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[RFC]: remoteproc state definition discrepancy in openamp library and Linux kernel framework

by Tanmay Shah

Hello all, I found out that there is discrepancy between remoteproc state definition in kernel and open-amp library: Linux kernel side definition: https://github.com/torvalds/linux/blob/52da431bf03b5506203bca27fe14a97895c8… enum rproc_state { RPROC_OFFLINE = 0, RPROC_SUSPENDED = 1, RPROC_RUNNING = 2, RPROC_CRASHED = 3, RPROC_DELETED = 4, RPROC_ATTACHED = 5, RPROC_DETACHED = 6, RPROC_LAST = 7, }; open-amp library side definition: https://github.com/OpenAMP/open-amp/blob/391671ba24840833d882c1a75c5d730770… /** * @brief Remote processor states */ enum remoteproc_state { /** Remote is offline */ RPROC_OFFLINE = 0, /** Remote is configured */ RPROC_CONFIGURED = 1, /** Remote is ready to start */ RPROC_READY = 2, /** Remote is up and running */ RPROC_RUNNING = 3, /** Remote is suspended */ RPROC_SUSPENDED = 4, /** Remote is has error; need to recover */ RPROC_ERROR = 5, /** Remote is stopped */ RPROC_STOPPED = 6, /** Just keep this one at the end */ RPROC_LAST = 7, }; IIUC, both side state definition should match, so that if remote needs to report crash error, it can use same name and mapped int value in the code. Please let me know if I am missing something in this understanding. Should we fix this? If so, I believe it should be library side. I am looking for suggestion to fix this without breaking backward compatibility: Approach 1: deprecate library side remoteproc_state definition. deprecate current enum (with __deprecated attribute or add comment) and introduce new one with same definition as in linux kernel. Then after 2 year (as per code of conduct policy) we can remove remoteproc_state. Approach 2: Platform driver uses library side remoteproc state definition. If we don't want to fix this, then another approach is, platform driver in linux kernel should have library-side remoteproc state definition and convert interprete it to kernel side remoteproc definition. With this second approach we don't have to deprecate anything, but platform drivers are responsible to maintain different remoteproc_state definition. (Might create confusion). I am open to any other suggestion regarding this. Thanks, Tanmay

6 months

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[RFC] Proposal to add mailbox interface

by Levinsky, Ben

[AMD Official Use Only - AMD Internal Distribution Only] Hello All, Presently for the OpenAMP Legacy Demos available in the community system reference repo the interrupt mechanism involves Libmetal APIs directly writing to control registers. This is an issue because it is clearly coupling the demos to vendor-specific logic. If we could instead have a refactor of demos without the vendor-specific interrupt register writes this would be a code clean up. [1] In one of the Libmetal-supported OS's, Zephyr there is already IPM support, though it is being deprecated as we have been told upstream. [2][3] That being said, there is already mailbox support in Zephyr and AMD is upstreaming support for this too. In order to (a) clean up the vendor-specific register writes and (b) add a generic mailbox support to Libmetal libraries below is a proposal for a patch series. 1. Add mailbox support - lib/mbox.h - descripe APIs for init, deinit, send and receive. 2. Add stubs for baremetal for the above APIs 3. Add stubs for freertos for the above APIs. 4. Add implementation for Zephyr with: - init - As Zephyr OS statically defines mailbox structures today based on device tree, this will simply store the mailbox structure [4] - deinit - free mailbox - send/receive will simply wrap around the Zephyr APIs for mbox send/receive 1. https://github.com/OpenAMP/libmetal/tree/main/lib/system/zephyr 2. https://github.com/zephyrproject-rtos/zephyr/tree/main/drivers/mbox 3. (pull request pending) 4. https://github.com/zephyrproject-rtos/zephyr/tree/main/samples/drivers/mbox

6 months

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[OpenAMP/libmetal] 41c83b: lib: Remove system specific irq.h files

by Andrew Davis

Branch: refs/heads/main Home: https://github.com/OpenAMP/libmetal Commit: 41c83bcffd61b36d4e2dc3d083bc5b98c1682f5e https://github.com/OpenAMP/libmetal/commit/41c83bcffd61b36d4e2dc3d083bc5b98… Author: Andrew Davis <afd(a)ti.com> Date: 2025-06-20 (Fri, 20 Jun 2025) Changed paths: M lib/irq.h M lib/system/freertos/CMakeLists.txt R lib/system/freertos/irq.h M lib/system/generic/CMakeLists.txt R lib/system/generic/irq.h M lib/system/linux/device.c M lib/system/nuttx/CMakeLists.txt M lib/system/nuttx/init.c M lib/system/nuttx/irq.c M lib/system/zephyr/CMakeLists.txt R lib/system/zephyr/irq.h Log Message: ----------- lib: Remove system specific irq.h files Many of the system specific irq.h files are empty, and those that are not are only used by the internal IRQ handling functions. Remove the empty ones and do not expose the contents of the internal ones outside of the compilation unit that uses them. Signed-off-by: Andrew Davis <afd(a)ti.com> Commit: a2bf06dc3ee878edcad282d41d06e5b9c049f0e5 https://github.com/OpenAMP/libmetal/commit/a2bf06dc3ee878edcad282d41d06e5b9… Author: Andrew Davis <afd(a)ti.com> Date: 2025-06-20 (Fri, 20 Jun 2025) Changed paths: M lib/log.h M lib/system/freertos/CMakeLists.txt R lib/system/freertos/log.h M lib/system/generic/CMakeLists.txt R lib/system/generic/log.h M lib/system/linux/CMakeLists.txt R lib/system/linux/log.h M lib/system/nuttx/CMakeLists.txt R lib/system/nuttx/log.h M lib/system/nuttx/sys.h M lib/system/zephyr/sys.h Log Message: ----------- lib: Remove system specific log.h files Most of the system specific log.h files are empty, and those that are not are only used by the internal log handling functions. Remove the empty ones and do not expose the contents of the internal ones outside of the compilation unit that uses them. Signed-off-by: Andrew Davis <afd(a)ti.com> Compare: https://github.com/OpenAMP/libmetal/compare/96c7cd26dca9...a2bf06dc3ee8 To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

