From: Joerg Roedel <joerg.roedel@amd.com>
Date: Tue, 25 Nov 2008 19:17:09 +0000 (+0100)
Subject: KVM: SVM: Allow read access to MSR_VM_VR
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=eb6f302edff9da963e687bf6c15dcf88843b1c3b;p=linux-beck.git

KVM: SVM: Allow read access to MSR_VM_VR

KVM tries to read the VM_CR MSR to find out if SVM was disabled by
the BIOS. So implement read support for this MSR to make nested
SVM running.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 4cb2920b1527..df5b41192661 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1869,6 +1869,9 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
 	case MSR_VM_HSAVE_PA:
 		*data = svm->hsave_msr;
 		break;
+	case MSR_VM_CR:
+		*data = 0;
+		break;
 	default:
 		return kvm_get_msr_common(vcpu, ecx, data);
 	}