2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Avi Kivity <avi@qumranet.com>
10 * Yaniv Kamay <yaniv@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
19 #include "x86_emulate.h"
20 #include "segment_descriptor.h"
23 #include <linux/kvm.h>
25 #include <linux/vmalloc.h>
26 #include <linux/module.h>
28 #include <asm/uaccess.h>
31 #define MAX_IO_MSRS 256
32 #define CR0_RESERVED_BITS \
33 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
34 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
35 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
36 #define CR4_RESERVED_BITS \
37 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
38 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
39 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
40 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
42 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
43 #define EFER_RESERVED_BITS 0xfffffffffffff2fe
45 #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
47 struct kvm_x86_ops *kvm_x86_ops;
49 struct kvm_stats_debugfs_item debugfs_entries[] = {
50 { "pf_fixed", STAT_OFFSET(pf_fixed) },
51 { "pf_guest", STAT_OFFSET(pf_guest) },
52 { "tlb_flush", STAT_OFFSET(tlb_flush) },
53 { "invlpg", STAT_OFFSET(invlpg) },
54 { "exits", STAT_OFFSET(exits) },
55 { "io_exits", STAT_OFFSET(io_exits) },
56 { "mmio_exits", STAT_OFFSET(mmio_exits) },
57 { "signal_exits", STAT_OFFSET(signal_exits) },
58 { "irq_window", STAT_OFFSET(irq_window_exits) },
59 { "halt_exits", STAT_OFFSET(halt_exits) },
60 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
61 { "request_irq", STAT_OFFSET(request_irq_exits) },
62 { "irq_exits", STAT_OFFSET(irq_exits) },
63 { "light_exits", STAT_OFFSET(light_exits) },
64 { "efer_reload", STAT_OFFSET(efer_reload) },
69 unsigned long segment_base(u16 selector)
71 struct descriptor_table gdt;
72 struct segment_descriptor *d;
73 unsigned long table_base;
79 asm("sgdt %0" : "=m"(gdt));
80 table_base = gdt.base;
82 if (selector & 4) { /* from ldt */
85 asm("sldt %0" : "=g"(ldt_selector));
86 table_base = segment_base(ldt_selector);
88 d = (struct segment_descriptor *)(table_base + (selector & ~7));
89 v = d->base_low | ((unsigned long)d->base_mid << 16) |
90 ((unsigned long)d->base_high << 24);
92 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
93 v |= ((unsigned long) \
94 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
98 EXPORT_SYMBOL_GPL(segment_base);
100 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
102 if (irqchip_in_kernel(vcpu->kvm))
103 return vcpu->apic_base;
105 return vcpu->apic_base;
107 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
109 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
111 /* TODO: reserve bits check */
112 if (irqchip_in_kernel(vcpu->kvm))
113 kvm_lapic_set_base(vcpu, data);
115 vcpu->apic_base = data;
117 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
119 static void inject_gp(struct kvm_vcpu *vcpu)
121 kvm_x86_ops->inject_gp(vcpu, 0);
125 * Load the pae pdptrs. Return true is they are all valid.
127 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
129 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
130 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
133 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
135 mutex_lock(&vcpu->kvm->lock);
136 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
137 offset * sizeof(u64), sizeof(pdpte));
142 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
143 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
150 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
152 mutex_unlock(&vcpu->kvm->lock);
157 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
159 if (cr0 & CR0_RESERVED_BITS) {
160 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
166 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
167 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
172 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
173 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
174 "and a clear PE flag\n");
179 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
181 if ((vcpu->shadow_efer & EFER_LME)) {
185 printk(KERN_DEBUG "set_cr0: #GP, start paging "
186 "in long mode while PAE is disabled\n");
190 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
192 printk(KERN_DEBUG "set_cr0: #GP, start paging "
193 "in long mode while CS.L == 1\n");
200 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
201 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
209 kvm_x86_ops->set_cr0(vcpu, cr0);
212 mutex_lock(&vcpu->kvm->lock);
213 kvm_mmu_reset_context(vcpu);
214 mutex_unlock(&vcpu->kvm->lock);
217 EXPORT_SYMBOL_GPL(set_cr0);
219 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
221 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
223 EXPORT_SYMBOL_GPL(lmsw);
225 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
227 if (cr4 & CR4_RESERVED_BITS) {
228 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
233 if (is_long_mode(vcpu)) {
234 if (!(cr4 & X86_CR4_PAE)) {
235 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
240 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
241 && !load_pdptrs(vcpu, vcpu->cr3)) {
242 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
247 if (cr4 & X86_CR4_VMXE) {
248 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
252 kvm_x86_ops->set_cr4(vcpu, cr4);
254 mutex_lock(&vcpu->kvm->lock);
255 kvm_mmu_reset_context(vcpu);
256 mutex_unlock(&vcpu->kvm->lock);
258 EXPORT_SYMBOL_GPL(set_cr4);
260 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
262 if (is_long_mode(vcpu)) {
263 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
264 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
270 if (cr3 & CR3_PAE_RESERVED_BITS) {
272 "set_cr3: #GP, reserved bits\n");
276 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
277 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
284 * We don't check reserved bits in nonpae mode, because
285 * this isn't enforced, and VMware depends on this.
289 mutex_lock(&vcpu->kvm->lock);
291 * Does the new cr3 value map to physical memory? (Note, we
292 * catch an invalid cr3 even in real-mode, because it would
293 * cause trouble later on when we turn on paging anyway.)
295 * A real CPU would silently accept an invalid cr3 and would
296 * attempt to use it - with largely undefined (and often hard
297 * to debug) behavior on the guest side.
