Trying to help with the cpu type here - the default for the mentioned config
will be:
/usr/bin/qemu-system-ppc64le -name
guest=ubuntu19.10-ppc64le-test,debug-threads=on ...
-machine pseries-eoan,accel=tcg,usb=off,dump-guest-core=off ...
Without an explicit -cpu option set.
The libvirt XML just has no <cpu> section as all.
The default qemu picks in that case in the past was:
PowerPC power8_v2.0 PVR 004d0200
PowerPC power8 (alias for power8_v2.0)
Checking the qemu code shows:
4363 static void spapr_machine_3_1_class_options(MachineClass *mc)
4370 mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
With the code we can map this
(qemu versions go into the machine type, so xenial would be 2.5, bionic 2.11,
...):
new: power9_v2.0
<3.1 power8_v2.0
<2.7 power7_v2.3
So in the setup here it should be power9_v2.0 while in any release
before Eoan it would have been power8_v2.0.
I'd expect P9 should be P8 compatible, but maybe that helps in debugging this.
Downloading a ppc64 image for testing on my own ...
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https://bugs.launchpad.net/bugs/1847806
Title:
eoan: ppc64el install on pseries-eoan VM fails to install
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