[Xen-users] Need clarifications: Xen and winXP HVM: pci direct access, USB, desktop resolution

[kadafax <kadafax@xxxxxxxxx>]

Hi list,
I'm totally new at xen and apologize for my ignorance. What I'm trying 
to do is the following:
I've got a laptop with core 2 duo cpu.
Dom0: Fedora Core 6.
Dom1: WinXP HVM

I want to give the Dom1 full access to the wifi card, and the 
possibility to use USB pen drive. So I've hidden the pci address 
(according to lspci output) in the kernel's line:
kernel /xen.gz-2.6.18-1.2849.fc6 pciback.permissive pciback.hide=(0c:00.0)

and added the following in the dom1's config file:
pci=['0c,00,0']


The result when I 'xm create windows':

Error: pci: failed to locate device and parse it's resources - [Errno 2] No 
such file or directory: '/sys/bus/pci/devices/0000:0c:00.0/driver'

I've tried the same with a USB controller to the HVM with the same 
result. But it wasn't a missing files problem:
Error: pci: PCI Backend does not own device 0000:00:1d.0
See the pciback.hide kernel command-line parameter or
bind your slot/device to the PCI backend using sysfs


So it's here that I need some clarifications, because I've seen some 
posts wheres people were talking about successfully attaching a usb 
printer and some telling that it was impossible in a HVM to give direct 
access to hardware (fully virtualized so there is a need to develop none 
open source drivers etc...).

My second problem is surely independent from the above. It is that I 
want a bigger desktop resolution in winXP and that the cirrus emulated 
card only show to the os 4mb of VRAM. I've tried the stdvga=1 in the 
config file but then the HVM wont boot (blank screen after bios 
informations).
I must be totally wrong somewhere...
Thanks for any input.
Regards,
kfx

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