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@arm.com for the review comments.
> v2: https://lore.kernel.org/all/20220515163044.50055-1-bwicaksono@nvidia.com/
>
> 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@arm.com for the review comments.
> v1: https://lore.kernel.org/all/20220509002810.12412-1-bwicaksono@nvidia.com/
>
> 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
>