[Bug 96243] GPU initialization fails

[Bug 96243] GPU initialization fails

[bugzilla-daemon]

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

            Bug ID: 96243
           Summary: GPU initialization fails
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: hiwatari.seiji@gmail.com

Created attachment 124126
  --> https://bugs.freedesktop.org/attachment.cgi?id=124126&action=edit
dmesg output after modprobing amdgpu

Setup:
QEMU + VFIO running VM with Ubuntu 16.04 and the latest amdgpu driver
(amdgpu-pro 16.20.3)

If the system is started normally, the kernel crashes during boot with various
errors (varies from boot to boot!).

If the module (amdgpu) is blacklisted during boot (grub.cfg) and modprobed
afterwards the error always the same [see attached file]:

sw_init 5 failed -12
amdgpu_init failed
memory type 2 has not been initialized
amdgpu probe failed with error -12

Experiments:

- Using the amdgpu version shipped with Ubuntu 16.04, booting works ONCE.
Rebooting/Shutting-Down the VM leads to consecutive errors of not beeing able
to init the GPU again, probably due to Bonaire PCI-Reset issues. Restarting the
Host itself allows booting the VM once more. Hereafter: Same error.

- A Windows 10 VM does not suffer from those issues. Rebooting/Shutting-Down
this VM works without issues / host-reboot

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[Bug 96243] GPU initialization fails when running in VM

[bugzilla-daemon]

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

John Bridgman <john.bridgman@amd.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|GPU initialization fails    |GPU initialization fails
                   |                            |when running in VM

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[Bug 96243] GPU initialization fails when running in VM

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

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Can you try a newer kernel?

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[Bug 96243] GPU initialization fails when running in VM

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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.

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[Bug 96243] GPU initialization fails when running in VM

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

--- Comment #3 from hiwatari.seiji@gmail.com ---
Created attachment 135114
  --> https://bugs.freedesktop.org/attachment.cgi?id=135114&action=edit
boot_log_successfull_initialization

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[Bug 96243] GPU initialization fails when running in VM

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

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #4 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/75.

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