[v10,08/32] ARM: GIC: export and extend vgic_init_pending_irq()

Commit Message

Andre Przywara May 26, 2017, 5:35 p.m. UTC

For LPIs we later want to dynamically allocate struct pending_irqs.
So beside needing to initialize the struct from there we also need
to clean it up and re-initialize it later on.
Export vgic_init_pending_irq() and extend it to be reusable.

Signed-off-by: Andre Przywara <[e-mail]>
---
 xen/arch/arm/vgic.c        | 5 ++++-
 xen/include/asm-arm/vgic.h | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

Patch

diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index b38c990..6109d99 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -60,11 +60,14 @@  struct vgic_irq_rank *vgic_rank_irq(struct vcpu *v, unsigned int irq)
     return vgic_get_rank(v, rank);
 }
 
-static void vgic_init_pending_irq(struct pending_irq *p, unsigned int virq)
+void vgic_init_pending_irq(struct pending_irq *p, unsigned int virq)
 {
+    memset(p, 0, sizeof(*p));
+
     INIT_LIST_HEAD(&p->inflight);
     INIT_LIST_HEAD(&p->lr_queue);
     p->irq = virq;
+    p->lr = GIC_INVALID_LR;
 }
 
 static void vgic_rank_init(struct vgic_irq_rank *rank, uint8_t index,
diff --git a/xen/include/asm-arm/vgic.h b/xen/include/asm-arm/vgic.h
index c9075a9..a59be6d 100644
--- a/xen/include/asm-arm/vgic.h
+++ b/xen/include/asm-arm/vgic.h
@@ -300,6 +300,7 @@  extern struct vcpu *vgic_get_target_vcpu(struct vcpu *v, unsigned int virq);
 extern void vgic_vcpu_inject_irq(struct vcpu *v, unsigned int virq);
 extern void vgic_vcpu_inject_spi(struct domain *d, unsigned int virq);
 extern void vgic_clear_pending_irqs(struct vcpu *v);
+extern void vgic_init_pending_irq(struct pending_irq *p, unsigned int virq);
 extern struct pending_irq *irq_to_pending(struct vcpu *v, unsigned int irq);
 extern struct pending_irq *spi_to_pending(struct domain *d, unsigned int irq);
 extern struct vgic_irq_rank *vgic_rank_offset(struct vcpu *v, int b, int n, int s);