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KVM: x86: Simplify __apic_accept_irq

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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 <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Jan Kiszka 2013-07-25 09:58:45 +02:00 committed by Gleb Natapov
parent 103af0a987
commit 11f5cc0515
1 changed files with 8 additions and 15 deletions
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23
arch/x86/kvm/lapic.c
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@ -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: