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irqchip/mips-gic: Support multi-cluster in for_each_online_cpu_gic()

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Use CM's GCR_CL_REDIRECT register to access registers in remote clusters,
so that users of gic_with_each_online_cpu() gains support for multi-cluster
without further changes.

Signed-off-by: Paul Burton <paulburton@kernel.org>
Signed-off-by: Chao-ying Fu <cfu@wavecomp.com>
Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: Aleksandar Rikalo <arikalo@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/all/20241028175935.51250-3-arikalo@gmail.com
This commit is contained in:
Paul Burton 2024-10-28 18:59:24 +01:00 committed by Thomas Gleixner
parent 496461050b
commit d9e2ed610a
1 changed files with 7 additions and 0 deletions
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7
drivers/irqchip/irq-mips-gic.c
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@ -88,6 +88,12 @@ static int __gic_with_next_online_cpu(int prev)
return cpu;
}
static inline void gic_unlock_cluster(void)
{
if (mips_cps_multicluster_cpus())
mips_cm_unlock_other();
}
/**
* for_each_online_cpu_gic() - Iterate over online CPUs, access local registers
* @cpu: An integer variable to hold the current CPU number
@ -102,6 +108,7 @@ static int __gic_with_next_online_cpu(int prev)
guard(raw_spinlock_irqsave)(gic_lock); \
for ((cpu) = __gic_with_next_online_cpu(-1); \
(cpu) < nr_cpu_ids; \
gic_unlock_cluster(), \
(cpu) = __gic_with_next_online_cpu(cpu))
static void gic_clear_pcpu_masks(unsigned int intr)