- TF-A - lists.trustedfirmware.org

Problems building for qemu with SPM (S-EL2) support

by Rebecca Cran

I'm having problems building TF-A with SPM/S-EL2 support. I can build with PLAT=fvp fine, but building with PLAT=qemu results in the error: LD /home/rebecca/src/arm-trusted-firmware/build/qemu/release/bl31/bl31.elf /home/rebecca/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-ld: /home/rebecca/src/arm-trusted-firmware/build/qemu/release/bl31/spmd_main.o: in function `spmd_setup': spmd_main.c:(.text.spmd_setup+0x74): undefined reference to `plat_spm_core_manifest_load' spmd_main.c:(.text.spmd_setup+0x74): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `plat_spm_core_manifest_load' make: *** [Makefile:1136: /home/rebecca/src/arm-trusted-firmware/build/qemu/release/bl31/bl31.elf] Error 1 The command line I'm using is: make PLAT=qemu DEBUG=0 \ CROSS_COMPILE=~/gcc-arm-10.2-2020.11-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu- \ SPD=spmd CTX_INCLUDE_EL2_REGS=1 BL32=bl32.bin BL33=bl33.bin \ SP_LAYOUT_FILE=sp_layout.json ARM_ARCH_MINOR=4 all fip Adding the following files to BL31_SOURCES in plat/qemu/platform.mk resolves the problem, but I suspect that's not the correct solution? plat/common/plat_spmd_manifest.c common/fdt_wrappers.c -- Rebecca Cran

4 years

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Re: [TF-A] Debugging a lock-up in opteed_system_reset

by Jens Wiklander

Hi Jan, On Sat, Apr 10, 2021 at 1:18 PM Jan Kiszka via TF-A <tf-a(a)lists.trustedfirmware.org> wrote: > > On 09.04.21 14:56, Jan Kiszka wrote: > > Hi all, > > > > I'm currently debugging sporadic lockups in TF-A when calling the system > > reset hook of OP-TEE: opteed_system_reset() gets stuck on > > opteed_synchronous_sp_entry(), and the thread_system_reset_handler of > > OP-TEE is not invoked (I left a debug output on the OP-TEE side). > > Platform is k3, target hardware our IOT2050 device. I was using today's > > master of TF-A and OP-TEE, but also older versions of both. > > > > What could cause this? I would assume that TF-A and OP-TEE are protected > > against overwriting of the non-secure world and we would see exceptions > > in case some reservation is not properly set, possibly misleading Linux. > > > > Turned out that we had a bug in our device tree: "reserved_memory", > rather than "reserved-memory". That caused Linux to ignore the RAM > reservation, eventually accessing the memory that OP-TEE is using. > > But that still does not explain why the secured memory is left behind > unsecured. Who is responsible for that, TF-A or the TEE itself? This might be memory reserved for the static shared memory pool used when communicating between Linux normal world and OP-TEE in secure world. If that's the case it's normal that the memory is accessible from Linux, however if Linux uses it for other purposes too there will be memory corruptions. Cheers, Jens

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Re: [TF-A] Proposal: TF-A to adopt hand-off blocks (HOBs) for information passing between boot stages

by Manish Pandey2

Hi, From TF-A project point of view, we prefer to use existing mechanism to pass parameters across boot stages using linked list of tagged elements (as suggested by Julius). It has support for both generic and SiP-specific tags. Having said that, it does not stop partners to introduce new mechanisms suitable for their usecase in platform port initially and later move to generic code if its suitable for other platforms. To start with, Ampere can introduce a platform specific implementation of memory tag(speed/NUMA topology etc) which can be evaluated and discussed for generalization in future. The tag will be populated in BL2 stage and can be forwarded to further stages(and to BL33) by passing the head of list pointer in one of the registers. Initially any register can be used but going forward a standardization will be needed. The U-boot bloblist mentioned by Simon is conceptually similar to what TF-A is using, if there is consensus of using bloblist/taglist then TF-A tag list may be enhanced to take best of both the implementations. One of the potential problems of having structure used in different projects is maintainability, this can be avoided by having a single copy of these structures in TF-A (kept inside "include/export" which intended to be used by other projects.) Regarding usage of either UUID or tag, I echo the sentiments of Simon and Julius to keep it simple and use tag values. Looking forward to having further discussions on zoom call today. Thanks Manish P ________________________________ From: TF-A <tf-a-bounces(a)lists.trustedfirmware.org> on behalf of Julius Werner via TF-A <tf-a(a)lists.trustedfirmware.org> Sent: 25 March 2021 02:43 To: Simon Glass <sjg(a)chromium.org> Cc: Harb Abdulhamid OS <abdulhamid(a)os.amperecomputing.com>; Boot Architecture Mailman List <boot-architecture(a)lists.linaro.org>; tf-a(a)lists.trustedfirmware.org <tf-a(a)lists.trustedfirmware.org>; U-Boot Mailing List <u-boot(a)lists.denx.de>; Paul Isaac's <paul.isaacs(a)linaro.org>; Ron Minnich <rminnich(a)google.com> Subject: Re: [TF-A] Proposal: TF-A to adopt hand-off blocks (HOBs) for information passing between boot stages Just want to point out that TF-A currently already supports a (very simple) mechanism like this: https://review.trustedfirmware.org/plugins/gitiles/TF-A/trusted-firmware-a/… https://review.trustedfirmware.org/plugins/gitiles/TF-A/trusted-firmware-a/… https://review.trustedfirmware.org/plugins/gitiles/TF-A/trusted-firmware-a/… It's just a linked list of tagged elements. The tag space is split into TF-A-wide generic tags and SiP-specific tags (with plenty of room to spare if more areas need to be defined -- a 64-bit tag can fit a lot). This is currently being used by some platforms that run coreboot in place of BL1/BL2, to pass information from coreboot (BL2) to BL31. I would echo Simon's sentiment of keeping this as simple as possible and avoiding complicated and bloated data structures with UUIDs. You usually want to parse something like this as early as possible in the passed-to firmware stage, particularly if the structure encodes information about the debug console (like it does for the platforms I mentioned above). For example, in BL31 this basically means doing it right after moving from assembly to C in bl31_early_platform_setup2() to get the console up before running anything else. At that point in the BL31 initialization, the MMU and caches are disabled, so data accesses are pretty expensive and you don't want to spend a lot of parsing effort or calculate complicated checksums or the like. You just want something extremely simple where you ideally have to touch every data word only once. On Wed, Mar 24, 2021 at 5:06 PM Simon Glass via TF-A <tf-a(a)lists.trustedfirmware.org<mailto:tf-a@lists.trustedfirmware.org>> wrote: Hi Harb, On Wed, 24 Mar 2021 at 11:39, Harb Abdulhamid OS <abdulhamid(a)os.amperecomputing.com<mailto:abdulhamid@os.amperecomputing.com>> wrote: Hello Folks, Appreciate the feedback and replies on this. Glad to see that there is interest in this topic. 😊 I try to address the comments/feedback from Francois and Simon below…. @François Ozog<mailto:francois.ozog@linaro.org> – happy to discuss this on a zoom call. I will make that time slot work, and will be available to attend April 8, 4pm CT. Note that I’m using the term “HOB” here more generically, as there are typically vendor specific structures beyond the resource descriptor HOB, which provides only a small subset of the information that needs to be passed between the boot phases. The whole point here is to provide mechanism to develop firmware that we can build ARM Server SoC’s that support *any* BL33 payload (e.g. EDK2, AptioV, CoreBoot, and maybe even directly boot strapping LinuxBoot at some point). In other-words, we are trying to come up with a TF-A that would be completely agnostic to the implementation of BL33 (i.e. BL33 is built completely independently by a separate entity – e.g. an ODM/OEM). Keep in mind, in the server/datacenter market segment we are not building vertically integrated systems with a single entity compiling firmware/software stacks like most folks in TF-A have become use to. There are two categories of higher level firmware code blobs in the server/datacenter model: 1. “SoC” or “silicon” firmware – in TF-A this may map to BL1, BL2, BL31, and *possibly* one or more BL32 instances 2. “Platform” or “board” firmware – in TF-A this may map to BL33 and *possibly* one or more BL32 instances. Even the platform firmware stack could be further fragmented by having multiple entities involved in delivering the entire firmware stack: IBVs, ODMs, OEMs, CSPs, and possibly even device vendor code. To support a broad range of platform designs with a broad range of memory devices, we need a crisp and clear contract between the SoC firmware that initializes memory (e.g. BL2) and how that platform boot firmware (e.g. BL33) gathers information about what memory that was initialized, at what speeds, NUMA topology, and many other relevant information that needs to be known and comprehended by the platform firmware and eventually by the platform software. I understand the versatility of DT, but I see two major problems with DT: * DT requires more complicated parsing to get properties, and even more complex to dynamically set properties – this HOB structures may need to be generated in boot phases where DDR is not available, and therefore we will be extremely memory constrained. * DT is probably overkill for this purpose – We really just want a list of pointers to simple C structures that code cast (e.g. JEDEC SPD data blob) I think that we should not mix the efforts around DT/ACPI specs with what we are doing here, because those specs and concepts were developed for a completely different purpose (i.e. abstractions needed for OS / RTOS software, and not necessarily suitable for firmware-to-firmware hand-offs). Frankly, I would personally push back pretty hard on defining SMC’s for something that should be one way information passing. Every SMC we add is another attack vector to the secure world and an increased burden on the folks that have to do security auditing and threat analysis. I see no benefit in exposing these boot/HOB/BOB structures at run-time via SMC calls. Please do let me know if you disagree and why. Look forward to discussing on this thread or on the call. @Simon Glass<mailto:sjg@chromium.org> - Thanks for the pointer to bloblist. I briefly reviewed and it seems like a good baseline for what we may be looking for. That being said, I would say that there is some benefit in having some kind of unique identifiers (e.g. UUID or some unique signature) so that we can tie standardized data structures (based on some future TBD specs) to a particular ID. For example, if the TPM driver in BL33 is looking for the TPM structure in the HOB/BOB list, and may not care about the other data blobs. The driver needs a way to identify and locate the blob it cares about. The tag is intended to serve that purpose, although perhaps it should switch from an auto-allocating enum to one with explicit values for each entry and a range for 'local' use. I guess we can achieve this with the tag, but the problem with tag when you have eco-system with a lot of parties doing parallel development, you can end up with tag collisions and folks fighting about who has rights to what tag values. We would need some official process for folks to register tags for whatever new structures we define, or maybe some tag range for vendor specific structures. This comes with a lot of pain and bureaucracy. On the other hand, UUID has been a proven way to make it easy to just define your own blobs with *either* standard or vendor specific structures without worry of ID collisions between vendors. True. I think the pain is overstated, though. In this case I think we actually want something that can be shared between projects and orgs, so some amount of coordination could be considered a benefit. It could just be a github pull request. I find the UUID unfriendly and not just to code size and eyesight! Trying to discover what GUIDs mean or are valid is quite tricky. E.g. see this code: #define FSP_HOB_RESOURCE_OWNER_TSEG_GUID \ EFI_GUID(0xd038747c, 0xd00c, 0x4980, \ 0xb3, 0x19, 0x49, 0x01, 0x99, 0xa4, 0x7d, 0x55) (etc.) static struct guid_name { efi_guid_t guid; const char *name; } guid_name[] = { { FSP_HOB_RESOURCE_OWNER_TSEG_GUID, "TSEG" }, { FSP_HOB_RESOURCE_OWNER_FSP_GUID, "FSP" }, { FSP_HOB_RESOURCE_OWNER_SMM_PEI_SMRAM_GUID, "SMM PEI SMRAM" }, { FSP_NON_VOLATILE_STORAGE_HOB_GUID, "NVS" }, { FSP_VARIABLE_NV_DATA_HOB_GUID, "Variable NVS" }, { FSP_GRAPHICS_INFO_HOB_GUID, "Graphics info" }, { FSP_HOB_RESOURCE_OWNER_PCD_DATABASE_GUID1, "PCD database ea" }, { FSP_HOB_RESOURCE_OWNER_PCD_DATABASE_GUID2, "PCD database 9b" }, (never figured out what those two are) { FSP_HOB_RESOURCE_OWNER_PEIM_DXE_GUID, "PEIM Init DXE" }, { FSP_HOB_RESOURCE_OWNER_ALLOC_STACK_GUID, "Alloc stack" }, { FSP_HOB_RESOURCE_OWNER_SMBIOS_MEMORY_GUID, "SMBIOS memory" }, { {}, "zero-guid" }, {} }; static const char *guid_to_name(const efi_guid_t *guid) { struct guid_name *entry; for (entry = guid_name; entry->name; entry++) { if (!guidcmp(guid, &entry->guid)) return entry->name; } return NULL; } Believe it or not it took a fair bit of effort to find just that small list, with nearly every one in a separate doc, from memory. We can probably debate whether there is any value in GUID/UUID or not during the call… but again, boblist seems like a reasonable starting point as an alternative to HOB. Indeed. There is certainly value in both approaches. Regards, Simon Thanks, --Harb From: François Ozog <francois.ozog(a)linaro.org<mailto:francois.ozog@linaro.org>> Sent: Tuesday, March 23, 2021 10:00 AM To: François Ozog <francois.ozog(a)linaro.org<mailto:francois.ozog@linaro.org>>; Ron Minnich <rminnich(a)google.com<mailto:rminnich@google.com>>; Paul Isaac's <paul.isaacs(a)linaro.org<mailto:paul.isaacs@linaro.org>> Cc: Simon Glass <sjg(a)chromium.org<mailto:sjg@chromium.org>>; Harb Abdulhamid OS <abdulhamid(a)os.amperecomputing.com<mailto:abdulhamid@os.amperecomputing.com>>; Boot Architecture Mailman List <boot-architecture(a)lists.linaro.org<mailto:boot-architecture@lists.linaro.org>>; tf-a(a)lists.trustedfirmware.org<mailto:tf-a@lists.trustedfirmware.org> Subject: Re: [TF-A] Proposal: TF-A to adopt hand-off blocks (HOBs) for information passing between boot stages +Ron Minnich<mailto:rminnich@google.com> +Paul Isaac's<mailto:paul.isaacs@linaro.org> Adding Ron and Paul because I think this interface should be also benefiting LinuxBoot efforts. On Tue, 23 Mar 2021 at 11:17, François Ozog via TF-A <tf-a(a)lists.trustedfirmware.org<mailto:tf-a@lists.trustedfirmware.org>> wrote: Hi, I propose we cover the topic at the next Trusted Substrate<https://collaborate.linaro.org/display/TS/Trusted+Substrate+Home> zoom call<https://linaro-org.zoom.us/j/94563644892> on April 8th 4pm CET. The agenda: ABI between non-secure firmware and the rest of firmware (EL3, S-EL1, S-EL2, SCP) to adapt hardware description to some runtime conditions. runtime conditions here relates to DRAM size and topology detection, secure DRAM memory carvings, PSCI and SCMI interface publishing. For additional background on existing metadata: UEFI Platform Initialization Specification Version 1.7<https://uefi.org/sites/default/files/resources/PI_Spec_1_7_final_Jan_2019.p…>, 5.5 Resource Descriptor HOB Out of the ResourceType we care about is EFI_RESOURCE_SYSTEM_MEMORY. This HOB lacks memory NUMA attachment or something that could be related to fill SRAT table for ACPI or relevant DT proximity domains. HOB is not consistent accros platforms: some platforms (Arm) lists memory from the booting NUMA node, other platforms (x86) lists all memory from all NUMA nodes. (At least this is the case on the two platforms I tested). There are two proposals to use memory structures from SPL/BLx up to the handover function (as defined in the Device Tree technical report<https://docs.google.com/document/d/1CLkhLRaz_zcCq44DLGmPZQFPbYHOC6nzPowaL0X…>) which can be U-boot (BL33 or just U-Boot in case of SPL/U-Boot scheme) or EDK2. I would propose we also discuss possibility of FF-A interface to actually query information or request actions to be done (this is a model actually used in some SoCs with proprietary SMC calls). Requirements (to be validated): - ACPI and DT hardware descriptions. - agnostic to boot framework (SPL/U-Boot, TF-A/U-Boot, TF-A/EDK2) - agnostic to boot framework (SPL/U-Boot, TF-A/U-Boot, TF-A/EDK2, TF-A/LinuxBoot) - at least allows complete DRAM description and "persistent" usage (reserved areas for secure world or other usages) - support secure world device assignment Cheers FF On Mon, 22 Mar 2021 at 19:56, Simon Glass <sjg(a)chromium.org<mailto:sjg@chromium.org>> wrote: Hi, Can I suggest using bloblist for this instead? It is lightweight, easier to parse, doesn't have GUIDs and is already used within U-Boot for passing info between SPL/U-Boot, etc. Docs here: https://github.com/u-boot/u-boot/blob/master/doc/README.bloblist Header file describes the format: https://github.com/u-boot/u-boot/blob/master/include/bloblist.h Full set of unit tests: https://github.com/u-boot/u-boot/blob/master/test/bloblist.c Regards, Simon On Mon, 22 Mar 2021 at 23:58, François Ozog <francois.ozog(a)linaro.org<mailto:francois.ozog@linaro.org>> wrote: > > +Boot Architecture Mailman List <boot-architecture(a)lists.linaro.org<mailto:boot-architecture@lists.linaro.org>> > > standardization is very much welcomed here and need to accommodate a very > diverse set of situations. > For example, TEE OS may need to pass memory reservations to BL33 or > "capture" a device for the secure world. > > I have observed a number of architectures: > 1) pass information from BLx to BLy in the form of a specific object > 2) BLx called by BLy by a platform specific SMC to get information > 3) BLx called by BLy by a platform specific SMC to perform Device Tree > fixups > > I also imagined a standardized "broadcast" FF-A call so that any firmware > element can either provide information or "do something". > > My understanding of your proposal is about standardizing on architecture 1) > with the HOB format. > > The advantage of the HOB is simplicity but it may be difficult to implement > schemes such as pruning a DT because device assignment in the secure world. > > In any case, it looks feasible to have TF-A and OP-TEE complement the list > of HOBs to pass information downstream (the bootflow). > > It would be good to start with building the comprehensive list of > information that need to be conveyed between firmware elements: > > information. | authoritative entity | reporting entity | information > exchanged: > dram | TFA | TFA | > <format to be detailed, NUMA topology to build the SRAT table or DT > equivalent?> > PSCI | SCP | TFA? | > SCMI | SCP or TEE-OS | TFA? TEE-OS?| > secure SRAM | TFA. | TFA. | > secure DRAM | TFA? TEE-OS? | TFA? TEE-OS? | > other? | | > | > > Cheers > > FF > > > On Mon, 22 Mar 2021 at 09:34, Harb Abdulhamid OS via TF-A < > tf-a(a)lists.trustedfirmware.org<mailto:tf-a@lists.trustedfirmware.org>> wrote: > > > Hello Folks, > > > > > > > > I'm emailing to start an open discussion about the adoption of a concept > > known as "hand-off blocks" or HOB to become a part of the TF-A Firmware > > Framework Architecture (FFA). This is something that is a pretty major > > pain point when it comes to the adoption of TF-A in ARM Server SoC’s > > designed to enable a broad range of highly configurable datacenter > > platforms. > > > > > > > > > > > > What is a HOB (Background)? > > > > --------------------------- > > > > UEFI PI spec describes a particular definition for how HOB may be used for > > transitioning between the PEI and DXE boot phases, which is a good > > reference point for this discussion, but not necessarily the exact solution > > appropriate for TF-A. > > > > > > > > A HOB is simply a dynamically generated data structure passed in between > > two boot phases. This is information that was obtained through discovery > > and needs to be passed forward to the next boot phase *once*, with no API > > needed to call back (e.g. no call back into previous firmware phase is > > needed to fetch this information at run-time - it is simply passed one time > > during boot). > > > > > > > > There may be one or more HOBs passed in between boot phases. If there are > > more than one HOB that needs to be passed, this can be in a form of a "HOB > > table", which (for example) could be a UUID indexed array of pointers to > > HOB structures, used to locate a HOB of interest (based on UUID). In such > > cases, instead of passing a single HOB, the boot phases may rely on passing > > the pointer to the HOB table. > > > > > > > > This has been extremely useful concept to employ on highly configurable > > systems that must rely on flexible discovery mechanisms to initialize and > > boot the system. This is especially helpful when you have multiple > > > > > > > > > > > > Why do we need HOBs in TF-A?: > > > > ----------------------------- > > > > It is desirable that EL3 firmware (e.g. TF-A) built for ARM Server SoC in > > a way that is SoC specific *but* platform agnostic. This means that a > > single ARM SoC that a SiP may deliver to customers may provide a single > > TF-A binary (e.g. BL1, BL2, BL31) that could be used to support a broad > > range of platform designs and configurations in order to boot a platform > > specific firmware (e.g. BL33 and possibly even BL32 code). In order to > > achieve this, the platform configuration must be *discovered* instead of > > statically compiled as it is today in TF-A via device tree based > > enumeration. The mechanisms of discovery may differ broadly depending on > > the relevant industry standard, or in some cases may have rely on SiP > > specific discovery flows. > > > > > > > > For example: On server systems that support a broad range DIMM memory > > population/topologies, all the necessary information required to boot is > > fully discovered via standard JEDEC Serial Presence Detect (SPD) over an > > I2C bus. Leveraging the SPD bus, may platform variants could be supported > > with a single TF-A binary. Not only is this information required to > > initialize memory in early boot phases (e.g. BL2), the subsequent boot > > phases will also need this SPD info to construct a system physical address > > map and properly initialize the MMU based on the memory present, and where > > the memory may be present. Subsequent boot phases (e.g. BL33 / UEFI) may > > need to generate standard firmware tables to the operating systems, such as > > SMBIOS tables describing DIMM topology and various ACPI tables (e.g. SLIT, > > SRAT, even NFIT if NVDIMM's are present). > > > > > > > > In short, it all starts with a standardized or vendor specific discovery > > flow in an early boot stage (e.g. BL1/BL2), followed by the passing of > > information to the next boot stages (e.g. BL31/BL32/BL33). > > > > > > > > Today, every HOB may be a vendor specific structure, but in the future > > there may be benefit of defining standard HOBs. This may be useful for > > memory discovery, passing the system physical address map, enabling TPM > > measured boot, and potentially many other common HOB use-cases. > > > > > > > > It would be extremely beneficial to the datacenter market segment if the > > TF-A community would adopt this concept of information passing between all > > boot phases as opposed to rely solely on device tree enumeration. This is > > not intended to replace device tree, rather intended as an alternative way > > to describe the info that must be discovered and dynamically generated. > > > > > > > > > > > > Conclusion: > > > > ----------- > > > > We are proposing that the TF-A community begin pursuing the adoption of > > HOBs as a mechanism used for information exchange between each boot stage > > (e.g. BL1->BL2, BL2->BL31, BL31->BL32, and BL31->BL33)? Longer term we > > want to explore standardizing some HOB structures for the BL33 phase (e.g. > > UEFI HOB structures), but initially would like to agree on this being a > > useful mechanism used to pass information between each boot stage. > > > > > > > > Thanks, > > > > --Harb > > > > > > > > > > > > > > -- > > TF-A mailing list > > TF-A(a)lists.trustedfirmware.org<mailto:TF-A@lists.trustedfirmware.org> > > https://lists.trustedfirmware.org/mailman/listinfo/tf-a > > > > > -- > François-Frédéric Ozog | *Director Linaro Edge & Fog Computing Group* > T: +33.67221.6485 > francois.ozog(a)linaro.org<mailto:francois.ozog@linaro.org> | Skype: ffozog > _______________________________________________ > boot-architecture mailing list > boot-architecture(a)lists.linaro.org<mailto:boot-architecture@lists.linaro.org> > https://lists.linaro.org/mailman/listinfo/boot-architecture -- [https://drive.google.com/a/linaro.org/uc?id=0BxTAygkus3RgQVhuNHMwUi1mYWc&ex…] François-Frédéric Ozog | Director Linaro Edge & Fog Computing Group T: +33.67221.6485 francois.ozog(a)linaro.org<mailto:francois.ozog@linaro.org> | Skype: ffozog -- TF-A mailing list TF-A(a)lists.trustedfirmware.org<mailto:TF-A@lists.trustedfirmware.org> https://lists.trustedfirmware.org/mailman/listinfo/tf-a -- [https://drive.google.com/a/linaro.org/uc?id=0BxTAygkus3RgQVhuNHMwUi1mYWc&ex…] François-Frédéric Ozog | Director Linaro Edge & Fog Computing Group T: +33.67221.6485 francois.ozog(a)linaro.org<mailto:francois.ozog@linaro.org> | Skype: ffozog -- TF-A mailing list TF-A(a)lists.trustedfirmware.org<mailto:TF-A@lists.trustedfirmware.org> https://lists.trustedfirmware.org/mailman/listinfo/tf-a

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Debugging a lock-up in opteed_system_reset

by Jan Kiszka

Hi all, I'm currently debugging sporadic lockups in TF-A when calling the system reset hook of OP-TEE: opteed_system_reset() gets stuck on opteed_synchronous_sp_entry(), and the thread_system_reset_handler of OP-TEE is not invoked (I left a debug output on the OP-TEE side). Platform is k3, target hardware our IOT2050 device. I was using today's master of TF-A and OP-TEE, but also older versions of both. What could cause this? I would assume that TF-A and OP-TEE are protected against overwriting of the non-secure world and we would see exceptions in case some reservation is not properly set, possibly misleading Linux. Jan -- Siemens AG, T RDA IOT Corporate Competence Center Embedded Linux

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TF-A 2.5 Release: Code-Freeze 30th April

by Gary Morrison

Hi, This is to notify that we are planning to target the Trusted Firmware-A 2.5 release during the second week of May 2021 as part of the regular ~6-month cadence. The aim is to consolidate all TF-A work since the 2.4 release. As part of this, a release candidate tag will be created and release activities will commence after the 30th of April. Essentially we will not merge any major enhancements from this date until the release is made. Please ensure any Gerrit Patch Reviews desired to make the 2.5 release are submitted in good time to be complete by last week of Apr 2021. Any major enhancement Gerrit Patch Reviews still open after that date will not be merged until after the release.

4 years

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OpenCI and trusted-firmware-ci organization in github

by Joanna Farley

Hi Everyone, If you get an invite to join the trusted-firmware-ci organization in Github it’s to allow all the project contributors seeded from the TF-A maintainers file (maintainers and code owners) to have the privileges to be able to perform Jenkin job rebuilds from the OpenCI Jenkins pages for the TF-A project. All the TF-A project maintainers will have the admin ability to add new people. Thanks Joanna

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TF-A Tech Forum Agenda @ Thr 8th April 2021 16:00-1700 BST

by Joanna Farley

Hi All, The next TF-A Tech Forum is scheduled for Thu 8th April 2021 16:00 – 17:00 (BST). Agenda: * TF-A OpenCI Update and Q&A * Lead by Joanna Farley * Following the posting in late March https://lists.trustedfirmware.org/pipermail/tf-a/2021-March/001045.html announcing the availability of the OpenCI this session is an update on the status and a run through of what’s available in the OpenCI to project contributors. I will have representatives from the OpenCI infrastructure team from Linaro along side TF-A project members familiar with the TF-A CI testing on the call to help answer any questions. * Attached is an early draft of the OpenCI documentation with Version 1.0 expected soon. Thanks Joanna

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Trusted Substrate architecture call: HandOverBlocks discussion

by François Ozog

Hi following a mail discussion on trusted-firmware A we will have a discussion on HOBs during this week's Trusted Substrate <http://trusted-substrate.org>architecture council call <https://linaro-org.zoom.us/j/94563644892>. In addition to mail thread, here is a deck <https://docs.google.com/presentation/d/1KyqkyqoGXHUynZSI2hRFBoO_P7sFwgUJWhj…> I'll use to start things up. Cheers FF -- François-Frédéric Ozog | *Director Linaro Edge & Fog Computing Group* T: +33.67221.6485 francois.ozog(a)linaro.org | Skype: ffozog

4 years

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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. 12 new defect(s) introduced to ARM-software/arm-trusted-firmware found with Coverity Scan. New defect(s) Reported-by: Coverity Scan Showing 12 of 12 defect(s) ** CID 369886: Uninitialized variables (UNINIT) /drivers/nxp/flexspi/nor/fspi.c: 130 in fspi_op_setup() ________________________________________________________________________________________________________ *** CID 369886: Uninitialized variables (UNINIT) /drivers/nxp/flexspi/nor/fspi.c: 130 in fspi_op_setup() 124 cmd_id2 = FSPI_NOR_CMD_RDSR; 125 break; 126 } 127 128 x_addr = FSPI_LUTREG_OFFSET + (uint32_t)(0x10 * fspi_op_seq_id); 129 if ((F_FLASH_SIZE_BYTES <= SZ_16M_BYTES) || (ignore_flash_sz)) { >>> CID 369886: Uninitialized variables (UNINIT) >>> Using uninitialized value "cmd_id1". 130 x_instr0 = FSPI_INSTR_OPRND0(cmd_id1); 131 x_instr1 = FSPI_INSTR_OPRND1(FSPI_LUT_ADDR24BIT); 132 VERBOSE("CMD_ID = %x offset = 0x%x\n", cmd_id1, x_addr); 133 } else { 134 x_instr0 = FSPI_INSTR_OPRND0(cmd_id2); 135 x_instr1 = FSPI_INSTR_OPRND1(FSPI_LUT_ADDR32BIT); ** CID 369885: Memory - corruptions (ARRAY_VS_SINGLETON) ________________________________________________________________________________________________________ *** CID 369885: Memory - corruptions (ARRAY_VS_SINGLETON) /plat/nxp/common/nv_storage/plat_nv_storage.c: 64 in read_nv_app_data() 58 if (ret != XSPI_SUCCESS) { 59 ERROR("Failed to initialized driver flexspi-nor.\n"); 60 ERROR("exiting warm-reset request.\n"); 61 return -ENODEV; 62 } 63 >>> CID 369885: Memory - corruptions (ARRAY_VS_SINGLETON) >>> Passing "(uint32_t *)&nv_app_data" to function "xspi_read" which uses it as an array. This might corrupt or misinterpret adjacent memory locations. 64 xspi_read(nv_base_addr, 65 (uint32_t *)&nv_app_data, sizeof(nv_app_data_t)); 66 xspi_sector_erase((uint32_t) nv_base_addr, 67 F_SECTOR_ERASE_SZ); 68 #endif 69 return ret; ** CID 369884: Memory - corruptions (ARRAY_VS_SINGLETON) ________________________________________________________________________________________________________ *** CID 369884: Memory - corruptions (ARRAY_VS_SINGLETON) /drivers/brcm/i2c/i2c.c: 669 in i2c_send_byte() 663 struct iproc_xact_info info; 664 665 iproc_i2c_fill_info(&info, bus_id, devaddr, 0U, &value, 666 SMBUS_PROT_SEND_BYTE, 0U); 667 668 /* Refer to i2c_smbus_write_byte params passed. */ >>> CID 369884: Memory - corruptions (ARRAY_VS_SINGLETON) >>> Passing "info.data" via argument "&info" to function "iproc_i2c_data_send" which uses it as an array. This might corrupt or misinterpret adjacent memory locations. 669 rc = iproc_i2c_data_send(&info); 670 671 if (rc < 0) { 672 ERROR("%s: %s error accessing device 0x%x\n", 673 __func__, "Write", devaddr); 674 } ** CID 369883: Memory - illegal accesses (UNINIT) ________________________________________________________________________________________________________ *** CID 369883: Memory - illegal accesses (UNINIT) /drivers/nxp/crypto/caam/src/caam.c: 142 in configure_jr() 136 return -1; 137 } 138 139 start_jr(num); 140 141 /* Do HW configuration of the JR */ >>> CID 369883: Memory - illegal accesses (UNINIT) >>> Using uninitialized value "reg_base_addr" when calling "init_job_ring". 142 job_ring = init_job_ring(SEC_NOTIFICATION_TYPE_POLL, 0, 0, 143 reg_base_addr, 0); 144 145 if (job_ring == NULL) { 146 ERROR("Error in init_job_ring"); 147 return -1; ** CID 369882: (BAD_SHIFT) /drivers/nxp/ddr/phy-gen2/phy.c: 2320 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2338 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2308 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2347 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2334 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2329 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2312 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2351 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2298 in parse_odt() /drivers/nxp/ddr/phy-gen2/phy.c: 2316 in parse_odt() ________________________________________________________________________________________________________ *** CID 369882: (BAD_SHIFT) /drivers/nxp/ddr/phy-gen2/phy.c: 2320 in parse_odt() 2314 case DDR_ODT_OTHER_DIMM: 2315 for (j = 0; j < DDRC_NUM_CS; j++) { 2316 if ((((cs_d0 & (1 << i)) != 0) && 2317 ((cs_d1 & (1 << j)) != 0)) || 2318 (((cs_d1 & (1 << i)) != 0) && 2319 ((cs_d0 & (1 << j)) != 0))) { >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2320 odt[j] |= (1 << i) << shift; 2321 } 2322 } 2323 break; 2324 case DDR_ODT_ALL: 2325 for (j = 0; j < DDRC_NUM_CS; j++) { /drivers/nxp/ddr/phy-gen2/phy.c: 2338 in parse_odt() 2332 case DDR_ODT_SAME_DIMM: 2333 for (j = 0; j < DDRC_NUM_CS; j++) { 2334 if ((((cs_d0 & (1 << i)) != 0) && 2335 ((cs_d0 & (1 << j)) != 0)) || 2336 (((cs_d1 & (1 << i)) != 0) && 2337 ((cs_d1 & (1 << j)) != 0))) { >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2338 odt[j] |= (1 << i) << shift; 2339 } 2340 } 2341 break; 2342 case DDR_ODT_OTHER_CS_ONSAMEDIMM: 2343 for (j = 0; j < DDRC_NUM_CS; j++) { /drivers/nxp/ddr/phy-gen2/phy.c: 2308 in parse_odt() 2302 if (i == j) { 2303 continue; 2304 } 2305 if (((cs_d0 | cs_d1) & (1 << j)) == 0) { 2306 continue; 2307 } >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2308 odt[j] |= (1 << i) << shift; 2309 } 2310 break; 2311 case DDR_ODT_CS_AND_OTHER_DIMM: 2312 odt[i] |= (1 << i) << 4; 2313 /* fallthrough */ /drivers/nxp/ddr/phy-gen2/phy.c: 2347 in parse_odt() 2341 break; 2342 case DDR_ODT_OTHER_CS_ONSAMEDIMM: 2343 for (j = 0; j < DDRC_NUM_CS; j++) { 2344 if (i == j) { 2345 continue; 2346 } >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2347 if ((((cs_d0 & (1 << i)) != 0) && 2348 ((cs_d0 & (1 << j)) != 0)) || 2349 (((cs_d1 & (1 << i)) != 0) && 2350 ((cs_d1 & (1 << j)) != 0))) { 2351 odt[j] |= (1 << i) << shift; 2352 } /drivers/nxp/ddr/phy-gen2/phy.c: 2334 in parse_odt() 2328 } 2329 odt[j] |= (1 << i) << shift; 2330 } 2331 break; 2332 case DDR_ODT_SAME_DIMM: 2333 for (j = 0; j < DDRC_NUM_CS; j++) { >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2334 if ((((cs_d0 & (1 << i)) != 0) && 2335 ((cs_d0 & (1 << j)) != 0)) || 2336 (((cs_d1 & (1 << i)) != 0) && 2337 ((cs_d1 & (1 << j)) != 0))) { 2338 odt[j] |= (1 << i) << shift; 2339 } /drivers/nxp/ddr/phy-gen2/phy.c: 2329 in parse_odt() 2323 break; 2324 case DDR_ODT_ALL: 2325 for (j = 0; j < DDRC_NUM_CS; j++) { 2326 if (((cs_d0 | cs_d1) & (1 << j)) == 0) { 2327 continue; 2328 } >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2329 odt[j] |= (1 << i) << shift; 2330 } 2331 break; 2332 case DDR_ODT_SAME_DIMM: 2333 for (j = 0; j < DDRC_NUM_CS; j++) { 2334 if ((((cs_d0 & (1 << i)) != 0) && /drivers/nxp/ddr/phy-gen2/phy.c: 2312 in parse_odt() 2306 continue; 2307 } 2308 odt[j] |= (1 << i) << shift; 2309 } 2310 break; 2311 case DDR_ODT_CS_AND_OTHER_DIMM: >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2312 odt[i] |= (1 << i) << 4; 2313 /* fallthrough */ 2314 case DDR_ODT_OTHER_DIMM: 2315 for (j = 0; j < DDRC_NUM_CS; j++) { 2316 if ((((cs_d0 & (1 << i)) != 0) && 2317 ((cs_d1 & (1 << j)) != 0)) || /drivers/nxp/ddr/phy-gen2/phy.c: 2351 in parse_odt() 2345 continue; 2346 } 2347 if ((((cs_d0 & (1 << i)) != 0) && 2348 ((cs_d0 & (1 << j)) != 0)) || 2349 (((cs_d1 & (1 << i)) != 0) && 2350 ((cs_d1 & (1 << j)) != 0))) { >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2351 odt[j] |= (1 << i) << shift; 2352 } 2353 } 2354 break; 2355 case DDR_ODT_NEVER: 2356 break; /drivers/nxp/ddr/phy-gen2/phy.c: 2298 in parse_odt() 2292 2293 if (i < 0 || i > 3) { 2294 printf("Error: invalid chip-select value\n"); 2295 } 2296 switch (val) { 2297 case DDR_ODT_CS: >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2298 odt[i] |= (1 << i) << shift; 2299 break; 2300 case DDR_ODT_ALL_OTHER_CS: 2301 for (j = 0; j < DDRC_NUM_CS; j++) { 2302 if (i == j) { 2303 continue; /drivers/nxp/ddr/phy-gen2/phy.c: 2316 in parse_odt() 2310 break; 2311 case DDR_ODT_CS_AND_OTHER_DIMM: 2312 odt[i] |= (1 << i) << 4; 2313 /* fallthrough */ 2314 case DDR_ODT_OTHER_DIMM: 2315 for (j = 0; j < DDRC_NUM_CS; j++) { >>> CID 369882: (BAD_SHIFT) >>> In expression "1 << i", shifting by a negative amount has undefined behavior. The shift amount, "i", is no more than -1. 2316 if ((((cs_d0 & (1 << i)) != 0) && 2317 ((cs_d1 & (1 << j)) != 0)) || 2318 (((cs_d1 & (1 << i)) != 0) && 2319 ((cs_d0 & (1 << j)) != 0))) { 2320 odt[j] |= (1 << i) << shift; 2321 } ** CID 369881: Memory - corruptions (OVERRUN) ________________________________________________________________________________________________________ *** CID 369881: Memory - corruptions (OVERRUN) /drivers/brcm/i2c/i2c.c: 556 in i2c_init() 550 { 551 if (bus_id > MAX_I2C) { 552 WARN("%s: Invalid Bus %u\n", __func__, bus_id); 553 return -1; 554 } 555 >>> CID 369881: Memory - corruptions (OVERRUN) >>> Overrunning callee's array of size 2 by passing argument "bus_id" (which evaluates to 2) in call to "iproc_i2c_init". 556 iproc_i2c_init(bus_id, speed); 557 return 0U; 558 } 559 560 /* 561 * Function Name: i2c_probe ** CID 369880: Error handling issues (CHECKED_RETURN) /drivers/nxp/ddr/nxp-ddr/utility.c: 43 in get_ddr_freq() ________________________________________________________________________________________________________ *** CID 369880: Error handling issues (CHECKED_RETURN) /drivers/nxp/ddr/nxp-ddr/utility.c: 43 in get_ddr_freq() 37 #define CCN_HN_F_SAM_NODEID_DDR1 0x18 38 #endif 39 40 unsigned long get_ddr_freq(struct sysinfo *sys, int ctrl_num) 41 { 42 if (sys->freq_ddr_pll0 == 0) { >>> CID 369880: Error handling issues (CHECKED_RETURN) >>> Calling "get_clocks" without checking return value (as is done elsewhere 4 out of 5 times). 43 get_clocks(sys); 44 } 45 46 switch (ctrl_num) { 47 case 0: 48 return sys->freq_ddr_pll0; ** CID 369879: Memory - corruptions (ARRAY_VS_SINGLETON) ________________________________________________________________________________________________________ *** CID 369879: Memory - corruptions (ARRAY_VS_SINGLETON) /drivers/brcm/i2c/i2c.c: 763 in i2c_write_byte() 757 struct iproc_xact_info info; 758 759 iproc_i2c_fill_info(&info, bus_id, devaddr, regoffset, &value, 760 SMBUS_PROT_WR_BYTE, 1U); 761 762 /* Refer to i2c_smbus_write_byte params passed. */ >>> CID 369879: Memory - corruptions (ARRAY_VS_SINGLETON) >>> Passing "info.data" via argument "&info" to function "iproc_i2c_data_send" which uses it as an array. This might corrupt or misinterpret adjacent memory locations. 