[PATCH 00/10] Add barebox TLV infrastructure

[Ahmad Fatoum]

Hello Sascha,

Could the first three patches that are applicable on their own be applied?

Thanks,

On 4/11/25 09:40, Ahmad Fatoum wrote:
> barebox TLV is a system to store and retrieve a device's (read-only)
> meta-data from non-volatile memory.
> It is intended to handle information that are usually only set in
> the factory - like serial number, MAC-addresses, analog calibration
> data, etc.
> Data is stored in a tag-length-value format (hence the name) and read
> from non-volatile memory during startup.
> 
> Unpacked values are fixed up into the devicetree ``chosen``-node
> for consumption by the operating system.
> 
> This system has already been deployed in the field for a couple of years
> now on the LXA TAC. The feature is given a generic name though, because
> it's hoped it will be useful to a more general audience.
> 
> Nowadays, this could be implemented as a NVMEM layout in Linux.
> The benefit of doing it in barebox is that, when signing is added
> in the future, we preclude an attacker from showing barebox
> and Linux different content.
> 
> Nevertheless, NVMEM layout infrastructure in barebox could be
> useful, but our NVMEM support needs an overhaul to support layouts,
> so fixed-partitions is the only supported binding for now.
> 
> Ahmad Fatoum (8):
>   net: factor out eth_of_get_fixup_node
>   net: export list of registered ethernet addresses
>   common: add optional systemd.hostname generation
>   common: add barebox TLV support
>   commands: add TLV debugging command
>   scripts: add bareboxtlv host/target tool
>   boards: add decoder for LXA TLV v1 format
>   ARM: stm32mp: lxa: enable TLV support for TAC & FairyTux2
> 
> Chris Fiege (2):
>   scripts: Add Barebox TLV Generator Tooling
>   doc: Add User-Documentation for Barebox TLV
> 
>  .../bindings/nvmem/barebox,tlv.yaml           |  60 ++++
>  Documentation/user/barebox-tlv.rst            |  93 +++++
>  Documentation/user/user-manual.rst            |   1 +
>  arch/arm/boards/lxa-fairytux2/board.c         |   8 +
>  arch/arm/boards/lxa-tac/board.c               |   8 +
>  .../dts/stm32mp153c-lxa-fairytux2-gen2.dts    |   1 +
>  arch/arm/dts/stm32mp153c-lxa-fairytux2.dtsi   |   1 +
>  arch/arm/dts/stm32mp15xc-lxa-tac.dtsi         |   2 +
>  arch/arm/mach-stm32mp/Kconfig                 |   2 +
>  commands/Kconfig                              |  12 +
>  commands/Makefile                             |   1 +
>  commands/tlv.c                                |  55 +++
>  common/Kconfig                                |  34 ++
>  common/Makefile                               |   1 +
>  common/boards/Kconfig                         |   5 +
>  common/boards/Makefile                        |   1 +
>  common/boards/lxa/Makefile                    |   2 +
>  common/boards/lxa/factory-data.c              | 132 +++++++
>  common/bootm.c                                |   9 +-
>  common/tlv/Makefile                           |   4 +
>  common/tlv/barebox.c                          | 183 ++++++++++
>  common/tlv/bus.c                              | 133 ++++++++
>  common/tlv/drv.c                              |  49 +++
>  common/tlv/parser.c                           | 211 ++++++++++++
>  common/tlv/register.c                         |  94 +++++
>  include/net.h                                 |  21 ++
>  include/string.h                              |   7 +
>  include/tlv/format.h                          |  72 ++++
>  include/tlv/tlv.h                             |  99 ++++++
>  lib/string.c                                  |  21 ++
>  net/eth.c                                     |  40 +--
>  scripts/.gitignore                            |   2 +
>  scripts/Makefile                              |   2 +
>  .../bareboxtlv-generator.py                   | 321 ++++++++++++++++++
>  .../bareboxtlv-generator/data-example.yaml    |  12 +
>  scripts/bareboxtlv-generator/requirements.txt |   2 +
>  .../bareboxtlv-generator/schema-example.yaml  |  48 +++
>  scripts/bareboxtlv-target.c                   |   1 +
>  scripts/bareboxtlv.c                          | 183 ++++++++++
>  scripts/include/asm/unaligned.h               |  21 ++
>  scripts/include/linux/build_bug.h             |   8 +
>  scripts/include/linux/stringify.h             |  14 +
>  test/self/Kconfig                             |   7 +
>  test/self/Makefile                            |   1 +
>  test/self/tlv.c                               |  89 +++++
>  test/self/tlv.dts                             |  27 ++
>  46 files changed, 2080 insertions(+), 20 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/nvmem/barebox,tlv.yaml
>  create mode 100644 Documentation/user/barebox-tlv.rst
>  create mode 100644 commands/tlv.c
>  create mode 100644 common/boards/lxa/Makefile
>  create mode 100644 common/boards/lxa/factory-data.c
>  create mode 100644 common/tlv/Makefile
>  create mode 100644 common/tlv/barebox.c
>  create mode 100644 common/tlv/bus.c
>  create mode 100644 common/tlv/drv.c
>  create mode 100644 common/tlv/parser.c
>  create mode 100644 common/tlv/register.c
>  create mode 100644 include/tlv/format.h
>  create mode 100644 include/tlv/tlv.h
>  create mode 100755 scripts/bareboxtlv-generator/bareboxtlv-generator.py
>  create mode 100644 scripts/bareboxtlv-generator/data-example.yaml
>  create mode 100644 scripts/bareboxtlv-generator/requirements.txt
>  create mode 100644 scripts/bareboxtlv-generator/schema-example.yaml
>  create mode 100644 scripts/bareboxtlv-target.c
>  create mode 100644 scripts/bareboxtlv.c
>  create mode 100644 scripts/include/asm/unaligned.h
>  create mode 100644 scripts/include/linux/build_bug.h
>  create mode 100644 scripts/include/linux/stringify.h
>  create mode 100644 test/self/tlv.c
>  create mode 100644 test/self/tlv.dts
> 

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