[PATCH v2 7/8] drm/xen-front: Implement GEM operations and backend communication

From: Oleksandr Andrushchenko Implement GEM handling depending on driver mode of operation: depending on the requirements for the para-virtualized environment, namely requirements dictated by the accompanying DRM/(v)GPU drivers running in both host and guest

[PATCH v2 7/8] drm/xen-front: Implement GEM operations and backend communication

From: Oleksandr Andrushchenko Implement GEM handling depending on driver mode of operation: depending on the requirements for the para-virtualized environment, namely requirements dictated by the accompanying DRM/(v)GPU drivers running in both host and guest environments, number of operating