TF-M July 2021

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15 participants
43 discussions

Questions on Musca-B1 SE implementation - code size analysis

by Suresh.Marisetty＠infineon.com

Hi Mark, Wondering if someone can provide more visibility in the following in regards to the SE build with profile medium and large: 1. What ciphers are supported in medium vs. large (I see the size of the code bloats up almost twice from 30 to 60K approx) – observation from size of libmbedcrypto and libcrypto_service_cc312 – any clear documentation on this or a link would be helpful (besides code review) 2. When the SE is built for the large profile, assume it also includes “Software countermeasures against physical attacks” since it is offloading to the CC-312 * Is there a way to build the large profile without physical attack counter-measures? * While library are these countermeasures implemented in (libmbed or lib_cc312)? 3. On our initial analysis, for a medium profile these two libraries appears to be 30K-33K in size each and is this in the right ballpark? (with minsizerel) I assume the code size increase is due to additional cipher support + physical attack countermeasures. Correct me otherwise. thanks Suresh Marisetty Infineon Semiconductor Corporation From: Mark Horvath <Mark.Horvath(a)arm.com> Sent: Friday, May 14, 2021 5:30 AM To: Marisetty Suresh (CYSC CSS ICW SW SSE) <Suresh.Marisetty(a)infineon.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)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<https://goto.infineon.com/SocialEngineering>. Hi Suresh, Yes, by default the cc312 acceleration is turned on at build time for SE, and the algorithms will be handled by HW instead of the SW implementation. If you would like to use SW crypto instead you can pass the HW_ACCELERATOR="OFF" flag to cmake when building the SE TF-M instance. And here are the TF-M image sizes as of now with GCC in release mode: SE: ~185 KiB code flash and ~63 KiB RAM Host: ~22 KiB code flash and ~16 KiB RAM (a few more KiB needed for the images in flash for image header and trailer if loaded by mcuboot) Best regards, Mark ________________________________ From: David Hu <David.Hu(a)arm.com<mailto:David.Hu@arm.com>> Sent: Thursday, May 13, 2021 5:26 AM To: Suresh.Marisetty(a)infineon.com<mailto:Suresh.Marisetty@infineon.com> <Suresh.Marisetty(a)infineon.com<mailto:Suresh.Marisetty@infineon.com>>; Tamas Ban <Tamas.Ban(a)arm.com<mailto:Tamas.Ban@arm.com>>; tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> <tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>>; Mark Horvath <Mark.Horvath(a)arm.com<mailto:Mark.Horvath@arm.com>> Cc: nd <nd(a)arm.com<mailto:nd@arm.com>> Subject: RE: Questions on Musca-B1 SE implementation Hi @Mark Horvath<mailto:Mark.Horvath@arm.com>, Could you please help take a look at the following questions about Musca-B1 SE? Thanks 😊 Best regards, Hu Ziji From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Suresh Marisetty via TF-M Sent: Thursday, May 13, 2021 6:04 AM To: Tamas Ban <Tamas.Ban(a)arm.com<mailto:Tamas.Ban@arm.com>>; tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> Cc: nd <nd(a)arm.com<mailto:nd@arm.com>> Subject: Re: [TF-M] Questions on Musca-B1 SE implementation Hi Tamas, The following is good information. A few questions: 1. 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? 2. What is the size of the TFM on the host (M33) with only PSA RoT service proxy with redirection to SE 3. Just trying to understand the TFM image size requirements on M33 vs. SE 4. 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(a)arm.com<mailto:Tamas.Ban@arm.com>> Sent: Friday, April 30, 2021 12:40 AM To: Marisetty Suresh (CYSC CSS ICW SW SSE) <Suresh.Marisetty(a)infineon.com<mailto:Suresh.Marisetty@infineon.com>>; tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> Cc: nd <nd(a)arm.com<mailto: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<https://goto.infineon.com/SocialEngineering>. 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/e… 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/techn… BR, Tamas From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Suresh Marisetty via TF-M Sent: 2021. április 29., csütörtök 21:49 To: tf-m(a)lists.trustedfirmware.org<mailto: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/e… Any info on this would be appreciated. thanks Suresh Marisetty Infineon Semiconductor Corporation

2 years, 9 months

Re: [TF-M] How to build psa-arch-tests to debug mode with debug symbols

by Summer Qin

Hi Matt, Do you want to just build psa-arch tests alone? I check the psa-arch-tests build command documentation (api-tests/dev_apis/README.md), it doesn't mention '-DCMAKE_BUILD_TYPE'. Usually, we build it from TF-M side. It has debug symbols if you build from TF-M with '-DCMAKE_BUILD_TYPE=Debug'. Also, you can build debug variant through the DS-5 environment. It also works. BR, Summer ________________________________ From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> on behalf of Matt via TF-M <tf-m(a)lists.trustedfirmware.org> Sent: Thursday, July 1, 2021 9:11 AM To: tf-m(a)lists.trustedfirmware.org <tf-m(a)lists.trustedfirmware.org> Subject: [TF-M] How to build psa-arch-tests to debug mode with debug symbols Hi All experts, I want to build psa-arch-tests to debug mode with debug symbols. I have tried the following command, but it does not take effect. cmake ../ -G"<generator_name>" -DTARGET=<platform_name> -DCPU_ARCH=<cpu_architecture_version> -DCMAKE_BUILD_TYPE=Debug -DSUITE=<suite_name> -DPSA_INCLUDE_PATHS="<include_path1>;<include_path2>;...;<include_pathn>" cmake --build . How can I build psa-arch-tests to debug mode with debug symbols? Thanks, Matt

2 years, 9 months

How to build psa-arch-tests to debug mode with debug symbols

by Matt

Hi All experts, I want to build psa-arch-tests to debug mode with debug symbols. I have tried the following command, but it does not take effect. cmake ../ -G"<generator_name>" -DTARGET=<platform_name> -DCPU_ARCH=<cpu_architecture_version> -DCMAKE_BUILD_TYPE=Debug -DSUITE=<suite_name> -DPSA_INCLUDE_PATHS="<include_path1>;<include_path2>;...;<include_pathn>" cmake --build . How can I build psa-arch-tests to debug mode with debug symbols? Thanks, Matt

2 years, 10 months

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TF-M July 2021