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Re: [Qemu-devel] [PATCH v2] hw/arm/boot: take Linux/arm64 TEXT_OFFSET he

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH v2] hw/arm/boot: take Linux/arm64 TEXT_OFFSET header field into account
Date: Mon, 20 Mar 2017 11:13:29 +0000

On 13 March 2017 at 14:17, Ard Biesheuvel <address@hidden> wrote:
> The arm64 boot protocol stipulates that the kernel must be loaded
> TEXT_OFFSET bytes beyond a 2 MB aligned base address, where TEXT_OFFSET
> could be any 4 KB multiple between 0 and 2 MB, and whose value can be
> found in the header of the Image file.
> So after attempts to load the arm64 kernel image as an ELF file or as a
> U-Boot image have failed (both of which have their own way of specifying
> the load offset), try to determine the TEXT_OFFSET from the image after
> loading it but before mapping it as a ROM mapping into the guest address
> space.
> Signed-off-by: Ard Biesheuvel <address@hidden>
> ---
> v2: split off AArch64 specific loader logic regarding gzipped/raw and variable
>     load offset into a separate helper function, which removes the need for
>     loading the image twice

Reviewed-by: Peter Maydell <address@hidden>

Since we're due to tag rc1 tomorrow and this is kind of on the
border between bugfix and new feature, I think I'd rather
defer it to 2.10, unless you have a strong view that it should
go into 2.9.

-- PMM

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