4.9 Performance monitoring events

Each HN-F can monitor all the PMU events.

However, only four of the HN-F PMU events can be tracked through each HN-F at any given time. Software must set up the pmu_event_sel register as required to select which four events HN-F must report for the PMU count logic.

All Secure HN-F events are gated with the SPNIDEN input signal to the HN-F. The SoC drives SPNIDEN to the CCN-502 to either count or not count Secure PMU events. The SoC must set SPNIDEN HIGH to count Secure PMU events.

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