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authorVineet Gupta <vgupta@synopsys.com>2015-06-30 13:37:28 +0530
committerVineet Gupta <vgupta@synopsys.com>2015-07-06 11:09:02 +0530
commit83ce3e6fcc16b4d36d40765618777b5a6a30d75b (patch)
tree1ba2e1ee5d780f6505b572161a2247530aef0f39 /arch/arc
parentbccea41ec02301a439a26e43fa49521ae8da4352 (diff)
ARCv2: intc: IDU: support irq affinity
With this nsim standlone / OSCI have working irq affinity - AXS103 still needs some work as IDU is not visible in intc hierarchy yet ! Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/kernel/mcip.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/arc/kernel/mcip.c b/arch/arc/kernel/mcip.c
index 30284e8de6ff..dfeea22048af 100644
--- a/arch/arc/kernel/mcip.c
+++ b/arch/arc/kernel/mcip.c
@@ -218,11 +218,28 @@ static void idu_irq_unmask(struct irq_data *data)
raw_spin_unlock_irqrestore(&mcip_lock, flags);
}
+#ifdef CONFIG_SMP
static int
-idu_irq_set_affinity(struct irq_data *d, const struct cpumask *cpumask, bool f)
+idu_irq_set_affinity(struct irq_data *data, const struct cpumask *cpumask,
+ bool force)
{
+ unsigned long flags;
+ cpumask_t online;
+
+ /* errout if no online cpu per @cpumask */
+ if (!cpumask_and(&online, cpumask, cpu_online_mask))
+ return -EINVAL;
+
+ raw_spin_lock_irqsave(&mcip_lock, flags);
+
+ idu_set_dest(data->hwirq, cpumask_bits(&online)[0]);
+ idu_set_mode(data->hwirq, IDU_M_TRIG_LEVEL, IDU_M_DISTRI_RR);
+
+ raw_spin_unlock_irqrestore(&mcip_lock, flags);
+
return IRQ_SET_MASK_OK;
}
+#endif
static struct irq_chip idu_irq_chip = {
.name = "MCIP IDU Intc",