2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
7 * Copyright (C) 2008 Qumranet, Inc.
8 * Copyright IBM Corporation, 2008
9 * Copyright 2010 Red Hat, Inc. and/or its affilates.
12 * Avi Kivity <avi@qumranet.com>
13 * Yaniv Kamay <yaniv@qumranet.com>
14 * Amit Shah <amit.shah@qumranet.com>
15 * Ben-Ami Yassour <benami@il.ibm.com>
17 * This work is licensed under the terms of the GNU GPL, version 2. See
18 * the COPYING file in the top-level directory.
22 #include <linux/kvm_host.h>
27 #include "kvm_cache_regs.h"
30 #include <linux/clocksource.h>
31 #include <linux/interrupt.h>
32 #include <linux/kvm.h>
34 #include <linux/vmalloc.h>
35 #include <linux/module.h>
36 #include <linux/mman.h>
37 #include <linux/highmem.h>
38 #include <linux/iommu.h>
39 #include <linux/intel-iommu.h>
40 #include <linux/cpufreq.h>
41 #include <linux/user-return-notifier.h>
42 #include <linux/srcu.h>
43 #include <linux/slab.h>
44 #include <linux/perf_event.h>
45 #include <linux/uaccess.h>
46 #include <trace/events/kvm.h>
48 #define CREATE_TRACE_POINTS
51 #include <asm/debugreg.h>
59 #define MAX_IO_MSRS 256
60 #define CR0_RESERVED_BITS \
61 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
62 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
63 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
64 #define CR4_RESERVED_BITS \
65 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
66 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
67 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
69 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
71 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
73 #define KVM_MAX_MCE_BANKS 32
74 #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P
77 * - enable syscall per default because its emulated by KVM
78 * - enable LME and LMA per default on 64 bit KVM
81 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL;
83 static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL;
86 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
87 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
89 static void update_cr8_intercept(struct kvm_vcpu *vcpu);
90 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
91 struct kvm_cpuid_entry2 __user *entries);
93 struct kvm_x86_ops *kvm_x86_ops;
94 EXPORT_SYMBOL_GPL(kvm_x86_ops);
97 module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR);
99 #define KVM_NR_SHARED_MSRS 16
101 struct kvm_shared_msrs_global {
103 u32 msrs[KVM_NR_SHARED_MSRS];
106 struct kvm_shared_msrs {
107 struct user_return_notifier urn;
109 struct kvm_shared_msr_values {
112 } values[KVM_NR_SHARED_MSRS];
115 static struct kvm_shared_msrs_global __read_mostly shared_msrs_global;
116 static DEFINE_PER_CPU(struct kvm_shared_msrs, shared_msrs);
118 struct kvm_stats_debugfs_item debugfs_entries[] = {
119 { "pf_fixed", VCPU_STAT(pf_fixed) },
120 { "pf_guest", VCPU_STAT(pf_guest) },
121 { "tlb_flush", VCPU_STAT(tlb_flush) },
122 { "invlpg", VCPU_STAT(invlpg) },
123 { "exits", VCPU_STAT(exits) },
124 { "io_exits", VCPU_STAT(io_exits) },
125 { "mmio_exits", VCPU_STAT(mmio_exits) },
126 { "signal_exits", VCPU_STAT(signal_exits) },
127 { "irq_window", VCPU_STAT(irq_window_exits) },
128 { "nmi_window", VCPU_STAT(nmi_window_exits) },
129 { "halt_exits", VCPU_STAT(halt_exits) },
130 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
131 { "hypercalls", VCPU_STAT(hypercalls) },
132 { "request_irq", VCPU_STAT(request_irq_exits) },
133 { "irq_exits", VCPU_STAT(irq_exits) },
134 { "host_state_reload", VCPU_STAT(host_state_reload) },
135 { "efer_reload", VCPU_STAT(efer_reload) },
136 { "fpu_reload", VCPU_STAT(fpu_reload) },
137 { "insn_emulation", VCPU_STAT(insn_emulation) },
138 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
139 { "irq_injections", VCPU_STAT(irq_injections) },
140 { "nmi_injections", VCPU_STAT(nmi_injections) },
141 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
142 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
143 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
144 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
145 { "mmu_flooded", VM_STAT(mmu_flooded) },
146 { "mmu_recycled", VM_STAT(mmu_recycled) },
147 { "mmu_cache_miss", VM_STAT(mmu_cache_miss) },
148 { "mmu_unsync", VM_STAT(mmu_unsync) },
149 { "remote_tlb_flush", VM_STAT(remote_tlb_flush) },
150 { "largepages", VM_STAT(lpages) },
154 u64 __read_mostly host_xcr0;
156 static inline u32 bit(int bitno)
158 return 1 << (bitno & 31);
161 static void kvm_on_user_return(struct user_return_notifier *urn)
164 struct kvm_shared_msrs *locals
165 = container_of(urn, struct kvm_shared_msrs, urn);
166 struct kvm_shared_msr_values *values;
168 for (slot = 0; slot < shared_msrs_global.nr; ++slot) {
169 values = &locals->values[slot];
170 if (values->host != values->curr) {
171 wrmsrl(shared_msrs_global.msrs[slot], values->host);
172 values->curr = values->host;
175 locals->registered = false;
176 user_return_notifier_unregister(urn);
179 static void shared_msr_update(unsigned slot, u32 msr)
181 struct kvm_shared_msrs *smsr;
184 smsr = &__get_cpu_var(shared_msrs);
185 /* only read, and nobody should modify it at this time,
186 * so don't need lock */
187 if (slot >= shared_msrs_global.nr) {
188 printk(KERN_ERR "kvm: invalid MSR slot!");
191 rdmsrl_safe(msr, &value);
192 smsr->values[slot].host = value;
193 smsr->values[slot].curr = value;
196 void kvm_define_shared_msr(unsigned slot, u32 msr)
198 if (slot >= shared_msrs_global.nr)
199 shared_msrs_global.nr = slot + 1;
200 shared_msrs_global.msrs[slot] = msr;
201 /* we need ensured the shared_msr_global have been updated */
204 EXPORT_SYMBOL_GPL(kvm_define_shared_msr);
206 static void kvm_shared_msr_cpu_online(void)
210 for (i = 0; i < shared_msrs_global.nr; ++i)
211 shared_msr_update(i, shared_msrs_global.msrs[i]);
214 void kvm_set_shared_msr(unsigned slot, u64 value, u64 mask)
216 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
218 if (((value ^ smsr->values[slot].curr) & mask) == 0)
220 smsr->values[slot].curr = value;
221 wrmsrl(shared_msrs_global.msrs[slot], value);
222 if (!smsr->registered) {
223 smsr->urn.on_user_return = kvm_on_user_return;
224 user_return_notifier_register(&smsr->urn);
225 smsr->registered = true;
228 EXPORT_SYMBOL_GPL(kvm_set_shared_msr);
230 static void drop_user_return_notifiers(void *ignore)
232 struct kvm_shared_msrs *smsr = &__get_cpu_var(shared_msrs);
234 if (smsr->registered)
235 kvm_on_user_return(&smsr->urn);
238 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
240 if (irqchip_in_kernel(vcpu->kvm))
241 return vcpu->arch.apic_base;
243 return vcpu->arch.apic_base;
245 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
247 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
249 /* TODO: reserve bits check */
250 if (irqchip_in_kernel(vcpu->kvm))
251 kvm_lapic_set_base(vcpu, data);
253 vcpu->arch.apic_base = data;
255 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
257 #define EXCPT_BENIGN 0
258 #define EXCPT_CONTRIBUTORY 1
261 static int exception_class(int vector)
271 return EXCPT_CONTRIBUTORY;
278 static void kvm_multiple_exception(struct kvm_vcpu *vcpu,
279 unsigned nr, bool has_error, u32 error_code,
285 if (!vcpu->arch.exception.pending) {
287 vcpu->arch.exception.pending = true;
288 vcpu->arch.exception.has_error_code = has_error;
289 vcpu->arch.exception.nr = nr;
290 vcpu->arch.exception.error_code = error_code;
291 vcpu->arch.exception.reinject = reinject;
295 /* to check exception */
296 prev_nr = vcpu->arch.exception.nr;
297 if (prev_nr == DF_VECTOR) {
298 /* triple fault -> shutdown */
299 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
302 class1 = exception_class(prev_nr);
303 class2 = exception_class(nr);
304 if ((class1 == EXCPT_CONTRIBUTORY && class2 == EXCPT_CONTRIBUTORY)
305 || (class1 == EXCPT_PF && class2 != EXCPT_BENIGN)) {
306 /* generate double fault per SDM Table 5-5 */
307 vcpu->arch.exception.pending = true;
308 vcpu->arch.exception.has_error_code = true;
309 vcpu->arch.exception.nr = DF_VECTOR;
310 vcpu->arch.exception.error_code = 0;
312 /* replace previous exception with a new one in a hope
313 that instruction re-execution will regenerate lost
318 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr)
320 kvm_multiple_exception(vcpu, nr, false, 0, false);
322 EXPORT_SYMBOL_GPL(kvm_queue_exception);
324 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr)
326 kvm_multiple_exception(vcpu, nr, false, 0, true);
328 EXPORT_SYMBOL_GPL(kvm_requeue_exception);
330 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr,
333 ++vcpu->stat.pf_guest;
334 vcpu->arch.cr2 = addr;
335 kvm_queue_exception_e(vcpu, PF_VECTOR, error_code);
338 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
340 vcpu->arch.nmi_pending = 1;
342 EXPORT_SYMBOL_GPL(kvm_inject_nmi);
344 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
346 kvm_multiple_exception(vcpu, nr, true, error_code, false);
348 EXPORT_SYMBOL_GPL(kvm_queue_exception_e);
350 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code)
352 kvm_multiple_exception(vcpu, nr, true, error_code, true);
354 EXPORT_SYMBOL_GPL(kvm_requeue_exception_e);
357 * Checks if cpl <= required_cpl; if true, return true. Otherwise queue
358 * a #GP and return false.
360 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl)
362 if (kvm_x86_ops->get_cpl(vcpu) <= required_cpl)
364 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
367 EXPORT_SYMBOL_GPL(kvm_require_cpl);
370 * Load the pae pdptrs. Return true is they are all valid.
372 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
374 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
375 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
378 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
380 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
381 offset * sizeof(u64), sizeof(pdpte));
386 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
387 if (is_present_gpte(pdpte[i]) &&
388 (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
395 memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs));
396 __set_bit(VCPU_EXREG_PDPTR,
397 (unsigned long *)&vcpu->arch.regs_avail);
398 __set_bit(VCPU_EXREG_PDPTR,
399 (unsigned long *)&vcpu->arch.regs_dirty);
404 EXPORT_SYMBOL_GPL(load_pdptrs);
406 static bool pdptrs_changed(struct kvm_vcpu *vcpu)
408 u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)];
412 if (is_long_mode(vcpu) || !is_pae(vcpu))
415 if (!test_bit(VCPU_EXREG_PDPTR,
416 (unsigned long *)&vcpu->arch.regs_avail))
419 r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte));
422 changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0;
428 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
430 unsigned long old_cr0 = kvm_read_cr0(vcpu);
431 unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
432 X86_CR0_CD | X86_CR0_NW;
437 if (cr0 & 0xffffffff00000000UL)
441 cr0 &= ~CR0_RESERVED_BITS;
443 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD))
446 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE))
449 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
451 if ((vcpu->arch.efer & EFER_LME)) {
456 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
461 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3))
465 kvm_x86_ops->set_cr0(vcpu, cr0);
467 if ((cr0 ^ old_cr0) & update_bits)
468 kvm_mmu_reset_context(vcpu);
471 EXPORT_SYMBOL_GPL(kvm_set_cr0);
473 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
475 (void)kvm_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~0x0eul) | (msw & 0x0f));
477 EXPORT_SYMBOL_GPL(kvm_lmsw);
479 int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
483 /* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now */
484 if (index != XCR_XFEATURE_ENABLED_MASK)
487 if (kvm_x86_ops->get_cpl(vcpu) != 0)
489 if (!(xcr0 & XSTATE_FP))
491 if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE))
493 if (xcr0 & ~host_xcr0)
495 vcpu->arch.xcr0 = xcr0;
496 vcpu->guest_xcr0_loaded = 0;
500 int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
502 if (__kvm_set_xcr(vcpu, index, xcr)) {
503 kvm_inject_gp(vcpu, 0);
508 EXPORT_SYMBOL_GPL(kvm_set_xcr);
510 static bool guest_cpuid_has_xsave(struct kvm_vcpu *vcpu)
512 struct kvm_cpuid_entry2 *best;
514 best = kvm_find_cpuid_entry(vcpu, 1, 0);
515 return best && (best->ecx & bit(X86_FEATURE_XSAVE));
518 static void update_cpuid(struct kvm_vcpu *vcpu)
520 struct kvm_cpuid_entry2 *best;
522 best = kvm_find_cpuid_entry(vcpu, 1, 0);
526 /* Update OSXSAVE bit */
527 if (cpu_has_xsave && best->function == 0x1) {
528 best->ecx &= ~(bit(X86_FEATURE_OSXSAVE));
529 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE))
530 best->ecx |= bit(X86_FEATURE_OSXSAVE);
534 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
536 unsigned long old_cr4 = kvm_read_cr4(vcpu);
537 unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE;
539 if (cr4 & CR4_RESERVED_BITS)
542 if (!guest_cpuid_has_xsave(vcpu) && (cr4 & X86_CR4_OSXSAVE))
545 if (is_long_mode(vcpu)) {
546 if (!(cr4 & X86_CR4_PAE))
548 } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE)
549 && ((cr4 ^ old_cr4) & pdptr_bits)
550 && !load_pdptrs(vcpu, vcpu->arch.cr3))
553 if (cr4 & X86_CR4_VMXE)
556 kvm_x86_ops->set_cr4(vcpu, cr4);
558 if ((cr4 ^ old_cr4) & pdptr_bits)
559 kvm_mmu_reset_context(vcpu);
561 if ((cr4 ^ old_cr4) & X86_CR4_OSXSAVE)
566 EXPORT_SYMBOL_GPL(kvm_set_cr4);
568 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
570 if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) {
571 kvm_mmu_sync_roots(vcpu);
572 kvm_mmu_flush_tlb(vcpu);
576 if (is_long_mode(vcpu)) {
577 if (cr3 & CR3_L_MODE_RESERVED_BITS)
581 if (cr3 & CR3_PAE_RESERVED_BITS)
583 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3))
587 * We don't check reserved bits in nonpae mode, because
588 * this isn't enforced, and VMware depends on this.
593 * Does the new cr3 value map to physical memory? (Note, we
594 * catch an invalid cr3 even in real-mode, because it would
595 * cause trouble later on when we turn on paging anyway.)
597 * A real CPU would silently accept an invalid cr3 and would
598 * attempt to use it - with largely undefined (and often hard
599 * to debug) behavior on the guest side.
601 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
603 vcpu->arch.cr3 = cr3;
604 vcpu->arch.mmu.new_cr3(vcpu);
607 EXPORT_SYMBOL_GPL(kvm_set_cr3);
609 int __kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
611 if (cr8 & CR8_RESERVED_BITS)
613 if (irqchip_in_kernel(vcpu->kvm))
614 kvm_lapic_set_tpr(vcpu, cr8);
616 vcpu->arch.cr8 = cr8;
620 void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
622 if (__kvm_set_cr8(vcpu, cr8))
623 kvm_inject_gp(vcpu, 0);
625 EXPORT_SYMBOL_GPL(kvm_set_cr8);
627 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu)
629 if (irqchip_in_kernel(vcpu->kvm))
630 return kvm_lapic_get_cr8(vcpu);
632 return vcpu->arch.cr8;
634 EXPORT_SYMBOL_GPL(kvm_get_cr8);
636 static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
640 vcpu->arch.db[dr] = val;
641 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
642 vcpu->arch.eff_db[dr] = val;
645 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
649 if (val & 0xffffffff00000000ULL)
651 vcpu->arch.dr6 = (val & DR6_VOLATILE) | DR6_FIXED_1;
654 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
658 if (val & 0xffffffff00000000ULL)
660 vcpu->arch.dr7 = (val & DR7_VOLATILE) | DR7_FIXED_1;
661 if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)) {
662 kvm_x86_ops->set_dr7(vcpu, vcpu->arch.dr7);
663 vcpu->arch.switch_db_regs = (val & DR7_BP_EN_MASK);
671 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
675 res = __kvm_set_dr(vcpu, dr, val);
677 kvm_queue_exception(vcpu, UD_VECTOR);
679 kvm_inject_gp(vcpu, 0);
683 EXPORT_SYMBOL_GPL(kvm_set_dr);
685 static int _kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
689 *val = vcpu->arch.db[dr];
692 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
696 *val = vcpu->arch.dr6;
699 if (kvm_read_cr4_bits(vcpu, X86_CR4_DE))
703 *val = vcpu->arch.dr7;
710 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
712 if (_kvm_get_dr(vcpu, dr, val)) {
713 kvm_queue_exception(vcpu, UD_VECTOR);
718 EXPORT_SYMBOL_GPL(kvm_get_dr);
721 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
722 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
724 * This list is modified at module load time to reflect the
725 * capabilities of the host cpu. This capabilities test skips MSRs that are
726 * kvm-specific. Those are put in the beginning of the list.
