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Re: [TF-M] Sending events from TF-M to non-secure world?

by Li, Jun R

Hi Ken, Thanks for the nice suggestions! I was thinking of using an interrupt from TF-M to NS world as well but that needs some hardware support, which should be fine since I'm still designing the device. Maybe there is a software interrupt solution? Our application needs to put a biometric service inside TF-M and its enrollment process needs to send out some intermediate events to give the user some feedbacks. This is why I'm asking this question. I think TF-M can use an input buffer from NS world to store the new events and notify the NS world with the interrupt to fetch the new events. Sounds good? Regards, Jun On 10/19/21, 00:23, "TF-M on behalf of tf-m-request(a)lists.trustedfirmware.org" <tf-m-bounces(a)lists.trustedfirmware.org on behalf of tf-m-request(a)lists.trustedfirmware.org> wrote: Send TF-M mailing list submissions to tf-m(a)lists.trustedfirmware.org To subscribe or unsubscribe via the World Wide Web, visit https://lists.trustedfirmware.org/mailman/listinfo/tf-m or, via email, send a message with subject or body 'help' to tf-m-request(a)lists.trustedfirmware.org You can reach the person managing the list at tf-m-owner(a)lists.trustedfirmware.org When replying, please edit your Subject line so it is more specific than "Re: Contents of TF-M digest..." Today's Topics: 1. Re: Sending events from TF-M to non-secure world? (Ken Liu) 2. Inline asm syntax unified and symbol reference in IAR toolchain (Ken Liu) ---------------------------------------------------------------------- Message: 1 Date: Tue, 19 Oct 2021 02:06:35 +0000 From: Ken Liu <Ken.Liu(a)arm.com> To: "tf-m(a)lists.trustedfirmware.org" <tf-m(a)lists.trustedfirmware.org> Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] Sending events from TF-M to non-secure world? Message-ID: <DB9PR08MB67613655A2ACA207C751C791F5BD9(a)DB9PR08MB6761.eurprd08.prod.outlook.com> Content-Type: text/plain; charset="utf-8" Hi Jun, Basically, the service accessing model is a client-service model, hence the service won't call back to the client which makes the client a 'service'. Service can get client info by passed-in parameters and other SPM controlled channels. Assuming you are using a Trustzone based hardware, the hardware provides the capability that calling back to NSPE, but it is not encouraged inside TF-M because it breaks the simplified model proposed by FF-M and difficulties the secure threat analysis - a simple case is that the secure context is blocked because it is waiting for NS returns. If you do need to perform such operations, implement an interrupt based asynchronous mechanism is safer than software callbacks. The most queried requirement we have met is someone querying if the execution can be delivered back to NSPE when secure IDLE is going to happen. Not sure if you are facing the similar, is it okay to share more details? BR /Ken From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Li, Jun R via TF-M Sent: Tuesday, October 19, 2021 12:20 AM To: tf-m(a)lists.trustedfirmware.org Subject: [TF-M] Sending events from TF-M to non-secure world? Hi, Anyone has idea how a service inside a secure partition can send out some events to the non-secure world? Does callback still work over IPC? It seems non-secure world can connect to a SP but not easy to do the other way. Appreciate any comments or suggestions! Jun Intel Corporation @ SC, CA -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.trustedfirmware.org/pipermail/tf-m/attachments/20211019/1ff875…>

4 years, 2 months

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Re: [TF-M] Enablement of external bl2 builds

