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Diffstat (limited to 'arch/riscv/include/asm/cpu_ops.h')
| -rw-r--r-- | arch/riscv/include/asm/cpu_ops.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/cpu_ops.h b/arch/riscv/include/asm/cpu_ops.h new file mode 100644 index 000000000000..176b570ef982 --- /dev/null +++ b/arch/riscv/include/asm/cpu_ops.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2020 Western Digital Corporation or its affiliates. + * Based on arch/arm64/include/asm/cpu_ops.h + */ +#ifndef __ASM_CPU_OPS_H +#define __ASM_CPU_OPS_H + +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/threads.h> + +/** + * struct cpu_operations - Callback operations for hotplugging CPUs. + * + * @cpu_start: Boots a cpu into the kernel. + * @cpu_stop: Makes a cpu leave the kernel. Must not fail. Called from + * the cpu being stopped. + * @cpu_is_stopped: Ensures a cpu has left the kernel. Called from another + * cpu. + */ +struct cpu_operations { + int (*cpu_start)(unsigned int cpu, + struct task_struct *tidle); +#ifdef CONFIG_HOTPLUG_CPU + void (*cpu_stop)(void); + int (*cpu_is_stopped)(unsigned int cpu); +#endif +}; + +extern const struct cpu_operations cpu_ops_spinwait; +extern const struct cpu_operations *cpu_ops; +void __init cpu_set_ops(void); + +#endif /* ifndef __ASM_CPU_OPS_H */ |