729 #define KVM_SAVE_MSRS_BEGIN 7
730 static u32 msrs_to_save[] = {
731 MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
732 MSR_KVM_SYSTEM_TIME_NEW, MSR_KVM_WALL_CLOCK_NEW,
733 HV_X64_MSR_GUEST_OS_ID, HV_X64_MSR_HYPERCALL,
734 HV_X64_MSR_APIC_ASSIST_PAGE,
735 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
738 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
740 MSR_IA32_TSC, MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA
743 static unsigned num_msrs_to_save;
745 static u32 emulated_msrs[] = {
746 MSR_IA32_MISC_ENABLE,
749 static int set_efer(struct kvm_vcpu *vcpu, u64 efer)
751 u64 old_efer = vcpu->arch.efer;
753 if (efer & efer_reserved_bits)
757 && (vcpu->arch.efer & EFER_LME) != (efer & EFER_LME))
760 if (efer & EFER_FFXSR) {
761 struct kvm_cpuid_entry2 *feat;
763 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
764 if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT)))
768 if (efer & EFER_SVME) {
769 struct kvm_cpuid_entry2 *feat;
771 feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
772 if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM)))
777 efer |= vcpu->arch.efer & EFER_LMA;
779 kvm_x86_ops->set_efer(vcpu, efer);
781 vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled;
782 kvm_mmu_reset_context(vcpu);
784 /* Update reserved bits */
785 if ((efer ^ old_efer) & EFER_NX)
786 kvm_mmu_reset_context(vcpu);
791 void kvm_enable_efer_bits(u64 mask)
793 efer_reserved_bits &= ~mask;
795 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits);
799 * Writes msr value into into the appropriate "register".
800 * Returns 0 on success, non-0 otherwise.
801 * Assumes vcpu_load() was already called.
803 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
805 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
809 * Adapt set_msr() to msr_io()'s calling convention
811 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
813 return kvm_set_msr(vcpu, index, *data);
816 static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
820 struct pvclock_wall_clock wc;
821 struct timespec boot;
826 r = kvm_read_guest(kvm, wall_clock, &version, sizeof(version));
831 ++version; /* first time write, random junk */
835 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
838 * The guest calculates current wall clock time by adding
839 * system time (updated by kvm_write_guest_time below) to the
840 * wall clock specified here. guest system time equals host
841 * system time for us, thus we must fill in host boot time here.
845 wc.sec = boot.tv_sec;
846 wc.nsec = boot.tv_nsec;
847 wc.version = version;
849 kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc));
852 kvm_write_guest(kvm, wall_clock, &version, sizeof(version));
855 static uint32_t div_frac(uint32_t dividend, uint32_t divisor)
857 uint32_t quotient, remainder;
859 /* Don't try to replace with do_div(), this one calculates
860 * "(dividend << 32) / divisor" */
862 : "=a" (quotient), "=d" (remainder)
863 : "0" (0), "1" (dividend), "r" (divisor) );
867 static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock)
869 uint64_t nsecs = 1000000000LL;
874 tps64 = tsc_khz * 1000LL;
875 while (tps64 > nsecs*2) {
880 tps32 = (uint32_t)tps64;
881 while (tps32 <= (uint32_t)nsecs) {
886 hv_clock->tsc_shift = shift;
887 hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32);
889 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
890 __func__, tsc_khz, hv_clock->tsc_shift,
891 hv_clock->tsc_to_system_mul);
894 static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz);
896 static void kvm_write_guest_time(struct kvm_vcpu *v)
900 struct kvm_vcpu_arch *vcpu = &v->arch;
902 unsigned long this_tsc_khz;
904 if ((!vcpu->time_page))
907 this_tsc_khz = get_cpu_var(cpu_tsc_khz);
908 if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) {
909 kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock);
910 vcpu->hv_clock_tsc_khz = this_tsc_khz;
912 put_cpu_var(cpu_tsc_khz);
914 /* Keep irq disabled to prevent changes to the clock */
915 local_irq_save(flags);
916 kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp);
918 monotonic_to_bootbased(&ts);
919 local_irq_restore(flags);
921 /* With all the info we got, fill in the values */
923 vcpu->hv_clock.system_time = ts.tv_nsec +
924 (NSEC_PER_SEC * (u64)ts.tv_sec) + v->kvm->arch.kvmclock_offset;
926 vcpu->hv_clock.flags = 0;
929 * The interface expects us to write an even number signaling that the
930 * update is finished. Since the guest won't see the intermediate
931 * state, we just increase by 2 at the end.
933 vcpu->hv_clock.version += 2;
935 shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0);
937 memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock,
938 sizeof(vcpu->hv_clock));
940 kunmap_atomic(shared_kaddr, KM_USER0);
942 mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT);
945 static int kvm_request_guest_time_update(struct kvm_vcpu *v)
947 struct kvm_vcpu_arch *vcpu = &v->arch;
949 if (!vcpu->time_page)
951 set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests);
955 static bool msr_mtrr_valid(unsigned msr)
958 case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1:
959 case MSR_MTRRfix64K_00000:
960 case MSR_MTRRfix16K_80000:
961 case MSR_MTRRfix16K_A0000:
962 case MSR_MTRRfix4K_C0000:
963 case MSR_MTRRfix4K_C8000:
964 case MSR_MTRRfix4K_D0000:
965 case MSR_MTRRfix4K_D8000:
966 case MSR_MTRRfix4K_E0000:
967 case MSR_MTRRfix4K_E8000:
968 case MSR_MTRRfix4K_F0000:
969 case MSR_MTRRfix4K_F8000:
970 case MSR_MTRRdefType:
971 case MSR_IA32_CR_PAT:
979 static bool valid_pat_type(unsigned t)
981 return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */
984 static bool valid_mtrr_type(unsigned t)
986 return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */
989 static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data)
993 if (!msr_mtrr_valid(msr))
996 if (msr == MSR_IA32_CR_PAT) {
997 for (i = 0; i < 8; i++)
998 if (!valid_pat_type((data >> (i * 8)) & 0xff))
1001 } else if (msr == MSR_MTRRdefType) {
1004 return valid_mtrr_type(data & 0xff);
1005 } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) {
1006 for (i = 0; i < 8 ; i++)
1007 if (!valid_mtrr_type((data >> (i * 8)) & 0xff))
1012 /* variable MTRRs */
1013 return valid_mtrr_type(data & 0xff);
1016 static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1018 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1020 if (!mtrr_valid(vcpu, msr, data))
1023 if (msr == MSR_MTRRdefType) {
1024 vcpu->arch.mtrr_state.def_type = data;
1025 vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10;
1026 } else if (msr == MSR_MTRRfix64K_00000)
1028 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1029 p[1 + msr - MSR_MTRRfix16K_80000] = data;
1030 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1031 p[3 + msr - MSR_MTRRfix4K_C0000] = data;
1032 else if (msr == MSR_IA32_CR_PAT)
1033 vcpu->arch.pat = data;
1034 else { /* Variable MTRRs */
1035 int idx, is_mtrr_mask;
1038 idx = (msr - 0x200) / 2;
1039 is_mtrr_mask = msr - 0x200 - 2 * idx;
1042 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1045 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1049 kvm_mmu_reset_context(vcpu);
1053 static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1055 u64 mcg_cap = vcpu->arch.mcg_cap;
1056 unsigned bank_num = mcg_cap & 0xff;
1059 case MSR_IA32_MCG_STATUS:
1060 vcpu->arch.mcg_status = data;
1062 case MSR_IA32_MCG_CTL:
1063 if (!(mcg_cap & MCG_CTL_P))
1065 if (data != 0 && data != ~(u64)0)
1067 vcpu->arch.mcg_ctl = data;
1070 if (msr >= MSR_IA32_MC0_CTL &&
1071 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1072 u32 offset = msr - MSR_IA32_MC0_CTL;
1073 /* only 0 or all 1s can be written to IA32_MCi_CTL
1074 * some Linux kernels though clear bit 10 in bank 4 to
1075 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
1076 * this to avoid an uncatched #GP in the guest
1078 if ((offset & 0x3) == 0 &&
1079 data != 0 && (data | (1 << 10)) != ~(u64)0)
1081 vcpu->arch.mce_banks[offset] = data;
1089 static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data)
1091 struct kvm *kvm = vcpu->kvm;
1092 int lm = is_long_mode(vcpu);
1093 u8 *blob_addr = lm ? (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_64
1094 : (u8 *)(long)kvm->arch.xen_hvm_config.blob_addr_32;
1095 u8 blob_size = lm ? kvm->arch.xen_hvm_config.blob_size_64
1096 : kvm->arch.xen_hvm_config.blob_size_32;
1097 u32 page_num = data & ~PAGE_MASK;
1098 u64 page_addr = data & PAGE_MASK;
1103 if (page_num >= blob_size)
1106 page = kzalloc(PAGE_SIZE, GFP_KERNEL);
1110 if (copy_from_user(page, blob_addr + (page_num * PAGE_SIZE), PAGE_SIZE))
1112 if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE))
1121 static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
1123 return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
1126 static bool kvm_hv_msr_partition_wide(u32 msr)
1130 case HV_X64_MSR_GUEST_OS_ID:
1131 case HV_X64_MSR_HYPERCALL:
1139 static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1141 struct kvm *kvm = vcpu->kvm;
1144 case HV_X64_MSR_GUEST_OS_ID:
1145 kvm->arch.hv_guest_os_id = data;
1146 /* setting guest os id to zero disables hypercall page */
1147 if (!kvm->arch.hv_guest_os_id)
1148 kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
1150 case HV_X64_MSR_HYPERCALL: {
1155 /* if guest os id is not set hypercall should remain disabled */
1156 if (!kvm->arch.hv_guest_os_id)
1158 if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
1159 kvm->arch.hv_hypercall = data;
1162 gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
1163 addr = gfn_to_hva(kvm, gfn);
1164 if (kvm_is_error_hva(addr))
1166 kvm_x86_ops->patch_hypercall(vcpu, instructions);
1167 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
1168 if (copy_to_user((void __user *)addr, instructions, 4))
1170 kvm->arch.hv_hypercall = data;
1174 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1175 "data 0x%llx\n", msr, data);
1181 static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1184 case HV_X64_MSR_APIC_ASSIST_PAGE: {
1187 if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
1188 vcpu->arch.hv_vapic = data;
1191 addr = gfn_to_hva(vcpu->kvm, data >>
1192 HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
1193 if (kvm_is_error_hva(addr))
1195 if (clear_user((void __user *)addr, PAGE_SIZE))
1197 vcpu->arch.hv_vapic = data;
1200 case HV_X64_MSR_EOI:
1201 return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
1202 case HV_X64_MSR_ICR:
1203 return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
1204 case HV_X64_MSR_TPR:
1205 return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
1207 pr_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
1208 "data 0x%llx\n", msr, data);
1215 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1219 return set_efer(vcpu, data);
1221 data &= ~(u64)0x40; /* ignore flush filter disable */
1222 data &= ~(u64)0x100; /* ignore ignne emulation enable */
1224 pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n",
1229 case MSR_FAM10H_MMIO_CONF_BASE:
1231 pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: "
1236 case MSR_AMD64_NB_CFG:
1238 case MSR_IA32_DEBUGCTLMSR:
1240 /* We support the non-activated case already */
1242 } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) {
1243 /* Values other than LBR and BTF are vendor-specific,
1244 thus reserved and should throw a #GP */
1247 pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n",
1250 case MSR_IA32_UCODE_REV:
1251 case MSR_IA32_UCODE_WRITE:
1252 case MSR_VM_HSAVE_PA:
1253 case MSR_AMD64_PATCH_LOADER:
1255 case 0x200 ... 0x2ff:
1256 return set_msr_mtrr(vcpu, msr, data);
1257 case MSR_IA32_APICBASE:
1258 kvm_set_apic_base(vcpu, data);
1260 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1261 return kvm_x2apic_msr_write(vcpu, msr, data);
1262 case MSR_IA32_MISC_ENABLE:
1263 vcpu->arch.ia32_misc_enable_msr = data;
1265 case MSR_KVM_WALL_CLOCK_NEW:
1266 case MSR_KVM_WALL_CLOCK:
1267 vcpu->kvm->arch.wall_clock = data;
1268 kvm_write_wall_clock(vcpu->kvm, data);
1270 case MSR_KVM_SYSTEM_TIME_NEW:
1271 case MSR_KVM_SYSTEM_TIME: {
1272 if (vcpu->arch.time_page) {
1273 kvm_release_page_dirty(vcpu->arch.time_page);
1274 vcpu->arch.time_page = NULL;
1277 vcpu->arch.time = data;
1279 /* we verify if the enable bit is set... */
1283 /* ...but clean it before doing the actual write */
1284 vcpu->arch.time_offset = data & ~(PAGE_MASK | 1);
1286 vcpu->arch.time_page =
1287 gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT);
1289 if (is_error_page(vcpu->arch.time_page)) {
1290 kvm_release_page_clean(vcpu->arch.time_page);
1291 vcpu->arch.time_page = NULL;
1294 kvm_request_guest_time_update(vcpu);
1297 case MSR_IA32_MCG_CTL:
1298 case MSR_IA32_MCG_STATUS:
1299 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1300 return set_msr_mce(vcpu, msr, data);
1302 /* Performance counters are not protected by a CPUID bit,
1303 * so we should check all of them in the generic path for the sake of
1304 * cross vendor migration.
1305 * Writing a zero into the event select MSRs disables them,
1306 * which we perfectly emulate ;-). Any other value should be at least
1307 * reported, some guests depend on them.
1309 case MSR_P6_EVNTSEL0:
1310 case MSR_P6_EVNTSEL1:
1311 case MSR_K7_EVNTSEL0:
1312 case MSR_K7_EVNTSEL1:
1313 case MSR_K7_EVNTSEL2:
1314 case MSR_K7_EVNTSEL3:
1316 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1317 "0x%x data 0x%llx\n", msr, data);
1319 /* at least RHEL 4 unconditionally writes to the perfctr registers,
1320 * so we ignore writes to make it happy.
1322 case MSR_P6_PERFCTR0:
1323 case MSR_P6_PERFCTR1:
1324 case MSR_K7_PERFCTR0:
1325 case MSR_K7_PERFCTR1:
1326 case MSR_K7_PERFCTR2:
1327 case MSR_K7_PERFCTR3:
1328 pr_unimpl(vcpu, "unimplemented perfctr wrmsr: "
1329 "0x%x data 0x%llx\n", msr, data);
1331 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1332 if (kvm_hv_msr_partition_wide(msr)) {
1334 mutex_lock(&vcpu->kvm->lock);
1335 r = set_msr_hyperv_pw(vcpu, msr, data);
1336 mutex_unlock(&vcpu->kvm->lock);
1339 return set_msr_hyperv(vcpu, msr, data);
1342 if (msr && (msr == vcpu->kvm->arch.xen_hvm_config.msr))
1343 return xen_hvm_config(vcpu, data);
1345 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n",
1349 pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n",
1356 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1360 * Reads an msr value (of 'msr_index') into 'pdata'.
1361 * Returns 0 on success, non-0 otherwise.
1362 * Assumes vcpu_load() was already called.
