Re: [PATCH v10 1/7] iommu/arm: Introduce iommu_add_dt_pci_sideband_ids API

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 29 Apr 2025, Mykyta Poturai wrote:
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> 
> The main purpose of this patch is to add a way to register PCI device
> (which is behind the IOMMU) using the generic PCI-IOMMU DT bindings [1]
> before assigning that device to a domain.
> 
> This behaves similarly to the existing iommu_add_dt_device API, except it
> handles PCI devices, and it is to be invoked from the add_device hook in the
> SMMU driver.
> 
> The function dt_map_id to translate an ID through a downstream mapping
> (which is also suitable for mapping Requester ID) was borrowed from Linux
> (v5.10-rc6) and updated according to the Xen code base.
> 
> [1] 
> https://www.kernel.org/doc/Documentation/devicetree/bindings/pci/pci-iommu.txt
> 
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
> Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>