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authorMarius Bakke <mbakke@fastmail.com>2017-05-07 15:31:30 +0200
committerMarius Bakke <mbakke@fastmail.com>2017-05-19 12:59:25 +0200
commitecf5d5376979fadd971559367bf553df89fcc62b (patch)
tree285839edfdcb70e005c98aeecb93837a09d943df /gnu/build
parent4d415f0c3c0cf4acbc1297ccf2b27121846a4289 (diff)
vm: Add UEFI loader to disk images.
* gnu/build/vm.scm (install-efi): New procedure. (initialize-hard-disk): Generate EFI blob when ESP is present. * gnu/system/vm.scm (qemu-image): Append 40MiB EFI System Partition.
Diffstat (limited to 'gnu/build')
-rw-r--r--gnu/build/vm.scm61
1 files changed, 61 insertions, 0 deletions
diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index 7ce1ec8e1e..57619764ce 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -27,6 +27,7 @@
#:use-module (gnu build linux-boot)
#:use-module (gnu build install)
#:use-module (guix records)
+ #:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
@@ -315,12 +316,41 @@ SYSTEM-DIRECTORY is the name of the directory of the 'system' derivation."
(mkdir-p directory)
(symlink bootcfg (string-append directory "/bootcfg"))))
+(define (install-efi grub esp config-file)
+ "Write a self-contained GRUB EFI loader to the mounted ESP using CONFIG-FILE."
+ (let* ((system %host-type)
+ ;; Hard code the output location to a well-known path recognized by
+ ;; compliant firmware. See "3.5.1.1 Removable Media Boot Behaviour":
+ ;; http://www.uefi.org/sites/default/files/resources/UEFI%20Spec%202_6.pdf
+ (grub-mkstandalone (string-append grub "/bin/grub-mkstandalone"))
+ (efi-directory (string-append esp "/EFI/BOOT"))
+ ;; Map grub target names to boot file names.
+ (efi-targets (cond ((string-prefix? "x86_64" system)
+ '("x86_64-efi" . "BOOTX64.EFI"))
+ ((string-prefix? "i686" system)
+ '("i386-efi" . "BOOTIA32.EFI"))
+ ((string-prefix? "armhf" system)
+ '("arm-efi" . "BOOTARM.EFI"))
+ ((string-prefix? "aarch64" system)
+ '("arm64-efi" . "BOOTAA64.EFI")))))
+ ;; grub-mkstandalone requires a TMPDIR to prepare the firmware image.
+ (setenv "TMPDIR" esp)
+
+ (mkdir-p efi-directory)
+ (unless (zero? (system* grub-mkstandalone "-O" (car efi-targets)
+ "-o" (string-append efi-directory "/"
+ (cdr efi-targets))
+ ;; Graft the configuration file onto the image.
+ (string-append "boot/grub/grub.cfg=" config-file)))
+ (error "failed to create GRUB EFI image"))))
+
(define* (initialize-hard-disk device
#:key
bootloader-package
bootcfg
bootcfg-location
bootloader-installer
+ (grub-efi #f)
(partitions '()))
"Initialize DEVICE as a disk containing all the <partition> objects listed
in PARTITIONS, and using BOOTCFG as its bootloader configuration file.
@@ -332,8 +362,13 @@ passing it a directory name where it is mounted."
"Return the first partition found with the boot flag set."
(member 'boot (partition-flags partition)))
+ (define (partition-esp? partition)
+ "Return the first EFI System Partition."
+ (member 'esp (partition-flags partition)))
+
(let* ((partitions (initialize-partition-table device partitions))
(root (find partition-bootable? partitions))
+ (esp (find partition-esp? partitions))
(target "/fs"))
(unless root
(error "no bootable partition specified" partitions))
@@ -345,8 +380,34 @@ passing it a directory name where it is mounted."
(mount (partition-device root) target (partition-file-system root))
(install-boot-config bootcfg bootcfg-location target)
(when bootloader-installer
+ (display "installing bootloader...\n")
(bootloader-installer bootloader-package device target))
+ (when esp
+ ;; Mount the ESP somewhere and install GRUB UEFI image.
+ (let ((mount-point (string-append target "/boot/efi"))
+ (grub-config (string-append target "/tmp/grub-standalone.cfg")))
+ (display "mounting EFI system partition...\n")
+ (mkdir-p mount-point)
+ (mount (partition-device esp) mount-point
+ (partition-file-system esp))
+
+ ;; Create a tiny configuration file telling the embedded grub
+ ;; where to load the real thing.
+ (call-with-output-file grub-config
+ (lambda (port)
+ (format port
+ "insmod part_msdos~@
+ search --set=root --label gnu-disk-image~@
+ configfile /boot/grub/grub.cfg~%")))
+
+ (display "creating EFI firmware image...")
+ (install-efi grub-efi mount-point grub-config)
+ (display "done.\n")
+
+ (delete-file grub-config)
+ (umount mount-point)))
+
;; Register BOOTCFG as a GC root.
(register-bootcfg-root target bootcfg)