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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 BC9CAC3A59C for ; Fri, 16 Aug 2019 16:15:22 +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 92E972133F for ; Fri, 16 Aug 2019 16:15:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="oEFiuwoJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 92E972133F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=iki.fi 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:In-Reply-To:MIME-Version:References: 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=kr4AsGPsGoSjAmdFs02eEHvMCQwriIvTU7j6zE8okxk=; b=oEFiuwoJci4kUQ LNDO0Rc+bM6R6i5xiNXSoPn8TVgFY0bjzMIr3Y0suqcCTk+tzH0N3x+HqtYZ7bJMq8KLrz3LGiSb7 ak5fc/HkD/olEIIS6zlkEz6XQ+YO3EzNow38Y9RGZmr/Zs9abbalFn/wWm35YNZnyN8yfMFcYgknP 3qnH2s3bi7ihjsDkYtTXmHJPXBGwcRbLL4hIp2tZGYCngVv1k4/PXJA6Rw9Xcx6p2bfHgXGDQbb01 UwGZ4GgbsGSONHoOucKcGFZgFqZdPwrNS82xranutpIfYH60cEg+KULulWA4Bnxoq8oZqxE4MFeIs PyUXo9n5zR3WUfT8vMaA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hyesr-0000BI-Nk; Fri, 16 Aug 2019 16:15:21 +0000 Received: from emh02.mail.saunalahti.fi ([62.142.5.108]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hyeso-0000As-8I for linux-arm-kernel@lists.infradead.org; Fri, 16 Aug 2019 16:15:19 +0000 Received: from darkstar.musicnaut.iki.fi (85-76-65-201-nat.elisa-mobile.fi [85.76.65.201]) by emh02.mail.saunalahti.fi (Postfix) with ESMTP id 15AB6200D9; Fri, 16 Aug 2019 19:15:14 +0300 (EEST) Date: Fri, 16 Aug 2019 19:15:14 +0300 From: Aaro Koskinen To: Russell King - ARM Linux admin Subject: Re: [PATCH 1/7] [RFC] ARM: remove Intel iop33x and iop13xx support Message-ID: <20190816161514.GB30291@darkstar.musicnaut.iki.fi> References: <20190809162956.488941-1-arnd@arndb.de> <20190809163334.489360-1-arnd@arndb.de> <20190812094456.GI10598@jirafa.cyrius.com> <20190816154249.GA30291@darkstar.musicnaut.iki.fi> <20190816155833.GL13294@shell.armlinux.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190816155833.GL13294@shell.armlinux.org.uk> User-Agent: Mutt/1.5.24 (2015-08-30) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190816_091518_467158_3D0CBF93 X-CRM114-Status: GOOD ( 16.80 ) 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: Vinod Koul , Peter Teichmann , Arnd Bergmann , Bartosz Golaszewski , Linus Walleij , Linux Kernel Mailing List , "open list:GPIO SUBSYSTEM" , soc@kernel.org, linux-i2c , dmaengine@vger.kernel.org, Dan Williams , Martin Michlmayr , Linux ARM 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 Hi, On Fri, Aug 16, 2019 at 04:58:33PM +0100, Russell King - ARM Linux admin wrote: > On Fri, Aug 16, 2019 at 06:42:49PM +0300, Aaro Koskinen wrote: > > On Wed, Aug 14, 2019 at 10:36:01AM +0200, Linus Walleij wrote: > > > On Mon, Aug 12, 2019 at 11:45 AM Martin Michlmayr wrote: > > > > As Arnd points out, Debian used to have support for various iop32x > > > > devices. While Debian hasn't supported iop32x in a number of years, > > > > these devices are still usable and in use (RMK being a prime example). > > > > > > I suppose it could be a good idea to add support for iop32x to > > > OpenWrt and/or OpenEmbedded, both of which support some > > > pretty constrained systems. > > > > This platform is not really too constrained... E.g. on N2100 you have > > 512 MB RAM, SATA disks and gigabit ethernet. Not that different from > > mvebu that Debian currently (?) supports. Maybe with multiplatform they > > could support iop32x again. > > Probably not. The kernel has a dividing line between ARMv5 and ARMv6 > where it's not possible to multiplatform across that boundary, so > you're already needing separate kernel images there. > > Secondly, armhf distros won't be compatible with ARMv5, and to make > them compatible will make performance on armhf suffer - you have to > stop using barriers, exclusive load/store and a few other things. > You have to rely on the kuser page exported by the kernel (which is > now optional as it's deemed to be a security issue for ROP attacks) > for some things that such a userspace requires - such as NPTL support. > > Effectively, ARMv5 is an entirely separate userspace distro from armhf. I thought they still had armel for ARMv5 and mvebu (kirkwood). A. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel