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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f97f8f06 TG |
2 | #ifndef _LINUX_SMPBOOT_H |
3 | #define _LINUX_SMPBOOT_H | |
4 | ||
5 | #include <linux/types.h> | |
6 | ||
7 | struct task_struct; | |
8 | /* Cookie handed to the thread_fn*/ | |
9 | struct smpboot_thread_data; | |
10 | ||
11 | /** | |
12 | * struct smp_hotplug_thread - CPU hotplug related thread descriptor | |
13 | * @store: Pointer to per cpu storage for the task pointers | |
14 | * @list: List head for core management | |
15 | * @thread_should_run: Check whether the thread should run or not. Called with | |
16 | * preemption disabled. | |
17 | * @thread_fn: The associated thread function | |
7d7e499f TG |
18 | * @create: Optional setup function, called when the thread gets |
19 | * created (Not called from the thread context) | |
f97f8f06 TG |
20 | * @setup: Optional setup function, called when the thread gets |
21 | * operational the first time | |
22 | * @cleanup: Optional cleanup function, called when the thread | |
23 | * should stop (module exit) | |
24 | * @park: Optional park function, called when the thread is | |
25 | * parked (cpu offline) | |
26 | * @unpark: Optional unpark function, called when the thread is | |
27 | * unparked (cpu online) | |
b5242e98 CM |
28 | * @cpumask: Internal state. To update which threads are unparked, |
29 | * call smpboot_update_cpumask_percpu_thread(). | |
7d7e499f | 30 | * @selfparking: Thread is not parked by the park function. |
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31 | * @thread_comm: The base name of the thread |
32 | */ | |
33 | struct smp_hotplug_thread { | |
34 | struct task_struct __percpu **store; | |
35 | struct list_head list; | |
36 | int (*thread_should_run)(unsigned int cpu); | |
37 | void (*thread_fn)(unsigned int cpu); | |
7d7e499f | 38 | void (*create)(unsigned int cpu); |
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39 | void (*setup)(unsigned int cpu); |
40 | void (*cleanup)(unsigned int cpu, bool online); | |
41 | void (*park)(unsigned int cpu); | |
42 | void (*unpark)(unsigned int cpu); | |
b5242e98 | 43 | cpumask_var_t cpumask; |
7d7e499f | 44 | bool selfparking; |
f97f8f06 TG |
45 | const char *thread_comm; |
46 | }; | |
47 | ||
230ec939 FW |
48 | int smpboot_register_percpu_thread_cpumask(struct smp_hotplug_thread *plug_thread, |
49 | const struct cpumask *cpumask); | |
50 | ||
51 | static inline int | |
52 | smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread) | |
53 | { | |
54 | return smpboot_register_percpu_thread_cpumask(plug_thread, | |
55 | cpu_possible_mask); | |
56 | } | |
57 | ||
f97f8f06 | 58 | void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread); |
0d85923c TG |
59 | void smpboot_update_cpumask_percpu_thread(struct smp_hotplug_thread *plug_thread, |
60 | const struct cpumask *); | |
f97f8f06 TG |
61 | |
62 | #endif |