d9e984cc30
Adding the newly introduced build flags for feature enablement of the following features: 1.FEAT_AMUv1p1 - ENABLE_FEAT_AMUv1p1 2.FEAT_CSV2_2 - ENABLE_FEAT_CSV2_2 3.FEAT_VHE - ENABLE_FEAT_VHE 4.FEAT_DIT - ENABLE_FEAT_DIT 5.FEAT_SB - ENABLE_FEAT_SB 6.FEAT_SEL2 - ENABLE_FEAT_SEL2 Also as part of feature detection mechanism, we now support three states for each of these features, allowing the flags to take either (0 , 1 , 2) values. Henceforth the existing feature build options are converted from boolean to numeric type and is updated accordingly in this patch. The build flags take a default value and will be internally enabled when they become mandatory from a particular architecture version and upwards. Platforms have the flexibility to overide this internal enablement via this feature specific explicit build flags. Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com> Change-Id: I0090c8c780c2e7d1a50ed9676983fe1df7a35e50 |
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readme.rst
Trusted Firmware-A
Trusted Firmware-A (TF-A) is a reference implementation of secure world software for Arm A-Profile architectures (Armv8-A and Armv7-A), including an Exception Level 3 (EL3) Secure Monitor. It provides a suitable starting point for productization of secure world boot and runtime firmware, in either the AArch32 or AArch64 execution states.
TF-A implements Arm interface standards, including:
- Power State Coordination Interface (PSCI)
- Trusted Board Boot Requirements CLIENT (TBBR-CLIENT)
- SMC Calling Convention
- System Control and Management Interface (SCMI)
- Software Delegated Exception Interface (SDEI)
The code is designed to be portable and reusable across hardware platforms and software models that are based on the Armv8-A and Armv7-A architectures.
In collaboration with interested parties, we will continue to enhance TF-A with reference implementations of Arm standards to benefit developers working with Armv7-A and Armv8-A TrustZone technology.
Users are encouraged to do their own security validation, including penetration testing, on any secure world code derived from TF-A.
More Info and Documentation
To find out more about Trusted Firmware-A, please view the full documentation that is available through trustedfirmware.org.
Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.