On Die, 2011-08-02 at 13:10 +0200, Prof. Dr. Klaus Kusche wrote: > On 2011-08-02 12:28, Rafał Miłecki wrote: > > 2011/8/2 Alan Cox<alan@xxxxxxxxxxxxxxxxxxx>: > >>> But I believe this is a problem of all approaches which provide > >>> multiple hardware-accelerated (or Xv-enabled) seats on a single GPU, > >>> no matter if based on multiple DRM devices, on Xephyr or Xnest > >>> with some kind of OpenGL or DRI passthrough, or on Wayland: > >>> If one has direct access to the graphics engine, he also can access > >>> any video memory he wants. > >> > >> Not always. It's a bit more complicated than that. Some hardware supports > >> write only memory spaces, some hardware supports contexts in the GTT). On > >> other cards you need some kind of security model and verifier to handle > >> this. I don't think reloading the GTT is enough on most of the cards > >> because the display scanout for all the framebuffers is needed all the > >> time. > > > > I believe you respond to Klaus Kusche here? > > > > Klaus: please, CC mailing list so everyone can see your messages. > > My mail Alan cited above was CC'd to the list. > No idea where it got eaten. > Is there some spam filter filtering list postings? There's a moderation queue for posts from addresses that aren't subscribed to the list. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Debian, X and DRI developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
