[Bug 107612] [Vega10] Hard Lock [gfxhub] VMC page fault when opening Mario Kart 8 in Cemu under wine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107612

            Bug ID: 107612
           Summary: [Vega10] Hard Lock [gfxhub] VMC page fault when
                    opening Mario Kart 8 in Cemu under wine
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: mesa at suchmail.net
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 141181
  --> https://bugs.freedesktop.org/attachment.cgi?id=141181&action=edit
dmesg log mdgpu 0000:0c:00.0: VM_L2_PROTECTION_FAULT_STATUS:0x00000000

Given
Trying to run Mario Kart 8 in Cemu under wine with a Vega 56 or 64,

When
Opening the game (US or EUR, I have EUR, other people have tested US),

Then
The system freezes once the Mario Kart 8 splash screen shows up. Keyboard/Mouse
input is gone, only ssh sessions remain open until the system is hard-rebooted.
There is no other way to recover from this.

This can be reproduced every time with a Vega64 or Vega56 card. It has been an
issue since at least kernel 4.15, mesa 18.0.

I have tested on 2 systems, and several people with Vega cards get this issue
(works for nobody).

uname -a
Linux nihonium2 4.18.1-arch1-1-ARCH #1 SMP PREEMPT Wed Aug 15 21:11:55 UTC 2018
x86_64 GNU/Linux

I'm running antergos with mesa-git, fully up to date.
dmesg, glxinfo are attached.

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