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1 | #ifndef _LINUX_SMPBOOT_H |
2 | #define _LINUX_SMPBOOT_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
6 | struct task_struct; | |
7 | /* Cookie handed to the thread_fn*/ | |
8 | struct smpboot_thread_data; | |
9 | ||
10 | /** | |
11 | * struct smp_hotplug_thread - CPU hotplug related thread descriptor | |
12 | * @store: Pointer to per cpu storage for the task pointers | |
13 | * @list: List head for core management | |
14 | * @thread_should_run: Check whether the thread should run or not. Called with | |
15 | * preemption disabled. | |
16 | * @thread_fn: The associated thread function | |
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17 | * @create: Optional setup function, called when the thread gets |
18 | * created (Not called from the thread context) | |
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19 | * @setup: Optional setup function, called when the thread gets |
20 | * operational the first time | |
21 | * @cleanup: Optional cleanup function, called when the thread | |
22 | * should stop (module exit) | |
23 | * @park: Optional park function, called when the thread is | |
24 | * parked (cpu offline) | |
25 | * @unpark: Optional unpark function, called when the thread is | |
26 | * unparked (cpu online) | |
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27 | * @pre_unpark: Optional unpark function, called before the thread is |
28 | * unparked (cpu online). This is not guaranteed to be | |
29 | * called on the target cpu of the thread. Careful! | |
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30 | * @cpumask: Internal state. To update which threads are unparked, |
31 | * call smpboot_update_cpumask_percpu_thread(). | |
7d7e499f | 32 | * @selfparking: Thread is not parked by the park function. |
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33 | * @thread_comm: The base name of the thread |
34 | */ | |
35 | struct smp_hotplug_thread { | |
36 | struct task_struct __percpu **store; | |
37 | struct list_head list; | |
38 | int (*thread_should_run)(unsigned int cpu); | |
39 | void (*thread_fn)(unsigned int cpu); | |
7d7e499f | 40 | void (*create)(unsigned int cpu); |
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41 | void (*setup)(unsigned int cpu); |
42 | void (*cleanup)(unsigned int cpu, bool online); | |
43 | void (*park)(unsigned int cpu); | |
44 | void (*unpark)(unsigned int cpu); | |
46c498c2 | 45 | void (*pre_unpark)(unsigned int cpu); |
b5242e98 | 46 | cpumask_var_t cpumask; |
7d7e499f | 47 | bool selfparking; |
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48 | const char *thread_comm; |
49 | }; | |
50 | ||
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51 | int smpboot_register_percpu_thread_cpumask(struct smp_hotplug_thread *plug_thread, |
52 | const struct cpumask *cpumask); | |
53 | ||
54 | static inline int | |
55 | smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread) | |
56 | { | |
57 | return smpboot_register_percpu_thread_cpumask(plug_thread, | |
58 | cpu_possible_mask); | |
59 | } | |
60 | ||
f97f8f06 | 61 | void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread); |
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62 | int smpboot_update_cpumask_percpu_thread(struct smp_hotplug_thread *plug_thread, |
63 | const struct cpumask *); | |
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64 | |
65 | #endif |