Re: [Xen-users] PCI Passthrough without VT-d

[Paolo Rivetti <natecult@xxxxxx>]

Thanks Pasi, now works. I used 'guestdev =' which replaced 'reassigndev ='

(http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/a3ad7a5f2dcd)

My final configuration now is:

title CentOS (2.6.18.8-xen-d2)

        root (hd0,0)

        kernel /xen.gz

        module /vmlinuz-2.6.18.8-xen-d2 ro root=/dev/vg0/lv0 rhgb quiet noreboot dom0_mem=1024M pciback.permissive pciback.hide=(01:00.0) guestdev=01:00.0 reassign_resources

        module /initrd-2.6.18.8-xen-d2.img

It was a great effort, but eventually it works. Xen offers a lot of functionality but is very complex!

On Mar 21, 2010, at 9:56 PM, Pasi Kärkkäinen wrote:

On Sun, Mar 21, 2010 at 09:19:44PM +0100, Paolo Rivetti wrote:

  I can not assign the PCI card to the PV guest.

  When I start the machine I get the error: non-page-aligned MMIO BAR found

  I have the same configuration

  I'm using CentOS 5.4 and Xen 3.4.2

  I recompiled the kernel enabling PCI Backend inside the kernel (not as

  module) and PCI Backend Mode to Passthrogh.

  This is my grub.conf configuration

  title CentOS (2.6.18.8-xen-d2)

          root (hd0,0)

          kernel /xen.gz

          module /vmlinuz-2.6.18.8-xen-d2 ro root=/dev/vg0/lv0 rhgb quiet

  noreboot dom0_mem=1024M pciback.permissive pciback.hide=(0000:01:00.0)

          module /initrd-2.6.18.8-xen-d2.img

  xm create -c /etc/xen/of0

  Using config file "/etc/xen/of0".

  Error: pci: 0000:01:00.0: non-page-aligned MMIO BAR found.

  There are a lot of emails on the internet, but few solutions, some have no

  idea what it is?

Did you try the reassigndev= option?

That should fix the "non-page-aligned MMIO BAR found" issue.

-- Pasi

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