diff --git a/stand/efi/gptboot/Makefile b/stand/efi/gptboot/Makefile
index 7d6dee85f93f..2dcf8dda8f59 100644
--- a/stand/efi/gptboot/Makefile
+++ b/stand/efi/gptboot/Makefile
@@ -1,17 +1,18 @@
 # $FreeBSD$
 
 # ZFS is not supported, we want debugging until this is vetted and
 # we don't want the gptboot.efifat thing created.
 MK_LOADER_ZFS=no
 EFI_DEBUG=yes
 
 BOOT1?=		gptboot
+MAN=		gptboot.efi.8
 .PATH:		${SRCTOP}/stand/efi/boot1 ${SRCTOP}/stand/libsa
 CFLAGS+=	-I${SRCTOP}/stand/efi/boot1
 CFLAGS+=	-I${.CURDIR}
 CFLAGS+=	-DBOOTPROG=\"gptboot.efi\"
 CFLAGS+=	-DHAVE_MEMCPY -I${SRCTOP}/sys/contrib/zlib
 SRCS+=		gpt.c
 CWARNFLAGS.gpt.c+=	-Wno-sign-compare -Wno-cast-align
 WARNS?=6
 .include "${.CURDIR}/../boot1/Makefile"
diff --git a/stand/i386/gptboot/gptboot.8 b/stand/efi/gptboot/gptboot.efi.8
similarity index 73%
copy from stand/i386/gptboot/gptboot.8
copy to stand/efi/gptboot/gptboot.efi.8
index 06ccaa37cdce..134c5353e9f1 100644
--- a/stand/i386/gptboot/gptboot.8
+++ b/stand/efi/gptboot/gptboot.efi.8
@@ -1,259 +1,282 @@
-.\" Copyright (c) 2013 Warren Block
-.\" All rights reserved.
+.\" Copyright (c) 2013 Warren Block All rights reserved.
+.\" Copyright (c) 2021 Warner Losh
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 30, 2019
-.Dt GPTBOOT 8
+.Dd April 6, 2021
+.Dt GPTBOOT.EFI 8
 .Os
 .Sh NAME
-.Nm gptboot
-.Nd GPT bootcode for UFS on BIOS-based computers
+.Nm gptboot.efi
+.Nd GPT bootcode for UFS on UEFI computers
 .Sh DESCRIPTION
 .Nm
-is used on BIOS-based computers to boot from a UFS partition on a
+is used on UEFI computers to boot from a UFS partition on a
 GPT-partitioned disk.
 .Nm
-is installed in a
-.Cm freebsd-boot
-partition with
-.Xr gpart 8 .
+is installed in the EFI System Partition (ESP).
+For BIOS-based computers,
+see
+.Xr gptboot 8
+for details.
+While conceptually similar, the details differ.
+.Nm
+works only with UFS root file systems.
+Users with ZFS partitions should use
+.Xr loader.efi 8
+with
+.Xr bectl 8
+to control what dataset is used for root.
+.Pp
+What UEFI computers boot is usually controlled via the mechanisms explained in
+.Xr efibootmgr 8
+using
+.Xr loader.efi 8
+or
+.Xr boot1.efi 8 .
+However, some setups cannot use those mechanisms.
+When the users cannot rely on host-supplied UEFI variables
+or they want the contents of the media alone to decide root,
+.Nm
+accomplishes these goals.
 .Pp
 When it starts,
 .Nm
 first reads the GPT and determines which drive and partition to
 boot from, as described under
 .Sx BOOTING ,
 below.
-If it does not find an eligible partition, or if the user hits a
-key within three seconds,
-.Nm
-switches from auto-boot to interactive mode.
-Interactive mode allows manual selection of the disk, partition,
-filename, and boot option flags, as described in
-.Xr boot 8 .
+If it does not find an eligible partition, it returns to the UEFI
+firmware.
+The firmware will then try the next bootable item in the UEFI Boot Manager's
+list, if any, usually a different disk.
 .Sh IMPLEMENTATION NOTES
 The GPT standard allows a variable number of partitions, but
 .Nm
 only boots from tables with 128 partitions or less.
 .Sh PARTITION ATTRIBUTES
 .Nm
 checks and manages several attributes of GPT UFS partitions.
+These flags are
+.Fx
+specific and non-standard.
 .Bl -tag -width ".Cm bootfailed"
 .It Cm bootme
 Attempt to boot from this partition.
 If more than one partition has the
 .Cm bootme
 attribute set,
 .Nm
 will attempt to boot each one until successful.
 .It Cm bootonce
 Attempt to boot from this partition only one time.
 Setting this attribute with
 .Xr gpart 8
 automatically also sets the
 .Cm bootme
 attribute.
 Multiple partitions may have the
 .Cm bootonce
 and
 .Cm bootme
 attributes set.
 .It Cm bootfailed
 The
 .Cm bootfailed
 attribute marks partitions that had the
 .Cm bootonce
 attribute set, but failed to boot.
 This attribute is managed by the system.
 See
 .Sx "BOOTING"
 and
 .Sx "POST-BOOT ACTIONS"
 below for details.
 .El
 .Sh USAGE
 For normal usage, the user does not have to set or manage any of the
 partition attributes.
 .Nm
-will boot from the first UFS partition found.
+will boot from the first UFS partition found on the device.
 .Pp
 The
 .Cm bootonce
 attribute can be used for testing an upgraded operating system on
 an already-working computer.
 The existing system partition is left untouched, and the new version
 of the operating system to be tested is installed on another partition.
 The
 .Cm bootonce
 attribute is set on that new test partition.
 The next boot is attempted from the test partition.
 Success or failure will be shown in the system log files.
 After a successful boot of the test partition, a user script can check
 the logs and change the
 .Cm bootme
 attributes so the test partition becomes the new system partition.
 Because the
 .Cm bootonce
 attribute is cleared after an attempted boot, a failed boot will not
 leave the system attempting to boot from a partition that will never
 succeed.
 Instead, the system will boot from the older, known-working operating
 system that has not been modified.
 If the
 .Cm bootme
 attribute is set on any partitions, booting will be attempted from them
 first.
 If no partitions with
 .Cm bootme
 attributes are found, booting will be attempted from the first UFS
 partition found.
 .Sh BOOTING
 .Nm
 first reads the partition table.
 All
 .Cm freebsd-ufs
 partitions with only the
 .Cm bootonce
 attribute set, indicating a failed boot, are set to
 .Cm bootfailed .
 .Nm
 then scans through all of the
 .Cm freebsd-ufs
 partitions.
 Boot behavior depends on the combination of
 .Cm bootme
 and
 .Cm bootonce
 attributes set on those partitions.
 .Bl -tag -width ".Cm bootonce + .Cm bootme"
 .It Cm bootonce + Cm bootme
 Highest priority: booting is attempted from each of the
 .Cm freebsd-ufs
 partitions with both of these attributes.
 On each partition, the
 .Cm bootme
 attribute is removed and the boot attempted.
 .It Cm bootme
 Middle priority: booting is attempted from each of the
 .Cm freebsd-ufs
 partitions with the
 .Cm bootme
 attribute.
 .El
 .Pp
 If neither
 .Cm bootonce
 nor
 .Cm bootme
 attributes are found on any partitions, booting is attempted from the
 first
 .Cm freebsd-ufs
 partition on the disk.
 .Sh POST-BOOT ACTIONS
 The startup script
 .Pa /etc/rc.d/gptboot
 checks the attributes of
 .Cm freebsd-ufs
 partitions on all GPT disks.
 Partitions with the
 .Cm bootfailed
 attribute generate a
 .Dq boot from X failed
 system log message.
 Partitions with only the
 .Cm bootonce
 attribute, indicating a partition that successfully booted, generate a
 .Dq boot from X succeeded
 system log message.
 The
 .Cm bootfailed
 attributes are cleared from all the partitions.
 The
 .Cm bootonce
 attribute is cleared from the partition that successfully booted.
 There is normally only one of these.
