Re: [Xen-users] Xen 3.2.1 and PCI passthrough

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

--[ UxBoD ]-- wrote:
> Hi,
>
> Have just brought a Digium TDM400P card for my Asterisk server but appear to 
> be having trouble getting it to be hidden from DOM-0.  Here is what dmesg 
> shows :-
>
> pciback 0000:02:07.0: Driver tried to write to a read-only configuration 
> space field at offset 0x44, size 2. This may be harmless, but if you have 
> problems with your device:
> 1) see permissive attribute in sysfs
> 2) report problems to the xen-devel mailing list along with details of your 
> device obtained from lspci.
> PCI: Enabling device 0000:02:07.0 (0000 -> 0003)
> ACPI: PCI Interrupt 0000:02:07.0[A] -> GSI 26 (level, low) -> IRQ 20
> ACPI: PCI interrupt for device 0000:02:07.0 disabled
> pciback: vpci: 0000:02:07.0: assign to virtual slot 0
> PCI: Enabling device 0000:02:07.0 (0000 -> 0003)
>
> and from the lspci :-
>
> 02:07.0 Network controller: Tiger Jet Network Inc. Tiger3XX Modem/ISDN 
> interface
>       Subsystem: Unknown device b100:0001
>       Flags: bus master, medium devsel, latency 64, IRQ 20
>       I/O ports at a800 [size=256]
>       Memory at fc7ff000 (32-bit, non-prefetchable) [size=4K]
>       Capabilities: [40] Power Management version 2
>
> In my rc.local I have the following :-
>
> modprobe pciback
> sleep 2
> SLOT=0000:02:07.0
>   

You missed.

echo -n $SLOT > /sys/bus/pci/drivers/<driver>/unbind

> echo -n $SLOT > /sys/bus/pci/drivers/pciback/new_slot
> echo -n $SLOT > /sys/bus/pci/drivers/pciback/bind
>
> Does this look okay ? or should I contact the devel list ?
>   

You better need to use your /etc/modprobe.conf to hide the device while
pciback module is loaded to the kernel. I have the below two lines in my
/etc/modprobe.conf to hid a broadcom network card which uses bnx2 driver.

install bnx2 /sbin/modprobe pciback ; /sbin/modprobe --first-time
--ignore-install bnx2
options pciback hide=(0000:09:00.0) verbose_request=1

--Sadique

>
> Regards,
>
>   


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