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xen-users
Re: [Xen-users] pciback and pci passtrought problems
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Hi Velten,
On 5 Mar 2009, at 20:09, Velten Spägele wrote:
so can i use the last xen release only with very special Hardware,
or would it be possible to use it like in the older versions ?
I have the same problem, but it has nothing to do with PCI passthrough
in general. It seems to be a problem with passing devices in a
specific state to a DomU.
I currently have a DomU which gets all the USB controllers on my
mainboard passed through, or at least is supposed to. However, when I
start up the domain it complains about device 00:13.2, which is an USB
EHCI controller and I think the only controller that has a device
connected to it, because that device does not show up in lsusb inside
the DomU. The second Controller (or rather the first, 00:12.2) works
fine. I haven't been able to test what happens if I unplug the device,
the case LCD to be more precise, because the system is currently
running and I don't like working inside running systems, so this is
only a hunch.
In your case, the device might be in that (undesired) state, because
it was already initialized/used by a device driver in Dom0, so the
first thing to try would be to use a kernel with pciback built in.
That way, it will be able to grab your PCI devices on boot as you
specified on the command-line (which shouldn't do much right now). An
alternative would be to blacklist the device driver module (8139too in
your case), to prevent the system from loading it automatically on
boot. However, in both cases, you will not be able to start up your
DomU again without rebooting, after you try to use it in Dom0.
If that does not help, removing that specific device from the DomU
"fixes" the problem for me and my DomU starts up normally with all the
other devices visible inside. Since the device that causes the problem
on your system is a NIC, this might be a good idea anyways, since you
will need it in Dom0 with a bridge and a virtual NIC in your Fli4L
DomU in order to have other DomUs and Dom0 access your LAN (if you're
doing what I think you are :) ).
I hope this helps you a little,
Paul.
- --
Paul Schulze
Mail: avlex82@xxxxxxxxx
Why can't a programmer tell the difference between Halloween and
Christmas?
Because OCT31 = DEC25.
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