diff options
Diffstat (limited to 'include/linux/mem_encrypt.h')
| -rw-r--r-- | include/linux/mem_encrypt.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/mem_encrypt.h b/include/linux/mem_encrypt.h new file mode 100644 index 000000000..ae4526389 --- /dev/null +++ b/include/linux/mem_encrypt.h @@ -0,0 +1,36 @@ +/* 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__ */ |