projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
KVM: move DR register access handling into generic code
[deliverable/linux.git] / arch / x86 / kvm / x86.c
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.
7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
9 *
10 * Authors:
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 * Amit Shah <amit.shah@qumranet.com>
14 * Ben-Ami Yassour <benami@il.ibm.com>
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
21 #include <linux/kvm_host.h>
22 #include "irq.h"
23 #include "mmu.h"
24 #include "i8254.h"
25 #include "tss.h"
26 #include "kvm_cache_regs.h"
27 #include "x86.h"
28
29 #include <linux/clocksource.h>
30 #include <linux/interrupt.h>
31 #include <linux/kvm.h>
32 #include <linux/fs.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/mman.h>
36 #include <linux/highmem.h>
37 #include <linux/iommu.h>
38 #include <linux/intel-iommu.h>
39 #include <linux/cpufreq.h>
40 #include <linux/user-return-notifier.h>
41 #include <linux/srcu.h>
42 #include <linux/slab.h>
43 #include <trace/events/kvm.h>
44
45 #define CREATE_TRACE_POINTS
46 #include "trace.h"
47
48 #include <asm/debugreg.h>
49 #include <asm/uaccess.h>
50 #include <asm/msr.h>
51 #include <asm/desc.h>
52 #include <asm/mtrr.h>
53 #include <asm/mce.h>
54
55 #define MAX_IO_MSRS 256
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)
67
68 #define KVM_MAX_MCE_BANKS 32
69 #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P
70
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
76 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
77 #else
78 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
79 #endif
80
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
83
84 static void update_cr8_intercept(struct kvm_vcpu *vcpu);
85 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
86 struct kvm_cpuid_entry2 __user *entries);
87
88 struct kvm_x86_ops *kvm_x86_ops;
89 EXPORT_SYMBOL_GPL(kvm_x86_ops);
90
91 int ignore_msrs = 0;
92 module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR);
93
94 #define KVM_NR_SHARED_MSRS 16
95
96 struct kvm_shared_msrs_global {
97 int nr;
98 u32 msrs[KVM_NR_SHARED_MSRS];
99 };
100
101 struct kvm_shared_msrs {
102 struct user_return_notifier urn;
103 bool registered;
104 struct kvm_shared_msr_values {
105 u64 host;
106 u64 curr;
107 } values[KVM_NR_SHARED_MSRS];
108 };
109
110 static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
111 static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
112
113 struct kvm_stats_debugfs_item debugfs_entries[] = {
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) },
123 { "nmi_window", VCPU_STAT(nmi_window_exits) },
124 { "halt_exits", VCPU_STAT(halt_exits) },
125 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
126 { "hypercalls", VCPU_STAT(hypercalls) },
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) },
134 { "irq_injections", VCPU_STAT(irq_injections) },
135 { "nmi_injections", VCPU_STAT(nmi_injections) },
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) },
142 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
143 { "mmu_unsync", VM_STAT(mmu_unsync) },
144 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
145 { "largepages", VM_STAT(lpages) },
146 { NULL }
147 };
148
149 static void kvm_on_user_return(struct user_return_notifier *urn)
150 {
151 unsigned slot;
152 struct kvm_shared_msrs *locals
153 = container_of(urn, struct kvm_shared_msrs, urn);
154 struct kvm_shared_msr_values *values;
155
156 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
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;
161 }
162 }
163 locals->registered = false;
164 user_return_notifier_unregister(urn);
165 }
166
167 static void shared_msr_update(unsigned slot, u32 msr)
168 {
169 struct kvm_shared_msrs *smsr;
170 u64 value;
171
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
184 void kvm_define_shared_msr(unsigned slot, u32 msr)
185 {
186 if (slot >= shared_msrs_global.nr)
187 shared_msrs_global.nr = slot + 1;
188 shared_msrs_global.msrs[slot] = msr;
189 /* we need ensured the shared_msr_global have been updated */
190 smp_wmb();
191 }
192 EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
193
194 static void kvm_shared_msr_cpu_online(void)
195 {
196 unsigned i;
197
198 for (i = 0; i < shared_msrs_global.nr; ++i)
199 shared_msr_update(i, shared_msrs_global.msrs[i]);
200 }
201
202 void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
203 {
204 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
205
206 if (((value ^ smsr->values[slot].curr) & mask) == 0)
207 return;
208 smsr->values[slot].curr = value;
209 wrmsrl(shared_msrs_global.msrs[slot], value);
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 }
216 EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
217
218 static 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
226 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
227 {
228 if (irqchip_in_kernel(vcpu->kvm))
229 return vcpu->arch.apic_base;
230 else
231 return vcpu->arch.apic_base;
232 }
233 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
234
235 void 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
241 vcpu->arch.apic_base = data;
242 }
243 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
244
245 #define EXCPT_BENIGN 0
246 #define EXCPT_CONTRIBUTORY 1
247 #define EXCPT_PF 2
248
249 static 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
266 static 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
304 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
305 {
306 kvm_multiple_exception(vcpu, nr, false, 0);
307 }
308 EXPORT_SYMBOL_GPL(kvm_queue_exception);
309
310 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
311 u32 error_code)
312 {
313 ++vcpu->stat.pf_guest;
314 vcpu->arch.cr2 = addr;
315 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
316 }
317
318 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
319 {
320 vcpu->arch.nmi_pending = 1;
321 }
322 EXPORT_SYMBOL_GPL(kvm_inject_nmi);
323
324 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
325 {
326 kvm_multiple_exception(vcpu, nr, true, error_code);
327 }
328 EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
329
330 /*
331 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
332 * a #GP and return false.
333 */
334 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
335 {
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;
340 }
341 EXPORT_SYMBOL_GPL(kvm_require_cpl);
342
343 /*
344 * Load the pae pdptrs. Return true is they are all valid.
345 */
346 int 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;
352 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
353
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) {
361 if (is_present_gpte(pdpte[i]) &&
362 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
363 ret = 0;
364 goto out;
365 }
366 }
367 ret = 1;
368
369 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
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);
374 out:
375
376 return ret;
377 }
378 EXPORT_SYMBOL_GPL(load_pdptrs);
379
380 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
381 {
382 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
383 bool changed = true;
384 int r;
385
386 if (is_long_mode(vcpu) || !is_pae(vcpu))
387 return false;
388
389 if (!test_bit(VCPU_EXREG_PDPTR,
390 (unsigned long *)&vcpu->arch.regs_avail))
391 return true;
392
393 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
394 if (r < 0)
395 goto out;
396 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
397 out:
398
399 return changed;
400 }
401
402 void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
403 {
404 cr0 |= X86_CR0_ET;
405
406 #ifdef CONFIG_X86_64
407 if (cr0 & 0xffffffff00000000UL) {
408 kvm_inject_gp(vcpu, 0);
409 return;
410 }
411 #endif
412
413 cr0 &= ~CR0_RESERVED_BITS;
414
415 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
416 kvm_inject_gp(vcpu, 0);
417 return;
418 }
419
420 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
421 kvm_inject_gp(vcpu, 0);
422 return;
423 }
424
425 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
426 #ifdef CONFIG_X86_64
427 if ((vcpu->arch.efer & EFER_LME)) {
428 int cs_db, cs_l;
429
430 if (!is_pae(vcpu)) {
431 kvm_inject_gp(vcpu, 0);
432 return;
433 }
434 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
435 if (cs_l) {
436 kvm_inject_gp(vcpu, 0);
437 return;
438
439 }
440 } else
441 #endif
442 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
443 kvm_inject_gp(vcpu, 0);
444 return;
445 }
446
447 }
448
449 kvm_x86_ops->set_cr0(vcpu, cr0);
450
451 kvm_mmu_reset_context(vcpu);
452 return;
453 }
454 EXPORT_SYMBOL_GPL(kvm_set_cr0);
455
456 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
457 {
458 kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0ful) | (msw & 0x0f));
459 }
460 EXPORT_SYMBOL_GPL(kvm_lmsw);
461
462 void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
463 {
464 unsigned long old_cr4 = kvm_read_cr4(vcpu);
465 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE;
466
467 if (cr4 & CR4_RESERVED_BITS) {
468 kvm_inject_gp(vcpu, 0);
469 return;
470 }
471
472 if (is_long_mode(vcpu)) {
473 if (!(cr4 & X86_CR4_PAE)) {
474 kvm_inject_gp(vcpu, 0);
475 return;
476 }
477 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
478 && ((cr4 ^ old_cr4) & pdptr_bits)
479 && !load_pdptrs(vcpu, vcpu->arch.cr3)) {
480 kvm_inject_gp(vcpu, 0);
481 return;
482 }
483
484 if (cr4 & X86_CR4_VMXE) {
485 kvm_inject_gp(vcpu, 0);
486 return;
487 }
488 kvm_x86_ops->set_cr4(vcpu, cr4);
489 vcpu->arch.cr4 = cr4;
490 vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled;
491 kvm_mmu_reset_context(vcpu);
492 }
493 EXPORT_SYMBOL_GPL(kvm_set_cr4);
494
495 void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
496 {
497 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
498 kvm_mmu_sync_roots(vcpu);
499 kvm_mmu_flush_tlb(vcpu);
500 return;
501 }
502
503 if (is_long_mode(vcpu)) {
504 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
505 kvm_inject_gp(vcpu, 0);
506 return;
507 }
508 } else {
509 if (is_pae(vcpu)) {
510 if (cr3 & CR3_PAE_RESERVED_BITS) {
511 kvm_inject_gp(vcpu, 0);
512 return;
513 }
514 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
515 kvm_inject_gp(vcpu, 0);
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
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)))
535 kvm_inject_gp(vcpu, 0);
536 else {
537 vcpu->arch.cr3 = cr3;
538 vcpu->arch.mmu.new_cr3(vcpu);
539 }
540 }
541 EXPORT_SYMBOL_GPL(kvm_set_cr3);
542
543 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
544 {
545 if (cr8 & CR8_RESERVED_BITS) {
546 kvm_inject_gp(vcpu, 0);
547 return;
548 }
549 if (irqchip_in_kernel(vcpu->kvm))
550 kvm_lapic_set_tpr(vcpu, cr8);
551 else
552 vcpu->arch.cr8 = cr8;
553 }
554 EXPORT_SYMBOL_GPL(kvm_set_cr8);
555
556 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
557 {
558 if (irqchip_in_kernel(vcpu->kvm))
559 return kvm_lapic_get_cr8(vcpu);
560 else
561 return vcpu->arch.cr8;
562 }
563 EXPORT_SYMBOL_GPL(kvm_get_cr8);
564
565 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
566 {
567 switch (dr) {
568 case 0 ... 3:
569 vcpu->arch.db[dr] = val;
570 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
571 vcpu->arch.eff_db[dr] = val;
572 break;
573 case 4:
574 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
575 kvm_queue_exception(vcpu, UD_VECTOR);
576 return 1;
577 }
578 /* fall through */
579 case 6:
580 if (val & 0xffffffff00000000ULL) {
581 kvm_inject_gp(vcpu, 0);
582 return 1;
583 }
584 vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
585 break;
586 case 5:
587 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
588 kvm_queue_exception(vcpu, UD_VECTOR);
589 return 1;
590 }
591 /* fall through */
592 default: /* 7 */
593 if (val & 0xffffffff00000000ULL) {
594 kvm_inject_gp(vcpu, 0);
595 return 1;
596 }
597 vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
598 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
599 kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7);
600 vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK);
601 }
602 break;
603 }
604
605 return 0;
606 }
607 EXPORT_SYMBOL_GPL(kvm_set_dr);
608
609 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
610 {
611 switch (dr) {
612 case 0 ... 3:
613 *val = vcpu->arch.db[dr];
614 break;
615 case 4:
616 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
617 kvm_queue_exception(vcpu, UD_VECTOR);
618 return 1;
619 }
620 /* fall through */
621 case 6:
622 *val = vcpu->arch.dr6;
623 break;
624 case 5:
625 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE)) {
626 kvm_queue_exception(vcpu, UD_VECTOR);
627 return 1;
628 }
629 /* fall through */
630 default: /* 7 */
631 *val = vcpu->arch.dr7;
632 break;
633 }
634
635 return 0;
636 }
637 EXPORT_SYMBOL_GPL(kvm_get_dr);
638
639 static inline u32 bit(int bitno)
640 {
641 return 1 << (bitno & 31);
642 }
643
644 /*
645 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
646 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
647 *
648 * This list is modified at module load time to reflect the
649 * capabilities of the host cpu. This capabilities test skips MSRs that are
650 * kvm-specific. Those are put in the beginning of the list.
651 */
652
653 #define KVM_SAVE_MSRS_BEGIN 5
654 static u32 msrs_to_save[] = {
655 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
656 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
657 HV_X64_MSR_APIC_ASSIST_PAGE,
658 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
659 MSR_K6_STAR,
660 #ifdef CONFIG_X86_64
661 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
662 #endif
663 MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
664 };
665
666 static unsigned num_msrs_to_save;
667
668 static u32 emulated_msrs[] = {
669 MSR_IA32_MISC_ENABLE,
670 };
671
672 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
673 {
674 if (efer & efer_reserved_bits) {
675 kvm_inject_gp(vcpu, 0);
676 return;
677 }
678
679 if (is_paging(vcpu)
680 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME)) {
681 kvm_inject_gp(vcpu, 0);
682 return;
683 }
684
685 if (efer & EFER_FFXSR) {
686 struct kvm_cpuid_entry2 *feat;
687
688 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
689 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) {
690 kvm_inject_gp(vcpu, 0);
691 return;
692 }
693 }
694
695 if (efer & EFER_SVME) {
696 struct kvm_cpuid_entry2 *feat;
697
698 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
699 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) {
700 kvm_inject_gp(vcpu, 0);
701 return;
702 }
703 }
704
705 kvm_x86_ops->set_efer(vcpu, efer);
706
707 efer &= ~EFER_LMA;
708 efer |= vcpu->arch.efer & EFER_LMA;
709
710 vcpu->arch.efer = efer;
711
712 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
713 kvm_mmu_reset_context(vcpu);
714 }
715
716 void kvm_enable_efer_bits(u64 mask)
717 {
718 efer_reserved_bits &= ~mask;
719 }
720 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
721
722
723 /*
724 * Writes msr value into into the appropriate "register".
725 * Returns 0 on success, non-0 otherwise.
726 * Assumes vcpu_load() was already called.
727 */
728 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
729 {
730 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
731 }
732
733 /*
734 * Adapt set_msr() to msr_io()'s calling convention
735 */
736 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
737 {
738 return kvm_set_msr(vcpu, index, *data);
739 }
740
741 static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
742 {
743 static int version;
744 struct pvclock_wall_clock wc;
745 struct timespec boot;
746
747 if (!wall_clock)
748 return;
749
750 version++;
751
752 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
753
754 /*
755 * The guest calculates current wall clock time by adding
756 * system time (updated by kvm_write_guest_time below) to the
757 * wall clock specified here. guest system time equals host
758 * system time for us, thus we must fill in host boot time here.
759 */
760 getboottime(&boot);
761
762 wc.sec = boot.tv_sec;
763 wc.nsec = boot.tv_nsec;
764 wc.version = version;
765
766 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
767
768 version++;
769 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
770 }
771
772 static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
773 {
774 uint32_t quotient, remainder;
775
776 /* Don't try to replace with do_div(), this one calculates
777 * "(dividend << 32) / divisor" */
778 __asm__ ( "divl %4"
779 : "=a" (quotient), "=d" (remainder)
780 : "0" (0), "1" (dividend), "r" (divisor) );
781 return quotient;
782 }
783
784 static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock)
785 {
786 uint64_t nsecs = 1000000000LL;
787 int32_t shift = 0;
788 uint64_t tps64;
789 uint32_t tps32;
790
791 tps64 = tsc_khz * 1000LL;
792 while (tps64 > nsecs*2) {
793 tps64 >>= 1;
794 shift--;
795 }
796
797 tps32 = (uint32_t)tps64;
798 while (tps32 <= (uint32_t)nsecs) {
799 tps32 <<= 1;
800 shift++;
801 }
802
803 hv_clock->tsc_shift = shift;
804 hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32);
805
806 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
807 __func__, tsc_khz, hv_clock->tsc_shift,
808 hv_clock->tsc_to_system_mul);
809 }
810
811 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
812
813 static void kvm_write_guest_time(struct kvm_vcpu *v)
814 {
815 struct timespec ts;
816 unsigned long flags;
817 struct kvm_vcpu_arch *vcpu = &v->arch;
818 void *shared_kaddr;
819 unsigned long this_tsc_khz;
820
821 if ((!vcpu->time_page))
822 return;
823
824 this_tsc_khz = get_cpu_var(cpu_tsc_khz);
825 if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) {
826 kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock);
827 vcpu->hv_clock_tsc_khz = this_tsc_khz;
828 }
829 put_cpu_var(cpu_tsc_khz);
830
831 /* Keep irq disabled to prevent changes to the clock */
832 local_irq_save(flags);
833 kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp);
834 ktime_get_ts(&ts);
835 monotonic_to_bootbased(&ts);
836 local_irq_restore(flags);
837
838 /* With all the info we got, fill in the values */
839
840 vcpu->hv_clock.system_time = ts.tv_nsec +
841 (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset;
842
843 /*
844 * The interface expects us to write an even number signaling that the
845 * update is finished. Since the guest won't see the intermediate
846 * state, we just increase by 2 at the end.
