From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FBBFC3404B for ; Tue, 18 Feb 2020 18:51:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C9F83208C4 for ; Tue, 18 Feb 2020 18:51:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YyfD8RI2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726461AbgBRSvb (ORCPT ); Tue, 18 Feb 2020 13:51:31 -0500 Received: from mail-pj1-f65.google.com ([209.85.216.65]:55179 "EHLO mail-pj1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726296AbgBRSva (ORCPT ); Tue, 18 Feb 2020 13:51:30 -0500 Received: by mail-pj1-f65.google.com with SMTP id dw13so1419987pjb.4; Tue, 18 Feb 2020 10:51:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=VVBvTCIz+yTpld7B2DsaTCEQHI9uyXmzgTeduGY+LYA=; b=YyfD8RI2sOZkvpQX+EPsxFwPE+8W6Mqhbgaev0cp3lZfa1zBdEkHJwnYok6Q84CGw5 4MotE/7eB6g0ZFFCcYW59THKajcBFuVQkh9BFG99NU4OcPCBKIJ5IhyZ5S4hXa/oScm2 nJSmaVJsd7eIJneNj5ixjj6vNqkw18m3Z+AYZTXAPJwSTIctzoTUoqVaTLRt7mGsD+sH I1tHTvOVQyjydoojWGlPS7DCuqsXCz2zvXVXBjr/KPWLvxOvhKdQMPPN7a8FmN+0QRCP bOoSRgPbC+gfD5KTmFsJiwvSQTGqMFcHqg1hlbCyOdsHBv/KcWHzGF2qBRfQ2uM8e332 BFAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=VVBvTCIz+yTpld7B2DsaTCEQHI9uyXmzgTeduGY+LYA=; b=JmwkiKjVioIH+MajnlXHcrTxgpJG7gYd++LcoQv+VhoiggcGoycobmlDhWGdQSNFcM 9Lg1xvgtA8qq++AmUR2Lvy4aoJo/FcR4kKJ5MYQfUCLZPRBEIdtJhl+hV6dTmK0zUnBA M62K5rIbwkAWmaq8GSiGqLJdak6ixekJCbEiDZUoAprju1kyZ/0Nh2b/EyEsCo18QqN5 dve1sOy+RvVqGe3PSzX6tVYEFRz5hjxnRByKB/pqTi4O7fgYTLE72tjfhflUI7/iwSkV +4Kxz/1kmti3la9KOwohnTQPzX2r1I0YLvStY5eU2r5xPcWeIcNOAhG+vDkDfJE5eF/w uRJg== X-Gm-Message-State: APjAAAWYIO59qTijlxele266b6cOd6VoPDJjK11ydsY6L3U7c/BXG8Hr AadVA/uWdwswqGHVQAqva2E= X-Google-Smtp-Source: APXvYqzvrBKSEU9iKuP0lRt9jwVl6eac+xJEeOlhpux5veVmUEO3+4YXawgvXtL/rE+XQnMB3A5eUQ== X-Received: by 2002:a17:902:7283:: with SMTP id d3mr21924336pll.118.1582051889702; Tue, 18 Feb 2020 10:51:29 -0800 (PST) Received: from [10.67.49.41] ([192.19.223.252]) by smtp.googlemail.com with ESMTPSA id gx2sm4000789pjb.18.2020.02.18.10.51.