[Xen-devel] 82576 VF passthrough

[Satish Chowdhury <satish.chowdhury@xxxxxxxxxxxxxxxxxx>]

Hi,

I am trying to setup 82576 VF passthrough to pv domU non Vt-d machine . My dom0 is http://hg.vergenet.net/xen/linux-2.6.18-xen-igb/  kernel on FC11 and 3.4.1 Xen.  My domU  is also  http://hg.vergenet.net/xen/linux-2.6.18-xen-igb/ kernel on Ubuntu junty.


Passthrough of PF device (igb driver) is successful in my setup. I could see the PF BDF on domU, and the igb driver gets loaded on domU.

But, when I do passthrough of VF device, lspci output on DomU doesn't show the VF device.(CONFIG_XEN_PCIDEV_FRONTEND=y)

The steps I follow on Dom0:
 #rmmod igb
 #modprobe igb max_vfs=1
 #modprobe pciback
 #echo -n VF-BDF > /sys/bus/pci/drivers/pciback/new_slot
 #echo -n VF-BDF > /sys/bus/pci/drivers/pciback/bind

On domU config file has  pci = [' VF-BDF'] . 

The domU starts without any errors.

#xm pci-list domU-ID 
shows the VF BDF

Am i missing some thing of VF Passthrough? Please give me pointers to find/debug the issue.

Regards,
-Satish





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