Commit 796d1295 authored Jan 26, 2010 by Jean PIHET Committed by Russell King Feb 12, 2010

ARM: 5903/1: arm/perfevents: add support for ARMv7



Adds the Performance Events support for ARMv7 processor, using
the PMNC unit in HW.

Supports the following:
- Cortex-A8 and Cortex-A9 processors,
- dynamic detection of the number of available counters,
   based on the PMCR value,
- runtime detection of the CPU arch (v6 or v7)
   and model (Cortex-A8 or Cortex-A9)

Tested on OMAP3 (Cortex-A8) only.

Signed-off-by: Jean Pihet <jpihet@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 1b8873a0

arch/arm/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -1176,7 +1176,7 @@ config HIGHPTE

		config HW_PERF_EVENTS
		bool "Enable hardware performance counter support for perf events"
		depends on PERF_EVENTS && CPU_HAS_PMU && CPU_V6
		depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 \|\| CPU_V7)
		default y
		help
		Enable hardware performance counter support for perf events. If

arch/arm/kernel/perf_event.c

+932 −4

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