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. -- Rafał _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
