On Wed, Apr 22, 2020 at 11:39:39AM +0200, Ard Biesheuvel wrote: > On Mon, 13 Apr 2020 at 17:55, Ard Biesheuvel <ardb@xxxxxxxxxx> wrote: > > > > The arm64 kernel's segment alignment is fixed at 64 KB for any page > > size, and relocatable kernels are able to fix up any misalignment of > > the kernel image with respect to the 2 MB section alignment that is > > mandated by the arm64 boot protocol. > > > > Let's increase the PE/COFF section alignment to the same value, so that > > kernels loaded by the UEFI PE/COFF loader are guaranteed to end up at > > an address that doesn't require any reallocation to be done if the > > kernel is relocatable. > > > > Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx> > > --- > > arch/arm64/kernel/efi-header.S | 2 +- > > arch/arm64/kernel/vmlinux.lds.S | 3 ++- > > 2 files changed, 3 insertions(+), 2 deletions(-) > > > > Catalin, Will: any thoughts whether this should go via the arm64 tree > or the EFI tree? It is part of a change on the EFI side to stop > needlessly copying the kernel around before boot, but this particular > change could go through either tree, as it is not build time > dependency for the EFI changes, nor does it have a boot time impact > beyond making it more likely that the copy can be elided (but the code > still needs to deal with the possibility that it cannot be elided in > any case) I've queued this one in the arm64 tree for 5.8. Should appear on for-next/misc in the next day or so. Thanks, Will
