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