diff --git a/usr.sbin/bhyve/bhyve.8 b/usr.sbin/bhyve/bhyve.8
--- a/usr.sbin/bhyve/bhyve.8
+++ b/usr.sbin/bhyve/bhyve.8
@@ -494,6 +494,12 @@
 Disable emulation of guest trim requests via
 .Dv DIOCGDELETE
 requests.
+.It Li bootindex= Ns Ar index
+Add the device to the bootorder at
+.Ar index .
+A fwcfg file is used to specify the bootorder.
+The guest firmware may ignore or doesn't support this fwcfg file.
+In that case, this feature doesn't work as expected.
 .El
 .Pp
 SCSI device backends:
@@ -511,6 +517,12 @@
 .It Cm iid= Ns Ar IID
 Initiator ID to use when sending requests to specified CTL port.
 The default value is 0.
+.It Li bootindex= Ns Ar index
+Add the device to the bootorder at
+.Ar index .
+A fwcfg file is used to specify the bootorder.
+The guest firmware may ignore or doesn't support this fwcfg file.
+In that case, this feature doesn't work as expected.
 .El
 .Pp
 9P device backends:
@@ -608,6 +620,12 @@
 .Ar romfile
 as option ROM to the PCI device.
 The ROM will be loaded by firmware and should be capable of initializing the device.
+.It Li bootindex= Ns Ar index
+Add the device to the bootorder at
+.Ar index .
+A fwcfg file is used to specify the bootorder.
+The guest firmware may ignore or doesn't support this fwcfg file.
+In that case, this feature doesn't work as expected.
 .El
 .Pp
 Guest memory must be wired using the
diff --git a/usr.sbin/bhyve/block_if.h b/usr.sbin/bhyve/block_if.h
--- a/usr.sbin/bhyve/block_if.h
+++ b/usr.sbin/bhyve/block_if.h
@@ -62,11 +62,13 @@
 	struct iovec	br_iov[BLOCKIF_IOV_MAX];
 };
 
+struct pci_devinst;
 struct blockif_ctxt;
 
 typedef void blockif_resize_cb(struct blockif_ctxt *, void *, size_t);
 
 int	blockif_legacy_config(nvlist_t *nvl, const char *opts);
+int 	blockif_add_boot_device(struct pci_devinst *const pi, struct blockif_ctxt *const bc);
 struct blockif_ctxt *blockif_open(nvlist_t *nvl, const char *ident);
 int	blockif_register_resize_callback(struct blockif_ctxt *bc,
     blockif_resize_cb *cb, void *cb_arg);
diff --git a/usr.sbin/bhyve/block_if.c b/usr.sbin/bhyve/block_if.c
--- a/usr.sbin/bhyve/block_if.c
+++ b/usr.sbin/bhyve/block_if.c
@@ -122,6 +122,7 @@
 	TAILQ_HEAD(, blockif_elem) bc_pendq;
 	TAILQ_HEAD(, blockif_elem) bc_busyq;
 	struct blockif_elem	bc_reqs[BLOCKIF_MAXREQ];
+	int			bc_bootindex;
 };
 
 static pthread_once_t blockif_once = PTHREAD_ONCE_INIT;
@@ -466,12 +467,22 @@
 	return (pci_parse_legacy_config(nvl, cp + 1));
 }
 
+int
+blockif_add_boot_device(struct pci_devinst *const pi,
+    struct blockif_ctxt *const bc)
+{
+	if (bc->bc_bootindex < 0)
+		return (0);
+
+	return (pci_emul_add_boot_device(pi, bc->bc_bootindex));
+}
+
 struct blockif_ctxt *
 blockif_open(nvlist_t *nvl, const char *ident)
 {
 	char tname[MAXCOMLEN + 1];
 	char name[MAXPATHLEN];
-	const char *path, *pssval, *ssval;
+	const char *path, *pssval, *ssval, *bootindex_val;
 	char *cp;
 	struct blockif_ctxt *bc;
 	struct stat sbuf;
@@ -480,6 +491,7 @@
 	int extra, fd, i, sectsz;
 	int ro, candelete, geom, ssopt, pssopt;
 	int nodelete;
+	int bootindex;
 
