Cloud Hypervisor v0.10.0 Released!

Posted September 18, 2020 by Cloud Hypervisor Team ‐ 2 min read

This release has been tracked through the 0.10.0 project.

Highlights for cloud-hypervisor version 0.10.0 include:

virtio-block Support for Multiple Descriptors

Some virtio-block device drivers may generate requests with multiple descriptors and support has been added for those drivers.

Memory Zones

Support has been added for fine grained control of memory allocation for the guest. This includes controlling the backing of sections of guest memory, assigning to specific host NUMA nodes and assigning memory and vCPUs to specific memory nodes inside the guest. Full details of this can be found in the memory documentation.

Seccomp Sandbox Improvements

All the remaining threads and devices are now isolated within their own seccomp filters. This provides a layer of sandboxing and enhances the security model of cloud-hypervisor.

Preliminary KVM HyperV Emulation Control

A new option (kvm_hyperv) has been added to --cpus to provide an option to toggle on KVM’s HyperV emulation support. This enables progress towards booting Windows without adding extra emulated devices.

Notable Bug Fixes

  • When using ch-remote to resize the VM parameter now accepts the standard sizes suffices (#1596)
  • cloud-hypervisor no longer panics when started with --memory hotplug_method=virtio-mem and no hotplug_size (#1564)
  • After a reboot memory can remove when using --memory hotplug_method=virtio-mem (#1593)
  • --version shows the version for released binaries (#1669)
  • Errors generated by worker threads for virtio devices are now printed out (#1551)


Many thanks to everyone who has contributed to our 0.10.0 release including some new faces.


See the GitHub Release for the release assets.