GPU hang while using kvmgt

Submitted by velde666@gmail.com

Assigned to Intel GFX Bugs mailing list

Link to original bug (#110951)

Description

Created attachment 144598
GPU crash dump

Hi there,

I am running CentOS 7 on an Intel NUC7i3BNH with with KVM/QEMU using GPU virtualization passthrough to a Windows 10 VM.

Kernel is 5.1.9 compiled with merged configs from standard CentOS kernel 3.10.x and 5.1.9 kernel-ml from elrepo-kernel.

I am getting random bluescreen in Windows (also with standard CentOS 3.10.x kernels) and kernel messages containing "gvt: guest page write error" and "gvt: vgpu(1) Invalid FORCE_NONPRIV write" and "gvt: vgpu 1: fail: spt" and "gvt: vgpu 1: fail: shadow page" and others as well as

Jun 16 13:38:30 floor13 kernel: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Jun 16 13:38:30 floor13 kernel: [drm] Please file a new bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Jun 16 13:38:30 floor13 kernel: [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Jun 16 13:38:30 floor13 kernel: [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Jun 16 13:38:30 floor13 kernel: [drm] GPU crash dump saved to /sys/class/drm/card0/error

which is why I am here :)

I will attach kernel messages containing gvt stuff as well as the GPU crash dump.

Thanks in advance for your much appereciated work!

Alex

Attachment 144598, "GPU crash dump":
i915.error