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optionally simplify lm_perm #387

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merged 4 commits into from
Oct 2, 2024
Merged

optionally simplify lm_perm #387

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0ca14f9
optionally simplify lm_perm
tariqkurd-repo Oct 1, 2024
78c3afe
improve the text
tariqkurd-repo Oct 1, 2024
5967090
simplify wording
tariqkurd-repo Oct 1, 2024
3128d4f
Update src/cap-description.adoc
tariqkurd-repo Oct 1, 2024
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2 changes: 2 additions & 0 deletions src/cap-description.adoc
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Expand Up @@ -137,6 +137,8 @@ If a capability grants <<r_perm>> and <<c_perm>>, but no <<lm_perm>>, then a cap
The rules specified by <<ACPERM>> are followed when <<w_perm>> and <<lm_perm>> are removed, so additional permissions may also be removed.
Clearing a capability's <<lm_perm>> and <<w_perm>> allows sharing a read-only version of a data structure (e.g. a tree or linked list) without making a copy.

NOTE: Implementations are allowed to retain invalid capability permissions loaded from memory instead of following the <<ACPERM>> behaviour of reducing them to _no permissions_.

[#asr_perm,reftext="ASR-permission"]
Access System Registers Permission (ASR):: Allow read and write access to all
privileged (M-mode and S-mode) CSRs.
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