45 lines
1.8 KiB
ReStructuredText
45 lines
1.8 KiB
ReStructuredText
|
TF-A Platform Compatibility Policy
|
||
|
======================================================
|
||
|
|
||
|
|
||
|
.. section-numbering::
|
||
|
:suffix: .
|
||
|
|
||
|
.. contents::
|
||
|
|
||
|
--------------
|
||
|
|
||
|
Introduction
|
||
|
------------
|
||
|
|
||
|
This document clarifies the project's policy around compatibility for upstream
|
||
|
platforms.
|
||
|
|
||
|
Platform compatibility policy
|
||
|
-----------------------------
|
||
|
|
||
|
Platform compatibility is mainly affected by changes to Platform APIs (as
|
||
|
documented in the `Porting Guide`_), driver APIs (like the GICv3 drivers) or
|
||
|
library interfaces (like xlat_table library). The project will try to maintain
|
||
|
compatibility for upstream platforms. Due to evolving requirements and
|
||
|
enhancements, there might be changes affecting platform compatibility which
|
||
|
means the previous interface needs to be deprecated and a new interface
|
||
|
introduced to replace it. In case the migration to the new interface is trivial,
|
||
|
the contributor of the change is expected to make good effort to migrate the
|
||
|
upstream platforms to the new interface.
|
||
|
|
||
|
The `Release information`_ documents the deprecated interfaces and the intended
|
||
|
release after which it will be removed. When an interface is deprecated, the
|
||
|
page must be updated to indicate the release after which the interface will be
|
||
|
removed. This must be at least 1 full release cycle in future. For non-trivial
|
||
|
interface changes, a `tf-issue`_ should be posted to notify platforms that they
|
||
|
should migrate away from the deprecated interfaces. Platforms are expected to
|
||
|
migrate before the removal of the deprecated interface.
|
||
|
|
||
|
--------------
|
||
|
|
||
|
*Copyright (c) 2018, Arm Limited and Contributors. All rights reserved.*
|
||
|
|
||
|
.. _Porting Guide: ./porting-guide.rst
|
||
|
.. _Release information: https://github.com/ARM-software/arm-trusted-firmware/wiki/TF-A-Release-information#2removal-of-deprecated-interfaces
|
||
|
.. _tf-issue: https://github.com/ARM-software/tf-issues/issues
|