[Xen-devel] [PATCH v10 05/32] ARM: vGIC: introduce gic_remove_irq()

[Andre Przywara <andre.przywara@xxxxxxx>]

To avoid code duplication in a later patch, introduce a generic function
to remove a virtual IRQ from the VGIC.
Call that function instead of the open-coded version in vgic_migrate_irq().

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
 xen/arch/arm/gic.c        | 9 +++++++++
 xen/arch/arm/vgic.c       | 1 +
 xen/include/asm-arm/gic.h | 1 +
 3 files changed, 11 insertions(+)

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index 9dde146..3a6184a 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -408,6 +408,15 @@ void gic_remove_from_lr_pending(struct vcpu *v, struct 
pending_irq *p)
         list_del_init(&p->lr_queue);
 }
 
+void gic_remove_irq(struct vcpu *v, struct pending_irq *p)
+{
+    ASSERT(spin_is_locked(&v->arch.vgic.lock));
+
+    clear_bit(GIC_IRQ_GUEST_QUEUED, &p->status);
+    list_del_init(&p->inflight);
+    gic_remove_from_lr_pending(v, p);
+}
+
 void gic_raise_inflight_irq(struct vcpu *v, unsigned int virtual_irq)
 {
     struct pending_irq *n = irq_to_pending(v, virtual_irq);
diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 3993965..b2acc99 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -266,6 +266,7 @@ bool vgic_migrate_irq(struct vcpu *old, struct vcpu *new, 
unsigned int irq)
     /* If the IRQ is still lr_pending, re-inject it to the new vcpu */
     if ( !list_empty(&p->lr_queue) )
     {
+        gic_remove_irq(old, p);
         clear_bit(GIC_IRQ_GUEST_QUEUED, &p->status);
         list_del_init(&p->lr_queue);
         list_del_init(&p->inflight);
diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index 3130634..5d5b4cc 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -244,6 +244,7 @@ extern void gic_raise_guest_irq(struct vcpu *v, unsigned 
int irq,
         unsigned int priority);
 extern void gic_raise_inflight_irq(struct vcpu *v, unsigned int virtual_irq);
 extern void gic_remove_from_lr_pending(struct vcpu *v, struct pending_irq *p);
+extern void gic_remove_irq(struct vcpu *v, struct pending_irq *p);
 
 /* Accept an interrupt from the GIC and dispatch its handler */
 extern void gic_interrupt(struct cpu_user_regs *regs, int is_fiq);
-- 
2.9.0


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