Define docs structure for environments
Adds an extensible structure for documents related to secure processing
environments. The only class of environment currently represented is
Secure Partitions. This change adds a structure to support general
FF-A documents as well as op-tee and hafnium specific documents.
Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: Ic2fdd792580d711091435716e4b9c863df424149
diff --git a/docs/environments/secure-partitions/index.rst b/docs/environments/secure-partitions/index.rst
index 9ab70d1..d57b103 100644
--- a/docs/environments/secure-partitions/index.rst
+++ b/docs/environments/secure-partitions/index.rst
@@ -1,16 +1,40 @@
Secure Partitions
=================
+:term:`Secure Partitions<Secure Partition>` are defined by the :term:`FF-A` standard
+
+Secure partitions are isolated processing environments managed by a Secure Partition Manager (SPM).
+An SPM performs the role of hypervisor for the Arm Secure state and is responsible for managing
+SP initialization, memory management and messaging. The Arm Firmware Framework for A-Profile (FF-A)
+specification (`FF-A Specification`_) defines the set of firmware features that enable the use of
+secure partitions for protecting sensitive workloads.
+
+The Armv8.4 architecture introduces the virtualization extension in the Secure state. For silicon
+based on Armv8.4 (or above) that implement the Secure-EL2 extension, the `Hafnium Project`_
+provides a reference SPM implementation. For pre-Arm8.4 silicon, the `OP-TEE Project`_ provides
+an alternative reference SPM implementation.
+
+Within the Trusted Services, the environments realized by the two reference SPM implementations
+are named as follows:
+
+ * *hfsp* - for service deployment under Hafnium
+ * *opteesp* - for service deployment under OP-TEE
+
.. toctree::
:maxdepth: 1
:caption: Contents:
+ ff-a/index
+ spm/optee/index
+ spm/hafnium/index
libsp
- userspace-programs-on-fvp
- opteesp-deployment-guide
--------------
+.. _`FF-A Specification`: https://developer.arm.com/documentation/den0077/latest
+.. _`Hafnium Project`: https://www.trustedfirmware.org/projects/hafnium/
+.. _`OP-TEE Project`: https://www.trustedfirmware.org/projects/op-tee/
+
*Copyright (c) 2020-2022, Arm Limited and Contributors. All rights reserved.*
SPDX-License-Identifier: BSD-3-Clause