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authorWillow Cunningham <willow.e.cunningham@gmail.com>2024-10-07 17:29:54 -0400
committerFlorian Fainelli <florian.fainelli@broadcom.com>2024-12-17 11:03:22 -0800
commit058387d9c6b70e225da82492e1e193635c3fac3f (patch)
treef344ddafe3092c455041eae87f4cfd8593a90ada
parent40384c840ea1944d7c5a392e8975ed088ecf0b37 (diff)
downloadlwn-058387d9c6b70e225da82492e1e193635c3fac3f.tar.gz
lwn-058387d9c6b70e225da82492e1e193635c3fac3f.zip
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 <willow.e.cunningham@maine.edu> Link: https://lore.kernel.org/r/20241007212954.214724-1-willow.e.cunningham@maine.edu Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
-rw-r--r--arch/arm64/boot/dts/broadcom/bcm2712.dtsi8
1 files 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 @@
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 @@
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 @@
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 @@
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;