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KVM: VMX: Use posted interrupt to deliver virtual interrupt

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If posted interrupt is avaliable, then uses it to inject virtual
interrupt to guest.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Yang Zhang
2013-04-11 19:25:16 +08:00
committed by Marcelo Tosatti
parent a20ed54d6e
commit 5a71785dde
3 changed files with 21 additions and 12 deletions
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30
arch/x86/kvm/lapic.c
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@@ -353,6 +353,7 @@ static inline int apic_find_highest_irr(struct kvm_lapic *apic)
if (!apic->irr_pending)
return -1;
kvm_x86_ops->sync_pir_to_irr(apic->vcpu);
result = apic_search_irr(apic);
ASSERT(result == -1 || result >= 16);
@@ -683,18 +684,25 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
if (dest_map)
__set_bit(vcpu->vcpu_id, dest_map);
result = !apic_test_and_set_irr(vector, apic);
trace_kvm_apic_accept_irq(vcpu->vcpu_id, delivery_mode,
trig_mode, vector, !result);
if (!result) {
if (trig_mode)
apic_debug("level trig mode repeatedly for "
"vector %d", vector);
break;
}
if (kvm_x86_ops->deliver_posted_interrupt) {
result = 1;
kvm_x86_ops->deliver_posted_interrupt(vcpu, vector);
} else {
result = !apic_test_and_set_irr(vector, apic);
kvm_make_request(KVM_REQ_EVENT, vcpu);
kvm_vcpu_kick(vcpu);
if (!result) {
if (trig_mode)
apic_debug("level trig mode repeatedly "
"for vector %d", vector);
goto out;
}
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);
break;
case APIC_DM_REMRD: