Index: sys/dev/fdt/dwc3_fdt.c
===================================================================
RCS file: /cvsroot/src/sys/dev/fdt/dwc3_fdt.c,v
retrieving revision 1.7
diff -p -u -r1.7 dwc3_fdt.c
--- sys/dev/fdt/dwc3_fdt.c	19 Apr 2019 19:05:56 -0000	1.7
+++ sys/dev/fdt/dwc3_fdt.c	9 May 2019 07:58:49 -0000
@@ -35,6 +35,10 @@ __KERNEL_RCSID(0, "$NetBSD: dwc3_fdt.c,v
 #include <sys/intr.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
+#ifdef MULTIPROCESSOR
+#include <sys/interrupt.h>
+#include <sys/kcpuset.h>
+#endif
 
 #include <dev/usb/usb.h>
 #include <dev/usb/usbdi.h>
@@ -294,6 +298,19 @@ dwc3_fdt_attach(device_t parent, device_
 		    intrstr);
 		return;
 	}
+#ifdef MULTIPROCESSOR
+	/* Force DWC3 interrupts to CPU0 */
+	kcpuset_t *new;
+
+	kcpuset_create(&new, true);
+	kcpuset_set(new, 0);
+
+	error = interrupt_distribute(ih, new, NULL);
+	if (error)
+		aprint_error_dev(self, "force interrupts to CPU 0: %d\n",
+		    error);
+	kcpuset_destroy(new);
+#endif
 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
 
 	sc->sc_bus.ub_revision = USBREV_3_0;