From e5f3f027960128035a5fa176877b5e9160b35397 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Fri, 12 Nov 2010 14:47:01 +0800 Subject: [PATCH] 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: Xiao Guangrong Signed-off-by: Avi Kivity --- arch/x86/kvm/x86.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b7ee61d5bc81..9b875ff05410 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -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; -- GitLab