[Xen-users] pci passthru not working after 4.0.1 > 4.1.0 upgrade

[Andrew Lyon <andrew.lyon@xxxxxxxxx>]

Hi,

I've just upgraded to 4.1.0 from 4.0.1 and found that one of my hvm's
failed to start due to pci passthru failure:

xm create xen-win7.cfg
Using config file "./xen-win7.cfg".
Error: pci: PCI Backend and pci-stub don't own sibling device
0000:00:00.0 of device 0000:02:01.1

Setting from guest config file:

pci = [ '0000:02:01.0', '0000:02:01.1', '0000:02:01.2' ]

02:01.0 USB Controller: NEC Corporation USB (rev 43)
02:01.1 USB Controller: NEC Corporation USB (rev 43)
02:01.2 USB Controller: NEC Corporation USB 2.0 (rev 04)

It worked before, and the device is listed as available to be assigned:

xm pci-list-assignable-devices
0000:02:01.0
0000:02:01.1
0000:02:01.2

 lspci -tv
-[0000:00]-+-00.0  Intel Corporation 5400 Chipset Memory Controller Hub
           +-01.0-[01-02]----00.0-[02]--+-01.0  NEC Corporation USB
           |                            +-01.1  NEC Corporation USB
           |                            \-01.2  NEC Corporation USB 2.0
           +-05.0-[03]----00.0  nVidia Corporation G96 [Quadro FX 380]
           +-09.0-[04-07]--+-00.0-[05-06]----00.0-[06]----00.0  Adaptec AAC-RAID
           |               \-00.3-[07]--+-02.0  LSI Logic / Symbios
Logic 53c1010 Ultra3 SCSI Adapter
           |                            \-02.1  LSI Logic / Symbios
Logic 53c1010 Ultra3 SCSI Adapter
           +-0f.0  Intel Corporation 5400 Chipset QuickData Technology Device
           +-10.0  Intel Corporation 5400 Chipset FSB Registers
           +-10.1  Intel Corporation 5400 Chipset FSB Registers
           +-10.2  Intel Corporation 5400 Chipset FSB Registers
           +-10.3  Intel Corporation 5400 Chipset FSB Registers
           +-10.4  Intel Corporation 5400 Chipset FSB Registers
           +-11.0  Intel Corporation 5400 Chipset CE/SF Registers
           +-15.0  Intel Corporation 5400 Chipset FBD Registers
           +-15.1  Intel Corporation 5400 Chipset FBD Registers
           +-16.0  Intel Corporation 5400 Chipset FBD Registers
           +-16.1  Intel Corporation 5400 Chipset FBD Registers
           +-1b.0  Intel Corporation 631xESB/632xESB High Definition
Audio Controller
           +-1c.0-[08]--+-00.0  Intel Corporation 82575EB Gigabit
Network Connection
           |            \-00.1  Intel Corporation 82575EB Gigabit
Network Connection
           +-1d.0  Intel Corporation 631xESB/632xESB/3100 Chipset UHCI
USB Controller #1
           +-1d.1  Intel Corporation 631xESB/632xESB/3100 Chipset UHCI
USB Controller #2
           +-1d.2  Intel Corporation 631xESB/632xESB/3100 Chipset UHCI
USB Controller #3
           +-1d.3  Intel Corporation 631xESB/632xESB/3100 Chipset UHCI
USB Controller #4
           +-1d.7  Intel Corporation 631xESB/632xESB/3100 Chipset EHCI
USB2 Controller
           +-1e.0-[09]--+-04.0  VIA Technologies, Inc. VT82xxxxx UHCI
USB 1.1 Controller
           |            +-04.1  VIA Technologies, Inc. VT82xxxxx UHCI
USB 1.1 Controller
           |            +-04.2  VIA Technologies, Inc. USB 2.0
           |            \-08.0  Texas Instruments TSB43AB22/A
IEEE-1394a-2000 Controller (PHY/Link)
           +-1f.0  Intel Corporation 631xESB/632xESB/3100 Chipset LPC
Interface Controller
           +-1f.1  Intel Corporation 631xESB/632xESB IDE Controller
           +-1f.2  Intel Corporation 631xESB/632xESB/3100 Chipset SATA
IDE Controller
           \-1f.3  Intel Corporation 631xESB/632xESB/3100 Chipset
SMBus Controller

I am running kernel 2.6.38 xenified with suse patches, not pv_ops,
using the pciback.hide syntax to hide the device from dom0 drivers.

I did some testing and I can passthru 0000:02:01.0 but not the other
two functions of the usb card.

Andy

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