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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Chen , kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The imx6 SMP system has the same DMA memory coherency issue [1] with pl310 L2 controller. With this shared override bit set, the customer reports the DMA coherency issue is gone. Besides, I have tested the performance using USB ethernet with/without this bit, it shows no difference. [1] http://patchwork.ozlabs.org/patch/469362/ Signed-off-by: Peter Chen --- arch/arm/boot/dts/imx6qdl.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi index ed613eb..30e21ee 100644 --- a/arch/arm/boot/dts/imx6qdl.dtsi +++ b/arch/arm/boot/dts/imx6qdl.dtsi @@ -185,6 +185,7 @@ cache-level = <2>; arm,tag-latency = <4 2 3>; arm,data-latency = <4 2 3>; + arm,shared-override; }; pcie: pcie@0x01000000 {