1 /* SPDX-License-Identifier: GPL-2.0 */
8  * CPU-up			CPU-down
15  * BRINGUP_CPU->AP_OFFLINE	BRINGUP_CPU  <- AP_IDLE_DEAD (idle thread/play_dead)
17  *		  v (IRQ-off)	  ,---------------^
19  *		  |		TEARDOWN_CPU <-	AP_ONLINE_IDLE
30  * CPUHP_ONLINE - 1 down to CPUHP_OFFLINE.
43  * Adding explicit states to this enum is only necessary when:
54  * See Documentation/core-api/cpu_hotplug.rst for further information and
57 enum cpuhp_state {
58 	CPUHP_INVALID = -1,
253 int __cpuhp_setup_state(enum cpuhp_state state,	const char *name, bool invoke,
257 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
263  * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup
266  * @name:	Name of the callback (will be used in debug output)
273 static inline int cpuhp_setup_state(enum cpuhp_state state,  in cpuhp_setup_state()
274 				    const char *name,  in cpuhp_setup_state()  argument
278 	return __cpuhp_setup_state(state, name, true, startup, teardown, false);  in cpuhp_setup_state()
282  * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling
286  * @name:	Name of the callback (will be used in debug output)
293 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_cpuslocked()
294 					       const char *name,  in cpuhp_setup_state_cpuslocked()  argument
298 	return __cpuhp_setup_state_cpuslocked(state, name, true, startup,  in cpuhp_setup_state_cpuslocked()
303  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
306  * @name:	Name of the callback.
313 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,  in cpuhp_setup_state_nocalls()
314 					    const char *name,  in cpuhp_setup_state_nocalls()  argument
318 	return __cpuhp_setup_state(state, name, false, startup, teardown,  in cpuhp_setup_state_nocalls()
323  * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without
328  * @name:	Name of the callback.
335 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_nocalls_cpuslocked()
336 						     const char *name,  in cpuhp_setup_state_nocalls_cpuslocked()  argument
340 	return __cpuhp_setup_state_cpuslocked(state, name, false, startup,  in cpuhp_setup_state_nocalls_cpuslocked()
345  * cpuhp_setup_state_multi - Add callbacks for multi state
347  * @name:	Name of the callback.
356 static inline int cpuhp_setup_state_multi(enum cpuhp_state state,  in cpuhp_setup_state_multi()
357 					  const char *name,  in cpuhp_setup_state_multi()  argument
363 	return __cpuhp_setup_state(state, name, false,  in cpuhp_setup_state_multi()
368 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
370 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
374  * cpuhp_state_add_instance - Add an instance for a state and invoke startup
381  * @state must have been earlier marked as multi-instance by
384 static inline int cpuhp_state_add_instance(enum cpuhp_state state,  in cpuhp_state_add_instance()
391  * cpuhp_state_add_instance_nocalls - Add an instance for a state without
397  * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or
400 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls()
407  * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state
418 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls_cpuslocked()
424 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
425 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
428  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
434 static inline void cpuhp_remove_state(enum cpuhp_state state)  in cpuhp_remove_state()
440  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
444 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)  in cpuhp_remove_state_nocalls()
450  * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking
457 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)  in cpuhp_remove_state_nocalls_cpuslocked()
463  * cpuhp_remove_multi_state - Remove hotplug multi state callback
470 static inline void cpuhp_remove_multi_state(enum cpuhp_state state)  in cpuhp_remove_multi_state()
475 int __cpuhp_state_remove_instance(enum cpuhp_state state,
479  * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
487 static inline int cpuhp_state_remove_instance(enum cpuhp_state state,  in cpuhp_state_remove_instance()
494  * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
501 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_remove_instance_nocalls()
508 void cpuhp_online_idle(enum cpuhp_state state);
510 static inline void cpuhp_online_idle(enum cpuhp_state state) { }  in cpuhp_online_idle()