| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2013 Huawei Ltd. |
| * Author: Jiang Liu <liuj97@gmail.com> |
| * |
| * 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 */ |
