- Openamp-rp - lists.openampproject.org

RPMsg IOCTL access without root permissions from Linux userspace

by Shah, Tanmay

Hi all, I am working on remoteproc auto-boot feature. While working on this, I realized it should be possible to achieve RPMsg communication without root access given to the user. Existing demos doesn't support it, but I want to open discussion on how that can be achieved. One way discussed was, to use IOCTLS to create RPMSg devices, and I had open issue here: https://github.com/OpenAMP/openamp-system-reference/issues/50 I tried to modify echo_test[1] demo and use IOCTLS instead of accessing devices from sysfs directly, but that still need root access. My goal is to design following workflow for the RPMsg communication with the remote processor: 1. Linux device-tree has auto-boot property enabled. 2. During boot, driver parses auto-boot related properties, loads fw and boots rproc automatically (without user's involvement) 3. After boot, rproc firmware does name service announcement of RPMsg channels. 4. Linux creates RPMsg devices and ept based on above announcement. 5. Userspace apps uses RPMsg ioctls to create ept and rpmsg devices. 6. Userspace apps uses created devices for RPMsg communication with the remote processor. As per my testing, as of now step-5 and step-6 needs root access. Ideally userspace apps should be able to create/read/write/close rpmsg devices without root access (for security purposes). Is there any other way this problem is solved? I appreciate your input. Thank You, Tanmay References: [1] https://github.com/OpenAMP/openamp-system-reference/blob/main/examples/linu…

2 days, 1 hour

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[OpenAMP/libmetal] 90d19d: libmetal: cmake: support machine less build

by Arnaud Pouliquen

Branch: refs/heads/main Home: https://github.com/OpenAMP/libmetal Commit: 90d19dc759c89220e04b987b4e00556506b8ad25 https://github.com/OpenAMP/libmetal/commit/90d19dc759c89220e04b987b4e005565… Author: Tanmay Shah <tanmay.shah(a)amd.com> Date: 2026-02-04 (Wed, 04 Feb 2026) Changed paths: M cmake/options.cmake M lib/system/freertos/CMakeLists.txt M lib/system/generic/CMakeLists.txt M test/system/freertos/CMakeLists.txt M test/system/generic/CMakeLists.txt M test/system/linux/CMakeLists.txt M test/system/zephyr/CMakeLists.txt Log Message: ----------- libmetal: cmake: support machine less build libmetal can be build without any machine support. It is possible that vendors implement machine specific interfaces outside of libmetal and link it with demos during build time. Hence, remove requirement to have MACHINE and PROJECT_MACHINE variables from the build system. If vendor prefer to choose 'template' machine, they can pass such option during cmake configuration. Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> Commit: 9c593d7a95d9381ee7d0934ae4c3a6f6311fb9be https://github.com/OpenAMP/libmetal/commit/9c593d7a95d9381ee7d0934ae4c3a6f6… Author: Tanmay Shah <tanmay.shah(a)amd.com> Date: 2026-02-04 (Wed, 04 Feb 2026) Changed paths: R lib/system/freertos/xlnx/CMakeLists.txt Log Message: ----------- lib: freertos: remove xlnx vendor directory This directory was removed and re-inroduced by mistake, and should not exists in the libmetal. Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> Commit: ece95f0e71811c44a4c23d9a1514f338ccf60c75 https://github.com/OpenAMP/libmetal/commit/ece95f0e71811c44a4c23d9a1514f338… Author: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Date: 2026-02-04 (Wed, 04 Feb 2026) Changed paths: M lib/system/freertos/sys.h M lib/system/freertos/template/CMakeLists.txt R lib/system/freertos/template/sys.h M lib/system/generic/sys.h M lib/system/generic/template/CMakeLists.txt R lib/system/generic/template/sys.h Log Message: ----------- lib: system: template: remove template/sys.h for generic and freeRTOS Declare sys_irq_enable() and sys_irq_enable() directly in lib/system/@PROJECT_SYSTEM@/sys.h. This allows to declare the machine out of tree of the libmetal but also to support the in-tree template. [minor style fix by tanmay] Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> Compare: https://github.com/OpenAMP/libmetal/compare/9196a664c425...ece95f0e7181 To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

4 days, 8 hours

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[OpenAMP/openamp-system-reference] 4bdabb: examples: legacy_apps: vendor: Add initial vendor ...