299 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
303 vcpu->mmu.new_cr3(vcpu);
305 mutex_unlock(&vcpu->kvm->lock);
307 EXPORT_SYMBOL_GPL(set_cr3);
309 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
311 if (cr8 & CR8_RESERVED_BITS) {
312 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
316 if (irqchip_in_kernel(vcpu->kvm))
317 kvm_lapic_set_tpr(vcpu, cr8);
321 EXPORT_SYMBOL_GPL(set_cr8);
323 unsigned long get_cr8(struct kvm_vcpu *vcpu)
325 if (irqchip_in_kernel(vcpu->kvm))
326 return kvm_lapic_get_cr8(vcpu);
330 EXPORT_SYMBOL_GPL(get_cr8);
333 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
334 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
336 * This list is modified at module load time to reflect the
337 * capabilities of the host cpu.
339 static u32 msrs_to_save[] = {
340 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
343 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
345 MSR_IA32_TIME_STAMP_COUNTER,
348 static unsigned num_msrs_to_save;
350 static u32 emulated_msrs[] = {
351 MSR_IA32_MISC_ENABLE,
356 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
358 if (efer & EFER_RESERVED_BITS) {
359 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
366 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
367 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
372 kvm_x86_ops->set_efer(vcpu, efer);
375 efer |= vcpu->shadow_efer & EFER_LMA;
377 vcpu->shadow_efer = efer;
383 * Writes msr value into into the appropriate "register".
384 * Returns 0 on success, non-0 otherwise.
385 * Assumes vcpu_load() was already called.
387 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
389 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
393 * Adapt set_msr() to msr_io()'s calling convention
395 static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
397 return kvm_set_msr(vcpu, index, *data);
401 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
406 set_efer(vcpu, data);
409 case MSR_IA32_MC0_STATUS:
410 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
413 case MSR_IA32_MCG_STATUS:
414 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
417 case MSR_IA32_UCODE_REV:
418 case MSR_IA32_UCODE_WRITE:
419 case 0x200 ... 0x2ff: /* MTRRs */
421 case MSR_IA32_APICBASE:
422 kvm_set_apic_base(vcpu, data);
424 case MSR_IA32_MISC_ENABLE:
425 vcpu->ia32_misc_enable_msr = data;
428 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
433 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
437 * Reads an msr value (of 'msr_index') into 'pdata'.
438 * Returns 0 on success, non-0 otherwise.
439 * Assumes vcpu_load() was already called.
441 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
443 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
446 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
451 case 0xc0010010: /* SYSCFG */
452 case 0xc0010015: /* HWCR */
453 case MSR_IA32_PLATFORM_ID:
454 case MSR_IA32_P5_MC_ADDR:
455 case MSR_IA32_P5_MC_TYPE:
456 case MSR_IA32_MC0_CTL:
457 case MSR_IA32_MCG_STATUS:
458 case MSR_IA32_MCG_CAP:
459 case MSR_IA32_MC0_MISC:
460 case MSR_IA32_MC0_MISC+4:
461 case MSR_IA32_MC0_MISC+8:
462 case MSR_IA32_MC0_MISC+12:
463 case MSR_IA32_MC0_MISC+16:
464 case MSR_IA32_UCODE_REV:
465 case MSR_IA32_PERF_STATUS:
466 case MSR_IA32_EBL_CR_POWERON:
469 case 0x200 ... 0x2ff:
472 case 0xcd: /* fsb frequency */
475 case MSR_IA32_APICBASE:
476 data = kvm_get_apic_base(vcpu);
478 case MSR_IA32_MISC_ENABLE:
479 data = vcpu->ia32_misc_enable_msr;
483 data = vcpu->shadow_efer;
487 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
493 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
496 * Read or write a bunch of msrs. All parameters are kernel addresses.
498 * @return number of msrs set successfully.
500 static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
501 struct kvm_msr_entry *entries,
502 int (*do_msr)(struct kvm_vcpu *vcpu,
503 unsigned index, u64 *data))
509 for (i = 0; i < msrs->nmsrs; ++i)
510 if (do_msr(vcpu, entries[i].index, &entries[i].data))
519 * Read or write a bunch of msrs. Parameters are user addresses.
521 * @return number of msrs set successfully.
523 static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
524 int (*do_msr)(struct kvm_vcpu *vcpu,
525 unsigned index, u64 *data),
528 struct kvm_msrs msrs;
529 struct kvm_msr_entry *entries;
534 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
538 if (msrs.nmsrs >= MAX_IO_MSRS)
542 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
543 entries = vmalloc(size);
548 if (copy_from_user(entries, user_msrs->entries, size))
551 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
556 if (writeback && copy_to_user(user_msrs->entries, entries, size))
568 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
571 void decache_vcpus_on_cpu(int cpu)
574 struct kvm_vcpu *vcpu;
577 spin_lock(&kvm_lock);
578 list_for_each_entry(vm, &vm_list, vm_list)
579 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
584 * If the vcpu is locked, then it is running on some
585 * other cpu and therefore it is not cached on the
588 * If it's not locked, check the last cpu it executed
591 if (mutex_trylock(&vcpu->mutex)) {
592 if (vcpu->cpu == cpu) {
593 kvm_x86_ops->vcpu_decache(vcpu);
596 mutex_unlock(&vcpu->mutex);
599 spin_unlock(&kvm_lock);
602 int kvm_dev_ioctl_check_extension(long ext)
607 case KVM_CAP_IRQCHIP:
609 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
610 case KVM_CAP_USER_MEMORY:
611 case KVM_CAP_SET_TSS_ADDR:
622 long kvm_arch_dev_ioctl(struct file *filp,
623 unsigned int ioctl, unsigned long arg)
625 void __user *argp = (void __user *)arg;
629 case KVM_GET_MSR_INDEX_LIST: {
630 struct kvm_msr_list __user *user_msr_list = argp;
631 struct kvm_msr_list msr_list;
635 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
638 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
639 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
642 if (n < num_msrs_to_save)
645 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
646 num_msrs_to_save * sizeof(u32)))
648 if (copy_to_user(user_msr_list->indices
649 + num_msrs_to_save * sizeof(u32),
651 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
663 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
665 kvm_x86_ops->vcpu_load(vcpu, cpu);
668 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
670 kvm_x86_ops->vcpu_put(vcpu);
673 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
677 struct kvm_cpuid_entry *e, *entry;
679 rdmsrl(MSR_EFER, efer);
681 for (i = 0; i < vcpu->cpuid_nent; ++i) {
682 e = &vcpu->cpuid_entries[i];
683 if (e->function == 0x80000001) {
688 if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
689 entry->edx &= ~(1 << 20);
690 printk(KERN_INFO "kvm: guest NX capability removed\n");
694 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
695 struct kvm_cpuid *cpuid,
696 struct kvm_cpuid_entry __user *entries)
701 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
704 if (copy_from_user(&vcpu->cpuid_entries, entries,
705 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
707 vcpu->cpuid_nent = cpuid->nent;
708 cpuid_fix_nx_cap(vcpu);
715 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
716 struct kvm_lapic_state *s)
719 memcpy(s->regs, vcpu->apic->regs, sizeof *s);
725 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
726 struct kvm_lapic_state *s)
729 memcpy(vcpu->apic->regs, s->regs, sizeof *s);
730 kvm_apic_post_state_restore(vcpu);
736 long kvm_arch_vcpu_ioctl(struct file *filp,
737 unsigned int ioctl, unsigned long arg)
739 struct kvm_vcpu *vcpu = filp->private_data;
740 void __user *argp = (void __user *)arg;
744 case KVM_GET_LAPIC: {
745 struct kvm_lapic_state lapic;
747 memset(&lapic, 0, sizeof lapic);
748 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
752 if (copy_to_user(argp, &lapic, sizeof lapic))
757 case KVM_SET_LAPIC: {
758 struct kvm_lapic_state lapic;
761 if (copy_from_user(&lapic, argp, sizeof lapic))
763 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
769 case KVM_SET_CPUID: {
770 struct kvm_cpuid __user *cpuid_arg = argp;
771 struct kvm_cpuid cpuid;
774 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
776 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
782 r = msr_io(vcpu, argp, kvm_get_msr, 1);
785 r = msr_io(vcpu, argp, do_set_msr, 0);
794 static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
798 if (addr > (unsigned int)(-3 * PAGE_SIZE))
800 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
804 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
805 u32 kvm_nr_mmu_pages)
807 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
810 mutex_lock(&kvm->lock);
812 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
813 kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
815 mutex_unlock(&kvm->lock);
819 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
821 return kvm->n_alloc_mmu_pages;
825 * Set a new alias region. Aliases map a portion of physical memory into
826 * another portion. This is useful for memory windows, for example the PC
829 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
830 struct kvm_memory_alias *alias)
833 struct kvm_mem_alias *p;
836 /* General sanity checks */
837 if (alias->memory_size & (PAGE_SIZE - 1))
839 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
841 if (alias->slot >= KVM_ALIAS_SLOTS)
843 if (alias->guest_phys_addr + alias->memory_size
844 < alias->guest_phys_addr)
846 if (alias->target_phys_addr + alias->memory_size
847 < alias->target_phys_addr)
850 mutex_lock(&kvm->lock);
852 p = &kvm->aliases[alias->slot];
853 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
854 p->npages = alias->memory_size >> PAGE_SHIFT;
855 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
857 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
858 if (kvm->aliases[n - 1].npages)
862 kvm_mmu_zap_all(kvm);
864 mutex_unlock(&kvm->lock);
872 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
877 switch (chip->chip_id) {
878 case KVM_IRQCHIP_PIC_MASTER:
879 memcpy(&chip->chip.pic,
880 &pic_irqchip(kvm)->pics[0],
881 sizeof(struct kvm_pic_state));
883 case KVM_IRQCHIP_PIC_SLAVE:
884 memcpy(&chip->chip.pic,
885 &pic_irqchip(kvm)->pics[1],
886 sizeof(struct kvm_pic_state));
888 case KVM_IRQCHIP_IOAPIC:
889 memcpy(&chip->chip.ioapic,
891 sizeof(struct kvm_ioapic_state));
900 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
905 switch (chip->chip_id) {
906 case KVM_IRQCHIP_PIC_MASTER:
907 memcpy(&pic_irqchip(kvm)->pics[0],
909 sizeof(struct kvm_pic_state));
911 case KVM_IRQCHIP_PIC_SLAVE:
912 memcpy(&pic_irqchip(kvm)->pics[1],
914 sizeof(struct kvm_pic_state));
916 case KVM_IRQCHIP_IOAPIC:
917 memcpy(ioapic_irqchip(kvm),
919 sizeof(struct kvm_ioapic_state));
925 kvm_pic_update_irq(pic_irqchip(kvm));
929 long kvm_arch_vm_ioctl(struct file *filp,
930 unsigned int ioctl, unsigned long arg)
932 struct kvm *kvm = filp->private_data;
933 void __user *argp = (void __user *)arg;
937 case KVM_SET_TSS_ADDR:
938 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
942 case KVM_SET_MEMORY_REGION: {
943 struct kvm_memory_region kvm_mem;
944 struct kvm_userspace_memory_region kvm_userspace_mem;
947 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
949 kvm_userspace_mem.slot = kvm_mem.slot;
950 kvm_userspace_mem.flags = kvm_mem.flags;
951 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
952 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
953 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
958 case KVM_SET_NR_MMU_PAGES:
959 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
963 case KVM_GET_NR_MMU_PAGES:
964 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
966 case KVM_SET_MEMORY_ALIAS: {
967 struct kvm_memory_alias alias;
970 if (copy_from_user(&alias, argp, sizeof alias))
972 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
977 case KVM_CREATE_IRQCHIP:
979 kvm->vpic = kvm_create_pic(kvm);
981 r = kvm_ioapic_init(kvm);
991 struct kvm_irq_level irq_event;
994 if (copy_from_user(&irq_event, argp, sizeof irq_event))
996 if (irqchip_in_kernel(kvm)) {
997 mutex_lock(&kvm->lock);
998 if (irq_event.irq < 16)
999 kvm_pic_set_irq(pic_irqchip(kvm),
1002 kvm_ioapic_set_irq(kvm->vioapic,
1005 mutex_unlock(&kvm->lock);
1010 case KVM_GET_IRQCHIP: {
1011 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1012 struct kvm_irqchip chip;
1015 if (copy_from_user(&chip, argp, sizeof chip))
1018 if (!irqchip_in_kernel(kvm))
1020 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1024 if (copy_to_user(argp, &chip, sizeof chip))
1029 case KVM_SET_IRQCHIP: {
1030 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1031 struct kvm_irqchip chip;
1034 if (copy_from_user(&chip, argp, sizeof chip))
1037 if (!irqchip_in_kernel(kvm))
1039 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1052 static __init void kvm_init_msr_list(void)
1057 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1058 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1061 msrs_to_save[j] = msrs_to_save[i];
1064 num_msrs_to_save = j;
1068 * Only apic need an MMIO device hook, so shortcut now..
