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September 27-30, 2021
Seattle, Washington, USA + Virtual
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Wednesday, September 29 • 11:30am - 12:20pm
(VIRTUAL) OP-TEE: When Linux Loses Control - Clément Léger, Bootlin

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OP-TEE is an open-source Trusted Execution Environment designed to be executed in a secure context as a companion to a non secure Linux system. But what happens to the peripherals control since OP-TEE can forbid the non-secure OS to access them ? When running with a TEE, Linux isn't in charge anymore of some critical peripherals and relies on the TEE to access and configure them. There are multiple protocols and methods to access these peripherals that are supported by Linux (SCMI, PSCI, SMC). Supporting them for a SoC requires understanding the various interactions between the systems and how to modify them to fit that new control scheme. Additionally, the configuration must be passed from OP-TEE to Linux to allow a seamless integration. This talk will cover the boot process to start a secure system and the modifications needed to run Linux when OP-TEE is in charge of some peripherals. The work that has been done for a specific SoC will be described to have a tangible real-world use-case.
Speakers
avatar for Clément Léger

Clément Léger

Embedded Linux and kernel engineer, Bootlin
Clément Léger is an embedded Linux and kernel engineer at Bootlin. Prior to joining Bootlin, Clément has been working during 9 years in a semiconductor company named Kalray. He mainly worked on the Linux port for a VLIW architecture named KVX. This experience allowed him to see... Read More →

Wednesday September 29, 2021 11:30am - 12:20pm PDT
MeetingPlay Platform + Virtual Learning Lab
  Embedded Linux Conference (ELC), Device Tree & Related Technologies, Security