bug#26815: [PATCH v4 3/3] vm: Add UEFI loader to disk images.

[Marius Bakke <mbakke@fastmail.com>]

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Marius Bakke <mbakke@fastmail.com> writes:

>> Once we’re done with that, we’ll have to update one of the
>> ‘operating-system’ declaration examples to show UEFI configuration, and
>> to update the doc to explain the installation process for UEFI.
>
> I'll get on that.

Here is a start on UEFI documentation update. Not sure if it's okay to
hijack the lightweight desktop template, or if it's better to have an
example closer to the (GRUB Configuration) section.


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From 9db5b8acb017b8f283d36d09835f947879be4e30 Mon Sep 17 00:00:00 2001
From: Marius Bakke <mbakke@fastmail.com>
Date: Thu, 18 May 2017 19:24:36 +0200
Subject: [PATCH] doc: Update GRUB EFI instructions.

* doc/guix.texi (USB Stick Installation): Mention UEFI.
(Preparing for Installation): Add note about EFI System Partition.
(Proceeding with the Installation): Mention the GRUB-EFI package.
(GRUB Configuration): Likewise.
(Using the Configuration System): Hijack lightweight desktop to include UEFI.
* gnu/system/examples/lightweight-desktop.tmpl: Adjust native EFI configuration.
---
 doc/guix.texi                                | 19 ++++++++++++++-----
 gnu/system/examples/lightweight-desktop.tmpl | 25 ++++++++++++++++---------
 2 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 72741e034..fb67ea50d 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -7322,8 +7322,8 @@ Access to @file{/dev/sdX} usually requires root privileges.
 @end enumerate
 
 Once this is done, you should be able to reboot the system and boot from
-the USB stick.  The latter usually requires you to get in the BIOS' boot
-menu, where you can choose to boot from the USB stick.
+the USB stick.  The latter usually requires you to get in the BIOS' or
+UEFI boot menu, where you can choose to boot from the USB stick.
 
 @xref{Installing GuixSD in a VM}, if, instead, you would like to install
 GuixSD in a virtual machine (VM).
@@ -7477,6 +7477,14 @@ install BIOS-based GRUB (which is the default), make sure a BIOS Boot
 Partition is available (@pxref{BIOS installation,,, grub, GNU GRUB
 manual}).
 
+If you instead wish to use EFI-based grub, a FAT32 EFI System Partition
+is required.  This partition should be mounted at @file{/boot/efi} and
+must have the @dfn{esp} flag set.  E.g. for @command{parted}:
+
+@example
+parted /dev/sda set 1 esp on
+@end example
+
 Once you are done partitioning the target hard disk drive, you have to
 create a file system on the relevant partition(s)@footnote{Currently
 GuixSD only supports ext4 and btrfs file systems.  In particular, code
@@ -7590,7 +7598,8 @@ in particular:
 @itemize
 @item
 Make sure the @code{grub-configuration} form refers to the device you
-want to install GRUB on.
+want to install GRUB on.  You also need to specify the @code{grub-efi}
+package if you wish to use native UEFI boot.
 
 @item
 Be sure that your partition labels match the value of their respective
@@ -7879,7 +7888,7 @@ management, power management, and more, would look like this:
 @include os-config-desktop.texi
 @end lisp
 
-A graphical environment with a choice of lightweight window managers
+A graphical UEFI system with a choice of lightweight window managers
 instead of full-blown desktop environments would look like this:
 
 @lisp
@@ -15277,7 +15286,7 @@ The number of seconds to wait for keyboard input before booting.  Set to
 The @code{grub-theme} object describing the theme to use.
 
 @item @code{grub} (default: @code{grub})
-The GRUB package to use.
+The GRUB package to use.  Currently either @code{grub} or @code{grub-efi}.
 
 @item @code{terminal-outputs} (default: @code{'gfxterm})
 The output terminals used for the GRUB boot menu, as a list of symbols.
diff --git a/gnu/system/examples/lightweight-desktop.tmpl b/gnu/system/examples/lightweight-desktop.tmpl
index 389ec8574..ad92ad163 100644
--- a/gnu/system/examples/lightweight-desktop.tmpl
+++ b/gnu/system/examples/lightweight-desktop.tmpl
@@ -4,7 +4,7 @@
 
 (use-modules (gnu) (gnu system nss))
 (use-service-modules desktop)
-(use-package-modules wm ratpoison certs suckless)
+(use-package-modules bootloaders wm ratpoison certs suckless)
 
 (operating-system
   (host-name "antelope")
@@ -13,14 +13,21 @@
 
   ;; Assuming /dev/sdX is the target hard disk, and "my-root"
   ;; is the label of the target root file system.
-  (bootloader (grub-configuration (device "/dev/sdX")))
-
-  (file-systems (cons (file-system
-                        (device "my-root")
-                        (title 'label)
-                        (mount-point "/")
-                        (type "ext4"))
-                      %base-file-systems))
+  (bootloader (grub-configuration (grub grub-efi)
+                                  (device "/dev/sdX")))
+
+  (file-systems (cons* (file-system
+                         (device "my-root")
+                         (title 'label)
+                         (mount-point "/")
+                         (type "ext4"))
+                       (file-system
+                         ;; Specify partition here since FAT
+                         ;; labels are currently unsupported.
+                         (device "/dev/sdX1")
+                         (mount-point "/boot/efi")
+                         (type "vfat"))
+                       %base-file-systems))
 
   (users (cons (user-account
                 (name "alice")
-- 
2.13.0


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