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| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-07-20 16:40:58 +0200 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-07-20 16:40:58 +0200 |
| commit | 08f417db702c5b05150b3851af7186fee96ddd46 (patch) | |
| tree | 7268a740e178602b1854e2480a9a8fc1fd602184 /arch/loongarch/include/asm | |
| parent | LoongArch: Always enumerate MADT and setup logical-physical CPU mapping (diff) | |
| download | linux-08f417db702c5b05150b3851af7186fee96ddd46.tar.xz linux-08f417db702c5b05150b3851af7186fee96ddd46.zip | |
LoongArch: Add irq_work support via self IPIs
Add irq_work support for LoongArch via self IPIs. This make it possible
to run works in hardware interrupt context, which is a prerequisite for
NOHZ_FULL.
Implement:
- arch_irq_work_raise()
- arch_irq_work_has_interrupt()
Reviewed-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm')
| -rw-r--r-- | arch/loongarch/include/asm/hardirq.h | 3 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/irq_work.h | 10 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/smp.h | 2 |
3 files changed, 14 insertions, 1 deletions
diff --git a/arch/loongarch/include/asm/hardirq.h b/arch/loongarch/include/asm/hardirq.h index d41138abcf26..1d7feb719515 100644 --- a/arch/loongarch/include/asm/hardirq.h +++ b/arch/loongarch/include/asm/hardirq.h @@ -12,11 +12,12 @@ extern void ack_bad_irq(unsigned int irq); #define ack_bad_irq ack_bad_irq -#define NR_IPI 2 +#define NR_IPI 3 enum ipi_msg_type { IPI_RESCHEDULE, IPI_CALL_FUNCTION, + IPI_IRQ_WORK, }; typedef struct { diff --git a/arch/loongarch/include/asm/irq_work.h b/arch/loongarch/include/asm/irq_work.h new file mode 100644 index 000000000000..d63076e9160d --- /dev/null +++ b/arch/loongarch/include/asm/irq_work.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_LOONGARCH_IRQ_WORK_H +#define _ASM_LOONGARCH_IRQ_WORK_H + +static inline bool arch_irq_work_has_interrupt(void) +{ + return IS_ENABLED(CONFIG_SMP); +} + +#endif /* _ASM_LOONGARCH_IRQ_WORK_H */ diff --git a/arch/loongarch/include/asm/smp.h b/arch/loongarch/include/asm/smp.h index 278700cfee88..50db503f44e3 100644 --- a/arch/loongarch/include/asm/smp.h +++ b/arch/loongarch/include/asm/smp.h @@ -69,9 +69,11 @@ extern int __cpu_logical_map[NR_CPUS]; #define ACTION_BOOT_CPU 0 #define ACTION_RESCHEDULE 1 #define ACTION_CALL_FUNCTION 2 +#define ACTION_IRQ_WORK 3 #define SMP_BOOT_CPU BIT(ACTION_BOOT_CPU) #define SMP_RESCHEDULE BIT(ACTION_RESCHEDULE) #define SMP_CALL_FUNCTION BIT(ACTION_CALL_FUNCTION) +#define SMP_IRQ_WORK BIT(ACTION_IRQ_WORK) struct secondary_data { unsigned long stack; |