diff options
| author | Olav Haugan <ohaugan@codeaurora.org> | 2016-05-29 19:35:54 -0700 |
|---|---|---|
| committer | Olav Haugan <ohaugan@codeaurora.org> | 2016-09-24 10:59:55 -0700 |
| commit | 4400ef145f2b7aac21676b25942f32fb32ed724e (patch) | |
| tree | 9de5c077f28391d1ed6dee50fab588a80dc76bdd /arch/arm/kernel | |
| parent | de1a32cd143b4db85bf18fab02782a4e8af79b17 (diff) | |
irq: Make irq affinity function cpu isolation aware
Prohibit setting the affinity of an IRQ to an isolated core.
Change-Id: I7b50778615541a64f9956573757c7f28748c4f69
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/irq.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 1d45320ee125..f56a831de043 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -37,6 +37,7 @@ #include <linux/kallsyms.h> #include <linux/proc_fs.h> #include <linux/export.h> +#include <linux/cpumask.h> #include <asm/hardware/cache-l2x0.h> #include <asm/hardware/cache-uniphier.h> @@ -127,6 +128,7 @@ static bool migrate_one_irq(struct irq_desc *desc) const struct cpumask *affinity = irq_data_get_affinity_mask(d); struct irq_chip *c; bool ret = false; + struct cpumask available_cpus; /* * If this is a per-CPU interrupt, or the affinity does not @@ -135,8 +137,15 @@ static bool migrate_one_irq(struct irq_desc *desc) if (irqd_is_per_cpu(d) || !cpumask_test_cpu(smp_processor_id(), affinity)) return false; + cpumask_copy(&available_cpus, affinity); + cpumask_andnot(&available_cpus, &available_cpus, cpu_isolated_mask); + affinity = &available_cpus; + if (cpumask_any_and(affinity, cpu_online_mask) >= nr_cpu_ids) { - affinity = cpu_online_mask; + cpumask_andnot(&available_cpus, cpu_online_mask, + cpu_isolated_mask); + if (cpumask_empty(affinity)) + affinity = cpu_online_mask; ret = true; } |