Allow device drivers and VFIO to get notified on IOMMU translation
fault, and handle recoverable faults (PCI PRI). Several series require
this API (Intel VT-d and Arm SMMUv3 nested support, as well as the
generic host SVA implementation).
Changes since v1 [1]:
* Allocate iommu_param earlier, in iommu_probe_device().
* Pass struct iommu_fault to fault handlers, instead of the
iommu_fault_event wrapper.
* Removed unused iommu_fault_event::iommu_private.
* Removed unnecessary iommu_page_response::addr.
* Added iommu_page_response::version, which would allow to introduce a
new incompatible iommu_page_response structure (as opposed to just
adding a flag + field).
[1] [PATCH 0/4] iommu: Add device fault reporting API
https://lore.kernel.org/lkml/20190523180613.55049-1-jean-philippe.bruc...@arm.com/
Jacob Pan (3):
driver core: Add per device iommu param
iommu: Introduce device fault data
iommu: Introduce device fault report API
Jean-Philippe Brucker (1):
iommu: Add recoverable fault reporting
drivers/iommu/iommu.c | 236 ++++++++++++++++++++++++++++++++++++-
include/linux/device.h | 3 +
include/linux/iommu.h | 87 ++++++++++++++
include/uapi/linux/iommu.h | 153 ++++++++++++++++++++++++
4 files changed, 476 insertions(+), 3 deletions(-)
create mode 100644 include/uapi/linux/iommu.h
--
2.21.0
