#include "kvm.h"
#include "x86.h"
-#include "x86_emulate.h"
-#include "segment_descriptor.h"
#include "irq.h"
#include <linux/kvm.h>
#include <linux/profile.h>
#include <linux/kvm_para.h>
#include <linux/pagemap.h>
+#include <linux/mman.h>
#include <asm/processor.h>
-#include <asm/msr.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/desc.h>
+#include <asm/pgtable.h>
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
-static DEFINE_SPINLOCK(kvm_lock);
-static LIST_HEAD(vm_list);
+DEFINE_SPINLOCK(kvm_lock);
+LIST_HEAD(vm_list);
static cpumask_t cpus_hardware_enabled;
-struct kvm_x86_ops *kvm_x86_ops;
struct kmem_cache *kvm_vcpu_cache;
EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
static __read_mostly struct preempt_ops kvm_preempt_ops;
-#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
-
-static struct kvm_stats_debugfs_item {
- const char *name;
- int offset;
- struct dentry *dentry;
-} debugfs_entries[] = {
- { "pf_fixed", STAT_OFFSET(pf_fixed) },
- { "pf_guest", STAT_OFFSET(pf_guest) },
- { "tlb_flush", STAT_OFFSET(tlb_flush) },
- { "invlpg", STAT_OFFSET(invlpg) },
- { "exits", STAT_OFFSET(exits) },
- { "io_exits", STAT_OFFSET(io_exits) },
- { "mmio_exits", STAT_OFFSET(mmio_exits) },
- { "signal_exits", STAT_OFFSET(signal_exits) },
- { "irq_window", STAT_OFFSET(irq_window_exits) },
- { "halt_exits", STAT_OFFSET(halt_exits) },
- { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
- { "request_irq", STAT_OFFSET(request_irq_exits) },
- { "irq_exits", STAT_OFFSET(irq_exits) },
- { "light_exits", STAT_OFFSET(light_exits) },
- { "efer_reload", STAT_OFFSET(efer_reload) },
- { NULL }
-};
-
static struct dentry *debugfs_dir;
-#define CR0_RESERVED_BITS \
- (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
- | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
- | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
-#define CR4_RESERVED_BITS \
- (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
- | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
- | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
- | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
-
-#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
-#define EFER_RESERVED_BITS 0xfffffffffffff2fe
-
-#ifdef CONFIG_X86_64
-/* LDT or TSS descriptor in the GDT. 16 bytes. */
-struct segment_descriptor_64 {
- struct segment_descriptor s;
- u32 base_higher;
- u32 pad_zero;
-};
-
-#endif
-
static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
unsigned long arg);
-unsigned long segment_base(u16 selector)
-{
- struct descriptor_table gdt;
- struct segment_descriptor *d;
- unsigned long table_base;
- unsigned long v;
-
- if (selector == 0)
- return 0;
-
- asm("sgdt %0" : "=m"(gdt));
- table_base = gdt.base;
-
- if (selector & 4) { /* from ldt */
- u16 ldt_selector;
-
- asm("sldt %0" : "=g"(ldt_selector));
- table_base = segment_base(ldt_selector);
- }
- d = (struct segment_descriptor *)(table_base + (selector & ~7));
- v = d->base_low | ((unsigned long)d->base_mid << 16) |
- ((unsigned long)d->base_high << 24);
-#ifdef CONFIG_X86_64
- if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
- v |= ((unsigned long) \
- ((struct segment_descriptor_64 *)d)->base_higher) << 32;
-#endif
- return v;
-}
-EXPORT_SYMBOL_GPL(segment_base);
-
static inline int valid_vcpu(int n)
{
return likely(n >= 0 && n < KVM_MAX_VCPUS);
}
-void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
- return;
-
- vcpu->guest_fpu_loaded = 1;
- fx_save(&vcpu->host_fx_image);
- fx_restore(&vcpu->guest_fx_image);
-}
-EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
-
-void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->guest_fpu_loaded)
- return;
-
- vcpu->guest_fpu_loaded = 0;
- fx_save(&vcpu->guest_fx_image);
- fx_restore(&vcpu->host_fx_image);
-}
-EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
-
/*
* Switches to specified vcpu, until a matching vcpu_put()
*/
if (cpu != -1 && cpu != raw_smp_processor_id())
cpu_set(cpu, cpus);
}
+ if (cpus_empty(cpus))
+ return;
+ ++kvm->stat.remote_tlb_flush;
smp_call_function_mask(cpus, ack_flush, NULL, 1);
}
mutex_init(&vcpu->mutex);
vcpu->cpu = -1;
- vcpu->mmu.root_hpa = INVALID_PAGE;
vcpu->kvm = kvm;
vcpu->vcpu_id = id;
- if (!irqchip_in_kernel(kvm) || id == 0)
- vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
- else
- vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
init_waitqueue_head(&vcpu->wq);
page = alloc_page(GFP_KERNEL | __GFP_ZERO);
}
vcpu->run = page_address(page);
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!page) {
- r = -ENOMEM;
- goto fail_free_run;
- }
- vcpu->pio_data = page_address(page);
-
- r = kvm_mmu_create(vcpu);
+ r = kvm_arch_vcpu_init(vcpu);
if (r < 0)
- goto fail_free_pio_data;
-
- if (irqchip_in_kernel(kvm)) {
- r = kvm_create_lapic(vcpu);
- if (r < 0)
- goto fail_mmu_destroy;
- }
-
+ goto fail_free_run;
return 0;
-fail_mmu_destroy:
- kvm_mmu_destroy(vcpu);
-fail_free_pio_data:
- free_page((unsigned long)vcpu->pio_data);
fail_free_run:
free_page((unsigned long)vcpu->run);
fail:
void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
{
- kvm_free_lapic(vcpu);
- kvm_mmu_destroy(vcpu);
- free_page((unsigned long)vcpu->pio_data);
+ kvm_arch_vcpu_uninit(vcpu);
free_page((unsigned long)vcpu->run);
}
EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
static struct kvm *kvm_create_vm(void)
{
- struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
+ struct kvm *kvm = kvm_arch_create_vm();
- if (!kvm)
- return ERR_PTR(-ENOMEM);
+ if (IS_ERR(kvm))
+ goto out;
+ kvm->mm = current->mm;
+ atomic_inc(&kvm->mm->mm_count);
kvm_io_bus_init(&kvm->pio_bus);
mutex_init(&kvm->lock);
- INIT_LIST_HEAD(&kvm->active_mmu_pages);
kvm_io_bus_init(&kvm->mmio_bus);
spin_lock(&kvm_lock);
list_add(&kvm->vm_list, &vm_list);
spin_unlock(&kvm_lock);
+out:
return kvm;
}
-static void kvm_free_userspace_physmem(struct kvm_memory_slot *free)
-{
- int i;
-
- for (i = 0; i < free->npages; ++i) {
- if (free->phys_mem[i]) {
- if (!PageReserved(free->phys_mem[i]))
- SetPageDirty(free->phys_mem[i]);
- page_cache_release(free->phys_mem[i]);
- }
- }
-}
-
-static void kvm_free_kernel_physmem(struct kvm_memory_slot *free)
-{
- int i;
-
- for (i = 0; i < free->npages; ++i)
- if (free->phys_mem[i])
- __free_page(free->phys_mem[i]);
-}
-
/*
* Free any memory in @free but not in @dont.
*/
static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
- if (!dont || free->phys_mem != dont->phys_mem)
- if (free->phys_mem) {
- if (free->user_alloc)
- kvm_free_userspace_physmem(free);
- else
- kvm_free_kernel_physmem(free);
- vfree(free->phys_mem);
- }
if (!dont || free->rmap != dont->rmap)
vfree(free->rmap);
if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
vfree(free->dirty_bitmap);
- free->phys_mem = NULL;
free->npages = 0;
free->dirty_bitmap = NULL;
+ free->rmap = NULL;
}
-static void kvm_free_physmem(struct kvm *kvm)
+void kvm_free_physmem(struct kvm *kvm)
{
int i;
kvm_free_physmem_slot(&kvm->memslots[i], NULL);
}
-static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
- if (vcpu->pio.guest_pages[i]) {
- __free_page(vcpu->pio.guest_pages[i]);
- vcpu->pio.guest_pages[i] = NULL;
- }
-}
-
-static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
-{
- vcpu_load(vcpu);
- kvm_mmu_unload(vcpu);
- vcpu_put(vcpu);
-}
-
-static void kvm_free_vcpus(struct kvm *kvm)
-{
- unsigned int i;
-
- /*
- * Unpin any mmu pages first.
- */
- for (i = 0; i < KVM_MAX_VCPUS; ++i)
- if (kvm->vcpus[i])
- kvm_unload_vcpu_mmu(kvm->vcpus[i]);
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- if (kvm->vcpus[i]) {
- kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
- kvm->vcpus[i] = NULL;
- }
- }
-
-}
-
static void kvm_destroy_vm(struct kvm *kvm)
{
+ struct mm_struct *mm = kvm->mm;
+
spin_lock(&kvm_lock);
list_del(&kvm->vm_list);
spin_unlock(&kvm_lock);
kvm_io_bus_destroy(&kvm->pio_bus);
kvm_io_bus_destroy(&kvm->mmio_bus);
- kfree(kvm->vpic);
- kfree(kvm->vioapic);
- kvm_free_vcpus(kvm);
- kvm_free_physmem(kvm);
- kfree(kvm);
+ kvm_arch_destroy_vm(kvm);
+ mmdrop(mm);
}
static int kvm_vm_release(struct inode *inode, struct file *filp)
return 0;
}
-static void inject_gp(struct kvm_vcpu *vcpu)
-{
- kvm_x86_ops->inject_gp(vcpu, 0);
-}
-
-/*
- * Load the pae pdptrs. Return true is they are all valid.
