Commit e5f3f027 authored by Xiao Guangrong's avatar Xiao Guangrong Committed by Avi Kivity

KVM: MMU: clear apfs if page state is changed

If CR0.PG is changed, the page fault cann't be avoid when the prefault address
is accessed later

And it also fix a bug: it can retry a page enabled #PF in page disabled context
if mmu is shadow page

This idear is from Gleb Natapov
Signed-off-by: default avatarXiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 5054c0de
...@@ -520,6 +520,9 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) ...@@ -520,6 +520,9 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
kvm_x86_ops->set_cr0(vcpu, cr0); kvm_x86_ops->set_cr0(vcpu, cr0);
if ((cr0 ^ old_cr0) & X86_CR0_PG)
kvm_clear_async_pf_completion_queue(vcpu);
if ((cr0 ^ old_cr0) & update_bits) if ((cr0 ^ old_cr0) & update_bits)
kvm_mmu_reset_context(vcpu); kvm_mmu_reset_context(vcpu);
return 0; return 0;
......
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