Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:		/sys/kernel/iommu_groups/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:		May 2012
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) KernelVersion:	v3.5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Contact:	Alex Williamson <alex.williamson@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) Description:	/sys/kernel/iommu_groups/ contains a number of sub-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 		directories, each representing an IOMMU group.  The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 		name of the sub-directory matches the iommu_group_id()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 		for the group, which is an integer value.  Within each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 		subdirectory is another directory named "devices" with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 		links to the sysfs devices contained in this group.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 		The group directory also optionally contains a "name"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 		file if the IOMMU driver has chosen to register a more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		common name for the group.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) Users:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) What:		/sys/kernel/iommu_groups/reserved_regions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) Date: 		January 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) KernelVersion:  v4.11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) Contact: 	Eric Auger <eric.auger@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Description:    /sys/kernel/iommu_groups/reserved_regions list IOVA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		regions that are reserved. Not necessarily all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		reserved regions are listed. This is typically used to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		output direct-mapped, MSI, non mappable regions. Each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		region is described on a single line: the 1st field is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		the base IOVA, the second is the end IOVA and the third
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		field describes the type of the region.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) What:		/sys/kernel/iommu_groups/reserved_regions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) Date: 		June 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) KernelVersion:  v5.3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) Contact: 	Eric Auger <eric.auger@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) Description:    In case an RMRR is used only by graphics or USB devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		it is now exposed as "direct-relaxable" instead of "direct".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		In device assignment use case, for instance, those RMRR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		are considered to be relaxable and safe.