anchao opened a new pull request, #15810:
URL: https://github.com/apache/nuttx/pull/15810
## Summary
qemu/ivshmem: switch proxy/server roles
In this PR we switch proxy/server roles to set proxy as remoteproc master,
This will help us communicate with the linux kernel without making any
changes
in the rpproxy_ivshmem configuration.
Build NuttX RTOS:
```
$ cmake -B proxy -DBOARD_CONFIG=qemu-armv8a:rpproxy_ivshmem -GNinja
$ cmake --build proxy
$ qemu-system-aarch64 -cpu cortex-a53 -nographic -machine
virt,virtualization=on,gic-version=3 -kernel proxy/nuttx \
-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,addr=0xb \
-object
memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/ivshmem0,size=4194304,share=yes
```
Bringup Linux Kernel:
```
$ qemu-system-aarch64 -M virt -cpu cortex-a57 -smp 1 -m 4G -kernel
linux/arch/arm64/boot/Image -initrd busybox-1.35.0/initramfs.cpio.gz \
-nographic -append "init=/init console=ttyAMA0" \
-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,addr=0xb -object \
memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/ivshmem0,size=4194304,share=yes
[ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x411fd070]
[ 0.000000] Linux version 6.14.0-rc1-00035-g998ca87a4914 (archer@archer)
(aarch64-linux-gnu-gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, GNU ld (GNU
Binutils for Ubuntu) 2.42) #7 SMP PREEMPT Tue Feb 11 12:19:40 CST 2025
[ 0.000000] KASLR enabled
[ 0.000000] random: crng init done
[ 0.000000] Machine model: linux,dummy-virt
...
[ 1.001209] remoteproc remoteproc0: ivshmem_rproc is available
[ 1.001548] remoteproc remoteproc0: attaching to ivshmem_rproc
[ 1.001721] ivshmem_rproc 0000:00:0b.0: dma declare pa=0x80000000d0
dma=0xd0 size=65536
[ 1.002164] ivshmem_rproc 0000:00:0b.0: mem entry pa=0x80000100d0
dma=0x100d0, size=4128560
[ 1.003605] ivshmem_rproc 0000:00:0b.0: attach entry
[ 1.005573] virtio_rpmsg_bus virtio1: rpmsg host is online
[ 1.005741] rproc-virtio rproc-virtio.1.auto: registered virtio1 (type 7)
[ 1.005873] remoteproc remoteproc0: remote processor ivshmem_rproc is now
attached
[ 1.012959] virtio_rpmsg_bus virtio1: creating channel rpmsg-syslog addr
0x400
[ 1.014240] virtio_rpmsg_bus virtio1: creating channel rpmsg-sensor addr
0x401
[ 1.014454] virtio_rpmsg_bus virtio1: creating channel rpmsg-ping addr
0x402
[ 1.014644] rpmsg_ping virtio1.rpmsg-ping.-1.1026: rpmsg_ping_probe
```
below is rpmsg-syslog from NuttX kernel
```
...
[ 1.116680] [ 0.000000] [ 0] [ INFO] [proxy]
pci_register_rptun_ivshmem_driver: Register ivshmem driver, id=0,
cpuname=server, master=0
[ 1.116867] [ 0.025900] [ 3] [ INFO] [proxy] pci_scan_bus:
pci_scan_bus for bus 0
[ 1.116987] [ 0.026900] [ 3] [ INFO] [proxy] pci_scan_bus: class =
00000600, hdr_type = 00000000
[ 1.117121] [ 0.027100] [ 3] [ INFO] [proxy] pci_scan_bus: 00:00
[1b36:0008]
[ 1.117232] [ 0.027500] [ 3] [ INFO] [proxy] pci_setup_device: pbar0
set bad mask
[ 1.117349] [ 0.027700] [ 3] [ INFO] [proxy] pci_setup_device: pbar1
set bad mask
[ 1.117460] [ 0.027900] [ 3] [ INFO] [proxy] pci_setup_device: pbar2
set bad mask
[ 1.117573] [ 0.028100] [ 3] [ INFO] [proxy] pci_setup_device: pbar3
set bad mask
[ 1.117692] [ 0.028200] [ 3] [ INFO] [proxy] pci_setup_device: pbar4
set bad mask
```
Signed-off-by: chao an <anchao.arc...@bytedance.com>
## Impact
N/A
## Testing
```
$ cmake -B proxy -DBOARD_CONFIG=qemu-armv8a:rpproxy_ivshmem -GNinja
$ cmake --build proxy
$ qemu-system-aarch64 -cpu cortex-a53 -nographic -machine
virt,virtualization=on,gic-version=3 -kernel proxy/nuttx \
-device ivshmem-plain,id=shmem0,memdev=shmmem-shmem0,addr=0xb \
-object
memory-backend-file,id=shmmem-shmem0,mem-path=/dev/shm/ivshmem0,size=4194304,share=yes
```
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