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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F27B0C433EF for ; Thu, 10 Mar 2022 14:26:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243775AbiCJO1Q (ORCPT ); Thu, 10 Mar 2022 09:27:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57428 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243774AbiCJOXP (ORCPT ); Thu, 10 Mar 2022 09:23:15 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9E380158D89 for ; Thu, 10 Mar 2022 06:21:15 -0800 (PST) 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 0720C1691; Thu, 10 Mar 2022 06:21:07 -0800 (PST) Received: from [10.57.43.53] (unknown [10.57.43.53]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8C7B03FA20; Thu, 10 Mar 2022 06:21:04 -0800 (PST) Message-ID: <39f8d67f-dd0b-e8de-e007-619eee86c98e@arm.com> Date: Thu, 10 Mar 2022 14:21:00 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH 2/2] ARM: remove support for NOMMU ARMv4/v5 Content-Language: en-GB To: Arnd Bergmann , Linus Walleij Cc: Russell King , Arnd Bergmann , kernel test robot , Thomas Gleixner , Marc Zyngier , Ard Biesheuvel , Andrew Morton , Mark Rutland , Vladimir Murzin , Linux ARM , Linux Kernel Mailing List , "Russell King (Oracle)" , Anshuman Khandual References: <20220309144138.360482-1-arnd@kernel.org> <20220309144138.360482-2-arnd@kernel.org> <27250b4e-cf04-0dab-d658-bb472face5ea@arm.com> From: Robin Murphy In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022-03-10 09:23, Arnd Bergmann wrote: > On Thu, Mar 10, 2022 at 2:22 AM Linus Walleij wrote: >> >> On Wed, Mar 9, 2022 at 5:17 PM Arnd Bergmann wrote: >>> Robin >>>> In that case, it would probably make sense to garbage-collect all the >>>> configs, setup code and other stuff relating to older MMU-less CPU cores >>>> like ARM1156, ARM940, etc. at the same time. >>> >>> Right, good idea. These are only selected by CONFIG_ARCH_INTEGRATOR, >>> but that in turn doesn't build for CONFIG_MMU=n because it depends on >>> ARCH_MULTIPLATFORM. I'll send a patch for these. >> >> Just delete these, I do have these CPU tiles around but they are so obscure >> and I never got around to even testing to boot them. > > Right, of course you couldn't boot test them because it has been > impossible to even select them in Kconfig for years. I've added > a patch to completely remove the five v4/v5 NOMMU cores now, > will send that later. > > There are five more cores that are only referenced by mach-integrator > that are supposed to work (922T, 1020, 1020E, 1022, 1026). Have you > ever tested those, or should we consider removing them as well? > > At some point, there was a proposal to add an arm10 based SoC > to mainline, but that never happened and I'm fairly sure it won't > come back now. FWIW I have an Integrator/CM1026 that I'd love to play with purely for giggles, but it needs some serious archaeology to find and flash some firmware for it first. I also have a couple of "real" ARM1026s in the form of Conexant Solos-based routers[1] which I've done a little hacking on, but don't see myself ever realistically having enough time or motivation to actually upstream anything. And at this point I don't see OpenWRT having any more interest in boards with only 15MB of RAM (yes, they really do boot with "mem=15M" to reserve 1MB for the modem...) Cheers, Robin. [1] https://openwrt.org/toh/linksys/wag54g2