We’re happy to announce the release of OpenPOWER Host OS, Version 2.5!

This release is a follow-on to include code for the next generation of POWER9 processors. You’ll find the full collection of components in the OpenPOWER Host OS repository on GitHub. Additional information on how to get started is in the OpenPOWER Host OS project landing page.

New and noteworthy

The following list contains some of the new features included in this release. Be sure to check the version 2.5 release page for full details:

  • Power9 KVM Host support (with continued support for Power8)
  • Power9 native interrupt controller (aka XIVE) support for bare metal (w/Power8 interrupt controller (XICS) emulation for KVM guests)
  • Memory Hotplug support for KVM guests (HostOS guest only).
  • Libvirt: updates needed for basic P9 support – P9 guest on P9 host
  • P9 hardware counter (performance counters) support

You can see the history of every version at our releases page. You can also find the more stable releases.

What is OpenPOWER Host OS?

OpenPOWER Host OS is an open source repository and collaboration model that contains core elements for a Linux Host OS and KVM virtualization. It enables OpenPOWER community members and partners to build their own derivative Linux distribution and products with the most recent features.

This is an ideal project for anyone looking for an open and free alternative to run KVM virtualization on OpenPOWER platforms.

The following list highlights some of its key validated features:

  • Addition/removal of virtual devices
  • Dynamic and Static split core (good for small VMs/workloads)
  • CPU, memory, I/O affinity
  • Processor and memory over-commit and sharing
  • Live migration
  • PCI pass-through
  • Mixed mode: big-endian and little-endian guests
  • Little-endian hypervisor (easier to be consumed by OpenPOWER partners)
  • Dynamic micro-threading
  • Virtio 1.0

Check out the OpenPOWER Host OS overview today, and take advantage of all the new functions in Version 2.5!

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