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[82.30.61.225]) by smtp.gmail.com with ESMTPSA id o20sm17360009wmq.21.2022.02.16.03.01.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Feb 2022 03:01:25 -0800 (PST) Date: Wed, 16 Feb 2022 11:01:24 +0000 From: "Dr. David Alan Gilbert" To: Gerd Hoffmann Subject: Re: [PATCH 3/3] x86: Switch to q35 as the default machine type Message-ID: References: <20220215162537.605030-1-dgilbert@redhat.com> <20220215162537.605030-4-dgilbert@redhat.com> <20220216105808.77kqhmsagz3ej74h@sirius.home.kraxel.org> MIME-Version: 1.0 In-Reply-To: <20220216105808.77kqhmsagz3ej74h@sirius.home.kraxel.org> User-Agent: Mutt/2.1.5 (2021-12-30) Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@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=170.10.133.124; envelope-from=dgilbert@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, Daniel =?iso-8859-1?Q?P=2E_Berrang=E9?= , mst@redhat.com, quintela@redhat.com, qemu-devel@nongnu.org, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Gerd Hoffmann (kraxel@redhat.com) wrote: > 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. Oh, that's probably easy to do; what are other peoples thoughts on that? Dave > take care, > Gerd > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK