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perf, x86: Move perfctr init code to x86_setup_perfctr()

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Split __hw_perf_event_init() to configure pmu events other than
perfctrs. Perfctr code is moved to a separate function
x86_setup_perfctr(). This and the following patches refactor the code.

Split in multiple patches for better review.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1271190201-25705-2-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robert Richter 2010-04-13 22:23:10 +02:00 committed by Ingo Molnar
parent a0507c84bf
commit 4261e0e0ef
1 changed files with 14 additions and 6 deletions
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20
arch/x86/kernel/cpu/perf_event.c
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@ -426,6 +426,8 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event_attr *attr)
return 0;
}
static int x86_setup_perfctr(struct perf_event *event);
static int x86_pmu_hw_config(struct perf_event *event)
{
/*
@ -453,9 +455,6 @@ static int x86_pmu_hw_config(struct perf_event *event)
*/
static int __hw_perf_event_init(struct perf_event *event)
{
struct perf_event_attr *attr = &event->attr;
struct hw_perf_event *hwc = &event->hw;
u64 config;
int err;
if (!x86_pmu_initialized())
@ -482,15 +481,24 @@ static int __hw_perf_event_init(struct perf_event *event)
event->destroy = hw_perf_event_destroy;
hwc->idx = -1;
hwc->last_cpu = -1;
hwc->last_tag = ~0ULL;
event->hw.idx = -1;
event->hw.last_cpu = -1;
event->hw.last_tag = ~0ULL;
/* Processor specifics */
err = x86_pmu.hw_config(event);
if (err)
return err;
return x86_setup_perfctr(event);
}
static int x86_setup_perfctr(struct perf_event *event)
{
struct perf_event_attr *attr = &event->attr;
struct hw_perf_event *hwc = &event->hw;
u64 config;
if (!hwc->sample_period) {
hwc->sample_period = x86_pmu.max_period;
hwc->last_period = hwc->sample_period;