*/
#include "kvm.h"
+#include "x86.h"
#include "x86_emulate.h"
-#include "segment_descriptor.h"
#include "irq.h"
#include <linux/kvm.h>
#include <linux/smp.h>
#include <linux/anon_inodes.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>
static struct dentry *debugfs_dir;
-#define MAX_IO_MSRS 256
-
-#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;
- typedef unsigned long ul;
- 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 | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
-#ifdef CONFIG_X86_64
- if (d->system == 0
- && (d->type == 2 || d->type == 9 || d->type == 11))
- v |= ((ul)((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);
/*
* Switches to specified vcpu, until a matching vcpu_put()
*/
-static void vcpu_load(struct kvm_vcpu *vcpu)
+void vcpu_load(struct kvm_vcpu *vcpu)
{
int cpu;
mutex_lock(&vcpu->mutex);
cpu = get_cpu();
preempt_notifier_register(&vcpu->preempt_notifier);
- kvm_x86_ops->vcpu_load(vcpu, cpu);
+ kvm_arch_vcpu_load(vcpu, cpu);
put_cpu();
}
-static void vcpu_put(struct kvm_vcpu *vcpu)
+void vcpu_put(struct kvm_vcpu *vcpu)
{
preempt_disable();
- kvm_x86_ops->vcpu_put(vcpu);
+ kvm_arch_vcpu_put(vcpu);
preempt_notifier_unregister(&vcpu->preempt_notifier);
preempt_enable();
mutex_unlock(&vcpu->mutex);
static void ack_flush(void *_completed)
{
- atomic_t *completed = _completed;
-
- atomic_inc(completed);
}
void kvm_flush_remote_tlbs(struct kvm *kvm)
{
- int i, cpu, needed;
+ int i, cpu;
cpumask_t cpus;
struct kvm_vcpu *vcpu;
- atomic_t completed;
- atomic_set(&completed, 0);
cpus_clear(cpus);
- needed = 0;
for (i = 0; i < KVM_MAX_VCPUS; ++i) {
vcpu = kvm->vcpus[i];
if (!vcpu)
continue;
- if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests))
+ if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
continue;
cpu = vcpu->cpu;
if (cpu != -1 && cpu != raw_smp_processor_id())
- if (!cpu_isset(cpu, cpus)) {
- cpu_set(cpu, cpus);
- ++needed;
- }
- }
-
- /*
- * We really want smp_call_function_mask() here. But that's not
- * available, so ipi all cpus in parallel and wait for them
- * to complete.
- */
- for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus))
- smp_call_function_single(cpu, ack_flush, &completed, 1, 0);
- while (atomic_read(&completed) != needed) {
- cpu_relax();
- barrier();
+ cpu_set(cpu, cpus);
}
+ smp_call_function_mask(cpus, ack_flush, NULL, 1);
}
int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
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;
+ }
+
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:
- return -ENOMEM;
+ return r;
}
EXPORT_SYMBOL_GPL(kvm_vcpu_init);
void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
{
+ kvm_free_lapic(vcpu);
kvm_mmu_destroy(vcpu);
- if (vcpu->apic)
- hrtimer_cancel(&vcpu->apic->timer.dev);
- kvm_free_apic(vcpu->apic);
free_page((unsigned long)vcpu->pio_data);
free_page((unsigned long)vcpu->run);
}
static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
struct kvm_memory_slot *dont)
{
- int i;
-
- if (!dont || free->phys_mem != dont->phys_mem)
- if (free->phys_mem) {
- for (i = 0; i < free->npages; ++i)
- if (free->phys_mem[i])
- __free_page(free->phys_mem[i]);
- 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)
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);
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;
- u64 *pdpt;
- int ret;
- struct page *page;
- u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
-
- mutex_lock(&vcpu->kvm->lock);
- page = gfn_to_page(vcpu->kvm, pdpt_gfn);
- if (!page) {
- ret = 0;
- goto out;
- }
-
- pdpt = kmap_atomic(page, KM_USER0);
- memcpy(pdpte, pdpt+offset, sizeof(pdpte));
- kunmap_atomic(pdpt, KM_USER0);
-
- 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;
- }
- } else {
- if (cr3 & CR3_NONPAE_RESERVED_BITS) {
- printk(KERN_DEBUG
- "set_cr3: #GP, reserved bits\n");
- inject_gp(vcpu);
- return;
- }
- }
- }
-
- 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;
* 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_memory_region *mem)
+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;