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Feb 2020 10:51:29 -0800 (PST) Subject: Re: [RFC PATCH 00/11] Removing Calxeda platform support To: Rob Herring , Andre Przywara Cc: Mark Langsdorf , kvm@vger.kernel.org, Viresh Kumar , "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" , Will Deacon , linux-clk , soc@kernel.org, Joerg Roedel , Daniel Lezcano , devicetree@vger.kernel.org, Jon Loeliger , "open list:THERMAL" , Eric Auger , Alex Williamson , Tony Luck , Alexander Graf , Mauro Carvalho Chehab , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , linux-edac , Jens Axboe , Matthias Brugger , Stephen Boyd , netdev , Cornelia Huck , "Rafael J. Wysocki" , "linux-kernel@vger.kernel.org" , Linux IOMMU , Robert Richter , James Morse , Borislav Petkov , Robin Murphy , "David S. Miller" References: <20200218171321.30990-1-robh@kernel.org> <20200218181356.09ae0779@donnerap.cambridge.arm.com> From: Florian Fainelli Autocrypt: addr=f.fainelli@gmail.com; prefer-encrypt=mutual; keydata= xsDiBEjPuBIRBACW9MxSJU9fvEOCTnRNqG/13rAGsj+vJqontvoDSNxRgmafP8d3nesnqPyR xGlkaOSDuu09rxuW+69Y2f1TzjFuGpBk4ysWOR85O2Nx8AJ6fYGCoeTbovrNlGT1M9obSFGQ X3IzRnWoqlfudjTO5TKoqkbOgpYqIo5n1QbEjCCwCwCg3DOH/4ug2AUUlcIT9/l3pGvoRJ0E AICDzi3l7pmC5IWn2n1mvP5247urtHFs/uusE827DDj3K8Upn2vYiOFMBhGsxAk6YKV6IP0d ZdWX6fqkJJlu9cSDvWtO1hXeHIfQIE/xcqvlRH783KrihLcsmnBqOiS6rJDO2x1eAgC8meAX SAgsrBhcgGl2Rl5gh/jkeA5ykwbxA/9u1eEuL70Qzt5APJmqVXR+kWvrqdBVPoUNy/tQ8mYc nzJJ63ng3tHhnwHXZOu8hL4nqwlYHRa9eeglXYhBqja4ZvIvCEqSmEukfivk+DlIgVoOAJbh qIWgvr3SIEuR6ayY3f5j0f2ejUMYlYYnKdiHXFlF9uXm1ELrb0YX4GMHz80nRmxvcmlhbiBG YWluZWxsaSA8Zi5mYWluZWxsaUBnbWFpbC5jb20+wmYEExECACYCGyMGCwkIBwMCBBUCCAME FgIDAQIeAQIXgAUCVF/S8QUJHlwd3wAKCRBhV5kVtWN2DvCVAJ4u4/bPF4P3jxb4qEY8I2gS 6hG0gACffNWlqJ2T4wSSn+3o7CCZNd7SLSDOwU0EVxvH8AEQAOqv6agYuT4x3DgFIJNv9i0e S443rCudGwmg+CbjXGA4RUe1bNdPHYgbbIaN8PFkXfb4jqg64SyU66FXJJJO+DmPK/t7dRNA 3eMB1h0GbAHlLzsAzD0DKk1ARbjIusnc02aRQNsAUfceqH5fAMfs2hgXBa0ZUJ4bLly5zNbr r0t/fqZsyI2rGQT9h1D5OYn4oF3KXpSpo+orJD93PEDeseho1EpmMfsVH7PxjVUlNVzmZ+tc IDw24CDSXf0xxnaojoicQi7kzKpUrJodfhNXUnX2JAm/d0f9GR7zClpQMezJ2hYAX7BvBajb Wbtzwi34s8lWGI121VjtQNt64mSqsK0iQAE6OYk0uuQbmMaxbBTT63+04rTPBO+gRAWZNDmQ b2cTLjrOmdaiPGClSlKx1RhatzW7j1gnUbpfUl91Xzrp6/Rr9BgAZydBE/iu57KWsdMaqu84 JzO9UBGomh9eyBWBkrBt+Fe1qN78kM7JO6i3/QI56NA4SflV+N4PPgI8TjDVaxgrfUTV0gVa cr9gDE5VgnSeSiOleChM1jOByZu0JTShOkT6AcSVW0kCz3fUrd4e5sS3J3uJezSvXjYDZ53k +0GS/Hy//7PSvDbNVretLkDWL24Sgxu/v8i3JiYIxe+F5Br8QpkwNa1tm7FK4jOd95xvYADl BUI1EZMCPI7zABEBAAHCwagEGBECAAkFAlcbx/ACGwICKQkQYVeZFbVjdg7BXSAEGQECAAYF Alcbx/AACgkQh9CWnEQHBwSJBw//Z5n6IO19mVzMy/ZLU/vu8flv0Aa0kwk5qvDyvuvfiDTd WQzq2PLs+obX0y1ffntluhvP+8yLzg7h5O6/skOfOV26ZYD9FeV3PIgR3QYF26p2Ocwa3B/k P6ENkk2pRL2hh6jaA1Bsi0P34iqC2UzzLq+exctXPa07ioknTIJ09BT31lQ36Udg7NIKalnj 5UbkRjqApZ+Rp0RAP9jFtq1n/gjvZGyEfuuo/G+EVCaiCt3Vp/cWxDYf2qsX6JxkwmUNswuL C3duQ0AOMNYrT6Pn+Vf0kMboZ5UJEzgnSe2/5m8v6TUc9ZbC5I517niyC4+4DY8E2m2V2LS9 es9uKpA0yNcd4PfEf8bp29/30MEfBWOf80b1yaubrP5y7yLzplcGRZMF3PgBfi0iGo6kM/V2 13iD/wQ45QTV0WTXaHVbklOdRDXDHIpT69hFJ6hAKnnM7AhqZ70Qi31UHkma9i/TeLLzYYXz zhLHGIYaR04dFT8sSKTwTSqvm8rmDzMpN54/NeDSoSJitDuIE8givW/oGQFb0HGAF70qLgp0 2XiUazRyRU4E4LuhNHGsUxoHOc80B3l+u3jM6xqJht2ZyMZndbAG4LyVA2g9hq2JbpX8BlsF skzW1kbzIoIVXT5EhelxYEGqLFsZFdDhCy8tjePOWK069lKuuFSssaZ3C4edHtkZ8gCfWWtA 8dMsqeOIg9Trx7ZBCDOZGNAAnjYQmSb2eYOAti3PX3Ex7vI8ZhJCzsNNBEjPuBIQEAC/6NPW 6EfQ91ZNU7e/oKWK91kOoYGFTjfdOatp3RKANidHUMSTUcN7J2mxww80AQHKjr3Yu2InXwVX SotMMR4UrkQX7jqabqXV5G+88bj0Lkr3gi6qmVkUPgnNkIBe0gaoM523ujYKLreal2OQ3GoJ PS6hTRoSUM1BhwLCLIWqdX9AdT6FMlDXhCJ1ffA/F3f3nTN5oTvZ0aVF0SvQb7eIhGVFxrlb WS0+dpyulr9hGdU4kzoqmZX9T/r8WCwcfXipmmz3Zt8o2pYWPMq9Utby9IEgPwultaP06MHY nhda1jfzGB5ZKco/XEaXNvNYADtAD91dRtNGMwRHWMotIGiWwhEJ6vFc9bw1xcR88oYBs+7p gbFSpmMGYAPA66wdDKGj9+cLhkd0SXGht9AJyaRA5AWB85yNmqcXXLkzzh2chIpSEawRsw8B rQIZXc5QaAcBN2dzGN9UzqQArtWaTTjMrGesYhN+aVpMHNCmJuISQORhX5lkjeg54oplt6Zn QyIsOCH3MfG95ha0TgWwyFtdxOdY/UY2zv5wGivZ3WeS0TtQf/BcGre2y85rAohFziWOzTaS BKZKDaBFHwnGcJi61Pnjkz82hena8OmsnsBIucsz4N0wE+hVd6AbDYN8ZcFNIDyt7+oGD1+c PfqLz2df6qjXzq27BBUboklbGUObNwADBQ//V45Z51Q4fRl/6/+oY5q+FPbRLDPlUF2lV6mb hymkpqIzi1Aj/2FUKOyImGjbLAkuBQj3uMqy+BSSXyQLG3sg8pDDe8AJwXDpG2fQTyTzQm6l OnaMCzosvALk2EOPJryMkOCI52+hk67cSFA0HjgTbkAv4Mssd52y/5VZR28a+LW+mJIZDurI Y14UIe50G99xYxjuD1lNdTa/Yv6qFfEAqNdjEBKNuOEUQOlTLndOsvxOOPa1mRUk8Bqm9BUt LHk3GDb8bfDwdos1/h2QPEi+eI+O/bm8YX7qE7uZ13bRWBY+S4+cd+Cyj8ezKYAJo9B+0g4a RVhdhc3AtW44lvZo1h2iml9twMLfewKkGV3oG35CcF9mOd7n6vDad3teeNpYd/5qYhkopQrG k2oRBqxyvpSLrJepsyaIpfrt5NNaH7yTCtGXcxlGf2jzGdei6H4xQPjDcVq2Ra5GJohnb/ix uOc0pWciL80ohtpSspLlWoPiIowiKJu/D/Y0bQdatUOZcGadkywCZc/dg5hcAYNYchc8AwA4 2dp6w8SlIsm1yIGafWlNnfvqbRBglSTnxFuKqVggiz2zk+1wa/oP+B96lm7N4/3Aw6uy7lWC HvsHIcv4lxCWkFXkwsuWqzEKK6kxVpRDoEQPDj+Oy/ZJ5fYuMbkdHrlegwoQ64LrqdmiVVPC TwQYEQIADwIbDAUCVF/S8QUJHlwd3wAKCRBhV5kVtWN2Do+FAJ956xSz2XpDHql+Wg/2qv3b