doc: update release notes for v3.0

This patch updates recommendations to upgrade from a prior ACRN version
for v3.0.

Signed-off-by: Kunhui-Li <kunhuix.li@intel.com>

doc/release_notes/release_notes_3.0.rst

@@ -35,6 +35,26 @@ ACRN v3.0 requires Ubuntu 20.04.  Follow the instructions in the
 What's New in v3.0
 ******************
 
+Redesigned ACRN Configurator
+  Brand new UI, including reduced and simplified parameters, provides intuitive
+  flow to help users configure.
+  hypervisor and VM capabilities and settings.
+Intel® TCC Tools Cache Configurator support
+  RTVM can reserve a portion of cache (L2 or L3) as software SRAM regions on
+  Tiger Lake platform to achieve extreme low latency. For more about Intel TCC tools,
+  check out https://www.intel.com/content/www/us/en/develop/documentation/tcc-tools-2022-1-developer-guide/top/real-time-configuration-and-optimization-tools/cache-allocation/cache-configurator.html
+Commercial off-the-shelf Tiger Lake machine support
+  11th Generation Intel® Core™ Processor (codenamed Tiger Lake) has been supported
+  by ACRN hypervisor since v2.3 release. Now a commercially off-the-shelf complete
+  system is validated and supported.
+Refined shutdown & reset sequence
+  User can shutdown or reset the system gracefully from the Windows User VM.
+  This is achieved by lifecycle managers in each VM which talks to each other
+  via the virtual UART channel.
+Hypervisor Real Time Clock (RTC)
+  Each VM now has its own PC/AT-compatible RTC/CMOS device emulated by the hypervisor.
+  In this way, a sudden jump in VM’s system clock can be avoided which may confuse
+  certain applications.
 
 Upgrading to v3.0 From Previous Releases
 ****************************************
@@ -47,20 +67,71 @@ Generate New Board XML
 
 Board XML files, generated by ACRN board inspector, contain board information
 that is essential to build ACRN. Compared to previous versions, ACRN v3.0 adds
-the following hardware information to board XMLs to support new features and
-fixes.
+the following information to board XMLs to support new features and fixes.
 
-  - TBD
+  - Add ``--add-llc-cat`` :ref:`board_inspector_cl` to Board Inspector Tool, reference
+    PR `#7331 <https://github.com/projectacrn/acrn-hypervisor/pull/7331>`_.
+  - Collect all information about SR-IOV devices, reference PR `#7302 <https://github.com/projectacrn/acrn-hypervisor/pull/7302>`_.
+  - Extract all serial ttys and virtio input devices, reference PR `#7219 <https://github.com/projectacrn/acrn-hypervisor/pull/7219>`_.
+  - Extract common ioapic information such as ioapic id, address, gsi base and gsi num,
+    reference PR `#6987 <https://github.com/projectacrn/acrn-hypervisor/pull/6987>`_.
+  - Add another level of `die` node even though the hardware reports die topology in CPUID,
+    reference PR `#7080 <https://github.com/projectacrn/acrn-hypervisor/pull/7080>`_.
+  - Bringing up all cores online so tool can run cpuid to extract all available cores
+    information, reference PR `#7120 <https://github.com/projectacrn/acrn-hypervisor/pull/7120>`_.
+  - Add CPU capability and BIOS invalid setting checks, reference PR `#7216 <https://github.com/projectacrn/acrn-hypervisor/pull/7216>`_.
+  - Summary board inspector log based on the different log levels, reference PR
+    `#7429 <https://github.com/projectacrn/acrn-hypervisor/pull/7429>`_.
 
 The new board XML can be generated using the ACRN board inspector in the same
-way as ACRN v2.7. Refer to :ref:`acrn_config_workflow` for a complete list of
+way as ACRN v2.7. Refer to :ref:`board_inspector_tool` for a complete list of
 steps to deploy and run the tool.
 
 Update Configuration Options
 ============================
 
-Complete overhaul of configurator in v3.0...
+In v3.0, data in a launch XML are merged into the scenario XML for the new configurator.
+The highly recommended way to use upgrader tool to upgrade a pair of scenario XML and
+launch XML files into a merged file, introduced in https://projectacrn.github.io/latest/tutorials/upgrading_configuration.html.
+Then use the ACRN Configurator to open the upgraded file for further edits in case
+any meaningful data is lost. In detail, the following elements
+are refined in the scenario XML file for user-friendly experience.
 
+- ``RDT``
+- ``vUART``
+- ``IVSHMEM``
+- ``Memory``
+- ``virtio devices``
+
+The following elements are added to scenario XML files.
+
+- ``vm.lapic_passthrough``
+- ``vm.io_completion_polling``
+- ``vm.nested_virtualization_support``
+- ``vm.virtual_cat_support``
+- ``vm.secure_world_support``
+- ``vm.hide_mtrr_support``
+- ``vm.security_vm``
+
+The following elements were removed.
+
+- ``hv.FEATURES.NVMX_ENABLED``
+- ``hv.DEBUG_OPTIONS.LOG_BUF_SIZE``
+- ``hv.MEMORY.PLATFORM_RAM_SIZE``
+- ``hv.MEMORY.LOW_RAM_SIZE``
+- ``hv.CAPACITIES.MAX_IR_ENTRIES``
+- ``hv.CAPACITIES.IOMMU_BUS_NUM``
+- ``vm.guest_flags``
+- ``vm.board_private``
+
+In v3.0, we refine the structure of the generated scripts so that PCI functions
+are identified only by their BDF. This change serves as a mandatory step to align
+the way how passthrough devices are configured for pre-launched and post-launched VMs,
+which eventually allows us to present a unified view in the the ACRN Configurator for
+assigning passthrough device. Then we remove some obsolete dynamic parameters and update the
+usage of the `--cpu_affinity` parameter in launch script generation logic to use the lapic ID
+instead of pCPU ID. (see the `Device Model parameters
+<https://projectacrn.github.io/latest/user-guides/acrn-dm-parameters.html>`_)
 
 Document Updates
 ****************
@@ -79,3 +150,7 @@ Fixed Issues Details
 Known Issues
 ************
 
+- :acrn-issue:`6631` - [KATA] Kata support is broken since v2.7
+- :acrn-issue:`6978` - [TGL] openstack failed since ACRN v2.7
+- :acrn-issue:`7827` - [Configurator]Pre_launched standard VMs cannot share CPU with Service VM
+- :acrn-issue:`7831` - [Configurator] Need to save twice to generate vUART and IVSHMEM addresses