[PATCH V5 RESEND 03/14] perf/x86/intel: Move BTS index to 47

kan.liang
2020-01-06T20:31:08Z

The bit 48 in the PERF_GLOBAL_STATUS is used to indicate the overflow
status of PERF_METRICS counters now.

Move BTS index to 47.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---

No changes since V4

arch/x86/include/asm/perf_event.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 55a4d05ba6ec..7df1d5b78aa8 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -185,11 +185,11 @@ struct x86_pmu_capability {
/*
* We model BTS tracing as another fixed-mode PMC.
*
- * We choose a value in the middle of the fixed event range, since lower
+ * We choose value 47 for the fixed index of BTS, since lower
* values are used by actual fixed events and higher values are used
* to indicate other overflow conditions in the PERF_GLOBAL_STATUS msr.
*/
-#define INTEL_PMC_IDX_FIXED_BTS (INTEL_PMC_IDX_FIXED + 16)
+#define INTEL_PMC_IDX_FIXED_BTS (INTEL_PMC_IDX_FIXED + 15)

#define GLOBAL_STATUS_COND_CHG BIT_ULL(63)
#define GLOBAL_STATUS_BUFFER_OVF BIT_ULL(62)
--
2.17.1