KVM: MMU: nuke shadowed pgtable pages and ptes on memslot destruction

Flush the shadow mmu before removing regions to avoid stale entries.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Marcelo Tosatti 2008-07-10 20:49:31 -03:00 committed by Avi Kivity
parent d6e88aec07
commit 34d4cb8fca
6 changed files with 20 additions and 0 deletions

View file

@ -1455,6 +1455,9 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
return 0;
}
void kvm_arch_flush_shadow(struct kvm *kvm)
{
}
long kvm_arch_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)

View file

@ -170,6 +170,10 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
return 0;
}
void kvm_arch_flush_shadow(struct kvm *kvm)
{
}
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
struct kvm_vcpu *vcpu;

View file

@ -675,6 +675,10 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
return 0;
}
void kvm_arch_flush_shadow(struct kvm *kvm)
{
}
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
return gfn;

View file

@ -4032,6 +4032,11 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
return 0;
}
void kvm_arch_flush_shadow(struct kvm *kvm)
{
kvm_mmu_zap_all(kvm);
}
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE

View file

@ -168,6 +168,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,
struct kvm_memory_slot old,
int user_alloc);
void kvm_arch_flush_shadow(struct kvm *kvm);
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn);
struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);

View file

@ -405,6 +405,9 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (mem->slot >= kvm->nmemslots)
kvm->nmemslots = mem->slot + 1;
if (!npages)
kvm_arch_flush_shadow(kvm);
*memslot = new;
r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);