- TF-M - lists.trustedfirmware.org

by Kevin Townsend

Hi, As part of some of our work on TF-M, specifically around attestation, device provisioning and firmware management, we've been reviewing some of what various companies are currently doing or requiring during the provisioning process (whether provisioning at the manufacturing phase, or provisioning devices into cloud or similar services post manufacturing). The common thread in almost all of these scenarios is the use of X.509 certification chains when working with the public key(s) held on the end device. At Linaro, we've been thinking through some of the benefits and tradeoffs of migrating from the current approach of exposing unsigned public keys for things like initial attestation and signing firmware, and what would be required to allow the signing of the attestation/firmware keys on devices, and generating new keys such as provisioning a device onto an Amazon/Google/Microsoft cloud service which would require creating a new private key held in secure storage, and storing the signed certificate chain associated with that new private key for on-demand retrieval. - Some of the initial thinking and imagined benefits of migrating to X.509 certificate chains are described here: https://github.com/microbuilder/certificate_chains/blob/master/rfc_tfm.md - Some general notes on X.509 certificates are available here: https://github.com/microbuilder/certificate_chains/blob/master/README.md - And here are two scripts showing how to create 2 and 3 level certificate chains, just as a proof of concept to better understand how this might work with something like TF-M: - https://github.com/microbuilder/certificate_chains/blob/master/2lev_cert_cr… - https://github.com/microbuilder/certificate_chains/blob/master/3lev_cert_cr… Specifically, they key missing aspects to enable the use of standard X.509 certificates are: - Update mcuboot to understand a certificate chain -- rather than the raw public key -- when verifying firmware images - Generating PKSC#10 (RFC2986) certificate signing requests on the secure side, using a securely held private key during the request generation process - Generate new private keys and store them in secure storage for non-attestation uses like cloud services, and retrieve the associated and signed cert chains for that key on demand A proposal of how this might work in the real world is shown here, with the TF-M secure code requrements in the 'opt' box of the sequence diagram: https://github.com/microbuilder/certificate_chains/blob/master/rfc_tfm.md#c… We don't have a full TF-M proof of concept ready yet, but wanted to put the idea on the table of migrating to X.509 certificate chains while we work on a proof of concept, and continue analysis of how provision at manufacturing and in the field (to cloud services, etc.) can be improved. Any feedback/concerns is welcome here or perhaps in the Github repo above until a specific change request can be prepared for TF-M. Best regards, Kevin Townsend

6 years, 3 months

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Re: [TF-M] [EXTERNAL] Re: out of tree build

by DeMars, Alan

In our use case, we added complete paths to the build area's corresponding directory to the embedded include paths and removed the default generated content from our git repo. Consequently only the newly generated content is found, wherever it happens to be placed. Alan -----Original Message----- From: TF-M [mailto:tf-m-bounces@lists.trustedfirmware.org] On Behalf Of Kevin Peng (Arm Technology China) via TF-M Sent: Friday, November 22, 2019 2:15 AM To: tf-m(a)lists.trustedfirmware.org Cc: nd Subject: Re: [TF-M] [EXTERNAL] Re: out of tree build Hi all, I'm having issues on supporting the out of tree build. So I'd like to propose some additional changes. What does the out of tree build currently support is that: The user uses the tfm_parse_manifest_list.py with the custom manifests to generate the customized files to a directory out of TF-M. And the TF-M build system uses the customized files rather than the pre-generated ones in the TF-M for building. The problem is that some of the source files include the generated headers using the relative path to where the source itself is. And the directory of the source file is always searched first. This makes it impossible to use the generated files outside TF-M even the custom output directory is added to searching list. So I suggest to put the generated files to a dedicated directory in TF-M. Then for the default build, add the directory and its subdirectories to the search list for headers. For out of tree build, use the specified directory and its subdirectories instead. Then there would only one header file with the same name in all the directories for searching headers. Any concerns, thoughts or suggestions? Best Regards, Kevin -----Original Message----- From: Kevin Peng (Arm Technology China) Sent: Friday, November 22, 2019 3:45 PM To: DeMars, Alan <ademars(a)ti.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: RE: [EXTERNAL] Re: [TF-M] out of tree build Hi Alan, I've created a patch for the tfm_parse_manifest_list.py as the first step for the out of tree build support: https://review.trustedfirmware.org/c/trusted-firmware-m/+/2606 The changes for build system is ongoing. The functionality changes for the tfm_parse_manifest_list.py is the same as your version. Please have a review and help verify it if possible. Comments from anyone else are also welcome. Best Regards, Kevin -----Original Message----- From: Kevin Peng (Arm Technology China) Sent: Thursday, November 14, 2019 3:31 PM To: DeMars, Alan <ademars(a)ti.com> Cc: tf-m(a)lists.trustedfirmware.org; nd <nd(a)arm.com> Subject: RE: [EXTERNAL] Re: [TF-M] out of tree build OK. It's much clearer for me now. Thanks. Best Regards, Kevin -----Original Message----- From: DeMars, Alan <ademars(a)ti.com> Sent: Thursday, November 14, 2019 10:34 AM To: Kevin Peng (Arm Technology China) <Kevin.Peng(a)arm.com> Cc: tf-m(a)lists.trustedfirmware.org; nd <nd(a)arm.com> Subject: Re: [EXTERNAL] Re: [TF-M] out of tree build 1) I verified the tfm_parse_manifest.py script changes using the master branch’s version of the tfm_manifest_list.yaml and tfm_generated_file_list.yaml files. 2) Yes, I’m building using the unmodified master branch’s cmake build system. 3) Just as all other build artifacts are placed in the user’s build directory and NOT in the source tree, the generated files should also. Otherwise, the user is required to update the source tree’s tfm_manifest_list.yaml and tfm_generated_file_list.yaml files to build a custom SPE, with the generated files also ending up in the source tree. The files necessary to create a custom SPE should not be kept in the source tree. Nor should the generated content be inserted in the source tree. This creates headaches for maintaining the original source tree. Alan > On Nov 13, 2019, at 1:57 AM, Kevin Peng (Arm Technology China) via TF-M <tf-m(a)lists.trustedfirmware.org> wrote: > > Hi Alan, > > I checked your modified tfm_parse_manifest_list.py. > It basically uses the input tfm_manifest_list.yaml and tfm_generated_file_list.yaml to generate the TF-M auto generated files to the third input. > > I'm sorry I was not in the workshop. So I have some questions. > 1. Do you have your own tfm_manifest_list.yaml and tfm_generated_file_list.yaml that is not upstreamed in TF-M? > 2. Are you using the TF-M provided CMake build system? > 3. Do you only need the files generated by tfm_parse_manifest_list.py to be out of the TF-M source directory? > > Could you provide some details about your requirements. Thanks. > > Best Regards, > Kevin > > -----Original Message----- > From: Kevin Peng (Arm Technology China) > Sent: Wednesday, November 13, 2019 10:27 AM > To: tf-m(a)lists.trustedfirmware.org > Cc: nd <nd(a)arm.com> > Subject: RE: out of tree build > > Hi Alan, > > I'm following on this and will get you updated on any progress. > > Best Regards, > Kevin > > -----Original Message----- > From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of DeMars, Alan via TF-M > Sent: Thursday, November 7, 2019 12:42 PM > To: Abhishek Pandit <Abhishek.Pandit(a)arm.com> > Cc: 'tf-m(a)lists.trustedfirmware.org' <tf-m(a)lists.trustedfirmware.org> > Subject: Re: [TF-M] out of tree build > > Trying again after renaming tfm_parse_manifest_list.py to tfm_parse_manifest_list.txt so it wouldn't get deleted. > --- > > With the attached modified secure_fw/CMakeLists.txt and tools/tfm_parse_manifest_list.py files, I am able to redirect the generated files using the following command line: > > python3 <full_path_to_your>/tfm_parse_manifest_list.py <full_path_to_your>/tfm_manifest_list.yaml <full_path_to_your>/tfm_generated_file_list.yaml <full_path_to_your>/<build_dir> > > And then build the ConfigCoreIPC artifacts within <your_build_dir> using the following cmake line: > > cmake -G"Unix Makefiles" -DPROJ_CONFIG=`readlink -f ../configs/ConfigCoreIPC.cmake` -DREMOTE_GEN_DIR=<full_path_to_your><build_dir> -DTARGET_PLATFORM=AN521 -DCOMPILER=GNUARM ../ > > The changes to tfm_parse_manifest_list.py are backward compatible with the standard usage. > > Alan > > > -----Original Message----- > From: TF-M [mailto:tf-m-bounces@lists.trustedfirmware.org] On Behalf Of DeMars, Alan via TF-M > Sent: Monday, November 4, 2019 4:36 PM > To: Abhishek Pandit; tf-m(a)lists.trustedfirmware.org > Subject: [EXTERNAL] Re: [TF-M] out of tree build > > Abishek, > > Yes, we have modified tfm_gen.py and tfm_parse_manifest_list.py to support redirecting the destination of the generated template files into a command line provided destination build directory. > A corresponding change to our platform's platform/ext/xyz.cmake file was also required to add the path to the root of the build directory to the embedded_include_directories() list as well as the paths to the generated linker command files. > > I was not planning to provide these changes as a patch for review as I am very unsure of the applicability of this to other platforms. Also, I was fairly certain that given my very poor understanding of the CMake build system, my approach to the problem was not utilizing features present in CMake that would make the job simpler and more extensible. > > Since the topic came up at the conference and you already seemed willing to address the out-of-tree build problem that the templates lead to, I assumed you folks would find a simple and elegant solution that would save me the embarrassment of exposing my lack of CMake expertise. > > Alan > > -----Original Message----- > From: Abhishek Pandit [mailto:Abhishek.Pandit@arm.com] > Sent: Monday, November 4, 2019 3:08 PM > To: DeMars, Alan; tf-m(a)lists.trustedfirmware.org > Subject: [EXTERNAL] RE: out of tree build > > Hi Alan, > Not sure if I remember the exact detail from the workshop last week, but did you mention that you have a prototype for this? If so, are you planning to push a patch for review? > Thanks, > Abhishek > > -----Original Message----- > From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of DeMars, Alan via TF-M > Sent: 01 November 2019 16:29 > To: 'tf-m(a)lists.trustedfirmware.org' <tf-m(a)lists.trustedfirmware.org> > Subject: [TF-M] out of tree build > > Please modify the template generators to support out of tree build, and modify the CMake files to add the necessary include paths so that the files that include the template-generated files can find them. > > Alan > -- > TF-M mailing list > TF-M(a)lists.trustedfirmware.org > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. > -- > TF-M mailing list > TF-M(a)lists.trustedfirmware.org > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > -- > TF-M mailing list > TF-M(a)lists.trustedfirmware.org > https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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TF-M Technical Forum call - 5th December

