On Tue, May 19, 2026 at 11:45:55AM +0530, Ekansh Gupta via B4 Relay wrote: > From: Ekansh Gupta <[email protected]> > > 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-4-6-sonnet > Signed-off-by: Ekansh Gupta <[email protected]> > --- > drivers/iommu/iommu.c | 4 ++++ > 1 file changed, 4 insertions(+) >
Reviewed-by: Dmitry Baryshkov <[email protected]> -- With best wishes Dmitry
