Re: [Xen-devel] RE: xen-unstable pci passthrough

Dear Magee,

Just to confirm, are you using Intel DQ45CB? As there are already too many postings in this xen-devel mailing list, it is difficult to go back to check.

So you are using PCI-e x16 as primary video controller? If you want to try 2.6.18.8 non-pvops dom0 kernel, you can use my kernel config which I have just posted earlier.

Do share with us the results.

Thank you!

-- 
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
Company Website: http://www.asiasoft.sg/
Mobile: +65-9648-9798
MSN: teoenming@xxxxxxxxxxx
Alma Maters: Singapore Polytechnic, National University of Singapore

On 09/03/2009 11:07 PM, djmagee@xxxxxxxxxxxx wrote:

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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Re: [Xen-devel] RE: xen-unstable pci passthrough