-
- memset(new.phys_mem, 0, npages * sizeof(struct page *));
- for (i = 0; i < npages; ++i) {
- new.phys_mem[i] = alloc_page(GFP_HIGHUSER
- | __GFP_ZERO);
- if (!new.phys_mem[i])
- goto out_unlock;
- set_page_private(new.phys_mem[i],0);
+ if (npages && !new.rmap) {
+ new.rmap = vmalloc(npages * sizeof(struct page *));
+
+ if (!new.rmap)
+ goto out_free;
+
+ memset(new.rmap, 0, npages * sizeof(*new.rmap));
+
+ new.user_alloc = user_alloc;
+ if (user_alloc)
+ new.userspace_addr = mem->userspace_addr;
+ else {
+ down_write(¤t->mm->mmap_sem);
+ new.userspace_addr = do_mmap(NULL, 0,
+ npages * PAGE_SIZE,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS,
+ 0);
+ up_write(¤t->mm->mmap_sem);
+
+ if (IS_ERR((void *)new.userspace_addr))
+ goto out_free;
+ }
+ } else {
+ if (!old.user_alloc && old.rmap) {
+ int ret;
+
+ down_write(¤t->mm->mmap_sem);
+ ret = do_munmap(current->mm, old.userspace_addr,
+ old.npages * PAGE_SIZE);
+ up_write(¤t->mm->mmap_sem);
+ if (ret < 0)
+ printk(KERN_WARNING
+ "kvm_vm_ioctl_set_memory_region: "
+ "failed to munmap memory\n");
}
}
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);
-
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);
+
+int kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ int r;
+
+ mutex_lock(&kvm->lock);
+ r = __kvm_set_memory_region(kvm, mem, user_alloc);
+ mutex_unlock(&kvm->lock);
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_set_memory_region);
+
+int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
+ struct
+ kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ if (mem->slot >= KVM_MEMORY_SLOTS)
+ return -EINVAL;
+ return kvm_set_memory_region(kvm, mem, user_alloc);
}
/*
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 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;
-
- for (n = KVM_ALIAS_SLOTS; n > 0; --n)
- if (kvm->aliases[n - 1].npages)
- break;
- kvm->naliases = n;
-
- kvm_mmu_zap_all(kvm);
-
- mutex_unlock(&kvm->lock);
-
- return 0;
-
-out:
- return r;
-}
-
-static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
-{
- 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;
-}
-
-static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
+int is_error_page(struct page *page)
{
- int r;
-
- 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;
- }
- kvm_pic_update_irq(pic_irqchip(kvm));
- return r;
+ return page == bad_page;
}
+EXPORT_SYMBOL_GPL(is_error_page);
-static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
+gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
struct kvm_mem_alias *alias;
return __gfn_to_memslot(kvm, gfn);
}
-struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
+int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
{
- struct kvm_memory_slot *slot;
+ int i;
gfn = unalias_gfn(kvm, gfn);
- slot = __gfn_to_memslot(kvm, gfn);
- if (!slot)
- return NULL;
- return slot->phys_mem[gfn - slot->base_gfn];
-}
-EXPORT_SYMBOL_GPL(gfn_to_page);
-
-/* 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;
+ for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
+ struct kvm_memory_slot *memslot = &kvm->memslots[i];
- /* avoid RMW */
- if (!test_bit(rel_gfn, memslot->dirty_bitmap))
- set_bit(rel_gfn, memslot->dirty_bitmap);
+ if (gfn >= memslot->base_gfn
+ && gfn < memslot->base_gfn + memslot->npages)
+ return 1;
}
+ return 0;
}
+EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
-int emulator_read_std(unsigned long addr,
- void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
+/*
+ * Requires current->mm->mmap_sem to be held
+ */
+static struct page *__gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
- 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);
- unsigned long pfn;
- struct page *page;
- void *page_virt;
-
- if (gpa == UNMAPPED_GVA)
- return X86EMUL_PROPAGATE_FAULT;
- pfn = gpa >> PAGE_SHIFT;
- page = gfn_to_page(vcpu->kvm, pfn);
- if (!page)
- return X86EMUL_UNHANDLEABLE;
- page_virt = kmap_atomic(page, KM_USER0);
+ struct kvm_memory_slot *slot;
+ struct page *page[1];
+ int npages;
- memcpy(data, page_virt + offset, tocopy);
