Re: [PATCH v4 00/11] dmaengine: qcom: bam_dma: add cmd descriptor support

[Md Sadre Alam]

On 9/9/2024 2:56 PM, Md Sadre Alam wrote:
> Requirements:
>    In QCE crypto driver we are accessing the crypto engine registers
>    directly via CPU read/write. Trust Zone could possibly to perform some
>    crypto operations simultaneously, a race condition will be created and
>    this could result in undefined behavior.
>
>    To avoid this behavior we need to use BAM HW LOCK/UNLOCK feature on BAM
>    pipes, and this LOCK/UNLOCK will be set via sending a command descriptor,
>    where the HLOS/TZ QCE crypto driver prepares a command descriptor with a
>    dummy write operation on one of the QCE crypto engine register and pass
>    the LOCK/UNLOCK flag along with it.
>
>    This feature tested with tcrypt.ko and "libkcapi" with all the AES
>    algorithm supported by QCE crypto engine. Tested on IPQ9574 and
>    qcm6490.LE chipset.

Hi,

Could you please provide feedback for this patch series.

Thanks
Alam.