[PATCH v2 0/5] Add Intel VT-d nested translation

[Yi Liu]

This is to add Intel VT-d nested translation based on IOMMUFD nesting
infrastructure. As the iommufd nesting infrastructure series[1], iommu
core supports new ops to report iommu hardware information, allocate
domains with user data and sync stage-1 IOTLB. The data required in
the three paths are vendor-specific, so

1) IOMMU_HW_INFO_TYPE_INTEL_VTD and struct iommu_device_info_vtd are
   defined to report iommu hardware information for Intel VT-d .
2) IOMMU_HWPT_DATA_VTD_S1 is defined for the Intel VT-d stage-1 page
   table, it will be used in the stage-1 domain allocation and IOTLB
   syncing path. struct iommu_hwpt_intel_vtd is defined to pass user_data
   for the Intel VT-d stage-1 domain allocation.
   struct iommu_hwpt_invalidate_intel_vtd is defined to pass the data for
   the Intel VT-d stage-1 IOTLB invalidation.

With above IOMMUFD extensions, the intel iommu driver implements the three
callbacks to support nested translation.

Complete code can be found in [2], QEMU could can be found in [3].

base-commit: f01f1c95684dd18c15dd0e51b4fd6e796a0a2c0e

[1] https://lore.kernel.org/linux-iommu/20230309080910.607396-1-yi.l.liu@xxxxxxxxx/
[2] https://github.com/yiliu1765/iommufd/tree/iommufd_nesting
[3] https://github.com/yiliu1765/qemu/tree/wip/iommufd_rfcv3%2Bnesting

Change log:
v2:
 - The iommufd infrastructure is split to be separate series.

v1: https://lore.kernel.org/linux-iommu/20230209043153.14964-1-yi.l.liu@xxxxxxxxx/

Regards,
        Yi Liu

Lu Baolu (4):
  iommu/vt-d: Implement hw_info for iommu capability query
  iommu/vt-d: Extend dmar_domain to support nested domain
  iommu/vt-d: Add helper to setup pasid nested translation
  iommu/vt-d: Add nested domain support

Yi Liu (1):
  iommufd: Add nesting related data structures for Intel VT-d

 drivers/iommu/intel/Makefile         |   2 +-
 drivers/iommu/intel/iommu.c          |  57 ++++++++---
 drivers/iommu/intel/iommu.h          |  51 ++++++++--
 drivers/iommu/intel/nested.c         | 143 +++++++++++++++++++++++++++
 drivers/iommu/intel/pasid.c          | 142 ++++++++++++++++++++++++++
 drivers/iommu/intel/pasid.h          |   2 +
 drivers/iommu/iommufd/hw_pagetable.c |   7 +-
 drivers/iommu/iommufd/main.c         |   5 +
 include/uapi/linux/iommufd.h         | 136 +++++++++++++++++++++++++
 9 files changed, 522 insertions(+), 23 deletions(-)
 create mode 100644 drivers/iommu/intel/nested.c

-- 
2.34.1