Re: Problem with pv-ops dom0 and pci-stub to hide devices: improper device assignment specified

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

On Mon, Oct 12, 2009 at 06:48:11PM -0600, Cinco, Dante wrote:
> I followed the procedure for "binding devices to pci-stub" but when I ran "xm pci-list-assignable-devices," no device showed up. I can see the device though in /sys/bus/pci/drivers/pci-stub/ and "lspci -v -s 0:07:0.1" reports the driver in use as pci-stub. When I tried to bringup the domU (Linux 2.6.30.1), I get an error message:

What is the Dom0 you are using? There is no support yet in 2.6.30.1 for the pciback (I am working on this
right now, testing it to be exact).

Nor is there a pci-front in the 2.6.31.1.

Why use pci-stub? It just hides devices, but does not do anything else?

> 
> Error: pci: improper device assignment specified: pci: 0000:07:00.0 must be co-assigned to the same guest with 0000:07:00.0, but it is not owned by pciback.
> 
> I'm only bringing up one domU so I don't quite understand the error message.
> 
> Here's a breakdown of my steps:
> 
> ls -ltr /sys/bus/pci/drivers/pci-stub/
> total 0
> --w------- 1 root root 4096 Oct  9 05:29 unbind
> --w------- 1 root root 4096 Oct  9 05:29 uevent
> --w------- 1 root root 4096 Oct  9 05:29 remove_id
> --w------- 1 root root 4096 Oct  9 05:29 new_id
> --w------- 1 root root 4096 Oct  9 05:29 bind
> 
> lspci -n|grep 8032
> 07:00.0 0c04: 11f8:8032 (rev 05)
> 
> echo "11f8 8032" > /sys/bus/pci/drivers/pci-stub/new_id
> echo "0000:07:00.0" > /sys/bus/pci/devices/0000:07:00.0/driver/unbind
> echo "0000:07:00.0" > /sys/bus/pci/drivers/pci-stub/bind
> 
> lspci -v -s 0:07:0.0 | grep driver
>         Kernel driver in use: pci-stub
> 
> ls -ltr /sys/bus/pci/drivers/pci-stub/
> total 0
> --w------- 1 root root 4096 Oct  9 05:29 uevent
> --w------- 1 root root 4096 Oct  9 05:29 remove_id
> --w------- 1 root root 4096 Oct  9 05:30 unbind
> --w------- 1 root root 4096 Oct  9 05:30 new_id
> --w------- 1 root root 4096 Oct  9 05:30 bind
> lrwxrwxrwx 1 root root    0 Oct  9 05:30 0000:07:00.0 -> ../../../../devices/pci0000:00/0000:00:09.0/0000:07:00.0
> 
> xm pci-list-assignable-devices
> (Nothing)
> 
> xm create -c /root/cfg
> (vcpus=1)
> (device_model = 'qemu-dm')
> (pci=['07:00.0'])
> Error: pci: improper device assignment specified: pci: 0000:07:00.0 must be co-assigned to the same guest with 0000:07:00.0, but it is not owned by pciback.
> 
> (XEN) Latest ChangeSet: Thu Oct 08 09:24:32 2009 +0100 20296:1d7221667204
> 
> dom0 kernel: 2.6.31.1
> 
> Thanks in advance.
> 
> Dante
> 

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