Struct devices::virtio::media::GuestMemoryShadowMapping

struct GuestMemoryShadowMapping {
    data: Vec<u8>,
    mem: GuestMemory,
    sgs: Vec<SgEntry>,
    dirty: bool,
}

Copy of sparse guest memory that is written back upon destruction.

Contrary to GuestMemoryMapping which re-maps guest memory to make it appear linear to the host, this copies the sparse guest memory into a linear vector that is copied back upon destruction. Doing so can be faster than a costly mapping operation if the guest area is small enough.

Fields

data: Vec<u8>

Sparse data copied from the guest.

mem: GuestMemory

Guest memory to read from.

sgs: Vec<SgEntry>

SG entries describing the sparse guest area.

dirty: bool

Whether the data has potentially been modified and requires to be written back to the guest.

Implementations

impl GuestMemoryShadowMapping

fn new(mem: &GuestMemory, sgs: Vec<SgEntry>) -> Result<Self>

Trait Implementations

impl Drop for GuestMemoryShadowMapping

Write the potentially modified shadow buffer back into the guest memory.

fn drop(&mut self)

Executes the destructor for this type.

impl GuestMemoryRange for GuestMemoryShadowMapping

fn as_ptr(&self) -> *const u8

fn as_mut_ptr(&mut self) -> *mut u8