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Commit 5a71785d authored by Yang Zhang's avatar Yang Zhang Committed by Marcelo Tosatti
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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: default avatarYang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent a20ed54d

arch/x86/kvm/lapic.c

+19 −11
Original line number Diff line number Diff line
@@ -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);



		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);

		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;

					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:

arch/x86/kvm/vmx.c

+1 −1
Original line number Diff line number Diff line
@@ -84,7 +84,7 @@ module_param(vmm_exclusive, bool, S_IRUGO); 
static bool __read_mostly fasteoi = 1;

module_param(fasteoi, bool, S_IRUGO);



static bool __read_mostly enable_apicv;

static bool __read_mostly enable_apicv = 1;

module_param(enable_apicv, bool, S_IRUGO);



/*

arch/x86/kvm/x86.c

+1 −0
Original line number Diff line number Diff line
@@ -2692,6 +2692,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 
static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,

				    struct kvm_lapic_state *s)

{

	kvm_x86_ops->sync_pir_to_irr(vcpu);

	memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s);



	return 0;