Commit 2af25738 authored by Tianyang Zhang's avatar Tianyang Zhang Committed by Thomas Gleixner
Browse files

irqchip/loongarch-avec: Add multi-nodes topology support 



avecintc_init() enables the Advanced Interrupt Controller (AVEC) of
the boot CPU node, but nothing enables the AVEC on secondary nodes.

Move the enablement to the CPU hotplug callback so that secondary nodes get
the AVEC enabled too. In theory enabling it once per node would be
sufficient, but redundant enabling does no hurt, so keep the code simple
and do it unconditionally.

Signed-off-by: default avatarTianyang Zhang <zhangtianyang@loongson.cn>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Link: https://lore.kernel.org/all/20250111023704.17285-1-zhangtianyang@loongson.cn
parent e3ab1fc9

drivers/irqchip/irq-loongarch-avec.c

+12 −4
Original line number Diff line number Diff line
@@ -56,6 +56,15 @@ struct avecintc_data { 
	unsigned int		moving;

};



static inline void avecintc_enable(void)

{

	u64 value;



	value = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC);

	value |= IOCSR_MISC_FUNC_AVEC_EN;

	iocsr_write64(value, LOONGARCH_IOCSR_MISC_FUNC);

}



static inline void avecintc_ack_irq(struct irq_data *d)

{

}
@@ -127,6 +136,8 @@ static int avecintc_cpu_online(unsigned int cpu) 


	guard(raw_spinlock)(&loongarch_avec.lock);



	avecintc_enable();



	irq_matrix_online(loongarch_avec.vector_matrix);



	pending_list_init(cpu);
@@ -339,7 +350,6 @@ static int __init irq_matrix_init(void) 
static int __init avecintc_init(struct irq_domain *parent)

{

	int ret, parent_irq;

	unsigned long value;



	raw_spin_lock_init(&loongarch_avec.lock);
@@ -378,9 +388,7 @@ static int __init avecintc_init(struct irq_domain *parent) 
				  "irqchip/loongarch/avecintc:starting",

				  avecintc_cpu_online, avecintc_cpu_offline);

#endif

	value = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC);

	value |= IOCSR_MISC_FUNC_AVEC_EN;

	iocsr_write64(value, LOONGARCH_IOCSR_MISC_FUNC);

	avecintc_enable();



	return ret;