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- /* SPDX-License-Identifier: GPL-2.0-only */
- /*
- * Copyright (C) 2013 Huawei Ltd.
- * Author: Jiang Liu <[email protected]>
- *
- * Based on arch/arm/include/asm/jump_label.h
- */
- #ifndef __ASM_JUMP_LABEL_H
- #define __ASM_JUMP_LABEL_H
- #ifndef __ASSEMBLY__
- #include <linux/types.h>
- #include <asm/insn.h>
- #define JUMP_LABEL_NOP_SIZE AARCH64_INSN_SIZE
- static __always_inline bool arch_static_branch(struct static_key *key,
- bool branch)
- {
- asm_volatile_goto(
- "1: nop \n\t"
- " .pushsection __jump_table, \"aw\" \n\t"
- " .align 3 \n\t"
- " .long 1b - ., %l[l_yes] - . \n\t"
- " .quad %c0 - . \n\t"
- " .popsection \n\t"
- : : "i"(&((char *)key)[branch]) : : l_yes);
- return false;
- l_yes:
- return true;
- }
- static __always_inline bool arch_static_branch_jump(struct static_key *key,
- bool branch)
- {
- asm_volatile_goto(
- "1: b %l[l_yes] \n\t"
- " .pushsection __jump_table, \"aw\" \n\t"
- " .align 3 \n\t"
- " .long 1b - ., %l[l_yes] - . \n\t"
- " .quad %c0 - . \n\t"
- " .popsection \n\t"
- : : "i"(&((char *)key)[branch]) : : l_yes);
- return false;
- l_yes:
- return true;
- }
- #endif /* __ASSEMBLY__ */
- #endif /* __ASM_JUMP_LABEL_H */
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