2 * Kernel-based Virtual Machine driver for Linux
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
7 * Copyright (C) 2006 Qumranet, Inc.
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
20 #include "x86_emulate.h"
21 #include "segment_descriptor.h"
24 #include <linux/kvm.h>
25 #include <linux/module.h>
26 #include <linux/errno.h>
27 #include <linux/percpu.h>
28 #include <linux/gfp.h>
30 #include <linux/miscdevice.h>
31 #include <linux/vmalloc.h>
32 #include <linux/reboot.h>
33 #include <linux/debugfs.h>
34 #include <linux/highmem.h>
35 #include <linux/file.h>
36 #include <linux/sysdev.h>
37 #include <linux/cpu.h>
38 #include <linux/sched.h>
39 #include <linux/cpumask.h>
40 #include <linux/smp.h>
41 #include <linux/anon_inodes.h>
42 #include <linux/profile.h>
43 #include <linux/kvm_para.h>
44 #include <linux/pagemap.h>
45 #include <linux/mman.h>
47 #include <asm/processor.h>
50 #include <asm/uaccess.h>
53 MODULE_AUTHOR("Qumranet");
54 MODULE_LICENSE("GPL");
56 static DEFINE_SPINLOCK(kvm_lock);
57 static LIST_HEAD(vm_list);
59 static cpumask_t cpus_hardware_enabled;
61 struct kvm_x86_ops *kvm_x86_ops;
62 struct kmem_cache *kvm_vcpu_cache;
63 EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
65 static __read_mostly struct preempt_ops kvm_preempt_ops;
67 #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
69 static struct kvm_stats_debugfs_item {
72 struct dentry *dentry;
73 } debugfs_entries[] = {
74 { "pf_fixed", STAT_OFFSET(pf_fixed) },
75 { "pf_guest", STAT_OFFSET(pf_guest) },
76 { "tlb_flush", STAT_OFFSET(tlb_flush) },
77 { "invlpg", STAT_OFFSET(invlpg) },
78 { "exits", STAT_OFFSET(exits) },
79 { "io_exits", STAT_OFFSET(io_exits) },
80 { "mmio_exits", STAT_OFFSET(mmio_exits) },
81 { "signal_exits", STAT_OFFSET(signal_exits) },
82 { "irq_window", STAT_OFFSET(irq_window_exits) },
83 { "halt_exits", STAT_OFFSET(halt_exits) },
84 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
85 { "request_irq", STAT_OFFSET(request_irq_exits) },
86 { "irq_exits", STAT_OFFSET(irq_exits) },
87 { "light_exits", STAT_OFFSET(light_exits) },
88 { "efer_reload", STAT_OFFSET(efer_reload) },
92 static struct dentry *debugfs_dir;
94 #define CR0_RESERVED_BITS \
95 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
96 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
97 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
98 #define CR4_RESERVED_BITS \
99 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
100 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
101 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
102 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
104 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
105 #define EFER_RESERVED_BITS 0xfffffffffffff2fe
108 /* LDT or TSS descriptor in the GDT. 16 bytes. */
109 struct segment_descriptor_64 {
110 struct segment_descriptor s;
117 static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
120 unsigned long segment_base(u16 selector)
122 struct descriptor_table gdt;
123 struct segment_descriptor *d;
124 unsigned long table_base;
130 asm("sgdt %0" : "=m"(gdt));
131 table_base = gdt.base;
133 if (selector & 4) { /* from ldt */
136 asm("sldt %0" : "=g"(ldt_selector));
137 table_base = segment_base(ldt_selector);
139 d = (struct segment_descriptor *)(table_base + (selector & ~7));
140 v = d->base_low | ((unsigned long)d->base_mid << 16) |
141 ((unsigned long)d->base_high << 24);
143 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
144 v |= ((unsigned long) \
145 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
149 EXPORT_SYMBOL_GPL(segment_base);
151 static inline int valid_vcpu(int n)
153 return likely(n >= 0 && n < KVM_MAX_VCPUS);
156 void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
158 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
161 vcpu->guest_fpu_loaded = 1;
162 fx_save(&vcpu->host_fx_image);
163 fx_restore(&vcpu->guest_fx_image);
165 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
167 void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
169 if (!vcpu->guest_fpu_loaded)
172 vcpu->guest_fpu_loaded = 0;
173 fx_save(&vcpu->guest_fx_image);
174 fx_restore(&vcpu->host_fx_image);
176 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
179 * Switches to specified vcpu, until a matching vcpu_put()
181 void vcpu_load(struct kvm_vcpu *vcpu)
185 mutex_lock(&vcpu->mutex);
187 preempt_notifier_register(&vcpu->preempt_notifier);
188 kvm_arch_vcpu_load(vcpu, cpu);
192 void vcpu_put(struct kvm_vcpu *vcpu)
195 kvm_arch_vcpu_put(vcpu);
196 preempt_notifier_unregister(&vcpu->preempt_notifier);
198 mutex_unlock(&vcpu->mutex);
201 static void ack_flush(void *_completed)
205 void kvm_flush_remote_tlbs(struct kvm *kvm)
209 struct kvm_vcpu *vcpu;
212 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
213 vcpu = kvm->vcpus[i];
216 if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
219 if (cpu != -1 && cpu != raw_smp_processor_id())
222 smp_call_function_mask(cpus, ack_flush, NULL, 1);
225 int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
230 mutex_init(&vcpu->mutex);
232 vcpu->mmu.root_hpa = INVALID_PAGE;
235 if (!irqchip_in_kernel(kvm) || id == 0)
236 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
238 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
239 init_waitqueue_head(&vcpu->wq);
241 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
246 vcpu->run = page_address(page);
248 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
253 vcpu->pio_data = page_address(page);
255 r = kvm_mmu_create(vcpu);
257 goto fail_free_pio_data;
259 if (irqchip_in_kernel(kvm)) {
260 r = kvm_create_lapic(vcpu);
262 goto fail_mmu_destroy;
268 kvm_mmu_destroy(vcpu);
270 free_page((unsigned long)vcpu->pio_data);
272 free_page((unsigned long)vcpu->run);
276 EXPORT_SYMBOL_GPL(kvm_vcpu_init);
278 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
280 kvm_free_lapic(vcpu);
281 kvm_mmu_destroy(vcpu);
282 free_page((unsigned long)vcpu->pio_data);
283 free_page((unsigned long)vcpu->run);
285 EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
287 static struct kvm *kvm_create_vm(void)
289 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
292 return ERR_PTR(-ENOMEM);
294 kvm_io_bus_init(&kvm->pio_bus);
295 mutex_init(&kvm->lock);
296 INIT_LIST_HEAD(&kvm->active_mmu_pages);
297 kvm_io_bus_init(&kvm->mmio_bus);
298 spin_lock(&kvm_lock);
299 list_add(&kvm->vm_list, &vm_list);
300 spin_unlock(&kvm_lock);
305 * Free any memory in @free but not in @dont.
307 static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
308 struct kvm_memory_slot *dont)
310 if (!dont || free->rmap != dont->rmap)
313 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
314 vfree(free->dirty_bitmap);
317 free->dirty_bitmap = NULL;
321 static void kvm_free_physmem(struct kvm *kvm)
325 for (i = 0; i < kvm->nmemslots; ++i)
326 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
329 static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
333 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
334 if (vcpu->pio.guest_pages[i]) {
335 kvm_release_page(vcpu->pio.guest_pages[i]);
336 vcpu->pio.guest_pages[i] = NULL;
340 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
343 kvm_mmu_unload(vcpu);
347 static void kvm_free_vcpus(struct kvm *kvm)
352 * Unpin any mmu pages first.
354 for (i = 0; i < KVM_MAX_VCPUS; ++i)
356 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
357 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
359 kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
360 kvm->vcpus[i] = NULL;
366 static void kvm_destroy_vm(struct kvm *kvm)
368 spin_lock(&kvm_lock);
369 list_del(&kvm->vm_list);
370 spin_unlock(&kvm_lock);
371 kvm_io_bus_destroy(&kvm->pio_bus);
372 kvm_io_bus_destroy(&kvm->mmio_bus);
376 kvm_free_physmem(kvm);
380 static int kvm_vm_release(struct inode *inode, struct file *filp)
382 struct kvm *kvm = filp->private_data;
388 static void inject_gp(struct kvm_vcpu *vcpu)
390 kvm_x86_ops->inject_gp(vcpu, 0);
394 * Load the pae pdptrs. Return true is they are all valid.
