
14af3f3c
HH		 1874 do_cpuid_1_ent(&entry[i], function, i);
1875 entry[i].flags |=
07716717
DK		 1876 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1877 ++*nent;
1878 }
1879 break;
1880 }
1881 case 0x80000000:
1882 entry->eax = min(entry->eax, 0x8000001a);
1883 break;
1884 case 0x80000001:
1885 entry->edx &= kvm_supported_word1_x86_features;
1886 entry->ecx &= kvm_supported_word6_x86_features;
1887 break;
1888 }
1889 put_cpu();
1890}
1891
7faa4ee1
AK		 1892#undef F
1893
674eea0f 1894static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
19355475 1895 struct kvm_cpuid_entry2 __user *entries)
07716717
DK		 1896{
1897 struct kvm_cpuid_entry2 *cpuid_entries;
1898 int limit, nent = 0, r = -E2BIG;
1899 u32 func;
1900
1901 if (cpuid->nent < 1)
1902 goto out;
6a544355
AK		 1903 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1904 cpuid->nent = KVM_MAX_CPUID_ENTRIES;
07716717
DK		 1905 r = -ENOMEM;
1906 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
1907 if (!cpuid_entries)
1908 goto out;
1909
1910 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
1911 limit = cpuid_entries[0].eax;
1912 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
1913 do_cpuid_ent(&cpuid_entries[nent], func, 0,
19355475 1914 &nent, cpuid->nent);
07716717
DK		 1915 r = -E2BIG;
1916 if (nent >= cpuid->nent)
1917 goto out_free;
1918
1919 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
1920 limit = cpuid_entries[nent - 1].eax;
1921 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
1922 do_cpuid_ent(&cpuid_entries[nent], func, 0,
19355475 1923 &nent, cpuid->nent);
cb007648
MM		 1924 r = -E2BIG;
1925 if (nent >= cpuid->nent)
1926 goto out_free;
1927
07716717
DK		 1928 r = -EFAULT;
1929 if (copy_to_user(entries, cpuid_entries,
19355475 1930 nent * sizeof(struct kvm_cpuid_entry2)))
07716717
DK		 1931 goto out_free;
1932 cpuid->nent = nent;
1933 r = 0;
1934
1935out_free:
1936 vfree(cpuid_entries);
1937out:
1938 return r;
1939}
1940
313a3dc7
CO		 1941static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
1942 struct kvm_lapic_state *s)
1943{
1944 vcpu_load(vcpu);
ad312c7c 1945 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
313a3dc7
CO		 1946 vcpu_put(vcpu);
1947
1948 return 0;
1949}
1950
1951static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
1952 struct kvm_lapic_state *s)
1953{
1954 vcpu_load(vcpu);
ad312c7c 1955 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
313a3dc7 1956 kvm_apic_post_state_restore(vcpu);
cb142eb7 1957 update_cr8_intercept(vcpu);
313a3dc7
CO		 1958 vcpu_put(vcpu);
1959
1960 return 0;
1961}
1962
f77bc6a4
ZX		 1963static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
1964 struct kvm_interrupt *irq)
1965{
1966 if (irq->irq < 0 || irq->irq >= 256)
1967 return -EINVAL;
1968 if (irqchip_in_kernel(vcpu->kvm))
1969 return -ENXIO;
1970 vcpu_load(vcpu);
1971
66fd3f7f 1972 kvm_queue_interrupt(vcpu, irq->irq, false);
f77bc6a4
ZX		 1973
1974 vcpu_put(vcpu);
1975
1976 return 0;
1977}
1978
c4abb7c9
JK		 1979static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
1980{
1981 vcpu_load(vcpu);
1982 kvm_inject_nmi(vcpu);
1983 vcpu_put(vcpu);
1984
1985 return 0;
1986}
1987
b209749f
AK		 1988static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
1989 struct kvm_tpr_access_ctl *tac)
1990{
1991 if (tac->flags)
1992 return -EINVAL;
1993 vcpu->arch.tpr_access_reporting = !!tac->enabled;
1994 return 0;
1995}
1996
890ca9ae
HY		 1997static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
1998 u64 mcg_cap)
1999{
2000 int r;
2001 unsigned bank_num = mcg_cap & 0xff, bank;
2002
2003 r = -EINVAL;
a9e38c3e 2004 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
890ca9ae
HY		 2005 goto out;
2006 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2007 goto out;
2008 r = 0;
2009 vcpu->arch.mcg_cap = mcg_cap;
2010 /* Init IA32_MCG_CTL to all 1s */
2011 if (mcg_cap & MCG_CTL_P)
2012 vcpu->arch.mcg_ctl = ~(u64)0;
2013 /* Init IA32_MCi_CTL to all 1s */
2014 for (bank = 0; bank < bank_num; bank++)
2015 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2016out:
2017 return r;
2018}
2019
2020static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2021 struct kvm_x86_mce *mce)
2022{
2023 u64 mcg_cap = vcpu->arch.mcg_cap;
2024 unsigned bank_num = mcg_cap & 0xff;
2025 u64 *banks = vcpu->arch.mce_banks;
2026
2027 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2028 return -EINVAL;
2029 /*
2030 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2031 * reporting is disabled
2032 */
2033 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2034 vcpu->arch.mcg_ctl != ~(u64)0)
2035 return 0;
2036 banks += 4 * mce->bank;
2037 /*
2038 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2039 * reporting is disabled for the bank
2040 */
2041 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2042 return 0;
2043 if (mce->status & MCI_STATUS_UC) {
2044 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
fc78f519 2045 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
890ca9ae
HY		 2046 printk(KERN_DEBUG "kvm: set_mce: "
2047 "injects mce exception while "
2048 "previous one is in progress!\n");
2049 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
2050 return 0;
2051 }
2052 if (banks[1] & MCI_STATUS_VAL)
2053 mce->status |= MCI_STATUS_OVER;
2054 banks[2] = mce->addr;
2055 banks[3] = mce->misc;
2056 vcpu->arch.mcg_status = mce->mcg_status;
2057 banks[1] = mce->status;
2058 kvm_queue_exception(vcpu, MC_VECTOR);
2059 } else if (!(banks[1] & MCI_STATUS_VAL)
2060 || !(banks[1] & MCI_STATUS_UC)) {
2061 if (banks[1] & MCI_STATUS_VAL)
2062 mce->status |= MCI_STATUS_OVER;
2063 banks[2] = mce->addr;
2064 banks[3] = mce->misc;
2065 banks[1] = mce->status;
2066 } else
2067 banks[1] |= MCI_STATUS_OVER;
2068 return 0;
2069}
2070
3cfc3092
JK		 2071static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2072 struct kvm_vcpu_events *events)
2073{
2074 vcpu_load(vcpu);
2075
03b82a30
JK		 2076 events->exception.injected =
2077 vcpu->arch.exception.pending &&
2078 !kvm_exception_is_soft(vcpu->arch.exception.nr);
3cfc3092
JK		 2079 events->exception.nr = vcpu->arch.exception.nr;
2080 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
2081 events->exception.error_code = vcpu->arch.exception.error_code;
2082
03b82a30
JK		 2083 events->interrupt.injected =
2084 vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
3cfc3092 2085 events->interrupt.nr = vcpu->arch.interrupt.nr;
03b82a30 2086 events->interrupt.soft = 0;
48005f64
JK		 2087 events->interrupt.shadow =
2088 kvm_x86_ops->get_interrupt_shadow(vcpu,
2089 KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
3cfc3092
JK		 2090
2091 events->nmi.injected = vcpu->arch.nmi_injected;
2092 events->nmi.pending = vcpu->arch.nmi_pending;
2093 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
2094
2095 events->sipi_vector = vcpu->arch.sipi_vector;
2096
dab4b911 2097 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
48005f64
JK		 2098 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2099 | KVM_VCPUEVENT_VALID_SHADOW);
3cfc3092
JK		 2100
2101 vcpu_put(vcpu);
2102}
2103
2104static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2105 struct kvm_vcpu_events *events)
2106{
dab4b911 2107 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
48005f64
JK		 2108 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2109 | KVM_VCPUEVENT_VALID_SHADOW))
3cfc3092
JK		 2110 return -EINVAL;
2111
2112 vcpu_load(vcpu);
2113
2114 vcpu->arch.exception.pending = events->exception.injected;
2115 vcpu->arch.exception.nr = events->exception.nr;
2116 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2117 vcpu->arch.exception.error_code = events->exception.error_code;
2118
2119 vcpu->arch.interrupt.pending = events->interrupt.injected;
2120 vcpu->arch.interrupt.nr = events->interrupt.nr;
2121 vcpu->arch.interrupt.soft = events->interrupt.soft;
2122 if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm))
2123 kvm_pic_clear_isr_ack(vcpu->kvm);
48005f64
JK		 2124 if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
2125 kvm_x86_ops->set_interrupt_shadow(vcpu,
2126 events->interrupt.shadow);
3cfc3092
JK		 2127
2128 vcpu->arch.nmi_injected = events->nmi.injected;
dab4b911
JK		 2129 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2130 vcpu->arch.nmi_pending = events->nmi.pending;
3cfc3092
JK		 2131 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2132
dab4b911
JK		 2133 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2134 vcpu->arch.sipi_vector = events->sipi_vector;
3cfc3092
JK		 2135
2136 vcpu_put(vcpu);
2137
2138 return 0;
2139}
2140
a1efbe77
JK		 2141static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
2142 struct kvm_debugregs *dbgregs)
2143{
2144 vcpu_load(vcpu);
2145
2146 memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
2147 dbgregs->dr6 = vcpu->arch.dr6;
2148 dbgregs->dr7 = vcpu->arch.dr7;
2149 dbgregs->flags = 0;
2150
2151 vcpu_put(vcpu);
2152}
2153
2154static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
2155 struct kvm_debugregs *dbgregs)
2156{
2157 if (dbgregs->flags)
2158 return -EINVAL;
2159
2160 vcpu_load(vcpu);
2161
2162 memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
2163 vcpu->arch.dr6 = dbgregs->dr6;
2164 vcpu->arch.dr7 = dbgregs->dr7;
2165
2166 vcpu_put(vcpu);
2167
2168 return 0;
2169}
2170
313a3dc7
CO		 2171long kvm_arch_vcpu_ioctl(struct file *filp,
2172 unsigned int ioctl, unsigned long arg)
2173{
2174 struct kvm_vcpu *vcpu = filp->private_data;
2175 void __user *argp = (void __user *)arg;
2176 int r;
b772ff36 2177 struct kvm_lapic_state *lapic = NULL;
313a3dc7
CO		 2178
2179 switch (ioctl) {
2180 case KVM_GET_LAPIC: {
2204ae3c
MT		 2181 r = -EINVAL;
2182 if (!vcpu->arch.apic)
2183 goto out;
b772ff36 2184 lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
313a3dc7 2185
b772ff36
DH		 2186 r = -ENOMEM;
2187 if (!lapic)
2188 goto out;
2189 r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic);
313a3dc7
CO		 2190 if (r)
2191 goto out;
2192 r = -EFAULT;
b772ff36 2193 if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state)))
313a3dc7
CO		 2194 goto out;
2195 r = 0;
2196 break;
2197 }
2198 case KVM_SET_LAPIC: {
2204ae3c
MT		 2199 r = -EINVAL;
2200 if (!vcpu->arch.apic)
2201 goto out;
b772ff36
DH		 2202 lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2203 r = -ENOMEM;
2204 if (!lapic)
2205 goto out;
313a3dc7 2206 r = -EFAULT;
b772ff36 2207 if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state)))
313a3dc7 2208 goto out;
b772ff36 2209 r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic);
313a3dc7
CO		 2210 if (r)
2211 goto out;
2212 r = 0;
2213 break;
2214 }
f77bc6a4
ZX		 2215 case KVM_INTERRUPT: {
2216 struct kvm_interrupt irq;
2217
2218 r = -EFAULT;
2219 if (copy_from_user(&irq, argp, sizeof irq))
2220 goto out;
2221 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2222 if (r)
2223 goto out;
2224 r = 0;
2225 break;
2226 }
c4abb7c9
JK		 2227 case KVM_NMI: {
2228 r = kvm_vcpu_ioctl_nmi(vcpu);
2229 if (r)
2230 goto out;
2231 r = 0;
2232 break;
2233 }
313a3dc7
CO		 2234 case KVM_SET_CPUID: {
2235 struct kvm_cpuid __user *cpuid_arg = argp;
2236 struct kvm_cpuid cpuid;
2237
2238 r = -EFAULT;
2239 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2240 goto out;
2241 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2242 if (r)
2243 goto out;
2244 break;
2245 }
07716717
DK		 2246 case KVM_SET_CPUID2: {
2247 struct kvm_cpuid2 __user *cpuid_arg = argp;
2248 struct kvm_cpuid2 cpuid;
2249
2250 r = -EFAULT;
2251 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2252 goto out;
2253 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
19355475 2254 cpuid_arg->entries);
07716717
DK		 2255 if (r)
2256 goto out;
2257 break;
2258 }
2259 case KVM_GET_CPUID2: {
2260 struct kvm_cpuid2 __user *cpuid_arg = argp;
2261 struct kvm_cpuid2 cpuid;
2262
2263 r = -EFAULT;
2264 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2265 goto out;
2266 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
19355475 2267 cpuid_arg->entries);
07716717
DK		 2268 if (r)
2269 goto out;
2270 r = -EFAULT;
2271 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2272 goto out;
2273 r = 0;
2274 break;
2275 }
313a3dc7
CO		 2276 case KVM_GET_MSRS:
2277 r = msr_io(vcpu, argp, kvm_get_msr, 1);
2278 break;
2279 case KVM_SET_MSRS:
2280 r = msr_io(vcpu, argp, do_set_msr, 0);
2281 break;
b209749f
AK		 2282 case KVM_TPR_ACCESS_REPORTING: {
2283 struct kvm_tpr_access_ctl tac;
2284
2285 r = -EFAULT;
2286 if (copy_from_user(&tac, argp, sizeof tac))
2287 goto out;
2288 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
2289 if (r)
2290 goto out;
2291 r = -EFAULT;
2292 if (copy_to_user(argp, &tac, sizeof tac))
2293 goto out;
2294 r = 0;
2295 break;
2296 };
b93463aa
AK		 2297 case KVM_SET_VAPIC_ADDR: {
2298 struct kvm_vapic_addr va;
2299
2300 r = -EINVAL;
2301 if (!irqchip_in_kernel(vcpu->kvm))
2302 goto out;
2303 r = -EFAULT;
2304 if (copy_from_user(&va, argp, sizeof va))
2305 goto out;
2306 r = 0;
2307 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
2308 break;
2309 }
890ca9ae
HY		 2310 case KVM_X86_SETUP_MCE: {
2311 u64 mcg_cap;
2312
2313 r = -EFAULT;
2314 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
2315 goto out;
2316 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
2317 break;
2318 }
2319 case KVM_X86_SET_MCE: {
2320 struct kvm_x86_mce mce;
2321
2322 r = -EFAULT;
2323 if (copy_from_user(&mce, argp, sizeof mce))
2324 goto out;
2325 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
2326 break;
2327 }
3cfc3092
JK		 2328 case KVM_GET_VCPU_EVENTS: {
2329 struct kvm_vcpu_events events;
2330
2331 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
2332
2333 r = -EFAULT;
2334 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
2335 break;
2336 r = 0;
2337 break;
2338 }
2339 case KVM_SET_VCPU_EVENTS: {
2340 struct kvm_vcpu_events events;
2341
2342 r = -EFAULT;
2343 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
2344 break;
2345
2346 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
2347 break;
2348 }
a1efbe77
JK		 2349 case KVM_GET_DEBUGREGS: {
2350 struct kvm_debugregs dbgregs;
2351
2352 kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
2353
2354 r = -EFAULT;
2355 if (copy_to_user(argp, &dbgregs,
2356 sizeof(struct kvm_debugregs)))
2357 break;
2358 r = 0;
2359 break;
2360 }
2361 case KVM_SET_DEBUGREGS: {
2362 struct kvm_debugregs dbgregs;
2363
2364 r = -EFAULT;
2365 if (copy_from_user(&dbgregs, argp,
2366 sizeof(struct kvm_debugregs)))
2367 break;
2368
2369 r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
2370 break;
2371 }
313a3dc7
CO		 2372 default:
2373 r = -EINVAL;
2374 }
2375out:
7a6ce84c 2376 kfree(lapic);
313a3dc7
CO		 2377 return r;
2378}
2379
1fe779f8
CO		 2380static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
2381{
2382 int ret;
2383
2384 if (addr > (unsigned int)(-3 * PAGE_SIZE))
2385 return -1;
2386 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
2387 return ret;
2388}
2389
b927a3ce
SY		 2390static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
2391 u64 ident_addr)
2392{
2393 kvm->arch.ept_identity_map_addr = ident_addr;
2394 return 0;
2395}
2396
1fe779f8
CO		 2397static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
2398 u32 kvm_nr_mmu_pages)
2399{
2400 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
2401 return -EINVAL;
2402
79fac95e 2403 mutex_lock(&kvm->slots_lock);
7c8a83b7 2404 spin_lock(&kvm->mmu_lock);
1fe779f8
CO		 2405
2406 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
f05e70ac 2407 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
1fe779f8 2408
7c8a83b7 2409 spin_unlock(&kvm->mmu_lock);
79fac95e 2410 mutex_unlock(&kvm->slots_lock);
1fe779f8
CO		 2411 return 0;
2412}
2413
2414static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
2415{
f05e70ac 2416 return kvm->arch.n_alloc_mmu_pages;
1fe779f8
CO		 2417}
2418
a983fb23
MT		 2419gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn)
2420{
2421 int i;
2422 struct kvm_mem_alias *alias;
2423 struct kvm_mem_aliases *aliases;
2424
2425 aliases = rcu_dereference(kvm->arch.aliases);
2426
2427 for (i = 0; i < aliases->naliases; ++i) {
2428 alias = &aliases->aliases[i];
2429 if (alias->flags & KVM_ALIAS_INVALID)
2430 continue;
2431 if (gfn >= alias->base_gfn
2432 && gfn < alias->base_gfn + alias->npages)
2433 return alias->target_gfn + gfn - alias->base_gfn;
2434 }
2435 return gfn;
2436}
2437
e9f85cde
ZX		 2438gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
2439{
2440 int i;
2441 struct kvm_mem_alias *alias;
a983fb23
MT		 2442 struct kvm_mem_aliases *aliases;
2443
2444 aliases = rcu_dereference(kvm->arch.aliases);
e9f85cde 2445
fef9cce0
MT		 2446 for (i = 0; i < aliases->naliases; ++i) {
2447 alias = &aliases->aliases[i];
e9f85cde
ZX		 2448 if (gfn >= alias->base_gfn
2449 && gfn < alias->base_gfn + alias->npages)
2450 return alias->target_gfn + gfn - alias->base_gfn;
2451 }
2452 return gfn;
2453}
2454
1fe779f8
CO		 2455/*
2456 * Set a new alias region. Aliases map a portion of physical memory into
2457 * another portion. This is useful for memory windows, for example the PC
2458 * VGA region.
