Hi @beyolf:

Thanks for your explanation, but i have some questions about the stand alone kernel method:
1.I have a similar request, Now I have a android 10 device with its whole official code(kernel, vendor, system....etc) which use same CPU as Redmi note 9 pro, i mean , it use QCT 6250/7125..but i not found the my device name under https://gitlab.com/ubports/porting/community-ports.
I think the best match device is Redmi note 9 pro...

2.I have just merged the Halium kernel patch to my kernel source code, then rebuild the boot image.
However, i don't know what i should do next,as the porting guide steps, I should download the halium ramdisk, halium gsi, and UBPorts rootfs with the scripts from https://mirrors.lolinet.com/firmware/halium/GSI/ubports_GSI_installer_v10.zip.
But it seems not work for me.

I don't know what should i do next now....