linux-kernel - Re: [PATCHv7 05/14] x86/boot: Add infrastructure required for unaccepted memory support

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Message-ID: <YtRD8MJGTJLzRRV2@zn.tnic>
Date:   Sun, 17 Jul 2022 19:16:32 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Sean Christopherson <seanjc@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Joerg Roedel <jroedel@...e.de>,
        Ard Biesheuvel <ardb@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Tom Lendacky <thomas.lendacky@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        Varad Gautam <varad.gautam@...e.com>,
        Dario Faggioli <dfaggioli@...e.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Mike Rapoport <rppt@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        marcelo.cerri@...onical.com, tim.gardner@...onical.com,
        khalid.elmously@...onical.com, philip.cox@...onical.com,
        x86@...nel.org, linux-mm@...ck.org, linux-coco@...ts.linux.dev,
        linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv7 05/14] x86/boot: Add infrastructure required for
 unaccepted memory support

On Wed, Jun 15, 2022 at 06:05:34PM +0300, Kirill A. Shutemov wrote:
> It also sounds painfully similar to uapi/ project. I'm not sure we want to
> go this path.

It is the same path perf tool is taking - see first paragraph:

https://lore.kernel.org/r/YtQM40VmiLTkPND2@kernel.org

I don't want to deal with the regular breakages or hacks to
boot/compressed/ just because little duplication. We copy the header
once and that's it - it doesn't even have to get updated like perf tool
does from time to time.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette