Quoting Chris Wilson (2019-11-10 20:57:51)
> Having been forced to reduce Braswell back to using the aliasing ppgtt,
> the coherency issue we previously observed cannot impact us. Reduce the
> performance penalty imposed on all platforms from using the mfence to a
> mere sfence.
>
> References: cf66b8a0ba14 ("drm/i915/execlists: Apply a full mb before execution for Braswell")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Regards, Joonas
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