From: "Roedel, Joerg" <Joerg.Roedel@amd.com>
To: "M. Schneider" <ms@it-infrastrukturen.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: IOMMU support for xen in BIOS of AMD based HP DL385g7 and kernel 3.0.0-rc7
Date: Wed, 20 Jul 2011 14:45:48 +0200 [thread overview]
Message-ID: <20110720124548.GA21948@amd.com> (raw)
In-Reply-To: <4E22BAB9.5050002@it-infrastrukturen.com>
Hi Mark,
On Sun, Jul 17, 2011 at 06:34:33AM -0400, M. Schneider wrote:
> Please allow me one question about IOMMU support in AMDS's 890FX chipset
> and 6176SE CPUs used in HP DL385g7 servers. These chips support IOMMU as
> far as I know. BIOS of HP DL385g7 doesn't currently offer an IOMMU flag.
>
> I have contacted already HP support due to this missing BIOS setting
> options but less or more my request has been ignored (no solution and no
> plans for solving of this important issue yet) so I am looking for a
> workaround as IOMMU support is required for passing thoruhg of PCI
> devices to domU domains (xen 4.0 / 4.1).
I am sorry but if there is no IVRS table there is not much we can do.
The IVRS table contains the information which device uses which
request-ids. Without this information the IOMMU can not work reliably.
Regards,
Joerg
--
AMD Operating System Research Center
Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632
next prev parent reply other threads:[~2011-07-20 12:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-17 10:34 IOMMU support for xen in BIOS of AMD based HP DL385g7 and kernel 3.0.0-rc7 M. Schneider
2011-07-20 12:45 ` Roedel, Joerg [this message]
2011-07-21 15:53 ` M. Schneider
2011-07-25 9:03 ` Roedel, Joerg
2011-07-25 8:44 ` M. Schneider
2011-07-26 11:47 ` Wei Wang2
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