[Intel-gfx] [PATCH 4/4] drm/i915: Use indirect ctx bb to mend CMD_BUF_CCTL

[Chris Wilson]

Quoting Mika Kuoppala (2020-04-24 17:01:50)
> Use indirect ctx bb to load cmd buffer control value
> from context image to avoid corruption.
> 
> v2: add to lrc layout (Chris)
> v3: end to a cacheline (Chris)
> v4: add to lrc fixed (Chris)
> 
> Testcase: igt/i915_selftest/gt_lrc
> Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

Acked-by: Chris Wilson <chris at chris-wilson.co.uk>

If only we had some more fuzz validation tests.
-Chris