1d72e31c9SAlex WilliamsonWhat: /sys/kernel/iommu_groups/ 2d72e31c9SAlex WilliamsonDate: May 2012 3d72e31c9SAlex WilliamsonKernelVersion: v3.5 4d72e31c9SAlex WilliamsonContact: Alex Williamson <alex.williamson@redhat.com> 5d72e31c9SAlex WilliamsonDescription: /sys/kernel/iommu_groups/ contains a number of sub- 6d72e31c9SAlex Williamson directories, each representing an IOMMU group. The 7d72e31c9SAlex Williamson name of the sub-directory matches the iommu_group_id() 8d72e31c9SAlex Williamson for the group, which is an integer value. Within each 9d72e31c9SAlex Williamson subdirectory is another directory named "devices" with 10d72e31c9SAlex Williamson links to the sysfs devices contained in this group. 11d72e31c9SAlex Williamson The group directory also optionally contains a "name" 12d72e31c9SAlex Williamson file if the IOMMU driver has chosen to register a more 13d72e31c9SAlex Williamson common name for the group. 14d72e31c9SAlex WilliamsonUsers: 15*bc7d12b9SEric Auger 16*bc7d12b9SEric AugerWhat: /sys/kernel/iommu_groups/reserved_regions 17*bc7d12b9SEric AugerDate: January 2017 18*bc7d12b9SEric AugerKernelVersion: v4.11 19*bc7d12b9SEric AugerContact: Eric Auger <eric.auger@redhat.com> 20*bc7d12b9SEric AugerDescription: /sys/kernel/iommu_groups/reserved_regions list IOVA 21*bc7d12b9SEric Auger regions that are reserved. Not necessarily all 22*bc7d12b9SEric Auger reserved regions are listed. This is typically used to 23*bc7d12b9SEric Auger output direct-mapped, MSI, non mappable regions. Each 24*bc7d12b9SEric Auger region is described on a single line: the 1st field is 25*bc7d12b9SEric Auger the base IOVA, the second is the end IOVA and the third 26*bc7d12b9SEric Auger field describes the type of the region. 27