Issuse about running vm_multi app on qemu platform, udhcpc can not return.

[celestialtao]

After building vm_multi app for qemu and running ./simulate in my build directory, the console always printed the log "udhcpc: sending discover",which indicating udhcpc can not return. Meanwhile, your prebuilt rootfs did not support brctl in busybox judging from error log "/etc/init.d/S90bridge_setup: line 12: brctl: not found".

The related log was shown as follows:

Starting syslogd: OK
Starting syslogd: OK
Starting syslogd: OK
Starting klogd: OK
Starting klogd: OK
Starting klogd: OK
Running sysctl: OK
Running sysctl: OK
Running sysctl: OK
Initializing random number generator... [   43.352936] random: dd: uninitialized urandom read (512 bytes read)
done.
Initializing random number generator... [   43.476458] random: dd: uninitialized urandom read (512 bytes read)
done.
Initializing random number generator... [   44.130296] random: dd: uninitialized urandom read (512 bytes read)
done.
Starting network: OK
Starting network: OK
Starting network: OK
udhcpc: started, v1.31.0
udhcpc: started, v1.31.0
/etc/init.d/S90bridge_setup: line 12: brctl: not found

Welcome to Buildroot
[   53.859732] random: mktemp: uninitialized urandom read (6 bytes read)
[   53.967484] random: mktemp: uninitialized urandom read (6 bytes read)
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover
udhcpc: sending discover

These two errors may have some interdependency. Is the expected resutl for the vm_multi that an ip address will be respectively given to eth0 and br0?

[wom-bat]

I'm not sure this has ever worked with the qemu-arm-virt target. The simulate script generated doesn't set up a network, so udhcpc will never return an address.

[axel-h]

I'm not sure this has ever worked with the qemu-arm-virt target. The simulate script generated doesn't set up a network, so udhcpc will never return an address.

Maybe the simulate script does not do it explicitly, but in apps/Arm/vm_multi/settings.cmake we have this:

    set(
        qemu_sim_extra_args
        "-netdev tap,id=mynet0,ifname=tap0,script=no,downscript=no -device virtio-net,netdev=mynet0,mac=52:55:00:d1:55:01"
    )

[simone-arcari]

Has this issue been resolved?
I also have another issue, again on vm_multi running on qemu:

vm_ram_touch@guest_ram.c:165 Failed to touch ram region: Not registered RAM region
udhcpc: sending discover
vm_ram_touch@guest_ram.c:165 Failed to touch ram region: Not registered RAM region
udhcpc: sending discover
vm_ram_touch@guest_ram.c:165 Failed to touch ram region: Not registered RAM region
udhcpc: sending discover
vm_ram_touch@guest_ram.c:165 Failed to touch ram region: Not registered RAM region

do you know if there is a solution for this?