diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2019-05-21 10:54:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-21 10:01:53 +0300 |
| commit | 97b1f5aa15bde870943a87e394c5c2753b836dbc (patch) | |
| tree | b3838b4052af23e68473052eb4127b6c603e2d36 /drivers/irqchip | |
| parent | f71b47b37e29099fbf968a48dbbd1bfd99d42bec (diff) | |
| download | linux-97b1f5aa15bde870943a87e394c5c2753b836dbc.tar.xz | |
irqchip/irq-csky-mpintc: Support auto irq deliver to all cpus
[ Upstream commit db56c5128e6625cb16efc4910b60627e46f608e3 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-csky-mpintc.c | 15 |
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); |