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.
This commit is contained in:
Marius Bakke
parent
4d415f0c3c
commit
ecf5d53769
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@ -27,6 +27,7 @@
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#:use-module (gnu build linux-boot)
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#:use-module (gnu build install)
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#:use-module (guix records)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (srfi srfi-1)
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@ -315,12 +316,41 @@ SYSTEM-DIRECTORY is the name of the directory of the 'system' derivation."
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(mkdir-p directory)
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(symlink bootcfg (string-append directory "/bootcfg"))))
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(define (install-efi grub esp config-file)
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"Write a self-contained GRUB EFI loader to the mounted ESP using CONFIG-FILE."
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(let* ((system %host-type)
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;; Hard code the output location to a well-known path recognized by
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;; compliant firmware. See "3.5.1.1 Removable Media Boot Behaviour":
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;; http://www.uefi.org/sites/default/files/resources/UEFI%20Spec%202_6.pdf
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(grub-mkstandalone (string-append grub "/bin/grub-mkstandalone"))
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(efi-directory (string-append esp "/EFI/BOOT"))
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;; Map grub target names to boot file names.
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(efi-targets (cond ((string-prefix? "x86_64" system)
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'("x86_64-efi" . "BOOTX64.EFI"))
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((string-prefix? "i686" system)
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'("i386-efi" . "BOOTIA32.EFI"))
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((string-prefix? "armhf" system)
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'("arm-efi" . "BOOTARM.EFI"))
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((string-prefix? "aarch64" system)
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'("arm64-efi" . "BOOTAA64.EFI")))))
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;; grub-mkstandalone requires a TMPDIR to prepare the firmware image.
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(setenv "TMPDIR" esp)
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(mkdir-p efi-directory)
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(unless (zero? (system* grub-mkstandalone "-O" (car efi-targets)
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"-o" (string-append efi-directory "/"
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(cdr efi-targets))
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;; Graft the configuration file onto the image.
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(string-append "boot/grub/grub.cfg=" config-file)))
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(error "failed to create GRUB EFI image"))))
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(define* (initialize-hard-disk device
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#:key
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bootloader-package
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bootcfg
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bootcfg-location
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bootloader-installer
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(grub-efi #f)
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(partitions '()))
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"Initialize DEVICE as a disk containing all the <partition> objects listed
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in PARTITIONS, and using BOOTCFG as its bootloader configuration file.
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@ -332,8 +362,13 @@ passing it a directory name where it is mounted."
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"Return the first partition found with the boot flag set."
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(member 'boot (partition-flags partition)))
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(define (partition-esp? partition)
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"Return the first EFI System Partition."
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(member 'esp (partition-flags partition)))
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(let* ((partitions (initialize-partition-table device partitions))
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(root (find partition-bootable? partitions))
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(esp (find partition-esp? partitions))
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(target "/fs"))
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(unless root
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(error "no bootable partition specified" partitions))
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@ -345,8 +380,34 @@ passing it a directory name where it is mounted."
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(mount (partition-device root) target (partition-file-system root))
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(install-boot-config bootcfg bootcfg-location target)
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(when bootloader-installer
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(display "installing bootloader...\n")
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(bootloader-installer bootloader-package device target))
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(when esp
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;; Mount the ESP somewhere and install GRUB UEFI image.
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(let ((mount-point (string-append target "/boot/efi"))
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(grub-config (string-append target "/tmp/grub-standalone.cfg")))
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(display "mounting EFI system partition...\n")
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(mkdir-p mount-point)
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(mount (partition-device esp) mount-point
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(partition-file-system esp))
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;; Create a tiny configuration file telling the embedded grub
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;; where to load the real thing.
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(call-with-output-file grub-config
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(lambda (port)
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(format port
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"insmod part_msdos~@
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search --set=root --label gnu-disk-image~@
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configfile /boot/grub/grub.cfg~%")))
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(display "creating EFI firmware image...")
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(install-efi grub-efi mount-point grub-config)
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(display "done.\n")
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(delete-file grub-config)
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(umount mount-point)))
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;; Register BOOTCFG as a GC root.
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(register-bootcfg-root target bootcfg)
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@ -3,6 +3,7 @@
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;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
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;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
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;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -228,13 +229,26 @@ the image."
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#:system-directory #$os-drv))
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(partitions (list (partition
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(size #$(- disk-image-size
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(* 10 (expt 2 20))))
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(* 50 (expt 2 20))))
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(label #$file-system-label)
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(file-system #$file-system-type)
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(flags '(boot))
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(initializer initialize)))))
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(initializer initialize))
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;; Append a small EFI System Partition for
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;; use with UEFI bootloaders.
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(partition
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;; The standalone grub image is about 10MiB, but
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;; leave some room for custom or multiple images.
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(size (* 40 (expt 2 20)))
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(label "GNU-ESP") ;cosmetic only
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;; Use "vfat" here since this property is used
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;; when mounting. The actual FAT-ness is based
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;; on filesystem size (16 in this case).
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(file-system "vfat")
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(flags '(esp))))))
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(initialize-hard-disk "/dev/vda"
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#:partitions partitions
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#:grub-efi #$grub-efi
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#:bootloader-package
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#$(bootloader-package bootloader)
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#:bootcfg #$bootcfg-drv
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