Trusted-services April 2026

trusted-services@lists.trustedfirmware.org

2 participants
2 discussions

Firmware-A v2.15 release code freeze notification

by harrison.mutai＠arm.com

The content of this message was lost. It was probably cross-posted to multiple lists and previously handled on another list.

1 week

How trusted Service to obtain the physical address of a buffer for DMA.

by Kummari, Prasad

[AMD Official Use Only - AMD Internal Distribution Only] Hi Team, I am working on a Trusted Service running under OP-TEE SPMC (FF-A based setup) on ARMv8. We are implementing a block storage service that reads data from OSPI flash using a DMA engine. Currently, the Trusted Service allocates a buffer and passes it to the DMA engine, but the read operation returns all zeros. I suspect this is because the buffer is a virtual address, while the DMA expects a physical address. My questions: 1. Is there a supported way for a Trusted Service to obtain the physical address of a buffer? 2. If not, what is the recommended approach for handling DMA in this context? Should this be done outside the Trusted Service using shared memory? Any guidance would be appreciated. Regards, Prasad.

1 week, 6 days

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Trusted-services April 2026