G10n8gCguORqNGMsVRxrlLs7/himep7MrCc= Message-ID: Date: Tue, 18 Feb 2020 10:51:17 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-edac-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org On 2/18/20 10:40 AM, Rob Herring wrote: > On Tue, Feb 18, 2020 at 12:14 PM Andre Przywara wrote: >> >> On Tue, 18 Feb 2020 11:13:10 -0600 >> Rob Herring wrote: >> >> Hi, >> >>> Calxeda has been defunct for 6 years now. Use of Calxeda servers carried >>> on for some time afterwards primarily as distro builders for 32-bit ARM. >>> AFAIK, those systems have been retired in favor of 32-bit VMs on 64-bit >>> hosts. >>> >>> The other use of Calxeda Midway I'm aware of was testing 32-bit ARM KVM >>> support as there are few or no other systems with enough RAM and LPAE. Now >>> 32-bit KVM host support is getting removed[1]. >>> >>> While it's not much maintenance to support, I don't care to convert the >>> Calxeda DT bindings to schema nor fix any resulting errors in the dts files >>> (which already don't exactly match what's shipping in firmware). >> >> While every kernel maintainer seems always happy to take patches with a negative diffstat, I wonder if this is really justification enough to remove a perfectly working platform. I don't really know about any active users, but experience tells that some platforms really are used for quite a long time, even if they are somewhat obscure. N900 or Netwinder, anyone? >> >> So to not give the impression that actually *everyone* (from that small subset of people actively reading the kernel list) is happy with that, I think that having support for at least Midway would be useful. On the one hand it's a decent LPAE platform (with memory actually exceeding 4GB), and on the other hand it's something with capable I/O (SATA) and networking, so one can actually stress test the system. Which is the reason I was using that for KVM testing, but even with that probably going away now there remain still some use cases, and be it for general ARM(32) testing. > > Does LPAE with more than 4GB actually need to work if there's not > another platform out there? There are ARCH_BRCMSTB platforms that are 32-bit only and have 6GB of DRAM populated, and those continue to work just fine, though there is no known use for KVM AFAICT. -- Florian