1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_PKEYS_H 3 #define _LINUX_PKEYS_H 4 5 #include <linux/mm_types.h> 6 #include <asm/mmu_context.h> 7 8 #ifdef CONFIG_ARCH_HAS_PKEYS 9 #include <asm/pkeys.h> 10 #else /* ! CONFIG_ARCH_HAS_PKEYS */ 11 #define arch_max_pkey() (1) 12 #define execute_only_pkey(mm) (0) 13 #define arch_override_mprotect_pkey(vma, prot, pkey) (0) 14 #define PKEY_DEDICATED_EXECUTE_ONLY 0 15 #define ARCH_VM_PKEY_FLAGS 0 16 17 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey) 18 { 19 return (pkey == 0); 20 } 21 22 static inline int mm_pkey_alloc(struct mm_struct *mm) 23 { 24 return -1; 25 } 26 27 static inline int mm_pkey_free(struct mm_struct *mm, int pkey) 28 { 29 return -EINVAL; 30 } 31 32 static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, 33 unsigned long init_val) 34 { 35 return 0; 36 } 37 38 static inline void copy_init_pkru_to_fpregs(void) 39 { 40 } 41 42 #endif /* ! CONFIG_ARCH_HAS_PKEYS */ 43 44 #endif /* _LINUX_PKEYS_H */ 45