GKI and recovery-as-boot support (finally)#48
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…-ramdisk The script will look for /ramdisk-recovery.img in the root of ramdisk and assume device is A/B if it exists. Then, if bootloader does not put "skip_initramfs" or "androidboot.force_normal_boot=1" in cmdline, it triggers boot into recovery. Cherry-picked from Volla Phone 22 [1] with dropped unnecessary /sbin/init creation that also breaks creating the usual symlink and avoiding extra cat -> gzip pipeline. [1] https://gitlab.com/ubports/porting/reference-device-ports/android11/volla-phone-22/volla-mimameid/-/commit/882ee97b)
To be still tested on eMMC devices as well, works with UFS.
Various kernel features aren't built-in anymore and their modules are split to vendor_boot ramdisk fragment concatenated on runtime into our halium initrd. Cherry-picked from Volla Phone X23 [1] [1] https://gitlab.com/ubports/porting/reference-device-ports/halium12/volla-x23/volla-vidofnir/-/commit/b311b797
This is needed on Android 12+ (GKI 2.0) devices where androidboot values were moved to bootconfig and are no longer present on kernel cmdline.
GKI devices for example may require reboot-mode from modules.load.recovery etc.
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Stuff like this has been overlayed across most newer Ubuntu Touch ports at this point (e.g. https://gitlab.com/ubports/porting/reference-device-ports/halium12/volla-x23/volla-vidofnir/-/commits/main/ramdisk-overlay), I think it's time to bring the relevant bits back upstream here so we can stop vendoring things so much at long last which also should ease the LVM enablement steps where relevant.
Drafting for now to check if we need anything more still here.