- */
-static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
-{
- gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
- unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
- int i;
- int ret;
- u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
-
- mutex_lock(&vcpu->kvm->lock);
- ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
- offset * sizeof(u64), sizeof(pdpte));
- if (ret < 0) {
- ret = 0;
- goto out;
- }
- for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
- if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
- ret = 0;
- goto out;
- }
- }
- ret = 1;
-
- memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
-out:
- mutex_unlock(&vcpu->kvm->lock);
-
- return ret;
-}
-
-void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
-{
- if (cr0 & CR0_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
- cr0, vcpu->cr0);
- inject_gp(vcpu);
- return;
- }
-
- if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
- printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
- inject_gp(vcpu);
- return;
- }
-
- if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
- printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
- "and a clear PE flag\n");
- inject_gp(vcpu);
- return;
- }
-
- if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
-#ifdef CONFIG_X86_64
- if ((vcpu->shadow_efer & EFER_LME)) {
- int cs_db, cs_l;
-
- if (!is_pae(vcpu)) {
- printk(KERN_DEBUG "set_cr0: #GP, start paging "
- "in long mode while PAE is disabled\n");
- inject_gp(vcpu);
- return;
- }
- kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
- if (cs_l) {
- printk(KERN_DEBUG "set_cr0: #GP, start paging "
- "in long mode while CS.L == 1\n");
- inject_gp(vcpu);
- return;
-
- }
- } else
-#endif
- if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
- printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
- "reserved bits\n");
- inject_gp(vcpu);
- return;
- }
-
- }
-
- kvm_x86_ops->set_cr0(vcpu, cr0);
- vcpu->cr0 = cr0;
-
- mutex_lock(&vcpu->kvm->lock);
- kvm_mmu_reset_context(vcpu);
- mutex_unlock(&vcpu->kvm->lock);
- return;
-}
-EXPORT_SYMBOL_GPL(set_cr0);
-
-void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
-{
- set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
-}
-EXPORT_SYMBOL_GPL(lmsw);
-
-void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
-{
- if (cr4 & CR4_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
-
- if (is_long_mode(vcpu)) {
- if (!(cr4 & X86_CR4_PAE)) {
- printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
- "in long mode\n");
- inject_gp(vcpu);
- return;
- }
- } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
- && !load_pdptrs(vcpu, vcpu->cr3)) {
- printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
- inject_gp(vcpu);
- return;
- }
-
- if (cr4 & X86_CR4_VMXE) {
- printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
- inject_gp(vcpu);
- return;
- }
- kvm_x86_ops->set_cr4(vcpu, cr4);
- vcpu->cr4 = cr4;
- mutex_lock(&vcpu->kvm->lock);
- kvm_mmu_reset_context(vcpu);
- mutex_unlock(&vcpu->kvm->lock);
-}
-EXPORT_SYMBOL_GPL(set_cr4);
-
-void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
-{
- if (is_long_mode(vcpu)) {
- if (cr3 & CR3_L_MODE_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- } else {
- if (is_pae(vcpu)) {
- if (cr3 & CR3_PAE_RESERVED_BITS) {
- printk(KERN_DEBUG
- "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
- printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
- "reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- }
- /*
- * We don't check reserved bits in nonpae mode, because
- * this isn't enforced, and VMware depends on this.
- */
- }
-
- mutex_lock(&vcpu->kvm->lock);
- /*
- * Does the new cr3 value map to physical memory? (Note, we
- * catch an invalid cr3 even in real-mode, because it would
- * cause trouble later on when we turn on paging anyway.)
- *
- * A real CPU would silently accept an invalid cr3 and would
- * attempt to use it - with largely undefined (and often hard
- * to debug) behavior on the guest side.
- */
- if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
- inject_gp(vcpu);
- else {
- vcpu->cr3 = cr3;
- vcpu->mmu.new_cr3(vcpu);
- }
- mutex_unlock(&vcpu->kvm->lock);
-}
-EXPORT_SYMBOL_GPL(set_cr3);
-
-void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
-{
- if (cr8 & CR8_RESERVED_BITS) {
- printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
- inject_gp(vcpu);
- return;
- }
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_lapic_set_tpr(vcpu, cr8);
- else
- vcpu->cr8 = cr8;
-}
-EXPORT_SYMBOL_GPL(set_cr8);
-
-unsigned long get_cr8(struct kvm_vcpu *vcpu)
-{
- if (irqchip_in_kernel(vcpu->kvm))
- return kvm_lapic_get_cr8(vcpu);
- else
- return vcpu->cr8;
-}
-EXPORT_SYMBOL_GPL(get_cr8);
-
-u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
-{
- if (irqchip_in_kernel(vcpu->kvm))
- return vcpu->apic_base;
- else
- return vcpu->apic_base;
-}
-EXPORT_SYMBOL_GPL(kvm_get_apic_base);
-
-void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
-{
- /* TODO: reserve bits check */
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_lapic_set_base(vcpu, data);
- else
- vcpu->apic_base = data;
-}
-EXPORT_SYMBOL_GPL(kvm_set_apic_base);
-
-void fx_init(struct kvm_vcpu *vcpu)
-{
- unsigned after_mxcsr_mask;
-
- /* Initialize guest FPU by resetting ours and saving into guest's */
- preempt_disable();
- fx_save(&vcpu->host_fx_image);
- fpu_init();
- fx_save(&vcpu->guest_fx_image);
- fx_restore(&vcpu->host_fx_image);
- preempt_enable();
-
- vcpu->cr0 |= X86_CR0_ET;
- after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
- vcpu->guest_fx_image.mxcsr = 0x1f80;
- memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
- 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
-}
-EXPORT_SYMBOL_GPL(fx_init);
-
/*
* Allocate some memory and give it an address in the guest physical address
* space.
*
* Discontiguous memory is allowed, mostly for framebuffers.
+ *
+ * Must be called holding kvm->lock.
*/
-static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
- struct
- kvm_userspace_memory_region *mem,
- int user_alloc)
+int __kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
{
int r;
gfn_t base_gfn;
goto out;
if (mem->guest_phys_addr & (PAGE_SIZE - 1))
goto out;
- if (mem->slot >= KVM_MEMORY_SLOTS)
+ if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
goto out;
if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
goto out;
if (!npages)
mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
- mutex_lock(&kvm->lock);
-
new = old = *memslot;
new.base_gfn = base_gfn;
/* Disallow changing a memory slot's size. */
r = -EINVAL;
if (npages && old.npages && npages != old.npages)
- goto out_unlock;
+ goto out_free;
/* Check for overlaps */
r = -EEXIST;
continue;
if (!((base_gfn + npages <= s->base_gfn) ||
(base_gfn >= s->base_gfn + s->npages)))
- goto out_unlock;
+ goto out_free;
}
- /* Deallocate if slot is being removed */
- if (!npages)
- new.phys_mem = NULL;
-
/* Free page dirty bitmap if unneeded */
if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
new.dirty_bitmap = NULL;
r = -ENOMEM;
/* Allocate if a slot is being created */
- if (npages && !new.phys_mem) {
- new.phys_mem = vmalloc(npages * sizeof(struct page *));
-
- if (!new.phys_mem)
- goto out_unlock;
-
+ if (npages && !new.rmap) {
new.rmap = vmalloc(npages * sizeof(struct page *));
if (!new.rmap)
- goto out_unlock;
+ goto out_free;
- memset(new.phys_mem, 0, npages * sizeof(struct page *));
memset(new.rmap, 0, npages * sizeof(*new.rmap));
- if (user_alloc) {
- unsigned long pages_num;
-
- new.user_alloc = 1;
- down_read(¤t->mm->mmap_sem);
-
- pages_num = get_user_pages(current, current->mm,
- mem->userspace_addr,
- npages, 1, 1, new.phys_mem,
- NULL);
-
- up_read(¤t->mm->mmap_sem);
- if (pages_num != npages)
- goto out_unlock;
- } else {
- for (i = 0; i < npages; ++i) {
- new.phys_mem[i] = alloc_page(GFP_HIGHUSER
- | __GFP_ZERO);
- if (!new.phys_mem[i])
- goto out_unlock;
- }
- }
+
+ new.user_alloc = user_alloc;
+ new.userspace_addr = mem->userspace_addr;
}
/* Allocate page dirty bitmap if needed */
new.dirty_bitmap = vmalloc(dirty_bytes);
if (!new.dirty_bitmap)
- goto out_unlock;
+ goto out_free;
memset(new.dirty_bitmap, 0, dirty_bytes);
}
if (mem->slot >= kvm->nmemslots)
kvm->nmemslots = mem->slot + 1;
- if (!kvm->n_requested_mmu_pages) {
- unsigned int n_pages;
-
- if (npages) {
- n_pages = npages * KVM_PERMILLE_MMU_PAGES / 1000;
- kvm_mmu_change_mmu_pages(kvm, kvm->n_alloc_mmu_pages +
- n_pages);
- } else {
- unsigned int nr_mmu_pages;
-
- n_pages = old.npages * KVM_PERMILLE_MMU_PAGES / 1000;
- nr_mmu_pages = kvm->n_alloc_mmu_pages - n_pages;
- nr_mmu_pages = max(nr_mmu_pages,
- (unsigned int) KVM_MIN_ALLOC_MMU_PAGES);
- kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
- }
- }
-
*memslot = new;
- kvm_mmu_slot_remove_write_access(kvm, mem->slot);
- kvm_flush_remote_tlbs(kvm);
-
- mutex_unlock(&kvm->lock);
+ r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);
+ if (r) {
+ *memslot = old;
+ goto out_free;
+ }
kvm_free_physmem_slot(&old, &new);
return 0;
-out_unlock:
- mutex_unlock(&kvm->lock);
+out_free:
kvm_free_physmem_slot(&new, &old);
out:
return r;
+
}
+EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
-static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
- u32 kvm_nr_mmu_pages)
+int kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
{
- if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
- return -EINVAL;
+ int r;
mutex_lock(&kvm->lock);
-
- kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
- kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
-
+ r = __kvm_set_memory_region(kvm, mem, user_alloc);
mutex_unlock(&kvm->lock);
- return 0;
+ return r;
}
+EXPORT_SYMBOL_GPL(kvm_set_memory_region);
-static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
+int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
+ struct
+ kvm_userspace_memory_region *mem,
+ int user_alloc)
{
- return kvm->n_alloc_mmu_pages;
+ if (mem->slot >= KVM_MEMORY_SLOTS)
+ return -EINVAL;
+ return kvm_set_memory_region(kvm, mem, user_alloc);
}
-/*
- * Get (and clear) the dirty memory log for a memory slot.
- */
-static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
- struct kvm_dirty_log *log)
+int kvm_get_dirty_log(struct kvm *kvm,
+ struct kvm_dirty_log *log, int *is_dirty)
{
struct kvm_memory_slot *memslot;
int r, i;
int n;
unsigned long any = 0;
- mutex_lock(&kvm->lock);
-
r = -EINVAL;
if (log->slot >= KVM_MEMORY_SLOTS)
goto out;
if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
goto out;
- /* If nothing is dirty, don't bother messing with page tables. */
- if (any) {
- kvm_mmu_slot_remove_write_access(kvm, log->slot);
- kvm_flush_remote_tlbs(kvm);
- memset(memslot->dirty_bitmap, 0, n);
- }
+ if (any)
+ *is_dirty = 1;
r = 0;
-
out:
- mutex_unlock(&kvm->lock);
return r;
}
-/*
- * Set a new alias region. Aliases map a portion of physical memory into
- * another portion. This is useful for memory windows, for example the PC
- * VGA region.
