https://github.com/torvalds/linux
Revision e910a53fb4f20aa012e46371ffb4c32c8da259b4 authored by Maxim Levitsky on 23 February 2022, 11:56:49 UTC, committed by Paolo Bonzini on 24 February 2022, 18:04:47 UTC
If nested tsc scaling is disabled, MSR_AMD64_TSC_RATIO should
never have non default value.

Due to way nested tsc scaling support was implmented in qemu,
it would set this msr to 0 when nested tsc scaling was disabled.
Ignore that value for now, as it causes no harm.

Fixes: 5228eb96a487 ("KVM: x86: nSVM: implement nested TSC scaling")
Cc: stable@vger.kernel.org

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20220223115649.319134-1-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 6f3c1fc
History
Tip revision: e910a53fb4f20aa012e46371ffb4c32c8da259b4 authored by Maxim Levitsky on 23 February 2022, 11:56:49 UTC
KVM: x86: nSVM: disallow userspace setting of MSR_AMD64_TSC_RATIO to non default value when tsc scaling disabled
Tip revision: e910a53
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