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grub_install: Use hd0,gpt1 as a hint when searching for root

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In the context of load.cfg in the memdisk, root is set to memdisk, so
passing it as a hint to search is not helpful. While we don't know for
sure whether hd0 is the boot disk, it's a safe hint for most situations.

Signed-off-by: Jeremi Piotrowski <jpiotrowski@microsoft.com>
This commit is contained in:
Jeremi Piotrowski 2024-04-24 10:31:12 +00:00
parent 8e46d15150
commit e78a59cc65
1 changed files with 3 additions and 2 deletions
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5
build_library/grub_install.sh
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@ -141,10 +141,11 @@ done
info "Generating ${GRUB_DIR}/load.cfg"
# Include a small initial config in the core image to search for the ESP
# by filesystem ID in case the platform doesn't provide the boot disk.
# The existing $root value is given as a hint so it is searched first.
# $root points to memdisk here so instead use hd0,gpt1 as a hint so it is
# searched first.
ESP_FSID=$(sudo grub-probe -t fs_uuid -d "${LOOP_DEV}p1")
sudo_clobber "${ESP_DIR}/${GRUB_DIR}/load.cfg" <<EOF
search.fs_uuid ${ESP_FSID} root \$root
search.fs_uuid ${ESP_FSID} root hd0,gpt1
set prefix=(memdisk)
set
EOF