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Hi guys,
let me shortly note, that we currently evaluate a Google Summer of Code proposal in the lowRISC project where one possible path is to port OP-TEE on top of seL4. Please contact me if you are interested.
Cheers, Stefan
On 20.04.2016 00:50, Corey Richardson wrote:
On Mon, Apr 18, 2016 at 02:08:12PM +0800, XilongPei wrote:
Google has release its Trusty OS for Android,
An operating system (the Trusty OS) that runs on a processor intended to provide a TEE
https://source.android.com/security/trusty/index.html
If I replace the Android's Trusty OS with seL4, what should I do, and what benefits can I get?
You need to take a wider view of what Trusty is, how it fits into Android, and what it provides.
Trusty is a "TEE", the OS that runs in the secure world on ARM TrustZone-compatible platforms. See the recent thread about TrustZone and seL4 in general:
http://sel4.systems/pipermail/devel/2016-March/000746.html
In particular, Trusty is an application on the LK kernel. seL4 here would replace LK, not Trusty.
Trusty itself seemingly only provides IPC between "secure" apps and non-"secure" apps (including processes in Linux via virtio and SMCs).
To replace Trusty you'd need to implement a Trusty-compatible ABI, convince a bootloader to load seL4 as the TEE OS, and do the appropriate initialization so that the existing Linux driver and apps work. The kernel might need modification to support handling SMCs.
As for the benefits, see the FAQ:
https://wiki.sel4.systems/FrequentlyAskedQuestions#What_is_formal_veri
fication.3F
and make your own opinion after inspecting the existing Trusty
apps and considering possible system designs.