From 9698e2687b226b0e8d44e79c657870f6ac10b041 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Wed, 19 Dec 2018 12:06:13 +0100 Subject: KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ Upstream commit e87555e550cef4941579cd879759a7c0dee24e68 ] AMD doesn't seem to implement MSR_IA32_MCG_EXT_CTL and svm code in kvm knows nothing about it, however, this MSR is among emulated_msrs and thus returned with KVM_GET_MSR_INDEX_LIST. The consequent KVM_GET_MSRS, of course, fails. Report the MSR as unsupported to not confuse userspace. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Radim Krčmář Signed-off-by: Sasha Levin --- arch/x86/kvm/svm.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/x86') diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 4dc79d139810..656ac12f5439 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5319,6 +5319,13 @@ static bool svm_cpu_has_accelerated_tpr(void) static bool svm_has_emulated_msr(int index) { + switch (index) { + case MSR_IA32_MCG_EXT_CTL: + return false; + default: + break; + } + return true; } -- cgit v1.2.3