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grub: add option to configure the list of supported filesystems

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Grub can be configured to enable or disable the filesystems supported
in the stage 2. In addition, there are filesystem specific stage
1.5. In order to save space and build time, we provide a new option
that allows to give a space-separated list of filesystems that Grub
should support.

We default to support FAT and ext2, since most of the other
filesystems are fairly unlikely to be used.

We use this option to:

 1) Pass --enable-<fs> or --disable-<fs>, which enables/disables the
    support of <fs> in Grub stage 2.

 2) Install only the stage 1.5 that correspond to the selected
    filesystems.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni 2013-11-11 17:47:33 +01:00 committed by Peter Korsgaard
parent 741740cee6
commit 1cece2813b
2 changed files with 24 additions and 1 deletions
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8
boot/grub/Config.in
View File

@ -15,6 +15,14 @@ config BR2_TARGET_GRUB_SPLASH
A splashimage is a 14-color indexed .xpm picture which
is displayed as background for the grub menu.
config BR2_TARGET_GRUB_FS_SUPPORT
string "Filesystem to support"
default "ext2fs fat"
help
Space separated list of filesystems to support. Possible
values are ext2fs, fat, ffs, ufs2, minix, reiserfs, vstafs,
jfs, xfs and iso9660.
config BR2_TARGET_GRUB_DISKLESS
bool "diskless support"
help

17
boot/grub/grub.mk
View File

@ -46,6 +46,19 @@ GRUB_CONFIG-$(BR2_TARGET_GRUB_undi) += --enable-undi
GRUB_CONFIG-$(BR2_TARGET_GRUB_via_rhine) += --enable-via-rhine
GRUB_CONFIG-$(BR2_TARGET_GRUB_w89c840) += --enable-w89c840
GRUB_POSSIBLE_FILESYSTEMS = ext2fs fat ffs ufs2 minix \
reiserfs vstafs jfs xfs iso9660
GRUB_SELECTED_FILESYSTEMS = $(call qstrip,$(BR2_TARGET_GRUB_FS_SUPPORT))
# Calculate the list of stage 1.5 files to install. They are prefixed
# by the filesystem name, except for ext2fs, where the stage 1.5 is
# prefixed by e2fs.
GRUB_STAGE_1_5_TO_INSTALL = $(subst ext2fs,e2fs,$(GRUB_SELECTED_FILESYSTEMS))
GRUB_CONFIG-y = \
$(foreach fs,$(GRUB_POSSIBLE_FILESYSTEMS),\
$(if $(filter $(fs),$(GRUB_SELECTED_FILESYSTEMS)),--enable-$(fs),--disable-$(fs)))
define GRUB_DEBIAN_PATCHES
# Apply the patches from the Debian patch
(cd $(@D) ; for f in `cat debian/patches/00list | grep -v ^#` ; do \
@ -79,7 +92,9 @@ define GRUB_INSTALL_TARGET_CMDS
install -m 0755 -D $(@D)/grub/grub $(HOST_DIR)/sbin/grub
mkdir -p $(TARGET_DIR)/boot/grub
cp $(@D)/stage1/stage1 $(TARGET_DIR)/boot/grub
cp $(@D)/stage2/*1_5 $(TARGET_DIR)/boot/grub
for f in $(GRUB_STAGE_1_5_TO_INSTALL) ; do \
cp $(@D)/stage2/$${f}_stage1_5 $(TARGET_DIR)/boot/grub ; \
done
cp $(@D)/stage2/stage2 $(TARGET_DIR)/boot/grub
cp boot/grub/menu.lst $(TARGET_DIR)/boot/grub
$(GRUB_INSTALL_SPLASH)