[PATCH v5 p2 02/19] xen/arm: vgic: Add spi_to_pending

[Julien Grall <julien.grall@citrix.com>]

From: Julien Grall <julien.grall@linaro.org>

Introduce spi_to_pending in order retrieve the irq_pending structure for
a specific SPI.

It's not possible to re-use irq_to_pending because it's required a VCPU
and some call of the new function may during domain destruction after
the VCPUs are freed.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

---
    Changes in v5:
        - Add Ian's Ack

    Changes in v4:
        - Patch added
---
 xen/arch/arm/vgic.c        | 7 +++++++
 xen/include/asm-arm/vgic.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 150624a..55c8927 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -371,6 +371,13 @@ struct pending_irq *irq_to_pending(struct vcpu *v, unsigned int irq)
     return n;
 }
 
+struct pending_irq *spi_to_pending(struct domain *d, unsigned int irq)
+{
+    ASSERT(irq >= NR_LOCAL_IRQS);
+
+    return &d->arch.vgic.pending_irqs[irq - 32];
+}
+
 void vgic_clear_pending_irqs(struct vcpu *v)
 {
     struct pending_irq *p, *t;
diff --git a/xen/include/asm-arm/vgic.h b/xen/include/asm-arm/vgic.h
index 647f2fe..8d22532 100644
--- a/xen/include/asm-arm/vgic.h
+++ b/xen/include/asm-arm/vgic.h
@@ -185,6 +185,7 @@ 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 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);
 extern struct vgic_irq_rank *vgic_rank_irq(struct vcpu *v, unsigned int irq);
 extern int vgic_emulate(struct cpu_user_regs *regs, union hsr hsr);
-- 
2.1.4