u8 priority;
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);
+
void *owner; /* Opaque pointer to reserve an interrupt
for in-kernel devices. */
};
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);
+ u32 vintid, bool (*get_input_level)(int vindid));
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);
kfree(irq);
}
-/* Get the input level of a mapped IRQ directly from the physical GIC */
bool vgic_get_phys_line_level(struct vgic_irq *irq)
{
bool line_level;
BUG_ON(!irq->hw);
+ if (irq->get_input_level)
+ return irq->get_input_level(irq->intid);
+
WARN_ON(irq_get_irqchip_state(irq->host_irq,
IRQCHIP_STATE_PENDING,
&line_level));
/* @irq->irq_lock must be held */
static int kvm_vgic_map_irq(struct kvm_vcpu *vcpu, struct vgic_irq *irq,
- unsigned int host_irq)
+ unsigned int host_irq,
+ bool (*get_input_level)(int vindid))
{
struct irq_desc *desc;
struct irq_data *data;
irq->hw = true;
irq->host_irq = host_irq;
irq->hwintid = data->hwirq;
+ irq->get_input_level = get_input_level;
return 0;
}
{
irq->hw = false;
irq->hwintid = 0;
+ irq->get_input_level = NULL;
}
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
- u32 vintid)
+ u32 vintid, bool (*get_input_level)(int vindid))
{
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
unsigned long flags;
BUG_ON(!irq);
spin_lock_irqsave(&irq->irq_lock, flags);
- ret = kvm_vgic_map_irq(vcpu, irq, host_irq);
+ ret = kvm_vgic_map_irq(vcpu, irq, host_irq, get_input_level);
spin_unlock_irqrestore(&irq->irq_lock, flags);
vgic_put_irq(vcpu->kvm, irq);