tree 0657ac655c54892dd6498d8e20b89380255d592a
parent 4956aa3b8b59e336b77f1df0ac7ce1a94c0265f2
author Wanpeng Li <wanpengli@tencent.com> 1520855582 -0700
committer Paolo Bonzini <pbonzini@redhat.com> 1521234231 +0100

KVM: X86: Provide a capability to disable MWAIT intercepts

Allowing a guest to execute MWAIT without interception enables a guest
to put a (physical) CPU into a power saving state, where it takes
longer to return from than what may be desired by the host.

Don't give a guest that power over a host by default. (Especially,
since nothing prevents a guest from using MWAIT even when it is not
advertised via CPUID.)

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jan H. Schönherr <jschoenh@amazon.de>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>