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| author | Wanpeng Li <wanpengli@tencent.com> | 2018-03-12 04:53:02 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-03-16 22:03:51 +0100 |
| commit | 4d5422cea3b61f158d58924cbb43feada456ba5c (patch) | |
| tree | 0657ac655c54892dd6498d8e20b89380255d592a /tools | |
| parent | 4956aa3b8b59e336b77f1df0ac7ce1a94c0265f2 (diff) | |
| download | linux-4d5422cea3b61f158d58924cbb43feada456ba5c.tar.gz linux-4d5422cea3b61f158d58924cbb43feada456ba5c.tar.bz2 linux-4d5422cea3b61f158d58924cbb43feada456ba5c.zip | |
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>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/include/uapi/linux/kvm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h index 0fb5ef939732..b13c257261af 100644 --- a/tools/include/uapi/linux/kvm.h +++ b/tools/include/uapi/linux/kvm.h @@ -924,7 +924,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_S390_GS 140 #define KVM_CAP_S390_AIS 141 #define KVM_CAP_SPAPR_TCE_VFIO 142 -#define KVM_CAP_X86_GUEST_MWAIT 143 +#define KVM_CAP_X86_DISABLE_EXITS 143 #define KVM_CAP_ARM_USER_IRQ 144 #define KVM_CAP_S390_CMMA_MIGRATION 145 #define KVM_CAP_PPC_FWNMI 146 |