From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Problem: Pattern with vertical colored lines on the dom0 screen Date: Mon, 27 Sep 2010 12:47:06 -0400 Message-ID: <20100927164706.GC4741@dumpdata.com> References: <201009171520.11903.dietmar.hahn@ts.fujitsu.com> <201009241310.19462.dietmar.hahn@ts.fujitsu.com> <201009271406.26670.dietmar.hahn@ts.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <201009271406.26670.dietmar.hahn@ts.fujitsu.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Dietmar Hahn , weidong.han@intel.com, allen.m.kay@intel.com Cc: xen-devel@lists.xensource.com, Jean Guyader List-Id: xen-devel@lists.xenproject.org On Mon, Sep 27, 2010 at 02:06:26PM +0200, Dietmar Hahn wrote: > Hi Jean, > > many thanks for this hint! This saved me a lot of time searching through > the specs. > > Am 24.09.2010 schrieb Jean Guyader: > > The problem we saw with that the bit 10 of the GCC (offset 0x52 on the > > PCH config space) > > wasn't set after the bios. This bit probably enable the shadow GTT > > (created with the GTT + vt-d). > > Yes, the same problem here! > I found the following patch, maybe something similar would help here too? > https://patchwork.kernel.org/patch/132771 There looks to be another in the upstream kernels: check_tylersburg_isoch > > So I have to hit the bios development :-( Well, we should probably provide a quirk check in the Xen code. Copying the Intel folks to see if they any ideas on adding this in the Intel VT-d code paths. Or they might have already a patch ready for this? > > > The vertical stripes means GTT fault. > > > > Jean > > Many thanks! > Dietmar. > > -- > Company details: http://ts.fujitsu.com/imprint.html > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel