KVM: VMX: Pass desired vector instead of bool for triggering posted IRQ

Refactor the posted interrupt helper to take the desired notification
vector instead of a bool so that the callers are self-documenting.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20211208015236.1616697-19-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Author: sean-jc

arch/x86/kvm/vmx/vmx.c

@@ -3932,11 +3932,9 @@ static void vmx_msr_filter_changed(struct kvm_vcpu *vcpu)
 }
 
 static inline bool kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu,
-						     bool nested)
+						     int pi_vec)
 {
 #ifdef CONFIG_SMP
-	int pi_vec = nested ? POSTED_INTR_NESTED_VECTOR : POSTED_INTR_VECTOR;
-
 	if (vcpu->mode == IN_GUEST_MODE) {
 		/*
 		 * The vector of interrupt to be delivered to vcpu had
@@ -3997,7 +3995,7 @@ static int vmx_deliver_nested_posted_interrupt(struct kvm_vcpu *vcpu,
 		smp_mb__after_atomic();
 
 		/* the PIR and ON have been set by L1. */
-		if (!kvm_vcpu_trigger_posted_interrupt(vcpu, true))
+		if (!kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_NESTED_VECTOR))
 			kvm_vcpu_wake_up(vcpu);
 		return 0;
 	}
@@ -4035,7 +4033,7 @@ static int vmx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector)
 	 * guaranteed to see PID.ON=1 and sync the PIR to IRR if triggering a
 	 * posted interrupt "fails" because vcpu->mode != IN_GUEST_MODE.
 	 */
-	if (!kvm_vcpu_trigger_posted_interrupt(vcpu, false))
+	if (!kvm_vcpu_trigger_posted_interrupt(vcpu, POSTED_INTR_VECTOR))
 		kvm_vcpu_wake_up(vcpu);
 
 	return 0;