Re: [Xen-devel] Discussion on whether to continue with the patches for Xen 4.5 Re: [v6][PATCH 2/2] xen:vtd: missing RMRR mapping while share EPT

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Sep 29, 2014 at 01:26:52AM +0000, Zhang, Yang Z wrote:
> 
> > but I could be very well mistaken - please correct me) would have to
> > answer/fix all the patches in the next two working days.
> > 
> > With the first RC going out on October 15th, that means a total of four
> > working days to get all of this done, reviewed, fixed, and tested.
> > 
> > And working under stress to get this done can mean introducing
> > subtle bugs (this is based on my personal experience, so your
> > experience might be different).
> > 
> > Anyhow, I really need to know if - are all of the code pieces
> > (minus the patches we are discussing) for this full GPU
> > functionality in the Xen codebase and will it work with Xen 4.5
> > or will it require extra additional patches? And also, can
> 
> Qemu-traditional + Xen 4.5 + RMRR patchset will work.
> 

Speaking of qemu-traditional.. can you please check this (unapplied) patch:

"[PATCH 3/3] qemu-xen-trad: IGD passthrough: Expose vendor specific pci cap on 
host bridge.":
http://lists.xenproject.org/archives/html/xen-devel/2013-02/msg00538.html

And some discussion/comments about it:
http://lists.xen.org/archives/html/xen-devel/2013-07/msg01385.html

That patch has been floating around for over 1,5 years, so it would be nice to 
get it cleaned up and applied finally..
based on the description it sounds like it's necessary to fix windows BSOD on 
certain Intel IGD hardware / drivers.


-- Pasi


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