by Bohdan.Hunko＠infineon.com

Hi Sherry, So I actually checked issue from last mail ‘When building TFM with CRYPTO_HW_ACCELERATOR=ON and BL2=OFF I am getting this error:’ and turns out everything is fine in master branch, that error is only present in my local branch due to changes I have made. I am glad we have one bug less 😊 Sorry for wrong report. Best regards, Bohdan Hunko Cypress Semiconductor Ukraine Engineer CSUKR CSS ICW SW FW Mobile: +38099 50 19 714 Bohdan.Hunko(a)infineon.com<mailto:Bohdan.Hunko@infineon.com> From: Hunko Bohdan (CSUKR CSS ICW SW FW) Sent: 01 October 2021 12:49 To: Hunko Bohdan (CSUKR CSS ICW SW FW) <Bohdan.Hunko(a)infineon.com>; Sherry.Zhang2(a)arm.com; Brand Chris (CSCA CSS ICW SW PSW 1) <Chris.Brand(a)infineon.com>; Kytsun Hennadiy (CSUKR CSS ICW SW FW) <Hennadiy.Kytsun(a)infineon.com>; Mazurak Roman (CSUKR CSS ICW SW FW) <Roman.Mazurak(a)infineon.com>; Tkachov Kostiantyn (CSUKR CSS ICW SW FW) <Kostiantyn.Tkachov(a)infineon.com> Cc: nd(a)arm.com Subject: RE: Enablement of external bl2 builds Hi all, One more thing on this topic. There is one more issue with building TFM without BL2. When building TFM with CRYPTO_HW_ACCELERATOR=ON and BL2=OFF I am getting this error: CMake Error at platform/ext/accelerator/CMakeLists.txt:11 (add_library): No SOURCES given to target: bl2_crypto_hw So I think this is one more thing that needs to be fixed. Best regards, Bohdan Hunko Cypress Semiconductor Ukraine Engineer CSUKR CSS ICW SW FW Mobile: +38099 50 19 714 Bohdan.Hunko(a)infineon.com<mailto:Bohdan.Hunko@infineon.com> From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Bohdan Hunko via TF-M Sent: 30 September 2021 17:34 To: Sherry.Zhang2(a)arm.com<mailto:Sherry.Zhang2@arm.com>; tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>; Brand Chris (CSCA CSS ICW SW PSW 1) <Chris.Brand(a)infineon.com<mailto:Chris.Brand@infineon.com>>; Kytsun Hennadiy (CSUKR CSS ICW SW FW) <Hennadiy.Kytsun(a)infineon.com<mailto:Hennadiy.Kytsun@infineon.com>>; Mazurak Roman (CSUKR CSS ICW SW FW) <Roman.Mazurak(a)infineon.com<mailto:Roman.Mazurak@infineon.com>>; Tkachov Kostiantyn (CSUKR CSS ICW SW FW) <Kostiantyn.Tkachov(a)infineon.com<mailto:Kostiantyn.Tkachov@infineon.com>> Cc: nd(a)arm.com<mailto:nd@arm.com> Subject: Re: [TF-M] Enablement of external bl2 builds Caution: This e-mail originated outside Infineon Technologies. Do not click on links or open attachments unless you validate it is safe<https://intranet-content.infineon.com/explore/aboutinfineon/rules/informati…>. Hi Sherry, Thanks for patching MCUBOOT_IMAGE_NUMBER issue. It was one of the issues we faced with. I also agree that mcuboot_config.h should be taken from our BL2 repo. So no changes needed there. About porting files (tfm/bl2 folder). We are planning to use existing porting files. But as you said currently they are not included into the build because BL2=0. So this needs to be fixed to include these porting files when TFM_PARTITION_FIRMWARE_UPDATE is ON. One minor issue we have is BOOT_DATA_AVAILABLE currently it is only defined if BL2=1 and MCUBOOT_MEASURED_BOOT=1. See this line of code<https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/secure_fw/…>. I think we can either change that line of code or we can defile BOOT_DATA_AVAILABLE in our platform files using add_definitions(-DBOOT_DATA_AVAILABLE). First way is a bit harder but I thinks it fits better into TFM architecture. Second way is easier but it seems more like workaround than like solution. Do you have any suggestions about this