diff options
| author | Wanpeng Li <wanpengli@tencent.com> | 2018-03-12 04:53:04 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-03-16 22:03:53 +0100 |
| commit | b31c114b82b2b55913d2cf744e6a665c2ca090ac (patch) | |
| tree | 56aabff42789a37caea34841c397c5caf066bd34 /arch/x86/kvm/x86.h | |
| parent | caa057a2cad647fb368a12c8e6c410ac4c28e063 (diff) | |
KVM: X86: Provide a capability to disable PAUSE intercepts
Allow to disable pause loop exit/pause filtering on a per VM basis.
If some VMs have dedicated host CPUs, they won't be negatively affected
due to needlessly intercepted PAUSE instructions.
Thanks to Jan H. Schönherr's initial patch.
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 'arch/x86/kvm/x86.h')
| -rw-r--r-- | arch/x86/kvm/x86.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 6d14589c1a91..b620cfa8e8d5 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -266,8 +266,10 @@ static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) #define KVM_X86_DISABLE_EXITS_MWAIT (1 << 0) #define KVM_X86_DISABLE_EXITS_HTL (1 << 1) +#define KVM_X86_DISABLE_EXITS_PAUSE (1 << 2) #define KVM_X86_DISABLE_VALID_EXITS (KVM_X86_DISABLE_EXITS_MWAIT | \ - KVM_X86_DISABLE_EXITS_HTL) + KVM_X86_DISABLE_EXITS_HTL | \ + KVM_X86_DISABLE_EXITS_PAUSE) static inline bool kvm_mwait_in_guest(struct kvm *kvm) { @@ -279,4 +281,9 @@ static inline bool kvm_hlt_in_guest(struct kvm *kvm) return kvm->arch.hlt_in_guest; } +static inline bool kvm_pause_in_guest(struct kvm *kvm) +{ + return kvm->arch.pause_in_guest; +} + #endif |