| commit | 26788db73d095cff4e98e5ed03abb5215fbb3d08 | [log] [tgz] |
|---|---|---|
| author | Rupert Swarbrick <rswarbrick@lowrisc.org> | Fri Dec 10 11:12:13 2021 +0000 |
| committer | Rupert Swarbrick <rswarbrick@gmail.com> | Thu Dec 16 08:41:56 2021 +0000 |
| tree | f0da7ffa81b56293a9c8fcb228f162a9756e26d1 | |
| parent | 4b2aa6b7e6cad64aa591de7abb89370568a3da87 [diff] |
[rom_ctrl] Add an alert that spots glitches on the checker counter We don't care about glitches to the counter when we're still checking things (because exploiting one of them would need a pre-image attack on SHA3!), but we might care about the counter changing when we're in the Done state. Theoretically, it doesn't matter what the counter address is in this state, but if someone manages to subvert the mux they might be able to use it to generate a bogus address to respond to a TL access. However, if they do that then we'll see a negedge of counter_done on the following cycle and can raise an alert. Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or “monorepo”, where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.
The project contains comprehensive documentation of all IPs and tools. You can access it online at docs.opentitan.org.
Have a look at CONTRIBUTING and our documentation on project organization and processes for guidelines on how to contribute code to this repository.
Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).