847 */
848 vcpu->hv_clock.version += 2;
849
850 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
851
852 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
853 sizeof(vcpu->hv_clock));
854
855 kunmap_atomic(shared_kaddr, KM_USER0);
856
857 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
858 }
859
860 static int kvm_request_guest_time_update(struct kvm_vcpu *v)
861 {
862 struct kvm_vcpu_arch *vcpu = &v->arch;
863
864 if (!vcpu->time_page)
865 return 0;
866 set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests);
867 return 1;
868 }
869
870 static bool msr_mtrr_valid(unsigned msr)
871 {
872 switch (msr) {
873 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
874 case MSR_MTRRfix64K_00000:
875 case MSR_MTRRfix16K_80000:
876 case MSR_MTRRfix16K_A0000:
877 case MSR_MTRRfix4K_C0000:
878 case MSR_MTRRfix4K_C8000:
879 case MSR_MTRRfix4K_D0000:
880 case MSR_MTRRfix4K_D8000:
881 case MSR_MTRRfix4K_E0000:
882 case MSR_MTRRfix4K_E8000:
883 case MSR_MTRRfix4K_F0000:
884 case MSR_MTRRfix4K_F8000:
885 case MSR_MTRRdefType:
886 case MSR_IA32_CR_PAT:
887 return true;
888 case 0x2f8:
889 return true;
890 }
891 return false;
892 }
893
894 static bool valid_pat_type(unsigned t)
895 {
896 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
897 }
898
899 static bool valid_mtrr_type(unsigned t)
900 {
901 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
902 }
903
904 static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
905 {
906 int i;
907
908 if (!msr_mtrr_valid(msr))
909 return false;
910
911 if (msr == MSR_IA32_CR_PAT) {
912 for (i = 0; i < 8; i++)
913 if (!valid_pat_type((data >> (i * 8)) & 0xff))
914 return false;
915 return true;
916 } else if (msr == MSR_MTRRdefType) {
917 if (data & ~0xcff)
918 return false;
919 return valid_mtrr_type(data & 0xff);
920 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
921 for (i = 0; i < 8 ; i++)
922 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
923 return false;
924 return true;
925 }
926
927 /* variable MTRRs */
928 return valid_mtrr_type(data & 0xff);
929 }
930
931 static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
932 {
933 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
934
935 if (!mtrr_valid(vcpu, msr, data))
936 return 1;
937
938 if (msr == MSR_MTRRdefType) {
939 vcpu->arch.mtrr_state.def_type = data;
940 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
941 } else if (msr == MSR_MTRRfix64K_00000)
942 p[0] = data;
943 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
944 p[1 + msr - MSR_MTRRfix16K_80000] = data;
945 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
946 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
947 else if (msr == MSR_IA32_CR_PAT)
948 vcpu->arch.pat = data;
949 else { /* Variable MTRRs */
950 int idx, is_mtrr_mask;
951 u64 *pt;
952
953 idx = (msr - 0x200) / 2;
954 is_mtrr_mask = msr - 0x200 - 2 * idx;
955 if (!is_mtrr_mask)
956 pt =
957 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
958 else
959 pt =
960 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
961 *pt = data;
962 }
963
964 kvm_mmu_reset_context(vcpu);
965 return 0;
966 }
967
968 static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
969 {
970 u64 mcg_cap = vcpu->arch.mcg_cap;
971 unsigned bank_num = mcg_cap & 0xff;
972
973 switch (msr) {
974 case MSR_IA32_MCG_STATUS:
975 vcpu->arch.mcg_status = data;
976 break;
977 case MSR_IA32_MCG_CTL:
978 if (!(mcg_cap & MCG_CTL_P))
979 return 1;
980 if (data != 0 && data != ~(u64)0)
981 return -1;
982 vcpu->arch.mcg_ctl = data;
983 break;
984 default:
985 if (msr >= MSR_IA32_MC0_CTL &&
986 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
987 u32 offset = msr - MSR_IA32_MC0_CTL;
988 /* only 0 or all 1s can be written to IA32_MCi_CTL
989 * some Linux kernels though clear bit 10 in bank 4 to
990 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
991 * this to avoid an uncatched #GP in the guest
992 */
993 if ((offset & 0x3) == 0 &&
994 data != 0 && (data | (1 << 10)) != ~(u64)0)
995 return -1;
996 vcpu->arch.mce_banks[offset] = data;
997 break;
998 }
999 return 1;
1000 }
1001 return 0;
1002 }
1003
1004 static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
1005 {
1006 struct kvm *kvm = vcpu->kvm;
1007 int lm = is_long_mode(vcpu);
1008 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
1009 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
1010 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
1011 : kvm->arch.xen_hvm_config.blob_size_32;
1012 u32 page_num = data & ~PAGE_MASK;
1013 u64 page_addr = data & PAGE_MASK;
1014 u8 *page;
1015 int r;
1016
1017 r = -E2BIG;
1018 if (page_num >= blob_size)
1019 goto out;
1020 r = -ENOMEM;
1021 page = kzalloc(PAGE_SIZE, GFP_KERNEL);
1022 if (!page)
1023 goto out;
1024 r = -EFAULT;
1025 if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE))
1026 goto out_free;
1027 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
1028 goto out_free;
1029 r = 0;
1030 out_free:
1031 kfree(page);
1032 out:
1033 return r;
1034 }
1035
1036 static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
1037 {
1038 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
1039 }
1040
1041 static bool kvm_hv_msr_partition_wide(u32 msr)
1042 {
1043 bool r = false;
1044 switch (msr) {
1045 case HV_X64_MSR_GUEST_OS_ID:
1046 case HV_X64_MSR_HYPERCALL:
1047 r = true;
1048 break;
1049 }
1050
1051 return r;
1052 }
1053
1054 static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1055 {
1056 struct kvm *kvm = vcpu->kvm;
1057
1058 switch (msr) {
1059 case HV_X64_MSR_GUEST_OS_ID:
1060 kvm->arch.hv_guest_os_id = data;
1061 /* setting guest os id to zero disables hypercall page */
1062 if (!kvm->arch.hv_guest_os_id)
1063 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
1064 break;
1065 case HV_X64_MSR_HYPERCALL: {
1066 u64 gfn;
1067 unsigned long addr;
1068 u8 instructions[4];
1069
1070 /* if guest os id is not set hypercall should remain disabled */
1071 if (!kvm->arch.hv_guest_os_id)
1072 break;
1073 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1074 kvm->arch.hv_hypercall = data;
1075 break;
1076 }
1077 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1078 addr = gfn_to_hva(kvm, gfn);
1079 if (kvm_is_error_hva(addr))
1080 return 1;
1081 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1082 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
1083 if (copy_to_user((void __user *)addr, instructions, 4))
1084 return 1;
1085 kvm->arch.hv_hypercall = data;
1086 break;
1087 }
1088 default:
1089 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1090 "data 0x%llx\n", msr, data);
1091 return 1;
1092 }
1093 return 0;
1094 }
1095
1096 static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1097 {
1098 switch (msr) {
1099 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1100 unsigned long addr;
1101
1102 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1103 vcpu->arch.hv_vapic = data;
1104 break;
1105 }
1106 addr = gfn_to_hva(vcpu->kvm, data >>
1107 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1108 if (kvm_is_error_hva(addr))
1109 return 1;
1110 if (clear_user((void __user *)addr, PAGE_SIZE))
1111 return 1;
1112 vcpu->arch.hv_vapic = data;
1113 break;
1114 }
1115 case HV_X64_MSR_EOI:
1116 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1117 case HV_X64_MSR_ICR:
1118 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1119 case HV_X64_MSR_TPR:
1120 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1121 default:
1122 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1123 "data 0x%llx\n", msr, data);
1124 return 1;
1125 }
1126
1127 return 0;
1128 }
1129
1130 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1131 {
1132 switch (msr) {
1133 case MSR_EFER:
1134 set_efer(vcpu, data);
1135 break;
1136 case MSR_K7_HWCR:
1137 data &= ~(u64)0x40; /* ignore flush filter disable */
1138 data &= ~(u64)0x100; /* ignore ignne emulation enable */
1139 if (data != 0) {
1140 pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1141 data);
1142 return 1;
1143 }
1144 break;
1145 case MSR_FAM10H_MMIO_CONF_BASE:
1146 if (data != 0) {
1147 pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1148 "0x%llx\n", data);
1149 return 1;
1150 }
1151 break;
1152 case MSR_AMD64_NB_CFG:
1153 break;
1154 case MSR_IA32_DEBUGCTLMSR:
1155 if (!data) {
1156 /* We support the non-activated case already */
1157 break;
1158 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1159 /* Values other than LBR and BTF are vendor-specific,
1160 thus reserved and should throw a #GP */
1161 return 1;
1162 }
1163 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1164 __func__, data);
1165 break;
1166 case MSR_IA32_UCODE_REV:
1167 case MSR_IA32_UCODE_WRITE:
1168 case MSR_VM_HSAVE_PA:
1169 case MSR_AMD64_PATCH_LOADER:
1170 break;
1171 case 0x200 ... 0x2ff:
1172 return set_msr_mtrr(vcpu, msr, data);
1173 case MSR_IA32_APICBASE:
1174 kvm_set_apic_base(vcpu, data);
1175 break;
1176 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1177 return kvm_x2apic_msr_write(vcpu, msr, data);
1178 case MSR_IA32_MISC_ENABLE:
1179 vcpu->arch.ia32_misc_enable_msr = data;
1180 break;
1181 case MSR_KVM_WALL_CLOCK:
1182 vcpu->kvm->arch.wall_clock = data;
1183 kvm_write_wall_clock(vcpu->kvm, data);
1184 break;
1185 case MSR_KVM_SYSTEM_TIME: {
1186 if (vcpu->arch.time_page) {
1187 kvm_release_page_dirty(vcpu->arch.time_page);
1188 vcpu->arch.time_page = NULL;
1189 }
1190
1191 vcpu->arch.time = data;
1192
1193 /* we verify if the enable bit is set... */
1194 if (!(data & 1))
1195 break;
1196
1197 /* ...but clean it before doing the actual write */
1198 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1199
1200 vcpu->arch.time_page =
1201 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
1202
1203 if (is_error_page(vcpu->arch.time_page)) {
1204 kvm_release_page_clean(vcpu->arch.time_page);
1205 vcpu->arch.time_page = NULL;
1206 }
1207
1208 kvm_request_guest_time_update(vcpu);
1209 break;
1210 }
1211 case MSR_IA32_MCG_CTL:
1212 case MSR_IA32_MCG_STATUS:
1213 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1214 return set_msr_mce(vcpu, msr, data);
1215
1216 /* Performance counters are not protected by a CPUID bit,
1217 * so we should check all of them in the generic path for the sake of
1218 * cross vendor migration.
1219 * Writing a zero into the event select MSRs disables them,
1220 * which we perfectly emulate ;-). Any other value should be at least
1221 * reported, some guests depend on them.
1222 */
1223 case MSR_P6_EVNTSEL0:
1224 case MSR_P6_EVNTSEL1:
1225 case MSR_K7_EVNTSEL0:
1226 case MSR_K7_EVNTSEL1:
1227 case MSR_K7_EVNTSEL2:
1228 case MSR_K7_EVNTSEL3:
1229 if (data != 0)
1230 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1231 "0x%x data 0x%llx\n", msr, data);
1232 break;
1233 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1234 * so we ignore writes to make it happy.
1235 */
1236 case MSR_P6_PERFCTR0:
1237 case MSR_P6_PERFCTR1:
1238 case MSR_K7_PERFCTR0:
1239 case MSR_K7_PERFCTR1:
1240 case MSR_K7_PERFCTR2:
1241 case MSR_K7_PERFCTR3:
1242 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1243 "0x%x data 0x%llx\n", msr, data);
1244 break;
1245 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1246 if (kvm_hv_msr_partition_wide(msr)) {
1247 int r;
1248 mutex_lock(&vcpu->kvm->lock);
1249 r = set_msr_hyperv_pw(vcpu, msr, data);
1250 mutex_unlock(&vcpu->kvm->lock);
1251 return r;
1252 } else
1253 return set_msr_hyperv(vcpu, msr, data);
1254 break;
1255 default:
1256 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1257 return xen_hvm_config(vcpu, data);
1258 if (!ignore_msrs) {
1259 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1260 msr, data);
1261 return 1;
1262 } else {
1263 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1264 msr, data);
1265 break;
1266 }
1267 }
1268 return 0;
1269 }
1270 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1271
1272
1273 /*
1274 * Reads an msr value (of 'msr_index') into 'pdata'.
1275 * Returns 0 on success, non-0 otherwise.
1276 * Assumes vcpu_load() was already called.
1277 */
1278 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1279 {
1280 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1281 }
1282
1283 static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1284 {
1285 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1286
1287 if (!msr_mtrr_valid(msr))
1288 return 1;
1289
1290 if (msr == MSR_MTRRdefType)
1291 *pdata = vcpu->arch.mtrr_state.def_type +
1292 (vcpu->arch.mtrr_state.enabled << 10);
1293 else if (msr == MSR_MTRRfix64K_00000)
1294 *pdata = p[0];
1295 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1296 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1297 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1298 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1299 else if (msr == MSR_IA32_CR_PAT)
1300 *pdata = vcpu->arch.pat;
1301 else { /* Variable MTRRs */
1302 int idx, is_mtrr_mask;
1303 u64 *pt;
1304
1305 idx = (msr - 0x200) / 2;
1306 is_mtrr_mask = msr - 0x200 - 2 * idx;
1307 if (!is_mtrr_mask)
1308 pt =
1309 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1310 else
1311 pt =
1312 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1313 *pdata = *pt;
1314 }
1315
1316 return 0;
1317 }
1318
1319 static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1320 {
1321 u64 data;
1322 u64 mcg_cap = vcpu->arch.mcg_cap;
1323 unsigned bank_num = mcg_cap & 0xff;
1324
1325 switch (msr) {
1326 case MSR_IA32_P5_MC_ADDR:
1327 case MSR_IA32_P5_MC_TYPE:
1328 data = 0;
1329 break;
1330 case MSR_IA32_MCG_CAP:
1331 data = vcpu->arch.mcg_cap;
1332 break;
1333 case MSR_IA32_MCG_CTL:
1334 if (!(mcg_cap & MCG_CTL_P))
1335 return 1;
1336 data = vcpu->arch.mcg_ctl;
1337 break;
1338 case MSR_IA32_MCG_STATUS:
1339 data = vcpu->arch.mcg_status;
1340 break;
1341 default:
1342 if (msr >= MSR_IA32_MC0_CTL &&
1343 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1344 u32 offset = msr - MSR_IA32_MC0_CTL;
1345 data = vcpu->arch.mce_banks[offset];
1346 break;
1347 }
1348 return 1;
1349 }
1350 *pdata = data;
1351 return 0;
1352 }
1353
1354 static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1355 {
1356 u64 data = 0;
1357 struct kvm *kvm = vcpu->kvm;
1358
1359 switch (msr) {
1360 case HV_X64_MSR_GUEST_OS_ID:
1361 data = kvm->arch.hv_guest_os_id;
1362 break;
1363 case HV_X64_MSR_HYPERCALL:
1364 data = kvm->arch.hv_hypercall;
1365 break;
1366 default:
1367 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1368 return 1;
1369 }
1370
1371 *pdata = data;
1372 return 0;
1373 }
1374
1375 static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1376 {
1377 u64 data = 0;
1378
1379 switch (msr) {
1380 case HV_X64_MSR_VP_INDEX: {
1381 int r;
1382 struct kvm_vcpu *v;
1383 kvm_for_each_vcpu(r, v, vcpu->kvm)
1384 if (v == vcpu)
1385 data = r;
1386 break;
1387 }
1388 case HV_X64_MSR_EOI:
1389 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1390 case HV_X64_MSR_ICR:
1391 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1392 case HV_X64_MSR_TPR:
1393 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
1394 default:
1395 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1396 return 1;
1397 }
1398 *pdata = data;
1399 return 0;
1400 }
1401
1402 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1403 {
1404 u64 data;
1405
1406 switch (msr) {
1407 case MSR_IA32_PLATFORM_ID:
1408 case MSR_IA32_UCODE_REV:
1409 case MSR_IA32_EBL_CR_POWERON:
1410 case MSR_IA32_DEBUGCTLMSR:
1411 case MSR_IA32_LASTBRANCHFROMIP:
1412 case MSR_IA32_LASTBRANCHTOIP:
1413 case MSR_IA32_LASTINTFROMIP:
1414 case MSR_IA32_LASTINTTOIP:
1415 case MSR_K8_SYSCFG:
1416 case MSR_K7_HWCR:
1417 case MSR_VM_HSAVE_PA:
1418 case MSR_P6_PERFCTR0:
1419 case MSR_P6_PERFCTR1:
1420 case MSR_P6_EVNTSEL0:
1421 case MSR_P6_EVNTSEL1:
1422 case MSR_K7_EVNTSEL0:
1423 case MSR_K7_PERFCTR0:
1424 case MSR_K8_INT_PENDING_MSG:
1425 case MSR_AMD64_NB_CFG:
1426 case MSR_FAM10H_MMIO_CONF_BASE:
1427 data = 0;
1428 break;
1429 case MSR_MTRRcap:
1430 data = 0x500 | KVM_NR_VAR_MTRR;
1431 break;
1432 case 0x200 ... 0x2ff:
1433 return get_msr_mtrr(vcpu, msr, pdata);
1434 case 0xcd: /* fsb frequency */
1435 data = 3;
1436 break;
1437 case MSR_IA32_APICBASE:
1438 data = kvm_get_apic_base(vcpu);
1439 break;
1440 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1441 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1442 break;
1443 case MSR_IA32_MISC_ENABLE:
1444 data = vcpu->arch.ia32_misc_enable_msr;
1445 break;
1446 case MSR_IA32_PERF_STATUS:
1447 /* TSC increment by tick */
1448 data = 1000ULL;
1449 /* CPU multiplier */
1450 data |= (((uint64_t)4ULL) << 40);
1451 break;
1452 case MSR_EFER:
1453 data = vcpu->arch.efer;
1454 break;
1455 case MSR_KVM_WALL_CLOCK:
1456 data = vcpu->kvm->arch.wall_clock;
1457 break;
1458 case MSR_KVM_SYSTEM_TIME:
1459 data = vcpu->arch.time;
1460 break;
1461 case MSR_IA32_P5_MC_ADDR:
1462 case MSR_IA32_P5_MC_TYPE:
1463 case MSR_IA32_MCG_CAP:
1464 case MSR_IA32_MCG_CTL:
1465 case MSR_IA32_MCG_STATUS:
1466 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1467 return get_msr_mce(vcpu, msr, pdata);
1468 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1469 if (kvm_hv_msr_partition_wide(msr)) {
1470 int r;
1471 mutex_lock(&vcpu->kvm->lock);
1472 r = get_msr_hyperv_pw(vcpu, msr, pdata);
1473 mutex_unlock(&vcpu->kvm->lock);
1474 return r;
1475 } else
1476 return get_msr_hyperv(vcpu, msr, pdata);
1477 break;
1478 default:
1479 if (!ignore_msrs) {
1480 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
1481 return 1;
1482 } else {
1483 pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
1484 data = 0;
1485 }
1486 break;
1487 }
1488 *pdata = data;
1489 return 0;
1490 }
1491 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1492
1493 /*
1494 * Read or write a bunch of msrs. All parameters are kernel addresses.
1495 *
1496 * @return number of msrs set successfully.
1497 */
1498 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
1499 struct kvm_msr_entry *entries,
1500 int (*do_msr)(struct kvm_vcpu *vcpu,
1501 unsigned index, u64 *data))
1502 {
1503 int i, idx;
1504
1505 vcpu_load(vcpu);
1506
1507 idx = srcu_read_lock(&vcpu->kvm->srcu);
1508 for (i = 0; i < msrs->nmsrs; ++i)
1509 if (do_msr(vcpu, entries[i].index, &entries[i].data))
1510 break;
1511 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1512
1513 vcpu_put(vcpu);
1514
1515 return i;
1516 }
1517
1518 /*
1519 * Read or write a bunch of msrs. Parameters are user addresses.
1520 *
1521 * @return number of msrs set successfully.
