Saravanan D 8b31602650 pci: vfio: Add unit tests for migration state machine ...

The VFIO save and load paths drive the kernel migration state machine
through a strict transition sequence and must recover correctly when a
transition or the data transfer fails. Validating that on real hardware
needs a migratable device, which CI does not have, so the behavior would
otherwise go unverified until it breaks in the field.

Introduce a mock Vfio wrapper that records state transitions and keeps
the migration blob in memory, then test VfioCommon save and load against
it. This pins the transition ordering, the data round trip, and the
failure recovery in CI on any host, independent of hardware. The trait
defaults and the VfioMigrationState conversions are covered too, so a
non migratable device and an unknown state value stay well defined. A
restore that carries migration state onto a device without migration
support is checked to fail instead of dropping the state.

A shadow sync test guards the related save path change, confirming a non
BAR config write reaches the PciConfiguration shadow so a snapshot
captures the live value instead of the post init zero.

Signed-off-by: Saravanan D <saravanand@crusoe.ai>

2026-07-02 01:13:03 +00:00

..

src

pci: vfio: Add unit tests for migration state machine

2026-07-02 01:13:03 +00:00

Cargo.toml

pci: vfio: Implement save path state transitions

2026-07-02 01:13:03 +00:00