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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_2 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 CA08FC3404D for ; Tue, 18 Feb 2020 18:14:16 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8E5AF21D56 for ; Tue, 18 Feb 2020 18:14:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pPtVHmsp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E5AF21D56 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=lyt3mfqOjbdo0sMuPMC/9JS4zzJ4sIW0H8D1DqHkYHA=; b=pPtVHmspcQXOLM ee36Ho+jAqIRgzDHiZhLoj4FgtfdMcuKI7vQEsnlZZ4TK+QTvt+4NfNfcTEiO7G7LWWpTLbxIbge1 V9wNTb7/Tfz0d/tRMzh6IxTlcBDLm/oWJE9WhSWNSi4IjkInFtuTdeiUaBfalqoy5Hz1EcSrYHyvd QDlZNGMhx5OCLVP1Tn/03OSSAT+GDy0DSO1A9/gmlUmvffi7Gq347dSJah5dBKT7oGj/JYokDIm/R d0BhW8tLWhVXxAB5Ep3FshO/gEVDkyerMXt5VbQte+eIYA9pNp5iERHvGNFBYEehOZifZZcPptN1G FotzpB55SZ7eLDJMi77g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j47Nq-0007nq-KW; Tue, 18 Feb 2020 18:14:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j47Nl-0007jx-N7 for linux-arm-kernel@lists.infradead.org; Tue, 18 Feb 2020 18:14:07 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 65A9331B; Tue, 18 Feb 2020 10:14:03 -0800 (PST) Received: from donnerap.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8412E3F68F; Tue, 18 Feb 2020 10:13:59 -0800 (PST) Date: Tue, 18 Feb 2020 18:13:56 +0000 From: Andre Przywara To: Rob Herring Subject: Re: [RFC PATCH 00/11] Removing Calxeda platform support Message-ID: <20200218181356.09ae0779@donnerap.cambridge.arm.com> In-Reply-To: <20200218171321.30990-1-robh@kernel.org> References: <20200218171321.30990-1-robh@kernel.org> Organization: ARM X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; aarch64-unknown-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200218_101405_840020_546AF9C5 X-CRM114-Status: GOOD ( 23.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Langsdorf , kvm@vger.kernel.org, Viresh Kumar , linux-ide@vger.kernel.org, Will Deacon , linux-clk@vger.kernel.org, soc@kernel.org, Joerg Roedel , Daniel Lezcano , devicetree@vger.kernel.org, Jon Loeliger , linux-pm@vger.kernel.org, Eric Auger , Alex Williamson , Tony Luck , Alexander Graf , Mauro Carvalho Chehab , linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org, Jens Axboe , Matthias Brugger , Stephen Boyd , netdev@vger.kernel.org, Cornelia Huck , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Robert Richter , James Morse , Borislav Petkov , Robin Murphy , "David S. Miller" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. I don't particularly care about the more optional parts like EDAC, cpuidle, or cpufreq, but I wonder if keeping in at least the rather small SATA and XGMAC drivers and basic platform support is feasible. If YAML DT bindings are used as an excuse, I am more than happy to convert those over. And if anyone has any particular gripes with some code, maybe there is a way to fix that instead of removing it? I was always wondering if we could get rid of the mach-highbank directory, for instance. I think most of it is Highbank (Cortex-A9) related. Cheers, Andre > > Rob > > [1] https://lore.kernel.org/linux-arm-kernel/20200210141324.21090-1-maz@kernel.org/ > > Rob Herring (11): > vfio: Remove Calxeda XGMAC reset driver > ata: Remove Calxeda AHCI driver > cpuidle: Remove Calxeda driver > cpufreq: Remove Calxeda driver > EDAC: Remove Calxeda drivers > iommu: arm-smmu: Remove Calxeda secure mode quirk > net: Remove Calxeda XGMAC driver > clk: Remove Calxeda driver > ARM: Remove Calxeda platform support > ARM: dts: Remove Calxeda platforms > dt-bindings: Remove Calxeda platforms bindings > > .../devicetree/bindings/arm/calxeda.yaml | 22 - > .../devicetree/bindings/arm/calxeda/l2ecc.txt | 15 - > .../devicetree/bindings/ata/sata_highbank.txt | 44 - > .../devicetree/bindings/clock/calxeda.txt | 17 - > .../memory-controllers/calxeda-ddr-ctrlr.txt | 16 - > .../devicetree/bindings/net/calxeda-xgmac.txt | 18 - > .../bindings/phy/calxeda-combophy.txt | 17 - > MAINTAINERS | 14 - > arch/arm/Kconfig | 2 - > arch/arm/Kconfig.debug | 12 +- > arch/arm/Makefile | 1 - > arch/arm/boot/dts/Makefile | 3 - > arch/arm/boot/dts/ecx-2000.dts | 103 - > arch/arm/boot/dts/ecx-common.dtsi | 230 -- > arch/arm/boot/dts/highbank.dts | 161 -- > arch/arm/configs/multi_v7_defconfig | 5 - > arch/arm/mach-highbank/Kconfig | 19 - > arch/arm/mach-highbank/Makefile | 4 - > arch/arm/mach-highbank/core.h | 18 - > arch/arm/mach-highbank/highbank.c | 175 -- > arch/arm/mach-highbank/pm.c | 49 - > arch/arm/mach-highbank/smc.S | 25 - > arch/arm/mach-highbank/sysregs.h | 75 - > arch/arm/mach-highbank/system.c | 22 - > drivers/ata/Kconfig | 9 - > drivers/ata/Makefile | 1 - > drivers/ata/sata_highbank.c | 635 ------ > drivers/clk/Makefile | 1 - > drivers/clk/clk-highbank.c | 329 --- > drivers/cpufreq/Kconfig.arm | 10 - > drivers/cpufreq/Makefile | 3 +- > drivers/cpufreq/cpufreq-dt-platdev.c | 3 - > drivers/cpufreq/highbank-cpufreq.c | 106 - > drivers/cpuidle/Kconfig.arm | 7 - > drivers/cpuidle/Makefile | 1 - > drivers/cpuidle/cpuidle-calxeda.c | 72 - > drivers/edac/Kconfig | 14 - > drivers/edac/Makefile | 3 - > drivers/edac/highbank_l2_edac.c | 142 -- > drivers/edac/highbank_mc_edac.c | 272 --- > drivers/iommu/arm-smmu-impl.c | 43 - > drivers/net/ethernet/Kconfig | 1 - > drivers/net/ethernet/Makefile | 1 - > drivers/net/ethernet/calxeda/Kconfig | 9 - > drivers/net/ethernet/calxeda/Makefile | 2 - > drivers/net/ethernet/calxeda/xgmac.c | 1927 ----------------- > drivers/vfio/platform/reset/Kconfig | 8 - > drivers/vfio/platform/reset/Makefile | 2 - > .../reset/vfio_platform_calxedaxgmac.c | 74 - > 49 files changed, 2 insertions(+), 4740 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/arm/calxeda.yaml > delete mode 100644 Documentation/devicetree/bindings/arm/calxeda/l2ecc.txt > delete mode 100644 Documentation/devicetree/bindings/ata/sata_highbank.txt > delete mode 100644 Documentation/devicetree/bindings/clock/calxeda.txt > delete mode 100644 Documentation/devicetree/bindings/memory-controllers/calxeda-ddr-ctrlr.txt > delete mode 100644 Documentation/devicetree/bindings/net/calxeda-xgmac.txt > delete mode 100644 Documentation/devicetree/bindings/phy/calxeda-combophy.txt > delete mode 100644 arch/arm/boot/dts/ecx-2000.dts > delete mode 100644 arch/arm/boot/dts/ecx-common.dtsi > delete mode 100644 arch/arm/boot/dts/highbank.dts > delete mode 100644 arch/arm/mach-highbank/Kconfig > delete mode 100644 arch/arm/mach-highbank/Makefile > delete mode 100644 arch/arm/mach-highbank/core.h > delete mode 100644 arch/arm/mach-highbank/highbank.c > delete mode 100644 arch/arm/mach-highbank/pm.c > delete mode 100644 arch/arm/mach-highbank/smc.S > delete mode 100644 arch/arm/mach-highbank/sysregs.h > delete mode 100644 arch/arm/mach-highbank/system.c > delete mode 100644 drivers/ata/sata_highbank.c > delete mode 100644 drivers/clk/clk-highbank.c > delete mode 100644 drivers/cpufreq/highbank-cpufreq.c > delete mode 100644 drivers/cpuidle/cpuidle-calxeda.c > delete mode 100644 drivers/edac/highbank_l2_edac.c > delete mode 100644 drivers/edac/highbank_mc_edac.c > delete mode 100644 drivers/net/ethernet/calxeda/Kconfig > delete mode 100644 drivers/net/ethernet/calxeda/Makefile > delete mode 100644 drivers/net/ethernet/calxeda/xgmac.c > delete mode 100644 drivers/vfio/platform/reset/vfio_platform_calxedaxgmac.c > > > base-commit: 11a48a5a18c63fd7621bb050228cebf13566e4d8 > -- > 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel