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Groups > linux.kernel > #1695832

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

From Borislav Petkov <bp@suse.de>
Newsgroups linux.kernel
Subject Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted Virtualization CPU feature
Date 2017-07-25 17:20 +0200
Message-ID <u79MS-4rG-15@gated-at.bofh.it> (permalink)
References (1 earlier) <u75gd-1yO-3@gated-at.bofh.it> <u75gd-1yO-1@gated-at.bofh.it> <u79aa-3YE-19@gated-at.bofh.it> <u79aa-3YE-17@gated-at.bofh.it> <u79MS-4rG-17@gated-at.bofh.it>
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On Tue, Jul 25, 2017 at 09:58:54AM -0500, Tom Lendacky wrote:
> True, but it is more about being accurate and making sure the value is
> correct where ever it may be used.

So early_identify_cpu() initializes phys_bits to 32 on 32-bit.
Subtracting it there would actually make actively it wrong, AFAICT.

-- 
Regards/Gruss,
    Boris.

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

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Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 12:30 +0200
  Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 16:40 +0200
    Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 17:20 +0200
      Re: [RFC Part1 PATCH v3 02/17] x86/CPU/AMD: Add the Secure Encrypted  Virtualization CPU feature Borislav Petkov <bp@suse.de> - 2017-07-25 17:40 +0200

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