1070 static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1073 struct kvm_io_device *dev;
1076 dev = &vcpu->apic->dev;
1077 if (dev->in_range(dev, addr))
1084 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1087 struct kvm_io_device *dev;
1089 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1091 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1095 int emulator_read_std(unsigned long addr,
1098 struct kvm_vcpu *vcpu)
1103 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1104 unsigned offset = addr & (PAGE_SIZE-1);
1105 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1108 if (gpa == UNMAPPED_GVA)
1109 return X86EMUL_PROPAGATE_FAULT;
1110 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1112 return X86EMUL_UNHANDLEABLE;
1119 return X86EMUL_CONTINUE;
1121 EXPORT_SYMBOL_GPL(emulator_read_std);
1123 static int emulator_write_std(unsigned long addr,
1126 struct kvm_vcpu *vcpu)
1128 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
1129 return X86EMUL_UNHANDLEABLE;
1132 static int emulator_read_emulated(unsigned long addr,
1135 struct kvm_vcpu *vcpu)
1137 struct kvm_io_device *mmio_dev;
1140 if (vcpu->mmio_read_completed) {
1141 memcpy(val, vcpu->mmio_data, bytes);
1142 vcpu->mmio_read_completed = 0;
1143 return X86EMUL_CONTINUE;
1146 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1148 /* For APIC access vmexit */
1149 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1152 if (emulator_read_std(addr, val, bytes, vcpu)
1153 == X86EMUL_CONTINUE)
1154 return X86EMUL_CONTINUE;
1155 if (gpa == UNMAPPED_GVA)
1156 return X86EMUL_PROPAGATE_FAULT;
1160 * Is this MMIO handled locally?
1162 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1164 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1165 return X86EMUL_CONTINUE;
1168 vcpu->mmio_needed = 1;
1169 vcpu->mmio_phys_addr = gpa;
1170 vcpu->mmio_size = bytes;
1171 vcpu->mmio_is_write = 0;
1173 return X86EMUL_UNHANDLEABLE;
1176 static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1177 const void *val, int bytes)
1181 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1184 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1188 static int emulator_write_emulated_onepage(unsigned long addr,
1191 struct kvm_vcpu *vcpu)
1193 struct kvm_io_device *mmio_dev;
1194 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1196 if (gpa == UNMAPPED_GVA) {
1197 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
1198 return X86EMUL_PROPAGATE_FAULT;
1201 /* For APIC access vmexit */
1202 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1205 if (emulator_write_phys(vcpu, gpa, val, bytes))
1206 return X86EMUL_CONTINUE;
1210 * Is this MMIO handled locally?
1212 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1214 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1215 return X86EMUL_CONTINUE;
1218 vcpu->mmio_needed = 1;
1219 vcpu->mmio_phys_addr = gpa;
1220 vcpu->mmio_size = bytes;
1221 vcpu->mmio_is_write = 1;
1222 memcpy(vcpu->mmio_data, val, bytes);
1224 return X86EMUL_CONTINUE;
1227 int emulator_write_emulated(unsigned long addr,
1230 struct kvm_vcpu *vcpu)
1232 /* Crossing a page boundary? */
1233 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1236 now = -addr & ~PAGE_MASK;
1237 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1238 if (rc != X86EMUL_CONTINUE)
1244 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1246 EXPORT_SYMBOL_GPL(emulator_write_emulated);
1248 static int emulator_cmpxchg_emulated(unsigned long addr,
1252 struct kvm_vcpu *vcpu)
1254 static int reported;
1258 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1260 return emulator_write_emulated(addr, new, bytes, vcpu);
1263 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1265 return kvm_x86_ops->get_segment_base(vcpu, seg);
1268 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1270 return X86EMUL_CONTINUE;
1273 int emulate_clts(struct kvm_vcpu *vcpu)
1275 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
1276 return X86EMUL_CONTINUE;
1279 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1281 struct kvm_vcpu *vcpu = ctxt->vcpu;
1285 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1286 return X86EMUL_CONTINUE;
1288 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1289 return X86EMUL_UNHANDLEABLE;
1293 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1295 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1298 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1300 /* FIXME: better handling */
1301 return X86EMUL_UNHANDLEABLE;
1303 return X86EMUL_CONTINUE;
1306 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1308 static int reported;
1310 unsigned long rip = vcpu->rip;
1311 unsigned long rip_linear;
1313 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1318 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1320 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1321 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1324 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1326 struct x86_emulate_ops emulate_ops = {
1327 .read_std = emulator_read_std,
1328 .write_std = emulator_write_std,
1329 .read_emulated = emulator_read_emulated,
1330 .write_emulated = emulator_write_emulated,
1331 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1334 int emulate_instruction(struct kvm_vcpu *vcpu,
1335 struct kvm_run *run,
1342 vcpu->mmio_fault_cr2 = cr2;
1343 kvm_x86_ops->cache_regs(vcpu);
1345 vcpu->mmio_is_write = 0;
1346 vcpu->pio.string = 0;
1350 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1352 vcpu->emulate_ctxt.vcpu = vcpu;
1353 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1354 vcpu->emulate_ctxt.cr2 = cr2;
1355 vcpu->emulate_ctxt.mode =
1356 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1357 ? X86EMUL_MODE_REAL : cs_l
