Add note about PTW (#553)

Fixes #552 --------- Signed-off-by: Tariq Kurd <[email protected]> Co-authored-by: Alexander Richardson <[email protected]>
riscv · Mar 5, 2025 · e668e35 · e668e35
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commit e668e35
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diff --git a/src/cheri-pte-ext.adoc b/src/cheri-pte-ext.adoc
@@ -26,6 +26,8 @@ NOTE: The description below assumes that {cheri_pte_ext_name} has been implement
 
 The minimum level of PTE support is to set CW to 1 in all PTEs intended for storing capabilities (i.e. private anonymous mappings) and leave <<sstatusreg_pte,sstatus>>.UCRG and CRG in all PTEs set to 0, which will allow capabilities with their tags set to be loaded and stored successfully.
 
+NOTE: Hardware initiated memory accesses from the page-table walker are not checked by a capability.
+
 [#cheri_pte_fault]
 === CHERI PTE page faults