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| author |   Maxim Levitsky <mlevitsk@redhat.com> | 2022-02-23 13:56:49 +0200 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-02-24 13:04:47 -0500 |
| commit | e910a53fb4f20aa012e46371ffb4c32c8da259b4 (patch) | |
| tree | 4ff0d732247af754aa78461f9206dd3afd157943 /lib/test_overflow.c | |
| parent | KVM: x86/mmu: make apf token non-zero to fix bug (diff) | |
| download | wireguard-linux-e910a53fb4f20aa012e46371ffb4c32c8da259b4.tar.xz wireguard-linux-e910a53fb4f20aa012e46371ffb4c32c8da259b4.zip | |
KVM: x86: nSVM: disallow userspace setting of MSR_AMD64_TSC_RATIO to non default value when tsc scaling disabled
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>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions