Crate vm_control

Handles IPC for controlling the main VM process.

The VM Control IPC protocol is synchronous, meaning that each VmRequest sent over a connection will receive a VmResponse for that request next time data is received over that connection.

The wire message format is a little-endian C-struct of fixed size, along with a file descriptor if the request type expects one.

Re-exports

• pub use sys::FsMappingRequest;
• pub use sys::VmMemoryMappingRequest;
• pub use sys::VmMemoryMappingResponse;
• pub use crate::gdb::VcpuDebug;
• pub use crate::gdb::VcpuDebugStatus;
• pub use crate::gdb::VcpuDebugStatusMessage;

Modules

• api
  vm_control API client for use within crosvm
• balloon_tube 🔒
  Balloon related control APIs.
• client
• gdb
• gpu
• snapshot_format 🔒
• sys

Structs

• BalloonTube
  Utility for multiplexing a balloon tube between multiple control tubes. Commands are sent and processed serially.
• BatControl
  Used for VM to control battery properties.
• DeviceSleepGuard
  A guard to guarantee that all devices are sleeping during its scope.
• HotPlugDeviceInfo
• IoEventUpdateRequest
  Request to register or unregister an ioevent.
• RutabagaMemoryRegion 🔒
• SnapshotReader
  Reads snapshots created by SnapshotWriter.
• SnapshotWriter
  Writer of serialized VM snapshots.
• UsbControlAttachedDevice
• VcpuRestoreRequest
  Request to restore a Vcpu from a given snapshot, and report the results back via the provided channel.
• VcpuSuspendGuard
  A guard to guarantee that all the vCPUs are suspended during the scope.
• VmMappedMemoryRegion
• VmMemoryFileMapping
  Request to mmap a file to a shared memory. This request is supposed to follow a VmMemoryRequest::MmapAndRegisterMemory request that contains SharedMemory that file is mmaped to.
• VmMemoryRegionId
  Identifer for registered memory regions. Globally unique.
• VmMemoryRegionState
• VmMemoryRequestIommuClient
  Struct for managing VmMemoryRequests IOMMU related state.

Enums

• BalloonControlCommand
• BatControlCommand
• BatControlResult
• BatHealth
• BatProperty
• BatStatus
• BatteryType
• DeviceControlCommand
  Commands for actions on devices and the devices control thread.
• DevicesState
• DiskControlCommand
• DiskControlResult
• GpuSendToMain
• GpuSendToService
• HotPlugDeviceType
• IrqHandlerRequest
  Commands to control the IRQ handler thread.
• IrqHandlerResponse
  Response for IrqHandlerRequest.
• IrqSetup
  Data to set up an IRQ event or IRQ route on the IRQ chip. VmIrqRequest::execute can’t take an IrqChip argument, because of a dependency cycle between devices and vm_control, so it takes a Fn that processes an IrqSetup.
• ModifyWaitContext
  Enum that allows remote control of a wait context (used between the Windows GpuDisplay & the GPU worker).
• NetControlCommand
  Net control commands for adding and removing tap devices.
• PciControlResult
  Result for hotplug and removal of PCI device.
• PvClockCommand
  Message for communicating a suspend or resume to the virtio-pvclock device.
• PvClockCommandResponse
  Message used by virtio-pvclock to communicate command results.
• RegisteredEvent
  NOTE: when making any changes to this enum please also update RegisteredEventFfi in crosvm_control/src/lib.rs
• RegisteredEventWithData
• RegisteredMemory 🔒
• ServiceSendToGpu
• SnapshotCommand
  Commands for snapshot feature
• SwapCommand
  Commands for vmm-swap feature
• UsbControlCommand
• UsbControlResult
• VcpuControl
  Control the state of a particular VM CPU.
• VirtioIOMMURequest
  A request to the virtio-iommu process to perform some operations.
• VirtioIOMMUResponse
  Indication of success or failure of a VirtioIOMMURequest.
• VirtioIOMMUVfioCommand
• VirtioIOMMUVfioError
• VirtioIOMMUVfioResult
• VmIrqRequest
• VmIrqResponse
• VmMemoryDestination
  Destination of a VmMemoryRequest::RegisterMemory mapping in guest address space.
• VmMemoryRequest
• VmMemoryResponse
• VmMemorySource
  Source of a VmMemoryRequest::RegisterMemory mapping.
• VmRequest
  A request to the main process to perform some operation on the VM.
• VmResponse
  Indication of success or failure of a VmRequest.
• VmRunMode
  Mode of execution for the VM.

Constants

• EXPECTED_MAX_IRQ_FLUSH_ITERATIONS 🔒
• USB_CONTROL_MAX_PORTS
  The maximum number of devices that can be listed in one UsbControlCommand.

Traits

• GpeNotify
• PmResource
• PmeNotify

Functions

• do_restore
  Restore the VM to the snapshot at restore_path.
• do_snapshot 🔒
  Snapshot the VM to file at snapshot_path
• get_vcpu_state 🔒
• handle_disk_command
• map_descriptor 🔒
  WARNING: descriptor must be a mapping handle on Windows.
• to_rutabaga_desciptor 🔒
• try_map_to_prepared_region 🔒
• virtio_iommu_request
  Send VirtioIOMMURequest and wait to get the response
• virtio_iommu_request_async
  Send VirtioIOMMURequest without waiting for the response

Type Aliases

• MemSlot
  An index in the list of guest-mapped memory regions.
• VirtioIOMMURequestResult