KVM: x86: use delivery to self in hyperv synic

Interrupt to self can be sent without knowing the APIC ID.
Reviewed-by: NDavid Hildenbrand <david@redhat.com>
Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/hyperv.c

@@ -305,13 +305,13 @@ static int synic_set_irq(struct kvm_vcpu_hv_synic *synic, u32 sint)
 		return -ENOENT;
 
 	memset(&irq, 0, sizeof(irq));
-	irq.dest_id = kvm_apic_id(vcpu->arch.apic);
+	irq.shorthand = APIC_DEST_SELF;
 	irq.dest_mode = APIC_DEST_PHYSICAL;
 	irq.delivery_mode = APIC_DM_FIXED;
 	irq.vector = vector;
 	irq.level = 1;
 
-	ret = kvm_irq_delivery_to_apic(vcpu->kvm, NULL, &irq, NULL);
+	ret = kvm_irq_delivery_to_apic(vcpu->kvm, vcpu->arch.apic, &irq, NULL);
 	trace_kvm_hv_synic_set_irq(vcpu->vcpu_id, sint, irq.vector, ret);
 	return ret;
 }