6 months

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Re: [RFC]: remoteproc state definition discrepancy in openamp library and Linux kernel framework

by Tanmay Shah

On 6/19/25 10:53 AM, Mathieu Poirier wrote: > Good morning, > > On Wed, 18 Jun 2025 at 10:44, Tanmay Shah <tanmay.shah(a)amd.com> wrote: >> >> Hello all, >> >> I found out that there is discrepancy between remoteproc state >> definition in kernel and open-amp library: >> >> Linux kernel side definition: >> >> https://github.com/torvalds/linux/blob/52da431bf03b5506203bca27fe14a97895c8… >> >> >> enum rproc_state { >> RPROC_OFFLINE = 0, >> RPROC_SUSPENDED = 1, >> RPROC_RUNNING = 2, >> RPROC_CRASHED = 3, >> RPROC_DELETED = 4, >> RPROC_ATTACHED = 5, >> RPROC_DETACHED = 6, >> RPROC_LAST = 7, >> }; >> >> open-amp library side definition: >> >> https://github.com/OpenAMP/open-amp/blob/391671ba24840833d882c1a75c5d730770… >> >> /** >> * @brief Remote processor states >> */ >> enum remoteproc_state { >> /** Remote is offline */ >> RPROC_OFFLINE = 0, >> /** Remote is configured */ >> RPROC_CONFIGURED = 1, >> /** Remote is ready to start */ >> RPROC_READY = 2, >> /** Remote is up and running */ >> RPROC_RUNNING = 3, >> /** Remote is suspended */ >> RPROC_SUSPENDED = 4, >> /** Remote is has error; need to recover */ >> RPROC_ERROR = 5, >> /** Remote is stopped */ >> RPROC_STOPPED = 6, >> /** Just keep this one at the end */ >> RPROC_LAST = 7, >> }; >> >> IIUC, both side state definition should match, so that if remote needs >> to report crash error, it can use same name and mapped int value in the >> code. Please let me know if I am missing something in this understanding. >> >> Should we fix this? >> > > The kernel's remoteproc subsystem and openAMP library are two > independent projects. OpenAMP does its own governance but I > personally don't see a reason to harmonize the value of their internal > states. > > Thanks, > Mathieu > Thanks Mathieu for your response. Yes we are reaching the same conclusion. >> If so, I believe it should be library side. >> >> I am looking for suggestion to fix this without breaking backward >> compatibility: >> >> Approach 1: deprecate library side remoteproc_state definition. >> >> deprecate current enum (with __deprecated attribute or add comment) and >> introduce new one with same definition as in linux kernel. Then after 2 >> year (as per code of conduct policy) we can remove remoteproc_state. >> >> Approach 2: Platform driver uses library side remoteproc state definition. >> >> If we don't want to fix this, then another approach is, platform driver >> in linux kernel should have library-side remoteproc state definition and >> convert interprete it to kernel side remoteproc definition. >> >> With this second approach we don't have to deprecate anything, but >> platform drivers are responsible to maintain different remoteproc_state >> definition. (Might create confusion). >> >> >> I am open to any other suggestion regarding this. >> >> Thanks, >> Tanmay >>

6 months

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[OpenAMP/open-amp]

by Arnaud Pouliquen

Branch: refs/tags/2025.04.0 Home: https://github.com/OpenAMP/open-amp To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/open-amp/settings/notifications

6 months, 3 weeks

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[OpenAMP/open-amp]

by Arnaud Pouliquen

Branch: refs/tags/v2025.04.0 Home: https://github.com/OpenAMP/open-amp To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/open-amp/settings/notifications

6 months, 3 weeks

1
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[OpenAMP/libmetal] 96c7cd: system: linux: include missing headers

by Arnaud Pouliquen

Branch: refs/heads/main Home: https://github.com/OpenAMP/libmetal Commit: 96c7cd26dca9b99986441d5e4dced0bb66e0ea4f https://github.com/OpenAMP/libmetal/commit/96c7cd26dca9b99986441d5e4dced0bb… Author: Vincenzo Calabretta <vincenzo.calabretta(a)embedded-brains.de> Date: 2025-06-02 (Mon, 02 Jun 2025) Changed paths: M test/system/linux/threads.c Log Message: ----------- system: linux: include missing headers Do not rely on indirect includes since they may not be present on some systems. Signed-off-by: Vincenzo Calabretta <vincenzo.calabretta(a)embedded-brains.de> To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

