edbce9aad4
This patch enables LTO for TF-A when compiled with GCC. LTO is disabled by default and is enabled by ENABLE_LTO=1 build option. LTO is enabled only for aarch64 as there seem to be a bug in the aarch32 compiler when LTO is enabled. The changes in the makefiles include: - Adding -flto and associated flags to enable LTO. - Using gcc as a wrapper at link time instead of ld. This is recommended when using LTO as gcc internally takes care of invoking the necessary plugins for LTO. - Adding switches to pass options to ld. - Adding a flag to disable fix for erratum cortex-a53-843419 unless explicitly enabled. This is needed because GCC seem to automatically add the erratum fix when used as a wrapper for LD. Additionally, this patch updates the TF-A user guide with the new build option. Signed-off-by: zelalem-aweke <zelalem.aweke@arm.com> Change-Id: I1188c11974da98434b7dc9344e058cd1eacf5468 |
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| drivers | ||
| fdts | ||
| include | ||
| lib | ||
| make_helpers | ||
| plat | ||
| services | ||
| tools | ||
| .checkpatch.conf | ||
| .editorconfig | ||
| .gitignore | ||
| Makefile | ||
| dco.txt | ||
| license.rst | ||
| readme.rst | ||
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.