1358 ? X86EMUL_MODE_PROT64 : cs_db
1359 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1361 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1362 vcpu->emulate_ctxt.cs_base = 0;
1363 vcpu->emulate_ctxt.ds_base = 0;
1364 vcpu->emulate_ctxt.es_base = 0;
1365 vcpu->emulate_ctxt.ss_base = 0;
1367 vcpu->emulate_ctxt.cs_base =
1368 get_segment_base(vcpu, VCPU_SREG_CS);
1369 vcpu->emulate_ctxt.ds_base =
1370 get_segment_base(vcpu, VCPU_SREG_DS);
1371 vcpu->emulate_ctxt.es_base =
1372 get_segment_base(vcpu, VCPU_SREG_ES);
1373 vcpu->emulate_ctxt.ss_base =
1374 get_segment_base(vcpu, VCPU_SREG_SS);
1377 vcpu->emulate_ctxt.gs_base =
1378 get_segment_base(vcpu, VCPU_SREG_GS);
1379 vcpu->emulate_ctxt.fs_base =
1380 get_segment_base(vcpu, VCPU_SREG_FS);
1382 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
1384 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1385 return EMULATE_DONE;
1386 return EMULATE_FAIL;
1390 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1392 if (vcpu->pio.string)
1393 return EMULATE_DO_MMIO;
1395 if ((r || vcpu->mmio_is_write) && run) {
1396 run->exit_reason = KVM_EXIT_MMIO;
1397 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1398 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1399 run->mmio.len = vcpu->mmio_size;
1400 run->mmio.is_write = vcpu->mmio_is_write;
1404 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1405 return EMULATE_DONE;
1406 if (!vcpu->mmio_needed) {
1407 kvm_report_emulation_failure(vcpu, "mmio");
1408 return EMULATE_FAIL;
1410 return EMULATE_DO_MMIO;
1413 kvm_x86_ops->decache_regs(vcpu);
1414 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
1416 if (vcpu->mmio_is_write) {
1417 vcpu->mmio_needed = 0;
1418 return EMULATE_DO_MMIO;
1421 return EMULATE_DONE;
1423 EXPORT_SYMBOL_GPL(emulate_instruction);
1425 static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
1429 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
1430 if (vcpu->pio.guest_pages[i]) {
1431 kvm_release_page(vcpu->pio.guest_pages[i]);
1432 vcpu->pio.guest_pages[i] = NULL;
1436 static int pio_copy_data(struct kvm_vcpu *vcpu)
1438 void *p = vcpu->pio_data;
1441 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1443 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1446 free_pio_guest_pages(vcpu);
1449 q += vcpu->pio.guest_page_offset;
1450 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1452 memcpy(q, p, bytes);
1454 memcpy(p, q, bytes);
1455 q -= vcpu->pio.guest_page_offset;
1457 free_pio_guest_pages(vcpu);
1461 int complete_pio(struct kvm_vcpu *vcpu)
1463 struct kvm_pio_request *io = &vcpu->pio;
1467 kvm_x86_ops->cache_regs(vcpu);
1471 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
1475 r = pio_copy_data(vcpu);
1477 kvm_x86_ops->cache_regs(vcpu);
1484 delta *= io->cur_count;
1486 * The size of the register should really depend on
1487 * current address size.
1489 vcpu->regs[VCPU_REGS_RCX] -= delta;
1495 vcpu->regs[VCPU_REGS_RDI] += delta;
1497 vcpu->regs[VCPU_REGS_RSI] += delta;
1500 kvm_x86_ops->decache_regs(vcpu);
1502 io->count -= io->cur_count;
1508 static void kernel_pio(struct kvm_io_device *pio_dev,
1509 struct kvm_vcpu *vcpu,
1512 /* TODO: String I/O for in kernel device */
1514 mutex_lock(&vcpu->kvm->lock);
1516 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1520 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1523 mutex_unlock(&vcpu->kvm->lock);
1526 static void pio_string_write(struct kvm_io_device *pio_dev,
1527 struct kvm_vcpu *vcpu)
1529 struct kvm_pio_request *io = &vcpu->pio;
1530 void *pd = vcpu->pio_data;
1533 mutex_lock(&vcpu->kvm->lock);
1534 for (i = 0; i < io->cur_count; i++) {
1535 kvm_iodevice_write(pio_dev, io->port,
1540 mutex_unlock(&vcpu->kvm->lock);
1543 static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1546 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1549 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1550 int size, unsigned port)
1552 struct kvm_io_device *pio_dev;
1554 vcpu->run->exit_reason = KVM_EXIT_IO;
1555 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1556 vcpu->run->io.size = vcpu->pio.size = size;
1557 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1558 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1559 vcpu->run->io.port = vcpu->pio.port = port;
1561 vcpu->pio.string = 0;
1563 vcpu->pio.guest_page_offset = 0;
1566 kvm_x86_ops->cache_regs(vcpu);
1567 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
1568 kvm_x86_ops->decache_regs(vcpu);
1570 kvm_x86_ops->skip_emulated_instruction(vcpu);
1572 pio_dev = vcpu_find_pio_dev(vcpu, port);
1574 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1580 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1582 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1583 int size, unsigned long count, int down,
1584 gva_t address, int rep, unsigned port)
1586 unsigned now, in_page;
1590 struct kvm_io_device *pio_dev;
1592 vcpu->run->exit_reason = KVM_EXIT_IO;
1593 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1594 vcpu->run->io.size = vcpu->pio.size = size;
1595 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1596 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1597 vcpu->run->io.port = vcpu->pio.port = port;
1599 vcpu->pio.string = 1;
1600 vcpu->pio.down = down;
1601 vcpu->pio.guest_page_offset = offset_in_page(address);
1602 vcpu->pio.rep = rep;
1605 kvm_x86_ops->skip_emulated_instruction(vcpu);
1610 in_page = PAGE_SIZE - offset_in_page(address);
1612 in_page = offset_in_page(address) + size;
1613 now = min(count, (unsigned long)in_page / size);
1616 * String I/O straddles page boundary. Pin two guest pages
1617 * so that we satisfy atomicity constraints. Do just one
1618 * transaction to avoid complexity.
