linux-kernel - [PATCH v4 0/2] Meson: R/W support for pages used by boot ROM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240410185409.2635622-1-avkrasnov@salutedevices.com>
Date: Wed, 10 Apr 2024 21:54:07 +0300
From: Arseniy Krasnov <avkrasnov@...utedevices.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>, Richard Weinberger
	<richard@....at>, Vignesh Raghavendra <vigneshr@...com>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Neil
 Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>,
	Jerome Brunet <jbrunet@...libre.com>, Martin Blumenstingl
	<martin.blumenstingl@...glemail.com>
CC: <linux-mtd@...ts.infradead.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-amlogic@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <oxffffaa@...il.com>,
	<kernel@...rdevices.ru>, Arseniy Krasnov <avkrasnov@...utedevices.com>
Subject: [PATCH v4 0/2] Meson: R/W support for pages used by boot ROM

Amlogic's boot ROM code needs that some pages on NAND must be written
in special "short" ECC mode with scrambling enabled. Such pages:
1) Contain some metadata about hardware.
2) Located with some interval starting from 0 offset, until some
   specified offset. Interval and second offset are set in the
   device tree.

This patchset adds R/W support for such pages. To enable it we can setup
it in dts:

    nand-is-boot-medium;
    amlogic,boot-page-last = <1024>;
    amlogic,boot-page-step = <128>;

It means that each 128th page in range 0 to 1024 pages will be accessed
in special mode ("short" ECC + scrambling). In practice this feature is
needed when we want to update first block of NAND - driver will enable
required mode by itself using value from device tree.

Changelog:
 v1 -> v2:
  * Rename 'meson,boot-page-XXX' -> 'amlogic,boot-page-XXX'.
  * Add words that 'amlogic,boot-page-step' is measured in pages.
  * Remove words that 'amlogic,boot-page-XXX' depends on 'nand-is-boot-medium'.
  * Make both 'amlogic,boot-page-XXX' depend on each other also, in
    addition to 'nand-is-boot-medium' dependency.
 v2 -> v3:
  * Add quotes to 0001 in dependencies. This fixes 'make dt_binding_check'
    warning.
 v3 -> v4:
  * Rename 'amlogic,boot-page-last' to 'amlogic,boot-pages'.

Arseniy Krasnov (2):
  dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code
  mtd: rawnand: meson: support R/W mode for boot ROM

 .../bindings/mtd/amlogic,meson-nand.yaml      | 14 +++
 drivers/mtd/nand/raw/meson_nand.c             | 88 +++++++++++++------
 2 files changed, 73 insertions(+), 29 deletions(-)

-- 
2.35.0