Use litex to define/build a riscv soc-on-fpga, boot qsoe instead of Linux on said fpga?

Thanks for the clarification! Till today I didn't know you can build a 64-bit RISC-V CPU with LiteX. Cool!

The only problem (for me) is the availability of suitable hardware to implement it :) The only FPGA board I got is GateMate EVB-A1.

Where are you based, I can get you something beefier?

I got a Tang Primer for one of my own projects recently.

Oh, don't worry (and thanks for the offer!) -- I'll soon have Artix 7 powered board (or may be even something "beefier"). At least the "Dragon Board" with Artix 7 I will need for the video controller for my Unmatched: it has a PCIe connector & HDMI connector.