 .Sh FILES
-.Bl -tag -width /boot/gptboot -compact
-.It Pa /boot/gptboot
+.Bl -tag -width /boot/gptboot.efi -compact
+.It Pa /boot/gptboot.efi
 bootcode binary
-.It Pa /boot.config
-parameters for the boot blocks
-.Pq optional
+.It Pa /boot/efi/efi/boot/bootx64.efi
+Default boot loader for amd64 systems.
+.It Pa /boot/efi/efi/boot/bootaa64.efi
+Default boot loader for arm64 systems.
+.It Pa /boot/efi/efi/boot/bootarm.efi
+Default boot loader for arm systems.
+.It Pa /boot/efi/efi/boot/bootriscv64.efi
+Default boot loader for riscv systems.
 .El
 .Sh EXAMPLES
 .Nm
-is installed in a
-.Cm freebsd-boot
-partition, usually the first partition on the disk.
-A
-.Dq protective MBR
-.Po
-see
-.Xr gpart 8
-.Pc
-is typically installed in combination with
-.Nm .
+is installed in the ESP with
+.Xr cp 1 .
 .Pp
 Install
 .Nm
-on the
-.Pa ada0
-drive:
-.Bd -literal -offset indent
-gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 ada0
-.Ed
-.Pp
-.Nm
-can also be installed without the PMBR:
-.Bd -literal -offset indent
-gpart bootcode -p /boot/gptboot -i 1 ada0
+into the ESP for the system.
+This assumes the ESP is mounted in the standard
+.Pa /boot/efi
+directory.
+For amd64, use the following
+.Bd -literal -offset indent -compact
+cp /boot/gptboot.efi /boot/efi/efi/boot/bootx64.efi
 .Ed
+For other systems, use the file listed in the
+.Sx FILES
+section.
 .Pp
 Set the
 .Cm bootme
 attribute for partition 2:
 .Bd -literal -offset indent
 gpart set -a bootme -i 2 ada0
 .Ed
 .Pp
 Set the
 .Cm bootonce
 attribute for partition 2, automatically also setting the
 .Cm bootme
 attribute:
 .Bd -literal -offset indent
 gpart set -a bootonce -i 2 ada0
 .Ed
 .Sh SEE ALSO
-.Xr boot.config 5 ,
 .Xr rc.conf 5 ,
 .Xr boot 8 ,
-.Xr gpart 8
+.Xr efibootmgr 8 ,
+.Xr gpart 8 ,
+.Xr gptboot 8 ,
+.Xr loader.efi 8
 .Sh HISTORY
 .Nm
-appeared in FreeBSD 7.1.
+appeared in
+.Fx 13.0
 .Sh AUTHORS
 This manual page written by
+.An Warner Losh Aq imp@FreeBSD.org .
+It is based heavily on the
+.Xr gptboot 8
+man page by
 .An Warren Block Aq wblock@FreeBSD.org .
diff --git a/stand/i386/gptboot/gptboot.8 b/stand/i386/gptboot/gptboot.8
index 06ccaa37cdce..fa6eecc3cfab 100644
--- a/stand/i386/gptboot/gptboot.8
+++ b/stand/i386/gptboot/gptboot.8
@@ -1,259 +1,263 @@
 .\" Copyright (c) 2013 Warren Block
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 30, 2019
+.Dd April 6, 2021
 .Dt GPTBOOT 8
 .Os
 .Sh NAME
 .Nm gptboot
 .Nd GPT bootcode for UFS on BIOS-based computers
 .Sh DESCRIPTION
 .Nm
 is used on BIOS-based computers to boot from a UFS partition on a
 GPT-partitioned disk.
 .Nm
 is installed in a
 .Cm freebsd-boot
 partition with
 .Xr gpart 8 .
+For UEFI,
+.Xr gptboot.efi 8
+is used instead.
+While conceptually similar, the details differ.
 .Pp
 When it starts,
 .Nm
 first reads the GPT and determines which drive and partition to
 boot from, as described under
 .Sx BOOTING ,
 below.
 If it does not find an eligible partition, or if the user hits a
 key within three seconds,
 .Nm
 switches from auto-boot to interactive mode.
 Interactive mode allows manual selection of the disk, partition,
 filename, and boot option flags, as described in
 .Xr boot 8 .
