linux-kernel - Re: [PATCH 06/10] arm64: dts: qcom: sc8280xp: enable GICv3 ITS for PCIe

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Date: Thu, 15 Feb 2024 21:50:36 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Johan Hovold <johan+linaro@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kw@...ux.com>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
 linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/10] arm64: dts: qcom: sc8280xp: enable GICv3 ITS for
 PCIe

On 12.02.2024 17:50, 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.
> 
> Note that using the GIC ITS on SC8280XP will cause Advanced Error
> Reporting (AER) interrupts to be received on errors unlike when using
> the internal MSI controller. This will specifically lead to
> notifications about Correctable Errors being logged for the Wi-Fi
> controller the Lenovo ThinkPad X13s when the AER driver is enabled.
> 
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---

The numbers match

Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad