| 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__ */ |