From: Daniel Golle <daniel@makrotopia.org>
To: Rasmus Villemoes <ravi@prevas.dk>
Cc: Tom Rini <trini@konsulko.com>, Simon Glass <sjg@chromium.org>,
Quentin Schulz <quentin.schulz@cherry.de>,
Kory Maincent <kory.maincent@bootlin.com>,
Mattijs Korpershoek <mkorpershoek@kernel.org>,
Peng Fan <peng.fan@nxp.com>,
Heinrich Schuchardt <xypron.glpk@gmx.de>,
Martin Schwan <m.schwan@phytec.de>, Anshul Dalal <anshuld@ti.com>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Sughosh Ganu <sughosh.ganu@arm.com>,
Aristo Chen <jj251510319013@gmail.com>,
Ludwig Nussel <ludwig.nussel@siemens.com>,
Benjamin ROBIN <dev@benjarobin.fr>,
Marek Vasut <marek.vasut+renesas@mailbox.org>,
James Hilliard <james.hilliard1@gmail.com>,
Wolfgang Wallner <wolfgang.wallner@at.abb.com>,
Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
David Lechner <dlechner@baylibre.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Mayuresh Chitale <mchitale@ventanamicro.com>,
Jonas Karlman <jonas@kwiboo.se>,
Shiji Yang <yangshiji66@outlook.com>,
Francois Berder <fberder@outlook.fr>,
u-boot@lists.denx.de
Subject: Re: [PATCH v2 0/7] fit: dm-verity support
Date: Thu, 23 Apr 2026 14:20:09 +0100 [thread overview]
Message-ID: <aeocicfRVu7NuC6T@makrotopia.org> (raw)
In-Reply-To: <87wlxxltnc.fsf@prevas.dk>
On Thu, Apr 23, 2026 at 02:59:19PM +0200, Rasmus Villemoes wrote:
> On Thu, Apr 16 2026, Daniel Golle <daniel@makrotopia.org> wrote:
>
> > This series adds dm-verity support to U-Boot's FIT image infrastructure.
> > It is the first logical subset of the larger OpenWrt boot method series
> > posted as an RFC in February 2026 [1], extracted here for independent
> > review and merging.
> >
> > OpenWrt's firmware model embeds a read-only squashfs or erofs root
> > filesystem directly inside a uImage.FIT container as a FILESYSTEM-type
> > loadable FIT image. At boot the kernel maps this sub-image directly from
> > the underlying block device via the fitblk driver (/dev/fit0, /dev/fit1,
>
> Can you show me where that fitblk driver lives, because I can't find
> anything like that in the linux source code. Grepping for 'fitblk' or
> 'dev/fit' turns up nothing.
The driver is currently downstream, but going to be (re-)submitted upsteam.
See below for more.
>
> > ...), the goal is that the bootloader never even copies it to RAM.
>
> Hm, how is that achieved? I.e., how do you load and boot the FIT image
> without loading that part, but still reading in e.g. the kernel?
The next series after this is going to suggest a way for on-demand
loading only the actually necessary FIT images from a storage backend.
See
https://github.com/u-boot/u-boot/pull/870
And see here for an end-to-end demo:
https://github.com/openwrt/openwrt/pull/22177
next prev parent reply other threads:[~2026-04-25 19:15 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-16 1:46 [PATCH v2 0/7] fit: dm-verity support Daniel Golle
2026-04-16 1:46 ` [PATCH v2 1/7] image: fit: add dm-verity property name constants Daniel Golle
2026-04-21 15:03 ` Tom Rini
2026-04-16 1:46 ` [PATCH v2 2/7] boot: fit: support generating DM verity cmdline parameters Daniel Golle
2026-04-16 19:37 ` Simon Glass
2026-04-16 1:46 ` [PATCH v2 3/7] include: hexdump: make hex2bin() usable from host tools Daniel Golle
2026-04-16 11:00 ` Heinrich Schuchardt
2026-04-24 17:31 ` Daniel Golle
2026-04-16 19:37 ` Simon Glass
2026-04-16 1:46 ` [PATCH v2 4/7] tools: mkimage: add dm-verity Merkle-tree generation Daniel Golle
2026-04-16 19:36 ` Simon Glass
2026-04-16 1:46 ` [PATCH v2 5/7] doc: fit: add dm-verity boot parameter documentation Daniel Golle
2026-04-16 19:38 ` Simon Glass
2026-04-16 1:47 ` [PATCH v2 6/7] test: boot: add runtime unit test for fit_verity_build_cmdline() Daniel Golle
2026-04-16 19:36 ` Simon Glass
2026-04-16 23:25 ` Daniel Golle
2026-04-16 23:59 ` Simon Glass
2026-04-16 1:47 ` [PATCH v2 7/7] test: py: add mkimage dm-verity round-trip test Daniel Golle
2026-04-16 19:36 ` Simon Glass
2026-04-16 22:58 ` Daniel Golle
2026-04-16 23:59 ` Simon Glass
[not found] ` <87wlxxltnc.fsf@prevas.dk>
2026-04-23 13:20 ` Daniel Golle [this message]
2026-04-26 16:20 ` [PATCH v2 0/7] fit: dm-verity support Marek Vasut
2026-04-26 16:32 ` Daniel Golle
2026-05-07 15:38 ` Simon Glass
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