diff --git a/drivers/thunderbolt/lc.c b/drivers/thunderbolt/lc.c
index 5c209a570360..44647fa1ec1c 100644
--- a/drivers/thunderbolt/lc.c
+++ b/drivers/thunderbolt/lc.c
@@ -104,6 +104,60 @@ void tb_lc_unconfigure_port(struct tb_port *port)
 	tb_lc_set_port_configured(port, false);
 }
 
+static int tb_lc_set_xdomain_configured(struct tb_port *port, bool configure)
+{
+	struct tb_switch *sw = port->sw;
+	u32 ctrl, lane;
+	int cap, ret;
+
+	if (sw->generation < 2)
+		return 0;
+
+	cap = find_port_lc_cap(port);
+	if (cap < 0)
+		return cap;
+
+	ret = tb_sw_read(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);
+	if (ret)
+		return ret;
+
+	/* Resolve correct lane */
+	if (port->port % 2)
+		lane = TB_LC_SX_CTRL_L1D;
+	else
+		lane = TB_LC_SX_CTRL_L2D;
+
+	if (configure)
+		ctrl |= lane;
+	else
+		ctrl &= ~lane;
+
+	return tb_sw_write(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);
+}
+
+/**
+ * tb_lc_configure_xdomain() - Inform LC that the link is XDomain
+ * @port: Switch downstream port connected to another host
+ *
+ * Sets the lane configured for XDomain accordingly so that the LC knows
+ * about this. Returns %0 in success and negative errno in failure.
+ */
+int tb_lc_configure_xdomain(struct tb_port *port)
+{
+	return tb_lc_set_xdomain_configured(port, true);
+}
+
+/**
+ * tb_lc_unconfigure_xdomain() - Unconfigure XDomain from port
+ * @port: Switch downstream port that was connected to another host
+ *
+ * Unsets the lane XDomain configuration.
+ */
+void tb_lc_unconfigure_xdomain(struct tb_port *port)
+{
+	tb_lc_set_xdomain_configured(port, false);
+}
+
 /**
  * tb_lc_set_sleep() - Inform LC that the switch is going to sleep
  * @sw: Switch to set sleep
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 54a4daf0b1b4..602e00e0b45e 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -140,6 +140,21 @@ static void tb_discover_tunnels(struct tb_switch *sw)
 	}
 }
 
+static int tb_port_configure_xdomain(struct tb_port *port)
+{
+	if (tb_switch_is_usb4(port->sw))
+		return usb4_port_configure_xdomain(port);
+	return tb_lc_configure_xdomain(port);
+}
+
+static void tb_port_unconfigure_xdomain(struct tb_port *port)
+{
+	if (tb_switch_is_usb4(port->sw))
+		usb4_port_unconfigure_xdomain(port);
+	else
+		tb_lc_unconfigure_xdomain(port);
+}
+
 static void tb_scan_xdomain(struct tb_port *port)
 {
 	struct tb_switch *sw = port->sw;
@@ -158,6 +173,7 @@ static void tb_scan_xdomain(struct tb_port *port)
 			      NULL);
 	if (xd) {
 		tb_port_at(route, sw)->xdomain = xd;
+		tb_port_configure_xdomain(port);
 		tb_xdomain_add(xd);
 	}
 }
@@ -566,6 +582,7 @@ static void tb_scan_port(struct tb_port *port)
 	 */
 	if (port->xdomain) {
 		tb_xdomain_remove(port->xdomain);
+		tb_port_unconfigure_xdomain(port);
 		port->xdomain = NULL;
 	}
 
@@ -1047,6 +1064,7 @@ static void tb_handle_hotplug(struct work_struct *work)
 	struct tb_cm *tcm = tb_priv(tb);
 	struct tb_switch *sw;
 	struct tb_port *port;
+
 	mutex_lock(&tb->lock);
 	if (!tcm->hotplug_active)
 		goto out; /* during init, suspend or shutdown */
@@ -1103,6 +1121,7 @@ static void tb_handle_hotplug(struct work_struct *work)
 			port->xdomain = NULL;
 			__tb_disconnect_xdomain_paths(tb, xd);
 			tb_xdomain_put(xd);
+			tb_port_unconfigure_xdomain(port);
 		} else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) {
 			tb_dp_resource_unavailable(tb, port);
 		} else {
@@ -1269,13 +1288,17 @@ static void tb_restore_children(struct tb_switch *sw)
 		tb_sw_warn(sw, "failed to restore TMU configuration\n");
 
 	tb_switch_for_each_port(sw, port) {
-		if (!tb_port_has_remote(port))
+		if (!tb_port_has_remote(port) && !port->xdomain)
 			continue;
 
