KVM: SVM: Fold avic_set_pi_irte_mode() into its sole caller

Fold avic_set_pi_irte_mode() into avic_refresh_apicv_exec_ctrl() in
anticipation of moving the __avic_vcpu_{load,put}() calls into the
critical section, and because having a one-off helper with a name that's
easily confused with avic_pi_update_irte() is unnecessary.

No functional change intended.

Tested-by: Sairaj Kodilkar <sarunkod@amd.com>
Link: https://lore.kernel.org/r/20250611224604.313496-59-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: sean-jc

arch/x86/kvm/svm/avic.c

@@ -729,34 +729,6 @@ void avic_apicv_post_state_restore(struct kvm_vcpu *vcpu)
 	avic_handle_ldr_update(vcpu);
 }
 
-static void avic_set_pi_irte_mode(struct kvm_vcpu *vcpu, bool activate)
-{
-	int apic_id = kvm_cpu_get_apicid(vcpu->cpu);
-	unsigned long flags;
-	struct vcpu_svm *svm = to_svm(vcpu);
-	struct kvm_kernel_irqfd *irqfd;
-
-	/*
-	 * Here, we go through the per-vcpu ir_list to update all existing
-	 * interrupt remapping table entry targeting this vcpu.
-	 */
-	spin_lock_irqsave(&svm->ir_list_lock, flags);
-
-	if (list_empty(&svm->ir_list))
-		goto out;
-
-	list_for_each_entry(irqfd, &svm->ir_list, vcpu_list) {
-		void *data = irqfd->irq_bypass_data;
-
-		if (activate)
-			WARN_ON_ONCE(amd_iommu_activate_guest_mode(data, apic_id));
-		else
-			WARN_ON_ONCE(amd_iommu_deactivate_guest_mode(data));
-	}
-out:
-	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
-}
-
 static void svm_ir_list_del(struct kvm_kernel_irqfd *irqfd)
 {
 	struct kvm_vcpu *vcpu = irqfd->irq_bypass_vcpu;
@@ -991,6 +963,10 @@ void avic_refresh_virtual_apic_mode(struct kvm_vcpu *vcpu)
 void avic_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
 {
 	bool activated = kvm_vcpu_apicv_active(vcpu);
+	int apic_id = kvm_cpu_get_apicid(vcpu->cpu);
+	struct vcpu_svm *svm = to_svm(vcpu);
+	struct kvm_kernel_irqfd *irqfd;
+	unsigned long flags;
 
 	if (!enable_apicv)
 		return;
@@ -1002,7 +978,25 @@ void avic_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
 	else
 		avic_vcpu_put(vcpu);
 
-	avic_set_pi_irte_mode(vcpu, activated);
+	/*
+	 * Here, we go through the per-vcpu ir_list to update all existing
+	 * interrupt remapping table entry targeting this vcpu.
+	 */
+	spin_lock_irqsave(&svm->ir_list_lock, flags);
+
+	if (list_empty(&svm->ir_list))
+		goto out;
+
+	list_for_each_entry(irqfd, &svm->ir_list, vcpu_list) {
+		void *data = irqfd->irq_bypass_data;
+
+		if (activated)
+			WARN_ON_ONCE(amd_iommu_activate_guest_mode(data, apic_id));
+		else
+			WARN_ON_ONCE(amd_iommu_deactivate_guest_mode(data));
+	}
+out:
+	spin_unlock_irqrestore(&svm->ir_list_lock, flags);
 }
 
 void avic_vcpu_blocking(struct kvm_vcpu *vcpu)