You forgot to suppress the pvpanic device with the really old machine
types using pc_init_pci_no_kvmclock().
$ for i in `qemu-system-x86_64 -M help | awk '/^[a-z]/ { print $1 }'| grep -v
xen`; do echo -n $i; echo -e "info qtree\nq" | qemu-system-x86_64 -nodefaults
-S -nographic -monitor stdio -M $i | grep pvpanic || echo; done
pc dev: pvpanic, id ""
pc-i440fx-1.5 dev: pvpanic, id ""
pc-i440fx-1.4
pc-1.3
pc-1.2
pc-1.1
pc-1.0
pc-0.15
pc-0.14
pc-0.13 dev: pvpanic, id ""
pc-0.12 dev: pvpanic, id ""
pc-0.11 dev: pvpanic, id ""
pc-0.10 dev: pvpanic, id ""
isapc dev: pvpanic, id ""
q35 dev: pvpanic, id ""
pc-q35-1.5 dev: pvpanic, id ""
pc-q35-1.4
Sorry I didn't catch this earlier.
