1 // SPDX-License-Identifier: GPL-2.0-only
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 <linux/smp.h>
11 #include <asm/insn.h>
12 #include <asm/patching.h>
13
14 bool arch_jump_label_transform_queue(struct jump_entry *entry,
15 enum jump_label_type type)
16 {
17 void *addr = (void *)jump_entry_code(entry);
18 u32 insn;
19
20 if (type == JUMP_LABEL_JMP) {
21 insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry),
22 jump_entry_target(entry),
23 AARCH64_INSN_BRANCH_NOLINK);
24 } else {
25 insn = aarch64_insn_gen_nop();
26 }
27
28 aarch64_insn_patch_text_nosync(addr, insn);
29 return true;
30 }
31
32 void arch_jump_label_transform_apply(void)
33 {
34 kick_all_cpus_sync();
35 }
36
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