commit 3298b75c880d6f0fd70750233c0f3e71a72a5bfb
author Gleb Natapov <gleb@redhat.com> Mon May 11 13:35:46 2009 +0300
committer Avi Kivity <avi@redhat.com> Wed Jun 10 11:48:57 2009 +0300
tree 8472e1747ac49a43d13e8c4c232415d107c6f3bc
parent 51e4d5ab28c75d819b3840da11559ad5c1429135

KVM: Unprotect a page if #PF happens during NMI injection.

It is done for exception and interrupt already.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kvm/svm.c

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8b5ffbd..ac3d5ba 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1122,8 +1122,7 @@
 	if (npt_enabled)
 		svm_flush_tlb(&svm->vcpu);
 	else {
-		if (svm->vcpu.arch.interrupt.pending ||
-				svm->vcpu.arch.exception.pending)
+		if (kvm_event_needs_reinjection(&svm->vcpu))
 			kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
 	}
 	return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);

arch/x86/kvm/vmx.c

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index f3ab27b..8981654 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2615,7 +2615,7 @@
 		cr2 = vmcs_readl(EXIT_QUALIFICATION);
 		KVMTRACE_3D(PAGE_FAULT, vcpu, error_code, (u32)cr2,
 			    (u32)((u64)cr2 >> 32), handler);
-		if (vcpu->arch.interrupt.pending || vcpu->arch.exception.pending)
+		if (kvm_event_needs_reinjection(vcpu))
 			kvm_mmu_unprotect_page_virt(vcpu, cr2);
 		return kvm_mmu_page_fault(vcpu, cr2, error_code);
 	}

arch/x86/kvm/x86.h

diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 39350b2..21203d4 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -30,4 +30,10 @@
 		clear_bit(word_index, &vcpu->arch.irq_summary);
 	return irq;
 }
+
+static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.exception.pending || vcpu->arch.interrupt.pending ||
+		vcpu->arch.nmi_injected;
+}
 #endif