Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature

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Subject: Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
From: Borislav Petkov <bp@xxxxxxx>
Date: Thu, 17 Aug 2017 10:12:08 +0200
Cc: Brijesh Singh <brijesh.singh@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, linux-efi@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, Piotr Luc <piotr.luc@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>, Reza Arbab <arbab@xxxxxxxxxxxxxxxxxx>, David Howells <dhowells@xxxxxxxxxx>, Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>, "Kirill A . Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Laura Abbott <labbott@xxxxxxxxxx>, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Eric Biederman <ebiederm@xxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Dave Airlie <airlied@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Radim Krčmář <rkrcmar@xxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Christoph Lameter <cl@xxxxxxxxx>
In-reply-to: <b2aedd44-ebbc-b196-31d0-0b423f4fa632@amd.com>
References: <20170724190757.11278-1-brijesh.singh@amd.com> <20170724190757.11278-3-brijesh.singh@amd.com> <20170725102657.GD21822@nazgul.tnic> <7236d267-ebcb-8b45-b8d3-5955903e395f@amd.com> <20170725143615.GA26029@nazgul.tnic> <47ccc32e-e113-48e0-d2e0-2f23b37cc452@amd.com> <20170725151301.GC26029@nazgul.tnic> <d6fdba78-034b-d9e2-15ae-00547821a855@amd.com> <20170725153329.GE26029@nazgul.tnic> <b2aedd44-ebbc-b196-31d0-0b423f4fa632@amd.com>
User-agent: NeoMutt/20170113 (1.7.2)

On Wed, Aug 09, 2017 at 01:17:54PM -0500, Tom Lendacky wrote:
> Ok, finally got around to running a 32-bit kernel and it reports
> x86_phys_bits as 48.

So it doesn't really matter on 32-bit. I guess you could add a comment
saying why we don't care.

Thanks.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--

References:
- [RFC Part1 PATCH v3 00/17] x86: Secure Encrypted Virtualization (AMD)
  - From: Brijesh Singh
- [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Brijesh Singh
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Borislav Petkov
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Tom Lendacky
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Borislav Petkov
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Tom Lendacky
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Borislav Petkov
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Tom Lendacky
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Borislav Petkov
- Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
  - From: Tom Lendacky

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