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#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
  16static inline int vma_pkey(struct vm_area_struct *vma)
  17{
  18        return 0;
  19}
  20
  21static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
  22{
  23        return (pkey == 0);
  24}
  25
  26static inline int mm_pkey_alloc(struct mm_struct *mm)
  27{
  28        return -1;
  29}
  30
  31static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
  32{
  33        return -EINVAL;
  34}
  35
  36static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
  37                        unsigned long init_val)
  38{
  39        return 0;
  40}
  41
  42static inline bool arch_pkeys_enabled(void)
  43{
  44        return false;
  45}
  46
  47#endif /* ! CONFIG_ARCH_HAS_PKEYS */
  48
  49#endif /* _LINUX_PKEYS_H */
  50