Commit 97b1f5aa authored by Guo Ren's avatar Guo Ren Committed by Greg Kroah-Hartman

irqchip/irq-csky-mpintc: Support auto irq deliver to all cpus

[ Upstream commit db56c512 ]

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: default avatarGuo Ren <ren_guo@c-sky.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent f71b47b3
......@@ -89,7 +89,18 @@ static int csky_irq_set_affinity(struct irq_data *d,
if (cpu >= nr_cpu_ids)
return -EINVAL;
/* Enable interrupt destination */
/*
* 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);
......
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