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,
252 int __cpuhp_setup_state(enum cpuhp_state state,	const char *name, bool invoke,
256 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
262  * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup
265  * @name:	Name of the callback (will be used in debug output)
272 static inline int cpuhp_setup_state(enum cpuhp_state state,  in cpuhp_setup_state()
273 				    const char *name,  in cpuhp_setup_state()  argument
277 	return __cpuhp_setup_state(state, name, true, startup, teardown, false);  in cpuhp_setup_state()
281  * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling
285  * @name:	Name of the callback (will be used in debug output)
292 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_cpuslocked()
293 					       const char *name,  in cpuhp_setup_state_cpuslocked()  argument
297 	return __cpuhp_setup_state_cpuslocked(state, name, true, startup,  in cpuhp_setup_state_cpuslocked()
302  * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
305  * @name:	Name of the callback.
312 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,  in cpuhp_setup_state_nocalls()
313 					    const char *name,  in cpuhp_setup_state_nocalls()  argument
317 	return __cpuhp_setup_state(state, name, false, startup, teardown,  in cpuhp_setup_state_nocalls()
322  * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without
327  * @name:	Name of the callback.
334 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_setup_state_nocalls_cpuslocked()
335 						     const char *name,  in cpuhp_setup_state_nocalls_cpuslocked()  argument
339 	return __cpuhp_setup_state_cpuslocked(state, name, false, startup,  in cpuhp_setup_state_nocalls_cpuslocked()
344  * cpuhp_setup_state_multi - Add callbacks for multi state
346  * @name:	Name of the callback.
355 static inline int cpuhp_setup_state_multi(enum cpuhp_state state,  in cpuhp_setup_state_multi()
356 					  const char *name,  in cpuhp_setup_state_multi()  argument
362 	return __cpuhp_setup_state(state, name, false,  in cpuhp_setup_state_multi()
367 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
369 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
373  * cpuhp_state_add_instance - Add an instance for a state and invoke startup
380  * @state must have been earlier marked as multi-instance by
383 static inline int cpuhp_state_add_instance(enum cpuhp_state state,  in cpuhp_state_add_instance()
390  * cpuhp_state_add_instance_nocalls - Add an instance for a state without
396  * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or
399 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls()
406  * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state
417 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,  in cpuhp_state_add_instance_nocalls_cpuslocked()
423 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
424 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
427  * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
433 static inline void cpuhp_remove_state(enum cpuhp_state state)  in cpuhp_remove_state()
439  * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
443 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)  in cpuhp_remove_state_nocalls()
449  * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking
456 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)  in cpuhp_remove_state_nocalls_cpuslocked()
462  * cpuhp_remove_multi_state - Remove hotplug multi state callback
469 static inline void cpuhp_remove_multi_state(enum cpuhp_state state)  in cpuhp_remove_multi_state()
474 int __cpuhp_state_remove_instance(enum cpuhp_state state,
478  * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
486 static inline int cpuhp_state_remove_instance(enum cpuhp_state state,  in cpuhp_state_remove_instance()
493  * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
500 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,  in cpuhp_state_remove_instance_nocalls()
507 void cpuhp_online_idle(enum cpuhp_state state);
509 static inline void cpuhp_online_idle(enum cpuhp_state state) { }  in cpuhp_online_idle()