µSTT

This repository contains the open-source code for our ICCD 2025 paper: µSTT: Microarchitecture Design for Speculative Taint Tracking.

Introduction

µSTT analyzes the hardware complexity of the state-of-the-art hardware-based Spectre mitigation, Speculative Taint Tracking (STT), and identifies two key challenges:

1. Logic delay in taint propagation
2. Area overhead from instruction delaying

To address these challenges, µSTT introduces two new mechanisms: Age Matrix and impede micro-op.

Source Code Overview

This repository comprises the following artifacts:

.
├── gem5: Impede Micro-op evaluation in Gem5.
└── rtl: Age Matrix evaluation in RTL.

Citation

If you use this repository in your work, please cite:

@inproceedings{chen2025ustt,
    title={µSTT: Microarchitecture Design for Speculative Taint Tracking},
    author={Boru Chen and Rutvik Choudhary and Kaustubh Khulbe and Archie Lee and Adam Morrison and Christopher W. Fletcher},
    booktitle={2025 IEEE 43rd International Conference on Computer Design (ICCD)},
    year={2025}
}