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



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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