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Re: [Xen-devel] collecting info on platforms with VT-d BIOS problems / S

To: "Kay, Allen M" <allen.m.kay@xxxxxxxxx>
Subject: Re: [Xen-devel] collecting info on platforms with VT-d BIOS problems / Supermicro X7SB4
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 29 Mar 2010 10:20:57 +0300
Cc: "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Han, Weidong" <weidong.han@xxxxxxxxx>
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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 
See this thread for more information: 

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: 

-- Pasi

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