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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960/* 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)
#define dma_addr_encrypted(x) __sme_set(x)#define dma_addr_canonical(x) __sme_clr(x)
#else#define __sme_set(x) (x)#define __sme_clr(x) (x)#endif
/* * dma_addr_encrypted() and dma_addr_unencrypted() are for converting a given DMA * address to the respective type of addressing. * * dma_addr_canonical() is used to reverse any conversions for encrypted/decrypted * back to the canonical address. */#ifndef dma_addr_encrypted#define dma_addr_encrypted(x) (x)#endif
#ifndef dma_addr_unencrypted#define dma_addr_unencrypted(x) (x)#endif
#ifndef dma_addr_canonical#define dma_addr_canonical(x) (x)#endif
#endif /* __ASSEMBLY__ */
#endif /* __MEM_ENCRYPT_H__ */