1364 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1366 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1369 static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1371 u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges;
1373 if (!msr_mtrr_valid(msr))
1376 if (msr == MSR_MTRRdefType)
1377 *pdata = vcpu->arch.mtrr_state.def_type +
1378 (vcpu->arch.mtrr_state.enabled << 10);
1379 else if (msr == MSR_MTRRfix64K_00000)
1381 else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000)
1382 *pdata = p[1 + msr - MSR_MTRRfix16K_80000];
1383 else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000)
1384 *pdata = p[3 + msr - MSR_MTRRfix4K_C0000];
1385 else if (msr == MSR_IA32_CR_PAT)
1386 *pdata = vcpu->arch.pat;
1387 else { /* Variable MTRRs */
1388 int idx, is_mtrr_mask;
1391 idx = (msr - 0x200) / 2;
1392 is_mtrr_mask = msr - 0x200 - 2 * idx;
1395 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo;
1398 (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo;
1405 static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1408 u64 mcg_cap = vcpu->arch.mcg_cap;
1409 unsigned bank_num = mcg_cap & 0xff;
1412 case MSR_IA32_P5_MC_ADDR:
1413 case MSR_IA32_P5_MC_TYPE:
1416 case MSR_IA32_MCG_CAP:
1417 data = vcpu->arch.mcg_cap;
1419 case MSR_IA32_MCG_CTL:
1420 if (!(mcg_cap & MCG_CTL_P))
1422 data = vcpu->arch.mcg_ctl;
1424 case MSR_IA32_MCG_STATUS:
1425 data = vcpu->arch.mcg_status;
1428 if (msr >= MSR_IA32_MC0_CTL &&
1429 msr < MSR_IA32_MC0_CTL + 4 * bank_num) {
1430 u32 offset = msr - MSR_IA32_MC0_CTL;
1431 data = vcpu->arch.mce_banks[offset];
1440 static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1443 struct kvm *kvm = vcpu->kvm;
1446 case HV_X64_MSR_GUEST_OS_ID:
1447 data = kvm->arch.hv_guest_os_id;
1449 case HV_X64_MSR_HYPERCALL:
1450 data = kvm->arch.hv_hypercall;
1453 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1461 static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1466 case HV_X64_MSR_VP_INDEX: {
1469 kvm_for_each_vcpu(r, v, vcpu->kvm)
1474 case HV_X64_MSR_EOI:
1475 return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
1476 case HV_X64_MSR_ICR:
1477 return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
1478 case HV_X64_MSR_TPR:
1479 return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
1481 pr_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
1488 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1493 case MSR_IA32_PLATFORM_ID:
1494 case MSR_IA32_UCODE_REV:
1495 case MSR_IA32_EBL_CR_POWERON:
1496 case MSR_IA32_DEBUGCTLMSR:
1497 case MSR_IA32_LASTBRANCHFROMIP:
1498 case MSR_IA32_LASTBRANCHTOIP:
1499 case MSR_IA32_LASTINTFROMIP:
1500 case MSR_IA32_LASTINTTOIP:
1503 case MSR_VM_HSAVE_PA:
1504 case MSR_P6_PERFCTR0:
1505 case MSR_P6_PERFCTR1:
1506 case MSR_P6_EVNTSEL0:
1507 case MSR_P6_EVNTSEL1:
1508 case MSR_K7_EVNTSEL0:
1509 case MSR_K7_PERFCTR0:
1510 case MSR_K8_INT_PENDING_MSG:
1511 case MSR_AMD64_NB_CFG:
1512 case MSR_FAM10H_MMIO_CONF_BASE:
1516 data = 0x500 | KVM_NR_VAR_MTRR;
1518 case 0x200 ... 0x2ff:
1519 return get_msr_mtrr(vcpu, msr, pdata);
1520 case 0xcd: /* fsb frequency */
1523 case MSR_IA32_APICBASE:
1524 data = kvm_get_apic_base(vcpu);
1526 case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
1527 return kvm_x2apic_msr_read(vcpu, msr, pdata);
1529 case MSR_IA32_MISC_ENABLE:
1530 data = vcpu->arch.ia32_misc_enable_msr;
1532 case MSR_IA32_PERF_STATUS:
1533 /* TSC increment by tick */
1535 /* CPU multiplier */
1536 data |= (((uint64_t)4ULL) << 40);
1539 data = vcpu->arch.efer;
1541 case MSR_KVM_WALL_CLOCK:
1542 case MSR_KVM_WALL_CLOCK_NEW:
1543 data = vcpu->kvm->arch.wall_clock;
1545 case MSR_KVM_SYSTEM_TIME:
1546 case MSR_KVM_SYSTEM_TIME_NEW:
1547 data = vcpu->arch.time;
1549 case MSR_IA32_P5_MC_ADDR:
1550 case MSR_IA32_P5_MC_TYPE:
1551 case MSR_IA32_MCG_CAP:
1552 case MSR_IA32_MCG_CTL:
1553 case MSR_IA32_MCG_STATUS:
1554 case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1:
1555 return get_msr_mce(vcpu, msr, pdata);
1556 case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
1557 if (kvm_hv_msr_partition_wide(msr)) {
1559 mutex_lock(&vcpu->kvm->lock);
1560 r = get_msr_hyperv_pw(vcpu, msr, pdata);
1561 mutex_unlock(&vcpu->kvm->lock);
1564 return get_msr_hyperv(vcpu, msr, pdata);
1568 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
1571 pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr);
1579 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1582 * Read or write a bunch of msrs. All parameters are kernel addresses.
1584 * @return number of msrs set successfully.
1586 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
1587 struct kvm_msr_entry *entries,
1588 int (*do_msr)(struct kvm_vcpu *vcpu,
1589 unsigned index, u64 *data))
1593 idx = srcu_read_lock(&vcpu->kvm->srcu);
1594 for (i = 0; i < msrs->nmsrs; ++i)
1595 if (do_msr(vcpu, entries[i].index, &entries[i].data))
1597 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1603 * Read or write a bunch of msrs. Parameters are user addresses.
1605 * @return number of msrs set successfully.
1607 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
1608 int (*do_msr)(struct kvm_vcpu *vcpu,
1609 unsigned index, u64 *data),
1612 struct kvm_msrs msrs;
1613 struct kvm_msr_entry *entries;
1618 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
1622 if (msrs.nmsrs >= MAX_IO_MSRS)
1626 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
1627 entries = kmalloc(size, GFP_KERNEL);
1632 if (copy_from_user(entries, user_msrs->entries, size))
1635 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
1640 if (writeback && copy_to_user(user_msrs->entries, entries, size))
1651 int kvm_dev_ioctl_check_extension(long ext)
1656 case KVM_CAP_IRQCHIP:
1658 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
1659 case KVM_CAP_SET_TSS_ADDR:
1660 case KVM_CAP_EXT_CPUID:
1661 case KVM_CAP_CLOCKSOURCE:
1663 case KVM_CAP_NOP_IO_DELAY:
1664 case KVM_CAP_MP_STATE:
1665 case KVM_CAP_SYNC_MMU:
1666 case KVM_CAP_REINJECT_CONTROL:
1667 case KVM_CAP_IRQ_INJECT_STATUS:
1668 case KVM_CAP_ASSIGN_DEV_IRQ:
1670 case KVM_CAP_IOEVENTFD:
1672 case KVM_CAP_PIT_STATE2:
1673 case KVM_CAP_SET_IDENTITY_MAP_ADDR:
1674 case KVM_CAP_XEN_HVM:
1675 case KVM_CAP_ADJUST_CLOCK:
1676 case KVM_CAP_VCPU_EVENTS:
1677 case KVM_CAP_HYPERV:
1678 case KVM_CAP_HYPERV_VAPIC:
1679 case KVM_CAP_HYPERV_SPIN:
1680 case KVM_CAP_PCI_SEGMENT:
1681 case KVM_CAP_DEBUGREGS:
1682 case KVM_CAP_X86_ROBUST_SINGLESTEP:
1686 case KVM_CAP_COALESCED_MMIO:
1687 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
1690 r = !kvm_x86_ops->cpu_has_accelerated_tpr();
1692 case KVM_CAP_NR_VCPUS:
1695 case KVM_CAP_NR_MEMSLOTS:
1696 r = KVM_MEMORY_SLOTS;
1698 case KVM_CAP_PV_MMU: /* obsolete */
1705 r = KVM_MAX_MCE_BANKS;
1718 long kvm_arch_dev_ioctl(struct file *filp,
1719 unsigned int ioctl, unsigned long arg)
1721 void __user *argp = (void __user *)arg;
1725 case KVM_GET_MSR_INDEX_LIST: {
1726 struct kvm_msr_list __user *user_msr_list = argp;
1727 struct kvm_msr_list msr_list;
1731 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
1734 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
1735 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
1738 if (n < msr_list.nmsrs)
1741 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
1742 num_msrs_to_save * sizeof(u32)))
1744 if (copy_to_user(user_msr_list->indices + num_msrs_to_save,
1746 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
1751 case KVM_GET_SUPPORTED_CPUID: {
1752 struct kvm_cpuid2 __user *cpuid_arg = argp;
1753 struct kvm_cpuid2 cpuid;
1756 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
1758 r = kvm_dev_ioctl_get_supported_cpuid(&cpuid,
1759 cpuid_arg->entries);
1764 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
1769 case KVM_X86_GET_MCE_CAP_SUPPORTED: {
1772 mce_cap = KVM_MCE_CAP_SUPPORTED;
1774 if (copy_to_user(argp, &mce_cap, sizeof mce_cap))
1786 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1788 kvm_x86_ops->vcpu_load(vcpu, cpu);
1789 if (unlikely(per_cpu(cpu_tsc_khz, cpu) == 0)) {
1790 unsigned long khz = cpufreq_quick_get(cpu);
1793 per_cpu(cpu_tsc_khz, cpu) = khz;
1795 kvm_request_guest_time_update(vcpu);
1798 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1800 kvm_x86_ops->vcpu_put(vcpu);
1801 kvm_put_guest_fpu(vcpu);
1804 static int is_efer_nx(void)
1806 unsigned long long efer = 0;
1808 rdmsrl_safe(MSR_EFER, &efer);
1809 return efer & EFER_NX;
1812 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
1815 struct kvm_cpuid_entry2 *e, *entry;
1818 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
1819 e = &vcpu->arch.cpuid_entries[i];
1820 if (e->function == 0x80000001) {
1825 if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) {
1826 entry->edx &= ~(1 << 20);
1827 printk(KERN_INFO "kvm: guest NX capability removed\n");
1831 /* when an old userspace process fills a new kernel module */
1832 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
1833 struct kvm_cpuid *cpuid,
1834 struct kvm_cpuid_entry __user *entries)
1837 struct kvm_cpuid_entry *cpuid_entries;
1840 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1843 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent);
1847 if (copy_from_user(cpuid_entries, entries,
1848 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
1850 for (i = 0; i < cpuid->nent; i++) {
1851 vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function;
1852 vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax;
1853 vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx;
1854 vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx;
1855 vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx;
1856 vcpu->arch.cpuid_entries[i].index = 0;
1857 vcpu->arch.cpuid_entries[i].flags = 0;
1858 vcpu->arch.cpuid_entries[i].padding[0] = 0;
1859 vcpu->arch.cpuid_entries[i].padding[1] = 0;
1860 vcpu->arch.cpuid_entries[i].padding[2] = 0;
1862 vcpu->arch.cpuid_nent = cpuid->nent;
1863 cpuid_fix_nx_cap(vcpu);
1865 kvm_apic_set_version(vcpu);
1866 kvm_x86_ops->cpuid_update(vcpu);
1870 vfree(cpuid_entries);
1875 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
1876 struct kvm_cpuid2 *cpuid,
1877 struct kvm_cpuid_entry2 __user *entries)
1882 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
1885 if (copy_from_user(&vcpu->arch.cpuid_entries, entries,
1886 cpuid->nent * sizeof(struct kvm_cpuid_entry2)))
1888 vcpu->arch.cpuid_nent = cpuid->nent;
1889 kvm_apic_set_version(vcpu);
1890 kvm_x86_ops->cpuid_update(vcpu);
1898 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu,
1899 struct kvm_cpuid2 *cpuid,
1900 struct kvm_cpuid_entry2 __user *entries)
1905 if (cpuid->nent < vcpu->arch.cpuid_nent)
1908 if (copy_to_user(entries, &vcpu->arch.cpuid_entries,
1909 vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2)))
1914 cpuid->nent = vcpu->arch.cpuid_nent;
1918 static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1921 entry->function = function;
1922 entry->index = index;
1923 cpuid_count(entry->function, entry->index,
1924 &entry->eax, &entry->ebx, &entry->ecx, &entry->edx);
1928 #define F(x) bit(X86_FEATURE_##x)
1930 static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
1931 u32 index, int *nent, int maxnent)
1933 unsigned f_nx = is_efer_nx() ? F(NX) : 0;
1934 #ifdef CONFIG_X86_64
1935 unsigned f_gbpages = (kvm_x86_ops->get_lpage_level() == PT_PDPE_LEVEL)
1937 unsigned f_lm = F(LM);
1939 unsigned f_gbpages = 0;
1942 unsigned f_rdtscp = kvm_x86_ops->rdtscp_supported() ? F(RDTSCP) : 0;
1945 const u32 kvm_supported_word0_x86_features =
1946 F(FPU) | F(VME) | F(DE) | F(PSE) |
1947 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1948 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
1949 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1950 F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) |
1951 0 /* Reserved, DS, ACPI */ | F(MMX) |
1952 F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
1953 0 /* HTT, TM, Reserved, PBE */;
1954 /* cpuid 0x80000001.edx */
1955 const u32 kvm_supported_word1_x86_features =
1956 F(FPU) | F(VME) | F(DE) | F(PSE) |
1957 F(TSC) | F(MSR) | F(PAE) | F(MCE) |
1958 F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) |
1959 F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
1960 F(PAT) | F(PSE36) | 0 /* Reserved */ |
1961 f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) |
1962 F(FXSR) | F(FXSR_OPT) | f_gbpages | f_rdtscp |
1963 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW);
1965 const u32 kvm_supported_word4_x86_features =
1966 F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ |
1967 0 /* DS-CPL, VMX, SMX, EST */ |
1968 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
1969 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ |
1970 0 /* Reserved, DCA */ | F(XMM4_1) |
1971 F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
1972 0 /* Reserved, AES */ | F(XSAVE) | 0 /* OSXSAVE */;
1973 /* cpuid 0x80000001.ecx */
1974 const u32 kvm_supported_word6_x86_features =
1975 F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ |
1976 F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
1977 F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) |
1978 0 /* SKINIT */ | 0 /* WDT */;
1980 /* all calls to cpuid_count() should be made on the same cpu */
1982 do_cpuid_1_ent(entry, function, index);
1987 entry->eax = min(entry->eax, (u32)0xd);
1990 entry->edx &= kvm_supported_word0_x86_features;
1991 entry->ecx &= kvm_supported_word4_x86_features;
1992 /* we support x2apic emulation even if host does not support
1993 * it since we emulate x2apic in software */
1994 entry->ecx |= F(X2APIC);
1996 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1997 * may return different values. This forces us to get_cpu() before
1998 * issuing the first command, and also to emulate this annoying behavior
1999 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
2001 int t, times = entry->eax & 0xff;
2003 entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
2004 entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
2005 for (t = 1; t < times && *nent < maxnent; ++t) {
2006 do_cpuid_1_ent(&entry[t], function, 0);
2007 entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC;
2012 /* function 4 and 0xb have additional index. */
2016 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2017 /* read more entries until cache_type is zero */
2018 for (i = 1; *nent < maxnent; ++i) {
2019 cache_type = entry[i - 1].eax & 0x1f;
2022 do_cpuid_1_ent(&entry[i], function, i);
2024 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2032 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2033 /* read more entries until level_type is zero */
2034 for (i = 1; *nent < maxnent; ++i) {
2035 level_type = entry[i - 1].ecx & 0xff00;
2038 do_cpuid_1_ent(&entry[i], function, i);
2040 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2048 entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2049 for (i = 1; *nent < maxnent; ++i) {
2050 if (entry[i - 1].eax == 0 && i != 2)
2052 do_cpuid_1_ent(&entry[i], function, i);
2054 KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
2059 case KVM_CPUID_SIGNATURE: {
2060 char signature[12] = "KVMKVMKVM\0\0";
2061 u32 *sigptr = (u32 *)signature;
2063 entry->ebx = sigptr[0];
2064 entry->ecx = sigptr[1];
2065 entry->edx = sigptr[2];
2068 case KVM_CPUID_FEATURES:
2069 entry->eax = (1 << KVM_FEATURE_CLOCKSOURCE) |
2070 (1 << KVM_FEATURE_NOP_IO_DELAY) |
2071 (1 << KVM_FEATURE_CLOCKSOURCE2) |
2072 (1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT);
2078 entry->eax = min(entry->eax, 0x8000001a);
2081 entry->edx &= kvm_supported_word1_x86_features;
2082 entry->ecx &= kvm_supported_word6_x86_features;
2086 kvm_x86_ops->set_supported_cpuid(function, entry);
2093 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
2094 struct kvm_cpuid_entry2 __user *entries)
2096 struct kvm_cpuid_entry2 *cpuid_entries;
2097 int limit, nent = 0, r = -E2BIG;
2100 if (cpuid->nent < 1)
2102 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2103 cpuid->nent = KVM_MAX_CPUID_ENTRIES;
2105 cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent);
2109 do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent);
2110 limit = cpuid_entries[0].eax;
2111 for (func = 1; func <= limit && nent < cpuid->nent; ++func)
2112 do_cpuid_ent(&cpuid_entries[nent], func, 0,
2113 &nent, cpuid->nent);
2115 if (nent >= cpuid->nent)
2118 do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent);
2119 limit = cpuid_entries[nent - 1].eax;
2120 for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func)
2121 do_cpuid_ent(&cpuid_entries[nent], func, 0,
2122 &nent, cpuid->nent);
2127 if (nent >= cpuid->nent)
2130 do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent,
2134 if (nent >= cpuid->nent)
2137 do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_FEATURES, 0, &nent,
2141 if (nent >= cpuid->nent)
2145 if (copy_to_user(entries, cpuid_entries,
2146 nent * sizeof(struct kvm_cpuid_entry2)))
2152 vfree(cpuid_entries);
2157 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2158 struct kvm_lapic_state *s)
2160 memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);
2165 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2166 struct kvm_lapic_state *s)
2168 memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s);
2169 kvm_apic_post_state_restore(vcpu);
2170 update_cr8_intercept(vcpu);
2175 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2176 struct kvm_interrupt *irq)
2178 if (irq->irq < 0 || irq->irq >= 256)
2180 if (irqchip_in_kernel(vcpu->kvm))
2183 kvm_queue_interrupt(vcpu, irq->irq, false);
2188 static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu)
2190 kvm_inject_nmi(vcpu);
2195 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu,
2196 struct kvm_tpr_access_ctl *tac)
2200 vcpu->arch.tpr_access_reporting = !!tac->enabled;
2204 static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu,
2208 unsigned bank_num = mcg_cap & 0xff, bank;
2211 if (!bank_num || bank_num >= KVM_MAX_MCE_BANKS)
2213 if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000))
2216 vcpu->arch.mcg_cap = mcg_cap;
2217 /* Init IA32_MCG_CTL to all 1s */
2218 if (mcg_cap & MCG_CTL_P)
2219 vcpu->arch.mcg_ctl = ~(u64)0;
2220 /* Init IA32_MCi_CTL to all 1s */
2221 for (bank = 0; bank < bank_num; bank++)
2222 vcpu->arch.mce_banks[bank*4] = ~(u64)0;
2227 static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu,
2228 struct kvm_x86_mce *mce)
2230 u64 mcg_cap = vcpu->arch.mcg_cap;
2231 unsigned bank_num = mcg_cap & 0xff;
2232 u64 *banks = vcpu->arch.mce_banks;
2234 if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL))
2237 * if IA32_MCG_CTL is not all 1s, the uncorrected error
2238 * reporting is disabled
2240 if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) &&
2241 vcpu->arch.mcg_ctl != ~(u64)0)
2243 banks += 4 * mce->bank;
2245 * if IA32_MCi_CTL is not all 1s, the uncorrected error
2246 * reporting is disabled for the bank
2248 if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0)
2250 if (mce->status & MCI_STATUS_UC) {
2251 if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) ||
2252 !kvm_read_cr4_bits(vcpu, X86_CR4_MCE)) {
2253 printk(KERN_DEBUG "kvm: set_mce: "
2254 "injects mce exception while "
2255 "previous one is in progress!\n");
2256 set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests);
2259 if (banks[1] & MCI_STATUS_VAL)
2260 mce->status |= MCI_STATUS_OVER;
2261 banks[2] = mce->addr;
2262 banks[3] = mce->misc;
2263 vcpu->arch.mcg_status = mce->mcg_status;
2264 banks[1] = mce->status;
2265 kvm_queue_exception(vcpu, MC_VECTOR);
2266 } else if (!(banks[1] & MCI_STATUS_VAL)
2267 || !(banks[1] & MCI_STATUS_UC)) {
2268 if (banks[1] & MCI_STATUS_VAL)
2269 mce->status |= MCI_STATUS_OVER;
2270 banks[2] = mce->addr;
2271 banks[3] = mce->misc;
2272 banks[1] = mce->status;
2274 banks[1] |= MCI_STATUS_OVER;
2278 static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
2279 struct kvm_vcpu_events *events)
2281 events->exception.injected =
2282 vcpu->arch.exception.pending &&
2283 !kvm_exception_is_soft(vcpu->arch.exception.nr);
2284 events->exception.nr = vcpu->arch.exception.nr;
2285 events->exception.has_error_code = vcpu->arch.exception.has_error_code;
2286 events->exception.error_code = vcpu->arch.exception.error_code;
2288 events->interrupt.injected =
2289 vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft;
2290 events->interrupt.nr = vcpu->arch.interrupt.nr;
2291 events->interrupt.soft = 0;
2292 events->interrupt.shadow =
2293 kvm_x86_ops->get_interrupt_shadow(vcpu,
2294 KVM_X86_SHADOW_INT_MOV_SS | KVM_X86_SHADOW_INT_STI);
2296 events->nmi.injected = vcpu->arch.nmi_injected;
2297 events->nmi.pending = vcpu->arch.nmi_pending;
2298 events->nmi.masked = kvm_x86_ops->get_nmi_mask(vcpu);
2300 events->sipi_vector = vcpu->arch.sipi_vector;
2302 events->flags = (KVM_VCPUEVENT_VALID_NMI_PENDING
2303 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2304 | KVM_VCPUEVENT_VALID_SHADOW);
2307 static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
2308 struct kvm_vcpu_events *events)
2310 if (events->flags & ~(KVM_VCPUEVENT_VALID_NMI_PENDING
2311 | KVM_VCPUEVENT_VALID_SIPI_VECTOR
2312 | KVM_VCPUEVENT_VALID_SHADOW))
2315 vcpu->arch.exception.pending = events->exception.injected;
2316 vcpu->arch.exception.nr = events->exception.nr;
2317 vcpu->arch.exception.has_error_code = events->exception.has_error_code;
2318 vcpu->arch.exception.error_code = events->exception.error_code;
2320 vcpu->arch.interrupt.pending = events->interrupt.injected;
2321 vcpu->arch.interrupt.nr = events->interrupt.nr;
2322 vcpu->arch.interrupt.soft = events->interrupt.soft;
2323 if (vcpu->arch.interrupt.pending && irqchip_in_kernel(vcpu->kvm))
2324 kvm_pic_clear_isr_ack(vcpu->kvm);
2325 if (events->flags & KVM_VCPUEVENT_VALID_SHADOW)
2326 kvm_x86_ops->set_interrupt_shadow(vcpu,
2327 events->interrupt.shadow);
2329 vcpu->arch.nmi_injected = events->nmi.injected;
2330 if (events->flags & KVM_VCPUEVENT_VALID_NMI_PENDING)
2331 vcpu->arch.nmi_pending = events->nmi.pending;
2332 kvm_x86_ops->set_nmi_mask(vcpu, events->nmi.masked);
2334 if (events->flags & KVM_VCPUEVENT_VALID_SIPI_VECTOR)
2335 vcpu->arch.sipi_vector = events->sipi_vector;
2340 static void kvm_vcpu_ioctl_x86_get_debugregs(struct kvm_vcpu *vcpu,
2341 struct kvm_debugregs *dbgregs)
2343 memcpy(dbgregs->db, vcpu->arch.db, sizeof(vcpu->arch.db));
2344 dbgregs->dr6 = vcpu->arch.dr6;
2345 dbgregs->dr7 = vcpu->arch.dr7;
2349 static int kvm_vcpu_ioctl_x86_set_debugregs(struct kvm_vcpu *vcpu,
2350 struct kvm_debugregs *dbgregs)
2355 memcpy(vcpu->arch.db, dbgregs->db, sizeof(vcpu->arch.db));
2356 vcpu->arch.dr6 = dbgregs->dr6;
2357 vcpu->arch.dr7 = dbgregs->dr7;
2362 static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu,
2363 struct kvm_xsave *guest_xsave)
2366 memcpy(guest_xsave->region,
2367 &vcpu->arch.guest_fpu.state->xsave,
2368 sizeof(struct xsave_struct));
2370 memcpy(guest_xsave->region,
2371 &vcpu->arch.guest_fpu.state->fxsave,
2372 sizeof(struct i387_fxsave_struct));
2373 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] =
2378 static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu,
2379 struct kvm_xsave *guest_xsave)
2382 *(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)];
2385 memcpy(&vcpu->arch.guest_fpu.state->xsave,
2386 guest_xsave->region, sizeof(struct xsave_struct));
2388 if (xstate_bv & ~XSTATE_FPSSE)
2390 memcpy(&vcpu->arch.guest_fpu.state->fxsave,
2391 guest_xsave->region, sizeof(struct i387_fxsave_struct));
2396 static void kvm_vcpu_ioctl_x86_get_xcrs(struct kvm_vcpu *vcpu,
2397 struct kvm_xcrs *guest_xcrs)
2399 if (!cpu_has_xsave) {
2400 guest_xcrs->nr_xcrs = 0;
2404 guest_xcrs->nr_xcrs = 1;
2405 guest_xcrs->flags = 0;
2406 guest_xcrs->xcrs[0].xcr = XCR_XFEATURE_ENABLED_MASK;
2407 guest_xcrs->xcrs[0].value = vcpu->arch.xcr0;
2410 static int kvm_vcpu_ioctl_x86_set_xcrs(struct kvm_vcpu *vcpu,
2411 struct kvm_xcrs *guest_xcrs)
2418 if (guest_xcrs->nr_xcrs > KVM_MAX_XCRS || guest_xcrs->flags)
2421 for (i = 0; i < guest_xcrs->nr_xcrs; i++)
2422 /* Only support XCR0 currently */
2423 if (guest_xcrs->xcrs[0].xcr == XCR_XFEATURE_ENABLED_MASK) {
2424 r = __kvm_set_xcr(vcpu, XCR_XFEATURE_ENABLED_MASK,
2425 guest_xcrs->xcrs[0].value);
2433 long kvm_arch_vcpu_ioctl(struct file *filp,
2434 unsigned int ioctl, unsigned long arg)
2436 struct kvm_vcpu *vcpu = filp->private_data;
2437 void __user *argp = (void __user *)arg;
2439 struct kvm_lapic_state *lapic = NULL;
2442 case KVM_GET_LAPIC: {
2444 if (!vcpu->arch.apic)
2446 lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2451 r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic);
2455 if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state)))
2460 case KVM_SET_LAPIC: {
2462 if (!vcpu->arch.apic)
2464 lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
2469 if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state)))
2471 r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic);
2477 case KVM_INTERRUPT: {
2478 struct kvm_interrupt irq;
2481 if (copy_from_user(&irq, argp, sizeof irq))
2483 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2490 r = kvm_vcpu_ioctl_nmi(vcpu);
2496 case KVM_SET_CPUID: {
2497 struct kvm_cpuid __user *cpuid_arg = argp;
2498 struct kvm_cpuid cpuid;
2501 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2503 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2508 case KVM_SET_CPUID2: {
2509 struct kvm_cpuid2 __user *cpuid_arg = argp;
2510 struct kvm_cpuid2 cpuid;
2513 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2515 r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
2516 cpuid_arg->entries);
2521 case KVM_GET_CPUID2: {
2522 struct kvm_cpuid2 __user *cpuid_arg = argp;
2523 struct kvm_cpuid2 cpuid;
2526 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2528 r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
2529 cpuid_arg->entries);
2533 if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
2539 r = msr_io(vcpu, argp, kvm_get_msr, 1);
2542 r = msr_io(vcpu, argp, do_set_msr, 0);
2544 case KVM_TPR_ACCESS_REPORTING: {
2545 struct kvm_tpr_access_ctl tac;
2548 if (copy_from_user(&tac, argp, sizeof tac))
2550 r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
2554 if (copy_to_user(argp, &tac, sizeof tac))
2559 case KVM_SET_VAPIC_ADDR: {
2560 struct kvm_vapic_addr va;
2563 if (!irqchip_in_kernel(vcpu->kvm))
2566 if (copy_from_user(&va, argp, sizeof va))
2569 kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
2572 case KVM_X86_SETUP_MCE: {
2576 if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
2578 r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
2581 case KVM_X86_SET_MCE: {
2582 struct kvm_x86_mce mce;
2585 if (copy_from_user(&mce, argp, sizeof mce))
2587 r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
2590 case KVM_GET_VCPU_EVENTS: {
2591 struct kvm_vcpu_events events;
2593 kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
2596 if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
2601 case KVM_SET_VCPU_EVENTS: {
2602 struct kvm_vcpu_events events;
2605 if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
2608 r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
2611 case KVM_GET_DEBUGREGS: {
2612 struct kvm_debugregs dbgregs;
2614 kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
2617 if (copy_to_user(argp, &dbgregs,
2618 sizeof(struct kvm_debugregs)))
2623 case KVM_SET_DEBUGREGS: {
2624 struct kvm_debugregs dbgregs;
2627 if (copy_from_user(&dbgregs, argp,
2628 sizeof(struct kvm_debugregs)))
2631 r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
2634 case KVM_GET_XSAVE: {
2635 struct kvm_xsave *xsave;
2637 xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
2642 kvm_vcpu_ioctl_x86_get_xsave(vcpu, xsave);
2645 if (copy_to_user(argp, xsave, sizeof(struct kvm_xsave)))
2650 case KVM_SET_XSAVE: {
2651 struct kvm_xsave *xsave;
2653 xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
2659 if (copy_from_user(xsave, argp, sizeof(struct kvm_xsave)))
2662 r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, xsave);
2665 case KVM_GET_XCRS: {
2666 struct kvm_xcrs *xcrs;
2668 xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
2673 kvm_vcpu_ioctl_x86_get_xcrs(vcpu, xcrs);
2676 if (copy_to_user(argp, xcrs,
2677 sizeof(struct kvm_xcrs)))
2682 case KVM_SET_XCRS: {
2683 struct kvm_xcrs *xcrs;
2685 xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
2691 if (copy_from_user(xcrs, argp,
2692 sizeof(struct kvm_xcrs)))
2695 r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, xcrs);
2706 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
2710 if (addr > (unsigned int)(-3 * PAGE_SIZE))
2712 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
2716 static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm,
2719 kvm->arch.ept_identity_map_addr = ident_addr;
2723 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
2724 u32 kvm_nr_mmu_pages)
2726 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
2729 mutex_lock(&kvm->slots_lock);
2730 spin_lock(&kvm->mmu_lock);
2732 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
2733 kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
2735 spin_unlock(&kvm->mmu_lock);
2736 mutex_unlock(&kvm->slots_lock);
2740 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
2742 return kvm->arch.n_alloc_mmu_pages;
2745 gfn_t unalias_gfn_instantiation(struct kvm *kvm, gfn_t gfn)
2748 struct kvm_mem_alias *alias;
2749 struct kvm_mem_aliases *aliases;
2751 aliases = kvm_aliases(kvm);
2753 for (i = 0; i < aliases->naliases; ++i) {
2754 alias = &aliases->aliases[i];
2755 if (alias->flags & KVM_ALIAS_INVALID)
2757 if (gfn >= alias->base_gfn
2758 && gfn < alias->base_gfn + alias->npages)
2759 return alias->target_gfn + gfn - alias->base_gfn;
2764 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
2767 struct kvm_mem_alias *alias;
2768 struct kvm_mem_aliases *aliases;
2770 aliases = kvm_aliases(kvm);
2772 for (i = 0; i < aliases->naliases; ++i) {
2773 alias = &aliases->aliases[i];
2774 if (gfn >= alias->base_gfn
2775 && gfn < alias->base_gfn + alias->npages)
2776 return alias->target_gfn + gfn - alias->base_gfn;
2782 * Set a new alias region. Aliases map a portion of physical memory into
2783 * another portion. This is useful for memory windows, for example the PC
2786 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
2787 struct kvm_memory_alias *alias)
2790 struct kvm_mem_alias *p;
2791 struct kvm_mem_aliases *aliases, *old_aliases;
2794 /* General sanity checks */
2795 if (alias->memory_size & (PAGE_SIZE - 1))
2797 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
2799 if (alias->slot >= KVM_ALIAS_SLOTS)
2801 if (alias->guest_phys_addr + alias->memory_size
2802 < alias->guest_phys_addr)
2804 if (alias->target_phys_addr + alias->memory_size
2805 < alias->target_phys_addr)
2809 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2813 mutex_lock(&kvm->slots_lock);
2815 /* invalidate any gfn reference in case of deletion/shrinking */
2816 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2817 aliases->aliases[alias->slot].flags |= KVM_ALIAS_INVALID;
2818 old_aliases = kvm->arch.aliases;
2819 rcu_assign_pointer(kvm->arch.aliases, aliases);
2820 synchronize_srcu_expedited(&kvm->srcu);
2821 kvm_mmu_zap_all(kvm);
2825 aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
2829 memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
2831 p = &aliases->aliases[alias->slot];
2832 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
2833 p->npages = alias->memory_size >> PAGE_SHIFT;
2834 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
2835 p->flags &= ~(KVM_ALIAS_INVALID);
2837 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
2838 if (aliases->aliases[n - 1].npages)
2840 aliases->naliases = n;
2842 old_aliases = kvm->arch.aliases;
2843 rcu_assign_pointer(kvm->arch.aliases, aliases);
2844 synchronize_srcu_expedited(&kvm->srcu);
2849 mutex_unlock(&kvm->slots_lock);
2854 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2859 switch (chip->chip_id) {
2860 case KVM_IRQCHIP_PIC_MASTER:
2861 memcpy(&chip->chip.pic,
2862 &pic_irqchip(kvm)->pics[0],
2863 sizeof(struct kvm_pic_state));
2865 case KVM_IRQCHIP_PIC_SLAVE:
2866 memcpy(&chip->chip.pic,
2867 &pic_irqchip(kvm)->pics[1],
2868 sizeof(struct kvm_pic_state));
2870 case KVM_IRQCHIP_IOAPIC:
2871 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
2880 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
2885 switch (chip->chip_id) {
2886 case KVM_IRQCHIP_PIC_MASTER:
2887 raw_spin_lock(&pic_irqchip(kvm)->lock);
2888 memcpy(&pic_irqchip(kvm)->pics[0],
2890 sizeof(struct kvm_pic_state));
2891 raw_spin_unlock(&pic_irqchip(kvm)->lock);
2893 case KVM_IRQCHIP_PIC_SLAVE:
2894 raw_spin_lock(&pic_irqchip(kvm)->lock);
2895 memcpy(&pic_irqchip(kvm)->pics[1],
2897 sizeof(struct kvm_pic_state));
2898 raw_spin_unlock(&pic_irqchip(kvm)->lock);
2900 case KVM_IRQCHIP_IOAPIC:
2901 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
2907 kvm_pic_update_irq(pic_irqchip(kvm));
2911 static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2915 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2916 memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state));
2917 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2921 static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps)
2925 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2926 memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state));
2927 kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0);
2928 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2932 static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2936 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2937 memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels,
2938 sizeof(ps->channels));
2939 ps->flags = kvm->arch.vpit->pit_state.flags;
2940 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2944 static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps)
2946 int r = 0, start = 0;
2947 u32 prev_legacy, cur_legacy;
2948 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2949 prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY;
2950 cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY;
2951 if (!prev_legacy && cur_legacy)
2953 memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels,
2954 sizeof(kvm->arch.vpit->pit_state.channels));
2955 kvm->arch.vpit->pit_state.flags = ps->flags;
2956 kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start);
2957 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2961 static int kvm_vm_ioctl_reinject(struct kvm *kvm,
2962 struct kvm_reinject_control *control)
2964 if (!kvm->arch.vpit)
2966 mutex_lock(&kvm->arch.vpit->pit_state.lock);
2967 kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject;
2968 mutex_unlock(&kvm->arch.vpit->pit_state.lock);
2973 * Get (and clear) the dirty memory log for a memory slot.
2975 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
2976 struct kvm_dirty_log *log)
2979 struct kvm_memory_slot *memslot;
2981 unsigned long is_dirty = 0;
2983 mutex_lock(&kvm->slots_lock);
2986 if (log->slot >= KVM_MEMORY_SLOTS)
2989 memslot = &kvm->memslots->memslots[log->slot];
2991 if (!memslot->dirty_bitmap)
2994 n = kvm_dirty_bitmap_bytes(memslot);
2996 for (i = 0; !is_dirty && i < n/sizeof(long); i++)
2997 is_dirty = memslot->dirty_bitmap[i];
2999 /* If nothing is dirty, don't bother messing with page tables. */
3001 struct kvm_memslots *slots, *old_slots;
3002 unsigned long *dirty_bitmap;
3004 spin_lock(&kvm->mmu_lock);
3005 kvm_mmu_slot_remove_write_access(kvm, log->slot);
3006 spin_unlock(&kvm->mmu_lock);
3009 dirty_bitmap = vmalloc(n);
3012 memset(dirty_bitmap, 0, n);
3015 slots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
3017 vfree(dirty_bitmap);
3020 memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots));
3021 slots->memslots[log->slot].dirty_bitmap = dirty_bitmap;
3023 old_slots = kvm->memslots;
3024 rcu_assign_pointer(kvm->memslots, slots);
3025 synchronize_srcu_expedited(&kvm->srcu);
3026 dirty_bitmap = old_slots->memslots[log->slot].dirty_bitmap;
3030 if (copy_to_user(log->dirty_bitmap, dirty_bitmap, n)) {
3031 vfree(dirty_bitmap);
3034 vfree(dirty_bitmap);
3037 if (clear_user(log->dirty_bitmap, n))
3043 mutex_unlock(&kvm->slots_lock);
3047 long kvm_arch_vm_ioctl(struct file *filp,
3048 unsigned int ioctl, unsigned long arg)
3050 struct kvm *kvm = filp->private_data;
3051 void __user *argp = (void __user *)arg;
3054 * This union makes it completely explicit to gcc-3.x
3055 * that these two variables' stack usage should be
3056 * combined, not added together.
3059 struct kvm_pit_state ps;
3060 struct kvm_pit_state2 ps2;
3061 struct kvm_memory_alias alias;
3062 struct kvm_pit_config pit_config;
3066 case KVM_SET_TSS_ADDR:
3067 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
3071 case KVM_SET_IDENTITY_MAP_ADDR: {
3075 if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
3077 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
3082 case KVM_SET_MEMORY_REGION: {
3083 struct kvm_memory_region kvm_mem;
3084 struct kvm_userspace_memory_region kvm_userspace_mem;
3087 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
3089 kvm_userspace_mem.slot = kvm_mem.slot;
3090 kvm_userspace_mem.flags = kvm_mem.flags;
3091 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
3092 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
3093 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
3098 case KVM_SET_NR_MMU_PAGES:
3099 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
3103 case KVM_GET_NR_MMU_PAGES:
3104 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
3106 case KVM_SET_MEMORY_ALIAS:
3108 if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias)))
3110 r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias);
3114 case KVM_CREATE_IRQCHIP: {
3115 struct kvm_pic *vpic;
3117 mutex_lock(&kvm->lock);
3120 goto create_irqchip_unlock;
3122 vpic = kvm_create_pic(kvm);
3124 r = kvm_ioapic_init(kvm);
3126 kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
3129 goto create_irqchip_unlock;
3132 goto create_irqchip_unlock;
3134 kvm->arch.vpic = vpic;
3136 r = kvm_setup_default_irq_routing(kvm);
3138 mutex_lock(&kvm->irq_lock);
3139 kvm_ioapic_destroy(kvm);
3140 kvm_destroy_pic(kvm);
3141 mutex_unlock(&kvm->irq_lock);
3143 create_irqchip_unlock:
3144 mutex_unlock(&kvm->lock);
3147 case KVM_CREATE_PIT:
3148 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
3150 case KVM_CREATE_PIT2:
3152 if (copy_from_user(&u.pit_config, argp,
3153 sizeof(struct kvm_pit_config)))
3156 mutex_lock(&kvm->slots_lock);
3159 goto create_pit_unlock;
3161 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
3165 mutex_unlock(&kvm->slots_lock);
3167 case KVM_IRQ_LINE_STATUS:
3168 case KVM_IRQ_LINE: {
3169 struct kvm_irq_level irq_event;
3172 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3175 if (irqchip_in_kernel(kvm)) {
3177 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
3178 irq_event.irq, irq_event.level);
3179 if (ioctl == KVM_IRQ_LINE_STATUS) {
3181 irq_event.status = status;
3182 if (copy_to_user(argp, &irq_event,
3190 case KVM_GET_IRQCHIP: {
3191 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3192 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
3198 if (copy_from_user(chip, argp, sizeof *chip))
3199 goto get_irqchip_out;
3201 if (!irqchip_in_kernel(kvm))
3202 goto get_irqchip_out;
3203 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
3205 goto get_irqchip_out;
3207 if (copy_to_user(argp, chip, sizeof *chip))
3208 goto get_irqchip_out;
3216 case KVM_SET_IRQCHIP: {
3217 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3218 struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL);
3224 if (copy_from_user(chip, argp, sizeof *chip))
3225 goto set_irqchip_out;
3227 if (!irqchip_in_kernel(kvm))
3228 goto set_irqchip_out;
3229 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
3231 goto set_irqchip_out;
3241 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
3244 if (!kvm->arch.vpit)
3246 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
3250 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
3257 if (copy_from_user(&u.ps, argp, sizeof u.ps))
3260 if (!kvm->arch.vpit)
3262 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
3268 case KVM_GET_PIT2: {
3270 if (!kvm->arch.vpit)
3272 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
3276 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
3281 case KVM_SET_PIT2: {
3283 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
3286 if (!kvm->arch.vpit)
3288 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
3294 case KVM_REINJECT_CONTROL: {
3295 struct kvm_reinject_control control;
3297 if (copy_from_user(&control, argp, sizeof(control)))
3299 r = kvm_vm_ioctl_reinject(kvm, &control);
3305 case KVM_XEN_HVM_CONFIG: {
3307 if (copy_from_user(&kvm->arch.xen_hvm_config, argp,
3308 sizeof(struct kvm_xen_hvm_config)))
3311 if (kvm->arch.xen_hvm_config.flags)
3316 case KVM_SET_CLOCK: {
3317 struct timespec now;
3318 struct kvm_clock_data user_ns;
3323 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
3332 now_ns = timespec_to_ns(&now);
3333 delta = user_ns.clock - now_ns;
3334 kvm->arch.kvmclock_offset = delta;
3337 case KVM_GET_CLOCK: {
3338 struct timespec now;
3339 struct kvm_clock_data user_ns;
3343 now_ns = timespec_to_ns(&now);
3344 user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
3348 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
3361 static void kvm_init_msr_list(void)
3366 /* skip the first msrs in the list. KVM-specific */
3367 for (i = j = KVM_SAVE_MSRS_BEGIN; i < ARRAY_SIZE(msrs_to_save); i++) {
3368 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
3371 msrs_to_save[j] = msrs_to_save[i];
3374 num_msrs_to_save = j;
3377 static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len,
3380 if (vcpu->arch.apic &&
3381 !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v))
3384 return kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
3387 static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v)
3389 if (vcpu->arch.apic &&
3390 !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v))
3393 return kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, addr, len, v);
3396 static void kvm_set_segment(struct kvm_vcpu *vcpu,
3397 struct kvm_segment *var, int seg)
3399 kvm_x86_ops->set_segment(vcpu, var, seg);
3402 void kvm_get_segment(struct kvm_vcpu *vcpu,
3403 struct kvm_segment *var, int seg)
3405 kvm_x86_ops->get_segment(vcpu, var, seg);
3408 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3410 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3411 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3414 gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3416 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3417 access |= PFERR_FETCH_MASK;
3418 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3421 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3423 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3424 access |= PFERR_WRITE_MASK;
3425 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, access, error);
3428 /* uses this to access any guest's mapped memory without checking CPL */
3429 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva, u32 *error)
3431 return vcpu->arch.mmu.gva_to_gpa(vcpu, gva, 0, error);
3434 static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes,
3435 struct kvm_vcpu *vcpu, u32 access,
3439 int r = X86EMUL_CONTINUE;
3442 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr, access, error);
3443 unsigned offset = addr & (PAGE_SIZE-1);
3444 unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset);
3447 if (gpa == UNMAPPED_GVA) {
3448 r = X86EMUL_PROPAGATE_FAULT;
3451 ret = kvm_read_guest(vcpu->kvm, gpa, data, toread);
3453 r = X86EMUL_IO_NEEDED;
3465 /* used for instruction fetching */
3466 static int kvm_fetch_guest_virt(gva_t addr, void *val, unsigned int bytes,
3467 struct kvm_vcpu *vcpu, u32 *error)
3469 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3470 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu,
3471 access | PFERR_FETCH_MASK, error);
3474 static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes,
3475 struct kvm_vcpu *vcpu, u32 *error)
3477 u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
3478 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
3482 static int kvm_read_guest_virt_system(gva_t addr, void *val, unsigned int bytes,
3483 struct kvm_vcpu *vcpu, u32 *error)
3485 return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, 0, error);
3488 static int kvm_write_guest_virt_system(gva_t addr, void *val,
3490 struct kvm_vcpu *vcpu,
3494 int r = X86EMUL_CONTINUE;
3497 gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr,
3498 PFERR_WRITE_MASK, error);
3499 unsigned offset = addr & (PAGE_SIZE-1);
3500 unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset);
3503 if (gpa == UNMAPPED_GVA) {
3504 r = X86EMUL_PROPAGATE_FAULT;
3507 ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite);
3509 r = X86EMUL_IO_NEEDED;
3521 static int emulator_read_emulated(unsigned long addr,
3524 unsigned int *error_code,
3525 struct kvm_vcpu *vcpu)
3529 if (vcpu->mmio_read_completed) {
3530 memcpy(val, vcpu->mmio_data, bytes);
3531 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,
3532 vcpu->mmio_phys_addr, *(u64 *)val);
3533 vcpu->mmio_read_completed = 0;
3534 return X86EMUL_CONTINUE;
3537 gpa = kvm_mmu_gva_to_gpa_read(vcpu, addr, error_code);
3539 if (gpa == UNMAPPED_GVA)
3540 return X86EMUL_PROPAGATE_FAULT;
3542 /* For APIC access vmexit */
3543 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3546 if (kvm_read_guest_virt(addr, val, bytes, vcpu, NULL)
3547 == X86EMUL_CONTINUE)
3548 return X86EMUL_CONTINUE;
3552 * Is this MMIO handled locally?
3554 if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) {
3555 trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val);
3556 return X86EMUL_CONTINUE;
3559 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);
3561 vcpu->mmio_needed = 1;
3562 vcpu->run->exit_reason = KVM_EXIT_MMIO;
3563 vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa;
3564 vcpu->run->mmio.len = vcpu->mmio_size = bytes;
3565 vcpu->run->mmio.is_write = vcpu->mmio_is_write = 0;
3567 return X86EMUL_IO_NEEDED;
3570 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
3571 const void *val, int bytes)
3575 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
3578 kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1);
3582 static int emulator_write_emulated_onepage(unsigned long addr,
3585 unsigned int *error_code,
3586 struct kvm_vcpu *vcpu)
3590 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, error_code);
3592 if (gpa == UNMAPPED_GVA)
3593 return X86EMUL_PROPAGATE_FAULT;
3595 /* For APIC access vmexit */
3596 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3599 if (emulator_write_phys(vcpu, gpa, val, bytes))
3600 return X86EMUL_CONTINUE;
3603 trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);
3605 * Is this MMIO handled locally?
