Flushing dirty L2 cache lines

Hi,

I have seen NV_UFLUSH_L2_FLUSH_DIRTY and MEM_OP_D_OPERATION_L2_FLUSH_DIRTY in NVIDIA Driver.
I have found this in one of the drivers, 390.48. I checked it is available on later versions as well (470, open-source drivers as well).
For example, one of the file that contains this definition is clc06f.h inside kernel/nvidia-uvm folder.

I wonder if these definitions can be utilized to flush dirty lines in GPU L2 cache.
Also if possible, how can I use them in my program?

Thanks in advance,
Ravan.