The Migratable trait groups all expected capabilities of devices and
components that can be migrated.
For a component to be migrated, it must be able to pause and resume.
Once paused, it should be able to provide a snapshot of itself. It
should also be able to restore itself from a snaphot.
As a consequence, the Migratable trait will be split between the
Pausable and the Snapshotable traits. This commit only adds the
Pausable one.
All migratable devices will be tracked from the DeviceManager.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The new crate vm-device is created here to host the definitions of
traits not meant to be tied to virtio of VFIO specifically. We need to
add a new trait to update external DMA mappings for devices, which is
why the vm-device crate is the right fit for this.
We can expect this crate to be extended later once the design gets
approved from a rust-vmm perspective.
In this specific use case, we can have some devices like VFIO or
vhost-user ones requiring to be notified about mapping updates. This
new trait ExternalDmaMapping will allow such devices to implement their
own way to handle such event.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
