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arm64: perf: factor out callchain code

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We currently bundle the callchain handling code with the PMU code,
despite the fact the two are distinct, and the former can be useful even
in the absence of the latter.

Follow the example of arch/arm and factor the callchain handling into
its own file dependent on CONFIG_PERF_EVENTS rather than
CONFIG_HW_PERF_EVENTS.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland
2015-07-06 12:23:54 +01:00
committed by Will Deacon
parent 23e9499446
commit 52da443ec4
4 changed files with 198 additions and 180 deletions
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2
arch/arm64/include/asm/perf_event.h
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@@ -17,7 +17,7 @@
#ifndef __ASM_PERF_EVENT_H
#define __ASM_PERF_EVENT_H
#ifdef CONFIG_HW_PERF_EVENTS
#ifdef CONFIG_PERF_EVENTS
struct pt_regs;
extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
extern unsigned long perf_misc_flags(struct pt_regs *regs);