iommu/arm-smmu-v3: Report events that belong to devices attached to vIOMMU

iommu/arm-smmu-v3: Report events that belong to devices attached to vIOMMU

Aside from the IOPF framework, iommufd provides an additional pathway to
report hardware events, via the vEVENTQ of vIOMMU infrastructure.

Define an iommu_vevent_arm_smmuv3 uAPI structure, and report stage-1 events
in the threaded IRQ handler. Also, add another four event record types that
can be forwarded to a VM.

Link: https://patch.msgid.link/r/5cf6719682fdfdabffdb08374cdf31ad2466d75a.1741719725.git.nicolinc@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>