Linux kernel mirror (for testing)
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1#ifndef __CPUHOTPLUG_H
2#define __CPUHOTPLUG_H
3
4enum cpuhp_state {
5 CPUHP_OFFLINE,
6 CPUHP_CREATE_THREADS,
7 CPUHP_NOTIFY_PREPARE,
8 CPUHP_BRINGUP_CPU,
9 CPUHP_AP_IDLE_DEAD,
10 CPUHP_AP_OFFLINE,
11 CPUHP_AP_NOTIFY_STARTING,
12 CPUHP_AP_ONLINE,
13 CPUHP_TEARDOWN_CPU,
14 CPUHP_AP_ONLINE_IDLE,
15 CPUHP_AP_SMPBOOT_THREADS,
16 CPUHP_AP_NOTIFY_ONLINE,
17 CPUHP_AP_ONLINE_DYN,
18 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
19 CPUHP_ONLINE,
20};
21
22int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
23 int (*startup)(unsigned int cpu),
24 int (*teardown)(unsigned int cpu));
25
26/**
27 * cpuhp_setup_state - Setup hotplug state callbacks with calling the callbacks
28 * @state: The state for which the calls are installed
29 * @name: Name of the callback (will be used in debug output)
30 * @startup: startup callback function
31 * @teardown: teardown callback function
32 *
33 * Installs the callback functions and invokes the startup callback on
34 * the present cpus which have already reached the @state.
35 */
36static inline int cpuhp_setup_state(enum cpuhp_state state,
37 const char *name,
38 int (*startup)(unsigned int cpu),
39 int (*teardown)(unsigned int cpu))
40{
41 return __cpuhp_setup_state(state, name, true, startup, teardown);
42}
43
44/**
45 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
46 * callbacks
47 * @state: The state for which the calls are installed
48 * @name: Name of the callback.
49 * @startup: startup callback function
50 * @teardown: teardown callback function
51 *
52 * Same as @cpuhp_setup_state except that no calls are executed are invoked
53 * during installation of this callback. NOP if SMP=n or HOTPLUG_CPU=n.
54 */
55static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
56 const char *name,
57 int (*startup)(unsigned int cpu),
58 int (*teardown)(unsigned int cpu))
59{
60 return __cpuhp_setup_state(state, name, false, startup, teardown);
61}
62
63void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
64
65/**
66 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
67 * @state: The state for which the calls are removed
68 *
69 * Removes the callback functions and invokes the teardown callback on
70 * the present cpus which have already reached the @state.
71 */
72static inline void cpuhp_remove_state(enum cpuhp_state state)
73{
74 __cpuhp_remove_state(state, true);
75}
76
77/**
78 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
79 * teardown
80 * @state: The state for which the calls are removed
81 */
82static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
83{
84 __cpuhp_remove_state(state, false);
85}
86
87#ifdef CONFIG_SMP
88void cpuhp_online_idle(enum cpuhp_state state);
89#else
90static inline void cpuhp_online_idle(enum cpuhp_state state) { }
91#endif
92
93#endif