The SVA iommu_domain represents a hardware pagetable that the IOMMU
hardware could use for SVA translation. This adds some infrastructures
to support SVA domain in the iommu core. It includes:

- Extend the iommu_domain to support a new IOMMU_DOMAIN_SVA domain
  type. The IOMMU drivers that support allocation of the SVA domain
  should provide its own SVA domain specific iommu_domain_ops.
- Add a helper to allocate an SVA domain. The iommu_domain_free()
  is still used to free an SVA domain.

The report_iommu_fault() should be replaced by the new
iommu_report_device_fault(). Leave the existing fault handler with the
existing users and the newly added SVA members excludes it.
Suggested-by: NJean-Philippe Brucker <jean-philippe@linaro.org>
Suggested-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: NJean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: NKevin Tian <kevin.tian@intel.com>
Reviewed-by: NJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: NYi Liu <yi.l.liu@intel.com>
Tested-by: NZhangfei Gao <zhangfei.gao@linaro.org>
Tested-by: NTony Zhu <tony.zhu@intel.com>
Link: https://lore.kernel.org/r/20221031005917.45690-7-baolu.lu@linux.intel.comSigned-off-by: NJoerg Roedel <jroedel@suse.de>