Struct devices::virtio::media::HostMemoryMapper

struct HostMemoryMapper<M: SharedMemoryMapper> {
    shm_mapper: M,
    allocator: AddressAllocator,
}

Provides the ability to map host memory into the guest physical address space. Used to implement VirtioMediaHostMemoryMapper.

Fields

shm_mapper: M

Mapper.

allocator: AddressAllocator

Address allocator for the mapper.

Trait Implementations

impl<M: SharedMemoryMapper> VirtioMediaHostMemoryMapper for HostMemoryMapper<M>

fn add_mapping( &mut self, buffer: BorrowedFd<'_>, length: u64, offset: u64, rw: bool, ) -> Result<u64, i32>

Maps length bytes of host memory starting at offset and backed by buffer into the guest’s shared memory region.

fn remove_mapping(&mut self, offset: u64) -> Result<(), i32>

Removes a guest mapping previously created at shared memory region offset shm_offset.