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authorMika Westerberg <mika.westerberg@linux.intel.com>2017-12-08 14:11:39 +0300
committerMika Westerberg <mika.westerberg@linux.intel.com>2018-03-09 12:54:11 +0300
commit6fc14e1a44e53c472865252b47398346a27d600e (patch)
tree2ddc11cdf4f12749618fc06dc4969a5157fac6eb /Documentation/ABI
parent9aaa3b8b4c56d24210acef37b7c800ca218c3d40 (diff)
downloadlinux-6fc14e1a44e53c472865252b47398346a27d600e.tar.xz
thunderbolt: Introduce USB only (SL4) security level
This new security level works so that it creates one PCIe tunnel to the connected Thunderbolt dock, removing PCIe links downstream of the dock. This leaves only the internal USB controller visible. Display Port tunnels are created normally. While there make sure security sysfs attribute returns "unknown" for any future security level. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Diffstat (limited to 'Documentation/ABI')
-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