linux-kernel - Re: [PATCHv3] iommu/arm-smmu-qcom: Add debug support for TLB sync timeouts

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Date:   Fri,  8 Jul 2022 14:55:53 +0100
From:   Will Deacon <will@...nel.org>
To:     Sai Prakash Ranjan <quic_saipraka@...cinc.com>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3] iommu/arm-smmu-qcom: Add debug support for TLB sync timeouts

On Fri, 8 Jul 2022 15:12:30 +0530, Sai Prakash Ranjan wrote:
> TLB sync timeouts can be due to various reasons such as TBU power down
> or pending TCU/TBU invalidation/sync and so on. Debugging these often
> require dumping of some implementation defined registers to know the
> status of TBU/TCU operations and some of these registers are not
> accessible in non-secure world such as from kernel and requires SMC
> calls to read them in the secure world. So, add this debug support
> to dump implementation defined registers for TLB sync timeout issues.
> 
> [...]

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/arm-smmu-qcom: Add debug support for TLB sync timeouts
      https://git.kernel.org/will/c/b9b721d117e9

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev