[RFC PATCH 0/6] iommu_pgsize() improvements to help towards ->[un]map_pages()

[Will Deacon]

Hi Isaac,

I had a go at removing the loop you have in pgsize_bitmap() over at:

https://lore.kernel.org/r/20210331030042.13348-4-isaacm@codeaurora.org

and I ended up with this. It's _very_ lightly tested, but I thought it
might be useful to you, especially if you're going to be adding support
for '->map_pages' as well.

Cheers,

Will

Cc: "Isaac J. Manjarres" <isaacm at codeaurora.org>
Cc: Pratik Patel <pratikp at codeaurora.org>
Cc: Robin Murphy <robin.murphy at arm.com>
Cc: Lu Baolu <baolu.lu at linux.intel.com>

--->8

Isaac J. Manjarres (2):
  iommu/io-pgtable: Introduce unmap_pages() as a page table op
  iommu: Add an unmap_pages() op for IOMMU drivers

Will Deacon (4):
  iommu: Use bitmap to calculate page size in iommu_pgsize()
  iommu: Split 'addr_merge' argument to iommu_pgsize() into separate
    parts
  iommu: Hook up '->unmap_pages' driver callback
  iommu: Accomodate larger pages in iommu_pgsize() 'count' calculation

 drivers/iommu/iommu.c      | 87 +++++++++++++++++++++++++++-----------
 include/linux/io-pgtable.h |  4 ++
 include/linux/iommu.h      |  4 ++
 3 files changed, 70 insertions(+), 25 deletions(-)

-- 
2.31.0.291.g576ba9dcdaf-goog