Zenithal

Open Source

TUNA/BFSU Open Source Mirrors October 2020 - July 2023: Operator mirrors.tuna.tsinghua.edu.cn

CERNET Union Mirrors January 2022 - July 2023: Founder mirrors.cernet.edu.cn; [Slides]

OpenSSL linux-riscv platform First commit in May 2022, Role from April 2024: Nominated Community Member

Rocket Chip February 2023 - July 2023: Maintainer chipsalliance/rocket-chip; [Slides]CCC'22

CanoKey December 2020 - July 2023

Developer canokeys.org

Core: NDEF, OpenPGP touch policy, FIDO2 Ed25519 support (for ssh ed25519-sk)
Crypto: hardware-accelerated RSA3072
Virtual Card: QEMU, USB/IP, FunctionFS

Hardware Cryptographic Accelerator: Configurable RTL for Montgomery modular multiplication
Specialized Cryptography library: RSA2048/4096/Ed25519 software library using the above accelerator, implemented RSA4096 in a special way
USB 1.1 Peripheral: USB 1.1 PHY, Controller and driver, familiar with embedded USB stack

Linux, LLVM/MLIR, OpenSSH, chisel, archriscv-packages, nixpkgs, etc.: Contributor

Chisel And Additional Technology November 2021 - April 2023

Senior Intern, Mentored by Jiuyang Liu (@sequencer), PLCT, Institute of Software, Chinese Academy of Science

Rocket-Chip: See Undergraduate Thesis above; at the same time, RTL bug fix and DevOps part like QA, fixing CI and build tools. Later, assisted designing scalar-vector core interface. Then as GSoC mentor on Zc extention RTL implementation
OpenRigil: See Open Source section
Linux: Patch to linux-riscv on Zk/Zb support
OpenSSL: See Undergraduate Thesis above; also a library of Montgomery Modular Multiplication implemented in RISC-V Vector Extension assembly and a demo of RSA4096 based on the library
FPGA: Ported Rocket-Chip to Sipeed/TangPrimer-20K
Software-emulated Hypervisor Extension: Ported OpenSBI-H for SOPHON SG2042, possibly found a KVM bug for linux-riscv
Other commits to: chisel, riscv-isa-manual, riscv-bitmanip, riscv-plic-spec, riscv-tests, riscv-opcodes, riscv-pk, qemu/target/riscv, NixOS/nixpkgs/mill, riscv-boom, berkeley-hardfloat

Arch Linux RISC-V September 2021 - January 2022

Intern, Mentored by Felix Yan (@felixonmars), PLCT, Institute of Software, Chinese Academy of Science

Find proper config for Linux: No longer dependent on "dirty" vendor kernel of HiFive Unmatched

Big Data in Experimental Physics Summer 2020: Taught by Benda XU, Department of Engineering Physics, Tsinghua University; Designed daily assignment on Bash script, useful commands (pastebin, sed, oneliner), Makefile, Python (Numpy，HDF5, Matplotlib), R, SQL, picked interesting topic like Grover's algorithm and Accretion disk