No regression were found booting the Bionic kernel with the patches applied.
== Enable CPPC control in firmware == CAVM_CN99xx# env set cppccontrol 1 == With stock bionic == ubuntu@starbuck:~$ uname -a Linux starbuck 4.15.0-36-generic #39-Ubuntu SMP Wed Sep 26 06:05:44 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux ubuntu@starbuck:~$ ls -lR /sys/devices/system/cpu/cpu1/acpi_cppc/ /sys/devices/system/cpu/cpu1/acpi_cppc/: total 0 -r--r--r-- 1 root root 4096 Oct 10 20:02 feedback_ctrs -r--r--r-- 1 root root 4096 Oct 10 20:02 highest_perf -r--r--r-- 1 root root 4096 Oct 10 20:02 lowest_nonlinear_perf -r--r--r-- 1 root root 4096 Oct 10 20:02 lowest_perf -r--r--r-- 1 root root 4096 Oct 10 20:02 nominal_perf -r--r--r-- 1 root root 4096 Oct 10 20:02 reference_perf -r--r--r-- 1 root root 4096 Oct 10 20:02 wraparound_time ubuntu@starbuck:~$ == Bionic kernel with patches. == ubuntu@starbuck:~$ uname -a Linux starbuck 4.15.0-37-generic #40~lp1796918+build.1 SMP Tue Oct 9 15:52:06 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux ubuntu@starbuck:~$ ubuntu@starbuck:~$ ls -lR /sys/devices/system/cpu/cpu1/acpi_cppc/ /sys/devices/system/cpu/cpu1/acpi_cppc/: total 0 -r--r--r-- 1 root root 4096 Oct 10 20:14 feedback_ctrs -r--r--r-- 1 root root 4096 Oct 10 20:14 highest_perf -r--r--r-- 1 root root 4096 Oct 10 20:14 lowest_freq -r--r--r-- 1 root root 4096 Oct 10 20:14 lowest_nonlinear_perf -r--r--r-- 1 root root 4096 Oct 10 20:14 lowest_perf -r--r--r-- 1 root root 4096 Oct 10 20:14 nominal_freq -r--r--r-- 1 root root 4096 Oct 10 20:14 nominal_perf -r--r--r-- 1 root root 4096 Oct 10 20:14 reference_perf -r--r--r-- 1 root root 4096 Oct 10 20:14 wraparound_time ubuntu@starbuck:~$ ubuntu@starbuck:~$ cat /sys/devices/system/cpu/cpu1/acpi_cppc/highest_perf 2500000 ubuntu@starbuck:~$ ubuntu@starbuck:~$ cat /sys/devices/system/cpu/cpu1/acpi_cppc/lowest_perf 1000000 ubuntu@starbuck:~$ ubuntu@starbuck:~$ cat /sys/devices/system/cpu/cpu1/acpi_cppc/feedback_ctrs ref:1306246528 del:4074430338 ubuntu@starbuck:~$ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1796918 Title: [Bionic] additional support for CPPC (V3) and documentation. Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Bug description: [IMPACT] Add support for CPPC V3 [FIX] 33477d84c26b cpufreq / CPPC: Add cpuinfo_cur_freq support for CPPC b382bf885269 ACPI / CPPC: Document CPPC sysfs interface 256f19d212f2 cpufreq / CPPC: Support for CPPC v3 4773e77cdc9b ACPI / CPPC: Add support for CPPC v3 [Test] [Regression Potential] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1796918/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