by Bill Fletcher

Hi all, As mentioned in the TF-M workshop in Lyon last month, we propose to kick off the TF-M Technical Forum meeting, starting on the 5th December. This is an open forum for anyone to participate and it is not restricted to TF members. It will operate under the guidance of the TF TSC. - Due to expected attendees from Asia, Europe and the Americas, the timeslot is challenging. We hope it's not too difficult for anyone - we can review after the first couple of meetings. - Initially we propose a bi-weekly call and then we'll change cadence depending on interest For more details of the call click on the Google Calendar image at https://www.trustedfirmware.org/meetings/tf-m-technical-forum/ Best regards -- [image: Linaro] <http://www.linaro.org/> *Bill Fletcher* | *Field Engineering* T: +44 7833 498336 <+44+7833+498336> bill.fletcher(a)linaro.org | Skype: billfletcher2020

6 years, 3 months

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TF-M RC3 release

by Tamas Ban

Hi, A new tag TF-Mv1.0-RC3 was created last Friday. The main change since RC2 is that it provides support for integrated Cryptocell-312 cryptographic hardware accelerator on MuscaB1e platform. This enables TF-M to make use of Cryptocell-312 (CC-312) for crypto acceleration during Secure boot and runtime. TF-M is also can use the provisioned HUK (Hardware Unique Key), Attestation key and RoTPK (Root of Trust Public Key) in Cryptocell's OTP memory. Tamas

6 years, 3 months

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Re: [TF-M] Regression test issues with IAR port

by Minos Galanakis

Thomas, Tests are placed under the test -> suites -> service name directory. In your case you are looking at the Secure Storage Service non secure suite. For SST The logic is located at : * Non Secure side tests: test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c * Secure side tests: test/suites/sst/secure/psa_ps_s_interface_testsuite.c Hope that helps Minos ________________________________ From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> on behalf of Thomas Törnblom via TF-M <tf-m(a)lists.trustedfirmware.org> Sent: 28 November 2019 14:49 To: tf-m(a)lists.trustedfirmware.org <tf-m(a)lists.trustedfirmware.org> Subject: [TF-M] Regression test issues with IAR port In my quest to port TF-M to the IAR toolchain I've run into issues with a few of the tests, and I need some hints where to look. The cmake build command line: --- cmake .. -G"Unix Makefiles" -DPROJ_CONFIG=C:\Users\thomasto\Projects\tf-m16\trusted-firmware-m\configs\ConfigRegression.cmake -DTARGET_PLATFORM=MUSCA_A -DCOMPILER=IARARM -DCMAKE_BUILD_TYPE=RelWithDebInfo --- This results in three similar tests that fails: --- > Executing 'TFM_SST_TEST_1018' Description: 'Get interface with invalid thread name' Get should not succeed with invalid thread name (Failed at C:/Users/thomasto/Projects/tf-m16/trusted-firmware-m/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c:936) TEST FAILED! > Executing 'TFM_SST_TEST_1019' Description: 'Get info interface with invalid thread name' Get info should not succeed with invalid thread name (Failed at C:/Users/thomasto/Projects/tf-m16/trusted-firmware-m/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c:1015) TEST FAILED! > Executing 'TFM_SST_TEST_1020' Description: 'Remove interface with invalid thread name' Remove should not succeed with invalid thread name (Failed at C:/Users/thomasto/Projects/tf-m16/trusted-firmware-m/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c:1093) TEST FAILED! --- Where do I find the logic that determines if these tests succeed or fails? Cheers, Thomas -- *Thomas Törnblom*, /Product Engineer/ IAR Systems AB Box 23051, Strandbodgatan 1 SE-750 23 Uppsala, SWEDEN Mobile: +46 76 180 17 80 Fax: +46 18 16 78 01 E-mail: thomas.tornblom(a)iar.com <mailto:thomas.tornblom@iar.com> Website: www.iar.com<http://www.iar.com> <http://www.iar.com> Twitter: www.twitter.com/iarsystems<http://www.twitter.com/iarsystems> <http://www.twitter.com/iarsystems> -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Regression test issues with IAR port

by Thomas Törnblom

In my quest to port TF-M to the IAR toolchain I've run into issues with a few of the tests, and I need some hints where to look. The cmake build command line: --- cmake .. -G"Unix Makefiles" -DPROJ_CONFIG=C:\Users\thomasto\Projects\tf-m16\trusted-firmware-m\configs\ConfigRegression.cmake -DTARGET_PLATFORM=MUSCA_A -DCOMPILER=IARARM -DCMAKE_BUILD_TYPE=RelWithDebInfo --- This results in three similar tests that fails: --- > Executing 'TFM_SST_TEST_1018' Description: 'Get interface with invalid thread name' Get should not succeed with invalid thread name (Failed at C:/Users/thomasto/Projects/tf-m16/trusted-firmware-m/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c:936) TEST FAILED! > Executing 'TFM_SST_TEST_1019' Description: 'Get info interface with invalid thread name' Get info should not succeed with invalid thread name (Failed at C:/Users/thomasto/Projects/tf-m16/trusted-firmware-m/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c:1015) TEST FAILED! > Executing 'TFM_SST_TEST_1020' Description: 'Remove interface with invalid thread name' Remove should not succeed with invalid thread name (Failed at C:/Users/thomasto/Projects/tf-m16/trusted-firmware-m/test/suites/sst/non_secure/psa_ps_ns_interface_testsuite.c:1093) TEST FAILED! --- Where do I find the logic that determines if these tests succeed or fails? Cheers, Thomas -- *Thomas Törnblom*, /Product Engineer/ IAR Systems AB Box 23051, Strandbodgatan 1 SE-750 23 Uppsala, SWEDEN Mobile: +46 76 180 17 80 Fax: +46 18 16 78 01 E-mail: thomas.tornblom(a)iar.com <mailto:thomas.tornblom@iar.com> Website: www.iar.com <http://www.iar.com> Twitter: www.twitter.com/iarsystems <http://www.twitter.com/iarsystems>

6 years, 3 months

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Re: [TF-M] PSA Certification without PS?

