[Xen-devel] DQ35JO (Q35 chipset), Q6600, xen-unstable (~12/21), RMRR/DMAR error

["Peter J. van der Maas" <peter@xxxxxxxxx>]

Purchased DQ35JO on Vt-d/PCI passthrough wiki’s recommendations.  Built latest xen-unstable and am getting the following via ‘xm dmesg’:

 

(XEN) [VT-D]dmar.c:374: RMRR error: base_addr d0000000 end_address cfffffff

(XEN) Failed to parse ACPI DMAR.  Disabling VT-d.

 

 

My grub.conf looks like this:

 

        kernel /xen.gz vga=mode-0x0317 vtd=1 iommu=1

        module /vmlinuz-2.6.18.8-xen ro root=/dev/XenVolGroup/LogVolXenDom0 rhgb quiet pciback.hide=(01:00.0)

        module /initrd-2.6.18-xen.img

 

I found a similar post from a user that had same problem with same board after updating his BIOS to v954.  Not sure I want to lose the functionality the update BIOS gives me.  Any fixes or workarounds?

 

Thanks in advance,

Peter van der Maas

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