KVM: x86: prevent MWAIT in guest with buggy MONITOR
The bug prevents MWAIT from waking up after a write to the monitored cache line. KVM might emulate a CPU model that shouldn't have the bug, so the guest would not employ a workaround and possibly miss wakeups. Better to avoid the situation. Reviewed-by: NAlexander Graf <agraf@suse.de> Acked-by: NBorislav Petkov <bp@suse.de> Acked-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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