Kay, Allen M wrote:
> Does this happen during xen/dom0 boot time or during HVM guest boot?
> 
> Are you using and desktop or server platform?  Are you using the latest
> BIOS?  Some older BIOS does not initialize VT-d HW properly.
> 
> Allen
> 

It's a server platform, I could indeed check if it is the latest bios.

This is happen during the HVM guest boot, all initialisation in dom0 are 
ok. The device I tried to pass-through was a pci NIC.

I have tried to pass-through a PCIe NIC and it works better, I mean the 
hvm guest boot. The NIC card is well detected by the hvm guest but, 
there is still a problem. When I tried to get an ip address from dhcp I 
received a storm of "iommu_page_fault" (enclosed the log).

The pci device I try to pass-through is at the address 8:0:0.

I have disable the pci msi in the guest.

Thanks,

-- 
Jean Guyader