This release has been tracked in our roadmap
project as iteration
v43.0. The following user visible changes have been made:

Live Migration over TCP Connections

Support has been added to enable direct live migration from two hosts via TCP
connections. This supplements the existing support for migrating over a UNIX
socket which can then be tunnelled as desired. The documentation has been
updated. (#6850)

Notable Performance Improvements

The VIRTIO_RING_F_INDIRECT_DESC feature has been enabled for virtio-block
devices. This significantly increases the throughput of the devices with a
small negative impact on latency. (#6826)

Notable Bug Fixes

• Cloud Hypervisor now accepts VFIO devices that use I/O PCI BARs on non x86-64
  architectures. Whether they function depends on the host PCI host bridge
  support - previously they would be rejected even if the driver did not use
  these BARs. (vmm: support PCI I/O regions on all architectures #6871)
• Command line groups were adjusted to ensure that at least one payload
  parameter was provided if any other VM parameters provided. (Require payload argument when parsing any other VM argument #6832)

Contributors

Many thanks to everyone who has contributed to our release:

• Alyssa Ross hi@alyssa.is
• Andrew Consroe aconz2@gmail.com
• Bo Chen bo.arvin.chen@gmail.com
• Jinrong Liang cloudliang@tencent.com
• Julian Stecklina julian.stecklina@cyberus-technology.de
• Muminul Islam muislam@microsoft.com
• Rob Bradford rbradford@rivosinc.com
• Ruoqing He heruoqing@iscas.ac.cn
• Wojtek Czekalski wczekalski@me.com