arch/x86/include/asm/pkeys.h

   1 #ifndef _ASM_X86_PKEYS_H
   2 #define _ASM_X86_PKEYS_H
   3
   4 #define arch_max_pkey() (boot_cpu_has(X86_FEATURE_OSPKE) ? 16 : 1)
   5
   6 extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
   7                 unsigned long init_val);
   8
   9 /*
  10  * Try to dedicate one of the protection keys to be used as an
  11  * execute-only protection key.
  12  */
  13 #define PKEY_DEDICATED_EXECUTE_ONLY 15
  14 extern int __execute_only_pkey(struct mm_struct *mm);
  15 static inline int execute_only_pkey(struct mm_struct *mm)
  16 {
  17         if (!boot_cpu_has(X86_FEATURE_OSPKE))
  18                 return 0;
  19
  20         return __execute_only_pkey(mm);
  21 }
  22
  23 extern int __arch_override_mprotect_pkey(struct vm_area_struct *vma,
  24                 int prot, int pkey);
  25 static inline int arch_override_mprotect_pkey(struct vm_area_struct *vma,
  26                 int prot, int pkey)
  27 {
  28         if (!boot_cpu_has(X86_FEATURE_OSPKE))
  29                 return 0;
  30
  31         return __arch_override_mprotect_pkey(vma, prot, pkey);
  32 }
  33
  34 #endif /*_ASM_X86_PKEYS_H */