projects / mirror_ubuntu-eoan-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 21d9bb4a | 21 | #define sme_me_mask 0ULL |
| 7744ccdb | 22 | |
| d8aa7eea TL |
23 | static inline bool sme_active(void) { return false; } |
| 24 | static inline bool sev_active(void) { return false; } | |
| 25 | ||
| 7744ccdb TL |
26 | #endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ |
| 27 | ||
| d8aa7eea | 28 | static inline bool mem_encrypt_active(void) |
| 7744ccdb | 29 | { |
| d8aa7eea | 30 | return sme_me_mask; |
| 7744ccdb TL |
31 | } |
| 32 | ||
| 21d9bb4a | 33 | static inline u64 sme_get_me_mask(void) |
| 5868f365 TL |
34 | { |
| 35 | return sme_me_mask; | |
| 36 | } | |
| 37 | ||
| 21d9bb4a | 38 | #ifdef CONFIG_AMD_MEM_ENCRYPT |
| 21729f81 TL |
39 | /* |
| 40 | * The __sme_set() and __sme_clr() macros are useful for adding or removing | |
| 41 | * the encryption mask from a value (e.g. when dealing with pagetable | |
| 42 | * entries). | |
| 43 | */ | |
| 21d9bb4a BP |
44 | #define __sme_set(x) ((x) | sme_me_mask) |
| 45 | #define __sme_clr(x) ((x) & ~sme_me_mask) | |
| 46 | #else | |
| 47 | #define __sme_set(x) (x) | |
| 48 | #define __sme_clr(x) (x) | |
| 49 | #endif | |
| 21729f81 | 50 | |
| 7744ccdb TL |
51 | #endif /* __ASSEMBLY__ */ |
| 52 | ||
| 53 | #endif /* __MEM_ENCRYPT_H__ */ |