Cortex-M33 and Arm TrustZone ?

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Tabulous
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Cortex-M33 and Arm TrustZone ?

Postby Tabulous » Tue Nov 19, 2019 1:00 pm

Hi
is this something that is on the grape vine so to speak ?

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Giovanni
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Re: Cortex-M33 and Arm TrustZone ?

Postby Giovanni » Tue Nov 19, 2019 1:15 pm

I have definite plans for this, just waiting for the L5 to become available.

The general idea is to make a port to run RT/NIL in TZ as trusted OS on top of another OS running in non trusted mode (another RT/NIL or something else entirely).

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Re: Cortex-M33 and Arm TrustZone ?

Postby Tabulous » Tue Nov 19, 2019 1:41 pm

So between the two OS's running you have some kind of API ?

From the reading ive done its sounds like there will be a significant amount of complexity added

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Re: Cortex-M33 and Arm TrustZone ?

Postby Giovanni » Tue Nov 19, 2019 3:51 pm

Yes, the trusted OS would expose "services" to the non-trusted code.

The API will be very simple, just communication, each service would define its own API. Look at services as threads in TZ exposing something like a mailbox.

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Re: Cortex-M33 and Arm TrustZone ?

Postby Tabulous » Wed Nov 20, 2019 12:16 pm

When do you anticipate adding this be ?
Do you think within the next 6 months ?

NUCLEO-L552ZE-Q is already available

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Re: Cortex-M33 and Arm TrustZone ?

Postby Giovanni » Wed Nov 20, 2019 2:52 pm

It is pretty high priority, I will order the board ASAP. First we will have the normal RT/NIL/HAL support, TZ support will follow.

We also need OpenOCD support, I hope it will be available soon.

Giovanni


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