diff options
| author | Eduardo Habkost <ehabkost@redhat.com> | 2018-12-17 22:34:18 -0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-12-18 22:15:44 +0100 |
| commit | 0e1b869fff60c81b510c2d00602d778f8f59dd9a (patch) | |
| tree | 60368e72c7054beb43b0bf402a4169cad7b10f3a /arch/x86/kvm/x86.c | |
| parent | dcbd3e49c2f0b2c2d8a321507ff8f3de4af76d7c (diff) | |
kvm: x86: Add AMD's EX_CFG to the list of ignored MSRs
Some guests OSes (including Windows 10) write to MSR 0xc001102c
on some cases (possibly while trying to apply a CPU errata).
Make KVM ignore reads and writes to that MSR, so the guest won't
crash.
The MSR is documented as "Execution Unit Configuration (EX_CFG)",
at AMD's "BIOS and Kernel Developer's Guide (BKDG) for AMD Family
15h Models 00h-0Fh Processors".
Cc: stable@vger.kernel.org
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 477563e7ccbd..f049ecfac7bb 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2426,6 +2426,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_AMD64_PATCH_LOADER: case MSR_AMD64_BU_CFG2: case MSR_AMD64_DC_CFG: + case MSR_F15H_EX_CFG: break; case MSR_IA32_UCODE_REV: @@ -2721,6 +2722,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_AMD64_BU_CFG2: case MSR_IA32_PERF_CTL: case MSR_AMD64_DC_CFG: + case MSR_F15H_EX_CFG: msr_info->data = 0; break; case MSR_F15H_PERF_CTL0 ... MSR_F15H_PERF_CTR5: |