Simple rust uefi core firmware

This project is an experiment and should not be used production workloads.

Building

1. Install rust (https://www.rust-lang.org/)

2. Intall xbuild

cargo install cargo-xbuild

3. Compile the code

cargo xbuild --release --target target.json

4. The result will be in:

target/target/release/payload-efi

Running

1. check out https://github.com/jyao1/edk2/tree/minovmf

2. build MinOvmf64FwPkg.

   build -p MinOvmf64FwPkg\MinOvmf64FwPkg.dsc -a IA32 -a X64 -t VS2015x86

The image is Build\MinOvmf64Fw\DEBUG_VS2015x86\fv\OVMF64Fw.fd.

3. install qemu (https://www.qemu.org/)

4. download image. (https://download.clearlinux.org/releases/28660/clear/clear-28660-kvm.img.xz)

5. run qemu

qemu-system-x86_64.exe -machine q35,smm=on -smp 4 -serial mon:stdio -drive if=pflash,format=raw,unit=0,file=OVMF64Fw.fd -drive if=none,id=virtio-disk0,file=clear-29160-kvm.img -device virtio-blk-pci,drive=virtio-disk0,disable-legacy=on,disable-modern=off

6. Then a uefi shell command prompt is shown in the command window. It supports some simple commands.

Boot Flow

The payload-efi can be treated as a UEFI payload.

The EDKII SEC loads payload-efi as UEFI core.

Then the payload-efi loads the EDKII UEFI shell.

TODO

• implement more feature required by UEFI specification.
• remove the EDKII SEC dependency.