I guess that's your problem, your cpu doesn't seem to support VT-D, see
Both CPU, chipset and bios most support it ...
Sunday, April 4, 2010, 1:28:34 PM, you wrote:
>> I'm still pretty new to Xen so it could very well be that I've
>> misunderstood the requirements for certain capabilities. I thought
>> one of the wiki's had stated that to pass through to an hvm guest
>> you have to have VT-d though. Is there something specific that I
>> which can indicate its status after boot?
>> bios: 1207
>> cpu: i7 860
>> grub2: http://pastebin.ca/1856369
>> xm dmesg: http://pastebin.ca/1856370
>> xm info: http://pastebin.ca/1856372
>> hvm cfg: http://pastebin.ca/1856376
>> I think I compiled the linux kernel at xen/stable git commit
>> 221c4dbf86 given the timestamp in xm info (all done same time frame)
> From your earlier mail, it was not clear wether you were indeed using
> hvm, and that xen enabled vt-d properly.
> From your xm dmesg, and xm info, it is clear that iommu is indeed
> enabled for you, something which i've not been able to achieve with my
> Could the CPU make a difference here? I'm on a i5 750, and notice you
> are using an i7 860....
> I'll see if i can do some more experiments with my setup, perhaps
> switching back a few changesets to 4.0-rc8.
> I'm not sure if the kernel makes a difference, but i'll see if i can
> match your configuration as close as possible.
> Thanks for your input!
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