by Shebu Varghese Kuriakose

Hi Andrej/Kevin, Pasting the ;Secure Storage' Security Function Requirement below from the PSA Certified Level2 Protection Profile* It doesn’t specifically mention Protected Storage and Internal Trusted Storage Service as a requirement. As long as the Target of Evaluation can prove that the confidentiality and integrity of assets in Secure Storage can be maintained, the requirement can be met. PSA defines Protected Storage (PS)** and Internal Trusted Storage (ITS)**. PS is meant to store larger data sets stored on external flash and ITS for device intimate data stored on chip flash storage. If the device doesn’t have an on chip flash storage, maybe it is still possible to just use PS implementation using external flash to ensure confidentiality and integrity of the secret assets on the platform. @Marcus Streets<mailto:Marcus.Streets@arm.com> – Could you please share your thought on this >>> 5.3 F.SECURE_STORAGE The TOE protects the confidentiality and integrity of assets in a secure storage. The secure storage is bound to the platform. Only the TOE can retrieve and modify assets from this secure storage. This security function mitigates T.STORAGE by preventing direct and unprotected access to assets. >>> Regards, Shebu * https://www.psacertified.org/app/uploads/2019/02/JSADEN002-PSA_Certified_Le… ** https://developer.arm.com/-/media/Files/pdf/PlatformSecurityArchitecture/Im… -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Andrej Butok via TF-M Sent: Thursday, November 28, 2019 7:50 AM To: Kevin Peng (Arm Technology China) <Kevin.Peng(a)arm.com> Cc: tf-m(a)lists.trustedfirmware.org Subject: Re: [TF-M] PSA Certification without PS? Hi Kevin, So, platforms without internal flash memory, required by Internal Trusted Storage, may apply only for PSA L1. Right? Thank you for your clarification, Andrej Butok -----Original Message----- From: Kevin Peng (Arm Technology China) <Kevin.Peng(a)arm.com<mailto:Kevin.Peng@arm.com>> Sent: Thursday, November 28, 2019 5:14 AM To: Andrej Butok <andrey.butok(a)nxp.com<mailto:andrey.butok@nxp.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] PSA Certification without PS? A quick information: Internal Trusted Storage is mandatory by PSA for isolation level 2 and 3. Best Regards, Kevin -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Andrej Butok via TF-M Sent: Wednesday, November 27, 2019 7:32 PM To: tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> Subject: [TF-M] PSA Certification without PS? Hello, Most probably, we will port TFM to a platform with TZ and external flash, BUT without internal flash. Is it possible to certify it for PSA L1 & L2 & Dev API, without Internal Trusted Storage service and its API? Do you see any issue? Thanks Andrej Butok -- TF-M mailing list TF-M(a)lists.trustedfirmware.org<mailto:TF-M@lists.trustedfirmware.org> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.tru… -- TF-M mailing list TF-M(a)lists.trustedfirmware.org<mailto:TF-M@lists.trustedfirmware.org> https://lists.trustedfirmware.org/mailman/listinfo/tf-m IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

6 years, 3 months

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Re: [TF-M] PSA Certification without PS?

by Kevin Peng (Arm Technology China)

A quick information: Internal Trusted Storage is mandatory by PSA for isolation level 2 and 3. Best Regards, Kevin -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Andrej Butok via TF-M Sent: Wednesday, November 27, 2019 7:32 PM To: tf-m(a)lists.trustedfirmware.org Subject: [TF-M] PSA Certification without PS? Hello, Most probably, we will port TFM to a platform with TZ and external flash, BUT without internal flash. Is it possible to certify it for PSA L1 & L2 & Dev API, without Internal Trusted Storage service and its API? Do you see any issue? Thanks Andrej Butok -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Re: [TF-M] The svcall switch-case vs function table

by Anton Komlev

Hi Ken, all, Right, let's see the binary size of a prototype. Regarding TBB instruction, It's applied at the stage of binary generation, after source parsing and references resolution so it is irrelevant to the problem of dead references, I have mentioned. The best, Anton -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Ken Liu (Arm Technology China) via TF-M Sent: 22 November 2019 10:23 To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] The svcall switch-case vs function table Hi Anton, Thanks for the reminder. About code size, two points: - We saved code size for switch/case usage: switch(num) {case1:case2:} -> func_tbl[num].func(); - The compiler uses 'TBB' instruction, which is a function table already. So I think it should be okay; we can verify the code size after the prototype is available. BR /Ken -----Original Message----- From: Anton Komlev <Anton.Komlev(a)arm.com> Sent: Thursday, November 21, 2019 8:09 PM To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com>; Ken Liu (Arm Technology China) <Ken.Liu(a)arm.com> Subject: RE: The svcall switch-case vs function table Hi Ken, All, Just a reminder of a side-effect of array-based function table. It creates unconditional reference to a function and blocks that function from removal during code size optimization. TF-M is quite sensitive to binary image size and we should be very careful to avoid its increase. This is a general comment on functions table, irrelevant to the patch, where I have no knowledge yet to comment. The best, Anton -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Ken Liu (Arm Technology China) via TF-M Sent: 14 November 2019 09:33 To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: [TF-M] The svcall switch-case vs function table Hi, I am trying to look at into the svcall logics and found if we keep using the switch/case would make it hard to abstract this logic for different configurations. Thinking to move this static defined svc codes into an array-based function table. The pros are, the svc code set for different configurations is configurable, we don't need any #ifdef inside the svc numbers but rely on the configuration provided svc headers, and these headers are used inside configuration logic. And the overall svcall logic does not need to know the exact number definition but just do a f[num].func() call. The cons... I think the only thing is table may be out of date and cause a potential problem? or some function has only <4 parameter but we have to define a f(a0,a1,a2,a3) type function and fill extra parameter as zeros? This won't improve the execution efficiency if the svc numbers are continuous since compiler uses 'TBB' to create a mapping table while processing switch/case, so we can skip this point while talking pros. Welcome to comment or propose patches for this. Thanks. /Ken -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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PSA Certification without PS?

by Andrej Butok

Hello, Most probably, we will port TFM to a platform with TZ and external flash, BUT without internal flash. Is it possible to certify it for PSA L1 & L2 & Dev API, without Internal Trusted Storage service and its API? Do you see any issue? Thanks Andrej Butok

6 years, 3 months

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Re: [TF-M] Coding guideline

by Anton Komlev

Hello, I do also support the move to loose the requirement of 80 columns. The real need is outdated and supported as a legacy style, making more trouble than help. The best, Anton -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Laurence Lundblade via TF-M Sent: 26 November 2019 21:12 To: Tamas Ban <Tamas.Ban(a)arm.com> Cc: nd <nd(a)arm.com>; tf-m(a)lists.trustedfirmware.org Subject: Re: [TF-M] Coding guideline For line length I’m following these rules for t_cose <https://github.com/laurencelundblade/t_cose> - All comments blocks are 80 columns or less - 2% of code lines can be over 80 columns (1% is too few) - No lines over 120 columns I am much happier and think the code is much better by allowing 2% of code lines over 80 columns. I don’t have to make variable names short and obscure, break up if statements in unnatural places, break up for(;;) statements unnaturally and such. LL > On Nov 18, 2019, at 8:31 AM, Tamas Ban <Tamas.Ban(a)arm.com> wrote: > > Hi, > > I would like to open a conversation about TF-M coding guideline <https://git.trustedfirmware.org/trusted-firmware-m.git/tree/docs/coding_gui…>. I have these proposals: > Change the rule of the 80 character column width: > Max 80 characters length. > Column length is max 80 character in first place, but there are exceptions when length could be MAX 120 character: > Degrades code understandability: short, obscured variable names; > awkward line breaks Maximum 1% of the lines can exceed 80 charter length. > Might remove this rule, because in many cases we are not complaint with it. For example PSA Crypto API: > o Order function parameters so that input params are before output params. > o https://git.trustedfirmware.org/trusted-firmware-m.git/tree/interface/inclu… <https://git.trustedfirmware.org/trusted-firmware-m.git/tree/interface/inclu…> > > I’m interested in your opinions! Other rules also can be revisited! > > Tamas -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Re: [TF-M] Using git submodules for dependencies?

by Gyorgy Szing

Hi, Build environment provisioning (and dependency management) is a larger topic and sub-modules can only solve a small part of it. There is definitely room for improvement in this area, but as far as I can see sub-modules are a sub optimal answer. Some of the issues which came to my mind: 1. The user experience of sub-modules is sometimes quirky. For example it is a headache if you have to switch between branches where one of the branches does not have a specific sub-module. 2. With sub-modules you can not have complex dependencies. I.e.: when one platform needs a dependency and another not, or you need two version of a dependency, or a different version for two platforms. 3. It is easy to see on what the repo having the sub-module depends, but the other direction is not. It is hard to see what is using a module. 4. The validness of tests are limited if you use source code. Longer term it would be nice to allow using tested binaries of tf-m dependencies and sub-modules can not handle this need. 5. Flexibility. If we use sub-modules, then the version control and the dependency handling "layers" get bounded. For tf-m developers this might not be an issue but for integrators it can be. Can you please explain the problem you see a bit more? Zephyr is using cmake and you could use the External_project or the FetchContent module to get all needed dependencies. Also nothing really stops you to use sub-modules in the Zephyr repo to get tf-m and all it's dependencies. /George -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Kevin Townsend via TF-M Sent: 26 November 2019 19:23 To: Kumar Gala <kumar.gala(a)linaro.org> Cc: nd <nd(a)arm.com>; tf-m(a)lists.trustedfirmware.org Subject: Re: [TF-M] Using git submodules for dependencies? Hi, I'm reviving an old thread (sorry, probably bad form), but we're running into this issue again now with Zephyr (and probably with FreeRTOS later) where we need to produce a TF-M 'module' got Zephyr that we can include in the zephyr github repo. With the current approach for TF-M, we will have to produce 5 forks of the 5 projects/dependencies, which seems superfluous versus a single 'master' TF-M repo with the four dependencies as sub-modules, and I can't see why technically this would be more of a challenge for end-users (you can even init the submodules at the same time you clone the parent TF-M repo so it's actually LESS work), and means a single repo where all of the dependency versions can change over time in sync with the various releases. I may be missing or misunderstanding an obvious technical drawback made earlier, but I haven't understand why submodules are less desirable than 1+4 independent repos both for TF-M and any projects on the RTOS side depending on it? Kevin On Wed, 10 Jul 2019 at 18:09, Kumar Gala via TF-M < tf-m(a)lists.trustedfirmware.org> wrote: > How would a git repo with some submodules preclude any of the things > you mentioned? I guess my initial thought is that there would be an “uber” > repo in which TFM, CMSIS and mbedcrypto would all be sub-modules. > > There’s also the option of using cmake ExternalProject ( > https://cmake.org/cmake/help/latest/module/ExternalProject.html?highli > ght=external > ) > > Or west > > https://pypi.org/project/west/ > > - k > > > On Jul 10, 2019, at 8:47 AM, Ashutosh Singh via TF-M < > tf-m(a)lists.trustedfirmware.org> wrote: > > > > Hi, > > > > Initial idea was to keep the external dependencies clearly visible > > (from > code auditability point of view). With submodule we can't checkout the > dependencies out of tree. Since the dependencies need to be checked > out only once it was considered acceptable nuisance, until you do a > pull and version of the dependencies have changed. > > 'repo' was considered as well, but repo tool doesn't work on > windows(last I checked). > > > > Thanks, > > Ashu > > > > -----Original Message----- > > From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of > > Kumar > Gala via TF-M > > Sent: 10 July 2019 09:50 > > To: Andrej Butok <andrey.butok(a)nxp.com> > > Cc: tf-m(a)lists.trustedfirmware.org > > Subject: Re: [TF-M] Using git submodules for dependencies? > > > > There can always be a fork of the sources kept in TF-M repos to > > handle > the case of needing local modifications for some reason. > > > > - k > > > >> On Jul 10, 2019, at 3:48 AM, Andrej Butok via TF-M < > tf-m(a)lists.trustedfirmware.org> wrote: > >> > >> Hi Kevin, > >> > >> Only if 100% of the external project source code is used without > change. > >> Even if it is valid now, nobody will give you this guarantee in future. > >> > >> Regards, > >> Andrej > >> > >> -----Original Message----- > >> From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of > >> Kevin > Townsend via TF-M > >> Sent: Wednesday, July 10, 2019 10:41 AM > >> To: Thomas Törnblom via TF-M <tf-m(a)lists.trustedfirmware.org> > >> Subject: [TF-M] Using git submodules for dependencies? > >> > >> Hi, > >> > >> I'm currently working on integrating TF-M into Zephyr and getting > >> TF-M > working with QEMU. Part of that work is simplifying the setup and > build process to generate a TF-M secure library. > >> > >> Was the idea of git submodules for dependencies considered and rejected? > >> Using sub-modules would reduce the number of setup steps required, > >> and > pair external dependency versions with specific TF-M commits/releases. > >> > >> There may be a valid reason this approach was rejected, but it > >> seems > like a sensible option on the surface? > >> > >> Best regards, > >> Kevin Townsend > >> -- > >> TF-M mailing list > >> TF-M(a)lists.trustedfirmware.org > >> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flist > s.trustedfirmware.org%2Fmailman%2Flistinfo%2Ftf-m&data=02%7C01%7Ca > ndrey.butok%40nxp.com%7C04856a3b68604d01153208d705124e6a%7C686ea1d3bc2 > b4c6fa92cd99c5c301635%7C0%7C0%7C636983448498201722&sdata=IjOFM44xG > bA2Zgrj%2F2VSmHEYLuXvMzqS7HH6h7gekF4%3D&reserved=0 > >> -- > >> TF-M mailing list > >> TF-M(a)lists.trustedfirmware.org > >> https://lists.trustedfirmware.org/mailman/listinfo/tf-m > > > > -- > > TF-M mailing list > > TF-M(a)lists.trustedfirmware.org > > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > > -- > > TF-M mailing list > > TF-M(a)lists.trustedfirmware.org > > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > > -- > TF-M mailing list > TF-M(a)lists.trustedfirmware.org > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Coding guideline

by Tamas Ban

Hi, I would like to open a conversation about TF-M coding guideline<https://git.trustedfirmware.org/trusted-firmware-m.git/tree/docs/coding_gui…>. I have these proposals: * Change the rule of the 80 character column width: * Max 80 characters length. * Column length is max 80 character in first place, but there are exceptions when length could be MAX 120 character: * Degrades code understandability: short, obscured variable names; awkward line breaks * Maximum 1% of the lines can exceed 80 charter length. * Might remove this rule, because in many cases we are not complaint with it. For example PSA Crypto API: o Order function parameters so that input params are before output params. o https://git.trustedfirmware.org/trusted-firmware-m.git/tree/interface/inclu… I'm interested in your opinions! Other rules also can be revisited! Tamas

6 years, 3 months

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Re: [TF-M] Using git submodules for dependencies?

by Kevin Townsend

Hi, I'm reviving an old thread (sorry, probably bad form), but we're running into this issue again now with Zephyr (and probably with FreeRTOS later) where we need to produce a TF-M 'module' got Zephyr that we can include in the zephyr github repo. With the current approach for TF-M, we will have to produce 5 forks of the 5 projects/dependencies, which seems superfluous versus a single 'master' TF-M repo with the four dependencies as sub-modules, and I can't see why technically this would be more of a challenge for end-users (you can even init the submodules at the same time you clone the parent TF-M repo so it's actually LESS work), and means a single repo where all of the dependency versions can change over time in sync with the various releases. I may be missing or misunderstanding an obvious technical drawback made earlier, but I haven't understand why submodules are less desirable than 1+4 independent repos both for TF-M and any projects on the RTOS side depending on it? Kevin On Wed, 10 Jul 2019 at 18:09, Kumar Gala via TF-M < tf-m(a)lists.trustedfirmware.org> wrote: > How would a git repo with some submodules preclude any of the things you > mentioned? I guess my initial thought is that there would be an “uber” > repo in which TFM, CMSIS and mbedcrypto would all be sub-modules. > > There’s also the option of using cmake ExternalProject ( > https://cmake.org/cmake/help/latest/module/ExternalProject.html?highlight=e… > ) > > Or west > > https://pypi.org/project/west/ > > - k > > > On Jul 10, 2019, at 8:47 AM, Ashutosh Singh via TF-M < > tf-m(a)lists.trustedfirmware.org> wrote: > > > > Hi, > > > > Initial idea was to keep the external dependencies clearly visible (from > code auditability point of view). With submodule we can't checkout the > dependencies out of tree. Since the dependencies need to be checked out > only once it was considered acceptable nuisance, until you do a pull and > version of the dependencies have changed. > > 'repo' was considered as well, but repo tool doesn't work on > windows(last I checked). > > > > Thanks, > > Ashu > > > > -----Original Message----- > > From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Kumar > Gala via TF-M > > Sent: 10 July 2019 09:50 > > To: Andrej Butok <andrey.butok(a)nxp.com> > > Cc: tf-m(a)lists.trustedfirmware.org > > Subject: Re: [TF-M] Using git submodules for dependencies? > > > > There can always be a fork of the sources kept in TF-M repos to handle > the case of needing local modifications for some reason. > > > > - k > > > >> On Jul 10, 2019, at 3:48 AM, Andrej Butok via TF-M < > tf-m(a)lists.trustedfirmware.org> wrote: > >> > >> Hi Kevin, > >> > >> Only if 100% of the external project source code is used without > change. > >> Even if it is valid now, nobody will give you this guarantee in future. > >> > >> Regards, > >> Andrej > >> > >> -----Original Message----- > >> From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Kevin > Townsend via TF-M > >> Sent: Wednesday, July 10, 2019 10:41 AM > >> To: Thomas Törnblom via TF-M <tf-m(a)lists.trustedfirmware.org> > >> Subject: [TF-M] Using git submodules for dependencies? > >> > >> Hi, > >> > >> I'm currently working on integrating TF-M into Zephyr and getting TF-M > working with QEMU. Part of that work is simplifying the setup and build > process to generate a TF-M secure library. > >> > >> Was the idea of git submodules for dependencies considered and rejected? > >> Using sub-modules would reduce the number of setup steps required, and > pair external dependency versions with specific TF-M commits/releases. > >> > >> There may be a valid reason this approach was rejected, but it seems > like a sensible option on the surface? > >> > >> Best regards, > >> Kevin Townsend > >> -- > >> TF-M mailing list > >> TF-M(a)lists.trustedfirmware.org > >> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.tru… > >> -- > >> TF-M mailing list > >> TF-M(a)lists.trustedfirmware.org > >> https://lists.trustedfirmware.org/mailman/listinfo/tf-m > > > > -- > > TF-M mailing list > > TF-M(a)lists.trustedfirmware.org > > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > > -- > > TF-M mailing list > > TF-M(a)lists.trustedfirmware.org > > https://lists.trustedfirmware.org/mailman/listinfo/tf-m > > -- > TF-M mailing list > TF-M(a)lists.trustedfirmware.org > https://lists.trustedfirmware.org/mailman/listinfo/tf-m >

