The Intel iommu driver will now use the domain_alloc_paging callback and
remove the legacy domain_alloc callback. This ensures that a valid
device pointer is provided whenever a paging domain is allocated, and
all dmar_domain attributes can be set up at the time of allocation.

Both first-stage and second-stage page tables can be used for a paging
domain. Unless IOMMU_HWPT_ALLOC_NEST_PARENT or
IOMMU_HWPT_ALLOC_DIRTY_TRACKING is specified during paging domain
allocation, this driver will try to use first-stage page tables if the
hardware is capable. This is assuming that the first-stage page table is
compatible with both the host and guest kernels.

The whole series is also available on GitHub:
https://github.com/LuBaolu/intel-iommu/commits/vtd-domain_alloc_paging-v1

Please help review and comment.

Lu Baolu (7):
  iommu/vt-d: Add domain_alloc_paging support
  iommu/vt-d: Remove unused domain_alloc callback
  iommu/vt-d: Enhance compatibility check for paging domain attach
  iommu/vt-d: Remove domain_update_iommu_cap()
  iommu/vt-d: Remove domain_update_iommu_superpage()
  iommu/vt-d: Refactor first_level_by_default()
  iommu/vt-d: Refine intel_iommu_domain_alloc_user()

 drivers/iommu/intel/iommu.h |   1 -
 drivers/iommu/intel/iommu.c | 328 +++++++-----------------------------
 drivers/iommu/intel/pasid.c |  28 +--
 3 files changed, 62 insertions(+), 295 deletions(-)

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2.43.0