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xen-devel
Re: [Xen-devel] DQ35JO (Q35 chipset), Q6600, xen-unstable (~12/21), RMRR
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To: |
"Peter J. van der Maas" <peter@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] DQ35JO (Q35 chipset), Q6600, xen-unstable (~12/21), RMRR/DMAR error |
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From: |
Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
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Date: |
Tue, 23 Dec 2008 08:45:08 +0000 |
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[Xen-devel] DQ35JO (Q35 chipset), Q6600, xen-unstable (~12/21), RMRR/DMAR error |
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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@xxxxxxxxx> wrote:
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?
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