[yocto-docs,v2,14/14] migration-guides: update the release notes for 5.2

diff --git a/documentation/migration-guides/migration-5.2.rst b/documentation/migration-guides/migration-5.2.rst
index 7b35e7721fa74f51617fb5530987f62e9c74fed9..cb70e19da0c6b42a89414d2fc98ed13088494409 100644
--- a/documentation/migration-guides/migration-5.2.rst
+++ b/documentation/migration-guides/migration-5.2.rst
@@ -14,6 +14,28 @@  Migration notes for |yocto-ver| (|yocto-codename|)
 This section provides migration information for moving to the Yocto
 Project |yocto-ver| Release (codename "|yocto-codename|") from the prior release.
 
+``debug-tweaks`` removed from :term:`IMAGE_FEATURES`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``debug-tweaks`` image feature is now removed because it was too vague about
+what it achieved: an image on which the ``root`` user can login without a
+password.
+
+To achieve the same result, the features previously added by ``debug-tweaks``
+should be manually added to the :term:`IMAGE_FEATURES` variable. These are:
+
+-  ``allow-empty-password``
+-  ``allow-root-login``
+-  ``empty-root-password``
+-  ``post-install-logging``
+
+Such a statement would be::
+
+   IMAGE_FEATURES += "allow-empty-password allow-root-login empty-root-password post-install-logging"
+
+See the list of available image features in the :ref:`ref-features-image`
+section of the Yocto Project Reference Manual.
+
 Supported kernel versions
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -34,9 +56,24 @@  See :ref:`all supported distributions <system-requirements-supported-distros>`.
 Go language changes
 ~~~~~~~~~~~~~~~~~~~
 
+Rust language changes
+~~~~~~~~~~~~~~~~~~~~~
+
+-  Recipes inheriting the :ref:`ref-classes-cargo` do not install libraries by
+   default anymore. This behavior can be controlled by the
+   :term:`CARGO_INSTALL_LIBRARIES` variable.
+
 systemd changes
 ~~~~~~~~~~~~~~~
 
+-  Support for ``split-usr`` and ``unmerged-usr`` are now removed after Systemd
+   was updated to version 255. This option allowed installing Systemd in a
+   system where directories such as ``/lib``, ``/sbin`` or ``/bin`` are *not*
+   merged into ``/usr``.
+
+   As a consequence, the ``systemd`` recipe no longer contains the ``usrmerge``
+   :term:`PACKAGECONFIG` option as it is now implied by default.
+
 Recipe changes
 ~~~~~~~~~~~~~~
 
@@ -45,16 +82,35 @@  Removed variables
 
 The following variables have been removed:
 
+-  ``PACKAGE_SNAP_LIB_SYMLINKS``: related to an unmaintained and obsolete
+   "micro" :term:`distro <DISTRO>`.
+
+-  ``SETUPTOOLS_INSTALL_ARGS``: obsolete and unused variable.
+
+-  ``BB_DANGLINGAPPENDS_WARNONLY``: support for only warning the user when a
+   ``.bbappend`` file doesn't apply to the original recipe has been dropped. See
+   the :ref:`dev-manual/layers:Appending Other Layers Metadata With Your Layer`
+   section of the Yocto Project Development Tasks Manual for alternatives to
+   this variable.
+
 Removed recipes
 ~~~~~~~~~~~~~~~
 
 The following recipes have been removed in this release:
 
+-  ``liburi-perl``: moved to :oe_git:`meta-perl </meta-openembedded/tree/meta-perl>`.
+-  ``python3-isodate``: moved to :oe_git:`meta-python </meta-openembedded/tree/meta-python>`.
+-  ``python3-iniparse``: removed as there are no consumers of this recipe in
+   :oe_git:`openembedded-core </openembedded-core>` or :oe_git:`meta-openembedded </meta-openembedded>`.
+
 Removed classes
 ~~~~~~~~~~~~~~~
 
 The following classes have been removed in this release:
 
+-  ``migrate_localcount.bbclass``: obsolete class for which code was already
+   removed in 2012.
