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need help with my config

From: Lindsay Ryan
Subject: need help with my config
Date: Fri, 30 Jul 2021 04:25:23 +0000

I'm trying to emulate some physical IBM Power 9's that we have. There seems to be plenty of examples of using x86_64 qemu, but slightly less for Power. Unless it's specifically for installing AIX
Anyway, I'm trying to boot the VM as I guess a bare metal Power 9 box, then install redhat from Iso on a disk and have it on the network.

./qemu-system-ppc64 -cpu POWER9 -smp cpus=4 -machine pseries -m 4096 -M accel=tcg  -serial stdio -nodefaults -nographic -device megasas,id=scsi0,bus=pci.0,addr=0x5 -drive file=/home/hdisk1.qcow2,if=none,id=drive-scsi0-0-0-0,format=qcow2,cache=none -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=2 -cdrom /mnt/images/rhel-8.4-ppc64le-boot.iso -monitor telnet:,server,nowait -netdev bridge,id=net0,helper=qemu-bridge-helper,br=bridge0,id=hostnet0

So the megasas gets detected as a raid controller. Yay. 
But my qcow2 disk image doesn't seem to be plugged into it correctly as it's not detected. 
It sees the cdrom image and I can boot from it.
The other thing I can't get working is the network card. 

On this host system I have some other x86 kvm's running. So Ideally if I could plug the nic on this vm into 
7: virbr0

6: bridge0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:25:b5:04:2a:1e brd ff:ff:ff:ff:ff:ff
    inet brd scope global noprefixroute bridge0
       valid_lft forever preferred_lft forever
    inet6 fe80::76a8:89ec:fc62:9c94/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
    link/ether 52:54:00:51:db:be brd ff:ff:ff:ff:ff:ff
    inet brd scope global virbr0
       valid_lft forever preferred_lft forever

If I can't do that, then I really only need the ppc64 guest to have access out to the internet and I can nat anything incoming

Any help, particularly about how to plug virtual disk drives into virtual disk controllers would be helpful

Ryan Lindsay BEng, MSc.
Linux Storage Administrator
Research Computing Facility

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