NvCtrl over NVML

When will be fully implemented NVCtrl over NVML (without running X server) ?

For example: I need to modify fan speed because embedded thermal management is badly designed and I am unable to start Xorg because Xorg is unsupported in Xen - NV_CTRL_GPU_COOLER_MANUAL_CONTROL+NV_CTRL_THERMAL_COOLER_LEVEL:
https://github.com/NVIDIA/nvidia-settings/blob/master/src/libXNVCtrlAttributes/NvCtrlAttributesNvml.c#L1241-L1247
https://github.com/NVIDIA/nvidia-settings/blob/master/src/libXNVCtrlAttributes/NvCtrlAttributesNvml.c#L1181-L1196