Re: IOMMU and AMD 890fx

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Thu, Jun 17, 2010 at 12:09:31AM +0200, Jens Krehbiel-Gräther wrote:
> Hi!
> 
> I now have a Asus Crosshair IV for testing and this board (as I
> postet earlier) supports iommu. Now I have installed Debian lenny
> (5.0) and compiled xen 4.0.0.
> Xen is running now and I have installed a hvm debian lenny to which
> I would like to bind a pci device but that doesn't work.
> Perhaps I am doing something wrong and you could help me?

Is that the _only_ PCI device you have tried to assign? Did you try to
assign other PCI devices which have the function number being zero?
> and xm dmesg this:
> 
> (XEN) domctl.c:853:d0 XEN_DOMCTL_assign_device: assign device
> (0:14.2) failed

That is not very useful. Wish it gave you the return code at least.
If you are comfortable with adding printks in the Xen hypervisor I would 
modify it a bit to see what was the 'ret' value and why
'intel_iommu_assign_device' function failed.

> 
> 
> So can anyone tell me what I am doing wrong??

Please also attach the full serial long, including the Xen one - and run
it with 'loglvl=all iommu=verbose'.