On Mon, 28 Nov 2011 22:24:54 +0100, Daniel Vetter <daniel.vet...@ffwll.ch> wrote: > And track the existence of such a binding similar to the aliasing > ppgtt case. Speeds up binding/unbinding in the common case where we > only need a ppgtt binding (which is accessed in a cpu coherent fashion > by the gpu) and no gloabl gtt binding (which needs uc writes for the > ptes).
For one month from mid-june to mid-july, Mesa master was setting I915_GEM_DOMAIN_GTT in the workaround pipe control. That was changed to be _INSTRUCTION, because _GTT caused kernel oopses, and query objects had already been doing _INSTRUCTION since forever. There are no uses of MI_STOREs in the driver. I'd say the minor ABI change potential in here is safe.
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