1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * arm64 KFENCE support.
4 *
5 * Copyright (C) 2020, Google LLC.
6 */
7
8#ifndef __ASM_KFENCE_H
9#define __ASM_KFENCE_H
10
11#include <asm/set_memory.h>
12
13static inline bool arch_kfence_init_pool(void) { return true; }
14
15static inline bool kfence_protect_page(unsigned long addr, bool protect)
16{
17	set_memory_valid(addr, 1, !protect);
18
19	return true;
20}
21
22#ifdef CONFIG_KFENCE
23extern bool kfence_early_init;
24static inline bool arm64_kfence_can_set_direct_map(void)
25{
26	return !kfence_early_init;
27}
28#else /* CONFIG_KFENCE */
29static inline bool arm64_kfence_can_set_direct_map(void) { return false; }
30#endif /* CONFIG_KFENCE */
31
32#endif /* __ASM_KFENCE_H */
33