1522 */
1523 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
1524 int (*do_msr)(struct kvm_vcpu *vcpu,
1525 unsigned index, u64 *data),
1526 int writeback)
1527 {
1528 struct kvm_msrs msrs;
1529 struct kvm_msr_entry *entries;
1530 int r, n;
1531 unsigned size;
1532
1533 r = -EFAULT;
1534 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
1535 goto out;
1536
1537 r = -E2BIG;
1538 if (msrs.nmsrs >= MAX_IO_MSRS)
1539 goto out;
1540
1541 r = -ENOMEM;
1542 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
1543 entries = vmalloc(size);
1544 if (!entries)
1545 goto out;
1546
1547 r = -EFAULT;
1548 if (copy_from_user(entries, user_msrs->entries, size))
1549 goto out_free;
1550
1551 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
1552 if (r < 0)
1553 goto out_free;
1554
1555 r = -EFAULT;
1556 if (writeback && copy_to_user(user_msrs->entries, entries, size))
1557 goto out_free;
1558
1559 r = n;
1560
1561 out_free:
1562 vfree(entries);
1563 out:
1564 return r;
1565 }
1566
1567 int kvm_dev_ioctl_check_extension(long ext)
1568 {
1569 int r;
1570
1571 switch (ext) {
1572 case KVM_CAP_IRQCHIP:
1573 case KVM_CAP_HLT:
1574 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
1575 case KVM_CAP_SET_TSS_ADDR:
1576 case KVM_CAP_EXT_CPUID:
1577 case KVM_CAP_CLOCKSOURCE:
1578 case KVM_CAP_PIT:
1579 case KVM_CAP_NOP_IO_DELAY:
1580 case KVM_CAP_MP_STATE:
1581 case KVM_CAP_SYNC_MMU:
1582 case KVM_CAP_REINJECT_CONTROL:
1583 case KVM_CAP_IRQ_INJECT_STATUS:
1584 case KVM_CAP_ASSIGN_DEV_IRQ:
1585 case KVM_CAP_IRQFD:
1586 case KVM_CAP_IOEVENTFD:
1587 case KVM_CAP_PIT2:
1588 case KVM_CAP_PIT_STATE2:
1589 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
1590 case KVM_CAP_XEN_HVM:
1591 case KVM_CAP_ADJUST_CLOCK:
1592 case KVM_CAP_VCPU_EVENTS:
1593 case KVM_CAP_HYPERV:
1594 case KVM_CAP_HYPERV_VAPIC:
1595 case KVM_CAP_HYPERV_SPIN:
1596 case KVM_CAP_PCI_SEGMENT:
1597 case KVM_CAP_DEBUGREGS:
1598 case KVM_CAP_X86_ROBUST_SINGLESTEP:
1599 r = 1;
1600 break;
1601 case KVM_CAP_COALESCED_MMIO:
1602 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
1603 break;
1604 case KVM_CAP_VAPIC:
1605 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
1606 break;
1607 case KVM_CAP_NR_VCPUS:
1608 r = KVM_MAX_VCPUS;
1609 break;
1610 case KVM_CAP_NR_MEMSLOTS:
1611 r = KVM_MEMORY_SLOTS;
1612 break;
1613 case KVM_CAP_PV_MMU: /* obsolete */
1614 r = 0;
1615 break;
1616 case KVM_CAP_IOMMU:
1617 r = iommu_found();
1618 break;
1619 case KVM_CAP_MCE:
1620 r = KVM_MAX_MCE_BANKS;
1621 break;
1622 default:
1623 r = 0;
1624 break;
1625 }
1626 return r;
1627
1628 }
1629
1630 long kvm_arch_dev_ioctl(struct file *filp,
1631 unsigned int ioctl, unsigned long arg)
1632 {
1633 void __user *argp = (void __user *)arg;
1634 long r;
1635
1636 switch (ioctl) {
1637 case KVM_GET_MSR_INDEX_LIST: {
1638 struct kvm_msr_list __user *user_msr_list = argp;
1639 struct kvm_msr_list msr_list;
1640 unsigned n;
1641
1642 r = -EFAULT;
1643 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
1644 goto out;
1645 n = msr_list.nmsrs;
1646 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
1647 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
1648 goto out;
1649 r = -E2BIG;
1650 if (n < msr_list.nmsrs)
1651 goto out;
1652 r = -EFAULT;
1653 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
1654 num_msrs_to_save * sizeof(u32)))
1655 goto out;
1656 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
1657 &emulated_msrs,
1658 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
1659 goto out;
1660 r = 0;
1661 break;
1662 }
1663 case KVM_GET_SUPPORTED_CPUID: {
1664 struct kvm_cpuid2 __user *cpuid_arg = argp;
1665 struct kvm_cpuid2 cpuid;
1666
1667 r = -EFAULT;
1668 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1669 goto out;
1670 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
1671 cpuid_arg->entries);
1672 if (r)
1673 goto out;
1674
1675 r = -EFAULT;
1676 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1677 goto out;
1678 r = 0;
1679 break;
1680 }
1681 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
1682 u64 mce_cap;
1683
1684 mce_cap = KVM_MCE_CAP_SUPPORTED;
1685 r = -EFAULT;
1686 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
1687 goto out;
1688 r = 0;
1689 break;
1690 }
1691 default:
1692 r = -EINVAL;
1693 }
1694 out:
1695 return r;
1696 }
1697
1698 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1699 {
1700 kvm_x86_ops->vcpu_load(vcpu, cpu);
1701 if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) {
1702 unsigned long khz = cpufreq_quick_get(cpu);
1703 if (!khz)
1704 khz = tsc_khz;
1705 per_cpu(cpu_tsc_khz, cpu) = khz;
1706 }
1707 kvm_request_guest_time_update(vcpu);
1708 }
1709
1710 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1711 {
1712 kvm_put_guest_fpu(vcpu);
1713 kvm_x86_ops->vcpu_put(vcpu);
1714 }
1715
1716 static int is_efer_nx(void)
1717 {
1718 unsigned long long efer = 0;
1719
1720 rdmsrl_safe(MSR_EFER, &efer);
1721 return efer & EFER_NX;
1722 }
1723
1724 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
1725 {
1726 int i;
1727 struct kvm_cpuid_entry2 *e, *entry;
1728
1729 entry = NULL;
1730 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
1731 e = &vcpu->arch.cpuid_entries[i];
1732 if (e->function == 0x80000001) {
1733 entry = e;
1734 break;
1735 }
1736 }
1737 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
1738 entry->edx &= ~(1 << 20);
1739 printk(KERN_INFO "kvm: guest NX capability removed\n");
1740 }
1741 }
1742
1743 /* when an old userspace process fills a new kernel module */
1744 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
1745 struct kvm_cpuid *cpuid,
1746 struct kvm_cpuid_entry __user *entries)
1747 {
1748 int r, i;
1749 struct kvm_cpuid_entry *cpuid_entries;
1750
1751 r = -E2BIG;
1752 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1753 goto out;
1754 r = -ENOMEM;
1755 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
1756 if (!cpuid_entries)
1757 goto out;
1758 r = -EFAULT;
1759 if (copy_from_user(cpuid_entries, entries,
1760 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
1761 goto out_free;
1762 for (i = 0; i < cpuid->nent; i++) {
1763 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
1764 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
1765 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
1766 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
1767 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
1768 vcpu->arch.cpuid_entries[i].index = 0;
1769 vcpu->arch.cpuid_entries[i].flags = 0;
1770 vcpu->arch.cpuid_entries[i].padding[0] = 0;
1771 vcpu->arch.cpuid_entries[i].padding[1] = 0;
1772 vcpu->arch.cpuid_entries[i].padding[2] = 0;
1773 }
1774 vcpu->arch.cpuid_nent = cpuid->nent;
1775 cpuid_fix_nx_cap(vcpu);
1776 r = 0;
1777 kvm_apic_set_version(vcpu);
1778 kvm_x86_ops->cpuid_update(vcpu);
1779
1780 out_free:
1781 vfree(cpuid_entries);
1782 out:
1783 return r;
1784 }
1785
1786 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
1787 struct kvm_cpuid2 *cpuid,
1788 struct kvm_cpuid_entry2 __user *entries)
1789 {
1790 int r;
1791
1792 r = -E2BIG;
1793 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1794 goto out;
1795 r = -EFAULT;
1796 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
1797 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
1798 goto out;
1799 vcpu->arch.cpuid_nent = cpuid->nent;
1800 kvm_apic_set_version(vcpu);
1801 kvm_x86_ops->cpuid_update(vcpu);
1802 return 0;
1803
1804 out:
1805 return r;
1806 }
1807
1808 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
1809 struct kvm_cpuid2 *cpuid,
1810 struct kvm_cpuid_entry2 __user *entries)
1811 {
1812 int r;
1813
1814 r = -E2BIG;
1815 if (cpuid->nent < vcpu->arch.cpuid_nent)
1816 goto out;
1817 r = -EFAULT;
1818 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
1819 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
1820 goto out;
1821 return 0;
1822
1823 out:
1824 cpuid->nent = vcpu->arch.cpuid_nent;
1825 return r;
1826 }
1827
1828 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1829 u32 index)
1830 {
1831 entry->function = function;
1832 entry->index = index;
1833 cpuid_count(entry->function, entry->index,
1834 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
1835 entry->flags = 0;
1836 }
1837
1838 #define F(x) bit(X86_FEATURE_##x)
1839
1840 static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1841 u32 index, int *nent, int maxnent)
1842 {
1843 unsigned f_nx = is_efer_nx() ? F(NX) : 0;
1844 #ifdef CONFIG_X86_64
1845 unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL)
1846 ? F(GBPAGES) : 0;
1847 unsigned f_lm = F(LM);
1848 #else
1849 unsigned f_gbpages = 0;
1850 unsigned f_lm = 0;
1851 #endif
1852 unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
1853
1854 /* cpuid 1.edx */
1855 const u32 kvm_supported_word0_x86_features =
1856 F(FPU) | F(VME) | F(DE) | F(PSE) |
1857 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1858 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
1859 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1860 F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) |
1861 0 /* Reserved, DS, ACPI */ | F(MMX) |
1862 F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
1863 0 /* HTT, TM, Reserved, PBE */;
1864 /* cpuid 0x80000001.edx */
1865 const u32 kvm_supported_word1_x86_features =
1866 F(FPU) | F(VME) | F(DE) | F(PSE) |
1867 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1868 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) |
1869 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1870 F(PAT) | F(PSE36) | 0 /* Reserved */ |
1871 f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) |
1872 F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp |
1873 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW);
1874 /* cpuid 1.ecx */
1875 const u32 kvm_supported_word4_x86_features =
1876 F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ |
1877 0 /* DS-CPL, VMX, SMX, EST */ |
1878 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
1879 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ |
1880 0 /* Reserved, DCA */ | F(XMM4_1) |
1881 F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
1882 0 /* Reserved, XSAVE, OSXSAVE */;
1883 /* cpuid 0x80000001.ecx */
1884 const u32 kvm_supported_word6_x86_features =
1885 F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ |
1886 F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
1887 F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) |
1888 0 /* SKINIT */ | 0 /* WDT */;
1889
1890 /* all calls to cpuid_count() should be made on the same cpu */
1891 get_cpu();
1892 do_cpuid_1_ent(entry, function, index);
1893 ++*nent;
1894
1895 switch (function) {
1896 case 0:
1897 entry->eax = min(entry->eax, (u32)0xb);
1898 break;
1899 case 1:
1900 entry->edx &= kvm_supported_word0_x86_features;
1901 entry->ecx &= kvm_supported_word4_x86_features;
1902 /* we support x2apic emulation even if host does not support
1903 * it since we emulate x2apic in software */
1904 entry->ecx |= F(X2APIC);
1905 break;
1906 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1907 * may return different values. This forces us to get_cpu() before
1908 * issuing the first command, and also to emulate this annoying behavior
1909 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1910 case 2: {
1911 int t, times = entry->eax & 0xff;
1912
1913 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1914 entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
1915 for (t = 1; t < times && *nent < maxnent; ++t) {
1916 do_cpuid_1_ent(&entry[t], function, 0);
1917 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
1918 ++*nent;
1919 }
1920 break;
1921 }
1922 /* function 4 and 0xb have additional index. */
1923 case 4: {
1924 int i, cache_type;
1925
1926 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1927 /* read more entries until cache_type is zero */
1928 for (i = 1; *nent < maxnent; ++i) {
1929 cache_type = entry[i - 1].eax & 0x1f;
1930 if (!cache_type)
1931 break;
1932 do_cpuid_1_ent(&entry[i], function, i);
1933 entry[i].flags |=
1934 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1935 ++*nent;
1936 }
1937 break;
1938 }
1939 case 0xb: {
1940 int i, level_type;
1941
1942 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1943 /* read more entries until level_type is zero */
1944 for (i = 1; *nent < maxnent; ++i) {
1945 level_type = entry[i - 1].ecx & 0xff00;
1946 if (!level_type)
1947 break;
1948 do_cpuid_1_ent(&entry[i], function, i);
1949 entry[i].flags |=
1950 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
1951 ++*nent;
1952 }
1953 break;
1954 }
1955 case 0x80000000:
1956 entry->eax = min(entry->eax, 0x8000001a);
1957 break;
1958 case 0x80000001:
1959 entry->edx &= kvm_supported_word1_x86_features;
1960 entry->ecx &= kvm_supported_word6_x86_features;
1961 break;
1962 }
1963 put_cpu();
1964 }
1965
1966 #undef F
1967
1968 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
1969 struct kvm_cpuid_entry2 __user *entries)
1970 {
1971 struct kvm_cpuid_entry2 *cpuid_entries;
1972 int limit, nent = 0, r = -E2BIG;
1973 u32 func;
1974
1975 if (cpuid->nent < 1)
1976 goto out;
1977 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1978 cpuid->nent = KVM_MAX_CPUID_ENTRIES;
1979 r = -ENOMEM;
1980 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
1981 if (!cpuid_entries)
1982 goto out;
1983
1984 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
1985 limit = cpuid_entries[0].eax;
1986 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
1987 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1988 &nent, cpuid->nent);
1989 r = -E2BIG;
1990 if (nent >= cpuid->nent)
1991 goto out_free;
1992
1993 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
1994 limit = cpuid_entries[nent - 1].eax;
1995 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
1996 do_cpuid_ent(&cpuid_entries[nent], func, 0,
1997 &nent, cpuid->nent);
1998 r = -E2BIG;
1999 if (nent >= cpuid->nent)
2000 goto out_free;
2001
2002 r = -EFAULT;
2003 if (copy_to_user(entries, cpuid_entries,
2004 nent * sizeof(struct kvm_cpuid_entry2)))
2005 goto out_free;
2006 cpuid->nent = nent;
2007 r = 0;
2008
2009 out_free:
2010 vfree(cpuid_entries);
2011 out:
2012 return r;
2013 }
2014
2015 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2016 struct kvm_lapic_state *s)
2017 {
2018 vcpu_load(vcpu);
2019 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
2020 vcpu_put(vcpu);
2021
2022 return 0;
2023 }
2024
2025 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2026 struct kvm_lapic_state *s)
2027 {
2028 vcpu_load(vcpu);
2029 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
2030 kvm_apic_post_state_restore(vcpu);
2031 update_cr8_intercept(vcpu);
2032 vcpu_put(vcpu);
2033
2034 return 0;
2035 }
2036
2037 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2038 struct kvm_interrupt *irq)
2039 {
2040 if (irq->irq < 0 || irq->irq >= 256)
2041 return -EINVAL;
2042 if (irqchip_in_kernel(vcpu->kvm))
2043 return -ENXIO;
2044 vcpu_load(vcpu);
2045
2046 kvm_queue_interrupt(vcpu, irq->irq, false);
2047
2048 vcpu_put(vcpu);
2049
2050 return 0;
2051 }
2052
2053 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
2054 {
2055 vcpu_load(vcpu);
2056 kvm_inject_nmi(vcpu);
2057 vcpu_put(vcpu);
2058
2059 return 0;
2060 }
2061
2062 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
2063 struct kvm_tpr_access_ctl *tac)
2064 {
2065 if (tac->flags)
2066 return -EINVAL;
2067 vcpu->arch.tpr_access_reporting = !!tac->enabled;
2068 return 0;
2069 }
2070
2071 static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
2072 u64 mcg_cap)
2073 {
2074 int r;
2075 unsigned bank_num = mcg_cap & 0xff, bank;
2076
2077 r = -EINVAL;
2078 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
2079 goto out;
2080 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2081 goto out;
2082 r = 0;
2083 vcpu->arch.mcg_cap = mcg_cap;
2084 /* Init IA32_MCG_CTL to all 1s */
2085 if (mcg_cap & MCG_CTL_P)
2086 vcpu->arch.mcg_ctl = ~(u64)0;
2087 /* Init IA32_MCi_CTL to all 1s */
2088 for (bank = 0; bank < bank_num; bank++)
2089 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2090 out:
2091 return r;
2092 }
2093
2094 static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2095 struct kvm_x86_mce *mce)
2096 {
2097 u64 mcg_cap = vcpu->arch.mcg_cap;
2098 unsigned bank_num = mcg_cap & 0xff;
2099 u64 *banks = vcpu->arch.mce_banks;
2100
2101 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2102 return -EINVAL;
2103 /*
2104 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2105 * reporting is disabled
2106 */
2107 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2108 vcpu->arch.mcg_ctl != ~(u64)0)
2109 return 0;
2110 banks += 4 * mce->bank;
2111 /*
2112 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2113 * reporting is disabled for the bank
2114 */
2115 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2116 return 0;
2117 if (mce->status & MCI_STATUS_UC) {
2118 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
2119 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
2120 printk(KERN_DEBUG "kvm: set_mce: "
2121 "injects mce exception while "
2122 "previous one is in progress!\n");
2123 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
2124 return 0;
2125 }
2126 if (banks[1] & MCI_STATUS_VAL)
2127 mce->status |= MCI_STATUS_OVER;
2128 banks[2] = mce->addr;
2129 banks[3] = mce->misc;
2130 vcpu->arch.mcg_status = mce->mcg_status;
2131 banks[1] = mce->status;
2132 kvm_queue_exception(vcpu, MC_VECTOR);
2133 } else if (!(banks[1] & MCI_STATUS_VAL)
2134 || !(banks[1] & MCI_STATUS_UC)) {
2135 if (banks[1] & MCI_STATUS_VAL)
2136 mce->status |= MCI_STATUS_OVER;
2137 banks[2] = mce->addr;
2138 banks[3] = mce->misc;
2139 banks[1] = mce->status;
2140 } else
2141 banks[1] |= MCI_STATUS_OVER;
2142 return 0;
2143 }
2144
2145 static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2146 struct kvm_vcpu_events *events)
2147 {
2148 vcpu_load(vcpu);
2149
