[bug#29409] [PATCH] system: vm: Do not add EFI partition on ARM system.

[m.othacehe@gmail.com]

From: Mathieu Othacehe <m.othacehe@gmail.com>

* gnu/system/vm.scm (qemu-img): Do not add EFI partition if we are targetting
  ARM.

UEFI support on u-boot is still experimental, so do not add EFI partition on
ARM for now.
---
 gnu/system/vm.scm | 45 +++++++++++++++++++++++++--------------------
 1 file changed, 25 insertions(+), 20 deletions(-)

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index a5fe48e..b7a0e45 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -29,6 +29,7 @@
   #:use-module (guix monads)
   #:use-module (guix records)
   #:use-module (guix modules)
+  #:use-module (guix utils)
 
   #:use-module ((gnu build vm)
                 #:select (qemu-command))
@@ -312,26 +313,30 @@ the image."
                                              graphs)))
                                     (- disk-image-size
                                        (* 50 (expt 2 20)))))
-                  (partitions (list (partition
-                                     (size root-size)
-                                     (label #$file-system-label)
-                                     (uuid #$(and=> file-system-uuid
-                                                    uuid-bytevector))
-                                     (file-system #$file-system-type)
-                                     (flags '(boot))
-                                     (initializer initialize))
-                                    ;; Append a small EFI System Partition for
-                                    ;; use with UEFI bootloaders.
-                                    (partition
-                                     ;; The standalone grub image is about 10MiB, but
-                                     ;; leave some room for custom or multiple images.
-                                     (size (* 40 (expt 2 20)))
-                                     (label "GNU-ESP")             ;cosmetic only
-                                     ;; Use "vfat" here since this property is used
-                                     ;; when mounting. The actual FAT-ness is based
-                                     ;; on filesystem size (16 in this case).
-                                     (file-system "vfat")
-                                     (flags '(esp))))))
+                  (partitions
+                   (append
+                    (list (partition
+                           (size root-size)
+                           (label #$file-system-label)
+                           (uuid #$(and=> file-system-uuid
+                                          uuid-bytevector))
+                           (file-system #$file-system-type)
+                           (flags '(boot))
+                           (initializer initialize)))
+                    ;; Append a small EFI System Partition for use with UEFI
+                    ;; bootloaders if we are not targetting ARM.
+                    (if #$(target-arm32?)
+                        '()
+                        (list (partition
+                               ;; The standalone grub image is about 10MiB, but
+                               ;; leave some room for custom or multiple images.
+                               (size (* 40 (expt 2 20)))
+                               (label "GNU-ESP")             ;cosmetic only
+                               ;; Use "vfat" here since this property is used
+                               ;; when mounting. The actual FAT-ness is based
+                               ;; on filesystem size (16 in this case).
+                               (file-system "vfat")
+                               (flags '(esp))))))))
              (initialize-hard-disk "/dev/vda"
                                    #:partitions partitions
                                    #:grub-efi #$grub-efi
-- 
2.7.4