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-rw-r--r--docs/system/arm/emulation.rst1
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index b12f013b4f..4e8aca8b5d 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -89,6 +89,7 @@ the following architecture extensions:
 - FEAT_LRCPC2 (Load-acquire RCpc instructions v2)
 - FEAT_LSE (Large System Extensions)
 - FEAT_LSE2 (Large System Extensions v2)
+- FEAT_LSE128 (128-bit Atomics)
 - FEAT_LVA (Large Virtual Address space)
 - FEAT_MixedEnd (Mixed-endian support)
 - FEAT_MixedEndEL0 (Mixed-endian support at EL0)