Files
erofs-linux/drivers/cpufreq
Gautham R. Shenoy 9c68a3b03e cpufreq/amd-pstate: Remove warning for X86_FEATURE_CPPC on certain Zen models
commit bff7d13c19 ("cpufreq: amd-pstate: add debug message while
CPPC is supported and disabled by SBIOS") issues a warning on plaforms
where the X86_FEATURE_CPPC is expected to be enabled, but is not due
to it being disabled in the BIOS.

This feature bit corresponds to CPUID 0x80000008.ebx[27] which is a
reserved bit on the Zen1 processors and a reserved bit on Zen2 based
models 0x70-0x7F, and is expected to be cleared on these
platforms. Thus printing the warning message for these models when
X86_FEATURE_CPPC is unavailable is incorrect. Fix this.

Modify some of the comments, and use switch-case for model range
checking for improved readability while at it.

Fixes: bff7d13c19 ("cpufreq: amd-pstate: add debug message while CPPC is supported and disabled by SBIOS")
Cc: Xiaojian Du <[email protected]>
Reported-by: David Wang <[email protected]>
Closes: https://lore.kernel.org/lkml/[email protected]/
Signed-off-by: Gautham R. Shenoy <[email protected]>
Acked-by: Mario Limonciello <[email protected]>
Signed-off-by: Mario Limonciello <[email protected]>
2024-08-28 10:15:00 -05:00
..
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2024-07-09 08:45:43 +05:30