2023-08-30 17:31:07 +02:00
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_ALTERNATIVE_H
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#define __ASM_ALTERNATIVE_H
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#include <asm/alternative-macros.h>
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#ifndef __ASSEMBLY__
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/stddef.h>
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struct alt_instr {
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s32 orig_offset; /* offset to original instruction */
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s32 alt_offset; /* offset to replacement instruction */
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2023-10-24 12:59:35 +02:00
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u16 cpucap; /* cpucap bit set for replacement */
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2023-08-30 17:31:07 +02:00
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u8 orig_len; /* size of original instruction(s) */
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u8 alt_len; /* size of new instruction(s), <= orig_len */
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};
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typedef void (*alternative_cb_t)(struct alt_instr *alt,
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__le32 *origptr, __le32 *updptr, int nr_inst);
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void __init apply_boot_alternatives(void);
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void __init apply_alternatives_all(void);
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2023-10-24 12:59:35 +02:00
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bool alternative_is_applied(u16 cpucap);
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2023-08-30 17:31:07 +02:00
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#ifdef CONFIG_MODULES
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void apply_alternatives_module(void *start, size_t length);
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#else
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static inline void apply_alternatives_module(void *start, size_t length) { }
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#endif
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2023-10-24 12:59:35 +02:00
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void alt_cb_patch_nops(struct alt_instr *alt, __le32 *origptr,
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__le32 *updptr, int nr_inst);
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2023-08-30 17:31:07 +02:00
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_ALTERNATIVE_H */
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