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 EB991CD5BAA for ; Thu, 5 Sep 2024 11:45:56 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1smAvo-0002MK-K8; Thu, 05 Sep 2024 07:45:44 -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 1smAvU-0002J4-6U for qemu-devel@nongnu.org; Thu, 05 Sep 2024 07:45:32 -0400 Received: from mail-wr1-x42a.google.com ([2a00:1450:4864:20::42a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1smAvR-0000YZ-R3 for qemu-devel@nongnu.org; Thu, 05 Sep 2024 07:45:23 -0400 Received: by mail-wr1-x42a.google.com with SMTP id ffacd0b85a97d-374bfc395a5so404616f8f.0 for ; Thu, 05 Sep 2024 04:45:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1725536720; x=1726141520; darn=nongnu.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=3CCOEC+mPWkmzrttYBwXr3os/UYAujQdylT9RM79BFE=; b=ZZPFGjG/wPbVPnU2j6iBfqKvI63iRBSrhfwxzMD99BBviQAIGt3qfL4XV4ttn4Pb3L 1PXsariaCUqyJSftBeu7BI3nOYWP10rcwSELG/Mm39lFiPhyohIiwqu2A9I+batFx++i vth5xCEDpivXELh/IFEMbVvyORTI3xdE9JZ0ZW9KJR4I0Te3PKgYRq4IcTMTSjY4e8BF FGzEoegP0I0Bna/D9YSO4N1+GkKNEXJDAWrcL7BRIHnMp0lw8KyEP6znLrXVlLi7jvqz VSTT/IwYXjVpDFmipD63Rq3TN5QathbjLyziXAJm8X5dR1PhljAd4V2Dn9kMGgmhxhDI Z6IA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725536720; x=1726141520; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=3CCOEC+mPWkmzrttYBwXr3os/UYAujQdylT9RM79BFE=; b=qnqZkxo8Q3FSxxyn5ry8ZcmXySLefLFkanhA9ADT4vtCJ4gjBVMXIDbYVmghGP3NGV Lhw5qy7rKmRdYI5lsSiDNc3SshX4YjrbfdJ3UtbF4JQysdPaiyXEY/6Tebec21ZMYycd ad7cJ4mKAmU5ydvsp0QKmbJEWAJI9kFI6J8RahFFOaytFtBwb6rKQuMQz8obSYwEKuuZ TKhEI359SLhlMdbjW9g4/YaeOOFofbt3Vp3I4L/O+dBPLYiwQdI6dQ7pl6OTBcFANjSs OfvanvGS/OCIV02Ydza1ktzRtBF1X6Jwj2pFiYABrK2U2U/nkjV6CENA/jry7ZCq/FOI rp4Q== X-Forwarded-Encrypted: i=1; AJvYcCVfbQBASuWuuJUtSrDJNUB4Sz5xaErmu+lnyqdHl8/z+0Kuel1G2Syzl2uwrdpUreua5bXWWvYGMsrx@nongnu.org X-Gm-Message-State: AOJu0Yzfplh3A2ZjnpKYrkvVrDOSjJAvapJKYCjXimnb9+I6+hjEroi7 pnbQi4p3Gn9dzWV09lLl2Y2EawYYlOpmiSAPGxmqTf0/3P7R+LrfkbyBe+DutuM= X-Google-Smtp-Source: AGHT+IGxj1Pds931SdrA2qa+2/hhqdR+Vr6GFoy49lV3LIrBGB2MOz5jX7d9R9loEcvXbLdjhAU5/w== X-Received: by 2002:a5d:4288:0:b0:374:cee6:c298 with SMTP id ffacd0b85a97d-3779b847ba0mr3312239f8f.21.1725536719594; Thu, 05 Sep 2024 04:45:19 -0700 (PDT) Received: from [192.168.1.67] ([78.196.4.158]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42c800554d6sm149337535e9.43.2024.09.05.04.45.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Sep 2024 04:45:19 -0700 (PDT) Message-ID: <8e593b82-f0ba-4ab4-bff6-4c1503b49747@linaro.org> Date: Thu, 5 Sep 2024 13:45:17 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH] deprecation: don't enable TCG plugins by default on 32 bit hosts To: =?UTF-8?Q?Alex_Benn=C3=A9e?= , qemu-devel@nongnu.org Cc: Paolo Bonzini , Thomas Huth , "reviewer:Incompatible changes" References: <20240905111153.786500-1-alex.bennee@linaro.org> Content-Language: en-US From: =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= In-Reply-To: <20240905111153.786500-1-alex.bennee@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::42a; envelope-from=philmd@linaro.org; helo=mail-wr1-x42a.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 5/9/24 13:11, Alex Bennée wrote: > The existing plugins already liberally use host pointer stuffing for > passing user data which will fail when doing 64 bit guests on 32 bit > hosts. We should discourage this by officially deprecating support and > adding another nail to the 32 bit host coffin. > > Signed-off-by: Alex Bennée > --- > docs/about/deprecated.rst | 11 +++++++++++ > configure | 11 ++++++++++- > 2 files changed, 21 insertions(+), 1 deletion(-) > @@ -480,11 +485,13 @@ case "$cpu" in > > riscv32 | riscv64) We need to split the riscv64 case. > host_arch=riscv > + host_bits=32 > linux_arch=riscv > ;;