From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ladi Prosek Subject: [PATCH] KVM: x86: Add MSR_AMD64_DC_CFG to the list of ignored MSRs Date: Thu, 6 Apr 2017 15:22:20 +0200 Message-ID: <20170406132220.17178-1-lprosek@redhat.com> Cc: joro@8bytes.org To: kvm@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:35008 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753213AbdDFNWY (ORCPT ); Thu, 6 Apr 2017 09:22:24 -0400 Sender: kvm-owner@vger.kernel.org List-ID: Hyper-V writes 0x800000000000 to MSR_AMD64_DC_CFG when running on AMD CPUs as recommended in erratum 383, analogous to our svm_init_erratum_383. By ignoring the MSR, this patch enables running Hyper-V in L1 on AMD. Signed-off-by: Ladi Prosek --- arch/x86/kvm/x86.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ccbd45e..44814b5 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2155,6 +2155,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_VM_HSAVE_PA: case MSR_AMD64_PATCH_LOADER: case MSR_AMD64_BU_CFG2: + case MSR_AMD64_DC_CFG: break; case MSR_EFER: @@ -2417,6 +2418,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_FAM10H_MMIO_CONF_BASE: case MSR_AMD64_BU_CFG2: case MSR_IA32_PERF_CTL: + case MSR_AMD64_DC_CFG: msr_info->data = 0; break; case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3: -- 2.9.3