kvm_irq_delivery_to_apic_fast
if (kvm_irq_delivery_to_apic_fast(kvm, NULL, &irq, &r))
if (!kvm_irq_delivery_to_apic_fast(apic->vcpu->kvm, apic, &irq,
bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,