- TF-A - lists.trustedfirmware.org

by Nithin S

Hello, There are multiple occurrences in TFA Code where assert statements are used to handle function arguments. But these assert statements are currently enabled only in debug mode. So, I wanted to know that will there be any harm in continuing to use assert statements in production code as well for handling failures? Regards, Nithin S

1 year, 11 months

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Trusted Firmware-A LTS v2.8.9 Release Announcement

by Varun Wadekar

Hello, Trusted Firmware-A LTS version 2.8.9 is now available. This release contains the support for the new Errata ABI and Errata Framework along with the conversion patches for all CPUs. The complete list can be found here<https://ci-builds.trustedfirmware.org/static-files/_5qFfMg2QdoFuFBk6-0oB6Jm…>. We will update the official readthedocs page shortly. Thanks.

1 year, 11 months

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New Defects reported by Coverity Scan for ARM-software/arm-trusted-firmware

by scan-admin＠coverity.com

Hi, Please find the latest report on new defect(s) introduced to ARM-software/arm-trusted-firmware found with Coverity Scan. 5 new defect(s) introduced to ARM-software/arm-trusted-firmware found with Coverity Scan. New defect(s) Reported-by: Coverity Scan Showing 5 of 5 defect(s) ** CID 395749: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 7945 in psa_pake_input() ________________________________________________________________________________________________________ *** CID 395749: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 7945 in psa_pake_input() 7939 default: 7940 (void) step; 7941 status = PSA_ERROR_NOT_SUPPORTED; 7942 goto exit; 7943 } 7944 >>> CID 395749: Control flow issues (UNREACHABLE) >>> This code cannot be reached: "status = psa_driver_wrapper...". 7945 status = psa_driver_wrapper_pake_input(operation, driver_step, 7946 input, input_length); 7947 7948 if (status != PSA_SUCCESS) { 7949 goto exit; 7950 } ** CID 395684: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 7344 in psa_pake_setup() ________________________________________________________________________________________________________ *** CID 395684: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 7344 in psa_pake_setup() 7338 #endif /* PSA_WANT_ALG_JPAKE */ 7339 { 7340 status = PSA_ERROR_NOT_SUPPORTED; 7341 goto exit; 7342 } 7343 >>> CID 395684: Control flow issues (UNREACHABLE) >>> This code cannot be reached: "operation->stage = 1;". 7344 operation->stage = PSA_PAKE_OPERATION_STAGE_COLLECT_INPUTS; 7345 7346 return PSA_SUCCESS; 7347 exit: 7348 psa_pake_abort(operation); 7349 return status; ** CID 395609: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 8002 in psa_pake_get_implicit_key() ________________________________________________________________________________________________________ *** CID 395609: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 8002 in psa_pake_get_implicit_key() 7996 #endif /* PSA_WANT_ALG_JPAKE */ 7997 { 7998 status = PSA_ERROR_NOT_SUPPORTED; 7999 goto exit; 8000 } 8001 >>> CID 395609: Control flow issues (UNREACHABLE) >>> This code cannot be reached: "status = psa_driver_wrapper...". 8002 status = psa_driver_wrapper_pake_get_implicit_key(operation, 8003 shared_key, 8004 sizeof(shared_key), 8005 &shared_key_len); 8006 8007 if (status != PSA_SUCCESS) { ** CID 395586: Control flow issues (DEADCODE) /mbedtls/library/psa_crypto.c: 8019 in psa_pake_get_implicit_key() ________________________________________________________________________________________________________ *** CID 395586: Control flow issues (DEADCODE) /mbedtls/library/psa_crypto.c: 8019 in psa_pake_get_implicit_key() 8013 shared_key, 8014 shared_key_len); 8015 8016 mbedtls_platform_zeroize(shared_key, sizeof(shared_key)); 8017 exit: 8018 abort_status = psa_pake_abort(operation); >>> CID 395586: Control flow issues (DEADCODE) >>> Execution cannot reach the expression "abort_status" inside this statement: "return (status == 0) ? abor...". 8019 return status == PSA_SUCCESS ? abort_status : status; 8020 } 8021 8022 psa_status_t psa_pake_abort( 8023 psa_pake_operation_t *operation) 8024 { ** CID 395567: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 7781 in psa_pake_output() ________________________________________________________________________________________________________ *** CID 395567: Control flow issues (UNREACHABLE) /mbedtls/library/psa_crypto.c: 7781 in psa_pake_output() 7775 default: 7776 (void) step; 7777 status = PSA_ERROR_NOT_SUPPORTED; 7778 goto exit; 7779 } 7780 >>> CID 395567: Control flow issues (UNREACHABLE) >>> This code cannot be reached: "status = psa_driver_wrapper...". 7781 status = psa_driver_wrapper_pake_output(operation, driver_step, 7782 output, output_size, output_length); 7783 7784 if (status != PSA_SUCCESS) { 7785 goto exit; 7786 } ________________________________________________________________________________________________________ To view the defects in Coverity Scan visit, https://u15810271.ct.sendgrid.net/ls/click?upn=HRESupC-2F2Czv4BOaCWWCy7my0P…