 .Sh IMPLEMENTATION NOTES
 The GPT standard allows a variable number of partitions, but
 .Nm
 only boots from tables with 128 partitions or less.
 .Sh PARTITION ATTRIBUTES
 .Nm
 checks and manages several attributes of GPT UFS partitions.
 .Bl -tag -width ".Cm bootfailed"
 .It Cm bootme
 Attempt to boot from this partition.
 If more than one partition has the
 .Cm bootme
 attribute set,
 .Nm
 will attempt to boot each one until successful.
 .It Cm bootonce
 Attempt to boot from this partition only one time.
 Setting this attribute with
 .Xr gpart 8
 automatically also sets the
 .Cm bootme
 attribute.
 Multiple partitions may have the
 .Cm bootonce
 and
 .Cm bootme
 attributes set.
 .It Cm bootfailed
 The
 .Cm bootfailed
 attribute marks partitions that had the
 .Cm bootonce
 attribute set, but failed to boot.
 This attribute is managed by the system.
 See
 .Sx "BOOTING"
 and
 .Sx "POST-BOOT ACTIONS"
 below for details.
 .El
 .Sh USAGE
 For normal usage, the user does not have to set or manage any of the
 partition attributes.
 .Nm
 will boot from the first UFS partition found.
 .Pp
 The
 .Cm bootonce
 attribute can be used for testing an upgraded operating system on
 an already-working computer.
 The existing system partition is left untouched, and the new version
 of the operating system to be tested is installed on another partition.
 The
 .Cm bootonce
 attribute is set on that new test partition.
 The next boot is attempted from the test partition.
 Success or failure will be shown in the system log files.
 After a successful boot of the test partition, a user script can check
 the logs and change the
 .Cm bootme
 attributes so the test partition becomes the new system partition.
 Because the
 .Cm bootonce
 attribute is cleared after an attempted boot, a failed boot will not
 leave the system attempting to boot from a partition that will never
 succeed.
 Instead, the system will boot from the older, known-working operating
 system that has not been modified.
 If the
 .Cm bootme
 attribute is set on any partitions, booting will be attempted from them
 first.
 If no partitions with
 .Cm bootme
 attributes are found, booting will be attempted from the first UFS
 partition found.
 .Sh BOOTING
 .Nm
 first reads the partition table.
 All
 .Cm freebsd-ufs
 partitions with only the
 .Cm bootonce
 attribute set, indicating a failed boot, are set to
 .Cm bootfailed .
 .Nm
 then scans through all of the
 .Cm freebsd-ufs
 partitions.
 Boot behavior depends on the combination of
 .Cm bootme
 and
 .Cm bootonce
 attributes set on those partitions.
 .Bl -tag -width ".Cm bootonce + .Cm bootme"
 .It Cm bootonce + Cm bootme
 Highest priority: booting is attempted from each of the
 .Cm freebsd-ufs
 partitions with both of these attributes.
 On each partition, the
 .Cm bootme
 attribute is removed and the boot attempted.
 .It Cm bootme
 Middle priority: booting is attempted from each of the
 .Cm freebsd-ufs
 partitions with the
 .Cm bootme
 attribute.
 .El
 .Pp
 If neither
 .Cm bootonce
 nor
 .Cm bootme
 attributes are found on any partitions, booting is attempted from the
 first
 .Cm freebsd-ufs
 partition on the disk.
 .Sh POST-BOOT ACTIONS
 The startup script
 .Pa /etc/rc.d/gptboot
 checks the attributes of
 .Cm freebsd-ufs
 partitions on all GPT disks.
 Partitions with the
 .Cm bootfailed
 attribute generate a
 .Dq boot from X failed
 system log message.
 Partitions with only the
 .Cm bootonce
 attribute, indicating a partition that successfully booted, generate a
 .Dq boot from X succeeded
 system log message.
 The
 .Cm bootfailed
 attributes are cleared from all the partitions.
 The
 .Cm bootonce
 attribute is cleared from the partition that successfully booted.
 There is normally only one of these.
 .Sh FILES
 .Bl -tag -width /boot/gptboot -compact
 .It Pa /boot/gptboot
 bootcode binary
 .It Pa /boot.config
 parameters for the boot blocks
 .Pq optional
 .El
 .Sh EXAMPLES
 .Nm
 is installed in a
 .Cm freebsd-boot
 partition, usually the first partition on the disk.
