ARM: 5902/4: arm/perfevents: implement perf event support for ARMv6 (1b8873a0) · Commits · 戴 / test

This patch implements support for ARMv6 performance counters in the Linux performance events subsystem. ARMv6 architectures that have the performance counters should enable HW_PERF_EVENTS to get hardware performance events support in addition to the software events. Note: only ARM Ltd ARM cores are supported. This implementation also provides an ARM PMU abstraction layer to allow ARMv7 and others to be supported in the future by adding new a 'struct arm_pmu'. Cc: Jean Pihet <jpihet@mvista.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by:

Jamie Iles <jamie.iles@picochip.com> Signed-off-by:

Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

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Original line number	Diff line number	Diff line
		@@ -1174,6 +1174,14 @@ config HIGHPTE
		depends on HIGHMEM
		depends on !OUTER_CACHE

		config HW_PERF_EVENTS
		bool "Enable hardware performance counter support for perf events"
		depends on PERF_EVENTS && CPU_HAS_PMU && CPU_V6
		default y
		help
		Enable hardware performance counter support for perf events. If
		disabled, perf events will use software events only.

		source "mm/Kconfig"

		config LEDS

arch/arm/kernel/Makefile

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Original line number	Diff line number	Diff line
		@@ -47,6 +47,7 @@ obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
		obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
		obj-$(CONFIG_IWMMXT) += iwmmxt.o
		obj-$(CONFIG_CPU_HAS_PMU) += pmu.o
		obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
		AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt

		ifneq ($(CONFIG_ARCH_EBSA110),y)

arch/arm/kernel/perf_event.c

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