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perf, x86: Provide means for disabling userspace RDPMC

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Allow the disabling of RDPMC via a pmu specific attribute:

  echo 0 > /sys/bus/event_source/devices/cpu/rdpmc

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Arun Sharma <asharma@fb.com>
Link: http://lkml.kernel.org/n/tip-pqeog465zo5hsimtkfz73f27@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-11-20 23:30:47 +01:00 • committed by Ingo Molnar
parent fe4a330885
commit 0c9d42ed4c
4 changed files with 64 additions and 1 deletions
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1
include/linux/perf_event.h
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@ -615,6 +615,7 @@ struct pmu {
struct list_head entry;
struct device *dev;
const struct attribute_group **attr_groups;
char *name;
int type;