1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * Copyright (C) 2013 Huawei Ltd. |
4 | * Author: Jiang Liu <liuj97@gmail.com> |
5 | * |
6 | * Based on arch/arm/kernel/jump_label.c |
7 | */ |
8 | #include <linux/kernel.h> |
9 | #include <linux/jump_label.h> |
10 | #include <asm/insn.h> |
11 | #include <asm/patching.h> |
12 | |
13 | void arch_jump_label_transform(struct jump_entry *entry, |
14 | enum jump_label_type type) |
15 | { |
16 | void *addr = (void *)jump_entry_code(entry); |
17 | u32 insn; |
18 | |
19 | if (type == JUMP_LABEL_JMP) { |
20 | insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry), |
21 | jump_entry_target(entry), |
22 | AARCH64_INSN_BRANCH_NOLINK); |
23 | } else { |
24 | insn = aarch64_insn_gen_nop(); |
25 | } |
26 | |
27 | aarch64_insn_patch_text_nosync(addr, insn); |
28 | } |
29 |