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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-03-02 12:35:37 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-03-02 15:06:46 +0100 |
| commit | 320ebf09cbb6d01954c9a060266aa8e0d27f4638 (patch) | |
| tree | 0069898e64171dd89834327b0180c6d90860b46a | |
| parent | bb1165d6882f423f90fc7007a88c6c993b7c2ac4 (diff) | |
| download | op-kernel-dev-320ebf09cbb6d01954c9a060266aa8e0d27f4638.zip op-kernel-dev-320ebf09cbb6d01954c9a060266aa8e0d27f4638.tar.gz | |
perf, x86: Restrict the ANY flag
The ANY flag can show SMT data of another task (like 'top'),
so we want to disable it when system-wide profiling is
disabled.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 3 | ||||
| -rw-r--r-- | include/linux/perf_event.h | 15 | ||||
| -rw-r--r-- | kernel/perf_event.c | 15 |
3 files changed, 18 insertions, 15 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 6531b4b..aab2e1c 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -503,6 +503,9 @@ static int __hw_perf_event_init(struct perf_event *event) */ if (attr->type == PERF_TYPE_RAW) { hwc->config |= x86_pmu.raw_event(attr->config); + if ((hwc->config & ARCH_PERFMON_EVENTSEL_ANY) && + perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN)) + return -EACCES; return 0; } diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 04f06b4..90e0521 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -857,6 +857,21 @@ extern int sysctl_perf_event_paranoid; extern int sysctl_perf_event_mlock; extern int sysctl_perf_event_sample_rate; +static inline bool perf_paranoid_tracepoint_raw(void) +{ + return sysctl_perf_event_paranoid > -1; +} + +static inline bool perf_paranoid_cpu(void) +{ + return sysctl_perf_event_paranoid > 0; +} + +static inline bool perf_paranoid_kernel(void) +{ + return sysctl_perf_event_paranoid > 1; +} + extern void perf_event_init(void); extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record, int entry_size); extern void perf_bp_event(struct perf_event *event, void *data); diff --git a/kernel/perf_event.c b/kernel/perf_event.c index a661e79..482d5e1 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -56,21 +56,6 @@ static atomic_t nr_task_events __read_mostly; */ int sysctl_perf_event_paranoid __read_mostly = 1; -static inline bool perf_paranoid_tracepoint_raw(void) -{ - return sysctl_perf_event_paranoid > -1; -} - -static inline bool perf_paranoid_cpu(void) -{ - return sysctl_perf_event_paranoid > 0; -} - -static inline bool perf_paranoid_kernel(void) -{ - return sysctl_perf_event_paranoid > 1; -} - int sysctl_perf_event_mlock __read_mostly = 512; /* 'free' kb per user */ /* |
