diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index a1457995fd41c..d1edee0fd5ec3 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6964,6 +6964,13 @@
 			disables both lockup detectors. Default is 10
 			seconds.
 
+	workqueue.unbound_cpus=
+			[KNL,SMP] Specify to constrain one or some CPUs
+			to use in unbound workqueues.
+			Format: <cpu-list>
+			By default, all online CPUs are available for
+			unbound workqueues.
+
 	workqueue.watchdog_thresh=
 			If CONFIG_WQ_WATCHDOG is configured, workqueue can
 			warn stall conditions and dump internal state to
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index f8891552fdd6d..83f8993af57cf 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -368,6 +368,9 @@ static bool workqueue_freezing;		/* PL: have wqs started freezing? */
 /* PL&A: allowable cpus for unbound wqs and work items */
 static cpumask_var_t wq_unbound_cpumask;
 
+/* for further constrain wq_unbound_cpumask by cmdline parameter*/
+static struct cpumask wq_cmdline_cpumask __initdata;
+
 /* CPU where unbound work was last round robin scheduled from this CPU */
 static DEFINE_PER_CPU(int, wq_rr_cpu_last);
 
@@ -6455,6 +6458,9 @@ void __init workqueue_init_early(void)
 	cpumask_copy(wq_unbound_cpumask, housekeeping_cpumask(HK_TYPE_WQ));
 	cpumask_and(wq_unbound_cpumask, wq_unbound_cpumask, housekeeping_cpumask(HK_TYPE_DOMAIN));
 
+	if (!cpumask_empty(&wq_cmdline_cpumask))
+		cpumask_and(wq_unbound_cpumask, wq_unbound_cpumask, &wq_cmdline_cpumask);
+
 	pwq_cache = KMEM_CACHE(pool_workqueue, SLAB_PANIC);
 
 	/* initialize CPU pools */
@@ -6577,3 +6583,14 @@ void __warn_flushing_systemwide_wq(void)
 	dump_stack();
 }
 EXPORT_SYMBOL(__warn_flushing_systemwide_wq);
+
+static int __init workqueue_unbound_cpus_setup(char *str)
+{
+	if (cpulist_parse(str, &wq_cmdline_cpumask) < 0) {
+		cpumask_clear(&wq_cmdline_cpumask);
+		pr_warn("workqueue.unbound_cpus: incorrect CPU range, using default\n");
+	}
+
+	return 1;
+}
+__setup("workqueue.unbound_cpus=", workqueue_unbound_cpus_setup);