diff options
| author | Jamie Iles <jamie.iles@picochip.com> | 2010-02-02 22:24:58 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-12 20:25:53 +0300 |
| commit | 7ada189f5c8627662c23f49b3e68463f86fc511e (patch) | |
| tree | 3b4b15586e3e81ec0bbca292dd9a1ed8175e717e /arch/arm/include | |
| parent | 1618fdd9602c689de2f820a88cb3e283a39c3d90 (diff) | |
| download | linux-7ada189f5c8627662c23f49b3e68463f86fc511e.tar.xz | |
ARM: 5900/2: arm: enable support for software perf events
The perf events subsystem allows counting of both hardware and
software events. This patch implements the bare minimum for software
performance events.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/perf_event.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/include/asm/perf_event.h b/arch/arm/include/asm/perf_event.h new file mode 100644 index 000000000000..49e3049aba32 --- /dev/null +++ b/arch/arm/include/asm/perf_event.h @@ -0,0 +1,31 @@ +/* + * linux/arch/arm/include/asm/perf_event.h + * + * Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef __ARM_PERF_EVENT_H__ +#define __ARM_PERF_EVENT_H__ + +/* + * NOP: on *most* (read: all supported) ARM platforms, the performance + * counter interrupts are regular interrupts and not an NMI. This + * means that when we receive the interrupt we can call + * perf_event_do_pending() that handles all of the work with + * interrupts enabled. + */ +static inline void +set_perf_event_pending(void) +{ +} + +/* ARM performance counters start from 1 (in the cp15 accesses) so use the + * same indexes here for consistency. */ +#define PERF_EVENT_INDEX_OFFSET 1 + +#endif /* __ARM_PERF_EVENT_H__ */ |