Create an AIX 7.2 VM on QEMU

Reference: QEMU - AIX on x86

Installing Qemu on Ubuntu.

sudo apt-get install qemu-system

Create a disk file.

qemu-img create -f qcow2 /mnt/e/Qemu/AIX_v7.2/hdisk0.qcow2 20G

Create an AIX VM.

qemu-system-ppc64 -cpu POWER8 -machine pseries,accel=tcg -m 4096 -serial stdio \
-drive file=/mnt/e/Qemu/AIX_v7.2/hdisk0.qcow2,if=none,id=drive-virtio-disk0 \
-device virtio-scsi-pci,id=scsi \
-device scsi-hd,drive=drive-virtio-disk0 \
-cdrom /mnt/e/Downloads/AIX_v7.2_Install_7200-03-03-1913_DVD_1_of_2_052019.iso \
-prom-env "boot-command=boot cdrom:"

Fix fsck64 issue in Maintenance mode.
fsck fails during boot and boot will hang. A workaround to this issue is to overwrite fsck64 file with exit 0. Boot the new AIX to maintenance mode:
When the "Welcome to Base Operating System" menu appears: choose 3 (Start Maintenance Mode) --> 1 (Access a Root VG) --> 0 Continue --> 1 (VG on hdisk0) --> 1 (Access this VG and start a shell).

cat <<EOF >/sbin/helpers/jfs2/fsck64
#!/bin/ksh
exit 0
EOF

sync
halt

Boot from disk.

qemu-system-ppc64 -cpu POWER8 -machine pseries,accel=tcg -m 4096 -serial stdio \
-drive file=/mnt/e/Qemu/AIX_v7.2/hdisk0.qcow2,if=none,id=drive-virtio-disk0 \
-device virtio-scsi-pci,id=scsi \
-device scsi-hd,drive=drive-virtio-disk0 \
-cdrom /mnt/e/Downloads/AIX_v7.2_Install_7200-03-03-1913_DVD_1_of_2_052019.iso \
-prom-env "boot-command=boot disk:"

This boot will take much longer (about 5-10 minutes) as some daemons will fail and it will hang at NFS part until timeout, but we will get a prompt. After that some services will be disabled (so next boots will be faster) and installed ssh from DVD.
Disabling services in inittab.

rmitab rcnfs
rmitab cron
rmitab piobe
rmitab qdaemon
rmitab writesrv
rmitab naudio2
rmitab naudio
rmitab aso
rmitab clcomd
chrctcp -S -d tftpd

Install ssh and change root password.

chfs -a size=+200M /home
mount -v cdrfs -o ro /dev/cd0 /mnt
mkdir /home/ssh; cd /mnt/installp/ppc; cp openssh.base openssh.license openssh.man.en_US openssh.msg.en_US /home/ssh; umount /mnt
cd /home/ssh; installp -acXY -d . all
passwd root
halt

Local Network setup.

sudo ip tuntap add tap0 mode tap
sudo ip link set tap0 up
sudo brctl addbr br0
sudo brctl setfd br0 0
sudo ifconfig br0 10.0.0.2 netmask 255.255.255.0 broadcast 10.0.0.255 up
sudo brctl addif br0 tap0
sudo ifconfig tap0 0.0.0.0
sudo sysctl net.ipv4.ip_forward=1

Boot up AIX using tap0 device:

qemu-system-ppc64 -cpu POWER8 -machine pseries -m 4096 -serial stdio \
-drive file=/mnt/e/Qemu/AIX_v7.2/hdisk0.qcow2,if=none,id=drive-virtio-disk0 \
-device virtio-scsi-pci,id=scsi \
-device scsi-hd,drive=drive-virtio-disk0 \
-cdrom /mnt/e/Downloads/AIX_v7.2_Install_7200-03-03-1913_DVD_1_of_2_052019.iso \
-prom-env "boot-command=boot disk:" \
-net nic -net tap,script=no,ifname=tap0

Setup network in AIX.

chdev -l en0 -a netaddr=10.0.0.100 -a netmask=255.255.255.0 -a state=up
route add 0 10.0.0.2
ifconfig -a
netstat -nr

Boot in the background without a console.

qemu-system-ppc64 -cpu POWER8 -machine pseries -m 4096 \
-drive file=/mnt/e/Qemu/AIX_v7.2/hdisk0.qcow2,if=none,id=drive-virtio-disk0 \
-device virtio-scsi-pci,id=scsi \
-device scsi-hd,drive=drive-virtio-disk0 \
-cdrom /mnt/e/Downloads/AIX_v7.2_Install_7200-03-03-1913_DVD_1_of_2_052019.iso \
-prom-env "boot-command=boot disk:" \
-net nic -net tap,script=no,ifname=tap0 -daemonize

Errors

qemu-system-x86_64: failed to initialize kvm: Permission denied

The default permission is 660.

sakura@sakurayumeno:~$ ls -l /dev/kvm
crw-rw---- 1 root kvm 10, 232 Jun 27 17:14 /dev/kvm

Workaround:
Change permission to 666, or use sudo to elevate permissions.

sakura@sakurayumeno:~$ sudo chmod 666 /dev/kvm
[sudo] password for sakura:
sakura@sakurayumeno:~$ !ls
ls -l /dev/kvm
crw-rw-rw- 1 root kvm 10, 232 Jun 27 17:14 /dev/kvm

sakura@sakurayumeno:~$ sudo qemu-system-x86_64 -m 4G -smp 4 -cpu host \
-usb \
-device usb-tablet \
-boot d \
-enable-kvm \
-drive file=/mnt/e/blog/source/assets/software/iso/Win10PE_20240519.iso,media=cdrom \
-device virtio-gpu-pci