From 76dfafd536730ef9b9d99b1cf596916d52be76d1 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Mon, 19 Dec 2016 17:17:11 +0100 Subject: KVM: x86: do not scan IRR twice on APICv vmentry Calls to apic_find_highest_irr are scanning IRR twice, once in vmx_sync_pir_from_irr and once in apic_search_irr. Change sync_pir_from_irr to get the new maximum IRR from kvm_apic_update_irr; now that it does the computation, it can also do the RVI write. In order to avoid complications in svm.c, make the callback optional. Signed-off-by: Paolo Bonzini --- arch/x86/kvm/x86.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'arch/x86/kvm/x86.c') diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 8f80da161e80..75b0f30d75ee 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2909,7 +2909,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s) { - if (vcpu->arch.apicv_active) + if (kvm_x86_ops->sync_pir_to_irr && vcpu->arch.apicv_active) kvm_x86_ops->sync_pir_to_irr(vcpu); return kvm_apic_get_state(vcpu, s); @@ -6659,7 +6659,7 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) if (irqchip_split(vcpu->kvm)) kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors); else { - if (vcpu->arch.apicv_active) + if (kvm_x86_ops->sync_pir_to_irr && vcpu->arch.apicv_active) kvm_x86_ops->sync_pir_to_irr(vcpu); kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors); } @@ -6822,11 +6822,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) * Update architecture specific hints for APIC * virtual interrupt delivery. */ - if (vcpu->arch.apicv_active) { + if (kvm_x86_ops->sync_pir_to_irr && vcpu->arch.apicv_active) kvm_x86_ops->sync_pir_to_irr(vcpu); - kvm_x86_ops->hwapic_irr_update(vcpu, - kvm_lapic_find_highest_irr(vcpu)); - } } if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { -- cgit v1.2.3