/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2013 ARM Ltd. */#ifndef __ASM_CPU_OPS_H#define __ASM_CPU_OPS_H #include <linux/init.h>#include <linux/threads.h> /** * struct cpu_operations - Callback operations for hotplugging CPUs. * * @name:	Name of the property as appears in a devicetree cpu node's *		enable-method property. On systems booting with ACPI, @name *		identifies the struct cpu_operations entry corresponding to *		the boot protocol specified in the ACPI MADT table. * @cpu_init:	Reads any data necessary for a specific enable-method for a *		proposed logical id. * @cpu_prepare: Early one-time preparation step for a cpu. If there is a *		mechanism for doing so, tests whether it is possible to boot *		the given CPU. * @cpu_boot:	Boots a cpu into the kernel. * @cpu_postboot: Optionally, perform any post-boot cleanup or necessary *		synchronisation. Called from the cpu being booted. * @cpu_can_disable: Determines whether a CPU can be disabled based on *		mechanism-specific information. * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific * 		reason, which will cause the hot unplug to be aborted. Called * 		from the cpu to be killed. * @cpu_die:	Makes a cpu leave the kernel. Must not fail. Called from the *		cpu being killed. * @cpu_kill:  Ensures a cpu has left the kernel. Called from another cpu. */struct cpu_operations {	const char	*name;	int		(*cpu_init)(unsigned int);	int		(*cpu_prepare)(unsigned int);	int		(*cpu_boot)(unsigned int);	void		(*cpu_postboot)(void);#ifdef CONFIG_HOTPLUG_CPU	bool		(*cpu_can_disable)(unsigned int cpu);	int		(*cpu_disable)(unsigned int cpu);	void		(*cpu_die)(unsigned int cpu);	int		(*cpu_kill)(unsigned int cpu);#endif}; int __init init_cpu_ops(int cpu);extern const struct cpu_operations *get_cpu_ops(int cpu); static inline void __init init_bootcpu_ops(void){	init_cpu_ops(0);} #endif /* ifndef __ASM_CPU_OPS_H */