[Bug 96243] GPU initialization fails when running in VM

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96243

--- Comment #2 from hiwatari.seiji at 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.

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