iommufd/selftest: Test IOMMU_HWPT_GET_DIRTY_BITMAP

mainline inclusion
from mainline-v6.7-rc1
commit a9af47e382a4d517685cb13c780272e7f300ebc5
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8Y6AM
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?a9af47e382a4d517685cb13c780272e7f300ebc5

--------------------------------

Add a new test ioctl for simulating the dirty IOVAs in the mock domain, and
implement the mock iommu domain ops that get the dirty tracking supported.

The selftest exercises the usual main workflow of:

1) Setting dirty tracking from the iommu domain
2) Read and clear dirty IOPTEs

Different fixtures will test different IOVA range sizes, that exercise
corner cases of the bitmaps.

Intel-SIG: a9af47e382a4 iommufd/selftest: Test IOMMU_HWPT_GET_DIRTY_BITMAP
Backport IOMMUFD Dirty Tracking

Link: https://lore.kernel.org/r/20231024135109.73787-17-joao.m.martins@oracle.com


Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
[ jz: amend commit log ]
Signed-off-by: Jason Zeng <jason.zeng@intel.com>