KVM: VMX: Use posted interrupt to deliver virtual interrupt
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>
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index dbf74c9..e29883c 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -353,6 +353,7 @@
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 @@
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: