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