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 #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
  16 static inline int vma_pkey(struct vm_area_struct *vma)
  17 {
  18         return 0;
  19 }
  20
  21 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
  22 {
  23         return (pkey == 0);
  24 }
  25
  26 static inline int mm_pkey_alloc(struct mm_struct *mm)
  27 {
  28         return -1;
  29 }
  30
  31 static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
  32 {
  33         return -EINVAL;
  34 }
  35
  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
  42 static inline bool arch_pkeys_enabled(void)
  43 {
  44         return false;
  45 }
  46
  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 */