From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: Qxl problem with xen domU,
 is xen spice and/or qemu bugs?
Date: Tue, 24 Sep 2013 13:50:04 +0200
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To: Fabio Fantoni <fabio.fantoni@m2r.biz>
Cc: xen-devel <xen-devel@lists.xensource.com>, Ian Campbell <ian.campbell@citrix.com>, Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>, George Dunlap <George.Dunlap@eu.citrix.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Jan Beulich <JBeulich@suse.com>, Anthony PERARD <anthony.perard@citrix.com>, spice-devel@lists.freedesktop.org
List-Id: xen-devel@lists.xenproject.org

  Hi,

> Someone can help me to find the problem that makes qxl unusable please?

#1 git cherry-pick c58c7b959b93b864a27fd6b3646ee1465ab8832b

#2 When using f19 try without X11 first.  You should have a working
   framebuffer console on qxldrmfb before trying to get X11 going.

#3 qxl has a bunch of tracepoints.  Enable them, then compare xen
   results with kvm/tcg results to see where things start going wrong.

#4 qxl needs a permanent mapping of the two pci memory bars as the
   (host virtual) memory location of these bars is passed to the
   spice-server library.  That might need some special care on xen
   due to the mapcache.  Disclamer: It's been a few years I looked
   closer at this, so things in the xen world might have changed
   meanwhile ...

HTH,
  Gerd