QEMU for PowerPC usually provides the following devices that will be used on a VNC console:
Populating /vdevice methods
SCSI: Looking for devices
8001000000000000 CD-ROM : "QEMU QEMU CD-ROM 2.5+"
8000000000000000 DISK : "QEMU QEMU HARDDISK 2.5+"
00 0800 (B) : 1b36 0001 pci*
00 1000 (D) : 1b36 000d serial bus [ usb-xhci ]
00 1800 (D) : 1234 1111 qemu vga
00 2000 (D) : 1af4 1002 unknown-legacy-device*
Installing QEMU fb
If xhci driver is not available as a built-in module login console on VNC will end with no input devices making it impossible to login through the VNC console.
Created attachment 189450 [details]
Fix for this issue
A commit references this bug:
Date: Tue Jan 9 19:41:10 UTC 2018
New revision: 327736
Add XHCI support to powerpc64 GENERIC. This is useful to get input devices
supported on newer POWER hardware and in graphical VMs run on the same,
which are typically XHCI-only. The 32-bit GENERIC kernel, which
does not run on hardware made in the last decade and is unlikely to
encounter XHCI devices, is left unchanged.
Submitted by: Gustavo Romero
MFC after: 1 week