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csky: Add irq_work support

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

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Guo Ren 2020-07-30 17:05:51 +00:00
parent 667b9324bd
commit 2c81b07682
2 changed files with 23 additions and 0 deletions
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11
arch/csky/include/asm/irq_work.h Normal file
View File

@ -0,0 +1,11 @@
/* 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 */

12
arch/csky/kernel/smp.c
View File

@ -12,6 +12,7 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/irq_work.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/sched/task_stack.h> #include <linux/sched/task_stack.h>
@ -35,6 +36,7 @@ enum ipi_message_type {
IPI_EMPTY, IPI_EMPTY,
IPI_RESCHEDULE, IPI_RESCHEDULE,
IPI_CALL_FUNC, IPI_CALL_FUNC,
IPI_IRQ_WORK,
IPI_MAX IPI_MAX
}; };
@ -53,6 +55,9 @@ static irqreturn_t handle_ipi(int irq, void *dev)
if (ops & (1 << IPI_CALL_FUNC)) if (ops & (1 << IPI_CALL_FUNC))
generic_smp_call_function_interrupt(); generic_smp_call_function_interrupt();
if (ops & (1 << IPI_IRQ_WORK))
irq_work_run();
BUG_ON((ops >> IPI_MAX) != 0); BUG_ON((ops >> IPI_MAX) != 0);
} }
@ -108,6 +113,13 @@ void smp_send_reschedule(int cpu)
send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE); 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) void __init smp_prepare_boot_cpu(void)
{ {
} }