Re: [PATCH 2] Register read and writes tracing
From: Florian Fainelli <f.fainelli@gmail.com>
Date: 2020-11-06 03:58:38
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linux-arm-msm, lkml
On 11/5/2020 6:56 PM, Prasad Sodagudi wrote:
This patch series adds register read/write event tracing support. Qualcomm team tried upstreaming the register trace buffer solution - [1] with pstore and dynamic debug feature but that patch series didn't merge. I have followed Steve suggestion from -[2] and used tracepoint_enabled() API. [1] - https://patchwork.kernel.org/project/linux-arm-msm/cover/cover.1536430404.git.saiprakash.ranjan@codeaurora.org/ [2] - https://lore.kernel.org/lkml/20200928105501.7e29df65@oasis.local.home/ (local) Qualcomm teams uses these logs for debugging various issues in the product life cycle and hopping that this logging would help other silicon vendors as this is generic approach.
There is not anything arm64 specific here other than where you have hooked into the low-level I/O accessors, you could consider adding this as a generic facility to other architectures as well. Also, have you looked at making mmiotrace less x86 specific and more generic? -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel