Commit 2c81b076 authored by Guo Ren's avatar Guo Ren
Browse files

csky: Add irq_work support 



Running work in hardware interrupt context for csky. Implement:
 - arch_irq_work_raise()
 - arch_irq_work_has_interrupt()

Signed-off-by: default avatarGuo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
parent 667b9324

arch/csky/include/asm/irq_work.h

0 → 100644
+11 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */



#ifndef __ASM_CSKY_IRQ_WORK_H

#define __ASM_CSKY_IRQ_WORK_H



static inline bool arch_irq_work_has_interrupt(void)

{

	return true;

}

extern void arch_irq_work_raise(void);

#endif /* __ASM_CSKY_IRQ_WORK_H */

arch/csky/kernel/smp.c

+12 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/delay.h>

#include <linux/err.h>

#include <linux/irq.h>

#include <linux/irq_work.h>

#include <linux/irqdomain.h>

#include <linux/of.h>

#include <linux/sched/task_stack.h>
@@ -35,6 +36,7 @@ enum ipi_message_type { 
	IPI_EMPTY,

	IPI_RESCHEDULE,

	IPI_CALL_FUNC,

	IPI_IRQ_WORK,

	IPI_MAX

};
@@ -53,6 +55,9 @@ static irqreturn_t handle_ipi(int irq, void *dev) 
		if (ops & (1 << IPI_CALL_FUNC))

			generic_smp_call_function_interrupt();



		if (ops & (1 << IPI_IRQ_WORK))

			irq_work_run();



		BUG_ON((ops >> IPI_MAX) != 0);

	}
@@ -108,6 +113,13 @@ void smp_send_reschedule(int cpu) 
	send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);

}



#ifdef CONFIG_IRQ_WORK

void arch_irq_work_raise(void)

{

	send_ipi_message(cpumask_of(smp_processor_id()), IPI_IRQ_WORK);

}

#endif



void __init smp_prepare_boot_cpu(void)

{

}