Peter J. van der Maas
2008-Dec-23 05:29 UTC
[Xen-devel] DQ35JO (Q35 chipset), Q6600, xen-unstable (~12/21), RMRR/DMAR error
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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Keir Fraser
2008-Dec-23 08:45 UTC
Re: [Xen-devel] DQ35JO (Q35 chipset), Q6600, xen-unstable (~12/21), RMRR/DMAR error
You could remove the check at the top of acpi_parse_one_rmrr() in xen/drivers/passthrough/vtd/dmar.c and then cross your fingers. It depends just how broken the BIOS tables are. -- Keir On 23/12/2008 05:29, "Peter J. van der Maas" <peter@pjv-c.com> wrote:> Purchased DQ35JO on Vt-d/PCI passthrough wiki¹s recommendations. Built latest > xen-unstable and am getting the following via xm dmesg¹: > > (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?_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel