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[83.35.20.18]) by smtp.gmail.com with ESMTPSA id t6sm79961136wmb.29.2019.08.01.01.37.08 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 01:37:08 -0700 (PDT) References: <20190729125755.45008-1-slp@redhat.com> <932a0c3c-b6cb-540f-ca07-1559c8fe9049@redhat.com> User-agent: mu4e 1.2.0; emacs 26.2 From: Sergio Lopez To: Laszlo Ersek In-reply-to: <932a0c3c-b6cb-540f-ca07-1559c8fe9049@redhat.com> Date: Thu, 01 Aug 2019 10:37:04 +0200 Message-ID: <871ry55ljj.fsf@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.85.128.51 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: , Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org, mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Laszlo Ersek writes: > On 07/29/19 14:57, Sergio Lopez wrote: >> Implement the modern (v2) personality, according to the VirtIO 1.0 >> specification. >>=20 >> 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. That's good to know, because I was planning to work on that (the changes are quite small, actually) in a couple weeks. ;-) > 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. > > (This should not be construed as an argument against "micro VMs" -- I > always say, identify your use case, then pick the right components for > it. I never try to convince people to use OVMF indiscriminately.) > >> For this reason, the v2 personality is disabled, keeping the legacy >> behavior as default. Machine types willing to use v2, can enable it >> using MachineClass's compat_props. > > This approach makes me happy (with the understanding that edk2 guest > firmware is not going to target the new machine type(s) in question). > > Thanks! > Laszlo --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEvtX891EthoCRQuii9GknjS8MAjUFAl1CpLAACgkQ9GknjS8M AjVT4RAAqJ4UgjOZ8/Jr21AvnmMtUbjUMegLVtcUVfI+N2qMP8J9fX49yjD65GOp OfrfN4YpfTJN1xex5fzc11ezQzQbTL72S9izSXUYBvRAx1xO4FsZ+x/r0hJlFmJl yall57aHbBFLE2XJfGJvc43EkHrQFg3sqPwx/IHdbK40IYvyn1NUEddhihy/6Hvi DABu4YtFWbVn/db2fnyFBJ+2Vj+T3LZvOFum4K+DVVlq8rnOMZaeVFuYBTAgXq7v +4aLvdO9ibaqCRIuPYSEaZd5fuPNlRlXSh7zrr9G/sVEsZlKdv5mKNWhQkzWWipb eR/ZiEU9gEmJ1LTLMIrQQu2ZixM84fluGi6kCSyJru/0CsPL8hCsDnb8jBSUrwIY sOp0nuYD1ybJZWUswtSUgji8itTf+7GlQTrffb/joS0NDXmDiN1IfhVoOqVQVzUK ij2rm7ScOyc3ZZnTkMLAIu94le2+DuuoRMPo6n3o/1HfPXNQaKwJapIS30I2jfx7 8x1+7wMBXHyZjCL4cgDB27SbTKiIfXUOd/t53Jk7lQeLyS0WzPS6cCLpH1AVatK8 SdwbUOkf0vT34yTEEkcMfZqttdaut5tQ8zUmZkrN72PpYjnI+LdhoQoo9s+59WIX GCOgGodVmkWBgAXe99chz5UJuIA6Z1GTkUX50WmNPseCL6FtY78= =KqYf -----END PGP SIGNATURE----- --=-=-=--