284e21fab2
Now that generic code doesn't reference them, move sme_active() and sme_me_mask to x86's <asm/mem_encrypt.h>. Also remove the export for sme_active() since it's only used in files that won't be built as modules. sme_me_mask on the other hand is used in arch/x86/kvm/svm.c (via __sme_set() and __psp_pa()) which can be built as a module so its export needs to stay. Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190806044919.10622-5-bauerman@linux.ibm.com
42 lines
939 B
C
42 lines
939 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* AMD Memory Encryption Support
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*
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* Copyright (C) 2016 Advanced Micro Devices, Inc.
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*
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* Author: Tom Lendacky <thomas.lendacky@amd.com>
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*/
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#ifndef __MEM_ENCRYPT_H__
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#define __MEM_ENCRYPT_H__
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_ARCH_HAS_MEM_ENCRYPT
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#include <asm/mem_encrypt.h>
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#else /* !CONFIG_ARCH_HAS_MEM_ENCRYPT */
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static inline bool mem_encrypt_active(void) { return false; }
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static inline bool sev_active(void) { return false; }
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#endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */
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#ifdef CONFIG_AMD_MEM_ENCRYPT
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/*
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* The __sme_set() and __sme_clr() macros are useful for adding or removing
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* the encryption mask from a value (e.g. when dealing with pagetable
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* entries).
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*/
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#define __sme_set(x) ((x) | sme_me_mask)
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#define __sme_clr(x) ((x) & ~sme_me_mask)
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#else
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#define __sme_set(x) (x)
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#define __sme_clr(x) (x)
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __MEM_ENCRYPT_H__ */
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