1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_PKEYS_H
3 #define _LINUX_PKEYS_H
4
5 #include <linux/mm.h>
6
7 #ifdef CONFIG_ARCH_HAS_PKEYS
8 #include <asm/pkeys.h>
9 #else /* ! CONFIG_ARCH_HAS_PKEYS */
10 #define arch_max_pkey() (1)
11 #define execute_only_pkey(mm) (0)
12 #define arch_override_mprotect_pkey(vma, prot, pkey) (0)
13 #define PKEY_DEDICATED_EXECUTE_ONLY 0
14 #define ARCH_VM_PKEY_FLAGS 0
15
vma_pkey(struct vm_area_struct * vma)16 static inline int vma_pkey(struct vm_area_struct *vma)
17 {
18 return 0;
19 }
20
mm_pkey_is_allocated(struct mm_struct * mm,int pkey)21 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
22 {
23 return (pkey == 0);
24 }
25
mm_pkey_alloc(struct mm_struct * mm)26 static inline int mm_pkey_alloc(struct mm_struct *mm)
27 {
28 return -1;
29 }
30
mm_pkey_free(struct mm_struct * mm,int pkey)31 static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
32 {
33 return -EINVAL;
34 }
35
arch_set_user_pkey_access(struct task_struct * tsk,int pkey,unsigned long init_val)36 static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
37 unsigned long init_val)
38 {
39 return 0;
40 }
41
arch_pkeys_enabled(void)42 static inline bool arch_pkeys_enabled(void)
43 {
44 return false;
45 }
46
copy_init_pkru_to_fpregs(void)47 static inline void copy_init_pkru_to_fpregs(void)
48 {
49 }
50
51 #endif /* ! CONFIG_ARCH_HAS_PKEYS */
52
53 #endif /* _LINUX_PKEYS_H */
54