1 #ifndef _ASM_X86_PKEYS_H
2 #define _ASM_X86_PKEYS_H
4 #define PKEY_DEDICATED_EXECUTE_ONLY 15
6 * Consider the PKEY_DEDICATED_EXECUTE_ONLY key unavailable.
8 #define arch_max_pkey() (boot_cpu_has(X86_FEATURE_OSPKE) ? \
9 PKEY_DEDICATED_EXECUTE_ONLY : 1)
11 extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
12 unsigned long init_val);
15 * Try to dedicate one of the protection keys to be used as an
16 * execute-only protection key.
18 extern int __execute_only_pkey(struct mm_struct *mm);
19 static inline int execute_only_pkey(struct mm_struct *mm)
21 if (!boot_cpu_has(X86_FEATURE_OSPKE))
24 return __execute_only_pkey(mm);
27 extern int __arch_override_mprotect_pkey(struct vm_area_struct *vma,
29 static inline int arch_override_mprotect_pkey(struct vm_area_struct *vma,
32 if (!boot_cpu_has(X86_FEATURE_OSPKE))
35 return __arch_override_mprotect_pkey(vma, prot, pkey);
38 extern int __arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
39 unsigned long init_val);
41 #define ARCH_VM_PKEY_FLAGS (VM_PKEY_BIT0 | VM_PKEY_BIT1 | VM_PKEY_BIT2 | VM_PKEY_BIT3)
43 #endif /*_ASM_X86_PKEYS_H */