I am experimenting with UEFI boot for LEDE x86_64 image. Currently, lede-x86_64-vmlinuz boots fine on UEFI - both on MBR and GPT disk, by chainloading via grub or directly launching the kernel via EFI shell.
There is no support in the kernel for EFI framebuffer, so a serial interface is needed to interact with the system. I have reported this on FS#515. For EFI boot to work, FAT16/FAT32 formatted boot partition is needed. It seems that the imagebuilder doesn't include a tool to create FAT formatted partition (dosfstools). GRUB should be called with argument '--target=x86_64-efi' in the image generation phase. Important grub modules to include for EFI boots are part_gpt (for gpt partitioned disk support), efi_gop (for EFI graphics output protocol framebuffer), efi_uga (for EFI universal graphic adapter framebuffer) in addition to GRUB2_MODULES in the image Makefile. I think a new grub2-efi package is needed for this to work. A new subtarget for x86_64 efi is probably needed. This new subtarget will have a combined image with a FAT32/FAT16 EFI system partition and another ext4 rootfs partition. _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
