| commit | c90e0c58a98990c1fc667f558c05db6367d5cc37 | [log] [tgz] |
|---|---|---|
| author | Pirmin Vogel <vogelpi@lowrisc.org> | Thu Jan 07 18:50:41 2021 +0100 |
| committer | Pirmin Vogel <vogelpi@lowrisc.org> | Fri Jan 15 08:15:11 2021 +0100 |
| tree | 7614a04824fb99cd98f180eb7612808e244bba3d | |
| parent | 55a7c94af1dabd051436d309f88b08e4076be11c [diff] |
[aes] Use sparse encodings for FSMs, trigger alert for invalid states This commit changes all FSMs inside AES to use sparse state encodings with a minimum Hamming distance of 3 between states. If any FSM enters an invalid state, the AES unit locks and an alert is triggered. The cipher core is prevented from finishing the current operation or starting a new operation. Writes to the control register are ignored. The AES unit needs to be reset. This commit also renames the alert signals. Update errors in the shadow control register are collected in `recoverable`. More severe errors such as storage errors in the shadow control register, entering invalid FSM states trigger a `fatal` alert. Signed-off-by: Pirmin Vogel <vogelpi@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.
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