[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xci pci passthru video card flr etc
On Tue, Aug 18, 2009 at 9:13 AM, Han, Weidong<weidong.han@xxxxxxxxx> wrote: > Andrew Lyon wrote: >> Hi, >> >> I want to try using pci passthru to give a windows 7 hvm access to a >> dedicated video card, I've read all of the threads I can find about >> video passthru but I still have some questions: >> >> I use rebased opensuse Xen patches to make the dom0 kernel, currently >> running 2.6.29 as there are networking problems with gplpv and 2.6.30, >> I believe it is necessary to use Function Level Reset to reset the >> graphics card before the hvm domU boots, otherwise it will be >> incorrectly initialized by the bios or dom0 ? and therefore will not >> function correctly, I plan to rebase the following patches to >> 2.6.29/30 to enable FLR: >> >> http://xenbits.xen.org/gitweb?p=xenclient/linux-2.6.27-pq.git;a=commit;h=50c08c0d3e499c5576e906ab5f0c9c234fba2493 >> http://xenbits.xen.org/gitweb?p=xenclient/linux-2.6.27-pq.git;a=commit;h=b631b9005cd72b0e2e859dd1fab557a3015c8b58 >> http://xenbits.xen.org/gitweb?p=xenclient/linux-2.6.27-pq.git;a=commit;h=36083d0755a740ed509ca9812db9576473bc4e8b >> >> Are all 3 patches required? are any other patches required? what about >> patches to Xen? >> >> The http://xenbits.xen.org/gitweb?p=xenclient/linux-2.6.27-pq.git >> patchqueue includes pull's from other trees, is there anything in them >> that I need for FLR or other necessary new features? >> >> I am currently running Xen 3.4 but plan to upgrade to the latest >> 3.4.1-rc before I try video passthru, I've already patched 3.4 to fix >> the problem with viridian and windows 7, I assume that fix will be >> included in 3.4.1 as it is in testing >> (http://lists.xensource.com/archives/html/xen-changelog/2009-06/msg00119.html) >> >> My system currently has a 512mb 8600GT which I use with the nvidia >> binary drivers driving a pair of 1920x1200 tft's, I think I can get >> access to another identical 8600GT so I plan to drive one monitor with >> each card, has anybody had success with passthru using nvidia cards? > > We observed that it needs vBAR = pBAR (1:1 map memories of video card in > guest and host) for some Nvidia cards, such as Geforce 8400 GS. But some > high-end Nvidia cards (e.g Quadro FX 3800) don't require that, they are more > virtualization friendly. > > Regards, > Weidong > > I thought the purpose of the vt-d iommu was to map the virtual addresses to physical for just this reason? I don't think I can run to £700 needed for a quadro just so that I can run windows 7 aero on my 3rd monitor :-), has anybody else had success with consumer nvidia cards? I will get a ati card if necessary but I prefer to give my ££'s to nvidia as they have historically provided better linux support. Andy _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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