AMD Pstate driver patches for OpenAnolis 6.6 kernel - phase1 · Pull Request !5956 · anolis/cloud-kernel

bugzilla: https://bugzilla.openanolis.cn/show_bug.cgi?id=26498

**AMD pstate driver update patches for OpenAnolis 23.1 (6.6 kernel) - Phase1**

cpufreq: amd-pstate: Fix the inconsistency in max frequency units
cpufreq: amd-pstate: initialize core precision boost state
cpufreq: amd-pstate: Cap the CPPC.max_perf to nominal_perf if CPB is off
cpufreq/amd-pstate-ut: Convert nominal_freq to khz during comparisons
cpufreq: pcc: Remove empty exit() callback
cpufreq: Make cpufreq_driver->exit() return void
cpufreq: amd-pstate: Fix uninitialized variable in amd_pstate_cpu_boost_update()
cpufreq/amd-pstate: Use topology_logical_package_id() instead of logical_die_id()
cpufreq/amd-pstate-ut: Don't check for highest perf matching on prefcore
cpufreq/amd-pstate: Remove warning for X86_FEATURE_CPPC on certain Zen models
cpufreq/amd-pstate: Add the missing cpufreq_cpu_put()
cpufreq/amd-pstate: Catch failures for amd_pstate_epp_update_limit()
x86/CPU/AMD: Always inline amd_clear_divider()
x86/amd: Move amd_get_highest_perf() from amd.c to cppc.c
ACPI: CPPC: Adjust return code for inline functions in !CONFIG_ACPI_CPPC_LIB
x86/amd: Rename amd_get_highest_perf() to amd_get_boost_ratio_numerator()
x86/amd: Move amd_get_highest_perf() out of amd-pstate
x86/amd: Detect preferred cores in amd_get_boost_ratio_numerator()
cpufreq: amd-pstate: Merge amd_pstate_highest_perf_set() into amd_get_boost_ratio_numerator()
cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value
cpufreq: amd-pstate: Optimize amd_pstate_update_limits()
cpufreq/amd-pstate: Export symbols for changing modes
cpufreq/amd-pstate-ut: Add test case for mode switches
cpufreq/amd-pstate-ut: Fix an "Uninitialized variables" issue
cpufreq/amd-pstate: Use nominal perf for limits when boost is disabled

