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| author | Kan Liang <kan.liang@intel.com> | 2016-03-20 18:58:21 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-03-21 10:16:19 (GMT) |
| commit | cb2252522aaff572f28dc6613307e1e0e62496cd (patch) | |
| tree | 69d6bb9c78fe6935b0c220a61fad654b41e46f30 /lib/test_hexdump.c | |
| parent | c7ab62bfbe0e27ef452d19d88b083f01e99f13a7 (diff) | |
| download | linux-cb2252522aaff572f28dc6613307e1e0e62496cd.tar.xz | |
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>
Diffstat (limited to 'lib/test_hexdump.c')
0 files changed, 0 insertions, 0 deletions