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authorKan Liang <kan.liang@intel.com>2016-03-20 11:58:21 -0700
committerIngo Molnar <mingo@kernel.org>2016-03-21 11:16:19 +0100
commitcb2252522aaff572f28dc6613307e1e0e62496cd (patch)
tree69d6bb9c78fe6935b0c220a61fad654b41e46f30 /tools/perf/util/build-id.c
parentc7ab62bfbe0e27ef452d19d88b083f01e99f13a7 (diff)
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perf/x86/intel/uncore: Remove ev_sel_ext bit support for PCU
The ev_sel_ext in PCU_MSR_PMON_CTL is locked on some CPU models, so despite it being documented in the SDM, if we write 1 to that bit then we can get a #GP fault. Which #GP the perf fuzzer happily triggered in Peter Zijlstra's testing. Also, there are no public events which use that bit, so remove ev_sel_ext bit support for PCU. Reported-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kan Liang <kan.liang@intel.com> Acked-by: Peter Zijlstra <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: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1458500301-3594-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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