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

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

arch/x86/kvm/x86.c

+3 −0
Original line number Diff line number Diff line
@@ -520,6 +520,9 @@ int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long 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)

		kvm_mmu_reset_context(vcpu);

	return 0;