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46 lines
1.5 KiB
46 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (c) 2020 Western Digital Corporation or its affiliates. |
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* Based on arch/arm64/include/asm/cpu_ops.h |
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*/ |
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#ifndef __ASM_CPU_OPS_H |
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#define __ASM_CPU_OPS_H |
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#include <linux/init.h> |
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#include <linux/sched.h> |
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#include <linux/threads.h> |
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/** |
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* struct cpu_operations - Callback operations for hotplugging CPUs. |
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* |
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* @name: Name of the boot protocol. |
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* @cpu_prepare: Early one-time preparation step for a cpu. If there |
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* is a mechanism for doing so, tests whether it is |
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* possible to boot the given HART. |
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* @cpu_start: Boots a cpu into the kernel. |
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* @cpu_disable: Prepares a cpu to die. May fail for some |
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* mechanism-specific reason, which will cause the hot |
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* unplug to be aborted. Called from the cpu to be killed. |
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* @cpu_stop: Makes a cpu leave the kernel. Must not fail. Called from |
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* the cpu being stopped. |
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* @cpu_is_stopped: Ensures a cpu has left the kernel. Called from another |
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* cpu. |
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*/ |
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struct cpu_operations { |
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const char *name; |
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int (*cpu_prepare)(unsigned int cpu); |
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int (*cpu_start)(unsigned int cpu, |
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struct task_struct *tidle); |
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#ifdef CONFIG_HOTPLUG_CPU |
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int (*cpu_disable)(unsigned int cpu); |
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void (*cpu_stop)(void); |
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int (*cpu_is_stopped)(unsigned int cpu); |
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#endif |
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}; |
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extern const struct cpu_operations *cpu_ops[NR_CPUS]; |
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void __init cpu_set_ops(int cpu); |
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void cpu_update_secondary_bootdata(unsigned int cpuid, |
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struct task_struct *tidle); |
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#endif /* ifndef __ASM_CPU_OPS_H */
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