From a8d4b6700069f6717c65ee8ced63e525836ba855 Mon Sep 17 00:00:00 2001
From: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Date: Mon, 10 Jul 2023 14:37:37 +0200
Subject: [PATCH] arm64: zynqmp: Add L2 cache nodes
Linux kernel throws "cacheinfo: Unable to detect cache hierarchy for
CPU 0" warning when booting on zu+ Soc. To fix it add the L2 cache
node and let each CPU point to it.
Reported-by: John Toomey <john.toomey@amd.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/c8dfabab12c97922aaad7fa91be0cbc7e4021528.1688992653.git.michal.simek@amd.com
---
arch/arm/dts/zynqmp.dtsi | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/dts/zynqmp.dtsi b/arch/arm/dts/zynqmp.dtsi
index 38114d5538..59b52919f1 100644
--- a/arch/arm/dts/zynqmp.dtsi
+++ b/arch/arm/dts/zynqmp.dtsi
@@ -33,6 +33,7 @@
operating-points-v2 = <&cpu_opp_table>;
reg = <0x0>;
cpu-idle-states = <&CPU_SLEEP_0>;
+ next-level-cache = <&L2>;
};
cpu1: cpu@1 {
@@ -42,6 +43,7 @@
reg = <0x1>;
operating-points-v2 = <&cpu_opp_table>;
cpu-idle-states = <&CPU_SLEEP_0>;
+ next-level-cache = <&L2>;
};
cpu2: cpu@2 {
@@ -51,6 +53,7 @@
reg = <0x2>;
operating-points-v2 = <&cpu_opp_table>;
cpu-idle-states = <&CPU_SLEEP_0>;
+ next-level-cache = <&L2>;
};
cpu3: cpu@3 {
@@ -60,6 +63,13 @@
reg = <0x3>;
operating-points-v2 = <&cpu_opp_table>;
cpu-idle-states = <&CPU_SLEEP_0>;
+ next-level-cache = <&L2>;
+ };
+
+ L2: l2-cache {
+ compatible = "cache";
+ cache-level = <2>;
+ cache-unified;
};
idle-states {
--
2.39.5