zephyrproject-rtos/trusted-firmware-a
Oct 2024 – Mar 2025
2 Months active
Languages Used
C
Technical Skills
ARM ArchitectureEmbedded SystemsFirmware DevelopmentSystem Programming
Javier Almansa Sobrino
PROFILE
Javier Almansa Sobrino
Worked on expanding hardware feature support in the zephyrproject-rtos/trusted-firmware-a repository, focusing on ARM architecture and embedded systems. Delivered SCTLR2 feature enablement for the Realm world by implementing hardware feature detection and configuring SCR_EL3, laying groundwork for future security and performance improvements. Later, developed MPAM Resource Management within the Realm Execution Environment, allowing the Realm Management Module to configure and trap MPAM system registers when supported, and refined trap behavior to align with Realm isolation requirements. All work was implemented in C, emphasizing firmware development and system programming, and contributed to enhanced hardware compatibility and resource isolation in trusted firmware.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
2Total
Bugs
0
Commits
2
Features
2
Lines of code
22
Activity Months2
Your Network
679 peopleSame Organization
@arm.com538
Work History
March 2025
1 Commits • 1 Features
Mar 1, 2025In March 2025, delivered the MPAM Resource Management feature in the Realm Execution Environment for zephyrproject-rtos/trusted-firmware-a, enabling the RMM to configure and trap MPAM system registers within REE when MPAM is supported and enabled. A targeted fix adjusts trap behavior in Realm mode to prevent unintended trapping, aligning with Realm isolation expectations (commit d048af0da1022a844e153093395087c724f12e40).
1 Commits • 1 Features
Mar 1, 2025In March 2025, delivered the MPAM Resource Management feature in the Realm Execution Environment for zephyrproject-rtos/trusted-firmware-a, enabling the RMM to configure and trap MPAM system registers within REE when MPAM is supported and enabled. A targeted fix adjusts trap behavior in Realm mode to prevent unintended trapping, aligning with Realm isolation expectations (commit d048af0da1022a844e153093395087c724f12e40).
March 2025
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary for zephyrproject-rtos/trusted-firmware-a. Focused on expanding Realm world hardware feature support by delivering SCTLR2 feature enablement and preparing for broader SCTLR2_ELx usage across trusted firmware. The work enhances capability alignment with hardware feature sets and sets a foundation for future security and performance improvements in the Realm world.
October 2024
1 Commits • 1 Features
Oct 1, 2024October 2024 monthly summary for zephyrproject-rtos/trusted-firmware-a. Focused on expanding Realm world hardware feature support by delivering SCTLR2 feature enablement and preparing for broader SCTLR2_ELx usage across trusted firmware. The work enhances capability alignment with hardware feature sets and sets a foundation for future security and performance improvements in the Realm world.
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Quality Metrics
Correctness90.0%
Maintainability90.0%
Architecture90.0%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
ARM ArchitectureEmbedded SystemsFirmware DevelopmentSystem Programming
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