3607 if (!vcpu_mmio_write(vcpu, gpa, bytes, val))
3608 return X86EMUL_CONTINUE;
3610 vcpu->mmio_needed = 1;
3611 vcpu->run->exit_reason = KVM_EXIT_MMIO;
3612 vcpu->run->mmio.phys_addr = vcpu->mmio_phys_addr = gpa;
3613 vcpu->run->mmio.len = vcpu->mmio_size = bytes;
3614 vcpu->run->mmio.is_write = vcpu->mmio_is_write = 1;
3615 memcpy(vcpu->run->mmio.data, val, bytes);
3617 return X86EMUL_CONTINUE;
3620 int emulator_write_emulated(unsigned long addr,
3623 unsigned int *error_code,
3624 struct kvm_vcpu *vcpu)
3626 /* Crossing a page boundary? */
3627 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
3630 now = -addr & ~PAGE_MASK;
3631 rc = emulator_write_emulated_onepage(addr, val, now, error_code,
3633 if (rc != X86EMUL_CONTINUE)
3639 return emulator_write_emulated_onepage(addr, val, bytes, error_code,
3643 #define CMPXCHG_TYPE(t, ptr, old, new) \
3644 (cmpxchg((t *)(ptr), *(t *)(old), *(t *)(new)) == *(t *)(old))
3646 #ifdef CONFIG_X86_64
3647 # define CMPXCHG64(ptr, old, new) CMPXCHG_TYPE(u64, ptr, old, new)
3649 # define CMPXCHG64(ptr, old, new) \
3650 (cmpxchg64((u64 *)(ptr), *(u64 *)(old), *(u64 *)(new)) == *(u64 *)(old))
3653 static int emulator_cmpxchg_emulated(unsigned long addr,
3657 unsigned int *error_code,
3658 struct kvm_vcpu *vcpu)
3665 /* guests cmpxchg8b have to be emulated atomically */
3666 if (bytes > 8 || (bytes & (bytes - 1)))
3669 gpa = kvm_mmu_gva_to_gpa_write(vcpu, addr, NULL);
3671 if (gpa == UNMAPPED_GVA ||
3672 (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
3675 if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK))
3678 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
3680 kaddr = kmap_atomic(page, KM_USER0);
3681 kaddr += offset_in_page(gpa);
3684 exchanged = CMPXCHG_TYPE(u8, kaddr, old, new);
3687 exchanged = CMPXCHG_TYPE(u16, kaddr, old, new);
3690 exchanged = CMPXCHG_TYPE(u32, kaddr, old, new);
3693 exchanged = CMPXCHG64(kaddr, old, new);
3698 kunmap_atomic(kaddr, KM_USER0);
3699 kvm_release_page_dirty(page);
3702 return X86EMUL_CMPXCHG_FAILED;
3704 kvm_mmu_pte_write(vcpu, gpa, new, bytes, 1);
3706 return X86EMUL_CONTINUE;
3709 printk_once(KERN_WARNING "kvm: emulating exchange as write\n");
3711 return emulator_write_emulated(addr, new, bytes, error_code, vcpu);
3714 static int kernel_pio(struct kvm_vcpu *vcpu, void *pd)
3716 /* TODO: String I/O for in kernel device */
3719 if (vcpu->arch.pio.in)
3720 r = kvm_io_bus_read(vcpu->kvm, KVM_PIO_BUS, vcpu->arch.pio.port,
3721 vcpu->arch.pio.size, pd);
3723 r = kvm_io_bus_write(vcpu->kvm, KVM_PIO_BUS,
3724 vcpu->arch.pio.port, vcpu->arch.pio.size,
3730 static int emulator_pio_in_emulated(int size, unsigned short port, void *val,
3731 unsigned int count, struct kvm_vcpu *vcpu)
3733 if (vcpu->arch.pio.count)
3736 trace_kvm_pio(1, port, size, 1);
3738 vcpu->arch.pio.port = port;
3739 vcpu->arch.pio.in = 1;
3740 vcpu->arch.pio.count = count;
3741 vcpu->arch.pio.size = size;
3743 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
3745 memcpy(val, vcpu->arch.pio_data, size * count);
3746 vcpu->arch.pio.count = 0;
3750 vcpu->run->exit_reason = KVM_EXIT_IO;
3751 vcpu->run->io.direction = KVM_EXIT_IO_IN;
3752 vcpu->run->io.size = size;
3753 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3754 vcpu->run->io.count = count;
3755 vcpu->run->io.port = port;
3760 static int emulator_pio_out_emulated(int size, unsigned short port,
3761 const void *val, unsigned int count,
3762 struct kvm_vcpu *vcpu)
3764 trace_kvm_pio(0, port, size, 1);
3766 vcpu->arch.pio.port = port;
3767 vcpu->arch.pio.in = 0;
3768 vcpu->arch.pio.count = count;
3769 vcpu->arch.pio.size = size;
3771 memcpy(vcpu->arch.pio_data, val, size * count);
3773 if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
3774 vcpu->arch.pio.count = 0;
3778 vcpu->run->exit_reason = KVM_EXIT_IO;
3779 vcpu->run->io.direction = KVM_EXIT_IO_OUT;
3780 vcpu->run->io.size = size;
3781 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3782 vcpu->run->io.count = count;
3783 vcpu->run->io.port = port;
3788 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
3790 return kvm_x86_ops->get_segment_base(vcpu, seg);
3793 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
3795 kvm_mmu_invlpg(vcpu, address);
3796 return X86EMUL_CONTINUE;
3799 int emulate_clts(struct kvm_vcpu *vcpu)
3801 kvm_x86_ops->set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
3802 kvm_x86_ops->fpu_activate(vcpu);
3803 return X86EMUL_CONTINUE;
3806 int emulator_get_dr(int dr, unsigned long *dest, struct kvm_vcpu *vcpu)
3808 return _kvm_get_dr(vcpu, dr, dest);
3811 int emulator_set_dr(int dr, unsigned long value, struct kvm_vcpu *vcpu)
3814 return __kvm_set_dr(vcpu, dr, value);
3817 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
3819 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
3822 static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu)
3824 unsigned long value;
3828 value = kvm_read_cr0(vcpu);
3831 value = vcpu->arch.cr2;
3834 value = vcpu->arch.cr3;
3837 value = kvm_read_cr4(vcpu);
3840 value = kvm_get_cr8(vcpu);
3843 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
3850 static int emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu)
3856 res = kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
3859 vcpu->arch.cr2 = val;
3862 res = kvm_set_cr3(vcpu, val);
3865 res = kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
3868 res = __kvm_set_cr8(vcpu, val & 0xfUL);
3871 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
3878 static int emulator_get_cpl(struct kvm_vcpu *vcpu)
3880 return kvm_x86_ops->get_cpl(vcpu);
3883 static void emulator_get_gdt(struct desc_ptr *dt, struct kvm_vcpu *vcpu)
3885 kvm_x86_ops->get_gdt(vcpu, dt);
3888 static unsigned long emulator_get_cached_segment_base(int seg,
3889 struct kvm_vcpu *vcpu)
3891 return get_segment_base(vcpu, seg);
3894 static bool emulator_get_cached_descriptor(struct desc_struct *desc, int seg,
3895 struct kvm_vcpu *vcpu)
3897 struct kvm_segment var;
3899 kvm_get_segment(vcpu, &var, seg);
3906 set_desc_limit(desc, var.limit);
3907 set_desc_base(desc, (unsigned long)var.base);
3908 desc->type = var.type;
3910 desc->dpl = var.dpl;
3911 desc->p = var.present;
3912 desc->avl = var.avl;
3920 static void emulator_set_cached_descriptor(struct desc_struct *desc, int seg,
3921 struct kvm_vcpu *vcpu)
3923 struct kvm_segment var;
3925 /* needed to preserve selector */
3926 kvm_get_segment(vcpu, &var, seg);
3928 var.base = get_desc_base(desc);
3929 var.limit = get_desc_limit(desc);
3931 var.limit = (var.limit << 12) | 0xfff;
3932 var.type = desc->type;
3933 var.present = desc->p;
3934 var.dpl = desc->dpl;
3939 var.avl = desc->avl;
3940 var.present = desc->p;
3941 var.unusable = !var.present;
3944 kvm_set_segment(vcpu, &var, seg);
3948 static u16 emulator_get_segment_selector(int seg, struct kvm_vcpu *vcpu)
3950 struct kvm_segment kvm_seg;
3952 kvm_get_segment(vcpu, &kvm_seg, seg);
3953 return kvm_seg.selector;
3956 static void emulator_set_segment_selector(u16 sel, int seg,
3957 struct kvm_vcpu *vcpu)
3959 struct kvm_segment kvm_seg;
3961 kvm_get_segment(vcpu, &kvm_seg, seg);
3962 kvm_seg.selector = sel;
3963 kvm_set_segment(vcpu, &kvm_seg, seg);
3966 static struct x86_emulate_ops emulate_ops = {
3967 .read_std = kvm_read_guest_virt_system,
3968 .write_std = kvm_write_guest_virt_system,
3969 .fetch = kvm_fetch_guest_virt,
3970 .read_emulated = emulator_read_emulated,
3971 .write_emulated = emulator_write_emulated,
3972 .cmpxchg_emulated = emulator_cmpxchg_emulated,
3973 .pio_in_emulated = emulator_pio_in_emulated,
3974 .pio_out_emulated = emulator_pio_out_emulated,
3975 .get_cached_descriptor = emulator_get_cached_descriptor,
3976 .set_cached_descriptor = emulator_set_cached_descriptor,
3977 .get_segment_selector = emulator_get_segment_selector,
3978 .set_segment_selector = emulator_set_segment_selector,
3979 .get_cached_segment_base = emulator_get_cached_segment_base,
3980 .get_gdt = emulator_get_gdt,
3981 .get_cr = emulator_get_cr,
3982 .set_cr = emulator_set_cr,
3983 .cpl = emulator_get_cpl,
3984 .get_dr = emulator_get_dr,
3985 .set_dr = emulator_set_dr,
3986 .set_msr = kvm_set_msr,
3987 .get_msr = kvm_get_msr,
3990 static void cache_all_regs(struct kvm_vcpu *vcpu)
3992 kvm_register_read(vcpu, VCPU_REGS_RAX);
3993 kvm_register_read(vcpu, VCPU_REGS_RSP);
3994 kvm_register_read(vcpu, VCPU_REGS_RIP);
3995 vcpu->arch.regs_dirty = ~0;
3998 static void toggle_interruptibility(struct kvm_vcpu *vcpu, u32 mask)
4000 u32 int_shadow = kvm_x86_ops->get_interrupt_shadow(vcpu, mask);
4002 * an sti; sti; sequence only disable interrupts for the first
4003 * instruction. So, if the last instruction, be it emulated or
4004 * not, left the system with the INT_STI flag enabled, it
4005 * means that the last instruction is an sti. We should not
4006 * leave the flag on in this case. The same goes for mov ss
4008 if (!(int_shadow & mask))
4009 kvm_x86_ops->set_interrupt_shadow(vcpu, mask);
4012 static void inject_emulated_exception(struct kvm_vcpu *vcpu)
4014 struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
4015 if (ctxt->exception == PF_VECTOR)
4016 kvm_inject_page_fault(vcpu, ctxt->cr2, ctxt->error_code);
4017 else if (ctxt->error_code_valid)
4018 kvm_queue_exception_e(vcpu, ctxt->exception, ctxt->error_code);
4020 kvm_queue_exception(vcpu, ctxt->exception);
4023 static int handle_emulation_failure(struct kvm_vcpu *vcpu)
4025 ++vcpu->stat.insn_emulation_fail;
4026 trace_kvm_emulate_insn_failed(vcpu);
4027 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4028 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
4029 vcpu->run->internal.ndata = 0;
4030 kvm_queue_exception(vcpu, UD_VECTOR);
4031 return EMULATE_FAIL;
4034 int emulate_instruction(struct kvm_vcpu *vcpu,
4040 struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode;
4042 kvm_clear_exception_queue(vcpu);
4043 vcpu->arch.mmio_fault_cr2 = cr2;
4045 * TODO: fix emulate.c to use guest_read/write_register
4046 * instead of direct ->regs accesses, can save hundred cycles
4047 * on Intel for instructions that don't read/change RSP, for
4050 cache_all_regs(vcpu);
4052 if (!(emulation_type & EMULTYPE_NO_DECODE)) {
4054 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4056 vcpu->arch.emulate_ctxt.vcpu = vcpu;
4057 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
4058 vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
4059 vcpu->arch.emulate_ctxt.mode =
4060 (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
4061 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
4062 ? X86EMUL_MODE_VM86 : cs_l
4063 ? X86EMUL_MODE_PROT64 : cs_db
4064 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
4065 memset(c, 0, sizeof(struct decode_cache));
4066 memcpy(c->regs, vcpu->arch.regs, sizeof c->regs);
4067 vcpu->arch.emulate_ctxt.interruptibility = 0;
4068 vcpu->arch.emulate_ctxt.exception = -1;
4070 r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
4071 trace_kvm_emulate_insn_start(vcpu);
4073 /* Only allow emulation of specific instructions on #UD
4074 * (namely VMMCALL, sysenter, sysexit, syscall)*/
4075 if (emulation_type & EMULTYPE_TRAP_UD) {
4077 return EMULATE_FAIL;
4079 case 0x01: /* VMMCALL */
4080 if (c->modrm_mod != 3 || c->modrm_rm != 1)
4081 return EMULATE_FAIL;
4083 case 0x34: /* sysenter */
4084 case 0x35: /* sysexit */
4085 if (c->modrm_mod != 0 || c->modrm_rm != 0)
4086 return EMULATE_FAIL;
4088 case 0x05: /* syscall */
4089 if (c->modrm_mod != 0 || c->modrm_rm != 0)
4090 return EMULATE_FAIL;
4093 return EMULATE_FAIL;
4096 if (!(c->modrm_reg == 0 || c->modrm_reg == 3))
4097 return EMULATE_FAIL;
4100 ++vcpu->stat.insn_emulation;
4102 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
4103 return EMULATE_DONE;
4104 if (emulation_type & EMULTYPE_SKIP)
4105 return EMULATE_FAIL;
4106 return handle_emulation_failure(vcpu);
4110 if (emulation_type & EMULTYPE_SKIP) {
4111 kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip);
4112 return EMULATE_DONE;
4115 /* this is needed for vmware backdor interface to work since it
4116 changes registers values during IO operation */
4117 memcpy(c->regs, vcpu->arch.regs, sizeof c->regs);
4120 r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops);
4122 if (r) { /* emulation failed */
4124 * if emulation was due to access to shadowed page table
4125 * and it failed try to unshadow page and re-entetr the
4126 * guest to let CPU execute the instruction.
4128 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
4129 return EMULATE_DONE;
4131 return handle_emulation_failure(vcpu);
4134 toggle_interruptibility(vcpu, vcpu->arch.emulate_ctxt.interruptibility);
4135 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
4136 memcpy(vcpu->arch.regs, c->regs, sizeof c->regs);
4137 kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip);
4139 if (vcpu->arch.emulate_ctxt.exception >= 0) {
4140 inject_emulated_exception(vcpu);
4141 return EMULATE_DONE;
4144 if (vcpu->arch.pio.count) {
4145 if (!vcpu->arch.pio.in)
4146 vcpu->arch.pio.count = 0;
4147 return EMULATE_DO_MMIO;
4150 if (vcpu->mmio_needed) {
4151 if (vcpu->mmio_is_write)
4152 vcpu->mmio_needed = 0;
4153 return EMULATE_DO_MMIO;
4156 if (vcpu->arch.emulate_ctxt.restart)
4159 return EMULATE_DONE;
4161 EXPORT_SYMBOL_GPL(emulate_instruction);
4163 int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
4165 unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
4166 int ret = emulator_pio_out_emulated(size, port, &val, 1, vcpu);
4167 /* do not return to emulator after return from userspace */
4168 vcpu->arch.pio.count = 0;
4171 EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
4173 static void bounce_off(void *info)
4178 static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
4181 struct cpufreq_freqs *freq = data;
4183 struct kvm_vcpu *vcpu;
4184 int i, send_ipi = 0;
4186 if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
4188 if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
4190 per_cpu(cpu_tsc_khz, freq->cpu) = freq->new;
4192 spin_lock(&kvm_lock);
4193 list_for_each_entry(kvm, &vm_list, vm_list) {
4194 kvm_for_each_vcpu(i, vcpu, kvm) {
4195 if (vcpu->cpu != freq->cpu)
4197 if (!kvm_request_guest_time_update(vcpu))
4199 if (vcpu->cpu != smp_processor_id())
4203 spin_unlock(&kvm_lock);
4205 if (freq->old < freq->new && send_ipi) {
4207 * We upscale the frequency. Must make the guest
4208 * doesn't see old kvmclock values while running with
4209 * the new frequency, otherwise we risk the guest sees
4210 * time go backwards.
4212 * In case we update the frequency for another cpu
4213 * (which might be in guest context) send an interrupt
4214 * to kick the cpu out of guest context. Next time
4215 * guest context is entered kvmclock will be updated,
4216 * so the guest will not see stale values.
