doc: Add note about Configurator IVSHMEM/vUART address issue

-  The release v3.0 ACRN Configurator has an issue where you need to save the configuration twice to see the generated I/O or BDF address.

Signed-off-by: Reyes, Amy <amy.reyes@intel.com>

doc/tutorials/enable_ivshmem.rst

@@ -71,6 +71,13 @@ For the shared memory region:
 #. Enter a virtual Board:Device.Function (BDF) address for each VM or leave it
    blank. If the field is blank, the tool provides an address when the
    configuration is saved.
+
+   .. note::
+
+      The release v3.0 ACRN Configurator has an issue where you need to save the
+      configuration twice to see the generated BDF address in the shared memory
+      setting. (:acrn-issue:`7831`)
+
 #. Add more VMs to the shared memory region by clicking **+** on the right
    side of an existing VM. Or click **-** to delete a VM.
 

doc/tutorials/vuart_configuration.rst

@@ -75,6 +75,12 @@ For the connection:
    leave it blank. If the field is blank, the tool provides an address when the
    configuration is saved.
 
+   .. note::
+
+      The release v3.0 ACRN Configurator has an issue where you need to save the
+      configuration twice to see the generated I/O or BDF address in the vUART
+      setting. (:acrn-issue:`7831`)
+
 To add another connection, click **+** on the right side of an existing
 connection. Or click **-** to delete a connection.
 
@@ -151,6 +157,9 @@ connection between two VMs. The example extends the information provided in the
 Learn More
 ==========
 
+ACRN supports multiple inter-VM communication methods. For a comparison, see
+:ref:`inter-vm_communication`.
+
 For details on ACRN vUART high-level design, see:
 
 * :ref:`hv-console-shell-uart`