cross-posted from: https://infosec.pub/post/51597625
The linked list of AMD processors is mobile 3D APUs under codename “Kaveri”. It is well documented that the successor to Steamroller marked the introduction of the PSP. But there is no concrete statement about which chips were the first to have the PSP. Wikipedia states the linked group of APUs have:
- Integrated custom ARM Cortex-A5 co-processor[47] with TrustZone Security Extensions[48]
The footnote does not support the claim. Can anyone confirm or deny whether Kaveri mobile chips have a PSP?
Apparently AMD docs initially contained information about PSP in Steamroller microarchitecture, but it was removed in later documents. It appeared officially in the Excavator.
Maybe it could not be enabled in time for the release, or there were some issues with the new hardware? https://freundschafter.com/amd-processors-without-amd-psp-secure-technology/
I’ve seen that article, which leaves us guessing. This article says Kaveri can’t be trusted, but it cites no source. I wonder if they just read Wikipedia, which is not well supported.
(edit) An org like EFF should investigate and run tests for us. It’s bizarre that in 2026 we still don’t have concrete info on this.