[Intel-gfx] [PATCH 7/8] drm/i915: Create vgpu specific write MMIO to reduce traps

[Chris Wilson]

On Sat, Sep 20, 2014 at 02:47:07AM +0800, Jike Song wrote:
> From: Yu Zhang <yu.c.zhang at intel.com>
> 
> In the virtualized environment, forcewake operations are not
> necessory for the driver, because mmio accesses will be trapped
> and emulated by the host side, and real forcewake operations are
> also done in the host. New mmio write handlers are added to directly
> call the __raw_i915_write, therefore will reduce many traps and
> increase the overall performance for drivers runing in the VM
> with Intel GVT-g enhancement

Explain why this is not done inside uncore_init.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre