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Clarify CMO operations under MTE (#6) #28

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Clarify CMO operations under MTE (#6) #28

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7 changes: 7 additions & 0 deletions src/mte_tag.adoc
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Expand Up @@ -315,6 +315,13 @@ can choose to enable on per-page basis. Furthermore, this allows software to
enable memory tagging only for heap.
====

[NOTE]
====
Cache Management Operations (CMOs) must respect and take into account memory tagging extension. Otherwise, serious security problems can appear, including:

* CBO.ZERO may work as a STORE operation. If memory tagging is not respected, it would be possible to write to memory bypassing the tag enforcement.
====

[[TAGCHECK_ELIDE]]
=== Per-pointer tag check elision

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