6 years, 3 months

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Design proposal for enabling byte-aligned flash devices.

by Minos Galanakis

Hi all, I have recently submitted the following design proposal, currently under review, which is aimed at enabling byte-aligned flash devices on TF-M https://review.trustedfirmware.org/c/trusted-firmware-m/+/2392 Any feedback, suggestions would be greatly appreciated. Regards, Minos Galanakis

6 years, 3 months

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Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure

by David Hu (Arm Technology China)

Hi Qixiang, It is a very reasonable suggestion. I will write it down as a further improvement. Thanks a lot. Best regards, Hu Ziji -----Original Message----- From: Qixiang Xu (Arm Technology China) Sent: Tuesday, November 26, 2019 2:18 PM To: David Hu (Arm Technology China) <David.Hu(a)arm.com>; Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com>; Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org. Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, When we add a platform into the TF-M, we need modify the top makefile to add it into build the system build, maybe we can consider to fix this issue at the same time. My proposal has changed a little from your proposal: ├── ext │ ├── arm │ │ ├── common │ │ │ └── arm_common.c │ │ ├── mps2 │ │ │ ├── an519 │ │ │ │ ├── an519.c │ │ │ │ └── plat.cmake │ │ │ ├── an521 │ │ │ │ ├── an521.c │ │ │ │ └── plat.cmake │ │ │ ├── an539 │ │ │ │ ├── an539.c │ │ │ │ └── plat.cmake │ │ │ ├── mps2.cmake │ │ │ └── mps2_common.c │ │ ├── mps3 │ │ │ ├── an524 │ │ │ │ ├── an524.c │ │ │ │ └── plat.cmake │ │ │ ├── mps3.cmake │ │ │ └── mps3_common.c │ │ └── musca │ │ ├── a │ │ │ ├── a.c │ │ │ └── plat.cmake │ │ ├── b1 │ │ │ ├── b1.c │ │ │ └── plat.cmake │ │ ├── musca.cmake │ │ ├── musca_common.c │ │ └── s1 │ │ ├── plat.cmake │ │ └── s1.c │ └── vendor1 │ ├── board1 │ │ ├── board1.cmake │ │ ├── board1_common.c │ │ ├── var1 │ │ │ ├── plat.cmake │ │ │ └── var1.c │ │ └── var2 │ │ ├── plat.cmake │ │ └── var2.c │ ├── board2 │ │ ├── board1.cmake │ │ ├── board1_common.c │ │ ├── var1 │ │ │ ├── plat.cmake │ │ │ └── var1.c │ │ └── var2 │ │ ├── plat.cmake │ │ └── var2.c │ └── common │ └── vendor1_common.c In the different vendor, we have different boards and the board have different variants, so the plat.cmake can include the boardx.cmake and the boardx.cmake can include the vendorx.cmake. To build the TF-M, we change the command line from PLAT=xxxx to PLAT=vendorX/boardY/varZ. The top makefile finds the plat.cmake from the platform directory with PLAT variable which passed by command line. So we don't need touch the top makefile when we add a new platform. Thanks. Best Regards, Qixiang Xu -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, November 26, 2019 11:05 AM To: Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com>; Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi Edison, IMO, `target` folder is still required to separate the platforms from common files and drivers. Best regards, Hu Ziji -----Original Message----- From: Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com> Sent: Monday, November 25, 2019 11:48 AM To: David Hu (Arm Technology China) <David.Hu(a)arm.com>; Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, Support the idea to support more different platforms and common drivers. One suggestion for your proposal, is it necessary to add the "target" folders? It looks like we can short the folder depth. What about this? Platform |-- ext | |--Partner ABC | | |-- *common drivers and files* | | |-- target_abc_1 | | | |-- target_abc_1.cmake | | |-- target_abc_2 | | | |-- Partner XYZ | | |-- *common drivers and files* | | |-- target_xyz_1 | | | |-- target_xyz_1.cmake | | |-- target_xyz_2 | |-- ... |--include Thanks, Edison -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Monday, November 25, 2019 10:33 AM To: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi Andrei, Thanks a lot for the positive feedback. Adding another common layer for all the partners sounds similar to Andrej's proposal. In my very own opinion, currently CMSIS can cover the general arch features. The general multi-core mailbox code is kept in TF-M Core. But I won't be surprised if additional common features should be extracted and kept under platform folder. Apparently, we need more partners/platforms on TF-M to specify the requirements. I'd suggest that we can discuss the additional common part as another topic in a separated email thread. Best regards, Hu Ziji -----Original Message----- From: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com> Sent: Saturday, November 23, 2019 3:49 AM To: David Hu (Arm Technology China) <David.Hu(a)arm.com> Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, I support this idea as it is a quick and easy solution for the growing list of supported platforms. Perhaps, I would also add another common layer in platform/ext/target to keep platform code that can be reused by other partners in their platforms - for the multicore mailbox code, for example. Thanks, Andrei -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, November 19, 2019 7:20 PM To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi all, I'd like to propose to adjust the platform folder structure. Would you please check the details below and share your opinions? Any suggestion or feedback will be very helpful. In current platform folder structure, all the targets are listed together at the same level under `target` folder. Platform |-- ext |-- . |-- target_xxx.cmake |-- . |-- target_zzz.cmake |-- target |-- mps2 |-- musca_a |-- . A drawback is that, there are many duplicated files in those targets folders. It may become difficult to maintain the target support when targets, platforms, drivers and features continue growing. - A platform may have a series of variants. If each variant target folder has to contain a copy of platform drivers or library, it is difficult to align and maintain the duplicated drivers. - All targets belonging to the same platform contain the duplicated common operation files or configurations, such as HUK, NV counter and platform configurations. A small change has to be applied to multiple identical files. To solve the duplicated files management issue, I'd propose to insert partner folders under `target` and move the targets under the partner folder. The proposed structure looks like the following: Z` The ideas behind the proposal: - It is more close to the platform support structure in popular RTOSs. It can be more convenient for partners to port platform support to TF-M from existing projects. - Common drivers and operations implementations can be gathered into partner/platform specific folder. Thus each partner/platform folder doesn't have to hold a duplicated copy. - It is easier for partners to fully organize and maintain their platform folders with full permission. More layers can be added under a specific partner folder, such as diverse platforms. - Put the target specific cmake config file back into the target folder. It can make the `platform` folder much more clear. Best regards, Hu Ziji -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m This message and any attachments may contain confidential information from Cypress or its subsidiaries. If it has been received in error, please advise the sender and immediately delete this message. -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Re: [TF-M] Including board-specific libraries in TF-M

by Tamas Ban

Hi Kevin, Currently there is no established pattern how to link a library to secure code on platform level. Currently only services and crypto libraries are built as libraries but not platform code. I think the suggested solution (put a `target_link_libraries` entry in that platform/ext/*.cmake file) is feasible, because the platform level cmake files are included by the secure_fw/CMakeList.txt (through CommonConfig.cmake) and in this way the library will be linked to secure code. We have similar solution in case of CC312 library integration: https://review.trustedfirmware.org/#/c/trusted-firmware-m/+/2526/6/platform… Tamas -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Kevin Townsend via TF-M Sent: 25 November 2019 16:47 To: Thomas Törnblom via TF-M <tf-m(a)lists.trustedfirmware.org> Subject: [TF-M] Including board-specific libraries in TF-M Hi, While working on upstreaming support for a new MCU in TF-M, I've bumped into a requirement to link against an external library that's required for the device init sequence. I may (or may not) be able to remove this dependency, but is there currently a cross-platform mechanism to link .a files (etc.) during the build process at the platform/ext/*.cmake level? It's possible to put something together for this one target ('target_link_libraries'???), but I was wondering if I'm missing an instance where this is handled at a higher level, similar to how the RTX library is handled in the same makefiles: if (DEFINED CMSIS_5_DIR) # Not all projects define CMSIS_5_DIR, only the ones that use it. set(RTX_LIB_PATH "${CMSIS_5_DIR}/CMSIS/RTOS2/RTX/Library/GCC/libRTX_V8MMN.a") endif() Best regards, Kevin -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure

by Qixiang Xu (Arm Technology China)

Correct the mail list address to send it again. -----Original Message----- From: Qixiang Xu (Arm Technology China) Sent: Tuesday, November 26, 2019 2:18 PM To: David Hu (Arm Technology China) <David.Hu(a)arm.com>; Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com>; Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org. Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, When we add a platform into the TF-M, we need modify the top makefile to add it into build the system build, maybe we can consider to fix this issue at the same time. My proposal has changed a little from your proposal: ├── ext │ ├── arm │ │ ├── common │ │ │ └── arm_common.c │ │ ├── mps2 │ │ │ ├── an519 │ │ │ │ ├── an519.c │ │ │ │ └── plat.cmake │ │ │ ├── an521 │ │ │ │ ├── an521.c │ │ │ │ └── plat.cmake │ │ │ ├── an539 │ │ │ │ ├── an539.c │ │ │ │ └── plat.cmake │ │ │ ├── mps2.cmake │ │ │ └── mps2_common.c │ │ ├── mps3 │ │ │ ├── an524 │ │ │ │ ├── an524.c │ │ │ │ └── plat.cmake │ │ │ ├── mps3.cmake │ │ │ └── mps3_common.c │ │ └── musca │ │ ├── a │ │ │ ├── a.c │ │ │ └── plat.cmake │ │ ├── b1 │ │ │ ├── b1.c │ │ │ └── plat.cmake │ │ ├── musca.cmake │ │ ├── musca_common.c │ │ └── s1 │ │ ├── plat.cmake │ │ └── s1.c │ └── vendor1 │ ├── board1 │ │ ├── board1.cmake │ │ ├── board1_common.c │ │ ├── var1 │ │ │ ├── plat.cmake │ │ │ └── var1.c │ │ └── var2 │ │ ├── plat.cmake │ │ └── var2.c │ ├── board2 │ │ ├── board1.cmake │ │ ├── board1_common.c │ │ ├── var1 │ │ │ ├── plat.cmake │ │ │ └── var1.c │ │ └── var2 │ │ ├── plat.cmake │ │ └── var2.c │ └── common │ └── vendor1_common.c In the different vendor, we have different boards and the board have different variants, so the plat.cmake can include the boardx.cmake and the boardx.cmake can include the vendorx.cmake. To build the TF-M, we change the command line from PLAT=xxxx to PLAT=vendorX/boardY/varZ. The top makefile finds the plat.cmake from the platform directory with PLAT variable which passed by command line. So we don't need touch the top makefile when we add a new platform. Thanks. Best Regards, Qixiang Xu -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, November 26, 2019 11:05 AM To: Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com>; Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi Edison, IMO, `target` folder is still required to separate the platforms from common files and drivers. Best regards, Hu Ziji -----Original Message----- From: Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com> Sent: Monday, November 25, 2019 11:48 AM To: David Hu (Arm Technology China) <David.Hu(a)arm.com>; Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, Support the idea to support more different platforms and common drivers. One suggestion for your proposal, is it necessary to add the "target" folders? It looks like we can short the folder depth. What about this? Platform |-- ext | |--Partner ABC | | |-- *common drivers and files* | | |-- target_abc_1 | | | |-- target_abc_1.cmake | | |-- target_abc_2 | | | |-- Partner XYZ | | |-- *common drivers and files* | | |-- target_xyz_1 | | | |-- target_xyz_1.cmake | | |-- target_xyz_2 | |-- ... |--include Thanks, Edison -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Monday, November 25, 2019 10:33 AM To: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi Andrei, Thanks a lot for the positive feedback. Adding another common layer for all the partners sounds similar to Andrej's proposal. In my very own opinion, currently CMSIS can cover the general arch features. The general multi-core mailbox code is kept in TF-M Core. But I won't be surprised if additional common features should be extracted and kept under platform folder. Apparently, we need more partners/platforms on TF-M to specify the requirements. I'd suggest that we can discuss the additional common part as another topic in a separated email thread. Best regards, Hu Ziji -----Original Message----- From: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com> Sent: Saturday, November 23, 2019 3:49 AM To: David Hu (Arm Technology China) <David.Hu(a)arm.com> Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, I support this idea as it is a quick and easy solution for the growing list of supported platforms. Perhaps, I would also add another common layer in platform/ext/target to keep platform code that can be reused by other partners in their platforms - for the multicore mailbox code, for example. Thanks, Andrei -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, November 19, 2019 7:20 PM To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi all, I'd like to propose to adjust the platform folder structure. Would you please check the details below and share your opinions? Any suggestion or feedback will be very helpful. In current platform folder structure, all the targets are listed together at the same level under `target` folder. Platform |-- ext |-- . |-- target_xxx.cmake |-- . |-- target_zzz.cmake |-- target |-- mps2 |-- musca_a |-- . A drawback is that, there are many duplicated files in those targets folders. It may become difficult to maintain the target support when targets, platforms, drivers and features continue growing. - A platform may have a series of variants. If each variant target folder has to contain a copy of platform drivers or library, it is difficult to align and maintain the duplicated drivers. - All targets belonging to the same platform contain the duplicated common operation files or configurations, such as HUK, NV counter and platform configurations. A small change has to be applied to multiple identical files. To solve the duplicated files management issue, I'd propose to insert partner folders under `target` and move the targets under the partner folder. The proposed structure looks like the following: Z` The ideas behind the proposal: - It is more close to the platform support structure in popular RTOSs. It can be more convenient for partners to port platform support to TF-M from existing projects. - Common drivers and operations implementations can be gathered into partner/platform specific folder. Thus each partner/platform folder doesn't have to hold a duplicated copy. - It is easier for partners to fully organize and maintain their platform folders with full permission. More layers can be added under a specific partner folder, such as diverse platforms. - Put the target specific cmake config file back into the target folder. It can make the `platform` folder much more clear. Best regards, Hu Ziji -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m This message and any attachments may contain confidential information from Cypress or its subsidiaries. If it has been received in error, please advise the sender and immediately delete this message. -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

6 years, 3 months

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Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure

by Edison Ai (Arm Technology China)

Hi David, Support the idea to support more different platforms and common drivers. One suggestion for your proposal, is it necessary to add the "target" folders? It looks like we can short the folder depth. What about this? Platform |-- ext | |--Partner ABC | | |-- *common drivers and files* | | |-- target_abc_1 | | | |-- target_abc_1.cmake | | |-- target_abc_2 | | | |-- Partner XYZ | | |-- *common drivers and files* | | |-- target_xyz_1 | | | |-- target_xyz_1.cmake | | |-- target_xyz_2 | |-- ... |--include Thanks, Edison -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Monday, November 25, 2019 10:33 AM To: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com>; tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi Andrei, Thanks a lot for the positive feedback. Adding another common layer for all the partners sounds similar to Andrej's proposal. In my very own opinion, currently CMSIS can cover the general arch features. The general multi-core mailbox code is kept in TF-M Core. But I won't be surprised if additional common features should be extracted and kept under platform folder. Apparently, we need more partners/platforms on TF-M to specify the requirements. I'd suggest that we can discuss the additional common part as another topic in a separated email thread. Best regards, Hu Ziji -----Original Message----- From: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com> Sent: Saturday, November 23, 2019 3:49 AM To: David Hu (Arm Technology China) <David.Hu(a)arm.com> Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, I support this idea as it is a quick and easy solution for the growing list of supported platforms. Perhaps, I would also add another common layer in platform/ext/target to keep platform code that can be reused by other partners in their platforms - for the multicore mailbox code, for example. Thanks, Andrei -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, November 19, 2019 7:20 PM To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi all, I'd like to propose to adjust the platform folder structure. Would you please check the details below and share your opinions? Any suggestion or feedback will be very helpful. In current platform folder structure, all the targets are listed together at the same level under `target` folder. Platform |-- ext |-- . |-- target_xxx.cmake |-- . |-- target_zzz.cmake |-- target |-- mps2 |-- musca_a |-- . A drawback is that, there are many duplicated files in those targets folders. It may become difficult to maintain the target support when targets, platforms, drivers and features continue growing. - A platform may have a series of variants. If each variant target folder has to contain a copy of platform drivers or library, it is difficult to align and maintain the duplicated drivers. - All targets belonging to the same platform contain the duplicated common operation files or configurations, such as HUK, NV counter and platform configurations. A small change has to be applied to multiple identical files. To solve the duplicated files management issue, I'd propose to insert partner folders under `target` and move the targets under the partner folder. The proposed structure looks like the following: Platform |-- ext |-- target | |-- Partner ABC | |-- *common drivers and files* | |-- target_abc_1 | | |-- target_abc_1.cmake | |-- target_abc_2 | |-- Partner XYZ | |-- *common drivers and files* | |-- target_xyz_1 | | |-- target_xyz_1.cmake | |-- target_xyz_2 |-- ... The ideas behind the proposal: - It is more close to the platform support structure in popular RTOSs. It can be more convenient for partners to port platform support to TF-M from existing projects. - Common drivers and operations implementations can be gathered into partner/platform specific folder. Thus each partner/platform folder doesn't have to hold a duplicated copy. - It is easier for partners to fully organize and maintain their platform folders with full permission. More layers can be added under a specific partner folder, such as diverse platforms. - Put the target specific cmake config file back into the target folder. It can make the `platform` folder much more clear. Best regards, Hu Ziji -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m This message and any attachments may contain confidential information from Cypress or its subsidiaries. If it has been received in error, please advise the sender and immediately delete this message. -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Including board-specific libraries in TF-M

by Kevin Townsend

Hi, While working on upstreaming support for a new MCU in TF-M, I've bumped into a requirement to link against an external library that's required for the device init sequence. I may (or may not) be able to remove this dependency, but is there currently a cross-platform mechanism to link .a files (etc.) during the build process at the platform/ext/*.cmake level? It's possible to put something together for this one target ('target_link_libraries'???), but I was wondering if I'm missing an instance where this is handled at a higher level, similar to how the RTX library is handled in the same makefiles: if (DEFINED CMSIS_5_DIR) # Not all projects define CMSIS_5_DIR, only the ones that use it. set(RTX_LIB_PATH "${CMSIS_5_DIR}/CMSIS/RTOS2/RTX/Library/GCC/libRTX_V8MMN.a") endif() Best regards, Kevin

6 years, 3 months

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Re: [TF-M] Python script to generate tf-m dependencies in JSON format

by Devaraj Ranganna

Hi, Thanks for your inputs. The original intention of the script was to not to modify the origin of the information i.e rst file as Minos quoted and also to avoid duplication of information. Considering all the new information, I think we should try to separate build and post-build dependencies (ex: srec_cat). This separation will allow us to handle all the build dependencies using "cmake" and then we can explore the possible option on how to handle post-build dependencies. @Minos, I believe all sw dependencies defined in https://ci.trustedfirmware.org/job/tf-m-build-test-nightly/lastSuccessfulBu… are already validated in cmake. Adding other library dependencies into it will make it complete. This way we don’t need mention library dependency in document anymore and still achieve single source of information. @George, I think first 3 question can be answered if we decide to go ahead with handling build dependencies with cmake. Thanks, Dev On 21/10/2019, 15:56, "TF-M on behalf of Gyorgy Szing via TF-M" <tf-m-bounces(a)lists.trustedfirmware.org on behalf of tf-m(a)lists.trustedfirmware.org> wrote: Hi, We need to keep an eye on some factors which the current prototype ignores. Some that come to my mind: 1. which component shall be the owner of sw dependency info? (Documentation, cmake, something else?). 2. how does the solution scale? (i.e. be able to handle platform specific dependencies). 3. how we handle build configuration specific dependencies? (i.e. if I don't build a service then some dependency is not needed). 4. As Minos mentioned some environment verification is already done by CMake. Is it worth to extract all dependency info (tooling + SW) into a dedicated place? /George -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of Minos Galanakis via TF-M Sent: 21 October 2019 16:47 To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: Re: [TF-M] Python script to generate tf-m dependencies in JSON format Hi, Making CMAKE able to output the dependencies it is expecting is the quickest path, but it is only able to resolve a subset of the requirements captured by the documenation. .<https://ci.trustedfirmware.org/job/tf-m-build-test-nightly/lastSuccessfulBu…> For example the cmake version itself, or tools like srec_cat used to produce MUSCA binaries. There are certain dependencies that are provided by other means ( package managers ) . So while I agree that it looks quite odd, it is hierarchically the origin of the information we are trying to capture. Minos ________________________________ From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> on behalf of Kumar Gala via TF-M <tf-m(a)lists.trustedfirmware.org> Sent: 21 October 2019 15:25 To: Devaraj Ranganna <Devaraj.Ranganna(a)arm.com> Cc: tf-m(a)lists.trustedfirmware.org <tf-m(a)lists.trustedfirmware.org> Subject: Re: [TF-M] Python script to generate tf-m dependencies in JSON format This feels backwards, parsing rst to determine build steps, dependancies doesn’t feel correct. I think it would be better to codify the build steps in scripts of CMake, etc than reference those in the .rst instead. - k > On Oct 21, 2019, at 9:03 AM, Devaraj Ranganna via TF-M <tf-m(a)lists.trustedfirmware.org> wrote: > > Hi, > > Currently tf-m dependencies are only listed in documentation file (docs/user_guides/tfm_build_instruction.rst) and there is no option to programmatically retrieve it. In order to integrate tf-m into non-secure side RTOSes, it is very essential to be able build tf-m automatically without manual intervention (may be as part of CI). > > The tf-m CI build system uses fixed values for dependencies and it is the responsibility of developers who update the dependencies to update the documentation and the CI build system. > > If non-secure side RTOSes use fix values for tf-m dependencies then either build or regression tests may fail when tf-m updates dependencies. In order avoid this issue, I’m proposing the following > > > * Use a reStructuredText grid table to define dependencies > * Python script to produce a json file in the root directory when invoked as standalone script or to return a json string when imported into another python script > > I’ve created a patch set (https://review.trustedfirmware.org/c/trusted-firmware-m/+/2333) with above changes. I’d appreciate your inputs/feedback on this proposal. > > This will also ensure that dependencies are captured in one place (docs/user_guides/tfm_build_instruction.rst). > > Additionally, have another python script as “post-checkout” git hook which can parse dependencies in JSON format and clone them automatically when tf-m repository is cloned or when switching from master to feature branch and vice versa. > > Thanks, > Dev > IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. > -- > TF-M mailing list > TF-M(a)lists.trustedfirmware.org > https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m

6 years, 3 months

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Re: [TF-M] [EXTERNAL] RE: secure interrupt handlng in IPC mode