- */
-static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
- struct kvm_memory_alias *alias)
+int is_error_page(struct page *page)
{
- int r, n;
- struct kvm_mem_alias *p;
-
- r = -EINVAL;
- /* General sanity checks */
- if (alias->memory_size & (PAGE_SIZE - 1))
- goto out;
- if (alias->guest_phys_addr & (PAGE_SIZE - 1))
- goto out;
- if (alias->slot >= KVM_ALIAS_SLOTS)
- goto out;
- if (alias->guest_phys_addr + alias->memory_size
- < alias->guest_phys_addr)
- goto out;
- if (alias->target_phys_addr + alias->memory_size
- < alias->target_phys_addr)
- goto out;
-
- mutex_lock(&kvm->lock);
-
- p = &kvm->aliases[alias->slot];
- p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
- p->npages = alias->memory_size >> PAGE_SHIFT;
- p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
+ return page == bad_page;
+}
+EXPORT_SYMBOL_GPL(is_error_page);
- for (n = KVM_ALIAS_SLOTS; n > 0; --n)
- if (kvm->aliases[n - 1].npages)
- break;
- kvm->naliases = n;
+static inline unsigned long bad_hva(void)
+{
+ return PAGE_OFFSET;
+}
- kvm_mmu_zap_all(kvm);
+int kvm_is_error_hva(unsigned long addr)
+{
+ return addr == bad_hva();
+}
+EXPORT_SYMBOL_GPL(kvm_is_error_hva);
- mutex_unlock(&kvm->lock);
+static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+{
+ int i;
- return 0;
+ for (i = 0; i < kvm->nmemslots; ++i) {
+ struct kvm_memory_slot *memslot = &kvm->memslots[i];
-out:
- return r;
+ if (gfn >= memslot->base_gfn
+ && gfn < memslot->base_gfn + memslot->npages)
+ return memslot;
+ }
+ return NULL;
}
-static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
+struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
{
- int r;
-
- r = 0;
- switch (chip->chip_id) {
- case KVM_IRQCHIP_PIC_MASTER:
- memcpy(&chip->chip.pic,
- &pic_irqchip(kvm)->pics[0],
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_PIC_SLAVE:
- memcpy(&chip->chip.pic,
- &pic_irqchip(kvm)->pics[1],
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_IOAPIC:
- memcpy(&chip->chip.ioapic,
- ioapic_irqchip(kvm),
- sizeof(struct kvm_ioapic_state));
- break;
- default:
- r = -EINVAL;
- break;
- }
- return r;
+ gfn = unalias_gfn(kvm, gfn);
+ return __gfn_to_memslot(kvm, gfn);
}
-static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
+int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
{
- int r;
+ int i;
- r = 0;
- switch (chip->chip_id) {
- case KVM_IRQCHIP_PIC_MASTER:
- memcpy(&pic_irqchip(kvm)->pics[0],
- &chip->chip.pic,
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_PIC_SLAVE:
- memcpy(&pic_irqchip(kvm)->pics[1],
- &chip->chip.pic,
- sizeof(struct kvm_pic_state));
- break;
- case KVM_IRQCHIP_IOAPIC:
- memcpy(ioapic_irqchip(kvm),
- &chip->chip.ioapic,
- sizeof(struct kvm_ioapic_state));
- break;
- default:
- r = -EINVAL;
- break;
+ gfn = unalias_gfn(kvm, gfn);
+ for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
+ struct kvm_memory_slot *memslot = &kvm->memslots[i];
+
+ if (gfn >= memslot->base_gfn
+ && gfn < memslot->base_gfn + memslot->npages)
+ return 1;
}
- kvm_pic_update_irq(pic_irqchip(kvm));
- return r;
+ return 0;
}
+EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
-int is_error_page(struct page *page)
+static unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
{
- return page == bad_page;
+ struct kvm_memory_slot *slot;
+
+ gfn = unalias_gfn(kvm, gfn);
+ slot = __gfn_to_memslot(kvm, gfn);
+ if (!slot)
+ return bad_hva();
+ return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
}
-EXPORT_SYMBOL_GPL(is_error_page);
-gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
+/*
+ * Requires current->mm->mmap_sem to be held
+ */
+static struct page *__gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
- int i;
- struct kvm_mem_alias *alias;
+ struct page *page[1];
+ unsigned long addr;
+ int npages;
- for (i = 0; i < kvm->naliases; ++i) {
- alias = &kvm->aliases[i];
- if (gfn >= alias->base_gfn
- && gfn < alias->base_gfn + alias->npages)
- return alias->target_gfn + gfn - alias->base_gfn;
+ might_sleep();
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr)) {
+ get_page(bad_page);
+ return bad_page;
+ }
+
+ npages = get_user_pages(current, current->mm, addr, 1, 1, 1, page,
+ NULL);
+
+ if (npages != 1) {
+ get_page(bad_page);
+ return bad_page;
}
- return gfn;
+
+ return page[0];
}
-static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
- int i;
+ struct page *page;
- for (i = 0; i < kvm->nmemslots; ++i) {
- struct kvm_memory_slot *memslot = &kvm->memslots[i];
+ down_read(¤t->mm->mmap_sem);
+ page = __gfn_to_page(kvm, gfn);
+ up_read(¤t->mm->mmap_sem);
- if (gfn >= memslot->base_gfn
- && gfn < memslot->base_gfn + memslot->npages)
- return memslot;
- }
- return NULL;
+ return page;
}
-struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+EXPORT_SYMBOL_GPL(gfn_to_page);
+
+void kvm_release_page_clean(struct page *page)
{
- gfn = unalias_gfn(kvm, gfn);
- return __gfn_to_memslot(kvm, gfn);
+ put_page(page);
}
+EXPORT_SYMBOL_GPL(kvm_release_page_clean);
-struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
+void kvm_release_page_dirty(struct page *page)
{
- struct kvm_memory_slot *slot;
-
- gfn = unalias_gfn(kvm, gfn);
- slot = __gfn_to_memslot(kvm, gfn);
- if (!slot)
- return bad_page;
- return slot->phys_mem[gfn - slot->base_gfn];
+ if (!PageReserved(page))
+ SetPageDirty(page);
+ put_page(page);
}
-EXPORT_SYMBOL_GPL(gfn_to_page);
+EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
static int next_segment(unsigned long len, int offset)
{
int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
int len)
{
- void *page_virt;
- struct page *page;
+ int r;
+ unsigned long addr;
- page = gfn_to_page(kvm, gfn);
- if (is_error_page(page))
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ r = copy_from_user(data, (void __user *)addr + offset, len);
+ if (r)
return -EFAULT;
- page_virt = kmap_atomic(page, KM_USER0);
-
- memcpy(data, page_virt + offset, len);
-
- kunmap_atomic(page_virt, KM_USER0);
return 0;
}
EXPORT_SYMBOL_GPL(kvm_read_guest_page);
int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
int offset, int len)
{
- void *page_virt;
- struct page *page;
+ int r;
+ unsigned long addr;
- page = gfn_to_page(kvm, gfn);
- if (is_error_page(page))
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
return -EFAULT;
- page_virt = kmap_atomic(page, KM_USER0);
-
- memcpy(page_virt + offset, data, len);
-
- kunmap_atomic(page_virt, KM_USER0);
- mark_page_dirty(kvm, gfn);
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_write_guest_page);
-
-int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
- unsigned long len)
-{
- gfn_t gfn = gpa >> PAGE_SHIFT;
- int seg;
- int offset = offset_in_page(gpa);
- int ret;
-
- while ((seg = next_segment(len, offset)) != 0) {
- ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
- if (ret < 0)
- return ret;
- offset = 0;
- len -= seg;
- data += seg;
- ++gfn;
- }
- return 0;
-}
-
-int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
-{
- void *page_virt;
- struct page *page;
-
- page = gfn_to_page(kvm, gfn);
- if (is_error_page(page))
+ r = copy_to_user((void __user *)addr + offset, data, len);
+ if (r)
return -EFAULT;
- page_virt = kmap_atomic(page, KM_USER0);
-
- memset(page_virt + offset, 0, len);
-
- kunmap_atomic(page_virt, KM_USER0);
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
-
-int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
-{
- gfn_t gfn = gpa >> PAGE_SHIFT;
- int seg;
- int offset = offset_in_page(gpa);
- int ret;
-
- while ((seg = next_segment(len, offset)) != 0) {
- ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
- if (ret < 0)
- return ret;
- offset = 0;
- len -= seg;
- ++gfn;
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_clear_guest);
-
-/* WARNING: Does not work on aliased pages. */
-void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
-{
- struct kvm_memory_slot *memslot;
-
- memslot = __gfn_to_memslot(kvm, gfn);
- if (memslot && memslot->dirty_bitmap) {
- unsigned long rel_gfn = gfn - memslot->base_gfn;
-
- /* avoid RMW */
- if (!test_bit(rel_gfn, memslot->dirty_bitmap))
- set_bit(rel_gfn, memslot->dirty_bitmap);
- }
-}
-
-int emulator_read_std(unsigned long addr,
- void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- void *data = val;
-
- while (bytes) {
- gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
- unsigned offset = addr & (PAGE_SIZE-1);
- unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
- int ret;
-
- if (gpa == UNMAPPED_GVA)
- return X86EMUL_PROPAGATE_FAULT;
- ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
- if (ret < 0)
- return X86EMUL_UNHANDLEABLE;
-
- bytes -= tocopy;
- data += tocopy;
- addr += tocopy;
- }
-
- return X86EMUL_CONTINUE;
-}
-EXPORT_SYMBOL_GPL(emulator_read_std);
-
-static int emulator_write_std(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
- return X86EMUL_UNHANDLEABLE;
-}
-
-/*
- * Only apic need an MMIO device hook, so shortcut now..
