[Bug 1874504] [NEW] VFIO passthrough spits out thousands of messages

[Graeme Brett Houston BSc]

Public bug reported:

started qemu as:
sudo qemu-system-sparc64 -device vfio-pci,host=0b:05.0,x-no-mmap=on,bus=pciB

messages received thousands of times:

qemu-system-sparc64: -device vfio-pci,host=0b:05.0,x-no-mmap=on,bus=pciB: iommu 
has granularity incompatible with target AS
qemu-system-sparc64: -device vfio-pci,host=0b:05.0,x-no-mmap=on,bus=pciB: iommu 
map to non memory area 4079c000

qemu version (think telling a lie as sure its 5.0)
QEMU emulator version 4.2.92
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers

pci device being passed through:

0b:05.0 Display controller [0380]: 3DLabs Permedia II 2D+3D [3d3d:0009] (rev 01)
        Subsystem: Tech-Source Permedia II 2D+3D [1227:0006]
        Flags: medium devsel, IRQ 11
        Memory at 83000000 (32-bit, non-prefetchable) [disabled] [size=128K]
        Memory at 82800000 (32-bit, non-prefetchable) [disabled] [size=8M]
        Memory at 82000000 (32-bit, non-prefetchable) [disabled] [size=8M]
        Expansion ROM at 83020000 [disabled] [size=64K]
        Capabilities: <access denied>
        Kernel driver in use: vfio-pci

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: sparc64 vfio

** Attachment added: "output.txt"
   https://bugs.launchpad.net/bugs/1874504/+attachment/5358566/+files/output.txt

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https://bugs.launchpad.net/bugs/1874504

Title:
  VFIO passthrough spits out thousands of messages

Status in QEMU:
  New

Bug description:
  started qemu as:
  sudo qemu-system-sparc64 -device vfio-pci,host=0b:05.0,x-no-mmap=on,bus=pciB

  messages received thousands of times:

  qemu-system-sparc64: -device vfio-pci,host=0b:05.0,x-no-mmap=on,bus=pciB: 
iommu has granularity incompatible with target AS
  qemu-system-sparc64: -device vfio-pci,host=0b:05.0,x-no-mmap=on,bus=pciB: 
iommu map to non memory area 4079c000

  qemu version (think telling a lie as sure its 5.0)
  QEMU emulator version 4.2.92
  Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers

  pci device being passed through:

  0b:05.0 Display controller [0380]: 3DLabs Permedia II 2D+3D [3d3d:0009] (rev 
01)
        Subsystem: Tech-Source Permedia II 2D+3D [1227:0006]
        Flags: medium devsel, IRQ 11
        Memory at 83000000 (32-bit, non-prefetchable) [disabled] [size=128K]
        Memory at 82800000 (32-bit, non-prefetchable) [disabled] [size=8M]
        Memory at 82000000 (32-bit, non-prefetchable) [disabled] [size=8M]
        Expansion ROM at 83020000 [disabled] [size=64K]
        Capabilities: <access denied>
        Kernel driver in use: vfio-pci

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