ARM: KVM: VGIC interrupt injection

Plug the interrupt injection code. Interrupts can now be generated
from user space.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm/include/asm/kvm_vgic.h b/arch/arm/include/asm/kvm_vgic.h
index c2dc857..11a6d90 100644
--- a/arch/arm/include/asm/kvm_vgic.h
+++ b/arch/arm/include/asm/kvm_vgic.h
@@ -147,6 +147,8 @@
 int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr);
 void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu);
 void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu);
+int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,
+			bool level);
 int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
 bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
 		      struct kvm_exit_mmio *mmio);
@@ -182,6 +184,12 @@
 static inline void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) {}
 static inline void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) {}
 
+static inline int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid,
+				      unsigned int irq_num, bool level)
+{
+	return 0;
+}
+
 static inline int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
 {
 	return 0;