diff options
Diffstat (limited to 'arch/riscv/kernel/cpu_ops.c')
| -rw-r--r-- | arch/riscv/kernel/cpu_ops.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/riscv/kernel/cpu_ops.c b/arch/riscv/kernel/cpu_ops.c new file mode 100644 index 0000000000..eb479a88a9 --- /dev/null +++ b/arch/riscv/kernel/cpu_ops.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020 Western Digital Corporation or its affiliates. + */ + +#include <linux/errno.h> +#include <linux/mm.h> +#include <linux/of.h> +#include <linux/string.h> +#include <linux/sched.h> +#include <asm/cpu_ops.h> +#include <asm/cpu_ops_sbi.h> +#include <asm/sbi.h> +#include <asm/smp.h> + +const struct cpu_operations *cpu_ops[NR_CPUS] __ro_after_init; + +extern const struct cpu_operations cpu_ops_sbi; +#ifndef CONFIG_RISCV_BOOT_SPINWAIT +const struct cpu_operations cpu_ops_spinwait = { + .name = "", + .cpu_prepare = NULL, + .cpu_start = NULL, +}; +#endif + +void __init cpu_set_ops(int cpuid) +{ +#if IS_ENABLED(CONFIG_RISCV_SBI) + if (sbi_probe_extension(SBI_EXT_HSM)) { + if (!cpuid) + pr_info("SBI HSM extension detected\n"); + cpu_ops[cpuid] = &cpu_ops_sbi; + } else +#endif + cpu_ops[cpuid] = &cpu_ops_spinwait; +} |