linux-kernel - Re: (subset) [PATCH V4 00/11] Fix XPU violation during modem metadata authentication

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Message-Id: <167409986459.3039214.14669304455685242733.b4-ty@kernel.org>
Date:   Wed, 18 Jan 2023 21:44:28 -0600
From:   Bjorn Andersson <andersson@...nel.org>
To:     quic_sibis@...cinc.com, Manivannan Sadhasivam <mani@...nel.org>
Cc:     regressions@...mhuis.info, linux-kernel@...r.kernel.org,
        konrad.dybcio@...ainline.org, will@...nel.org,
        robin.murphy@....com, catalin.marinas@....com,
        devicetree@...r.kernel.org, krzysztof.kozlowski+dt@...aro.org,
        sumit.semwal@...aro.org, amit.pundir@...aro.org,
        robh+dt@...nel.org, agross@...nel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: (subset) [PATCH V4 00/11] Fix XPU violation during modem metadata authentication

On Tue, 17 Jan 2023 14:28:29 +0530, Sibi Sankar wrote:
> The memory region allocated using dma_alloc_attr with no kernel mapping
> attribute set would still be a part of the linear kernel map. Any access
> to this region by the application processor after assigning it to the
> remote Q6 will result in a XPU violation. Fix this by replacing the
> dynamically allocated memory region with a no-map carveout and unmap the
> modem metadata memory region before passing control to the remote Q6.
> The addition of the carveout and memunmap is required only on SoCs that
> mandate memory protection before transferring control to Q6, hence the
> driver falls back to dynamic memory allocation in the absence of the
> modem metadata carveout.
> 
> [...]

Applied, thanks!

[01/11] dt-bindings: remoteproc: qcom,q6v5: Move MSM8996 to schema
        commit: bdea142295ffd76aaec2a90a36ba09ad19660686
[02/11] dt-bindings: remoteproc: qcom,msm8996-mss-pil: Update memory region
        commit: 9b3024247b2ddea6880fa77b638c870ddbdb6bba
[03/11] dt-bindings: remoteproc: qcom,sc7180-mss-pil: Update memory-region
        commit: 95864f27330674c970c84b81ae791182de150b0f
[04/11] dt-bindings: remoteproc: qcom,sc7280-mss-pil: Update memory-region
        commit: eb48137d783b4c845c7b081e32a73666326dcbb3
[05/11] Revert "remoteproc: qcom_q6v5_mss: map/unmap metadata region before/after use"
        commit: a899d542b687c9b04ccbd9eefabc829ba5fef791
[06/11] remoteproc: qcom_q6v5_mss: Use a carveout to authenticate modem headers
        commit: 57f72170a2b2a362c35bb9407fc844eac5afdec1

Best regards,
-- 
Bjorn Andersson <andersson@...nel.org>