diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2014-02-05 20:48:51 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-02-09 13:08:24 +0100 |
| commit | e97df76377b8b3b1f7dfd5d6f8a1d5a31438b140 (patch) | |
| tree | cd326431ed849d6778b31990970b8fcafac71a2c /arch/x86/kernel/cpu/perf_event.h | |
| parent | 2737fce8bc8dea2852289df29b4f92e6a7fb7c91 (diff) | |
perf/x86/intel/p6: Add userspace RDPMC quirk for PPro
PPro machines can die hard when PCE gets enabled due to a CPU erratum.
The safe way it so disable it by default and keep it disabled.
See erratum 26 in:
http://download.intel.com/design/archives/processors/pro/docs/24268935.pdf
Reported-and-Tested-by: Mark Davies <junk@eslaf.co.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vince@deater.net>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20140206170815.GW2936@laptop.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event.h')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h index c1a861829d81..4972c244d0bc 100644 --- a/arch/x86/kernel/cpu/perf_event.h +++ b/arch/x86/kernel/cpu/perf_event.h @@ -409,6 +409,7 @@ struct x86_pmu { /* * sysfs attrs */ + int attr_rdpmc_broken; int attr_rdpmc; struct attribute **format_attrs; struct attribute **event_attrs; |