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perf/x86: Enable Intel Cedarview Atom suppport

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This patch enables perf_events support for Intel Cedarview
Atom (model 54) processors. Support includes PEBS and LBR.
Tested on my Atom N2600 netbook.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120820092421.GA11284@quad
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Stephane Eranian 2012-08-20 11:24:21 +02:00 committed by Ingo Molnar
parent a6fa941d94
commit 3ec18cd8b8
2 changed files with 3 additions and 1 deletions
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1
arch/x86/kernel/cpu/perf_event_intel.c
View File

@ -2008,6 +2008,7 @@ __init int intel_pmu_init(void)
break;
case 28: /* Atom */
case 54: /* Cedariew */
memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
sizeof(hw_cache_event_ids));

3
arch/x86/kernel/cpu/perf_event_intel_lbr.c
View File

@ -686,7 +686,8 @@ void intel_pmu_lbr_init_atom(void)
* to have an operational LBR which can freeze
* on PMU interrupt
*/
if (boot_cpu_data.x86_mask < 10) {
if (boot_cpu_data.x86_model == 28
&& boot_cpu_data.x86_mask < 10) {
pr_cont("LBR disabled due to erratum");
return;
}