[igt-dev] [PATCH 2/5] i915/gem_mocs_settings: do not set undefined entries to PTE

[Chris Wilson]

Quoting Daniele Ceraolo Spurio (2019-07-26 21:49:28)
> 
> 
> On 7/25/19 1:33 PM, Lucas De Marchi wrote:
> > In the Ice Lake table we are setting all undefined entries to PTE.
> > With Tiger Lake this won't be true anymore. Even if for test in IGT we
> > add a new table for Tiger Lake, in kernel they can be shares since they
> > are supposedly compatible (only unused entries were added or became
> > unused).
> > 
> > Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> 
> And we shouldn't be guaranteeing that unused entries are set to 
> something sensible as part of the ABI.

Better rephrased as undefined values are undefined.
-Chris