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
13 static inline bool arch_kfence_init_pool(void) { return true; }
14
15 static 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
23 extern bool kfence_early_init;
24 static inline bool arm64_kfence_can_set_direct_map(void)
25 {
26 return !kfence_early_init;
27 }
28 #else /* CONFIG_KFENCE */
29 static inline bool arm64_kfence_can_set_direct_map(void) { return false; }
30 #endif /* CONFIG_KFENCE */
31
32 #endif /* __ASM_KFENCE_H */
33
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