include/linux/pkeys.h

   1 #ifndef _LINUX_PKEYS_H
   2 #define _LINUX_PKEYS_H
   3
   4 #include <linux/mm_types.h>
   5 #include <asm/mmu_context.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 bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
  17 {
  18         return (pkey == 0);
  19 }
  20
  21 static inline int mm_pkey_alloc(struct mm_struct *mm)
  22 {
  23         return -1;
  24 }
  25
  26 static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
  27 {
  28         return -EINVAL;
  29 }
  30
  31 static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
  32                         unsigned long init_val)
  33 {
  34         return 0;
  35 }
  36
  37 static inline void copy_init_pkru_to_fpregs(void)
  38 {
  39 }
  40
  41 #endif /* ! CONFIG_ARCH_HAS_PKEYS */
  42
  43 #endif /* _LINUX_PKEYS_H */