LXR linux/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
  18static inline int vma_pkey(struct vm_area_struct *vma)
  19{
  20        return 0;
  21}
  22
  23static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
  24{
  25        return (pkey == 0);
  26}
  27
  28static inline int mm_pkey_alloc(struct mm_struct *mm)
  29{
  30        return -1;
  31}
  32
  33static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
  34{
  35        return -EINVAL;
  36}
  37
  38static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
  39                        unsigned long init_val)
  40{
  41        return 0;
  42}
  43
  44static inline bool arch_pkeys_enabled(void)
  45{
  46        return false;
  47}
  48
  49#endif /* ! CONFIG_ARCH_HAS_PKEYS */
  50
  51#endif /* _LINUX_PKEYS_H */
  52