by ben

Branch: refs/heads/main Home: https://github.com/OpenAMP/openamp-system-reference Commit: 4bdabbb5b6aaaa902f56d408c091dbefc11e62ca https://github.com/OpenAMP/openamp-system-reference/commit/4bdabbb5b6aaaa90… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-29 (Thu, 29 Jan 2026) Changed paths: M examples/legacy_apps/CMakeLists.txt M examples/legacy_apps/cmake/options.cmake M examples/legacy_apps/machine/CMakeLists.txt R examples/legacy_apps/machine/microblaze_generic/CMakeLists.txt R examples/legacy_apps/machine/microblaze_generic/README.md R examples/legacy_apps/machine/microblaze_generic/platform_info.c R examples/legacy_apps/machine/microblaze_generic/platform_info.h R examples/legacy_apps/machine/microblaze_generic/rsc_table.c R examples/legacy_apps/machine/microblaze_generic/rsc_table.h R examples/legacy_apps/machine/microblaze_generic/zynqmp_mb_a53_rproc.c A examples/legacy_apps/machine/xlnx/CMakeLists.txt A examples/legacy_apps/machine/xlnx/README.md A examples/legacy_apps/machine/xlnx/linker_files/lscript_r5.ld.in A examples/legacy_apps/machine/xlnx/linker_files/lscript_versal_r5.ld.in A examples/legacy_apps/machine/xlnx/microblaze_generic/CMakeLists.txt A examples/legacy_apps/machine/xlnx/microblaze_generic/README.md A examples/legacy_apps/machine/xlnx/microblaze_generic/platform_info.c A examples/legacy_apps/machine/xlnx/microblaze_generic/platform_info.h A examples/legacy_apps/machine/xlnx/microblaze_generic/rsc_table.c A examples/legacy_apps/machine/xlnx/microblaze_generic/rsc_table.h A examples/legacy_apps/machine/xlnx/microblaze_generic/zynqmp_mb_a53_rproc.c A examples/legacy_apps/machine/xlnx/zynqmp/CMakeLists.txt A examples/legacy_apps/machine/xlnx/zynqmp/openamp-linux-userspace.dtsi A examples/legacy_apps/machine/xlnx/zynqmp/platform_info.c A examples/legacy_apps/machine/xlnx/zynqmp/platform_info.h A examples/legacy_apps/machine/xlnx/zynqmp/zynqmp_linux_r5_proc.c A examples/legacy_apps/machine/xlnx/zynqmp_r5/CMakeLists.txt A examples/legacy_apps/machine/xlnx/zynqmp_r5/freertos/gic_init.c A examples/legacy_apps/machine/xlnx/zynqmp_r5/generic/gic_init.c A examples/legacy_apps/machine/xlnx/zynqmp_r5/helper.c A examples/legacy_apps/machine/xlnx/zynqmp_r5/linker_large_text.ld A examples/legacy_apps/machine/xlnx/zynqmp_r5/linker_remote.ld A examples/legacy_apps/machine/xlnx/zynqmp_r5/platform_info.c A examples/legacy_apps/machine/xlnx/zynqmp_r5/platform_info.h A examples/legacy_apps/machine/xlnx/zynqmp_r5/rsc_table.c A examples/legacy_apps/machine/xlnx/zynqmp_r5/rsc_table.h A examples/legacy_apps/machine/xlnx/zynqmp_r5/zynqmp_r5_a53_rproc.c R examples/legacy_apps/machine/zynqmp/CMakeLists.txt R examples/legacy_apps/machine/zynqmp/openamp-linux-userspace.dtsi R examples/legacy_apps/machine/zynqmp/platform_info.c R examples/legacy_apps/machine/zynqmp/platform_info.h R examples/legacy_apps/machine/zynqmp/zynqmp_linux_r5_proc.c R examples/legacy_apps/machine/zynqmp_r5/CMakeLists.txt R examples/legacy_apps/machine/zynqmp_r5/freertos/gic_init.c R examples/legacy_apps/machine/zynqmp_r5/generic/gic_init.c R examples/legacy_apps/machine/zynqmp_r5/linker_large_text.ld R examples/legacy_apps/machine/zynqmp_r5/linker_remote.ld R examples/legacy_apps/machine/zynqmp_r5/platform_info.c R examples/legacy_apps/machine/zynqmp_r5/platform_info.h R examples/legacy_apps/machine/zynqmp_r5/rsc_table.c R examples/legacy_apps/machine/zynqmp_r5/rsc_table.h R examples/legacy_apps/machine/zynqmp_r5/zynqmp_r5_a53_rproc.c Log Message: ----------- examples: legacy_apps: vendor: Add initial vendor port for AMD-Xilinx platforms Add CMake logic to build AMD-xilinx classic OpenAMP RPU Firmware demos using Software Hardware Exchange Loop (SHEL) Flow to generate linker script. This can be done with Lopper to generate the device tree and native CMake, Yocto AMD-Xilinx Embedded Development Framework (EDF) or Vitis Unified IDE Workflows. As part of this add options for vendor specific build. By default all tests and examples will still build but add options to make each mutable. 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

