perf_counter: More paranoia settings

Rename the perf_counter_priv knob to perf_counter_paranoia (because
priv can be read as private, as opposed to privileged) and provide
one more level:

 0 - permissive
 1 - restrict cpu counters to privilidged contexts
 2 - restrict kernel-mode code counting and profiling

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 3 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 0c4bf863afa..344a65981de 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -916,9 +916,9 @@ static struct ctl_table kern_table[] = {
 #ifdef CONFIG_PERF_COUNTERS
         {
                 .ctl_name       = CTL_UNNUMBERED,
-                .procname       = "perf_counter_privileged",
-                .data           = &sysctl_perf_counter_priv,
-                .maxlen         = sizeof(sysctl_perf_counter_priv),
+                .procname       = "perf_counter_paranoid",
+                .data           = &sysctl_perf_counter_paranoid,
+                .maxlen         = sizeof(sysctl_perf_counter_paranoid),
                 .mode           = 0644,
                 .proc_handler   = &proc_dointvec,
         },