BACKPORT: WIP: perf: Add Arm CMN-600 PMU driver

This is a very alpha-quality driver for basic PMU event counting on the CMN-600 interconnect. There are many many things it does not yet do, but what I don't know is which of those things it needs to do next. This patch is part of the eMAG2 CMN-600 PMU patch set. This patch is backported from: http://www.linux-arm.org/git?p=linux-rm.git;a=commit;h=3157d338542a100907fb71d3a80a2eaa259e9a9f Signed-off-by: Robin Murphy <[email protected]> Signed-off-by: Khuong Dinh <[email protected]>
AmpereComputing · Apr 21, 2020 · e578012 · e578012
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diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
@@ -40,6 +40,13 @@ config ARM_CCN
 	  PMU (perf) driver supporting the ARM CCN (Cache Coherent Network)
 	  interconnect.
 
+config ARM_CMN
+	tristate "Arm CMN-600 PMU support"
+	depends on ARM || ARM64
+	help
+	  Support for PMU events monitoring on the Arm CMN-600 Coherent Mesh
+	  Network interconnect.
+
 config ARM_PMU
 	depends on ARM || ARM64
 	bool "ARM PMU framework"

diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_ARM_CCI_PMU) += arm-cci.o
 obj-$(CONFIG_ARM_CCN) += arm-ccn.o
+obj-$(CONFIG_ARM_CMN) += arm-cmn.o
 obj-$(CONFIG_ARM_DSU_PMU) += arm_dsu_pmu.o
 obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o
 obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o