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Subject[PATCH v4 0/4] arm64 SMMUv3 PMU driver with IORT support
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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 smmuv3_pmcg_<phys_addr_page>
where <phys_addr_page> is the physical page address of the SMMU PMCG.
For example, the PMCG at 0xff88840000 is named smmuv3_pmcg_ff88840

Usage example:
For common arch supported events:
perf stat -e smmuv3_pmcg_ff88840/transaction,filter_enable=1,
filter_span=1,filter_stream_id=0x42/ -a netperf

For IMP DEF events:
perf stat -e smmuv3_pmcg_ff88840/event=id/ -a netperf

This is sanity tested on a HiSilicon platform that requires
a quirk to run it properly. As per HiSilicon erratum #162001800,
PMCG event counter registers (SMMU_PMCG_EVCNTRn) on HiSilicon Hip08
platforms are read only and this prevents the software from setting
the initial period on event start. Unfortunately we were a bit late
in the cycle to detect this issue and now require software workaround
for this. Patch #4 is added to this series to provide a workaround
for this issue.

Further testing on supported platforms are very much welcome.

v3 --> v4

-Addressed comments from Jean and Robin.
-Merged dma config callbacks as per Lorenzo's comments(patch #1).
-Added handling of Global(Counter0) filter settings mode(patch #2).
-Added patch #4 to address HiSilicon erratum #162001800
-
v2 --> v3

-Addressed comments from Robin.
-Removed iort helper function to retrieve the PMCG reference smmu.
-PMCG devices are now named using the base address

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):
perf/smmuv3: Add MSI irq support
perf/smmuv3_pmu: Enable HiSilicon Erratum 162001800 quirk

drivers/acpi/arm64/iort.c | 97 ++++-
drivers/perf/Kconfig | 9 +
drivers/perf/Makefile | 1 +
drivers/perf/arm_smmuv3_pmu.c | 959 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1045 insertions(+), 21 deletions(-)
create mode 100644 drivers/perf/arm_smmuv3_pmu.c

--
2.7.4


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