2459 */
2460static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
2461 struct kvm_memory_alias *alias)
2462{
2463 int r, n;
2464 struct kvm_mem_alias *p;
a983fb23 2465 struct kvm_mem_aliases *aliases, *old_aliases;
1fe779f8
CO		 2466
2467 r = -EINVAL;
2468 /* General sanity checks */
2469 if (alias->memory_size & (PAGE_SIZE - 1))
2470 goto out;
2471 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
2472 goto out;
2473 if (alias->slot >= KVM_ALIAS_SLOTS)
2474 goto out;
2475 if (alias->guest_phys_addr + alias->memory_size
2476 < alias->guest_phys_addr)
2477 goto out;
2478 if (alias->target_phys_addr + alias->memory_size
2479 < alias->target_phys_addr)
2480 goto out;
2481
a983fb23
MT		 2482 r = -ENOMEM;
2483 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2484 if (!aliases)
2485 goto out;
2486
79fac95e 2487 mutex_lock(&kvm->slots_lock);
1fe779f8 2488
a983fb23
MT		 2489 /* invalidate any gfn reference in case of deletion/shrinking */
2490 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2491 aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID;
2492 old_aliases = kvm->arch.aliases;
2493 rcu_assign_pointer(kvm->arch.aliases, aliases);
2494 synchronize_srcu_expedited(&kvm->srcu);
2495 kvm_mmu_zap_all(kvm);
2496 kfree(old_aliases);
2497
2498 r = -ENOMEM;
2499 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2500 if (!aliases)
2501 goto out_unlock;
2502
2503 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
fef9cce0
MT		 2504
2505 p = &aliases->aliases[alias->slot];
1fe779f8
CO		 2506 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
2507 p->npages = alias->memory_size >> PAGE_SHIFT;
2508 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
a983fb23 2509 p->flags &= ~(KVM_ALIAS_INVALID);
1fe779f8
CO		 2510
2511 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
fef9cce0 2512 if (aliases->aliases[n - 1].npages)
1fe779f8 2513 break;
fef9cce0 2514 aliases->naliases = n;
1fe779f8 2515
a983fb23
MT		 2516 old_aliases = kvm->arch.aliases;
2517 rcu_assign_pointer(kvm->arch.aliases, aliases);
2518 synchronize_srcu_expedited(&kvm->srcu);
2519 kfree(old_aliases);
2520 r = 0;
1fe779f8 2521
a983fb23 2522out_unlock:
79fac95e 2523 mutex_unlock(&kvm->slots_lock);
1fe779f8
CO		 2524out:
2525 return r;
2526}
2527
2528static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2529{
2530 int r;
2531
2532 r = 0;
2533 switch (chip->chip_id) {
2534 case KVM_IRQCHIP_PIC_MASTER:
2535 memcpy(&chip->chip.pic,
2536 &pic_irqchip(kvm)->pics[0],
2537 sizeof(struct kvm_pic_state));
2538 break;
2539 case KVM_IRQCHIP_PIC_SLAVE:
2540 memcpy(&chip->chip.pic,
2541 &pic_irqchip(kvm)->pics[1],
2542 sizeof(struct kvm_pic_state));
2543 break;
2544 case KVM_IRQCHIP_IOAPIC:
eba0226b 2545 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
1fe779f8
CO		 2546 break;
2547 default:
2548 r = -EINVAL;
2549 break;
2550 }
2551 return r;
2552}
2553
2554static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2555{
2556 int r;
2557
2558 r = 0;
2559 switch (chip->chip_id) {
2560 case KVM_IRQCHIP_PIC_MASTER:
fa8273e9 2561 raw_spin_lock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2562 memcpy(&pic_irqchip(kvm)->pics[0],
2563 &chip->chip.pic,
2564 sizeof(struct kvm_pic_state));
fa8273e9 2565 raw_spin_unlock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2566 break;
2567 case KVM_IRQCHIP_PIC_SLAVE:
fa8273e9 2568 raw_spin_lock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2569 memcpy(&pic_irqchip(kvm)->pics[1],
2570 &chip->chip.pic,
2571 sizeof(struct kvm_pic_state));
fa8273e9 2572 raw_spin_unlock(&pic_irqchip(kvm)->lock);
1fe779f8
CO		 2573 break;
2574 case KVM_IRQCHIP_IOAPIC:
eba0226b 2575 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
1fe779f8
CO		 2576 break;
2577 default:
2578 r = -EINVAL;
2579 break;
2580 }
2581 kvm_pic_update_irq(pic_irqchip(kvm));
2582 return r;
2583}
2584
e0f63cb9
SY		 2585static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2586{
2587 int r = 0;
2588
894a9c55 2589 mutex_lock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9 2590 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
894a9c55 2591 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9
SY		 2592 return r;
2593}
2594
2595static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2596{
2597 int r = 0;
2598
894a9c55 2599 mutex_lock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9 2600 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
e9f42757
BK		 2601 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
2602 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2603 return r;
2604}
2605
2606static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2607{
2608 int r = 0;
2609
2610 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2611 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
2612 sizeof(ps->channels));
2613 ps->flags = kvm->arch.vpit->pit_state.flags;
2614 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2615 return r;
2616}
2617
2618static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2619{
2620 int r = 0, start = 0;
2621 u32 prev_legacy, cur_legacy;
2622 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2623 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
2624 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
2625 if (!prev_legacy && cur_legacy)
2626 start = 1;
2627 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
2628 sizeof(kvm->arch.vpit->pit_state.channels));
2629 kvm->arch.vpit->pit_state.flags = ps->flags;
2630 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
894a9c55 2631 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
e0f63cb9
SY		 2632 return r;
2633}
2634
52d939a0
MT		 2635static int kvm_vm_ioctl_reinject(struct kvm *kvm,
2636 struct kvm_reinject_control *control)
2637{
2638 if (!kvm->arch.vpit)
2639 return -ENXIO;
894a9c55 2640 mutex_lock(&kvm->arch.vpit->pit_state.lock);
52d939a0 2641 kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
894a9c55 2642 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
52d939a0
MT		 2643 return 0;
2644}
2645
5bb064dc
ZX		 2646/*
2647 * Get (and clear) the dirty memory log for a memory slot.
2648 */
2649int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
2650 struct kvm_dirty_log *log)
2651{
87bf6e7d 2652 int r, i;
5bb064dc 2653 struct kvm_memory_slot *memslot;
87bf6e7d 2654 unsigned long n;
b050b015
MT		 2655 unsigned long is_dirty = 0;
2656 unsigned long *dirty_bitmap = NULL;
5bb064dc 2657
79fac95e 2658 mutex_lock(&kvm->slots_lock);
5bb064dc 2659
b050b015
MT		 2660 r = -EINVAL;
2661 if (log->slot >= KVM_MEMORY_SLOTS)
2662 goto out;
2663
2664 memslot = &kvm->memslots->memslots[log->slot];
2665 r = -ENOENT;
2666 if (!memslot->dirty_bitmap)
2667 goto out;
2668
87bf6e7d 2669 n = kvm_dirty_bitmap_bytes(memslot);
b050b015
MT		 2670
2671 r = -ENOMEM;
2672 dirty_bitmap = vmalloc(n);
2673 if (!dirty_bitmap)
5bb064dc 2674 goto out;
b050b015
MT		 2675 memset(dirty_bitmap, 0, n);
2676
2677 for (i = 0; !is_dirty && i < n/sizeof(long); i++)
2678 is_dirty = memslot->dirty_bitmap[i];
5bb064dc
ZX		 2679
2680 /* If nothing is dirty, don't bother messing with page tables. */
2681 if (is_dirty) {
b050b015
MT		 2682 struct kvm_memslots *slots, *old_slots;
2683
7c8a83b7 2684 spin_lock(&kvm->mmu_lock);
5bb064dc 2685 kvm_mmu_slot_remove_write_access(kvm, log->slot);
7c8a83b7 2686 spin_unlock(&kvm->mmu_lock);
b050b015
MT		 2687
2688 slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
2689 if (!slots)
2690 goto out_free;
2691
2692 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
2693 slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
2694
2695 old_slots = kvm->memslots;
2696 rcu_assign_pointer(kvm->memslots, slots);
2697 synchronize_srcu_expedited(&kvm->srcu);
2698 dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap;
2699 kfree(old_slots);
5bb064dc 2700 }
b050b015 2701
5bb064dc 2702 r = 0;
b050b015
MT		 2703 if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
2704 r = -EFAULT;
2705out_free:
2706 vfree(dirty_bitmap);
5bb064dc 2707out:
79fac95e 2708 mutex_unlock(&kvm->slots_lock);
5bb064dc
ZX		 2709 return r;
2710}
2711
1fe779f8
CO		 2712long kvm_arch_vm_ioctl(struct file *filp,
2713 unsigned int ioctl, unsigned long arg)
2714{
2715 struct kvm *kvm = filp->private_data;
2716 void __user *argp = (void __user *)arg;
367e1319 2717 int r = -ENOTTY;
f0d66275
DH		 2718 /*
2719 * This union makes it completely explicit to gcc-3.x
2720 * that these two variables' stack usage should be
2721 * combined, not added together.
2722 */
2723 union {
2724 struct kvm_pit_state ps;
e9f42757 2725 struct kvm_pit_state2 ps2;
f0d66275 2726 struct kvm_memory_alias alias;
c5ff41ce 2727 struct kvm_pit_config pit_config;
f0d66275 2728 } u;
1fe779f8
CO		 2729
2730 switch (ioctl) {
2731 case KVM_SET_TSS_ADDR:
2732 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
2733 if (r < 0)
2734 goto out;
2735 break;
b927a3ce
SY		 2736 case KVM_SET_IDENTITY_MAP_ADDR: {
2737 u64 ident_addr;
2738
2739 r = -EFAULT;
2740 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
2741 goto out;
2742 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
2743 if (r < 0)
2744 goto out;
2745 break;
2746 }
1fe779f8
CO		 2747 case KVM_SET_MEMORY_REGION: {
2748 struct kvm_memory_region kvm_mem;
2749 struct kvm_userspace_memory_region kvm_userspace_mem;
2750
2751 r = -EFAULT;
2752 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
2753 goto out;
2754 kvm_userspace_mem.slot = kvm_mem.slot;
2755 kvm_userspace_mem.flags = kvm_mem.flags;
2756 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
2757 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
2758 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
2759 if (r)
2760 goto out;
2761 break;
2762 }
2763 case KVM_SET_NR_MMU_PAGES:
2764 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
2765 if (r)
2766 goto out;
2767 break;
2768 case KVM_GET_NR_MMU_PAGES:
2769 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
2770 break;
f0d66275 2771 case KVM_SET_MEMORY_ALIAS:
1fe779f8 2772 r = -EFAULT;
f0d66275 2773 if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias)))
1fe779f8 2774 goto out;
f0d66275 2775 r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias);
1fe779f8
CO		 2776 if (r)
2777 goto out;
2778 break;
3ddea128
MT		 2779 case KVM_CREATE_IRQCHIP: {
2780 struct kvm_pic *vpic;
2781
2782 mutex_lock(&kvm->lock);
2783 r = -EEXIST;
2784 if (kvm->arch.vpic)
2785 goto create_irqchip_unlock;
1fe779f8 2786 r = -ENOMEM;
3ddea128
MT		 2787 vpic = kvm_create_pic(kvm);
2788 if (vpic) {
1fe779f8
CO		 2789 r = kvm_ioapic_init(kvm);
2790 if (r) {
72bb2fcd
WY		 2791 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
2792 &vpic->dev);
3ddea128
MT		 2793 kfree(vpic);
2794 goto create_irqchip_unlock;
1fe779f8
CO		 2795 }
2796 } else
3ddea128
MT		 2797 goto create_irqchip_unlock;
2798 smp_wmb();
2799 kvm->arch.vpic = vpic;
2800 smp_wmb();
399ec807
AK		 2801 r = kvm_setup_default_irq_routing(kvm);
2802 if (r) {
3ddea128 2803 mutex_lock(&kvm->irq_lock);
72bb2fcd
WY		 2804 kvm_ioapic_destroy(kvm);
2805 kvm_destroy_pic(kvm);
3ddea128 2806 mutex_unlock(&kvm->irq_lock);
399ec807 2807 }
3ddea128
MT		 2808 create_irqchip_unlock:
2809 mutex_unlock(&kvm->lock);
1fe779f8 2810 break;
3ddea128 2811 }
7837699f 2812 case KVM_CREATE_PIT:
c5ff41ce
JK		 2813 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
2814 goto create_pit;
2815 case KVM_CREATE_PIT2:
2816 r = -EFAULT;
2817 if (copy_from_user(&u.pit_config, argp,
2818 sizeof(struct kvm_pit_config)))
2819 goto out;
2820 create_pit:
79fac95e 2821 mutex_lock(&kvm->slots_lock);
269e05e4
AK		 2822 r = -EEXIST;
2823 if (kvm->arch.vpit)
2824 goto create_pit_unlock;
7837699f 2825 r = -ENOMEM;
c5ff41ce 2826 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
7837699f
SY		 2827 if (kvm->arch.vpit)
2828 r = 0;
269e05e4 2829 create_pit_unlock:
79fac95e 2830 mutex_unlock(&kvm->slots_lock);
7837699f 2831 break;
4925663a 2832 case KVM_IRQ_LINE_STATUS:
1fe779f8
CO		 2833 case KVM_IRQ_LINE: {
2834 struct kvm_irq_level irq_event;
2835
2836 r = -EFAULT;
2837 if (copy_from_user(&irq_event, argp, sizeof irq_event))
2838 goto out;
160d2f6c 2839 r = -ENXIO;
1fe779f8 2840 if (irqchip_in_kernel(kvm)) {
4925663a 2841 __s32 status;
4925663a
GN		 2842 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2843 irq_event.irq, irq_event.level);
4925663a 2844 if (ioctl == KVM_IRQ_LINE_STATUS) {
160d2f6c 2845 r = -EFAULT;
4925663a
GN		 2846 irq_event.status = status;
2847 if (copy_to_user(argp, &irq_event,
2848 sizeof irq_event))
2849 goto out;
2850 }
1fe779f8
CO		 2851 r = 0;
2852 }
2853 break;
2854 }
2855 case KVM_GET_IRQCHIP: {
2856 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
f0d66275 2857 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
1fe779f8 2858
f0d66275
DH		 2859 r = -ENOMEM;
2860 if (!chip)
1fe779f8 2861 goto out;
f0d66275
DH		 2862 r = -EFAULT;
2863 if (copy_from_user(chip, argp, sizeof *chip))
2864 goto get_irqchip_out;
1fe779f8
CO		 2865 r = -ENXIO;
2866 if (!irqchip_in_kernel(kvm))
f0d66275
DH		 2867 goto get_irqchip_out;
2868 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
1fe779f8 2869 if (r)
f0d66275 2870 goto get_irqchip_out;
1fe779f8 2871 r = -EFAULT;
f0d66275
DH		 2872 if (copy_to_user(argp, chip, sizeof *chip))
2873 goto get_irqchip_out;
1fe779f8 2874 r = 0;
f0d66275
DH		 2875 get_irqchip_out:
2876 kfree(chip);
2877 if (r)
2878 goto out;
1fe779f8
CO		 2879 break;
2880 }
2881 case KVM_SET_IRQCHIP: {
2882 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
f0d66275 2883 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
1fe779f8 2884
f0d66275
DH		 2885 r = -ENOMEM;
2886 if (!chip)
1fe779f8 2887 goto out;
f0d66275
DH		 2888 r = -EFAULT;
2889 if (copy_from_user(chip, argp, sizeof *chip))
2890 goto set_irqchip_out;
1fe779f8
CO		 2891 r = -ENXIO;
2892 if (!irqchip_in_kernel(kvm))
f0d66275
DH		 2893 goto set_irqchip_out;
2894 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
1fe779f8 2895 if (r)
f0d66275 2896 goto set_irqchip_out;
1fe779f8 2897 r = 0;
f0d66275
DH		 2898 set_irqchip_out:
2899 kfree(chip);
2900 if (r)
2901 goto out;
1fe779f8
CO		 2902 break;
2903 }
e0f63cb9 2904 case KVM_GET_PIT: {
e0f63cb9 2905 r = -EFAULT;
f0d66275 2906 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
e0f63cb9
SY		 2907 goto out;
2908 r = -ENXIO;
2909 if (!kvm->arch.vpit)
2910 goto out;
f0d66275 2911 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
e0f63cb9
SY		 2912 if (r)
2913 goto out;
2914 r = -EFAULT;
f0d66275 2915 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
e0f63cb9
SY		 2916 goto out;
2917 r = 0;
2918 break;
2919 }
2920 case KVM_SET_PIT: {
e0f63cb9 2921 r = -EFAULT;
f0d66275 2922 if (copy_from_user(&u.ps, argp, sizeof u.ps))
e0f63cb9
SY		 2923 goto out;
2924 r = -ENXIO;
2925 if (!kvm->arch.vpit)
2926 goto out;
f0d66275 2927 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
e0f63cb9
SY		 2928 if (r)
2929 goto out;
2930 r = 0;
2931 break;
2932 }
e9f42757
BK		 2933 case KVM_GET_PIT2: {
2934 r = -ENXIO;
2935 if (!kvm->arch.vpit)
2936 goto out;
2937 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
2938 if (r)
2939 goto out;
2940 r = -EFAULT;
2941 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
2942 goto out;
2943 r = 0;
2944 break;
2945 }
2946 case KVM_SET_PIT2: {
2947 r = -EFAULT;
2948 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
