Hello,
TF-M documentation reflects the documents in the main TF-M repository (https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs) only.
There are 5 other repos (tests, tools, extras, CI) with corresponded docs being good to be linked to the main. Looking for ideas / advice on the best way to do that.
The main problem is that Sphinx (the documentation tool) renders files under its configuration directory only, ignoring everything outside of it so reference to external repos is not an easy task. I see several solutions:
1. The main doc points to external files (*.rst) as an external link without rendering it. Like this<https://git.trustedfirmware.org/TF-M/tf-m-tools.git/tree/depend-trace-tool/…>. <-- Simplest way.
2. Create Sphinx doc for each repository, store rendered output in a temporal storage and link the main to generated HTML files.
3. Use intersphinx<https://www.sphinx-doc.org/en/master/usage/extensions/intersphinx.html> to link across repositories. Again, need rendered docs in each repo and additional preparation.
4. Anything else?
Any thoughts or experience to share?
Thanks in advance,
Anton
Looking at the declaration and body of this function, the first parameter is clearly a partition index (index into g_spm_partition_db.partitions[]), and all the call sites in secure_fw/spm/cmsis_func/spm_func.c use it that way. The three call sites in secure_fw/spm/cmsis_func/main.c, though, all pass a PID instead. This happens to work because g_spm_partition_db.partitions[0].static_data->partition_id == 0 and g_spm_partition_db.partitions[1].static_data->partition_id == 1. I don't see anything that guarantees that that will always be true, though.
There is a static function get_partition_id() in secure_fw/spm/cmsis_func/spm_func.c that maps from PID to partition index - should that be exported and called to address this?
Thanks,
Chris Brand
.
Hi,
Reading https://tf-m-user-guide.trustedfirmware.org/technical_references/design_doc… it mentions the plan to move ns_agent_mailbox to have "a positive valued Partition ID in the manifest" and it also states that "A standard Secure Partition gets errors when calling the Extended API".
Given that it will not possible to use the PID to identify the ns_agent_mailbox, how will the Extended API functions know whether the caller is a standard Secure Partition or not?
There was a patch https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/15142 that introduced a flag to identify the ns_agent_tz partition - would this be similar?
Also, is there a plan for which release this functionality is expected to appear?
Thanks,
Chris Brand
Hi everyone,
I have noticed that GCC toolchain uses CONFIG_TFM_FP to determine FP setting while IAR and Clang use TFM_SYSTEM_FP cmake variable. I was not able to find any docs on this variable, and also there is no assignment of this variable in TFM source code (only read operation from this variable).
Is this intendent behavior?
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>
Hi experts,
We are developing a demo based on TF-M framework, and we also developed an
application RoT partition SP1 and a PSA RoT partition SP2.
The secure partition SP1 needs calling a SP2's service during SP1's
init(), when the SP1_init() calls a SP2 service, as the SP2 partition
hasn't
been inited, the SP2_init() executes before handling requestS from SP1.
But the returned connect handle is an invalid handle, return
PSA_ERROR_GENERIC_ERROR.
I am wondering why an invalid connect handle is returned? Any hints?
Best Regards,
Poppy Wu
吴偏偏
Macronix Microelectronics (Suzhou) Co.,Ltd
旺宏微电子（苏州）有限公司
http://www.mxic.com.cn
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Hi,
The next Technical Forum is planned on Thursday, May 26, 7:00-8:00 UTC (East time zone).
Please reply on this email with your proposals for agenda topics.
Recording and slides of previous meetings are here:
https://www.trustedfirmware.org/meetings/tf-m-technical-forum/
Best regards,
Anton
Hi everyone,
While looking through TFM code I have noticed that tfm_arch_is_priv() is defined for v6 and v7 in secure_fw/spm/cmsis_psa/arch/tfm_arch_v6m_v7m.h but not defined for v8.
Also tfm_arch_v6m_v7m.h is located in secure_fw/spm/cmsis_psa/arch/ folder, while tfm_arch_v8m.h is located in secure_fw/spm/include/.
I think that tfm_arch_is_priv() should also be defined for v8 and also tfm_arch_v6m_v7m.h should be moved to secure_fw/spm/include/. If file will be moved then we can clean up some target_include_directories() which used secure_fw/spm/cmsis_psa/arch/ folder.
Any thoughts on this?
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>
Hi Kevin,
Thanks for your instruction.
We're developing an application RoT partition which access a sensor via an
SPI interface(Based on RA6M4_EK development board). After commands have
been transferred to the sensor,
an SPI_TX_INTERRUPT should be triggered, then calls spi_tx_isr().
Now let's put aside binding secure interrupts to each secure partition,
just talk about how to enable SPI interrupts in secure world simply.
