Quoting Rodrigo Siqueira (2018-06-21 13:16:13)
VKMS currently does not handle dumb data, and as a consequence, it does not provide mechanisms for handling gem. This commit adds the necessary support for gem object/handler and the dumb functions.
I may have been naive, but I didn't think vkms would have need for even the dumb GEM object API as it would be a paired with vgem (or any other GEM driver) and use dmabuf to import backing storage. -Chris