https://bugs.freedesktop.org/show_bug.cgi?id=109403
--- Comment #3 from Andrey Grodzovsky andrey.grodzovsky@amd.com --- Hey, can you check if adding amdgpu.vm_debug=1 makes the VMC page faults disappear ?
Regarding the hang you see while doing GPU reset - please provide dmesg for this but with command line parameter of drm.debug=0xff - you also probably should open another ticket for this specific issue.