Merge tag 'ntb-5.11' of git://github.com/jonmason/ntb

[linux-2.6-microblaze.git] / Documentation / ABI / testing / sysfs-kernel-iommu_groups

diff --git a/Documentation/ABI/testing/sysfs-kernel-iommu_groups b/Documentation/ABI/testing/sysfs-kernel-iommu_groups
index 407b162..0fedbb0 100644 (file)
--- a/Documentation/ABI/testing/sysfs-kernel-iommu_groups
+++ b/Documentation/ABI/testing/sysfs-kernel-iommu_groups
@@ -40,23 +40,24 @@ KernelVersion:      v5.11
 Contact:       Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
 Description:   /sys/kernel/iommu_groups/<grp_id>/type shows the type of default
                domain in use by iommu for this group. See include/linux/iommu.h
-               for possible values. A privileged user could request kernel to
-               change the group type by writing to this file. Presently, only
-               three types of request are supported:
-               1. DMA: All the DMA transactions from the device in this group
-                       are translated by the iommu.
-               2. identity: All the DMA transactions from the device in this
-                            group are *not* translated by the iommu.
-               3. auto: Change to the type the device was booted with.
-               Note:
-               -----
+               for possible read values. A privileged user could request kernel to
+               change the group type by writing to this file. Valid write values:
+
+               ========  ======================================================
+               DMA       All the DMA transactions from the device in this group
+                         are translated by the iommu.
+               identity  All the DMA transactions from the device in this group
+                         are not translated by the iommu.
+               auto      Change to the type the device was booted with.
+               ========  ======================================================
+
                The default domain type of a group may be modified only when
-               1. The group has *only* one device
-               2. The device in the group is not bound to any device driver.
-                  So, the users must unbind the appropriate driver before
-                  changing the default domain type.
-               Caution:
-               --------
+
+               - The group has only one device.
+               - The device in the group is not bound to any device driver.
+                 So, the users must unbind the appropriate driver before
+                 changing the default domain type.
+
                Unbinding a device driver will take away the driver's control
                over the device and if done on devices that host root file
                system could lead to catastrophic effects (the users might