 #ifndef WITHOUT_CAPSICUM
 	cap_rights_t rights;
@@ -493,6 +505,7 @@
 	ssopt = 0;
 	ro = 0;
 	nodelete = 0;
+	bootindex = -1;
 
 	if (get_config_bool_node_default(nvl, "nocache", false))
 		extra |= O_DIRECT;
@@ -525,6 +538,11 @@
 		}
 	}
 
+	bootindex_val = get_config_value_node(nvl, "bootindex");
+	if (bootindex_val != NULL) {
+		bootindex = atoi(bootindex_val);
+	}
+
 	path = get_config_value_node(nvl, "path");
 	if (path == NULL) {
 		EPRINTLN("Missing \"path\" for block device.");
@@ -644,6 +662,7 @@
 	TAILQ_INIT(&bc->bc_freeq);
 	TAILQ_INIT(&bc->bc_pendq);
 	TAILQ_INIT(&bc->bc_busyq);
+	bc->bc_bootindex = bootindex;
 	for (i = 0; i < BLOCKIF_MAXREQ; i++) {
 		bc->bc_reqs[i].be_status = BST_FREE;
 		TAILQ_INSERT_HEAD(&bc->bc_freeq, &bc->bc_reqs[i], be_link);
diff --git a/usr.sbin/bhyve/pci_ahci.c b/usr.sbin/bhyve/pci_ahci.c
--- a/usr.sbin/bhyve/pci_ahci.c
+++ b/usr.sbin/bhyve/pci_ahci.c
@@ -2477,6 +2477,13 @@
 			ret = 1;
 			goto open_fail;
 		}
+
+		ret = blockif_add_boot_device(pi, bctxt);
+		if (ret) {
+			sc->ports = p;
+			goto open_fail;
+		}
+
 		sc->port[p].bctx = bctxt;
 		sc->port[p].pr_sc = sc;
 		sc->port[p].port = p;
diff --git a/usr.sbin/bhyve/pci_nvme.c b/usr.sbin/bhyve/pci_nvme.c
--- a/usr.sbin/bhyve/pci_nvme.c
+++ b/usr.sbin/bhyve/pci_nvme.c
@@ -3159,6 +3159,14 @@
 			sc->dataset_management = NVME_DATASET_MANAGEMENT_DISABLE;
 	}
 
+	value = get_config_value_node(nvl, "bootindex");
+	if (value != NULL) {
+		if (pci_emul_add_boot_device(sc->nsc_pi, atoi(value))) {
+			EPRINTLN("Invalid bootindex %d", atoi(value));
+			return (-1);
+		}
+	}
+
 	value = get_config_value_node(nvl, "ram");
 	if (value != NULL) {
 		uint64_t sz = strtoull(value, NULL, 10);
diff --git a/usr.sbin/bhyve/pci_virtio_block.c b/usr.sbin/bhyve/pci_virtio_block.c
--- a/usr.sbin/bhyve/pci_virtio_block.c
+++ b/usr.sbin/bhyve/pci_virtio_block.c
@@ -471,6 +471,11 @@
 		return (1);
 	}
 
+	if (blockif_add_boot_device(pi, bctxt)) {
+		perror("Invalid boot device");
+		return (1);
+	}
+
 	size = blockif_size(bctxt);
 	sectsz = blockif_sectsz(bctxt);
 	blockif_psectsz(bctxt, &sts, &sto);
diff --git a/usr.sbin/bhyve/pci_virtio_scsi.c b/usr.sbin/bhyve/pci_virtio_scsi.c
--- a/usr.sbin/bhyve/pci_virtio_scsi.c
+++ b/usr.sbin/bhyve/pci_virtio_scsi.c
@@ -709,6 +709,15 @@
 	if (value != NULL)
 		sc->vss_iid = strtoul(value, NULL, 10);
 
+	value = get_config_value_node(nvl, "bootindex");
+	if (value != NULL) {
+		if (pci_emul_add_boot_device(pi, atoi(value))) {
+			EPRINTLN("Invalid bootindex %d", atoi(value));
+			free(sc);
+			return (-1);
+		}
+	}
+
 	devname = get_config_value_node(nvl, "dev");
 	if (devname == NULL)
 		devname = "/dev/cam/ctl";