**Unit test**
##########
```javascript 
$ cat /boot/config-6.6.102-pstate | grep PSTATE
CONFIG_X86_INTEL_PSTATE=y
CONFIG_X86_AMD_PSTATE=y
CONFIG_X86_AMD_PSTATE_DEFAULT_MODE=3
CONFIG_X86_AMD_PSTATE_UT=m

$ sudo cat /proc/cmdline
amd_pstate=passive
 
$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate
 
$ cpupower frequency-info
	analyzing CPU 408:
	driver: amd-pstate
	CPUs which run at the same hardware frequency: 408
	CPUs which need to have their frequency coordinated by software: 408
	maximum transition latency: 20.0 us
	hardware limits: 1.20 GHz - 4.12 GHz
	available cpufreq governors: conservative ondemand userspace powersave rmance schedutil
	current policy: frequency should be within 2.10 GHz and 4.12 GHz.
					The governor "conservative" may decide which speed to use
					within this range.
	current CPU frequency: Unable to call hardware
	current CPU frequency: 2.19 GHz (asserted by call to kernel)
	boost state support:
		Supported: yes
		Active: yes
		AMD PSTATE Highest Performance: 255. Maximum Frequency: 4.12 GHz.
		AMD PSTATE Nominal Performance: 167. Nominal Frequency: 2.70 GHz.
		AMD PSTATE Lowest Non-linear Performance: 130. Lowest Non-linear uency: 2.10 GHz.
		AMD PSTATE Lowest Performance: 75. Lowest Frequency: 1.20 GHz.
 
 
* Load amd_pstate_ut module
	$ sudo modprobe amd_pstate_ut
	$ sudo lsmod | grep amd_pstate_ut
	amd_pstate_ut 16384 0
 
* make selftest:
	$ cd linux
	$ make -C tools/testing/selftests
 
* make perf
	$ cd tools/perf/
	$ make
 
* Installation & Steps
	$ cd linux
	$ make -C tools/testing/selftests install INSTALL_PATH=~/kselftest
	$ sudo cp tools/perf/perf /usr/bin/perf
	$ sudo ~/kselftest/run_kselftest.sh -c amd-pstate
 
* Verify Results:
	$ sudo dmesg | grep pstate
	[ 335.630200] kselftest: Running tests in amd-pstate
	[ 335.718885] amd_pstate_ut: 1 amd_pstate_ut_acpi_cpc_valid success!
	[ 335.718893] amd_pstate_ut: 2 amd_pstate_ut_check_enabled success!
	[ 335.727374] amd_pstate_ut: 3 amd_pstate_ut_check_perf success!
	[ 335.727421] amd_pstate_ut: 4 amd_pstate_ut_check_freq success!
	[ 340.437365] amd_pstate_ut: 5 amd_pstate_ut_check_driver success!
	[ 692.825338] audit: type=1123 audit(1760887904.875:343): pid=32166 uid=1000 =1000 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 ='cwd="/home/amd/kselftest/amd-pstate" cmd=2E2F72756E2E7368202D74206261736963 "/usr/bin/sudo" terminal=pts/0 res=success'
 
* Specified test case:
	$ cd ~/kselftest/amd-pstate
 
	1. $ sudo ./run.sh -t basic
		Result:
			$ sudo dmesg | grep "amd_pstate_ut" | tee log.txt
			$ cat log.txt
			[ 335.718885] amd_pstate_ut: 1 amd_pstate_ut_acpi_cpc_valid success!
			[ 335.718893] amd_pstate_ut: 2 amd_pstate_ut_check_enabled success!
			[ 335.727374] amd_pstate_ut: 3 amd_pstate_ut_check_perf success!
			[ 335.727421] amd_pstate_ut: 4 amd_pstate_ut_check_freq success!
			[ 340.437365] amd_pstate_ut: 5 amd_pstate_ut_check_driver success!
			[ 692.890559] amd_pstate_ut: 1 amd_pstate_ut_acpi_cpc_valid success!
			[ 692.890567] amd_pstate_ut: 2 amd_pstate_ut_check_enabled success!
			[ 692.896181] amd_pstate_ut: 3 amd_pstate_ut_check_perf success!
			[ 692.896229] amd_pstate_ut: 4 amd_pstate_ut_check_freq success!
			[ 697.455447] amd_pstate_ut: 5 amd_pstate_ut_check_driver success!
 
	2. $ sudo ./run.sh -t tbench
		Result:
			$ cat selftest.tbench.csv
			Governor, Round, Des-perf, Freq, Load, Performance, Energy, Performance Watt
			Unit, , , GHz, , MB/s, J, MB/J
			amd-pstate-ondemand, 1, 0, 0.29, 0.0000, , ,
			amd-pstate-ondemand, 2, 0, 0.27, 0.0000, , ,
			amd-pstate-ondemand, 3, 0, 0.26, 0.0000, , ,
			amd-pstate-ondemand, Average, 0, 0, 0, 0, 0.273333, 0.0000
			amd-pstate-schedutil, 1, 0, 0.4, 0.0000, , ,
			amd-pstate-schedutil, 2, 0, 0.26, 0.0000, , ,
			amd-pstate-schedutil, 3, 0, 0.27, 0.0000, , ,
			amd-pstate-schedutil, Average, 0, 0, 0, 0, 0.31, 0.0000
			amd-pstate-ondemand VS amd-pstate-schedutil, Comprison(%), , , , , 147,
 
	3. $ sudo ./run.sh -t gitsource
		Result:
			$ cat selftest.gitsource.csv
			Governor, Round, Des-perf, Freq, Load, Time, Energy, Performance Per Watt
			Unit, , , GHz, , s, J, 1/J
			amd-pstate-ondemand, 1, 0.09, 28.27, 0.035373187, , ,
			amd-pstate-ondemand, 2, 0.09, 27.68, 0.036127167, , ,
			amd-pstate-ondemand, 3, 0.09, 28.52, 0.035063113, , ,
			amd-pstate-ondemand, Average, 0, 0, 0, 0.09, 28.1567, 0.035515525
			amd-pstate-schedutil, 1, 0.11, 30.7, 0.032573289, , ,
			amd-pstate-schedutil, 2, 0.11, 29.17, 0.034281796, , ,
			amd-pstate-schedutil, 3, 0.11, 29.01, 0.034470872, , ,
			amd-pstate-schedutil, Average, 0, 0, 0, 0.11, 29.6267, 0.033753337
			amd-pstate-ondemand VS amd-pstate-schedutil, Comprison(%), , , , 22.2222, 07, -4.9617
 ```
 
 **Note: Backporting P-state driver patches to the Anolis 6.6 kernel involves 150+ patches. The unit test cases will only work after all backported patches are merged into the kernel.** 
 > The quote

类型	指派人员	状态
审查	xunlei 半叶枫尘 Artie Ding winterddd xueshuai 冯光辉 Guixin Liu kun-llfl Xuchun Shang	已完成 (0/0人)
测试	小龙已测试通过	已完成 (1/1人)

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