+
 Miscellaneous changes
 ~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/documentation/migration-guides/release-notes-5.2.rst b/documentation/migration-guides/release-notes-5.2.rst
index d03ed7a3b07936fc3c2d15177f350b5507ecb5d4..0eef448330df0b3b3ec8a2c77cdb042a36e240c1 100644
--- a/documentation/migration-guides/release-notes-5.2.rst
+++ b/documentation/migration-guides/release-notes-5.2.rst
@@ -14,36 +14,377 @@  New Features / Enhancements in |yocto-ver|
 
 -  New variables:
 
+   -  ``linux-firmware``: Add the :term:`FIRMWARE_COMPRESSION` variable which
+      allows compression the firmwares provided by the ``linux-firmware`` recipe.
+      Possible values are ``xz`` and ``zst``.
+
 -  Kernel-related changes:
 
+   -  :ref:`ref-classes-cml1`: in :ref:`ref-tasks-diffconfig`, do not override
+      ``.config`` with ``.config.orig``. This applies to other recipes using the
+      class :ref:`ref-classes-cml1`.
+
+   -  ``linux-firmware``: add following new firmware packages:
+
+       -  ``qcom-qcm6490-audio``
+       -  ``qcom-qcm6490-compute``
+       -  ``qcom-adreno-a663``
+       -  ``qcom-qcm6490-adreno``
+       -  ``qcom-sa8775p-adreno``
+       -  ``qcom-qcm6490-ipa``
+       -  ``qcom-x1e80100-audio``
+       -  ``qcom-qcs615-adreno``
+
+   -  The :ref:`ref-classes-kernel-yocto` classes now supports in-tree
+      configuration fragments. These can be added with the
+      :term:`KERNEL_FEATURES` variable.
+
+   -  The ``kern-tools`` recipe is now able to recognize files ending with
+      ``.config`` for :ref:`ref-classes-kernel-yocto`-based Kernel recipes.
+
+   -  Support the LZMA compression algorithm in the
+      :ref:`ref-classes-kernel-uboot` class. This can be done by setting the
+      variable :term:`FIT_KERNEL_COMP_ALG` to ``lzma``.
+
 -  New core recipes:
 
+   -  ``python3-pefile``: required for the :ref:`ref-classes-uki` class.
+
+   -  Add initial support for the `Barebox <https://www.barebox.org>`__
+      bootloader, along with associated OEQA test cases.
+
+   -  Import ``makedumpfile`` from meta-openembedded, as the ``kexec-tools``
+      recipe :term:`RDEPENDS` on it.
+
+   -  The ``tcl-8`` recipe was added back to support the build of ``expect``.
+
+   -  Add the ``libdisplay-info`` recipe, an EDID and DisplayID library,
+      required for Weston 14.0.1 and newer.
+
+   -  The ``hwdata`` recipe was imported from :oe_git:`meta-openembedded
+      </meta-openembedded>`, a recipe for hardware identification and
+      configuration data, needed by ``libdisplay-info``.
+
+-  New core classes:
+
+   -  New :ref:`ref-classes-uki` class for building Unified Kernel Images (UKI).
+      Associated OEQA tests were also added for this class.
+
+   -  New :ref:`ref-classes-cython` class for python recipes that require Cython
+      for their compilation. Existing recipes depending on Cython now inherit
+      this class. This class also strips potential build paths in the compilation
+      output for reproducibility.
+
+-  Architecture-specific changes:
+
+   -  ``tune-cortexa32``: set tune feature to ``armv8a``.
+
 -  QEMU / ``runqemu`` changes:
 
+-  Documentation changes:
+
+   -  Use ``rsvg`` as a replacement of ``inkscape`` to convert svg files in the
+      documentation.
+
+   -  The ``cve`` role was replaced by ``cve_nist`` to avoid a conflict with
+      more recent version of Sphinx.
+
 -  Go changes:
 
+   -  The :ref:`ref-classes-go-mod` class now sets an internal variable
+      ``GO_MOD_CACHE_DIR`` to enable the use of the Go module fetchers for
+      downloading and unpacking module dependencies to the module cache.
+
+   -  Make the :ref:`ref-tasks-compile` task run before
+      :ref:`ref-tasks-populate_lic` in the :ref:`ref-classes-go-mod` class so
+      license files are found by :ref:`ref-tasks-populate_lic` after the ``go
+      install`` command is run in :ref:`ref-tasks-compile`.
