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Subject[PATCH v2 0/4] arm64 SMMUv3 PMU driver with IORT support
Date
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


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