diff options
| -rw-r--r-- | gnu/build/vm.scm | 60 | ||||
| -rw-r--r-- | gnu/system/vm.scm | 20 |
2 files changed, 77 insertions, 3 deletions
diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm index ef8dcc315f..7147ce1993 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) @@ -315,9 +316,38 @@ SYSTEM-DIRECTORY is the name of the directory of the 'system' derivation." (mkdir-p directory) (symlink bootcfg (string-append directory "/grub.cfg")))) +(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 grub.cfg + (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. @@ -329,8 +359,13 @@ 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)) @@ -342,6 +377,31 @@ passing it a directory name where it is mounted." (mount (partition-device root) target (partition-file-system root)) (install-grub grub.cfg 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 GRUB.CFG as a GC root. (register-grub.cfg-root target grub.cfg) diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm index 2110ce68bb..c40bb4c436 100644 --- a/gnu/system/vm.scm +++ b/gnu/system/vm.scm @@ -3,6 +3,7 @@ ;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org> ;;; Copyright © 2016 Leo Famulari <leo@famulari.name> ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com> +;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com> ;;; ;;; This file is part of GNU Guix. ;;; @@ -226,14 +227,27 @@ the image." #:system-directory #$os-derivation)) (partitions (list (partition (size #$(- disk-image-size - (* 10 (expt 2 20)))) + (* 50 (expt 2 20)))) (label #$file-system-label) (file-system #$file-system-type) (flags '(boot)) - (initializer initialize))))) + (initializer initialize)) + ;; Append a small EFI System Partition for + ;; use with UEFI bootloaders. + (partition + ;; The standalone grub image is about 10MiB, but + ;; leave some room for custom or multiple images. + (size (* 40 (expt 2 20))) + (label "GNU-ESP") ;cosmetic only + ;; Use "vfat" here since this property is used + ;; when mounting. The actual FAT-ness is based + ;; on filesystem size (16 in this case). + (file-system "vfat") + (flags '(esp)))))) (initialize-hard-disk "/dev/vda" #:partitions partitions - #:grub.cfg #$grub-configuration) + #:grub.cfg #$grub-configuration + #:grub-efi #$grub-efi) (reboot))))) #:system system #:make-disk-image? #t |