cppc_cpufreq.ko doesn't load on Cavium ThunderX2 system w/Ubuntu 22.04.3 LTS

[torel]

[Bug Description]

cpufreq governor fails to start after installing Ubuntu 22.04.3LTS w/ latest kernel

[Steps to Reproduce]
1) Booted Ubuntu 22.04.3 LTS w/ 5.15.0-94-generic
2) dmesg | grep cppc shows no driver
3) lsmod | grep cppc shows that cppc-cpufreq is not loaded
4) lsmod | grep thunderx2 is loaded and perf works
root@n008:~# lsmod |grep thunder
thunderx2_pmu 24576 0

[Actual Results]

root@n008:~# modprobe cppc-cpufreq
modprobe: ERROR: could not insert 'cppc_cpufreq': No such device

root@n008:~# cpupower frequency-info
analyzing CPU 0:
  no or unknown cpufreq driver is active on this CPU
  CPUs which run at the same hardware frequency: Not Available
  CPUs which need to have their frequency coordinated by software: Not Available
  maximum transition latency: Cannot determine or is not supported.
Not Available
  available cpufreq governors: Not Available
  Unable to determine current policy
  current CPU frequency: Unable to call hardware
  current CPU frequency: Unable to call to kernel
root@n005:~#

[Expected Results]
Can set frequency governor on Ubuntu 22.04.3LT w/ 5.15.0-94-generic or linux-hwe kernels
Used to work Ubuntu 18.04.6LTS w/ 5.4.0-150-generic

[Reproducibility]
100%

[Additional information]
root@n008:/etc/default# inxi -b
System:
  Host: n008 Kernel: 5.15.0-94-generic aarch64 bits: 64 Console: pty pts/0
    Distro: Ubuntu 22.04.3 LTS (Jammy Jellyfish)
Machine:
  Type: Server System: GIGABYTE product: R281-T94-00 v: 0100 serial: XXXXXXXXX
  Mobo: GIGABYTE model: MT91-FS4-00 v: 00030101 serial: XXXXXXXUEFI: GIGABYTE v: F34
    date: 08/13/2020
CPU:
  Info: 2x 32-core Model N/A [MT MCP SMP] speed: 0
Graphics:
  Device-1: ASPEED Graphics Family driver: ast v: kernel
  Display: server: N/A driver: X: loaded: modesetting gpu: ast tty: 118x27
  Message: GL data unavailable in console for root.
Network:
  Device-1: Mellanox MT28908 Family [ConnectX-6] driver: mlx5_core
  Device-2: Mellanox MT28908 Family [ConnectX-6] driver: mlx5_core
  Device-3: QLogic FastLinQ QL41000 Series 10/25/40/50GbE driver: qede
  Device-4: QLogic FastLinQ QL41000 Series 10/25/40/50GbE driver: qede
  Device-5: Mellanox MT28908 Family [ConnectX-6] driver: mlx5_core
  Device-6: Mellanox MT28908 Family [ConnectX-6] driver: mlx5_core
  Device-7: Mellanox MT27710 Family [ConnectX-4 Lx] driver: mlx5_core
Drives:
  Local Storage: total: raw: 7.2 TiB usable: 5.46 TiB used: 1.74 TiB (31.9%)
Info:
  Processes: 2282 Uptime: 1h 3m Memory: 1001.64 GiB used: 8.65 GiB (0.9%) Init: systemd
  runlevel: 5 Shell: Bash inxi: 3.3.13

[Resolution]
Related to bug # 1745007

[torel (torehl)]

https://access.redhat.com/articles/7011459

[torel (torehl)]

Still not working on $ uname -ar
Linux n009 5.15.0-100-generic #110-Ubuntu SMP Wed Feb 7 13:28:04 UTC 2024 aarch64 aarch64 aarch64 GNU/Linu

[torel (torehl)]

Same on 5.15.0-102-generic. Is there some kernel parameter that needs to be set? Something changed from 5.4.0-150-generic Ubuntu 18.04.6LTS, where module worked fine.

root@n005:~# modprobe -D cppc_cpufreq
insmod /lib/modules/5.15.0-102-generic/kernel/drivers/cpufreq/cppc_cpufreq.ko

root@n005:~# ll /lib/modules/5.15.0-102-generic/kernel/drivers/cpufreq/cppc_cpufreq.ko
-rw-r--r-- 1 root root 26977 Mar 5 16:22 /lib/modules/5.15.0-102-generic/kernel/drivers/cpufreq/cppc_cpufreq.ko

root@n005:~# modprobe -vvv cppc_cpufreq
modprobe: INFO: ../libkmod/libkmod.c:367 kmod_set_log_fn() custom logging function 0xaaaaaaaa5970 registered
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-102-generic/modules.dep.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-102-generic/modules.alias.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-102-generic/modules.symbols.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-102-generic/modules.builtin.alias.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-102-generic/modules.builtin.bin
modprobe: DEBUG: ../libkmod/libkmod-module.c:556 kmod_module_new_from_lookup() input alias=cppc_cpufreq, normalized=cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod-module.c:562 kmod_module_new_from_lookup() lookup modules.dep cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod.c:597 kmod_search_moddep() use mmaped index 'modules.dep' modname=cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod.c:405 kmod_pool_get_module() get module name='cppc_cpufreq' found=(nil)
modprobe: DEBUG: ../libkmod/libkmod.c:413 kmod_pool_add_module() add 0xaaaaaaad8490 key='cppc_cpufreq'
modprobe: DEBUG: ../libkmod/libkmod-module.c:202 kmod_module_parse_depline() 0 dependencies for cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod-module.c:589 kmod_module_new_from_lookup() lookup cppc_cpufreq=0, list=0xaaaaaaad7f20
modprobe: DEBUG: ../libkmod/libkmod.c:502 lookup_builtin_file() use mmaped index 'modules.builtin' modname=cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod-module.c:1760 kmod_module_get_initstate() could not open '/sys/module/cppc_cpufreq/initstate': No such file or directory
modprobe: DEBUG: ../libkmod/libkmod-module.c:1770 kmod_module_get_initstate() could not open '/sys/module/cppc_cpufreq': No such file or directory
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_pcsp mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_usb_audio mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=cx88_alsa mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_atiixp_modem mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_intel8x0m mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module....

[torel (torehl)]

Tested the latest kernel. cppc_cpufreq still does not load.

root@n005:~# uname -ar
Linux n005 5.15.0-112-generic #122-Ubuntu SMP Thu May 23 07:51:32 UTC 2024 aarch64 aarch64 aarch64 GNU/Linux
root@n005:~# modprobe -vvv cppc_cpufreq
modprobe: INFO: ../libkmod/libkmod.c:367 kmod_set_log_fn() custom logging function 0xaaaaaaaa5970 registered
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-112-generic/modules.dep.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-112-generic/modules.alias.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-112-generic/modules.symbols.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-112-generic/modules.builtin.alias.bin
modprobe: DEBUG: ../libkmod/libkmod-index.c:757 index_mm_open() file=/lib/modules/5.15.0-112-generic/modules.builtin.bin
modprobe: DEBUG: ../libkmod/libkmod-module.c:556 kmod_module_new_from_lookup() input alias=cppc_cpufreq, normalized=cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod-module.c:562 kmod_module_new_from_lookup() lookup modules.dep cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod.c:597 kmod_search_moddep() use mmaped index 'modules.dep' modname=cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod.c:405 kmod_pool_get_module() get module name='cppc_cpufreq' found=(nil)
modprobe: DEBUG: ../libkmod/libkmod.c:413 kmod_pool_add_module() add 0xaaaaaaad84a0 key='cppc_cpufreq'
modprobe: DEBUG: ../libkmod/libkmod-module.c:202 kmod_module_parse_depline() 0 dependencies for cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod-module.c:589 kmod_module_new_from_lookup() lookup cppc_cpufreq=0, list=0xaaaaaaad7f30
modprobe: DEBUG: ../libkmod/libkmod.c:502 lookup_builtin_file() use mmaped index 'modules.builtin' modname=cppc_cpufreq
modprobe: DEBUG: ../libkmod/libkmod-module.c:1760 kmod_module_get_initstate() could not open '/sys/module/cppc_cpufreq/initstate': No such file or directory
modprobe: DEBUG: ../libkmod/libkmod-module.c:1770 kmod_module_get_initstate() could not open '/sys/module/cppc_cpufreq': No such file or directory
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_pcsp mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_usb_audio mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=cx88_alsa mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_atiixp_modem mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_intel8x0m mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=snd_via82xx_modem mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get_options() modname=ib_ipoib mod->name=cppc_cpufreq mod->alias=(null)
modprobe: DEBUG: ../libkmod/libkmod-module.c:1404 kmod_module_get...

[torel (torehl)]

Still does not work 5.15.0-112-generic.