1 week, 3 days

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[OpenAMP/open-amp] 59e843: CI: Fix compliance check folder bypass

by Arnaud Pouliquen

Branch: refs/heads/main Home: https://github.com/OpenAMP/open-amp Commit: 59e843f3efd788c181436066298a3e03273bc4a1 https://github.com/OpenAMP/open-amp/commit/59e843f3efd788c181436066298a3e03… Author: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: M .github/workflows/compliance.yml Log Message: ----------- CI: Fix compliance check folder bypass On GitHub, this check is tagged as "Required." However, if a PR only affects the following folders:.github, docs, scripts, or cmake, the check is not executed (to avoid false positives), resulting in the status "execution pending" + "required" on GitHub. This commit forces the execution of the check but bypasses the compliance.xml test when the PR only affects the listed folders. If at least one update affects other folders, the compliance check runs as usual. In addition, the cmake folder is removed from the list, as there is no reason to skip compliance tests on it. Signed-off-by: Arnaud Pouliquen arnaud.pouliquen(a)foss.st.com To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/open-amp/settings/notifications

1 week, 6 days

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[OpenAMP/openamp-system-reference] c18492: examples: libmetal: amd_rpu: baremetal: Fix wait c...

by ben

Branch: refs/heads/main Home: https://github.com/OpenAMP/openamp-system-reference Commit: c1849243878fa57686ab67fc8571e0a3dab24c94 https://github.com/OpenAMP/openamp-system-reference/commit/c1849243878fa576… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: M examples/libmetal/machine/remote/amd_rpu/system/generic/amp_demo_os.h Log Message: ----------- examples: libmetal: amd_rpu: baremetal: Fix wait condition As the resume condition clears the flag, this should check if clear. Signed-off-by: Ben Levinsky <ben.levinsky(a)amd.com> Commit: a1606dff2d51f3f00ced4b463ba64fc274eb1899 https://github.com/OpenAMP/openamp-system-reference/commit/a1606dff2d51f3f0… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: M examples/libmetal/machine/remote/amd_rpu/system/generic/gic_init.c Log Message: ----------- examples: libmetal: amd_rpu: baremetal: Use AMD recommended ISR via IPIPSU driver AMD BSP recommended usage recommends using IPI driver to hook in IPIPSU driver. Reference example here: https://github.com/xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drive… As part of this remove unneeded lines. Also use config.h provided IPI value to get the IPIPSU instance. Signed-off-by: Ben Levinsky <ben.levinsky(a)amd.com> Commit: c5211b46efc4b831df04203fb3886fde75d0e5d8 https://github.com/OpenAMP/openamp-system-reference/commit/c5211b46efc4b831… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: M examples/libmetal/demos/irq_shmem_demo/README.md M examples/libmetal/demos/irq_shmem_demo/host/irq_shmem_demo.c M examples/libmetal/demos/irq_shmem_demo/remote/irq_shmem_demo.c M examples/libmetal/machine/host/amd_linux_userspace/CMakeLists.txt M examples/libmetal/machine/host/amd_linux_userspace/README.md M examples/libmetal/machine/host/amd_linux_userspace/common.h A examples/libmetal/machine/host/amd_linux_userspace/config.h.in M examples/libmetal/machine/host/amd_linux_userspace/platform_init.c M examples/libmetal/machine/remote/amd_rpu/CMakeLists.txt M examples/libmetal/machine/remote/amd_rpu/README.md M examples/libmetal/machine/remote/amd_rpu/build_deps.cmake M examples/libmetal/machine/remote/amd_rpu/common.h A examples/libmetal/machine/remote/amd_rpu/config.h.in A examples/libmetal/machine/remote/amd_rpu/linker_files/lscript_r5.ld.in A examples/libmetal/machine/remote/amd_rpu/linker_files/lscript_r52_generic.ld.in A examples/libmetal/machine/remote/amd_rpu/linker_files/lscript_versal_net_r5.ld.in A examples/libmetal/machine/remote/amd_rpu/linker_files/lscript_versal_r5.ld.in