1 What: /sys/kernel/iommu_groups/
4 Contact: Alex Williamson <alex.williamson@redhat.com>
5 Description: /sys/kernel/iommu_groups/ contains a number of sub-
6 directories, each representing an IOMMU group. The
7 name of the sub-directory matches the iommu_group_id()
8 for the group, which is an integer value. Within each
9 subdirectory is another directory named "devices" with
10 links to the sysfs devices contained in this group.
11 The group directory also optionally contains a "name"
12 file if the IOMMU driver has chosen to register a more
13 common name for the group.
16 What: /sys/kernel/iommu_groups/reserved_regions
19 Contact: Eric Auger <eric.auger@redhat.com>
20 Description: /sys/kernel/iommu_groups/reserved_regions list IOVA
21 regions that are reserved. Not necessarily all
22 reserved regions are listed. This is typically used to
23 output direct-mapped, MSI, non mappable regions. Each
24 region is described on a single line: the 1st field is
25 the base IOVA, the second is the end IOVA and the third
26 field describes the type of the region.