How to build Risc-V architecture UEFI

[wjh-study]

Now I download the edk2 and edk2-platforms then I git submodule update --init successfully.
But,I want to build Risc-V architecture EFI that I can run in the Risc-V FPGA.
So,I want to know that what libraries are necessary for me such as PEI, DXE, opensbi.
I referred to Sifive U500 but it has too many library that i do not need.
I want to a clean UEFI that can boot in FPGA.May I ask if anyone can provide assistance

[vlsunil]

Hi @wjh-study : You can refer to https://github.com/tianocore/edk2-platforms/tree/master/Platform/Sophgo/SG2042_EVB_Board. There is another platform whose support is in-flight and not yet merged which needs https://edk2.groups.io/g/devel/message/110778 and https://edk2.groups.io/g/devel/message/110589. You can also look at https://github.com/tianocore/edk2/tree/master/OvmfPkg/RiscVVirt for reference virtual platform.

[vlsunil]

Please build opensbi from https://github.com/riscv-software-src/opensbi

[vlsunil]

What is the qemu version you are using? It should be 8.1 at the minimum as mentioned in the readme.

[wjh-study]

Hi vlsunil:I am very grateful for your help and I hope you have a very pleasant weekend.
Now,the qemu I used is "QEMU emulator version 8.1.90", and when I run the cmd, it shows "device requires 33554432 bytes, block backend provides 8388608 bytes" but I set the memory is "-m 40960"

[vlsunil]

Please follow step 1 in https://github.com/tianocore/edk2/tree/master/OvmfPkg/RiscVVirt#test.

[wjh-study]

Hi: Thanks for your help，I have run the edk2 with qemu successfully.