M examples/libmetal/machine/remote/amd_rpu/platform_init.c M examples/libmetal/machine/remote/amd_rpu/system/generic/gic_init.c Log Message: ----------- examples: libmetal: align demo carveouts with OpenAMP layout Move the libmetal host/remote demo off the legacy single 3ed80000.shm window to the OpenAMP-style carveouts at 0x09860000 with separate descriptor UIOs (9860000.shm_desc, 9864000.shm_desc) and payload (9868000.shm), update the platform init code to open/map the new descriptor regions, add optional config-driven IPI overrides, and match the RPU defaults to the same layout. As part of this, mimic OpenAMP vendor-specific demos in that they will also support support use of unified CMake-driven symbols. This enables external tooling to generate a .cmake file from the system device tree that configures the demo for the target platform without manual edits to source files. Key changes: - Add config.h.in templates for both Linux host and RPU remote that use #cmakedefine to optionally override defaults from common.h - Separate monolithic SHM_BASE_ADDR/SHM_SIZE into distinct carveouts: * SHM0_DESC_BASE/SIZE - descriptor ring 0 * SHM1_DESC_BASE/SIZE - descriptor ring 1 * SHM_PAYLOAD_BASE/SIZE - data payload area - Wrap all platform-specific IPI symbols in #ifndef guards: * IPI_DEV_NAME, IPI_BASE_ADDR, IPI_MASK - Wrap all platform-specific TTC symbols in #ifndef guards: * TTC_DEV_NAME, TTC0_BASE_ADDR, TTC_NODEID - Include demo-specific specific symbols for IPI, Shared memory and TTC as provided by configure-time generated config.h file. - Configure linker script via .cmake metadata too. Signed-off-by: Ben Levinsky <ben.levinsky(a)amd.com> Commit: 54d438856c372c5704d5f8640f97e48558388efd https://github.com/OpenAMP/openamp-system-reference/commit/54d438856c372c57… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: M examples/libmetal/machine/host/amd_linux_userspace/CMakeLists.txt R examples/libmetal/machine/host/amd_linux_userspace/ipi-uio.c Log Message: ----------- examples: libmetal: amd_linux_userspace: remove UIO unused C file UIO C file is dead code. remove it. Signed-off-by: Ben Levinsky <ben.levinsky(a)amd.com> Commit: a591224d413fb3d7d028e6ce3af1b2bf875d7dee https://github.com/OpenAMP/openamp-system-reference/commit/a591224d413fb3d7… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: M examples/libmetal/machine/host/amd_linux_userspace/CMakeLists.txt Log Message: ----------- examples: libmetal: amd_linux_userspace: simplify build Simplify build as it was previously based off legacy Libmetal Linux AMP Demo. Streamline it to just pick up and deliver a statically linked executable. Signed-off-by: Ben Levinsky <ben.levinsky(a)amd.com> Compare: https://github.com/OpenAMP/openamp-system-reference/compare/1a21aaefa874...… To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/openamp-system-reference/settings/notifications

1 week, 6 days

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[OpenAMP/openamp-system-reference] 1a21aa: zephyr: add versalnet_rpu support

by ben

Branch: refs/heads/main Home: https://github.com/OpenAMP/openamp-system-reference Commit: 1a21aaefa87404b306511d6f26600ffd6a582567 https://github.com/OpenAMP/openamp-system-reference/commit/1a21aaefa87404b3… Author: Ben Levinsky <ben.levinsky(a)amd.com> Date: 2026-01-26 (Mon, 26 Jan 2026) Changed paths: A examples/zephyr/rpmsg_multi_services/boards/versalnet_rpu.conf M examples/zephyr/rpmsg_multi_services/sample.yaml Log Message: ----------- zephyr: add versalnet_rpu support The Versal-NET RPU board uses MBOX so in this demo use IPM over MBOX driver for that board. 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

1 week, 6 days

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[OpenAMP/libmetal]

by Arnaud Pouliquen

Branch: refs/tags/v2025.10.1 Home: https://github.com/OpenAMP/libmetal To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

