[Xen-devel] [RFC PATCH 39/49] ARM: new VGIC: Add event channel IRQ handling

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

The Xen core/arch code relies on two abstracted functions to inject an
event channel IRQ and to query its pending state.
Implement those to query the state of the new VGIC implementation.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
---
 xen/arch/arm/vgic/vgic.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/xen/arch/arm/vgic/vgic.c b/xen/arch/arm/vgic/vgic.c
index 8d5260a7db..b62cda7d2f 100644
--- a/xen/arch/arm/vgic/vgic.c
+++ b/xen/arch/arm/vgic/vgic.c
@@ -693,6 +693,26 @@ void vgic_kick_vcpus(struct domain *d)
     }
 }
 
+void arch_evtchn_inject(struct vcpu *v)
+{
+    vgic_inject_irq(v->domain, v, v->domain->arch.evtchn_irq, true);
+}
+
+bool vgic_evtchn_irq_pending(struct vcpu *v)
+{
+    struct vgic_irq *irq;
+    bool pending;
+
+    /* Does not work for LPIs. */
+    ASSERT(!is_lpi(v->domain->arch.evtchn_irq));
+
+    irq = vgic_get_irq(v->domain, v, v->domain->arch.evtchn_irq);
+    pending = irq_is_pending(irq);
+    vgic_put_irq(v->domain, irq);
+
+    return pending;
+}
+
 struct irq_desc *vgic_get_hw_irq_desc(struct domain *d, struct vcpu *v,
                                       unsigned int virq)
 {
-- 
2.14.1


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