Quoting Michel Thierry (2017-10-05 20:41:40)
> On 10/5/2017 12:10 PM, Chris Wilson wrote:
> > Michel Thierry noticed that we were applying WaDisableCtxRestoreArbitration
> > even to gen9, which does not require the w/a. The rationale is that we
> > need to enable MI arbitration for execlists to work, and to be safe we
> > do that before every batch (in addition to every context switch into the
> > batch). Since this is not clear from the single line comment suggesting
> > the MI_ARB_ENABLE is solely for the w/a, add a little more detail.
> > 
> > Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
> > Cc: Michel Thierry <michel.thie...@intel.com>
> > Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
> > Cc: Michał Winiarski <michal.winiar...@intel.com>
> 
> It can't be clearer. Thanks!
> 
> Reviewed-by: Michel Thierry <michel.thie...@intel.com>

Thanks for asking, and checking what I wrote made sense!
-Chris
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