1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_ALTERNATIVE_H 3 #define __ASM_ALTERNATIVE_H 4 5 #include <asm/alternative-macros.h> 6 7 #ifndef __ASSEMBLY__ 8 9 #include <linux/init.h> 10 #include <linux/types.h> 11 #include <linux/stddef.h> 12 13 struct alt_instr { 14 s32 orig_offset; /* offset to original instruction */ 15 s32 alt_offset; /* offset to replacement instruction */ 16 u16 cpufeature; /* cpufeature bit set for replacement */ 17 u8 orig_len; /* size of original instruction(s) */ 18 u8 alt_len; /* size of new instruction(s), <= orig_len */ 19 }; 20 21 typedef void (*alternative_cb_t)(struct alt_instr *alt, 22 __le32 *origptr, __le32 *updptr, int nr_inst); 23 24 void __init apply_boot_alternatives(void); 25 void __init apply_alternatives_all(void); 26 bool alternative_is_applied(u16 cpufeature); 27 28 #ifdef CONFIG_MODULES 29 void apply_alternatives_module(void *start, size_t length); 30 #else 31 static inline void apply_alternatives_module(void *start, size_t length) { } 32 #endif 33 34 #endif /* __ASSEMBLY__ */ 35 #endif /* __ASM_ALTERNATIVE_H */ 36