Re: [PATCH net-next v3 1/2] dt-bindings: net: qcom,bam-dmux: Add memory-region and qcom,vmid properties

[Krzysztof Kozlowski <krzk@kernel.org>]

On Wed, Oct 21, 2026 at 12:09:43PM +0530, Vishnu Santhosh wrote:
> Some Qualcomm SoCs, such as Shikra, run the modem in a separate security
> domain with restricted access to system memory. BAM-DMUX DMA mappings
> must therefore be constrained to a designated region that can be shared
> with the modem.
> 
> Add an optional memory-region property to reference a restricted DMA
> pool used for BAM-DMUX mappings, and a qcom,vmid property to identify the
> remote execution environment that is granted access to the pool through
> SCM.
> 
> Require memory-region whenever qcom,vmid is specified.
> 
> Add the qcom,shikra-bam-dmux compatible, with qcom,bam-dmux as fallback,
> and require both properties for it.
> 
> Co-developed-by: Deepak Kumar Singh <deepak.singh@oss.qualcomm.com>
> Signed-off-by: Deepak Kumar Singh <deepak.singh@oss.qualcomm.com>
> Signed-off-by: Vishnu Santhosh <vishnu.santhosh@oss.qualcomm.com>
> ---
>  .../devicetree/bindings/net/qcom,bam-dmux.yaml     | 36 +++++++++++++++++++++-
>  1 file changed, 35 insertions(+), 1 deletion(-)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof