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perf/core: Disallow uncore-cgroup events
While discussing uncore event scheduling, I noticed we do not in fact seem to dis-allow making uncore-cgroup events. Such events make no sense what so ever because the cgroup is a CPU local state where uncore counts across a number of CPUs. Disallow them. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -10535,6 +10535,15 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
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goto err_ns;
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}
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/*
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* Disallow uncore-cgroup events, they don't make sense as the cgroup will
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* be different on other CPUs in the uncore mask.
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*/
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if (pmu->task_ctx_nr == perf_invalid_context && cgroup_fd != -1) {
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err = -EINVAL;
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goto err_pmu;
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}
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if (event->attr.aux_output &&
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!(pmu->capabilities & PERF_PMU_CAP_AUX_OUTPUT)) {
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err = -EOPNOTSUPP;
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