4218 smp_call_function_single(freq->cpu, bounce_off, NULL, 1);
4223 static struct notifier_block kvmclock_cpufreq_notifier_block = {
4224 .notifier_call = kvmclock_cpufreq_notifier
4227 static void kvm_timer_init(void)
4231 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
4232 cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
4233 CPUFREQ_TRANSITION_NOTIFIER);
4234 for_each_online_cpu(cpu) {
4235 unsigned long khz = cpufreq_get(cpu);
4238 per_cpu(cpu_tsc_khz, cpu) = khz;
4241 for_each_possible_cpu(cpu)
4242 per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
4246 static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
4248 static int kvm_is_in_guest(void)
4250 return percpu_read(current_vcpu) != NULL;
4253 static int kvm_is_user_mode(void)
4257 if (percpu_read(current_vcpu))
4258 user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
4260 return user_mode != 0;
4263 static unsigned long kvm_get_guest_ip(void)
4265 unsigned long ip = 0;
4267 if (percpu_read(current_vcpu))
4268 ip = kvm_rip_read(percpu_read(current_vcpu));
4273 static struct perf_guest_info_callbacks kvm_guest_cbs = {
4274 .is_in_guest = kvm_is_in_guest,
4275 .is_user_mode = kvm_is_user_mode,
4276 .get_guest_ip = kvm_get_guest_ip,
4279 void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
4281 percpu_write(current_vcpu, vcpu);
4283 EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
4285 void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
4287 percpu_write(current_vcpu, NULL);
4289 EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
4291 int kvm_arch_init(void *opaque)
4294 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
4297 printk(KERN_ERR "kvm: already loaded the other module\n");
4302 if (!ops->cpu_has_kvm_support()) {
4303 printk(KERN_ERR "kvm: no hardware support\n");
4307 if (ops->disabled_by_bios()) {
4308 printk(KERN_ERR "kvm: disabled by bios\n");
4313 r = kvm_mmu_module_init();
4317 kvm_init_msr_list();
4320 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
4321 kvm_mmu_set_base_ptes(PT_PRESENT_MASK);
4322 kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
4323 PT_DIRTY_MASK, PT64_NX_MASK, 0);
4327 perf_register_guest_info_callbacks(&kvm_guest_cbs);
4330 host_xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
4338 void kvm_arch_exit(void)
4340 perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
4342 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
4343 cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
4344 CPUFREQ_TRANSITION_NOTIFIER);
4346 kvm_mmu_module_exit();
4349 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
4351 ++vcpu->stat.halt_exits;
4352 if (irqchip_in_kernel(vcpu->kvm)) {
4353 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
4356 vcpu->run->exit_reason = KVM_EXIT_HLT;
4360 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
4362 static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0,
4365 if (is_long_mode(vcpu))
4368 return a0 | ((gpa_t)a1 << 32);
4371 int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
4373 u64 param, ingpa, outgpa, ret;
4374 uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
4375 bool fast, longmode;
4379 * hypercall generates UD from non zero cpl and real mode
4382 if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
4383 kvm_queue_exception(vcpu, UD_VECTOR);
4387 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
4388 longmode = is_long_mode(vcpu) && cs_l == 1;
4391 param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
4392 (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
4393 ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
4394 (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
4395 outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
4396 (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
4398 #ifdef CONFIG_X86_64
4400 param = kvm_register_read(vcpu, VCPU_REGS_RCX);
4401 ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
4402 outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
4406 code = param & 0xffff;
4407 fast = (param >> 16) & 0x1;
4408 rep_cnt = (param >> 32) & 0xfff;
4409 rep_idx = (param >> 48) & 0xfff;
4411 trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
4414 case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
4415 kvm_vcpu_on_spin(vcpu);
4418 res = HV_STATUS_INVALID_HYPERCALL_CODE;
4422 ret = res | (((u64)rep_done & 0xfff) << 32);
4424 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
4426 kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
4427 kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
4433 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
4435 unsigned long nr, a0, a1, a2, a3, ret;
4438 if (kvm_hv_hypercall_enabled(vcpu->kvm))
4439 return kvm_hv_hypercall(vcpu);
4441 nr = kvm_register_read(vcpu, VCPU_REGS_RAX);
4442 a0 = kvm_register_read(vcpu, VCPU_REGS_RBX);
4443 a1 = kvm_register_read(vcpu, VCPU_REGS_RCX);
4444 a2 = kvm_register_read(vcpu, VCPU_REGS_RDX);
4445 a3 = kvm_register_read(vcpu, VCPU_REGS_RSI);
4447 trace_kvm_hypercall(nr, a0, a1, a2, a3);
4449 if (!is_long_mode(vcpu)) {
4457 if (kvm_x86_ops->get_cpl(vcpu) != 0) {
4463 case KVM_HC_VAPIC_POLL_IRQ:
4467 r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret);
4474 kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
4475 ++vcpu->stat.hypercalls;
4478 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
4480 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
4482 char instruction[3];
4483 unsigned long rip = kvm_rip_read(vcpu);
4486 * Blow out the MMU to ensure that no other VCPU has an active mapping
4487 * to ensure that the updated hypercall appears atomically across all
4490 kvm_mmu_zap_all(vcpu->kvm);
4492 kvm_x86_ops->patch_hypercall(vcpu, instruction);
4494 return emulator_write_emulated(rip, instruction, 3, NULL, vcpu);
4497 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
4499 struct desc_ptr dt = { limit, base };
4501 kvm_x86_ops->set_gdt(vcpu, &dt);
4504 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
4506 struct desc_ptr dt = { limit, base };
4508 kvm_x86_ops->set_idt(vcpu, &dt);
4511 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
4513 struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];
4514 int j, nent = vcpu->arch.cpuid_nent;
4516 e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT;
4517 /* when no next entry is found, the current entry[i] is reselected */
4518 for (j = i + 1; ; j = (j + 1) % nent) {
4519 struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j];
4520 if (ej->function == e->function) {
4521 ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT;
4525 return 0; /* silence gcc, even though control never reaches here */
4528 /* find an entry with matching function, matching index (if needed), and that
4529 * should be read next (if it's stateful) */
4530 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e,
4531 u32 function, u32 index)
4533 if (e->function != function)
4535 if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index)
4537 if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) &&
4538 !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT))
4543 struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
4544 u32 function, u32 index)
4547 struct kvm_cpuid_entry2 *best = NULL;
4549 for (i = 0; i < vcpu->arch.cpuid_nent; ++i) {
4550 struct kvm_cpuid_entry2 *e;
4552 e = &vcpu->arch.cpuid_entries[i];
4553 if (is_matching_cpuid_entry(e, function, index)) {
4554 if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC)
4555 move_to_next_stateful_cpuid_entry(vcpu, i);
4560 * Both basic or both extended?
4562 if (((e->function ^ function) & 0x80000000) == 0)
4563 if (!best || e->function > best->function)
4568 EXPORT_SYMBOL_GPL(kvm_find_cpuid_entry);
4570 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu)
4572 struct kvm_cpuid_entry2 *best;
4574 best = kvm_find_cpuid_entry(vcpu, 0x80000000, 0);
4575 if (!best || best->eax < 0x80000008)
4577 best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0);
4579 return best->eax & 0xff;
4584 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
4586 u32 function, index;
4587 struct kvm_cpuid_entry2 *best;
4589 function = kvm_register_read(vcpu, VCPU_REGS_RAX);
4590 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
4591 kvm_register_write(vcpu, VCPU_REGS_RAX, 0);
4592 kvm_register_write(vcpu, VCPU_REGS_RBX, 0);
4593 kvm_register_write(vcpu, VCPU_REGS_RCX, 0);
4594 kvm_register_write(vcpu, VCPU_REGS_RDX, 0);
4595 best = kvm_find_cpuid_entry(vcpu, function, index);
4597 kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax);
4598 kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx);
4599 kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx);
4600 kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx);
4602 kvm_x86_ops->skip_emulated_instruction(vcpu);
4603 trace_kvm_cpuid(function,
4604 kvm_register_read(vcpu, VCPU_REGS_RAX),
4605 kvm_register_read(vcpu, VCPU_REGS_RBX),
4606 kvm_register_read(vcpu, VCPU_REGS_RCX),
4607 kvm_register_read(vcpu, VCPU_REGS_RDX));
4609 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
4612 * Check if userspace requested an interrupt window, and that the
4613 * interrupt window is open.
4615 * No need to exit to userspace if we already have an interrupt queued.
4617 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu)
4619 return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
4620 vcpu->run->request_interrupt_window &&
4621 kvm_arch_interrupt_allowed(vcpu));
4624 static void post_kvm_run_save(struct kvm_vcpu *vcpu)
4626 struct kvm_run *kvm_run = vcpu->run;
4628 kvm_run->if_flag = (kvm_get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
4629 kvm_run->cr8 = kvm_get_cr8(vcpu);
4630 kvm_run->apic_base = kvm_get_apic_base(vcpu);
4631 if (irqchip_in_kernel(vcpu->kvm))
4632 kvm_run->ready_for_interrupt_injection = 1;
4634 kvm_run->ready_for_interrupt_injection =
4635 kvm_arch_interrupt_allowed(vcpu) &&
4636 !kvm_cpu_has_interrupt(vcpu) &&
4637 !kvm_event_needs_reinjection(vcpu);
4640 static void vapic_enter(struct kvm_vcpu *vcpu)
4642 struct kvm_lapic *apic = vcpu->arch.apic;
4645 if (!apic || !apic->vapic_addr)
4648 page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
4650 vcpu->arch.apic->vapic_page = page;
4653 static void vapic_exit(struct kvm_vcpu *vcpu)
4655 struct kvm_lapic *apic = vcpu->arch.apic;
4658 if (!apic || !apic->vapic_addr)
4661 idx = srcu_read_lock(&vcpu->kvm->srcu);
4662 kvm_release_page_dirty(apic->vapic_page);
4663 mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
4664 srcu_read_unlock(&vcpu->kvm->srcu, idx);
4667 static void update_cr8_intercept(struct kvm_vcpu *vcpu)
4671 if (!kvm_x86_ops->update_cr8_intercept)
4674 if (!vcpu->arch.apic)
4677 if (!vcpu->arch.apic->vapic_addr)
4678 max_irr = kvm_lapic_find_highest_irr(vcpu);
4685 tpr = kvm_lapic_get_cr8(vcpu);
4687 kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr);
4690 static void inject_pending_event(struct kvm_vcpu *vcpu)
4692 /* try to reinject previous events if any */
4693 if (vcpu->arch.exception.pending) {
4694 trace_kvm_inj_exception(vcpu->arch.exception.nr,
4695 vcpu->arch.exception.has_error_code,
4696 vcpu->arch.exception.error_code);
4697 kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr,
4698 vcpu->arch.exception.has_error_code,
4699 vcpu->arch.exception.error_code,
4700 vcpu->arch.exception.reinject);
4704 if (vcpu->arch.nmi_injected) {
4705 kvm_x86_ops->set_nmi(vcpu);
4709 if (vcpu->arch.interrupt.pending) {
4710 kvm_x86_ops->set_irq(vcpu);
4714 /* try to inject new event if pending */
4715 if (vcpu->arch.nmi_pending) {
4716 if (kvm_x86_ops->nmi_allowed(vcpu)) {
4717 vcpu->arch.nmi_pending = false;
4718 vcpu->arch.nmi_injected = true;
4719 kvm_x86_ops->set_nmi(vcpu);
4721 } else if (kvm_cpu_has_interrupt(vcpu)) {
4722 if (kvm_x86_ops->interrupt_allowed(vcpu)) {
4723 kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu),
4725 kvm_x86_ops->set_irq(vcpu);
4730 static void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu)
4732 if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE) &&
4733 !vcpu->guest_xcr0_loaded) {
4734 /* kvm_set_xcr() also depends on this */
4735 xsetbv(XCR_XFEATURE_ENABLED_MASK, vcpu->arch.xcr0);
4736 vcpu->guest_xcr0_loaded = 1;
4740 static void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu)
4742 if (vcpu->guest_xcr0_loaded) {
4743 if (vcpu->arch.xcr0 != host_xcr0)
4744 xsetbv(XCR_XFEATURE_ENABLED_MASK, host_xcr0);
4745 vcpu->guest_xcr0_loaded = 0;
4749 static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
4752 bool req_int_win = !irqchip_in_kernel(vcpu->kvm) &&
4753 vcpu->run->request_interrupt_window;
4756 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests))
4757 kvm_mmu_unload(vcpu);
4759 r = kvm_mmu_reload(vcpu);
4763 if (vcpu->requests) {
4764 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests))
4765 __kvm_migrate_timers(vcpu);
4766 if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests))
4767 kvm_write_guest_time(vcpu);
4768 if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests))
4769 kvm_mmu_sync_roots(vcpu);
4770 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
4771 kvm_x86_ops->tlb_flush(vcpu);
4772 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS,
4774 vcpu->run->exit_reason = KVM_EXIT_TPR_ACCESS;
4778 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) {
4779 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
4783 if (test_and_clear_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests)) {
4784 vcpu->fpu_active = 0;
4785 kvm_x86_ops->fpu_deactivate(vcpu);
4791 kvm_x86_ops->prepare_guest_switch(vcpu);
4792 if (vcpu->fpu_active)
4793 kvm_load_guest_fpu(vcpu);
4794 kvm_load_guest_xcr0(vcpu);
4796 atomic_set(&vcpu->guest_mode, 1);
4799 local_irq_disable();
4801 if (!atomic_read(&vcpu->guest_mode) || vcpu->requests
4802 || need_resched() || signal_pending(current)) {
4803 atomic_set(&vcpu->guest_mode, 0);
4811 inject_pending_event(vcpu);
4813 /* enable NMI/IRQ window open exits if needed */
4814 if (vcpu->arch.nmi_pending)
4815 kvm_x86_ops->enable_nmi_window(vcpu);
4816 else if (kvm_cpu_has_interrupt(vcpu) || req_int_win)
4817 kvm_x86_ops->enable_irq_window(vcpu);
4819 if (kvm_lapic_enabled(vcpu)) {
4820 update_cr8_intercept(vcpu);
4821 kvm_lapic_sync_to_vapic(vcpu);
4824 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4828 if (unlikely(vcpu->arch.switch_db_regs)) {
4830 set_debugreg(vcpu->arch.eff_db[0], 0);
4831 set_debugreg(vcpu->arch.eff_db[1], 1);
4832 set_debugreg(vcpu->arch.eff_db[2], 2);
4833 set_debugreg(vcpu->arch.eff_db[3], 3);
4836 trace_kvm_entry(vcpu->vcpu_id);
4837 kvm_x86_ops->run(vcpu);
4840 * If the guest has used debug registers, at least dr7
4841 * will be disabled while returning to the host.
4842 * If we don't have active breakpoints in the host, we don't
4843 * care about the messed up debug address registers. But if
4844 * we have some of them active, restore the old state.
4846 if (hw_breakpoint_active())
4847 hw_breakpoint_restore();
4849 atomic_set(&vcpu->guest_mode, 0);
4856 * We must have an instruction between local_irq_enable() and
4857 * kvm_guest_exit(), so the timer interrupt isn't delayed by
4858 * the interrupt shadow. The stat.exits increment will do nicely.
