Re: [PATCH v2 05/15] iommu: Add QDA compute context bank bus to iommu_buses

["Joerg Roedel (AMD)" <joro@8bytes.org>]

On Mon, Aug 17, 2026 at 10:17:40AM +0530, Ekansh Gupta wrote:
> Register the QDA compute context bank bus (qda-compute-cb) with the
> IOMMU subsystem by adding it to the iommu_buses[] array.
> 
> The QDA driver creates synthetic devices on this bus to represent
> IOMMU context banks (CBs). Each CB device needs its own IOMMU domain
> so that the DSP memory manager can enforce per-session address space
> isolation. Without this registration, the IOMMU subsystem does not
> probe CB devices for IOMMU groups and of_dma_configure() in the bus
> dma_configure callback has no IOMMU domain to attach to.
> 
> Assisted-by: Claude:claude-sonnet-5
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> Signed-off-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
> ---
>  drivers/iommu/iommu.c | 4 ++++
>  1 file changed, 4 insertions(+)

Acked-by: Joerg Roedel <joerg.roedel@amd.com>