KVM: x86: nSVM: disallow userspace setting of MSR_AMD64_TSC_RATIO to non...
KVM: x86: nSVM: disallow userspace setting of MSR_AMD64_TSC_RATIO to non default value when tsc scaling disabled commit e910a53f upstream. 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: 5228eb96 ("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> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
62040f5c
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