From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Beng Heng, Ng" Subject: Re: Experimental results for VGA passthrough Date: Sat, 06 Jun 2009 18:40:46 -0400 Message-ID: <4A2AF06E.4080800@eecs.umich.edu> References: <4A27FFB0.6060108@eecs.umich.edu> <4A28120F.5060707@eecs.umich.edu> <4A2820D0.3010301@eecs.umich.edu> <4A287525.1080103@eecs.umich.edu> <4A29A384.3060004@eecs.umich.edu> <4A29A3E7.3090509@eecs.umich.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Jean Guyader Cc: xen-devel List-Id: xen-devel@lists.xenproject.org Hi, With the patch applied, I did a FLR on the card as follows: echo -n "0000:00:02.0" > /sys/bus/pci/drivers/pciback/do_flr The screen turned blank upon issuing the command. I was able to boot up DomU. Shutting down DomU returns the screen to blank. Is this the expected observation? Thanks. - Beng Heng Jean Guyader wrote: > We have a patch to the FLR support to pciback. > http://xenbits.xen.org/gitweb?p=xenclient/linux-2.6.27-pq.git;a=blob_plain;f=master/pciback-flr;hb=HEAD > > Jean > > 2009/6/6 Beng Heng, Ng : >> Apologies, I missed your earlier point about the FLR. I'll try that out. >> Thanks. >> >> - Beng Heng >> >> Beng Heng, Ng wrote: >>> Hi Jean, >>> >>> For the linux guest, I tested using Ubuntu 64-bit. It doesn't seem to >>> work well, and hangs shortly after boot-up. I've attached a short clip >>> and hopefully that can explain my observations better. I've also >>> attached logs from the serial terminal and Qemu. I'd like to bring your >>> attention to the last lines of the Qemu log, which warns that the guest >>> is trying to write to unused BAR. >>> >>> On the other hand, things are much smoother with Vista 64-bit. I have >>> tried no less than three times, and all went smoothly. Even the >>> resolution, color and Aero feature are equivalent to native. The only >>> minor issue is that after shutdown, the screen becomes blank. But I >>> suppose this is better than XP which was "stuck" in the shutdown screen. >>> I have the logs and clip for Vista as well. As the clip is bigger, I'll >>> only send it to you if you want. >>> >>> Please let me know if there's any comments or suggestions which you'd >>> like me to try out. Thanks and have a great weekend. >>> >>> Warmest Regards, >>> Beng Heng >>> >>> Jean Guyader wrote: >>>> Could you tell me if it works with a Vista guest or a linux hvm guest? >>>> >>>> The page fault and the screen still stays on Windows issue are due to >>>> the lack of FLR in your kernel. Doing a FLR on the graphic card before >>>> booting and when the domain shutdown will fix those. >>>> >>>> Thanks, >>>> Jean >>>> >> > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel