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