Struct Iotlb 

pub struct Iotlb { /* private fields */ }

Available on crate feature iommu only.

Provides an IOTLB.

The IOTLB caches IOMMU mappings. It must be preemptively updated whenever mappings are restricted or removed; in contrast, adding mappings or making them more permissive does not require preemptive updates, as subsequent accesses that violate the previous (more restrictive) permissions will trigger TLB misses or access failures, which is then supposed to result in an update from the outer Iommu object that performs the translation.

Implementations

impl Iotlb

pub fn new() -> Self

Create a new empty instance.

pub fn set_mapping( &mut self, iova: GuestAddress, map_to: GuestAddress, length: usize, perm: Permissions, ) -> Result<(), Error>

Change the mapping of the given IOVA range.

pub fn invalidate_mapping(&mut self, iova: GuestAddress, length: usize)

Remove any mapping in the given IOVA range.

pub fn invalidate_all(&mut self)

Remove all mappings.

pub fn lookup<D: Deref<Target = Iotlb>>( this: D, iova: GuestAddress, length: usize, access: Permissions, ) -> Result<IotlbIterator<D>, IotlbFails>

Perform a lookup for the given range and the given access mode.

If the whole range is mapped and accessible, return an iterator over all mappings.

If any part of the range is not mapped or does not permit the given access mode, return an Err(_) that contains a list of all such subranges.

Trait Implementations

impl Debug for Iotlb

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Iotlb

fn default() -> Iotlb

Returns the “default value” for a type.