I could generate a Boot loader in QSPI and load my FPGA in the QSPI mode.
However I realize my xczu9eg-ffvc900-1-e consumes 600mA more on 3V3 compare to a simple load via hardware management in vivado.
Is there a way to shut down paert of the PS part (A53, blocks...) after I PL fabric is loaded since I just need the PL par of this FPGA
If you have the PMUFW loaded you could power off the full power domain but calling this function (maybe from the FSBL after all your loading is done).
You do need to do some Initialization of the PM before this.
Maybe take a look at xilpm_selfsuspend_example.c as reference.