From f082d564d99bd33b95fc2f51170bfb49d2e29744 Mon Sep 17 00:00:00 2001 From: Ladi Prosek Date: Thu, 6 Apr 2017 15:22:20 +0200 Subject: [PATCH] KVM: x86: Add MSR_AMD64_DC_CFG to the list of ignored MSRs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 405a353a0e20d09090ad96147da6afad9b0ce056 upstream. 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 Signed-off-by: Radim Krčmář Signed-off-by: Ben Hutchings --- 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 c02adabf6138..d47c468efc19 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2085,6 +2085,7 @@ 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: @@ -2462,6 +2463,7 @@ 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_P6_PERFCTR0: