Am 21.12.21 um 23:48 schrieb Richard Schleich:

This patch fixes the kernel warning
"cacheinfo: Unable to detect cache hierarchy for CPU 0"
for the bcm2711 on newer kernel versions.

Signed-off-by: Richard Schleich <redacted>

Tested-by: Stefan Wahren <redacted>

I tested the patch with a Raspberry Pi 4 (arm64/defconfig) and here are
some outputs:

/sys/devices/system/cpu/cpu0/cache

./index2/number_of_sets:1024
./index2/ways_of_associativity:16
./index2/shared_cpu_list:0-3
./index2/type:Unified
./index2/size:1024K
./index2/level:2
./index2/coherency_line_size:64
./index2/shared_cpu_map:f
./index0/number_of_sets:256
./index0/ways_of_associativity:2
./index0/shared_cpu_list:0
./index0/type:Data
./index0/size:32K
./index0/level:1
./index0/coherency_line_size:64
./index0/shared_cpu_map:1
./index1/number_of_sets:256
./index1/ways_of_associativity:3
./index1/shared_cpu_list:0
./index1/type:Instruction
./index1/size:48K
./index1/level:1
./index1/coherency_line_size:64
./index1/shared_cpu_map:1

lscpu

Architecture:        aarch64
Byte Order:          Little Endian
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  1
Core(s) per socket:  4
Socket(s):           1
NUMA node(s):        1
Vendor ID:           ARM
Model:               3
Model name:          Cortex-A72
Stepping:            r0p3
CPU max MHz:         1500,0000
CPU min MHz:         600,0000
BogoMIPS:            108.00
L1d cache:           32K
L1i cache:           48K
L2 cache:            1024K
NUMA node0 CPU(s):   0-3
Flags:               fp asimd evtstrm crc32 cpuid