[Xen-devel] [PATCH 1/6] xen/arm: Physical IRQ is not always equal to virtual IRQ

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

From: Julien Grall <julien.grall@xxxxxxxxxx>

From: Julien Grall <julien.grall@xxxxxxxxxx>

When Xen needs to EOI a physical IRQ, we should use the IRQ number
in irq_desc instead of the virtual IRQ.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 xen/arch/arm/gic.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index 43c11cb..7e87acb 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -880,7 +880,7 @@ static void gic_irq_eoi(void *info)
 
 static void maintenance_interrupt(int irq, void *dev_id, struct cpu_user_regs 
*regs)
 {
-    int i = 0, virq;
+    int i = 0, virq, pirq;
     uint32_t lr;
     struct vcpu *v = current;
     uint64_t eisr = GICH[GICH_EISR0] | (((uint64_t) GICH[GICH_EISR1]) << 32);
@@ -916,6 +916,7 @@ static void maintenance_interrupt(int irq, void *dev_id, 
struct cpu_user_regs *r
             /* Assume only one pcpu needs to EOI the irq */
             cpu = p->desc->arch.eoi_cpu;
             eoi = 1;
+            pirq = p->desc->irq;
         }
         list_del_init(&p->inflight);
         spin_unlock_irq(&v->arch.vgic.lock);
@@ -924,10 +925,10 @@ static void maintenance_interrupt(int irq, void *dev_id, 
struct cpu_user_regs *r
             /* this is not racy because we can't receive another irq of the
              * same type until we EOI it.  */
             if ( cpu == smp_processor_id() )
-                gic_irq_eoi((void*)(uintptr_t)virq);
+                gic_irq_eoi((void*)(uintptr_t)pirq);
             else
                 on_selected_cpus(cpumask_of(cpu),
-                                 gic_irq_eoi, (void*)(uintptr_t)virq, 0);
+                                 gic_irq_eoi, (void*)(uintptr_t)pirq, 0);
         }
 
         i++;
-- 
1.7.10.4


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