2949 goto out;
2950 r = -ENXIO;
2951 if (!kvm->arch.vpit)
2952 goto out;
2953 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
2954 if (r)
2955 goto out;
2956 r = 0;
2957 break;
2958 }
52d939a0
MT		 2959 case KVM_REINJECT_CONTROL: {
2960 struct kvm_reinject_control control;
2961 r = -EFAULT;
2962 if (copy_from_user(&control, argp, sizeof(control)))
2963 goto out;
2964 r = kvm_vm_ioctl_reinject(kvm, &control);
2965 if (r)
2966 goto out;
2967 r = 0;
2968 break;
2969 }
ffde22ac
ES		 2970 case KVM_XEN_HVM_CONFIG: {
2971 r = -EFAULT;
2972 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
2973 sizeof(struct kvm_xen_hvm_config)))
2974 goto out;
2975 r = -EINVAL;
2976 if (kvm->arch.xen_hvm_config.flags)
2977 goto out;
2978 r = 0;
2979 break;
2980 }
afbcf7ab
GC		 2981 case KVM_SET_CLOCK: {
2982 struct timespec now;
2983 struct kvm_clock_data user_ns;
2984 u64 now_ns;
2985 s64 delta;
2986
2987 r = -EFAULT;
2988 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
2989 goto out;
2990
2991 r = -EINVAL;
2992 if (user_ns.flags)
2993 goto out;
2994
2995 r = 0;
2996 ktime_get_ts(&now);
2997 now_ns = timespec_to_ns(&now);
2998 delta = user_ns.clock - now_ns;
2999 kvm->arch.kvmclock_offset = delta;
3000 break;
3001 }
3002 case KVM_GET_CLOCK: {
3003 struct timespec now;
3004 struct kvm_clock_data user_ns;
3005 u64 now_ns;
3006
3007 ktime_get_ts(&now);
3008 now_ns = timespec_to_ns(&now);
3009 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
3010 user_ns.flags = 0;
3011
3012 r = -EFAULT;
3013 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3014 goto out;
3015 r = 0;
3016 break;
3017 }
3018
1fe779f8
CO		 3019 default:
3020 ;
3021 }
3022out:
3023 return r;
3024}
3025
a16b043c 3026static void kvm_init_msr_list(void)
043405e1
CO		 3027{
3028 u32 dummy[2];
3029 unsigned i, j;
3030
e3267cbb
GC		 3031 /* skip the first msrs in the list. KVM-specific */
3032 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
043405e1
CO		 3033 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3034 continue;
3035 if (j < i)
3036 msrs_to_save[j] = msrs_to_save[i];
3037 j++;
3038 }
3039 num_msrs_to_save = j;
3040}
3041
bda9020e
MT		 3042static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3043 const void *v)
bbd9b64e 3044{
bda9020e
MT		 3045 if (vcpu->arch.apic &&
3046 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v))
3047 return 0;
bbd9b64e 3048
e93f8a0f 3049 return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
bbd9b64e
CO		 3050}
3051
bda9020e 3052static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
bbd9b64e 3053{
bda9020e
MT		 3054 if (vcpu->arch.apic &&
3055 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v))
3056 return 0;
bbd9b64e 3057
e93f8a0f 3058 return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
bbd9b64e
CO		 3059}
3060
1871c602
GN		 3061gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3062{
3063 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3064 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3065}
3066
3067 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3068{
3069 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3070 access |= PFERR_FETCH_MASK;
3071 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3072}
3073
3074gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3075{
3076 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3077 access |= PFERR_WRITE_MASK;
3078 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3079}
3080
3081/* uses this to access any guest's mapped memory without checking CPL */
3082gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3083{
3084 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error);
3085}
3086
3087static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3088 struct kvm_vcpu *vcpu, u32 access,
3089 u32 *error)
bbd9b64e
CO		 3090{
3091 void *data = val;
10589a46 3092 int r = X86EMUL_CONTINUE;
bbd9b64e
CO		 3093
3094 while (bytes) {
1871c602 3095 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error);
bbd9b64e 3096 unsigned offset = addr & (PAGE_SIZE-1);
77c2002e 3097 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
bbd9b64e
CO		 3098 int ret;
3099
10589a46
MT		 3100 if (gpa == UNMAPPED_GVA) {
3101 r = X86EMUL_PROPAGATE_FAULT;
3102 goto out;
3103 }
77c2002e 3104 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
10589a46
MT		 3105 if (ret < 0) {
3106 r = X86EMUL_UNHANDLEABLE;
3107 goto out;
3108 }
bbd9b64e 3109
77c2002e
IE		 3110 bytes -= toread;
3111 data += toread;
3112 addr += toread;
bbd9b64e 3113 }
10589a46 3114out:
10589a46 3115 return r;
bbd9b64e 3116}
77c2002e 3117
1871c602
GN		 3118/* used for instruction fetching */
3119static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes,
3120 struct kvm_vcpu *vcpu, u32 *error)
3121{
3122 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3123 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
3124 access | PFERR_FETCH_MASK, error);
3125}
3126
3127static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
3128 struct kvm_vcpu *vcpu, u32 *error)
3129{
3130 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3131 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
3132 error);
3133}
3134
3135static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes,
3136 struct kvm_vcpu *vcpu, u32 *error)
3137{
3138 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error);
3139}
3140
cded19f3 3141static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes,
1871c602 3142 struct kvm_vcpu *vcpu, u32 *error)
77c2002e
IE		 3143{
3144 void *data = val;
3145 int r = X86EMUL_CONTINUE;
3146
3147 while (bytes) {
1871c602 3148 gpa_t gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error);
77c2002e
IE		 3149 unsigned offset = addr & (PAGE_SIZE-1);
3150 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
3151 int ret;
3152
3153 if (gpa == UNMAPPED_GVA) {
3154 r = X86EMUL_PROPAGATE_FAULT;
3155 goto out;
3156 }
3157 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
3158 if (ret < 0) {
3159 r = X86EMUL_UNHANDLEABLE;
3160 goto out;
3161 }
3162
3163 bytes -= towrite;
3164 data += towrite;
3165 addr += towrite;
3166 }
3167out:
3168 return r;
3169}
3170
bbd9b64e 3171
bbd9b64e
CO		 3172static int emulator_read_emulated(unsigned long addr,
3173 void *val,
3174 unsigned int bytes,
3175 struct kvm_vcpu *vcpu)
3176{
bbd9b64e 3177 gpa_t gpa;
1871c602 3178 u32 error_code;
bbd9b64e
CO		 3179
3180 if (vcpu->mmio_read_completed) {
3181 memcpy(val, vcpu->mmio_data, bytes);
aec51dc4
AK		 3182 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
3183 vcpu->mmio_phys_addr, *(u64 *)val);
bbd9b64e
CO		 3184 vcpu->mmio_read_completed = 0;
3185 return X86EMUL_CONTINUE;
3186 }
3187
1871c602
GN		 3188 gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code);
3189
3190 if (gpa == UNMAPPED_GVA) {
3191 kvm_inject_page_fault(vcpu, addr, error_code);
3192 return X86EMUL_PROPAGATE_FAULT;
3193 }
bbd9b64e
CO		 3194
3195 /* For APIC access vmexit */
3196 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3197 goto mmio;
3198
1871c602 3199 if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL)
77c2002e 3200 == X86EMUL_CONTINUE)
bbd9b64e 3201 return X86EMUL_CONTINUE;
bbd9b64e
CO		 3202
3203mmio:
3204 /*
3205 * Is this MMIO handled locally?
3206 */
aec51dc4
AK		 3207 if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) {
3208 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val);
bbd9b64e
CO		 3209 return X86EMUL_CONTINUE;
3210 }
aec51dc4
AK		 3211
3212 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
bbd9b64e
CO		 3213
3214 vcpu->mmio_needed = 1;
3215 vcpu->mmio_phys_addr = gpa;
3216 vcpu->mmio_size = bytes;
3217 vcpu->mmio_is_write = 0;
3218
3219 return X86EMUL_UNHANDLEABLE;
3220}
3221
3200f405 3222int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
9f811285 3223 const void *val, int bytes)
bbd9b64e
CO		 3224{
3225 int ret;
3226
3227 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
9f811285 3228 if (ret < 0)
bbd9b64e 3229 return 0;
ad218f85 3230 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
bbd9b64e
CO		 3231 return 1;
3232}
3233
3234static int emulator_write_emulated_onepage(unsigned long addr,
3235 const void *val,
3236 unsigned int bytes,
4a5f48f6
AK		 3237 struct kvm_vcpu *vcpu,
3238 bool mmu_only)
bbd9b64e 3239{
10589a46 3240 gpa_t gpa;
1871c602 3241 u32 error_code;
10589a46 3242
1871c602 3243 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code);
bbd9b64e
CO		 3244
3245 if (gpa == UNMAPPED_GVA) {
1871c602 3246 kvm_inject_page_fault(vcpu, addr, error_code);
bbd9b64e
CO		 3247 return X86EMUL_PROPAGATE_FAULT;
3248 }
3249
3250 /* For APIC access vmexit */
3251 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3252 goto mmio;
3253
4a5f48f6
AK		 3254 if (mmu_only) {
3255 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
3256 return X86EMUL_CONTINUE;
3257 }
bbd9b64e
CO		 3258 if (emulator_write_phys(vcpu, gpa, val, bytes))
3259 return X86EMUL_CONTINUE;
3260
3261mmio:
aec51dc4 3262 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
bbd9b64e
CO		 3263 /*
3264 * Is this MMIO handled locally?
3265 */
bda9020e 3266 if (!vcpu_mmio_write(vcpu, gpa, bytes, val))
bbd9b64e 3267 return X86EMUL_CONTINUE;
bbd9b64e
CO		 3268
3269 vcpu->mmio_needed = 1;
3270 vcpu->mmio_phys_addr = gpa;
3271 vcpu->mmio_size = bytes;
3272 vcpu->mmio_is_write = 1;
3273 memcpy(vcpu->mmio_data, val, bytes);
3274
3275 return X86EMUL_CONTINUE;
3276}
3277
4a5f48f6 3278int __emulator_write_emulated(unsigned long addr,
bbd9b64e
CO		 3279 const void *val,
3280 unsigned int bytes,
4a5f48f6
AK		 3281 struct kvm_vcpu *vcpu,
3282 bool mmu_only)
bbd9b64e
CO		 3283{
3284 /* Crossing a page boundary? */
3285 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
3286 int rc, now;
3287
3288 now = -addr & ~PAGE_MASK;
4a5f48f6
AK		 3289 rc = emulator_write_emulated_onepage(addr, val, now, vcpu,
3290 mmu_only);
bbd9b64e
CO		 3291 if (rc != X86EMUL_CONTINUE)
3292 return rc;
3293 addr += now;
3294 val += now;
3295 bytes -= now;
3296 }
4a5f48f6
AK		 3297 return emulator_write_emulated_onepage(addr, val, bytes, vcpu,
3298 mmu_only);
3299}
3300
3301int emulator_write_emulated(unsigned long addr,
3302 const void *val,
3303 unsigned int bytes,
3304 struct kvm_vcpu *vcpu)
3305{
3306 return __emulator_write_emulated(addr, val, bytes, vcpu, false);
bbd9b64e
CO		 3307}
3308EXPORT_SYMBOL_GPL(emulator_write_emulated);
3309
daea3e73
AK		 3310#define CMPXCHG_TYPE(t, ptr, old, new) \
3311 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3312
3313#ifdef CONFIG_X86_64
3314# define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3315#else
3316# define CMPXCHG64(ptr, old, new) \
3317 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u *)(new)) == *(u64 *)(old))
3318#endif
3319
bbd9b64e
CO		 3320static int emulator_cmpxchg_emulated(unsigned long addr,
3321 const void *old,
3322 const void *new,
3323 unsigned int bytes,
3324 struct kvm_vcpu *vcpu)
3325{
daea3e73
AK		 3326 gpa_t gpa;
3327 struct page *page;
3328 char *kaddr;
3329 bool exchanged;
2bacc55c 3330
daea3e73
AK		 3331 /* guests cmpxchg8b have to be emulated atomically */
3332 if (bytes > 8 || (bytes & (bytes - 1)))
3333 goto emul_write;
10589a46 3334
daea3e73 3335 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
2bacc55c 3336
daea3e73
AK		 3337 if (gpa == UNMAPPED_GVA ||
3338 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3339 goto emul_write;
2bacc55c 3340
daea3e73
AK		 3341 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
3342 goto emul_write;
72dc67a6 3343
daea3e73 3344 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
72dc67a6 3345
daea3e73
AK		 3346 kaddr = kmap_atomic(page, KM_USER0);
3347 kaddr += offset_in_page(gpa);
3348 switch (bytes) {
3349 case 1:
3350 exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
3351 break;
3352 case 2:
3353 exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
3354 break;
3355 case 4:
3356 exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
3357 break;
3358 case 8:
3359 exchanged = CMPXCHG64(kaddr, old, new);
3360 break;
3361 default:
3362 BUG();
2bacc55c 3363 }
daea3e73
AK		 3364 kunmap_atomic(kaddr, KM_USER0);
3365 kvm_release_page_dirty(page);
3366
3367 if (!exchanged)
3368 return X86EMUL_CMPXCHG_FAILED;
3369
4a5f48f6
AK		 3370 return __emulator_write_emulated(addr, new, bytes, vcpu, true);
3371
3200f405 3372emul_write:
daea3e73 3373 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
2bacc55c 3374
bbd9b64e
CO		 3375 return emulator_write_emulated(addr, new, bytes, vcpu);
3376}
3377
3378static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
3379{
3380 return kvm_x86_ops->get_segment_base(vcpu, seg);
3381}
3382
3383int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
3384{
a7052897 3385 kvm_mmu_invlpg(vcpu, address);
bbd9b64e
CO		 3386 return X86EMUL_CONTINUE;
3387}
3388
3389int emulate_clts(struct kvm_vcpu *vcpu)
3390{
4d4ec087 3391 kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
6b52d186 3392 kvm_x86_ops->fpu_activate(vcpu);
bbd9b64e
CO		 3393 return X86EMUL_CONTINUE;
3394}
3395
3396int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
3397{
c76de350 3398 return kvm_x86_ops->get_dr(ctxt->vcpu, dr, dest);
bbd9b64e
CO		 3399}
3400
3401int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
3402{
3403 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
bbd9b64e 3404
c76de350 3405 return kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask);
bbd9b64e
CO		 3406}
3407
3408void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
3409{
bbd9b64e 3410 u8 opcodes[4];
5fdbf976 3411 unsigned long rip = kvm_rip_read(vcpu);
bbd9b64e
CO		 3412 unsigned long rip_linear;
3413
f76c710d 3414 if (!printk_ratelimit())
bbd9b64e
CO		 3415 return;
3416
25be4608
GC		 3417 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
3418
1871c602 3419 kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu, NULL);
bbd9b64e
CO		 3420
3421 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
3422 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
bbd9b64e
CO		 3423}
3424EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
3425
14af3f3c 3426static struct x86_emulate_ops emulate_ops = {
1871c602
GN		 3427 .read_std = kvm_read_guest_virt_system,
3428 .fetch = kvm_fetch_guest_virt,
bbd9b64e
CO		 3429 .read_emulated = emulator_read_emulated,
3430 .write_emulated = emulator_write_emulated,
3431 .cmpxchg_emulated = emulator_cmpxchg_emulated,
3432};
3433
5fdbf976
MT		 3434static void cache_all_regs(struct kvm_vcpu *vcpu)
3435{
3436 kvm_register_read(vcpu, VCPU_REGS_RAX);
3437 kvm_register_read(vcpu, VCPU_REGS_RSP);
3438 kvm_register_read(vcpu, VCPU_REGS_RIP);
3439 vcpu->arch.regs_dirty = ~0;
3440}
3441
bbd9b64e 3442int emulate_instruction(struct kvm_vcpu *vcpu,
bbd9b64e
CO		 3443 unsigned long cr2,
3444 u16 error_code,
571008da 3445 int emulation_type)
bbd9b64e 3446{
310b5d30 3447 int r, shadow_mask;
571008da 3448 struct decode_cache *c;
851ba692 3449 struct kvm_run *run = vcpu->run;
bbd9b64e 3450
26eef70c 3451 kvm_clear_exception_queue(vcpu);
ad312c7c 3452 vcpu->arch.mmio_fault_cr2 = cr2;
5fdbf976 3453 /*
56e82318 3454 * TODO: fix emulate.c to use guest_read/write_register
5fdbf976
MT		 3455 * instead of direct ->regs accesses, can save hundred cycles
3456 * on Intel for instructions that don't read/change RSP, for
3457 * for example.