+ might_sleep();
- kunmap_atomic(page_virt, KM_USER0);
+ gfn = unalias_gfn(kvm, gfn);
+ slot = __gfn_to_memslot(kvm, gfn);
+ if (!slot) {
+ get_page(bad_page);
+ return bad_page;
+ }
- bytes -= tocopy;
- data += tocopy;
- addr += tocopy;
+ npages = get_user_pages(current, current->mm,
+ slot->userspace_addr
+ + (gfn - slot->base_gfn) * PAGE_SIZE, 1,
+ 1, 1, page, NULL);
+ if (npages != 1) {
+ get_page(bad_page);
+ return bad_page;
}
- return X86EMUL_CONTINUE;
+ return page[0];
}
-EXPORT_SYMBOL_GPL(emulator_read_std);
-static int emulator_write_std(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
+struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
{
- pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
- return X86EMUL_UNHANDLEABLE;
-}
+ struct page *page;
-/*
- * 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;
+ down_read(¤t->mm->mmap_sem);
+ page = __gfn_to_page(kvm, gfn);
+ up_read(¤t->mm->mmap_sem);
- if (vcpu->apic) {
- dev = &vcpu->apic->dev;
- if (dev->in_range(dev, addr))
- return dev;
- }
- return NULL;
+ return page;
}
-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;
-}
+EXPORT_SYMBOL_GPL(gfn_to_page);
-static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr)
+void kvm_release_page(struct page *page)
{
- return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
+ if (!PageReserved(page))
+ SetPageDirty(page);
+ put_page(page);
}
+EXPORT_SYMBOL_GPL(kvm_release_page);
-static int emulator_read_emulated(unsigned long addr,
- void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
+static int next_segment(unsigned long len, int offset)
{
- 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;
+ if (len > PAGE_SIZE - offset)
+ return PAGE_SIZE - offset;
+ else
+ return len;
}
-static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
- const void *val, int bytes)
+int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
+ int len)
{
+ void *page_virt;
struct page *page;
- void *virt;
- if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
- return 0;
- page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
- if (!page)
- return 0;
- mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
- virt = kmap_atomic(page, KM_USER0);
- kvm_mmu_pte_write(vcpu, gpa, val, bytes);
- memcpy(virt + offset_in_page(gpa), val, bytes);
- kunmap_atomic(virt, KM_USER0);
- 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;
+ page = gfn_to_page(kvm, gfn);
+ if (is_error_page(page)) {
+ kvm_release_page(page);
+ return -EFAULT;
}
+ page_virt = kmap_atomic(page, KM_USER0);
- if (emulator_write_phys(vcpu, gpa, val, bytes))
- return X86EMUL_CONTINUE;
+ memcpy(data, page_virt + offset, len);
- /*
- * 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;
+ kunmap_atomic(page_virt, KM_USER0);
+ kvm_release_page(page);
+ return 0;
}
+EXPORT_SYMBOL_GPL(kvm_read_guest_page);
-int emulator_write_emulated(unsigned long addr,
- const void *val,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
+int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
{
- /* Crossing a page boundary? */
- if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
- int rc, now;
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
- 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;
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ data += seg;
+ ++gfn;
}
- return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
+ return 0;
}
-EXPORT_SYMBOL_GPL(emulator_write_emulated);
+EXPORT_SYMBOL_GPL(kvm_read_guest);
-static int emulator_cmpxchg_emulated(unsigned long addr,
- const void *old,
- const void *new,
- unsigned int bytes,
- struct kvm_vcpu *vcpu)
+int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
+ int offset, int len)
{
- static int reported;
+ void *page_virt;
+ struct page *page;
- if (!reported) {
- reported = 1;
- printk(KERN_WARNING "kvm: emulating exchange as write\n");
+ page = gfn_to_page(kvm, gfn);
+ if (is_error_page(page)) {
+ kvm_release_page(page);
+ return -EFAULT;
}
- 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);
