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 B7740C48BC3 for ; Mon, 19 Feb 2024 16:41:23 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rc6hL-0006Rm-SO; Mon, 19 Feb 2024 11:40:55 -0500 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 1rc6hK-0006EU-8P for qemu-devel@nongnu.org; Mon, 19 Feb 2024 11:40:54 -0500 Received: from mail-lf1-x12f.google.com ([2a00:1450:4864:20::12f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rc6hH-0003Rf-W5 for qemu-devel@nongnu.org; Mon, 19 Feb 2024 11:40:53 -0500 Received: by mail-lf1-x12f.google.com with SMTP id 2adb3069b0e04-51181d8f52fso5867043e87.3 for ; Mon, 19 Feb 2024 08:40:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1708360850; x=1708965650; darn=nongnu.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=TUdQ7xp7QgHpCDmJh85ReBiVVfoP254Zxjtyb8OjtGA=; b=BhtbTdoVI1+QYZjUGcTCHhnUaGf6usweS53AQ5HtUunJKQjqYVAFITDWeJtb1T/3ql lbDBFQb1ETknDJ0GtyPZiSeRzTi3BN7rlI03U8ID3g1MQmmObWktDhRCtmJkYjM5DaW0 dtNQ9EqHgMkvcMCLJ/00I8dd6bmZqllbwNlN08z+CxwtozOp1QwXZck6F2+YerLfCjuB JgGpBZzF9oqZz8ZHEWjf0BDzM69NHYIiySUGXYA4DnX4jVzvTMp4rIUDHF/A1mWwcsQk 4BI4zISQZ52WDmOhPzoOCz71rbkUbvXwAHB4Tj4YVAZ5vxtJNMIVa2MH8nykoJ3N4HVy AH8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708360850; x=1708965650; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TUdQ7xp7QgHpCDmJh85ReBiVVfoP254Zxjtyb8OjtGA=; b=OiGhjtPNJxk33iSZdJyQ2jkx6QCllk4r3luXDD7Rs7PyzfOst7cp/xcBWaJ/XXmeo/ PiqZQt6DBK+F69GJszeZuqctX2X3/EisVmxtNXGvV2bzysw6qF5Gwk929IN1Vi2Qj968 J4q1D6keRIYpNEEBUDKLz0dU0r7WYNkzJdR2Vrxld95BMiFjjD6LI+NAxZkZ+fYcDJTs qLp4n1yeEJxOih9EidGNhamuPMx2TlgWZob+/c9Af7QiPr42jt38cUI1zE9uPHK5obow ZWMV5LocZXLePjmKqHckdx0ddHnusDGAizA/2XxRjPz7aTGSpxlJS9g5V6oNH3PF8Uwu NwIw== X-Forwarded-Encrypted: i=1; AJvYcCU52fJYVzHJvQ1LksjldU7jQjG4GGtfqXDFjm2O9QJourJT9KGmh86a1JjU3MAFCN5rZ7VC77BEDIjWspi9q1JtCkovRio= X-Gm-Message-State: AOJu0Yye9u/182CweBlH50lTxy46O/IgERUsvcI/k7ukUc+uOtS3UuJ9 7fZqOuMxGbPMT8dHD8awtSF5PIIUcFGD3imRi9PQ0mDkzBo0tvLXP0Uatu1Ix9TGXNWfRpnBSPx l5GVRr/BDtZfpHDgswQPiFnZUw5unr7BNrcMLI2/zVva95J5D X-Google-Smtp-Source: AGHT+IGkNaYSRXydzl/uTppbLpkghrUVV/RnR1pVsOY2p2VO5+bf0Mjw4HDM6am9tnXBSflB0zb66sCnuA+I0OKufYU= X-Received: by 2002:a05:6512:34c9:b0:512:be5a:e33a with SMTP id w9-20020a05651234c900b00512be5ae33amr805984lfr.48.1708360850062; Mon, 19 Feb 2024 08:40:50 -0800 (PST) MIME-Version: 1.0 References: <0a084faf-3685-4134-aecc-5edf13111d89@redhat.com> In-Reply-To: <0a084faf-3685-4134-aecc-5edf13111d89@redhat.com> From: Peter Maydell Date: Mon, 19 Feb 2024 16:40:38 +0000 Message-ID: Subject: Re: dropping 32-bit Windows host support To: Thomas Huth Cc: =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , QEMU Developers , Stefan Weil Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::12f; envelope-from=peter.maydell@linaro.org; helo=mail-lf1-x12f.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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 On Mon, 19 Feb 2024 at 16:26, Thomas Huth wrote: > > On 19/02/2024 16.53, Daniel P. Berrang=C3=A9 wrote: > > On Mon, Feb 19, 2024 at 03:37:31PM +0000, Peter Maydell wrote: > >> Our msys2 32-bit Windows host CI job has been failing recently > >> because upstream MSYS2 are starting to phase out 32-bit windows > >> host support and are steadily removing i686 versions of packages. > >> The latest is dtc: > >> https://gitlab.com/qemu-project/qemu/-/issues/2177 > >> > >> The writing is clearly on the wall for their 32-bit support, judging > >> from the "2023-12-13 - Starting to drop some 32-bit Packages" news > >> item at https://www.msys2.org/news/ and associated discussion at > >> https://github.com/msys2/MINGW-packages/discussions/19326 . > >> > >> QEMU on a 32-bit host is not likely to be a great experience, and I > >> suspect we don't have many users using 32-bit Windows who couldn't > >> use the 64-bit version instead. Our Download page points users at > >> MSYS2's packages, and they have already dropped the 32-bit QEMU > >> package build. Stefan Weil's binaries page, which is the other thing > >> we link to from Download, has no 32-bit version newer than 7.2.0. > >> So anybody using 32-bit Windows QEMU must be building it themselves. > >> Plus, we've already deprecated system emulation on 32-bit x86 hosts, > >> so the only remaining "supported" config is with the NVMM or WHPX > >> accelerators. > > > > The other data point is that Win11 is 64-bit only, and IIUC, > > Win10 was 64-bit only for new OEM installs too, only upgrades > > or end user installs could choose 32-bit. > > Yes, and considering that there will likely be a Windows 12 at one point = in > time, we'll drop support for Win10 and thus 32-bit support anyway. > > >> I suggest that we should: > >> > >> * remove the msys2-32bit CI job entirely (we will still have at leas= t > >> compile-time coverage via the cross-win32-system job) > >> * document that the 32-bit Windows support is deprecated in > >> docs/about/build-platforms.rst and deprecated.rst > >> * update our Download page to remove mention of 32-bit Windows > >> > >> Any objections? > > > > I think that's sane. > > Sounds good to me, too. > > Note that we already have an entry for "System emulation on 32-bit x86 > hosts" in the deprecation list ... so IMHO we could also justify to drop = the > 32-bit Windows support immediately, since that's a subset of that entry. Mmm. I had initially misread that as only applying to TCG, but it's more general than that. So I think I agree that we should go ahead and mark 32-bit Windows support as definitively dropped. I'll put together some patches at some point. -- PMM