Messages in this thread | | | Subject | Re: [RFC PATCH v4 05/28] x86: Add Secure Memory Encryption (SME) support | From | Tom Lendacky <> | Date | Tue, 28 Feb 2017 17:01:36 -0600 |
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On 2/25/2017 9:29 AM, Borislav Petkov wrote: > On Thu, Feb 16, 2017 at 09:43:07AM -0600, Tom Lendacky wrote: >> Add support for Secure Memory Encryption (SME). This initial support >> provides a Kconfig entry to build the SME support into the kernel and >> defines the memory encryption mask that will be used in subsequent >> patches to mark pages as encrypted. >> >> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> > > ... > >> +++ b/arch/x86/include/asm/mem_encrypt.h >> @@ -0,0 +1,42 @@ >> +/* >> + * AMD Memory Encryption Support >> + * >> + * Copyright (C) 2016 Advanced Micro Devices, Inc. >> + * >> + * Author: Tom Lendacky <thomas.lendacky@amd.com> >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#ifndef __X86_MEM_ENCRYPT_H__ >> +#define __X86_MEM_ENCRYPT_H__ >> + >> +#ifndef __ASSEMBLY__ >> + >> +#ifdef CONFIG_AMD_MEM_ENCRYPT >> + >> +extern unsigned long sme_me_mask; >> + >> +static inline bool sme_active(void) >> +{ >> + return (sme_me_mask) ? true : false; > > return !!sme_me_mask;
Done.
Thanks, Tom
>
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