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perf/x86/intel/uncore: Fix PCU filter setup for Sandy/Ivy/Haswell EP

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The PCU frequency band filters use 8 bit each in a register.
When setting up the value the shift value was not correctly
scaled, which resulted in all filters except for band 0 to
be zero. Fix the scaling.

This allows to correctly monitor multiple uncore frequency bands.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1409872109-31645-5-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andi Kleen 2014-09-04 16:08:29 -07:00 committed by Ingo Molnar
parent 7e96ae1a89
commit b10fc1c3e3
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/cpu/perf_event_intel_uncore_snbep.c
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@ -841,7 +841,7 @@ static int snbep_pcu_hw_config(struct intel_uncore_box *box, struct perf_event *
if (ev_sel >= 0xb && ev_sel <= 0xe) {
reg1->reg = SNBEP_PCU_MSR_PMON_BOX_FILTER;
reg1->idx = ev_sel - 0xb;
reg1->config = event->attr.config1 & (0xff << reg1->idx);
reg1->config = event->attr.config1 & (0xff << (reg1->idx * 8));
}
return 0;
}