Re: [PATCH 3/5] soc: qcom: mdt_loader: add qcom_mdt_pas_map/unmap_devmem_rscs()

[Mukesh Ojha]

On Tue, May 26, 2026 at 09:47:27AM +0300, Dmitry Baryshkov wrote:
> On Wed, May 06, 2026 at 10:31:05AM +0530, Mukesh Ojha wrote:
> > Add qcom_mdt_pas_map_devmem_rscs() and qcom_mdt_pas_unmap_devmem_rscs()
> > to IOMMU map/unmap RSC_DEVMEM resource table entries on SoCs where Linux
> > runs as hypervisor at EL2 and owns the IOMMU mappings for remote
> > processors.
> 
> Generic rule is 'no API without users'. Please provide a driver using
> these functions.

All the non-remoteproc client will be the user., I already mentioned
that video is one of user mentioned in the cover-letter.., will add
them as user once there base changes get picked.

> 
> > 
> > The map function fetches the resource table via
> > qcom_scm_pas_get_rsc_table() and iterates over RSC_DEVMEM entries using
> > rsc_table_for_each_entry(), calling iommu_map() for each. Mapped entries
> > are tracked in a per-PAS linked list stored in a hash table keyed by
> > pas_id for later lookup by the unmap function.
> > 
> > Signed-off-by: Mukesh Ojha <mukesh.ojha@xxxxxxxxxxxxxxxx>
> > ---
> >  drivers/soc/qcom/mdt_loader.c       | 189 ++++++++++++++++++++++++++++
> >  include/linux/soc/qcom/mdt_loader.h |  22 ++++
> >  2 files changed, 211 insertions(+)
> > 
> 
> -- 
> With best wishes
> Dmitry

-- 
-Mukesh Ojha