Dietpi.com have official support BPI-M2+
what is Dietpi
At its core, DietPi is the goto image for your needs. Whether you are after a maximum performance minimal image, or, you want an optimized BitTorrent server with Ownlcloud running Kodi. DietPi can do it all.
All the DietPi images come pre-optimized with features like automatic filesystem expansion | "DietPi-Ramlog" (/var/log to ram) | Minimal CPU/Memory footprint and low process count to ensure you get the max performance from your device.
image download and more information: