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SubjectRe: [PATCH 0/2] arm64 SMMUv3 PMU driver with IORT support
Hi Neil,

On Fri, Aug 04, 2017 at 03:59:12PM -0400, Neil Leeder wrote:
> This adds a driver for the SMMUv3 PMU into the perf framework.
> It includes an IORT update to support PM Counter Groups.
>
> IORT has no mechanism for determining device names so PMUs
> are named based on their physical address.
>
> Tested on Qualcomm QDF2400. perf_fuzzer ran for 4+ hours
> with no failures.
>
> Neil Leeder (2):
> acpi: arm64: add iort support for PMCG
> perf: add arm64 smmuv3 pmu driver
>
> drivers/acpi/arm64/iort.c | 54 +++
> drivers/perf/Kconfig | 9 +
> drivers/perf/Makefile | 1 +
> drivers/perf/arm_smmuv3_pmu.c | 823 ++++++++++++++++++++++++++++++++++++++++++
> include/acpi/actbl2.h | 9 +-
> 5 files changed, 895 insertions(+), 1 deletion(-)
> create mode 100644 drivers/perf/arm_smmuv3_pmu.c

I try to run your driver on ThunderX2, but perf list doesn't show new
events, and example in description in patch 2 also doesn't work:
yury@VAL1-25:~/linux$ tools/perf/perf stat -e smmu_0_ff88840/transaction,filter_enable=1, filter_span=1,filter_stream_id=0x42/ -a pwd
event syntax error: '..ter_enable=1,'
\___ parser error
Run 'perf list' for a list of valid events

Usage: perf stat [<options>] [<command>]

-e, --event <event> event selector. use 'perf list' to list available events

I run v4.14-rc7 kernel plus this series. The config is attached. I
found that platform_match() never return 1 for arm-smmu-pmu and so
the driver never probed.

Maybe it's my local configuration issue?

Thanks for any help,
Yury
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