Here is my implementation:
1.Configure this SPI peripheral as secure peripheral.
2.Assign SPI tx and rx interrupts to secure state by setting NVIC->ITNS
register.
3.Enable SPI tx and rx interrupts by seeting NVIC->ISER register.
But during debug, I found that spi0_tx_isr() (The ISRs are also placed
under this application RoT partition's folder) has never been triggered.
Is there anything that I miss?
Best Regards,
Poppy Wu
吴偏偏
Macronix Microelectronics (Suzhou) Co.,Ltd
旺宏微电子（苏州）有限公司
http://www.mxic.com.cn
Kevin Peng via TF-M <tf-m(a)lists.trustedfirmware.org>
2022/05/17 09:45
Please respond to
Kevin Peng <Kevin.Peng(a)arm.com>
To
Edward Yang <EdwardYang(a)mxic.com.cn>, "tf-m(a)lists.trustedfirmware.org"
<tf-m(a)lists.trustedfirmware.org>
cc
Subject
[TF-M] Re: Enable SPI interrupt in secure partition
Hi Poppy,
First-Level Interrupt Handling (FLIH) should be recommended in your use
case as you have latency requirements.
Here is an example:
https://git.trustedfirmware.org/TF-M/tf-m-tests.git/tree/test/secure_fw/sui…
You’ll firstly need to add an “irq” item in the manifest and “handling
” it with “FLIH”:
https://git.trustedfirmware.org/TF-M/tf-m-tests.git/tree/test/secure_fw/sui…
And also add the “mmio_regions” item with the associated device (SPI) to
give access permissions to the Secure Partition.
The IRQ handling should be in the Secure Partition:
https://git.trustedfirmware.org/TF-M/tf-m-tests.git/tree/test/secure_fw/sui…
Note that, no PSA APIs are allowed in the handling.
Best Regards,
Kevin
From: Edward Yang via TF-M <tf-m(a)lists.trustedfirmware.org>
Sent: Monday, May 16, 2022 5:38 PM
To: tf-m(a)lists.trustedfirmware.org
Subject: [TF-M] Enable SPI interrupt in secure partition
Hi experts,
Recently we're developing a demo based on TF-M, this demo involves using
SPI module to drive a sensor by sending commands in a secure partition.
And we need to enable SPI receive and send interrupt in this secure
partition and the latency shall be as small as possible. I am wondering
how to implement this secure interrupts. Is there any example code or
instrucstions?
Thanks.
Best Regards,
Poppy Wu
吴偏偏
Macronix Microelectronics (Suzhou) Co.,Ltd
旺宏微电子（苏州）有限公司
http://www.mxic.com.cn
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=====================================================================
Hi experts,
Recently we're developing a demo based on TF-M, this demo involves using
SPI module to drive a sensor by sending commands in a secure partition.
And we need to enable SPI receive and send interrupt in this secure
partition and the latency shall be as small as possible. I am wondering
how to implement this secure interrupts. Is there any example code or
instrucstions?
Thanks.
Best Regards,
Poppy Wu
吴偏偏
Macronix Microelectronics (Suzhou) Co.,Ltd
旺宏微电子（苏州）有限公司
http://www.mxic.com.cn
============================================================================
CONFIDENTIALITY NOTE:
This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as its attachment(s) from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation.
Macronix International Co., Ltd.
=====================================================================
Hi TF-Mers,
There are several versions of mem* API set in the system.
At the very beginning, the whole secure firmware was put in the library model, and it is expected to be self-contained -- at least at the source level as the first step. Hence a 'tfm_mem*' API set is created for secure firmware usage. The same reason for involving 'spm_mem*' in the PSA compliance model.
When we designed HAL for SPM, we noticed that SPM HAL actually run in the same domain as SPM, hence we encouraged developers to use 'spm_mem*' in SPM HAL.
This brings a bit of difficulty, especially when the platform sources are shared for multiple targets, while other targets do not have 'spm_mem*' API.
As 'mem*' is actually common enough (as they are fundamental API of libc), hence redefine the name is applicable only a system is highly self-contained. In our case, using 'mem*' API can bring much convenience. Hence I am thinking to let sources other than SPM use 'mem*' API, they are platform, partitions and runtime libraries. For SPM sources (under secure_fw/spm), a source-level 'spm_mem*' is kept, to keep the possibility to make SPM itself really self-contained. Now it is only source-level because 'spm_mem*' is actually forwarded to 'mem*'.
I am creating a patch to change this, and want to know your opinion.
Thanks.
/Ken
Hi,
Is there anyone using environment variables for the "manifest" attribute in out-of-tree manifest lists?
I'm asking because I'm working to support configurable stack_size for Secure Partitions<https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/15155>.
In the patch the support of environment variables in manifest lists is removed<https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/15155/1/tool…>.
Because I have to call the CMake command configure_file to replace the stack_size symbols (CMake variables<https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/15155/1/secu…> surrounded with "@") with their values.
While configure_file does not recognize environment variables.
If you do have environment variables in manifest list, there is an alternative:
Replace the env. variables with CMake variables surrounded with "@" and set the value of the CMake variables in either config files or command line inputs.
Best Regards,
Kevin
Hi all,
I'd like to cancel tech form in May 12 due to empty agenda.
Best regards,
Hu Ziji
From: David Hu via TF-M <tf-m(a)lists.trustedfirmware.org>
Sent: Thursday, May 5, 2022 2:11 PM
To: tf-m(a)lists.trustedfirmware.org
Cc: nd <nd(a)arm.com>
Subject: [TF-M] Technical Forum call - May 12
Hi,
(On behalf of Anton)
The next Technical Forum is planned on Thursday, May 12, 15:00-16:00 UTC (West time zone).
Please reply on this email with your proposals for agenda topics.
Recording and slides of previous meetings are here:
https://www.trustedfirmware.org/meetings/tf-m-technical-forum/
Best regards,
Hu Ziji
Hi,
the initial attestation token implementation is aligned with this specification:
https://datatracker.ietf.org/doc/html/draft-tschofenig-rats-psa-token-05
This spec is still evolving and there is a newer version which changes the key values of the claims in the token:
https://www.ietf.org/archive/id/draft-tschofenig-rats-psa-token-09.html#tab…<https://www.ietf.org/archive/id/draft-tschofenig-rats-psa-token-09.html%23t…>
This can cause combability issues between token issuer (device) and token verifier (some remote verification service).
This is an ABI change between token issuer and consumer.
The breaking effect would be manifest in unaccepted IAT tokens by the verifier.
On-device side I see these options to make the transition:
- A build-time option could be introduced which determines which range of key numbers to use. The default value would be the new range. To not let new users pick up the old values accidentally. Existing users can notice the incompatibility issue during the integration test and adjust their build command accordingly. However, the old range would be announced as deprecated in the next TF-M release, then will be removed in the next release after.
- Immediate switch over to the new range, without supporting the old range anymore. On the verification service side, an SW update can handle the transition and might be accepting both ranges for a while. I assume the verification service can be updated more easily than remote devices therefore better to handle the compatibility issue there.
- Keeping the support for both ranges for the long term and letting users choose by build time.
Please share your thoughts on:
- Are you aware that the attestation service is used in deployed devices where this transition can cause incompatibility?
- From the above list which option would you vote to support the transition?
Best regards,
Tamas Ban
Hi,
In one of the past tech forums, we claimed that we don't encourage contribution in common logic in assembly, and one of the patches was abandoned because of this. That patch is designed to improve the memset/memcpy performance.
We override these APIs in general because we want the code can be auditable. Then we provided implementations in C, but it shows these implementation does not provide good performance. We want to apply the toolchain provided versions, and looks GNU tool provides the straightest 'byte-copy' version. And armclang involves unnecessary variants which increase the code size a little (not big).
Hence we provide a version with 'tiny' optimization in assembly and mark this patch an exception to the review guidelines, as these under-layer functions won't get changed frequently. We are also seeking an ideal way to apply toolchain versions.
The patch is here for your review:
https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/13735
Thanks.
/Ken
Hello all,
I wanted to let you know that I made the PR which adds encryption on ITS files using the methodology that we discussed before. The encryption is happening in a transparent way for the user, and I tried to avoid major changes in the ITS filesystem. Please add yourself as a reviewer and provide feedback if you think that this is an interesting use case for you.
https://review.trustedfirmware.org/c/TF-M/trusted-firmware-m/+/15096
Regards,
Georgios Vasilakis
Hi,
(On behalf of Anton)
The next Technical Forum is planned on Thursday, May 12, 15:00-16:00 UTC (West time zone).
Please reply on this email with your proposals for agenda topics.
Recording and slides of previous meetings are here:
https://www.trustedfirmware.org/meetings/tf-m-technical-forum/
Best regards,
Hu Ziji
Hello,
I am pleased to announce the new v1.6.0 released of TF-M project.
New major features are:
* MCUboot updated to v1.9.0.
* Mbed TLS updated to v3.1.0 (Support all required PSA Crypto APIs).
* Enabled Secure Function (SFN) Model Partition compliance in IPC backend.
* Interrupt support (both SLIH/FLIH) for the SFN backend.
* MM-IOVEC Support for the SFN backend.
