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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
7744ccdb TL |
2 | /* |
3 | * AMD Memory Encryption Support | |
4 | * | |
5 | * Copyright (C) 2016 Advanced Micro Devices, Inc. | |
6 | * | |
7 | * Author: Tom Lendacky <thomas.lendacky@amd.com> | |
7744ccdb TL |
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 | #else /* !CONFIG_ARCH_HAS_MEM_ENCRYPT */ | |
20 | ||
284e21fa | 21 | static inline bool mem_encrypt_active(void) { return false; } |
d8aa7eea | 22 | |
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23 | #endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ |
24 | ||
21d9bb4a | 25 | #ifdef CONFIG_AMD_MEM_ENCRYPT |
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26 | /* |
27 | * The __sme_set() and __sme_clr() macros are useful for adding or removing | |
28 | * the encryption mask from a value (e.g. when dealing with pagetable | |
29 | * entries). | |
30 | */ | |
21d9bb4a BP |
31 | #define __sme_set(x) ((x) | sme_me_mask) |
32 | #define __sme_clr(x) ((x) & ~sme_me_mask) | |
33 | #else | |
34 | #define __sme_set(x) (x) | |
35 | #define __sme_clr(x) (x) | |
36 | #endif | |
21729f81 | 37 | |
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38 | #endif /* __ASSEMBLY__ */ |
39 | ||
40 | #endif /* __MEM_ENCRYPT_H__ */ |