2150 events->exception.injected =
2151 vcpu->arch.exception.pending &&
2152 !kvm_exception_is_soft(vcpu->arch.exception.nr);
2153 events->exception.nr = vcpu->arch.exception.nr;
2154 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
2155 events->exception.error_code = vcpu->arch.exception.error_code;
2156
2157 events->interrupt.injected =
2158 vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
2159 events->interrupt.nr = vcpu->arch.interrupt.nr;
2160 events->interrupt.soft = 0;
2161 events->interrupt.shadow =
2162 kvm_x86_ops->get_interrupt_shadow(vcpu,
2163 KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
2164
2165 events->nmi.injected = vcpu->arch.nmi_injected;
2166 events->nmi.pending = vcpu->arch.nmi_pending;
2167 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
2168
2169 events->sipi_vector = vcpu->arch.sipi_vector;
2170
2171 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
2172 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2173 | KVM_VCPUEVENT_VALID_SHADOW);
2174
2175 vcpu_put(vcpu);
2176 }
2177
2178 static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2179 struct kvm_vcpu_events *events)
2180 {
2181 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
2182 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2183 | KVM_VCPUEVENT_VALID_SHADOW))
2184 return -EINVAL;
2185
2186 vcpu_load(vcpu);
2187
2188 vcpu->arch.exception.pending = events->exception.injected;
2189 vcpu->arch.exception.nr = events->exception.nr;
2190 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2191 vcpu->arch.exception.error_code = events->exception.error_code;
2192
2193 vcpu->arch.interrupt.pending = events->interrupt.injected;
2194 vcpu->arch.interrupt.nr = events->interrupt.nr;
2195 vcpu->arch.interrupt.soft = events->interrupt.soft;
2196 if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm))
2197 kvm_pic_clear_isr_ack(vcpu->kvm);
2198 if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
2199 kvm_x86_ops->set_interrupt_shadow(vcpu,
2200 events->interrupt.shadow);
2201
2202 vcpu->arch.nmi_injected = events->nmi.injected;
2203 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2204 vcpu->arch.nmi_pending = events->nmi.pending;
2205 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2206
2207 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2208 vcpu->arch.sipi_vector = events->sipi_vector;
2209
2210 vcpu_put(vcpu);
2211
2212 return 0;
2213 }
2214
2215 static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
2216 struct kvm_debugregs *dbgregs)
2217 {
2218 vcpu_load(vcpu);
2219
2220 memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
2221 dbgregs->dr6 = vcpu->arch.dr6;
2222 dbgregs->dr7 = vcpu->arch.dr7;
2223 dbgregs->flags = 0;
2224
2225 vcpu_put(vcpu);
2226 }
2227
2228 static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
2229 struct kvm_debugregs *dbgregs)
2230 {
2231 if (dbgregs->flags)
2232 return -EINVAL;
2233
2234 vcpu_load(vcpu);
2235
2236 memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
2237 vcpu->arch.dr6 = dbgregs->dr6;
2238 vcpu->arch.dr7 = dbgregs->dr7;
2239
2240 vcpu_put(vcpu);
2241
2242 return 0;
2243 }
2244
2245 long kvm_arch_vcpu_ioctl(struct file *filp,
2246 unsigned int ioctl, unsigned long arg)
2247 {
2248 struct kvm_vcpu *vcpu = filp->private_data;
2249 void __user *argp = (void __user *)arg;
2250 int r;
2251 struct kvm_lapic_state *lapic = NULL;
2252
2253 switch (ioctl) {
2254 case KVM_GET_LAPIC: {
2255 r = -EINVAL;
2256 if (!vcpu->arch.apic)
2257 goto out;
2258 lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2259
2260 r = -ENOMEM;
2261 if (!lapic)
2262 goto out;
2263 r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic);
2264 if (r)
2265 goto out;
2266 r = -EFAULT;
2267 if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state)))
2268 goto out;
2269 r = 0;
2270 break;
2271 }
2272 case KVM_SET_LAPIC: {
2273 r = -EINVAL;
2274 if (!vcpu->arch.apic)
2275 goto out;
2276 lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2277 r = -ENOMEM;
2278 if (!lapic)
2279 goto out;
2280 r = -EFAULT;
2281 if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state)))
2282 goto out;
2283 r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic);
2284 if (r)
2285 goto out;
2286 r = 0;
2287 break;
2288 }
2289 case KVM_INTERRUPT: {
2290 struct kvm_interrupt irq;
2291
2292 r = -EFAULT;
2293 if (copy_from_user(&irq, argp, sizeof irq))
2294 goto out;
2295 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2296 if (r)
2297 goto out;
2298 r = 0;
2299 break;
2300 }
2301 case KVM_NMI: {
2302 r = kvm_vcpu_ioctl_nmi(vcpu);
2303 if (r)
2304 goto out;
2305 r = 0;
2306 break;
2307 }
2308 case KVM_SET_CPUID: {
2309 struct kvm_cpuid __user *cpuid_arg = argp;
2310 struct kvm_cpuid cpuid;
2311
2312 r = -EFAULT;
2313 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2314 goto out;
2315 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2316 if (r)
2317 goto out;
2318 break;
2319 }
2320 case KVM_SET_CPUID2: {
2321 struct kvm_cpuid2 __user *cpuid_arg = argp;
2322 struct kvm_cpuid2 cpuid;
2323
2324 r = -EFAULT;
2325 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2326 goto out;
2327 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
2328 cpuid_arg->entries);
2329 if (r)
2330 goto out;
2331 break;
2332 }
2333 case KVM_GET_CPUID2: {
2334 struct kvm_cpuid2 __user *cpuid_arg = argp;
2335 struct kvm_cpuid2 cpuid;
2336
2337 r = -EFAULT;
2338 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2339 goto out;
2340 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
2341 cpuid_arg->entries);
2342 if (r)
2343 goto out;
2344 r = -EFAULT;
2345 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2346 goto out;
2347 r = 0;
2348 break;
2349 }
2350 case KVM_GET_MSRS:
2351 r = msr_io(vcpu, argp, kvm_get_msr, 1);
2352 break;
2353 case KVM_SET_MSRS:
2354 r = msr_io(vcpu, argp, do_set_msr, 0);
2355 break;
2356 case KVM_TPR_ACCESS_REPORTING: {
2357 struct kvm_tpr_access_ctl tac;
2358
2359 r = -EFAULT;
2360 if (copy_from_user(&tac, argp, sizeof tac))
2361 goto out;
2362 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
2363 if (r)
2364 goto out;
2365 r = -EFAULT;
2366 if (copy_to_user(argp, &tac, sizeof tac))
2367 goto out;
2368 r = 0;
2369 break;
2370 };
2371 case KVM_SET_VAPIC_ADDR: {
2372 struct kvm_vapic_addr va;
2373
2374 r = -EINVAL;
2375 if (!irqchip_in_kernel(vcpu->kvm))
2376 goto out;
2377 r = -EFAULT;
2378 if (copy_from_user(&va, argp, sizeof va))
2379 goto out;
2380 r = 0;
2381 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
2382 break;
2383 }
2384 case KVM_X86_SETUP_MCE: {
2385 u64 mcg_cap;
2386
2387 r = -EFAULT;
2388 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
2389 goto out;
2390 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
2391 break;
2392 }
2393 case KVM_X86_SET_MCE: {
2394 struct kvm_x86_mce mce;
2395
2396 r = -EFAULT;
2397 if (copy_from_user(&mce, argp, sizeof mce))
2398 goto out;
2399 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
2400 break;
2401 }
2402 case KVM_GET_VCPU_EVENTS: {
2403 struct kvm_vcpu_events events;
2404
2405 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
2406
2407 r = -EFAULT;
2408 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
2409 break;
2410 r = 0;
2411 break;
2412 }
2413 case KVM_SET_VCPU_EVENTS: {
2414 struct kvm_vcpu_events events;
2415
2416 r = -EFAULT;
2417 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
2418 break;
2419
2420 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
2421 break;
2422 }
2423 case KVM_GET_DEBUGREGS: {
2424 struct kvm_debugregs dbgregs;
2425
2426 kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
2427
2428 r = -EFAULT;
2429 if (copy_to_user(argp, &dbgregs,
2430 sizeof(struct kvm_debugregs)))
2431 break;
2432 r = 0;
2433 break;
2434 }
2435 case KVM_SET_DEBUGREGS: {
2436 struct kvm_debugregs dbgregs;
2437
2438 r = -EFAULT;
2439 if (copy_from_user(&dbgregs, argp,
2440 sizeof(struct kvm_debugregs)))
2441 break;
2442
2443 r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
2444 break;
2445 }
2446 default:
2447 r = -EINVAL;
2448 }
2449 out:
2450 kfree(lapic);
2451 return r;
2452 }
2453
2454 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
2455 {
2456 int ret;
2457
2458 if (addr > (unsigned int)(-3 * PAGE_SIZE))
2459 return -1;
2460 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
2461 return ret;
2462 }
2463
2464 static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
2465 u64 ident_addr)
2466 {
2467 kvm->arch.ept_identity_map_addr = ident_addr;
2468 return 0;
2469 }
2470
2471 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
2472 u32 kvm_nr_mmu_pages)
2473 {
2474 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
2475 return -EINVAL;
2476
2477 mutex_lock(&kvm->slots_lock);
2478 spin_lock(&kvm->mmu_lock);
2479
2480 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
2481 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
2482
2483 spin_unlock(&kvm->mmu_lock);
2484 mutex_unlock(&kvm->slots_lock);
2485 return 0;
2486 }
2487
2488 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
2489 {
2490 return kvm->arch.n_alloc_mmu_pages;
2491 }
2492
2493 gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn)
2494 {
2495 int i;
2496 struct kvm_mem_alias *alias;
2497 struct kvm_mem_aliases *aliases;
2498
2499 aliases = rcu_dereference(kvm->arch.aliases);
2500
2501 for (i = 0; i < aliases->naliases; ++i) {
2502 alias = &aliases->aliases[i];
2503 if (alias->flags & KVM_ALIAS_INVALID)
2504 continue;
2505 if (gfn >= alias->base_gfn
2506 && gfn < alias->base_gfn + alias->npages)
2507 return alias->target_gfn + gfn - alias->base_gfn;
2508 }
2509 return gfn;
2510 }
2511
2512 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
2513 {
2514 int i;
2515 struct kvm_mem_alias *alias;
2516 struct kvm_mem_aliases *aliases;
2517
2518 aliases = rcu_dereference(kvm->arch.aliases);
2519
2520 for (i = 0; i < aliases->naliases; ++i) {
2521 alias = &aliases->aliases[i];
2522 if (gfn >= alias->base_gfn
2523 && gfn < alias->base_gfn + alias->npages)
2524 return alias->target_gfn + gfn - alias->base_gfn;
2525 }
2526 return gfn;
2527 }
2528
2529 /*
2530 * Set a new alias region. Aliases map a portion of physical memory into
2531 * another portion. This is useful for memory windows, for example the PC
2532 * VGA region.
2533 */
2534 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
2535 struct kvm_memory_alias *alias)
2536 {
2537 int r, n;
2538 struct kvm_mem_alias *p;
2539 struct kvm_mem_aliases *aliases, *old_aliases;
2540
2541 r = -EINVAL;
2542 /* General sanity checks */
2543 if (alias->memory_size & (PAGE_SIZE - 1))
2544 goto out;
2545 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
2546 goto out;
2547 if (alias->slot >= KVM_ALIAS_SLOTS)
2548 goto out;
2549 if (alias->guest_phys_addr + alias->memory_size
2550 < alias->guest_phys_addr)
2551 goto out;
2552 if (alias->target_phys_addr + alias->memory_size
2553 < alias->target_phys_addr)
2554 goto out;
2555
2556 r = -ENOMEM;
2557 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2558 if (!aliases)
2559 goto out;
2560
2561 mutex_lock(&kvm->slots_lock);
2562
2563 /* invalidate any gfn reference in case of deletion/shrinking */
2564 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2565 aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID;
2566 old_aliases = kvm->arch.aliases;
2567 rcu_assign_pointer(kvm->arch.aliases, aliases);
2568 synchronize_srcu_expedited(&kvm->srcu);
2569 kvm_mmu_zap_all(kvm);
2570 kfree(old_aliases);
2571
2572 r = -ENOMEM;
2573 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2574 if (!aliases)
2575 goto out_unlock;
2576
2577 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2578
2579 p = &aliases->aliases[alias->slot];
2580 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
2581 p->npages = alias->memory_size >> PAGE_SHIFT;
2582 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
2583 p->flags &= ~(KVM_ALIAS_INVALID);
2584
2585 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
2586 if (aliases->aliases[n - 1].npages)
2587 break;
2588 aliases->naliases = n;
2589
2590 old_aliases = kvm->arch.aliases;
2591 rcu_assign_pointer(kvm->arch.aliases, aliases);
2592 synchronize_srcu_expedited(&kvm->srcu);
2593 kfree(old_aliases);
2594 r = 0;
2595
2596 out_unlock:
2597 mutex_unlock(&kvm->slots_lock);
2598 out:
2599 return r;
2600 }
2601
2602 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2603 {
2604 int r;
2605
2606 r = 0;
2607 switch (chip->chip_id) {
2608 case KVM_IRQCHIP_PIC_MASTER:
2609 memcpy(&chip->chip.pic,
2610 &pic_irqchip(kvm)->pics[0],
2611 sizeof(struct kvm_pic_state));
2612 break;
2613 case KVM_IRQCHIP_PIC_SLAVE:
2614 memcpy(&chip->chip.pic,
2615 &pic_irqchip(kvm)->pics[1],
2616 sizeof(struct kvm_pic_state));
2617 break;
2618 case KVM_IRQCHIP_IOAPIC:
2619 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
2620 break;
2621 default:
2622 r = -EINVAL;
2623 break;
2624 }
2625 return r;
2626 }
2627
2628 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2629 {
2630 int r;
2631
2632 r = 0;
2633 switch (chip->chip_id) {
2634 case KVM_IRQCHIP_PIC_MASTER:
2635 raw_spin_lock(&pic_irqchip(kvm)->lock);
2636 memcpy(&pic_irqchip(kvm)->pics[0],
2637 &chip->chip.pic,
2638 sizeof(struct kvm_pic_state));
2639 raw_spin_unlock(&pic_irqchip(kvm)->lock);
2640 break;
2641 case KVM_IRQCHIP_PIC_SLAVE:
2642 raw_spin_lock(&pic_irqchip(kvm)->lock);
2643 memcpy(&pic_irqchip(kvm)->pics[1],
2644 &chip->chip.pic,
2645 sizeof(struct kvm_pic_state));
2646 raw_spin_unlock(&pic_irqchip(kvm)->lock);
2647 break;
2648 case KVM_IRQCHIP_IOAPIC:
2649 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
2650 break;
2651 default:
2652 r = -EINVAL;
2653 break;
2654 }
2655 kvm_pic_update_irq(pic_irqchip(kvm));
2656 return r;
2657 }
2658
2659 static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2660 {
2661 int r = 0;
2662
2663 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2664 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
2665 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2666 return r;
2667 }
2668
2669 static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2670 {
2671 int r = 0;
2672
2673 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2674 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
2675 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
2676 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2677 return r;
2678 }
2679
2680 static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2681 {
2682 int r = 0;
2683
2684 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2685 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
2686 sizeof(ps->channels));
2687 ps->flags = kvm->arch.vpit->pit_state.flags;
2688 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2689 return r;
2690 }
2691
2692 static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2693 {
2694 int r = 0, start = 0;
2695 u32 prev_legacy, cur_legacy;
2696 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2697 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
2698 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
2699 if (!prev_legacy && cur_legacy)
2700 start = 1;
2701 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
2702 sizeof(kvm->arch.vpit->pit_state.channels));
2703 kvm->arch.vpit->pit_state.flags = ps->flags;
2704 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
2705 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2706 return r;
2707 }
2708
2709 static int kvm_vm_ioctl_reinject(struct kvm *kvm,
2710 struct kvm_reinject_control *control)
2711 {
2712 if (!kvm->arch.vpit)
2713 return -ENXIO;
2714 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2715 kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
2716 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2717 return 0;
2718 }
2719
2720 /*
2721 * Get (and clear) the dirty memory log for a memory slot.
2722 */
2723 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
2724 struct kvm_dirty_log *log)
2725 {
2726 int r, i;
2727 struct kvm_memory_slot *memslot;
2728 unsigned long n;
2729 unsigned long is_dirty = 0;
2730 unsigned long *dirty_bitmap = NULL;
2731
2732 mutex_lock(&kvm->slots_lock);
2733
2734 r = -EINVAL;
2735 if (log->slot >= KVM_MEMORY_SLOTS)
2736 goto out;
2737
2738 memslot = &kvm->memslots->memslots[log->slot];
2739 r = -ENOENT;
2740 if (!memslot->dirty_bitmap)
2741 goto out;
2742
2743 n = kvm_dirty_bitmap_bytes(memslot);
2744
2745 r = -ENOMEM;
2746 dirty_bitmap = vmalloc(n);
2747 if (!dirty_bitmap)
2748 goto out;
2749 memset(dirty_bitmap, 0, n);
2750
2751 for (i = 0; !is_dirty && i < n/sizeof(long); i++)
2752 is_dirty = memslot->dirty_bitmap[i];
2753
2754 /* If nothing is dirty, don't bother messing with page tables. */
2755 if (is_dirty) {
2756 struct kvm_memslots *slots, *old_slots;
2757
2758 spin_lock(&kvm->mmu_lock);
2759 kvm_mmu_slot_remove_write_access(kvm, log->slot);
2760 spin_unlock(&kvm->mmu_lock);
2761
2762 slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
2763 if (!slots)
2764 goto out_free;
2765
2766 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
2767 slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
2768
2769 old_slots = kvm->memslots;
2770 rcu_assign_pointer(kvm->memslots, slots);
2771 synchronize_srcu_expedited(&kvm->srcu);
2772 dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap;
2773 kfree(old_slots);
2774 }
2775
2776 r = 0;
2777 if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n))
2778 r = -EFAULT;
2779 out_free:
2780 vfree(dirty_bitmap);
2781 out:
2782 mutex_unlock(&kvm->slots_lock);
2783 return r;
2784 }
2785
2786 long kvm_arch_vm_ioctl(struct file *filp,
2787 unsigned int ioctl, unsigned long arg)
2788 {
2789 struct kvm *kvm = filp->private_data;
2790 void __user *argp = (void __user *)arg;
2791 int r = -ENOTTY;
2792 /*
2793 * This union makes it completely explicit to gcc-3.x
2794 * that these two variables' stack usage should be
2795 * combined, not added together.