+
 -  Rust changes:
 
--  wic Image Creator changes:
+   -  ``rust-target-config``: Update the data layout for the *x86-64* target, as
+      it was different in Rust from LLVM, which produced a data layout error.
+
+-  Wic Image Creator changes:
+
+   -  Allow the ``--exclude-path`` option to exclude symlinks.
+
+   -  Add the variable :term:`WIC_SECTOR_SIZE` to control the sector size of Wic
+      images.
 
 -  SDK-related changes:
 
+   -  Add support for ZST-compression through :term:`SDK_ARCHIVE_TYPE`, by
+      setting its value to ``tar.zst``.
+
+   -  The ``debug-tweaks`` features were removed from ``-sdk`` images
+      (``core-image-*-sdk.bb``).
+
+   -  Enable ``ipv6``, ``acl``, and ``xattr`` in :term:`DISTRO_FEATURES_NATIVESDK`.
+
 -  Testing-related changes:
 
+   -  ``oeqa/postactions``: Fix archive retrieval from target.
+
+   -  ``oeqa/selftest/gcc``: Fix kex exchange identification error.
+
+   -  ``oeqa/utils/qemurunner``: support ignoring vt100 escape sequences.
+
+   -  ``oeqa``: support passing custom boot patterns to runqemu.
+
+   -  ``oeqa/selftest/cases``: add basic U-boot and Barebox tests.
+
+   -  ``oeqa/selftest/rust``: skip on all MIPS platforms.
+
+   -  Lots of changes and improvements to the :term:`Toaster` OEQA tests.
+
+   -  ``oeqa/selftest``: add a test for bitbake "-e" and "-getvar" difference.
+
+   -  ``oeqa/ssh``: improve performance and log sizes when handling large files.
+
 -  Utility script changes:
 
+   -  The ``patchreview.py`` script now uses the ``check_upstream_status`` from
+      ``oe.qa`` to get patch statuses.
+
+   -  ``resulttool``:
+
+      -  Allow store to filter to specific revisions (``--revision`` flag).
+
+      -  Use single space indentation in JSON output, to save disk
+         space.
+
+      -  Add ``--logfile-archive`` option to store and archive log files
+         separately.
+
+      -  Handle LTP raw logs as well as Ptest.
+
+   -  ``scripts/yocto-check-layer``:
+
+      -  Check for the presence of a ``SECURITY.md`` file in layers and make it
+         mandatory.
+
+      -  The :ref:`ref-classes-yocto-check-layer` class now uses
+         :term:`CHECKLAYER_REQUIRED_TESTS` to get the list of QA checks to verify
+         when running the ``yocto-check-layer`` script.
+
 -  BitBake changes:
 
+   -  ``fetch2``: do not preserve ownership when unpacking.
+
+   -  ``fetch2``: switch from Sqlite ``persist_data`` to a standard cache file
+      for checksums, and drop ``persist_data``.
+
+   -  ``fetch2``: add support for GitHub codespaces by adding the
+      ``GITHUB_TOKEN`` to the list of variables exported during ``git``
+      invocations.
+
+   -  ``fetch2``: set User-Agent to 'bitbake/version' instead of a "fake
+      mozilla" user agent.
+
+   -  ``compress``: use ``lz4`` instead of ``lz4c``, as ``lz4c`` as been
+      considered deprecrated since 2018.
+
+   -  ``server/process``: decrease idle/main loop frequency, as it is idle and
+      main loops have socket select calls to know when to execute.
+
+   -  ``bitbake-worker``: improve bytearray truncation performance when large
+       amounts of data are being transferred from the cooker to the worker.
+
+   -  ``bitbake-worker/cooker``: increase the default pipe size from 64KB to
+      512KB for better efficiency when transferring large amounts of data.
+
+   -  ``fetch/wget``: increase timeout to 100s from 30s to match CDN worst
+      response time.
+
+   -  ``bitbake-getvar``: catch ``NoProvider`` exception to improve error
+      readability when a recipe is not found with ``--recipe``.
