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Re: [Xen-devel] Xen patches merged to upstream Linux 2.6.36, plans for 2

To: "Mr. Teo En Ming (Zhang Enming) of Singapore" <space.time.universe@xxxxxxxxx>
Subject: Re: [Xen-devel] Xen patches merged to upstream Linux 2.6.36, plans for 2.6.37?
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 16 Aug 2010 19:55:48 +0300
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, zhang_enming@xxxxxxxxxxx, "teoenming@xxxxxxxxxxx" <teoenming@xxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
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On Tue, Aug 17, 2010 at 12:44:44AM +0800, Mr. Teo En Ming (Zhang Enming) of 
Singapore wrote:
>    Dear Pasi,
>    I have just finished downloading the latest Xen 4.0.1-rc6 hypervisor and
>    also the latest paravirt-ops dom0 Linux kernel, at the time of
>    this writing.
>    I understand that, by default, Xen 4.0.x hypervisor series support VGA
>    passthrough of the primary graphics adapter, especially Intel Integrated
>    Graphics Device (IGD) if you are using an Intel Desktop Board like me
>    (Intel DQ45CB). Hence no additional work/patches are required if you just
>    want to passthrough the IGD or primary VGA adapter. But VGA passthrough of
>    the secondary graphics adapter, ie. my NVIDIA GeForce 8400 GS PCI Express
>    x16 display adapter, is not supported by default. To passthrough the
>    secondary graphics adapter to your Windows XP, Windows Vista or Windows 7
>    HVM fully virtualized virtual machine, patches are required to load the
>    VGA BIOS of the secondary graphics adapter from a file named
>    vgabios-pt.bin and also to perform 1:1 vBAR:pBAR mappings.
>    I have just finished reading through the following Xen wiki pages:
>    [1]http://wiki.xensource.com/xenwiki/XenParavirtOps
>    [2]http://wiki.xensource.com/xenwiki/XenVGAPassthrough
>    [3]http://lists.xensource.com/archives/html/xen-devel/2009-08/msg01176.html
>    [4]http://lists.xensource.com/archives/html/xen-devel/2010-05/msg00441.html
>    I am wondering if I can apply the four patches attached in this xen-devel
>    mailing list topic
>    [5]http://lists.xensource.com/archives/html/xen-devel/2009-08/msg01176.html
>    to Xen 4.0.1-rc6?
>    I have already used those same set of patches from Han Weidong of Intel
>    Corporation between July and November last year (2009) to patch
>    xen-unstable 3.5 for my NVIDIA GeForce 8400 GS PCI Express x16 VGA
>    adapter. The thing that is troubling me is whether I can used the same set
>    of patches to patch Xen 4.0.1-rc6, since the patches are already outdated.
>    The patches which had been provided by Han Weidong to me were dated 31st
>    August 2009, almost one year ago.
>    I am asking if the patches provided here at
>    [6]http://lists.xensource.com/archives/html/xen-devel/2009-08/msg01176.html
>    are ***COMPATIBLE*** with Xen 4.0.1-rc6 at all? Would the patches cause
>    errors to be displayed/generated when applied to Xen 4.0.1-rc6?
>    I am looking forward to your reply.

I haven't tried those patches.. so you just have to try and see how it goes!

-- Pasi

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