CV-Bowen opened a new pull request, #17925: URL: https://github.com/apache/nuttx/pull/17925
*Note: Please adhere to [Contributing Guidelines](https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md).* ## Summary This PR enhances the RPMSG subsystem by unifying signal handling across all transport types and adding signal routing support for the RPMSG router transport. ## Changes ### 1. Unify RPMSG Signals Architecture (c1a7b0c) - **Unified signal storage**: Moved signal handling from individual transport private structures to the common `struct rpmsg_s` - **Simplified implementation**: Removed redundant signal fields from transport-specific structures - **Improved consistency**: All RPMSG transports now use the same signal mechanism ### 2. Add Signals Router for RPMSG Router (4050398) - **Router signal support**: RPMSG router transport now supports signal propagation - **Signal routing**: Signals from physical transports (port, virtio) are properly routed through the router - **Enhanced functionality**: Router can now handle and forward signal states between different transport endpoints ## Impact Rpmsg Port and Rpmsg Router ## Testing qemuv8a:rpserver and rpproxy ```c ❯ qemu-system-aarch64 -cpu cortex-a53 -nographic \ -machine virt,virtualization=on,gic-version=3 \ -chardev stdio,id=con,mux=on -serial chardev:con \ -object memory-backend-file,discard-data=on,id=shmmem-shmem0,mem-path=/dev/shm/my_shmem0,size=4194304,share=yes \ -device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,addr=0xb \ -device virtio-serial-device,bus=virtio-mmio-bus.0 \ -chardev socket,path=/tmp/rpmsg_port_uart_socket,server=on,wait=off,id=foo \ -device virtconsole,chardev=foo \ -mon chardev=con,mode=readline -kernel ./nuttx/cmake_out/v8a_server/nuttx \ -gdb tcp::7775 [ 0.000000] [ 0] [ INFO] [server] pci_register_rptun_ivshmem_driver: Register ivshmem driver, id=0, cpuname=proxy, master=1 [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: pci_scan_bus for bus 0 [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: class = 00000600, hdr_type = 00000000 [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: 00:00 [1b36:0008] [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar0 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar1 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar2 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar3 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar4 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar5 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: class = 00000200, hdr_type = 00000000 [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: 00:08 [1af4:1000] [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar0: mask64=fffffffe 32bytes [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar1: mask64=fffffff0 4096bytes [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar2 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar3 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar4: mask64=fffffffffffffff0 16384bytes [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: class = 00000500, hdr_type = 00000000 [ 0.000000] [ 3] [ INFO] [server] pci_scan_bus: 00:58 [1af4:1110] [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar0: mask64=fffffff0 256bytes [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar1 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar2: mask64=fffffffffffffff0 4194304bytes [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar4 set bad mask [ 0.000000] [ 3] [ INFO] [server] pci_setup_device: pbar5 set bad mask [ 0.000000] [ 3] [ INFO] [server] ivshmem_probe: shmem addr=0x10400000 size=4194304 reg=0x10008000 [ 0.000000] [ 3] [ INFO] [server] rptun_ivshmem_probe: shmem addr=0x10400000 size=4194304 NuttShell (NSH) NuttX-12.10.0 server> server> server> [ 0.000000] [ 0] [ INFO] [proxy] pci_register_rptun_ivshmem_driver: Register ivshmem driver, id=0, cpuname=server, master=0 [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: pci_scan_bus for bus 0 [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: class = 00000600, hdr_type = 00000000 [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: 00:00 [1b36:0008] [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar0 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar1 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar2 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar3 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar4 