- */
-static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
-{
- struct kvm_io_device *dev;
-
- if (vcpu->apic) {
- dev = &vcpu->apic->dev;
- if (dev->in_range(dev, addr))
- return dev;
- }
- return NULL;
-}
-
-static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
-{
- struct kvm_io_device *dev;
-
- dev = vcpu_find_pervcpu_dev(vcpu, addr);
- if (dev == NULL)
- dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
- return dev;
-}
-
-static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
-{
- return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
-}
-
-static int emulator_read_emulated(unsigned long addr,
- void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- struct kvm_io_device *mmio_dev;
- gpa_t gpa;
-
- if (vcpu->mmio_read_completed) {
- memcpy(val, vcpu->mmio_data, bytes);
- vcpu->mmio_read_completed = 0;
- return X86EMUL_CONTINUE;
- } else if (emulator_read_std(addr, val, bytes, vcpu)
- == X86EMUL_CONTINUE)
- return X86EMUL_CONTINUE;
-
- gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
- if (gpa == UNMAPPED_GVA)
- return X86EMUL_PROPAGATE_FAULT;
-
- /*
- * Is this MMIO handled locally?
- */
- mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
- if (mmio_dev) {
- kvm_iodevice_read(mmio_dev, gpa, bytes, val);
- return X86EMUL_CONTINUE;
- }
-
- vcpu->mmio_needed = 1;
- vcpu->mmio_phys_addr = gpa;
- vcpu->mmio_size = bytes;
- vcpu->mmio_is_write = 0;
-
- return X86EMUL_UNHANDLEABLE;
-}
-
-static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
- const void *val, int bytes)
-{
- int ret;
-
- ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
- if (ret < 0)
- return 0;
- kvm_mmu_pte_write(vcpu, gpa, val, bytes);
- return 1;
-}
-
-static int emulator_write_emulated_onepage(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- struct kvm_io_device *mmio_dev;
- gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
-
- if (gpa == UNMAPPED_GVA) {
- kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
- return X86EMUL_PROPAGATE_FAULT;
- }
-
- if (emulator_write_phys(vcpu, gpa, val, bytes))
- return X86EMUL_CONTINUE;
-
- /*
- * Is this MMIO handled locally?
- */
- mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
- if (mmio_dev) {
- kvm_iodevice_write(mmio_dev, gpa, bytes, val);
- return X86EMUL_CONTINUE;
- }
-
- vcpu->mmio_needed = 1;
- vcpu->mmio_phys_addr = gpa;
- vcpu->mmio_size = bytes;
- vcpu->mmio_is_write = 1;
- memcpy(vcpu->mmio_data, val, bytes);
-
- return X86EMUL_CONTINUE;
-}
-
-int emulator_write_emulated(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- /* Crossing a page boundary? */
- if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
- int rc, now;
-
- now = -addr & ~PAGE_MASK;
- rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
- if (rc != X86EMUL_CONTINUE)
- return rc;
- addr += now;
- val += now;
- bytes -= now;
- }
- return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
-}
-EXPORT_SYMBOL_GPL(emulator_write_emulated);
-
-static int emulator_cmpxchg_emulated(unsigned long addr,
- const void *old,
- const void *new,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
-{
- static int reported;
-
- if (!reported) {
- reported = 1;
- printk(KERN_WARNING "kvm: emulating exchange as write\n");
- }
- return emulator_write_emulated(addr, new, bytes, vcpu);
-}
-
-static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
-{
- return kvm_x86_ops->get_segment_base(vcpu, seg);
-}
-
-int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
-{
- return X86EMUL_CONTINUE;
-}
-
-int emulate_clts(struct kvm_vcpu *vcpu)
-{
- kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
- return X86EMUL_CONTINUE;
-}
-
-int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
-{
- struct kvm_vcpu *vcpu = ctxt->vcpu;
-
- switch (dr) {
- case 0 ... 3:
- *dest = kvm_x86_ops->get_dr(vcpu, dr);
- return X86EMUL_CONTINUE;
- default:
- pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
- return X86EMUL_UNHANDLEABLE;
- }
-}
-
-int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
-{
- unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
- int exception;
-
- kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
- if (exception) {
- /* FIXME: better handling */
- return X86EMUL_UNHANDLEABLE;
- }
- return X86EMUL_CONTINUE;
-}
-
-void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
-{
- static int reported;
- u8 opcodes[4];
- unsigned long rip = vcpu->rip;
- unsigned long rip_linear;
-
- rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
-
- if (reported)
- return;
-
- emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
-
- printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
- context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
- reported = 1;
-}
-EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
-
-struct x86_emulate_ops emulate_ops = {
- .read_std = emulator_read_std,
- .write_std = emulator_write_std,
- .read_emulated = emulator_read_emulated,
- .write_emulated = emulator_write_emulated,
- .cmpxchg_emulated = emulator_cmpxchg_emulated,
-};
-
-int emulate_instruction(struct kvm_vcpu *vcpu,
- struct kvm_run *run,
- unsigned long cr2,
- u16 error_code,
- int no_decode)
-{
- int r;
-
- vcpu->mmio_fault_cr2 = cr2;
- kvm_x86_ops->cache_regs(vcpu);
-
- vcpu->mmio_is_write = 0;
- vcpu->pio.string = 0;
-
- if (!no_decode) {
- int cs_db, cs_l;
- kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
-
- vcpu->emulate_ctxt.vcpu = vcpu;
- vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
- vcpu->emulate_ctxt.cr2 = cr2;
- vcpu->emulate_ctxt.mode =
- (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
- ? X86EMUL_MODE_REAL : cs_l
- ? X86EMUL_MODE_PROT64 : cs_db
- ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
-
- if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
- vcpu->emulate_ctxt.cs_base = 0;
- vcpu->emulate_ctxt.ds_base = 0;
- vcpu->emulate_ctxt.es_base = 0;
- vcpu->emulate_ctxt.ss_base = 0;
- } else {
- vcpu->emulate_ctxt.cs_base =
- get_segment_base(vcpu, VCPU_SREG_CS);
- vcpu->emulate_ctxt.ds_base =
- get_segment_base(vcpu, VCPU_SREG_DS);
- vcpu->emulate_ctxt.es_base =
- get_segment_base(vcpu, VCPU_SREG_ES);
- vcpu->emulate_ctxt.ss_base =
- get_segment_base(vcpu, VCPU_SREG_SS);
- }
-
- vcpu->emulate_ctxt.gs_base =
- get_segment_base(vcpu, VCPU_SREG_GS);
- vcpu->emulate_ctxt.fs_base =
- get_segment_base(vcpu, VCPU_SREG_FS);
-
- r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
- if (r) {
- if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
- return EMULATE_DONE;
- return EMULATE_FAIL;
- }
- }
-
- r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
-
- if (vcpu->pio.string)
- return EMULATE_DO_MMIO;
-
- if ((r || vcpu->mmio_is_write) && run) {
- run->exit_reason = KVM_EXIT_MMIO;
- run->mmio.phys_addr = vcpu->mmio_phys_addr;
- memcpy(run->mmio.data, vcpu->mmio_data, 8);
- run->mmio.len = vcpu->mmio_size;
- run->mmio.is_write = vcpu->mmio_is_write;
- }
-
- if (r) {
- if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
- return EMULATE_DONE;
- if (!vcpu->mmio_needed) {
- kvm_report_emulation_failure(vcpu, "mmio");
- return EMULATE_FAIL;
- }
- return EMULATE_DO_MMIO;
- }
-
- kvm_x86_ops->decache_regs(vcpu);
- kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
-
- if (vcpu->mmio_is_write) {
- vcpu->mmio_needed = 0;
- return EMULATE_DO_MMIO;
- }
-
- return EMULATE_DONE;
-}
-EXPORT_SYMBOL_GPL(emulate_instruction);
-
-/*
- * The vCPU has executed a HLT instruction with in-kernel mode enabled.
- */
-static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
-{
- DECLARE_WAITQUEUE(wait, current);
-
- add_wait_queue(&vcpu->wq, &wait);
-
- /*
- * We will block until either an interrupt or a signal wakes us up
- */
- while (!kvm_cpu_has_interrupt(vcpu)
- && !signal_pending(current)
- && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
- && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
- set_current_state(TASK_INTERRUPTIBLE);
- vcpu_put(vcpu);
- schedule();
- vcpu_load(vcpu);
- }
-
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&vcpu->wq, &wait);
-}
-
-int kvm_emulate_halt(struct kvm_vcpu *vcpu)
-{
- ++vcpu->stat.halt_exits;
- if (irqchip_in_kernel(vcpu->kvm)) {
- vcpu->mp_state = VCPU_MP_STATE_HALTED;
- kvm_vcpu_block(vcpu);
- if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
- return -EINTR;
- return 1;
- } else {
- vcpu->run->exit_reason = KVM_EXIT_HLT;
- return 0;
- }
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_halt);
-
-int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
-{
- unsigned long nr, a0, a1, a2, a3, ret;
-
- kvm_x86_ops->cache_regs(vcpu);
-
- nr = vcpu->regs[VCPU_REGS_RAX];
- a0 = vcpu->regs[VCPU_REGS_RBX];
- a1 = vcpu->regs[VCPU_REGS_RCX];
- a2 = vcpu->regs[VCPU_REGS_RDX];
- a3 = vcpu->regs[VCPU_REGS_RSI];
-
- if (!is_long_mode(vcpu)) {
- nr &= 0xFFFFFFFF;
- a0 &= 0xFFFFFFFF;
- a1 &= 0xFFFFFFFF;
- a2 &= 0xFFFFFFFF;
- a3 &= 0xFFFFFFFF;
- }
-
- switch (nr) {
- default:
- ret = -KVM_ENOSYS;
- break;
- }
- vcpu->regs[VCPU_REGS_RAX] = ret;
- kvm_x86_ops->decache_regs(vcpu);
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
-
-int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
-{
- char instruction[3];
- int ret = 0;
-
- mutex_lock(&vcpu->kvm->lock);
-
- /*
- * Blow out the MMU to ensure that no other VCPU has an active mapping
- * to ensure that the updated hypercall appears atomically across all
- * VCPUs.
