From 11f5cc051503e54cf786bdbaf0e4ff9cad01df1e Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Thu, 25 Jul 2013 09:58:45 +0200 Subject: [PATCH] KVM: x86: Simplify __apic_accept_irq If posted interrupts are enabled, we can no longer track if an IRQ was coalesced based on IRR. So drop this logic also from the classic software path and simplify apic_test_and_set_irr to apic_set_irr. Signed-off-by: Jan Kiszka Signed-off-by: Gleb Natapov --- arch/x86/kvm/lapic.c | 23 ++++++++--------------- 1 file changed, 8 insertions(+), 15 deletions(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index afc11245827c..9dc3650ac0a3 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -331,10 +331,10 @@ void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir) } EXPORT_SYMBOL_GPL(kvm_apic_update_irr); -static inline int apic_test_and_set_irr(int vec, struct kvm_lapic *apic) +static inline void apic_set_irr(int vec, struct kvm_lapic *apic) { apic->irr_pending = true; - return apic_test_and_set_vector(vec, apic->regs + APIC_IRR); + apic_set_vector(vec, apic->regs + APIC_IRR); } static inline int apic_search_irr(struct kvm_lapic *apic) @@ -681,28 +681,21 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, if (unlikely(!apic_enabled(apic))) break; + result = 1; + if (dest_map) __set_bit(vcpu->vcpu_id, dest_map); - if (kvm_x86_ops->deliver_posted_interrupt) { - result = 1; + if (kvm_x86_ops->deliver_posted_interrupt) kvm_x86_ops->deliver_posted_interrupt(vcpu, vector); - } else { - result = !apic_test_and_set_irr(vector, apic); - - if (!result) { - if (trig_mode) - apic_debug("level trig mode repeatedly " - "for vector %d", vector); - goto out; - } + else { + apic_set_irr(vector, apic); kvm_make_request(KVM_REQ_EVENT, vcpu); kvm_vcpu_kick(vcpu); } -out: trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode, - trig_mode, vector, !result); + trig_mode, vector, false); break; case APIC_DM_REMRD: -- 2.20.1