Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

[sfrench/cifs-2.6.git] / Documentation / ABI / testing / sysfs-bus-thunderbolt

diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt
index 151584a1f9504d5fb00dc8c6190a0aa479ad2287..b21fba14689bac8840d9d2fe7e1755dd857e498b 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-thunderbolt
+++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt
@@ -21,6 +21,15 @@ Description: Holds a comma separated list of device unique_ids that
                If a device is authorized automatically during boot its
                boot attribute is set to 1.
 
+What: /sys/bus/thunderbolt/devices/.../domainX/iommu_dma_protection
+Date:          Mar 2019
+KernelVersion: 4.21
+Contact:       thunderbolt-software@lists.01.org
+Description:   This attribute tells whether the system uses IOMMU
+               for DMA protection. Value of 1 means IOMMU is used 0 means
+               it is not (DMA protection is solely based on Thunderbolt
+               security levels).
+
 What: /sys/bus/thunderbolt/devices/.../domainX/security
 Date:          Sep 2017
 KernelVersion: 4.13