ARM: new VGIC: Dump virtual IRQ info

When we dump guest state on the Xen console, we also print the state of
IRQs that are on a VCPU.
Add the code to dump the state of an IRQ handled by the new VGIC.

Signed-off-by: Andre Przywara <andre.przywara@linaro.org>
Acked-by: Julien Grall <julien.grall@arm.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

diff --git a/xen/arch/arm/vgic/vgic.c b/xen/arch/arm/vgic/vgic.c
index 0228db0971d384799459e3bb1aab64a2f7178f4a..fae7af81ce5b5c19b18546532e9cf8a84a6faeb7 100644 (file)
--- a/xen/arch/arm/vgic/vgic.c
+++ b/xen/arch/arm/vgic/vgic.c
@@ -759,6 +759,31 @@ void vgic_free_virq(struct domain *d, unsigned int virq)
     clear_bit(virq, d->arch.vgic.allocated_irqs);
 }
 
+void gic_dump_vgic_info(struct vcpu *v)
+{
+    struct vgic_cpu *vgic_cpu = &v->arch.vgic;
+    struct vgic_irq *irq;
+    unsigned long flags;
+
+    spin_lock_irqsave(&v->arch.vgic.ap_list_lock, flags);
+
+    if ( !list_empty(&vgic_cpu->ap_list_head) )
+        printk("   active or pending interrupts queued:\n");
+
+    list_for_each_entry ( irq, &vgic_cpu->ap_list_head, ap_list )
+    {
+        spin_lock(&irq->irq_lock);
+        printk("     %s %s irq %u: %spending, %sactive, %senabled\n",
+               irq->hw ? "hardware" : "virtual",
+               irq->config == VGIC_CONFIG_LEVEL ? "level" : "edge",
+               irq->intid, irq_is_pending(irq) ? "" : "not ",
+               irq->active ? "" : "not ", irq->enabled ? "" : "not ");
+        spin_unlock(&irq->irq_lock);
+    }
+
+    spin_unlock_irqrestore(&v->arch.vgic.ap_list_lock, flags);
+}
+
 struct irq_desc *vgic_get_hw_irq_desc(struct domain *d, struct vcpu *v,
                                       unsigned int virq)
 {