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 146D8C433F5 for ; Wed, 16 Feb 2022 11:03:08 +0000 (UTC) Received: from localhost ([::1]:48124 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nKI5T-0000MV-NT for qemu-devel@archiver.kernel.org; Wed, 16 Feb 2022 06:03:07 -0500 Received: from eggs.gnu.org ([209.51.188.92]:54278) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKI1I-0006Cg-3d for qemu-devel@nongnu.org; Wed, 16 Feb 2022 05:58:49 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:20513) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nKI10-0002ug-JZ for qemu-devel@nongnu.org; Wed, 16 Feb 2022 05:58:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1645009109; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=wDZmHyVlBY6FD5AdT7VXJPWd8ML0bOfHnRYm3D9PhNE=; b=HsOISpvFe8YqLiEpFAUpbI1/+ZjCaYgSo7BekS9XJxw1qnXJS15mez5JfY3nthM3ea2N7T Gb5oLKr+bnIb+SPTzZaY7qUAS716PE186KfEzIjJBahQbN+0f2gK/NysSuK/idd4cxYc5P 1awIuY4SlHAFYvF1Gfm9sLIrnOgUIZs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-385-7C_ZvQA_P9uoW86NdewIXA-1; Wed, 16 Feb 2022 05:58:26 -0500 X-MC-Unique: 7C_ZvQA_P9uoW86NdewIXA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 69941344B0; Wed, 16 Feb 2022 10:58:25 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.39.192.34]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 464CF1084182; Wed, 16 Feb 2022 10:58:10 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id C32DC1800617; Wed, 16 Feb 2022 11:58:08 +0100 (CET) Date: Wed, 16 Feb 2022 11:58:08 +0100 From: Gerd Hoffmann To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Subject: Re: [PATCH 3/3] x86: Switch to q35 as the default machine type Message-ID: <20220216105808.77kqhmsagz3ej74h@sirius.home.kraxel.org> References: <20220215162537.605030-1-dgilbert@redhat.com> <20220215162537.605030-4-dgilbert@redhat.com> MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=170.10.129.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.083, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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: , Cc: eduardo@habkost.net, thuth@redhat.com, mst@redhat.com, quintela@redhat.com, qemu-devel@nongnu.org, "Dr. David Alan Gilbert \(git\)" , pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, > Given the semantic differences from 'i440fx', changing the default > machine type has effects that are equivalent to breaking command > line syntax compatibility, which is something we've always tried > to avoid. And if we are fine breaking backward compatibility I'd rather *not* pick a default, effectively making -M $something mandatory, similar to arm. take care, Gerd