This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] Need some clarifications regarding VT-d requirements for

To: Sandi Romih <the.romihs@xxxxxxxxx>
Subject: Re: [Xen-users] Need some clarifications regarding VT-d requirements for PCI passthrough in Xen 4.1
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Wed, 27 Jul 2011 00:45:13 +0300
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Tue, 26 Jul 2011 14:46:26 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <CAJvYa40vZTyteAyXN7rtQGbBez6-EquOzSRzuSib=DWPsTR-8w@xxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <CAJvYa40vZTyteAyXN7rtQGbBez6-EquOzSRzuSib=DWPsTR-8w@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.18 (2008-05-17)
On Tue, Jul 26, 2011 at 02:29:51PM +0200, Sandi Romih wrote:
>    Hello,
>    I am looking into building a workstation using Xen to host several
>    operating systems.
>    Looking at the pci passthrough requirements of Xen4.1 on the [1]VTdHowTo
>    page, I am a little puzzled with the fact that only Intel Core2Duo (with
>    VT-x), Core2Quad, i7 and Core i5 (vPro Brand) CPU's are supported while
>    motherboards with the i55x0 chipset are supported (for example
>    the Supermicro server mainboard: [2]X8DT3-F).
>    The irony in all this it that above this list of supported CPU's and
>    motherboards is the statement "Note that in addition to the motherboard
>    chipset and BIOS also your CPU must have support for IOMMU IO
>    virtualization (VT-d)!".
>    It is ironic because the i55x0 chipset only supports Intel 5500 and 5600
>    Xeon CPU's, which according to Intel, do NOT have VT-d support integrated.
>    To my knowledge, Core i7 CPU's can not be used (in a dual configuration)
>    with i55x0 chipsets. In fact, if one looks at the specs of these 55x0
>    motherboards, one will only find support for 5500 and 5600 CPU's.
>    Is it possible that the i55x0 series of chipsets is listed here because it
>    was used with a single i7 CPU?
>    I currently have the EVGA SR-2 motherboard (which is a dual Xeon 5500/5600
>    board with the i5520 chipset) on which I would like to build this multi OS
>    workstation.
>    So I would be very grateful if someone could confirm whether Xeon 5600
>    CPU's and 5520 chipsets will work with pci passthrough in Xen4.1.
>    Regards

afaik VT-d IOMMU is more of a chipset feature than CPU feature.. 
also VTdHowTo might be out-of-date. Feel free to update.

Anyway, I have some servers with VT-d IOMMU available with Xeon 5600 series 

-- Pasi

Xen-users mailing list

<Prev in Thread] Current Thread [Next in Thread>