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=-6.2 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, 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 7C22EC433E2 for ; Sun, 6 Sep 2020 02:03:38 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id DB35420738 for ; Sun, 6 Sep 2020 02:03:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="b1cEDTQj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB35420738 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:46316 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kEk1o-0008DH-Lz for qemu-devel@archiver.kernel.org; Sat, 05 Sep 2020 22:03:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35214) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kEk1G-0007n5-Uh for qemu-devel@nongnu.org; Sat, 05 Sep 2020 22:03:02 -0400 Received: from mail-pj1-x1041.google.com ([2607:f8b0:4864:20::1041]:55700) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kEk1E-0001xU-Vb for qemu-devel@nongnu.org; Sat, 05 Sep 2020 22:03:02 -0400 Received: by mail-pj1-x1041.google.com with SMTP id 2so4953283pjx.5 for ; Sat, 05 Sep 2020 19:02:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=HhTWQZ3pU6KdfKoPTW5sOF1zWhexwCqkuxGKLoGbVDk=; b=b1cEDTQjGW0qVWnMdILMzF/yL6RMUaX88yTY+P8pasm9aXER2D7YTZQEqFSN2i4l0C /to6mTG/VqpWzmByxPocF/D672ozDGENe4xp67k3dIqPU2DoOAuTA4s/cmydqadcx+c6 pbiiePgqZXi5fcGja2mXQj2hgQm3BXv5p0rAVLEF6++UHS2I6ioMjzNc4oeyjJgDy61J Uf6Z2JQaETHmVntnDWE7uSQx464uw3Qsk5MwQnwvmaeeXiytsgMnhZt3UPoFTu1Xon9/ On41zEe/OOpO+h9yQVnh6jLdwfWNCguF1w/wtEHBqiQwRvM8pNJgqYw3NW6xUJtVywL+ s9kw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=HhTWQZ3pU6KdfKoPTW5sOF1zWhexwCqkuxGKLoGbVDk=; b=PQpfd0jmSlAVUPfqdNecnchbasCtYjj37PYzjQkPFxD+XPOTO5+kEtwmjixbGs9ZsX ZV7dbhJwy230lRp3qjMjAsgJ6TJqUKg1+q7KTyxOzMglcUTjEhvjzmi3g4YlLLYV0QcE 3KjNQc2mGmXYeFVxrcjbHjm8c1ZvCFWjqglc86Vo21Afkkweg8M2qJA0cGKD9ihYLk2C lEb7WbT3PKI55XNKk+uWbn+ZSm2vSA+ss0RhLPD0iCQfyJDQTeHZh/2lh0/RgKRTeBUM tS5rjFjH86JvnQJUrsbOnqYVhhcbvC52YbMrxR+bEIt2U1sVwNAfJ7c/EyXUGBzoYBTO Am/g== X-Gm-Message-State: AOAM531CAuckNteMJlAt5d6Sb4e2ZIs1WjYx3Yo66Mr6Dk0HudWgdZFx f1ZnecO1Uhfpl87eO9bb6DIoVQ== X-Google-Smtp-Source: ABdhPJwSGyHiAi3o+rzwAU/h3t1BnyyMQGXtnXD/O5++3jOuUrD7SZHG8FV1+VDXyoeypcNDAisA2A== X-Received: by 2002:a17:90a:fa8b:: with SMTP id cu11mr13029850pjb.10.1599357778657; Sat, 05 Sep 2020 19:02:58 -0700 (PDT) Received: from [192.168.1.11] ([71.212.141.89]) by smtp.gmail.com with ESMTPSA id v10sm10334219pff.192.2020.09.05.19.02.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 05 Sep 2020 19:02:57 -0700 (PDT) Subject: Re: [RFC PATCH] docs/system/deprecated: mark ppc64abi32-linux-user for deprecation To: Peter Maydell , =?UTF-8?Q?Alex_Benn=c3=a9e?= References: <20200904165140.10962-1-alex.bennee@linaro.org> From: Richard Henderson Message-ID: Date: Sat, 5 Sep 2020 19:02:55 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::1041; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1041.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 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=-0.107, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "reviewer:Incompatible changes" , Richard Henderson , QEMU Developers , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 9/4/20 10:21 AM, Peter Maydell wrote: > On Fri, 4 Sep 2020 at 17:52, Alex Bennée wrote: >> >> It's buggy and we are not sure anyone uses it. > >> +``ppc64abi32`` CPUs (since 5.2.0) >> +''''''''''''''''''''''''''''''''' >> + >> +The ``ppc64abi32`` architecture has a number of issues which regularly >> +trip up our CI testing and is suspected to be quite broken. >> +Furthermore the maintainers are unsure what the correct behaviour >> +should be and strongly suspect no one actually uses it. > > IRC discussion suggests we do know what the correct behaviour > is -- it should be "what the compat32 interface of a 64-bit > PPC kernel gives you", it's just that the code doesn't do that > (and never has?). It's like the mipsn32, mipsn32el, sparc32plus > ABIs which we also implement (hopefully correctly...) > > But "this has always been broken and nobody complained" is > a good reason to deprecate anyway. Indeed. With the last sentence changed to "For that reason the maintainers strongly suspect no one actually uses it." Reviewed-by: Richard Henderson r~