From: Avi Kivity Subject: [PATCH 36/47] KVM: ignore reads from AMDs C1E enabled MSR Date: Wed, 19 Aug 2009 16:02:32 +0300 Message-ID: <1250686963-8357-37-git-send-email-avi@redhat.com> References: <1250686963-8357-1-git-send-email-avi@redhat.com> Cc: linux-kernel@vger.kernel.org To: kvm@vger.kernel.org Return-path: In-Reply-To: <1250686963-8357-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org From: Andre Przywara If the Linux kernel detects an C1E capable AMD processor (K8 RevF and higher), it will access a certain MSR on every attempt to go to halt. Explicitly handle this read and return 0 to let KVM run a Linux guest with the native AMD host CPU propagated to the guest. Signed-off-by: Andre Przywara Signed-off-by: Avi Kivity --- arch/x86/kvm/x86.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index cae5b12..6aace61 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1038,6 +1038,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case MSR_P6_EVNTSEL0: case MSR_P6_EVNTSEL1: case MSR_K7_EVNTSEL0: + case MSR_K8_INT_PENDING_MSG: data = 0; break; case MSR_MTRRcap: -- 1.6.3.3