drm/i915/cmdparser: Accelerate copies from WC memory
If we need to use clflush to prepare our batch for reads from memory, we can bypass the cache instead by using non-temporal copies. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NMatthew Auld <matthew.william.auld@gmail.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-39-chris@chris-wilson.co.uk
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