Commit 53c218da authored by Tuan Phan's avatar Tuan Phan Committed by Will Deacon
Browse files

driver/perf: Add PMU driver for the ARM DMC-620 memory controller 



DMC-620 PMU supports total 10 counters which each is
independently programmable to different events and can
be started and stopped individually.

Currently, it only supports ACPI. Other platforms feel free to test and add
support for device tree.

Usage example:
  #perf stat -e arm_dmc620_10008c000/clk_cycle_count/ -C 0
  Get perf event for clk_cycle_count counter.

  #perf stat -e arm_dmc620_10008c000/clkdiv2_allocate,mask=0x1f,match=0x2f,
  incr=2,invert=1/ -C 0
  The above example shows how to specify mask, match, incr,
  invert parameters for clkdiv2_allocate event.

Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarTuan Phan <tuanphan@os.amperecomputing.com>
Link: https://lore.kernel.org/r/1604518246-6198-1-git-send-email-tuanphan@os.amperecomputing.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent f8394f23

drivers/perf/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -130,6 +130,13 @@ config ARM_SPE_PMU 
	  Extension, which provides periodic sampling of operations in

	  the CPU pipeline and reports this via the perf AUX interface.



config ARM_DMC620_PMU

	tristate "Enable PMU support for the ARM DMC-620 memory controller"

	depends on (ARM64 && ACPI) || COMPILE_TEST

	help

	  Support for PMU events monitoring on the ARM DMC-620 memory

	  controller.



source "drivers/perf/hisilicon/Kconfig"



endmenu

drivers/perf/Makefile

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Original line number Diff line number Diff line
@@ -13,3 +13,4 @@ obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o 
obj-$(CONFIG_THUNDERX2_PMU) += thunderx2_pmu.o

obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o

obj-$(CONFIG_ARM_SPE_PMU) += arm_spe_pmu.o

obj-$(CONFIG_ARM_DMC620_PMU) += arm_dmc620_pmu.o

drivers/perf/arm_dmc620_pmu.c

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File added.

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