On Wed, Sep 28, 2022 at 07:16:03PM +0800, Chao Gao wrote: >@@ -10538,6 +10547,17 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) > > vcpu->mode = OUTSIDE_GUEST_MODE; > smp_wmb(); >+ /* >+ * Suppress notification when CPU is OUTSIDE_GUEST_MODE to avoid >+ * wasting time on handling interrupts. A notification to host/kvm >+ * just indicates some interrupts are posted for a vCPU. Since KVM >+ * always syncs pending interrupts in PIR to vAPIC IRR before guest >+ * entry (in ->sync_pir_to_irr()), notification isn't needed. >+ * >+ * Do this even if apicv is disabled for simplicity. >+ */ >+ if (kvm_lapic_enabled(vcpu)) >+ static_call_cond(kvm_x86_pi_suppress_notification)(vcpu, true); I missed the other kvm's setting vcpu->mode to OUTSIDE_GUEST_MODE in this function (a few lines above). Will fix it in v4. > > /* > * Sync xfd before calling handle_exit_irqoff() which may > >base-commit: 372d07084593dc7a399bf9bee815711b1fb1bcf2 >-- >2.25.1 >