4859 * But we need to prevent reordering, hence this barrier():
4867 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4870 * Profile KVM exit RIPs:
4872 if (unlikely(prof_on == KVM_PROFILING)) {
4873 unsigned long rip = kvm_rip_read(vcpu);
4874 profile_hit(KVM_PROFILING, (void *)rip);
4878 kvm_lapic_sync_from_vapic(vcpu);
4880 r = kvm_x86_ops->handle_exit(vcpu);
4886 static int __vcpu_run(struct kvm_vcpu *vcpu)
4889 struct kvm *kvm = vcpu->kvm;
4891 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) {
4892 pr_debug("vcpu %d received sipi with vector # %x\n",
4893 vcpu->vcpu_id, vcpu->arch.sipi_vector);
4894 kvm_lapic_reset(vcpu);
4895 r = kvm_arch_vcpu_reset(vcpu);
4898 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
4901 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4906 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
4907 r = vcpu_enter_guest(vcpu);
4909 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4910 kvm_vcpu_block(vcpu);
4911 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4912 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
4914 switch(vcpu->arch.mp_state) {
4915 case KVM_MP_STATE_HALTED:
4916 vcpu->arch.mp_state =
4917 KVM_MP_STATE_RUNNABLE;
4918 case KVM_MP_STATE_RUNNABLE:
4920 case KVM_MP_STATE_SIPI_RECEIVED:
4931 clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
4932 if (kvm_cpu_has_pending_timer(vcpu))
4933 kvm_inject_pending_timer_irqs(vcpu);
4935 if (dm_request_for_irq_injection(vcpu)) {
4937 vcpu->run->exit_reason = KVM_EXIT_INTR;
4938 ++vcpu->stat.request_irq_exits;
4940 if (signal_pending(current)) {
4942 vcpu->run->exit_reason = KVM_EXIT_INTR;
4943 ++vcpu->stat.signal_exits;
4945 if (need_resched()) {
4946 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4948 vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
4952 srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
4959 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
4964 if (vcpu->sigset_active)
4965 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
4967 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
4968 kvm_vcpu_block(vcpu);
4969 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
4974 /* re-sync apic's tpr */
4975 if (!irqchip_in_kernel(vcpu->kvm))
4976 kvm_set_cr8(vcpu, kvm_run->cr8);
4978 if (vcpu->arch.pio.count || vcpu->mmio_needed ||
4979 vcpu->arch.emulate_ctxt.restart) {
4980 if (vcpu->mmio_needed) {
4981 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
4982 vcpu->mmio_read_completed = 1;
4983 vcpu->mmio_needed = 0;
4985 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4986 r = emulate_instruction(vcpu, 0, 0, EMULTYPE_NO_DECODE);
4987 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
4988 if (r != EMULATE_DONE) {
4993 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL)
4994 kvm_register_write(vcpu, VCPU_REGS_RAX,
4995 kvm_run->hypercall.ret);
4997 r = __vcpu_run(vcpu);
5000 post_kvm_run_save(vcpu);
5001 if (vcpu->sigset_active)
5002 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
5007 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5009 regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX);
5010 regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX);
5011 regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX);
5012 regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX);
5013 regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI);
5014 regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI);
5015 regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
5016 regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP);
5017 #ifdef CONFIG_X86_64
5018 regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8);
5019 regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9);
5020 regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10);
5021 regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11);
5022 regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12);
5023 regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13);
5024 regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14);
5025 regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15);
5028 regs->rip = kvm_rip_read(vcpu);
5029 regs->rflags = kvm_get_rflags(vcpu);
5034 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
5036 kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax);
5037 kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx);
5038 kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx);
5039 kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx);
5040 kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi);
5041 kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi);
5042 kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp);
5043 kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp);
5044 #ifdef CONFIG_X86_64
5045 kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8);
5046 kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9);
5047 kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10);
5048 kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11);
5049 kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12);
5050 kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13);
5051 kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14);
5052 kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15);
5055 kvm_rip_write(vcpu, regs->rip);
5056 kvm_set_rflags(vcpu, regs->rflags);
5058 vcpu->arch.exception.pending = false;
5063 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
5065 struct kvm_segment cs;
5067 kvm_get_segment(vcpu, &cs, VCPU_SREG_CS);
5071 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
5073 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
5074 struct kvm_sregs *sregs)
5078 kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5079 kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5080 kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5081 kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5082 kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5083 kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
5085 kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5086 kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
5088 kvm_x86_ops->get_idt(vcpu, &dt);
5089 sregs->idt.limit = dt.size;
5090 sregs->idt.base = dt.address;
5091 kvm_x86_ops->get_gdt(vcpu, &dt);
5092 sregs->gdt.limit = dt.size;
5093 sregs->gdt.base = dt.address;
5095 sregs->cr0 = kvm_read_cr0(vcpu);
5096 sregs->cr2 = vcpu->arch.cr2;
5097 sregs->cr3 = vcpu->arch.cr3;
5098 sregs->cr4 = kvm_read_cr4(vcpu);
5099 sregs->cr8 = kvm_get_cr8(vcpu);
5100 sregs->efer = vcpu->arch.efer;
5101 sregs->apic_base = kvm_get_apic_base(vcpu);
5103 memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap);
5105 if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft)
5106 set_bit(vcpu->arch.interrupt.nr,
5107 (unsigned long *)sregs->interrupt_bitmap);
5112 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
5113 struct kvm_mp_state *mp_state)
5115 mp_state->mp_state = vcpu->arch.mp_state;
5119 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
5120 struct kvm_mp_state *mp_state)
5122 vcpu->arch.mp_state = mp_state->mp_state;
5126 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason,
5127 bool has_error_code, u32 error_code)
5129 struct decode_cache *c = &vcpu->arch.emulate_ctxt.decode;
5130 int cs_db, cs_l, ret;
5131 cache_all_regs(vcpu);
5133 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
5135 vcpu->arch.emulate_ctxt.vcpu = vcpu;
5136 vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
5137 vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu);
5138 vcpu->arch.emulate_ctxt.mode =
5139 (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL :
5140 (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)
5141 ? X86EMUL_MODE_VM86 : cs_l
5142 ? X86EMUL_MODE_PROT64 : cs_db
5143 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
5144 memset(c, 0, sizeof(struct decode_cache));
5145 memcpy(c->regs, vcpu->arch.regs, sizeof c->regs);
5147 ret = emulator_task_switch(&vcpu->arch.emulate_ctxt, &emulate_ops,
5148 tss_selector, reason, has_error_code,
5152 return EMULATE_FAIL;
5154 memcpy(vcpu->arch.regs, c->regs, sizeof c->regs);
5155 kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.eip);
5156 kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags);
5157 return EMULATE_DONE;
5159 EXPORT_SYMBOL_GPL(kvm_task_switch);
5161 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
5162 struct kvm_sregs *sregs)
5164 int mmu_reset_needed = 0;
5165 int pending_vec, max_bits;
5168 dt.size = sregs->idt.limit;
5169 dt.address = sregs->idt.base;
5170 kvm_x86_ops->set_idt(vcpu, &dt);
5171 dt.size = sregs->gdt.limit;
5172 dt.address = sregs->gdt.base;
5173 kvm_x86_ops->set_gdt(vcpu, &dt);
5175 vcpu->arch.cr2 = sregs->cr2;
5176 mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3;
5177 vcpu->arch.cr3 = sregs->cr3;
5179 kvm_set_cr8(vcpu, sregs->cr8);
5181 mmu_reset_needed |= vcpu->arch.efer != sregs->efer;
5182 kvm_x86_ops->set_efer(vcpu, sregs->efer);
5183 kvm_set_apic_base(vcpu, sregs->apic_base);
5185 mmu_reset_needed |= kvm_read_cr0(vcpu) != sregs->cr0;
5186 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
5187 vcpu->arch.cr0 = sregs->cr0;
5189 mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4;
5190 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
5191 if (!is_long_mode(vcpu) && is_pae(vcpu)) {
5192 load_pdptrs(vcpu, vcpu->arch.cr3);
5193 mmu_reset_needed = 1;
5196 if (mmu_reset_needed)
5197 kvm_mmu_reset_context(vcpu);
5199 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
5200 pending_vec = find_first_bit(
5201 (const unsigned long *)sregs->interrupt_bitmap, max_bits);
5202 if (pending_vec < max_bits) {
5203 kvm_queue_interrupt(vcpu, pending_vec, false);
5204 pr_debug("Set back pending irq %d\n", pending_vec);
5205 if (irqchip_in_kernel(vcpu->kvm))
5206 kvm_pic_clear_isr_ack(vcpu->kvm);
5209 kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
5210 kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
5211 kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
5212 kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
5213 kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
5214 kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
5216 kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
5217 kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
5219 update_cr8_intercept(vcpu);
5221 /* Older userspace won't unhalt the vcpu on reset. */
5222 if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 &&
5223 sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 &&
5225 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5230 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
5231 struct kvm_guest_debug *dbg)
5233 unsigned long rflags;
5236 if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
5238 if (vcpu->arch.exception.pending)
5240 if (dbg->control & KVM_GUESTDBG_INJECT_DB)
5241 kvm_queue_exception(vcpu, DB_VECTOR);
5243 kvm_queue_exception(vcpu, BP_VECTOR);
5247 * Read rflags as long as potentially injected trace flags are still
5250 rflags = kvm_get_rflags(vcpu);
5252 vcpu->guest_debug = dbg->control;
5253 if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE))
5254 vcpu->guest_debug = 0;
5256 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
5257 for (i = 0; i < KVM_NR_DB_REGS; ++i)
5258 vcpu->arch.eff_db[i] = dbg->arch.debugreg[i];
5259 vcpu->arch.switch_db_regs =
5260 (dbg->arch.debugreg[7] & DR7_BP_EN_MASK);
5262 for (i = 0; i < KVM_NR_DB_REGS; i++)
5263 vcpu->arch.eff_db[i] = vcpu->arch.db[i];
5264 vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK);
5267 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5268 vcpu->arch.singlestep_rip = kvm_rip_read(vcpu) +
5269 get_segment_base(vcpu, VCPU_SREG_CS);
5272 * Trigger an rflags update that will inject or remove the trace
5275 kvm_set_rflags(vcpu, rflags);
5277 kvm_x86_ops->set_guest_debug(vcpu, dbg);
5287 * Translate a guest virtual address to a guest physical address.
5289 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
5290 struct kvm_translation *tr)
5292 unsigned long vaddr = tr->linear_address;
5296 idx = srcu_read_lock(&vcpu->kvm->srcu);
5297 gpa = kvm_mmu_gva_to_gpa_system(vcpu, vaddr, NULL);
5298 srcu_read_unlock(&vcpu->kvm->srcu, idx);
5299 tr->physical_address = gpa;
5300 tr->valid = gpa != UNMAPPED_GVA;
5307 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5309 struct i387_fxsave_struct *fxsave =
5310 &vcpu->arch.guest_fpu.state->fxsave;
5312 memcpy(fpu->fpr, fxsave->st_space, 128);
5313 fpu->fcw = fxsave->cwd;
5314 fpu->fsw = fxsave->swd;
5315 fpu->ftwx = fxsave->twd;
5316 fpu->last_opcode = fxsave->fop;
5317 fpu->last_ip = fxsave->rip;
5318 fpu->last_dp = fxsave->rdp;
5319 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
5324 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
5326 struct i387_fxsave_struct *fxsave =
5327 &vcpu->arch.guest_fpu.state->fxsave;
5329 memcpy(fxsave->st_space, fpu->fpr, 128);
5330 fxsave->cwd = fpu->fcw;
5331 fxsave->swd = fpu->fsw;
5332 fxsave->twd = fpu->ftwx;
5333 fxsave->fop = fpu->last_opcode;
5334 fxsave->rip = fpu->last_ip;
5335 fxsave->rdp = fpu->last_dp;
5336 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
5341 int fx_init(struct kvm_vcpu *vcpu)
5345 err = fpu_alloc(&vcpu->arch.guest_fpu);
5349 fpu_finit(&vcpu->arch.guest_fpu);
5352 * Ensure guest xcr0 is valid for loading
5354 vcpu->arch.xcr0 = XSTATE_FP;
5356 vcpu->arch.cr0 |= X86_CR0_ET;
5360 EXPORT_SYMBOL_GPL(fx_init);
5362 static void fx_free(struct kvm_vcpu *vcpu)
5364 fpu_free(&vcpu->arch.guest_fpu);
5367 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
5369 if (vcpu->guest_fpu_loaded)
5373 * Restore all possible states in the guest,
5374 * and assume host would use all available bits.
5375 * Guest xcr0 would be loaded later.
5377 kvm_put_guest_xcr0(vcpu);
5378 vcpu->guest_fpu_loaded = 1;
5379 unlazy_fpu(current);
5380 fpu_restore_checking(&vcpu->arch.guest_fpu);
5384 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
5386 kvm_put_guest_xcr0(vcpu);
5388 if (!vcpu->guest_fpu_loaded)
5391 vcpu->guest_fpu_loaded = 0;
5392 fpu_save_init(&vcpu->arch.guest_fpu);
5393 ++vcpu->stat.fpu_reload;
5394 set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
5398 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
5400 if (vcpu->arch.time_page) {
5401 kvm_release_page_dirty(vcpu->arch.time_page);
5402 vcpu->arch.time_page = NULL;
5406 kvm_x86_ops->vcpu_free(vcpu);
5409 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
5412 return kvm_x86_ops->vcpu_create(kvm, id);
5415 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
5419 vcpu->arch.mtrr_state.have_fixed = 1;
5421 r = kvm_arch_vcpu_reset(vcpu);
5423 r = kvm_mmu_setup(vcpu);
5430 kvm_x86_ops->vcpu_free(vcpu);
5434 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
5437 kvm_mmu_unload(vcpu);
5441 kvm_x86_ops->vcpu_free(vcpu);
5444 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
5446 vcpu->arch.nmi_pending = false;
5447 vcpu->arch.nmi_injected = false;
5449 vcpu->arch.switch_db_regs = 0;
5450 memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db));
5451 vcpu->arch.dr6 = DR6_FIXED_1;
5452 vcpu->arch.dr7 = DR7_FIXED_1;
5454 return kvm_x86_ops->vcpu_reset(vcpu);
5457 int kvm_arch_hardware_enable(void *garbage)
5460 * Since this may be called from a hotplug notifcation,
5461 * we can't get the CPU frequency directly.
5463 if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
5464 int cpu = raw_smp_processor_id();
5465 per_cpu(cpu_tsc_khz, cpu) = 0;
5468 kvm_shared_msr_cpu_online();
5470 return kvm_x86_ops->hardware_enable(garbage);
5473 void kvm_arch_hardware_disable(void *garbage)
5475 kvm_x86_ops->hardware_disable(garbage);
5476 drop_user_return_notifiers(garbage);
5479 int kvm_arch_hardware_setup(void)
5481 return kvm_x86_ops->hardware_setup();
5484 void kvm_arch_hardware_unsetup(void)
5486 kvm_x86_ops->hardware_unsetup();
5489 void kvm_arch_check_processor_compat(void *rtn)
5491 kvm_x86_ops->check_processor_compatibility(rtn);
5494 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
5500 BUG_ON(vcpu->kvm == NULL);
5503 vcpu->arch.mmu.root_hpa = INVALID_PAGE;
5504 if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu))
5505 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
5507 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
5509 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
5514 vcpu->arch.pio_data = page_address(page);
5516 r = kvm_mmu_create(vcpu);
5518 goto fail_free_pio_data;
5520 if (irqchip_in_kernel(kvm)) {
5521 r = kvm_create_lapic(vcpu);
5523 goto fail_mmu_destroy;
5526 vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
5528 if (!vcpu->arch.mce_banks) {
5530 goto fail_free_lapic;
5532 vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
5536 kvm_free_lapic(vcpu);
5538 kvm_mmu_destroy(vcpu);
5540 free_page((unsigned long)vcpu->arch.pio_data);
5545 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
5549 kfree(vcpu->arch.mce_banks);
5550 kvm_free_lapic(vcpu);
5551 idx = srcu_read_lock(&vcpu->kvm->srcu);
5552 kvm_mmu_destroy(vcpu);
5553 srcu_read_unlock(&vcpu->kvm->srcu, idx);
5554 free_page((unsigned long)vcpu->arch.pio_data);
5557 struct kvm *kvm_arch_create_vm(void)
5559 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
5562 return ERR_PTR(-ENOMEM);
5564 kvm->arch.aliases = kzalloc(sizeof(struct kvm_mem_aliases), GFP_KERNEL);
5565 if (!kvm->arch.aliases) {
5567 return ERR_PTR(-ENOMEM);
5570 INIT_LIST_HEAD(&kvm->arch.active_mmu_pages);
5571 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
5573 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
5574 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
5576 rdtscll(kvm->arch.vm_init_tsc);
5581 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
5584 kvm_mmu_unload(vcpu);
5588 static void kvm_free_vcpus(struct kvm *kvm)
5591 struct kvm_vcpu *vcpu;
5594 * Unpin any mmu pages first.
5596 kvm_for_each_vcpu(i, vcpu, kvm)
5597 kvm_unload_vcpu_mmu(vcpu);
5598 kvm_for_each_vcpu(i, vcpu, kvm)
5599 kvm_arch_vcpu_free(vcpu);
5601 mutex_lock(&kvm->lock);
5602 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
5603 kvm->vcpus[i] = NULL;
5605 atomic_set(&kvm->online_vcpus, 0);
5606 mutex_unlock(&kvm->lock);
5609 void kvm_arch_sync_events(struct kvm *kvm)
5611 kvm_free_all_assigned_devices(kvm);
5614 void kvm_arch_destroy_vm(struct kvm *kvm)
5616 kvm_iommu_unmap_guest(kvm);
5618 kfree(kvm->arch.vpic);
5619 kfree(kvm->arch.vioapic);
5620 kvm_free_vcpus(kvm);
5621 kvm_free_physmem(kvm);
5622 if (kvm->arch.apic_access_page)
5623 put_page(kvm->arch.apic_access_page);
5624 if (kvm->arch.ept_identity_pagetable)
5625 put_page(kvm->arch.ept_identity_pagetable);
5626 cleanup_srcu_struct(&kvm->srcu);
5627 kfree(kvm->arch.aliases);
5631 int kvm_arch_prepare_memory_region(struct kvm *kvm,
5632 struct kvm_memory_slot *memslot,
5633 struct kvm_memory_slot old,
5634 struct kvm_userspace_memory_region *mem,
5637 int npages = memslot->npages;
5639 /*To keep backward compatibility with older userspace,
5640 *x86 needs to hanlde !user_alloc case.
5643 if (npages && !old.rmap) {
5644 unsigned long userspace_addr;
5646 down_write(¤t->mm->mmap_sem);
5647 userspace_addr = do_mmap(NULL, 0,
5649 PROT_READ | PROT_WRITE,
5650 MAP_PRIVATE | MAP_ANONYMOUS,
5652 up_write(¤t->mm->mmap_sem);
5654 if (IS_ERR((void *)userspace_addr))
5655 return PTR_ERR((void *)userspace_addr);
5657 memslot->userspace_addr = userspace_addr;
5665 void kvm_arch_commit_memory_region(struct kvm *kvm,
5666 struct kvm_userspace_memory_region *mem,
5667 struct kvm_memory_slot old,
5671 int npages = mem->memory_size >> PAGE_SHIFT;
5673 if (!user_alloc && !old.user_alloc && old.rmap && !npages) {
5676 down_write(¤t->mm->mmap_sem);
5677 ret = do_munmap(current->mm, old.userspace_addr,
5678 old.npages * PAGE_SIZE);
5679 up_write(¤t->mm->mmap_sem);
5682 "kvm_vm_ioctl_set_memory_region: "
5683 "failed to munmap memory\n");
5686 spin_lock(&kvm->mmu_lock);
5687 if (!kvm->arch.n_requested_mmu_pages) {
5688 unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm);
5689 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
5692 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
5693 spin_unlock(&kvm->mmu_lock);
5696 void kvm_arch_flush_shadow(struct kvm *kvm)
5698 kvm_mmu_zap_all(kvm);
5699 kvm_reload_remote_mmus(kvm);
5702 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
5704 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE
5705 || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
5706 || vcpu->arch.nmi_pending ||
5707 (kvm_arch_interrupt_allowed(vcpu) &&
5708 kvm_cpu_has_interrupt(vcpu));
5711 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
5714 int cpu = vcpu->cpu;
5716 if (waitqueue_active(&vcpu->wq)) {
5717 wake_up_interruptible(&vcpu->wq);
5718 ++vcpu->stat.halt_wakeup;
5722 if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
5723 if (atomic_xchg(&vcpu->guest_mode, 0))
5724 smp_send_reschedule(cpu);
5728 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
5730 return kvm_x86_ops->interrupt_allowed(vcpu);
5733 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip)
5735 unsigned long current_rip = kvm_rip_read(vcpu) +
5736 get_segment_base(vcpu, VCPU_SREG_CS);
5738 return current_rip == linear_rip;
5740 EXPORT_SYMBOL_GPL(kvm_is_linear_rip);
5742 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu)
5744 unsigned long rflags;
5746 rflags = kvm_x86_ops->get_rflags(vcpu);
5747 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
5748 rflags &= ~X86_EFLAGS_TF;
5751 EXPORT_SYMBOL_GPL(kvm_get_rflags);
5753 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
5755 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP &&
5756 kvm_is_linear_rip(vcpu, vcpu->arch.singlestep_rip))
5757 rflags |= X86_EFLAGS_TF;
5758 kvm_x86_ops->set_rflags(vcpu, rflags);
5760 EXPORT_SYMBOL_GPL(kvm_set_rflags);
5762 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
5763 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
5764 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
5765 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
5766 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);
5767 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);
5768 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);
5769 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit_inject);
5770 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
5771 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
5772 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
5773 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);