I had a little bit of time to
work on this the other night. As the revised passthrough patch had
already been applied to xen-unstable, I only had to apply the qemu branch.
When I tried to passthrough my
video device with gfx_passthru=2, the guest BIOS never seemed to execute.
Xm dmesg, went as far as “Loading ROMBIOS”, but no further. When guests
successfully start, I can see the bios messages in xm dmesg, and that was not
the case. I tried leaving the vnc enabled to see if there was any output,
and all I had was some qemu monitor and it was not clear what I was supposed to
do there. I was attempting to passthrough my addon card, which is the
only graphics device enabled in my system.
I then tried to passthrough the
graphics device without the gfx_passthru option just to make sure the guest
would boot properly. I was immediately hit with a dom0 kernel BUG and at
that point I had no more time to experiment.
This test was while I was
running a xenified 2.6.29.6 kernel, which has been perfectly stable for me in
all my other uses. I want to try with a 2.6.18.8-xen kernel as
well. Hopefully I’ll get a chance this afternoon. I built and
tested a 2.6.31-rc6 dom0 kernel the other day but it was difficult to use as
there was really high latency over my ssh connection for some reason and the
machine was generally unresponsive.
When I have time to fully test
all of these combinations I will report back with the results.
From: Teo En Ming (Zhang
Enming) [mailto:enming.teo@xxxxxxxxxxxxxxx]
Sent: Thursday, September 03, 2009 12:12 AM
To: djmagee@xxxxxxxxxxxx; 'Han, Weidong'; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] RE: xen-unstable pci passthrough
Dear Magee,
Any luck with the Intel vga passthrough patches to xen 3.5-unstable
on Intel DQ45CB with extra PCI-e x16 graphics card? Are you using pvops dom 0
kernels 2.6.30-rc3 and 2.6.31-rc6?
Regards,
Mr. Teo En Ming (Zhang Enming)
Dip(Mechatronics Engineering) BEng(Hons)(Mechanical Engineering)
Technical Support Engineer
Information Technology Department
Asiasoft Online Pte Ltd
Tampines Central 1 #04-01 Tampines Plaza
Singapore 529541
Republic of Singapore
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
From:
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of djmagee@xxxxxxxxxxxx
Sent: Wednesday, September 02, 2009 6:59 PM
To: Han, Weidong; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] RE: xen-unstable pci passthrough
That was the problem, thank
you. Now I’ll work on testing the gfx-passthrough patches.
From:
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Han, Weidong
Sent: Tuesday, September 01, 2009 6:55 PM
To: djmagee@xxxxxxxxxxxx; 'xen-devel@xxxxxxxxxxxxxxxxxxx'
Subject: [Xen-devel] RE: xen-unstable pci passthrough
I suspect you are using old hvm config file. The device_model is
changes in config file.
in old config file:
# New stuff
device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
in new config file:
# Device Model to be used
device_model = 'qemu-dm'
Pls check it, and use the latest config file to create guest.
Regards,
Weidong
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of djmagee@xxxxxxxxxxxx
Sent: 2009年9月2日 6:40
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] xen-unstable pci passthrough
I have not been able to passthrough any PCI devices using
the latest xen-unstable. I have a DQ45CB, and have successfully passed
devices to guests using 3.4.1.
The latest c/s in my copy of xen-unstable is 20145. I
just started playing around with unstable yesterday, so I can’t tell you if
earlier revisions worked. I’ve tried with various dom0 kernels, the
current 2.6.18.8-xen branch, a xenified 2.6.29.6, and a pvops 2.6.31-rc6, and
in every case I get the same error. I’ve tried both putting pci= in the
config file, and hot-adding the device using xm pci-attach. In every
case, the xm command (either create or pci-attach) fails with the message
“Error: Timed out waiting for device model action”. The guests in every
case are HVM guests, some flavors of Windows, as well as the Knoppix 5.3.1 DVD.
The relevant xm dmesg output is:
(XEN) PCI add device 00:1b.0
(XEN) [VT-D]iommu.c:1292:d0 domain_context_unmap:PCIe: bdf =
0:1b.0
(XEN) [VT-D]iommu.c:1178:d0 domain_context_mapping:PCIe: bdf
= 0:1b.0
(XEN) [VT-D]io.c:284:d0 VT-d irq bind: m_irq = 37 device = 3
intx = 0
(XEN) [VT-D]iommu.c:1292:d0 domain_context_unmap:PCIe: bdf =
0:1b.0
(XEN) [VT-D]iommu.c:1178:d0 domain_context_mapping:PCIe: bdf
= 0:1b.0
And the messages from qemu-log:
dm-command: hot insert pass-through pci dev
hot add pci slot -2 exceed.
Please let me know what else I need to supply to help
resolve this problem. If I need to enable debugging messages, let me know
the best way to do this.
Doug Magee
djmagee@xxxxxxxxxxxx
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