diff --git a/drivers/resctrl/mpam_devices.c b/drivers/resctrl/mpam_devices.c
index 21fccc3ff002..c126a95490f1 100644
--- a/drivers/resctrl/mpam_devices.c
+++ b/drivers/resctrl/mpam_devices.c
@@ -29,6 +29,8 @@
 
 #include "mpam_internal.h"
 
+DEFINE_STATIC_KEY_FALSE(mpam_enabled); /* This moves to arch code */
+
 /*
  * mpam_list_lock protects the SRCU lists when writing. Once the
  * mpam_enabled key is enabled these lists are read-only,
@@ -936,6 +938,9 @@ static int mpam_discovery_cpu_online(unsigned int cpu)
 	struct mpam_msc *msc;
 	bool new_device_probed = false;
 
+	if (mpam_is_enabled())
+		return 0;
+
 	guard(srcu)(&mpam_srcu);
 	list_for_each_entry_srcu(msc, &mpam_all_msc, all_msc_list,
 				 srcu_read_lock_held(&mpam_srcu)) {
@@ -1471,6 +1476,10 @@ static irqreturn_t __mpam_irq_handler(int irq, struct mpam_msc *msc)
 	/* Disable this interrupt. */
 	mpam_disable_msc_ecr(msc);
 
+	/* Are we racing with the thread disabling MPAM? */
+	if (!mpam_is_enabled())
+		return IRQ_HANDLED;
+
 	/*
 	 * Schedule the teardown work. Don't use a threaded IRQ as we can't
 	 * unregister the interrupt from the threaded part of the handler.
@@ -1605,6 +1614,7 @@ static void mpam_enable_once(void)
 		return;
 	}
 
+	static_branch_enable(&mpam_enabled);
 	mpam_register_cpuhp_callbacks(mpam_cpu_online, mpam_cpu_offline,
 				      "mpam:online");
 
@@ -1671,6 +1681,8 @@ void mpam_disable(struct work_struct *ignored)
 	}
 	mutex_unlock(&mpam_cpuhp_state_lock);
 
+	static_branch_disable(&mpam_enabled);
+
 	mpam_unregister_irqs();
 
 	idx = srcu_read_lock(&mpam_srcu);
diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h
index fa9d9a176a54..93a629f6e15a 100644
--- a/drivers/resctrl/mpam_internal.h
+++ b/drivers/resctrl/mpam_internal.h
@@ -9,6 +9,7 @@
 #include <linux/bitmap.h>
 #include <linux/cpumask.h>
 #include <linux/io.h>
+#include <linux/jump_label.h>
 #include <linux/llist.h>
 #include <linux/mutex.h>
 #include <linux/srcu.h>
@@ -20,6 +21,13 @@
 
 struct platform_device;
 
+DECLARE_STATIC_KEY_FALSE(mpam_enabled);
+
+static inline bool mpam_is_enabled(void)
+{
+	return static_branch_likely(&mpam_enabled);
+}
+
 /*
  * Structures protected by SRCU may not be freed for a surprising amount of
  * time (especially if perf is running). To ensure the MPAM error interrupt can