xen/CHANGELOG.md

Changelog

Notable changes to Xen will be documented in this file.

The format is based on Keep a Changelog

unstable UNRELEASED - TBD

4.15.0 UNRELEASED - TBD

Added / support upgraded

• ARM IOREQ servers (device emulation etc.) (Tech Preview)
• Renesas IPMMU-VMSA (Supported, not security supported; was Tech Preview)
• ARM SMMUv3 (Tech Preview)

Removed / support downgraded

• qemu-xen-traditional as host process device model, now "No security support, not recommended". (Use as stub domain device model is still supported - see SUPPORT.md.)

4.14.0 - 2020-07-23

Added

• This file and MAINTAINERS entry.
• Use x2APIC mode whenever available, regardless of interrupt remapping support.
• Performance improvements to guest assisted TLB flushes, either when using the Xen hypercall interface or the viridian one.
• Assorted pvshim performance and scalability improvements plus some bug fixes.
• Hypervisor framework to ease porting Xen to run on hypervisors.
• Initial support to run on Hyper-V.
• Initial hypervisor file system (hypfs) support.
• libxl support for running qemu-xen device model in a linux stubdomain.
• New 'domid_policy', allowing domain-ids to be randomly chosen.
• Option to preserve domain-id across migrate or save+restore.
• Support in kdd for initial KD protocol handshake for Win 7, 8 and 10 (64 bit).
• Tech preview support for Control-flow Execution Technology, with Xen using Supervisor Shadow Stacks for its own protection.

Changed

• The CPUID data seen by a guest on boot is now moved in the migration stream. A guest migrating between non-identical hardware will now no longer observe details such as Family/Model/Stepping, Cache, etc changing. An administrator still needs to take care to ensure the features visible to the guest at boot are compatible with anywhere it might migrate.

4.13.0 - 2019-12-17

Pointer to release from which CHANGELOG tracking starts