[v2] ARM SMMUv3: Fix spurious notification errors and stall with vfio-pci

[Qemu-devel] [PATCH v2 0/6] ARM SMMUv3: Fix spurious notification errors and stall with vfio-pci

Eric Auger posted 6 patches 4 years, 10 months ago

Diff against v1
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git fetch https://github.com/patchew-project/qemu tags/patchew/20190701093034.18873-1-eric.auger@redhat.com

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Alex Williamson <alex.williamson@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Eric Auger <eric.auger@redhat.com>

hw/arm/smmuv3-internal.h |  1 +
hw/arm/smmuv3.c          | 26 ++++++++++++++++++++------
hw/vfio/common.c         |  7 ++++++-
include/exec/memory.h    | 13 ++-----------
memory.c                 |  9 ---------
5 files changed, 29 insertions(+), 27 deletions(-)

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[Qemu-devel] [PATCH v2 0/6] ARM SMMUv3: Fix spurious notification errors and stall with vfio-pci

Posted by Eric Auger 4 years, 10 months ago

This series fixes the guest stall observed when attempting to run
a guest exposed with a SMMUv3 and a VFIO-PCI device. As a reminder
SMMUv3 is not yet integrated with VFIO (the device will not work
properly) but this shouldn't prevent the guest from booting.

It also silences some spurious translation configuration decoding
errors (STE out of span or invalid STE) that may happen on guest IOVA
invalidation notifications.

Best Regards

Eric

History:

v1 -> v2:
- Added "memory: Remove unused memory_region_iommu_replay_all()" &
  "hw/arm/smmuv3: Log a guest error when decoding an invalid STE"
- do not attempt to implement replay Cb but rather remove the call
  in case it is not needed
- explain why we do not remove other log messages on config decoding

Eric Auger (6):
  memory: Remove unused memory_region_iommu_replay_all()
  memory: Add IOMMU_ATTR_VFIO_NESTED IOMMU memory region attribute
  hw/vfio/common: Do not replay IOMMU mappings in nested case
  hw/arm/smmuv3: Advertise VFIO_NESTED
  hw/arm/smmuv3: Log a guest error when decoding an invalid STE
  hw/arm/smmuv3: Remove spurious error messages on IOVA invalidations

 hw/arm/smmuv3-internal.h |  1 +
 hw/arm/smmuv3.c          | 26 ++++++++++++++++++++------
 hw/vfio/common.c         |  7 ++++++-
 include/exec/memory.h    | 13 ++-----------
 memory.c                 |  9 ---------
 5 files changed, 29 insertions(+), 27 deletions(-)

-- 
2.20.1