This adds a driver for the SMMUv3 PMU into the perf framework. It includes an IORT update to support PM Counter Groups.
This is based on the initial work done by Neil Leeder[1] SMMUv3 PMCG devices are named as arm_smmu_v3_x_pmcg_y where x denotes the associated smmuv3 dev id(if any) and y denotes the pmu dev id. Usage example: For common arch supported events: perf stat -e arm_smmu_v3_0_pmcg_6/transaction,filter_enable=1, filter_span=1,filter_stream_id=0x42/ -a pwd For IMP DEF events: perf stat -e arm_smmu_v3.0_pmcg.6/event=id/ -a pwd Sanity tested on HiSilicon platform. Further testing on supported platforms are very much welcome. v1 --> v2 - Addressed comments from Robin. - Added an helper to retrieve the associated smmu dev and named PMUs to make the association visible to user. - Added MSI support for overflow irq [1]https://www.spinics.net/lists/arm-kernel/msg598591.html Neil Leeder (2): acpi: arm64: add iort support for PMCG perf: add arm64 smmuv3 pmu driver Shameer Kolothum (2): acpi: arm64: iort helper to find the associated smmu of pmcg node perf/smmuv3: Add MSI irq support drivers/acpi/arm64/iort.c | 179 +++++++-- drivers/perf/Kconfig | 9 + drivers/perf/Makefile | 1 + drivers/perf/arm_smmuv3_pmu.c | 901 ++++++++++++++++++++++++++++++++++++++++++ include/linux/acpi_iort.h | 4 + 5 files changed, 1063 insertions(+), 31 deletions(-) create mode 100644 drivers/perf/arm_smmuv3_pmu.c -- 2.7.4
