linux-kernel - Re: [PATCH] arm64: dts: qcom: x1e80100: enable GICv3 ITS for PCIe

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Message-ID: <f7e74a6f-0548-4caa-a8fc-8180c619c9aa@linaro.org>
Date: Thu, 11 Jul 2024 11:54:15 +0200
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Johan Hovold <johan+linaro@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Abel Vesa <abel.vesa@...aro.org>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: x1e80100: enable GICv3 ITS for PCIe

On 11.07.2024 11:02 AM, Johan Hovold wrote:
> The DWC PCIe controller can be used with its internal MSI controller or
> with an external one such as the GICv3 Interrupt Translation Service
> (ITS).
> 
> Add the msi-map properties needed to use the GIC ITS. This will also
> make Linux switch to the ITS implementation, which allows for assigning
> affinity to individual MSIs.
> 
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---

X1E CRD throws tons of correctable errors with this on PCIe6a:

[    9.358915] pcieport 0007:00:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (Receiver ID)
[    9.358916] pcieport 0007:00:00.0:   device [17cb:0111] error status/mask=00000001/0000e000
[    9.358917] pcieport 0007:00:00.0:    [ 0] RxErr                 
[    9.358921] pcieport 0007:00:00.0: AER: Multiple Correctable error message received from 0007:00:00.0
[    9.358952] pcieport 0007:00:00.0: AER: found no error details for 0007:00:00.0
[    9.358953] pcieport 0007:00:00.0: AER: Multiple Correctable error message received from 0007:00:00.0
[    9.359003] pcieport 0007:00:00.0: AER: found no error details for 0007:00:00.0
[    9.359004] pcieport 0007:00:00.0: AER: Multiple Correctable error message received from 0007:01:00.0
[    9.359008] pcieport 0007:00:00.0: PCIe Bus Error: severity=Correctable, type=Physical Layer, (Transmitter ID)
[    9.359009] pcieport 0007:00:00.0:   device [17cb:0111] error status/mask=00001001/0000e000
[    9.359010] pcieport 0007:00:00.0:    [ 0] RxErr                 
[    9.359011] pcieport 0007:00:00.0:    [12] Timeout  

Konrad