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([2001:b07:6468:f312:91e7:65e:d8cd:fdb3]) by smtp.gmail.com with ESMTPSA id s12sm64718558wmh.34.2019.07.31.16.58.36 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Wed, 31 Jul 2019 16:58:36 -0700 (PDT) To: Laszlo Ersek , "Michael S. Tsirkin" , Sergio Lopez Pascual , Peter Maydell , qemu-devel References: <20190729125755.45008-1-slp@redhat.com> <932a0c3c-b6cb-540f-ca07-1559c8fe9049@redhat.com> From: Paolo Bonzini Message-ID: <9953cc99-80b3-814c-f75e-a16c987c23e5@redhat.com> Date: Thu, 1 Aug 2019 01:58:35 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <932a0c3c-b6cb-540f-ca07-1559c8fe9049@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.128.68 Subject: Re: [Qemu-devel] [RFC] virtio-mmio: implement modern (v2) personality (virtio-1) 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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 30/07/19 18:06, Laszlo Ersek wrote: > On 07/29/19 14:57, Sergio Lopez wrote: >> Implement the modern (v2) personality, according to the VirtIO 1.0 >> specification. >> >> Support for v2 among guests is not as widespread as it'd be >> desirable. While the Linux driver has had it for a while, support is >> missing, at least, from Tianocore EDK II, NetBSD and FreeBSD. > > That's right; not only are there no plans to implement virtio-mmio/1.0 > for OVMF (to my knowledge), I'd even argue against such efforts. > > OVMF is a heavy-weight guest firmware, which I see entirely out of scope > for "micro VMs". And so virtio-mmio/1.0 would seem like a needless & > unwelcome complication, from the OVMF maintainership perspective. But given that, why not rip out virtio-mmio completely? Paolo