We would like inform the you that we will be doing a talk at the KVM Forum next week on QEMU for Qualcomm Hexagon.  Alessandro Di Federico, Niccolo Izzo, and I have been working independently on implementations of the Hexagon target.  We plan to merge the implementations, have a community review, and ultimately have Hexagon be an official target in QEMU.  Our code is available at the links below.
https://github.com/revng/qemu-hexagon
https://github.com/quic/qemu
If anyone has any feedback on the code as it stands today or guidance on how best to prepare it for review, please let us know.

Thanks,
Taylor