diff --git a/drivers/perf/cxl_pmu.c b/drivers/perf/cxl_pmu.c
index 1b1bdb485d7c..f6c4a1b598d8 100644
--- a/drivers/perf/cxl_pmu.c
+++ b/drivers/perf/cxl_pmu.c
@@ -896,7 +896,7 @@ static irqreturn_t cxl_pmu_irq(int irq, void *data)
 
 	overflowed = readq(base + CXL_PMU_OVERFLOW_REG);
 
-	/* Interrupt may be shared, so maybe it isn't ours */
+	/* Nothing overflowed, so the device did not raise this */
 	if (!overflowed)
 		return IRQ_NONE;
 
@@ -999,7 +999,14 @@ static int cxl_pmu_probe(struct device *dev)
 	if (!irq_name)
 		return -ENOMEM;
 
-	rc = devm_request_irq(dev, irq, cxl_pmu_irq, IRQF_SHARED | IRQF_NO_THREAD,
+	/*
+	 * The handler must run on info->on_cpu, so the interrupt cannot be
+	 * shared - IRQF_NOBALANCING is only honoured for the first action on a
+	 * line, and a co-owner would keep taking the interrupt wherever its own
+	 * affinity points.
+	 */
+	rc = devm_request_irq(dev, irq, cxl_pmu_irq,
+			      IRQF_NO_THREAD | IRQF_NOBALANCING,
 			      irq_name, info);
 	if (rc)
 		return rc;