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

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
...@@ -1174,6 +1174,14 @@ config HIGHPTE ...@@ -1174,6 +1174,14 @@ config HIGHPTE
depends on HIGHMEM depends on HIGHMEM
depends on !OUTER_CACHE 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" source "mm/Kconfig"
config LEDS config LEDS
......
...@@ -47,6 +47,7 @@ obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o ...@@ -47,6 +47,7 @@ obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
obj-$(CONFIG_IWMMXT) += iwmmxt.o obj-$(CONFIG_IWMMXT) += iwmmxt.o
obj-$(CONFIG_CPU_HAS_PMU) += pmu.o obj-$(CONFIG_CPU_HAS_PMU) += pmu.o
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
ifneq ($(CONFIG_ARCH_EBSA110),y) ifneq ($(CONFIG_ARCH_EBSA110),y)
......
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