diff --git a/grub-core/kern/emu/bhyve_hostif.c b/grub-core/kern/emu/bhyve_hostif.c
index 8e03778..2cb128a 100644
--- a/grub-core/kern/emu/bhyve_hostif.c
+++ b/grub-core/kern/emu/bhyve_hostif.c
@@ -46,6 +46,7 @@ static struct vmctx *bhyve_ctx;
 
 static int bhyve_cinsert = 1;
 static int bhyve_vgainsert = 1;
+static int bhyve_memwire = 0;
 
 #define BHYVE_MAXSEGS	5
 struct {
@@ -113,6 +114,13 @@ grub_emu_bhyve_init(const char *name, grub_uint64_t memsz)
       return GRUB_ERR_BUG;
     }
 
+#ifdef VM_MEM_F_WIRED
+  if (bhyve_memwire)
+    {
+      vm_set_memflags(bhyve_ctx, VM_MEM_F_WIRED);
+    }
+#endif
+
   err = vm_setup_memory (bhyve_ctx, memsz, VM_MMAP_ALL);
   if (err) {
     fprintf (stderr, "Could not setup memory for VM\n");
@@ -403,3 +411,22 @@ grub_emu_bhyve_vgainsert(void)
 {
   return bhyve_vgainsert;
 }
+
+int
+grub_emu_bhyve_memwire_avail(void)
+{
+
+#ifdef VM_MEM_F_WIRED
+  return (1);
+#else
+  return (0);
+#endif
+}
+
+void
+grub_emu_bhyve_set_memwire(void)
+{
+#ifdef VM_MEM_F_WIRED
+  bhyve_memwire = 1;
+#endif
+}
diff --git a/grub-core/kern/emu/main.c b/grub-core/kern/emu/main.c
index f26024e..82341e8 100644
--- a/grub-core/kern/emu/main.c
+++ b/grub-core/kern/emu/main.c
@@ -227,6 +227,47 @@ static struct argp argp = {
   NULL, help_filter, NULL
 };
 
+#ifdef BHYVE
+/*
+ * Represent run-time conditional options as argp child options.
+ * The only one at this point is the "-S" option to force wiring
+ * of guest memory on >= 11.0-r284539.
+ */
+static struct argp_option bhyve_options[] = {
+  {0, 'S', 0, 0, N_("Force wiring of guest memory."), 0},
+  { 0, 0, 0, 0, 0, 0 }
+};
+
+static error_t
+bhyve_opt_parser (int key, char *arg, struct argp_state *state)
+{
+
+  switch (key)
+    {
+    case 'S':
+      grub_emu_bhyve_set_memwire();
+      break;
+    default:
+      return ARGP_ERR_UNKNOWN;
+    }
+  return 0;
+}
+
+static struct argp bhyve_opt_argp = {
+  bhyve_options,
+  bhyve_opt_parser
+};
+
+static struct argp_child bhyve_opt_child = {
+  &bhyve_opt_argp,
+  0,
+  "",
+  2
+};
+
+static struct argp_child bhyve_argp_children[2];
+#endif
+
 
 
 void grub_hostfs_init (void);
@@ -255,6 +296,12 @@ main (int argc, char *argv[])
 
 #ifdef BHYVE
   grub_cfg = xstrdup (DEFAULT_GRUB_CFG);
+
+  if (grub_emu_bhyve_memwire_avail()) {
+    bhyve_argp_children[0] = bhyve_opt_child;
+    bhyve_argp_children[1].argp = NULL;
+    argp.children = bhyve_argp_children;
+  }    
 #endif
 
   if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
diff --git a/include/grub/emu/bhyve.h b/include/grub/emu/bhyve.h
index 2662650..b2b7b2a 100644
--- a/include/grub/emu/bhyve.h
+++ b/include/grub/emu/bhyve.h
@@ -47,6 +47,8 @@ int  grub_emu_bhyve_parse_memsize(const char *arg, grub_uint64_t *size);
 void grub_emu_bhyve_set_console_dev(const char *dev);
 void grub_emu_bhyve_unset_cinsert(void);
 void grub_emu_bhyve_unset_vgainsert(void);
+int  grub_emu_bhyve_memwire_avail(void);
+void grub_emu_bhyve_set_memwire(void);
 int  EXPORT_FUNC(grub_emu_bhyve_cinsert) (void);
 int  EXPORT_FUNC(grub_emu_bhyve_vgainsert) (void);
 void EXPORT_FUNC(grub_emu_bhyve_boot32)(grub_uint32_t bootaddr,