From mboxrd@z Thu Jan 1 00:00:00 1970 From: listmail Subject: Re: vt-d p7p55d evo Date: Sun, 04 Apr 2010 10:33:42 -0400 Message-ID: <4BB8A346.5020007@triad.rr.com> References: <4BB6B79D.3070305@triad.rr.com> <4BB82E5A.4030400@triad.rr.com> <69A986FE-7EE1-48AD-9829-717094C9A49A@xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <69A986FE-7EE1-48AD-9829-717094C9A49A@xs4all.nl> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Mark Hurenkamp Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Mark Hurenkamp wrote: >> I'm still pretty new to Xen so it could very well be that I've >> misunderstood the requirements for certain capabilities. I thought >> one of the wiki's had stated that to pass through to an hvm guest you >> have to have VT-d though. Is there something specific that I which >> can indicate its status after boot? >> >> bios: 1207 >> cpu: i7 860 >> grub2: http://pastebin.ca/1856369 >> xm dmesg: http://pastebin.ca/1856370 >> xm info: http://pastebin.ca/1856372 >> hvm cfg: http://pastebin.ca/1856376 >> I think I compiled the linux kernel at xen/stable git commit >> 221c4dbf86 given the timestamp in xm info (all done same time frame) > > From your earlier mail, it was not clear wether you were indeed using > hvm, and that xen enabled vt-d properly. > From your xm dmesg, and xm info, it is clear that iommu is indeed > enabled for you, something which i've not been able to achieve with my > board. > Could the CPU make a difference here? I'm on a i5 750, and notice you > are using an i7 860.... > > I'll see if i can do some more experiments with my setup, perhaps > switching back a few changesets to 4.0-rc8. > I'm not sure if the kernel makes a difference, but i'll see if i can > match your configuration as close as possible. > > Thanks for your input! > > > Mark. > according to this chart (and thread) the i5 doesn't support VT-d, http://i683.photobucket.com/albums/vv199/OvrClkr/i5_chart.png link source: http://www.tomshardware.com/forum/274342-28-tomshardware