by Adrian Shaw

Page 43 of the PSA Firmware Framework states the following: 1. Even when using these techniques, the latency involved in scheduling a Secure Partition to handle interrupts might not be acceptable for certain types of peripheral. The SPM can implement its own independent device driver model, which provides improved response latency, however, this comes at the cost of portability and security. The SPM’s independent device driver model is not within the scope of this specification. So you are allowed (if you want to implement it in an SP). Best, Adrian On 19 Nov 2019, at 08:07, Edison Ai (Arm Technology China) via TF-M <tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>> wrote: Hi Alan, Thanks for your information. So I think there are 2 discussion here: 1. You had met unexpected behavior when a secure interrupt is configured with a lower priority than pendsv. As I understand, if you just move the pendsv in a higher priority, it should be ok. Just as I say in former mail that the pendsv handler will be processed every time, but it still can works. In this case, the 'd' point you list should not extend to SP. 2. You say that "the SP while it is processing the ISR". Do you mean you want to add a SP ISR? Right? please correct me if it is not. If so the current discussion should be if it is allowed to process ISR in SP: - If allow, "A NSPE interrupt is not allowed to preempt SPE ISR" could be understood as a NSPE interrupt is not allowed to preempt SP ISR. So I think this why you assume the SPE needs to be restored to the IDLE state. - If no. you assume will not reasonable. I think the answer should be NO. PSA FF gives us several APIs to process the interrupt: psa_wait, psa_get, psa_eoi based on the message in the IPC model. In this mechanism, ISR needs to send a signal to SP and let SP process data after scheduling. It is cleaner and security. Thanks, Edison -----Original Message----- From: DeMars, Alan <ademars(a)ti.com<mailto:ademars@ti.com>> Sent: Friday, November 15, 2019 4:48 AM To: Edison Ai (Arm Technology China) <Edison.Ai(a)arm.com<mailto:Edison.Ai@arm.com>> Cc: 'tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>' <tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org>> Subject: RE: [EXTERNAL] RE: secure interrupt handlng in IPC mode I don't know that the SPE needs to be restored to its IDLE state prior to a thread pre-empting NS interrupt occurring. I just assumed that these 2 rules required it: a. All of the SPE interrupts must have higher priority than NSPE interrupts d. A NSPE interrupt is not allowed to preempt SPE ISR (I assumed that this rule applies to the SP while it is processing the ISR as well). Alan -----Original Message----- From: TF-M [mailto:tf-m-bounces@lists.trustedfirmware.org] On Behalf Of Edison Ai (Arm Technology China) via TF-M Sent: Thursday, November 14, 2019 12:58 AM To: tf-m(a)lists.trustedfirmware.org<mailto:tf-m@lists.trustedfirmware.org> Cc: nd Subject: Re: [TF-M] [EXTERNAL] RE: secure interrupt handlng in IPC mode Hi Alan, I have one question, why the SPE needs restored to its IDLE state prior to a thread pre-empting NS interrupt occurring? About a secure interrupt is configured with a lower priority than pendsv, I do not think it is a good idea. The pendsv is used to trigger the scheduler to switch thread. The normal interrupt process should like this: Interrupt happen -> jump into related ISR -> do necessary process such as mask interrupt status, send even or signal to related SP. -> set pendsv to trigger scheduler -> jump out ISR -> scheduler to decide which thread to run. In these sequences, if there are many interrupts happen at the same time, and high priority interrupt will interrupt low priority interrupt. Each ISR will trigger pendsv. But only one pendsv hander function needs to be processed. If we set the pendsv with high priority. Each interrupt will trigger pendsv and the pendsv handler will be processed every time. It will be more complex and spend more CPU time. Sorry that I do not know what is your detail scenario, and it will be more clear and helpful if you can provide more information. Thanks, Edison -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org<mailto:tf-m-bounces@lists.trustedfirmware.org>> On Behalf Of Ken Liu (Arm Technology China) via TF-M Sent: Thursday, November 14, 2019 3:12 PM To: 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] [EXTERNAL] RE: secure interrupt handlng in IPC mode Hi Alan, I have created the cooperative scheduling doc link here for comment: https://review.trustedfirmware.org/c/trusted-firmware-m/+/2466 BR /Ken -----Original Message----- From: DeMars, Alan <ademars(a)ti.com> Sent: Thursday, November 14, 2019 10:44 AM To: Mate Toth-Pal <Mate.Toth-Pal(a)arm.com> Cc: tf-m(a)lists.trustedfirmware.org; nd <nd(a)arm.com>; Ken Liu (Arm Technology China) <Ken.Liu(a)arm.com> Subject: Re: [EXTERNAL] RE: secure interrupt handlng in IPC mode Mate, Apart from the surprising behavior actually working to my benefit, my concern is the implications of violating the Cooperative Scheduling Rules I quoted below. The normal behavior (ie the SP running in thread mode with no exception priority when servicing a secure interrupt) seems to violate those rules. Is this a problem for the scheduler? Alan On Nov 13, 2019, at 5:08 AM, Mate Toth-Pal <Mate.Toth-Pal(a)arm.com> wrote: Hi Alan, That's a quite difficult question I think. At first look, it seems a to be a valid thinking that a secure partition that is handling an IRQ signal should be considered as an SPE ISR. However implementing this seems to be a nontrivial task. The code in the secure partitions is organised into a single thread, that executes a while loop, calls 'psa_wait()' in every iteration, and acts on the signals returned by it. The phenomenon we observed with your setup was the following: 1. When the Handler mode interrupt handler, that had lower priority than the PendSV reenabled interrupts after setting the signal, was interrupted by the PendSV handler. 2. PendSV handler scheduled the partition with the interrupt signal set, and did an exception return to thread mode. 3. The code of the Secure partition thread started executing, in Thread mode, but with the priority of the interrupt from the first point, as that interrupt handler was interrupted before it could do exception return to acknowledge the handling of the interrupt in the NVIC. 4. After the partition thread code called psa_wait again, the scheduler restored the context of the interrupt handler from the first point, that handler did an exception return, and everything is 'back to normal' Now, if I understand properly, your proposal is to make the conditions in point 3. to be mandatory for any scheduler implementation. To make this happen in TF-M, all the secure interrupts should have lower priority than the PendSV handler. This is necessary so that the above detailed behaviour is valid for all the interrupts. The problem with this is that the SPM has no control over which signal the code of the secure partition is going to execute. So in the current design a secure partition might decide to handle a service call signal (if there is any) instead of an IRQ signal, and that would be against our intention. We might be able to modify psa_wait to return only IRQ signals if there is any active, but that would be a violation of the PSA FF spec. Regards, Mate From: DeMars, Alan <ademars(a)ti.com> Sent: 12 November 2019 17:47 To: Mate Toth-Pal <Mate.Toth-Pal(a)arm.com> Cc: Ken Liu (Arm Technology China) <Ken.Liu(a)arm.com> Subject: RE: secure interrupt handlng in IPC mode You can CC the tf-m mailing list. From: Mate Toth-Pal [mailto:Mate.Toth-Pal@arm.com] Sent: Tuesday, November 12, 2019 8:02 AM To: DeMars, Alan Cc: Ken Liu (Arm Technology China) Subject: [EXTERNAL] RE: secure interrupt handlng in IPC mode Hi Alan Would it be OK to you if I cc the TF-M mailing list in my answer? Or if you would prefer that, I can move the 'Cooperative Scheduling Rules' document to the TF-M source (in the docs folder), and you can create a patch for it in gerrit. Thanks, Mate From: DeMars, Alan <mailto:ademars@ti.com> Sent: 11 November 2019 21:05 To: Mate Toth-Pal <mailto:Mate.Toth-Pal@arm.com> Cc: Ken Liu (Arm Technology China) <mailto:Ken.Liu@arm.com> Subject: secure interrupt handlng in IPC mode Hi Mate! I've been doing some thinking about the unexpected behavior we saw when a secure interrupt is configured with a lower priority than pendsv. I think the below statements in the Cooperative Scheduling Rules discussion: a. All of the SPE interrupts must have higher priority than NSPE interrupts d. A NSPE interrupt is not allowed to preempt SPE ISR must extend to the priority level of the SP as it services the interrupt while in thread mode. Otherwise the problem that these rules are meant to avoid can arise: the SPE is not completely restored to its IDLE state prior to a thread pre-empting NS interrupt occurring. So, rather than the behavior we witnessed being unexpected, I think it may have to be enforced. Is this correct thinking? Alan IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

6 years, 3 months

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Re: [TF-M] [RFC] Re-organize the TF-M platform folder structure

by David Hu (Arm Technology China)

Hi Andrei, Thanks a lot for the positive feedback. Adding another common layer for all the partners sounds similar to Andrej's proposal. In my very own opinion, currently CMSIS can cover the general arch features. The general multi-core mailbox code is kept in TF-M Core. But I won't be surprised if additional common features should be extracted and kept under platform folder. Apparently, we need more partners/platforms on TF-M to specify the requirements. I'd suggest that we can discuss the additional common part as another topic in a separated email thread. Best regards, Hu Ziji -----Original Message----- From: Andrei Narkevitch <Andrei.Narkevitch(a)cypress.com> Sent: Saturday, November 23, 2019 3:49 AM To: David Hu (Arm Technology China) <David.Hu(a)arm.com> Cc: nd <nd(a)arm.com> Subject: RE: [RFC] Re-organize the TF-M platform folder structure Hi David, I support this idea as it is a quick and easy solution for the growing list of supported platforms. Perhaps, I would also add another common layer in platform/ext/target to keep platform code that can be reused by other partners in their platforms - for the multicore mailbox code, for example. Thanks, Andrei -----Original Message----- From: TF-M <tf-m-bounces(a)lists.trustedfirmware.org> On Behalf Of David Hu (Arm Technology China) via TF-M Sent: Tuesday, November 19, 2019 7:20 PM To: tf-m(a)lists.trustedfirmware.org Cc: nd <nd(a)arm.com> Subject: [TF-M] [RFC] Re-organize the TF-M platform folder structure Hi all, I'd like to propose to adjust the platform folder structure. Would you please check the details below and share your opinions? Any suggestion or feedback will be very helpful. In current platform folder structure, all the targets are listed together at the same level under `target` folder. Platform |-- ext |-- . |-- target_xxx.cmake |-- . |-- target_zzz.cmake |-- target |-- mps2 |-- musca_a |-- . A drawback is that, there are many duplicated files in those targets folders. It may become difficult to maintain the target support when targets, platforms, drivers and features continue growing. - A platform may have a series of variants. If each variant target folder has to contain a copy of platform drivers or library, it is difficult to align and maintain the duplicated drivers. - All targets belonging to the same platform contain the duplicated common operation files or configurations, such as HUK, NV counter and platform configurations. A small change has to be applied to multiple identical files. To solve the duplicated files management issue, I'd propose to insert partner folders under `target` and move the targets under the partner folder. The proposed structure looks like the following: Platform |-- ext |-- target | |-- Partner ABC | |-- *common drivers and files* | |-- target_abc_1 | | |-- target_abc_1.cmake | |-- target_abc_2 | |-- Partner XYZ | |-- *common drivers and files* | |-- target_xyz_1 | | |-- target_xyz_1.cmake | |-- target_xyz_2 |-- ... The ideas behind the proposal: - It is more close to the platform support structure in popular RTOSs. It can be more convenient for partners to port platform support to TF-M from existing projects. - Common drivers and operations implementations can be gathered into partner/platform specific folder. Thus each partner/platform folder doesn't have to hold a duplicated copy. - It is easier for partners to fully organize and maintain their platform folders with full permission. More layers can be added under a specific partner folder, such as diverse platforms. - Put the target specific cmake config file back into the target folder. It can make the `platform` folder much more clear. Best regards, Hu Ziji -- TF-M mailing list TF-M(a)lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m This message and any attachments may contain confidential information from Cypress or its subsidiaries. If it has been received in error, please advise the sender and immediately delete this message.

6 years, 3 months

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Add hooks for build artifacts custom post-processing

by Andrei Narkevitch

Hi All, I'd like to propose a small change that allows to implement custom build artifacts post processing. In our case, we need to convert tfm_s and tfm_ns binaries into a different file format and implement our custom signing. I expect that other partners eventually may have the same need for build customization. With this, user has an option to implement compiler_custom_post_build command in platform/ext/<platform>.cmake file, and put there all additional custom operations. If command is not implemented, it will be simply ignored. https://review.trustedfirmware.org/c/trusted-firmware-m/+/2588 thanks Andrei This message and any attachments may contain confidential information from Cypress or its subsidiaries. If it has been received in error, please advise the sender and immediately delete this message.

6 years, 3 months

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Fix for broken AN539 build

by Jamie Fox

Hi all, The build is currently broken for AN539 due to a missing include, so I pushed a quick patch to fix it: https://review.trustedfirmware.org/c/trusted-firmware-m/+/2607 Would appreciate it if anyone with a couple of minutes could review it so that we can merge it quickly. Many thanks, Jamie

6 years, 3 months

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