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Re: [Xen-users] Re: VT-D On An Asus P5E-VM DO

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Subject: Re: [Xen-users] Re: VT-D On An Asus P5E-VM DO
From: Michael MacLeod <mikemacleod@xxxxxxxxx>
Date: Wed, 23 Sep 2009 10:25:01 -0400
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On Wed, Sep 23, 2009 at 8:10 AM, Christian Tramnitz <chris.ace@xxxxxxx> wrote:
Michael MacLeod wrote:
I've tried several different BIOS revisions (currently my BIOS is flashed with 0702). Did you build Xen from source and what version are you running? And would you mind posting your relevant grub menu.lst entry? I want to see what options you're passing to Xen at boot.

Still, it's good to know that it should be possible to work around this problem and make it work.

I was running an old 3.4.0-pre but just gave it a try with latest 3.5-unstable, with the same result. Both were built from source.

kernel /boot/xen.gz iommu=1 iommu_inclusive_mapping=1
module /boot/vmlinuz-2.6.29-xen-r1 root=/dev/md3 ro pciback.hide=(01:01.0)

That's essentially the same menu.lst entry I use, but to no avail. Did you pass any particular options to Xen when you built it? I just followed the basic instructions in the README; make world, make install, reboot, basically.

Would you mind telling me what output you get from these two commands:
acpidump | grep -B3 -A20 DMAR
acpidump -t DMAR

The DMAR table seems to be what VT-D uses for mapping memory, and on my BIOS appears to be corrupt. However, if it's working on your system then that suggests that your table shouldn't be corrupt. However, if we're on the same BIOS revision, then that's very odd. Unless the ACPI tables aren't re-written with a BIOS reflashing; I'm not knowledgable enough about BIOSs to know if that's the case or not off the top of my head.


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