diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-12-19 12:06:13 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:47:16 +0100 |
| commit | 84a4572bf2779118b5586a442c5efad9726d92c3 (patch) | |
| tree | ae04759a2bccfc37e0eae73458dd97c2f85746de /arch | |
| parent | a41cd69e4408db958b88fc9aca970d36cdeed3ad (diff) | |
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')
| -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 f1d3fe5a0c65..02ac8fa0cd6d 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5837,6 +5837,13 @@ 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; } |