Hi Mankyum,

In practice, the recommended baseline is to use Hafnium and TF-A from the corresponding/synchronized release tags. That is the combination we validate routinely in our CI pipeline.

That said, Hafnium and TF-A tags should not be interpreted as a formal guarantee that only identical tags will work together, nor do we maintain a separate published compatibility matrix for all mix-and-match combinations. A non-matching pair may still work, but this depends on the specific FF-A/SPMD/SPMC features involved and on whether the required changes landed in both projects at compatible points in time.

Hence, for production or stable integration, our recommendation is to use matching release tags across the two projects. Hope that clarifies your question.

Thanks, Madhukar ________________________________ From: 김만겸 mankyum.kim@samsung.com on behalf of 김만겸 via Hafnium hafnium@lists.trustedfirmware.org Sent: Monday, July 20, 2026 3:02 AM To: hafnium@lists.trustedfirmware.org hafnium@lists.trustedfirmware.org Subject: [Hafnium] Inquiry regarding TF-A and Hafnium version tagging alignment

Hi Hafnium Team,

I hope this email finds you well.

I am currently working with TF-A and Hafnium, and I have a quick question regarding the versioning and tagging practices between the two projects.

Could you clarify if Hafnium release tags (e.g., v2.14, v2.15) are always strictly synchronized with TF-A release tags in terms of compatibility and FF-A feature support?

Additionally, when picking a stable combination for production or feature integration (especially around SPMD/SPMC interaction), is it recommended to always pair identical release tags between TF-A and Hafnium, or are there specific compatibility matrices we should refer to?

Thank you for your time and guidance.

Best regards,

Mankyum Kim

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