1625 * String I/O in reverse. Yuck. Kill the guest, fix later.
1627 pr_unimpl(vcpu, "guest string pio down\n");
1631 vcpu->run->io.count = now;
1632 vcpu->pio.cur_count = now;
1634 if (vcpu->pio.cur_count == vcpu->pio.count)
1635 kvm_x86_ops->skip_emulated_instruction(vcpu);
1637 for (i = 0; i < nr_pages; ++i) {
1638 mutex_lock(&vcpu->kvm->lock);
1639 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1640 vcpu->pio.guest_pages[i] = page;
1641 mutex_unlock(&vcpu->kvm->lock);
1644 free_pio_guest_pages(vcpu);
1649 pio_dev = vcpu_find_pio_dev(vcpu, port);
1650 if (!vcpu->pio.in) {
1651 /* string PIO write */
1652 ret = pio_copy_data(vcpu);
1653 if (ret >= 0 && pio_dev) {
1654 pio_string_write(pio_dev, vcpu);
1656 if (vcpu->pio.count == 0)
1660 pr_unimpl(vcpu, "no string pio read support yet, "
1661 "port %x size %d count %ld\n",
1666 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
1668 int kvm_arch_init(void *opaque)
1670 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
1672 kvm_init_msr_list();
1675 printk(KERN_ERR "kvm: already loaded the other module\n");
1679 if (!ops->cpu_has_kvm_support()) {
1680 printk(KERN_ERR "kvm: no hardware support\n");
1683 if (ops->disabled_by_bios()) {
1684 printk(KERN_ERR "kvm: disabled by bios\n");
1693 void kvm_arch_exit(void)
1698 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1700 ++vcpu->stat.halt_exits;
1701 if (irqchip_in_kernel(vcpu->kvm)) {
1702 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1703 kvm_vcpu_block(vcpu);
1704 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1708 vcpu->run->exit_reason = KVM_EXIT_HLT;
1712 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1714 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
1716 unsigned long nr, a0, a1, a2, a3, ret;
1718 kvm_x86_ops->cache_regs(vcpu);
1720 nr = vcpu->regs[VCPU_REGS_RAX];
1721 a0 = vcpu->regs[VCPU_REGS_RBX];
1722 a1 = vcpu->regs[VCPU_REGS_RCX];
1723 a2 = vcpu->regs[VCPU_REGS_RDX];
1724 a3 = vcpu->regs[VCPU_REGS_RSI];
1726 if (!is_long_mode(vcpu)) {
1739 vcpu->regs[VCPU_REGS_RAX] = ret;
1740 kvm_x86_ops->decache_regs(vcpu);
1743 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1745 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1747 char instruction[3];
1750 mutex_lock(&vcpu->kvm->lock);
1753 * Blow out the MMU to ensure that no other VCPU has an active mapping
1754 * to ensure that the updated hypercall appears atomically across all
1757 kvm_mmu_zap_all(vcpu->kvm);
1759 kvm_x86_ops->cache_regs(vcpu);
1760 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1761 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1762 != X86EMUL_CONTINUE)
1765 mutex_unlock(&vcpu->kvm->lock);
1770 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1772 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1775 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1777 struct descriptor_table dt = { limit, base };
1779 kvm_x86_ops->set_gdt(vcpu, &dt);
1782 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1784 struct descriptor_table dt = { limit, base };
1786 kvm_x86_ops->set_idt(vcpu, &dt);
1789 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1790 unsigned long *rflags)
1793 *rflags = kvm_x86_ops->get_rflags(vcpu);
1796 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1798 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
1809 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1814 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1815 unsigned long *rflags)
1819 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
1820 *rflags = kvm_x86_ops->get_rflags(vcpu);
1829 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1832 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1836 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1840 struct kvm_cpuid_entry *e, *best;
1842 kvm_x86_ops->cache_regs(vcpu);
1843 function = vcpu->regs[VCPU_REGS_RAX];
1844 vcpu->regs[VCPU_REGS_RAX] = 0;
1845 vcpu->regs[VCPU_REGS_RBX] = 0;
1846 vcpu->regs[VCPU_REGS_RCX] = 0;
1847 vcpu->regs[VCPU_REGS_RDX] = 0;
1849 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1850 e = &vcpu->cpuid_entries[i];
1851 if (e->function == function) {
1856 * Both basic or both extended?
1858 if (((e->function ^ function) & 0x80000000) == 0)
1859 if (!best || e->function > best->function)
1863 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1864 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1865 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1866 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1868 kvm_x86_ops->decache_regs(vcpu);
1869 kvm_x86_ops->skip_emulated_instruction(vcpu);
1871 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1874 * Check if userspace requested an interrupt window, and that the
1875 * interrupt window is open.
1877 * No need to exit to userspace if we already have an interrupt queued.
