[igt-dev] [RFC 4/5] igt/i915: Require GTT mapping to be available when needed.

[Chris Wilson]

Quoting Antonio Argenziano (2019-02-23 00:01:27)
> 
> 
> On 21/02/19 11:57, Chris Wilson wrote:
> > Quoting Antonio Argenziano (2019-02-21 19:27:44)
> >> With the GTT aperture becoming unavailable on certain platforms, tests
> >> that target that mapping need to skip if such mapping is not available.
> > 
> > Meh, but necessary.
> > 
> > A few of the coherency correctness checks, like prime, should be
> > extended to check via alternate paths (WC, WB + sync).
> 
> Should we do it in this series or wait to implement new tests later?

It is prerequisite work; if we spot that we think we are entirely losing
coverage of some obscure uapi feature we should fix that up prior to
removing the GTT test. Once it is gone, we are not as likely to remember
to put it back again.
-Chris