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Glenn Washburn
db1d70f2f3
The EFI chainloader checks that a device path can be created for the $root device before allowing chainloading to a given file. This is probably to ensure that the given file can be accessed and loaded by the firmware. However, since GRUB is loading the image itself, the firmware need not be able to access the file location of the image. So remove this check. Also, this fixes an issue where chainloading an image file on a location that is accessible by the firmware, e.g. (hd0,1)/efi/boot.efi, would fail when root is a location inaccessible by the firmware, e.g. memdisk. Use GRUB_EFI_BYTES_TO_PAGES() instead of doing the calculation explicitly. Add comment noting the section where the load options for the chainloaded EFI application is constructed. Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>