mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 06:14:39 +01:00
Samuel Holland
62ff262227
RISC-V provides no binding (ACPI or DT) to describe per-cpu start/stop operations, so cpu_set_ops() will always detect the same operations for every CPU. Replace the cpu_ops array with a single pointer to save space and reduce boot time. Signed-off-by: Samuel Holland <[email protected]> Reviewed-by: Conor Dooley <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Palmer Dabbelt <[email protected]>
34 lines
760 B
C
34 lines
760 B
C
// 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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*/
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/of.h>
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#include <linux/string.h>
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#include <linux/sched.h>
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#include <asm/cpu_ops.h>
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#include <asm/cpu_ops_sbi.h>
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#include <asm/sbi.h>
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#include <asm/smp.h>
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const struct cpu_operations *cpu_ops __ro_after_init = &cpu_ops_spinwait;
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extern const struct cpu_operations cpu_ops_sbi;
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#ifndef CONFIG_RISCV_BOOT_SPINWAIT
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const struct cpu_operations cpu_ops_spinwait = {
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.cpu_start = NULL,
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};
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#endif
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void __init cpu_set_ops(void)
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{
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#if IS_ENABLED(CONFIG_RISCV_SBI)
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if (sbi_probe_extension(SBI_EXT_HSM)) {
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pr_info("SBI HSM extension detected\n");
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cpu_ops = &cpu_ops_sbi;
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}
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#endif
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}
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