[RFC PATCH 0/4] Add processor to the ignore PSD override list

Punit Agrawal
2020-11-25T14:49:00Z

Hi,

While looking into Giovanni's patches to enable frequency invariance
on AMD systems[0], I noticed an issue with initialising frequency
domain information on a recent AMD APU.

Patch 1 refactors the test to ignore firmware provided frequency
domain into a separate function.

Patch 2 adds said APU (Family: 0x17, Model: 0x60, Stepping: 0x01) to
the list of CPUs for which the PSD override is ignored. I am not quite
happy with having to special case a particular CPU but also couldn't
find any documentation to help identify the CPUs that don't need the
override.

Patch 3 and 4 are somewhat independent and a first step towards
improving the situation with regards to the use of raw identifiers for
AMD processors throughout the kernel.

All feedback welcome.

Thanks,
Punit

[0] https://lore.kernel.org/linux-acpi/20201112182614.10700-1-ggherdovich@suse.cz/

Punit Agrawal (4):
cpufreq: acpi-cpufreq: Re-factor overriding ACPI PSD
cpufreq: acpi-cpufreq: Add processor to the ignore PSD override list
x86/cpu: amd: Define processor families
cpufreq: acpi-cpufreq: Use identifiers for AMD processor family

arch/x86/include/asm/amd-family.h | 18 ++++++++++++++++++
arch/x86/include/asm/cpu_device_id.h | 2 ++
drivers/cpufreq/acpi-cpufreq.c | 24 +++++++++++++++++++++---
3 files changed, 41 insertions(+), 3 deletions(-)
create mode 100644 arch/x86/include/asm/amd-family.h

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2.29.2