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perf/x86: Add 'index' param to get_event_constraint() callback

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This patch adds an index parameter to the get_event_constraint()
x86_pmu callback. It is expected to represent the index of the
event in the cpuc->event_list[] array. When the callback is used
for fake_cpuc (evnet validation), then the index must be -1. The
motivation for passing the index is to use it to index into another
cpuc array.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: bp@alien8.de
Cc: jolsa@redhat.com
Cc: kan.liang@intel.com
Cc: maria.n.dimakopoulou@gmail.com
Link: http://lkml.kernel.org/r/1416251225-17721-5-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Stephane Eranian
2014-11-17 20:06:56 +01:00
committed by Ingo Molnar
parent c5362c0c37
commit 79cba82244
4 changed files with 19 additions and 10 deletions
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4
arch/x86/kernel/cpu/perf_event.c
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@@ -789,7 +789,7 @@ int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
for (i = 0, wmin = X86_PMC_IDX_MAX, wmax = 0; i < n; i++) {
hwc = &cpuc->event_list[i]->hw;
c = x86_pmu.get_event_constraints(cpuc, cpuc->event_list[i]);
c = x86_pmu.get_event_constraints(cpuc, i, cpuc->event_list[i]);
hwc->constraint = c;
wmin = min(wmin, c->weight);
@@ -1777,7 +1777,7 @@ static int validate_event(struct perf_event *event)
if (IS_ERR(fake_cpuc))
return PTR_ERR(fake_cpuc);
c = x86_pmu.get_event_constraints(fake_cpuc, event);
c = x86_pmu.get_event_constraints(fake_cpuc, -1, event);
if (!c || !c->weight)
ret = -EINVAL;