Test with VT-d patches

[gg@seh.de]

Hi,

i am interested in the use of the new VT-d hardware feature.
My Dell-PC "OPTIPLEX" is capable for this.
The Linux-System was an Ubuntu-8.10 (AMD64) with the current
Linux-Kernel from the KVM-Kernel GIT repository. (2.6.27-rc4)
To use VT-d i download kvm-74 and take the patches from "Amit Shah".
1) The KVM/userspace [PATCH1/1] was applied without errors.
2) The VTD [PATCH1/2] seems already be applied.
3) The VTD [PATCH2/2] was applied without errors.

Now I use the command line option -pcidevice dev=00:03.19 to pass the
Intel Pro Gigabit Network Device to my WindowsXP Guest-System.

Qemu told me something like: "passing 00:03.19 as device 00:03.00 to the guest system". Windows starts normally fast. But then its slow rapidly down. My mouse stops for about 10sec and then goes again for 1sec.

Windows remember the new hardware correctly. And after i install the new driver, the system seems to go a little bit faster.

But the problem was, that no ping or other network packages was send/received. 

What can i do to find the problem? (Debugging?)

Regards,

Gregor Glomm