lowRISC/opentitan
Oct 2024 – Aug 2025
11 Months active
Languages Used
MarkdownCHjsonSystemVerilogPythonElisp
Technical Skills
DocumentationTechnical WritingDriver DevelopmentEmbedded SystemsFirmware DevelopmentHardware Description
Martin Velay
PROFILE
Martin Velay
Over eleven months, Mvelay contributed to the lowRISC/opentitan repository by developing and verifying hardware security features, with a focus on HMAC and access control modules. Mvelay enhanced design verification environments using SystemVerilog and UVM, expanded test coverage, and improved documentation to clarify processes and accelerate onboarding. Their work included debugging RTL issues, refining testbenches, and optimizing regression testing for cryptographic and access-control routines. By integrating new test configurations and automating coverage analysis, Mvelay increased reliability and reduced validation risk. The technical approach combined hardware design, verification engineering, and Python scripting, resulting in robust, maintainable workflows and improved project traceability.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
106Total
Bugs
14
Commits
106
Features
29
Lines of code
24,073
Activity Months11
Your Network
108 people
Work History
August 2025
4 Commits • 2 Features
Aug 1, 2025Concise monthly summary for 2025-08 focused on lowRISC/opentitan DV work in ac_range_check. The work emphasizes increases in verification coverage, documentation, and process clarity to reduce risk and accelerate validation cycles.
4 Commits • 2 Features
Aug 1, 2025Concise monthly summary for 2025-08 focused on lowRISC/opentitan DV work in ac_range_check. The work emphasizes increases in verification coverage, documentation, and process clarity to reduce risk and accelerate validation cycles.
August 2025
July 2025
1 Commits
Jul 1, 2025July 2025 monthly summary for lowRISC/opentitan: Implemented targeted DV documentation fix and asset relocation to improve maintainability and reduce onboarding time. Focused on ac_range_check DV block diagram README link and centralizing the diagram in the OT drive.
July 2025
1 Commits
Jul 1, 2025July 2025 monthly summary for lowRISC/opentitan: Implemented targeted DV documentation fix and asset relocation to improve maintainability and reduce onboarding time. Focused on ac_range_check DV block diagram README link and centralizing the diagram in the OT drive.
June 2025
1 Commits
Jun 1, 2025Concise monthly summary for 2025-06 focusing on DV documentation improvements and their business value.
1 Commits
Jun 1, 2025Concise monthly summary for 2025-06 focusing on DV documentation improvements and their business value.
June 2025
May 2025
13 Commits • 3 Features
May 1, 2025May 2025 (lowRISC/opentitan) monthly summary focusing on key features delivered, major bugs fixed, and overall impact. The month emphasized verification quality, DV improvements, and documentation hygiene to accelerate security validation and release readiness.
May 2025
13 Commits • 3 Features
May 1, 2025May 2025 (lowRISC/opentitan) monthly summary focusing on key features delivered, major bugs fixed, and overall impact. The month emphasized verification quality, DV improvements, and documentation hygiene to accelerate security validation and release readiness.
April 2025
6 Commits • 2 Features
Apr 1, 2025Concise Monthly Summary — April 2025 (2025-04) This month focused on strengthening verification reliability for critical security controls in OpenTitan and stabilizing test coverage for cryptographic routines. Delivered enhancements with clear spec alignment, improved testbench robustness, and documentation updates to support future maintenance and onboarding. The work reduced risk in access-control validation and increased confidence in HMAC reliability under varied reset scenarios.
6 Commits • 2 Features
Apr 1, 2025Concise Monthly Summary — April 2025 (2025-04) This month focused on strengthening verification reliability for critical security controls in OpenTitan and stabilizing test coverage for cryptographic routines. Delivered enhancements with clear spec alignment, improved testbench robustness, and documentation updates to support future maintenance and onboarding. The work reduced risk in access-control validation and increased confidence in HMAC reliability under varied reset scenarios.
April 2025
March 2025
29 Commits • 11 Features
Mar 1, 2025March 2025 marked a broad set of DV and verification improvements for lowRISC/opentitan, delivering key features, stabilizing tests, and expanding coverage across HMAC, SCB, TLUL, and ac_range_check. The changes drive faster, more reliable regression cycles and clearer documentation, enabling quicker silicon validation and release readiness.
March 2025
29 Commits • 11 Features
Mar 1, 2025March 2025 marked a broad set of DV and verification improvements for lowRISC/opentitan, delivering key features, stabilizing tests, and expanding coverage across HMAC, SCB, TLUL, and ac_range_check. The changes drive faster, more reliable regression cycles and clearer documentation, enabling quicker silicon validation and release readiness.
