| /* SPDX-License-Identifier: GPL-2.0-only */ | |
| /* | |
| * AMD Memory Encryption Support | |
| * | |
| * Copyright (C) 2016 Advanced Micro Devices, Inc. | |
| * | |
| * Author: Tom Lendacky <thomas.lendacky@amd.com> | |
| */ | |
| #ifndef __MEM_ENCRYPT_H__ | |
| #define __MEM_ENCRYPT_H__ | |
| #ifndef __ASSEMBLY__ | |
| #ifdef CONFIG_ARCH_HAS_MEM_ENCRYPT | |
| #include <asm/mem_encrypt.h> | |
| #endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ | |
| #ifdef CONFIG_AMD_MEM_ENCRYPT | |
| /* | |
| * The __sme_set() and __sme_clr() macros are useful for adding or removing | |
| * the encryption mask from a value (e.g. when dealing with pagetable | |
| * entries). | |
| */ | |
| #define __sme_set(x) ((x) | sme_me_mask) | |
| #define __sme_clr(x) ((x) & ~sme_me_mask) | |
| #else | |
| #define __sme_set(x) (x) | |
| #define __sme_clr(x) (x) | |
| #endif | |
| #endif /* __ASSEMBLY__ */ | |
| #endif /* __MEM_ENCRYPT_H__ */ |