In order to prepare the genirq layer for the concept of partitionned
percpu interrupts, let's allow an affinity to be associated with
such an interrupt. We introduce:
- irq_set_percpu_devid_partition: flag an interrupt as a percpu-devid
interrupt, and associate it with an affinity
- irq_get_percpu_devid_partition: allow the affinity of that interrupt
to be retrieved.
This will allow a driver to discover which CPUs the per-cpu interrupt
can actually fire on.
Change-Id: I251774db34d1f0145d6c051265886c22f41d941e
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Link: http://lkml.kernel.org/r/1460365075-7316-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
(cherry picked from commit
222df54fd8b7641dcc81476f157806bb3144ee1d)
}
extern int irq_set_percpu_devid(unsigned int irq);
}
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,
extern void
__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
int threads_handled_last;
raw_spinlock_t lock;
struct cpumask *percpu_enabled;
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;
#ifdef CONFIG_SMP
const struct cpumask *affinity_hint;
struct irq_affinity_notify *affinity_notify;
chip_bus_sync_unlock(desc);
}
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);
{
struct irq_desc *desc = irq_to_desc(irq);
if (!desc->percpu_enabled)
return -ENOMEM;
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;
}
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));
void kstat_incr_irq_this_cpu(unsigned int irq)
{
kstat_incr_irqs_this_cpu(irq_to_desc(irq));