[Xen-devel] [PATCH V2 5/8] xen/arm: vGIC: Consider AFF1 when injecting SGI.

[Chen Baozi <cbz@xxxxxxxxxx>]

From: Chen Baozi <baozich@xxxxxxxxx>

Use the AFF1 value of ICC_SGI1R_EL1 when injecting SGI in vGIC,
which expands the number of supported vCPU more than 16 that
target list bitmap can hold independently.

Signed-off-by: Chen Baozi <baozich@xxxxxxxxx>
---
 xen/arch/arm/vgic.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index 7b387b7..27bd137 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -367,13 +367,19 @@ int vgic_to_sgi(struct vcpu *v, register_t sgir, enum 
gic_sgi_mode irqmode, int
 
     for_each_set_bit( vcpuid, &vcpu_mask, d->max_vcpus )
     {
-        if ( d->vcpu[vcpuid] != NULL && !is_vcpu_online(d->vcpu[vcpuid]) )
+        /*
+         * XXX: We assumes that only AFF1 and target list are used in
+         * ICC_SGI1R_EL1.
+         */
+        int real_id = vcpuid + ((sgir >> 16) & 0xff) * 16;
+
+        if ( d->vcpu[real_id] != NULL && !is_vcpu_online(d->vcpu[real_id]) )
         {
             gprintk(XENLOG_WARNING, "VGIC: write r=%"PRIregister" \
                     vcpu_mask=%lx, wrong CPUTargetList\n", sgir, vcpu_mask);
             continue;
         }
-        vgic_vcpu_inject_irq(d->vcpu[vcpuid], virq);
+        vgic_vcpu_inject_irq(d->vcpu[real_id], virq);
     }
     return 1;
 }
-- 
2.1.4


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