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authorJacob Pan2019-06-03 15:57:48 +0100
committerJoerg Roedel2019-06-12 10:19:06 +0200
commit0c830e6b32826311fc2b9ea1f4679be0f4ef0933 (patch)
treeb6ce1ef8a4dc2b82bf53f45fff1c77c82426f43c /scripts/checkstack.pl
parent4e32348ba5269aac1165f496b78189201568dd8c (diff)
iommu: Introduce device fault report API
Traditionally, device specific faults are detected and handled within their own device drivers. When IOMMU is enabled, faults such as DMA related transactions are detected by IOMMU. There is no generic reporting mechanism to report faults back to the in-kernel device driver or the guest OS in case of assigned devices. This patch introduces a registration API for device specific fault handlers. This differs from the existing iommu_set_fault_handler/ report_iommu_fault infrastructures in several ways: - it allows to report more sophisticated fault events (both unrecoverable faults and page request faults) due to the nature of the iommu_fault struct - it is device specific and not domain specific. The current iommu_report_device_fault() implementation only handles the "shoot and forget" unrecoverable fault case. Handling of page request faults or stalled faults will come later. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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