1879 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1880 struct kvm_run *kvm_run)
1882 return (!vcpu->irq_summary &&
1883 kvm_run->request_interrupt_window &&
1884 vcpu->interrupt_window_open &&
1885 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
1888 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1889 struct kvm_run *kvm_run)
1891 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
1892 kvm_run->cr8 = get_cr8(vcpu);
1893 kvm_run->apic_base = kvm_get_apic_base(vcpu);
1894 if (irqchip_in_kernel(vcpu->kvm))
1895 kvm_run->ready_for_interrupt_injection = 1;
1897 kvm_run->ready_for_interrupt_injection =
1898 (vcpu->interrupt_window_open &&
1899 vcpu->irq_summary == 0);
1902 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1906 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
1907 pr_debug("vcpu %d received sipi with vector # %x\n",
1908 vcpu->vcpu_id, vcpu->sipi_vector);
1909 kvm_lapic_reset(vcpu);
1910 r = kvm_x86_ops->vcpu_reset(vcpu);
1913 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
1917 if (vcpu->guest_debug.enabled)
1918 kvm_x86_ops->guest_debug_pre(vcpu);
1921 r = kvm_mmu_reload(vcpu);
1925 kvm_inject_pending_timer_irqs(vcpu);
1929 kvm_x86_ops->prepare_guest_switch(vcpu);
1930 kvm_load_guest_fpu(vcpu);
1932 local_irq_disable();
1934 if (signal_pending(current)) {
1938 kvm_run->exit_reason = KVM_EXIT_INTR;
1939 ++vcpu->stat.signal_exits;
1943 if (irqchip_in_kernel(vcpu->kvm))
1944 kvm_x86_ops->inject_pending_irq(vcpu);
1945 else if (!vcpu->mmio_read_completed)
1946 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
1948 vcpu->guest_mode = 1;
1952 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
1953 kvm_x86_ops->tlb_flush(vcpu);
1955 kvm_x86_ops->run(vcpu, kvm_run);
1957 vcpu->guest_mode = 0;
1963 * We must have an instruction between local_irq_enable() and
1964 * kvm_guest_exit(), so the timer interrupt isn't delayed by
1965 * the interrupt shadow. The stat.exits increment will do nicely.
1966 * But we need to prevent reordering, hence this barrier():
1975 * Profile KVM exit RIPs:
1977 if (unlikely(prof_on == KVM_PROFILING)) {
1978 kvm_x86_ops->cache_regs(vcpu);
1979 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
1982 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
1985 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
1987 kvm_run->exit_reason = KVM_EXIT_INTR;
1988 ++vcpu->stat.request_irq_exits;
1991 if (!need_resched()) {
1992 ++vcpu->stat.light_exits;
2003 post_kvm_run_save(vcpu, kvm_run);
2008 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2015 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2016 kvm_vcpu_block(vcpu);
2021 if (vcpu->sigset_active)
2022 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2024 /* re-sync apic's tpr */
2025 if (!irqchip_in_kernel(vcpu->kvm))
2026 set_cr8(vcpu, kvm_run->cr8);
2028 if (vcpu->pio.cur_count) {
2029 r = complete_pio(vcpu);
2033 #if CONFIG_HAS_IOMEM
2034 if (vcpu->mmio_needed) {
2035 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2036 vcpu->mmio_read_completed = 1;
2037 vcpu->mmio_needed = 0;
2038 r = emulate_instruction(vcpu, kvm_run,
2039 vcpu->mmio_fault_cr2, 0, 1);
2040 if (r == EMULATE_DO_MMIO) {
2042 * Read-modify-write. Back to userspace.
2049 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2050 kvm_x86_ops->cache_regs(vcpu);
2051 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2052 kvm_x86_ops->decache_regs(vcpu);
2055 r = __vcpu_run(vcpu, kvm_run);
2058 if (vcpu->sigset_active)
2059 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2065 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2069 kvm_x86_ops->cache_regs(vcpu);
2071 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2072 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2073 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2074 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2075 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2076 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2077 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2078 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
2079 #ifdef CONFIG_X86_64
2080 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2081 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2082 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2083 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2084 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2085 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2086 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2087 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2090 regs->rip = vcpu->rip;
2091 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2094 * Don't leak debug flags in case they were set for guest debugging
2096 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2097 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2104 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2108 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2109 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2110 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2111 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2112 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2113 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2114 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2115 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
2116 #ifdef CONFIG_X86_64
2117 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2118 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2119 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2120 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2121 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2122 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2123 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2124 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2127 vcpu->rip = regs->rip;
2128 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2130 kvm_x86_ops->decache_regs(vcpu);
2137 static void get_segment(struct kvm_vcpu *vcpu,
2138 struct kvm_segment *var, int seg)
2140 return kvm_x86_ops->get_segment(vcpu, var, seg);
2143 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2145 struct kvm_segment cs;
2147 get_segment(vcpu, &cs, VCPU_SREG_CS);
2151 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2153 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2154 struct kvm_sregs *sregs)
2156 struct descriptor_table dt;
2161 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2162 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2163 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2164 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2165 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2166 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2168 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2169 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2171 kvm_x86_ops->get_idt(vcpu, &dt);
2172 sregs->idt.limit = dt.limit;
2173 sregs->idt.base = dt.base;
2174 kvm_x86_ops->get_gdt(vcpu, &dt);
2175 sregs->gdt.limit = dt.limit;
2176 sregs->gdt.base = dt.base;
2178 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2179 sregs->cr0 = vcpu->cr0;
2180 sregs->cr2 = vcpu->cr2;
2181 sregs->cr3 = vcpu->cr3;
2182 sregs->cr4 = vcpu->cr4;
2183 sregs->cr8 = get_cr8(vcpu);
2184 sregs->efer = vcpu->shadow_efer;
2185 sregs->apic_base = kvm_get_apic_base(vcpu);
2187 if (irqchip_in_kernel(vcpu->kvm)) {
2188 memset(sregs->interrupt_bitmap, 0,
2189 sizeof sregs->interrupt_bitmap);
2190 pending_vec = kvm_x86_ops->get_irq(vcpu);
2191 if (pending_vec >= 0)
2192 set_bit(pending_vec,
2193 (unsigned long *)sregs->interrupt_bitmap);
2195 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2196 sizeof sregs->interrupt_bitmap);
2203 static void set_segment(struct kvm_vcpu *vcpu,
2204 struct kvm_segment *var, int seg)
2206 return kvm_x86_ops->set_segment(vcpu, var, seg);
2209 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2210 struct kvm_sregs *sregs)
2212 int mmu_reset_needed = 0;
2213 int i, pending_vec, max_bits;
2214 struct descriptor_table dt;
2218 dt.limit = sregs->idt.limit;
2219 dt.base = sregs->idt.base;
2220 kvm_x86_ops->set_idt(vcpu, &dt);
2221 dt.limit = sregs->gdt.limit;
2222 dt.base = sregs->gdt.base;
2223 kvm_x86_ops->set_gdt(vcpu, &dt);
2225 vcpu->cr2 = sregs->cr2;
2226 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2227 vcpu->cr3 = sregs->cr3;
2229 set_cr8(vcpu, sregs->cr8);
2231 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
2232 #ifdef CONFIG_X86_64
2233 kvm_x86_ops->set_efer(vcpu, sregs->efer);
2235 kvm_set_apic_base(vcpu, sregs->apic_base);
2237 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2239 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
2240 vcpu->cr0 = sregs->cr0;
2241 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
2243 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
2244 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
2245 if (!is_long_mode(vcpu) && is_pae(vcpu))
2246 load_pdptrs(vcpu, vcpu->cr3);
2248 if (mmu_reset_needed)
2249 kvm_mmu_reset_context(vcpu);
2251 if (!irqchip_in_kernel(vcpu->kvm)) {
2252 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2253 sizeof vcpu->irq_pending);
2254 vcpu->irq_summary = 0;
2255 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2256 if (vcpu->irq_pending[i])
2257 __set_bit(i, &vcpu->irq_summary);
2259 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2260 pending_vec = find_first_bit(
2261 (const unsigned long *)sregs->interrupt_bitmap,
2263 /* Only pending external irq is handled here */
2264 if (pending_vec < max_bits) {
2265 kvm_x86_ops->set_irq(vcpu, pending_vec);
2266 pr_debug("Set back pending irq %d\n",
2271 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2272 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2273 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2274 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2275 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2276 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2278 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2279 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2286 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2287 struct kvm_debug_guest *dbg)
2293 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
2301 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2302 * we have asm/x86/processor.h
2313 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2314 #ifdef CONFIG_X86_64
2315 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2317 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2322 * Translate a guest virtual address to a guest physical address.
