grub2: add a tip to create disk image w/o root permission

[Thomas: minor fixes/improvements.]

Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/boot/grub2/Config.in b/boot/grub2/Config.in
index a27c07ab7a380b4c8e01ef37097a7e0d0ec4a204..4e0d1d6a502e0db276e3ab2d6a359f842809ad38 100644 (file)
--- a/boot/grub2/Config.in
+++ b/boot/grub2/Config.in
@@ -39,7 +39,30 @@ config BR2_TARGET_GRUB2
             sudo losetup -d /dev/loop0
          7. Your disk.img is ready!
 
-         To test your BIOS image in Qemu:
+         Using genimage
+         --------------
+
+         If you use genimage to generate your complete image,
+         installing Grub can be tricky. Here is how to achieve Grub's
+         installation with genimage:
+
+         partition boot {
+             in-partition-table = "no"
+             image = "path_to_boot.img"
+             offset = 0
+             size = 512
+         }
+         partition grub {
+             in-partition-table = "no"
+             image = "path_to_grub.img"
+             offset = 512
+         }
+
+         The result is not byte to byte identical to what
+         grub-bios-setup does but it works anyway.
+
+         To test your BIOS image in Qemu
+         -------------------------------
 
          qemu-system-{i386,x86-64} -hda disk.img
 
@@ -73,7 +96,8 @@ config BR2_TARGET_GRUB2
             sudo losetup -d /dev/loop0
          7. Your disk.img is ready!
 
-         To test your EFI image in Qemu:
+         To test your EFI image in Qemu
+         ------------------------------
 
          1. Download the EFI BIOS for Qemu
             Version IA32 or X64 depending on the chosen Grub2