Hi guys, so pushed the first few patches from this series. I hope that I correctly managed to resolve the silent Xe merge conflict in drm-tip, but would be nice if somebody could double check. Then for the two remaining patches I've implemented most of what Thomas suggest, e.g. the existing functionality sticks around for eviction and hobs, but ttm_bo_validate will now try to always move things into the non-fallback placements on validation first. What I haven't done yet is to split up the preferred placement since I couldn't immediately see an use case for this, but it's really something we might do in the future as well. Please review and comment, Christian.
