ppc: 0.947
device: 0.907
VMM: 0.832
semantic: 0.814
graphic: 0.792
PID: 0.725
performance: 0.723
vnc: 0.634
kernel: 0.633
files: 0.619
network: 0.614
peripherals: 0.609
register: 0.575
architecture: 0.548
TCG: 0.537
socket: 0.521
boot: 0.510
hypervisor: 0.452
mistranslation: 0.452
risc-v: 0.431
arm: 0.414
permissions: 0.376
virtual: 0.353
user-level: 0.345
debug: 0.315
assembly: 0.301
i386: 0.216
x86: 0.205
KVM: 0.130
--------------------
ppc: 0.984
debug: 0.933
TCG: 0.865
boot: 0.411
device: 0.405
register: 0.382
PID: 0.313
files: 0.234
VMM: 0.177
semantic: 0.091
assembly: 0.086
permissions: 0.086
hypervisor: 0.079
virtual: 0.053
kernel: 0.038
performance: 0.037
architecture: 0.027
graphic: 0.014
socket: 0.014
KVM: 0.010
user-level: 0.008
mistranslation: 0.007
vnc: 0.007
peripherals: 0.005
network: 0.004
x86: 0.003
risc-v: 0.002
i386: 0.000
arm: 0.000

hw/ppc: Aborted (core dumped)

Reproducable:
$ ./ppc64-softmmu/qemu-system-ppc64 -S -machine ppce500,accel=tcg -device spapr-pci-host-bridge


qemu/hw/ppc/spapr_pci.c:1567:spapr_phb_realize: Object 0x55bda99744a0 is not an instance of type spapr-machine
Aborted (core dumped)

This is addressed by commit:

"f7d6bfc spapr_pci: fail gracefully with non-pseries machine types"


$ ./v2.11.0-1421-g7d84845/bin/qemu-system-ppc64 -S -machine ppce500,accel=tcg -device spapr-pci-host-bridge
qemu-system-ppc64: -device spapr-pci-host-bridge: spapr-pci-host-bridge needs a pseries machine

$ git tag --contains f7d6bfc
v2.11.0


1- https://git.qemu.org/?p=qemu.git;a=commit;h=f7d6bfcdc0fe49040aac3ac131a319cb5427957e

As noted in the previous comment, this bug was fixed in the 2.11 release.