Hi All,

We have upstreamed TF-A patches for Arm Realm Management Extension (RME) feature at: https://review.trustedfirmware.org/q/topic:%22za%252Ffeat_rme%22+(status:ope...). Any reviews/comments are very much appreciated 🙂

RME is an Armv9-A extension and is one component of the Arm Confidential Compute Architecture (Arm CCA)https://www.arm.com/why-arm/architecture/security-features/arm-confidential-compute-architecture. The major changes with this extension include:

* Two additional Security states, Root and Realm * Two additional physical address spaces, Root and Realm * The ability to dynamically transition memory granules between physical addresses spaces * Granule Protection Check mechanism

More information about RME and Arm CCA can be found at [1] and [2].

[1] https://developer.arm.com/documentation/ddi0615/latest [2] https://developer.arm.com/documentation/den0125/latest

Thanks, Zelalem