Commit f24b8441 authored by Jianmin Lv's avatar Jianmin Lv Committed by Hongchen Zhang
Browse files

LoongArch: Remove generic irq migration 

LoongArch inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7362E



--------------------------------

Change-Id: I68a4dfac179ea2575925c3cd256e1179a5934c33
Signed-off-by: default avatarJianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: default avatarJuxin Gao <gaojuxin@loongson.cn>
parent 9c9c0dfe

arch/loongarch/Kconfig

+5 −6
Original line number Diff line number Diff line
@@ -395,7 +395,6 @@ config SMP 
config HOTPLUG_CPU

	bool "Support for hot-pluggable CPUs"

	depends on SMP

	select GENERIC_IRQ_MIGRATION

	help

	Say Y here to allow turning CPUs off and on. CPUs can be

	controlled through /sys/devices/system/cpu.

arch/loongarch/include/asm/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -119,6 +119,7 @@ extern struct fwnode_handle *pch_lpc_handle; 
extern struct fwnode_handle *pch_pic_handle[MAX_IO_PICS];



extern irqreturn_t loongson3_ipi_interrupt(int irq, void *dev);

extern void fixup_irqs(void);



#include <asm-generic/irq.h>

arch/loongarch/kernel/irq.c

+36 −0
Original line number Diff line number Diff line
@@ -96,6 +96,42 @@ static int __init get_ipi_irq(void) 
	return -EINVAL;

}



#ifdef CONFIG_HOTPLUG_CPU

static void handle_irq_affinity(void)

{

	struct irq_desc *desc;

	struct irq_chip *chip;

	unsigned int irq;

	unsigned long flags;

	struct cpumask *affinity;



	for_each_active_irq(irq) {

		desc = irq_to_desc(irq);

		if (!desc)

			continue;



		raw_spin_lock_irqsave(&desc->lock, flags);



		affinity = desc->irq_data.common->affinity;

		if (!cpumask_intersects(affinity, cpu_online_mask))

			cpumask_copy(affinity, cpu_online_mask);



		chip = irq_data_get_irq_chip(&desc->irq_data);

		if (chip && chip->irq_set_affinity)

			chip->irq_set_affinity(&desc->irq_data,

					desc->irq_data.common->affinity, true);

		raw_spin_unlock_irqrestore(&desc->lock, flags);

	}

}



void fixup_irqs(void)

{

	handle_irq_affinity();

	irq_cpu_offline();

	clear_csr_ecfg(ECFG0_IM);

}

#endif



void __init init_IRQ(void)

{

	int i, ret;

arch/loongarch/kernel/smp.c

+1 −2
Original line number Diff line number Diff line
@@ -272,8 +272,7 @@ int loongson3_cpu_disable(void) 
	set_cpu_online(cpu, false);

	calculate_cpu_foreign_map();

	local_irq_save(flags);

	irq_migrate_all_off_this_cpu();

	clear_csr_ecfg(ECFG0_IM);

	fixup_irqs();

	local_irq_restore(flags);

	local_flush_tlb_all();