When booting an arm64 kernel w/initrd using UEFI/grub, use of mem= will likely cut off part or all of the initrd. This leaves it outside the kernel linear map which leads to failure when unpacking. The x86 code has a similar need to relocate an initrd outside of mapped memory in some cases.
The current x86 code uses early_memremap() to copy the original initrd from unmapped to mapped RAM. This patchset creates a generic copy_from_early_mem() utility based on that x86 code and has arm64 use it to relocate the initrd if necessary. Mark Salter (2): mm: add utility for early copy from unmapped ram arm64: support initrd outside kernel linear map arch/arm64/kernel/setup.c | 55 +++++++++++++++++++++++++++++++++++++ include/asm-generic/early_ioremap.h | 6 ++++ mm/early_ioremap.c | 22 +++++++++++++++ 3 files changed, 83 insertions(+) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
