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Commit 405a353a authored by Ladi Prosek's avatar Ladi Prosek Committed by Radim Krčmář
Browse files

KVM: x86: Add MSR_AMD64_DC_CFG to the list of ignored MSRs 



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: default avatarLadi Prosek <lprosek@redhat.com>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
parent 5a48a622

arch/x86/kvm/x86.c

+2 −0
Original line number Diff line number Diff line
@@ -2137,6 +2137,7 @@ 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:
@@ -2399,6 +2400,7 @@ 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: