Architecture boundaries
A hypervisor can give teams an explicit place to reason about isolation, ownership, and platform responsibilities.
Solution Area
Open virtualization for safety-conscious systems.
Certification-oriented systems need inspectable engineering.
Xen keeps isolation boundaries, resource ownership, guest roles, and hardware responsibilities visible while evidence, tooling, and engineering discipline remain explicit evaluation inputs.
Inspectable boundaries
Functions
Safety-critical workloads
Control, monitoring, and supervision workloads need clear boundaries and reviewable assumptions.
- Control
- Monitoring
- Supervision
Platform services
Non-critical services
Linux services, diagnostics, HMI, telemetry, and update agents can have different validation needs.
- Diagnostics
- HMI
- OTA
Operating environments
Guest domains
Guest systems and service domains keep runtime, ownership, update, and validation boundaries explicit.
- RTOS
- Linux
- Services
Controlled boundary
Xen hypervisor boundary
Isolation, CPU assignment, device ownership, and interrupt routing are platform design inputs.
- Isolation
- CPU assignment
- Devices
Shared platform inputs
Hardware / SoC platform
Compute, memory, interrupts, devices, and peripherals remain part of the system evidence story.
- CPU
- Memory
- Interrupts
- Devices
Xen helps separate safety-conscious workloads, non-critical services, guest domains, the hypervisor boundary, and hardware resources so architecture and evidence responsibilities stay visible.
Architecture and evidence
Safety starts with architecture, but it does not end there.
A hypervisor can help create explicit technical boundaries. Certification-oriented engineering also depends on the system safety case, integration evidence, documented process, tooling, validation, and product-specific review.
The architecture creates the boundary. The engineering process creates the evidence.
Xen source code is not itself safety certified. Certification depends on the complete system, integration context, process, evidence, tooling, validation, and safety case.
Evidence and traceability
Certification-oriented work depends on reviewable evidence, documented assumptions, and traceable engineering decisions.
Integration context
The safety case belongs to the complete system, including hardware, guests, tooling, validation, and deployment context.
Long-term maintenance
Regulated systems need engineering practices that can be sustained across long product and platform lifecycles.
Mixed-criticality systems
Mixed-criticality is a safety engineering problem, not just a consolidation pattern.
Safety-conscious platforms often combine workloads with different criticality, timing, update, and validation needs. The design challenge is keeping boundaries, ownership, dependencies, and evidence clear while functions share hardware.
Different criticality levels
Control, monitoring, diagnostics, HMI, telemetry, and update services may have different safety, timing, and validation expectations.
Independent validation cadence
Linux services and non-critical workloads may need a different validation and maintenance cadence than safety-conscious functions.
Different assurance needs
The hard problem is keeping ownership, assumptions, dependencies, assurance scope, and validation evidence clear as workloads share compute.
Example workload mix
Separation needs to remain visible after consolidation.
Control workload
Monitoring
Diagnostics
HMI
OTA/update service
Service domains
Architecture capabilities
Capabilities engineers evaluate when building safety-conscious platforms.
Xen capabilities are evaluated in the context of a complete system design, not as standalone certification claims. The mechanisms matter most when paired with shared engineering practice, review, and evidence work.
Strong isolation boundary
Use Xen as an explicit hypervisor boundary between guest systems and shared hardware responsibilities.
Static partitioning
Make CPU, memory, interrupt, and device ownership deliberate platform design choices.
CPU assignment
Use CPU pinning and dedicated CPU assignment where the system architecture calls for explicit execution ownership.
Deterministic interrupt latencies
Evaluate interrupt routing, CPU assignment, and device ownership when designing for deterministic interrupt latencies.
Device ownership
Use device passthrough and platform device assignment when a design needs clear hardware ownership by a guest or service domain.
Dom0less boot
Start selected guest domains without waiting for a traditional control-domain boot path when that fits the system design.
Control-domain choices
Choose how platform control, device setup, and management responsibilities are represented instead of assuming one model.
Focused hypervisor boundary
Keep the virtualization and isolation layer focused so teams can reason about the trusted computing base they evaluate.
Long-lived integration
Support platform designs where guests, hardware assumptions, testing, and maintenance evidence evolve over time.
Project coordination
The Xen Safety Committee coordinates certification-oriented work.
The Xen Safety Committee is a formal project committee that defines processes for an auditable code base, creates and maintains associated safety artifacts, and coordinates certification-oriented engineering work.
Xen source code, licensing, and established development flows remain open and unchanged. Upstream technical decisions continue through Xen's open contribution, review, and maintainer processes.
Auditable code-base processes
Define safety-oriented processes that support an auditable code base as Xen evolves.