- */
- kvm_mmu_zap_all(vcpu->kvm);
-
- kvm_x86_ops->cache_regs(vcpu);
- kvm_x86_ops->patch_hypercall(vcpu, instruction);
- if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
- != X86EMUL_CONTINUE)
- ret = -EFAULT;
-
- mutex_unlock(&vcpu->kvm->lock);
-
- return ret;
-}
-
-static u64 mk_cr_64(u64 curr_cr, u32 new_val)
-{
- return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
-}
-
-void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
-{
- struct descriptor_table dt = { limit, base };
-
- kvm_x86_ops->set_gdt(vcpu, &dt);
-}
-
-void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
-{
- struct descriptor_table dt = { limit, base };
-
- kvm_x86_ops->set_idt(vcpu, &dt);
-}
-
-void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
- unsigned long *rflags)
-{
- lmsw(vcpu, msw);
- *rflags = kvm_x86_ops->get_rflags(vcpu);
-}
-
-unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
-{
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
- switch (cr) {
- case 0:
- return vcpu->cr0;
- case 2:
- return vcpu->cr2;
- case 3:
- return vcpu->cr3;
- case 4:
- return vcpu->cr4;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
- return 0;
- }
-}
-
-void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
- unsigned long *rflags)
-{
- switch (cr) {
- case 0:
- set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
- *rflags = kvm_x86_ops->get_rflags(vcpu);
- break;
- case 2:
- vcpu->cr2 = val;
- break;
- case 3:
- set_cr3(vcpu, val);
- break;
- case 4:
- set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
- break;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
- }
-}
-
-int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
-{
- u64 data;
-
- switch (msr) {
- case 0xc0010010: /* SYSCFG */
- case 0xc0010015: /* HWCR */
- case MSR_IA32_PLATFORM_ID:
- case MSR_IA32_P5_MC_ADDR:
- case MSR_IA32_P5_MC_TYPE:
- case MSR_IA32_MC0_CTL:
- case MSR_IA32_MCG_STATUS:
- case MSR_IA32_MCG_CAP:
- case MSR_IA32_MC0_MISC:
- case MSR_IA32_MC0_MISC+4:
- case MSR_IA32_MC0_MISC+8:
- case MSR_IA32_MC0_MISC+12:
- case MSR_IA32_MC0_MISC+16:
- case MSR_IA32_UCODE_REV:
- case MSR_IA32_PERF_STATUS:
- case MSR_IA32_EBL_CR_POWERON:
- /* MTRR registers */
- case 0xfe:
- case 0x200 ... 0x2ff:
- data = 0;
- break;
- case 0xcd: /* fsb frequency */
- data = 3;
- break;
- case MSR_IA32_APICBASE:
- data = kvm_get_apic_base(vcpu);
- break;
- case MSR_IA32_MISC_ENABLE:
- data = vcpu->ia32_misc_enable_msr;
- break;
-#ifdef CONFIG_X86_64
- case MSR_EFER:
- data = vcpu->shadow_efer;
- break;
-#endif
- default:
- pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
- return 1;
- }
- *pdata = data;
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_get_msr_common);
-
-/*
- * Reads an msr value (of 'msr_index') into 'pdata'.
- * Returns 0 on success, non-0 otherwise.
- * Assumes vcpu_load() was already called.
- */
-int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
-{
- return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
-}
-
-#ifdef CONFIG_X86_64
-
-static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
-{
- if (efer & EFER_RESERVED_BITS) {
- printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
- efer);
- inject_gp(vcpu);
- return;
- }
-
- if (is_paging(vcpu)
- && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
- printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
- inject_gp(vcpu);
- return;
- }
-
- kvm_x86_ops->set_efer(vcpu, efer);
-
- efer &= ~EFER_LMA;
- efer |= vcpu->shadow_efer & EFER_LMA;
-
- vcpu->shadow_efer = efer;
-}
-
-#endif
-
-int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
-{
- switch (msr) {
-#ifdef CONFIG_X86_64
- case MSR_EFER:
- set_efer(vcpu, data);
- break;
-#endif
- case MSR_IA32_MC0_STATUS:
- pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
- __FUNCTION__, data);
- break;
- case MSR_IA32_MCG_STATUS:
- pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
- __FUNCTION__, data);
- break;
- case MSR_IA32_UCODE_REV:
- case MSR_IA32_UCODE_WRITE:
- case 0x200 ... 0x2ff: /* MTRRs */
- break;
- case MSR_IA32_APICBASE:
- kvm_set_apic_base(vcpu, data);
- break;
- case MSR_IA32_MISC_ENABLE:
- vcpu->ia32_misc_enable_msr = data;
- break;
- default:
- pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
- return 1;
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_set_msr_common);
-
-/*
- * Writes msr value into into the appropriate "register".
- * Returns 0 on success, non-0 otherwise.
- * Assumes vcpu_load() was already called.
- */
-int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
-{
- return kvm_x86_ops->set_msr(vcpu, msr_index, data);
-}
-
-void kvm_resched(struct kvm_vcpu *vcpu)
-{
- if (!need_resched())
- return;
- cond_resched();
-}
-EXPORT_SYMBOL_GPL(kvm_resched);
-
-void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
-{
- int i;
- u32 function;
- struct kvm_cpuid_entry *e, *best;
-
- kvm_x86_ops->cache_regs(vcpu);
- function = vcpu->regs[VCPU_REGS_RAX];
- vcpu->regs[VCPU_REGS_RAX] = 0;
- vcpu->regs[VCPU_REGS_RBX] = 0;
- vcpu->regs[VCPU_REGS_RCX] = 0;
- vcpu->regs[VCPU_REGS_RDX] = 0;
- best = NULL;
- for (i = 0; i < vcpu->cpuid_nent; ++i) {
- e = &vcpu->cpuid_entries[i];
- if (e->function == function) {
- best = e;
- break;
- }
- /*
- * Both basic or both extended?
- */
- if (((e->function ^ function) & 0x80000000) == 0)
- if (!best || e->function > best->function)
- best = e;
- }
- if (best) {
- vcpu->regs[VCPU_REGS_RAX] = best->eax;
- vcpu->regs[VCPU_REGS_RBX] = best->ebx;
- vcpu->regs[VCPU_REGS_RCX] = best->ecx;
- vcpu->regs[VCPU_REGS_RDX] = best->edx;
- }
- kvm_x86_ops->decache_regs(vcpu);
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
-
-static int pio_copy_data(struct kvm_vcpu *vcpu)
-{
- void *p = vcpu->pio_data;
- void *q;
- unsigned bytes;
- int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
-
- q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
- PAGE_KERNEL);
- if (!q) {
- free_pio_guest_pages(vcpu);
- return -ENOMEM;
- }
- q += vcpu->pio.guest_page_offset;
- bytes = vcpu->pio.size * vcpu->pio.cur_count;
- if (vcpu->pio.in)
- memcpy(q, p, bytes);
- else
- memcpy(p, q, bytes);
- q -= vcpu->pio.guest_page_offset;
- vunmap(q);
- free_pio_guest_pages(vcpu);
- return 0;
-}
-
-static int complete_pio(struct kvm_vcpu *vcpu)
-{
- struct kvm_pio_request *io = &vcpu->pio;
- long delta;
- int r;
-
- kvm_x86_ops->cache_regs(vcpu);
-
- if (!io->string) {
- if (io->in)
- memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
- io->size);
- } else {
- if (io->in) {
- r = pio_copy_data(vcpu);
- if (r) {
- kvm_x86_ops->cache_regs(vcpu);
- return r;
- }
- }
-
- delta = 1;
- if (io->rep) {
- delta *= io->cur_count;
- /*
- * The size of the register should really depend on
- * current address size.
- */
- vcpu->regs[VCPU_REGS_RCX] -= delta;
- }
- if (io->down)
- delta = -delta;
- delta *= io->size;
- if (io->in)
- vcpu->regs[VCPU_REGS_RDI] += delta;
- else
- vcpu->regs[VCPU_REGS_RSI] += delta;
- }
-
- kvm_x86_ops->decache_regs(vcpu);
-
- io->count -= io->cur_count;
- io->cur_count = 0;
-
- return 0;
-}
-
-static void kernel_pio(struct kvm_io_device *pio_dev,
- struct kvm_vcpu *vcpu,
- void *pd)
-{
- /* TODO: String I/O for in kernel device */
-
- mutex_lock(&vcpu->kvm->lock);
- if (vcpu->pio.in)
- kvm_iodevice_read(pio_dev, vcpu->pio.port,
- vcpu->pio.size,
- pd);
- else
- kvm_iodevice_write(pio_dev, vcpu->pio.port,
- vcpu->pio.size,
- pd);
- mutex_unlock(&vcpu->kvm->lock);
-}
-
-static void pio_string_write(struct kvm_io_device *pio_dev,
- struct kvm_vcpu *vcpu)
-{
- struct kvm_pio_request *io = &vcpu->pio;
- void *pd = vcpu->pio_data;
- int i;
-
- mutex_lock(&vcpu->kvm->lock);
- for (i = 0; i < io->cur_count; i++) {
- kvm_iodevice_write(pio_dev, io->port,
- io->size,
- pd);
- pd += io->size;
- }
- mutex_unlock(&vcpu->kvm->lock);
-}
-
-int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
- int size, unsigned port)
-{
- struct kvm_io_device *pio_dev;
-
- vcpu->run->exit_reason = KVM_EXIT_IO;
- vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
- vcpu->run->io.size = vcpu->pio.size = size;
- vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
- vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
- vcpu->run->io.port = vcpu->pio.port = port;
- vcpu->pio.in = in;
- vcpu->pio.string = 0;
- vcpu->pio.down = 0;
- vcpu->pio.guest_page_offset = 0;
- vcpu->pio.rep = 0;
-
- kvm_x86_ops->cache_regs(vcpu);
- memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
- kvm_x86_ops->decache_regs(vcpu);
-
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-
- pio_dev = vcpu_find_pio_dev(vcpu, port);
- if (pio_dev) {
- kernel_pio(pio_dev, vcpu, vcpu->pio_data);
- complete_pio(vcpu);
- return 1;
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio);
-
-int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
- int size, unsigned long count, int down,
- gva_t address, int rep, unsigned port)
-{
- unsigned now, in_page;
- int i, ret = 0;
- int nr_pages = 1;
- struct page *page;
- struct kvm_io_device *pio_dev;
-
- vcpu->run->exit_reason = KVM_EXIT_IO;
- vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
- vcpu->run->io.size = vcpu->pio.size = size;
- vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
- vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
- vcpu->run->io.port = vcpu->pio.port = port;
- vcpu->pio.in = in;
- vcpu->pio.string = 1;
- vcpu->pio.down = down;
- vcpu->pio.guest_page_offset = offset_in_page(address);
- vcpu->pio.rep = rep;
-
- if (!count) {
- kvm_x86_ops->skip_emulated_instruction(vcpu);
- return 1;
- }
-
- if (!down)
- in_page = PAGE_SIZE - offset_in_page(address);
- else
- in_page = offset_in_page(address) + size;
- now = min(count, (unsigned long)in_page / size);
- if (!now) {
- /*
- * String I/O straddles page boundary. Pin two guest pages
- * so that we satisfy atomicity constraints. Do just one
- * transaction to avoid complexity.
