diff options
Diffstat (limited to 'arch/riscv/kernel/cpu_ops.c')
-rw-r--r-- | arch/riscv/kernel/cpu_ops.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/riscv/kernel/cpu_ops.c b/arch/riscv/kernel/cpu_ops.c new file mode 100644 index 000000000000..6a8bd8f4db07 --- /dev/null +++ b/arch/riscv/kernel/cpu_ops.c @@ -0,0 +1,33 @@ +// 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 __ro_after_init = &cpu_ops_spinwait; + +extern const struct cpu_operations cpu_ops_sbi; +#ifndef CONFIG_RISCV_BOOT_SPINWAIT +const struct cpu_operations cpu_ops_spinwait = { + .cpu_start = NULL, +}; +#endif + +void __init cpu_set_ops(void) +{ +#if IS_ENABLED(CONFIG_RISCV_SBI) + if (sbi_probe_extension(SBI_EXT_HSM)) { + pr_info("SBI HSM extension detected\n"); + cpu_ops = &cpu_ops_sbi; + } +#endif +} |