-		tb_switch_lane_bonding_enable(port->remote->sw);
-		tb_switch_configure_link(port->remote->sw);
+		if (port->remote) {
+			tb_switch_lane_bonding_enable(port->remote->sw);
+			tb_switch_configure_link(port->remote->sw);
 
-		tb_restore_children(port->remote->sw);
+			tb_restore_children(port->remote->sw);
+		} else if (port->xdomain) {
+			tb_port_configure_xdomain(port);
+		}
 	}
 }
 
@@ -1321,6 +1344,7 @@ static int tb_free_unplugged_xdomains(struct tb_switch *sw)
 		if (port->xdomain && port->xdomain->is_unplugged) {
 			tb_retimer_remove_all(port);
 			tb_xdomain_remove(port->xdomain);
+			tb_port_unconfigure_xdomain(port);
 			port->xdomain = NULL;
 			ret++;
 		} else if (port->remote) {
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 0a0317e56043..c80b11dba756 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -848,6 +848,8 @@ int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
 int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid);
 int tb_lc_configure_port(struct tb_port *port);
 void tb_lc_unconfigure_port(struct tb_port *port);
+int tb_lc_configure_xdomain(struct tb_port *port);
+void tb_lc_unconfigure_xdomain(struct tb_port *port);
 int tb_lc_set_sleep(struct tb_switch *sw);
 bool tb_lc_lane_bonding_possible(struct tb_switch *sw);
 bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in);
@@ -921,6 +923,8 @@ struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
 int usb4_port_unlock(struct tb_port *port);
 int usb4_port_configure(struct tb_port *port);
 void usb4_port_unconfigure(struct tb_port *port);
+int usb4_port_configure_xdomain(struct tb_port *port);
+void usb4_port_unconfigure_xdomain(struct tb_port *port);
 int usb4_port_enumerate_retimers(struct tb_port *port);
 
 int usb4_port_retimer_read(struct tb_port *port, u8 index, u8 reg, void *buf,
diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h
index fd4fc144d17f..a553be24f1c0 100644
--- a/drivers/thunderbolt/tb_regs.h
+++ b/drivers/thunderbolt/tb_regs.h
@@ -303,6 +303,7 @@ struct tb_regs_port_header {
 #define PORT_CS_18_TCM				BIT(9)
 #define PORT_CS_19				0x13
 #define PORT_CS_19_PC				BIT(3)
+#define PORT_CS_19_PID				BIT(4)
 
 /* Display Port adapter registers */
 #define ADP_DP_CS_0				0x00
@@ -417,7 +418,9 @@ struct tb_regs_hop {
 
 #define TB_LC_SX_CTRL			0x96
 #define TB_LC_SX_CTRL_L1C		BIT(16)
+#define TB_LC_SX_CTRL_L1D		BIT(17)
 #define TB_LC_SX_CTRL_L2C		BIT(20)
+#define TB_LC_SX_CTRL_L2D		BIT(21)
 #define TB_LC_SX_CTRL_UPSTREAM		BIT(30)
 #define TB_LC_SX_CTRL_SLP		BIT(31)
 
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index b2677427789f..59b8b51d1fa4 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -785,6 +785,51 @@ void usb4_port_unconfigure(struct tb_port *port)
 	usb4_port_set_configured(port, false);
 }
 
+static int usb4_set_xdomain_configured(struct tb_port *port, bool configured)
+{
+	int ret;
+	u32 val;
+
+	if (!port->cap_usb4)
+		return -EINVAL;
+
+	ret = tb_port_read(port, &val, TB_CFG_PORT,
+			   port->cap_usb4 + PORT_CS_19, 1);
+	if (ret)
+		return ret;
+
+	if (configured)
+		val |= PORT_CS_19_PID;
+	else
+		val &= ~PORT_CS_19_PID;
+
+	return tb_port_write(port, &val, TB_CFG_PORT,
+			     port->cap_usb4 + PORT_CS_19, 1);
+}
+
+/**
+ * usb4_port_configure_xdomain() - Configure port for XDomain
+ * @port: USB4 port connected to another host
+ *
+ * Marks the USB4 port as being connected to another host. Returns %0 in
+ * success and negative errno in failure.
+ */
+int usb4_port_configure_xdomain(struct tb_port *port)
+{
+	return usb4_set_xdomain_configured(port, true);
+}
+
+/**
+ * usb4_port_unconfigure_xdomain() - Unconfigure port for XDomain
+ * @port: USB4 port that was connected to another host
+ *
+ * Clears USB4 port from being marked as XDomain.
+ */
+void usb4_port_unconfigure_xdomain(struct tb_port *port)
+{
+	usb4_set_xdomain_configured(port, false);
+}
+
 static int usb4_port_wait_for_bit(struct tb_port *port, u32 offset, u32 bit,
 				  u32 value, int timeout_msec)
 {