include/linux/pkeys.h

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