linux-kernel - Re: [PATCH] arm64: dts: sm8650: Add msi-map-mask for PCIe nodes

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Message-ID: <ZdRYbyKxtkIqkpRd@hovoldconsulting.com>
Date: Tue, 20 Feb 2024 08:44:47 +0100
From: Johan Hovold <johan@...nel.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: sm8650: Add msi-map-mask for PCIe nodes

On Fri, Feb 16, 2024 at 10:35:21PM +0530, Manivannan Sadhasivam wrote:
> "msi-map-mask" is a required property for all Qcom PCIe controllers as it
> would allow all PCIe devices under a bus to share the same MSI identifier.
> 
> Without this property, each device has to use a separate MSI identifier
> which is not possible due to platform limitations.
> 
> Currently, this is not an issue since only one device is connected to the
> bus on boards making use of this SoC.
> 
> Fixes: a33a532b3b1e ("arm64: dts: qcom: sm8650: Use GIC-ITS for PCIe0 and PCIe1")
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Reported-by: Johan Hovold <johan+linaro@...nel.org>
Reviewed-by: Johan Hovold <johan+linaro@...nel.org>

Johan