3458 */
3459 cache_all_regs(vcpu);
bbd9b64e
CO		 3460
3461 vcpu->mmio_is_write = 0;
ad312c7c 3462 vcpu->arch.pio.string = 0;
bbd9b64e 3463
571008da 3464 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
bbd9b64e
CO		 3465 int cs_db, cs_l;
3466 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
3467
ad312c7c 3468 vcpu->arch.emulate_ctxt.vcpu = vcpu;
83bf0002 3469 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
ad312c7c 3470 vcpu->arch.emulate_ctxt.mode =
a0044755 3471 (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
ad312c7c 3472 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
a0044755 3473 ? X86EMUL_MODE_VM86 : cs_l
bbd9b64e
CO		 3474 ? X86EMUL_MODE_PROT64 : cs_db
3475 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
3476
ad312c7c 3477 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
571008da 3478
0cb5762e
AP		 3479 /* Only allow emulation of specific instructions on #UD
3480 * (namely VMMCALL, sysenter, sysexit, syscall)*/
571008da 3481 c = &vcpu->arch.emulate_ctxt.decode;
0cb5762e
AP		 3482 if (emulation_type & EMULTYPE_TRAP_UD) {
3483 if (!c->twobyte)
3484 return EMULATE_FAIL;
3485 switch (c->b) {
3486 case 0x01: /* VMMCALL */
3487 if (c->modrm_mod != 3 || c->modrm_rm != 1)
3488 return EMULATE_FAIL;
3489 break;
3490 case 0x34: /* sysenter */
3491 case 0x35: /* sysexit */
3492 if (c->modrm_mod != 0 || c->modrm_rm != 0)
3493 return EMULATE_FAIL;
3494 break;
3495 case 0x05: /* syscall */
3496 if (c->modrm_mod != 0 || c->modrm_rm != 0)
3497 return EMULATE_FAIL;
3498 break;
3499 default:
3500 return EMULATE_FAIL;
3501 }
3502
3503 if (!(c->modrm_reg == 0 || c->modrm_reg == 3))
3504 return EMULATE_FAIL;
3505 }
571008da 3506
f2b5756b 3507 ++vcpu->stat.insn_emulation;
bbd9b64e 3508 if (r) {
f2b5756b 3509 ++vcpu->stat.insn_emulation_fail;
bbd9b64e
CO		 3510 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
3511 return EMULATE_DONE;
3512 return EMULATE_FAIL;
3513 }
3514 }
3515
ba8afb6b
GN		 3516 if (emulation_type & EMULTYPE_SKIP) {
3517 kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip);
3518 return EMULATE_DONE;
3519 }
3520
ad312c7c 3521 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
310b5d30
GC		 3522 shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
3523
3524 if (r == 0)
3525 kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
bbd9b64e 3526
ad312c7c 3527 if (vcpu->arch.pio.string)
bbd9b64e
CO		 3528 return EMULATE_DO_MMIO;
3529
112592da 3530 if (r || vcpu->mmio_is_write) {
bbd9b64e
CO		 3531 run->exit_reason = KVM_EXIT_MMIO;
3532 run->mmio.phys_addr = vcpu->mmio_phys_addr;
3533 memcpy(run->mmio.data, vcpu->mmio_data, 8);
3534 run->mmio.len = vcpu->mmio_size;
3535 run->mmio.is_write = vcpu->mmio_is_write;
3536 }
3537
3538 if (r) {
3539 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
3540 return EMULATE_DONE;
3541 if (!vcpu->mmio_needed) {
3542 kvm_report_emulation_failure(vcpu, "mmio");
3543 return EMULATE_FAIL;
3544 }
3545 return EMULATE_DO_MMIO;
3546 }
3547
83bf0002 3548 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
bbd9b64e
CO		 3549
3550 if (vcpu->mmio_is_write) {
3551 vcpu->mmio_needed = 0;
3552 return EMULATE_DO_MMIO;
3553 }
3554
3555 return EMULATE_DONE;
3556}
3557EXPORT_SYMBOL_GPL(emulate_instruction);
3558
de7d789a
CO		 3559static int pio_copy_data(struct kvm_vcpu *vcpu)
3560{
ad312c7c 3561 void *p = vcpu->arch.pio_data;
0f346074 3562 gva_t q = vcpu->arch.pio.guest_gva;
de7d789a 3563 unsigned bytes;
0f346074 3564 int ret;
1871c602 3565 u32 error_code;
de7d789a 3566
ad312c7c
ZX		 3567 bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count;
3568 if (vcpu->arch.pio.in)
1871c602 3569 ret = kvm_write_guest_virt(q, p, bytes, vcpu, &error_code);
de7d789a 3570 else
1871c602
GN		 3571 ret = kvm_read_guest_virt(q, p, bytes, vcpu, &error_code);
3572
3573 if (ret == X86EMUL_PROPAGATE_FAULT)
3574 kvm_inject_page_fault(vcpu, q, error_code);
3575
0f346074 3576 return ret;
de7d789a
CO		 3577}
3578
3579int complete_pio(struct kvm_vcpu *vcpu)
3580{
ad312c7c 3581 struct kvm_pio_request *io = &vcpu->arch.pio;
de7d789a
CO		 3582 long delta;
3583 int r;
5fdbf976 3584 unsigned long val;
de7d789a
CO		 3585
3586 if (!io->string) {
5fdbf976
MT		 3587 if (io->in) {
3588 val = kvm_register_read(vcpu, VCPU_REGS_RAX);
3589 memcpy(&val, vcpu->arch.pio_data, io->size);
3590 kvm_register_write(vcpu, VCPU_REGS_RAX, val);
3591 }
de7d789a
CO		 3592 } else {
3593 if (io->in) {
3594 r = pio_copy_data(vcpu);
5fdbf976 3595 if (r)
1871c602 3596 goto out;
de7d789a
CO		 3597 }
3598
3599 delta = 1;
3600 if (io->rep) {
3601 delta *= io->cur_count;
3602 /*
3603 * The size of the register should really depend on
3604 * current address size.
3605 */
5fdbf976
MT		 3606 val = kvm_register_read(vcpu, VCPU_REGS_RCX);
3607 val -= delta;
3608 kvm_register_write(vcpu, VCPU_REGS_RCX, val);
de7d789a
CO		 3609 }
3610 if (io->down)
3611 delta = -delta;
3612 delta *= io->size;
5fdbf976
MT		 3613 if (io->in) {
3614 val = kvm_register_read(vcpu, VCPU_REGS_RDI);
3615 val += delta;
3616 kvm_register_write(vcpu, VCPU_REGS_RDI, val);
3617 } else {
3618 val = kvm_register_read(vcpu, VCPU_REGS_RSI);
3619 val += delta;
3620 kvm_register_write(vcpu, VCPU_REGS_RSI, val);
3621 }
de7d789a 3622 }
1871c602 3623out:
de7d789a
CO		 3624 io->count -= io->cur_count;
3625 io->cur_count = 0;
3626
3627 return 0;
3628}
3629
bda9020e 3630static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
de7d789a
CO		 3631{
3632 /* TODO: String I/O for in kernel device */
bda9020e 3633 int r;
de7d789a 3634
ad312c7c 3635 if (vcpu->arch.pio.in)
e93f8a0f 3636 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
bda9020e 3637 vcpu->arch.pio.size, pd);
de7d789a 3638 else
e93f8a0f
MT		 3639 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
3640 vcpu->arch.pio.port, vcpu->arch.pio.size,
3641 pd);
bda9020e 3642 return r;
de7d789a
CO		 3643}
3644
bda9020e 3645static int pio_string_write(struct kvm_vcpu *vcpu)
de7d789a 3646{
ad312c7c
ZX		 3647 struct kvm_pio_request *io = &vcpu->arch.pio;
3648 void *pd = vcpu->arch.pio_data;
bda9020e 3649 int i, r = 0;
de7d789a 3650
de7d789a 3651 for (i = 0; i < io->cur_count; i++) {
e93f8a0f 3652 if (kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
bda9020e
MT		 3653 io->port, io->size, pd)) {
3654 r = -EOPNOTSUPP;
3655 break;
3656 }
de7d789a
CO		 3657 pd += io->size;
3658 }
bda9020e 3659 return r;
de7d789a
CO		 3660}
3661
851ba692 3662int kvm_emulate_pio(struct kvm_vcpu *vcpu, int in, int size, unsigned port)
de7d789a 3663{
5fdbf976 3664 unsigned long val;
de7d789a 3665
f850e2e6
GN		 3666 trace_kvm_pio(!in, port, size, 1);
3667
de7d789a
CO		 3668 vcpu->run->exit_reason = KVM_EXIT_IO;
3669 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
ad312c7c 3670 vcpu->run->io.size = vcpu->arch.pio.size = size;
de7d789a 3671 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
ad312c7c
ZX		 3672 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1;
3673 vcpu->run->io.port = vcpu->arch.pio.port = port;
3674 vcpu->arch.pio.in = in;
3675 vcpu->arch.pio.string = 0;
3676 vcpu->arch.pio.down = 0;
ad312c7c 3677 vcpu->arch.pio.rep = 0;
de7d789a 3678
1976d2d2
TY		 3679 if (!vcpu->arch.pio.in) {
3680 val = kvm_register_read(vcpu, VCPU_REGS_RAX);
3681 memcpy(vcpu->arch.pio_data, &val, 4);
3682 }
de7d789a 3683
bda9020e 3684 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
de7d789a
CO		 3685 complete_pio(vcpu);
3686 return 1;
3687 }
3688 return 0;
3689}
3690EXPORT_SYMBOL_GPL(kvm_emulate_pio);
3691
851ba692 3692int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, int in,
de7d789a
CO		 3693 int size, unsigned long count, int down,
3694 gva_t address, int rep, unsigned port)
3695{
3696 unsigned now, in_page;
0f346074 3697 int ret = 0;
de7d789a 3698
f850e2e6
GN		 3699 trace_kvm_pio(!in, port, size, count);
3700
de7d789a
CO		 3701 vcpu->run->exit_reason = KVM_EXIT_IO;
3702 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
ad312c7c 3703 vcpu->run->io.size = vcpu->arch.pio.size = size;
de7d789a 3704 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
ad312c7c
ZX		 3705 vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count;
3706 vcpu->run->io.port = vcpu->arch.pio.port = port;
3707 vcpu->arch.pio.in = in;
3708 vcpu->arch.pio.string = 1;
3709 vcpu->arch.pio.down = down;
ad312c7c 3710 vcpu->arch.pio.rep = rep;
de7d789a
CO		 3711
3712 if (!count) {
3713 kvm_x86_ops->skip_emulated_instruction(vcpu);
3714 return 1;
3715 }
3716
3717 if (!down)
3718 in_page = PAGE_SIZE - offset_in_page(address);
3719 else
3720 in_page = offset_in_page(address) + size;
3721 now = min(count, (unsigned long)in_page / size);
0f346074 3722 if (!now)
de7d789a 3723 now = 1;
de7d789a
CO		 3724 if (down) {
3725 /*
3726 * String I/O in reverse. Yuck. Kill the guest, fix later.
3727 */
3728 pr_unimpl(vcpu, "guest string pio down\n");
c1a5d4f9 3729 kvm_inject_gp(vcpu, 0);
de7d789a
CO		 3730 return 1;
3731 }
3732 vcpu->run->io.count = now;
ad312c7c 3733 vcpu->arch.pio.cur_count = now;
de7d789a 3734
ad312c7c 3735 if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count)
de7d789a
CO		 3736 kvm_x86_ops->skip_emulated_instruction(vcpu);
3737
0f346074 3738 vcpu->arch.pio.guest_gva = address;
de7d789a 3739
ad312c7c 3740 if (!vcpu->arch.pio.in) {
de7d789a
CO		 3741 /* string PIO write */
3742 ret = pio_copy_data(vcpu);
1871c602 3743 if (ret == X86EMUL_PROPAGATE_FAULT)
0f346074 3744 return 1;
bda9020e 3745 if (ret == 0 && !pio_string_write(vcpu)) {
de7d789a 3746 complete_pio(vcpu);
ad312c7c 3747 if (vcpu->arch.pio.count == 0)
de7d789a
CO		 3748 ret = 1;
3749 }
bda9020e
MT		 3750 }
3751 /* no string PIO read support yet */
de7d789a
CO		 3752
3753 return ret;
3754}
3755EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
3756
c8076604
GH		 3757static void bounce_off(void *info)
3758{
3759 /* nothing */
3760}
3761
c8076604
GH		 3762static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
3763 void *data)
3764{
3765 struct cpufreq_freqs *freq = data;
3766 struct kvm *kvm;
3767 struct kvm_vcpu *vcpu;
3768 int i, send_ipi = 0;
3769
c8076604
GH		 3770 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
3771 return 0;
3772 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
3773 return 0;
0cca7907 3774 per_cpu(cpu_tsc_khz, freq->cpu) = freq->new;
c8076604
GH		 3775
3776 spin_lock(&kvm_lock);
3777 list_for_each_entry(kvm, &vm_list, vm_list) {
988a2cae 3778 kvm_for_each_vcpu(i, vcpu, kvm) {
c8076604
GH		 3779 if (vcpu->cpu != freq->cpu)
3780 continue;
3781 if (!kvm_request_guest_time_update(vcpu))
3782 continue;
3783 if (vcpu->cpu != smp_processor_id())
3784 send_ipi++;
3785 }
3786 }
3787 spin_unlock(&kvm_lock);
3788
3789 if (freq->old < freq->new && send_ipi) {
3790 /*
3791 * We upscale the frequency. Must make the guest
3792 * doesn't see old kvmclock values while running with
3793 * the new frequency, otherwise we risk the guest sees
3794 * time go backwards.
3795 *
3796 * In case we update the frequency for another cpu
3797 * (which might be in guest context) send an interrupt
3798 * to kick the cpu out of guest context. Next time
3799 * guest context is entered kvmclock will be updated,
3800 * so the guest will not see stale values.
3801 */
3802 smp_call_function_single(freq->cpu, bounce_off, NULL, 1);
3803 }
3804 return 0;
3805}
3806
3807static struct notifier_block kvmclock_cpufreq_notifier_block = {
3808 .notifier_call = kvmclock_cpufreq_notifier
3809};
3810
b820cc0c
ZA		 3811static void kvm_timer_init(void)
3812{
3813 int cpu;
3814
b820cc0c 3815 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
b820cc0c
ZA		 3816 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
3817 CPUFREQ_TRANSITION_NOTIFIER);
6b7d7e76
ZA		 3818 for_each_online_cpu(cpu) {
3819 unsigned long khz = cpufreq_get(cpu);
3820 if (!khz)
3821 khz = tsc_khz;
3822 per_cpu(cpu_tsc_khz, cpu) = khz;
3823 }
0cca7907
ZA		 3824 } else {
3825 for_each_possible_cpu(cpu)
3826 per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
b820cc0c
ZA		 3827 }
3828}
3829
f8c16bba 3830int kvm_arch_init(void *opaque)
043405e1 3831{
b820cc0c 3832 int r;
f8c16bba
ZX		 3833 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
3834
f8c16bba
ZX		 3835 if (kvm_x86_ops) {
3836 printk(KERN_ERR "kvm: already loaded the other module\n");
56c6d28a
ZX		 3837 r = -EEXIST;
3838 goto out;
f8c16bba
ZX		 3839 }
3840
3841 if (!ops->cpu_has_kvm_support()) {
3842 printk(KERN_ERR "kvm: no hardware support\n");
56c6d28a
ZX		 3843 r = -EOPNOTSUPP;
3844 goto out;
f8c16bba
ZX		 3845 }
3846 if (ops->disabled_by_bios()) {
3847 printk(KERN_ERR "kvm: disabled by bios\n");
56c6d28a
ZX		 3848 r = -EOPNOTSUPP;
3849 goto out;
f8c16bba
ZX		 3850 }
3851
97db56ce
AK		 3852 r = kvm_mmu_module_init();
3853 if (r)
3854 goto out;
3855
3856 kvm_init_msr_list();
3857
f8c16bba 3858 kvm_x86_ops = ops;
56c6d28a 3859 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
7b52345e
SY		 3860 kvm_mmu_set_base_ptes(PT_PRESENT_MASK);
3861 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
4b12f0de 3862 PT_DIRTY_MASK, PT64_NX_MASK, 0);
c8076604 3863
b820cc0c 3864 kvm_timer_init();
c8076604 3865
f8c16bba 3866 return 0;
56c6d28a
ZX		 3867
3868out:
56c6d28a 3869 return r;
043405e1 3870}
8776e519 3871
f8c16bba
ZX		 3872void kvm_arch_exit(void)
3873{
888d256e
JK		 3874 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
3875 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
3876 CPUFREQ_TRANSITION_NOTIFIER);
f8c16bba 3877 kvm_x86_ops = NULL;
56c6d28a
ZX		 3878 kvm_mmu_module_exit();
3879}
f8c16bba 3880
8776e519
HB		 3881int kvm_emulate_halt(struct kvm_vcpu *vcpu)
3882{
3883 ++vcpu->stat.halt_exits;
3884 if (irqchip_in_kernel(vcpu->kvm)) {
a4535290 3885 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
8776e519
HB		 3886 return 1;
3887 } else {
3888 vcpu->run->exit_reason = KVM_EXIT_HLT;
3889 return 0;
3890 }
3891}
3892EXPORT_SYMBOL_GPL(kvm_emulate_halt);
3893
2f333bcb
MT		 3894static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0,
3895 unsigned long a1)
3896{
3897 if (is_long_mode(vcpu))
3898 return a0;
3899 else
3900 return a0 | ((gpa_t)a1 << 32);
3901}
3902
55cd8e5a
GN		 3903int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
3904{
3905 u64 param, ingpa, outgpa, ret;
3906 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
3907 bool fast, longmode;
3908 int cs_db, cs_l;
3909
3910 /*
3911 * hypercall generates UD from non zero cpl and real mode
3912 * per HYPER-V spec
3913 */
3eeb3288 3914 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
55cd8e5a
GN		 3915 kvm_queue_exception(vcpu, UD_VECTOR);
3916 return 0;
3917 }
3918
3919 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
3920 longmode = is_long_mode(vcpu) && cs_l == 1;
3921
3922 if (!longmode) {
ccd46936
GN		 3923 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
3924 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
3925 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
3926 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
3927 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
3928 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
55cd8e5a
GN		 3929 }
3930#ifdef CONFIG_X86_64
3931 else {
3932 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
3933 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
3934 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
3935 }
3936#endif
3937
3938 code = param & 0xffff;
3939 fast = (param >> 16) & 0x1;
3940 rep_cnt = (param >> 32) & 0xfff;
3941 rep_idx = (param >> 48) & 0xfff;
3942
3943 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
3944
c25bc163
GN		 3945 switch (code) {
3946 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
3947 kvm_vcpu_on_spin(vcpu);
3948 break;
3949 default:
3950 res = HV_STATUS_INVALID_HYPERCALL_CODE;
3951 break;
3952 }
55cd8e5a
GN		 3953
3954 ret = res | (((u64)rep_done & 0xfff) << 32);
3955 if (longmode) {
3956 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
3957 } else {
3958 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
3959 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
3960 }
3961
3962 return 1;
3963}
3964
8776e519
HB		 3965int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
3966{
3967 unsigned long nr, a0, a1, a2, a3, ret;
2f333bcb 3968 int r = 1;
8776e519 3969
55cd8e5a
GN		 3970 if (kvm_hv_hypercall_enabled(vcpu->kvm))
3971 return kvm_hv_hypercall(vcpu);
3972
5fdbf976
MT		 3973 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
3974 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
3975 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
3976 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
3977 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
8776e519 3978
229456fc 3979 trace_kvm_hypercall(nr, a0, a1, a2, a3);
2714d1d3 3980
8776e519
HB		 3981 if (!is_long_mode(vcpu)) {
3982 nr &= 0xFFFFFFFF;
3983 a0 &= 0xFFFFFFFF;
3984 a1 &= 0xFFFFFFFF;
3985 a2 &= 0xFFFFFFFF;
3986 a3 &= 0xFFFFFFFF;
3987 }
3988
07708c4a
JK		 3989 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
3990 ret = -KVM_EPERM;
3991 goto out;
3992 }
3993
8776e519 3994 switch (nr) {
b93463aa
AK		 3995 case KVM_HC_VAPIC_POLL_IRQ:
3996 ret = 0;
3997 break;
2f333bcb
MT		 3998 case KVM_HC_MMU_OP:
3999 r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret);
4000 break;
8776e519
HB		 4001 default:
4002 ret = -KVM_ENOSYS;
4003 break;
4004 }
07708c4a 4005out:
5fdbf976 4006 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
f11c3a8d 4007 ++vcpu->stat.hypercalls;
2f333bcb 4008 return r;
8776e519
HB		 4009}
4010EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
4011
4012int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
4013{
4014 char instruction[3];
5fdbf976 4015 unsigned long rip = kvm_rip_read(vcpu);
8776e519 4016
8776e519
HB		 4017 /*
4018 * Blow out the MMU to ensure that no other VCPU has an active mapping
4019 * to ensure that the updated hypercall appears atomically across all
4020 * VCPUs.
