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review.trustedfirmware.org / hafnium / hafnium.git / refs/heads/master
commitc0c0940775327c102dbc84c715a32e3068bd5e60[log] [tgz]
authorJ-Alves <joao.alves@arm.com>Tue Aug 26 16:55:23 2025 +0100
committerJ-Alves <joao.alves@arm.com>Tue Aug 26 16:55:23 2025 +0100
tree63f11ecfac6da4b3b38189927d09e712674a795f
parentaa32decc504391e3d78b4b4bb01fb576923f0fa6 [diff]
fix(static checks): clang-format failed with previous change

The change [1] introduce a static check failure with clang-format.

[1] https://review.trustedfirmware.org/c/hafnium/hafnium/+/42116

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Ie3fe5b3ccc5451e8146eb55819b85844a4e08d90
1 file changed
tree: 63f11ecfac6da4b3b38189927d09e712674a795f
  1. .vscode/
  2. build/
  3. docs/
  4. inc/
  5. kokoro/
  6. project/
  7. src/
  8. test/
  9. third_party/
  10. tools/
  11. vmlib/
  12. prebuilts
  13. .clang-format
  14. .clang-tidy
  15. .gitignore
  16. .gitmodules
  17. .gn
  18. .readthedocs.yaml
  19. AUTHORS
  20. BUILD.gn
  21. commitlint.config.js
  22. CONTRIBUTING.md
  23. dco.txt
  24. LICENSE
  25. Makefile
  26. navbar.md
  27. package-lock.json
  28. package.json
  29. pyproject.toml
  30. README.md
README.md

Hafnium

Hafnium is the Secure Partition Manager(SPM) reference implementation, following the Arm's Firmware Framework specification.

It leverages Arm's virtualization extensions in the secure world of Arm's A class of devices (feature introduced with Armv8.4 FEAT_SEL2) to allow multiple Trusted OSes or Applications to run concurrently, inside the Trusted Execution Environment, each running as a Secure Partition (SP). Its main goal is to control the system access given to Trusted OSes, and serve as a mediator to the rest of the system.

For example, it limits the memory use, and handles all system calls from Trusted OS. Thus the SPM can enforce spacial isolation, and enforce some level of access control, protecting other critical system resources such as: the secure monitor, the normal world software stack, the SPM itself and other SPs/Trusted Applications. Other important features are: secure interrupt handling, device assignment, inter-partition communication and with the Normal World Software stack, also known as Rich Execution Environment (REE).

The following diagram shows an overview of a typical aarch64-based system, and where Hafnium fits:

Hafnium Architecture

Get in touch and keep up-to-date at:

See feature requests and bugs through github.

Documentation

To find more about Hafnium, view the full documentation. It includes valuable resources such as: Getting Started guide, Threat Model, and other documentation.