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[Xen-devel] RE: Some questions of VT-D graphic passthrough

To: 'wei zhou' <weizhou.sir@xxxxxxxxx>
Subject: [Xen-devel] RE: Some questions of VT-D graphic passthrough
From: Tim Moore <timothy.moore@xxxxxxxxxxx>
Date: Wed, 15 Apr 2009 11:41:54 +0100
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Thread-topic: Some questions of VT-D graphic passthrough

Answers inline below.


   I heard the good news you published from Xen Maillist.That really inspired me. Recently i was working on vt-d graphic passthrough  experiment. That was a real tough job for me. I faced some problems that you may also met before. So i hope you can give me any advises or informaitons.
   Any reply  appreciated!

  Q35 matherboard + PCIE NVIDIA 9400 + PCI ATI R128 + IGD Intel
                   Two Monitors connected with respective cards
           :  Domain0 (Gentoo X86_64 2.6.28)
                   DomainU (Ubuntu i386 / windows xp / RedHat Ent4.5)

At first ,I assumed the Matherboard integrated graphic card for Domain0 then passthrough the PCIE NVIDIA graphic card for DomainU.
But My Matherboard cann't support those two cards work together.
 And Everytime i use the PCIE card render for Domain0, the VT-D can't be Enable Because of the RMMR incorrect.





Use this work around and (/* the whole “if” section */) and recompile Xen


I think VT-d is needed for this to work …

Considered that reason , the PCIE card was aborted in my experiment.
Now I use the integrated card as the primary card ,the ATI PCI graphic card as the secondly.
Now i face the problem is that the DomainU asigned the ATI card can't displaied on the Monitor connected with the ATI card.

From you information on Xen maillist,
you passthrough the PCIE NVIDIA card to DomainU --> boot from console
  --> setup the proper driver for that card --> startx --> then the DomainU display on the second Monitor
Any other works ?
Is that right?  You didn't change any source codes. The whole process are works about configurations.
I tried install a R128 driver in DomainU for the ATI card and Modified the xorg.conf(/etc/X11/xorg.conf) to tell the DomainU use the ATI card do render work.
whatever i do the DomainU always stay on the same screen.

Now i have none idea for the next step .
Hope you can give me some help.

Thanks so much !

Best regards
E-mail: weizhou.sir@xxxxxxxxx

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