OP-TEE 2021官方文档：从入门到深入详解

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Optee,全称为Open Platform for Trusted Execution Environment (OP-TEE), 是一个开源项目，旨在提供一个安全的环境，使得设备中的敏感操作可以在可信的硬件隔离区域（TrustZone）内执行，确保数据隐私和完整性。这份2021年的官方文档提供了全面的指南，包括但不限于以下知识点： 1. 入门：文档从介绍OP-TEE的基本概念入手，帮助读者理解它的目的和应用场景，以及开发者应遵循的编码标准。 2. 贡献与联系：文档鼓励用户参与项目，提供了联系方式和如何提交代码的指导，这对于想参与社区开发的人来说至关重要。 3. 平台支持：文档详述了OP-TEE支持的多种平台类型，确保其兼容性和广泛的部署可能性。 4. 架构：深入讲解了OP-TEE的核心组件，如加密实现、设备树配置、文件结构组织，以及它如何与GlobalPlatform API交互。此外，还讨论了相关的库和移植指南，确保在不同平台上的一致性和可移植性。 5. 构建与运行：针对Android系统（AOSP）、设备特定信息、Linux内核中的TEE框架、Git仓库管理、预安装需求以及工具链配置等进行了详细介绍，以便开发者进行实际项目的构建和测试。 6. 调试技术：文档介绍了关键的调试方法，如异常处理（dump和callstack）、性能分析（benchmark框架）、系统级跟踪（ftrace）和代码性能分析（gprof），这些都是解决开发过程中遇到问题的重要手段。 7. 常见问题解答：这部分汇总了关于缩写、体系结构、硬件支持、编译流程、认证与安全审查以及贡献者指南等方面的常见问题，为用户提供了方便的查阅资源。这份文档是OP-TEE开发者的宝典，无论是初次接触OP-TEE的开发者还是经验丰富的专业人士，都能从中找到所需的信息来构建、优化和维护安全的可信执行环境。阅读和理解这些内容对于确保系统的安全性、稳定性和扩展性具有重要意义。

OP-TEE Documentation

– LAS16-504 - Secure Storage updates in OP-TEE (slides, video)

– LAS16-406 - Android Widevine on OP-TEE (slides, video)

– LAS16-111 - Easing Access to ARM TrustZone OP TEE and Raspberry Pi 3 (slides, video)

• BKK16

– BKK16-201 - PlayReady OP-TEE Integration with Secure Video Path (slides, video)

– BKK16-110 - A Gentle Introduction to Trusted Execution and OP-TEE (slides)

• SFO15

– SFO15-503 - Secure storage in OP-TEE (slides, video)

– SFO15-205 - OP-TEE Content Decryption with Microsoft PlayReady on ARM TrustZone (slides,

video)

– SFO15-200 - TEE kernel driver (slides, video)

• HKG15

– HKG15-311 - OP-TEE for Beginners and Porting Review (slides, video)

– HKG15-307 - OP-TEE pager (slides, video)

• LCU14

– LCU14-306 - OP-TEE Future Enhancements (slides)

– LCU14-302 - How to port OP-TEE to another platform (slides, video)

– LCU14-107 - OP-TEE on ARMv8-A (slides, video)

– LCU14-103 - How to create and run Trusted Applications on OP-TEE (slides, video)

• LCA14

– LCA14-502 - The way to a generic TrustZone solution (slides)

– LCA14-418 - Testing a secure framework (slides)

1.8 Releases

1.8.1 Cadence

New versions of OP-TEE are released four times a year, i.e., quarterly releases.

Release dates

Starting from version 3.10.0 we track the old and also show the releases being planned for the future in the table below.

The dates will tell whether it is an old, upcoming or future release.

Version Release date

OP-TEE 3.15.0 15/Oct/21

OP-TEE 3.14.0 16/July/21

OP-TEE 3.13.0 16/Apr/21

OP-TEE 3.12.0 20/Jan/21

OP-TEE 3.11.0 16/Oct/20

OP-TEE 3.10.0 21/Aug/20

12 Chapter 1. Getting started

OP-TEE Documentation

Long version

1. Create a “release pull request” at GitHub ought to collect Tested-By tags from various maintain-

ers. As an example, see PR#3099.

2. Send email to all maintainers to let them know about the upcoming release. The addresses to the

maintainers can be found in the MAINTAINERS ﬁle.

Hint: With this command you will get all email addresses

$ scripts/get_maintainer.py --release-to

3. Increment the revision number in mk/conﬁg.mk: CFG_OPTEE_REVISION_MAJOR and

CFG_OPTEE_REVISION_MINOR. These values are made available to TAs and to the Normal

World driver at boot time.

4. Create a release candidate (RC) tag (annotated tag, i.e., git tag -a 3.x.y-rc1 -m "3.x.

y-rc1") in the following gits optee_

and build.git. One way to do it is like this

$ export VER=3.x.y-rc1

$ for d in optee

build; do ( cd $d; git tag -a $VER -m $VER ); done

$ for d in optee

build; do ( cd $d; git push origin $VER ); done

5. Send a follow up email to all maintainers to let them know that there is a release tag ready to be

tested on their devices for the platforms that they are maintaining.

6. In case major regressions are found, then ﬁx those and create a another release candidate tag (i.e.,

repeat step 3 and 4 until there are no remaining issues left).

7. On release day: Update CHANGELOG.md see this changelog example to see how that should look

like.

8. Collect all tags (Tested-By etc) from maintainers and use those in the commit message, for an

example see this commit example.

9. Create a release tag (annotated tag, i.e., git tag -a 3.x.y -m "3.x.y") in the following

gits optee_

and build.git. Tag the tip of the optee branch in linux.git, the name of the

tag has to be preﬁxed with optee- to avoid confusions. For instance: git tag -a optee-3.

x.y -m "optee-3.x.y".

Hint: You can use the same steps as in step 4, when creating the tags.

10. Create a new branch in manifest from master where the name corresponds to the release you are

preparing. I.e., git checkout -b 3.x.y origin/master.

11. Update all manifest XML-ﬁles in the manifest git, so they refer to the tag in the release we are

working with (see 3.6.0 stable commit as an example). This can be done with the make_stable.sh

script. Now it is also time to push the new branch and tag it. Example:

$ export VER=3.x.y

$ cd manifest

$ ./make_stable.sh -o -r $VER

$ git diff # make sure everything looks good

$ git commit -a -m "OP-TEE $VER stable"

$ git remote add upstream git@github.com:OP-TEE/manifest

$ git push upstream

(continues on next page)

1.8. Releases 15

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