![Eric Auger](/assets/img/avatar_default.png)
A new iommu-group sysfs attribute file is introduced. It contains the list of reserved regions for the iommu-group. Each reserved region is described on a separate line: - first field is the start IOVA address, - second is the end IOVA address, - third is the type. Signed-off-by: Eric Auger <eric.auger@redhat.com> Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com> Tested-by: Bharat Bhushan <bharat.bhushan@nxp.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
27 lines
1.1 KiB
Plaintext
27 lines
1.1 KiB
Plaintext
What: /sys/kernel/iommu_groups/
|
|
Date: May 2012
|
|
KernelVersion: v3.5
|
|
Contact: Alex Williamson <alex.williamson@redhat.com>
|
|
Description: /sys/kernel/iommu_groups/ contains a number of sub-
|
|
directories, each representing an IOMMU group. The
|
|
name of the sub-directory matches the iommu_group_id()
|
|
for the group, which is an integer value. Within each
|
|
subdirectory is another directory named "devices" with
|
|
links to the sysfs devices contained in this group.
|
|
The group directory also optionally contains a "name"
|
|
file if the IOMMU driver has chosen to register a more
|
|
common name for the group.
|
|
Users:
|
|
|
|
What: /sys/kernel/iommu_groups/reserved_regions
|
|
Date: January 2017
|
|
KernelVersion: v4.11
|
|
Contact: Eric Auger <eric.auger@redhat.com>
|
|
Description: /sys/kernel/iommu_groups/reserved_regions list IOVA
|
|
regions that are reserved. Not necessarily all
|
|
reserved regions are listed. This is typically used to
|
|
output direct-mapped, MSI, non mappable regions. Each
|
|
region is described on a single line: the 1st field is
|
|
the base IOVA, the second is the end IOVA and the third
|
|
field describes the type of the region.
|