Currently, QEMU unit tests use in-band execution for all QMP commands. However, in real use, some commands require the use of out-of-band execution to work properly as the main thread might be blocked during some operations. Furthermore, out-of-band execution might also be required for some future tests.

Acceptance criteria

• QEMU tests support out-of-band execution of QMP commands
• QEMU tests use out-of-band execution for QMP commands where this might be required in real use cases