* The following Secure Partitions are converted to SFN model:
* Protected Storage
* Internal Trusted Storage
* Initial Attestation
* FF-M v1.1 SFN Model supported in Profile Small.
* HAL Separation of Library Model and IPC/SFN backend.
* FP support for Armv8.1-M Mainline for IPC backend.
* Simplified build output message and configurable output.
* Halting instead of rebooting on panic in debug build type.
* Automated testing of MCUboot BL2.
* A new driver interface for the CC-312 runtime library as specified in the PSA Unified Driver spec [1]_.
* Added reference bootloader stage 1 (BL1) bootloader for certain platforms.
* A new CC312 ROM library for the BL1.
* Updated documentation structure.
The changes tagged by TF-Mv1.6.0 and located in the release/v1.6.x<https://review.trustedfirmware.org/q/project:TF-M%252Ftrusted-firmware-m+br…> branch at the moment.
In short, they will be integrated with the main branch and be available from there.
Thanks everyone for contribution, review and support this milestone.
Anton
Hi,
The next Technical Forum is planned on Thursday, April 28, 7:00-8:00 UTC (East time zone).
Please reply on this email with your proposals for agenda topics.
Recording and slides of previous meetings are here:
https://www.trustedfirmware.org/meetings/tf-m-technical-forum/
Best regards,
Anton
Hi everyone,
We have discussed the design proposal of supporting secure Flash in tf-m
framework via this mailing list before,now the implementation code of this
external trusted secure storage partition has been uploaded to tf-m-extras
repo for review：
https://review.trustedfirmware.org/c/TF-M/tf-m-extras/+/14953
And the binary component of this patch has also been uploaded to
tf-binaries repo：
https://review.trustedfirmware.org/c/tf-binaries/+/14954
For easy understanding please refer to this document first:
https://review.trustedfirmware.org/c/TF-M/tf-m-extras/+/14953/1/partitions/…
Looking forward to your comments and suggestions.
Best Regards,
Poppy Wu
吴偏偏
Macronix Microelectronics (Suzhou) Co.,Ltd
旺宏微电子（苏州）有限公司
http://www.mxic.com.cn
============================================================================
CONFIDENTIALITY NOTE:
This e-mail and any attachments may contain confidential information and/or personal data, which is protected by applicable laws. Please be reminded that duplication, disclosure, distribution, or use of this e-mail (and/or its attachments) or any part thereof is prohibited. If you receive this e-mail in error, please notify us immediately and delete this mail as well as it attachments from your system. In addition, please be informed that collection, processing, and/or use of personal data is prohibited unless expressly permitted by personal data protection laws. Thank you for your attention and cooperation.
Macronix International Co., Ltd.
=====================================================================
Hello,
The branch release/1.6.x<https://git.trustedfirmware.org/TF-M%2Ftrusted-firmware-m.git/log/?h=refs%2…> has been created, indicating the project feature's freeze and beginning the release process. Expecting to place RC1 tag asap, after successful run of the basic tests.
Let me remind that the code is not frozen, and development can be continued on the main branch.
Thanks,
Anton
Hi All,
TF-M Open CI is back to normal now.
Please feel free to use it.
Thanks,
Xinyu
From: Xinyu Zhang via TF-M <tf-m(a)lists.trustedfirmware.org>
Sent: Monday, April 18, 2022 12:06 PM
To: TF-M mailing list <tf-m(a)lists.trustedfirmware.org>
Subject: [TF-M] TF-M Open CI Down
Hi All,
Sorry to inform you that TF-M Open CI is down for the time being because of Jenkins upgrade.
I'll let you know once it is back to normal.
Apologize for any inconvenience!
Thanks,
Xinyu
Hi All,
Sorry to inform you that TF-M Open CI is down for the time being because of Jenkins upgrade.
I'll let you know once it is back to normal.
Apologize for any inconvenience!
Thanks,
Xinyu
Hi,
The forum is cancelled because of the empty agenda and the assumption that many of us in the west time zone will have a long weekend this week.
Thanks,
Anton
From: Anton Komlev via TF-M <tf-m(a)lists.trustedfirmware.org>
Sent: Wednesday, April 6, 2022 12:43 PM
To: tf-m(a)lists.trustedfirmware.org
Cc: nd <nd(a)arm.com>
Subject: [TF-M] Technical Forum call - April 14
Hi,
The next Technical Forum is planned on Thursday, April 14, 15:00-16:00 UTC (West time zone).
Please reply on this email with your proposals for agenda topics.
Recording and slides of previous meetings are here:
https://www.trustedfirmware.org/meetings/tf-m-technical-forum/
Best regards,
Anton
