linux-kernel - Re: [PATCH 1/2] scripts/make_fit: Support an initial ramdisk

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Message-ID: <9cafbc70-7235-4e49-928c-4d68a57b7d46@pengutronix.de>
Date: Mon, 22 Sep 2025 09:14:55 +0200
From: Ahmad Fatoum <a.fatoum@...gutronix.de>
To: Simon Glass <sjg@...omium.org>, linux-arm-kernel@...ts.infradead.org
Cc: Chen-Yu Tsai <wenst@...omium.org>, J . Neuschäfer
 <j.ne@...teo.net>, Masahiro Yamada <masahiroy@...nel.org>,
 Tom Rini <trini@...sulko.com>, linux-kernel@...r.kernel.org,
 Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH 1/2] scripts/make_fit: Support an initial ramdisk

Hello Simon,

On 19.09.25 23:09, Simon Glass wrote:
> FIT (Flat Image Tree) allows an ramdisk to be included in each
> configuration. Add support for this to the script.
> 
> This feature is not available via 'make image.fit' since the ramdisk
> likely needs to be built separately anyway, e.g. using modules from
> the kernel build.

AFAIK the kernel supports multiple concatenated separately compressed
initramfs just fine, so it may still be useful to add a target which
builds a cpio with all modules inside and the rest can be then
concatenated.

What do you think?

> +        fsw.property_string('compression', args.compress)

compression should be none as the kernel would take of decompression.

Both U-Boot and barebox should warn about ramdisk compression property
that is != "none".

Cheers,
Ahmad

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