x86/cpufeatures: Add AMD FAST CPPC feature flag

Browse source

Some AMD Zen 4 processors support a new feature FAST CPPC which
allows for a faster CPPC loop due to internal architectural
enhancements. The goal of this faster loop is higher performance
at the same power consumption.

Reference:
See the page 99 of PPR for AMD Family 19h Model 61h rev.B1, docID 56713

Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Xiaojian Du <Xiaojian.Du@amd.com>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>

...

This commit is contained in:

Perry Yuan 2024-05-25 23:08:43 +08:00 • committed by Mario Limonciello

parent 83a7eefedc

commit c7107750b2

2 changed files with 2 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/x86/include/asm/cpufeatures.h

View file

1

arch/x86/kernel/cpu/scattered.c

View file