763 rc = iproc_i2c_data_send(&info); 764 765 if (rc < 0) { 766 ERROR("%s: %s error accessing device 0x%x\n", 767 __func__, "Write", devaddr); 768 return -1; ** CID 369878: Control flow issues (DEADCODE) /drivers/nxp/ddr/nxp-ddr/utility.c: 169 in disable_unused_ddrc() ________________________________________________________________________________________________________ *** CID 369878: Control flow issues (DEADCODE) /drivers/nxp/ddr/nxp-ddr/utility.c: 169 in disable_unused_ddrc() 163 debug("Both controllers in use.\n"); 164 return 0; 165 } 166 167 for (i = 0; i < num_hnf_nodes; i++) { 168 val = mmio_read_64((uintptr_t)hnf_sam_ctrl); >>> CID 369878: Control flow issues (DEADCODE) >>> Execution cannot reach the expression "i < 4" inside this statement: "nodeid = ((disable_ddrc == ...". 169 nodeid = disable_ddrc == 1 ? CCN_HN_F_SAM_NODEID_DDR1 : 170 (disable_ddrc == 2 ? CCN_HN_F_SAM_NODEID_DDR0 : 171 (i < 4 ? CCN_HN_F_SAM_NODEID_DDR0 172 : CCN_HN_F_SAM_NODEID_DDR1)); 173 if (nodeid != (val & CCN_HN_F_SAM_NODEID_MASK)) { 174 debug("Setting HN-F node %d\n", i); ** CID 369877: Incorrect expression (NO_EFFECT) /drivers/nxp/ddr/nxp-ddr/utility.c: 145 in disable_unused_ddrc() ________________________________________________________________________________________________________ *** CID 369877: Incorrect expression (NO_EFFECT) /drivers/nxp/ddr/nxp-ddr/utility.c: 145 in disable_unused_ddrc() 139 switch (disable_ddrc) { 140 case 1: 141 priv->num_ctlrs = 1; 142 priv->spd_addr = &priv->spd_addr[priv->dimm_on_ctlr]; 143 priv->ddr[0] = priv->ddr[1]; 144 priv->ddr[1] = NULL; >>> CID 369877: Incorrect expression (NO_EFFECT) >>> Assigning "priv->phy[0]" to itself has no effect. 145 priv->phy[0] = priv->phy[0]; 146 priv->phy[1] = NULL; 147 debug("Disable first DDR controller\n"); 148 break; 149 case 2: 150 priv->num_ctlrs = 1; ** CID 369876: Incorrect expression (UNUSED_VALUE) /plat/nxp/soc-lx2160a/lx2160aqds/ddr_init.c: 333 in init_ddr() ________________________________________________________________________________________________________ *** CID 369876: Incorrect expression (UNUSED_VALUE) /plat/nxp/soc-lx2160a/lx2160aqds/ddr_init.c: 333 in init_ddr() 327 info.phy_gen2_fw_img_buf = PHY_GEN2_FW_IMAGE_BUFFER; 328 if (info.clk == 0) { 329 info.clk = get_ddr_freq(&sys, 1); 330 } 331 info.dimm_on_ctlr = DDRC_NUM_DIMM; 332 >>> CID 369876: Incorrect expression (UNUSED_VALUE) >>> Assigning value "DDR_WRM_BOOT_NT_SUPPORTED" to "info.warm_boot_flag" here, but that stored value is overwritten before it can be used. 333 info.warm_boot_flag = DDR_WRM_BOOT_NT_SUPPORTED; 334 #ifdef NXP_WARM_BOOT 335 info.warm_boot_flag = DDR_COLD_BOOT; 336 if (wrm_bt_flg != 0U) { 337 info.warm_boot_flag = DDR_WARM_BOOT; 338 } else { ** CID 369875: Uninitialized variables (UNINIT) /drivers/nxp/flexspi/nor/fspi.c: 134 in fspi_op_setup() ________________________________________________________________________________________________________ *** CID 369875: Uninitialized variables (UNINIT) /drivers/nxp/flexspi/nor/fspi.c: 134 in fspi_op_setup() 128 x_addr = FSPI_LUTREG_OFFSET + (uint32_t)(0x10 * fspi_op_seq_id); 129 if ((F_FLASH_SIZE_BYTES <= SZ_16M_BYTES) || (ignore_flash_sz)) { 130 x_instr0 = FSPI_INSTR_OPRND0(cmd_id1); 131 x_instr1 = FSPI_INSTR_OPRND1(FSPI_LUT_ADDR24BIT); 132 VERBOSE("CMD_ID = %x offset = 0x%x\n", cmd_id1, x_addr); 133 } else { >>> CID 369875: Uninitialized variables (UNINIT) >>> Using uninitialized value "cmd_id2". 134 x_instr0 = FSPI_INSTR_OPRND0(cmd_id2); 135 x_instr1 = FSPI_INSTR_OPRND1(FSPI_LUT_ADDR32BIT); 136 VERBOSE("CMD_ID = %x offset = 0x%x\n", cmd_id2, x_addr); 137 } 138 x_instr0 |= FSPI_INSTR_PAD0(FSPI_LUT_PAD1) 139 | FSPI_INSTR_OPCODE0(FSPI_LUT_CMD); ________________________________________________________________________________________________________ To view the defects in Coverity Scan visit, https://u15810271.ct.sendgrid.net/ls/click?upn=HRESupC-2F2Czv4BOaCWWCy7my0P…

4 years

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Re: [TF-A] please fix incomplete distclean Makefile target

by Nicolas Boulenguez

raghu.ncstate(a)icloud.com: > Are you pushing ssh://<username>@review.trustedfirmware.org:29418/TF-A/trusted-firmware-a HEAD:refs/for/integration? > Note that 29418 port. That tripped me up initially. It is not clear from your earlier emails where you cloned from(review.trustedfirmware.org or git.trustedfirmware.org). [α] links to [β] which recommends # git clone "https://review.trustedfirmware.org/TF-A/trusted-firmware-a" I had an existing repository (most contributors probably do) and used 'git add remote' and 'git fetch' instead. [α] recommends # git push <remote-name> HEAD:refs/for/integration%<topic-branch> As expected, the host requires a password. # git push ssh://<user>@review.trustedfirmware.org:29418/TF-A/trusted-firmware-a HEAD:refs/for/integration? -> fatal: invalid refspec 'HEAD:refs/for/integration?' Anyhow, the host would require an SSH key. [α] https://developer.trustedfirmware.org/w/tf_a/gerrit-getting-started/ [β] https://review.trustedfirmware.org/admin/repos/TF-A%2Ftrusted-firmware-a

4 years

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