perf/x86/intel: Expose LBR callstack to user space tooling
With LBR call stack feature enable, there are three callchain options. Enable the 3rd callchain option (LBR callstack) to user space tooling. Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Kan Liang <kan.liang@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: linux-api@vger.kernel.org Link: http://lkml.kernel.org/r/20141105093759.GQ10501@worktop.programming.kicks-ass.netSigned-off-by: NIngo Molnar <mingo@kernel.org>
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