Hi

The pre-condition to access pre-launched vm: there is serial port on your board.

The function should be ok for RTVM using ubuntu rootfs; but RT performance may be impacted by some services of ubuntu OS.

You can refer following xml:

https://github.com/projectacrn/acrn-hypervisor/blob/release_2.6/misc/config_tools/data/whl-ipc-i5/hybrid_rt.xml#L117-L120

    <pci_devs>

        <pci_dev>00:17.0 SATA controller: Intel Corporation Device 9dd3 (rev 30)</pci_dev>

        <pci_dev>03:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)</pci_dev>

    </pci_devs>

Please update the bdf info to match your setup.

BR.

Fuzhong