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authorGuo Ren <ren_guo@c-sky.com>2019-05-21 15:54:05 +0800
committerMarc Zyngier <marc.zyngier@arm.com>2019-06-05 09:27:07 +0100
commitdb56c5128e6625cb16efc4910b60627e46f608e3 (patch)
tree2505df2796799502826fc952c2ca113e71dbe99b /drivers/irqchip
parent16e32c3cde7763ab875b9030b443ecbc8e352d8a (diff)
downloadlinux-db56c5128e6625cb16efc4910b60627e46f608e3.tar.bz2
irqchip/irq-csky-mpintc: Support auto irq deliver to all cpus
The csky,mpintc could deliver a external irq to one cpu or all cpus, but it couldn't deliver a external irq to a group of cpus with cpu_mask. So we only use auto deliver mode when affinity mask_val is equal to cpu_present_mask. There is no limitation for only two cpus in SMP system. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-csky-mpintc.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-csky-mpintc.c b/drivers/irqchip/irq-csky-mpintc.c
index c67c961ab6cc..a4c1aacba1ff 100644
--- a/drivers/irqchip/irq-csky-mpintc.c
+++ b/drivers/irqchip/irq-csky-mpintc.c
@@ -89,8 +89,19 @@ static int csky_irq_set_affinity(struct irq_data *d,
if (cpu >= nr_cpu_ids)
return -EINVAL;
- /* Enable interrupt destination */
- cpu |= BIT(31);
+ /*
+ * The csky,mpintc could support auto irq deliver, but it only
+ * could deliver external irq to one cpu or all cpus. So it
+ * doesn't support deliver external irq to a group of cpus
+ * with cpu_mask.
+ * SO we only use auto deliver mode when affinity mask_val is
+ * equal to cpu_present_mask.
+ *
+ */
+ if (cpumask_equal(mask_val, cpu_present_mask))
+ cpu = 0;
+ else
+ cpu |= BIT(31);
writel_relaxed(cpu, INTCG_base + INTCG_CIDSTR + offset);