Commit d9e2ed61 authored by Paul Burton's avatar Paul Burton Committed by Thomas Gleixner
Browse files

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



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: default avatarPaul Burton <paulburton@kernel.org>
Signed-off-by: default avatarChao-ying Fu <cfu@wavecomp.com>
Signed-off-by: default avatarDragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: default avatarAleksandar Rikalo <arikalo@gmail.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarSerge Semin <fancer.lancer@gmail.com>
Tested-by: default avatarGregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/all/20241028175935.51250-3-arikalo@gmail.com
parent 49646105

drivers/irqchip/irq-mips-gic.c

+7 −0
Original line number Diff line number Diff line
@@ -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)