Commit 1b8873a0 authored by Jamie Iles's avatar Jamie Iles Committed by Russell King
Browse files

ARM: 5902/4: arm/perfevents: implement perf event support for ARMv6 



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: default avatarJamie Iles <jamie.iles@picochip.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 7ada189f

arch/arm/Kconfig

+8 −0
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

+1 −0
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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