1 .. SPDX-License-Identifier: GPL-2.0 2 3 ============================================ 4 Ampere SoC Performance Monitoring Unit (PMU) 5 ============================================ 6 7 Ampere SoC PMU is a generic PMU IP that follows Arm CoreSight PMU architecture. 8 Therefore, the driver is implemented as a submodule of arm_cspmu driver. At the 9 first phase it's used for counting MCU events on AmpereOne. 10 11 12 MCU PMU events 13 -------------- 14 15 The PMU driver supports setting filters for "rank", "bank", and "threshold". 16 Note, that the filters are per PMU instance rather than per event. 17 18 19 Example for perf tool use:: 20 21 / # perf list ampere 22 23 ampere_mcu_pmu_0/act_sent/ [Kernel PMU event] 24 <...> 25 ampere_mcu_pmu_1/rd_sent/ [Kernel PMU event] 26 <...> 27 28 / # perf stat -a -e ampere_mcu_pmu_0/act_sent,bank=5,rank=3,threshold=2/,ampere_mcu_pmu_1/rd_sent/ \ 29 sleep 1
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