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ACRN Release Version 1.6

By April 1, 2020April 24th, 2020Blog

We are pleased to announce the release of ACRN™ Hypervisor version 1.6, which introduces a number of new features.

What’s new in v1.6

  • Graphics pass-through support
    • The hypervisor and Service VM support pass-through graphics device to target DM-launched guest VMs, based on GVT-d.
  • SRIOV support
    • The ACRN hypervisor allows an SRIOV-capable PCI device’s Physical Function (PF) to be allocated to the Service VM and its Virtual Functions (VFs) to be allocated to any VM.
    • The ACRN Service VM supports an SRIOV ethernet device (through the PF driver) and ensures an SRIOV VF device can be assigned (pass-through) to a post-launched VM (launched by ACRN-DM).
  • CPU sharing enhancement – Halt/Pause emulation
    • For a vCPU using the fairness CPU scheduler, the hypervisor supports yielding an idle vCPU (when it’s running a ‘HLT’ or ‘PAUSE’ instruction).
  • PCI Config space access emulation for Pass-thru devices in the hypervisor
    • The hypervisor provides the necessary emulation (such as config space) of the pass-thru PCI device during runtime for a DM-launched VM. Such runtime emulation is DM-independent.
  • PCI bridge emulation in the hypervisor

See the full release notes and latest documentation for more information about this 1.6 release.

Documentation updates

Many new reference documents are available, including:

SR-IOV Architecture in the ACRN hypervisor

We recommend that all developers upgrade to ACRN release v1.6.

About the ACRN Project

ACRN is a flexible, lightweight reference hypervisor, built with real-time and safety-criticality in mind, optimized to streamline embedded development through an open source platform. To learn more, please visit

About the Linux Foundation

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