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Fwd: Re: [Xen-devel] collecting info on platforms with VT-d BIOS Samsung

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Subject: Fwd: Re: [Xen-devel] collecting info on platforms with VT-d BIOS Samsung X460
From: Joanna Rutkowska <joanna@xxxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 29 Mar 2010 11:54:56 +0200
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-------- 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@xxxxxxxxxxxxxxxxxxxxxx>
To: Pasi Kärkkäinen <pasik@xxxxxx>

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.


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