I will look at this patchset next week. Thanks, Mathieu On Tue, Jun 21, 2022 at 12:50:33AM -0500, Besar Wicaksono wrote: > Add driver support for ARM CoreSight PMU device and event attributes for NVIDIA > implementation. The code is based on ARM Coresight PMU architecture and ACPI ARM > Performance Monitoring Unit table (APMT) specification below: > * ARM Coresight PMU: > https://developer.arm.com/documentation/ihi0091/latest > * APMT: https://developer.arm.com/documentation/den0117/latest > > Notes: > * There is a concern on the naming of the PMU device. > Currently the driver is probing "arm-coresight-pmu" device, however the APMT > spec supports different kinds of CoreSight PMU based implementation. So it is > open for discussion if the name can stay or a "generic" name is required. > Please see the following thread: > http://lists.infradead.org/pipermail/linux-arm-kernel/2022-May/740485.html > > The patchset applies on top of > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > master next-20220524 > > Changes from v2: > * Driver is now probing "arm-system-pmu" device. > * Change default PMU naming to "arm_<APMT node type>_pmu". > * Add implementor ops to generate custom name. > Thanks to suzuki.poulose@xxxxxxx for the review comments. > v2: https://lore.kernel.org/all/20220515163044.50055-1-bwicaksono@xxxxxxxxxx/ > > Changes from v1: > * Remove CPU arch dependency. > * Remove 32-bit read/write helper function and just use read/writel. > * Add .is_visible into event attribute to filter out cycle counter event. > * Update pmiidr matching. > * Remove read-modify-write on PMCR since the driver only writes to PMCR.E. > * Assign default cycle event outside the 32-bit PMEVTYPER range. > * Rework the active event and used counter tracking. > Thanks to robin.murphy@xxxxxxx for the review comments. > v1: https://lore.kernel.org/all/20220509002810.12412-1-bwicaksono@xxxxxxxxxx/ > > Besar Wicaksono (2): > perf: coresight_pmu: Add support for ARM CoreSight PMU driver > perf: coresight_pmu: Add support for NVIDIA SCF and MCF attribute > > arch/arm64/configs/defconfig | 1 + > drivers/perf/Kconfig | 2 + > drivers/perf/Makefile | 1 + > drivers/perf/coresight_pmu/Kconfig | 11 + > drivers/perf/coresight_pmu/Makefile | 7 + > .../perf/coresight_pmu/arm_coresight_pmu.c | 1316 +++++++++++++++++ > .../perf/coresight_pmu/arm_coresight_pmu.h | 177 +++ > .../coresight_pmu/arm_coresight_pmu_nvidia.c | 312 ++++ > .../coresight_pmu/arm_coresight_pmu_nvidia.h | 17 + > 9 files changed, 1844 insertions(+) > create mode 100644 drivers/perf/coresight_pmu/Kconfig > create mode 100644 drivers/perf/coresight_pmu/Makefile > create mode 100644 drivers/perf/coresight_pmu/arm_coresight_pmu.c > create mode 100644 drivers/perf/coresight_pmu/arm_coresight_pmu.h > create mode 100644 drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.c > create mode 100644 drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.h > > > base-commit: 09ce5091ff971cdbfd67ad84dc561ea27f10d67a > -- > 2.17.1 >