problem? We are not blocked by these issues, so no worries here. Best regards Bohdan Hunko Cypress Semiconductor Ukraine Engineer CSUKR CSS ICW SW FW Mobile: +38099 50 19 714 Bohdan.Hunko(a)infineon.com<mailto:Bohdan.Hunko@infineon.com> From: Sherry Zhang <Sherry.Zhang2(a)arm.com<mailto:Sherry.Zhang2@arm.com>> Sent: 30 September 2021 11:38 To: tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>; Tkachov Kostiantyn (CSUKR CSS ICW SW FW) <Kostiantyn.Tkachov(a)infineon.com<mailto:Kostiantyn.Tkachov@infineon.com>>; Mazurak Roman (CSUKR CSS ICW SW FW) <Roman.Mazurak(a)infineon.com<mailto:Roman.Mazurak@infineon.com>>; Kytsun Hennadiy (CSUKR CSS ICW SW FW) <Hennadiy.Kytsun(a)infineon.com<mailto:Hennadiy.Kytsun@infineon.com>>; Hunko Bohdan (CSUKR CSS ICW SW FW) <Bohdan.Hunko(a)infineon.com<mailto:Bohdan.Hunko@infineon.com>> Cc: nd <nd(a)arm.com<mailto:nd@arm.com>> Subject: RE: Enablement of external bl2 builds Caution: This e-mail originated outside Infineon Technologies. Do not click on links or open attachments unless you validate it is safe<https://intranet-content.infineon.com/explore/aboutinfineon/rules/informati…>. Hi Bohdan, I tried to build TF-M with FWU service without BL2 with the following command(FWU enabled with shared data while no BL2): cmake -S . -B cmake_build -DTFM_PLATFORM=arm/musca_b1/sse_200 -DCRYPTO_HW_ACCELERATOR=OFF -DPLATFORM_DUMMY_NV_SEED=ON -DBL2=0 -DMCUBOOT_PATH=../mcuboot The following issues I met: 1. Build time error by that ` MCUBOOT_IMAGE_NUMBER ` is passed as an empty macro into the flash_layout.h I have created a patch to fix it. https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/11729 1. Build error in ` bootutil_public.c `. The mcuboot_config.h which is generated automatically when the BL2=ON is not found. Also the files( in tf-m/bl2 folder) about porting MCUboot into TF-M is not found by the build system as BL2=0. For the config file, I think, it should be imported from your specific MCUboot repo as it is generated when BL2 image is built. For the MCUboot porting files, are you using the files under tf-m/bl2 folder or using your specific porting files? The FWU service needs the porting source files. See code at https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/secure_fw/…. Are your blocked by these two issues? Can you share the detailed issue you met if there is more? Regards, Sherry From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Bohdan Hunko via TF-M Sent: Tuesday, September 28, 2021 6:44 PM To: tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> Cc: Kostiantyn.Tkachov(a)infineon.com<mailto:Kostiantyn.Tkachov@infineon.com>; Roman.Mazurak(a)infineon.com<mailto:Roman.Mazurak@infineon.com>; Hennadiy.Kytsun(a)infineon.com<mailto:Hennadiy.Kytsun@infineon.com> Subject: [TF-M] Enablement of external bl2 builds Hi everyone, When adding support for new platform we ran into an issue with BL2 variable. In our architecture we have Bootloader based on MCUboot (aka BL2) but we are not planning to build it with TF-M. Bootloader would be separate repo and be built separately. So we need the way to build TF-M with FWU service and shared data definitions when BL2=OFF. I was trying to add support for this but was not able to do this because build structure is quite complicated. Does anyone have ideas or suggestions about the way we can implement this feature? Best regards, Bohdan Hunko Cypress Semiconductor Ukraine Engineer CSUKR CSS ICW SW FW Mobile: +38099 50 19 714 Bohdan.Hunko(a)infineon.com<mailto:Bohdan.Hunko@infineon.com>

