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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 96294C6FD1F for ; Thu, 16 Mar 2023 07:11:22 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pchkv-00028y-71; Thu, 16 Mar 2023 03:10:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pchfq-0003qV-VV for qemu-devel@nongnu.org; Thu, 16 Mar 2023 03:05:28 -0400 Received: from mail-wm1-x32f.google.com ([2a00:1450:4864:20::32f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pchfo-000675-Ka for qemu-devel@nongnu.org; Thu, 16 Mar 2023 03:05:18 -0400 Received: by mail-wm1-x32f.google.com with SMTP id m35so492703wms.4 for ; Thu, 16 Mar 2023 00:05:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1678950311; h=content-transfer-encoding:in-reply-to:cc:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=DJr0AKZfo6D8KKt5N56cKtNSh8oDsqkHRdpz55dfKMg=; b=ttzsdJTVO0UsMWcnUrs1E0jL/kvJWNMAQA56eZG3KtUSAgBlpdHbeWPNJfHIpSjbSG PmNFHH+HZkP8MGXFi0Vks6kj7XEAf0QJrElrgHL1YHucEZKUyEgq0F8IYBfcAHnxOI7B J/vSxNht2nVZ9i2lQxq7lamKUagwuF8k0DwmHMyHlSIDscjbcYujCE6Afa0c53GbeaM/ dRJ9Rh4rcwgzHfH1QgMJT++a0Lgi4p/rqzq6s4wJtPBNn32NZYWaeJuY/vCfixNQ+gVp lkIepUBCM5b6Ef1n7LCniiTFLxI0j1VaJwayLHFdqLFwCdD//ol9DgLLjR6PeZor7EUp v/1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678950311; h=content-transfer-encoding:in-reply-to:cc:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DJr0AKZfo6D8KKt5N56cKtNSh8oDsqkHRdpz55dfKMg=; b=Bm91eR7qYgEcm/g9fwgPgMPGXriT7RzW0nyUkmeuTYOl+gDTkyGqQklchXtOEfsD8X VXZ3ZddHpeo+cPGuL4lbFLuDYalj9DiGrPuTXeEKGzQdNQBJMyrXYlXmLEY9JlYpGWPx Pe2jQ92mjdHMGOEN3XbFggXqm/SDVmfmzTzQez6SWNL2N3nXKyJuumUJCdAhYNBjA3sb ldY9/P8+Lb/Xg/N1+QD6IB0EJeqljb5DrK2KGNBagybJV6EXdJtEtbjnXOQPXG6Je40+ zRCXbr+rqNnrjYdjWKgld9dRt99A719LL7Q7OrXxsmpAuaOBrOcED1kqxgZv95do7oKT LguA== X-Gm-Message-State: AO0yUKUUklEq6PgFAn/CgJTEkCD4CyxlsK0FkcXUl0LLKomdcHPLLC1V hLd2OhTxokF8K2bdoTqTmVFotw== X-Google-Smtp-Source: AK7set+tGKbnI0jAt7tIpySqV6YCuOq4n+1TssQBy9ea2TV+m5YV8d+is7jbTK43CPH6cXg08J+Mew== X-Received: by 2002:a05:600c:1912:b0:3ed:2217:4636 with SMTP id j18-20020a05600c191200b003ed22174636mr12993016wmq.19.1678950311613; Thu, 16 Mar 2023 00:05:11 -0700 (PDT) Received: from [192.168.30.216] ([81.0.6.76]) by smtp.gmail.com with ESMTPSA id o9-20020a05600c4fc900b003ea57808179sm4453414wmq.38.2023.03.16.00.05.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Mar 2023 00:05:10 -0700 (PDT) Message-ID: Date: Thu, 16 Mar 2023 08:05:09 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: dropping 32-bit host support Content-Language: en-US To: Andrew Randrianasulu , qemu-discuss@nongnu.org References: From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Cc: QEMU Developers , Thomas Huth In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::32f; envelope-from=philmd@linaro.org; helo=mail-wm1-x32f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Hi Andrew, On 16/3/23 01:57, Andrew Randrianasulu wrote: > Looking at https://wiki.qemu.org/ChangeLog/8.0 > > > === > System emulation on 32-bit x86 and ARM hosts has been deprecated. The > QEMU project no longer considers 32-bit x86 and ARM support for system > emulation to be an effective use of its limited resources, and thus > intends to discontinue. > >  == > > well, I guess arguing from memory-consuption point on 32 bit x86 hosts > (like my machine where I run 32 bit userspace on 64 bit kernel) is not If you use a 64-bit kernel, then your host is 64-bit :) host: hardware where you run QEMU guest: what is run within QEMU Running 32-bit *guest* on your 64-bit *host* is still supported. We don't plan to support running 32-bit WinXP x86 (guest) on 32-bit Raspberry Pi 2 (host) for example. > going anywhere, but what about 32bit userspace on Android tablets, > either via Limbo emulator or qemu itself in Termux? *System* emulation [on 32-bit hosts] is deprecated. User emulation (such linux-user) is not. For example, you can still run 64-bit x86_64 Linux binaries on a 32-bit ARM Raspberry Pi. > At least I hope it will be not *actively* (intentionally) broken, just > ...unsupported (so users who know how to run git revert still will get > their build for some more time). Unsupported code almost always unintentionally end bit-rotting... I hope this is clearer. Regards, Phil.