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-rw-r--r--Documentation/ABI/testing/sysfs-bus-thunderbolt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt
index 4ed229789852..151584a1f950 100644
--- a/Documentation/ABI/testing/sysfs-bus-thunderbolt
+++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt
@@ -35,6 +35,9 @@ Description: This attribute holds current Thunderbolt security level
minimum. User needs to authorize each device.
dponly: Automatically tunnel Display port (and USB). No
PCIe tunnels are created.
+ usbonly: Automatically tunnel USB controller of the
+ connected Thunderbolt dock (and Display Port). All
+ PCIe links downstream of the dock are removed.
What: /sys/bus/thunderbolt/devices/.../authorized
Date: Sep 2017
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