https://bugs.freedesktop.org/show_bug.cgi?id=96243
--- Comment #2 from hiwatari.seiji@gmail.com --- I did another round of testing and am quite pleased with the results.
New setup:
# Host qemu: 2.10.0 kernel: 4.13.5-gentoo
# Guest: kernel: vmlinuz-4.13.6-1-default (OpenSUSE) cmdline: amdgpu.cik_support=1 modprobe.blacklist=radeon
I did a couple of restarts and am quite pleased, that no host-hangups occured. The chance of a successfull initialization of the graphics hardware within the guest is at around 60%.
When it fails, the following line is always the last visible:
fb: switching to amdgpudrmfb from EFI VGA
Additionally, even when everything works, there are a couple of ring test errors:
[drm:gfx_v7_0_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 2 test failed (scratch(0xC040)=0xCAFEDEAD)
I'll attach a new log-file showing the boot log when everything works.