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([2001:b07:6468:f312:784d:f09c:63f4:b9cb]) by smtp.gmail.com with ESMTPSA id z3sm19728927wrs.94.2020.01.27.01.35.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Jan 2020 01:35:58 -0800 (PST) Subject: Re: [PATCH v2] hw/i386: disable smbus migration for xenfv To: Paul Durrant , Olaf Hering References: <20200113174521.3336-1-olaf@aepfle.de> <20200116180321.24968-1-olaf@aepfle.de> <0335edd2-3d33-88f8-2ab4-4791f7289885@redhat.com> <20200117102244.22edd8a6.olaf@aepfle.de> <20200117140616.18cb8c45.olaf@aepfle.de> From: Paolo Bonzini Message-ID: Date: Mon, 27 Jan 2020 10:35:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-MC-Unique: ILgVop-BNqSYsA_0Cpuljw-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 207.211.31.120 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: Stefano Stabellini , Eduardo Habkost , "Michael S. Tsirkin" , "open list:All patches CC here" , Anthony Perard , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 20/01/20 12:18, Paul Durrant wrote: >> >> What would future domUs lose if 'xenfv' would be locked to 'pc-i440fx-3.0'? > > I guess eventually that pc type would be removed and then we'd have a > compat issue. That's years away, so ideally libxl would have migrated away from xenfv before that. For now, sticking to a fixed version as in Olaf's patch is a good stopgap measure. Paolo > Ideally I think libxl should simply not use xenfv and > then it can be deprecated and removed, and then such issues can be > dealt with directly in xl/libxl.