Hi Tamas,

The following is good information. A few questions:

Is it correct to state that for the SE, the PSA RoT services do not have any software Crypto implementation, but leverage from CC-312?
What is the size of the TFM on the host (M33) with only PSA RoT service proxy with redirection to SE
Just trying to understand the TFM image size requirements on M33 vs. SE
How much of the Flash region/code Executed In Place vs. execution out of SRAM (XIP)

thanks

Suresh Marisetty

Infineon Semiconductor Corporation

From: Tamas Ban <Tamas.Ban@arm.com>
Sent: Friday, April 30, 2021 12:40 AM
To: Marisetty Suresh (CYSC CSS ICW SW SSE) <Suresh.Marisetty@infineon.com>; tf-m@lists.trustedfirmware.org
Cc: nd <nd@arm.com>
Subject: RE: Questions on Musca-B1 SE implementation

Caution: This e-mail originated outside Infineon Technologies. Do not click on links or open attachments unless you validate it is safe.

Hi Suresh,

Here is a link how to build images to Musca-B1 SE:
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/platform/ext/target/musca_b1/secure_enclave/readme.rst

I have built with GCC and MinSizeRel build type:

Profile Medium:

Memory region Used Size Region Size %age Used

FLASH: 101464 B 381 KB 26.01%

RAM: 61304 B 64 KB 93.54%

[100%] Built target tfm_s

Profile Large:
Memory region Used Size Region Size %age Used

FLASH: 170448 B 381 KB 43.69%

RAM: 62980 B 64 KB 96.10%

[ 97%] Built target tfm_s

The profiles means different capabilities of TF-M, they were introduced to support constrained devices as well, with limited capability.

There is a detailed description about the profiles here:

https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/technical_references/profiles

BR,

Tamas

From: TF-M <tf-m-bounces@lists.trustedfirmware.org> On Behalf Of Suresh Marisetty via TF-M
Sent: 2021. április 29., csütörtök 21:49
To: tf-m@lists.trustedfirmware.org
Subject: [TF-M] Questions on Musca-B1 SE implementation

I am following up on a question that came up on the TFM Core and MCUBoot image sizes that is built for SE on Musca-B1.

We are trying to figure out the resource requirements for SE, to be able to host the TF-M as suggested in the slides below. Wondering if anyone throw more light on the RAM/FLASH requirements for it.

Also, does the TFM profile small/medium/large map to this at all or is it different from them. Also, what’s are the estimated latencies of boot on SE with all the Flash accesses, etc.

https://www.trustedfirmware.org/docs/Musca-B1-Secure-Enclave-Solution.pdf

https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/platform/ext/target/musca_b1/secure_enclave

Any info on this would be appreciated.

thanks

Suresh Marisetty

Infineon Semiconductor Corporation