2 weeks, 5 days

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[OpenAMP/libmetal] 12b07f: release: libmetal 2025.10.1

by Arnaud Pouliquen

Branch: refs/heads/v2025.10 Home: https://github.com/OpenAMP/libmetal Commit: 12b07f618c34d5e93f9d127c5bf7c927e4540469 https://github.com/OpenAMP/libmetal/commit/12b07f618c34d5e93f9d127c5bf7c927… Author: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Date: 2026-01-20 (Tue, 20 Jan 2026) Changed paths: M VERSION Log Message: ----------- release: libmetal 2025.10.1 Set library version to 1.9.1 Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

2 weeks, 5 days

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[OpenAMP/libmetal] 9196a6: CI: Update QEMU Xtensa board name

by Arnaud Pouliquen

Branch: refs/heads/main Home: https://github.com/OpenAMP/libmetal Commit: 9196a664c425c8c065a70efd7f0a260610c51e2c https://github.com/OpenAMP/libmetal/commit/9196a664c425c8c065a70efd7f0a2606… Author: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Date: 2026-01-20 (Tue, 20 Jan 2026) Changed paths: M .github/actions/build_ci/entrypoint.sh Log Message: ----------- CI: Update QEMU Xtensa board name The board "qemu_xtensa" has been renamed to "qemu_xtensa/dc233c" and deprecated in the Zephyr commit: https://github.com/zephyrproject-rtos/zephyr/commit/84c12ab5b5faf478cd264e0… Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

2 weeks, 5 days

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[OpenAMP/libmetal] 37f4b7: libmetal: cmake: support machine less build

by Arnaud Pouliquen

Branch: refs/heads/v2025.10 Home: https://github.com/OpenAMP/libmetal Commit: 37f4b7389a216b301570c05e29814b8b5bbe16d4 https://github.com/OpenAMP/libmetal/commit/37f4b7389a216b301570c05e29814b8b… Author: Tanmay Shah <tanmay.shah(a)amd.com> Date: 2026-01-19 (Mon, 19 Jan 2026) Changed paths: M cmake/options.cmake M lib/system/freertos/CMakeLists.txt M lib/system/generic/CMakeLists.txt M test/system/freertos/CMakeLists.txt M test/system/generic/CMakeLists.txt M test/system/linux/CMakeLists.txt M test/system/zephyr/CMakeLists.txt Log Message: ----------- libmetal: cmake: support machine less build libmetal can be build without any machine support. It is possible that vendors implement machine specific interfaces outside of libmetal and link it with demos during build time. Hence, remove requirement to have MACHINE and PROJECT_MACHINE variables from the build system. If vendor prefer to choose 'template' machine, they can pass such option during cmake configuration. Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> Commit: ad4b08d4636e342ffe1bd35b0cfe0eb15bf5199f https://github.com/OpenAMP/libmetal/commit/ad4b08d4636e342ffe1bd35b0cfe0eb1… Author: Tanmay Shah <tanmay.shah(a)amd.com> Date: 2026-01-19 (Mon, 19 Jan 2026) Changed paths: R lib/system/freertos/xlnx/CMakeLists.txt Log Message: ----------- lib: freertos: remove xlnx vendor directory This directory was removed and re-inroduced by mistake, and should not exists in the libmetal. Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> Commit: f281301e4bfd7acede8d3322eddd191a43841631 https://github.com/OpenAMP/libmetal/commit/f281301e4bfd7acede8d3322eddd191a… Author: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Date: 2026-01-19 (Mon, 19 Jan 2026) Changed paths: M lib/system/freertos/sys.h M lib/system/freertos/template/CMakeLists.txt R lib/system/freertos/template/sys.h M lib/system/generic/sys.h M lib/system/generic/template/CMakeLists.txt R lib/system/generic/template/sys.h Log Message: ----------- lib: system: template: remove template/sys.h for generic and freeRTOS Declare sys_irq_enable() and sys_irq_enable() directly in lib/system/@PROJECT_SYSTEM@/sys.h. This allows to declare the machine out of tree of the libmetal but also to support the in-tree template. [minor style related fix by tanmay] Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen(a)foss.st.com> Signed-off-by: Tanmay Shah <tanmay.shah(a)amd.com> Compare: https://github.com/OpenAMP/libmetal/compare/dbf9cf5286b4...f281301e4bfd To unsubscribe from these emails, change your notification settings at https://github.com/OpenAMP/libmetal/settings/notifications

2 weeks, 6 days

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