[PATCH 0/3] Fix UNMAP notifier for intel-iommu

[Jason Wang]

Hi All:

According to ATS, device should work if ATS is disabled. This is not
correctly implemented in the current intel-iommu since it doesn't
handle the UNMAP notifier correctly. This breaks the vhost-net +
vIOMMU without dt.

The root casue is that the when there's a device IOTLB miss (note that
it's not specific to PCI so it can work without ATS), Qemu doesn't
build the IOVA tree, so when guest start an IOTLB invalidation, Qemu
won't trigger the UNMAP notifier.

Fixing by build IOVA tree during IOMMU translsation.

Thanks

Jason Wang (3):
  intel-iommu: fail MAP notifier without caching mode
  intel-iommu: fail DEVIOTLB_UNMAP without dt mode
  intel-iommu: build iova tree during IOMMU translation

 hw/i386/intel_iommu.c | 58 ++++++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 25 deletions(-)

-- 
2.25.1