From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Bryan O'Donoghue <bod@kernel.org>, barnabas.czeman@mainlining.org
Cc: Bjorn Andersson <andersson@kernel.org>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Stephan Gerhold <stephan@gerhold.net>,
linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/9] remoteproc: qcom_q6v5_mss: Add MDM9607
Date: Fri, 2 Jan 2026 15:02:58 +0100 [thread overview]
Message-ID: <15e41ffe-66f1-43ec-b0af-241041c25f9d@oss.qualcomm.com> (raw)
In-Reply-To: <1dcc9380-c2c2-4263-93ad-71edce86b0da@kernel.org>
On 1/2/26 1:59 PM, Bryan O'Donoghue wrote:
> On 02/01/2026 12:00, Konrad Dybcio wrote:
>>> Is there an io-fabric in the world which exceeds 1 microsecond to perform a write transaction ?
>> Writes on arm64 aren't usually observable from the remote endpoint when
>> you would expect them to, they can be buffered unless there's an explicit
>> readback right afterwards (which creates a dependency that the processor
>> will fulfill)
>
> I don't mean write-combining cache, I mean posted versus non-posted writes which is a feature of the front-side-bus :)
Writes are posted (Device-nGnRE, note the E attribute is set)
https://documentation-service.arm.com/static/63a43e333f28e5456434e18b
Konrad
next prev parent reply other threads:[~2026-01-02 14:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-31 16:30 [PATCH v3 0/9] MDM9607/MSM8917/MSM8937/MSM8940 MSS Barnabás Czémán
2025-12-31 16:30 ` [PATCH v3 1/9] remoteproc: qcom_q6v5_mss: Introduce need_pas_mem_setup Barnabás Czémán
2026-01-01 13:17 ` Bryan O'Donoghue
2025-12-31 16:30 ` [PATCH v3 2/9] dt-bindings: remoteproc: qcom,msm8916-mss-pil: Add MDM9607 Barnabás Czémán
2026-01-02 10:58 ` Krzysztof Kozlowski
2025-12-31 16:30 ` [PATCH v3 3/9] remoteproc: qcom_q6v5_mss: " Barnabás Czémán
2026-01-01 13:13 ` Bryan O'Donoghue
2026-01-01 13:19 ` Bryan O'Donoghue
2026-01-01 13:23 ` Bryan O'Donoghue
2026-01-01 13:50 ` barnabas.czeman
2026-01-01 20:58 ` Bryan O'Donoghue
2026-01-01 21:57 ` barnabas.czeman
2026-01-02 9:55 ` Bryan O'Donoghue
2026-01-02 12:50 ` barnabas.czeman
2026-01-02 12:00 ` Konrad Dybcio
2026-01-02 12:59 ` Bryan O'Donoghue
2026-01-02 14:02 ` Konrad Dybcio [this message]
2026-01-02 13:00 ` Bryan O'Donoghue
2026-01-02 14:03 ` Konrad Dybcio
2026-01-03 7:41 ` barnabas.czeman
2025-12-31 16:30 ` [PATCH v3 4/9] dt-bindings: remoteproc: qcom,msm8916-mss-pil: Add MSM8917 Barnabás Czémán
2026-01-02 10:59 ` Krzysztof Kozlowski
2025-12-31 16:30 ` [PATCH v3 5/9] remoteproc: qcom_q6v5_mss: " Barnabás Czémán
2025-12-31 16:30 ` [PATCH v3 6/9] dt-bindings: remoteproc: qcom,msm8916-mss-pil: Add MSM8937 Barnabás Czémán
2026-01-02 11:00 ` Krzysztof Kozlowski
2025-12-31 16:30 ` [PATCH v3 7/9] remoteproc: qcom_q6v5_mss: " Barnabás Czémán
2025-12-31 16:30 ` [PATCH v3 8/9] dt-bindings: remoteproc: qcom,msm8916-mss-pil: Add MSM8940 Barnabás Czémán
2026-01-02 11:00 ` Krzysztof Kozlowski
2025-12-31 16:30 ` [PATCH v3 9/9] remoteproc: qcom_q6v5_mss: " Barnabás Czémán
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