2796 */
2797 union {
2798 struct kvm_pit_state ps;
2799 struct kvm_pit_state2 ps2;
2800 struct kvm_memory_alias alias;
2801 struct kvm_pit_config pit_config;
2802 } u;
2803
2804 switch (ioctl) {
2805 case KVM_SET_TSS_ADDR:
2806 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
2807 if (r < 0)
2808 goto out;
2809 break;
2810 case KVM_SET_IDENTITY_MAP_ADDR: {
2811 u64 ident_addr;
2812
2813 r = -EFAULT;
2814 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
2815 goto out;
2816 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
2817 if (r < 0)
2818 goto out;
2819 break;
2820 }
2821 case KVM_SET_MEMORY_REGION: {
2822 struct kvm_memory_region kvm_mem;
2823 struct kvm_userspace_memory_region kvm_userspace_mem;
2824
2825 r = -EFAULT;
2826 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
2827 goto out;
2828 kvm_userspace_mem.slot = kvm_mem.slot;
2829 kvm_userspace_mem.flags = kvm_mem.flags;
2830 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
2831 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
2832 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
2833 if (r)
2834 goto out;
2835 break;
2836 }
2837 case KVM_SET_NR_MMU_PAGES:
2838 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
2839 if (r)
2840 goto out;
2841 break;
2842 case KVM_GET_NR_MMU_PAGES:
2843 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
2844 break;
2845 case KVM_SET_MEMORY_ALIAS:
2846 r = -EFAULT;
2847 if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias)))
2848 goto out;
2849 r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias);
2850 if (r)
2851 goto out;
2852 break;
2853 case KVM_CREATE_IRQCHIP: {
2854 struct kvm_pic *vpic;
2855
2856 mutex_lock(&kvm->lock);
2857 r = -EEXIST;
2858 if (kvm->arch.vpic)
2859 goto create_irqchip_unlock;
2860 r = -ENOMEM;
2861 vpic = kvm_create_pic(kvm);
2862 if (vpic) {
2863 r = kvm_ioapic_init(kvm);
2864 if (r) {
2865 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
2866 &vpic->dev);
2867 kfree(vpic);
2868 goto create_irqchip_unlock;
2869 }
2870 } else
2871 goto create_irqchip_unlock;
2872 smp_wmb();
2873 kvm->arch.vpic = vpic;
2874 smp_wmb();
2875 r = kvm_setup_default_irq_routing(kvm);
2876 if (r) {
2877 mutex_lock(&kvm->irq_lock);
2878 kvm_ioapic_destroy(kvm);
2879 kvm_destroy_pic(kvm);
2880 mutex_unlock(&kvm->irq_lock);
2881 }
2882 create_irqchip_unlock:
2883 mutex_unlock(&kvm->lock);
2884 break;
2885 }
2886 case KVM_CREATE_PIT:
2887 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
2888 goto create_pit;
2889 case KVM_CREATE_PIT2:
2890 r = -EFAULT;
2891 if (copy_from_user(&u.pit_config, argp,
2892 sizeof(struct kvm_pit_config)))
2893 goto out;
2894 create_pit:
2895 mutex_lock(&kvm->slots_lock);
2896 r = -EEXIST;
2897 if (kvm->arch.vpit)
2898 goto create_pit_unlock;
2899 r = -ENOMEM;
2900 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
2901 if (kvm->arch.vpit)
2902 r = 0;
2903 create_pit_unlock:
2904 mutex_unlock(&kvm->slots_lock);
2905 break;
2906 case KVM_IRQ_LINE_STATUS:
2907 case KVM_IRQ_LINE: {
2908 struct kvm_irq_level irq_event;
2909
2910 r = -EFAULT;
2911 if (copy_from_user(&irq_event, argp, sizeof irq_event))
2912 goto out;
2913 r = -ENXIO;
2914 if (irqchip_in_kernel(kvm)) {
2915 __s32 status;
2916 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2917 irq_event.irq, irq_event.level);
2918 if (ioctl == KVM_IRQ_LINE_STATUS) {
2919 r = -EFAULT;
2920 irq_event.status = status;
2921 if (copy_to_user(argp, &irq_event,
2922 sizeof irq_event))
2923 goto out;
2924 }
2925 r = 0;
2926 }
2927 break;
2928 }
2929 case KVM_GET_IRQCHIP: {
2930 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2931 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
2932
2933 r = -ENOMEM;
2934 if (!chip)
2935 goto out;
2936 r = -EFAULT;
2937 if (copy_from_user(chip, argp, sizeof *chip))
2938 goto get_irqchip_out;
2939 r = -ENXIO;
2940 if (!irqchip_in_kernel(kvm))
2941 goto get_irqchip_out;
2942 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
2943 if (r)
2944 goto get_irqchip_out;
2945 r = -EFAULT;
2946 if (copy_to_user(argp, chip, sizeof *chip))
2947 goto get_irqchip_out;
2948 r = 0;
2949 get_irqchip_out:
2950 kfree(chip);
2951 if (r)
2952 goto out;
2953 break;
2954 }
2955 case KVM_SET_IRQCHIP: {
2956 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2957 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
2958
2959 r = -ENOMEM;
2960 if (!chip)
2961 goto out;
2962 r = -EFAULT;
2963 if (copy_from_user(chip, argp, sizeof *chip))
2964 goto set_irqchip_out;
2965 r = -ENXIO;
2966 if (!irqchip_in_kernel(kvm))
2967 goto set_irqchip_out;
2968 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
2969 if (r)
2970 goto set_irqchip_out;
2971 r = 0;
2972 set_irqchip_out:
2973 kfree(chip);
2974 if (r)
2975 goto out;
2976 break;
2977 }
2978 case KVM_GET_PIT: {
2979 r = -EFAULT;
2980 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
2981 goto out;
2982 r = -ENXIO;
2983 if (!kvm->arch.vpit)
2984 goto out;
2985 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
2986 if (r)
2987 goto out;
2988 r = -EFAULT;
2989 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
2990 goto out;
2991 r = 0;
2992 break;
2993 }
2994 case KVM_SET_PIT: {
2995 r = -EFAULT;
2996 if (copy_from_user(&u.ps, argp, sizeof u.ps))
2997 goto out;
2998 r = -ENXIO;
2999 if (!kvm->arch.vpit)
3000 goto out;
3001 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
3002 if (r)
3003 goto out;
3004 r = 0;
3005 break;
3006 }
3007 case KVM_GET_PIT2: {
3008 r = -ENXIO;
3009 if (!kvm->arch.vpit)
3010 goto out;
3011 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
3012 if (r)
3013 goto out;
3014 r = -EFAULT;
3015 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
3016 goto out;
3017 r = 0;
3018 break;
3019 }
3020 case KVM_SET_PIT2: {
3021 r = -EFAULT;
3022 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
3023 goto out;
3024 r = -ENXIO;
3025 if (!kvm->arch.vpit)
3026 goto out;
3027 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
3028 if (r)
3029 goto out;
3030 r = 0;
3031 break;
3032 }
3033 case KVM_REINJECT_CONTROL: {
3034 struct kvm_reinject_control control;
3035 r = -EFAULT;
3036 if (copy_from_user(&control, argp, sizeof(control)))
3037 goto out;
3038 r = kvm_vm_ioctl_reinject(kvm, &control);
3039 if (r)
3040 goto out;
3041 r = 0;
3042 break;
3043 }
3044 case KVM_XEN_HVM_CONFIG: {
3045 r = -EFAULT;
3046 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
3047 sizeof(struct kvm_xen_hvm_config)))
3048 goto out;
3049 r = -EINVAL;
3050 if (kvm->arch.xen_hvm_config.flags)
3051 goto out;
3052 r = 0;
3053 break;
3054 }
3055 case KVM_SET_CLOCK: {
3056 struct timespec now;
3057 struct kvm_clock_data user_ns;
3058 u64 now_ns;
3059 s64 delta;
3060
3061 r = -EFAULT;
3062 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
3063 goto out;
3064
3065 r = -EINVAL;
3066 if (user_ns.flags)
3067 goto out;
3068
3069 r = 0;
3070 ktime_get_ts(&now);
3071 now_ns = timespec_to_ns(&now);
3072 delta = user_ns.clock - now_ns;
3073 kvm->arch.kvmclock_offset = delta;
3074 break;
3075 }
3076 case KVM_GET_CLOCK: {
3077 struct timespec now;
3078 struct kvm_clock_data user_ns;
3079 u64 now_ns;
3080
3081 ktime_get_ts(&now);
3082 now_ns = timespec_to_ns(&now);
3083 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
3084 user_ns.flags = 0;
3085
3086 r = -EFAULT;
3087 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3088 goto out;
3089 r = 0;
3090 break;
3091 }
3092
3093 default:
3094 ;
3095 }
3096 out:
3097 return r;
3098 }
3099
3100 static void kvm_init_msr_list(void)
3101 {
3102 u32 dummy[2];
3103 unsigned i, j;
3104
3105 /* skip the first msrs in the list. KVM-specific */
3106 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
3107 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3108 continue;
3109 if (j < i)
3110 msrs_to_save[j] = msrs_to_save[i];
3111 j++;
3112 }
3113 num_msrs_to_save = j;
3114 }
3115
3116 static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3117 const void *v)
3118 {
3119 if (vcpu->arch.apic &&
3120 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v))
3121 return 0;
3122
3123 return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
3124 }
3125
3126 static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
3127 {
3128 if (vcpu->arch.apic &&
3129 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v))
3130 return 0;
3131
3132 return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
3133 }
3134
3135 static void kvm_set_segment(struct kvm_vcpu *vcpu,
3136 struct kvm_segment *var, int seg)
3137 {
3138 kvm_x86_ops->set_segment(vcpu, var, seg);
3139 }
3140
3141 void kvm_get_segment(struct kvm_vcpu *vcpu,
3142 struct kvm_segment *var, int seg)
3143 {
3144 kvm_x86_ops->get_segment(vcpu, var, seg);
3145 }
3146
3147 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3148 {
3149 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3150 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3151 }
3152
3153 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3154 {
3155 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3156 access |= PFERR_FETCH_MASK;
3157 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3158 }
3159
3160 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3161 {
3162 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3163 access |= PFERR_WRITE_MASK;
3164 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3165 }
3166
3167 /* uses this to access any guest's mapped memory without checking CPL */
3168 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3169 {
3170 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error);
3171 }
3172
3173 static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3174 struct kvm_vcpu *vcpu, u32 access,
3175 u32 *error)
3176 {
3177 void *data = val;
3178 int r = X86EMUL_CONTINUE;
3179
3180 while (bytes) {
3181 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error);
3182 unsigned offset = addr & (PAGE_SIZE-1);
3183 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
3184 int ret;
3185
3186 if (gpa == UNMAPPED_GVA) {
3187 r = X86EMUL_PROPAGATE_FAULT;
3188 goto out;
3189 }
3190 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
3191 if (ret < 0) {
3192 r = X86EMUL_UNHANDLEABLE;
3193 goto out;
3194 }
3195
3196 bytes -= toread;
3197 data += toread;
3198 addr += toread;
3199 }
3200 out:
3201 return r;
3202 }
3203
3204 /* used for instruction fetching */
3205 static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes,
3206 struct kvm_vcpu *vcpu, u32 *error)
3207 {
3208 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3209 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
3210 access | PFERR_FETCH_MASK, error);
3211 }
3212
3213 static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
3214 struct kvm_vcpu *vcpu, u32 *error)
3215 {
3216 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3217 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
3218 error);
3219 }
3220
3221 static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes,
3222 struct kvm_vcpu *vcpu, u32 *error)
3223 {
3224 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error);
3225 }
3226
3227 static int kvm_write_guest_virt_system(gva_t addr, void *val,
3228 unsigned int bytes,
3229 struct kvm_vcpu *vcpu,
3230 u32 *error)
3231 {
3232 void *data = val;
3233 int r = X86EMUL_CONTINUE;
3234
3235 while (bytes) {
3236 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr,
3237 PFERR_WRITE_MASK, error);
3238 unsigned offset = addr & (PAGE_SIZE-1);
3239 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
3240 int ret;
3241
3242 if (gpa == UNMAPPED_GVA) {
3243 r = X86EMUL_PROPAGATE_FAULT;
3244 goto out;
3245 }
3246 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
3247 if (ret < 0) {
3248 r = X86EMUL_UNHANDLEABLE;
3249 goto out;
3250 }
3251
3252 bytes -= towrite;
3253 data += towrite;
3254 addr += towrite;
3255 }
3256 out:
3257 return r;
3258 }
3259
3260 static int emulator_read_emulated(unsigned long addr,
3261 void *val,
3262 unsigned int bytes,
3263 struct kvm_vcpu *vcpu)
3264 {
3265 gpa_t gpa;
3266 u32 error_code;
3267
3268 if (vcpu->mmio_read_completed) {
3269 memcpy(val, vcpu->mmio_data, bytes);
3270 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
3271 vcpu->mmio_phys_addr, *(u64 *)val);
3272 vcpu->mmio_read_completed = 0;
3273 return X86EMUL_CONTINUE;
3274 }
3275
3276 gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, &error_code);
3277
3278 if (gpa == UNMAPPED_GVA) {
3279 kvm_inject_page_fault(vcpu, addr, error_code);
3280 return X86EMUL_PROPAGATE_FAULT;
3281 }
3282
3283 /* For APIC access vmexit */
3284 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3285 goto mmio;
3286
3287 if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL)
3288 == X86EMUL_CONTINUE)
3289 return X86EMUL_CONTINUE;
3290
3291 mmio:
3292 /*
3293 * Is this MMIO handled locally?
3294 */
3295 if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) {
3296 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val);
3297 return X86EMUL_CONTINUE;
3298 }
3299
3300 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
3301
3302 vcpu->mmio_needed = 1;
3303 vcpu->mmio_phys_addr = gpa;
3304 vcpu->mmio_size = bytes;
3305 vcpu->mmio_is_write = 0;
3306
3307 return X86EMUL_UNHANDLEABLE;
3308 }
3309
3310 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
3311 const void *val, int bytes)
3312 {
3313 int ret;
3314
3315 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
3316 if (ret < 0)
3317 return 0;
3318 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
3319 return 1;
3320 }
3321
3322 static int emulator_write_emulated_onepage(unsigned long addr,
3323 const void *val,
3324 unsigned int bytes,
3325 struct kvm_vcpu *vcpu,
3326 bool mmu_only)
3327 {
3328 gpa_t gpa;
3329 u32 error_code;
3330
3331 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, &error_code);
3332
3333 if (gpa == UNMAPPED_GVA) {
3334 kvm_inject_page_fault(vcpu, addr, error_code);
3335 return X86EMUL_PROPAGATE_FAULT;
3336 }
3337
3338 /* For APIC access vmexit */
3339 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3340 goto mmio;
3341
3342 if (mmu_only) {
3343 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
3344 return X86EMUL_CONTINUE;
3345 }
3346 if (emulator_write_phys(vcpu, gpa, val, bytes))
3347 return X86EMUL_CONTINUE;
3348
3349 mmio:
3350 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
3351 /*
3352 * Is this MMIO handled locally?
