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[Xen-users] What does 'non-page-aligned MMIO BAR found' mean and can I fix it?


  • To: <xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "Ian Carr" <icarr@xxxxxxxxxxxxxxxxx>
  • Date: Sat, 20 Sep 2008 18:46:39 +0100
  • Delivery-date: Sat, 20 Sep 2008 10:47:21 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AckbSNQcJ3mOBK++R1KX3Mv3L9CyvA==

I am using Xen 3.3.0 and trying to expose a PCI resource to a domU. I have
managed to hide the resource in dom0 by assigning it to pciback. But when I
try and start the domU with the pci = [ '00:12.0' ] line in the config I get
the message:

        pci: 0000:00:12.0 non-page-aligned MMIO BAR found.

(actually I was getting the message about the illegal format character in
pciif.py but having corrected that I now get the message above)

Can anyone tell me what it means and is there anything I can do about it?

The device is a via_rhine Rhine II Ethernet adaptor on a via Epia SN
motherboard. Operating system is Debian Etch for both dom0 and domU. Dom0 is
using the 2.6.18.8 kernel and Xen itself from a Xen source build.

Many thanks

Ian

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