KVM: arm64: vgic: move irq->get_input_level into an ops structure

We already have the option to attach a callback to an interrupt
to retrieve its pending state. As we are planning to expand this
facility, move this callback into its own data structure.

This will limit the size of individual interrupts as the ops
structures can be shared across multiple interrupts.

Signed-off-by: Marc Zyngier <maz@kernel.org>

1 files changed, 17 insertions, 11 deletions

diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index e45b26e8d479..e5f06df000f2 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -92,6 +92,21 @@ enum vgic_irq_config {
 	VGIC_CONFIG_LEVEL
 };
 
+/*
+ * Per-irq ops overriding some common behavious.
+ *
+ * Always called in non-preemptible section and the functions can use
+ * kvm_arm_get_running_vcpu() to get the vcpu pointer for private IRQs.
+ */
+struct irq_ops {
+	/*
+	 * Callback function pointer to in-kernel devices that can tell us the
+	 * state of the input level of mapped level-triggered IRQ faster than
+	 * peaking into the physical GIC.
+	 */
+	bool (*get_input_level)(int vintid);
+};
+
 struct vgic_irq {
 	raw_spinlock_t irq_lock;	/* Protects the content of the struct */
 	struct list_head lpi_list;	/* Used to link all LPIs together */
@@ -129,16 +144,7 @@ struct vgic_irq {
 	u8 group;			/* 0 == group 0, 1 == group 1 */
 	enum vgic_irq_config config;	/* Level or edge */
 
-	/*
-	 * Callback function pointer to in-kernel devices that can tell us the
-	 * state of the input level of mapped level-triggered IRQ faster than
-	 * peaking into the physical GIC.
-	 *
-	 * Always called in non-preemptible section and the functions can use
-	 * kvm_arm_get_running_vcpu() to get the vcpu pointer for private
-	 * IRQs.
-	 */
-	bool (*get_input_level)(int vintid);
+	struct irq_ops *ops;
 
 	void *owner;			/* Opaque pointer to reserve an interrupt
 					   for in-kernel devices. */
@@ -355,7 +361,7 @@ void kvm_vgic_init_cpu_hardware(void);
 int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
 			bool level, void *owner);
 int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
-			  u32 vintid, bool (*get_input_level)(int vindid));
+			  u32 vintid, struct irq_ops *ops);
 int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int vintid);
 bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int vintid);