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 */ 35