The source is 10 years old. Is there a more recent approach? (e.g. Amazon FPGA instances.)
ZUMA: An Open FPGA Overlay Architecture - https://www.cse.wustl.edu/~roger/565M.f12/4699a093.pdf
To run an FPGA on an FPGA.
https://github.com/efabless/clear https://news.ycombinator.com/item?id=30437021