6 months, 3 weeks

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[OpenAMP/openamp-system-reference] d05460: examples: dts: xlnx: update dtso for remoteproc nodes

by Tanmay

Branch: refs/heads/main Home: https://github.com/OpenAMP/openamp-system-reference Commit: d0546027cd321466dfaf4f8888f9dd5432c7013f https://github.com/OpenAMP/openamp-system-reference/commit/d0546027cd321466… Author: Tanmay Shah <tanmay.shah(a)amd.com> Date: 2025-05-28 (Wed, 28 May 2025) Changed paths: M examples/linux/dts/xilinx/Makefile M examples/linux/dts/xilinx/xilinx-openamp-for-v6.x.dtso A examples/linux/dts/xilinx/zynqmp-lockstep.dtso M examples/linux/dts/xilinx/zynqmp-openamp.dtso R examples/linux/dts/xilinx/zynqmp-split.dtso Log Message: ----------- examples: dts: xlnx: update dtso for remoteproc nodes Use new remoteproc nodes introduced in 6.12 kernel. From 6.12 kernel, split mode is enabled by default for zcu102 board. All other boards remoteproc lockstep and split nodes are disabled by default. So enable split mode by default for all the boards via zynqmp-openamp.dtso and introduce zynqmp-lockstep.dtso to enable lockstep mode only when needed. Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/openamp-system-reference/settings/notifications

6 months, 3 weeks

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[OpenAMP/libmetal] dcf121: lib: optionally provide ATOMIC_VAR_INIT()

by Sebastian Huber

Branch: refs/heads/main Home: https://github.com/OpenAMP/libmetal Commit: dcf121ab617443166e976afbdd848569cf773895 https://github.com/OpenAMP/libmetal/commit/dcf121ab617443166e976afbdd848569… Author: Sebastian Huber <sebastian.huber(a)embedded-brains.de> Date: 2025-05-28 (Wed, 28 May 2025) Changed paths: M lib/atomic.h Log Message: ----------- lib: optionally provide ATOMIC_VAR_INIT() The ATOMIC_VAR_INIT() macro was deprecated in C17 and removed in C23. Signed-off-by: Sebastian Huber <sebastian.huber(a)embedded-brains.de> To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

6 months, 3 weeks

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[OpenAMP/openamp-system-reference] 63fbb9: zynq: Remove support for Zynq-7000 SoC

by ben

Branch: refs/heads/main Home: https://github.com/OpenAMP/openamp-system-reference Commit: 63fbb90069212ac0b70ba293f7cf31405d02acee https://github.com/OpenAMP/openamp-system-reference/commit/63fbb90069212ac0… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2025-05-28 (Wed, 28 May 2025) Changed paths: R examples/legacy_apps/cmake/platforms/zynq7_generic.cmake R examples/legacy_apps/cmake/platforms/zynq7_linux.cmake R examples/legacy_apps/machine/zynq7/CMakeLists.txt R examples/legacy_apps/machine/zynq7/platform_info.c R examples/legacy_apps/machine/zynq7/platform_info.h R examples/legacy_apps/machine/zynq7/platform_info_remoteproc_master.c R examples/legacy_apps/machine/zynq7/rsc_table.c R examples/legacy_apps/machine/zynq7/rsc_table.h R examples/legacy_apps/machine/zynq7/zynq_a9_rproc.c R examples/legacy_apps/system/generic/machine/zynq7/CMakeLists.txt R examples/legacy_apps/system/generic/machine/zynq7/Xilinx.spec R examples/legacy_apps/system/generic/machine/zynq7/helper.c R examples/legacy_apps/system/generic/machine/zynq7/linker_master.ld R examples/legacy_apps/system/generic/machine/zynq7/linker_remote.ld Log Message: ----------- zynq: Remove support for Zynq-7000 SoC Remove openamp support for Zynq-7000 SoC, following changes are done 1) remove folder apps/machine/zynq7 2) remove folder apps/system/generic/machine/zynq7 3) remove file cmake/platforms/zynq7_generic.cmake 4) remove file cmake/platforms/zynq7_linux.cmake 5) Modify README.md files Reasons to remove: 1) Support for Zynq-7000 has ended 2) Removing redundant or unmaintained code 3) Reduce technical debt carried by OpenAMP team 4) very few customer using openamp on Zynq-7000 SoC For using Zynq-7000 SoC support last working and tested version is (v2023.10) https://github.com/OpenAMP/open-amp/tree/v2023.10 Signed-off-by: Rajiv Mohan <rajiv.mohan(a)amd.com> Signed-off-by: Ben Levinsky <ben.levinsky(a)amd.com> To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/openamp-system-reference/settings/notifications

6 months, 3 weeks

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