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/* 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 */
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