-}
+ page_virt = kmap_atomic(page, KM_USER0);
-int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
-{
- return X86EMUL_CONTINUE;
-}
+ memcpy(page_virt + offset, data, len);
-int emulate_clts(struct kvm_vcpu *vcpu)
-{
- vcpu->cr0 &= ~X86_CR0_TS;
- kvm_x86_ops->set_cr0(vcpu, vcpu->cr0);
- return X86EMUL_CONTINUE;
+ kunmap_atomic(page_virt, KM_USER0);
+ mark_page_dirty(kvm, gfn);
+ kvm_release_page(page);
+ return 0;
}
+EXPORT_SYMBOL_GPL(kvm_write_guest_page);
-int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
+int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
+ unsigned long len)
{
- struct kvm_vcpu *vcpu = ctxt->vcpu;
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
- 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;
+ 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 emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
+int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
{
- unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
- int exception;
+ void *page_virt;
+ struct page *page;
- kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
- if (exception) {
- /* FIXME: better handling */
- return X86EMUL_UNHANDLEABLE;
+ page = gfn_to_page(kvm, gfn);
+ if (is_error_page(page)) {
+ kvm_release_page(page);
+ return -EFAULT;
}
- 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;
+ page_virt = kmap_atomic(page, KM_USER0);
- rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
-
- if (reported)
- return;
+ memset(page_virt + offset, 0, len);
- 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;
+ kunmap_atomic(page_virt, KM_USER0);
+ kvm_release_page(page);
+ return 0;
}
-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,
-};
+EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
-int emulate_instruction(struct kvm_vcpu *vcpu,
- struct kvm_run *run,
- unsigned long cr2,
- u16 error_code)
+int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
{
- struct x86_emulate_ctxt emulate_ctxt;
- int r;
- int cs_db, cs_l;
-
- vcpu->mmio_fault_cr2 = cr2;
- kvm_x86_ops->cache_regs(vcpu);
-
- kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
-
- emulate_ctxt.vcpu = vcpu;
- emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
- emulate_ctxt.cr2 = cr2;
- emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM)
- ? X86EMUL_MODE_REAL : cs_l
- ? X86EMUL_MODE_PROT64 : cs_db
- ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
-
- if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
- emulate_ctxt.cs_base = 0;
- emulate_ctxt.ds_base = 0;
- emulate_ctxt.es_base = 0;
- emulate_ctxt.ss_base = 0;
- } else {
- emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS);
- emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS);
- emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES);
- emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS);
- }
-
- emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS);
- emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS);
-
- vcpu->mmio_is_write = 0;
- vcpu->pio.string = 0;
- r = x86_emulate_memop(&emulate_ctxt, &emulate_ops);
- if (vcpu->pio.string)
- return EMULATE_DO_MMIO;
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
- 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;
+ 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);
- 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;
- }
+void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
+{
+ struct kvm_memory_slot *memslot;
- kvm_x86_ops->decache_regs(vcpu);
- kvm_x86_ops->set_rflags(vcpu, emulate_ctxt.eflags);
+ gfn = unalias_gfn(kvm, gfn);
+ memslot = __gfn_to_memslot(kvm, gfn);
+ if (memslot && memslot->dirty_bitmap) {
+ unsigned long rel_gfn = gfn - memslot->base_gfn;
- if (vcpu->mmio_is_write) {
- vcpu->mmio_needed = 0;
- return EMULATE_DO_MMIO;
+ /* avoid RMW */
+ if (!test_bit(rel_gfn, memslot->dirty_bitmap))
+ set_bit(rel_gfn, memslot->dirty_bitmap);
}
-
- return EMULATE_DONE;
}
-EXPORT_SYMBOL_GPL(emulate_instruction);
/*
* The vCPU has executed a HLT instruction with in-kernel mode enabled.
