[Bug 111455] DMAR: [INTR-REMAP] Blocked an interrupt request due to source-id verification failure

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111455

            Bug ID: 111455
           Summary: DMAR: [INTR-REMAP] Blocked an interrupt request due to
                    source-id verification failure
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: not set
          Priority: not set
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: nikolay at oldum.net

Hello team,
the below error is printed in the log and causes the graphics driver to freeze:

[Tue Aug 20 12:04:38 2019] DMAR: DRHD: handling fault status reg 2
[Tue Aug 20 12:04:38 2019] DMAR: [INTR-REMAP] Request device [00:00.0] fault
index 26 [fault reason 38] Blocked an interrupt request due to source-id
verification failure
[Tue Aug 20 12:04:38 2019] [drm] Fence fallback timer expired on ring gfx
[Tue Aug 20 12:04:38 2019] [drm] Fence fallback timer expired on ring gfx
[Tue Aug 20 12:04:39 2019] [drm] Fence fallback timer expired on ring gfx
[Tue Aug 20 12:04:39 2019] [drm] Fence fallback timer expired on ring gfx
[Tue Aug 20 12:04:40 2019] [drm] Fence fallback timer expired on ring gfx
[Tue Aug 20 12:04:40 2019] [drm] Fence fallback timer expired on ring sdma0
[Tue Aug 20 12:04:41 2019] [drm] Fence fallback timer expired on ring sdma0
...

Hardware is: Dell Precision Tower 5810 with Advanced Micro Devices, Inc.
[AMD/ATI] Oland GL [FirePro W2100] video card.

Kernel: 5.2.8 x86_64 (GNU/Gentoo Linux)
Kernel Command line: BOOT_IMAGE=/kernel-genkernel-x86_64-5.2.8-gentoo
root=/dev/mapper/root ro crypt_root=UUID=e11887f5-4104-4a9e-9c53-7e1d904a0b28
root_trim=no elevator=bfq scsi_mod.use_blk_mq=1 libata.allow_tpm=1 domdadm
dolvm intel_iommu=on

IOMMU is on, because the system acts mainly as a KVM/Libvirt host.

amdgpu driver information:
# dmesg | grep amd
[   14.614307] [drm] amdgpu kernel modesetting enabled.
[   14.615206] amdgpu 0000:03:00.0: remove_conflicting_pci_framebuffers: bar 0:
0xe0000000 -> 0xefffffff
[   14.615208] amdgpu 0000:03:00.0: remove_conflicting_pci_framebuffers: bar 2:
0xf7e00000 -> 0xf7e3ffff
[   14.615209] amdgpu 0000:03:00.0: vgaarb: deactivate vga console
[   14.617260] amdgpu 0000:03:00.0: kfd not supported on this ASIC
[   14.622071] amdgpu 0000:03:00.0: No more image in the PCI ROM
[   14.624585] amdgpu 0000:03:00.0: VRAM: 2048M 0x000000F400000000 -
0x000000F47FFFFFFF (2048M used)
[   14.624586] amdgpu 0000:03:00.0: GART: 1024M 0x000000FF00000000 -
0x000000FF3FFFFFFF
[   14.626166] [drm] amdgpu: 2048M of VRAM memory ready
[   14.626169] [drm] amdgpu: 3072M of GTT memory ready.
[   14.626832] amdgpu 0000:03:00.0: PCIE GART of 1024M enabled (table at
0x000000F400900000).
[   14.643922] [drm] amdgpu: dpm initialized
[   14.862039] fbcon: amdgpudrmfb (fb0) is primary device
[   14.990216] amdgpu 0000:03:00.0: fb0: amdgpudrmfb frame buffer device
[   15.260648] [drm] Initialized amdgpu 3.32.0 20150101 for 0000:03:00.0 on
minor 0

and module dependencies:
# lsmod | grep amdgpu
amdgpu               3772416  7
gpu_sched              36864  1 amdgpu
ttm                   114688  1 amdgpu
drm_kms_helper        212992  1 amdgpu
drm                   462848  7 gpu_sched,drm_kms_helper,amdgpu,ttm
i2c_algo_bit           16384  2 igb,amdgpu

Happy to collect output from 'drm.debug=0x1e log_buf_len=4M' booted kernel if
that makes sense.

Thanks,
-Nikolay

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