Re: [PATCH v5 04/13] iommu: of_iommu: Add support for "iommu-ranges" on a device node

[Vikash Garodia]

Hello Joerg , Will, Murphy,

On 9/26/2026 12:04 PM, Vikash Garodia wrote:
> Reserving an IOVA address using "iommu-addresses" requires it to be
> placed in the reserved-memory node. But when "iommu-addresses" is the
> only property being described and there is no backing "reg" (i.e. no
> actual reserved system memory), it does not really belong under
> /reserved-memory. A device IOVA range is specific to its own address
> space, and does not describe the system physical memory to make it
> qualify under reserved-memory. Given this, place "iommu-addresses"
> inside reserved-memory only when it is paired with a "reg", otherwise,
> define it within the device own node. It was discussed here:
> https://lore.kernel.org/all/662f7093-fb0a-4564-9ca0-98e03e68ba9a@xxxxxxxxxx
>
> Existing "iommu-addresses" property expects a phandle, which does
> not make sense when the property is defined within the device node.
> Introduce a new property, "iommu-ranges", to specify the device
> specific IOVA ranges when there is no backing "reg".
>
> Suggested-by: Rob Herring<robh@xxxxxxxxxx>
> Co-developed-by: Vishnu Reddy<busanna.reddy@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vishnu Reddy<busanna.reddy@xxxxxxxxxxxxxxxx>
> Signed-off-by: Vikash Garodia<vikash.garodia@xxxxxxxxxxxxxxxx>
> ---
>   drivers/iommu/of_iommu.c | 128 ++++++++++++++++++++++++++++++++++++++++++++---
>   1 file changed, 121 insertions(+), 7 deletions(-)

Do you see this patch getting into 7.4 ? Or, you have any other comments 
on this patch ?

If you are ok with this patch, maybe it would be a good idea to have the 
series applied by media maintainer.

Regards,
Vikash