xref: /linux/arch/arm64/include/asm/kfence.h (revision 24172e0d79900908cf5ebf366600616d29c9b417) 
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 
kfence_protect_page(unsigned long addr,bool protect)13 static inline bool kfence_protect_page(unsigned long addr, bool protect)
14 {
15 	set_memory_valid(addr, 1, !protect);
16 
17 	return true;
18 }
19 
20 #ifdef CONFIG_KFENCE
21 extern bool kfence_early_init;
arm64_kfence_can_set_direct_map(void)22 static inline bool arm64_kfence_can_set_direct_map(void)
23 {
24 	return !kfence_early_init;
25 }
26 bool arch_kfence_init_pool(void);
27 #else /* CONFIG_KFENCE */
arm64_kfence_can_set_direct_map(void)28 static inline bool arm64_kfence_can_set_direct_map(void) { return false; }
29 #endif /* CONFIG_KFENCE */
30 
31 #endif /* __ASM_KFENCE_H */
32