Re: [Xen-devel] [PATCH v4] xen: arm: Update arm64 image header

[Julien Grall <julien.grall@xxxxxxx>]

Hi Dirk,

On 27/06/16 08:53, Dirk Behme wrote:
> With the Linux kernel commits
>
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/Documentation/arm64/booting.txt?id=4370eec05a887b0cd4392cd5dc5b2713174745c0
>
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/Documentation/arm64/booting.txt?id=a2c1d73b94ed49f5fac12e95052d7b140783f800
>
> the arm64 image header changed. While the size of the header isn't changed,
> some members have changed their usage.
>
> Update Xen to this updated image header.
>
> The main changes are that the first magic is gone and that there is an
> image size, now.
>
> In case we read a size != 0, let's use this image size, now. This does
> allow us to check if the kernel Image is larger than the size given in
> the device tree, too.
>
> Additionally, add an error message if the magic is not found. This might
> be the case with kernel's < 3.12 prior to
>
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4370eec05a887b0cd4392cd5dc5b2713174745c0
>
> which introduced the second magic.
>
> This is acceptable as the support of Xen for ARM64 in Linux has been added
> in Linux 3.11 and the number of boards supported by Linux 3.11 on ARM64 is
> very limited: ARM models and X-gene. And for the latter it was an early
> support with only the serial and timer upstreamed.
>
> Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx>
Reviewed-by: Julien Grall <julien.grall@xxxxxxx>

Regards,

--
Julien Grall

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