OpenPOWER Host OS
The OpenPOWER Host OS is an open source project that consists of a set of software components, including the Linux kernel and KVM virtualization technologies such as QEMU, with added code to provide support for OpenPOWER hardware.
The project provides the core components and a simple build framework that allows the packaging and installation atop a traditional GNU/Linux distribution with the intent of facilitating development/experimentation with POWER.
Explore our latest stable version. Here are its highlights:
- 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 (Host OS guest only).
- Libvirt: updates needed for basic Power9 support - Power9 guest on Power9 host.
- Power9 hardware counter (performance counters) support.
- Memory Hot Unplug for KVM guests does not work at this time.
- Live migration on Power9 DD1 hardware does not work due to CPU timebase offset defect.
- Can not boot p8-compat guests on Power9 due to qemu issues.
Host OS delivers a packaged version of a set of open source projects, installable over a GNU/Linux distribution. The list of Host OS components is (without dependencies):
The project as a whole has an independent versioning not tied to the schedules of individual components.
About every 6 months a tag containing a more significant set of features is promoted to stable. The current stable tag is 2.5-2017-07-12.
The Quick Start guide explains how you can create packages ready for installation on CentOS and optionally a bootable Host OS ISO file.
Host OS components are packaged by a build script that reads from a git repository containing packages metadata. You are encouraged to build your own version and experiment with the various components and their features.
During your exploration time with POWER and Host OS, feel free to ask questions, raise issues, contribute code and interact with the packages maintainers.
One way to share your ideas, specially when regarding single Host OS components, is via the “Issues” page at the component’s GitHub repository.
Contact us via:
IRC: #hostos @freenode
email: email@example.com (subscription link)