diff --git a/extensions/rv_zvbc b/extensions/rv_zvbc
index 95bf4317..4f9ec2b8 100644
--- a/extensions/rv_zvbc
+++ b/extensions/rv_zvbc
@@ -1,4 +1,4 @@
-# Zvbc - Vector Carryless Multiplication
+# Zvbc/Zvbce32 - Vector Carryless Multiplication
 
 # Carryless Multiply
 vclmul.vv    31..26=0x0C         vm vs2 vs1     14..12=0x2 vd 6..0=0x57
diff --git a/extensions/unratified/rv_zvkgs b/extensions/unratified/rv_zvkgs
new file mode 100644
index 00000000..1252cae3
--- /dev/null
+++ b/extensions/unratified/rv_zvkgs
@@ -0,0 +1,8 @@
+# Zvkgs - Vector-Scalar GCM/GMAC
+
+# Vector Multiply over GHASH Galois-Field
+vgmul.vs 31..26=0x29 25=1 vs2 19..15=0x11 14..12=0x2 vd 6..0=0x77
+
+# Vector Add-Multiply over GHASH Galois-Field
+vghsh.vs 31..26=0x23 25=1 vs2 vs1 14..12=0x2 vd 6..0=0x77
+