4021 */
4022 kvm_mmu_zap_all(vcpu->kvm);
4023
8776e519 4024 kvm_x86_ops->patch_hypercall(vcpu, instruction);
8776e519 4025
4a5f48f6 4026 return __emulator_write_emulated(rip, instruction, 3, vcpu, false);
8776e519
HB		 4027}
4028
4029static u64 mk_cr_64(u64 curr_cr, u32 new_val)
4030{
4031 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
4032}
4033
4034void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
4035{
89a27f4d 4036 struct desc_ptr dt = { limit, base };
8776e519
HB		 4037
4038 kvm_x86_ops->set_gdt(vcpu, &dt);
4039}
4040
4041void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
4042{
89a27f4d 4043 struct desc_ptr dt = { limit, base };
8776e519
HB		 4044
4045 kvm_x86_ops->set_idt(vcpu, &dt);
4046}
4047
4048void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
4049 unsigned long *rflags)
4050{
2d3ad1f4 4051 kvm_lmsw(vcpu, msw);
91586a3b 4052 *rflags = kvm_get_rflags(vcpu);
8776e519
HB		 4053}
4054
4055unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
4056{
54e445ca
JR		 4057 unsigned long value;
4058
8776e519
HB		 4059 switch (cr) {
4060 case 0:
4d4ec087 4061 value = kvm_read_cr0(vcpu);
54e445ca 4062 break;
8776e519 4063 case 2:
54e445ca
JR		 4064 value = vcpu->arch.cr2;
4065 break;
8776e519 4066 case 3:
54e445ca
JR		 4067 value = vcpu->arch.cr3;
4068 break;
8776e519 4069 case 4:
fc78f519 4070 value = kvm_read_cr4(vcpu);
54e445ca 4071 break;
152ff9be 4072 case 8:
54e445ca
JR		 4073 value = kvm_get_cr8(vcpu);
4074 break;
8776e519 4075 default:
b8688d51 4076 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
8776e519
HB		 4077 return 0;
4078 }
54e445ca
JR		 4079
4080 return value;
8776e519
HB		 4081}
4082
49c6799a 4083void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val)
8776e519
HB		 4084{
4085 switch (cr) {
4086 case 0:
4d4ec087 4087 kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
8776e519
HB		 4088 break;
4089 case 2:
ad312c7c 4090 vcpu->arch.cr2 = val;
8776e519
HB		 4091 break;
4092 case 3:
2d3ad1f4 4093 kvm_set_cr3(vcpu, val);
8776e519
HB		 4094 break;
4095 case 4:
fc78f519 4096 kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
8776e519 4097 break;
152ff9be 4098 case 8:
2d3ad1f4 4099 kvm_set_cr8(vcpu, val & 0xfUL);
152ff9be 4100 break;
8776e519 4101 default:
b8688d51 4102 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
8776e519
HB		 4103 }
4104}
4105
07716717
DK		 4106static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
4107{
ad312c7c
ZX		 4108 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
4109 int j, nent = vcpu->arch.cpuid_nent;
07716717
DK		 4110
4111 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
4112 /* when no next entry is found, the current entry[i] is reselected */
0fdf8e59 4113 for (j = i + 1; ; j = (j + 1) % nent) {
ad312c7c 4114 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
07716717
DK		 4115 if (ej->function == e->function) {
4116 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
4117 return j;
4118 }
4119 }
4120 return 0; /* silence gcc, even though control never reaches here */
4121}
4122
4123/* find an entry with matching function, matching index (if needed), and that
4124 * should be read next (if it's stateful) */
4125static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
4126 u32 function, u32 index)
4127{
4128 if (e->function != function)
4129 return 0;
4130 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
4131 return 0;
4132 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
19355475 4133 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
07716717
DK		 4134 return 0;
4135 return 1;
4136}
4137
d8017474
AG		 4138struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
4139 u32 function, u32 index)
8776e519
HB		 4140{
4141 int i;
d8017474 4142 struct kvm_cpuid_entry2 *best = NULL;
8776e519 4143
ad312c7c 4144 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
d8017474
AG		 4145 struct kvm_cpuid_entry2 *e;
4146
ad312c7c 4147 e = &vcpu->arch.cpuid_entries[i];
07716717
DK		 4148 if (is_matching_cpuid_entry(e, function, index)) {
4149 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
4150 move_to_next_stateful_cpuid_entry(vcpu, i);
8776e519
HB		 4151 best = e;
4152 break;
4153 }
4154 /*
4155 * Both basic or both extended?
4156 */
4157 if (((e->function ^ function) & 0x80000000) == 0)
4158 if (!best || e->function > best->function)
4159 best = e;
4160 }
d8017474
AG		 4161 return best;
4162}
0e851880 4163EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry);
d8017474 4164
82725b20
DE		 4165int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
4166{
4167 struct kvm_cpuid_entry2 *best;
4168
4169 best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
4170 if (best)
4171 return best->eax & 0xff;
4172 return 36;
4173}
4174
d8017474
AG		 4175void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
4176{
4177 u32 function, index;
4178 struct kvm_cpuid_entry2 *best;
4179
4180 function = kvm_register_read(vcpu, VCPU_REGS_RAX);
4181 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
4182 kvm_register_write(vcpu, VCPU_REGS_RAX, 0);
4183 kvm_register_write(vcpu, VCPU_REGS_RBX, 0);
4184 kvm_register_write(vcpu, VCPU_REGS_RCX, 0);
4185 kvm_register_write(vcpu, VCPU_REGS_RDX, 0);
4186 best = kvm_find_cpuid_entry(vcpu, function, index);
8776e519 4187 if (best) {
5fdbf976
MT		 4188 kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax);
4189 kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx);
4190 kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx);
4191 kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx);
8776e519 4192 }
8776e519 4193 kvm_x86_ops->skip_emulated_instruction(vcpu);
229456fc
MT		 4194 trace_kvm_cpuid(function,
4195 kvm_register_read(vcpu, VCPU_REGS_RAX),
4196 kvm_register_read(vcpu, VCPU_REGS_RBX),
4197 kvm_register_read(vcpu, VCPU_REGS_RCX),
4198 kvm_register_read(vcpu, VCPU_REGS_RDX));
8776e519
HB		 4199}
4200EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
d0752060 4201
b6c7a5dc
HB		 4202/*
4203 * Check if userspace requested an interrupt window, and that the
4204 * interrupt window is open.
4205 *
4206 * No need to exit to userspace if we already have an interrupt queued.
4207 */
851ba692 4208static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
b6c7a5dc 4209{
8061823a 4210 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
851ba692 4211 vcpu->run->request_interrupt_window &&
5df56646 4212 kvm_arch_interrupt_allowed(vcpu));
b6c7a5dc
HB		 4213}
4214
851ba692 4215static void post_kvm_run_save(struct kvm_vcpu *vcpu)
b6c7a5dc 4216{
851ba692
AK		 4217 struct kvm_run *kvm_run = vcpu->run;
4218
91586a3b 4219 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2d3ad1f4 4220 kvm_run->cr8 = kvm_get_cr8(vcpu);
b6c7a5dc 4221 kvm_run->apic_base = kvm_get_apic_base(vcpu);
4531220b 4222 if (irqchip_in_kernel(vcpu->kvm))
b6c7a5dc 4223 kvm_run->ready_for_interrupt_injection = 1;
4531220b 4224 else
b6c7a5dc 4225 kvm_run->ready_for_interrupt_injection =
fa9726b0
GN		 4226 kvm_arch_interrupt_allowed(vcpu) &&
4227 !kvm_cpu_has_interrupt(vcpu) &&
4228 !kvm_event_needs_reinjection(vcpu);
b6c7a5dc
HB		 4229}
4230
b93463aa
AK		 4231static void vapic_enter(struct kvm_vcpu *vcpu)
4232{
4233 struct kvm_lapic *apic = vcpu->arch.apic;
4234 struct page *page;
4235
4236 if (!apic || !apic->vapic_addr)
4237 return;
4238
4239 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
72dc67a6
IE		 4240
4241 vcpu->arch.apic->vapic_page = page;
b93463aa
AK		 4242}
4243
4244static void vapic_exit(struct kvm_vcpu *vcpu)
4245{
4246 struct kvm_lapic *apic = vcpu->arch.apic;
f656ce01 4247 int idx;
b93463aa
AK		 4248
4249 if (!apic || !apic->vapic_addr)
4250 return;
4251
f656ce01 4252 idx = srcu_read_lock(&vcpu->kvm->srcu);
b93463aa
AK		 4253 kvm_release_page_dirty(apic->vapic_page);
4254 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
f656ce01 4255 srcu_read_unlock(&vcpu->kvm->srcu, idx);
b93463aa
AK		 4256}
4257
95ba8273
GN		 4258static void update_cr8_intercept(struct kvm_vcpu *vcpu)
4259{
4260 int max_irr, tpr;
4261
4262 if (!kvm_x86_ops->update_cr8_intercept)
4263 return;
4264
88c808fd
AK		 4265 if (!vcpu->arch.apic)
4266 return;
4267
8db3baa2
GN		 4268 if (!vcpu->arch.apic->vapic_addr)
4269 max_irr = kvm_lapic_find_highest_irr(vcpu);
4270 else
4271 max_irr = -1;
95ba8273
GN		 4272
4273 if (max_irr != -1)
4274 max_irr >>= 4;
4275
4276 tpr = kvm_lapic_get_cr8(vcpu);
4277
4278 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
4279}
4280
851ba692 4281static void inject_pending_event(struct kvm_vcpu *vcpu)
95ba8273
GN		 4282{
4283 /* try to reinject previous events if any */
b59bb7bd 4284 if (vcpu->arch.exception.pending) {
5c1c85d0
AK		 4285 trace_kvm_inj_exception(vcpu->arch.exception.nr,
4286 vcpu->arch.exception.has_error_code,
4287 vcpu->arch.exception.error_code);
b59bb7bd
GN		 4288 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
4289 vcpu->arch.exception.has_error_code,
4290 vcpu->arch.exception.error_code);
4291 return;
4292 }
4293
95ba8273
GN		 4294 if (vcpu->arch.nmi_injected) {
4295 kvm_x86_ops->set_nmi(vcpu);
4296 return;
4297 }
4298
4299 if (vcpu->arch.interrupt.pending) {
66fd3f7f 4300 kvm_x86_ops->set_irq(vcpu);
95ba8273
GN		 4301 return;
4302 }
4303
4304 /* try to inject new event if pending */
4305 if (vcpu->arch.nmi_pending) {
4306 if (kvm_x86_ops->nmi_allowed(vcpu)) {
4307 vcpu->arch.nmi_pending = false;
4308 vcpu->arch.nmi_injected = true;
4309 kvm_x86_ops->set_nmi(vcpu);
4310 }
4311 } else if (kvm_cpu_has_interrupt(vcpu)) {
4312 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
66fd3f7f
GN		 4313 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
4314 false);
4315 kvm_x86_ops->set_irq(vcpu);
95ba8273
GN		 4316 }
4317 }
4318}
4319
851ba692 4320static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
b6c7a5dc
HB		 4321{
4322 int r;
6a8b1d13 4323 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
851ba692 4324 vcpu->run->request_interrupt_window;
b6c7a5dc 4325
2e53d63a
MT		 4326 if (vcpu->requests)
4327 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
4328 kvm_mmu_unload(vcpu);
4329
b6c7a5dc
HB		 4330 r = kvm_mmu_reload(vcpu);
4331 if (unlikely(r))
4332 goto out;
4333
2f52d58c
AK		 4334 if (vcpu->requests) {
4335 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
2f599714 4336 __kvm_migrate_timers(vcpu);
c8076604
GH		 4337 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests))
4338 kvm_write_guest_time(vcpu);
4731d4c7
MT		 4339 if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests))
4340 kvm_mmu_sync_roots(vcpu);
d4acf7e7
MT		 4341 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
4342 kvm_x86_ops->tlb_flush(vcpu);
b93463aa
AK		 4343 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
4344 &vcpu->requests)) {
851ba692 4345 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
b93463aa
AK		 4346 r = 0;
4347 goto out;
4348 }
71c4dfaf 4349 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) {
851ba692 4350 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
71c4dfaf
JR		 4351 r = 0;
4352 goto out;
4353 }
02daab21
AK		 4354 if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) {
4355 vcpu->fpu_active = 0;
4356 kvm_x86_ops->fpu_deactivate(vcpu);
4357 }
2f52d58c 4358 }
b93463aa 4359
b6c7a5dc
HB		 4360 preempt_disable();
4361
4362 kvm_x86_ops->prepare_guest_switch(vcpu);
2608d7a1
AK		 4363 if (vcpu->fpu_active)
4364 kvm_load_guest_fpu(vcpu);
b6c7a5dc
HB		 4365
4366 local_irq_disable();
4367
32f88400
MT		 4368 clear_bit(KVM_REQ_KICK, &vcpu->requests);
4369 smp_mb__after_clear_bit();
4370
d7690175 4371 if (vcpu->requests || need_resched() || signal_pending(current)) {
c7f0f24b 4372 set_bit(KVM_REQ_KICK, &vcpu->requests);
6c142801
AK		 4373 local_irq_enable();
4374 preempt_enable();
4375 r = 1;
4376 goto out;
4377 }
4378
851ba692 4379 inject_pending_event(vcpu);
b6c7a5dc 4380
6a8b1d13
GN		 4381 /* enable NMI/IRQ window open exits if needed */
4382 if (vcpu->arch.nmi_pending)
4383 kvm_x86_ops->enable_nmi_window(vcpu);
4384 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
4385 kvm_x86_ops->enable_irq_window(vcpu);
4386
95ba8273 4387 if (kvm_lapic_enabled(vcpu)) {
8db3baa2
GN		 4388 update_cr8_intercept(vcpu);
4389 kvm_lapic_sync_to_vapic(vcpu);
95ba8273 4390 }
b93463aa 4391
f656ce01 4392 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
3200f405 4393
b6c7a5dc
HB		 4394 kvm_guest_enter();
4395
42dbaa5a 4396 if (unlikely(vcpu->arch.switch_db_regs)) {
42dbaa5a
JK		 4397 set_debugreg(0, 7);
4398 set_debugreg(vcpu->arch.eff_db[0], 0);
4399 set_debugreg(vcpu->arch.eff_db[1], 1);
4400 set_debugreg(vcpu->arch.eff_db[2], 2);
4401 set_debugreg(vcpu->arch.eff_db[3], 3);
4402 }
b6c7a5dc 4403
229456fc 4404 trace_kvm_entry(vcpu->vcpu_id);
851ba692 4405 kvm_x86_ops->run(vcpu);
b6c7a5dc 4406
24f1e32c
FW		 4407 /*
4408 * If the guest has used debug registers, at least dr7
4409 * will be disabled while returning to the host.
4410 * If we don't have active breakpoints in the host, we don't
4411 * care about the messed up debug address registers. But if
4412 * we have some of them active, restore the old state.
4413 */
59d8eb53 4414 if (hw_breakpoint_active())
24f1e32c 4415 hw_breakpoint_restore();
42dbaa5a 4416
32f88400 4417 set_bit(KVM_REQ_KICK, &vcpu->requests);
b6c7a5dc
HB		 4418 local_irq_enable();
4419
4420 ++vcpu->stat.exits;
4421
4422 /*
4423 * We must have an instruction between local_irq_enable() and
4424 * kvm_guest_exit(), so the timer interrupt isn't delayed by
4425 * the interrupt shadow. The stat.exits increment will do nicely.
