Merge tag 'mm-stable-2022-08-09' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / include / linux / mem_encrypt.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * AMD Memory Encryption Support
4  *
5  * Copyright (C) 2016 Advanced Micro Devices, Inc.
6  *
7  * Author: Tom Lendacky <thomas.lendacky@amd.com>
8  */
9
10 #ifndef __MEM_ENCRYPT_H__
11 #define __MEM_ENCRYPT_H__
12
13 #ifndef __ASSEMBLY__
14
15 #ifdef CONFIG_ARCH_HAS_MEM_ENCRYPT
16
17 #include <asm/mem_encrypt.h>
18
19 #endif  /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
20
21 #ifdef CONFIG_AMD_MEM_ENCRYPT
22 /*
23  * The __sme_set() and __sme_clr() macros are useful for adding or removing
24  * the encryption mask from a value (e.g. when dealing with pagetable
25  * entries).
26  */
27 #define __sme_set(x)            ((x) | sme_me_mask)
28 #define __sme_clr(x)            ((x) & ~sme_me_mask)
29 #else
30 #define __sme_set(x)            (x)
31 #define __sme_clr(x)            (x)
32 #endif
33
34 #endif  /* __ASSEMBLY__ */
35
36 #endif  /* __MEM_ENCRYPT_H__ */