On Fri, 23 Sep 2011 23:45:54 -0700, Kenneth Graunke <kenn...@whitecape.org> wrote: > I mistakenly set GEN7_PS_MAX_THREAD_SHIFT to 23; it's actually 24 on > Ivybridge. Not only did this halve our thread count, it caused us to > write 1 into a bit 23, which is marked as MBZ (must be zero). > Furthermore, it made us write an even number into this field, which is > apparently not allowed. Apparently we were just lucky it worked. > > NOTE: This is a candidate for the 7.11 branch.
You weren't mistaken -- the docs said 23 at one point. The updated 24 looks correct, though. Reviewed-by: Eric Anholt <e...@anholt.net>
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