doc: update release notes with new features
Add new features information provided by engineering.
@@ -35,8 +35,17 @@ ACRN v2.6 requires Ubuntu 18.04. Follow the instructions in the
What's New in v2.6
******************
-Topic
- Description
+Nested Virtualization Technology Performance Tuning
+ The performance of nested virtualization, a feature first introduced as a
+ preview in the v2.5 release, was improved. CPU and I/O performance of level 2
+ virtual machines (for example, a VM running on a KVM/QEMU VM that itself is a
+ VM on ACRN hypervisor) is now on par with a VM running on KVM on bare metal.
+ Read more in the :ref:`nested_virt` tutorial.
+
+Support loading OSes in ELF format
+ ACRN hypervisor now can load OS images packed in ELF (Executable and Linkable
+ Format). This adds flexibility to OSs such as Zephyr running in pre-launched
+ VMs.
Upgrading to v2.6 From Previous Releases
@@ -75,6 +84,8 @@ Document Updates
We've made major improvements to the introductory ACRN documentation including:
+.. rst-class:: rst-columns2
+
* :ref:`introduction`
* :ref:`overview_dev`
* :ref:`gsg`
