Merge branch 'master' into publish

Author: deb-intel

architectures/firmware/sof-zephyr/mpp_layer/images/mpp_scheduling/edf_scheduling.diag

@@ -85,7 +85,7 @@
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 
-version = release = "2.8.0"
+version = release = "2.9.0"
 
 #
 # The short X.Y version.

conf.py

@@ -58,16 +58,24 @@ Set up a target
 	 sudo emacs /etc/default/grub
 
    b) Change ``GRUB_DEFAULT=[n]`` to ``GRUB_DEFAULT=saved``.
-      
-   c) Add ``GRUB_DISABLE_SUBMENU=y`` to the end of the file and save it.
 
-      This step is necessary because submenus confuse ktest.
+   c) You must disable GRUB submenus because they confuse ktest:
+
+      .. code-block:: console
+
+	echo 'GRUB_DISABLE_SUBMENU=y' | sudo tee -a /etc/default/grub.d/disable-submenu.cfg
 
    d) Update the grub configuration.
 
       .. code-block:: console
-	 
-	 sudo update-grub
+
+	# Better safe than _very_ sorry
+	sudo cp /boot/grub/grub.cfg /boot/grub/saved_grub.cfg
+
+	sudo update-grub
+
+	# Make sure submenus are actually disabled
+	grep submenu /boot/grub/grub.cfg
 
 #. Set the default kernel.
 
@@ -84,7 +92,7 @@ Set up a target
 	# Print your currently booted (and known-safe) option
 	cat /proc/cmdline
 	# List the grub entries
-	awk '/^menuentry/ { print i++, '\t', $0 }' /boot/grub/grub.cfg
+	awk '/^menuentry|submenu/ { print i++, '\t', $0 }' /boot/grub/grub.cfg
 	# Find the entry that matches the output of the
 	# first command you ran, and take note of its number
 	sudo grub-set-default [n] # Where [n] is that number
@@ -135,7 +143,7 @@ Set up a target
          #=> saved_entry=6
 
       # Show all, numbered kernel choices without (re)booting
-      awk '/^menuentry/ { print i++, '\t', $0 }' /boot/grub/grub.cfg
+      awk '/^menuentry|submenu/ { print i++, '\t', $0 }' /boot/grub/grub.cfg
          #=> 5  menuentry ...
          #=> 6  menuentry 'Ubuntu, with Linux 5.4.0-53-generic' --class ubuntu ...
          #=> 7  menuentry ...

getting_started/setup_linux/setup_ktest_environment.rst

@@ -26,7 +26,7 @@ kernel, and documentation. Download the source code as a zip or tar.gz file:
 Source and Binary Releases
 --------------------------
 
-The latest SOF release is v2.8.0 (Dec 2023).
+The latest SOF release is v2.9.0 (Mar 2024).
 
 View new feature information and release downloads for the latest and
 previous releases on GitHub. Firmware and SDK tool source code and binary