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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-12-19 14:06:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 21:46:07 +0300 |
| commit | 9698e2687b226b0e8d44e79c657870f6ac10b041 (patch) | |
| tree | 0a944936d3b989a8bcf6f7cf6fe55256026f3f4f /arch/x86 | |
| parent | 391e1989424d73cde3ab8762e0fcd5ced098b569 (diff) | |
| download | linux-9698e2687b226b0e8d44e79c657870f6ac10b041.tar.xz | |
KVM: x86: svm: report MSR_IA32_MCG_EXT_CTL as unsupported
[ 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 <vkuznets@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/svm.c | 7 |
1 files changed, 7 insertions, 0 deletions
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; } |