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Subject: Re: [PATCH v2 02/12] mm: Introduce a function to check for
 virtualization protection features
To:     Borislav Petkov <bp@alien8.de>
Cc:     linux-kernel@vger.kernel.org, x86@kernel.org,
        linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
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        Andi Kleen <ak@linux.intel.com>,
        Sathyanarayanan Kuppuswamy 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        Tianyu Lan <Tianyu.Lan@microsoft.com>,
        Joerg Roedel <jroedel@suse.de>
References: <cover.1628873970.git.thomas.lendacky@amd.com>
 <482fe51f1671c1cd081039801b03db7ec0036332.1628873970.git.thomas.lendacky@amd.com>
 <YRgMUHqdH60jDB06@zn.tnic>
From:   Tom Lendacky <thomas.lendacky@amd.com>
Message-ID: <9279dcd1-ccd9-c187-1b95-8934d1bf298c@amd.com>
Date:   Sat, 14 Aug 2021 13:49:20 -0500
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On 8/14/21 1:32 PM, Borislav Petkov wrote:
> On Fri, Aug 13, 2021 at 11:59:21AM -0500, Tom Lendacky wrote:
>> diff --git a/include/linux/protected_guest.h b/include/linux/protected_guest.h
>> new file mode 100644
>> index 000000000000..43d4dde94793
>> --- /dev/null
>> +++ b/include/linux/protected_guest.h
>> @@ -0,0 +1,35 @@
>> +/* SPDX-License-Identifier: GPL-2.0-only */
>> +/*
>> + * Protected Guest (and Host) Capability checks
>> + *
>> + * Copyright (C) 2021 Advanced Micro Devices, Inc.
>> + *
>> + * Author: Tom Lendacky <thomas.lendacky@amd.com>
>> + */
>> +
>> +#ifndef _PROTECTED_GUEST_H
>> +#define _PROTECTED_GUEST_H
>> +
>> +#ifndef __ASSEMBLY__
> 	   ^^^^^^^^^^^^^
> 
> Do you really need that guard? It builds fine without it too. Or
> something coming later does need it...?

No, I probably did it out of habit. I can remove it in the next version.

Thanks,
Tom

>