2324 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2325 struct kvm_translation *tr)
2327 unsigned long vaddr = tr->linear_address;
2331 mutex_lock(&vcpu->kvm->lock);
2332 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2333 tr->physical_address = gpa;
2334 tr->valid = gpa != UNMAPPED_GVA;
2337 mutex_unlock(&vcpu->kvm->lock);
2343 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2345 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2349 memcpy(fpu->fpr, fxsave->st_space, 128);
2350 fpu->fcw = fxsave->cwd;
2351 fpu->fsw = fxsave->swd;
2352 fpu->ftwx = fxsave->twd;
2353 fpu->last_opcode = fxsave->fop;
2354 fpu->last_ip = fxsave->rip;
2355 fpu->last_dp = fxsave->rdp;
2356 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2363 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2365 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2369 memcpy(fxsave->st_space, fpu->fpr, 128);
2370 fxsave->cwd = fpu->fcw;
2371 fxsave->swd = fpu->fsw;
2372 fxsave->twd = fpu->ftwx;
2373 fxsave->fop = fpu->last_opcode;
2374 fxsave->rip = fpu->last_ip;
2375 fxsave->rdp = fpu->last_dp;
2376 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2383 void fx_init(struct kvm_vcpu *vcpu)
2385 unsigned after_mxcsr_mask;
2387 /* Initialize guest FPU by resetting ours and saving into guest's */
2389 fx_save(&vcpu->host_fx_image);
2391 fx_save(&vcpu->guest_fx_image);
2392 fx_restore(&vcpu->host_fx_image);
2395 vcpu->cr0 |= X86_CR0_ET;
2396 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
2397 vcpu->guest_fx_image.mxcsr = 0x1f80;
2398 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
2399 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
2401 EXPORT_SYMBOL_GPL(fx_init);
2403 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
2405 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
2408 vcpu->guest_fpu_loaded = 1;
2409 fx_save(&vcpu->host_fx_image);
2410 fx_restore(&vcpu->guest_fx_image);
2412 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
2414 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
2416 if (!vcpu->guest_fpu_loaded)
2419 vcpu->guest_fpu_loaded = 0;
2420 fx_save(&vcpu->guest_fx_image);
2421 fx_restore(&vcpu->host_fx_image);
2423 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
2425 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
2427 kvm_x86_ops->vcpu_free(vcpu);
2430 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
2434 struct kvm_vcpu *vcpu = kvm_x86_ops->vcpu_create(kvm, id);
2441 /* We do fxsave: this must be aligned. */
2442 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2445 r = kvm_arch_vcpu_reset(vcpu);
2447 r = kvm_mmu_setup(vcpu);
2454 kvm_x86_ops->vcpu_free(vcpu);
2459 void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu)
2462 kvm_mmu_unload(vcpu);
2465 kvm_x86_ops->vcpu_free(vcpu);
2468 int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
2470 return kvm_x86_ops->vcpu_reset(vcpu);
2473 void kvm_arch_hardware_enable(void *garbage)
2475 kvm_x86_ops->hardware_enable(garbage);
2478 void kvm_arch_hardware_disable(void *garbage)
2480 kvm_x86_ops->hardware_disable(garbage);
2483 int kvm_arch_hardware_setup(void)
2485 return kvm_x86_ops->hardware_setup();
2488 void kvm_arch_hardware_unsetup(void)
2490 kvm_x86_ops->hardware_unsetup();
2493 void kvm_arch_check_processor_compat(void *rtn)
2495 kvm_x86_ops->check_processor_compatibility(rtn);
2498 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2504 BUG_ON(vcpu->kvm == NULL);
2507 vcpu->mmu.root_hpa = INVALID_PAGE;
2508 if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
2509 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
2511 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
2513 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
2518 vcpu->pio_data = page_address(page);
2520 r = kvm_mmu_create(vcpu);
2522 goto fail_free_pio_data;
2524 if (irqchip_in_kernel(kvm)) {
2525 r = kvm_create_lapic(vcpu);
2527 goto fail_mmu_destroy;
2533 kvm_mmu_destroy(vcpu);
2535 free_page((unsigned long)vcpu->pio_data);
2540 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
2542 kvm_free_lapic(vcpu);
2543 kvm_mmu_destroy(vcpu);
2544 free_page((unsigned long)vcpu->pio_data);