From: Joanna Rutkowska <joanna@invisiblethingslab.com>
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Fwd: Re: collecting info on platforms with VT-d BIOS Samsung X460
Date: Mon, 29 Mar 2010 11:54:56 +0200 [thread overview]
Message-ID: <4BB078F0.9090107@invisiblethingslab.com> (raw)
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Forgot to reply to the list.
-------- Original Message --------
Subject: Re: [Xen-devel] collecting info on platforms with VT-d BIOS
Samsung X460
Date: Mon, 29 Mar 2010 11:52:45 +0200
From: Joanna Rutkowska <joanna@invisiblethingslab.com>
To: Pasi Kärkkäinen <pasik@iki.fi>
On 03/29/2010 09:20 AM, Pasi Kärkkäinen wrote:
> On Fri, Jan 22, 2010 at 04:22:08PM -0800, Kay, Allen M wrote:
>> We would like to collect information on platforms that have problem with VT-d PCI device passthrough using non-IGD PCI devices. Note that IGD (integrated display device) device passthrough code is still being worked on.
>>
>> If you have encountered VT-d problems on a particular platform using latest xen-unstable, please provide the following information so that we can work with OEM's to get their BIOS's fixed:
>>
>> (a) Platform details (OEM, Product/Model#, Other identifying info)
>> (b) BIOS version/number
>> (c) Version of Xen with which failure is seen (if not the latest xen-unstable)
>> (d) Specific error/failure details such as serial log
>>
>> Thanks!
>>
>
> I have a Supermicro motherboard with broken BIOS regarding VT-d ACPI DMAR tables.
> See this thread for more information: http://lists.xensource.com/archives/html/xen-devel/2010-03/msg01477.html
>
> Model: Supermicro X7SB4
> BIOS: Version 1.2a (latest available)
> Xen: 4.0.0-rc8 (latest xen-unstable)
> Errors: (XEN) [VT-D]dmar.c:371: Invalid ACPI DMAR entry length: 0x0
>
> More information about the error here: http://lists.xensource.com/archives/html/xen-devel/2010-03/msg01476.html
>
I can also add Samsung X460 laptop to this list. It is based on PM45
chipset (which does have VT-d), but the broken X460 BIOS doesn't expose
DMAR table, so no VT-d on this machine.
joanna.
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