}
EXPORT_SYMBOL_GPL(kvm_emulate_halt);
-int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
+int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
{
- unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
+ unsigned long nr, a0, a1, a2, a3, ret;
kvm_x86_ops->cache_regs(vcpu);
- ret = -KVM_EINVAL;
-#ifdef CONFIG_X86_64
- if (is_long_mode(vcpu)) {
- nr = vcpu->regs[VCPU_REGS_RAX];
- a0 = vcpu->regs[VCPU_REGS_RDI];
- a1 = vcpu->regs[VCPU_REGS_RSI];
- a2 = vcpu->regs[VCPU_REGS_RDX];
- a3 = vcpu->regs[VCPU_REGS_RCX];
- a4 = vcpu->regs[VCPU_REGS_R8];
- a5 = vcpu->regs[VCPU_REGS_R9];
- } else
-#endif
- {
- nr = vcpu->regs[VCPU_REGS_RBX] & -1u;
- a0 = vcpu->regs[VCPU_REGS_RAX] & -1u;
- a1 = vcpu->regs[VCPU_REGS_RCX] & -1u;
- a2 = vcpu->regs[VCPU_REGS_RDX] & -1u;
- a3 = vcpu->regs[VCPU_REGS_RSI] & -1u;
- a4 = vcpu->regs[VCPU_REGS_RDI] & -1u;
- a5 = vcpu->regs[VCPU_REGS_RBP] & -1u;
+
+ 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:
- run->hypercall.nr = nr;
- run->hypercall.args[0] = a0;
- run->hypercall.args[1] = a1;
- run->hypercall.args[2] = a2;
- run->hypercall.args[3] = a3;
- run->hypercall.args[4] = a4;
- run->hypercall.args[5] = a5;
- run->hypercall.ret = ret;
- run->hypercall.longmode = is_long_mode(vcpu);
- kvm_x86_ops->decache_regs(vcpu);
- return 0;
+ ret = -KVM_ENOSYS;
+ break;
}
vcpu->regs[VCPU_REGS_RAX] = ret;
kvm_x86_ops->decache_regs(vcpu);
- return 1;
+ 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;
}
-EXPORT_SYMBOL_GPL(kvm_hypercall);
static u64 mk_cr_64(u64 curr_cr, u32 new_val)
{
set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
break;
default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
- }
-}
-
-/*
- * Register the para guest with the host:
- */
-static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa)
-{
- struct kvm_vcpu_para_state *para_state;
- hpa_t para_state_hpa, hypercall_hpa;
- struct page *para_state_page;
- unsigned char *hypercall;
- gpa_t hypercall_gpa;
-
- printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n");
- printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa);
-
- /*
- * Needs to be page aligned:
- */
- if (para_state_gpa != PAGE_ALIGN(para_state_gpa))
- goto err_gp;
-
- para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa);
- printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa);
- if (is_error_hpa(para_state_hpa))
- goto err_gp;
-
- mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT);
- para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT);
- para_state = kmap(para_state_page);
-
- printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version);
- printk(KERN_DEBUG ".... size: %d\n", para_state->size);
-
- para_state->host_version = KVM_PARA_API_VERSION;
- /*
- * We cannot support guests that try to register themselves
- * with a newer API version than the host supports:
- */
- if (para_state->guest_version > KVM_PARA_API_VERSION) {
- para_state->ret = -KVM_EINVAL;
- goto err_kunmap_skip;
- }
-
- hypercall_gpa = para_state->hypercall_gpa;
- hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa);
- printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa);
- if (is_error_hpa(hypercall_hpa)) {
- para_state->ret = -KVM_EINVAL;
- goto err_kunmap_skip;
- }
-
- printk(KERN_DEBUG "kvm: para guest successfully registered.\n");
- vcpu->para_state_page = para_state_page;
- vcpu->para_state_gpa = para_state_gpa;
- vcpu->hypercall_gpa = hypercall_gpa;
-
- mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT);
- hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT),
- KM_USER1) + (hypercall_hpa & ~PAGE_MASK);
- kvm_x86_ops->patch_hypercall(vcpu, hypercall);
- kunmap_atomic(hypercall, KM_USER1);
-
- para_state->ret = 0;
-err_kunmap_skip:
- kunmap(para_state_page);
- return 0;
-err_gp:
- return 1;
-}
-
-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;
- /*
- * This is the 'probe whether the host is KVM' logic:
- */
- case MSR_KVM_API_MAGIC:
- return vcpu_register_para(vcpu, data);
-
- 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;
+ vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
}
- 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)
+void kvm_resched(struct kvm_vcpu *vcpu)
{
- 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 (!need_resched())
+ return;
+ cond_resched();
+}
+EXPORT_SYMBOL_GPL(kvm_resched);
- 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) {
+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;
+ }
/*
- * String I/O in reverse. Yuck. Kill the guest, fix later.