+
+   -  ``bb/build``: add a function ``bb.build.listtasks()`` to list the tasks in
+      a datastore.
+
+   -  Remove custom exception backtrace formatting, and replace occurences of
+      ``bb.exception.format_exception()`` by ``traceback.format_exception()``.
+
+   -  ``runqueue``: various performance optimizations including:
+
+      -  Fix performance of multiconfigs with large overlap.
+      -  Optimise ``setscene`` loop processing by starting where it
+         was left off in the previous execution.
+
+   -  ``knotty`` now hints the user if :term:`MACHINE` was not set in
+      the ``local.conf`` file.
+
 -  Packaging changes:
 
--  Security changes:
+   -  ``systemd``: extract dependencies from ``.note.dlopen`` ELF segments, to
+      better detect dynamically linked libraries at runtime.
+
+   -  ``package_rpm``: use ZSTD's default compression level from the variable
+      :term:`ZSTD_COMPRESSION_LEVEL`.
+
+   -  ``package_rpm``: restrict RPM packaging to 4 threads to improve
+      the compression speed.
 
 -  LLVM related changes:
 
 -  SPDX-related changes:
 
+   -  SPDX 3.0: Find local sources when searching for debug sources.
+
+   -  SPDX 3.0: Map ``gitsm`` URIs to ``git``.
+
+   -  SPDX 3.0: Link license and build by alias instead of SPDX ID.
+
+   -  Fix SPDX tasks not running when code changes (use of ``file-checksums``).
+
+-  ``devtool`` changes:
+
+   -  Remove the "S = WORKDIR" workaround as now :term:`S` cannot be equal to
+      :term:`WORKDIR`.
+
+-  Patchtest-related changes:
+
+   -  Refactor pattern definitions in a ``patterns`` module.
+
+   -  Refactor and improve the ``mbox`` module.
+
+   -  Split out result messages.
+
+   -  Add a check for user name tags in patches (for example "fix added by
+      @username").
+
+-  :ref:`ref-classes-insane` class related changes:
+
+   -  Only parse ELF if they are files and not symlinks.
+
+   -  Check for ``RUNPATH`` in addition to ``RPATH`` in binaries.
+
+   -  Ensure :ref:`ref-classes-insane` tasks of dependencies run in builds when
+      expected.
+
+-  Security changes:
+
+   -  The ``PIE`` gcc flag is now passed for the *powerpc* architecture after a
+      bugfix in gcc (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81170).
+
+   -  ``openssh``: be more restrictive on private key file permissions by
+      setting them from the :ref:`ref-tasks-install` task.
+
+-  :ref:`ref-classes-cve-check` changes:
+
+   -  Update the :term:`DL_DIR` database location name
+      (``${DL_DIR}/CVE_CHECK2``).
+
+   -  Add the field "modified" to the JSON report (from "NVD-modified").
+
+   -  Add support for CVSS v4.0.
+
+   -  Fix malformed cve status description with ``:`` characters.
+
+   -  Restore the :term:`CVE_CHECK_SHOW_WARNINGS` variable and functionality. It
+      currently prints warning message for every unpatched CVE the
+      :ref:`ref-classes-cve-check` class finds.
+
+-  New :term:`PACKAGECONFIG` options for individual recipes:
+
+      -  ``perf``: ``zstd``
+      -  ``ppp``: ``pam``, ``openssl``
+      -  ``libpciaccess``: ``zlib``
+      -  ``gdk-pixbuf``: ``gif``, ``others``
+      -  ``libpam``: ``selinux``
+      -  ``libsecret``: ``pam``
+
 -  Miscellaneous changes:
 
+   -  ``bluez``: fix mesh build when building with musl.
+
+   -  ``systemd-bootchart``: now supports the 32-bit *riscv* architecture.
+
+   -  ``systemd-boot``: now supports the *riscv* architecture.
+
+   -  ``python3-pip``: the ``pip`` executable is now left and not deleted, and
+      can be used instead of ``pip3`` and ``pip2``.
+
+   -  ``tar`` image types are now more reproducible as the :term:`IMAGE_CMD` for
+      ``tar`` now strips ``atime`` and ``ctime`` from the archive content.