 A
 .Dq protective MBR
 .Po
 see
 .Xr gpart 8
 .Pc
 is typically installed in combination with
 .Nm .
 .Pp
 Install
 .Nm
 on the
 .Pa ada0
 drive:
 .Bd -literal -offset indent
 gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 ada0
 .Ed
 .Pp
 .Nm
 can also be installed without the PMBR:
 .Bd -literal -offset indent
 gpart bootcode -p /boot/gptboot -i 1 ada0
 .Ed
 .Pp
 Set the
 .Cm bootme
 attribute for partition 2:
 .Bd -literal -offset indent
 gpart set -a bootme -i 2 ada0
 .Ed
 .Pp
 Set the
 .Cm bootonce
 attribute for partition 2, automatically also setting the
 .Cm bootme
 attribute:
 .Bd -literal -offset indent
 gpart set -a bootonce -i 2 ada0
 .Ed
 .Sh SEE ALSO
 .Xr boot.config 5 ,
 .Xr rc.conf 5 ,
 .Xr boot 8 ,
 .Xr gpart 8
 .Sh HISTORY
 .Nm
 appeared in FreeBSD 7.1.
 .Sh AUTHORS
 This manual page written by
 .An Warren Block Aq wblock@FreeBSD.org .
diff --git a/stand/man/boot1.efi.8 b/stand/man/boot1.efi.8
index 74758a0c5660..efd3c2c93d5e 100644
--- a/stand/man/boot1.efi.8
+++ b/stand/man/boot1.efi.8
@@ -1,99 +1,109 @@
 .\"
 .\" Copyright (c) 2020 Netflix, Inc
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 1, 2020
+.Dd April 6, 2021
 .Dt BOOT1.EFI 8
 .Os
 .Sh NAME
 .Nm boot1.efi
 .Nd UEFI chain loader
 .Sh DESCRIPTION
 .Nm
 has been deprecated and will be removed from a future release.
-.Xr loader.efi 8 handles all its former use cases with more flexibility.
+.Xr loader.efi 8
+handles all its former use cases with more flexibility.
 .Pp
 On UEFI systems,
 .Nm
 loads
 .Pa /boot/loader.efi
 from the default root file system and transfers execution there.
+Some systems may need to use
+.Xr gptboot.efi 8
+when
+.Xr loader.efi 8
+cannot be used directly on the ESP (EFI System Partition).
 .Ss Initialization
 Before looking for the boot device,
 .Nm
 does the following initialization
 .Bl -bullet
 .It
 Sets up the console using the default UEFI console routines.
 .It
 Discovers all possible block devices on the system.
 .It
 Initializes all file system modules to read files from those devices
 .El
 .Ss Boot Device Selection
 .Nm
 uses the following sequence to determine the root file system for
 booting:
 .Bl -bullet
 .It
 If ZFS is configured,
 .Nm
 will search the for zpools that are bootable, preferring the zpool on
 the boot device over the others.
 .It
 If UFS is configured,
 .Nm
 will search all UFS partitions for a bootable partition.
 It will prefer the lowest numbered bootable partition on the boot
 device over all other choices.
 It will fall back to partitions on other devices if none are found.
 .El
 .Pp
 A partition is considered bootable if it can load
 .Pa /boot/loader.efi
 from it.
 Command line arguments to the next boot stage are
 read from the first existing file of
 .Pa /boot.config
 or
 .Pa /boot/config
 in that order.
 .Ss Caveats
 .Bl -bullet
 .It
 The order in which file systems are tried is undefined.
 .It
 No encryption support is available.
 .It
 There's no way to interrupt the boot process to select booting from some
 other location.
 .It
 When configuring a serial console for FreeBSD, but not for UEFI, no output
 will show up on the serial console from boot1.efi.
 .It
 There's no support for marking partitions as the preferred one.
+See
+.Xr gptboot.efi 8 .
 .It
 There's no support for boot-once functionality.
+See
+.Xr gptboot.efi 8 .
 .El