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review.trustedfirmware.org / hafnium / hafnium.git / 337dbdfa04ee96084d3826f0157d4ae1e53ee8bb
commit337dbdfa04ee96084d3826f0157d4ae1e53ee8bb[log] [tgz]
authorKathleen Capella <kathleen.capella@arm.com>Tue Aug 20 14:39:42 2024 -0400
committerKathleen Capella <kathleen.capella@arm.com>Mon Sep 16 11:56:56 2024 -0400
treead0a45f307a6fc977879b0bbd8886c96876823c2
parent7253bd5c43fc28fddcc35fec265a318055517036 [diff]
test(ff-a): test FFA_MSG_WAIT with retain RX buffer flag

Add helper functions for VMs/SPs to call FFA_MSG_WAIT with flags to
optionally retain RX buffer ownership.

Add test showing verifying that SP keeps ownership of its RX buffer when
calling FFA_MSG_WAIT with retain RX buffer flag set.

Signed-off-by: Kathleen Capella <kathleen.capella@arm.com>
Change-Id: I518a082462fbaf5d3f16811d1d61a6c36ba2aa2f
3 files changed
tree: ad0a45f307a6fc977879b0bbd8886c96876823c2
  1. .vscode/
  2. build/
  3. docs/
  4. driver/
  5. inc/
  6. kokoro/
  7. project/
  8. src/
  9. test/
  10. third_party/
  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. CONTRIBUTING.md
  22. dco.txt
  23. LICENSE
  24. Makefile
  25. navbar.md
  26. pyproject.toml
  27. 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.