Hi experts,

I do an experiment about cpu power with a board which has 4 cores of Cortex-A55.

I try to power on/power off core1~3 parallelly.

Sometimes Both PACCEPT and PDENY are zero after changes the power state.

If I only power on/power off one core,…

Is there a way to update the PC register in the aarch64 mode?

When we are at aarch32, we can access PC register directly. But in aarch64 mode, there is no handle to PC register.