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_types.h>
   6#include <asm/mmu_context.h>
   7
   8#ifdef CONFIG_ARCH_HAS_PKEYS
   9#include <asm/pkeys.h>
  10#else /* ! CONFIG_ARCH_HAS_PKEYS */
  11#define arch_max_pkey() (1)
  12#define execute_only_pkey(mm) (0)
  13#define arch_override_mprotect_pkey(vma, prot, pkey) (0)
  14#define PKEY_DEDICATED_EXECUTE_ONLY 0
  15#define ARCH_VM_PKEY_FLAGS 0
  16
  17static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
  18{
  19        return (pkey == 0);
  20}
  21
  22static inline int mm_pkey_alloc(struct mm_struct *mm)
  23{
  24        return -1;
  25}
  26
  27static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
  28{
  29        return -EINVAL;
  30}
  31
  32static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
  33                        unsigned long init_val)
  34{
  35        return 0;
  36}
  37
  38static inline void copy_init_pkru_to_fpregs(void)
  39{
  40}
  41
  42#endif /* ! CONFIG_ARCH_HAS_PKEYS */
  43
  44#endif /* _LINUX_PKEYS_H */
  45