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  * CPU_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,
261 int __cpuhp_setup_state(enum cpuhp_state state,	const char *name, bool invoke,
265 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
271  * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup
274  * @name:	Name of the callback (will be used in debug output)
281 static inline int cpuhp_setup_state(enum cpuhp_state state,  in cpuhp_setup_state()
282 				    const char *name,  in cpuhp_setup_state()  argument
286 	return __cpuhp_setup_state(state, name, true, startup, teardown, false);  in cpuhp_setup_state()
290  * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling
294  * @name:	Name of the callback (will be used in debug output)
301 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_cpuslocked()
302 					       const char *name,  in cpuhp_setup_state_cpuslocked()  argument
306 	return __cpuhp_setup_state_cpuslocked(state, name, true, startup,  in cpuhp_setup_state_cpuslocked()
311  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
314  * @name:	Name of the callback.
321 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,  in cpuhp_setup_state_nocalls()
322 					    const char *name,  in cpuhp_setup_state_nocalls()  argument
326 	return __cpuhp_setup_state(state, name, false, startup, teardown,  in cpuhp_setup_state_nocalls()
331  * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without
336  * @name:	Name of the callback.
343 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_nocalls_cpuslocked()
344 						     const char *name,  in cpuhp_setup_state_nocalls_cpuslocked()  argument
348 	return __cpuhp_setup_state_cpuslocked(state, name, false, startup,  in cpuhp_setup_state_nocalls_cpuslocked()
353  * cpuhp_setup_state_multi - Add callbacks for multi state
355  * @name:	Name of the callback.
364 static inline int cpuhp_setup_state_multi(enum cpuhp_state state,  in cpuhp_setup_state_multi()
365 					  const char *name,  in cpuhp_setup_state_multi()  argument
371 	return __cpuhp_setup_state(state, name, false,  in cpuhp_setup_state_multi()
376 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
378 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
382  * cpuhp_state_add_instance - Add an instance for a state and invoke startup
389  * @state must have been earlier marked as multi-instance by
392 static inline int cpuhp_state_add_instance(enum cpuhp_state state,  in cpuhp_state_add_instance()
399  * cpuhp_state_add_instance_nocalls - Add an instance for a state without
405  * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or
408 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls()
415  * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state
426 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls_cpuslocked()
432 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
433 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
436  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
442 static inline void cpuhp_remove_state(enum cpuhp_state state)  in cpuhp_remove_state()
448  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
452 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)  in cpuhp_remove_state_nocalls()
458  * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking
465 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)  in cpuhp_remove_state_nocalls_cpuslocked()
471  * cpuhp_remove_multi_state - Remove hotplug multi state callback
478 static inline void cpuhp_remove_multi_state(enum cpuhp_state state)  in cpuhp_remove_multi_state()
483 int __cpuhp_state_remove_instance(enum cpuhp_state state,
487  * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
495 static inline int cpuhp_state_remove_instance(enum cpuhp_state state,  in cpuhp_state_remove_instance()
502  * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
509 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_remove_instance_nocalls()
516 void cpuhp_online_idle(enum cpuhp_state state);
518 static inline void cpuhp_online_idle(enum cpuhp_state state) { }  in cpuhp_online_idle()