--- /dev/null
+### etnaviv_noop backend
+
+This implements the minimum of etnaviv in order to make shader-db work.
+The submit ioctl is stubbed out to not execute anything.
+
+Export `MESA_LOADER_DRIVER_OVERRIDE=etnaviv
+LD_PRELOAD=$prefix/lib/libetnaviv_noop_drm_shim.so`.
+
+It is possible to select a specific GPU model by setting the ETNA_SHIM_GPU
+environment variable.
+
+The following GPU models are available:
+- GC2000 (default)
+- GC3000
+- GC7000L