Xen devel - Dec 2009 - Vt-d: problem passthrough a PCI ISDN-board in WIndowsXP HVM domU with 3.5-unstable

Hi all,

yesterday I''ve build the latest xen-unstable on top of a Ubuntu 9.10
x64 server.
Now I setup a XP domU (same problem occurs also with Windos 7 domU) and
passthrough a PCI device (ISDN board) into this domU.
This is basically working and the device is shown in device manager BUT the
device lacks the SUBSYS part of the device Id and therefore the device
can''t be installed or the driver itself failed to load afterwards.

Example:
device Id found on "real" system:
PCI\VEN_1397&DEV_08B4&SUBSYS_B5401397

device Id in HVM domU: PCI\VEN_1397&DEV_08B4&SUBSYS_00000000



This seems to be some sort of regression, because with 3.4.1 (around two month
ago) I was able to install the driver and communicate with the same device in a
XP domU but had some stability issues, which I now wanted to sort out...



Any helpful hints are highly appreciated :-)



If any additional logs/informations are needed please let me know.



Thanks in advance!

Ralf Bonenkamp







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On Wed, Dec 02, 2009 at 04:35:44PM +0100, Ralf Bonenkamp
wrote:
> Hi all,
> 
> yesterday I''ve build the latest xen-unstable on top of a Ubuntu
9.10 x64 server.
> Now I setup a XP domU (same problem occurs also with Windos 7 domU) and
passthrough a PCI device (ISDN board) into this domU.
> This is basically working and the device is shown in device manager BUT the
device lacks the SUBSYS part of the device Id and therefore the device
can''t be installed or the driver itself failed to load afterwards.
> 
> Example:
> device Id found on "real" system:
PCI\VEN_1397&DEV_08B4&SUBSYS_B5401397
> 
> device Id in HVM domU: PCI\VEN_1397&DEV_08B4&SUBSYS_00000000
> 
> 
> 
> This seems to be some sort of regression, because with 3.4.1 (around two
month ago) I was able to install the driver and communicate with the same device
in a XP domU but had some stability issues, which I now wanted to sort out...
> 
> 
> 
> Any helpful hints are highly appreciated :-)
> 
> 
> 
> If any additional logs/informations are needed please let me know.
Hi Ralf,

I''m having some trouble reproducing this problem.
Could you be a bit more specific about which versions
of xen-unstable and qemu-xen-unstable (aka tools/ioemu-remote)
you are using:

cd $XEN_SOURCE_DIR
$ hg tip
$ (cd tools/ioemu-remote && git log -1;)

Also, which dom0 kernel are you running?


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