4 years, 2 months

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Deprecation of ARM/MPS2/fvp_sse300 platform

by Anton Komlev

Hi Everyone, I would like to propose the deprecation of arm/mps2/fvp_sse300 platform because the main platform for Corstone-300 is MPS3, available in arm/mps3/an547 and we would like to reduce the number of the platforms to maintain. Following the deprecation process, https://tf-m-user-guide.trustedfirmware.org/platform/ext/platform_deprecati… this proposal is open for discussion at least for 4 weeks before the platform will be marked as deprecated and removed from TF-M unless any objection received. Thanks and Best regards, Anton Komlev

4 years, 2 months

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Announcement: documentation build is separated from the main.

by Anton Komlev

Hello, >From now on, documentation has no interference with the main build and runs as an independent CMake project. This reduces CMake configuration phase and not requires doc tools for the normal development anymore. There are no changes for building the binaries, but documentation build shall start in the docs folder cmake -S docs -B build_docs cmake --build build_docs More details are here: https://tf-m-user-guide.trustedfirmware.org/docs/technical_references/instr… Thanks, Anton

4 years, 2 months

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Sending events from TF-M to non-secure world?

by Li, Jun R

Hi, Anyone has idea how a service inside a secure partition can send out some events to the non-secure world? Does callback still work over IPC? It seems non-secure world can connect to a SP but not easy to do the other way. Appreciate any comments or suggestions! Jun Intel Corporation @ SC, CA

4 years, 2 months

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PSA Arch attestation test failure

by Chris.Brand＠infineon.com

Hi, We're seeing a failure in the PSA Arch attestation test, specifically: TEST: 601 | DESCRIPTION: Testing attestation initial attestation APIs | UT: psa_initial_attestation [Info] Executing tests from non-secure [Check 1] Test psa_initial_attestation_get_token with Challenge 32 [Check 2] Test psa_initial_attestation_get_token with Challenge 48 Failed at Checkpoint: 1 Actual: -138 Expected: 0 TEST RESULT: FAILED (Error Code=0x1) The failure is seen on PSoC, but only the gcc Release build (armclang and the other three gcc builds are all fine. Haven't tested IAR), which makes it tricky to debug. PSoC uses the common attest HAL code, though, so I imagine the issue may also be present on other platforms. Bisecting the problem leads to commit 09d71ffd40368b978d428744ad7ba0d3963f8d1d ("Platform: Use OTP as backing for attestation data"). -138 is PSA_ERROR_BUFFER_TOO_SMALL. I'm running gcc-arm-none-eabi-7-2018-q2-update, in case that matters. Chris Brand Cypress Semiconductor (Canada), Inc. Sr Prin Software Engr CSCA CSS ICW SW PSW 1 Office: +1 778 234 0515 Chris.Brand(a)infineon.com<mailto:Chris.Brand@infineon.com>

4 years, 2 months

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Automatic code formatting

by Bøe, Sebastian

Hi, does anyone have a .clang-format file, or another technology for automatic code formatting to the TF-M coding standard?

4 years, 2 months

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Platform specific test out-of-tree build

by Jianliang Shen

Hi all, Thanks for Chris Brand's enhancement suggestion about platform-specific tests. I'm enabling out-of-tree build mode of platform specific test suites with tf-m-tests. Currently I have proposed the following changes: * [TF-M patch<https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/11296>] * [tf-m-tests patch<https://review.trustedfirmware.org/c/TF-M/tf-m-tests/+/11297>] My proposal supplies a flexible interface for partners to out-of-tree build local tests. With this new feature, * Partners can perform local test quickly during development to improve test efficiency * Partners can maintain local test code outside tf-m-tests repo in case of confidential information or IP issues. I also put an out-of-tree example test source code into tf-m-extras repo and a document in TF-M repo: * [tf-m-extras patch<https://review.trustedfirmware.org/c/TF-M/tf-m-extras/+/11323>] * [TF-M patch doc<https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/11336>] This example indicates that platform-specific tests can be integrated with tf-m-tests, without following tf-m-tests structure or definitions. The document introduces the usage and coding guide of this new feature. PS: If partners would like to upstream platform specific test code, we will be glad to create a specific folder under tf-m-tests repo as Chris Brand suggested. I'd be grateful if you can take a look at the patch sets above. Any suggestion or comment is welcome. Best Regards Jianliang Shen

4 years, 2 months

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Re: [TF-M] Adding platform specific functions to Crypto Service.