- */
- nr_pages = 2;
- now = 1;
- }
- if (down) {
- /*
- * String I/O in reverse. Yuck. Kill the guest, fix later.
- */
- pr_unimpl(vcpu, "guest string pio down\n");
- inject_gp(vcpu);
- return 1;
- }
- vcpu->run->io.count = now;
- vcpu->pio.cur_count = now;
-
- if (vcpu->pio.cur_count == vcpu->pio.count)
- kvm_x86_ops->skip_emulated_instruction(vcpu);
-
- for (i = 0; i < nr_pages; ++i) {
- mutex_lock(&vcpu->kvm->lock);
- page = gva_to_page(vcpu, address + i * PAGE_SIZE);
- if (page)
- get_page(page);
- vcpu->pio.guest_pages[i] = page;
- mutex_unlock(&vcpu->kvm->lock);
- if (!page) {
- inject_gp(vcpu);
- free_pio_guest_pages(vcpu);
- return 1;
- }
- }
-
- pio_dev = vcpu_find_pio_dev(vcpu, port);
- if (!vcpu->pio.in) {
- /* string PIO write */
- ret = pio_copy_data(vcpu);
- if (ret >= 0 && pio_dev) {
- pio_string_write(pio_dev, vcpu);
- complete_pio(vcpu);
- if (vcpu->pio.count == 0)
- ret = 1;
- }
- } else if (pio_dev)
- pr_unimpl(vcpu, "no string pio read support yet, "
- "port %x size %d count %ld\n",
- port, size, count);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
-
-/*
- * Check if userspace requested an interrupt window, and that the
- * interrupt window is open.
- *
- * No need to exit to userspace if we already have an interrupt queued.
- */
-static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- return (!vcpu->irq_summary &&
- kvm_run->request_interrupt_window &&
- vcpu->interrupt_window_open &&
- (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
-}
-
-static void post_kvm_run_save(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
- kvm_run->cr8 = get_cr8(vcpu);
- kvm_run->apic_base = kvm_get_apic_base(vcpu);
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_run->ready_for_interrupt_injection = 1;
- else
- kvm_run->ready_for_interrupt_injection =
- (vcpu->interrupt_window_open &&
- vcpu->irq_summary == 0);
-}
-
-static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- int r;
-
- if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
- pr_debug("vcpu %d received sipi with vector # %x\n",
- vcpu->vcpu_id, vcpu->sipi_vector);
- kvm_lapic_reset(vcpu);
- kvm_x86_ops->vcpu_reset(vcpu);
- vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
- }
-
-preempted:
- if (vcpu->guest_debug.enabled)
- kvm_x86_ops->guest_debug_pre(vcpu);
-
-again:
- r = kvm_mmu_reload(vcpu);
- if (unlikely(r))
- goto out;
-
- kvm_inject_pending_timer_irqs(vcpu);
-
- preempt_disable();
-
- kvm_x86_ops->prepare_guest_switch(vcpu);
- kvm_load_guest_fpu(vcpu);
-
- local_irq_disable();
-
- if (signal_pending(current)) {
- local_irq_enable();
- preempt_enable();
- r = -EINTR;
- kvm_run->exit_reason = KVM_EXIT_INTR;
- ++vcpu->stat.signal_exits;
- goto out;
- }
-
- if (irqchip_in_kernel(vcpu->kvm))
- kvm_x86_ops->inject_pending_irq(vcpu);
- else if (!vcpu->mmio_read_completed)
- kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
-
- vcpu->guest_mode = 1;
- kvm_guest_enter();
-
- if (vcpu->requests)
- if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
- kvm_x86_ops->tlb_flush(vcpu);
-
- kvm_x86_ops->run(vcpu, kvm_run);
-
- vcpu->guest_mode = 0;
- local_irq_enable();
-
- ++vcpu->stat.exits;
-
- /*
- * We must have an instruction between local_irq_enable() and
- * kvm_guest_exit(), so the timer interrupt isn't delayed by
- * the interrupt shadow. The stat.exits increment will do nicely.
- * But we need to prevent reordering, hence this barrier():
- */
- barrier();
-
- kvm_guest_exit();
-
- preempt_enable();
-
- /*
- * Profile KVM exit RIPs:
- */
- if (unlikely(prof_on == KVM_PROFILING)) {
- kvm_x86_ops->cache_regs(vcpu);
- profile_hit(KVM_PROFILING, (void *)vcpu->rip);
- }
-
- r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
-
- if (r > 0) {
- if (dm_request_for_irq_injection(vcpu, kvm_run)) {
- r = -EINTR;
- kvm_run->exit_reason = KVM_EXIT_INTR;
- ++vcpu->stat.request_irq_exits;
- goto out;
- }
- if (!need_resched()) {
- ++vcpu->stat.light_exits;
- goto again;
- }
- }
-
-out:
- if (r > 0) {
- kvm_resched(vcpu);
- goto preempted;
- }
-
- post_kvm_run_save(vcpu, kvm_run);
-
- return r;
-}
-
-
-static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- int r;
- sigset_t sigsaved;
-
- vcpu_load(vcpu);
-
- if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
- kvm_vcpu_block(vcpu);
- vcpu_put(vcpu);
- return -EAGAIN;
- }
-
- if (vcpu->sigset_active)
- sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
-
- /* re-sync apic's tpr */
- if (!irqchip_in_kernel(vcpu->kvm))
- set_cr8(vcpu, kvm_run->cr8);
-
- if (vcpu->pio.cur_count) {
- r = complete_pio(vcpu);
- if (r)
- goto out;
- }
-
- if (vcpu->mmio_needed) {
- memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
- vcpu->mmio_read_completed = 1;
- vcpu->mmio_needed = 0;
- r = emulate_instruction(vcpu, kvm_run,
- vcpu->mmio_fault_cr2, 0, 1);
- if (r == EMULATE_DO_MMIO) {
- /*
- * Read-modify-write. Back to userspace.
- */
- r = 0;
- goto out;
- }
- }
-
- if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
- kvm_x86_ops->cache_regs(vcpu);
- vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
- kvm_x86_ops->decache_regs(vcpu);
- }
-
- r = __vcpu_run(vcpu, kvm_run);
-
-out:
- if (vcpu->sigset_active)
- sigprocmask(SIG_SETMASK, &sigsaved, NULL);
-
- vcpu_put(vcpu);
- return r;
-}
-
-static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
- struct kvm_regs *regs)
-{
- vcpu_load(vcpu);
-
- kvm_x86_ops->cache_regs(vcpu);
-
- regs->rax = vcpu->regs[VCPU_REGS_RAX];
- regs->rbx = vcpu->regs[VCPU_REGS_RBX];
- regs->rcx = vcpu->regs[VCPU_REGS_RCX];
- regs->rdx = vcpu->regs[VCPU_REGS_RDX];
- regs->rsi = vcpu->regs[VCPU_REGS_RSI];
- regs->rdi = vcpu->regs[VCPU_REGS_RDI];
- regs->rsp = vcpu->regs[VCPU_REGS_RSP];
- regs->rbp = vcpu->regs[VCPU_REGS_RBP];
-#ifdef CONFIG_X86_64
- regs->r8 = vcpu->regs[VCPU_REGS_R8];
- regs->r9 = vcpu->regs[VCPU_REGS_R9];
- regs->r10 = vcpu->regs[VCPU_REGS_R10];
- regs->r11 = vcpu->regs[VCPU_REGS_R11];
- regs->r12 = vcpu->regs[VCPU_REGS_R12];
- regs->r13 = vcpu->regs[VCPU_REGS_R13];
- regs->r14 = vcpu->regs[VCPU_REGS_R14];
- regs->r15 = vcpu->regs[VCPU_REGS_R15];
-#endif
-
- regs->rip = vcpu->rip;
- regs->rflags = kvm_x86_ops->get_rflags(vcpu);
-
- /*
- * Don't leak debug flags in case they were set for guest debugging
- */
- if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
- regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
- struct kvm_regs *regs)
-{
- vcpu_load(vcpu);
-
- vcpu->regs[VCPU_REGS_RAX] = regs->rax;
- vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
- vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
- vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
- vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
- vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
- vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
- vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
-#ifdef CONFIG_X86_64
- vcpu->regs[VCPU_REGS_R8] = regs->r8;
- vcpu->regs[VCPU_REGS_R9] = regs->r9;
- vcpu->regs[VCPU_REGS_R10] = regs->r10;
- vcpu->regs[VCPU_REGS_R11] = regs->r11;
- vcpu->regs[VCPU_REGS_R12] = regs->r12;
- vcpu->regs[VCPU_REGS_R13] = regs->r13;
- vcpu->regs[VCPU_REGS_R14] = regs->r14;
- vcpu->regs[VCPU_REGS_R15] = regs->r15;
-#endif
-
- vcpu->rip = regs->rip;
- kvm_x86_ops->set_rflags(vcpu, regs->rflags);
-
- kvm_x86_ops->decache_regs(vcpu);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static void get_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- return kvm_x86_ops->get_segment(vcpu, var, seg);
+ mark_page_dirty(kvm, gfn);
+ return 0;
}
+EXPORT_SYMBOL_GPL(kvm_write_guest_page);
-static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
+int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
+ unsigned long len)
{
- struct descriptor_table dt;
- int pending_vec;
-
- vcpu_load(vcpu);
-
- get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
- get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
- get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
- get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
- get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
- get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
-
- get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
- get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
-
- kvm_x86_ops->get_idt(vcpu, &dt);
- sregs->idt.limit = dt.limit;
- sregs->idt.base = dt.base;
- kvm_x86_ops->get_gdt(vcpu, &dt);
- sregs->gdt.limit = dt.limit;
- sregs->gdt.base = dt.base;
-
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
- sregs->cr0 = vcpu->cr0;
- sregs->cr2 = vcpu->cr2;
- sregs->cr3 = vcpu->cr3;
- sregs->cr4 = vcpu->cr4;
- sregs->cr8 = get_cr8(vcpu);
- sregs->efer = vcpu->shadow_efer;
- sregs->apic_base = kvm_get_apic_base(vcpu);
-
- if (irqchip_in_kernel(vcpu->kvm)) {
- memset(sregs->interrupt_bitmap, 0,
- sizeof sregs->interrupt_bitmap);
- pending_vec = kvm_x86_ops->get_irq(vcpu);
- if (pending_vec >= 0)
- set_bit(pending_vec,
- (unsigned long *)sregs->interrupt_bitmap);
- } else
- memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
- sizeof sregs->interrupt_bitmap);
-
- vcpu_put(vcpu);
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ data += seg;
+ ++gfn;
+ }
return 0;
}
-static void set_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
+int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
{
- return kvm_x86_ops->set_segment(vcpu, var, seg);
+ return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
}
+EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
-static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
- struct kvm_sregs *sregs)
+int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
{
- int mmu_reset_needed = 0;
- int i, pending_vec, max_bits;
- struct descriptor_table dt;
-
- vcpu_load(vcpu);
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
- dt.limit = sregs->idt.limit;
- dt.base = sregs->idt.base;
- kvm_x86_ops->set_idt(vcpu, &dt);
- dt.limit = sregs->gdt.limit;
- dt.base = sregs->gdt.base;
- kvm_x86_ops->set_gdt(vcpu, &dt);
-
- vcpu->cr2 = sregs->cr2;
- mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
- vcpu->cr3 = sregs->cr3;
-
- set_cr8(vcpu, sregs->cr8);
-
- mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
-#ifdef CONFIG_X86_64
- kvm_x86_ops->set_efer(vcpu, sregs->efer);
-#endif
- kvm_set_apic_base(vcpu, sregs->apic_base);
-
- kvm_x86_ops->decache_cr4_guest_bits(vcpu);
-
- mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
- vcpu->cr0 = sregs->cr0;
- kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
-
- mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
- kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
- if (!is_long_mode(vcpu) && is_pae(vcpu))
- load_pdptrs(vcpu, vcpu->cr3);
-
- if (mmu_reset_needed)
- kvm_mmu_reset_context(vcpu);
-
- if (!irqchip_in_kernel(vcpu->kvm)) {
- memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
- sizeof vcpu->irq_pending);
- vcpu->irq_summary = 0;
- for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
- if (vcpu->irq_pending[i])
- __set_bit(i, &vcpu->irq_summary);
- } else {
- max_bits = (sizeof sregs->interrupt_bitmap) << 3;
- pending_vec = find_first_bit(
- (const unsigned long *)sregs->interrupt_bitmap,
- max_bits);
- /* Only pending external irq is handled here */
- if (pending_vec < max_bits) {
- kvm_x86_ops->set_irq(vcpu, pending_vec);
- pr_debug("Set back pending irq %d\n",
- pending_vec);
- }
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ ++gfn;
}
-
- set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
- set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
- set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
- set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
- set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
- set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
-
- set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
- set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
-
- vcpu_put(vcpu);
-
return 0;
}
+EXPORT_SYMBOL_GPL(kvm_clear_guest);
-void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
+void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
{
- struct kvm_segment cs;
+ struct kvm_memory_slot *memslot;
- get_segment(vcpu, &cs, VCPU_SREG_CS);
- *db = cs.db;
- *l = cs.l;
+ gfn = unalias_gfn(kvm, gfn);
+ memslot = __gfn_to_memslot(kvm, gfn);
+ if (memslot && memslot->dirty_bitmap) {
+ unsigned long rel_gfn = gfn - memslot->base_gfn;
+
+ /* avoid RMW */
+ if (!test_bit(rel_gfn, memslot->dirty_bitmap))
+ set_bit(rel_gfn, memslot->dirty_bitmap);
+ }
}
-EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
/*
- * Translate a guest virtual address to a guest physical address.
+ * The vCPU has executed a HLT instruction with in-kernel mode enabled.
*/
-static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
- struct kvm_translation *tr)
+void kvm_vcpu_block(struct kvm_vcpu *vcpu)
{
- unsigned long vaddr = tr->linear_address;
- gpa_t gpa;
+ DECLARE_WAITQUEUE(wait, current);
- vcpu_load(vcpu);
- mutex_lock(&vcpu->kvm->lock);
- gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
- tr->physical_address = gpa;
- tr->valid = gpa != UNMAPPED_GVA;
- tr->writeable = 1;
- tr->usermode = 0;
- mutex_unlock(&vcpu->kvm->lock);
- vcpu_put(vcpu);
+ add_wait_queue(&vcpu->wq, &wait);
- return 0;
+ /*
+ * We will block until either an interrupt or a signal wakes us up
+ */
+ while (!kvm_cpu_has_interrupt(vcpu)
+ && !signal_pending(current)
+ && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
+ && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ vcpu_put(vcpu);
+ schedule();
+ vcpu_load(vcpu);
+ }
+
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&vcpu->wq, &wait);
+}
+
+void kvm_resched(struct kvm_vcpu *vcpu)
+{
+ if (!need_resched())
+ return;
+ cond_resched();
}
+EXPORT_SYMBOL_GPL(kvm_resched);
static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
struct kvm_interrupt *irq)
return 0;
}
-static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
- struct kvm_debug_guest *dbg)
-{
- int r;
-
- vcpu_load(vcpu);
-
- r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
-
- vcpu_put(vcpu);
-
- return r;
-}
-
static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
unsigned long address,
int *type)
if (!valid_vcpu(n))
return -EINVAL;
- vcpu = kvm_x86_ops->vcpu_create(kvm, n);
+ vcpu = kvm_arch_vcpu_create(kvm, n);
if (IS_ERR(vcpu))
return PTR_ERR(vcpu);
preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
- /* We do fxsave: this must be aligned. */
- BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
-
- vcpu_load(vcpu);
- r = kvm_mmu_setup(vcpu);
- vcpu_put(vcpu);
- if (r < 0)
- goto free_vcpu;
+ r = kvm_arch_vcpu_setup(vcpu);
+ if (r)
+ goto vcpu_destroy;
mutex_lock(&kvm->lock);
if (kvm->vcpus[n]) {
r = -EEXIST;
mutex_unlock(&kvm->lock);
- goto mmu_unload;
+ goto vcpu_destroy;
}
kvm->vcpus[n] = vcpu;
mutex_unlock(&kvm->lock);
mutex_lock(&kvm->lock);
kvm->vcpus[n] = NULL;
mutex_unlock(&kvm->lock);
-
-mmu_unload:
- vcpu_load(vcpu);
- kvm_mmu_unload(vcpu);
- vcpu_put(vcpu);
-
-free_vcpu:
- kvm_x86_ops->vcpu_free(vcpu);
+vcpu_destroy:
+ kvm_arch_vcpu_destroy(vcpu);
return r;
}
return 0;
}
-/*
- * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
- * we have asm/x86/processor.h
- */
-struct fxsave {
- u16 cwd;
- u16 swd;
- u16 twd;
- u16 fop;
- u64 rip;
- u64 rdp;
- u32 mxcsr;
- u32 mxcsr_mask;
- u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
-#ifdef CONFIG_X86_64
- u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
-#else
- u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
-#endif
-};
-
-static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
- struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
-
- vcpu_load(vcpu);
-
- memcpy(fpu->fpr, fxsave->st_space, 128);
- fpu->fcw = fxsave->cwd;
- fpu->fsw = fxsave->swd;
- fpu->ftwx = fxsave->twd;
- fpu->last_opcode = fxsave->fop;
- fpu->last_ip = fxsave->rip;
- fpu->last_dp = fxsave->rdp;
- memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
-{
- struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
-
- vcpu_load(vcpu);
-
- memcpy(fxsave->st_space, fpu->fpr, 128);
- fxsave->cwd = fpu->fcw;
- fxsave->swd = fpu->fsw;
- fxsave->twd = fpu->ftwx;
- fxsave->fop = fpu->last_opcode;
- fxsave->rip = fpu->last_ip;
- fxsave->rdp = fpu->last_dp;
- memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
-
- vcpu_put(vcpu);
-
- return 0;
-}
-
static long kvm_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int r;
+ if (vcpu->kvm->mm != current->mm)
+ return -EIO;
switch (ioctl) {
case KVM_RUN:
r = -EINVAL;
if (arg)
goto out;
- r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
+ r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
break;
case KVM_GET_REGS: {
struct kvm_regs kvm_regs;
memset(&kvm_regs, 0, sizeof kvm_regs);
- r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
+ r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
if (r)
goto out;
r = -EFAULT;
r = -EFAULT;
if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
goto out;
- r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
+ r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
if (r)
goto out;
r = 0;
struct kvm_sregs kvm_sregs;
memset(&kvm_sregs, 0, sizeof kvm_sregs);
- r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
+ r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
if (r)
goto out;
r = -EFAULT;
r = -EFAULT;
if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
goto out;
- r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
+ r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
if (r)
goto out;
r = 0;
r = -EFAULT;
if (copy_from_user(&tr, argp, sizeof tr))
goto out;
- r = kvm_vcpu_ioctl_translate(vcpu, &tr);
+ r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr);
if (r)
goto out;
r = -EFAULT;
r = -EFAULT;
if (copy_from_user(&dbg, argp, sizeof dbg))
goto out;
- r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
+ r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
if (r)
goto out;
r = 0;
struct kvm_fpu fpu;
memset(&fpu, 0, sizeof fpu);
- r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
+ r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, &fpu);
if (r)
goto out;
r = -EFAULT;
r = -EFAULT;
if (copy_from_user(&fpu, argp, sizeof fpu))
goto out;
- r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
+ r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, &fpu);
if (r)
goto out;
r = 0;
{
struct kvm *kvm = filp->private_data;
void __user *argp = (void __user *)arg;
- int r = -EINVAL;
+ int r;
+ if (kvm->mm != current->mm)
+ return -EIO;
switch (ioctl) {
case KVM_CREATE_VCPU:
r = kvm_vm_ioctl_create_vcpu(kvm, arg);
if (r < 0)
goto out;
break;
- case KVM_SET_MEMORY_REGION: {
- struct kvm_memory_region kvm_mem;
- struct kvm_userspace_memory_region kvm_userspace_mem;
-
- r = -EFAULT;
- if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
- goto out;
- kvm_userspace_mem.slot = kvm_mem.slot;
- kvm_userspace_mem.flags = kvm_mem.flags;
- kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
- kvm_userspace_mem.memory_size = kvm_mem.memory_size;
- r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
- if (r)
- goto out;
- break;
- }
case KVM_SET_USER_MEMORY_REGION: {
struct kvm_userspace_memory_region kvm_userspace_mem;
goto out;
break;
}
- case KVM_SET_NR_MMU_PAGES:
- r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
- if (r)
- goto out;
- break;
- case KVM_GET_NR_MMU_PAGES:
- r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
- break;
case KVM_GET_DIRTY_LOG: {
struct kvm_dirty_log log;
goto out;
break;
}
- case KVM_SET_MEMORY_ALIAS: {
- struct kvm_memory_alias alias;
-
- r = -EFAULT;
- if (copy_from_user(&alias, argp, sizeof alias))
- goto out;
- r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
- if (r)
- goto out;
- break;
- }
- case KVM_CREATE_IRQCHIP:
- r = -ENOMEM;
- kvm->vpic = kvm_create_pic(kvm);
- if (kvm->vpic) {
- r = kvm_ioapic_init(kvm);
- if (r) {
- kfree(kvm->vpic);
- kvm->vpic = NULL;
- goto out;
- }
- } else
- goto out;
- break;
- case KVM_IRQ_LINE: {
- struct kvm_irq_level irq_event;
-
- r = -EFAULT;
- if (copy_from_user(&irq_event, argp, sizeof irq_event))
- goto out;
- if (irqchip_in_kernel(kvm)) {
- mutex_lock(&kvm->lock);
- if (irq_event.irq < 16)
- kvm_pic_set_irq(pic_irqchip(kvm),
- irq_event.irq,
- irq_event.level);
- kvm_ioapic_set_irq(kvm->vioapic,
- irq_event.irq,
- irq_event.level);
- mutex_unlock(&kvm->lock);
- r = 0;
- }
- break;
- }
- case KVM_GET_IRQCHIP: {
- /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
- struct kvm_irqchip chip;
-
- r = -EFAULT;
- if (copy_from_user(&chip, argp, sizeof chip))
- goto out;
- r = -ENXIO;
- if (!irqchip_in_kernel(kvm))
- goto out;
- r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &chip, sizeof chip))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_IRQCHIP: {
- /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
- struct kvm_irqchip chip;
-
- r = -EFAULT;
- if (copy_from_user(&chip, argp, sizeof chip))
- goto out;
- r = -ENXIO;
- if (!irqchip_in_kernel(kvm))
- goto out;
- r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
- if (r)
- goto out;
- r = 0;
- break;
- }
default:
- ;
+ r = kvm_arch_vm_ioctl(filp, ioctl, arg);
}
out:
return r;
struct page *page;
pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
- page = gfn_to_page(kvm, pgoff);
- if (is_error_page(page))
+ if (!kvm_is_visible_gfn(kvm, pgoff))
return NOPAGE_SIGBUS;
- get_page(page);
+ /* current->mm->mmap_sem is already held so call lockless version */
+ page = __gfn_to_page(kvm, pgoff);
+ if (is_error_page(page)) {
+ kvm_release_page_clean(page);
+ return NOPAGE_SIGBUS;
+ }
if (type != NULL)
*type = VM_FAULT_MINOR;
goto out;
r = kvm_dev_ioctl_create_vm();
break;
- case KVM_CHECK_EXTENSION: {
- int ext = (long)argp;
-
- switch (ext) {
- case KVM_CAP_IRQCHIP:
- case KVM_CAP_HLT:
- case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
- case KVM_CAP_USER_MEMORY:
- r = 1;
- break;
- default:
- r = 0;
- break;
- }
+ case KVM_CHECK_EXTENSION:
+ r = kvm_dev_ioctl_check_extension((long)argp);
break;
- }
case KVM_GET_VCPU_MMAP_SIZE:
r = -EINVAL;
if (arg)
&kvm_chardev_ops,
};
-/*
- * Make sure that a cpu that is being hot-unplugged does not have any vcpus
- * cached on it.
- */
-static void decache_vcpus_on_cpu(int cpu)
-{
- struct kvm *vm;
- struct kvm_vcpu *vcpu;
- int i;
-
- spin_lock(&kvm_lock);
- list_for_each_entry(vm, &vm_list, vm_list)
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = vm->vcpus[i];
- if (!vcpu)
- continue;
- /*
- * If the vcpu is locked, then it is running on some
- * other cpu and therefore it is not cached on the
- * cpu in question.
- *
- * If it's not locked, check the last cpu it executed
- * on.
- */
- if (mutex_trylock(&vcpu->mutex)) {
- if (vcpu->cpu == cpu) {
- kvm_x86_ops->vcpu_decache(vcpu);
- vcpu->cpu = -1;
- }
- mutex_unlock(&vcpu->mutex);
- }
- }
- spin_unlock(&kvm_lock);
-}
-
static void hardware_enable(void *junk)
{
int cpu = raw_smp_processor_id();
if (cpu_isset(cpu, cpus_hardware_enabled))
return;
cpu_set(cpu, cpus_hardware_enabled);
- kvm_x86_ops->hardware_enable(NULL);
+ kvm_arch_hardware_enable(NULL);
}
static void hardware_disable(void *junk)
return;
cpu_clear(cpu, cpus_hardware_enabled);
decache_vcpus_on_cpu(cpu);
- kvm_x86_ops->hardware_disable(NULL);
+ kvm_arch_hardware_disable(NULL);
}
static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
{
int cpu = (long)v;
+ val &= ~CPU_TASKS_FROZEN;
switch (val) {
case CPU_DYING:
- case CPU_DYING_FROZEN:
printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
cpu);
hardware_disable(NULL);
break;
case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
cpu);
smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
break;
case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
cpu);
smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
.priority = 20, /* must be > scheduler priority */
};
-static u64 stat_get(void *_offset)
+static u64 vm_stat_get(void *_offset)
+{
+ unsigned offset = (long)_offset;
+ u64 total = 0;
+ struct kvm *kvm;
+
+ spin_lock(&kvm_lock);
+ list_for_each_entry(kvm, &vm_list, vm_list)
+ total += *(u32 *)((void *)kvm + offset);
+ spin_unlock(&kvm_lock);
+ return total;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n");
+
+static u64 vcpu_stat_get(void *_offset)
{
unsigned offset = (long)_offset;
u64 total = 0;
return total;
}
-DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
+DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n");
+
+static struct file_operations *stat_fops[] = {
+ [KVM_STAT_VCPU] = &vcpu_stat_fops,
+ [KVM_STAT_VM] = &vm_stat_fops,
+};
-static __init void kvm_init_debug(void)
+static void kvm_init_debug(void)
{
struct kvm_stats_debugfs_item *p;
for (p = debugfs_entries; p->name; ++p)
p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
(void *)(long)p->offset,
- &stat_fops);
+ stat_fops[p->kind]);
}
static void kvm_exit_debug(void)
{
struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
- kvm_x86_ops->vcpu_load(vcpu, cpu);
+ kvm_arch_vcpu_load(vcpu, cpu);
}
static void kvm_sched_out(struct preempt_notifier *pn,
{
struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
- kvm_x86_ops->vcpu_put(vcpu);
+ kvm_arch_vcpu_put(vcpu);
}
-int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
+int kvm_init(void *opaque, unsigned int vcpu_size,
struct module *module)
{
int r;
int cpu;
- if (kvm_x86_ops) {
- printk(KERN_ERR "kvm: already loaded the other module\n");
- return -EEXIST;
- }
+ kvm_init_debug();
- if (!ops->cpu_has_kvm_support()) {
- printk(KERN_ERR "kvm: no hardware support\n");
- return -EOPNOTSUPP;
- }
- if (ops->disabled_by_bios()) {
- printk(KERN_ERR "kvm: disabled by bios\n");
- return -EOPNOTSUPP;
- }
+ r = kvm_arch_init(opaque);
+ if (r)
+ goto out4;
+
+ bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- kvm_x86_ops = ops;
+ if (bad_page == NULL) {
+ r = -ENOMEM;
+ goto out;
+ }
- r = kvm_x86_ops->hardware_setup();
+ r = kvm_arch_hardware_setup();
if (r < 0)
goto out;
for_each_online_cpu(cpu) {
smp_call_function_single(cpu,
- kvm_x86_ops->check_processor_compatibility,
+ kvm_arch_check_processor_compat,
&r, 0, 1);
if (r < 0)
goto out_free_0;
/* A kmem cache lets us meet the alignment requirements of fx_save. */
kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
- __alignof__(struct kvm_vcpu), 0, 0);
+ __alignof__(struct kvm_vcpu),
+ 0, NULL);
if (!kvm_vcpu_cache) {
r = -ENOMEM;
goto out_free_4;
kvm_preempt_ops.sched_in = kvm_sched_in;
kvm_preempt_ops.sched_out = kvm_sched_out;
- kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
-
return 0;
out_free:
out_free_1:
on_each_cpu(hardware_disable, NULL, 0, 1);
out_free_0:
- kvm_x86_ops->hardware_unsetup();
+ kvm_arch_hardware_unsetup();
out:
- kvm_x86_ops = NULL;
+ kvm_arch_exit();
+ kvm_exit_debug();
+out4:
return r;
}
-EXPORT_SYMBOL_GPL(kvm_init_x86);
+EXPORT_SYMBOL_GPL(kvm_init);
-void kvm_exit_x86(void)
+void kvm_exit(void)
{
misc_deregister(&kvm_dev);
kmem_cache_destroy(kvm_vcpu_cache);
unregister_reboot_notifier(&kvm_reboot_notifier);
unregister_cpu_notifier(&kvm_cpu_notifier);
on_each_cpu(hardware_disable, NULL, 0, 1);
- kvm_x86_ops->hardware_unsetup();
- kvm_x86_ops = NULL;
-}
-EXPORT_SYMBOL_GPL(kvm_exit_x86);
-
-static __init int kvm_init(void)
-{
- int r;
-
- r = kvm_mmu_module_init();
- if (r)
- goto out4;
-
- kvm_init_debug();
-
- kvm_arch_init();
-
- bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
-
- if (bad_page == NULL) {
- r = -ENOMEM;
- goto out;
- }
-
- return 0;
-
-out:
- kvm_exit_debug();
- kvm_mmu_module_exit();
-out4:
- return r;
-}
-
-static __exit void kvm_exit(void)
-{
+ kvm_arch_hardware_unsetup();
+ kvm_arch_exit();
kvm_exit_debug();
__free_page(bad_page);
- kvm_mmu_module_exit();
}
-
-module_init(kvm_init)
-module_exit(kvm_exit)
+EXPORT_SYMBOL_GPL(kvm_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff