KVM: x86: Drop superfluous kvm_hv_set_sint() => kvm_hv_synic_set_irq() wrapper

Drop the superfluous kvm_hv_set_sint() and instead wire up ->set() directly
to its final destination, kvm_hv_synic_set_irq().  Keep hv_synic_set_irq()
instead of kvm_hv_set_sint() to provide some amount of consistency in the
->set() helpers, e.g. to match kvm_pic_set_irq() and kvm_ioapic_set_irq().

kvm_set_msi() is arguably the oddball, e.g. kvm_set_msi_irq() should be
something like kvm_msi_to_lapic_irq() so that kvm_set_msi() can instead be
kvm_set_msi_irq(), but that's a future problem to solve.

No functional change intended.

Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Kai Huang <kai.huang@intel.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20250611213557.294358-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: sean-jc

arch/x86/kvm/hyperv.c

@@ -497,15 +497,19 @@ static int synic_set_irq(struct kvm_vcpu_hv_synic *synic, u32 sint)
 	return ret;
 }
 
-int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vpidx, u32 sint)
+int kvm_hv_synic_set_irq(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
+			 int irq_source_id, int level, bool line_status)
 {
 	struct kvm_vcpu_hv_synic *synic;
 
-	synic = synic_get(kvm, vpidx);
+	if (!level)
+		return -1;
+
+	synic = synic_get(kvm, e->hv_sint.vcpu);
 	if (!synic)
 		return -EINVAL;
 
-	return synic_set_irq(synic, sint);
+	return synic_set_irq(synic, e->hv_sint.sint);
 }
 
 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector)

arch/x86/kvm/hyperv.h

@@ -103,7 +103,8 @@ static inline bool kvm_hv_hypercall_enabled(struct kvm_vcpu *vcpu)
 int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
 
 void kvm_hv_irq_routing_update(struct kvm *kvm);
-int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint);
+int kvm_hv_synic_set_irq(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
+			 int irq_source_id, int level, bool line_status);
 void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector);
 int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages);
 

arch/x86/kvm/irq_comm.c

@@ -127,18 +127,6 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
 	return kvm_irq_delivery_to_apic(kvm, NULL, &irq, NULL);
 }
 
-#ifdef CONFIG_KVM_HYPERV
-static int kvm_hv_set_sint(struct kvm_kernel_irq_routing_entry *e,
-		    struct kvm *kvm, int irq_source_id, int level,
-		    bool line_status)
-{
-	if (!level)
-		return -1;
-
-	return kvm_hv_synic_set_irq(kvm, e->hv_sint.vcpu, e->hv_sint.sint);
-}
-#endif
-
 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
 			      struct kvm *kvm, int irq_source_id, int level,
 			      bool line_status)
@@ -149,8 +137,8 @@ int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *e,
 	switch (e->type) {
 #ifdef CONFIG_KVM_HYPERV
 	case KVM_IRQ_ROUTING_HV_SINT:
-		return kvm_hv_set_sint(e, kvm, irq_source_id, level,
-				       line_status);
+		return kvm_hv_synic_set_irq(e, kvm, irq_source_id, level,
+					    line_status);
 #endif
 
 	case KVM_IRQ_ROUTING_MSI:
@@ -302,7 +290,7 @@ int kvm_set_routing_entry(struct kvm *kvm,
 		break;
 #ifdef CONFIG_KVM_HYPERV
 	case KVM_IRQ_ROUTING_HV_SINT:
-		e->set = kvm_hv_set_sint;
+		e->set = kvm_hv_synic_set_irq;
 		e->hv_sint.vcpu = ue->u.hv_sint.vcpu;
 		e->hv_sint.sint = ue->u.hv_sint.sint;
 		break;