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__ */ |
37 | |