1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _LINUX_PKEYS_H
3*4882a593Smuzhiyun #define _LINUX_PKEYS_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/mm.h>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifdef CONFIG_ARCH_HAS_PKEYS
8*4882a593Smuzhiyun #include <asm/pkeys.h>
9*4882a593Smuzhiyun #else /* ! CONFIG_ARCH_HAS_PKEYS */
10*4882a593Smuzhiyun #define arch_max_pkey() (1)
11*4882a593Smuzhiyun #define execute_only_pkey(mm) (0)
12*4882a593Smuzhiyun #define arch_override_mprotect_pkey(vma, prot, pkey) (0)
13*4882a593Smuzhiyun #define PKEY_DEDICATED_EXECUTE_ONLY 0
14*4882a593Smuzhiyun #define ARCH_VM_PKEY_FLAGS 0
15*4882a593Smuzhiyun
vma_pkey(struct vm_area_struct * vma)16*4882a593Smuzhiyun static inline int vma_pkey(struct vm_area_struct *vma)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun return 0;
19*4882a593Smuzhiyun }
20*4882a593Smuzhiyun
mm_pkey_is_allocated(struct mm_struct * mm,int pkey)21*4882a593Smuzhiyun static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun return (pkey == 0);
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
mm_pkey_alloc(struct mm_struct * mm)26*4882a593Smuzhiyun static inline int mm_pkey_alloc(struct mm_struct *mm)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun return -1;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
mm_pkey_free(struct mm_struct * mm,int pkey)31*4882a593Smuzhiyun static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun return -EINVAL;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
arch_set_user_pkey_access(struct task_struct * tsk,int pkey,unsigned long init_val)36*4882a593Smuzhiyun static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
37*4882a593Smuzhiyun unsigned long init_val)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun return 0;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
arch_pkeys_enabled(void)42*4882a593Smuzhiyun static inline bool arch_pkeys_enabled(void)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun return false;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
copy_init_pkru_to_fpregs(void)47*4882a593Smuzhiyun static inline void copy_init_pkru_to_fpregs(void)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun #endif /* ! CONFIG_ARCH_HAS_PKEYS */
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun #endif /* _LINUX_PKEYS_H */
54