Failed to access PMCCNTR_EL0 on RK3399 Board

https://github.com/jerinjacobk/armv8_pmu_cycle_counter_el0

I got that  application in user-space can not access "PMCCNTR_EL0" commonly. So, I cross-compiled kernel-space code in github project above and insmod gennerated ko file on my rk3399 board.

However, I still could not access PMCCNTR_EL0 regsiter after that. I wonder that how could I fix it?

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