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Date: Thu, 9 Apr 2015 11:52:33 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: Konstantin Belousov <kostikbel@gmail.com>
Subject: Re: No IOMMU/DMAR with DELL 3020
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References: <552635A5.5070707@entel.upc.edu>
 <20150409082128.GF2390@kib.kiev.ua>
 <5526381A.3010909@entel.upc.edu>
 <20150409083512.GG2390@kib.kiev.ua>
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Cc: Gustau P?rez <gperez@entel.upc.edu>, freebsd-current@freebsd.org
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On Thu, Apr 09, 2015 at 11:35:12AM +0300, Konstantin Belousov wrote:

> On Thu, Apr 09, 2015 at 10:28:10AM +0200, Gustau P?rez wrote:
> >    Yup, sorry for the error. I checked the micro in the ark and it has vt-d:
> > 
> >               http://goo.gl/CZZRHz
> It only indicates that the CPU/northbridge has the hardware, but BIOS must
> do a work to configure it and to inform the OS about the configuration.
> Your BIOS did not.
>  
> > 
> >    in the bios, there's only one option to enable virtualization
> > support, which is ticked.
> > 
> >    The complete log is here:
> > 
> >              http://dpaste.com/28FDMJQ
> > 
> Dmesg would not give you any useful information there. A DMAR table
> is either present, or is it not. In the later case, OS cannot use the
> hardware, and if no option in BIOS is present, your only choice is to
> complain to the machine/BIOS vendor.

May be some OS utilites can do same work?
This is theoretically capable?