[xen staging] changelog: add relevant changes during 4.14 development window

[patchbot@xxxxxxx]

commit 22970c0e0c9e4ffd51816c1cc7e4aa19800d3d09
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Mon May 11 12:31:45 2020 +0200
Commit:     Wei Liu <wl@xxxxxxx>
CommitDate: Sat May 16 12:50:51 2020 +0100

    changelog: add relevant changes during 4.14 development window
    
    Add entries for the relevant changes I've been working on during the
    4.14 development time frame. Mostly performance improvements related
    to pvshim scalability issues when running with high number of vCPUs.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Paul Durrant <paul@xxxxxxx>
---
 CHANGELOG.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b11e9bc4e3..554eeb6a12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,12 @@ The format is based on [Keep a 
Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ### 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.
 
 ## 
[4.13.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.13.0) 
- 2019-12-17
 
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