Add a document to list supported Yocto features

Add a "Yocto Project Supported Architectures And Features" document that
aims at:

- Defining the different levels of support for features
- Listing the maintainers for a feature
- Listing the existing builders on the Autobuilder for the feature

Co-developed-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Yocto TSC <tsc@lists.yoctoproject.org>
(From yocto-docs rev: 197f28439c44e3fb7507f97be57a0c94be4a8eed)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/index.rst

@@ -11,6 +11,7 @@ Yocto Project Reference Manual
    :numbered:
 
    system-requirements
+   yocto-project-supported-features
    terms
    release-process
    structure

documentation/ref-manual/yocto-project-supported-features.rst

@@ -0,0 +1,263 @@
+.. SPDX-License-Identifier: CC-BY-SA-2.0-UK
+
+**************************************************
+Yocto Project Supported Architectures And Features
+**************************************************
+
+The Yocto Project is putting continuous efforts into testing the changes made to
+the :term:`OpenEmbedded-Core (OE-Core)` metadata and core tools. The details on
+how this test environment functions is described in the
+:doc:`/test-manual/index`.
+
+These tests are also run for stable and :term:`LTS` versions of the Yocto
+Project. See the :doc:`/ref-manual/release-process` section of the Yocto Project
+Reference Manual for more information on these types of releases.
+
+The infrastructure behind the test environment is the
+:ref:`Yocto Project Autobuilder <test-manual/intro:Yocto Project Autobuilder
+Overview>`. The Autobuilder contains a set of Builders that are associated to an
+architecture or a feature to test. For example, the ``qemuarm64`` builder
+corresponds to testing the ARM 64-bit architecture.
+
+Below is a comprehensive list of target architectures and features that are
+supported, as well as their level of support. For each architecture or feature,
+their corresponding builders are also listed.
+
+Primary Supported
+=================
+
+The term "primary" means that dedicated builds for these architectures or
+features are being run on a daily basis on the Yocto Project Autobuilder and
+also tested with incoming changes before they merge. These changes are usually
+on the "-next" Git branches of the :term:`OpenEmbedded-Core (OE-Core)`
+repositories.
+
+Below is a list of primary tested features, their maintainer(s) and builder(s):
+
+.. list-table::
+   :widths: 20 20 20 40
+   :header-rows: 1
+
+   * - Feature
+     - Description
+     - Maintainer(s)
+     - Builder(s)
+   * - :wikipedia:`ARM <ARM_architecture_family>`
+     - ARM architecture testing
+     - Collective effort
+     - genericarm64,
+       genericarm64-alt,
+       musl-qemuarm64,
+       qemuarm,
+       qemuarm-alt,
+       qemuarm-oecore,
+       qemuarm-tc,
+       qemuarm64,
+       qemuarm64-alt,
+       qemuarm64-armhost,
+       qemuarm64-ltp,
+       qemuarm64-ptest,
+       qemuarm64-tc,
+       qemuarmv5
+   * - :yocto_git:`Beaglebone </poky/tree/meta-yocto-bsp/conf/machine/beaglebone-yocto.conf>`
+     - Beaglebone image and SDK build testing
+     - Collective effort
+     - beaglebone,
+       beaglebone-alt
+   * - :doc:`Reproducible </test-manual/reproducible-builds>`
+     - reproducibility testing
+     - Collective effort
+     - reproducible
+   * - :term:`Buildtools`
+     - Buildtools generation
+     - Collective effort
+     - buildtools
+   * - `meta-agl-core <https://gerrit.automotivelinux.org/gerrit/AGL/meta-agl>`__
+     - meta-agl-core layer testing
+     - TBD
+     - meta-agl-core
+   * - `meta-arm <https://git.yoctoproject.org/meta-arm>`__
+     - meta-arm layer testing
+     - TBD
+     - meta-arm
+   * - `meta-aws <https://github.com/aws4embeddedlinux/meta-aws>`__
+     - meta-aws layer testing
+     - TBD
+     - meta-aws
+   * - `meta-intel <https://git.yoctoproject.org/meta-intel>`__
+     - meta-intel layer testing
+     - TBD
+     - meta-intel
+   * - `meta-virtualization <https://git.yoctoproject.org/meta-virtualization/>`__
+     - meta-virtualization layer testing
+     - TBD
+     - meta-virt
+   * - :ref:`Multilib <dev-manual/libraries:Combining Multiple Versions of Library Files into One Image>`
+     - Multilib feature testing
+     - Collective effort
+     - multilib
+   * - :term:`OpenEmbedded-Core selftest<OpenEmbedded-Core (OE-Core)>`
+     - OpenEmbedded-Core layers selftests
+     - Collective effort
+     - oe-selftest-fedora,
+       oe-selftest-debian,
+       oe-selftest-armhost
+   * - Package managers
+     - Package managers (RPM, DEB and IPK formats) testing in the
+       :term:`OpenEmbedded Build System` (different from the
+       ``package-management`` :term:`image feature <IMAGE_FEATURES>`)
+     - Collective effort
+     - pkgman-non-rpm (other builders use RPM by default)