4426 * But we need to prevent reordering, hence this barrier():
4427 */
4428 barrier();
4429
4430 kvm_guest_exit();
4431
4432 preempt_enable();
4433
f656ce01 4434 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
3200f405 4435
b6c7a5dc
HB		 4436 /*
4437 * Profile KVM exit RIPs:
4438 */
4439 if (unlikely(prof_on == KVM_PROFILING)) {
5fdbf976
MT		 4440 unsigned long rip = kvm_rip_read(vcpu);
4441 profile_hit(KVM_PROFILING, (void *)rip);
b6c7a5dc
HB		 4442 }
4443
298101da 4444
b93463aa
AK		 4445 kvm_lapic_sync_from_vapic(vcpu);
4446
851ba692 4447 r = kvm_x86_ops->handle_exit(vcpu);
d7690175
MT		 4448out:
4449 return r;
4450}
b6c7a5dc 4451
09cec754 4452
851ba692 4453static int __vcpu_run(struct kvm_vcpu *vcpu)
d7690175
MT		 4454{
4455 int r;
f656ce01 4456 struct kvm *kvm = vcpu->kvm;
d7690175
MT		 4457
4458 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
1b10bf31
JK		 4459 pr_debug("vcpu %d received sipi with vector # %x\n",
4460 vcpu->vcpu_id, vcpu->arch.sipi_vector);
d7690175 4461 kvm_lapic_reset(vcpu);
5f179287 4462 r = kvm_arch_vcpu_reset(vcpu);
d7690175
MT		 4463 if (r)
4464 return r;
4465 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
b6c7a5dc
HB		 4466 }
4467
f656ce01 4468 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
d7690175
MT		 4469 vapic_enter(vcpu);
4470
4471 r = 1;
4472 while (r > 0) {
af2152f5 4473 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
851ba692 4474 r = vcpu_enter_guest(vcpu);
d7690175 4475 else {
f656ce01 4476 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
d7690175 4477 kvm_vcpu_block(vcpu);
f656ce01 4478 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
d7690175 4479 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
09cec754
GN		 4480 {
4481 switch(vcpu->arch.mp_state) {
4482 case KVM_MP_STATE_HALTED:
d7690175 4483 vcpu->arch.mp_state =
09cec754
GN		 4484 KVM_MP_STATE_RUNNABLE;
4485 case KVM_MP_STATE_RUNNABLE:
4486 break;
4487 case KVM_MP_STATE_SIPI_RECEIVED:
4488 default:
4489 r = -EINTR;
4490 break;
4491 }
4492 }
d7690175
MT		 4493 }
4494
09cec754
GN		 4495 if (r <= 0)
4496 break;
4497
4498 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
4499 if (kvm_cpu_has_pending_timer(vcpu))
4500 kvm_inject_pending_timer_irqs(vcpu);
4501
851ba692 4502 if (dm_request_for_irq_injection(vcpu)) {
09cec754 4503 r = -EINTR;
851ba692 4504 vcpu->run->exit_reason = KVM_EXIT_INTR;
09cec754
GN		 4505 ++vcpu->stat.request_irq_exits;
4506 }
4507 if (signal_pending(current)) {
4508 r = -EINTR;
851ba692 4509 vcpu->run->exit_reason = KVM_EXIT_INTR;
09cec754
GN		 4510 ++vcpu->stat.signal_exits;
4511 }
4512 if (need_resched()) {
f656ce01 4513 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
09cec754 4514 kvm_resched(vcpu);
f656ce01 4515 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
d7690175 4516 }
b6c7a5dc
HB		 4517 }
4518
f656ce01 4519 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
851ba692 4520 post_kvm_run_save(vcpu);
b6c7a5dc 4521
b93463aa
AK		 4522 vapic_exit(vcpu);
4523
b6c7a5dc
HB		 4524 return r;
4525}
4526
4527int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4528{
4529 int r;
4530 sigset_t sigsaved;
4531
4532 vcpu_load(vcpu);
4533
ac9f6dc0
AK		 4534 if (vcpu->sigset_active)
4535 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
4536
a4535290 4537 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
b6c7a5dc 4538 kvm_vcpu_block(vcpu);
d7690175 4539 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
ac9f6dc0
AK		 4540 r = -EAGAIN;
4541 goto out;
b6c7a5dc
HB		 4542 }
4543
b6c7a5dc
HB		 4544 /* re-sync apic's tpr */
4545 if (!irqchip_in_kernel(vcpu->kvm))
2d3ad1f4 4546 kvm_set_cr8(vcpu, kvm_run->cr8);
b6c7a5dc 4547
ad312c7c 4548 if (vcpu->arch.pio.cur_count) {
7567cae1 4549 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
b6c7a5dc 4550 r = complete_pio(vcpu);
7567cae1 4551 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
b6c7a5dc
HB		 4552 if (r)
4553 goto out;
4554 }
b6c7a5dc
HB		 4555 if (vcpu->mmio_needed) {
4556 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
4557 vcpu->mmio_read_completed = 1;
4558 vcpu->mmio_needed = 0;
3200f405 4559
f656ce01 4560 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
851ba692 4561 r = emulate_instruction(vcpu, vcpu->arch.mmio_fault_cr2, 0,
571008da 4562 EMULTYPE_NO_DECODE);
f656ce01 4563 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
b6c7a5dc
HB		 4564 if (r == EMULATE_DO_MMIO) {
4565 /*
4566 * Read-modify-write. Back to userspace.
4567 */
4568 r = 0;
4569 goto out;
4570 }
4571 }
5fdbf976
MT		 4572 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL)
4573 kvm_register_write(vcpu, VCPU_REGS_RAX,
4574 kvm_run->hypercall.ret);
b6c7a5dc 4575
851ba692 4576 r = __vcpu_run(vcpu);
b6c7a5dc
HB		 4577
4578out:
4579 if (vcpu->sigset_active)
4580 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
4581
4582 vcpu_put(vcpu);
4583 return r;
4584}
4585
4586int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
4587{
4588 vcpu_load(vcpu);
4589
5fdbf976
MT		 4590 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
4591 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
4592 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
4593 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
4594 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
4595 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
4596 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
4597 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
b6c7a5dc 4598#ifdef CONFIG_X86_64
5fdbf976
MT		 4599 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
4600 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
4601 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
4602 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
4603 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
4604 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
4605 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
4606 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
b6c7a5dc
HB		 4607#endif
4608
5fdbf976 4609 regs->rip = kvm_rip_read(vcpu);
91586a3b 4610 regs->rflags = kvm_get_rflags(vcpu);
b6c7a5dc
HB		 4611
4612 vcpu_put(vcpu);
4613
4614 return 0;
4615}
4616
4617int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
4618{
4619 vcpu_load(vcpu);
4620
5fdbf976
MT		 4621 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
4622 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
4623 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
4624 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
4625 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
4626 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
4627 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
4628 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
b6c7a5dc 4629#ifdef CONFIG_X86_64
5fdbf976
MT		 4630 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
4631 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
4632 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
4633 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
4634 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
4635 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
4636 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
4637 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
b6c7a5dc
HB		 4638#endif
4639
5fdbf976 4640 kvm_rip_write(vcpu, regs->rip);
91586a3b 4641 kvm_set_rflags(vcpu, regs->rflags);
b6c7a5dc 4642
b4f14abd
JK		 4643 vcpu->arch.exception.pending = false;
4644
b6c7a5dc
HB		 4645 vcpu_put(vcpu);
4646
4647 return 0;
4648}
4649
3e6e0aab
GT		 4650void kvm_get_segment(struct kvm_vcpu *vcpu,
4651 struct kvm_segment *var, int seg)
b6c7a5dc 4652{
14af3f3c 4653 kvm_x86_ops->get_segment(vcpu, var, seg);
b6c7a5dc
HB		 4654}
4655
4656void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
4657{
4658 struct kvm_segment cs;
4659
3e6e0aab 4660 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
b6c7a5dc
HB		 4661 *db = cs.db;
4662 *l = cs.l;
4663}
4664EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
4665
4666int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
4667 struct kvm_sregs *sregs)
4668{
89a27f4d 4669 struct desc_ptr dt;
b6c7a5dc
HB		 4670
4671 vcpu_load(vcpu);
4672
3e6e0aab
GT		 4673 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
4674 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
4675 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
4676 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
4677 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
4678 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
b6c7a5dc 4679
3e6e0aab
GT		 4680 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
4681 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
b6c7a5dc
HB		 4682
4683 kvm_x86_ops->get_idt(vcpu, &dt);
89a27f4d
GN		 4684 sregs->idt.limit = dt.size;
4685 sregs->idt.base = dt.address;
b6c7a5dc 4686 kvm_x86_ops->get_gdt(vcpu, &dt);
89a27f4d
GN		 4687 sregs->gdt.limit = dt.size;
4688 sregs->gdt.base = dt.address;
b6c7a5dc 4689
4d4ec087 4690 sregs->cr0 = kvm_read_cr0(vcpu);
ad312c7c
ZX		 4691 sregs->cr2 = vcpu->arch.cr2;
4692 sregs->cr3 = vcpu->arch.cr3;
fc78f519 4693 sregs->cr4 = kvm_read_cr4(vcpu);
2d3ad1f4 4694 sregs->cr8 = kvm_get_cr8(vcpu);
f6801dff 4695 sregs->efer = vcpu->arch.efer;
b6c7a5dc
HB		 4696 sregs->apic_base = kvm_get_apic_base(vcpu);
4697
923c61bb 4698 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
b6c7a5dc 4699
36752c9b 4700 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
14d0bc1f
GN		 4701 set_bit(vcpu->arch.interrupt.nr,
4702 (unsigned long *)sregs->interrupt_bitmap);
16d7a191 4703
b6c7a5dc
HB		 4704 vcpu_put(vcpu);
4705
4706 return 0;
4707}
4708
62d9f0db
MT		 4709int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
4710 struct kvm_mp_state *mp_state)
4711{
4712 vcpu_load(vcpu);
4713 mp_state->mp_state = vcpu->arch.mp_state;
4714 vcpu_put(vcpu);
4715 return 0;
4716}
4717
4718int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
4719 struct kvm_mp_state *mp_state)
4720{
4721 vcpu_load(vcpu);
4722 vcpu->arch.mp_state = mp_state->mp_state;
4723 vcpu_put(vcpu);
4724 return 0;
4725}
4726
3e6e0aab 4727static void kvm_set_segment(struct kvm_vcpu *vcpu,
b6c7a5dc
HB		 4728 struct kvm_segment *var, int seg)
4729{
14af3f3c 4730 kvm_x86_ops->set_segment(vcpu, var, seg);
b6c7a5dc
HB		 4731}
4732
37817f29
IE		 4733static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector,
4734 struct kvm_segment *kvm_desct)
4735{
46a359e7
AM		 4736 kvm_desct->base = get_desc_base(seg_desc);
4737 kvm_desct->limit = get_desc_limit(seg_desc);
c93cd3a5
MT		 4738 if (seg_desc->g) {
4739 kvm_desct->limit <<= 12;
4740 kvm_desct->limit |= 0xfff;
4741 }
37817f29
IE		 4742 kvm_desct->selector = selector;
4743 kvm_desct->type = seg_desc->type;
4744 kvm_desct->present = seg_desc->p;
4745 kvm_desct->dpl = seg_desc->dpl;
4746 kvm_desct->db = seg_desc->d;
4747 kvm_desct->s = seg_desc->s;
4748 kvm_desct->l = seg_desc->l;
4749 kvm_desct->g = seg_desc->g;
4750 kvm_desct->avl = seg_desc->avl;
4751 if (!selector)
4752 kvm_desct->unusable = 1;
4753 else
4754 kvm_desct->unusable = 0;
4755 kvm_desct->padding = 0;
4756}
4757
b8222ad2
AS		 4758static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu,
4759 u16 selector,
89a27f4d 4760 struct desc_ptr *dtable)
37817f29
IE		 4761{
4762 if (selector & 1 << 2) {
4763 struct kvm_segment kvm_seg;
4764
3e6e0aab 4765 kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR);
37817f29
IE		 4766
4767 if (kvm_seg.unusable)
89a27f4d 4768 dtable->size = 0;
37817f29 4769 else
89a27f4d
GN		 4770 dtable->size = kvm_seg.limit;
4771 dtable->address = kvm_seg.base;
37817f29
IE		 4772 }
4773 else
4774 kvm_x86_ops->get_gdt(vcpu, dtable);
4775}
4776
4777/* allowed just for 8 bytes segments */
4778static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
4779 struct desc_struct *seg_desc)
4780{
89a27f4d 4781 struct desc_ptr dtable;
37817f29 4782 u16 index = selector >> 3;
6f550484
TY		 4783 int ret;
4784 u32 err;
4785 gva_t addr;
37817f29 4786
b8222ad2 4787 get_segment_descriptor_dtable(vcpu, selector, &dtable);
37817f29 4788
89a27f4d 4789 if (dtable.size < index * 8 + 7) {
37817f29 4790 kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc);
c125c607 4791 return X86EMUL_PROPAGATE_FAULT;
37817f29 4792 }
6f550484
TY		 4793 addr = dtable.base + index * 8;
4794 ret = kvm_read_guest_virt_system(addr, seg_desc, sizeof(*seg_desc),
4795 vcpu, &err);
4796 if (ret == X86EMUL_PROPAGATE_FAULT)
4797 kvm_inject_page_fault(vcpu, addr, err);
4798
4799 return ret;
37817f29
IE		 4800}
4801
4802/* allowed just for 8 bytes segments */
4803static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
4804 struct desc_struct *seg_desc)
4805{
89a27f4d 4806 struct desc_ptr dtable;
37817f29
IE		 4807 u16 index = selector >> 3;
4808
b8222ad2 4809 get_segment_descriptor_dtable(vcpu, selector, &dtable);
37817f29 4810
89a27f4d 4811 if (dtable.size < index * 8 + 7)
37817f29 4812 return 1;
89a27f4d 4813 return kvm_write_guest_virt(dtable.address + index*8, seg_desc, sizeof(*seg_desc), vcpu, NULL);
1871c602
GN		 4814}
4815
4816static gpa_t get_tss_base_addr_write(struct kvm_vcpu *vcpu,
4817 struct desc_struct *seg_desc)
4818{
4819 u32 base_addr = get_desc_base(seg_desc);
4820
4821 return kvm_mmu_gva_to_gpa_write(vcpu, base_addr, NULL);
37817f29
IE		 4822}
4823
1871c602 4824static gpa_t get_tss_base_addr_read(struct kvm_vcpu *vcpu,
37817f29
IE		 4825 struct desc_struct *seg_desc)
4826{
46a359e7 4827 u32 base_addr = get_desc_base(seg_desc);
37817f29 4828
1871c602 4829 return kvm_mmu_gva_to_gpa_read(vcpu, base_addr, NULL);
37817f29
IE		 4830}
4831
37817f29
IE		 4832static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg)
4833{
4834 struct kvm_segment kvm_seg;
4835
3e6e0aab 4836 kvm_get_segment(vcpu, &kvm_seg, seg);
37817f29
IE		 4837 return kvm_seg.selector;
4838}
4839
2259e3a7 4840static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg)
f4bbd9aa
AK		 4841{
4842 struct kvm_segment segvar = {
4843 .base = selector << 4,
4844 .limit = 0xffff,
4845 .selector = selector,
4846 .type = 3,
4847 .present = 1,
4848 .dpl = 3,
4849 .db = 0,
4850 .s = 1,
4851 .l = 0,
4852 .g = 0,
4853 .avl = 0,
4854 .unusable = 0,
4855 };
4856 kvm_x86_ops->set_segment(vcpu, &segvar, seg);
c697518a 4857 return X86EMUL_CONTINUE;
f4bbd9aa
AK		 4858}
4859
c0c7c04b
AL		 4860static int is_vm86_segment(struct kvm_vcpu *vcpu, int seg)
4861{
4862 return (seg != VCPU_SREG_LDTR) &&
4863 (seg != VCPU_SREG_TR) &&
91586a3b 4864 (kvm_get_rflags(vcpu) & X86_EFLAGS_VM);
c0c7c04b
AL		 4865}
4866
c697518a 4867int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg)
37817f29
IE		 4868{
4869 struct kvm_segment kvm_seg;
e01c2426 4870 struct desc_struct seg_desc;
c697518a
GN		 4871 u8 dpl, rpl, cpl;
4872 unsigned err_vec = GP_VECTOR;
4873 u32 err_code = 0;
4874 bool null_selector = !(selector & ~0x3); /* 0000-0003 are null */
4875 int ret;
37817f29 4876
3eeb3288 4877 if (is_vm86_segment(vcpu, seg) || !is_protmode(vcpu))
f4bbd9aa 4878 return kvm_load_realmode_segment(vcpu, selector, seg);
e01c2426 4879
c697518a
GN		 4880 /* NULL selector is not valid for TR, CS and SS */
4881 if ((seg == VCPU_SREG_CS || seg == VCPU_SREG_SS || seg == VCPU_SREG_TR)
4882 && null_selector)
4883 goto exception;
4884
4885 /* TR should be in GDT only */
4886 if (seg == VCPU_SREG_TR && (selector & (1 << 2)))
4887 goto exception;
4888
4889 ret = load_guest_segment_descriptor(vcpu, selector, &seg_desc);
4890 if (ret)
4891 return ret;
4892
e01c2426 4893 seg_desct_to_kvm_desct(&seg_desc, selector, &kvm_seg);
cb84b55f 4894
c697518a
GN		 4895 if (null_selector) { /* for NULL selector skip all following checks */
4896 kvm_seg.unusable = 1;
4897 goto load;
4898 }
37817f29 4899
c697518a
GN		 4900 err_code = selector & 0xfffc;
4901 err_vec = GP_VECTOR;
37817f29 4902
c697518a
GN		 4903 /* can't load system descriptor into segment selecor */
4904 if (seg <= VCPU_SREG_GS && !kvm_seg.s)
4905 goto exception;
4906
4907 if (!kvm_seg.present) {
4908 err_vec = (seg == VCPU_SREG_SS) ? SS_VECTOR : NP_VECTOR;
4909 goto exception;
4910 }
4911
4912 rpl = selector & 3;
4913 dpl = kvm_seg.dpl;
4914 cpl = kvm_x86_ops->get_cpl(vcpu);
4915
4916 switch (seg) {
4917 case VCPU_SREG_SS:
4918 /*
4919 * segment is not a writable data segment or segment
4920 * selector's RPL != CPL or segment selector's RPL != CPL
4921 */
4922 if (rpl != cpl || (kvm_seg.type & 0xa) != 0x2 || dpl != cpl)
4923 goto exception;
4924 break;
4925 case VCPU_SREG_CS:
4926 if (!(kvm_seg.type & 8))
4927 goto exception;
4928
4929 if (kvm_seg.type & 4) {
4930 /* conforming */
4931 if (dpl > cpl)
4932 goto exception;
4933 } else {
4934 /* nonconforming */
4935 if (rpl > cpl || dpl != cpl)
4936 goto exception;
4937 }
4938 /* CS(RPL) <- CPL */
4939 selector = (selector & 0xfffc) | cpl;
4940 break;
4941 case VCPU_SREG_TR:
4942 if (kvm_seg.s || (kvm_seg.type != 1 && kvm_seg.type != 9))
4943 goto exception;
4944 break;
4945 case VCPU_SREG_LDTR:
4946 if (kvm_seg.s || kvm_seg.type != 2)
4947 goto exception;
4948 break;
4949 default: /* DS, ES, FS, or GS */
4950 /*
4951 * segment is not a data or readable code segment or
4952 * ((segment is a data or nonconforming code segment)
4953 * and (both RPL and CPL > DPL))
4954 */
4955 if ((kvm_seg.type & 0xa) == 0x8 ||
4956 (((kvm_seg.type & 0xc) != 0xc) && (rpl > dpl && cpl > dpl)))
4957 goto exception;
4958 break;
4959 }
4960
4961 if (!kvm_seg.unusable && kvm_seg.s) {
e01c2426 4962 /* mark segment as accessed */
c697518a 4963 kvm_seg.type |= 1;
e01c2426
GN		 4964 seg_desc.type |= 1;
4965 save_guest_segment_descriptor(vcpu, selector, &seg_desc);
4966 }
c697518a
GN		 4967load:
4968 kvm_set_segment(vcpu, &kvm_seg, seg);
