Commit-ID: 65a30f8b300107266f316d550f060ccc186201a3
Gitweb: http://git.kernel.org/tip/65a30f8b300107266f316d550f060ccc186201a3
Author: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
AuthorDate: Tue, 4 Jul 2017 10:56:35 +0100
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Tue, 4 Jul 2017 11:11:26 +0100
irqchip/gic-v3: Honor forced affinity setting
Honor the 'force' flag for set_affinity, by selecting a CPU
from the given mask (which may not be reported "online" by
the cpu_online_mask). Some drivers, like ARM PMU, rely on it.
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Reported-by: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-gic-v3.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 47630e9..5ba64a7 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -640,11 +640,16 @@ static void gic_smp_init(void)
static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
bool force)
{
- unsigned int cpu = cpumask_any_and(mask_val, cpu_online_mask);
+ unsigned int cpu;
void __iomem *reg;
int enabled;
u64 val;
+ if (force)
+ cpu = cpumask_first(mask_val);
+ else
+ cpu = cpumask_any_and(mask_val, cpu_online_mask);
+
if (cpu >= nr_cpu_ids)
return -EINVAL;
--
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