diff options
| -rw-r--r-- | include/linux/irq.h | 4 | ||||
| -rw-r--r-- | include/linux/irqdesc.h | 1 | ||||
| -rw-r--r-- | kernel/irq/irqdesc.c | 26 |
3 files changed, 30 insertions, 1 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index c4de62348ff2..4d758a7c604a 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -530,6 +530,10 @@ static inline void irq_set_chip_and_handler(unsigned int irq, struct irq_chip *c } extern int irq_set_percpu_devid(unsigned int irq); +extern int irq_set_percpu_devid_partition(unsigned int irq, + const struct cpumask *affinity); +extern int irq_get_percpu_devid_partition(unsigned int irq, + struct cpumask *affinity); extern void __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained, diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index dcca77c4b9d2..b51beebf9804 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -66,6 +66,7 @@ struct irq_desc { int threads_handled_last; raw_spinlock_t lock; struct cpumask *percpu_enabled; + const struct cpumask *percpu_affinity; #ifdef CONFIG_SMP const struct cpumask *affinity_hint; struct irq_affinity_notify *affinity_notify; diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 0ccd028817d7..8731e1c5d1e7 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -595,7 +595,8 @@ void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus) chip_bus_sync_unlock(desc); } -int irq_set_percpu_devid(unsigned int irq) +int irq_set_percpu_devid_partition(unsigned int irq, + const struct cpumask *affinity) { struct irq_desc *desc = irq_to_desc(irq); @@ -610,10 +611,33 @@ int irq_set_percpu_devid(unsigned int irq) if (!desc->percpu_enabled) return -ENOMEM; + if (affinity) + desc->percpu_affinity = affinity; + else + desc->percpu_affinity = cpu_possible_mask; + irq_set_percpu_devid_flags(irq); return 0; } +int irq_set_percpu_devid(unsigned int irq) +{ + return irq_set_percpu_devid_partition(irq, NULL); +} + +int irq_get_percpu_devid_partition(unsigned int irq, struct cpumask *affinity) +{ + struct irq_desc *desc = irq_to_desc(irq); + + if (!desc || !desc->percpu_enabled) + return -EINVAL; + + if (affinity) + cpumask_copy(affinity, desc->percpu_affinity); + + return 0; +} + void kstat_incr_irq_this_cpu(unsigned int irq) { kstat_incr_irqs_this_cpu(irq_to_desc(irq)); |