41 lines
1 KiB
C
41 lines
1 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _ASM_POWERPC_KUP_H_
|
||
|
|
#define _ASM_POWERPC_KUP_H_
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
#include <asm/pgtable.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
||
|
|
#include <asm/book3s/64/kup-radix.h>
|
||
|
|
#else
|
||
|
|
static inline void allow_user_access(void __user *to, const void __user *from,
|
||
|
|
unsigned long size) { }
|
||
|
|
static inline void prevent_user_access(void __user *to, const void __user *from,
|
||
|
|
unsigned long size) { }
|
||
|
|
#endif /* CONFIG_PPC_BOOK3S_64 */
|
||
|
|
|
||
|
|
static inline void allow_read_from_user(const void __user *from, unsigned long size)
|
||
|
|
{
|
||
|
|
allow_user_access(NULL, from, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void allow_write_to_user(void __user *to, unsigned long size)
|
||
|
|
{
|
||
|
|
allow_user_access(to, NULL, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void prevent_read_from_user(const void __user *from, unsigned long size)
|
||
|
|
{
|
||
|
|
prevent_user_access(NULL, from, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void prevent_write_to_user(void __user *to, unsigned long size)
|
||
|
|
{
|
||
|
|
prevent_user_access(to, NULL, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* !__ASSEMBLY__ */
|
||
|
|
|
||
|
|
#endif /* _ASM_POWERPC_KUP_H_ */
|