3353 */
3354 if (!vcpu_mmio_write(vcpu, gpa, bytes, val))
3355 return X86EMUL_CONTINUE;
3356
3357 vcpu->mmio_needed = 1;
3358 vcpu->mmio_phys_addr = gpa;
3359 vcpu->mmio_size = bytes;
3360 vcpu->mmio_is_write = 1;
3361 memcpy(vcpu->mmio_data, val, bytes);
3362
3363 return X86EMUL_CONTINUE;
3364 }
3365
3366 int __emulator_write_emulated(unsigned long addr,
3367 const void *val,
3368 unsigned int bytes,
3369 struct kvm_vcpu *vcpu,
3370 bool mmu_only)
3371 {
3372 /* Crossing a page boundary? */
3373 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
3374 int rc, now;
3375
3376 now = -addr & ~PAGE_MASK;
3377 rc = emulator_write_emulated_onepage(addr, val, now, vcpu,
3378 mmu_only);
3379 if (rc != X86EMUL_CONTINUE)
3380 return rc;
3381 addr += now;
3382 val += now;
3383 bytes -= now;
3384 }
3385 return emulator_write_emulated_onepage(addr, val, bytes, vcpu,
3386 mmu_only);
3387 }
3388
3389 int emulator_write_emulated(unsigned long addr,
3390 const void *val,
3391 unsigned int bytes,
3392 struct kvm_vcpu *vcpu)
3393 {
3394 return __emulator_write_emulated(addr, val, bytes, vcpu, false);
3395 }
3396 EXPORT_SYMBOL_GPL(emulator_write_emulated);
3397
3398 #define CMPXCHG_TYPE(t, ptr, old, new) \
3399 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3400
3401 #ifdef CONFIG_X86_64
3402 # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3403 #else
3404 # define CMPXCHG64(ptr, old, new) \
3405 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
3406 #endif
3407
3408 static int emulator_cmpxchg_emulated(unsigned long addr,
3409 const void *old,
3410 const void *new,
3411 unsigned int bytes,
3412 struct kvm_vcpu *vcpu)
3413 {
3414 gpa_t gpa;
3415 struct page *page;
3416 char *kaddr;
3417 bool exchanged;
3418
3419 /* guests cmpxchg8b have to be emulated atomically */
3420 if (bytes > 8 || (bytes & (bytes - 1)))
3421 goto emul_write;
3422
3423 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
3424
3425 if (gpa == UNMAPPED_GVA ||
3426 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3427 goto emul_write;
3428
3429 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
3430 goto emul_write;
3431
3432 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
3433
3434 kaddr = kmap_atomic(page, KM_USER0);
3435 kaddr += offset_in_page(gpa);
3436 switch (bytes) {
3437 case 1:
3438 exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
3439 break;
3440 case 2:
3441 exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
3442 break;
3443 case 4:
3444 exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
3445 break;
3446 case 8:
3447 exchanged = CMPXCHG64(kaddr, old, new);
3448 break;
3449 default:
3450 BUG();
3451 }
3452 kunmap_atomic(kaddr, KM_USER0);
3453 kvm_release_page_dirty(page);
3454
3455 if (!exchanged)
3456 return X86EMUL_CMPXCHG_FAILED;
3457
3458 return __emulator_write_emulated(addr, new, bytes, vcpu, true);
3459
3460 emul_write:
3461 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
3462
3463 return emulator_write_emulated(addr, new, bytes, vcpu);
3464 }
3465
3466 static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
3467 {
3468 /* TODO: String I/O for in kernel device */
3469 int r;
3470
3471 if (vcpu->arch.pio.in)
3472 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
3473 vcpu->arch.pio.size, pd);
3474 else
3475 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
3476 vcpu->arch.pio.port, vcpu->arch.pio.size,
3477 pd);
3478 return r;
3479 }
3480
3481
3482 static int emulator_pio_in_emulated(int size, unsigned short port, void *val,
3483 unsigned int count, struct kvm_vcpu *vcpu)
3484 {
3485 if (vcpu->arch.pio.count)
3486 goto data_avail;
3487
3488 trace_kvm_pio(1, port, size, 1);
3489
3490 vcpu->arch.pio.port = port;
3491 vcpu->arch.pio.in = 1;
3492 vcpu->arch.pio.count = count;
3493 vcpu->arch.pio.size = size;
3494
3495 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
3496 data_avail:
3497 memcpy(val, vcpu->arch.pio_data, size * count);
3498 vcpu->arch.pio.count = 0;
3499 return 1;
3500 }
3501
3502 vcpu->run->exit_reason = KVM_EXIT_IO;
3503 vcpu->run->io.direction = KVM_EXIT_IO_IN;
3504 vcpu->run->io.size = size;
3505 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3506 vcpu->run->io.count = count;
3507 vcpu->run->io.port = port;
3508
3509 return 0;
3510 }
3511
3512 static int emulator_pio_out_emulated(int size, unsigned short port,
3513 const void *val, unsigned int count,
3514 struct kvm_vcpu *vcpu)
3515 {
3516 trace_kvm_pio(0, port, size, 1);
3517
3518 vcpu->arch.pio.port = port;
3519 vcpu->arch.pio.in = 0;
3520 vcpu->arch.pio.count = count;
3521 vcpu->arch.pio.size = size;
3522
3523 memcpy(vcpu->arch.pio_data, val, size * count);
3524
3525 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
3526 vcpu->arch.pio.count = 0;
3527 return 1;
3528 }
3529
3530 vcpu->run->exit_reason = KVM_EXIT_IO;
3531 vcpu->run->io.direction = KVM_EXIT_IO_OUT;
3532 vcpu->run->io.size = size;
3533 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3534 vcpu->run->io.count = count;
3535 vcpu->run->io.port = port;
3536
3537 return 0;
3538 }
3539
3540 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
3541 {
3542 return kvm_x86_ops->get_segment_base(vcpu, seg);
3543 }
3544
3545 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
3546 {
3547 kvm_mmu_invlpg(vcpu, address);
3548 return X86EMUL_CONTINUE;
3549 }
3550
3551 int emulate_clts(struct kvm_vcpu *vcpu)
3552 {
3553 kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
3554 kvm_x86_ops->fpu_activate(vcpu);
3555 return X86EMUL_CONTINUE;
3556 }
3557
3558 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
3559 {
3560 return kvm_get_dr(ctxt->vcpu, dr, dest);
3561 }
3562
3563 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
3564 {
3565 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
3566
3567 return kvm_set_dr(ctxt->vcpu, dr, value & mask);
3568 }
3569
3570 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
3571 {
3572 u8 opcodes[4];
3573 unsigned long rip = kvm_rip_read(vcpu);
3574 unsigned long rip_linear;
3575
3576 if (!printk_ratelimit())
3577 return;
3578
3579 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
3580
3581 kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu, NULL);
3582
3583 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
3584 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
3585 }
3586 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
3587
3588 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
3589 {
3590 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
3591 }
3592
3593 static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu)
3594 {
3595 unsigned long value;
3596
3597 switch (cr) {
3598 case 0:
3599 value = kvm_read_cr0(vcpu);
3600 break;
3601 case 2:
3602 value = vcpu->arch.cr2;
3603 break;
3604 case 3:
3605 value = vcpu->arch.cr3;
3606 break;
3607 case 4:
3608 value = kvm_read_cr4(vcpu);
3609 break;
3610 case 8:
3611 value = kvm_get_cr8(vcpu);
3612 break;
3613 default:
3614 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
3615 return 0;
3616 }
3617
3618 return value;
3619 }
3620
3621 static void emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu)
3622 {
3623 switch (cr) {
3624 case 0:
3625 kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
3626 break;
3627 case 2:
3628 vcpu->arch.cr2 = val;
3629 break;
3630 case 3:
3631 kvm_set_cr3(vcpu, val);
3632 break;
3633 case 4:
3634 kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
3635 break;
3636 case 8:
3637 kvm_set_cr8(vcpu, val & 0xfUL);
3638 break;
3639 default:
3640 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
3641 }
3642 }
3643
3644 static int emulator_get_cpl(struct kvm_vcpu *vcpu)
3645 {
3646 return kvm_x86_ops->get_cpl(vcpu);
3647 }
3648
3649 static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu)
3650 {
3651 kvm_x86_ops->get_gdt(vcpu, dt);
3652 }
3653
3654 static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg,
3655 struct kvm_vcpu *vcpu)
3656 {
3657 struct kvm_segment var;
3658
3659 kvm_get_segment(vcpu, &var, seg);
3660
3661 if (var.unusable)
3662 return false;
3663
3664 if (var.g)
3665 var.limit >>= 12;
3666 set_desc_limit(desc, var.limit);
3667 set_desc_base(desc, (unsigned long)var.base);
3668 desc->type = var.type;
3669 desc->s = var.s;
3670 desc->dpl = var.dpl;
3671 desc->p = var.present;
3672 desc->avl = var.avl;
3673 desc->l = var.l;
3674 desc->d = var.db;
3675 desc->g = var.g;
3676
3677 return true;
3678 }
3679
3680 static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg,
3681 struct kvm_vcpu *vcpu)
3682 {
3683 struct kvm_segment var;
3684
3685 /* needed to preserve selector */
3686 kvm_get_segment(vcpu, &var, seg);
3687
3688 var.base = get_desc_base(desc);
3689 var.limit = get_desc_limit(desc);
3690 if (desc->g)
3691 var.limit = (var.limit << 12) | 0xfff;
3692 var.type = desc->type;
3693 var.present = desc->p;
3694 var.dpl = desc->dpl;
3695 var.db = desc->d;
3696 var.s = desc->s;
3697 var.l = desc->l;
3698 var.g = desc->g;
3699 var.avl = desc->avl;
3700 var.present = desc->p;
3701 var.unusable = !var.present;
3702 var.padding = 0;
3703
3704 kvm_set_segment(vcpu, &var, seg);
3705 return;
3706 }
3707
3708 static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu)
3709 {
3710 struct kvm_segment kvm_seg;
3711
3712 kvm_get_segment(vcpu, &kvm_seg, seg);
3713 return kvm_seg.selector;
3714 }
3715
3716 static void emulator_set_segment_selector(u16 sel, int seg,
3717 struct kvm_vcpu *vcpu)
3718 {
3719 struct kvm_segment kvm_seg;
3720
3721 kvm_get_segment(vcpu, &kvm_seg, seg);
3722 kvm_seg.selector = sel;
3723 kvm_set_segment(vcpu, &kvm_seg, seg);
3724 }
3725
3726 static void emulator_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
3727 {
3728 kvm_x86_ops->set_rflags(vcpu, rflags);
3729 }
3730
3731 static struct x86_emulate_ops emulate_ops = {
3732 .read_std = kvm_read_guest_virt_system,
3733 .write_std = kvm_write_guest_virt_system,
3734 .fetch = kvm_fetch_guest_virt,
3735 .read_emulated = emulator_read_emulated,
3736 .write_emulated = emulator_write_emulated,
3737 .cmpxchg_emulated = emulator_cmpxchg_emulated,
3738 .pio_in_emulated = emulator_pio_in_emulated,
3739 .pio_out_emulated = emulator_pio_out_emulated,
3740 .get_cached_descriptor = emulator_get_cached_descriptor,
3741 .set_cached_descriptor = emulator_set_cached_descriptor,
3742 .get_segment_selector = emulator_get_segment_selector,
3743 .set_segment_selector = emulator_set_segment_selector,
3744 .get_gdt = emulator_get_gdt,
3745 .get_cr = emulator_get_cr,
3746 .set_cr = emulator_set_cr,
3747 .cpl = emulator_get_cpl,
3748 .set_rflags = emulator_set_rflags,
3749 };
3750
3751 static void cache_all_regs(struct kvm_vcpu *vcpu)
3752 {
3753 kvm_register_read(vcpu, VCPU_REGS_RAX);
3754 kvm_register_read(vcpu, VCPU_REGS_RSP);
3755 kvm_register_read(vcpu, VCPU_REGS_RIP);
3756 vcpu->arch.regs_dirty = ~0;
3757 }
3758
3759 int emulate_instruction(struct kvm_vcpu *vcpu,
3760 unsigned long cr2,
3761 u16 error_code,
3762 int emulation_type)
3763 {
3764 int r, shadow_mask;
3765 struct decode_cache *c;
3766 struct kvm_run *run = vcpu->run;
3767
3768 kvm_clear_exception_queue(vcpu);
3769 vcpu->arch.mmio_fault_cr2 = cr2;
3770 /*
3771 * TODO: fix emulate.c to use guest_read/write_register
3772 * instead of direct ->regs accesses, can save hundred cycles
3773 * on Intel for instructions that don't read/change RSP, for
3774 * for example.
3775 */
3776 cache_all_regs(vcpu);
3777
3778 vcpu->mmio_is_write = 0;
3779
3780 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
3781 int cs_db, cs_l;
3782 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
3783
3784 vcpu->arch.emulate_ctxt.vcpu = vcpu;
3785 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
3786 vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
3787 vcpu->arch.emulate_ctxt.mode =
3788 (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
3789 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
3790 ? X86EMUL_MODE_VM86 : cs_l
3791 ? X86EMUL_MODE_PROT64 : cs_db
3792 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
3793
3794 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
3795 trace_kvm_emulate_insn_start(vcpu);
3796
3797 /* Only allow emulation of specific instructions on #UD
3798 * (namely VMMCALL, sysenter, sysexit, syscall)*/
3799 c = &vcpu->arch.emulate_ctxt.decode;
3800 if (emulation_type & EMULTYPE_TRAP_UD) {
3801 if (!c->twobyte)
3802 return EMULATE_FAIL;
3803 switch (c->b) {
3804 case 0x01: /* VMMCALL */
3805 if (c->modrm_mod != 3 || c->modrm_rm != 1)
3806 return EMULATE_FAIL;
3807 break;
3808 case 0x34: /* sysenter */
3809 case 0x35: /* sysexit */
3810 if (c->modrm_mod != 0 || c->modrm_rm != 0)
3811 return EMULATE_FAIL;
3812 break;
3813 case 0x05: /* syscall */
3814 if (c->modrm_mod != 0 || c->modrm_rm != 0)
3815 return EMULATE_FAIL;
3816 break;
3817 default:
3818 return EMULATE_FAIL;
3819 }
3820
3821 if (!(c->modrm_reg == 0 || c->modrm_reg == 3))
3822 return EMULATE_FAIL;
3823 }
3824
3825 ++vcpu->stat.insn_emulation;
3826 if (r) {
3827 ++vcpu->stat.insn_emulation_fail;
3828 trace_kvm_emulate_insn_failed(vcpu);
3829 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
3830 return EMULATE_DONE;
3831 return EMULATE_FAIL;
3832 }
3833 }
3834
3835 if (emulation_type & EMULTYPE_SKIP) {
3836 kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip);
3837 return EMULATE_DONE;
3838 }
3839
3840 restart:
3841 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
3842 shadow_mask = vcpu->arch.emulate_ctxt.interruptibility;
3843
3844 if (r == 0)
3845 kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask);
3846
3847 if (vcpu->arch.pio.count) {
3848 if (!vcpu->arch.pio.in)
3849 vcpu->arch.pio.count = 0;
3850 return EMULATE_DO_MMIO;
3851 }
3852
3853 if (r || vcpu->mmio_is_write) {
3854 run->exit_reason = KVM_EXIT_MMIO;
3855 run->mmio.phys_addr = vcpu->mmio_phys_addr;
3856 memcpy(run->mmio.data, vcpu->mmio_data, 8);
3857 run->mmio.len = vcpu->mmio_size;
3858 run->mmio.is_write = vcpu->mmio_is_write;
3859 }
3860
3861 if (r) {
3862 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
3863 goto done;
3864 if (!vcpu->mmio_needed) {
3865 ++vcpu->stat.insn_emulation_fail;
3866 trace_kvm_emulate_insn_failed(vcpu);
3867 kvm_report_emulation_failure(vcpu, "mmio");
3868 return EMULATE_FAIL;
3869 }
3870 return EMULATE_DO_MMIO;
3871 }
3872
3873 if (vcpu->mmio_is_write) {
3874 vcpu->mmio_needed = 0;
3875 return EMULATE_DO_MMIO;
3876 }
3877
3878 done:
3879 if (vcpu->arch.exception.pending)
3880 vcpu->arch.emulate_ctxt.restart = false;
3881
3882 if (vcpu->arch.emulate_ctxt.restart)
3883 goto restart;
3884
3885 return EMULATE_DONE;
3886 }
3887 EXPORT_SYMBOL_GPL(emulate_instruction);
3888
3889 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
3890 {
3891 unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
3892 int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu);
3893 /* do not return to emulator after return from userspace */
3894 vcpu->arch.pio.count = 0;
3895 return ret;
3896 }
3897 EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
3898
3899 static void bounce_off(void *info)
3900 {
3901 /* nothing */
3902 }
3903
3904 static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
3905 void *data)
3906 {
3907 struct cpufreq_freqs *freq = data;
3908 struct kvm *kvm;
3909 struct kvm_vcpu *vcpu;
3910 int i, send_ipi = 0;
3911
3912 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
3913 return 0;
3914 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
3915 return 0;
3916 per_cpu(cpu_tsc_khz, freq->cpu) = freq->new;
3917
3918 spin_lock(&kvm_lock);
3919 list_for_each_entry(kvm, &vm_list, vm_list) {
3920 kvm_for_each_vcpu(i, vcpu, kvm) {
3921 if (vcpu->cpu != freq->cpu)
3922 continue;
3923 if (!kvm_request_guest_time_update(vcpu))
3924 continue;
3925 if (vcpu->cpu != smp_processor_id())
3926 send_ipi++;
3927 }
3928 }
3929 spin_unlock(&kvm_lock);
3930
3931 if (freq->old < freq->new && send_ipi) {
3932 /*
3933 * We upscale the frequency. Must make the guest
3934 * doesn't see old kvmclock values while running with
3935 * the new frequency, otherwise we risk the guest sees
3936 * time go backwards.
3937 *
3938 * In case we update the frequency for another cpu
3939 * (which might be in guest context) send an interrupt
3940 * to kick the cpu out of guest context. Next time
3941 * guest context is entered kvmclock will be updated,
3942 * so the guest will not see stale values.
3943 */
3944 smp_call_function_single(freq->cpu, bounce_off, NULL, 1);
3945 }
3946 return 0;
3947 }
3948
3949 static struct notifier_block kvmclock_cpufreq_notifier_block = {
3950 .notifier_call = kvmclock_cpufreq_notifier
3951 };
3952
3953 static void kvm_timer_init(void)
3954 {
3955 int cpu;
3956
3957 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
3958 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
3959 CPUFREQ_TRANSITION_NOTIFIER);
3960 for_each_online_cpu(cpu) {
3961 unsigned long khz = cpufreq_get(cpu);
3962 if (!khz)
3963 khz = tsc_khz;
3964 per_cpu(cpu_tsc_khz, cpu) = khz;
3965 }
3966 } else {
3967 for_each_possible_cpu(cpu)
3968 per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
3969 }
3970 }
3971
3972 int kvm_arch_init(void *opaque)
3973 {
3974 int r;
3975 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
3976
3977 if (kvm_x86_ops) {
3978 printk(KERN_ERR "kvm: already loaded the other module\n");
3979 r = -EEXIST;
3980 goto out;
3981 }
3982
3983 if (!ops->cpu_has_kvm_support()) {
3984 printk(KERN_ERR "kvm: no hardware support\n");
3985 r = -EOPNOTSUPP;
3986 goto out;
3987 }
3988 if (ops->disabled_by_bios()) {
3989 printk(KERN_ERR "kvm: disabled by bios\n");
3990 r = -EOPNOTSUPP;
3991 goto out;
3992 }
3993
3994 r = kvm_mmu_module_init();
3995 if (r)
3996 goto out;
3997
3998 kvm_init_msr_list();
3999
4000 kvm_x86_ops = ops;
4001 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
4002 kvm_mmu_set_base_ptes(PT_PRESENT_MASK);
4003 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
4004 PT_DIRTY_MASK, PT64_NX_MASK, 0);
4005
4006 kvm_timer_init();
4007
4008 return 0;
4009
4010 out:
4011 return r;
4012 }
4013
4014 void kvm_arch_exit(void)
4015 {
4016 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4017 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
4018 CPUFREQ_TRANSITION_NOTIFIER);
4019 kvm_x86_ops = NULL;
4020 kvm_mmu_module_exit();
4021 }
4022
4023 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
4024 {
4025 ++vcpu->stat.halt_exits;
4026 if (irqchip_in_kernel(vcpu->kvm)) {
4027 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
4028 return 1;
4029 } else {
4030 vcpu->run->exit_reason = KVM_EXIT_HLT;
4031 return 0;
4032 }
4033 }
4034 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
4035
4036 static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0,
4037 unsigned long a1)
4038 {
4039 if (is_long_mode(vcpu))
4040 return a0;
4041 else
4042 return a0 | ((gpa_t)a1 << 32);
4043 }
4044
4045 int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
4046 {
4047 u64 param, ingpa, outgpa, ret;
4048 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
4049 bool fast, longmode;
4050 int cs_db, cs_l;
4051
4052 /*
4053 * hypercall generates UD from non zero cpl and real mode
4054 * per HYPER-V spec
4055 */
4056 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
4057 kvm_queue_exception(vcpu, UD_VECTOR);
4058 return 0;
4059 }
4060
4061 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4062 longmode = is_long_mode(vcpu) && cs_l == 1;
4063
4064 if (!longmode) {
4065 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
4066 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
4067 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
4068 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
4069 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
4070 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
4071 }
4072 #ifdef CONFIG_X86_64
4073 else {
4074 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
4075 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
4076 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
4077 }
4078 #endif
4079
4080 code = param & 0xffff;
4081 fast = (param >> 16) & 0x1;
4082 rep_cnt = (param >> 32) & 0xfff;
4083 rep_idx = (param >> 48) & 0xfff;
4084
4085 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
4086
4087 switch (code) {
4088 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
4089 kvm_vcpu_on_spin(vcpu);
4090 break;
4091 default:
4092 res = HV_STATUS_INVALID_HYPERCALL_CODE;
4093 break;
4094 }
4095
4096 ret = res | (((u64)rep_done & 0xfff) << 32);
4097 if (longmode) {
4098 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
4099 } else {
4100 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
4101 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
4102 }
4103
4104 return 1;
4105 }
4106
4107 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
4108 {
4109 unsigned long nr, a0, a1, a2, a3, ret;
4110 int r = 1;
4111
4112 if (kvm_hv_hypercall_enabled(vcpu->kvm))
4113 return kvm_hv_hypercall(vcpu);
4114
4115 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
4116 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
4117 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
4118 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
4119 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
4120
4121 trace_kvm_hypercall(nr, a0, a1, a2, a3);
4122
4123 if (!is_long_mode(vcpu)) {
4124 nr &= 0xFFFFFFFF;
4125 a0 &= 0xFFFFFFFF;
4126 a1 &= 0xFFFFFFFF;
4127 a2 &= 0xFFFFFFFF;
4128 a3 &= 0xFFFFFFFF;
4129 }
4130
4131 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
4132 ret = -KVM_EPERM;
4133 goto out;
4134 }
4135
4136 switch (nr) {
4137 case KVM_HC_VAPIC_POLL_IRQ:
4138 ret = 0;
4139 break;
4140 case KVM_HC_MMU_OP:
4141 r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret);
4142 break;
4143 default:
4144 ret = -KVM_ENOSYS;
4145 break;
4146 }
4147 out:
4148 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
4149 ++vcpu->stat.hypercalls;
4150 return r;
4151 }
4152 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
4153
4154 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
4155 {
4156 char instruction[3];
4157 unsigned long rip = kvm_rip_read(vcpu);
4158
4159 /*
4160 * Blow out the MMU to ensure that no other VCPU has an active mapping
4161 * to ensure that the updated hypercall appears atomically across all
4162 * VCPUs.
