linux-kernel - Re: [PATCHv8 00/11] Linear Address Masking enabling

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Message-ID: <20220904010001.knlcejmw4lg2uzy3@box.shutemov.name>
Date:   Sun, 4 Sep 2022 04:00:01 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Bharata B Rao <bharata@....com>, ananth.narayan@....com,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        Kostya Serebryany <kcc@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Taras Madan <tarasmadan@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        "H . J . Lu" <hjl.tools@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv8 00/11] Linear Address Masking enabling

On Tue, Aug 30, 2022 at 04:00:53AM +0300, Kirill A. Shutemov wrote:
> Linear Address Masking[1] (LAM) modifies the checking that is applied to
> 64-bit linear addresses, allowing software to use of the untranslated
> address bits for metadata.
> 
> The patchset brings support for LAM for userspace addresses. Only LAM_U57 at
> this time.
> 
> Please review and consider applying.
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam

+Bharata, Ananth.

Do you folks have any feedback on the patchset?

Looks like AMD version of the tagged pointers feature does not get
traction as of now, but I want to be sure that the interface introduced
here can be suitable for your future plans.

Do you see anything in the interface that can prevent it to be extended to
the AMD feature?

-- 
  Kiryl Shutsemau / Kirill A. Shutemov