1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_PKEYS_H 3 #define _LINUX_PKEYS_H 4 5 #include <linux/mm.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 int vma_pkey(struct vm_area_struct *vma) 17 { 18 return 0; 19 } 20 21 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey) 22 { 23 return (pkey == 0); 24 } 25 26 static inline int mm_pkey_alloc(struct mm_struct *mm) 27 { 28 return -1; 29 } 30 31 static inline int mm_pkey_free(struct mm_struct *mm, int pkey) 32 { 33 return -EINVAL; 34 } 35 36 static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, 37 unsigned long init_val) 38 { 39 return 0; 40 } 41 42 static inline bool arch_pkeys_enabled(void) 43 { 44 return false; 45 } 46 47 static inline void copy_init_pkru_to_fpregs(void) 48 { 49 } 50 51 #endif /* ! CONFIG_ARCH_HAS_PKEYS */ 52 53 #endif /* _LINUX_PKEYS_H */ 54