RE: [PATCH v2 0/4] arm64 SMMUv3 PMU driver with IORT support

[Shameerali Kolothum Thodi]

Hi Lorenzo/Robin,

Just a  gentle ping on this series. This is a v2 for smmu pmcg support
based on Neil Leeder's v1[1]. 

Main changes include,
-an helper function to IORT to retrieve the associated SMMU info.
-MSI support to the PMU driver.

Please take a look and let me know your thoughts.

Thanks,
Shameer

[1]https://www.spinics.net/lists/arm-kernel/msg598591.html

> -----Original Message-----
> From: Linuxarm [mailto:linuxarm-bounces@xxxxxxxxxx] On Behalf Of
> Shameer Kolothum
> Sent: 24 July 2018 12:45
> To: lorenzo.pieralisi@xxxxxxx; robin.murphy@xxxxxxx
> Cc: mark.rutland@xxxxxxx; vkilari@xxxxxxxxxxxxxx;
> neil.m.leeder@xxxxxxxxx; pabba@xxxxxxxxxxxxxx; will.deacon@xxxxxxx;
> rruigrok@xxxxxxxxxxxxxx; Linuxarm <linuxarm@xxxxxxxxxx>; linux-
> kernel@xxxxxxxxxxxxxxx; linux-acpi@xxxxxxxxxxxxxxx; linux-arm-
> kernel@xxxxxxxxxxxxxxxxxxx
> Subject: [PATCH v2 0/4] arm64 SMMUv3 PMU driver with IORT support
> 
> 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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