[Intel-gfx] [PATCH 2/5] drm/i915: Flag any possible writes for a GTT fault

[Joonas Lahtinen]

Quoting Chris Wilson (2018-09-03 11:33:34)
> We do not explicitly mark the PTE for the user's GTT mmap as being
> wrprotect, so we don't get a refault when we would need to change a
> read-only mmapping into read-write. As such, we must presume that if the
> vma has PROT_WRITE it may be written to, although this is supposed to be
> indicated by set-domain there are cases (e.g. after swap) where
> userspace may not be aware of the implicit domain change.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas