From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brian Lavender Subject: Re: ASUS p5q-em board and VT-d Date: Wed, 6 Oct 2010 09:29:35 -0700 Message-ID: <20101006162935.GA29501@brie.com> References: <20101006024327.GV2740@brie.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20101006024327.GV2740@brie.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: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org I emailed ASUS about this feature and this was the response I got. Can you update the BIOS for the P5Q-EM to initialize Graphics Translation Tables? According to the manual, it does not currently initialize these tables. I was looking to buy this board to use the VT-D features and it seems that you have not initialized full support for it. brian Response from ASUS Hello Sir/Madam The reason it is not supported is because at this time the BIOS and chipset cannot handle that feature. I will send a request to the engineering department but I cannot promise they will design a BIOS to support this feature on this board. On Tue, Oct 05, 2010 at 07:43:27PM -0700, Brian Lavender wrote: > Anyone get the ASUS p5q-em b boar to support VT-d? It looks like it > is lacking the capability for the bios to zero out pages for the Graphics > Translation Table (GTT). See this thread. > > http://lists.xensource.com/archives/html/xen-devel/2009-04/msg00670.html > > And, I also looked at the manual for the board and it appears that the > option to specify memory for the GTT is not available. This is what it > says in the manual, but I am not sure if this has been changed. > > GTT Graphics Memory Size [No VT mode, 2MB] > This item is not available. > > I guess I am confused why the BIOS needs to access the memory for the GTT. It > seems that this ought to be similar to setting pages for the MMU, but I don't > know the whole story to this. > > Two questions I have. Does the BIOS need to configure this? Has Asus fixed this, > or is this board non-functional with VT-d? I see they have a more recent bios > update than the thread where Sandeer tried the board. > > http://support.asus.com/download/download.aspx?SLanguage=en-us&product=1&model=P5Q-EM&type=map&f_type=3 > > brian > -- > Brian Lavender > http://www.brie.com/brian/ > > "Program testing can be used to show the presence of bugs, but never to > show their absence!" > > Professor Edsger Dijkstra > 1972 Turing award recipient > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel -- Brian Lavender http://www.brie.com/brian/ "Program testing can be used to show the presence of bugs, but never to show their absence!" Professor Edsger Dijkstra 1972 Turing award recipient