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ce0e3c403e
Add struct iova_allocator, which gives tests a convenient way to generate legally-accessible IOVAs to map. This allocator traverses the sorted available IOVA ranges linearly, requires power-of-two size allocations, and does not support freeing iova allocations. The assumption is that tests are not IOVA space-bounded, and will not need to recycle IOVAs. This is based on Alex Williamson's patch series for adding an IOVA allocator [1]. [1] https://lore.kernel.org/all/20251108212954.26477-1-alex@shazbot.org/ Reviewed-by: David Matlack <dmatlack@google.com> Tested-by: David Matlack <dmatlack@google.com> Signed-off-by: Alex Mastro <amastro@fb.com> Link: https://lore.kernel.org/r/20251111-iova-ranges-v3-3-7960244642c5@fb.com Signed-off-by: Alex Williamson <alex@shazbot.org>