diff --git a/sys/arm64/arm64/locore.S b/sys/arm64/arm64/locore.S
--- a/sys/arm64/arm64/locore.S
+++ b/sys/arm64/arm64/locore.S
@@ -302,7 +302,7 @@
 	 */
 	tst	x4, #HCR_E2H
 	mov	x3, #CPTR_RES1	/* HCR_E2H == 0 */
-	mov	x5, #CPTR_FPEN	/* HCR_E2H == 1 */
+	mov	x5, #(CPTR_SMEN | CPTR_FPEN | CPTR_ZEN)	/* HCR_E2H == 1 */
 	csel	x2, x3, x5, eq
 	msr	cptr_el2, x2
 
diff --git a/sys/arm64/include/hypervisor.h b/sys/arm64/include/hypervisor.h
--- a/sys/arm64/include/hypervisor.h
+++ b/sys/arm64/include/hypervisor.h
@@ -45,10 +45,12 @@
 /* CPTR_EL2 - Architecture feature trap register */
 /* Valid if HCR_EL2.E2H == 0 */
 #define	CPTR_RES0	0x7fefc800
-#define	CPTR_RES1	0x000033ff
+#define	CPTR_RES1	0x000022ff
 #define	CPTR_TFP	0x00000400
 /* Valid if HCR_EL2.E2H == 1 */
+#define	CPTR_ZEN	0x00030000
 #define	CPTR_FPEN	0x00300000
+#define	CPTR_SMEN	0x03000000
 /* Unconditionally valid */
 #define	CPTR_TTA	0x00100000
 #define	CPTR_TCPAC	0x80000000