• Wanpeng Li's avatar
    KVM: X86: Provide a capability to disable MWAIT intercepts · 4d5422ce
    Wanpeng Li authored
    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: default avatarWanpeng Li <wanpengli@tencent.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    4d5422ce
kvm_host.h 42.4 KB