+ * Both basic or both extended?
*/
- pr_unimpl(vcpu, "guest string pio down\n");
- inject_gp(vcpu);
- return 1;
+ if (((e->function ^ function) & 0x80000000) == 0)
+ if (!best || e->function > best->function)
+ best = e;
}
- 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;
- }
+ 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;
}
-
- 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;
+ kvm_x86_ops->decache_regs(vcpu);
+ kvm_x86_ops->skip_emulated_instruction(vcpu);
}
-EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
+EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
/*
* Check if userspace requested an interrupt window, and that the
int r;
if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
- printk("vcpu %d received sipi with vector # %x\n",
+ 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);
+ r = kvm_x86_ops->vcpu_reset(vcpu);
+ if (r)
+ return r;
vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
}
if (unlikely(r))
goto out;
+ kvm_inject_pending_timer_irqs(vcpu);
+
preempt_disable();
kvm_x86_ops->prepare_guest_switch(vcpu);
kvm_guest_enter();
if (vcpu->requests)
- if (test_and_clear_bit(KVM_TLB_FLUSH, &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);
- kvm_guest_exit();
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();
/*
if (r)
goto out;
}
-
+#if CONFIG_HAS_IOMEM
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);
+ vcpu->mmio_fault_cr2, 0, 1);
if (r == EMULATE_DO_MMIO) {
/*
* Read-modify-write. Back to userspace.
goto out;
}
}
-
+#endif
if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
kvm_x86_ops->cache_regs(vcpu);
vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
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);
+ set_bit(pending_vec,
+ (unsigned long *)sregs->interrupt_bitmap);
} else
memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
sizeof sregs->interrupt_bitmap);
/* Only pending external irq is handled here */
if (pending_vec < max_bits) {
kvm_x86_ops->set_irq(vcpu, pending_vec);
- printk("Set back pending irq %d\n", pending_vec);
+ pr_debug("Set back pending irq %d\n",
+ pending_vec);
}
}
}
EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
-/*
- * List of msr numbers which we expose to userspace through KVM_GET_MSRS
- * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
- *
- * This list is modified at module load time to reflect the
- * capabilities of the host cpu.
- */
-static u32 msrs_to_save[] = {
- MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
- MSR_K6_STAR,
-#ifdef CONFIG_X86_64
- MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
-#endif
- MSR_IA32_TIME_STAMP_COUNTER,
-};
-
-static unsigned num_msrs_to_save;
-
-static u32 emulated_msrs[] = {
- MSR_IA32_MISC_ENABLE,
-};
-
-static __init void kvm_init_msr_list(void)
-{
- u32 dummy[2];
- unsigned i, j;
-
- for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
- if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
- continue;
- if (j < i)
- msrs_to_save[j] = msrs_to_save[i];
- j++;
- }
- num_msrs_to_save = j;
-}
-
-/*
- * Adapt set_msr() to msr_io()'s calling convention
- */
-static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
-{
- return kvm_set_msr(vcpu, index, *data);
-}
-
-/*
- * Read or write a bunch of msrs. All parameters are kernel addresses.
- *
- * @return number of msrs set successfully.
- */
-static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
- struct kvm_msr_entry *entries,
- int (*do_msr)(struct kvm_vcpu *vcpu,
- unsigned index, u64 *data))
-{
- int i;
-
- vcpu_load(vcpu);
-
- for (i = 0; i < msrs->nmsrs; ++i)
- if (do_msr(vcpu, entries[i].index, &entries[i].data))
- break;
-
- vcpu_put(vcpu);
-
- return i;
-}
-
-/*
- * Read or write a bunch of msrs. Parameters are user addresses.
- *
- * @return number of msrs set successfully.
- */
-static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
- int (*do_msr)(struct kvm_vcpu *vcpu,
- unsigned index, u64 *data),
- int writeback)
-{
- struct kvm_msrs msrs;
- struct kvm_msr_entry *entries;
- int r, n;
- unsigned size;
-
- r = -EFAULT;
- if (copy_from_user(&msrs, user_msrs, sizeof msrs))
- goto out;
-
- r = -E2BIG;
- if (msrs.nmsrs >= MAX_IO_MSRS)
- goto out;
-
- r = -ENOMEM;
- size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
- entries = vmalloc(size);
- if (!entries)
- goto out;
-
- r = -EFAULT;
- if (copy_from_user(entries, user_msrs->entries, size))
- goto out_free;
-
- r = n = __msr_io(vcpu, &msrs, entries, do_msr);
- if (r < 0)
- goto out_free;
-
- r = -EFAULT;
- if (writeback && copy_to_user(user_msrs->entries, entries, size))
- goto out_free;
-
- r = n;
-
-out_free:
- vfree(entries);
-out:
- return r;
-}
-
/*
* Translate a guest virtual address to a guest physical address.
*/
BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
vcpu_load(vcpu);
- r = kvm_mmu_setup(vcpu);
+ r = kvm_x86_ops->vcpu_reset(vcpu);
+ if (r == 0)
+ r = kvm_mmu_setup(vcpu);
vcpu_put(vcpu);
if (r < 0)
goto free_vcpu;
return r;
}
-static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
-{
- u64 efer;
- int i;
- struct kvm_cpuid_entry *e, *entry;
-
- rdmsrl(MSR_EFER, efer);
- entry = NULL;
- for (i = 0; i < vcpu->cpuid_nent; ++i) {
- e = &vcpu->cpuid_entries[i];
- if (e->function == 0x80000001) {
- entry = e;
- break;
- }
- }
- if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
- entry->edx &= ~(1 << 20);
- printk(KERN_INFO "kvm: guest NX capability removed\n");
- }
-}
-
-static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
- struct kvm_cpuid *cpuid,
- struct kvm_cpuid_entry __user *entries)
-{
- int r;
-
- r = -E2BIG;
- if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
- goto out;
- r = -EFAULT;
- if (copy_from_user(&vcpu->cpuid_entries, entries,
- cpuid->nent * sizeof(struct kvm_cpuid_entry)))
- goto out;
- vcpu->cpuid_nent = cpuid->nent;
- cpuid_fix_nx_cap(vcpu);
- return 0;
-
-out:
- return r;
-}
-
static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
{
if (sigset) {
return 0;
}
-static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
- struct kvm_lapic_state *s)
-{
- vcpu_load(vcpu);
- memcpy(s->regs, vcpu->apic->regs, sizeof *s);
- vcpu_put(vcpu);
-
- return 0;
-}
-
-static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
- struct kvm_lapic_state *s)
-{
- vcpu_load(vcpu);
- memcpy(vcpu->apic->regs, s->regs, sizeof *s);
- kvm_apic_post_state_restore(vcpu);
- vcpu_put(vcpu);
-
- return 0;
-}
-
static long kvm_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
struct kvm_vcpu *vcpu = filp->private_data;
void __user *argp = (void __user *)arg;
- int r = -EINVAL;
+ int r;
switch (ioctl) {
case KVM_RUN:
r = 0;
break;
}
- case KVM_GET_MSRS:
- r = msr_io(vcpu, argp, kvm_get_msr, 1);
- break;
- case KVM_SET_MSRS:
- r = msr_io(vcpu, argp, do_set_msr, 0);
- break;
- case KVM_SET_CPUID: {
- struct kvm_cpuid __user *cpuid_arg = argp;
- struct kvm_cpuid cpuid;
-
- r = -EFAULT;
- if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
- goto out;
- r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
- if (r)
- goto out;
- break;
- }
case KVM_SET_SIGNAL_MASK: {
struct kvm_signal_mask __user *sigmask_arg = argp;
struct kvm_signal_mask kvm_sigmask;
r = 0;
break;
}
- case KVM_GET_LAPIC: {
- struct kvm_lapic_state lapic;
-
- memset(&lapic, 0, sizeof lapic);
- r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
- if (r)
- goto out;
- r = -EFAULT;
- if (copy_to_user(argp, &lapic, sizeof lapic))
- goto out;
- r = 0;
- break;
- }
- case KVM_SET_LAPIC: {
- struct kvm_lapic_state lapic;
-
- r = -EFAULT;
