mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 04:18:39 +08:00
62ff262227
RISC-V provides no binding (ACPI or DT) to describe per-cpu start/stop operations, so cpu_set_ops() will always detect the same operations for every CPU. Replace the cpu_ops array with a single pointer to save space and reduce boot time. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20231121234736.3489608-4-samuel.holland@sifive.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
36 lines
971 B
C
36 lines
971 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
|
|
* Based on arch/arm64/include/asm/cpu_ops.h
|
|
*/
|
|
#ifndef __ASM_CPU_OPS_H
|
|
#define __ASM_CPU_OPS_H
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/threads.h>
|
|
|
|
/**
|
|
* struct cpu_operations - Callback operations for hotplugging CPUs.
|
|
*
|
|
* @cpu_start: Boots a cpu into the kernel.
|
|
* @cpu_stop: Makes a cpu leave the kernel. Must not fail. Called from
|
|
* the cpu being stopped.
|
|
* @cpu_is_stopped: Ensures a cpu has left the kernel. Called from another
|
|
* cpu.
|
|
*/
|
|
struct cpu_operations {
|
|
int (*cpu_start)(unsigned int cpu,
|
|
struct task_struct *tidle);
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
void (*cpu_stop)(void);
|
|
int (*cpu_is_stopped)(unsigned int cpu);
|
|
#endif
|
|
};
|
|
|
|
extern const struct cpu_operations cpu_ops_spinwait;
|
|
extern const struct cpu_operations *cpu_ops;
|
|
void __init cpu_set_ops(void);
|
|
|
|
#endif /* ifndef __ASM_CPU_OPS_H */
|