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/svm.c | |
| 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/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 0f801d82f493..9729b7e59cc9 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1460,7 +1460,8 @@ static void init_vmcb(struct vcpu_svm *svm) svm->nested.vmcb = 0; svm->vcpu.arch.hflags = 0; - if (boot_cpu_has(X86_FEATURE_PAUSEFILTER)) { + if (boot_cpu_has(X86_FEATURE_PAUSEFILTER) && + !kvm_pause_in_guest(svm->vcpu.kvm)) { control->pause_filter_count = 3000; set_intercept(svm, INTERCEPT_PAUSE); } |