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OpenEmbedded layer with security-related metadata for Toradex SoMs

This layer contains metadata to enable security features when building a Linux system for Toradex SoMs.

For more information on available Toradex SoMs, please visit:

https://www.toradex.com/computer-on-modules

Layer dependencies

This layer depends on:

URI: git://git.openembedded.org/openembedded-core
layers: meta
branch: kirkstone
revision: HEAD

URI: git://git.yoctoproject.org/meta-security
branch: kirkstone
revision: HEAD

Layer recommendations

This layer recommends:

URI: git://git.toradex.com/meta-toradex-nxp.git
branch: kirkstone
revision: HEAD

URI: git://git.toradex.com/meta-toradex-ti.git
branch: kirkstone
revision: HEAD

Supported features and SoMs

This layer supports the following security features:

  • Secure boot
    • Bootloader signature checking.
    • U-Boot hardening.
    • FIT image signature checking (kernel, DTBs and ramdisk).
    • Rootfs signature checking via dm-verity.
  • Data-at-rest encryption
    • Encryption key management via the Trusted Keys kernel subsystem
    • Block device encryption with dm-crypt
  • TEE (Trusted Execution Environment)
    • Support for running OP-TEE

For more information on the available features, please check the corresponding documentation:

Documentation Description
docs/README-secure-boot.md General documentation about the secure boot feature
docs/README-secure-boot-imx.md Details on the secure boot implementation for NXP iMX based SoMs
docs/README-secure-boot-k3.md Details on the secure boot implementation for TI K3 based SoMs (e.g. AM62)
docs/README-encryption.md General documentation about the data-at-rest encryption feature
docs/README-optee.md Documentation on how to run a Trusted Execution Environment (OP-TEE) together with the Linux kernel
docs/README-data-partition.md Documentation on how to create an additional partition for storing persistent data

This layer only works on Toradex Embedded Linux BSP 6.3.0 and newer releases.

License

All metadata is MIT licensed unless otherwise stated. Source code and binaries included in tree for individual recipes are under the LICENSE stated in each recipe (.bb file) unless otherwise stated.

This README document is Copyright (C) 2024 Toradex AG.

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