[Xen-users] Error: failed to assign device...VT-d isn't enabled properly(?)

["Ralf Hornik Mailings" <ralf@xxxxxxxxxxxxxxxxx>]

Dear List,

I need to make an Aladdin eToken Pro visible in a Linux guest HVM, but  
I cannot assign the device to any domU, while it's being blocked by  
the dom0.
To avoid this trouble I would like to pass the whole USB bus to the  
domU directly, via PCI passthrough.
Now I use xen 3.3.0 from xensource and xen kernel from Ubuntu 8.04  
2.6.24-19-xen, because the xensource xen kernel (2.6.18) does not  
support my hardware completely.
while installing xen and tools anything seems to by fine:

*** PCI passthrough capability has been enabled ***

But when I hide the PCI which does the kernel:

[    0.000000] Command line: root=/dev/mapper/sys_vol-sys_root ro  
console=tty0 it821x_noraid=1 selinux=0 pci=routeirq  
pciback.hide=(00:1d.0)
[    1.179637] Kernel command line: root=/dev/mapper/sys_vol-sys_root  
ro console=tty0 it821x_noraid=1 selinux=0 pci=routeirq  
pciback.hide=(00:1d.0)
[    0.114939] ACPI: bus type pci registered
[    0.149559] PCI: Routing PCI interrupts for all devices because  
"pci=routeirq" specified
[    0.177791] pciback 0000:00:1d.0: seizing device
[    0.141957] Allocate Port Service[0000:00:1c.0:pcie00]

I can not use it in domU:

~# xm create domU
Error: failed to assign device: maybe the platform doesn't support  
VT-d, or VT-d isn't enabled properly?
As I googled, I figured out, that only a couple of boards support vt-d  
or iommu, but pci passthrough is widely common.
xm dmesg shows:

(XEN) I/O virtualisation disabled

Also, a friend told me, on its (pci passthrough working) machine the  
same message appears. AND, any documantation regarding this feature  
dosn't mention vt-d at all:
http://www.wlug.org.nz/XenPciPassthrough
http://www.google.de/search?q=xen+pci+passthrough

So, what does the error mentioned in my subject mean? Is it a wrong  
interpreted issue by the kernel, or do I really need vt-d, which my  
board obviously does not support? (ECS G31T-M with core 2 quad q6600)
OR, is there another (more easy) solution to make the usb eToken  
visible in domU HVM?
One more question: Is there a newer Kernel available soon (>2.6.22)  
from xensource?
Thank you and best regards


Ralf
--
alles bleibt anders...



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