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Similar to iommu_report_device_fault, this allows IOMMU drivers to report vIOMMU events from threaded IRQ handlers to user space hypervisors. Link: https://patch.msgid.link/r/44be825042c8255e75d0151b338ffd8ba0e4920b.1741719725.git.nicolinc@nvidia.com Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>