396 static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
398 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
399 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
402 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
404 mutex_lock(&vcpu->kvm->lock);
405 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
406 offset * sizeof(u64), sizeof(pdpte));
411 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
412 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
419 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
421 mutex_unlock(&vcpu->kvm->lock);
426 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
428 if (cr0 & CR0_RESERVED_BITS) {
429 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
435 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
436 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
441 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
442 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
443 "and a clear PE flag\n");
448 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
450 if ((vcpu->shadow_efer & EFER_LME)) {
454 printk(KERN_DEBUG "set_cr0: #GP, start paging "
455 "in long mode while PAE is disabled\n");
459 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
461 printk(KERN_DEBUG "set_cr0: #GP, start paging "
462 "in long mode while CS.L == 1\n");
469 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
470 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
478 kvm_x86_ops->set_cr0(vcpu, cr0);
481 mutex_lock(&vcpu->kvm->lock);
482 kvm_mmu_reset_context(vcpu);
483 mutex_unlock(&vcpu->kvm->lock);
486 EXPORT_SYMBOL_GPL(set_cr0);
488 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
490 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
492 EXPORT_SYMBOL_GPL(lmsw);
494 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
496 if (cr4 & CR4_RESERVED_BITS) {
497 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
502 if (is_long_mode(vcpu)) {
503 if (!(cr4 & X86_CR4_PAE)) {
504 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
509 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
510 && !load_pdptrs(vcpu, vcpu->cr3)) {
511 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
516 if (cr4 & X86_CR4_VMXE) {
517 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
521 kvm_x86_ops->set_cr4(vcpu, cr4);
523 mutex_lock(&vcpu->kvm->lock);
524 kvm_mmu_reset_context(vcpu);
525 mutex_unlock(&vcpu->kvm->lock);
527 EXPORT_SYMBOL_GPL(set_cr4);
529 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
531 if (is_long_mode(vcpu)) {
532 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
533 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
539 if (cr3 & CR3_PAE_RESERVED_BITS) {
541 "set_cr3: #GP, reserved bits\n");
545 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
546 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
553 * We don't check reserved bits in nonpae mode, because
554 * this isn't enforced, and VMware depends on this.
558 mutex_lock(&vcpu->kvm->lock);
560 * Does the new cr3 value map to physical memory? (Note, we
561 * catch an invalid cr3 even in real-mode, because it would
562 * cause trouble later on when we turn on paging anyway.)
564 * A real CPU would silently accept an invalid cr3 and would
565 * attempt to use it - with largely undefined (and often hard
566 * to debug) behavior on the guest side.
568 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
572 vcpu->mmu.new_cr3(vcpu);
574 mutex_unlock(&vcpu->kvm->lock);
576 EXPORT_SYMBOL_GPL(set_cr3);
578 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
580 if (cr8 & CR8_RESERVED_BITS) {
581 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
585 if (irqchip_in_kernel(vcpu->kvm))
586 kvm_lapic_set_tpr(vcpu, cr8);
590 EXPORT_SYMBOL_GPL(set_cr8);
592 unsigned long get_cr8(struct kvm_vcpu *vcpu)
594 if (irqchip_in_kernel(vcpu->kvm))
595 return kvm_lapic_get_cr8(vcpu);
599 EXPORT_SYMBOL_GPL(get_cr8);
601 u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
603 if (irqchip_in_kernel(vcpu->kvm))
604 return vcpu->apic_base;
606 return vcpu->apic_base;
608 EXPORT_SYMBOL_GPL(kvm_get_apic_base);
610 void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
612 /* TODO: reserve bits check */
613 if (irqchip_in_kernel(vcpu->kvm))
614 kvm_lapic_set_base(vcpu, data);
616 vcpu->apic_base = data;
618 EXPORT_SYMBOL_GPL(kvm_set_apic_base);
620 void fx_init(struct kvm_vcpu *vcpu)
622 unsigned after_mxcsr_mask;
624 /* Initialize guest FPU by resetting ours and saving into guest's */
626 fx_save(&vcpu->host_fx_image);
628 fx_save(&vcpu->guest_fx_image);
629 fx_restore(&vcpu->host_fx_image);
632 vcpu->cr0 |= X86_CR0_ET;
633 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
634 vcpu->guest_fx_image.mxcsr = 0x1f80;
635 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
636 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
638 EXPORT_SYMBOL_GPL(fx_init);
641 * Allocate some memory and give it an address in the guest physical address
644 * Discontiguous memory is allowed, mostly for framebuffers.
646 static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
648 kvm_userspace_memory_region *mem,
653 unsigned long npages;
655 struct kvm_memory_slot *memslot;
656 struct kvm_memory_slot old, new;
659 /* General sanity checks */
660 if (mem->memory_size & (PAGE_SIZE - 1))
662 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
664 if (mem->slot >= KVM_MEMORY_SLOTS)
666 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
669 memslot = &kvm->memslots[mem->slot];
670 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
671 npages = mem->memory_size >> PAGE_SHIFT;
674 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
676 mutex_lock(&kvm->lock);
678 new = old = *memslot;
680 new.base_gfn = base_gfn;
682 new.flags = mem->flags;
684 /* Disallow changing a memory slot's size. */
686 if (npages && old.npages && npages != old.npages)
689 /* Check for overlaps */
691 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
692 struct kvm_memory_slot *s = &kvm->memslots[i];
696 if (!((base_gfn + npages <= s->base_gfn) ||
697 (base_gfn >= s->base_gfn + s->npages)))
701 /* Free page dirty bitmap if unneeded */
702 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
703 new.dirty_bitmap = NULL;
707 /* Allocate if a slot is being created */
708 if (npages && !new.rmap) {
709 new.rmap = vmalloc(npages * sizeof(struct page *));
714 memset(new.rmap, 0, npages * sizeof(*new.rmap));
716 new.user_alloc = user_alloc;
718 new.userspace_addr = mem->userspace_addr;
720 down_write(¤t->mm->mmap_sem);
721 new.userspace_addr = do_mmap(NULL, 0,
723 PROT_READ | PROT_WRITE,
724 MAP_SHARED | MAP_ANONYMOUS,
726 up_write(¤t->mm->mmap_sem);
728 if (IS_ERR((void *)new.userspace_addr))
732 if (!old.user_alloc && old.rmap) {
735 down_write(¤t->mm->mmap_sem);
736 ret = do_munmap(current->mm, old.userspace_addr,
737 old.npages * PAGE_SIZE);
738 up_write(¤t->mm->mmap_sem);
741 "kvm_vm_ioctl_set_memory_region: "
742 "failed to munmap memory\n");
746 /* Allocate page dirty bitmap if needed */
747 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
748 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
750 new.dirty_bitmap = vmalloc(dirty_bytes);
751 if (!new.dirty_bitmap)
753 memset(new.dirty_bitmap, 0, dirty_bytes);
756 if (mem->slot >= kvm->nmemslots)
757 kvm->nmemslots = mem->slot + 1;
759 if (!kvm->n_requested_mmu_pages) {
760 unsigned int n_pages;
763 n_pages = npages * KVM_PERMILLE_MMU_PAGES / 1000;
764 kvm_mmu_change_mmu_pages(kvm, kvm->n_alloc_mmu_pages +
767 unsigned int nr_mmu_pages;
769 n_pages = old.npages * KVM_PERMILLE_MMU_PAGES / 1000;
770 nr_mmu_pages = kvm->n_alloc_mmu_pages - n_pages;
771 nr_mmu_pages = max(nr_mmu_pages,
772 (unsigned int) KVM_MIN_ALLOC_MMU_PAGES);
773 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
779 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
780 kvm_flush_remote_tlbs(kvm);
782 mutex_unlock(&kvm->lock);
784 kvm_free_physmem_slot(&old, &new);
788 mutex_unlock(&kvm->lock);
789 kvm_free_physmem_slot(&new, &old);
794 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
795 u32 kvm_nr_mmu_pages)
797 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
800 mutex_lock(&kvm->lock);
802 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
803 kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
805 mutex_unlock(&kvm->lock);
809 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
811 return kvm->n_alloc_mmu_pages;
815 * Get (and clear) the dirty memory log for a memory slot.
