| 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/text-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 |