by Roman.Mazurak＠infineon.com

Hi Fabian, Yes, our team is thinking about adding feature to the Crypto service API, which are not cryptographic in nature. This is one of the possible solution in our design to avoid additional data processing layer between cryptographic clients and crypto accelerator. Our crypto accelerator also provides additional features which will be used by other secure partitions in TF-M but it doesn’t support handling of crypto and non-crypto requests at the same time. It’s not a problem for CC312 which is used for crypto services and OTP in the latest commit. As far as I understand CC312 allows to use crypto operations and OTP related functions at the same time without additional synchronization. So, the reference design is not very helpful in our situation. So, implementation of additional service is not the best solution. It will extend processing time for each cryptographic requests. The other option is to implement synchronization by using mutex. I think mutex is preferable approach, but this feature is also not support by TF-M yet 😊 There is the discussion which I started for mutex : https://lists.trustedfirmware.org/pipermail/tf-m/2021-October/001914.html Thanks, Roman. From: Fabian Schmidt <fabian.schmidt(a)nxp.com> Sent: Tuesday, October 12, 2021 13:47 To: Shebu.VargheseKuriakose(a)arm.com; David.Hu(a)arm.com; Mazurak Roman (CSUKR CSS ICW SW FW) <Roman.Mazurak(a)infineon.com>; mbed-tls(a)lists.trustedfirmware.org Cc: nd(a)arm.com Subject: RE: [TF-M] Adding platform specific functions to Crypto Service. Hi Roman, My understanding is that you would like to add features to the Crypto service API, but the features which you would like to add are not cryptographic in nature. Have you considered creating your own service for those features, instead of modifying the Crypto service? Or is there anything makes this not a viable option? If you are thinking about adding hardware acceleration for some Crypto features, that’s indeed covered in Shebu’s link. Greetings, Fabian Schmidt From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Shebu Varghese Kuriakose via TF-M Sent: Dienstag, 12. Oktober 2021 11:46 To: David Hu <David.Hu(a)arm.com<mailto:David.Hu@arm.com>>; Roman.Mazurak(a)infineon.com<mailto:Roman.Mazurak@infineon.com>; tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>; mbed-tls(a)lists.trustedfirmware.org<mailto:mbed-tls@lists.trustedfirmware.org> Cc: nd <nd(a)arm.com<mailto:nd@arm.com>> Subject: [EXT] Re: [TF-M] Adding platform specific functions to Crypto Service. Caution: EXT Email Hi Roman, I also might not have understood the question completely. As you mention crypto HAL API, here is the specification which defines a standardized mechanism for PSA Crypto implementations to interface with Secure elements and crypto accelerators - https://github.com/ARMmbed/mbedtls/blob/development/docs/proposed/psa-drive…<https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.co…> Also adding mbed-tls mailing list as the thread is crypto related.. Regards, Shebu From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of David Hu via TF-M Sent: Tuesday, October 12, 2021 4:18 AM To: Roman.Mazurak(a)infineon.com<mailto:Roman.Mazurak@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: [TF-M] Adding platform specific functions to Crypto Service. Hi Roman, Are you asking about adding platform specific HAL API to implement PSA Crypto API function? Please correct me if I misunderstand your question. Best regards, Hu Ziji From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Roman Mazurak via TF-M Sent: Monday, October 11, 2021 9:45 PM To: tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> Subject: [TF-M] Adding platform specific functions to Crypto Service. Hi all, We would like to add a number of platform specific functions to Crypto Service API. Is it ok if such functions will not be related to cryptographic service, but such approach allows us to optimize platform design? Is there any initiative to create a Crypto Service HAL API to extend Crypto with custom functions? Best regards, Roman.

4 years, 2 months

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TF-M Cadence change proposal

by Anton Komlev

Hello, Following the Tech Forum today I am duplicating the proposal of TF-M cadence change from 4 to 6 months here. This will generate 2 releases a year, planed for the end or March and the end of October starting from v1.6.0. The upcoming release v1.5.0 will stay on planned date. Please share your comments and concerns on the topic. Thanks, Anton

4 years, 2 months

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