.. _docs/totalcompute/tc1/release_notes:


.. include:: ../tc_obsolete_version_warn.rst


Release notes - 2021.08.17
==========================

.. contents::

Release tag
-----------
The manifest tag for this release is TC1-2021.08.17

Components
----------
The following is a summary of the key software features of the release:
 - Yocto based BSP build supporting Android and Poky distro.
 - Trusted firmware-A for secure boot.
 - System control processor(SCP) firmware for programming the interconnect, doing power control etc.
 - U-Boot bootloader.
 - Hafnium for S-EL2 Secure Partition Manager core.
 - OP-TEE for Trusted Execution Environment (TEE).
 - Crypto and Storage Trusted Services running at S-EL0.

Hardware Features
-----------------
 - Booker CI with Memory Tagging Unit(MTU) support driver in SCP firmware.
 - GIC Clayton Initialization in Trusted Firmware-A.
 - Mali-D71 DPU and virtual encoder support for display in Linux.
 - MHUv2 Driver for SCP and AP communication.
 - UARTs, Timers, Flash, PIK, Clock drivers.
 - PL180 MMC.
 - DynamIQ Shared Unit (DSU) with 8 cores. 1 Makalu ELP + 3 Makalu + 4 Cortex-A510 (R1) cores configuration.

Software Features
-----------------
 - Poky Distribution support.
 - Android AOSP Support (May21).
 - Android Common Kernel 5.10 with PAC/BTI/MTE
 - Trusted Firmware-A & Hafnium v2.5
 - OP-TEE 3.14.0
 - Support secure boot based on TBBR specification https://developer.arm.com/documentation/den0006/latest
 - System Control Processor (SCP) firmware v2.8
 - Build system based on Yocto master
 - U-Boot bootloader v2021.07
 - Power management features: cpufreq and cpuidle.
 - SCMI (System Control and Management Interface) support.
 - Verified u-boot for authenticating fit image (containing kernel + ramdisk) during poky boot.
 - Android Verified Boot (AVB) for authenticating boot and system image during Android boot.
 - Software rendering on Android with DRM Hardware Composer offloading composition to Mali D71 DPU.
 - Hafnium as Secure Partition Manager (SPM) at S-EL2.
 - OP-TEE as Secure Partition at S-EL1, managed by S-EL2 SPMC (Hafnium)
 - Arm FF-A driver and FF-A Transport support for OP-TEE driver in Android Common Kernel.
 - OP-TEE Support in Poky distribution. This includes OP-TEE client and OP-TEE test suite.
 - Crypto and Storage Trusted Services running at S-EL0.
 - Trusted Services test suite added to poky distribution.
 - Shim Layer at S-EL1 running on top of S-EL2 SPMC (Hafnium) used by Trusted Services running in S-EL0.

Platform Support
----------------
 - This Software release is tested on TC1 Fast Model platform (FVP).
   - Supported Fast model version for this release is 11.15.20

Known issues or Limitations
---------------------------
1. At the U-Boot prompt press enter and type "boot" to continue booting else wait
   for ~15 secs for boot to continue automatically. This is because of the time
   difference in CPU frequency and FVP operating frequency.
2. OP-TEE test suite xtest, fails for Storage concurrency test case. This issue is under investigation.


Support
-------
For support email:  support-arch@arm.com

--------------

*Copyright (c) 2021, Arm Limited. All rights reserved.*