+
+   -  :term:`SOLIBSDEV` and :term:`SOLIBS` are now defined for the *mingw32*
+      architecture (``.dll``).
+
+   -  :ref:`rootfs-postcommands <ref-classes-rootfs*>`: make opkg status reproducible.
+
+   -  The default :term:`KERNEL_CONSOLE` value is no longer ``ttyS0`` but the
+      first entry from the :term:`SERIAL_CONSOLES` variable.
+
+   -  ``virglrenderer``: add a patch to fix ``-int-conversion`` build issue.
+
+   -  ``ffmpeg``: disable asm optimizations for the *x86* architecture as PIC is
+      required and *x86* ASM code is not PIC.
+
+   -  ``udev-extraconf``: fix the ``network.sh`` script that did not configure
+      hotplugged interfaces.
+
+   -  ``classes-global/license``: move several functions and logic to library
+      code in :oe_git:`meta/lib/oe/license.py </openembedded-core/tree/meta/lib/oe/license.py>`.
+
+   -  The recipe ``cairo`` now disables the features ``symbol-lookup``,
+      ``spectre`, and ``tests`` by default.
+
+   -  The recipe ``glib-2.0`` now disables the feature ``sysprof`` by default.
+
+   -  The recipe ``gstreamer1.0-libav`` now disables the feature ``doc`` by default.
+
+   -  ``rxvt-unicode``: change ``virtual/x-terminal-emulator`` from
+      :term:`PROVIDES` to :term:`RPROVIDES` as ``virtual-x-terminal-emulator``.
+      Also make this recipe depend on the ``x11`` distro features with
+      :term:`REQUIRED_DISTRO_FEATURES`.
+
+   -  ``rxvt-unicode.inc``: disable the ``terminfo`` installation by setting
+      ``TIC`` to ``:`` in :term:`EXTRA_OECONF`, to avoid host contamination.
+
+   -  ``matchbox-terminal``: add ``x-terminal-emulator`` as :term:`RPROVIDES`
+      and set :term:`ALTERNATIVE` for the recipe.
+
+   -  ``default-providers.conf``: set ``rxvt-unicode`` as the default
+      ``virtual-x-terminal-emulator`` runtime provider with
+      :term:`PREFERRED_RPROVIDER`.
+
+   -  ``systemd``: set better sane time at startup by creating the
+      ``clock-epoch`` file in ``${libdir}`` if the ``set-time-epoch``
+      :term:`PACKAGECONFIG` config is set.
+
+   -  ``cve-update-nvd2-native``: updating the database will now result in an
+      error if :term:`BB_NO_NETWORK` is enabled and
+      :term:`CVE_DB_UPDATE_INTERVAL` is not set to ``-1``.
+
+   -  ``systemtap``: add ``--with-extra-version="oe"`` configure option to
+      improve the reproducibility of the recipe.
+
+   -  ``python3``: package ``tkinter``'s shared objects separately in the
+      ``python3-tkinter`` package.
+
+   -  ``init-manager``: set the variable ``VIRTUAL-RUNTIME_dev_manager`` to
+      ``udev`` by default in
+      :oe_git:`meta/conf/distro/include/init-manager-none.inc
+      </openembedded-core/tree/meta/conf/distro/include/init-manager-none.inc>`
+      and :oe_git:`meta/conf/distro/include/init-manager-sysvinit.inc
+      </openembedded-core/tree/meta/conf/distro/include/init-manager-sysvinit.inc>`,
+      instead of :oe_git:`meta/recipes-core/packagegroups/packagegroup-core-boot.bb
+      </openembedded-core/tree/meta/recipes-core/packagegroups/packagegroup-core-boot.bb>`
+      only.
+
+      Likewise, the same is done for ``VIRTUAL-RUNTIME_keymaps`` with
+      ``keymaps`` as its default value.
+
+   -  ``seatd``: Create a ``seat`` group and package the systemd service
+      ``seatd.service`` with correct permissions.
+
+      That way, the ``weston`` user in ``weston-init.bb`` was added to the
+      ``seat`` group to be able to properly establish connection between the
+      Weston and the ``seatd`` socket.
+
+
 Known Issues in |yocto-ver|
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~