From 6394b6494c0a352a2db3ea3e891ba7aeea7c1441 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 9 Apr 2008 14:15:29 +0200 Subject: [PATCH] KVM: SVM: align shadow CR4.MCE with host This patch aligns the host version of the CR4.MCE bit with the CR4 active in the guest. This is necessary to get MCE exceptions when the guest is running. Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity --- arch/x86/kvm/svm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d7439ceb2ac..8af463b9152 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -878,9 +878,12 @@ set: static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) { + unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE; + vcpu->arch.cr4 = cr4; if (!npt_enabled) cr4 |= X86_CR4_PAE; + cr4 |= host_cr4_mce; to_svm(vcpu)->vmcb->save.cr4 = cr4; } -- 2.41.1