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