From: Sean Christopherson <seanjc@xxxxxxxxxx> Skip PAUSE after interception to avoid unnecessarily re-executing the instruction in the guest, e.g. after regaining control post-yield. This is a benign bug as KVM disables PAUSE interception if filtering is off, including the case where pause_filter_count is set to zero. Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> Message-Id: <20210205005750.3841462-10-seanjc@xxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> --- arch/x86/kvm/svm/svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 3725a4636930..1c62d3ec7e53 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -2982,7 +2982,7 @@ static int pause_interception(struct kvm_vcpu *vcpu) grow_ple_window(vcpu); kvm_vcpu_on_spin(vcpu, in_kernel); - return 1; + return kvm_skip_emulated_instruction(vcpu); } static int invpcid_interception(struct kvm_vcpu *vcpu) -- 2.26.2