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar5 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: class = 00000200, hdr_type = 00000000 [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: 00:08 [1af4:1000] [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar0: mask64=fffffffe 32bytes [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar1: mask64=fffffff0 4096bytes [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar2 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar3 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar4: mask64=fffffffffffffff0 16384bytes [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: class = 00000500, hdr_type = 00000000 [ 0.000000] [ 3] [ INFO] [proxy] pci_scan_bus: 00:58 [1af4:1110] [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar0: mask64=fffffff0 256bytes [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar1 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar2: mask64=fffffffffffffff0 4194304bytes [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar4 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] pci_setup_device: pbar5 set bad mask [ 0.000000] [ 3] [ INFO] [proxy] ivshmem_probe: shmem addr=0x10400000 size=4194304 reg=0x10008000 [ 0.000000] [ 3] [ INFO] [proxy] rptun_ivshmem_probe: shmem addr=0x10400000 size=4194304 [ 0.000000] [ 3] [ INFO] [proxy] rptun_ivshmem_probe: Start the wdog server> server> server> server> ps TID PID PPID PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED FILLED COMMAND 0 0 0 0 FIFO Kthread - Ready 0000000000000000 0008160 0001792 21.9% Idle_Task 1 0 0 192 FIFO Kthread - Waiting Semaphore 0000000000000000 0008096 0001344 16.6% hpwork 0x40475c60 0x40475ce0 2 0 0 100 FIFO Kthread - Waiting Semaphore 0000000000000000 0008096 0001344 16.6% lpwork 0x40475d10 0x40475d90 4 0 0 224 FIFO Kthread - Waiting Semaphore 0000000000000000 0008096 0002032 25.0% rptun proxy 0x40495bb8 5 0 0 224 FIFO Kthread - Waiting Semaphore 0000000000000000 0008096 0001952 24.1% rpmsg-uart-rx proxy2 0x404a11f0 6 0 0 224 FIFO Kthread - Waiting Semaphore 0000000000000000 0008096 0001968 24.3% rpmsg-uart-tx proxy2 0x404a11f0 7 7 0 100 FIFO Task - Running 0000000000000000 0008128 0004176 51.3% nsh_main server> server> server> rpmsg ping all 1 1 1 1 [ 0.000000] [ 7] [ EMERG] [server] ping times: 1 [ 0.000000] [ 7] [ EMERG] [server] buffer_len: 2024, send_len: 17 [ 0.000000] [ 7] [ EMERG] [server] avg: 0 s, 18974880 ns [ 0.000000] [ 7] [ EMERG] [server] min: 0 s, 18974880 ns [ 0.000000] [ 7] [ EMERG] [server] max: 0 s, 18974880 ns [ 0.000000] [ 7] [ EMERG] [server] rate: 0.007167 Mbits/sec server> server> server> rptun ping all 1 1 1 1 [ 0.000000] [ 7] [ EMERG] [server] ping times: 1 [ 0.000000] [ 7] [ EMERG] [server] buffer_len: 2032, send_len: 17 [ 0.000000] [ 7] [ EMERG] [server] avg: 0 s, 25224240 ns [ 0.000000] [ 7] [ EMERG] [server] min: 0 s, 25224240 ns [ 0.000000] [ 7] [ EMERG] [server] max: 0 s, 25224240 ns [ 0.000000] [ 7] [ EMERG] [server] rate: 0.005391 Mbits/sec server> uname -a NuttX server 12.10.0 4050398e2de Jan 15 2026 14:30:04 arm64 qemu-armv8a server> rpmsg dump all [ 0.000000] [ 7] [ EMERG] [server] Remote: proxy2 state: 1 [ 0.000000] [ 7] [ EMERG] [server] ept NS [ 0.000000] [ 7] [ EMERG] [server] ept rpmsg-sensor [ 0.000000] [ 7] [ EMERG] [server] ept rpmsg-ping [ 0.000000] [ 7] [ EMERG] [server] rpmsg_port queue RX: {used: 0, avail: 8} [ 0.000000] [ 7] [ EMERG] [server] rpmsg buffer list: [ 0.000000] [ 7] [ EMERG] [server] rpmsg_port queue TX: {used: 0, avail: 8} [ 0.000000] [ 7] [ EMERG] [server] rpmsg buffer list: server> rptun dump all [ 0.000000] [ 7] [ EMERG] [server] Remote: proxy headrx 8 [ 0.000000] [ 7] [ EMERG] [server] Dump rpmsg info between cpu (master: yes)server <==> proxy: [ 0.000000] [ 7] [ EMERG] [server] rpmsg vq RX: [ 0.000000] [ 7] [ EMERG] [server] rpmsg vq TX: [ 0.000000] [ 7] [ EMERG] [server] rpmsg ept list: [ 0.000000] [ 7] [ EMERG] [server] ept NS [ 0.000000] [ 7] [ EMERG] [server] ept rpmsg-sensor [ 0.000000] [ 7] [ EMERG] [server] ept rpmsg-ping [ 0.000000] [ 7] [ EMERG] [server] ept rpmsg-syslog [ 0.000000] [ 7] [ EMERG] [server] rpmsg buffer list: [ 0.000000] [ 7] [ EMERG] [server] RX buffer, total 8, pending 0 [ 0.000000] [ 7] [ EMERG] [server] TX buffer, total 8, pending 0 server> ``` -- This is an automated message from the Apache Git Service. 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