Re: [Xen-users] Some iommu questions(mostly about intel's vt-d)

[Mihail Ivanov <mihail.ivanov93@xxxxxxxxx>]

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I've checked out all the info on http://hcl.xensource.com/
Only one Lenovo Workstation is there(on socket 1150 that is) - the
TS440, yet I couldn't find info on it's motherboard, only a picture -
from which I see only two PCI_E slots - kinda fail for my purposes
anyway. It's expensive as well(I don't even like it's case and the PSU
is only 450W).

The MBD-X10SAE-O should do fine, I don't know why another poster said
he couldn't get the IGP to work, but I think it should be a solvable
issue as Intel drivers are good.

As for the MBD-X10SAT-O - it's a bit strange, they say ECC ram in the
specs, but in the manual everywhere they say - Non-ECC. I guess it's
true that even server motherboards have their problems.

Still I'm probably getting the  MBD-X10SAE-O as it's available over
here for a good price, and I've found many people say ECC works and
VT-d too.

About the Video outputs - It's not much of a problem, perhaps I will
get some Eyefinity cards with many display ports. Also about cutting
the PCI_E slots - I just think I will use cheap risers if I have to,
but it seems to me they don't need cutting. Also there are a lot of
single slot cheap VGA's around me for even 10-25 $(used ones
obviously) and I the outputs being different matters not to me.

http://www.wiredzone.com/mmenglish/Images/10022747-1.jpg

The positiong could be better and those 2 PCI slots are kinda useless,
but perhaps I will plug a sound card(if I decide the sound is bad) and
a USB 2.0 controller in there.

Also what does:
"(XEN)  Intel VT-d Dom0 DMA Pass-through not enabled." means?

Shouldn't that mean that one cannot do PCI pass-through?
So how can IOMMU be enabled without that?
Isn't that a vital part of it?
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