817 static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
818 struct kvm_dirty_log *log)
820 struct kvm_memory_slot *memslot;
823 unsigned long any = 0;
825 mutex_lock(&kvm->lock);
828 if (log->slot >= KVM_MEMORY_SLOTS)
831 memslot = &kvm->memslots[log->slot];
833 if (!memslot->dirty_bitmap)
836 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
838 for (i = 0; !any && i < n/sizeof(long); ++i)
839 any = memslot->dirty_bitmap[i];
842 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
845 /* If nothing is dirty, don't bother messing with page tables. */
847 kvm_mmu_slot_remove_write_access(kvm, log->slot);
848 kvm_flush_remote_tlbs(kvm);
849 memset(memslot->dirty_bitmap, 0, n);
855 mutex_unlock(&kvm->lock);
860 * Set a new alias region. Aliases map a portion of physical memory into
861 * another portion. This is useful for memory windows, for example the PC
864 static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
865 struct kvm_memory_alias *alias)
868 struct kvm_mem_alias *p;
871 /* General sanity checks */
872 if (alias->memory_size & (PAGE_SIZE - 1))
874 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
876 if (alias->slot >= KVM_ALIAS_SLOTS)
878 if (alias->guest_phys_addr + alias->memory_size
879 < alias->guest_phys_addr)
881 if (alias->target_phys_addr + alias->memory_size
882 < alias->target_phys_addr)
885 mutex_lock(&kvm->lock);
887 p = &kvm->aliases[alias->slot];
888 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
889 p->npages = alias->memory_size >> PAGE_SHIFT;
890 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
892 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
893 if (kvm->aliases[n - 1].npages)
897 kvm_mmu_zap_all(kvm);
899 mutex_unlock(&kvm->lock);
907 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
912 switch (chip->chip_id) {
913 case KVM_IRQCHIP_PIC_MASTER:
914 memcpy(&chip->chip.pic,
915 &pic_irqchip(kvm)->pics[0],
916 sizeof(struct kvm_pic_state));
918 case KVM_IRQCHIP_PIC_SLAVE:
919 memcpy(&chip->chip.pic,
920 &pic_irqchip(kvm)->pics[1],
921 sizeof(struct kvm_pic_state));
923 case KVM_IRQCHIP_IOAPIC:
924 memcpy(&chip->chip.ioapic,
926 sizeof(struct kvm_ioapic_state));
935 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
940 switch (chip->chip_id) {
941 case KVM_IRQCHIP_PIC_MASTER:
942 memcpy(&pic_irqchip(kvm)->pics[0],
944 sizeof(struct kvm_pic_state));
946 case KVM_IRQCHIP_PIC_SLAVE:
947 memcpy(&pic_irqchip(kvm)->pics[1],
949 sizeof(struct kvm_pic_state));
951 case KVM_IRQCHIP_IOAPIC:
952 memcpy(ioapic_irqchip(kvm),
954 sizeof(struct kvm_ioapic_state));
960 kvm_pic_update_irq(pic_irqchip(kvm));
964 int is_error_page(struct page *page)
966 return page == bad_page;
968 EXPORT_SYMBOL_GPL(is_error_page);
970 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
973 struct kvm_mem_alias *alias;
975 for (i = 0; i < kvm->naliases; ++i) {
976 alias = &kvm->aliases[i];
977 if (gfn >= alias->base_gfn
978 && gfn < alias->base_gfn + alias->npages)
979 return alias->target_gfn + gfn - alias->base_gfn;
984 static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
988 for (i = 0; i < kvm->nmemslots; ++i) {
989 struct kvm_memory_slot *memslot = &kvm->memslots[i];
991 if (gfn >= memslot->base_gfn
992 && gfn < memslot->base_gfn + memslot->npages)
998 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
1000 gfn = unalias_gfn(kvm, gfn);
1001 return __gfn_to_memslot(kvm, gfn);
1004 struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
1006 struct kvm_memory_slot *slot;
1007 struct page *page[1];
1012 gfn = unalias_gfn(kvm, gfn);
1013 slot = __gfn_to_memslot(kvm, gfn);
1019 down_read(¤t->mm->mmap_sem);
1020 npages = get_user_pages(current, current->mm,
1021 slot->userspace_addr
1022 + (gfn - slot->base_gfn) * PAGE_SIZE, 1,
1024 up_read(¤t->mm->mmap_sem);
1032 EXPORT_SYMBOL_GPL(gfn_to_page);
1034 void kvm_release_page(struct page *page)
1036 if (!PageReserved(page))
1040 EXPORT_SYMBOL_GPL(kvm_release_page);
1042 static int next_segment(unsigned long len, int offset)
1044 if (len > PAGE_SIZE - offset)
1045 return PAGE_SIZE - offset;
1050 int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
1056 page = gfn_to_page(kvm, gfn);
1057 if (is_error_page(page)) {
1058 kvm_release_page(page);
1061 page_virt = kmap_atomic(page, KM_USER0);
1063 memcpy(data, page_virt + offset, len);
1065 kunmap_atomic(page_virt, KM_USER0);
1066 kvm_release_page(page);
1069 EXPORT_SYMBOL_GPL(kvm_read_guest_page);
1071 int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
1073 gfn_t gfn = gpa >> PAGE_SHIFT;
1075 int offset = offset_in_page(gpa);
1078 while ((seg = next_segment(len, offset)) != 0) {
1079 ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
1089 EXPORT_SYMBOL_GPL(kvm_read_guest);
1091 int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
1092 int offset, int len)
1097 page = gfn_to_page(kvm, gfn);
1098 if (is_error_page(page)) {
1099 kvm_release_page(page);
1102 page_virt = kmap_atomic(page, KM_USER0);
1104 memcpy(page_virt + offset, data, len);
1106 kunmap_atomic(page_virt, KM_USER0);
1107 mark_page_dirty(kvm, gfn);
1108 kvm_release_page(page);
1111 EXPORT_SYMBOL_GPL(kvm_write_guest_page);
1113 int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
1116 gfn_t gfn = gpa >> PAGE_SHIFT;
1118 int offset = offset_in_page(gpa);
1121 while ((seg = next_segment(len, offset)) != 0) {
1122 ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
1133 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
1138 page = gfn_to_page(kvm, gfn);
1139 if (is_error_page(page)) {
1140 kvm_release_page(page);
1143 page_virt = kmap_atomic(page, KM_USER0);
1145 memset(page_virt + offset, 0, len);
1147 kunmap_atomic(page_virt, KM_USER0);
1148 kvm_release_page(page);
1151 EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
1153 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
1155 gfn_t gfn = gpa >> PAGE_SHIFT;
1157 int offset = offset_in_page(gpa);
1160 while ((seg = next_segment(len, offset)) != 0) {
1161 ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
1170 EXPORT_SYMBOL_GPL(kvm_clear_guest);
1172 /* WARNING: Does not work on aliased pages. */
1173 void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
1175 struct kvm_memory_slot *memslot;
1177 memslot = __gfn_to_memslot(kvm, gfn);
1178 if (memslot && memslot->dirty_bitmap) {
1179 unsigned long rel_gfn = gfn - memslot->base_gfn;
1182 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
1183 set_bit(rel_gfn, memslot->dirty_bitmap);
1187 int emulator_read_std(unsigned long addr,
1190 struct kvm_vcpu *vcpu)
1195 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1196 unsigned offset = addr & (PAGE_SIZE-1);
1197 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1200 if (gpa == UNMAPPED_GVA)
1201 return X86EMUL_PROPAGATE_FAULT;
1202 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1204 return X86EMUL_UNHANDLEABLE;
1211 return X86EMUL_CONTINUE;
1213 EXPORT_SYMBOL_GPL(emulator_read_std);
1215 static int emulator_write_std(unsigned long addr,
1218 struct kvm_vcpu *vcpu)
1220 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
1221 return X86EMUL_UNHANDLEABLE;
1225 * Only apic need an MMIO device hook, so shortcut now..
1227 static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1230 struct kvm_io_device *dev;
1233 dev = &vcpu->apic->dev;
1234 if (dev->in_range(dev, addr))
1240 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1243 struct kvm_io_device *dev;
1245 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1247 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1251 static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1254 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1257 static int emulator_read_emulated(unsigned long addr,
1260 struct kvm_vcpu *vcpu)
1262 struct kvm_io_device *mmio_dev;
1265 if (vcpu->mmio_read_completed) {
1266 memcpy(val, vcpu->mmio_data, bytes);
1267 vcpu->mmio_read_completed = 0;
1268 return X86EMUL_CONTINUE;
1269 } else if (emulator_read_std(addr, val, bytes, vcpu)
1270 == X86EMUL_CONTINUE)
1271 return X86EMUL_CONTINUE;
1273 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1274 if (gpa == UNMAPPED_GVA)
1275 return X86EMUL_PROPAGATE_FAULT;
1278 * Is this MMIO handled locally?
1280 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1282 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1283 return X86EMUL_CONTINUE;
1286 vcpu->mmio_needed = 1;
1287 vcpu->mmio_phys_addr = gpa;
1288 vcpu->mmio_size = bytes;
1289 vcpu->mmio_is_write = 0;
1291 return X86EMUL_UNHANDLEABLE;
1294 static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1295 const void *val, int bytes)
1299 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1302 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1306 static int emulator_write_emulated_onepage(unsigned long addr,
1309 struct kvm_vcpu *vcpu)
1311 struct kvm_io_device *mmio_dev;
1312 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1314 if (gpa == UNMAPPED_GVA) {
1315 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
1316 return X86EMUL_PROPAGATE_FAULT;
1319 if (emulator_write_phys(vcpu, gpa, val, bytes))
1320 return X86EMUL_CONTINUE;
1323 * Is this MMIO handled locally?
1325 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1327 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1328 return X86EMUL_CONTINUE;
1331 vcpu->mmio_needed = 1;
1332 vcpu->mmio_phys_addr = gpa;
1333 vcpu->mmio_size = bytes;
1334 vcpu->mmio_is_write = 1;
1335 memcpy(vcpu->mmio_data, val, bytes);
1337 return X86EMUL_CONTINUE;
1340 int emulator_write_emulated(unsigned long addr,
1343 struct kvm_vcpu *vcpu)
1345 /* Crossing a page boundary? */
1346 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1349 now = -addr & ~PAGE_MASK;
1350 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1351 if (rc != X86EMUL_CONTINUE)
1357 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1359 EXPORT_SYMBOL_GPL(emulator_write_emulated);
1361 static int emulator_cmpxchg_emulated(unsigned long addr,
1365 struct kvm_vcpu *vcpu)
1367 static int reported;
1371 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1373 return emulator_write_emulated(addr, new, bytes, vcpu);
1376 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1378 return kvm_x86_ops->get_segment_base(vcpu, seg);
1381 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1383 return X86EMUL_CONTINUE;
1386 int emulate_clts(struct kvm_vcpu *vcpu)
1388 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
1389 return X86EMUL_CONTINUE;
1392 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1394 struct kvm_vcpu *vcpu = ctxt->vcpu;
1398 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1399 return X86EMUL_CONTINUE;
1401 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1402 return X86EMUL_UNHANDLEABLE;
1406 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1408 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1411 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1413 /* FIXME: better handling */
1414 return X86EMUL_UNHANDLEABLE;
1416 return X86EMUL_CONTINUE;
1419 void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1421 static int reported;
1423 unsigned long rip = vcpu->rip;
1424 unsigned long rip_linear;
1426 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1431 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1433 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1434 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1437 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1439 struct x86_emulate_ops emulate_ops = {
1440 .read_std = emulator_read_std,
1441 .write_std = emulator_write_std,
1442 .read_emulated = emulator_read_emulated,
1443 .write_emulated = emulator_write_emulated,
1444 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1447 int emulate_instruction(struct kvm_vcpu *vcpu,
1448 struct kvm_run *run,
1455 vcpu->mmio_fault_cr2 = cr2;
1456 kvm_x86_ops->cache_regs(vcpu);
1458 vcpu->mmio_is_write = 0;
1459 vcpu->pio.string = 0;
1463 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1465 vcpu->emulate_ctxt.vcpu = vcpu;
1466 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1467 vcpu->emulate_ctxt.cr2 = cr2;
1468 vcpu->emulate_ctxt.mode =
1469 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1470 ? X86EMUL_MODE_REAL : cs_l
1471 ? X86EMUL_MODE_PROT64 : cs_db
1472 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1474 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1475 vcpu->emulate_ctxt.cs_base = 0;
1476 vcpu->emulate_ctxt.ds_base = 0;
1477 vcpu->emulate_ctxt.es_base = 0;
1478 vcpu->emulate_ctxt.ss_base = 0;
1480 vcpu->emulate_ctxt.cs_base =
1481 get_segment_base(vcpu, VCPU_SREG_CS);
1482 vcpu->emulate_ctxt.ds_base =
1483 get_segment_base(vcpu, VCPU_SREG_DS);
1484 vcpu->emulate_ctxt.es_base =
1485 get_segment_base(vcpu, VCPU_SREG_ES);
1486 vcpu->emulate_ctxt.ss_base =
1487 get_segment_base(vcpu, VCPU_SREG_SS);
1490 vcpu->emulate_ctxt.gs_base =
1491 get_segment_base(vcpu, VCPU_SREG_GS);
1492 vcpu->emulate_ctxt.fs_base =
1493 get_segment_base(vcpu, VCPU_SREG_FS);
1495 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
1497 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1498 return EMULATE_DONE;
1499 return EMULATE_FAIL;
1503 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1505 if (vcpu->pio.string)
1506 return EMULATE_DO_MMIO;
1508 if ((r || vcpu->mmio_is_write) && run) {
1509 run->exit_reason = KVM_EXIT_MMIO;
1510 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1511 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1512 run->mmio.len = vcpu->mmio_size;
1513 run->mmio.is_write = vcpu->mmio_is_write;
1517 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1518 return EMULATE_DONE;
1519 if (!vcpu->mmio_needed) {
1520 kvm_report_emulation_failure(vcpu, "mmio");
1521 return EMULATE_FAIL;
1523 return EMULATE_DO_MMIO;
1526 kvm_x86_ops->decache_regs(vcpu);
1527 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
1529 if (vcpu->mmio_is_write) {
1530 vcpu->mmio_needed = 0;
1531 return EMULATE_DO_MMIO;
1534 return EMULATE_DONE;
1536 EXPORT_SYMBOL_GPL(emulate_instruction);
1539 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1541 static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
1543 DECLARE_WAITQUEUE(wait, current);
1545 add_wait_queue(&vcpu->wq, &wait);
1548 * We will block until either an interrupt or a signal wakes us up
1550 while (!kvm_cpu_has_interrupt(vcpu)
1551 && !signal_pending(current)
1552 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
1553 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
1554 set_current_state(TASK_INTERRUPTIBLE);
1560 __set_current_state(TASK_RUNNING);
1561 remove_wait_queue(&vcpu->wq, &wait);
1564 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1566 ++vcpu->stat.halt_exits;
1567 if (irqchip_in_kernel(vcpu->kvm)) {
1568 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1569 kvm_vcpu_block(vcpu);
1570 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1574 vcpu->run->exit_reason = KVM_EXIT_HLT;
1578 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1580 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
1582 unsigned long nr, a0, a1, a2, a3, ret;
1584 kvm_x86_ops->cache_regs(vcpu);
1586 nr = vcpu->regs[VCPU_REGS_RAX];
1587 a0 = vcpu->regs[VCPU_REGS_RBX];
1588 a1 = vcpu->regs[VCPU_REGS_RCX];
1589 a2 = vcpu->regs[VCPU_REGS_RDX];
1590 a3 = vcpu->regs[VCPU_REGS_RSI];
1592 if (!is_long_mode(vcpu)) {
1605 vcpu->regs[VCPU_REGS_RAX] = ret;
1606 kvm_x86_ops->decache_regs(vcpu);
1609 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1611 int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1613 char instruction[3];
1616 mutex_lock(&vcpu->kvm->lock);
1619 * Blow out the MMU to ensure that no other VCPU has an active mapping
1620 * to ensure that the updated hypercall appears atomically across all
1623 kvm_mmu_zap_all(vcpu->kvm);
1625 kvm_x86_ops->cache_regs(vcpu);
1626 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1627 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1628 != X86EMUL_CONTINUE)
1631 mutex_unlock(&vcpu->kvm->lock);
1636 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1638 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1641 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1643 struct descriptor_table dt = { limit, base };
1645 kvm_x86_ops->set_gdt(vcpu, &dt);
1648 void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1650 struct descriptor_table dt = { limit, base };
1652 kvm_x86_ops->set_idt(vcpu, &dt);
1655 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1656 unsigned long *rflags)
1659 *rflags = kvm_x86_ops->get_rflags(vcpu);
1662 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1664 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
1675 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1680 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1681 unsigned long *rflags)
1685 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
1686 *rflags = kvm_x86_ops->get_rflags(vcpu);
1695 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1698 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1702 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1707 case 0xc0010010: /* SYSCFG */
1708 case 0xc0010015: /* HWCR */
1709 case MSR_IA32_PLATFORM_ID:
1710 case MSR_IA32_P5_MC_ADDR:
1711 case MSR_IA32_P5_MC_TYPE:
1712 case MSR_IA32_MC0_CTL:
1713 case MSR_IA32_MCG_STATUS:
1714 case MSR_IA32_MCG_CAP:
1715 case MSR_IA32_MC0_MISC:
1716 case MSR_IA32_MC0_MISC+4:
1717 case MSR_IA32_MC0_MISC+8:
1718 case MSR_IA32_MC0_MISC+12:
1719 case MSR_IA32_MC0_MISC+16:
1720 case MSR_IA32_UCODE_REV:
1721 case MSR_IA32_PERF_STATUS:
1722 case MSR_IA32_EBL_CR_POWERON:
1723 /* MTRR registers */
1725 case 0x200 ... 0x2ff:
1728 case 0xcd: /* fsb frequency */
1731 case MSR_IA32_APICBASE:
1732 data = kvm_get_apic_base(vcpu);
1734 case MSR_IA32_MISC_ENABLE:
1735 data = vcpu->ia32_misc_enable_msr;
1737 #ifdef CONFIG_X86_64
1739 data = vcpu->shadow_efer;
1743 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
1749 EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1752 * Reads an msr value (of 'msr_index') into 'pdata'.
1753 * Returns 0 on success, non-0 otherwise.
1754 * Assumes vcpu_load() was already called.
1756 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1758 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
1761 #ifdef CONFIG_X86_64
1763 static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
1765 if (efer & EFER_RESERVED_BITS) {
1766 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1773 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1774 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1779 kvm_x86_ops->set_efer(vcpu, efer);
1782 efer |= vcpu->shadow_efer & EFER_LMA;
1784 vcpu->shadow_efer = efer;
1789 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1792 #ifdef CONFIG_X86_64
1794 set_efer(vcpu, data);
1797 case MSR_IA32_MC0_STATUS:
1798 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
1799 __FUNCTION__, data);
1801 case MSR_IA32_MCG_STATUS:
1802 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
1803 __FUNCTION__, data);
1805 case MSR_IA32_UCODE_REV:
1806 case MSR_IA32_UCODE_WRITE:
1807 case 0x200 ... 0x2ff: /* MTRRs */
1809 case MSR_IA32_APICBASE:
1810 kvm_set_apic_base(vcpu, data);
1812 case MSR_IA32_MISC_ENABLE:
1813 vcpu->ia32_misc_enable_msr = data;
1816 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
1821 EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1824 * Writes msr value into into the appropriate "register".
1825 * Returns 0 on success, non-0 otherwise.
1826 * Assumes vcpu_load() was already called.
1828 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1830 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
1833 void kvm_resched(struct kvm_vcpu *vcpu)
1835 if (!need_resched())
1839 EXPORT_SYMBOL_GPL(kvm_resched);
1841 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1845 struct kvm_cpuid_entry *e, *best;
1847 kvm_x86_ops->cache_regs(vcpu);
1848 function = vcpu->regs[VCPU_REGS_RAX];
1849 vcpu->regs[VCPU_REGS_RAX] = 0;
1850 vcpu->regs[VCPU_REGS_RBX] = 0;
1851 vcpu->regs[VCPU_REGS_RCX] = 0;
1852 vcpu->regs[VCPU_REGS_RDX] = 0;
1854 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1855 e = &vcpu->cpuid_entries[i];
1856 if (e->function == function) {
1861 * Both basic or both extended?
1863 if (((e->function ^ function) & 0x80000000) == 0)
1864 if (!best || e->function > best->function)
1868 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1869 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1870 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1871 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1873 kvm_x86_ops->decache_regs(vcpu);
1874 kvm_x86_ops->skip_emulated_instruction(vcpu);
1876 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1878 static int pio_copy_data(struct kvm_vcpu *vcpu)
1880 void *p = vcpu->pio_data;
1883 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1885 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1888 free_pio_guest_pages(vcpu);
1891 q += vcpu->pio.guest_page_offset;
1892 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1894 memcpy(q, p, bytes);
1896 memcpy(p, q, bytes);
1897 q -= vcpu->pio.guest_page_offset;
1899 free_pio_guest_pages(vcpu);
1903 static int complete_pio(struct kvm_vcpu *vcpu)
1905 struct kvm_pio_request *io = &vcpu->pio;
1909 kvm_x86_ops->cache_regs(vcpu);
1913 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
1917 r = pio_copy_data(vcpu);
1919 kvm_x86_ops->cache_regs(vcpu);
1926 delta *= io->cur_count;
1928 * The size of the register should really depend on
1929 * current address size.
1931 vcpu->regs[VCPU_REGS_RCX] -= delta;
1937 vcpu->regs[VCPU_REGS_RDI] += delta;
1939 vcpu->regs[VCPU_REGS_RSI] += delta;
1942 kvm_x86_ops->decache_regs(vcpu);
1944 io->count -= io->cur_count;
1950 static void kernel_pio(struct kvm_io_device *pio_dev,
1951 struct kvm_vcpu *vcpu,
1954 /* TODO: String I/O for in kernel device */
1956 mutex_lock(&vcpu->kvm->lock);
1958 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1962 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1965 mutex_unlock(&vcpu->kvm->lock);
1968 static void pio_string_write(struct kvm_io_device *pio_dev,
1969 struct kvm_vcpu *vcpu)
1971 struct kvm_pio_request *io = &vcpu->pio;
1972 void *pd = vcpu->pio_data;
1975 mutex_lock(&vcpu->kvm->lock);
1976 for (i = 0; i < io->cur_count; i++) {
1977 kvm_iodevice_write(pio_dev, io->port,
1982 mutex_unlock(&vcpu->kvm->lock);
1985 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1986 int size, unsigned port)
1988 struct kvm_io_device *pio_dev;
1990 vcpu->run->exit_reason = KVM_EXIT_IO;
1991 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1992 vcpu->run->io.size = vcpu->pio.size = size;
1993 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1994 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1995 vcpu->run->io.port = vcpu->pio.port = port;
1997 vcpu->pio.string = 0;
1999 vcpu->pio.guest_page_offset = 0;
2002 kvm_x86_ops->cache_regs(vcpu);
2003 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
2004 kvm_x86_ops->decache_regs(vcpu);
2006 kvm_x86_ops->skip_emulated_instruction(vcpu);
2008 pio_dev = vcpu_find_pio_dev(vcpu, port);
2010 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
2016 EXPORT_SYMBOL_GPL(kvm_emulate_pio);
2018 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2019 int size, unsigned long count, int down,
2020 gva_t address, int rep, unsigned port)
2022 unsigned now, in_page;
2026 struct kvm_io_device *pio_dev;
2028 vcpu->run->exit_reason = KVM_EXIT_IO;
2029 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
2030 vcpu->run->io.size = vcpu->pio.size = size;
2031 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
2032 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
2033 vcpu->run->io.port = vcpu->pio.port = port;
2035 vcpu->pio.string = 1;
2036 vcpu->pio.down = down;
2037 vcpu->pio.guest_page_offset = offset_in_page(address);
2038 vcpu->pio.rep = rep;
2041 kvm_x86_ops->skip_emulated_instruction(vcpu);
2046 in_page = PAGE_SIZE - offset_in_page(address);
2048 in_page = offset_in_page(address) + size;
2049 now = min(count, (unsigned long)in_page / size);
2052 * String I/O straddles page boundary. Pin two guest pages
2053 * so that we satisfy atomicity constraints. Do just one
2054 * transaction to avoid complexity.
2061 * String I/O in reverse. Yuck. Kill the guest, fix later.
2063 pr_unimpl(vcpu, "guest string pio down\n");
2067 vcpu->run->io.count = now;
2068 vcpu->pio.cur_count = now;
2070 if (vcpu->pio.cur_count == vcpu->pio.count)
2071 kvm_x86_ops->skip_emulated_instruction(vcpu);
2073 for (i = 0; i < nr_pages; ++i) {
2074 mutex_lock(&vcpu->kvm->lock);
2075 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
2076 vcpu->pio.guest_pages[i] = page;
2077 mutex_unlock(&vcpu->kvm->lock);
2080 free_pio_guest_pages(vcpu);
2085 pio_dev = vcpu_find_pio_dev(vcpu, port);
2086 if (!vcpu->pio.in) {
2087 /* string PIO write */
2088 ret = pio_copy_data(vcpu);
2089 if (ret >= 0 && pio_dev) {
2090 pio_string_write(pio_dev, vcpu);
2092 if (vcpu->pio.count == 0)
2096 pr_unimpl(vcpu, "no string pio read support yet, "
2097 "port %x size %d count %ld\n",
2102 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
2105 * Check if userspace requested an interrupt window, and that the
2106 * interrupt window is open.
2108 * No need to exit to userspace if we already have an interrupt queued.
