[Xen-changelog] [xen master] xen/arm: Calculate irq rank from irq number

[patchbot@xxxxxxx]

commit 5cf5289622d03ea3af5d6ca7a3b325fa4ce0b286
Author:     Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
AuthorDate: Fri Sep 12 16:39:43 2014 +0530
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Mon Sep 15 22:55:56 2014 +0100

    xen/arm: Calculate irq rank from irq number
    
    irq rank calculated is not generic and assumes
    hardware register size value which does not work
    for future GIC versions like V3.
    
    Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
    Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 xen/arch/arm/vgic.c |   21 ++++++++++++++-------
 1 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 1372ffc..c6e9479 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -31,6 +31,16 @@
 #include <asm/gic.h>
 #include <asm/vgic.h>
 
+static inline struct vgic_irq_rank *vgic_get_rank(struct vcpu *v, int rank)
+{
+    if ( rank == 0 )
+        return v->arch.vgic.private_irqs;
+    else if ( rank <= DOMAIN_NR_RANKS(v->domain) )
+        return &v->domain->arch.vgic.shared_irqs[rank - 1];
+    else
+        return NULL;
+}
+
 /*
  * Returns rank corresponding to a GICD_<FOO><n> register for
  * GICD_<FOO> with <b>-bits-per-interrupt.
@@ -40,17 +50,14 @@ struct vgic_irq_rank *vgic_rank_offset(struct vcpu *v, int 
b, int n,
 {
     int rank = REG_RANK_NR(b, (n >> s));
 
-    if ( rank == 0 )
-        return v->arch.vgic.private_irqs;
-    else if ( rank <= DOMAIN_NR_RANKS(v->domain) )
-        return &v->domain->arch.vgic.shared_irqs[rank - 1];
-    else
-        return NULL;
+    return vgic_get_rank(v, rank);
 }
 
 struct vgic_irq_rank *vgic_rank_irq(struct vcpu *v, unsigned int irq)
 {
-    return vgic_rank_offset(v, 8, irq, DABT_WORD);
+    int rank = irq/32;
+
+    return vgic_get_rank(v, rank);
 }
 
 int domain_vgic_init(struct domain *d)
--
generated by git-patchbot for /home/xen/git/xen.git#master

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