Managed safety artifacts
Create and maintain associated requirements, architecture material, tests, evidence, and process documentation.
Tooling and validation
Coordinate static analysis, testing, coverage, fault injection, and other certification-oriented engineering inputs.
Sustained alignment
Keep committee processes and artifacts aligned with Xen across long product and platform lifecycles.
Founding Contributors
Built on years of safety-focused engineering.
AMD, EPAM, and Renesas contributed the initiative's initial body of safety-focused work across requirements, architecture, DFMEA, testing, tooling, coverage, and process documentation. This shared starting point gives the initiative momentum while leaving room for future contributors to extend the work.
Evidence, tooling, and code quality
Safety work is evidence work.
Committee coordination becomes useful when it produces engineering signals teams can inspect. Certification-oriented systems need practices and project artifacts that can be reviewed and connected to a product-specific safety case.
The initiative complements Xen's role in Automotive Grade Linux, Linux and Zephyr platform composition, and ongoing MISRA C and ECLAIR work with BUGSENG. It is relevant to automotive, industrial, avionics, robotics, embedded, and other long-lived regulated systems.
Process
Safety-conscious work starts with visible engineering practices and reviewable development decisions.
Analysis
Static analysis and coding-rule efforts help turn code quality work into inspectable engineering inputs.
CI
Public testing and continuous integration resources make more of the project process visible to evaluators.
Documentation
Documented assumptions, limitations, and integration responsibilities help teams build their own safety case.
Safety case input
Xen project artifacts can support evaluation, but the product safety case remains system-specific.
Evaluation checklist
What teams should evaluate before building on Xen.
After the architecture and evidence signals are clear, teams still need to evaluate process, tooling, integration, maintenance, governance, and collaboration responsibilities.
Architecture fit
Where are the guest, control, device, interrupt, and hardware boundaries, and who owns each one?
Process fit
Which project practices, reviews, and maintenance expectations can your organization evaluate and adopt?
Tooling and analysis
Which static analysis, testing, and code-quality signals are relevant to your system and process?
Evidence needs
What evidence does your safety case require, and which parts must be created by your product team?
Integration responsibilities
How will hardware setup, boot flow, guest configuration, devices, and updates be validated in context?
Long-term maintenance
How will security response, releases, CI, and platform updates be handled over the product lifecycle?
Governance and participation
How will your team inspect, influence, and contribute to the open project process?
Supplier and member collaboration
Which members, suppliers, and internal teams need to coordinate on certification-oriented engineering work?
Open governance and project health
A project model teams can inspect.
Governance, security handling, CI resources, releases, contribution paths, and member-funded sustainability are part of the evaluation story.
Linux Foundation stewardship
Xen is organized as a Linux Foundation project with public governance resources.
Security policy
Security reporting and response expectations are documented for users, vendors, and contributors.
Public CI resources
Continuous integration resources and test infrastructure give evaluators more project process to inspect.
Releases and downloads
Release artifacts and downloads support evaluation, development, and lifecycle planning.
Related resources
Follow the evaluation path from architecture to participation.
Use these project, technology, testing, documentation, and membership entry points to continue evaluating Xen for safety-conscious systems.
Hypervisor
Start with the core Xen hypervisor project.
Architecture
See how Xen fits between hardware, guest domains, and platform control.
Isolation & Security
Review isolation and security resources for Xen-based platforms.
Embedded & Automotive
Review the sibling solution page for mixed-criticality embedded and automotive systems.
Continuous Integration
Explore public CI resources, hardware testing, and project testing infrastructure.
Downloads
Find Xen releases for evaluation and development.
Governance
Understand the project model, roles, and governance process.
Security policy
Review the public security reporting and response policy.
Start contributing
Find public contribution paths for engineers who want to participate in Xen development.
Become a member
Support shared project infrastructure, coordination, events, and long-term sustainability.
Documentation and wiki
Use the project wiki for deeper technical documentation.
Membership and participation
Safety-oriented work benefits from a shared starting point.
Rather than starting from zero, Premier Plus members can bootstrap their own certification-oriented programs with an existing, maintained foundation of requirements, architecture material, tests, DFMEA work, tooling, evidence, and process documentation. This reduces duplicated foundational work and gives downstream safety programs a substantial head start.
These committee-managed artifacts are inputs to each organization’s own assessment, certification, audit, and safety case. They are not a complete product certification.
Safety Committee participation
Help set the priorities for Xen safety engineering.
Premier Plus gives organizations building safety-critical and mixed-criticality systems a direct role in the Xen Safety Committee and access to committee-managed safety artifacts.