From 058387d9c6b70e225da82492e1e193635c3fac3f Mon Sep 17 00:00:00 2001 From: Willow Cunningham Date: Mon, 7 Oct 2024 17:29:54 -0400 Subject: [PATCH] arm64: dts: broadcom: Fix L2 linesize for Raspberry Pi 5 Set the cache-line-size parameter of the L2 cache for each core to the correct value of 64 bytes. Previously, the L2 cache line size was incorrectly set to 128 bytes for the Broadcom BCM2712. This causes validation tests for the Performance Application Programming Interface (PAPI) tool to fail as they depend on sysfs accurately reporting cache line sizes. The correct value of 64 bytes is stated in the official documentation of the ARM Cortex A-72, which is linked in the comments of arm64/boot/dts/broadcom/bcm2712.dtsi as the source for cache-line-size. Fixes: faa3381267d0 ("arm64: dts: broadcom: Add minimal support for Raspberry Pi 5") Signed-off-by: Willow Cunningham Link: https://lore.kernel.org/r/20241007212954.214724-1-willow.e.cunningham@maine.edu Signed-off-by: Florian Fainelli --- arch/arm64/boot/dts/broadcom/bcm2712.dtsi | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi index 6e5a984c1d4e..26a29e5e5078 100644 --- a/arch/arm64/boot/dts/broadcom/bcm2712.dtsi +++ b/arch/arm64/boot/dts/broadcom/bcm2712.dtsi @@ -67,7 +67,7 @@ cpu0: cpu@0 { l2_cache_l0: l2-cache-l0 { compatible = "cache"; cache-size = <0x80000>; - cache-line-size = <128>; + cache-line-size = <64>; cache-sets = <1024>; //512KiB(size)/64(line-size)=8192ways/8-way set cache-level = <2>; cache-unified; @@ -91,7 +91,7 @@ cpu1: cpu@1 { l2_cache_l1: l2-cache-l1 { compatible = "cache"; cache-size = <0x80000>; - cache-line-size = <128>; + cache-line-size = <64>; cache-sets = <1024>; //512KiB(size)/64(line-size)=8192ways/8-way set cache-level = <2>; cache-unified; @@ -115,7 +115,7 @@ cpu2: cpu@2 { l2_cache_l2: l2-cache-l2 { compatible = "cache"; cache-size = <0x80000>; - cache-line-size = <128>; + cache-line-size = <64>; cache-sets = <1024>; //512KiB(size)/64(line-size)=8192ways/8-way set cache-level = <2>; cache-unified; @@ -139,7 +139,7 @@ cpu3: cpu@3 { l2_cache_l3: l2-cache-l3 { compatible = "cache"; cache-size = <0x80000>; - cache-line-size = <128>; + cache-line-size = <64>; cache-sets = <1024>; //512KiB(size)/64(line-size)=8192ways/8-way set cache-level = <2>; cache-unified;