[PATCH] perf/x86/intel: Only check GP counters for PEBS constraints validation

[Dapeng Mi]

It's good enough to only check GP counters for PEBS constraints
validation since constraints overlap can only happen on GP counters.

Besides opportunistically refine the code style and use pr_warn() to
replace pr_info() as the message itself is a warning message.

Signed-off-by: Dapeng Mi <dapeng1.mi@xxxxxxxxxxxxxxx>
---
 arch/x86/events/intel/core.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index aad89c9d9514..81e6c8bcabde 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5506,7 +5506,7 @@ static void __intel_pmu_check_dyn_constr(struct event_constraint *constr,
 			}
 
 			if (check_fail) {
-				pr_info("The two events 0x%llx and 0x%llx may not be "
+				pr_warn("The two events 0x%llx and 0x%llx may not be "
 					"fully scheduled under some circumstances as "
 					"%s.\n",
 					c1->code, c2->code, dyn_constr_type_name[type]);
@@ -5519,6 +5519,7 @@ static void intel_pmu_check_dyn_constr(struct pmu *pmu,
 				       struct event_constraint *constr,
 				       u64 cntr_mask)
 {
+	u64 gp_mask = GENMASK_ULL(INTEL_PMC_MAX_GENERIC - 1, 0);
 	enum dyn_constr_type i;
 	u64 mask;
 
@@ -5533,20 +5534,25 @@ static void intel_pmu_check_dyn_constr(struct pmu *pmu,
 				mask = x86_pmu.lbr_counters;
 			break;
 		case DYN_CONSTR_ACR_CNTR:
-			mask = hybrid(pmu, acr_cntr_mask64) & GENMASK_ULL(INTEL_PMC_MAX_GENERIC - 1, 0);
+			mask = hybrid(pmu, acr_cntr_mask64) & gp_mask;
 			break;
 		case DYN_CONSTR_ACR_CAUSE:
-			if (hybrid(pmu, acr_cntr_mask64) == hybrid(pmu, acr_cause_mask64))
+			if (hybrid(pmu, acr_cntr_mask64) ==
+					hybrid(pmu, acr_cause_mask64))
 				continue;
-			mask = hybrid(pmu, acr_cause_mask64) & GENMASK_ULL(INTEL_PMC_MAX_GENERIC - 1, 0);
+			mask = hybrid(pmu, acr_cause_mask64) & gp_mask;
 			break;
 		case DYN_CONSTR_PEBS:
-			if (x86_pmu.arch_pebs)
-				mask = hybrid(pmu, arch_pebs_cap).counters;
+			if (x86_pmu.arch_pebs) {
+				mask = hybrid(pmu, arch_pebs_cap).counters &
+				       gp_mask;
+			}
 			break;
 		case DYN_CONSTR_PDIST:
-			if (x86_pmu.arch_pebs)
-				mask = hybrid(pmu, arch_pebs_cap).pdists;
+			if (x86_pmu.arch_pebs) {
+				mask = hybrid(pmu, arch_pebs_cap).pdists &
+				       gp_mask;
+			}
 			break;
 		default:
 			pr_warn("Unsupported dynamic constraint type %d\n", i);

base-commit: 2093d8cf80fa5552d1025a78a8f3a10bf3b6466e
-- 
2.34.1