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irqchip/hip04: Convert to hotplug state machine 

Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

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/20160713153333.244546182@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Richard Cochran 2016-07-13 17:16:06 +00:00 committed by Ingo Molnar
parent 6670a6d864
commit 6c034d1736
2 changed files with 6 additions and 20 deletions
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25
drivers/irqchip/irq-hip04.c
View File

@ -342,26 +342,12 @@ static int hip04_irq_domain_xlate(struct irq_domain *d,
return ret; return ret;
} }
#ifdef CONFIG_SMP static int hip04_irq_starting_cpu(unsigned int cpu)
static int hip04_irq_secondary_init(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{ {
if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) hip04_irq_cpu_init(&hip04_data);
hip04_irq_cpu_init(&hip04_data); return 0;
return NOTIFY_OK;
} }
/*
* Notifier for enabling the INTC CPU interface. Set an arbitrarily high
* priority because the GIC needs to be up before the ARM generic timers.
*/
static struct notifier_block hip04_irq_cpu_notifier = {
.notifier_call = hip04_irq_secondary_init,
.priority = 100,
};
#endif
static const struct irq_domain_ops hip04_irq_domain_ops = { static const struct irq_domain_ops hip04_irq_domain_ops = {
.map = hip04_irq_domain_map, .map = hip04_irq_domain_map,
.xlate = hip04_irq_domain_xlate, .xlate = hip04_irq_domain_xlate,
@ -417,13 +403,12 @@ hip04_of_init(struct device_node *node, struct device_node *parent)
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
set_smp_cross_call(hip04_raise_softirq); set_smp_cross_call(hip04_raise_softirq);
register_cpu_notifier(&hip04_irq_cpu_notifier);
#endif #endif
set_handle_irq(hip04_handle_irq); set_handle_irq(hip04_handle_irq);
hip04_irq_dist_init(&hip04_data); hip04_irq_dist_init(&hip04_data);
hip04_irq_cpu_init(&hip04_data); cpuhp_setup_state(CPUHP_AP_IRQ_HIP04_STARTING, "AP_IRQ_HIP04_STARTING",
hip04_irq_starting_cpu, NULL);
return 0; return 0;
} }
IRQCHIP_DECLARE(hip04_intc, "hisilicon,hip04-intc", hip04_of_init); IRQCHIP_DECLARE(hip04_intc, "hisilicon,hip04-intc", hip04_of_init);

1
include/linux/cpuhotplug.h
View File

@ -11,6 +11,7 @@ enum cpuhp_state {
CPUHP_AP_SCHED_STARTING, CPUHP_AP_SCHED_STARTING,
CPUHP_AP_IRQ_GIC_STARTING, CPUHP_AP_IRQ_GIC_STARTING,
CPUHP_AP_IRQ_GICV3_STARTING, CPUHP_AP_IRQ_GICV3_STARTING,
CPUHP_AP_IRQ_HIP04_STARTING,
CPUHP_AP_NOTIFY_STARTING, CPUHP_AP_NOTIFY_STARTING,
CPUHP_AP_ONLINE, CPUHP_AP_ONLINE,
CPUHP_TEARDOWN_CPU, CPUHP_TEARDOWN_CPU,