Re: [PATCH] drm/i915/gtt: add some flushing for the 64K GTT path

2021-09-03 Thread Mika Kuoppala
Matthew Auld writes: > If we need to mark the PDE as operating in 64K GTT mode, we should be > paranoid and flush the extra writes, like we already do for the PTEs. On > some platforms the clflush can apparently add the just the right amount > of magical delay to force the GPU to see the updated

[PATCH] drm/i915/gtt: add some flushing for the 64K GTT path

2021-09-03 Thread Matthew Auld
If we need to mark the PDE as operating in 64K GTT mode, we should be paranoid and flush the extra writes, like we already do for the PTEs. On some platforms the clflush can apparently add the just the right amount of magical delay to force the GPU to see the updated entry. Signed-off-by: Matthew