+   * - :ref:`Patchtest <contributor-guide/submit-changes:Validating Patches with Patchtest>`
+     - Patchtest tool selftests
+     - TBD
+     - patchtest-selftest
+   * - :wikipedia:`RISC-V (64-bit) <RISC-V>`
+     - RISC-V architecture testing (64-bit)
+     - Collective effort
+     - qemuriscv64,
+       qemuriscv64-ptest,
+       qemuriscv64-tc
+   * - :wikipedia:`systemd <Systemd>`
+     - Systemd init manager testing
+     - Collective effort
+     - no-x11, qa-extras2
+   * - :term:`Toaster`
+     - Toaster web interface testing
+     - Collective effort
+     - toaster
+   * - :ref:`Wic <dev-manual/wic:creating partitioned images using wic>`
+     - WIC image creation testing
+     - Collective effort
+     - wic
+   * - :wikipedia:`X86 <X86>`
+     - X86 architecture testing
+     - Collective effort
+     - genericx86,
+       genericx86-64,
+       genericx86-64-alt,
+       genericx86-alt,
+       musl-qemux86,
+       musl-qemux86-64,
+       qemux86,
+       qemux86-64,
+       qemux86-64-alt,
+       qemux86-64-ltp,
+       qemux86-64-ptest,
+       qemux86-64-tc,
+       qemux86-64-x32,
+       qemux86-alt,
+       qemux86-tc,
+       qemux86-world,
+       qemux86-world-alt
+
+Secondary Supported
+===================
+
+The term "secondary" means that in some cases there is code/feature/support
+which is desired by people using the project and is in the project's interests
+to support, however there isn't wide enough interest and support to justify
+testing all incoming changes on it. There are however project member
+organisations and maintainers willing to run tests and review fixes.
+
+This category may be applicable as support/usage in an area develops and grows,
+or as support/usage fades but we continue to have tests. It can also apply where
+resourcing isn't available for full primary support but there is
+member/maintainer support for running tests.
+
+We therefore have the following criteria and policies for such items:
+
+-  It can be clearly isolated and defined by specific configuration.
+
+-  There is a clear documented group of maintainers agreeing to maintain it.
+
+-  Those maintainers are active and responsive.
+
+-  It is being actively and publicly tested (potentially using
+   the :ref:`Autobuilder <test-manual/intro:Yocto Project Autobuilder Overview>`
+   by agreement, or otherwise).
+
+-  Testing would not be part of standard incoming change testing and regressions
+   would not block incoming patches.
+
+-  The :yocto_wiki:`SWAT </Yocto_Build_Failure_Swat_Team>` team would not handle
+   any test builds on the Autobuilder.
+
+-  Test results can be submitted as part of the release process if desired.
+
+The Yocto Project :oe_wiki:`Technical Steering Committee (TSC) </TSC>` makes
+decisions on features in this status and Autobuilder testing. Such support would
+be dropped if the maintainers/testing were inactive.
+
+If you are interested in providing resources for improving testing please
+contact the :oe_wiki:`Technical Steering Committee (TSC) </TSC>`.
+
+Below is a list of secondary tested features, their maintainer(s) and
+builder(s):
+
+.. list-table::
+   :widths: 20 20 20 40
+   :header-rows: 1
+
+   * - Feature
+     - Description
+     - Maintainer(s)
+     - Builder(s)
+   * - :wikipedia:`PowerPC (32-bit) <PowerPC>`
+     - PowerPC architecture testing (32-bit)
+     - TBD
+     - qemuppc,
+       qemuppc-alt,
+       qemuppc-tc
+   * - :oe_git:`meta-openembedded </meta-openembedded>`
+     - meta-openembedded layer testing
+     - TBD
+     - meta-oe
+   * - `meta-mingw <https://git.yoctoproject.org/meta-mingw>`__
+     - mingw based SDKs testing
+     - TBD
+     - meta-mingw
+   * - `meta-webosose <https://github.com/webosose/meta-webosose>`__
+     - meta-webosose layer testing
+     - TBD
+     - meta-webosose
+   * - :wikipedia:`RISC-V (32-bit) <RISC-V>`
+     - RISC-V architecture testing (32-bit)
+     - Collective effort
+     - qemuriscv32,
+       qemuriscv32,
+       qemuriscv32-tc
+
+Untested
+========
+
+"Untested" means that whilst the configurations are present in the project, we
+don't currently run the tests on any regular basis and new changes are not
+tested against them. We may take patches in these areas if they make sense but
+it is on a best effort only basis.
+
+.. list-table::
+   :widths: 20 20 20 40
+   :header-rows: 1
+
+   * - Feature
+     - Description
+     - Maintainer(s)
+     - Builder(s)
+   * - `meta-exein <https://github.com/exein-io/meta-exein>`__
+     - meta-exein layer testing
+     - TBD
+     - meta-exein
+   * - :wikipedia:`MIPS <MIPS_architecture>`
+     - MIPS architecture testing
+     - No maintainers
+     - qemumips,
+       qemumips64,
+       qemumips-alt,
+       qemumips-tc,
+       qemumips64-tc
+   * - :wikipedia:`PowerPC (64-bit) <PowerPC>`
+     - PowerPC architecture testing (64-bit)
+     - No maintainers
+     - qemuppc64,
+       qemuppc64-tc