After 7 months of development, the release of a free hypervisor Xen 4.20 was published. Companies such as Amazon, ARM, EPAM Systems, and AMD participated in the development of this new release. Updates for Xen branch 4.20 will continue until September 2026, with the publication of vulnerabilities scheduled until March 2028. The project code is written in SI and is subject to the GPLV2+ license. Development is being carried out as part of the Linux Foundation organization.
Key changes in Xen 4.20:
- Changes for systems based on the x86 architecture:
- The utility “XL” now includes commands “Suspend” and “Resume” for putting a virtual machine into sleep mode. Added support for Intel Ept Paging-write technology to increase productivity by reducing hypervisor control. Support for AMD processors based on Zen 5 microarchitecture with hardware protection against SRSO vulnerabilities. The command line “WallClock” has been added to select a time source.
- The interruption controller Xapic driver was transitioned to use the physical processing regime for external interruptions. Continuity of the X2apic cluster regime for external interruptions has been stopped. Continued support for Intel Xeon Phi processors.
- Changes for systems based on the ARM architecture:
- Added support for coloring in the ARM architecture.
/Reports, release notes, official announcements.