riscv64gc-unknown-efi target

Problem you are trying to solve

With the advent of uefi-rs, it is now possible to write UEFI applications in Rust. There are already targets for rustup targeting i686, x86_64, and Aarch64, however there are none targeting RISC-V. I understand that RISC-V is a young platform, and as a result, UEFI on RISC-V is still in its infant stages. That being said, there are already RISC-V boards shipping with UEFI, and it would be nice to have a rustup-native target for RISC-V UEFI.

Solution you'd like

It would be nice to have a RISC-V target for UEFI included in rustup so that way a user can add the target without having to roll their own.

Notes

I have attempted to roll my own RISC-V UEFI target which can be found here. It includes my compilation process with the custom target. I have yet to get a working OVMF on QEMU for RISC-V and I do not have any development boards yet (although I will most likely acquire one.) That is to say that my target compiles, but is currently untested.

Start with the existing i686, x86_64, and AArch64 UEFI targets, then review the custom target and compilation process in the linked rustup-riscv64gc-unknown-uefi repository. Confirm the target builds and is tested on a RISC-V UEFI environment before integrating it as a rustup-native target.