[DEV] MultiROM WIP discussion [flounder][arm64] topic

I thought I'd post here my (and the people who helped me) progress on porting MultiROM to the HTC Nexus 9.

Contributors (so far, tell me if I miss anyone)

@joshuabg
@Bogdacutu for his port of MultiROM on the Shield Tablet (The arm stuff)
@USBhost for testing as well as helping with the patch (patch is still WIP, more on this later)
@Tasssadar for MultiROM all together
@Unjustified Dev for his influence

Progress
Working: Multirom TWRP has been successfully compiled for flounder and has working ADB and MTP.
Partially Working WIP: MultiROM boot selector source has been ported to work with arm64. The multirom boot selector compiles for flounder in zip format and launchees at device boot. However, touch does not work and there is no ADB at the moment.
Not Working WIP: The kexec hardboot patch currently does not work so the Nexus 9 is currently unable to boot another ROM other than the primary one.

Source
All sources can be found here (I know some of them may not work and may be a little messy but this is still a work in progress)
Device Tree
Kernel
MultiROM
MultiROM TWRP


Building Notes
I compile this with the CyanogenMod Device TreeInstructionsfor building multirom can be found on the multirom wiki found here
Note: adbd and kexec-tools need to be replaced with these versions that are arm64 compatible
adbd kexec-tools
If you would like to contact me on hangouts about this, please PM me your Gmail.