>Yes, if you're using LinuxBoot then you need to include all the drivers you wish to use in your LinuxBoot kernel, including SATA and USB.

>`localboot -grub` will systematically mount partitions looking for a GRUB config file, parse it, and kexec the kernel it finds. You can select a particular entry using the `-config` command-line parameter.

Finally I've been able to boot my system and implement a signature verification using TPM2.

It's very easy to try new things with linuxboot and u-root!

Thanks!

Jorge