Date: Wed, 31 Oct 2012 10:33:11 -0700 From: Sean Bruno <seanbru@yahoo-inc.com> To: Bryan Venteicher <bryanv@daemoninthecloset.org> Cc: "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org> Subject: Re: dev/virtio stuff Message-ID: <1351704791.4156.5.camel@powernoodle.corp.yahoo.com> In-Reply-To: <1357075626.557.1351576292413.JavaMail.root@daemoninthecloset.org> References: <1357075626.557.1351576292413.JavaMail.root@daemoninthecloset.org>
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See below. On Mon, 2012-10-29 at 22:51 -0700, Bryan Venteicher wrote: > Hi, > > ----- Original Message ----- > > From: "Sean Bruno" <seanbru@yahoo-inc.com> > > To: freebsd-virtualization@freebsd.org > > Sent: Monday, October 29, 2012 4:49:42 PM > > Subject: dev/virtio stuff > > > > So ... I see we have virtio nowish. I've started my hackery to make > > some man(4) pages for this, but have some questions. Doing some raw > > QEMU things, I can't quite see how to get the virtio blk and net > > devices working. > > > > There are already virtio(4) man pages, but it looks like they didn't > get MFC to 9. Want me to shovel them back? > > > I've loaded the virtio drivers as modules. Is this not going to work in > > this case? I don't see the virtio versions of disk devices in /dev > > so I'm not sure what the problem here is. > > > > http://people.freebsd.org/~sbruno/virtio.txt > > >> FreeBSD 7.5-YAHOO-20121028 #0 ybsd_9@324991: Sun Oct 28 22:08:46 UTC 2012 > >> kernel@yahoo-inc.com:/sys/amd64/compile/YAHOO amd64 > > I assume this is 9-STABLE'ish? > Yah, its pretty close to stable/9 +- 1 or to commits. > >> virtio_pci0: <VirtIO PCI Block adapter> port 0xc200-0xc23f irq 11 at device 4.0 on pci0 > >> vtblk0: <VirtIO Block Adapter> on virtio_pci0 > >> virtio_pci0: host features: 0x41000014 <NotifyOnEmpty,DiskGeometry,MaxNumSegs> > >> virtio_pci0: negotiated features: 0x14 <DiskGeometry,MaxNumSegs> > >> vtblk0: 4096MB (8388608 512 byte sectors) > > The VirtIO block gets probed and attached correctly, and right after the > last printf, hands off to disk_create(9) to create the GEOM plumbing and > device. VirtIO block devices get created as vtbdX, not as ad, ada, or da. > > Can you see if g_disk_create() gets called (with flag==EV_CANCEL)? > What does a verbose boot show? > > Bryan Grabbed a verbose dmesg for you here: http://people.freebsd.org/~sbruno/viritio_dmesg.txt Sean
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