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Commit 796d1295 authored by Jean PIHET's avatar Jean PIHET Committed by Russell King
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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: default avatarJean Pihet <jpihet@mvista.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 1b8873a0

arch/arm/Kconfig

+1 −1
Original line number Original line Diff line number Diff line
@@ -1176,7 +1176,7 @@ config HIGHPTE 




config HW_PERF_EVENTS

config HW_PERF_EVENTS

	bool "Enable hardware performance counter support for 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

	default y

	help

	help

	  Enable hardware performance counter support for perf events. If

	  Enable hardware performance counter support for perf events. If

arch/arm/kernel/perf_event.c

+932 −4

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