diff --git a/arch/arm64/include/asm/resctrl.h b/arch/arm64/include/asm/resctrl.h
index d7b70916a42ba5a117aea2435c8fb9023305815a..f2157df661af5295e0b7aadd334d41298d8da25b 100644
--- a/arch/arm64/include/asm/resctrl.h
+++ b/arch/arm64/include/asm/resctrl.h
@@ -444,6 +444,32 @@ int parse_rdtgroupfs_options(char *data);
 
 int resctrl_group_add_files(struct kernfs_node *kn, unsigned long fflags);
 
+static inline void resctrl_cdp_update_cpus_state(struct resctrl_group *rdtgrp)
+{
+	int cpu;
+
+	/*
+	 * If cdp on, tasks in resctrl default group with closid=0
+	 * and rmid=0 don't know how to fill proper partid_i/pmg_i
+	 * and partid_d/pmg_d into MPAMx_ELx sysregs by mpam_sched_in()
+	 * called by __switch_to(), it's because current cpu's default
+	 * closid and rmid are also equal to 0 and make the operation
+	 * modifying configuration passed. Update per cpu default closid
+	 * of none-zero value, call update_closid_rmid() to update each
+	 * cpu's mpam proper MPAMx_ELx sysregs for setting partid and
+	 * pmg when mounting resctrl sysfs, which is a practical method;
+	 * Besides, to support cpu online and offline we should set
+	 * cur_closid to 0.
+	 */
+	for_each_cpu(cpu, &rdtgrp->cpu_mask) {
+		per_cpu(pqr_state.default_closid, cpu) = ~0;
+		per_cpu(pqr_state.cur_closid, cpu) = 0;
+	}
+
+	update_closid_rmid(&rdtgrp->cpu_mask, NULL);
+}
+
+
 #define RESCTRL_MAX_CBM 32
 
 struct resctrl_fs_context {
diff --git a/arch/arm64/kernel/mpam/mpam_resctrl.c b/arch/arm64/kernel/mpam/mpam_resctrl.c
index 546b209a0c774f89f8c6022171be65015338c556..0746800feb5d8d5cbb604399b584807f929271fb 100644
--- a/arch/arm64/kernel/mpam/mpam_resctrl.c
+++ b/arch/arm64/kernel/mpam/mpam_resctrl.c
@@ -85,15 +85,24 @@ static bool resctrl_cdp_enabled;
 
 int mpam_resctrl_set_default_cpu(unsigned int cpu)
 {
-    /* The cpu is set in default rdtgroup after online. */
+	/* The cpu is set in default rdtgroup after online. */
 	cpumask_set_cpu(cpu, &resctrl_group_default.cpu_mask);
+
+	/* Update CPU mpam sysregs' default setting when cdp enabled */
+	if (resctrl_cdp_enabled)
+		resctrl_cdp_update_cpus_state(&resctrl_group_default);
+
 	return 0;
 }
 
 void mpam_resctrl_clear_default_cpu(unsigned int cpu)
 {
-	/* The cpu is set in default rdtgroup after online. */
-	cpumask_clear_cpu(cpu, &resctrl_group_default.cpu_mask);
+	struct resctrl_group *rdtgrp;
+
+	list_for_each_entry(rdtgrp, &resctrl_all_groups, resctrl_group_list) {
+		/* The cpu is clear in associated rdtgroup after offline. */
+		cpumask_clear_cpu(cpu, &rdtgrp->cpu_mask);
+	}
 }
 
 bool is_resctrl_cdp_enabled(void)
diff --git a/fs/resctrlfs.c b/fs/resctrlfs.c
index b66969b95775bfedd18930451d9fde23e946a321..e1c996ff4e791e455c5f0598c61416007d4ab248 100644
--- a/fs/resctrlfs.c
+++ b/fs/resctrlfs.c
@@ -357,28 +357,6 @@ static int mkdir_mondata_all(struct kernfs_node *parent_kn,
 	return ret;
 }
 
-static void resctrl_cdp_update_cpus_state(struct resctrl_group *r)
-{
-	int cpu;
-
-	/*
-     * If cdp on, tasks in resctrl default group with closid=0
-	 * and rmid=0 don't know how to fill proper partid_i/pmg_i
-	 * and partid_d/pmg_d into MPAMx_ELx sysregs by mpam_sched_in()
-	 * called by __switch_to(), it's because current cpu's default
-	 * closid and rmid are also equal to 0 and to make the operation
-	 * modifying configuration passed. Update per cpu default closid
-	 * of none-zero value, call update_closid_rmid() to update each
-	 * cpu's mpam proper MPAMx_ELx sysregs for setting partid and
-	 * pmg when mounting resctrl sysfs, it looks like a practical
-	 * method.
-	 */
-	for_each_cpu(cpu, &r->cpu_mask)
-		per_cpu(pqr_state.default_closid, cpu) = ~0;
-
-	update_closid_rmid(&r->cpu_mask, NULL);
-}
-
 static int resctrl_get_tree(struct fs_context *fc)
 {
 	int ret;