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x86: grub2: search for the "kernel" filesystem on all disks

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Previously, grub2 was hardcoded to always look on "hd0" for the
kernel.

This works well when the system only had a single disk.
But if there was a second disk/stick present, it may have look
on the wrong drive because of enumeration races.

This patch utilizes grub2 search function to look for a filesystem
with the label "kernel". This works thanks to existing setup in
scripts/gen_image_generic.sh. Which sets the "kernel" label on
both the fat and ext4 filesystem variants.

Signed-off-by: Jax Jiang <jax.jiang.007@gmail.com>
Suggested-by: Alberto Bursi <bobafetthotmail@gmail.com> (MX100 WA)
(word wrapped, slightly rewritten commit message, removed MX100 WA)
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
(cherry picked from commit 1050e66c8f7c67ab8b3d1895e2559f03baeb2345)
This commit is contained in:
Jax Jiang 2022-02-11 01:46:55 +08:00 committed by ZiMing Mo
parent 91bdfd5474
commit 891f3af4fb
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GPG Key ID: 1BED2E3A77AE5ECF
2 changed files with 5 additions and 5 deletions
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8
package/boot/grub2/Makefile
View File

@ -104,28 +104,28 @@ define Package/grub2/install
-O i386-pc \
-c $(PKG_BUILD_DIR)/grub-early.cfg \
-o $(STAGING_DIR_IMAGE)/grub2/gpt-core.img \
at_keyboard biosdisk boot chain configfile fat linux ls part_gpt reboot serial vga
at_keyboard biosdisk boot chain configfile fat linux ls part_gpt reboot search serial vga
$(STAGING_DIR_HOST)/bin/grub-mkimage \
-d $(PKG_BUILD_DIR)/grub-core \
-p /boot/grub \
-O i386-pc \
-c ./files/grub-early.cfg \
-o $(STAGING_DIR_IMAGE)/grub2/generic-core.img \
at_keyboard biosdisk boot chain configfile ext2 linux ls part_msdos reboot serial vga
at_keyboard biosdisk boot chain configfile ext2 linux ls part_msdos reboot search serial vga
$(STAGING_DIR_HOST)/bin/grub-mkimage \
-d $(PKG_BUILD_DIR)/grub-core \
-p /boot/grub \
-O i386-pc \
-c ./files/grub-early.cfg \
-o $(STAGING_DIR_IMAGE)/grub2/eltorito.img \
at_keyboard biosdisk boot chain configfile iso9660 linux ls part_msdos reboot serial test vga
at_keyboard biosdisk boot chain configfile iso9660 linux ls part_msdos reboot search serial test vga
$(STAGING_DIR_HOST)/bin/grub-mkimage \
-d $(PKG_BUILD_DIR)/grub-core \
-p /boot/grub \
-O i386-pc \
-c ./files/grub-early.cfg \
-o $(STAGING_DIR_IMAGE)/grub2/legacy-core.img \
biosdisk boot chain configfile ext2 linux ls part_msdos reboot serial vga
biosdisk boot chain configfile ext2 linux ls part_msdos reboot search serial vga
endef
define Package/grub2-efi/install

2
target/linux/x86/image/grub-efi.cfg
View File

@ -3,7 +3,7 @@
set default="0"
set timeout="@TIMEOUT@"
set root='(hd0,gpt1)'
search -l kernel -s root
menuentry "@TITLE@" {
linux /boot/vmlinuz @GPT_ROOTPART@ @CMDLINE@ noinitrd