Re: [PATCH v2 1/1] iommu/arm-smmu: Log CBFRSYNRA register on context fault

From: Will Deacon
Date: Tue Apr 23 2019 - 07:19:44 EST


On Mon, Apr 22, 2019 at 12:40:36PM +0530, Vivek Gautam wrote:
> Bits[15:0] in CBFRSYNRA register contain information about
> StreamID of the incoming transaction that generated the
> fault. Dump CBFRSYNRA register to get this info.
> This is specially useful in a distributed SMMU architecture
> where multiple masters are connected to the SMMU.
> SID information helps to quickly identify the faulting
> master device.
>
> Signed-off-by: Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> ---
>
> Changes since v1:
> - Addressed review comments, given by Bjorn, for nits.

Thanks, applied with minor fixup from Robin and Acks.

Will