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Andrew Cooper 88cfd062e8 changelog: Add notes about CET and Migration changes

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Release-acked-by: Paul Durrant <paul@xen.org>

2020-06-26 16:34:02 +01:00

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Changelog

Notable changes to Xen will be documented in this file.

The format is based on Keep a Changelog

Unreleased

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