为什么在内核中启用并编译了amd p-状态之后就不可用了？

Question

我试图测试amd p-state最近的已发布，但是在编译了整个内核之后，或者应用了相应的修补程序，amd对于系统来说是不可用的。

在资料来源方面：

ls  ~/linux-amd-pstate-dev-v5/drivers/cpufreq/amd*

amd-pstate-trace.c           
amd-pstate-trace.h           
amd-pstate.c  

在启动配置文件中的相关部分之后

Processor type and features  --->
  [*] Symmetric multi-processing support
  [*] Support x2apic
  [*] AMD ACPI2Platform devices support
  Processor family (Opteron/Athlon64/Hammer/K8)  --->
    (X) Opteron/Athlon64/Hammer/K8
  [*] Supported processor vendors  --->
    [*]   Support AMD processors (NEW)
  [*] SMT (Hyperthreading) scheduler support
  [*] Multi-core scheduler support
  [*] Machine Check / overheating reporting
  [*]   AMD MCE features
  Performance monitoring  --->
    <*> AMD Processor Power Reporting Mechanism
  [*]   AMD microcode loading support
Power management and ACPI options  --->
  CPU Frequency scaling  --->
      Default CPUFreq governor (ondemand)  --->
      CPU Frequency scaling drivers
         [*]   AMD Processor P-state driver


    <*>   ACPI Processor P-States driver
    [ /*]     Legacy cpb sysfs knob support for AMD CPUs
    < >   AMD Opteron/Athlon64 PowerNow!
    <*>   AMD frequency sensitivity feedback powersave bias
Device Drivers  --->
  Generic Driver Options --->
    (amd-ucode/microcode_amd_fam17h.bin) External firmware blobs to build into the kernel binary
    (/lib/firmware) Firware blobs root directory
  [*] IOMMU Hardware Support  --->
    [*]   AMD IOMMU support
    <*>     AMD IOMMU Version 2 driver

在编译内核之后，cpufreq使用的驱动程序是

driver: acpi-cpufreq  

我已将acpi-cpufreq列入黑名单，并在引导时添加到内核的加载线中。将amd-pstate插入到

modprobe amd-pstate  

它似乎正在装货，但终端上什么也没有。

然后如何编译和启用这些模块。我有大量的ryzens，也许还会买更多，所以节省一点电力可能会很有趣。谢谢。

Answer 1

您试过使用amd_pstate.enable=1作为GRUB参数吗？

来源：https://www.phoronix.com/forums/forum/hardware/processors-memory/1297365-amd-p-state-cpu-frequency-control-driver-revised-a-6th-time?p=1297378#post1297378