linux-kernel - [PATCH 5/5] arm64: dts: mt6795: Add complete CPU caches information

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Date:   Tue,  6 Dec 2022 12:23:30 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        nfraprado@...labora.com, kernel@...labora.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH 5/5] arm64: dts: mt6795: Add complete CPU caches information

This SoC's AP subsystem has 8x Cortex-A53 CPUs, specifically,
four CPUs per cluster, with two CPU clusters.

Each CPU has:
 - A 32KB I-cache, 2-way set associative;
 - A 32KB D-cache, 4-way set associative.

Each cluster has a unified 1MB L2 cache, 16-way set associative.

With that in mind, add the appropriate properties needed to specify the
caches information for this SoC, which will now be correctly exported
to sysfs.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 arch/arm64/boot/dts/mediatek/mt6795.dtsi | 50 ++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt6795.dtsi b/arch/arm64/boot/dts/mediatek/mt6795.dtsi
index bb575837e4ce..b3fc76d837a9 100644
--- a/arch/arm64/boot/dts/mediatek/mt6795.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt6795.dtsi
@@ -40,6 +40,12 @@ cpu1: cpu@1 {
 			enable-method = "psci";
 			reg = <0x001>;
 			cci-control-port = <&cci_control2>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 		};
 
@@ -49,6 +55,12 @@ cpu2: cpu@2 {
 			enable-method = "psci";
 			reg = <0x002>;
 			cci-control-port = <&cci_control2>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 		};
 
@@ -58,6 +70,12 @@ cpu3: cpu@3 {
 			enable-method = "psci";
 			reg = <0x003>;
 			cci-control-port = <&cci_control2>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_0>;
 		};
 
@@ -67,6 +85,12 @@ cpu4: cpu@100 {
 			enable-method = "psci";
 			reg = <0x100>;
 			cci-control-port = <&cci_control1>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_1>;
 		};
 
@@ -76,6 +100,12 @@ cpu5: cpu@101 {
 			enable-method = "psci";
 			reg = <0x101>;
 			cci-control-port = <&cci_control1>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_1>;
 		};
 
@@ -85,6 +115,12 @@ cpu6: cpu@102 {
 			enable-method = "psci";
 			reg = <0x102>;
 			cci-control-port = <&cci_control1>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_1>;
 		};
 
@@ -94,6 +130,12 @@ cpu7: cpu@103 {
 			enable-method = "psci";
 			reg = <0x103>;
 			cci-control-port = <&cci_control1>;
+			i-cache-size = <32768>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <32768>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <128>;
 			next-level-cache = <&l2_1>;
 		};
 
@@ -138,11 +180,19 @@ core3 {
 		l2_0: l2-cache0 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-size = <1048576>;
+			cache-line-size = <64>;
+			cache-sets = <1024>;
+			cache-unified;
 		};
 
 		l2_1: l2-cache1 {
 			compatible = "cache";
 			cache-level = <2>;
+			cache-size = <1048576>;
+			cache-line-size = <64>;
+			cache-sets = <1024>;
+			cache-unified;
 		};
 	};
 
-- 
2.38.1