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AMD Pstate Driver Fixes and Improvements
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Hello everyone, This patchset addresses critical issues and enhances performance settings for CPUs with heterogeneous core types in the AMD pstate driver. Specifically, it resolves problems related to calculating the highest performance and frequency on the latest CPUs with preferred cores. Additionally, the patchset includes documentation improvements in amd-pstate.rst, offering a comprehensive guide covering topics such as recommended reboot requirements during driver switching, debugging procedures for driver loading failures. Your feedback and suggestions for improvement are highly appreciated. Please review the patches and provide your valuable input. Thank you. Best regards, Perry. Changes from V1: * drop patch 11 which has been merged in a separate patch. (Mario) * fix some typos in commit log and tile (Mario) * fix the patch 11 regression issue of kernel command line (Oleksandr Natalenko) * pick ack flag for patch 7 (Mario) * drop patch 4 which is not recommended for user(Mario) * rebase to linux-pm/bleeding-edge branch * fix some build warning * rework the patch 3 for CPU ID matching(Mario) * address feedback for patch 5 (Mario) * move the acpi pm profile after got default mode(Mario) Perry Yuan (10): cpufreq: amd-pstate: optimize the initial frequency values verification cpufreq: amd-pstate: remove unused variable nominal_freq cpufreq: amd-pstate: show CPPC debug message if CPPC is not supported cpufreq: amd-pstate: add debug message while CPPC is supported and disabled by SBIOS Documentation: PM: amd-pstate: add debugging section for driver loading failure Documentation: PM: amd-pstate: add guided mode to the Operation mode cpufreq: amd-pstate: switch boot_cpu_has() to cpu_feature_enabled() x86/cpufeatures: Add feature bits for AMD heterogeneous processor cpufreq: amd-pstate: implement heterogeneous core topology for highest performance initialization cpufreq: amd-pstate: automatically load pstate driver by default Documentation/admin-guide/pm/amd-pstate.rst | 15 +- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/processor.h | 2 + arch/x86/kernel/cpu/amd.c | 19 ++ arch/x86/kernel/cpu/scattered.c | 1 + drivers/cpufreq/amd-pstate.c | 209 +++++++++++++------- include/linux/amd-pstate.h | 8 + 7 files changed, 181 insertions(+), 74 deletions(-)