[RFC PATCH v9 0/7] Cavium ARM64 uncore PMU support

Jan Glauber
2017-08-29T13:13:07Z

I'm posting this as RFC following this discussion:
https://marc.info/?l=linux-arm-kernel&m=150099526923838&w=2

I've implemented the wrapper for the PCI devices and put it under
drivers/soc/cavium which I found more appropriate than drivers/misc.

I was not able to find a way to build the EDAC driver and the PMU driver
with all combinations (builtin and module) so I limited the build options
to module only. The problem is that the select from EDAC or PMU
sets the wrappers build type to whatever EDAC or PMU choose.
But all parts must be either built-in or modules, having the wrapper
builtin and calling into module code will not work. If there is a better
solution please let me know.

The PMU code is the same as in v8.

Add support for various PMU counters found on the Cavium ThunderX and
OcteonTx SoC.

The PMU driver provides common "uncore" functions to avoid code duplication
and support adding more device PMUs (like L2 cache) in the future.

Changes to v8:
- Wrapper for PCI devices

Jan Glauber (7):
edac: thunderx: Remove suspend/resume support
edac,soc: thunderx: Add wrapper for EDAC LMC PCI device
edac,soc: thunderx: Add wrapper for EDAC OCX PCI device
perf: export perf_event_update_userpage()
perf: cavium: Support memory controller PMU counters
perf: cavium: Support transmit-link PMU counters
perf: cavium: Add Documentation

Documentation/perf/cavium-pmu.txt | 75 +++++
drivers/edac/Kconfig | 3 +
drivers/edac/thunderx_edac.c | 92 +-----
drivers/perf/Kconfig | 15 +
drivers/perf/Makefile | 1 +
drivers/perf/cavium_pmu.c | 680 ++++++++++++++++++++++++++++++++++++++
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 1 +
drivers/soc/cavium/Kconfig | 14 +
drivers/soc/cavium/Makefile | 2 +
drivers/soc/cavium/cavium_lmc.c | 53 +++
drivers/soc/cavium/cavium_ocx.c | 49 +++
include/linux/cpuhotplug.h | 1 +
include/linux/soc/cavium/lmc.h | 12 +
include/linux/soc/cavium/ocx.h | 12 +
kernel/events/core.c | 1 +
16 files changed, 933 insertions(+), 79 deletions(-)
create mode 100644 Documentation/perf/cavium-pmu.txt
create mode 100644 drivers/perf/cavium_pmu.c
create mode 100644 drivers/soc/cavium/Kconfig
create mode 100644 drivers/soc/cavium/Makefile
create mode 100644 drivers/soc/cavium/cavium_lmc.c
create mode 100644 drivers/soc/cavium/cavium_ocx.c
create mode 100644 include/linux/soc/cavium/lmc.h
create mode 100644 include/linux/soc/cavium/ocx.h

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2.9.0.rc0.21.g7777322