From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 7 Nov 2025 13:50:16 +0000 (+0100)
Subject: perf/x86/intel: Check PEBS dyn_constraints
X-Git-Tag: v6.19-rc1~234^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02da693f6658b9f73b97fce3695358ef3f13d0d1;p=thirdparty%2Fkernel%2Flinux.git

perf/x86/intel: Check PEBS dyn_constraints

Handle the interaction between ("perf/x86/intel: Update dyn_constraint
base on PEBS event precise level") and ("perf/x86/intel: Add a check
for dynamic constraints").

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 93780affeec82..a421595fdd766 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5425,6 +5425,8 @@ enum dyn_constr_type {
 	DYN_CONSTR_BR_CNTR,
 	DYN_CONSTR_ACR_CNTR,
 	DYN_CONSTR_ACR_CAUSE,
+	DYN_CONSTR_PEBS,
+	DYN_CONSTR_PDIST,
 
 	DYN_CONSTR_MAX,
 };
@@ -5434,6 +5436,8 @@ static const char * const dyn_constr_type_name[] = {
 	[DYN_CONSTR_BR_CNTR] = "a branch counter logging event",
 	[DYN_CONSTR_ACR_CNTR] = "an auto-counter reload event",
 	[DYN_CONSTR_ACR_CAUSE] = "an auto-counter reload cause event",
+	[DYN_CONSTR_PEBS] = "a PEBS event",
+	[DYN_CONSTR_PDIST] = "a PEBS PDIST event",
 };
 
 static void __intel_pmu_check_dyn_constr(struct event_constraint *constr,
@@ -5538,6 +5542,14 @@ static void intel_pmu_check_dyn_constr(struct pmu *pmu,
 				continue;
 			mask = hybrid(pmu, acr_cause_mask64) & GENMASK_ULL(INTEL_PMC_MAX_GENERIC - 1, 0);
 			break;
+		case DYN_CONSTR_PEBS:
+			if (x86_pmu.arch_pebs)
+				mask = hybrid(pmu, arch_pebs_cap).counters;
+			break;
+		case DYN_CONSTR_PDIST:
+			if (x86_pmu.arch_pebs)
+				mask = hybrid(pmu, arch_pebs_cap).pdists;
+			break;
 		default:
 			pr_warn("Unsupported dynamic constraint type %d\n", i);
 		}