February 2025
26 Commits • 6 Features
Feb 1, 2025February 2025 monthly summary for lowRISC/opentitan focused on delivering measurable business value through expanded DV coverage, stability improvements, and DV infrastructure migration. The month saw substantive feature work in HMAC DV and ACRC DV, alongside targeted RTL bug fixes and foundational DV environment work to accelerate testing and future milestones. The following achievements capture the engineering impact, collaboration, and readiness for ongoing development cycles.
26 Commits • 6 Features
Feb 1, 2025February 2025 monthly summary for lowRISC/opentitan focused on delivering measurable business value through expanded DV coverage, stability improvements, and DV infrastructure migration. The month saw substantive feature work in HMAC DV and ACRC DV, alongside targeted RTL bug fixes and foundational DV environment work to accelerate testing and future milestones. The following achievements capture the engineering impact, collaboration, and readiness for ongoing development cycles.
February 2025
January 2025
10 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for lowRISC/opentitan focusing on HMAC reliability and DV coverage. Delivered core reset and FIFO status corrections and hardened HMAC verification environment, improving stability, reducing false interrupts, and expanding test coverage for secure peripherals.
January 2025
10 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for lowRISC/opentitan focusing on HMAC reliability and DV coverage. Delivered core reset and FIFO status corrections and hardened HMAC verification environment, improving stability, reducing false interrupts, and expanding test coverage for secure peripherals.
December 2024
11 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for lowRISC/opentitan: Delivered key HMAC improvements and verification enhancements focusing on security, correctness, and DV maturity. Gated DIGEST and MSG_LENGTH updates to IDLE to prevent secret leakage; added data-clearing assertions and wipe-secret documentation updates. Expanded verification environment for HMAC reliability with FSM stress testing, timing-related delays, reset handling during message processing, and enhanced simulator compatibility. Strengthened DV coverage with new tests for FSM transitions, stop-command delays, and DVSim fixes; addressed several DV and TODO cleanup items. Result: improved security posture, higher reliability, and clearer documentation, enabling safer production deployment and faster future iterations.
11 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for lowRISC/opentitan: Delivered key HMAC improvements and verification enhancements focusing on security, correctness, and DV maturity. Gated DIGEST and MSG_LENGTH updates to IDLE to prevent secret leakage; added data-clearing assertions and wipe-secret documentation updates. Expanded verification environment for HMAC reliability with FSM stress testing, timing-related delays, reset handling during message processing, and enhanced simulator compatibility. Strengthened DV coverage with new tests for FSM transitions, stop-command delays, and DVSim fixes; addressed several DV and TODO cleanup items. Result: improved security posture, higher reliability, and clearer documentation, enabling safer production deployment and faster future iterations.
December 2024
November 2024
4 Commits • 2 Features
Nov 1, 20242024-11 monthly summary for lowRISC/opentitan focused on HMAC reliability and verification improvements. Delivered hardware-facing fixes to improve HMAC stability across context-switches, refactored the SystemVerilog verification environment for better maintainability, and updated documentation to guide arbitrary key-length configurations. These efforts contributed to more reliable cryptographic operations, simplified DV maintenance, and clearer guidance for developers configuring HMACs.
November 2024
4 Commits • 2 Features
Nov 1, 20242024-11 monthly summary for lowRISC/opentitan focused on HMAC reliability and verification improvements. Delivered hardware-facing fixes to improve HMAC stability across context-switches, refactored the SystemVerilog verification environment for better maintainability, and updated documentation to guide arbitrary key-length configurations. These efforts contributed to more reliable cryptographic operations, simplified DV maintenance, and clearer guidance for developers configuring HMACs.
October 2024
1 Commits
Oct 1, 20242024-10 Monthly summary for lowRISC/opentitan focused on stabilizing the HMAC programming workflow by addressing an RTL bug related to CMD.hash_stop. Delivered a documented software workaround in the HMAC Programmer Guide, including delays and triggering CMD.hash_process to ensure correct hardware state transitions. The work is aligned with Issue #24767 and PR #24944, and includes documentation updates to related guides (Save and Restore SW guide).
1 Commits
Oct 1, 20242024-10 Monthly summary for lowRISC/opentitan focused on stabilizing the HMAC programming workflow by addressing an RTL bug related to CMD.hash_stop. Delivered a documented software workaround in the HMAC Programmer Guide, including delays and triggering CMD.hash_process to ensure correct hardware state transitions. The work is aligned with Issue #24767 and PR #24944, and includes documentation updates to related guides (Save and Restore SW guide).
October 2024
Activity
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Quality Metrics
Correctness86.6%
Maintainability87.4%
Architecture84.4%
Performance77.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
CElispHjsonMarkdownPythonSystemVerilog
Technical Skills
AXIAccess ControlAssertion CoverageCode Quality AssuranceCommand-line InterfaceCoverage AnalysisDUT IntegrationDebuggingDesign VerificationDigital DesignDocumentationDriver DevelopmentEmbedded SystemsFPGA DevelopmentFirmware Development
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