diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
--- a/sys/arm64/arm64/pmap.c
+++ b/sys/arm64/arm64/pmap.c
@@ -8175,6 +8175,12 @@
 		else if (i == pmap_l0_index(KASAN_MIN_ADDRESS))
 			sbuf_printf(sb, "\nKASAN shadow map:\n");
 #endif
+#ifdef KMSAN
+		else if (i == pmap_l0_index(KMSAN_SHAD_MIN_ADDRESS))
+			sbuf_printf(sb, "\nKMSAN shadow map:\n");
+		else if (i == pmap_l0_index(KMSAN_ORIG_MIN_ADDRESS))
+			sbuf_printf(sb, "\nKMSAN origin map:\n");
+#endif
 
 		l0e = kernel_pmap->pm_l0[i];
 		if ((l0e & ATTR_DESCR_VALID) == 0) {
diff --git a/sys/arm64/include/vmparam.h b/sys/arm64/include/vmparam.h
--- a/sys/arm64/include/vmparam.h
+++ b/sys/arm64/include/vmparam.h
@@ -131,6 +131,12 @@
  *                  0xfffffeffffffffff  End of DMAP
  *                  0xffffa00000000000  Start of DMAP
  *
+ *                  0xffff027fffffffff  End of KMSAN origin map
+ *                  0xffff020000000000  Start of KMSAN origin map
+ *
+ *                  0xffff017fffffffff  End of KMSAN shadow map
+ *                  0xffff010000000000  Start of KMSAN shadow map
+ *
  *                  0xffff009fffffffff  End of KASAN shadow map
  *                  0xffff008000000000  Start of KASAN shadow map
  *
@@ -167,6 +173,14 @@
 #define	KASAN_MIN_ADDRESS	(0xffff008000000000UL)
 #define	KASAN_MAX_ADDRESS	(0xffff00a000000000UL)
 
+/* 512GiB KMSAN shadow map */
+#define	KMSAN_SHAD_MIN_ADDRESS	(0xffff010000000000UL)
+#define	KMSAN_SHAD_MAX_ADDRESS	(0xffff018000000000UL)
+
+/* 512GiB KMSAN origin map */
+#define	KMSAN_ORIG_MIN_ADDRESS	(0xffff020000000000UL)
+#define	KMSAN_ORIG_MAX_ADDRESS	(0xffff028000000000UL)
+
 /* The address bits that hold a pointer authentication code */
 #define	PAC_ADDR_MASK		(0xff7f000000000000UL)