[Xen-users] Xen 3.0.3, AMD and PCI passthrough

[Kalle Happonen <kalle.happonen@xxxxxxx>]

Hello all,

I'm running Xen on a HP DL385G6 machine. I use Centos 5.4 on the dom0, 
which comes with the seemingly old 3.0.3 (accoring to rpm) version of 
xen.(Although another thread just said: RHEL5 has Xen hypervisor version 
3.1.2 + tools version 3.0.3.)
The machine runs a pair of AMD Istanbuls (Six-Core AMD Opteron(tm) 
Processor 2431). I have an Ininiband card on the machine which I would 
like to pass on to a domU. When I try to attach the pci device to the 
domu, I get the following output though..
xm pci-attach jade 0000:48:00.0
Error: failed to assign device: maybe the platform doesn't support VT-d, 
or VT-d isn't enabled properly?
Usage: xm pci-attach <Domain> <domain:bus:slot.func> [virtual slot]

Insert a new pass-through pci device.

If I have understood correctly, this new AMDs should support it though. 
The virtualization option has been enabled in the BIOS.
Looking at xm dmesg, however, I get the following

...
(XEN) HVM: SVM enabled
(XEN) HVM: Hardware Assisted Paging detected and enabled.
(XEN) I/O virtualisation disabled
...

I have tried adding "amd_enable_iommu=1" to grub, but it doesn't seem to 
help. Is the version of xen too old to support this? If so, how big of a 
task is it to upgrade xen, and which version would be required? Sticking 
with the stock version would be nice from the security update point of view.
Thanks,
Kalle Happonen

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users