On Thu, 26 Mar 2020 17:59:03 +0100 Ard Biesheuvel <ardb@xxxxxxxxxx> wrote: > Update the relocation logic in the EFI stub for arm64 so it runs the > kernel in place if it was loaded by firmware at an address which allows > doing so. Then, update the PE/COFF header metadata and increase the > section alignment to force the UEFI image loader to honour the minimal > alignment requirement imposed by the kernel proper. > > Ard Biesheuvel (2): > efi/libstub/arm64: avoid copying the kernel unnecessarily > efi/arm64: increase the PE/COFF alignment so the kernel can run in > place > > arch/arm64/kernel/efi-header.S | 2 +- > arch/arm64/kernel/image-vars.h | 7 +++++++ > drivers/firmware/efi/libstub/arm64-stub.c | 9 +++++++++ > 3 files changed, 17 insertions(+), 1 deletion(-) > Hi Ard. Seems sensible to me so I decided to give it a quick test. As things stand RELOCATABLE is only selectable by selecting RANDOMIZE_BASE. Probably want to be able to configure it separately (needs some help text, or a specific option to select CONFIG_RELOCATABLE). Otherwise, superficially seems to work good for me doing a boot via pxe/grub on a Kunpeng 920 with some prints added to make sure it's taking the right paths. Thanks, Jonathan
