perfcounters: add PERF_COUNT_BUS_CYCLES

Generalize "bus cycles" hw events - and map them to CPU_CLK_Unhalted.Ref
on x86. (which is a good enough approximation)

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index f3359c2b3910..86b2fdd344a6 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -41,12 +41,13 @@ static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters);
 
 static const int intel_perfmon_event_map[] =
 {
-  [PERF_COUNT_CYCLES]                   = 0x003c,
+  [PERF_COUNT_CPU_CYCLES]               = 0x003c,
   [PERF_COUNT_INSTRUCTIONS]             = 0x00c0,
   [PERF_COUNT_CACHE_REFERENCES]         = 0x4f2e,
   [PERF_COUNT_CACHE_MISSES]             = 0x412e,
   [PERF_COUNT_BRANCH_INSTRUCTIONS]      = 0x00c4,
   [PERF_COUNT_BRANCH_MISSES]            = 0x00c5,
+  [PERF_COUNT_BUS_CYCLES]               = 0x013c,
 };
 
 static const int max_intel_perfmon_events = ARRAY_SIZE(intel_perfmon_event_map);