Struct MmioTransport 

pub struct MmioTransport {
    pub is_vhost_user: bool,
    /* private fields */
}

Implements the MMIO transport for virtio devices.

This requires 3 points of installation to work with a VM:

1. Mmio reads and writes must be sent to this device at what is referred to here as MMIO base.
2. Mmio::queue_evts must be installed at virtio::NOTIFY_REG_OFFSET offset from the MMIO base. Each event in the array must be signaled if the index is written at that offset.
3. Mmio::interrupt_evt must signal an interrupt that the guest driver is listening to when it is written to.

Typically one page (4096 bytes) of MMIO address space is sufficient to handle this transport and inner virtio device.

Fields

is_vhost_user: bool

Implementations

impl MmioTransport

pub fn new( mem: GuestMemoryMmap, interrupt: Arc<IrqTrigger>, device: Arc<Mutex<dyn VirtioDevice>>, is_vhost_user: bool, ) -> MmioTransport

Constructs a new MMIO transport for the given virtio device.

pub fn locked_device(&self) -> MutexGuard<'_, dyn VirtioDevice + 'static>

Gets the encapsulated locked VirtioDevice.

pub fn device(&self) -> Arc<Mutex<dyn VirtioDevice>>

Gets the encapsulated VirtioDevice.

Trait Implementations

impl BusDevice for MmioTransport

fn read(&mut self, base: u64, offset: u64, data: &mut [u8])

Reads at offset from this device

fn write(&mut self, base: u64, offset: u64, data: &[u8]) -> Option<Arc<Barrier>>

Writes at offset into this device

impl Clone for MmioTransport

fn clone(&self) -> MmioTransport

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MmioTransport

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

Formats the value using the given formatter.

impl Persist<'_> for MmioTransport

type State = MmioTransportState

The type of the object representing the state of the component.

type ConstructorArgs = MmioTransportConstructorArgs

The type of the object holding the constructor arguments.

type Error = ()

The type of the error that can occur while constructing the object.

fn save(&self) -> Self::State

Returns the current state of the component.

fn restore( constructor_args: Self::ConstructorArgs, state: &Self::State, ) -> Result<Self, Self::Error>

Constructs a component from a specified state.