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Date: Thu, 9 Apr 2015 10:38:39 +0200
From: =?windows-1252?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
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To: Konstantin Belousov <kostikbel@gmail.com>, Gustau P?rez
 <gperez@entel.upc.edu>
Subject: Re: No IOMMU/DMAR with DELL 3020
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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Hello,

El 09/04/15 a les 10.35, Konstantin Belousov ha escrit:
> 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.

Check also if there's any BIOS update from the manufacturer.

Roger.