2110 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2111 struct kvm_run *kvm_run)
2113 return (!vcpu->irq_summary &&
2114 kvm_run->request_interrupt_window &&
2115 vcpu->interrupt_window_open &&
2116 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
2119 static void post_kvm_run_save(struct kvm_vcpu *vcpu,
2120 struct kvm_run *kvm_run)
2122 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2123 kvm_run->cr8 = get_cr8(vcpu);
2124 kvm_run->apic_base = kvm_get_apic_base(vcpu);
2125 if (irqchip_in_kernel(vcpu->kvm))
2126 kvm_run->ready_for_interrupt_injection = 1;
2128 kvm_run->ready_for_interrupt_injection =
2129 (vcpu->interrupt_window_open &&
2130 vcpu->irq_summary == 0);
2133 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2137 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
2138 pr_debug("vcpu %d received sipi with vector # %x\n",
2139 vcpu->vcpu_id, vcpu->sipi_vector);
2140 kvm_lapic_reset(vcpu);
2141 r = kvm_x86_ops->vcpu_reset(vcpu);
2144 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
2148 if (vcpu->guest_debug.enabled)
2149 kvm_x86_ops->guest_debug_pre(vcpu);
2152 r = kvm_mmu_reload(vcpu);
2156 kvm_inject_pending_timer_irqs(vcpu);
2160 kvm_x86_ops->prepare_guest_switch(vcpu);
2161 kvm_load_guest_fpu(vcpu);
2163 local_irq_disable();
2165 if (signal_pending(current)) {
2169 kvm_run->exit_reason = KVM_EXIT_INTR;
2170 ++vcpu->stat.signal_exits;
2174 if (irqchip_in_kernel(vcpu->kvm))
2175 kvm_x86_ops->inject_pending_irq(vcpu);
2176 else if (!vcpu->mmio_read_completed)
2177 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2179 vcpu->guest_mode = 1;
2183 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
2184 kvm_x86_ops->tlb_flush(vcpu);
2186 kvm_x86_ops->run(vcpu, kvm_run);
2188 vcpu->guest_mode = 0;
2194 * We must have an instruction between local_irq_enable() and
2195 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2196 * the interrupt shadow. The stat.exits increment will do nicely.
2197 * But we need to prevent reordering, hence this barrier():
2206 * Profile KVM exit RIPs:
2208 if (unlikely(prof_on == KVM_PROFILING)) {
2209 kvm_x86_ops->cache_regs(vcpu);
2210 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2213 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2216 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2218 kvm_run->exit_reason = KVM_EXIT_INTR;
2219 ++vcpu->stat.request_irq_exits;
2222 if (!need_resched()) {
2223 ++vcpu->stat.light_exits;
2234 post_kvm_run_save(vcpu, kvm_run);
2240 static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2247 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2248 kvm_vcpu_block(vcpu);
2253 if (vcpu->sigset_active)
2254 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2256 /* re-sync apic's tpr */
2257 if (!irqchip_in_kernel(vcpu->kvm))
2258 set_cr8(vcpu, kvm_run->cr8);
2260 if (vcpu->pio.cur_count) {
2261 r = complete_pio(vcpu);
2265 #if CONFIG_HAS_IOMEM
2266 if (vcpu->mmio_needed) {
2267 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2268 vcpu->mmio_read_completed = 1;
2269 vcpu->mmio_needed = 0;
2270 r = emulate_instruction(vcpu, kvm_run,
2271 vcpu->mmio_fault_cr2, 0, 1);
2272 if (r == EMULATE_DO_MMIO) {
2274 * Read-modify-write. Back to userspace.
2281 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2282 kvm_x86_ops->cache_regs(vcpu);
2283 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2284 kvm_x86_ops->decache_regs(vcpu);
2287 r = __vcpu_run(vcpu, kvm_run);
2290 if (vcpu->sigset_active)
2291 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2297 static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2298 struct kvm_regs *regs)
2302 kvm_x86_ops->cache_regs(vcpu);
2304 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2305 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2306 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2307 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2308 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2309 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2310 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2311 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
2312 #ifdef CONFIG_X86_64
2313 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2314 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2315 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2316 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2317 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2318 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2319 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2320 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2323 regs->rip = vcpu->rip;
2324 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2327 * Don't leak debug flags in case they were set for guest debugging
2329 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2330 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2337 static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2338 struct kvm_regs *regs)
2342 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2343 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2344 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2345 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2346 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2347 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2348 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2349 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
2350 #ifdef CONFIG_X86_64
2351 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2352 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2353 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2354 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2355 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2356 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2357 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2358 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2361 vcpu->rip = regs->rip;
2362 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2364 kvm_x86_ops->decache_regs(vcpu);
2371 static void get_segment(struct kvm_vcpu *vcpu,
2372 struct kvm_segment *var, int seg)
2374 return kvm_x86_ops->get_segment(vcpu, var, seg);
2377 static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2378 struct kvm_sregs *sregs)
2380 struct descriptor_table dt;
2385 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2386 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2387 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2388 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2389 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2390 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2392 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2393 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2395 kvm_x86_ops->get_idt(vcpu, &dt);
2396 sregs->idt.limit = dt.limit;
2397 sregs->idt.base = dt.base;
2398 kvm_x86_ops->get_gdt(vcpu, &dt);
2399 sregs->gdt.limit = dt.limit;
2400 sregs->gdt.base = dt.base;
2402 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2403 sregs->cr0 = vcpu->cr0;
2404 sregs->cr2 = vcpu->cr2;
2405 sregs->cr3 = vcpu->cr3;
2406 sregs->cr4 = vcpu->cr4;
2407 sregs->cr8 = get_cr8(vcpu);
2408 sregs->efer = vcpu->shadow_efer;
2409 sregs->apic_base = kvm_get_apic_base(vcpu);
2411 if (irqchip_in_kernel(vcpu->kvm)) {
2412 memset(sregs->interrupt_bitmap, 0,
2413 sizeof sregs->interrupt_bitmap);
2414 pending_vec = kvm_x86_ops->get_irq(vcpu);
2415 if (pending_vec >= 0)
2416 set_bit(pending_vec,
2417 (unsigned long *)sregs->interrupt_bitmap);
2419 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2420 sizeof sregs->interrupt_bitmap);
2427 static void set_segment(struct kvm_vcpu *vcpu,
2428 struct kvm_segment *var, int seg)
2430 return kvm_x86_ops->set_segment(vcpu, var, seg);
2433 static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2434 struct kvm_sregs *sregs)
2436 int mmu_reset_needed = 0;
2437 int i, pending_vec, max_bits;
2438 struct descriptor_table dt;
2442 dt.limit = sregs->idt.limit;
2443 dt.base = sregs->idt.base;
2444 kvm_x86_ops->set_idt(vcpu, &dt);
2445 dt.limit = sregs->gdt.limit;
2446 dt.base = sregs->gdt.base;
2447 kvm_x86_ops->set_gdt(vcpu, &dt);
2449 vcpu->cr2 = sregs->cr2;
2450 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2451 vcpu->cr3 = sregs->cr3;
2453 set_cr8(vcpu, sregs->cr8);
2455 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
2456 #ifdef CONFIG_X86_64
2457 kvm_x86_ops->set_efer(vcpu, sregs->efer);
2459 kvm_set_apic_base(vcpu, sregs->apic_base);
2461 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2463 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
2464 vcpu->cr0 = sregs->cr0;
2465 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
2467 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
2468 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
2469 if (!is_long_mode(vcpu) && is_pae(vcpu))
2470 load_pdptrs(vcpu, vcpu->cr3);
2472 if (mmu_reset_needed)
2473 kvm_mmu_reset_context(vcpu);
2475 if (!irqchip_in_kernel(vcpu->kvm)) {
2476 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2477 sizeof vcpu->irq_pending);
2478 vcpu->irq_summary = 0;
2479 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2480 if (vcpu->irq_pending[i])
2481 __set_bit(i, &vcpu->irq_summary);
2483 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2484 pending_vec = find_first_bit(
2485 (const unsigned long *)sregs->interrupt_bitmap,
2487 /* Only pending external irq is handled here */
2488 if (pending_vec < max_bits) {
2489 kvm_x86_ops->set_irq(vcpu, pending_vec);
2490 pr_debug("Set back pending irq %d\n",
2495 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2496 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2497 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2498 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2499 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2500 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2502 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2503 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2510 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2512 struct kvm_segment cs;
2514 get_segment(vcpu, &cs, VCPU_SREG_CS);
2518 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2521 * Translate a guest virtual address to a guest physical address.
