| Tom Lendacky | 7744ccd | 2017-07-17 16:10:03 -0500 | [diff] [blame^] | 1 | /* |
| 2 | * AMD Memory Encryption Support |
| 3 | * |
| 4 | * Copyright (C) 2016 Advanced Micro Devices, Inc. |
| 5 | * |
| 6 | * Author: Tom Lendacky <thomas.lendacky@amd.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #ifndef __MEM_ENCRYPT_H__ |
| 14 | #define __MEM_ENCRYPT_H__ |
| 15 | |
| 16 | #ifndef __ASSEMBLY__ |
| 17 | |
| 18 | #ifdef CONFIG_ARCH_HAS_MEM_ENCRYPT |
| 19 | |
| 20 | #include <asm/mem_encrypt.h> |
| 21 | |
| 22 | #else /* !CONFIG_ARCH_HAS_MEM_ENCRYPT */ |
| 23 | |
| 24 | #define sme_me_mask 0UL |
| 25 | |
| 26 | #endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ |
| 27 | |
| 28 | static inline bool sme_active(void) |
| 29 | { |
| 30 | return !!sme_me_mask; |
| 31 | } |
| 32 | |
| 33 | #endif /* __ASSEMBLY__ */ |
| 34 | |
| 35 | #endif /* __MEM_ENCRYPT_H__ */ |