chore: enable user networking and ssh port forwarding for QEMU

[LoserJL]

Add params for QEMU:
-netdev "user,id=net0,hostfwd=tcp::2222-:22"
-device "virtio-net-pci,netdev=net0"
to enable user networking and ssh port forwarding.

[zevorn]

LGTM, Thanks for the contribution!

[LoserJL]

Run the cmd in qemu guest:
ip a
output:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: enp0s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
<cut here>
then modify /etc/netplan/50-cloud-init.yaml:
network:
version: 2
ethernets:
enp0s2:
hcp4: true
Note that enp0s2 is the output on my end, and you should modify it according to your own actual output.
After restarting QEMU or the network, the network connection will work properly.The QEMU terminal is rather inconvenient to use; you can open another terminal and run the following command:
ssh -p 2222 gem5@localhost
Enter the default password 12345 and you will be able to use it.

[zevorn]

Run the cmd in qemu guest: ip a output: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host noprefixroute valid_lft forever preferred_lft forever 2: enp0s2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 <cut here> then modify /etc/netplan/50-cloud-init.yaml: network: version: 2 ethernets: enp0s2: hcp4: true Note that enp0s2 is the output on my end, and you should modify it according to your own actual output. After restarting QEMU or the network, the network connection will work properly.The QEMU terminal is rather inconvenient to use; you can open another terminal and run the following command: ssh -p 2222 gem5@localhost Enter the default password 12345 and you will be able to use it.

Thanks for the reply, I will update the user manual.