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52 lines
1003 B
C
52 lines
1003 B
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* PowerPC Memory Protection Keys management
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*
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* Copyright 2017, Ram Pai, IBM Corporation.
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*/
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#ifndef _ASM_POWERPC_KEYS_H
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#define _ASM_POWERPC_KEYS_H
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#include <linux/jump_label.h>
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DECLARE_STATIC_KEY_TRUE(pkey_disabled);
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#define ARCH_VM_PKEY_FLAGS 0
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static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
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{
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return false;
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}
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static inline int mm_pkey_alloc(struct mm_struct *mm)
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{
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return -1;
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}
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static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
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{
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return -EINVAL;
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}
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/*
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* Try to dedicate one of the protection keys to be used as an
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* execute-only protection key.
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*/
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static inline int execute_only_pkey(struct mm_struct *mm)
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{
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return 0;
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}
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static inline int arch_override_mprotect_pkey(struct vm_area_struct *vma,
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int prot, int pkey)
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{
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return 0;
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}
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static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
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unsigned long init_val)
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{
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return 0;
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}
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#endif /*_ASM_POWERPC_KEYS_H */
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