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

Message ID 20180209143937.28866-40-andre.przywara@linaro.org
State New
Headers show
Series
  • New VGIC(-v2) implementation
Related show

Commit Message

Andre Przywara Feb. 9, 2018, 2:39 p.m.
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@linaro.org>
---
 xen/arch/arm/vgic/vgic.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

Patch

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)
 {