Updates of HiSilicon Uncore L3C PMU --- Support new version of L3C PMU, which supports extended events space which can be controlled in up to 2 extra address spaces with separate overflow interrupts. The layout of the control/event registers are kept the same. The extended events with original ones together cover the monitoring job of all transactions on L3C. That's said, the driver supports finer granual statistics of L3 cache with separated and dedicated PMUs, and a new operand `ext` to give a hint of to which part should perf counting command be delivered. The extended events is specified with `ext=[1|2]` option for the driver to distinguish: perf stat -e hisi_sccl0_l3c0_0/event=<event_id>,ext=<ext>/ Currently only event option using config bit [7, 0]. There's still plenty unused space. Make ext using config [16, 17] and reserve bit [15, 8] for event option for future extension. With the capability of extra counters, number of counters for HiSilicon uncore PMU could reach up to 24, the usedmap is extended accordingly. The hw_perf_event::event_base is initialized to the base MMIO address of the event and will be used for later control, overflow handling and counts readout. We still make use of the Uncore PMU framework for handling the events and interrupt migration on CPU hotplug. The framework's cpuhp callback will handle the event migration and interrupt migration of orginial event, if PMU supports extended events then the interrupt of extended events is migrated to the same CPU choosed by the framework. A new HID of HISI0215 is used for this version of L3C PMU. Some necessary refactor is included, allowing the framework to cope with the new version of driver. Yicong Yang (1): drivers/perf: hisi: Add support for L3C PMU v3 Yushan Wang (2): Documentation: hisi-pmu: Fix of minor format error Documentation: hisi-pmu: Add introduction to HiSilicon Documentation/admin-guide/perf/hisi-pmu.rst | 44 ++- drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c | 342 ++++++++++--------- drivers/perf/hisilicon/hisi_uncore_pmu.h | 2 +- 3 files changed, 214 insertions(+), 174 deletions(-) -- 2.33.0