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,
247 int __cpuhp_setup_state(enum cpuhp_state state,	const char *name, bool invoke,
251 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
257  * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup
260  * @name:	Name of the callback (will be used in debug output)
267 static inline int cpuhp_setup_state(enum cpuhp_state state,  in cpuhp_setup_state()
268 				    const char *name,  in cpuhp_setup_state()  argument
272 	return __cpuhp_setup_state(state, name, true, startup, teardown, false);  in cpuhp_setup_state()
276  * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling
280  * @name:	Name of the callback (will be used in debug output)
287 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_cpuslocked()
288 					       const char *name,  in cpuhp_setup_state_cpuslocked()  argument
292 	return __cpuhp_setup_state_cpuslocked(state, name, true, startup,  in cpuhp_setup_state_cpuslocked()
297  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
300  * @name:	Name of the callback.
307 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,  in cpuhp_setup_state_nocalls()
308 					    const char *name,  in cpuhp_setup_state_nocalls()  argument
312 	return __cpuhp_setup_state(state, name, false, startup, teardown,  in cpuhp_setup_state_nocalls()
317  * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without
322  * @name:	Name of the callback.
329 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_nocalls_cpuslocked()
330 						     const char *name,  in cpuhp_setup_state_nocalls_cpuslocked()  argument
334 	return __cpuhp_setup_state_cpuslocked(state, name, false, startup,  in cpuhp_setup_state_nocalls_cpuslocked()
339  * cpuhp_setup_state_multi - Add callbacks for multi state
341  * @name:	Name of the callback.
350 static inline int cpuhp_setup_state_multi(enum cpuhp_state state,  in cpuhp_setup_state_multi()
351 					  const char *name,  in cpuhp_setup_state_multi()  argument
357 	return __cpuhp_setup_state(state, name, false,  in cpuhp_setup_state_multi()
362 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
364 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
368  * cpuhp_state_add_instance - Add an instance for a state and invoke startup
375  * @state must have been earlier marked as multi-instance by
378 static inline int cpuhp_state_add_instance(enum cpuhp_state state,  in cpuhp_state_add_instance()
385  * cpuhp_state_add_instance_nocalls - Add an instance for a state without
391  * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or
394 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls()
401  * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state
412 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls_cpuslocked()
418 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
419 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
422  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
428 static inline void cpuhp_remove_state(enum cpuhp_state state)  in cpuhp_remove_state()
434  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
438 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)  in cpuhp_remove_state_nocalls()
444  * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking
451 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)  in cpuhp_remove_state_nocalls_cpuslocked()
457  * cpuhp_remove_multi_state - Remove hotplug multi state callback
464 static inline void cpuhp_remove_multi_state(enum cpuhp_state state)  in cpuhp_remove_multi_state()
469 int __cpuhp_state_remove_instance(enum cpuhp_state state,
473  * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
481 static inline int cpuhp_state_remove_instance(enum cpuhp_state state,  in cpuhp_state_remove_instance()
488  * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
495 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_remove_instance_nocalls()
502 void cpuhp_online_idle(enum cpuhp_state state);
504 static inline void cpuhp_online_idle(enum cpuhp_state state) { }  in cpuhp_online_idle()