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irqchip/gicv3: Convert to hotplug state machine 

Install the callbacks via the state machine.

Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153333.163186301@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Richard Cochran 2016-07-13 17:16:05 +00:00 committed by Ingo Molnar
parent 93131f7a9b
commit 6670a6d864
2 changed files with 9 additions and 16 deletions
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24
drivers/irqchip/irq-gic-v3.c
View File

@ -538,22 +538,12 @@ static void gic_cpu_init(void)
}
#ifdef CONFIG_SMP
static int gic_secondary_init(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
gic_cpu_init();
return NOTIFY_OK;
}
/*
* Notifier for enabling the GIC CPU interface. Set an arbitrarily high
* priority because the GIC needs to be up before the ARM generic timers.
*/
static struct notifier_block gic_cpu_notifier = {
.notifier_call = gic_secondary_init,
.priority = 100,
};
static int gic_starting_cpu(unsigned int cpu)
{
gic_cpu_init();
return 0;
}
static u16 gic_compute_target_list(int *base_cpu, const struct cpumask *mask,
unsigned long cluster_id)
@ -634,7 +624,9 @@ static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
static void gic_smp_init(void)
{
set_smp_cross_call(gic_raise_softirq);
register_cpu_notifier(&gic_cpu_notifier);
cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GICV3_STARTING,
"AP_IRQ_GICV3_STARTING", gic_starting_cpu,
NULL);
}
static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,

1
include/linux/cpuhotplug.h
View File

@ -10,6 +10,7 @@ enum cpuhp_state {
CPUHP_AP_OFFLINE,
CPUHP_AP_SCHED_STARTING,
CPUHP_AP_IRQ_GIC_STARTING,
CPUHP_AP_IRQ_GICV3_STARTING,
CPUHP_AP_NOTIFY_STARTING,
CPUHP_AP_ONLINE,
CPUHP_TEARDOWN_CPU,