Re: [PATCH v7 0/5] of_iommu: add support for "iommu-ranges"

[Vinayak Katoch <vinayak.katoch@oss.qualcomm.com>]

On Fri, Nov 06, 2026 at 10:44:23PM +0530, Vikash Garodia wrote:
> The series adds support for recently introduced property 
> "iommu-ranges". It adds the required checks to error out for cases 
> which are not following the schema definition.
> 
> Iommu-ranges was defined in schema with this PR
> https://github.com/devicetree-org/dt-schema/pull/207
> 
> The patch series is being posted as revision v6, since the patches 
> were initially part of the media series [1]. The patches are moved out 
> to get review comments from iommu reviewers, which was otherwise looking 
> as a media series. Happy to move this back to media series if anyone have 
> any concerns. 
> [1] 
> https://lore.kernel.org/linux-media/20260926-vpu_iommu_iova_handling-v5-0-0322ca5dc10c@oss.qualcomm.com/
> 
> Signed-off-by: Vikash Garodia <vikash.garodia@oss.qualcomm.com>
> ---
> Changes in v7:
> - Move the "iommu-addresses" behaviour change ("reg" required, non-direct
>   mappings rejected) into its own patch before the iommu-ranges patch (Bryan)
> - Make OF_IOMMU depend on OF_ADDRESS and drop the #if guards (Rob)
> - Use resource_size_t for the size in vfio_find_dma() (Sashiko)
> - End the derived trailing reserved region at PHYS_ADDR_MAX - 1 to avoid
>   overflow (Sashiko)
> - Add a dma-iommu fix to protect the IOVA rbtree anchor on 32-bit with
>   64-bit dma_addr_t (Sashiko)
> - Use the "iommu/of:" prefix and fix the subject case
> - Link to v6: https://lore.kernel.org/r/20261103-add_iommu_ranges-v6-0-361f3921a133@oss.qualcomm.com
> 
> Changes in v6:
> - Addressed sashiko comments.
> - Addressed comment from Bryan.
> - Link to v5: https://lore.kernel.org/all/20260926-vpu_iommu_iova_handling-v5-4-0322ca5dc10c@oss.qualcomm.com/
> 
> ---
> Vikash Garodia (5):
>       iommu/dma: Keep reserved regions below the IOVA rbtree anchor
>       iommu: Use resource_size_t for reserved region length
>       iommu/of: Make OF_IOMMU depend on OF_ADDRESS
>       iommu/of: Require reg for iommu-addresses
>       iommu/of: Add support for "iommu-ranges" on a device node
> 
>  drivers/iommu/Kconfig           |   2 +-
>  drivers/iommu/amd/iommu.c       |   2 +-
>  drivers/iommu/dma-iommu.c       |  32 +++++----
>  drivers/iommu/intel/iommu.c     |   2 +-
>  drivers/iommu/iommu.c           |   2 +-
>  drivers/iommu/of_iommu.c        | 147 ++++++++++++++++++++++++++++++++++------
>  drivers/iommu/virtio-iommu.c    |   2 +-
>  drivers/of/address.c            |   2 +-
>  drivers/vfio/vfio_iommu_type1.c |   2 +-
>  include/linux/iommu.h           |   4 +-
>  include/linux/of_address.h      |   2 +-
>  11 files changed, 155 insertions(+), 44 deletions(-)
> ---
> base-commit: 2637bdec0535a2044cd830eba9a79363651d9043
> change-id: 20261103-add_iommu_ranges-549cf3fb0867
> 
> Best regards,
> -- 
> Vikash Garodia <vikash.garodia@oss.qualcomm.com>
> 
FYI, we need this series too, for the extended mapping support [1] in
the fastrpc driver. I'll be posting a new version of that series soon.
[1] https://lore.kernel.org/all/20261007-extended-mapping-v2-0-5dca3aa2c2d3@oss.qualcomm.com/