[linux-2.6-block.git] / arch / arm64 / kernel / jump_label.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2013 Huawei Ltd.
 * Author: Jiang Liu <liuj97@gmail.com>
 *
 * Based on arch/arm/kernel/jump_label.c
 */
#include <linux/kernel.h>
#include <linux/jump_label.h>
#include <linux/smp.h>
#include <asm/insn.h>
#include <asm/patching.h>

bool arch_jump_label_transform_queue(struct jump_entry *entry,
				     enum jump_label_type type)
{
	void *addr = (void *)jump_entry_code(entry);
	u32 insn;

	if (type == JUMP_LABEL_JMP) {
		insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry),
						   jump_entry_target(entry),
						   AARCH64_INSN_BRANCH_NOLINK);
	} else {
		insn = aarch64_insn_gen_nop();
	}

	aarch64_insn_patch_text_nosync(addr, insn);
	return true;
}

void arch_jump_label_transform_apply(void)
{
	kick_all_cpus_sync();
}
Commit	Line	Data
caab277b	1	// SPDX-License-Identifier: GPL-2.0-only
9732cafd JL	2	/*
	3	* Copyright (C) 2013 Huawei Ltd.
	4	* Author: Jiang Liu <liuj97@gmail.com>
	5	*
	6	* Based on arch/arm/kernel/jump_label.c
9732cafd JL	7	*/
	8	#include <linux/kernel.h>
	9	#include <linux/jump_label.h>
cfb00a35	10	#include <linux/smp.h>
9732cafd	11	#include <asm/insn.h>
78b92c73	12	#include <asm/patching.h>
9732cafd	13
cfb00a35 WD	14	bool arch_jump_label_transform_queue(struct jump_entry *entry,
cfb00a35 WD	15	enum jump_label_type type)
9732cafd	16	{
c296146c	17	void addr = (void )jump_entry_code(entry);
9732cafd JL	18	u32 insn;
9732cafd JL	19
76b235c6	20	if (type == JUMP_LABEL_JMP) {
c296146c AB	21	insn = aarch64_insn_gen_branch_imm(jump_entry_code(entry),
c296146c AB	22	jump_entry_target(entry),
9732cafd JL	23	AARCH64_INSN_BRANCH_NOLINK);
	24	} else {
	25	insn = aarch64_insn_gen_nop();
	26	}
	27
f6cc0c50	28	aarch64_insn_patch_text_nosync(addr, insn);
cfb00a35 WD	29	return true;
	30	}
	31
	32	void arch_jump_label_transform_apply(void)
	33	{
	34	kick_all_cpus_sync();
9732cafd	35	}