RE: [Xen-devel] Problem with pv-ops dom0 and pci-stub to hide devices: improper device assignment specified

["Han, Weidong" <weidong.han@xxxxxxxxx>]

Dante,

 

I guess 07:00.0 and 07:00.1 are two PCI (non-PCIe) devices in your system. PCI devices under the same bridge must be assigned to one guest. Pls hide both of them by pci-stub, then you can assign both of them to a guest, or just assign one. Pls attach the output of 'lspci -vvv'.

 

Regards,

Weidong

---

From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Cinco, Dante
Sent: 2009年10月13日 8:48
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] Problem with pv-ops dom0 and pci-stub to hide devices: improper device assignment specified

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:

 

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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