2523 static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2524 struct kvm_translation *tr)
2526 unsigned long vaddr = tr->linear_address;
2530 mutex_lock(&vcpu->kvm->lock);
2531 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2532 tr->physical_address = gpa;
2533 tr->valid = gpa != UNMAPPED_GVA;
2536 mutex_unlock(&vcpu->kvm->lock);
2542 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2543 struct kvm_interrupt *irq)
2545 if (irq->irq < 0 || irq->irq >= 256)
2547 if (irqchip_in_kernel(vcpu->kvm))
2551 set_bit(irq->irq, vcpu->irq_pending);
2552 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2559 static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2560 struct kvm_debug_guest *dbg)
2566 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
2573 static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2574 unsigned long address,
2577 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2578 unsigned long pgoff;
2581 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
2583 page = virt_to_page(vcpu->run);
2584 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2585 page = virt_to_page(vcpu->pio_data);
2587 return NOPAGE_SIGBUS;
2590 *type = VM_FAULT_MINOR;
2595 static struct vm_operations_struct kvm_vcpu_vm_ops = {
2596 .nopage = kvm_vcpu_nopage,
2599 static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2601 vma->vm_ops = &kvm_vcpu_vm_ops;
2605 static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2607 struct kvm_vcpu *vcpu = filp->private_data;
2609 fput(vcpu->kvm->filp);
2613 static struct file_operations kvm_vcpu_fops = {
2614 .release = kvm_vcpu_release,
2615 .unlocked_ioctl = kvm_vcpu_ioctl,
2616 .compat_ioctl = kvm_vcpu_ioctl,
2617 .mmap = kvm_vcpu_mmap,
2621 * Allocates an inode for the vcpu.
2623 static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2626 struct inode *inode;
2629 r = anon_inode_getfd(&fd, &inode, &file,
2630 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2633 atomic_inc(&vcpu->kvm->filp->f_count);
2638 * Creates some virtual cpus. Good luck creating more than one.
2640 static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2643 struct kvm_vcpu *vcpu;
2648 vcpu = kvm_x86_ops->vcpu_create(kvm, n);
2650 return PTR_ERR(vcpu);
2652 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2654 /* We do fxsave: this must be aligned. */
2655 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2658 r = kvm_x86_ops->vcpu_reset(vcpu);
2660 r = kvm_mmu_setup(vcpu);
2665 mutex_lock(&kvm->lock);
2666 if (kvm->vcpus[n]) {
2668 mutex_unlock(&kvm->lock);
2671 kvm->vcpus[n] = vcpu;
2672 mutex_unlock(&kvm->lock);
2674 /* Now it's all set up, let userspace reach it */
2675 r = create_vcpu_fd(vcpu);
2681 mutex_lock(&kvm->lock);
2682 kvm->vcpus[n] = NULL;
2683 mutex_unlock(&kvm->lock);
2687 kvm_mmu_unload(vcpu);
2691 kvm_x86_ops->vcpu_free(vcpu);
2695 static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2698 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2699 vcpu->sigset_active = 1;
2700 vcpu->sigset = *sigset;
2702 vcpu->sigset_active = 0;
2707 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2708 * we have asm/x86/processor.h
2719 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2720 #ifdef CONFIG_X86_64
2721 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2723 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2727 static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2729 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2733 memcpy(fpu->fpr, fxsave->st_space, 128);
2734 fpu->fcw = fxsave->cwd;
2735 fpu->fsw = fxsave->swd;
2736 fpu->ftwx = fxsave->twd;
2737 fpu->last_opcode = fxsave->fop;
2738 fpu->last_ip = fxsave->rip;
2739 fpu->last_dp = fxsave->rdp;
2740 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2747 static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2749 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2753 memcpy(fxsave->st_space, fpu->fpr, 128);
2754 fxsave->cwd = fpu->fcw;
2755 fxsave->swd = fpu->fsw;
2756 fxsave->twd = fpu->ftwx;
2757 fxsave->fop = fpu->last_opcode;
2758 fxsave->rip = fpu->last_ip;
2759 fxsave->rdp = fpu->last_dp;
2760 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2767 static long kvm_vcpu_ioctl(struct file *filp,
2768 unsigned int ioctl, unsigned long arg)
2770 struct kvm_vcpu *vcpu = filp->private_data;
2771 void __user *argp = (void __user *)arg;
2779 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
2781 case KVM_GET_REGS: {
2782 struct kvm_regs kvm_regs;
2784 memset(&kvm_regs, 0, sizeof kvm_regs);
2785 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
2789 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
2794 case KVM_SET_REGS: {
2795 struct kvm_regs kvm_regs;
2798 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
2800 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
2806 case KVM_GET_SREGS: {
2807 struct kvm_sregs kvm_sregs;
2809 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2810 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
2814 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
2819 case KVM_SET_SREGS: {
2820 struct kvm_sregs kvm_sregs;
2823 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
2825 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
2831 case KVM_TRANSLATE: {
2832 struct kvm_translation tr;
2835 if (copy_from_user(&tr, argp, sizeof tr))
2837 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
2841 if (copy_to_user(argp, &tr, sizeof tr))
2846 case KVM_INTERRUPT: {
2847 struct kvm_interrupt irq;
2850 if (copy_from_user(&irq, argp, sizeof irq))
2852 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2858 case KVM_DEBUG_GUEST: {
2859 struct kvm_debug_guest dbg;
2862 if (copy_from_user(&dbg, argp, sizeof dbg))
2864 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
2870 case KVM_SET_SIGNAL_MASK: {
2871 struct kvm_signal_mask __user *sigmask_arg = argp;
2872 struct kvm_signal_mask kvm_sigmask;
2873 sigset_t sigset, *p;
2878 if (copy_from_user(&kvm_sigmask, argp,
2879 sizeof kvm_sigmask))
2882 if (kvm_sigmask.len != sizeof sigset)
2885 if (copy_from_user(&sigset, sigmask_arg->sigset,
2890 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2896 memset(&fpu, 0, sizeof fpu);
2897 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2901 if (copy_to_user(argp, &fpu, sizeof fpu))
2910 if (copy_from_user(&fpu, argp, sizeof fpu))
2912 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2919 r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
2925 static long kvm_vm_ioctl(struct file *filp,
2926 unsigned int ioctl, unsigned long arg)
2928 struct kvm *kvm = filp->private_data;
2929 void __user *argp = (void __user *)arg;
2933 case KVM_CREATE_VCPU:
2934 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2938 case KVM_SET_MEMORY_REGION: {
2939 struct kvm_memory_region kvm_mem;
2940 struct kvm_userspace_memory_region kvm_userspace_mem;
2943 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
2945 kvm_userspace_mem.slot = kvm_mem.slot;
2946 kvm_userspace_mem.flags = kvm_mem.flags;
2947 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
2948 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
2949 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
2954 case KVM_SET_USER_MEMORY_REGION: {
2955 struct kvm_userspace_memory_region kvm_userspace_mem;
2958 if (copy_from_user(&kvm_userspace_mem, argp,
2959 sizeof kvm_userspace_mem))
2962 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
2967 case KVM_SET_NR_MMU_PAGES:
2968 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
2972 case KVM_GET_NR_MMU_PAGES:
2973 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
2975 case KVM_GET_DIRTY_LOG: {
2976 struct kvm_dirty_log log;
2979 if (copy_from_user(&log, argp, sizeof log))
2981 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
2986 case KVM_SET_MEMORY_ALIAS: {
2987 struct kvm_memory_alias alias;
2990 if (copy_from_user(&alias, argp, sizeof alias))
2992 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
2997 case KVM_CREATE_IRQCHIP:
2999 kvm->vpic = kvm_create_pic(kvm);
3001 r = kvm_ioapic_init(kvm);
3010 case KVM_IRQ_LINE: {
3011 struct kvm_irq_level irq_event;
3014 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3016 if (irqchip_in_kernel(kvm)) {
3017 mutex_lock(&kvm->lock);
3018 if (irq_event.irq < 16)
3019 kvm_pic_set_irq(pic_irqchip(kvm),
3022 kvm_ioapic_set_irq(kvm->vioapic,
3025 mutex_unlock(&kvm->lock);
3030 case KVM_GET_IRQCHIP: {
3031 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3032 struct kvm_irqchip chip;
3035 if (copy_from_user(&chip, argp, sizeof chip))
3038 if (!irqchip_in_kernel(kvm))
3040 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
3044 if (copy_to_user(argp, &chip, sizeof chip))
3049 case KVM_SET_IRQCHIP: {
3050 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3051 struct kvm_irqchip chip;
3054 if (copy_from_user(&chip, argp, sizeof chip))
3057 if (!irqchip_in_kernel(kvm))
3059 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
3072 static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3073 unsigned long address,
3076 struct kvm *kvm = vma->vm_file->private_data;
3077 unsigned long pgoff;
3080 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
3081 page = gfn_to_page(kvm, pgoff);
3082 if (is_error_page(page)) {
3083 kvm_release_page(page);
3084 return NOPAGE_SIGBUS;
3087 *type = VM_FAULT_MINOR;
3092 static struct vm_operations_struct kvm_vm_vm_ops = {
3093 .nopage = kvm_vm_nopage,
3096 static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3098 vma->vm_ops = &kvm_vm_vm_ops;
3102 static struct file_operations kvm_vm_fops = {
3103 .release = kvm_vm_release,
3104 .unlocked_ioctl = kvm_vm_ioctl,
3105 .compat_ioctl = kvm_vm_ioctl,
3106 .mmap = kvm_vm_mmap,
3109 static int kvm_dev_ioctl_create_vm(void)
3112 struct inode *inode;
3116 kvm = kvm_create_vm();
3118 return PTR_ERR(kvm);
3119 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3121 kvm_destroy_vm(kvm);
3130 static long kvm_dev_ioctl(struct file *filp,
3131 unsigned int ioctl, unsigned long arg)
3133 void __user *argp = (void __user *)arg;
3137 case KVM_GET_API_VERSION:
3141 r = KVM_API_VERSION;
3147 r = kvm_dev_ioctl_create_vm();
3149 case KVM_CHECK_EXTENSION: {
3150 int ext = (long)argp;
3153 case KVM_CAP_IRQCHIP:
3155 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
3156 case KVM_CAP_USER_MEMORY:
3165 case KVM_GET_VCPU_MMAP_SIZE:
3172 return kvm_arch_dev_ioctl(filp, ioctl, arg);
3178 static struct file_operations kvm_chardev_ops = {
3179 .unlocked_ioctl = kvm_dev_ioctl,
3180 .compat_ioctl = kvm_dev_ioctl,
3183 static struct miscdevice kvm_dev = {
3190 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3193 static void decache_vcpus_on_cpu(int cpu)
3196 struct kvm_vcpu *vcpu;
3199 spin_lock(&kvm_lock);
3200 list_for_each_entry(vm, &vm_list, vm_list)
3201 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
3202 vcpu = vm->vcpus[i];
3206 * If the vcpu is locked, then it is running on some
3207 * other cpu and therefore it is not cached on the
3210 * If it's not locked, check the last cpu it executed
3213 if (mutex_trylock(&vcpu->mutex)) {
3214 if (vcpu->cpu == cpu) {
3215 kvm_x86_ops->vcpu_decache(vcpu);
3218 mutex_unlock(&vcpu->mutex);
3221 spin_unlock(&kvm_lock);
3224 static void hardware_enable(void *junk)
3226 int cpu = raw_smp_processor_id();
3228 if (cpu_isset(cpu, cpus_hardware_enabled))
3230 cpu_set(cpu, cpus_hardware_enabled);
3231 kvm_x86_ops->hardware_enable(NULL);
3234 static void hardware_disable(void *junk)
3236 int cpu = raw_smp_processor_id();
3238 if (!cpu_isset(cpu, cpus_hardware_enabled))
3240 cpu_clear(cpu, cpus_hardware_enabled);
3241 decache_vcpus_on_cpu(cpu);
3242 kvm_x86_ops->hardware_disable(NULL);
3245 static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3252 case CPU_DYING_FROZEN:
3253 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3255 hardware_disable(NULL);
3257 case CPU_UP_CANCELED:
3258 case CPU_UP_CANCELED_FROZEN:
3259 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3261 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
3264 case CPU_ONLINE_FROZEN:
3265 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3267 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
3273 static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
3276 if (val == SYS_RESTART) {
3278 * Some (well, at least mine) BIOSes hang on reboot if
3281 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3282 on_each_cpu(hardware_disable, NULL, 0, 1);
3287 static struct notifier_block kvm_reboot_notifier = {
3288 .notifier_call = kvm_reboot,
3292 void kvm_io_bus_init(struct kvm_io_bus *bus)
3294 memset(bus, 0, sizeof(*bus));
3297 void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3301 for (i = 0; i < bus->dev_count; i++) {
3302 struct kvm_io_device *pos = bus->devs[i];
3304 kvm_iodevice_destructor(pos);
3308 struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3312 for (i = 0; i < bus->dev_count; i++) {
3313 struct kvm_io_device *pos = bus->devs[i];
3315 if (pos->in_range(pos, addr))
3322 void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3324 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3326 bus->devs[bus->dev_count++] = dev;
3329 static struct notifier_block kvm_cpu_notifier = {
3330 .notifier_call = kvm_cpu_hotplug,
3331 .priority = 20, /* must be > scheduler priority */
3334 static u64 stat_get(void *_offset)
3336 unsigned offset = (long)_offset;
3339 struct kvm_vcpu *vcpu;
3342 spin_lock(&kvm_lock);
3343 list_for_each_entry(kvm, &vm_list, vm_list)
3344 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
3345 vcpu = kvm->vcpus[i];
3347 total += *(u32 *)((void *)vcpu + offset);
3349 spin_unlock(&kvm_lock);
3353 DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
3355 static __init void kvm_init_debug(void)
3357 struct kvm_stats_debugfs_item *p;
3359 debugfs_dir = debugfs_create_dir("kvm", NULL);
3360 for (p = debugfs_entries; p->name; ++p)
3361 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3362 (void *)(long)p->offset,
3366 static void kvm_exit_debug(void)
3368 struct kvm_stats_debugfs_item *p;
3370 for (p = debugfs_entries; p->name; ++p)
3371 debugfs_remove(p->dentry);
3372 debugfs_remove(debugfs_dir);
3375 static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3377 hardware_disable(NULL);
3381 static int kvm_resume(struct sys_device *dev)
3383 hardware_enable(NULL);
3387 static struct sysdev_class kvm_sysdev_class = {
3389 .suspend = kvm_suspend,
3390 .resume = kvm_resume,
3393 static struct sys_device kvm_sysdev = {
3395 .cls = &kvm_sysdev_class,
3398 struct page *bad_page;
3401 struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3403 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3406 static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3408 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3410 kvm_x86_ops->vcpu_load(vcpu, cpu);
3413 static void kvm_sched_out(struct preempt_notifier *pn,
3414 struct task_struct *next)
3416 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3418 kvm_x86_ops->vcpu_put(vcpu);
3421 int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
3422 struct module *module)
3428 printk(KERN_ERR "kvm: already loaded the other module\n");
3432 if (!ops->cpu_has_kvm_support()) {
3433 printk(KERN_ERR "kvm: no hardware support\n");
3436 if (ops->disabled_by_bios()) {
3437 printk(KERN_ERR "kvm: disabled by bios\n");
3443 r = kvm_x86_ops->hardware_setup();
3447 for_each_online_cpu(cpu) {
3448 smp_call_function_single(cpu,
3449 kvm_x86_ops->check_processor_compatibility,
3455 on_each_cpu(hardware_enable, NULL, 0, 1);
3456 r = register_cpu_notifier(&kvm_cpu_notifier);
3459 register_reboot_notifier(&kvm_reboot_notifier);
3461 r = sysdev_class_register(&kvm_sysdev_class);
3465 r = sysdev_register(&kvm_sysdev);
3469 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3470 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3471 __alignof__(struct kvm_vcpu), 0, 0);
3472 if (!kvm_vcpu_cache) {
3477 kvm_chardev_ops.owner = module;
3479 r = misc_register(&kvm_dev);
3481 printk(KERN_ERR "kvm: misc device register failed\n");
3485 kvm_preempt_ops.sched_in = kvm_sched_in;
3486 kvm_preempt_ops.sched_out = kvm_sched_out;
3488 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
3493 kmem_cache_destroy(kvm_vcpu_cache);
3495 sysdev_unregister(&kvm_sysdev);
3497 sysdev_class_unregister(&kvm_sysdev_class);
3499 unregister_reboot_notifier(&kvm_reboot_notifier);
3500 unregister_cpu_notifier(&kvm_cpu_notifier);
3502 on_each_cpu(hardware_disable, NULL, 0, 1);
3504 kvm_x86_ops->hardware_unsetup();
3509 EXPORT_SYMBOL_GPL(kvm_init_x86);
3511 void kvm_exit_x86(void)
3513 misc_deregister(&kvm_dev);
3514 kmem_cache_destroy(kvm_vcpu_cache);
3515 sysdev_unregister(&kvm_sysdev);
3516 sysdev_class_unregister(&kvm_sysdev_class);
3517 unregister_reboot_notifier(&kvm_reboot_notifier);
3518 unregister_cpu_notifier(&kvm_cpu_notifier);
3519 on_each_cpu(hardware_disable, NULL, 0, 1);
3520 kvm_x86_ops->hardware_unsetup();
3523 EXPORT_SYMBOL_GPL(kvm_exit_x86);
3525 static __init int kvm_init(void)
3529 r = kvm_mmu_module_init();
3537 bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
3539 if (bad_page == NULL) {
3548 kvm_mmu_module_exit();
3553 static __exit void kvm_exit(void)
3556 __free_page(bad_page);
3557 kvm_mmu_module_exit();
3560 module_init(kvm_init)
3561 module_exit(kvm_exit)