Struct devices::virtio::Rng

pub struct Rng {
    worker_thread: Option<WorkerThread<Worker>>,
    virtio_features: u64,
}

Virtio device for exposing entropy to the guest OS through virtio.

Fields

worker_thread: Option<WorkerThread<Worker>>

virtio_features: u64

Implementations

impl Rng

pub fn new(virtio_features: u64) -> Result<Rng>

Create a new virtio rng device that gets random data from /dev/urandom.

Trait Implementations

impl VirtioDevice for Rng

fn keep_rds(&self) -> Vec<RawDescriptor>

A vector of device-specific file descriptors that must be kept open after jailing. Must be called before the process is jailed.

fn device_type(&self) -> DeviceType

The virtio device type.

fn queue_max_sizes(&self) -> &[u16]

The maximum size of each queue that this device supports.

fn features(&self) -> u64

The set of feature bits that this device supports in addition to the base features.

fn activate( &mut self, _mem: GuestMemory, interrupt: Interrupt, queues: BTreeMap<usize, Queue> ) -> Result<()>

Activates this device for real usage.

fn reset(&mut self) -> Result<()>

Optionally deactivates this device. If the reset method is not able to reset the virtio device, or the virtio device model doesn’t implement the reset method, an Err value is returned to indicate the reset is not successful. Otherwise Ok(()) should be returned.

fn virtio_sleep(&mut self) -> Result<Option<BTreeMap<usize, Queue>>>

Pause all processing.

fn virtio_wake( &mut self, queues_state: Option<(GuestMemory, Interrupt, BTreeMap<usize, Queue>)> ) -> Result<()>

Resume all processing.

fn virtio_snapshot(&mut self) -> Result<Value>

Snapshot current state. Device must be asleep.

fn virtio_restore(&mut self, data: Value) -> Result<()>

Restore device state from a snapshot. TODO(b/280607404): Vhost user will need fds passed to the device process.

fn debug_label(&self) -> String

Returns a label suitable for debug output.

fn num_interrupts(&self) -> usize

The number of interrupts used by this device.

fn ack_features(&mut self, value: u64)

Acknowledges that this set of features should be enabled.

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

Reads this device configuration space at offset.

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

Writes to this device configuration space at offset.

fn get_device_bars(&mut self, _address: PciAddress) -> Vec<PciBarConfiguration>

Returns any additional BAR configuration required by the device.

fn get_device_caps(&self) -> Vec<Box<dyn PciCapability>>

Returns any additional capabiltiies required by the device.

fn on_device_sandboxed(&mut self)

Invoked when the device is sandboxed.

fn control_notify(&self, _behavior: MsixStatus)

fn generate_acpi( &mut self, _pci_address: &Option<PciAddress>, sdts: Vec<SDT> ) -> Option<Vec<SDT>>

fn read_bar(&mut self, _bar_index: PciBarIndex, _offset: u64, _data: &mut [u8])

Reads from a BAR region mapped in to the device.

fn write_bar(&mut self, _bar_index: PciBarIndex, _offset: u64, _data: &[u8])

Writes to a BAR region mapped in to the device.

fn pci_address(&self) -> Option<PciAddress>

Returns the PCI address where the device will be allocated. Returns None if any address is good for the device.

fn transport_type(&self) -> VirtioTransportType

Returns the Virtio transport type: PCI (default for crosvm) or MMIO.

fn get_shared_memory_region(&self) -> Option<SharedMemoryRegion>

Returns the device’s shared memory region if present.

fn expose_shmem_descriptors_with_viommu(&self) -> bool

If true, VFIO passthrough devices can access descriptors mapped into this region by mapping the corresponding addresses from this device’s PCI bar into their IO address space with virtio-iommu.

fn set_shared_memory_mapper(&mut self, _mapper: Box<dyn SharedMemoryMapper>)

Provides the trait object used to map files into the device’s shared memory region.

fn set_shared_memory_region_base(&mut self, _addr: GuestAddress)

Provides the base address of the shared memory region, if one is present. Will be called before activate.

fn get_shared_memory_prepare_type(&mut self) -> SharedMemoryPrepareType

Queries the implementation whether a single prepared hypervisor memory mapping with explicit caching type should be setup lazily on first mapping request, or whether to dynamically setup a hypervisor mapping with every request’s caching type.

fn bootorder_fw_cfg(&self, _pci_address: u8) -> Option<(Vec<u8>, usize)>