attempt at listing some system rules with examples #401
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arichardson
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Oct 3, 2024
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| . Update any data bytes without also writing the tag | ||
| .. This implies clearing the tag if a non-CHERI aware bus master overwrites a capability in memory | ||
| . Set the tag without also writing the data. |
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| . Set the tag without also writing the data. | |
| . Read a tagged value with mismatched (stale or newer) data | |
| . Set the tag without also writing the data. |
This is implicit in the "accessed atomically" but might be worth calling out explicitly?
arichardson
reviewed
Oct 3, 2024
| . Update any data bytes without also writing the tag | ||
| .. This implies clearing the tag if a non-CHERI aware bus master overwrites a capability in memory | ||
| . Set the tag without also writing the data. | ||
| .. Clearing tags in memory does not require updating the data |
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Maybe this works better as a note?
Suggested change
| .. Clearing tags in memory does not require updating the data | |
| NOTE: Clearing tags in memory does not necessarily require updating the associated data. |
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Something which came up in RVI discussions is how to build CHERI systems, so this section adds some system guidelines.