4163 */
4164 kvm_mmu_zap_all(vcpu->kvm);
4165
4166 kvm_x86_ops->patch_hypercall(vcpu, instruction);
4167
4168 return __emulator_write_emulated(rip, instruction, 3, vcpu, false);
4169 }
4170
4171 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
4172 {
4173 struct desc_ptr dt = { limit, base };
4174
4175 kvm_x86_ops->set_gdt(vcpu, &dt);
4176 }
4177
4178 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
4179 {
4180 struct desc_ptr dt = { limit, base };
4181
4182 kvm_x86_ops->set_idt(vcpu, &dt);
4183 }
4184
4185 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
4186 {
4187 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
4188 int j, nent = vcpu->arch.cpuid_nent;
4189
4190 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
4191 /* when no next entry is found, the current entry[i] is reselected */
4192 for (j = i + 1; ; j = (j + 1) % nent) {
4193 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
4194 if (ej->function == e->function) {
4195 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
4196 return j;
4197 }
4198 }
4199 return 0; /* silence gcc, even though control never reaches here */
4200 }
4201
4202 /* find an entry with matching function, matching index (if needed), and that
4203 * should be read next (if it's stateful) */
4204 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
4205 u32 function, u32 index)
4206 {
4207 if (e->function != function)
4208 return 0;
4209 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
4210 return 0;
4211 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
4212 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
4213 return 0;
4214 return 1;
4215 }
4216
4217 struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
4218 u32 function, u32 index)
4219 {
4220 int i;
4221 struct kvm_cpuid_entry2 *best = NULL;
4222
4223 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
4224 struct kvm_cpuid_entry2 *e;
4225
4226 e = &vcpu->arch.cpuid_entries[i];
4227 if (is_matching_cpuid_entry(e, function, index)) {
4228 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
4229 move_to_next_stateful_cpuid_entry(vcpu, i);
4230 best = e;
4231 break;
4232 }
4233 /*
4234 * Both basic or both extended?
4235 */
4236 if (((e->function ^ function) & 0x80000000) == 0)
4237 if (!best || e->function > best->function)
4238 best = e;
4239 }
4240 return best;
4241 }
4242 EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry);
4243
4244 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
4245 {
4246 struct kvm_cpuid_entry2 *best;
4247
4248 best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0);
4249 if (!best || best->eax < 0x80000008)
4250 goto not_found;
4251 best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
4252 if (best)
4253 return best->eax & 0xff;
4254 not_found:
4255 return 36;
4256 }
4257
4258 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
4259 {
4260 u32 function, index;
4261 struct kvm_cpuid_entry2 *best;
4262
4263 function = kvm_register_read(vcpu, VCPU_REGS_RAX);
4264 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
4265 kvm_register_write(vcpu, VCPU_REGS_RAX, 0);
4266 kvm_register_write(vcpu, VCPU_REGS_RBX, 0);
4267 kvm_register_write(vcpu, VCPU_REGS_RCX, 0);
4268 kvm_register_write(vcpu, VCPU_REGS_RDX, 0);
4269 best = kvm_find_cpuid_entry(vcpu, function, index);
4270 if (best) {
4271 kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax);
4272 kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx);
4273 kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx);
4274 kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx);
4275 }
4276 kvm_x86_ops->skip_emulated_instruction(vcpu);
4277 trace_kvm_cpuid(function,
4278 kvm_register_read(vcpu, VCPU_REGS_RAX),
4279 kvm_register_read(vcpu, VCPU_REGS_RBX),
4280 kvm_register_read(vcpu, VCPU_REGS_RCX),
4281 kvm_register_read(vcpu, VCPU_REGS_RDX));
4282 }
4283 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
4284
4285 /*
4286 * Check if userspace requested an interrupt window, and that the
4287 * interrupt window is open.
4288 *
4289 * No need to exit to userspace if we already have an interrupt queued.
4290 */
4291 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
4292 {
4293 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
4294 vcpu->run->request_interrupt_window &&
4295 kvm_arch_interrupt_allowed(vcpu));
4296 }
4297
4298 static void post_kvm_run_save(struct kvm_vcpu *vcpu)
4299 {
4300 struct kvm_run *kvm_run = vcpu->run;
4301
4302 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
4303 kvm_run->cr8 = kvm_get_cr8(vcpu);
4304 kvm_run->apic_base = kvm_get_apic_base(vcpu);
4305 if (irqchip_in_kernel(vcpu->kvm))
4306 kvm_run->ready_for_interrupt_injection = 1;
4307 else
4308 kvm_run->ready_for_interrupt_injection =
4309 kvm_arch_interrupt_allowed(vcpu) &&
4310 !kvm_cpu_has_interrupt(vcpu) &&
4311 !kvm_event_needs_reinjection(vcpu);
4312 }
4313
4314 static void vapic_enter(struct kvm_vcpu *vcpu)
4315 {
4316 struct kvm_lapic *apic = vcpu->arch.apic;
4317 struct page *page;
4318
4319 if (!apic || !apic->vapic_addr)
4320 return;
4321
4322 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
4323
4324 vcpu->arch.apic->vapic_page = page;
4325 }
4326
4327 static void vapic_exit(struct kvm_vcpu *vcpu)
4328 {
4329 struct kvm_lapic *apic = vcpu->arch.apic;
4330 int idx;
4331
4332 if (!apic || !apic->vapic_addr)
4333 return;
4334
4335 idx = srcu_read_lock(&vcpu->kvm->srcu);
4336 kvm_release_page_dirty(apic->vapic_page);
4337 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
4338 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4339 }
4340
4341 static void update_cr8_intercept(struct kvm_vcpu *vcpu)
4342 {
4343 int max_irr, tpr;
4344
4345 if (!kvm_x86_ops->update_cr8_intercept)
4346 return;
4347
4348 if (!vcpu->arch.apic)
4349 return;
4350
4351 if (!vcpu->arch.apic->vapic_addr)
4352 max_irr = kvm_lapic_find_highest_irr(vcpu);
4353 else
4354 max_irr = -1;
4355
4356 if (max_irr != -1)
4357 max_irr >>= 4;
4358
4359 tpr = kvm_lapic_get_cr8(vcpu);
4360
4361 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
4362 }
4363
4364 static void inject_pending_event(struct kvm_vcpu *vcpu)
4365 {
4366 /* try to reinject previous events if any */
4367 if (vcpu->arch.exception.pending) {
4368 trace_kvm_inj_exception(vcpu->arch.exception.nr,
4369 vcpu->arch.exception.has_error_code,
4370 vcpu->arch.exception.error_code);
4371 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
4372 vcpu->arch.exception.has_error_code,
4373 vcpu->arch.exception.error_code);
4374 return;
4375 }
4376
4377 if (vcpu->arch.nmi_injected) {
4378 kvm_x86_ops->set_nmi(vcpu);
4379 return;
4380 }
4381
4382 if (vcpu->arch.interrupt.pending) {
4383 kvm_x86_ops->set_irq(vcpu);
4384 return;
4385 }
4386
4387 /* try to inject new event if pending */
4388 if (vcpu->arch.nmi_pending) {
4389 if (kvm_x86_ops->nmi_allowed(vcpu)) {
4390 vcpu->arch.nmi_pending = false;
4391 vcpu->arch.nmi_injected = true;
4392 kvm_x86_ops->set_nmi(vcpu);
4393 }
4394 } else if (kvm_cpu_has_interrupt(vcpu)) {
4395 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
4396 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
4397 false);
4398 kvm_x86_ops->set_irq(vcpu);
4399 }
4400 }
4401 }
4402
4403 static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
4404 {
4405 int r;
4406 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
4407 vcpu->run->request_interrupt_window;
4408
4409 if (vcpu->requests)
4410 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
4411 kvm_mmu_unload(vcpu);
4412
4413 r = kvm_mmu_reload(vcpu);
4414 if (unlikely(r))
4415 goto out;
4416
4417 if (vcpu->requests) {
4418 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
4419 __kvm_migrate_timers(vcpu);
4420 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests))
4421 kvm_write_guest_time(vcpu);
4422 if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests))
4423 kvm_mmu_sync_roots(vcpu);
4424 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
4425 kvm_x86_ops->tlb_flush(vcpu);
4426 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
4427 &vcpu->requests)) {
4428 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
4429 r = 0;
4430 goto out;
4431 }
4432 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) {
4433 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
4434 r = 0;
4435 goto out;
4436 }
4437 if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) {
4438 vcpu->fpu_active = 0;
4439 kvm_x86_ops->fpu_deactivate(vcpu);
4440 }
4441 }
4442
4443 preempt_disable();
4444
4445 kvm_x86_ops->prepare_guest_switch(vcpu);
4446 if (vcpu->fpu_active)
4447 kvm_load_guest_fpu(vcpu);
4448
4449 local_irq_disable();
4450
4451 clear_bit(KVM_REQ_KICK, &vcpu->requests);
4452 smp_mb__after_clear_bit();
4453
4454 if (vcpu->requests || need_resched() || signal_pending(current)) {
4455 set_bit(KVM_REQ_KICK, &vcpu->requests);
4456 local_irq_enable();
4457 preempt_enable();
4458 r = 1;
4459 goto out;
4460 }
4461
4462 inject_pending_event(vcpu);
4463
4464 /* enable NMI/IRQ window open exits if needed */
4465 if (vcpu->arch.nmi_pending)
4466 kvm_x86_ops->enable_nmi_window(vcpu);
4467 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
4468 kvm_x86_ops->enable_irq_window(vcpu);
4469
4470 if (kvm_lapic_enabled(vcpu)) {
4471 update_cr8_intercept(vcpu);
4472 kvm_lapic_sync_to_vapic(vcpu);
4473 }
4474
4475 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4476
4477 kvm_guest_enter();
4478
4479 if (unlikely(vcpu->arch.switch_db_regs)) {
4480 set_debugreg(0, 7);
4481 set_debugreg(vcpu->arch.eff_db[0], 0);
4482 set_debugreg(vcpu->arch.eff_db[1], 1);
4483 set_debugreg(vcpu->arch.eff_db[2], 2);
4484 set_debugreg(vcpu->arch.eff_db[3], 3);
4485 }
4486
4487 trace_kvm_entry(vcpu->vcpu_id);
4488 kvm_x86_ops->run(vcpu);
4489
4490 /*
4491 * If the guest has used debug registers, at least dr7
4492 * will be disabled while returning to the host.
4493 * If we don't have active breakpoints in the host, we don't
4494 * care about the messed up debug address registers. But if
4495 * we have some of them active, restore the old state.
4496 */
4497 if (hw_breakpoint_active())
4498 hw_breakpoint_restore();
4499
4500 set_bit(KVM_REQ_KICK, &vcpu->requests);
4501 local_irq_enable();
4502
4503 ++vcpu->stat.exits;
4504
4505 /*
4506 * We must have an instruction between local_irq_enable() and
4507 * kvm_guest_exit(), so the timer interrupt isn't delayed by
4508 * the interrupt shadow. The stat.exits increment will do nicely.
4509 * But we need to prevent reordering, hence this barrier():
4510 */
4511 barrier();
4512
4513 kvm_guest_exit();
4514
4515 preempt_enable();
4516
4517 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4518
4519 /*
4520 * Profile KVM exit RIPs:
4521 */
4522 if (unlikely(prof_on == KVM_PROFILING)) {
4523 unsigned long rip = kvm_rip_read(vcpu);
4524 profile_hit(KVM_PROFILING, (void *)rip);
4525 }
4526
4527
4528 kvm_lapic_sync_from_vapic(vcpu);
4529
4530 r = kvm_x86_ops->handle_exit(vcpu);
4531 out:
4532 return r;
4533 }
4534
4535
4536 static int __vcpu_run(struct kvm_vcpu *vcpu)
4537 {
4538 int r;
4539 struct kvm *kvm = vcpu->kvm;
4540
4541 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
4542 pr_debug("vcpu %d received sipi with vector # %x\n",
4543 vcpu->vcpu_id, vcpu->arch.sipi_vector);
4544 kvm_lapic_reset(vcpu);
4545 r = kvm_arch_vcpu_reset(vcpu);
4546 if (r)
4547 return r;
4548 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
4549 }
4550
4551 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4552 vapic_enter(vcpu);
4553
4554 r = 1;
4555 while (r > 0) {
4556 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
4557 r = vcpu_enter_guest(vcpu);
4558 else {
4559 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4560 kvm_vcpu_block(vcpu);
4561 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4562 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
4563 {
4564 switch(vcpu->arch.mp_state) {
4565 case KVM_MP_STATE_HALTED:
4566 vcpu->arch.mp_state =
4567 KVM_MP_STATE_RUNNABLE;
4568 case KVM_MP_STATE_RUNNABLE:
4569 break;
4570 case KVM_MP_STATE_SIPI_RECEIVED:
4571 default:
4572 r = -EINTR;
4573 break;
4574 }
4575 }
4576 }
4577
4578 if (r <= 0)
4579 break;
4580
4581 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
4582 if (kvm_cpu_has_pending_timer(vcpu))
4583 kvm_inject_pending_timer_irqs(vcpu);
4584
4585 if (dm_request_for_irq_injection(vcpu)) {
4586 r = -EINTR;
4587 vcpu->run->exit_reason = KVM_EXIT_INTR;
4588 ++vcpu->stat.request_irq_exits;
4589 }
4590 if (signal_pending(current)) {
4591 r = -EINTR;
4592 vcpu->run->exit_reason = KVM_EXIT_INTR;
4593 ++vcpu->stat.signal_exits;
4594 }
4595 if (need_resched()) {
4596 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4597 kvm_resched(vcpu);
4598 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4599 }
4600 }
4601
4602 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4603 post_kvm_run_save(vcpu);
4604
4605 vapic_exit(vcpu);
4606
4607 return r;
4608 }
4609
4610 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4611 {
4612 int r;
4613 sigset_t sigsaved;
4614
4615 vcpu_load(vcpu);
4616
4617 if (vcpu->sigset_active)
4618 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
4619
4620 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
4621 kvm_vcpu_block(vcpu);
4622 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
4623 r = -EAGAIN;
4624 goto out;
4625 }
4626
4627 /* re-sync apic's tpr */
4628 if (!irqchip_in_kernel(vcpu->kvm))
4629 kvm_set_cr8(vcpu, kvm_run->cr8);
4630
4631 if (vcpu->arch.pio.count || vcpu->mmio_needed ||
4632 vcpu->arch.emulate_ctxt.restart) {
4633 if (vcpu->mmio_needed) {
4634 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
4635 vcpu->mmio_read_completed = 1;
4636 vcpu->mmio_needed = 0;
4637 }
4638 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4639 r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE);
4640 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4641 if (r == EMULATE_DO_MMIO) {
4642 r = 0;
4643 goto out;
4644 }
4645 }
4646 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL)
4647 kvm_register_write(vcpu, VCPU_REGS_RAX,
4648 kvm_run->hypercall.ret);
4649
4650 r = __vcpu_run(vcpu);
4651
4652 out:
4653 if (vcpu->sigset_active)
4654 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
4655
4656 vcpu_put(vcpu);
4657 return r;
4658 }
4659
4660 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
4661 {
4662 vcpu_load(vcpu);
4663
4664 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
4665 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
4666 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
4667 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
4668 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
4669 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
4670 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
4671 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
4672 #ifdef CONFIG_X86_64
4673 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
4674 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
4675 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
4676 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
4677 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
4678 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
4679 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
4680 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
4681 #endif
4682
4683 regs->rip = kvm_rip_read(vcpu);
4684 regs->rflags = kvm_get_rflags(vcpu);
4685
4686 vcpu_put(vcpu);
4687
4688 return 0;
4689 }
4690
4691 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
4692 {
4693 vcpu_load(vcpu);
4694
4695 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
4696 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
4697 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
4698 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
4699 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
4700 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
4701 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
4702 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
4703 #ifdef CONFIG_X86_64
4704 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
4705 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
4706 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
4707 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
4708 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
4709 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
4710 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
4711 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
4712 #endif
4713
4714 kvm_rip_write(vcpu, regs->rip);
4715 kvm_set_rflags(vcpu, regs->rflags);
4716
4717 vcpu->arch.exception.pending = false;
4718
4719 vcpu_put(vcpu);
4720
4721 return 0;
4722 }
4723
4724 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
4725 {
4726 struct kvm_segment cs;
4727
4728 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
4729 *db = cs.db;
4730 *l = cs.l;
4731 }
4732 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
4733
4734 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
4735 struct kvm_sregs *sregs)
4736 {
4737 struct desc_ptr dt;
4738
4739 vcpu_load(vcpu);
4740
4741 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
4742 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
4743 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
4744 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
4745 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
4746 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
4747
4748 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
4749 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
4750
4751 kvm_x86_ops->get_idt(vcpu, &dt);
4752 sregs->idt.limit = dt.size;
4753 sregs->idt.base = dt.address;
4754 kvm_x86_ops->get_gdt(vcpu, &dt);
4755 sregs->gdt.limit = dt.size;
4756 sregs->gdt.base = dt.address;
4757
4758 sregs->cr0 = kvm_read_cr0(vcpu);
4759 sregs->cr2 = vcpu->arch.cr2;
4760 sregs->cr3 = vcpu->arch.cr3;
4761 sregs->cr4 = kvm_read_cr4(vcpu);
4762 sregs->cr8 = kvm_get_cr8(vcpu);
4763 sregs->efer = vcpu->arch.efer;
4764 sregs->apic_base = kvm_get_apic_base(vcpu);
4765
4766 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
4767
4768 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
4769 set_bit(vcpu->arch.interrupt.nr,
4770 (unsigned long *)sregs->interrupt_bitmap);
4771
4772 vcpu_put(vcpu);
4773
4774 return 0;
4775 }
4776
4777 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
4778 struct kvm_mp_state *mp_state)
4779 {
4780 vcpu_load(vcpu);
4781 mp_state->mp_state = vcpu->arch.mp_state;
4782 vcpu_put(vcpu);
4783 return 0;
4784 }
4785
4786 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
4787 struct kvm_mp_state *mp_state)
4788 {
4789 vcpu_load(vcpu);
4790 vcpu->arch.mp_state = mp_state->mp_state;
4791 vcpu_put(vcpu);
4792 return 0;
4793 }
4794
4795 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason)
4796 {
4797 int cs_db, cs_l, ret;
4798 cache_all_regs(vcpu);
4799
4800 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4801
4802 vcpu->arch.emulate_ctxt.vcpu = vcpu;
4803 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
4804 vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
4805 vcpu->arch.emulate_ctxt.mode =
4806 (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
4807 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
4808 ? X86EMUL_MODE_VM86 : cs_l
4809 ? X86EMUL_MODE_PROT64 : cs_db
4810 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
4811
4812 ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops,
4813 tss_selector, reason);
4814
4815 if (ret == X86EMUL_CONTINUE)
4816 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
4817
4818 return (ret != X86EMUL_CONTINUE);
4819 }
4820 EXPORT_SYMBOL_GPL(kvm_task_switch);
4821
4822 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
4823 struct kvm_sregs *sregs)
4824 {
4825 int mmu_reset_needed = 0;
4826 int pending_vec, max_bits;
4827 struct desc_ptr dt;
4828
4829 vcpu_load(vcpu);
4830
4831 dt.size = sregs->idt.limit;
4832 dt.address = sregs->idt.base;
4833 kvm_x86_ops->set_idt(vcpu, &dt);
4834 dt.size = sregs->gdt.limit;
4835 dt.address = sregs->gdt.base;
4836 kvm_x86_ops->set_gdt(vcpu, &dt);
4837
4838 vcpu->arch.cr2 = sregs->cr2;
4839 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
4840 vcpu->arch.cr3 = sregs->cr3;
4841
4842 kvm_set_cr8(vcpu, sregs->cr8);
4843
4844 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
4845 kvm_x86_ops->set_efer(vcpu, sregs->efer);
4846 kvm_set_apic_base(vcpu, sregs->apic_base);
4847
4848 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
4849 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
4850 vcpu->arch.cr0 = sregs->cr0;
4851
4852 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
4853 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
4854 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
4855 load_pdptrs(vcpu, vcpu->arch.cr3);
4856 mmu_reset_needed = 1;
4857 }
4858
4859 if (mmu_reset_needed)
4860 kvm_mmu_reset_context(vcpu);
4861
4862 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
4863 pending_vec = find_first_bit(
4864 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
4865 if (pending_vec < max_bits) {
4866 kvm_queue_interrupt(vcpu, pending_vec, false);
4867 pr_debug("Set back pending irq %d\n", pending_vec);
4868 if (irqchip_in_kernel(vcpu->kvm))
4869 kvm_pic_clear_isr_ack(vcpu->kvm);
4870 }
4871
4872 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
4873 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
4874 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
4875 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
4876 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
4877 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
4878
4879 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
4880 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
4881
4882 update_cr8_intercept(vcpu);
4883
4884 /* Older userspace won't unhalt the vcpu on reset. */
4885 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
4886 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
4887 !is_protmode(vcpu))
4888 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
4889
4890 vcpu_put(vcpu);
4891
4892 return 0;
4893 }
4894
4895 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
4896 struct kvm_guest_debug *dbg)
4897 {
4898 unsigned long rflags;
4899 int i, r;
4900
4901 vcpu_load(vcpu);
4902
4903 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
4904 r = -EBUSY;
4905 if (vcpu->arch.exception.pending)
4906 goto unlock_out;
4907 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
4908 kvm_queue_exception(vcpu, DB_VECTOR);
4909 else
4910 kvm_queue_exception(vcpu, BP_VECTOR);
4911 }
4912
4913 /*
4914 * Read rflags as long as potentially injected trace flags are still
4915 * filtered out.
