On 31 May 2018 at 12:35, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: > From: Jon Bloomfield <jon.bloomfield@xxxxxxxxx> > > We can set a bit inside the ppGTT PTE to indicate a page is read-only; > writes from the GPU will be discarded. We can use this to protect pages > and in particular support read-only userptr mappings (necessary for > importing PROT_READ vma). > > Signed-off-by: Jon Bloomfield <jon.bloomfield@xxxxxxxxx> > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> > Cc: Matthew Auld <matthew.william.auld@xxxxxxxxx> > Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> fwiw I didn't see any surprises with ro 2M/64K PTEs when testing locally. For the series: Reviewed-by: Matthew Auld <matthew.william.auld@xxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