4969 return X86EMUL_CONTINUE;
4970exception:
4971 kvm_queue_exception_e(vcpu, err_vec, err_code);
4972 return X86EMUL_PROPAGATE_FAULT;
37817f29
IE		 4973}
4974
4975static void save_state_to_tss32(struct kvm_vcpu *vcpu,
4976 struct tss_segment_32 *tss)
4977{
4978 tss->cr3 = vcpu->arch.cr3;
5fdbf976 4979 tss->eip = kvm_rip_read(vcpu);
91586a3b 4980 tss->eflags = kvm_get_rflags(vcpu);
5fdbf976
MT		 4981 tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX);
4982 tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX);
4983 tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX);
4984 tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX);
4985 tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP);
4986 tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP);
4987 tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI);
4988 tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI);
37817f29
IE		 4989 tss->es = get_segment_selector(vcpu, VCPU_SREG_ES);
4990 tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS);
4991 tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS);
4992 tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS);
4993 tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS);
4994 tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS);
4995 tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR);
37817f29
IE		 4996}
4997
c697518a
GN		 4998static void kvm_load_segment_selector(struct kvm_vcpu *vcpu, u16 sel, int seg)
4999{
5000 struct kvm_segment kvm_seg;
5001 kvm_get_segment(vcpu, &kvm_seg, seg);
5002 kvm_seg.selector = sel;
5003 kvm_set_segment(vcpu, &kvm_seg, seg);
5004}
5005
37817f29
IE		 5006static int load_state_from_tss32(struct kvm_vcpu *vcpu,
5007 struct tss_segment_32 *tss)
5008{
5009 kvm_set_cr3(vcpu, tss->cr3);
5010
5fdbf976 5011 kvm_rip_write(vcpu, tss->eip);
91586a3b 5012 kvm_set_rflags(vcpu, tss->eflags | 2);
37817f29 5013
5fdbf976
MT		 5014 kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax);
5015 kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx);
5016 kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx);
5017 kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx);
5018 kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp);
5019 kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp);
5020 kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi);
5021 kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi);
37817f29 5022
c697518a
GN		 5023 /*
5024 * SDM says that segment selectors are loaded before segment
5025 * descriptors
5026 */
5027 kvm_load_segment_selector(vcpu, tss->ldt_selector, VCPU_SREG_LDTR);
5028 kvm_load_segment_selector(vcpu, tss->es, VCPU_SREG_ES);
5029 kvm_load_segment_selector(vcpu, tss->cs, VCPU_SREG_CS);
5030 kvm_load_segment_selector(vcpu, tss->ss, VCPU_SREG_SS);
5031 kvm_load_segment_selector(vcpu, tss->ds, VCPU_SREG_DS);
5032 kvm_load_segment_selector(vcpu, tss->fs, VCPU_SREG_FS);
5033 kvm_load_segment_selector(vcpu, tss->gs, VCPU_SREG_GS);
5034
5035 /*
5036 * Now load segment descriptors. If fault happenes at this stage
5037 * it is handled in a context of new task
5038 */
5039 if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, VCPU_SREG_LDTR))
37817f29
IE		 5040 return 1;
5041
c697518a 5042 if (kvm_load_segment_descriptor(vcpu, tss->es, VCPU_SREG_ES))
37817f29
IE		 5043 return 1;
5044
c697518a 5045 if (kvm_load_segment_descriptor(vcpu, tss->cs, VCPU_SREG_CS))
37817f29
IE		 5046 return 1;
5047
c697518a 5048 if (kvm_load_segment_descriptor(vcpu, tss->ss, VCPU_SREG_SS))
37817f29
IE		 5049 return 1;
5050
c697518a 5051 if (kvm_load_segment_descriptor(vcpu, tss->ds, VCPU_SREG_DS))
37817f29
IE		 5052 return 1;
5053
c697518a 5054 if (kvm_load_segment_descriptor(vcpu, tss->fs, VCPU_SREG_FS))
37817f29
IE		 5055 return 1;
5056
c697518a 5057 if (kvm_load_segment_descriptor(vcpu, tss->gs, VCPU_SREG_GS))
37817f29
IE		 5058 return 1;
5059 return 0;
5060}
5061
5062static void save_state_to_tss16(struct kvm_vcpu *vcpu,
5063 struct tss_segment_16 *tss)
5064{
5fdbf976 5065 tss->ip = kvm_rip_read(vcpu);
91586a3b 5066 tss->flag = kvm_get_rflags(vcpu);
5fdbf976
MT		 5067 tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX);
5068 tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX);
5069 tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX);
5070 tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX);
5071 tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP);
5072 tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP);
5073 tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI);
5074 tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI);
37817f29
IE		 5075
5076 tss->es = get_segment_selector(vcpu, VCPU_SREG_ES);
5077 tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS);
5078 tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS);
5079 tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS);
5080 tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR);
37817f29
IE		 5081}
5082
5083static int load_state_from_tss16(struct kvm_vcpu *vcpu,
5084 struct tss_segment_16 *tss)
5085{
5fdbf976 5086 kvm_rip_write(vcpu, tss->ip);
91586a3b 5087 kvm_set_rflags(vcpu, tss->flag | 2);
5fdbf976
MT		 5088 kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax);
5089 kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx);
5090 kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx);
5091 kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx);
5092 kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp);
5093 kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp);
5094 kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si);
5095 kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di);
37817f29 5096
c697518a
GN		 5097 /*
5098 * SDM says that segment selectors are loaded before segment
5099 * descriptors
5100 */
5101 kvm_load_segment_selector(vcpu, tss->ldt, VCPU_SREG_LDTR);
5102 kvm_load_segment_selector(vcpu, tss->es, VCPU_SREG_ES);
5103 kvm_load_segment_selector(vcpu, tss->cs, VCPU_SREG_CS);
5104 kvm_load_segment_selector(vcpu, tss->ss, VCPU_SREG_SS);
5105 kvm_load_segment_selector(vcpu, tss->ds, VCPU_SREG_DS);
5106
5107 /*
5108 * Now load segment descriptors. If fault happenes at this stage
5109 * it is handled in a context of new task
5110 */
5111 if (kvm_load_segment_descriptor(vcpu, tss->ldt, VCPU_SREG_LDTR))
37817f29
IE		 5112 return 1;
5113
c697518a 5114 if (kvm_load_segment_descriptor(vcpu, tss->es, VCPU_SREG_ES))
37817f29
IE		 5115 return 1;
5116
c697518a 5117 if (kvm_load_segment_descriptor(vcpu, tss->cs, VCPU_SREG_CS))
37817f29
IE		 5118 return 1;
5119
c697518a 5120 if (kvm_load_segment_descriptor(vcpu, tss->ss, VCPU_SREG_SS))
37817f29
IE		 5121 return 1;
5122
c697518a 5123 if (kvm_load_segment_descriptor(vcpu, tss->ds, VCPU_SREG_DS))
37817f29
IE		 5124 return 1;
5125 return 0;
5126}
5127
8b2cf73c 5128static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector,
b237ac37
GN		 5129 u16 old_tss_sel, u32 old_tss_base,
5130 struct desc_struct *nseg_desc)
37817f29
IE		 5131{
5132 struct tss_segment_16 tss_segment_16;
5133 int ret = 0;
5134
34198bf8
MT		 5135 if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16,
5136 sizeof tss_segment_16))
37817f29
IE		 5137 goto out;
5138
5139 save_state_to_tss16(vcpu, &tss_segment_16);
37817f29 5140
34198bf8
MT		 5141 if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16,
5142 sizeof tss_segment_16))
37817f29 5143 goto out;
34198bf8 5144
1871c602 5145 if (kvm_read_guest(vcpu->kvm, get_tss_base_addr_read(vcpu, nseg_desc),
34198bf8
MT		 5146 &tss_segment_16, sizeof tss_segment_16))
5147 goto out;
5148
b237ac37
GN		 5149 if (old_tss_sel != 0xffff) {
5150 tss_segment_16.prev_task_link = old_tss_sel;
5151
5152 if (kvm_write_guest(vcpu->kvm,
1871c602 5153 get_tss_base_addr_write(vcpu, nseg_desc),
b237ac37
GN		 5154 &tss_segment_16.prev_task_link,
5155 sizeof tss_segment_16.prev_task_link))
5156 goto out;
5157 }
5158
37817f29
IE		 5159 if (load_state_from_tss16(vcpu, &tss_segment_16))
5160 goto out;
5161
5162 ret = 1;
5163out:
5164 return ret;
5165}
5166
8b2cf73c 5167static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector,
b237ac37 5168 u16 old_tss_sel, u32 old_tss_base,
37817f29
IE		 5169 struct desc_struct *nseg_desc)
5170{
5171 struct tss_segment_32 tss_segment_32;
5172 int ret = 0;
5173
34198bf8
MT		 5174 if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32,
5175 sizeof tss_segment_32))
37817f29
IE		 5176 goto out;
5177
5178 save_state_to_tss32(vcpu, &tss_segment_32);
37817f29 5179
34198bf8
MT		 5180 if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32,
5181 sizeof tss_segment_32))
5182 goto out;
5183
1871c602 5184 if (kvm_read_guest(vcpu->kvm, get_tss_base_addr_read(vcpu, nseg_desc),
34198bf8 5185 &tss_segment_32, sizeof tss_segment_32))
37817f29 5186 goto out;
34198bf8 5187
b237ac37
GN		 5188 if (old_tss_sel != 0xffff) {
5189 tss_segment_32.prev_task_link = old_tss_sel;
5190
5191 if (kvm_write_guest(vcpu->kvm,
1871c602 5192 get_tss_base_addr_write(vcpu, nseg_desc),
b237ac37
GN		 5193 &tss_segment_32.prev_task_link,
5194 sizeof tss_segment_32.prev_task_link))
5195 goto out;
5196 }
5197
37817f29
IE		 5198 if (load_state_from_tss32(vcpu, &tss_segment_32))
5199 goto out;
5200
5201 ret = 1;
5202out:
5203 return ret;
5204}
5205
5206int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason)
5207{
5208 struct kvm_segment tr_seg;
5209 struct desc_struct cseg_desc;
5210 struct desc_struct nseg_desc;
5211 int ret = 0;
34198bf8
MT		 5212 u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR);
5213 u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR);
e8861cfe 5214 u32 desc_limit;
37817f29 5215
1871c602 5216 old_tss_base = kvm_mmu_gva_to_gpa_write(vcpu, old_tss_base, NULL);
37817f29 5217
34198bf8
MT		 5218 /* FIXME: Handle errors. Failure to read either TSS or their
5219 * descriptors should generate a pagefault.
5220 */
37817f29
IE		 5221 if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc))
5222 goto out;
5223
34198bf8 5224 if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc))
37817f29
IE		 5225 goto out;
5226
37817f29
IE		 5227 if (reason != TASK_SWITCH_IRET) {
5228 int cpl;
5229
5230 cpl = kvm_x86_ops->get_cpl(vcpu);
5231 if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) {
5232 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
5233 return 1;
5234 }
5235 }
5236
e8861cfe
JK		 5237 desc_limit = get_desc_limit(&nseg_desc);
5238 if (!nseg_desc.p ||
5239 ((desc_limit < 0x67 && (nseg_desc.type & 8)) ||
5240 desc_limit < 0x2b)) {
37817f29
IE		 5241 kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc);
5242 return 1;
5243 }
5244
5245 if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) {
3fe913e7 5246 cseg_desc.type &= ~(1 << 1); //clear the B flag
34198bf8 5247 save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc);
37817f29
IE		 5248 }
5249
5250 if (reason == TASK_SWITCH_IRET) {
91586a3b
JK		 5251 u32 eflags = kvm_get_rflags(vcpu);
5252 kvm_set_rflags(vcpu, eflags & ~X86_EFLAGS_NT);
37817f29
IE		 5253 }
5254
b237ac37
GN		 5255 /* set back link to prev task only if NT bit is set in eflags
5256 note that old_tss_sel is not used afetr this point */
5257 if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE)
5258 old_tss_sel = 0xffff;
5259
37817f29 5260 if (nseg_desc.type & 8)
b237ac37
GN		 5261 ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel,
5262 old_tss_base, &nseg_desc);
37817f29 5263 else
b237ac37
GN		 5264 ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel,
5265 old_tss_base, &nseg_desc);
37817f29
IE		 5266
5267 if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) {
91586a3b
JK		 5268 u32 eflags = kvm_get_rflags(vcpu);
5269 kvm_set_rflags(vcpu, eflags | X86_EFLAGS_NT);
37817f29
IE		 5270 }
5271
5272 if (reason != TASK_SWITCH_IRET) {
3fe913e7 5273 nseg_desc.type |= (1 << 1);
37817f29
IE		 5274 save_guest_segment_descriptor(vcpu, tss_selector,
5275 &nseg_desc);
5276 }
5277
4d4ec087 5278 kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0(vcpu) | X86_CR0_TS);
37817f29
IE		 5279 seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg);
5280 tr_seg.type = 11;
3e6e0aab 5281 kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR);
37817f29 5282out:
37817f29
IE		 5283 return ret;
5284}
5285EXPORT_SYMBOL_GPL(kvm_task_switch);
5286
b6c7a5dc
HB		 5287int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
5288 struct kvm_sregs *sregs)
5289{
5290 int mmu_reset_needed = 0;
923c61bb 5291 int pending_vec, max_bits;
89a27f4d 5292 struct desc_ptr dt;
b6c7a5dc
HB		 5293
5294 vcpu_load(vcpu);
5295
89a27f4d
GN		 5296 dt.size = sregs->idt.limit;
5297 dt.address = sregs->idt.base;
b6c7a5dc 5298 kvm_x86_ops->set_idt(vcpu, &dt);
89a27f4d
GN		 5299 dt.size = sregs->gdt.limit;
5300 dt.address = sregs->gdt.base;
b6c7a5dc
HB		 5301 kvm_x86_ops->set_gdt(vcpu, &dt);
5302
ad312c7c
ZX		 5303 vcpu->arch.cr2 = sregs->cr2;
5304 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
dc7e795e 5305 vcpu->arch.cr3 = sregs->cr3;
b6c7a5dc 5306
2d3ad1f4 5307 kvm_set_cr8(vcpu, sregs->cr8);
b6c7a5dc 5308
f6801dff 5309 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
b6c7a5dc 5310 kvm_x86_ops->set_efer(vcpu, sregs->efer);
b6c7a5dc
HB		 5311 kvm_set_apic_base(vcpu, sregs->apic_base);
5312
4d4ec087 5313 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
b6c7a5dc 5314 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
d7306163 5315 vcpu->arch.cr0 = sregs->cr0;
b6c7a5dc 5316
fc78f519 5317 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
b6c7a5dc 5318 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
7c93be44 5319 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
ad312c7c 5320 load_pdptrs(vcpu, vcpu->arch.cr3);
7c93be44
MT		 5321 mmu_reset_needed = 1;
5322 }
b6c7a5dc
HB		 5323
5324 if (mmu_reset_needed)
5325 kvm_mmu_reset_context(vcpu);
5326
923c61bb
GN		 5327 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
5328 pending_vec = find_first_bit(
5329 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
5330 if (pending_vec < max_bits) {
66fd3f7f 5331 kvm_queue_interrupt(vcpu, pending_vec, false);
923c61bb
GN		 5332 pr_debug("Set back pending irq %d\n", pending_vec);
5333 if (irqchip_in_kernel(vcpu->kvm))
5334 kvm_pic_clear_isr_ack(vcpu->kvm);
b6c7a5dc
HB		 5335 }
5336
3e6e0aab
GT		 5337 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5338 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5339 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5340 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5341 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5342 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
b6c7a5dc 5343
3e6e0aab
GT		 5344 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5345 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
b6c7a5dc 5346
5f0269f5
ME		 5347 update_cr8_intercept(vcpu);
5348
9c3e4aab 5349 /* Older userspace won't unhalt the vcpu on reset. */
c5af89b6 5350 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
9c3e4aab 5351 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
3eeb3288 5352 !is_protmode(vcpu))
9c3e4aab
MT		 5353 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5354
b6c7a5dc
HB		 5355 vcpu_put(vcpu);
5356
5357 return 0;
5358}
5359
d0bfb940
JK		 5360int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
5361 struct kvm_guest_debug *dbg)
b6c7a5dc 5362{
355be0b9 5363 unsigned long rflags;
ae675ef0 5364 int i, r;
b6c7a5dc
HB		 5365
5366 vcpu_load(vcpu);
5367
4f926bf2
JK		 5368 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
5369 r = -EBUSY;
5370 if (vcpu->arch.exception.pending)
5371 goto unlock_out;
5372 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
5373 kvm_queue_exception(vcpu, DB_VECTOR);
5374 else
5375 kvm_queue_exception(vcpu, BP_VECTOR);
5376 }
5377
91586a3b
JK		 5378 /*
5379 * Read rflags as long as potentially injected trace flags are still
5380 * filtered out.
5381 */
5382 rflags = kvm_get_rflags(vcpu);
355be0b9
JK		 5383
5384 vcpu->guest_debug = dbg->control;
5385 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
5386 vcpu->guest_debug = 0;
5387
5388 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
ae675ef0
JK		 5389 for (i = 0; i < KVM_NR_DB_REGS; ++i)
5390 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
5391 vcpu->arch.switch_db_regs =
5392 (dbg->arch.debugreg[7] & DR7_BP_EN_MASK);
5393 } else {
5394 for (i = 0; i < KVM_NR_DB_REGS; i++)
5395 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
5396 vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
5397 }
5398
f92653ee
JK		 5399 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5400 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
5401 get_segment_base(vcpu, VCPU_SREG_CS);
94fe45da 5402
91586a3b
JK		 5403 /*
5404 * Trigger an rflags update that will inject or remove the trace
5405 * flags.
5406 */
5407 kvm_set_rflags(vcpu, rflags);
b6c7a5dc 5408
355be0b9 5409 kvm_x86_ops->set_guest_debug(vcpu, dbg);
b6c7a5dc 5410
4f926bf2 5411 r = 0;
d0bfb940 5412
4f926bf2 5413unlock_out:
b6c7a5dc
HB		 5414 vcpu_put(vcpu);
5415
5416 return r;
5417}
5418
d0752060
HB		 5419/*
5420 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
5421 * we have asm/x86/processor.h
5422 */
5423struct fxsave {
5424 u16 cwd;
5425 u16 swd;
5426 u16 twd;
5427 u16 fop;
5428 u64 rip;
5429 u64 rdp;
5430 u32 mxcsr;
5431 u32 mxcsr_mask;
5432 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
5433#ifdef CONFIG_X86_64
5434 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
5435#else
5436 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
5437#endif
5438};
5439
8b006791
ZX		 5440/*
5441 * Translate a guest virtual address to a guest physical address.
5442 */
5443int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
5444 struct kvm_translation *tr)
5445{
5446 unsigned long vaddr = tr->linear_address;
5447 gpa_t gpa;
f656ce01 5448 int idx;
8b006791
ZX		 5449
5450 vcpu_load(vcpu);
f656ce01 5451 idx = srcu_read_lock(&vcpu->kvm->srcu);
1871c602 5452 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
f656ce01 5453 srcu_read_unlock(&vcpu->kvm->srcu, idx);
8b006791
ZX		 5454 tr->physical_address = gpa;
5455 tr->valid = gpa != UNMAPPED_GVA;
5456 tr->writeable = 1;
5457 tr->usermode = 0;
8b006791
ZX		 5458 vcpu_put(vcpu);
5459
5460 return 0;
5461}
5462
d0752060
HB		 5463int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5464{
ad312c7c 5465 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
d0752060
HB		 5466
5467 vcpu_load(vcpu);
5468
5469 memcpy(fpu->fpr, fxsave->st_space, 128);
5470 fpu->fcw = fxsave->cwd;
5471 fpu->fsw = fxsave->swd;
5472 fpu->ftwx = fxsave->twd;
5473 fpu->last_opcode = fxsave->fop;
5474 fpu->last_ip = fxsave->rip;
5475 fpu->last_dp = fxsave->rdp;
5476 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
5477
5478 vcpu_put(vcpu);
5479
5480 return 0;
5481}
5482
5483int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5484{
ad312c7c 5485 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
d0752060
HB		 5486
5487 vcpu_load(vcpu);
5488
5489 memcpy(fxsave->st_space, fpu->fpr, 128);
5490 fxsave->cwd = fpu->fcw;
5491 fxsave->swd = fpu->fsw;
5492 fxsave->twd = fpu->ftwx;
5493 fxsave->fop = fpu->last_opcode;
5494 fxsave->rip = fpu->last_ip;
5495 fxsave->rdp = fpu->last_dp;
5496 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
5497
5498 vcpu_put(vcpu);
5499
5500 return 0;
5501}
5502
5503void fx_init(struct kvm_vcpu *vcpu)
5504{
5505 unsigned after_mxcsr_mask;
5506
bc1a34f1
AA		 5507 /*
5508 * Touch the fpu the first time in non atomic context as if
5509 * this is the first fpu instruction the exception handler
5510 * will fire before the instruction returns and it'll have to
5511 * allocate ram with GFP_KERNEL.
5512 */
5513 if (!used_math())
d6e88aec 5514 kvm_fx_save(&vcpu->arch.host_fx_image);
bc1a34f1 5515
d0752060
HB		 5516 /* Initialize guest FPU by resetting ours and saving into guest's */
5517 preempt_disable();
d6e88aec
AK		 5518 kvm_fx_save(&vcpu->arch.host_fx_image);
5519 kvm_fx_finit();
5520 kvm_fx_save(&vcpu->arch.guest_fx_image);
5521 kvm_fx_restore(&vcpu->arch.host_fx_image);
d0752060
HB		 5522 preempt_enable();
5523
ad312c7c 5524 vcpu->arch.cr0 |= X86_CR0_ET;
d0752060 5525 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
ad312c7c
ZX		 5526 vcpu->arch.guest_fx_image.mxcsr = 0x1f80;
5527 memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask,
d0752060
HB		 5528 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
5529}
5530EXPORT_SYMBOL_GPL(fx_init);
5531
5532void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
5533{
2608d7a1 5534 if (vcpu->guest_fpu_loaded)
d0752060
HB		 5535 return;
5536
5537 vcpu->guest_fpu_loaded = 1;
d6e88aec
AK		 5538 kvm_fx_save(&vcpu->arch.host_fx_image);
5539 kvm_fx_restore(&vcpu->arch.guest_fx_image);
0c04851c 5540 trace_kvm_fpu(1);
d0752060 5541}
d0752060
HB		 5542
5543void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
5544{
5545 if (!vcpu->guest_fpu_loaded)
5546 return;
5547
5548 vcpu->guest_fpu_loaded = 0;
d6e88aec
AK		 5549 kvm_fx_save(&vcpu->arch.guest_fx_image);
5550 kvm_fx_restore(&vcpu->arch.host_fx_image);
f096ed85 5551 ++vcpu->stat.fpu_reload;
02daab21 5552 set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
0c04851c 5553 trace_kvm_fpu(0);
d0752060 5554}
e9b11c17
ZX		 5555
5556void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
5557{
7f1ea208
JR		 5558 if (vcpu->arch.time_page) {
5559 kvm_release_page_dirty(vcpu->arch.time_page);
5560 vcpu->arch.time_page = NULL;
5561 }
5562
e9b11c17
ZX		 5563 kvm_x86_ops->vcpu_free(vcpu);
5564}
5565
5566struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
5567 unsigned int id)
5568{
26e5215f
AK		 5569 return kvm_x86_ops->vcpu_create(kvm, id);
5570}
e9b11c17 5571
26e5215f
AK		 5572int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
5573{
5574 int r;
e9b11c17
ZX		 5575
5576 /* We do fxsave: this must be aligned. */
ad312c7c 5577 BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF);
e9b11c17 5578
0bed3b56 5579 vcpu->arch.mtrr_state.have_fixed = 1;
e9b11c17
ZX		 5580 vcpu_load(vcpu);
5581 r = kvm_arch_vcpu_reset(vcpu);
5582 if (r == 0)
5583 r = kvm_mmu_setup(vcpu);
5584 vcpu_put(vcpu);
5585 if (r < 0)
5586 goto free_vcpu;
5587
26e5215f 5588 return 0;
e9b11c17
ZX		 5589free_vcpu:
5590 kvm_x86_ops->vcpu_free(vcpu);
26e5215f 5591 return r;
e9b11c17
ZX		 5592}
5593
d40ccc62 5594void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
e9b11c17
ZX		 5595{
5596 vcpu_load(vcpu);
5597 kvm_mmu_unload(vcpu);
5598 vcpu_put(vcpu);
5599
5600 kvm_x86_ops->vcpu_free(vcpu);
5601}
5602
5603int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
5604{
448fa4a9
JK		 5605 vcpu->arch.nmi_pending = false;
5606 vcpu->arch.nmi_injected = false;
5607
42dbaa5a
JK		 5608 vcpu->arch.switch_db_regs = 0;
5609 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
5610 vcpu->arch.dr6 = DR6_FIXED_1;
5611 vcpu->arch.dr7 = DR7_FIXED_1;
5612
e9b11c17
ZX		 5613 return kvm_x86_ops->vcpu_reset(vcpu);
5614}
5615
10474ae8 5616int kvm_arch_hardware_enable(void *garbage)
e9b11c17 5617{
0cca7907
ZA		 5618 /*
5619 * Since this may be called from a hotplug notifcation,
5620 * we can't get the CPU frequency directly.
5621 */
5622 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
5623 int cpu = raw_smp_processor_id();
5624 per_cpu(cpu_tsc_khz, cpu) = 0;
5625 }
18863bdd
AK		 5626
5627 kvm_shared_msr_cpu_online();
5628
10474ae8 5629 return kvm_x86_ops->hardware_enable(garbage);
e9b11c17
ZX		 5630}
5631
5632void kvm_arch_hardware_disable(void *garbage)
5633{
5634 kvm_x86_ops->hardware_disable(garbage);
3548bab5 5635 drop_user_return_notifiers(garbage);
e9b11c17
ZX		 5636}
5637
5638int kvm_arch_hardware_setup(void)
5639{
5640 return kvm_x86_ops->hardware_setup();
5641}
5642
5643void kvm_arch_hardware_unsetup(void)
5644{
5645 kvm_x86_ops->hardware_unsetup();
5646}
5647
5648void kvm_arch_check_processor_compat(void *rtn)
5649{
5650 kvm_x86_ops->check_processor_compatibility(rtn);
5651}
5652
5653int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
5654{
5655 struct page *page;
5656 struct kvm *kvm;
5657 int r;
5658
5659 BUG_ON(vcpu->kvm == NULL);
5660 kvm = vcpu->kvm;
5661
ad312c7c 5662 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
c5af89b6 5663 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
a4535290 5664 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
e9b11c17 5665 else
a4535290 5666 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
e9b11c17
ZX		 5667
5668 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
5669 if (!page) {
5670 r = -ENOMEM;
5671 goto fail;
5672 }
ad312c7c 5673 vcpu->arch.pio_data = page_address(page);
e9b11c17
ZX		 5674
5675 r = kvm_mmu_create(vcpu);
5676 if (r < 0)
5677 goto fail_free_pio_data;
5678
5679 if (irqchip_in_kernel(kvm)) {
5680 r = kvm_create_lapic(vcpu);
5681 if (r < 0)
5682 goto fail_mmu_destroy;
5683 }
5684
890ca9ae
HY		 5685 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
5686 GFP_KERNEL);
5687 if (!vcpu->arch.mce_banks) {
5688 r = -ENOMEM;
443c39bc 5689 goto fail_free_lapic;
890ca9ae
HY		 5690 }
5691 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
5692
e9b11c17 5693 return 0;
443c39bc
WY		 5694fail_free_lapic:
5695 kvm_free_lapic(vcpu);
e9b11c17
ZX		 5696fail_mmu_destroy:
5697 kvm_mmu_destroy(vcpu);
5698fail_free_pio_data:
ad312c7c 5699 free_page((unsigned long)vcpu->arch.pio_data);
e9b11c17
ZX		 5700fail:
5701 return r;
5702}
5703
5704void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
5705{
f656ce01
MT		 5706 int idx;
5707
36cb93fd 5708 kfree(vcpu->arch.mce_banks);
e9b11c17 5709 kvm_free_lapic(vcpu);
f656ce01 5710 idx = srcu_read_lock(&vcpu->kvm->srcu);
e9b11c17 5711 kvm_mmu_destroy(vcpu);
f656ce01 5712 srcu_read_unlock(&vcpu->kvm->srcu, idx);
ad312c7c 5713 free_page((unsigned long)vcpu->arch.pio_data);
e9b11c17 5714}
d19a9cd2
ZX		 5715
5716struct kvm *kvm_arch_create_vm(void)
5717{
5718 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
5719
5720 if (!kvm)
5721 return ERR_PTR(-ENOMEM);
5722
fef9cce0
MT		 5723 kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
5724 if (!kvm->arch.aliases) {
5725 kfree(kvm);
5726 return ERR_PTR(-ENOMEM);
5727 }
5728
f05e70ac 5729 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
4d5c5d0f 5730 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
d19a9cd2 5731
5550af4d
SY		 5732 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
5733 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
5734
53f658b3
MT		 5735 rdtscll(kvm->arch.vm_init_tsc);
5736
d19a9cd2
ZX		 5737 return kvm;
5738}
5739
5740static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
5741{
5742 vcpu_load(vcpu);
5743 kvm_mmu_unload(vcpu);
5744 vcpu_put(vcpu);
5745}
5746
5747static void kvm_free_vcpus(struct kvm *kvm)
5748{
5749 unsigned int i;
988a2cae 5750 struct kvm_vcpu *vcpu;
d19a9cd2
ZX		 5751
5752 /*
5753 * Unpin any mmu pages first.
5754 */
988a2cae
GN		 5755 kvm_for_each_vcpu(i, vcpu, kvm)
5756 kvm_unload_vcpu_mmu(vcpu);
5757 kvm_for_each_vcpu(i, vcpu, kvm)
5758 kvm_arch_vcpu_free(vcpu);
5759
5760 mutex_lock(&kvm->lock);
5761 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
5762 kvm->vcpus[i] = NULL;
d19a9cd2 5763
988a2cae
GN		 5764 atomic_set(&kvm->online_vcpus, 0);
5765 mutex_unlock(&kvm->lock);
d19a9cd2
ZX		 5766}
5767
ad8ba2cd
SY		 5768void kvm_arch_sync_events(struct kvm *kvm)
5769{
ba4cef31 5770 kvm_free_all_assigned_devices(kvm);
ad8ba2cd
SY		 5771}
5772
d19a9cd2
ZX		 5773void kvm_arch_destroy_vm(struct kvm *kvm)
5774{
6eb55818 5775 kvm_iommu_unmap_guest(kvm);
7837699f 5776 kvm_free_pit(kvm);
d7deeeb0
ZX		 5777 kfree(kvm->arch.vpic);
5778 kfree(kvm->arch.vioapic);
d19a9cd2
ZX		 5779 kvm_free_vcpus(kvm);
5780 kvm_free_physmem(kvm);
3d45830c
AK		 5781 if (kvm->arch.apic_access_page)
5782 put_page(kvm->arch.apic_access_page);
b7ebfb05
SY		 5783 if (kvm->arch.ept_identity_pagetable)
5784 put_page(kvm->arch.ept_identity_pagetable);
64749204 5785 cleanup_srcu_struct(&kvm->srcu);
fef9cce0 5786 kfree(kvm->arch.aliases);
d19a9cd2
ZX		 5787 kfree(kvm);
5788}
0de10343 5789
f7784b8e
MT		 5790int kvm_arch_prepare_memory_region(struct kvm *kvm,
5791 struct kvm_memory_slot *memslot,
0de10343 5792 struct kvm_memory_slot old,
f7784b8e 5793 struct kvm_userspace_memory_region *mem,
0de10343
ZX		 5794 int user_alloc)
5795{
f7784b8e 5796 int npages = memslot->npages;
0de10343
ZX		 5797
5798 /*To keep backward compatibility with older userspace,
5799 *x86 needs to hanlde !user_alloc case.
5800 */
5801 if (!user_alloc) {
5802 if (npages && !old.rmap) {
604b38ac
AA		 5803 unsigned long userspace_addr;
5804
72dc67a6 5805 down_write(&current->mm->mmap_sem);
604b38ac
AA		 5806 userspace_addr = do_mmap(NULL, 0,
5807 npages * PAGE_SIZE,
5808 PROT_READ | PROT_WRITE,
acee3c04 5809 MAP_PRIVATE | MAP_ANONYMOUS,
604b38ac 5810 0);
72dc67a6 5811 up_write(&current->mm->mmap_sem);
0de10343 5812
604b38ac
AA		 5813 if (IS_ERR((void *)userspace_addr))
5814 return PTR_ERR((void *)userspace_addr);
5815
604b38ac 5816 memslot->userspace_addr = userspace_addr;
0de10343
ZX		 5817 }
5818 }
5819
f7784b8e
MT		 5820
5821 return 0;
5822}
5823
5824void kvm_arch_commit_memory_region(struct kvm *kvm,
5825 struct kvm_userspace_memory_region *mem,
5826 struct kvm_memory_slot old,
5827 int user_alloc)
5828{
5829
5830 int npages = mem->memory_size >> PAGE_SHIFT;
5831
5832 if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
5833 int ret;
5834
5835 down_write(&current->mm->mmap_sem);
5836 ret = do_munmap(current->mm, old.userspace_addr,
5837 old.npages * PAGE_SIZE);
5838 up_write(&current->mm->mmap_sem);
5839 if (ret < 0)
5840 printk(KERN_WARNING
5841 "kvm_vm_ioctl_set_memory_region: "
5842 "failed to munmap memory\n");
5843 }
5844
7c8a83b7 5845 spin_lock(&kvm->mmu_lock);
f05e70ac 5846 if (!kvm->arch.n_requested_mmu_pages) {
0de10343
ZX		 5847 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
5848 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
5849 }
5850
5851 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
7c8a83b7 5852 spin_unlock(&kvm->mmu_lock);
0de10343 5853}
1d737c8a 5854
34d4cb8f
MT		 5855void kvm_arch_flush_shadow(struct kvm *kvm)
5856{
5857 kvm_mmu_zap_all(kvm);
8986ecc0 5858 kvm_reload_remote_mmus(kvm);
34d4cb8f
MT		 5859}
5860
1d737c8a
ZX		 5861int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
5862{
a4535290 5863 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE
a1b37100
GN		 5864 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
5865 || vcpu->arch.nmi_pending ||
5866 (kvm_arch_interrupt_allowed(vcpu) &&
5867 kvm_cpu_has_interrupt(vcpu));
1d737c8a 5868}
5736199a 5869
5736199a
ZX		 5870void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
5871{
32f88400
MT		 5872 int me;
5873 int cpu = vcpu->cpu;
5736199a
ZX		 5874
5875 if (waitqueue_active(&vcpu->wq)) {
5876 wake_up_interruptible(&vcpu->wq);
5877 ++vcpu->stat.halt_wakeup;
5878 }
32f88400
MT		 5879
5880 me = get_cpu();
5881 if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
5882 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
5883 smp_send_reschedule(cpu);
e9571ed5 5884 put_cpu();
5736199a 5885}
78646121
GN		 5886
5887int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
5888{
5889 return kvm_x86_ops->interrupt_allowed(vcpu);
5890}
229456fc 5891
f92653ee
JK		 5892bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
5893{
5894 unsigned long current_rip = kvm_rip_read(vcpu) +
5895 get_segment_base(vcpu, VCPU_SREG_CS);
5896
5897 return current_rip == linear_rip;
5898}
5899EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
5900
94fe45da
JK		 5901unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
5902{
5903 unsigned long rflags;
5904
5905 rflags = kvm_x86_ops->get_rflags(vcpu);
5906 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
c310bac5 5907 rflags &= ~X86_EFLAGS_TF;
94fe45da
JK		 5908 return rflags;
5909}
5910EXPORT_SYMBOL_GPL(kvm_get_rflags);
5911
5912void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
5913{
5914 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
f92653ee 5915 kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
c310bac5 5916 rflags |= X86_EFLAGS_TF;
94fe45da
JK		 5917 kvm_x86_ops->set_rflags(vcpu, rflags);
5918}
5919EXPORT_SYMBOL_GPL(kvm_set_rflags);
5920
229456fc
MT		 5921EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
5922EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
5923EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
5924EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
5925EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
0ac406de 5926EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
d8cabddf 5927EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
17897f36 5928EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
236649de 5929EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
ec1ff790 5930EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
532a46b9 5931EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
2e554e8d 5932EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);
Linux kernel - Deliverables
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