Porting the block-iscsi hotplug script

[Gustau Pérez]

> It might be that the IOMMU has an errata and Xen refuses to enable it.
> Can you provide the serial output when you try to boot Xen + FreeBSD?
> You might have to add console="com1,vga" to your xen_cmdline (although
> AFAIK that's the default).
>
   Hi Roger,

   I was able to get a dump of the output via the serial console [1]. If
I force the detection of the iommu with [2] the system is able to boot
the domU kernel and then it panics [3], it would appear it panics when
detecting atapci0. Here I'm lost.

   Greets,

   Gustau

[1] http://pastebin.com/yt27y6hM
[2] iommu=force,no-intremap
[3] http://pastebin.com/BQ8Y1ViT