[Bug 208647] New: persistent amdgpu: [mmhub] page faults

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=208647

            Bug ID: 208647
           Summary: persistent amdgpu: [mmhub] page faults
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.4.0-42-generic
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: jay.foad at gmail.com
        Regression: No

Whenever X is running I get persistent page faults like this:

Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu: [mmhub] page fault (src_id:0 ring:169 vmid:0 pasid:0, for process  pid
0 thread  pid 0)
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:   in page starting at address 0x00000000fffb0000 from client 18
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu: GCVM_L2_PROTECTION_FAULT_STATUS:0x00041F52
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:          Faulty UTCL2 client ID: 0xf
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:          MORE_FAULTS: 0x0
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:          WALKER_ERROR: 0x1
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:          PERMISSION_FAULTS: 0x5
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:          MAPPING_ERROR: 0x1
Jul 21 15:19:16 jay-X470-AORUS-ULTRA-GAMING kernel: amdgpu 0000:0c:00.0:
amdgpu:          RW: 0x1

Sometimes I get several of these per second. Sometimes there are none for a few
minutes.

If I boot into runlevel 3 (i.e. without starting X) I get one of these during
boot, but then there are no more after that.

I'm running Ubuntu 20.04 but I also saw this on 18.04.

Kernel version is 5.4.0-42-generic but I also saw this with 5.3.0-51-generic.

I'm using the amdgpu-pro drivers.

Graphics card is a Navi 10.

Motherboard is a Gigabyte X470 AORUS ULTRA GAMING.

CPU is an AMD Ryzen 9 3900X.

A very similar sounding bug was reported here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1888116

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