1 year, 11 months

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Canceled event with note: TF-A Tech Forum @ Thu Oct 5, 2023 5pm - 6pm (CEST) (tf-a@lists.trustedfirmware.org)

by olivier.deprez＠arm.com

This event has been canceled with a note: "Hi, Cancelling as no topic proposed for this instance. Regards, Olivier." TF-A Tech Forum Thursday Oct 5, 2023 ⋅ 5pm – 6pm Central European Time - Paris We run an open technical forum call for anyone to participate and it is not restricted to Trusted Firmware project members. It will operate under the guidance of the TF TSC. Feel free to forward this invite to colleagues. Invites are via the TF-A mailing list and also published on the Trusted Firmware website. Details are here: https://www.trustedfirmware.org/meetings/tf-a-technical-forum/Tr… Firmware is inviting you to a scheduled Zoom meeting.Join Zoom Meetinghttps://zoom.us/j/9159704974Meeting ID: 915 970 4974One tap mobile+16465588656,,9159704974# US (New York)+16699009128,,9159704974# US (San Jose)Dial by your location        +1 646 558 8656 US (New York)        +1 669 900 9128 US (San Jose)        877 853 5247 US Toll-free        888 788 0099 US Toll-freeMeeting ID: 915 970 4974Find your local number: https://zoom.us/u/ad27hc6t7h   Guests marek.bykowski(a)gmail.com okash.khawaja(a)gmail.com tf-a(a)lists.trustedfirmware.org ~~//~~ Invitation from Google Calendar: https://calendar.google.com/calendar/ You are receiving this email because you are an attendee on the event. To stop receiving future updates for this event, decline this event. Forwarding this invitation could allow any recipient to send a response to the organizer, be added to the guest list, invite others regardless of their own invitation status, or modify your RSVP. Learn more https://support.google.com/calendar/answer/37135#forwarding

1 year, 11 months

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Deprecated platforms in TF-A

by Manish Badarkhe

Hi All, We are currently in the process of preparing for an upcoming release v2.10 [1] and are actively seeking out any deprecated platforms within the TF-A source code. We kindly request all platform owners and contributors to dedicate some time to review the TF-A source code for any platforms that may have been deprecated. If you encounter any platforms that require deprecation but have not yet been labelled as such, we kindly request that you contribute by submitting the required changes to officially mark them as deprecated. You can follow the example provided in [2]. Thank you for your cooperation. [1]: https://trustedfirmware-a.readthedocs.io/en/latest/about/release-informatio… [2]: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/17710 Regards, Manish Badarkhe

1 year, 11 months

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#ifdef PLAT_XLAT_TABLES_DYNAMIC in xlat_tables_context.c

by Nagal, Amit

Hi , When I grep for PLAT_XLAT_TABLES_DYNAMIC in /lib/lib/xlat_tables_v2/ , I see most references for PLAT_XLAT_TABLES_DYNAMIC are enclosed in #if directive. Is there any specific reason why only below mentioned reference for PLAT_XLAT_TABLES_DYNAMIC is covered with #ifdef and not under #if . https://github.com/Xilinx/arm-trusted-firmware/blob/master/lib/xlat_tables_… #ifdef PLAT_XLAT_TABLES_DYNAMIC #define MAX_PHYS_ADDR tf_xlat_ctx.pa_max_address #else #define MAX_PHYS_ADDR tf_xlat_ctx.max_pa #endif Regards Amit

1 year, 11 months

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Platforms without NS-EL2 component

by Manish Pandey2

Hi, I am writing this email to find out any legacy platforms supports in TF-A (upstream or downstream) which does not have any NS-EL2 component running. Because NS-EL2 is present but unused EL3 also need to do a minimal initialization of EL2. The side effect of this is, TF-A currently has extra code in generic path (e.g. cm_prepare_el3_exit() ) to cater for these platforms which is not required for most others. The most likely reason why TF-A introduced support for systems without NS-EL2 was because of UEFI implementation for Windows which didn't initialize NS-EL2 properly. Given that the UEFI spec has said "Use the highest 64 bit non secure privilege level available" for a long time now we are safe to assume that any UEFI implementation will handover to windows at NS-EL2. (similar to Linux) Considering that there are very few platforms which need this code and to keep backward compatibility, we propose to introduce a macro like "INIT_UNUSED_NS_EL2" and guard the code under this[1]. Keep this flag default disabled and get rid of it( along with code) altogether in next couple of releases, if we are certain that none of the platforms using it. Please let me know if you are aware of any such platform configuration. [1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/22716 Thanks Manish

1 year, 11 months

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EHF + OP-TEE

by brian.neely＠analog.com

Hello, Are EHF and OP-TEE (opteed) designed to work together? I'm seeing some strange behavior when NS interrupts are routed to EL3 as FIQs (due to EHF), but before I dig into it further I wanted to confirm if EHF + OP-TEE is a valid combination. Some background: Our system, which uses OP-TEE, has some "aggregated interrupts" that contain both secure and non-secure sources, for which we wanted to use SDEI to filter and dispatch to Linux (and SDEI requires EHF). Thanks! -Brian

1 year, 12 months

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Console getc() callback

by Sandrine Bailleux

Hi everyone, As you may know, console drivers in TF-A are required to provide a number of callbacks. One of them is getc() (to read a character from the console). Even though most platform ports provide a valid implementation of it, it does not seem to be called anywhere in the code base today, effectively qualifying it as dead code. I did a bit of git history digging and from what I've seen, the very first public version of TF-A (v0.2!) already had a getc() callback in the Arm PL011 UART driver. So my guess is that all subsequent UART drivers added after that followed the same approach. When the multi-console framework was introduced, it naturally catered for this feature as well. However, taking a step back, I wonder why we introduced getc() in the first place... Unlike other firmwares (like U-boot or EDK2), TF-A does not implement any kind of interactive user shell. And from a security point of view, getc() constitutes an attack vector into TF-A, which might allow an attacker to inject arbitrary data. So keeping this functionality without any valid use case sounds like a bad idea to me. Now, even though getc() is not used in upstream TF-A code right now, I realize there might be downstream / internal test setups which need it. For example, for firmware recovery purposes (receiving a backup firmware over a serial interface) or automated tests setups (some script driving a test session using some communication protocol over a serial interface). Is anyone depending on such use cases? If not, then I suggest we consider removing getc() feature altogether. We could always bring it back when there is a real use case for it (it will survive through git history). At the very least, I would like to disable getc() by default. Enabling it would require setting a build flag. Any thoughts or concerns? Best regards, Sandrine

1 year, 12 months

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Convert fiptool to Python script

by Varun Wadekar

Hello, We use fiptool extensively to generate the FIP blobs for NVIDIA platforms. But, we encountered the following issues during deployment. 1. fiptool has a dependency on the host machine for OpenSSL and gcc. 2. fiptool resides under the TF-A repo and is used by Hafnium and SPs. This creates a cross-repository dependency. As a workaround, we ship a prebuilt fiptool. But, due to OS dependency, this approach is not scalable across OS versions. E.g. One OS distribution might be using a lower OpenSSL version compared another, creating an incompatibility. I was thinking if converting fiptool to a python script might help resolve these issues. Sptool was converted into a Python script, so was wondering if anyone has tried converting fiptool to a Python script too. -Varun

2 years

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