- if (copy_from_user(&lapic, argp, sizeof lapic))
- goto out;
- r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
- if (r)
- goto out;
- r = 0;
- break;
- }
default:
- ;
+ r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
}
out:
return r;
{
struct kvm *kvm = filp->private_data;
void __user *argp = (void __user *)arg;
- int r = -EINVAL;
+ int r;
switch (ioctl) {
case KVM_CREATE_VCPU:
if (r < 0)
goto out;
break;
- case KVM_SET_MEMORY_REGION: {
- struct kvm_memory_region kvm_mem;
+ case KVM_SET_USER_MEMORY_REGION: {
+ struct kvm_userspace_memory_region kvm_userspace_mem;
r = -EFAULT;
- if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
+ if (copy_from_user(&kvm_userspace_mem, argp,
+ sizeof kvm_userspace_mem))
goto out;
- r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
+
+ r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
if (r)
goto out;
break;
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 (!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(page);
+ return NOPAGE_SIGBUS;
+ }
if (type != NULL)
*type = VM_FAULT_MINOR;
goto out;
r = kvm_dev_ioctl_create_vm();
break;
- case KVM_GET_MSR_INDEX_LIST: {
- struct kvm_msr_list __user *user_msr_list = argp;
- struct kvm_msr_list msr_list;
- unsigned n;
-
- r = -EFAULT;
- if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
- goto out;
- n = msr_list.nmsrs;
- msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
- if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
- goto out;
- r = -E2BIG;
- if (n < num_msrs_to_save)
- goto out;
- r = -EFAULT;
- if (copy_to_user(user_msr_list->indices, &msrs_to_save,
- num_msrs_to_save * sizeof(u32)))
- goto out;
- if (copy_to_user(user_msr_list->indices
- + num_msrs_to_save * sizeof(u32),
- &emulated_msrs,
- ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
- goto out;
- r = 0;
- 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:
+ case KVM_CAP_SET_TSS_ADDR:
r = 1;
break;
default:
r = 2 * PAGE_SIZE;
break;
default:
- ;
+ return kvm_arch_dev_ioctl(filp, ioctl, arg);
}
out:
return r;
}
static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
- void *v)
+ void *v)
{
if (val == SYS_RESTART) {
/*
}
static struct sysdev_class kvm_sysdev_class = {
- set_kset_name("kvm"),
+ .name = "kvm",
.suspend = kvm_suspend,
.resume = kvm_resume,
};
.cls = &kvm_sysdev_class,
};
-hpa_t bad_page_address;
+struct page *bad_page;
static inline
struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
r = misc_register(&kvm_dev);
if (r) {
- printk (KERN_ERR "kvm: misc device register failed\n");
+ printk(KERN_ERR "kvm: misc device register failed\n");
goto out_free;
}
kvm_preempt_ops.sched_in = kvm_sched_in;
kvm_preempt_ops.sched_out = kvm_sched_out;
- return r;
+ kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
+
+ return 0;
out_free:
kmem_cache_destroy(kvm_vcpu_cache);
kvm_x86_ops = NULL;
return r;
}
+EXPORT_SYMBOL_GPL(kvm_init_x86);
void kvm_exit_x86(void)
{
kvm_x86_ops->hardware_unsetup();
kvm_x86_ops = NULL;
}
+EXPORT_SYMBOL_GPL(kvm_exit_x86);
static __init int kvm_init(void)
{
- static struct page *bad_page;
int r;
r = kvm_mmu_module_init();
kvm_init_debug();
- kvm_init_msr_list();
+ kvm_arch_init();
+
+ bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
+ if (bad_page == NULL) {
r = -ENOMEM;
goto out;
}
- bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
- memset(__va(bad_page_address), 0, PAGE_SIZE);
-
return 0;
out:
static __exit void kvm_exit(void)
{
kvm_exit_debug();
- __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
+ __free_page(bad_page);
kvm_mmu_module_exit();
}
module_init(kvm_init)
module_exit(kvm_exit)
-
-EXPORT_SYMBOL_GPL(kvm_init_x86);
-EXPORT_SYMBOL_GPL(kvm_exit_x86);
projects / deliverable / linux.git / blobdiff