Hi All,
I pushed for initial testing and review a series of patches to support the Scheduling-NSPE Hybrid Platform Solution (aka Solution-2).
A "Hybrid Platform" is an extension of the MULTICORE case where applications also run in the NS-side of the core that hosts TF-M SPE.
Patches can be found at this gerrit topic (hybrid-plat-nspe): https://review.trustedfirmware.org/q/topic:%22hybrid-plat-nspe%22.
All the patches are Request-For-Comments (RFC) and the community is welcome to provide feedback on such changes/proposal.
The "Hybrid Platform" support coming to TF-M has been discussed a few times in the past and slides and recordings are available in the technical forum past events: https://www.trustedfirmware.org/meetings/tf-m-technical-forum/.
This presented solution follows the main ideas presented in the past.
However, since the last presentations, some adjustments have been done, in particular around:
- naming: we won't use numbers for solutions, like Sol.1, 2 etc, but instead we name them: _SPE, _NSPE etc, to make immediately clear the use-case.
- "simple first" approach: we aim to provide a "simple" solution in the attempt to provide an initial reference and keep the core code readable, compact and testable. If there are significant use-cases to be included, please share your feedback and we'll find a best solution.
Kindly expect some changes on these proposed patches above while I rebase, perform some other tests and need to refactor some portions.
Expected timeline for Hybrid Platform Solution:
- SPE-support: already merged into mainline
- NSPE-support (this series above), merge within two months (end of Feb-25), provided that there will be no disruptive changes
- BALANCED-support: a new set will be available around the middle of 2025 (subject to change).
Many thanks in advance and happy New Year.
Best regards,
Nicola
Nicola Mazzucato (7):
[RFC 1/7] SPM: tfm_rpc: Add `process_new_msg handler`
[RFC 2/7] tfm_spe_mailbox: Add `mailbox_process_new_msg` handler
[RFC 3/7] ns_agent_mailbox: Add NS_AGENT_MBOX_PROCESS_NEW_MSG_SIGNAL aux service
[RFC 4/7] SPM: backend_ipc: Conditionally assert MBOX signal on SCHED_TYPE
[RFC 5/7] SPM: tfm_multi_core: Record and clear mailbox IRQ via multi_core API
[RFC 6/7] docs: hybrid_platform: Add documentation
[RFC 7/7] Config Base for Hybrid Platform
Nicola Mazzucato (he/him/his) | CE-Software Group | Arm
110 Fulbourn Rd, CB1 9NJ, Cambridge UK
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