Messages in this thread | | | Date | Tue, 28 Jul 2015 15:59:06 +0100 | From | Mark Rutland <> | Subject | Re: [PATCH 0/2] arm64: support initrd outside of mapped RAM |
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Hi Mark,
As a heads-up, it looks like you missed a space when sending this; Arnd and Ard got merged into:
"Arnd Bergmann <arnd@arndb.de>--cc=Ard Biesheuvel" <ard.biesheuvel@linaro.org>
I've corrected that for this reply.
On Tue, Jul 28, 2015 at 03:32:39PM +0100, Mark Salter wrote: > 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.
This sounds like a sane idea to me.
> 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(+)
Any reason for not moving x86 over to the new generic version?
Mark.
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