4916 */
4917 rflags = kvm_get_rflags(vcpu);
4918
4919 vcpu->guest_debug = dbg->control;
4920 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
4921 vcpu->guest_debug = 0;
4922
4923 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
4924 for (i = 0; i < KVM_NR_DB_REGS; ++i)
4925 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
4926 vcpu->arch.switch_db_regs =
4927 (dbg->arch.debugreg[7] & DR7_BP_EN_MASK);
4928 } else {
4929 for (i = 0; i < KVM_NR_DB_REGS; i++)
4930 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
4931 vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
4932 }
4933
4934 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
4935 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
4936 get_segment_base(vcpu, VCPU_SREG_CS);
4937
4938 /*
4939 * Trigger an rflags update that will inject or remove the trace
4940 * flags.
4941 */
4942 kvm_set_rflags(vcpu, rflags);
4943
4944 kvm_x86_ops->set_guest_debug(vcpu, dbg);
4945
4946 r = 0;
4947
4948 unlock_out:
4949 vcpu_put(vcpu);
4950
4951 return r;
4952 }
4953
4954 /*
4955 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
4956 * we have asm/x86/processor.h
4957 */
4958 struct fxsave {
4959 u16 cwd;
4960 u16 swd;
4961 u16 twd;
4962 u16 fop;
4963 u64 rip;
4964 u64 rdp;
4965 u32 mxcsr;
4966 u32 mxcsr_mask;
4967 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
4968 #ifdef CONFIG_X86_64
4969 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
4970 #else
4971 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
4972 #endif
4973 };
4974
4975 /*
4976 * Translate a guest virtual address to a guest physical address.
4977 */
4978 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
4979 struct kvm_translation *tr)
4980 {
4981 unsigned long vaddr = tr->linear_address;
4982 gpa_t gpa;
4983 int idx;
4984
4985 vcpu_load(vcpu);
4986 idx = srcu_read_lock(&vcpu->kvm->srcu);
4987 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
4988 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4989 tr->physical_address = gpa;
4990 tr->valid = gpa != UNMAPPED_GVA;
4991 tr->writeable = 1;
4992 tr->usermode = 0;
4993 vcpu_put(vcpu);
4994
4995 return 0;
4996 }
4997
4998 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
4999 {
5000 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
5001
5002 vcpu_load(vcpu);
5003
5004 memcpy(fpu->fpr, fxsave->st_space, 128);
5005 fpu->fcw = fxsave->cwd;
5006 fpu->fsw = fxsave->swd;
5007 fpu->ftwx = fxsave->twd;
5008 fpu->last_opcode = fxsave->fop;
5009 fpu->last_ip = fxsave->rip;
5010 fpu->last_dp = fxsave->rdp;
5011 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
5012
5013 vcpu_put(vcpu);
5014
5015 return 0;
5016 }
5017
5018 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5019 {
5020 struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image;
5021
5022 vcpu_load(vcpu);
5023
5024 memcpy(fxsave->st_space, fpu->fpr, 128);
5025 fxsave->cwd = fpu->fcw;
5026 fxsave->swd = fpu->fsw;
5027 fxsave->twd = fpu->ftwx;
5028 fxsave->fop = fpu->last_opcode;
5029 fxsave->rip = fpu->last_ip;
5030 fxsave->rdp = fpu->last_dp;
5031 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
5032
5033 vcpu_put(vcpu);
5034
5035 return 0;
5036 }
5037
5038 void fx_init(struct kvm_vcpu *vcpu)
5039 {
5040 unsigned after_mxcsr_mask;
5041
5042 /*
5043 * Touch the fpu the first time in non atomic context as if
5044 * this is the first fpu instruction the exception handler
5045 * will fire before the instruction returns and it'll have to
5046 * allocate ram with GFP_KERNEL.
5047 */
5048 if (!used_math())
5049 kvm_fx_save(&vcpu->arch.host_fx_image);
5050
5051 /* Initialize guest FPU by resetting ours and saving into guest's */
5052 preempt_disable();
5053 kvm_fx_save(&vcpu->arch.host_fx_image);
5054 kvm_fx_finit();
5055 kvm_fx_save(&vcpu->arch.guest_fx_image);
5056 kvm_fx_restore(&vcpu->arch.host_fx_image);
5057 preempt_enable();
5058
5059 vcpu->arch.cr0 |= X86_CR0_ET;
5060 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
5061 vcpu->arch.guest_fx_image.mxcsr = 0x1f80;
5062 memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask,
5063 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
5064 }
5065 EXPORT_SYMBOL_GPL(fx_init);
5066
5067 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
5068 {
5069 if (vcpu->guest_fpu_loaded)
5070 return;
5071
5072 vcpu->guest_fpu_loaded = 1;
5073 kvm_fx_save(&vcpu->arch.host_fx_image);
5074 kvm_fx_restore(&vcpu->arch.guest_fx_image);
5075 trace_kvm_fpu(1);
5076 }
5077
5078 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
5079 {
5080 if (!vcpu->guest_fpu_loaded)
5081 return;
5082
5083 vcpu->guest_fpu_loaded = 0;
5084 kvm_fx_save(&vcpu->arch.guest_fx_image);
5085 kvm_fx_restore(&vcpu->arch.host_fx_image);
5086 ++vcpu->stat.fpu_reload;
5087 set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
5088 trace_kvm_fpu(0);
5089 }
5090
5091 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
5092 {
5093 if (vcpu->arch.time_page) {
5094 kvm_release_page_dirty(vcpu->arch.time_page);
5095 vcpu->arch.time_page = NULL;
5096 }
5097
5098 kvm_x86_ops->vcpu_free(vcpu);
5099 }
5100
5101 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
5102 unsigned int id)
5103 {
5104 return kvm_x86_ops->vcpu_create(kvm, id);
5105 }
5106
5107 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
5108 {
5109 int r;
5110
5111 /* We do fxsave: this must be aligned. */
5112 BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF);
5113
5114 vcpu->arch.mtrr_state.have_fixed = 1;
5115 vcpu_load(vcpu);
5116 r = kvm_arch_vcpu_reset(vcpu);
5117 if (r == 0)
5118 r = kvm_mmu_setup(vcpu);
5119 vcpu_put(vcpu);
5120 if (r < 0)
5121 goto free_vcpu;
5122
5123 return 0;
5124 free_vcpu:
5125 kvm_x86_ops->vcpu_free(vcpu);
5126 return r;
5127 }
5128
5129 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
5130 {
5131 vcpu_load(vcpu);
5132 kvm_mmu_unload(vcpu);
5133 vcpu_put(vcpu);
5134
5135 kvm_x86_ops->vcpu_free(vcpu);
5136 }
5137
5138 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
5139 {
5140 vcpu->arch.nmi_pending = false;
5141 vcpu->arch.nmi_injected = false;
5142
5143 vcpu->arch.switch_db_regs = 0;
5144 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
5145 vcpu->arch.dr6 = DR6_FIXED_1;
5146 vcpu->arch.dr7 = DR7_FIXED_1;
5147
5148 return kvm_x86_ops->vcpu_reset(vcpu);
5149 }
5150
5151 int kvm_arch_hardware_enable(void *garbage)
5152 {
5153 /*
5154 * Since this may be called from a hotplug notifcation,
5155 * we can't get the CPU frequency directly.
5156 */
5157 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
5158 int cpu = raw_smp_processor_id();
5159 per_cpu(cpu_tsc_khz, cpu) = 0;
5160 }
5161
5162 kvm_shared_msr_cpu_online();
5163
5164 return kvm_x86_ops->hardware_enable(garbage);
5165 }
5166
5167 void kvm_arch_hardware_disable(void *garbage)
5168 {
5169 kvm_x86_ops->hardware_disable(garbage);
5170 drop_user_return_notifiers(garbage);
5171 }
5172
5173 int kvm_arch_hardware_setup(void)
5174 {
5175 return kvm_x86_ops->hardware_setup();
5176 }
5177
5178 void kvm_arch_hardware_unsetup(void)
5179 {
5180 kvm_x86_ops->hardware_unsetup();
5181 }
5182
5183 void kvm_arch_check_processor_compat(void *rtn)
5184 {
5185 kvm_x86_ops->check_processor_compatibility(rtn);
5186 }
5187
5188 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
5189 {
5190 struct page *page;
5191 struct kvm *kvm;
5192 int r;
5193
5194 BUG_ON(vcpu->kvm == NULL);
5195 kvm = vcpu->kvm;
5196
5197 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
5198 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
5199 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5200 else
5201 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
5202
5203 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
5204 if (!page) {
5205 r = -ENOMEM;
5206 goto fail;
5207 }
5208 vcpu->arch.pio_data = page_address(page);
5209
5210 r = kvm_mmu_create(vcpu);
5211 if (r < 0)
5212 goto fail_free_pio_data;
5213
5214 if (irqchip_in_kernel(kvm)) {
5215 r = kvm_create_lapic(vcpu);
5216 if (r < 0)
5217 goto fail_mmu_destroy;
5218 }
5219
5220 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
5221 GFP_KERNEL);
5222 if (!vcpu->arch.mce_banks) {
5223 r = -ENOMEM;
5224 goto fail_free_lapic;
5225 }
5226 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
5227
5228 return 0;
5229 fail_free_lapic:
5230 kvm_free_lapic(vcpu);
5231 fail_mmu_destroy:
5232 kvm_mmu_destroy(vcpu);
5233 fail_free_pio_data:
5234 free_page((unsigned long)vcpu->arch.pio_data);
5235 fail:
5236 return r;
5237 }
5238
5239 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
5240 {
5241 int idx;
5242
5243 kfree(vcpu->arch.mce_banks);
5244 kvm_free_lapic(vcpu);
5245 idx = srcu_read_lock(&vcpu->kvm->srcu);
5246 kvm_mmu_destroy(vcpu);
5247 srcu_read_unlock(&vcpu->kvm->srcu, idx);
5248 free_page((unsigned long)vcpu->arch.pio_data);
5249 }
5250
5251 struct kvm *kvm_arch_create_vm(void)
5252 {
5253 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
5254
5255 if (!kvm)
5256 return ERR_PTR(-ENOMEM);
5257
5258 kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
5259 if (!kvm->arch.aliases) {
5260 kfree(kvm);
5261 return ERR_PTR(-ENOMEM);
5262 }
5263
5264 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
5265 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
5266
5267 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
5268 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
5269
5270 rdtscll(kvm->arch.vm_init_tsc);
5271
5272 return kvm;
5273 }
5274
5275 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
5276 {
5277 vcpu_load(vcpu);
5278 kvm_mmu_unload(vcpu);
5279 vcpu_put(vcpu);
5280 }
5281
5282 static void kvm_free_vcpus(struct kvm *kvm)
5283 {
5284 unsigned int i;
5285 struct kvm_vcpu *vcpu;
5286
5287 /*
5288 * Unpin any mmu pages first.
5289 */
5290 kvm_for_each_vcpu(i, vcpu, kvm)
5291 kvm_unload_vcpu_mmu(vcpu);
5292 kvm_for_each_vcpu(i, vcpu, kvm)
5293 kvm_arch_vcpu_free(vcpu);
5294
5295 mutex_lock(&kvm->lock);
5296 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
5297 kvm->vcpus[i] = NULL;
5298
5299 atomic_set(&kvm->online_vcpus, 0);
5300 mutex_unlock(&kvm->lock);
5301 }
5302
5303 void kvm_arch_sync_events(struct kvm *kvm)
5304 {
5305 kvm_free_all_assigned_devices(kvm);
5306 }
5307
5308 void kvm_arch_destroy_vm(struct kvm *kvm)
5309 {
5310 kvm_iommu_unmap_guest(kvm);
5311 kvm_free_pit(kvm);
5312 kfree(kvm->arch.vpic);
5313 kfree(kvm->arch.vioapic);
5314 kvm_free_vcpus(kvm);
5315 kvm_free_physmem(kvm);
5316 if (kvm->arch.apic_access_page)
5317 put_page(kvm->arch.apic_access_page);
5318 if (kvm->arch.ept_identity_pagetable)
5319 put_page(kvm->arch.ept_identity_pagetable);
5320 cleanup_srcu_struct(&kvm->srcu);
5321 kfree(kvm->arch.aliases);
5322 kfree(kvm);
5323 }
5324
5325 int kvm_arch_prepare_memory_region(struct kvm *kvm,
5326 struct kvm_memory_slot *memslot,
5327 struct kvm_memory_slot old,
5328 struct kvm_userspace_memory_region *mem,
5329 int user_alloc)
5330 {
5331 int npages = memslot->npages;
5332
5333 /*To keep backward compatibility with older userspace,
5334 *x86 needs to hanlde !user_alloc case.
5335 */
5336 if (!user_alloc) {
5337 if (npages && !old.rmap) {
5338 unsigned long userspace_addr;
5339
5340 down_write(&current->mm->mmap_sem);
5341 userspace_addr = do_mmap(NULL, 0,
5342 npages * PAGE_SIZE,
5343 PROT_READ | PROT_WRITE,
5344 MAP_PRIVATE | MAP_ANONYMOUS,
5345 0);
5346 up_write(&current->mm->mmap_sem);
5347
5348 if (IS_ERR((void *)userspace_addr))
5349 return PTR_ERR((void *)userspace_addr);
5350
5351 memslot->userspace_addr = userspace_addr;
5352 }
5353 }
5354
5355
5356 return 0;
5357 }
5358
5359 void kvm_arch_commit_memory_region(struct kvm *kvm,
5360 struct kvm_userspace_memory_region *mem,
5361 struct kvm_memory_slot old,
5362 int user_alloc)
5363 {
5364
5365 int npages = mem->memory_size >> PAGE_SHIFT;
5366
5367 if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
5368 int ret;
5369
5370 down_write(&current->mm->mmap_sem);
5371 ret = do_munmap(current->mm, old.userspace_addr,
5372 old.npages * PAGE_SIZE);
5373 up_write(&current->mm->mmap_sem);
5374 if (ret < 0)
5375 printk(KERN_WARNING
5376 "kvm_vm_ioctl_set_memory_region: "
5377 "failed to munmap memory\n");
5378 }
5379
5380 spin_lock(&kvm->mmu_lock);
5381 if (!kvm->arch.n_requested_mmu_pages) {
5382 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
5383 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
5384 }
5385
5386 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
5387 spin_unlock(&kvm->mmu_lock);
5388 }
5389
5390 void kvm_arch_flush_shadow(struct kvm *kvm)
5391 {
5392 kvm_mmu_zap_all(kvm);
5393 kvm_reload_remote_mmus(kvm);
5394 }
5395
5396 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
5397 {
5398 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE
5399 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
5400 || vcpu->arch.nmi_pending ||
5401 (kvm_arch_interrupt_allowed(vcpu) &&
5402 kvm_cpu_has_interrupt(vcpu));
5403 }
5404
5405 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
5406 {
5407 int me;
5408 int cpu = vcpu->cpu;
5409
5410 if (waitqueue_active(&vcpu->wq)) {
5411 wake_up_interruptible(&vcpu->wq);
5412 ++vcpu->stat.halt_wakeup;
5413 }
5414
5415 me = get_cpu();
5416 if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
5417 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
5418 smp_send_reschedule(cpu);
5419 put_cpu();
5420 }
5421
5422 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
5423 {
5424 return kvm_x86_ops->interrupt_allowed(vcpu);
5425 }
5426
5427 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
5428 {
5429 unsigned long current_rip = kvm_rip_read(vcpu) +
5430 get_segment_base(vcpu, VCPU_SREG_CS);
5431
5432 return current_rip == linear_rip;
5433 }
5434 EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
5435
5436 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
5437 {
5438 unsigned long rflags;
5439
5440 rflags = kvm_x86_ops->get_rflags(vcpu);
5441 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5442 rflags &= ~X86_EFLAGS_TF;
5443 return rflags;
5444 }
5445 EXPORT_SYMBOL_GPL(kvm_get_rflags);
5446
5447 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
5448 {
5449 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
5450 kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
5451 rflags |= X86_EFLAGS_TF;
5452 kvm_x86_ops->set_rflags(vcpu, rflags);
5453 }
5454 EXPORT_SYMBOL_GPL(kvm_set_rflags);
5455
5456 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
5457 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
5458 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
5459 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
5460 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
5461 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
5462 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
5463 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
5464 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
5465 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
5466 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
5467 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);
Linux kernel - Deliverables
This page took 0.199053 seconds and 6 git commands to generate.