Cloud Hypervisor v18.0 Released!
Posted September 9, 2021 by Cloud Hypervisor Team ‐ 2 min read
This release has been tracked through the v18.0 project.
Experimental User Device (
Experimental support for running PCI devices in userspace via
has been included. This allows the use of the SPDK NVMe
with Cloud Hypervisor. This is enabled by
--user-device on the command line.
Migration support for
Devices exposed into the VM via
vhost-user can now be migrated using the live
migration support. This requires support from the backend however the commonly
vhost-user backend does support this.
VHDX disk image support
Images using the VHDX disk image format can now be used with Cloud Hypervisor.
Device pass through on MSHV hypervisor
When running on the MSHV hypervisor it is possible to pass through devices from
the host through to the guest (e.g with
AArch64 for support
The reference Linux kernel we recommend for using with Cloud Hypervisor now supports
virtio-mem on AArch64.
Live migration on MSHV hypervisor
Live migration is now supported when running on the MSHV hypervisor including efficient tracking of dirty pages.
AArch64 CPU topology support
The CPU topology (as configured through
--cpu topology=) can now be
configured on AArch64 platforms and is conveyed through either ACPI or device
Power button support on AArch64
Use of the ACPI power button (e.g
ch-remote --api-socket=<API socket> power-button)
is now supported when running on AArch64.
Notable bug fixes
- Using two PTY outputs e.g.
--serial pty --console ptynow works correctly (#3012)
- TTY input is now always sent to the correct destination (#3005)
- The boot is no longer blocked when using a unattached PTY on the serial console (#3004)
- Live migration is now supported on AArch64 (#3049)
- Ensure signal handlers are run on the correct thread (#3069)
Many thanks to everyone who has contributed to our release:
- Alyssa Ross firstname.lastname@example.org
- Anatol Belski email@example.com
- Arafatms firstname.lastname@example.org
- Bo Chen email@example.com
- Fazla Mehrab firstname.lastname@example.org
- Henry Wang Henry.Wang@arm.com
- Jianyong Wu email@example.com
- Jiaqi Gao firstname.lastname@example.org
- Markus Theil email@example.com
- Muminul Islam firstname.lastname@example.org
- Rob Bradford email@example.com
- Sebastien Boeuf firstname.lastname@example.org
- Wei Liu email@example.com
- Yu Li firstname.lastname@example.org
See the GitHub Release for the release assets.