forked from Minki/linux
25d3584797
This is purely a cosmetic change to the ARM perf backend because the current comments about the relationship between NMIs, interrupt context and perf_event_do_pending are misleading. This patch updates the comments so that they reflect what the code actually does (which is in line with other architectures). Acked-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/*
|
|
* 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 disabled.
|
|
*/
|
|
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
|
|
|
|
/* ARM perf PMU IDs for use by internal perf clients. */
|
|
enum arm_perf_pmu_ids {
|
|
ARM_PERF_PMU_ID_XSCALE1 = 0,
|
|
ARM_PERF_PMU_ID_XSCALE2,
|
|
ARM_PERF_PMU_ID_V6,
|
|
ARM_PERF_PMU_ID_V6MP,
|
|
ARM_PERF_PMU_ID_CA8,
|
|
ARM_PERF_PMU_ID_CA9,
|
|
ARM_NUM_PMU_IDS,
|
|
};
|
|
|
|
extern enum arm_perf_pmu_ids
|
|
armpmu_get_pmu_id(void);
|
|
|
|
extern int
|
|
armpmu_get_max_events(void);
|
|
|
|
#endif /* __ARM_PERF_EVENT_H__ */
|