linux-kernel - [PATCH V4 02/14] perf/x86/intel: Set correct mask for TOPDOWN.SLOTS

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Date:   Mon, 16 Sep 2019 06:41:16 -0700
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, acme@...nel.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, jolsa@...nel.org, eranian@...gle.com,
        alexander.shishkin@...ux.intel.com, ak@...ux.intel.com,
        Kan Liang <kan.liang@...ux.intel.com>
Subject: [PATCH V4 02/14] perf/x86/intel: Set correct mask for TOPDOWN.SLOTS

From: Kan Liang <kan.liang@...ux.intel.com>

TOPDOWN.SLOTS(0x0400) is not a generic event. It is only available on
fixed counter3.

Don't extend its mask to generic counters.

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

Changes since V3:
- Separate fixed counter3 definition patch

 arch/x86/events/intel/core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 43c966d1208e..f0208ee554fc 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5106,12 +5106,14 @@ __init int intel_pmu_init(void)
 
 	if (x86_pmu.event_constraints) {
 		/*
-		 * event on fixed counter2 (REF_CYCLES) only works on this
+		 * event on fixed counter2 (REF_CYCLES) and
+		 * fixed counter3 (TOPDOWN.SLOTS) only work on this
 		 * counter, so do not extend mask to generic counters
 		 */
 		for_each_event_constraint(c, x86_pmu.event_constraints) {
 			if (c->cmask == FIXED_EVENT_FLAGS
-			    && c->idxmsk64 != INTEL_PMC_MSK_FIXED_REF_CYCLES) {
+			    && c->idxmsk64 != INTEL_PMC_MSK_FIXED_REF_CYCLES
+			    && c->idxmsk64 != INTEL_PMC_MSK_FIXED_SLOTS) {
 				c->idxmsk64 |= (1ULL << x86_pmu.num_counters) - 1;
 			}
 			c->idxmsk64 &=
-- 
2.17.1