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cpufreq: intel_pstate: Enable PPC enforcement for servers

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For platforms which are controlled via remove node manager, enable _PPC by
default. These platforms are mostly categorized as enterprise server or
performance servers. These platforms needs to go through some
certifications tests, which tests control via _PPC.
The relative risk of enabling by default is  low as this is is less likely
that these systems have broken _PSS table.

Signed-off-by: Srinivas Pandruvada <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Srinivas Pandruvada 2016-04-27 15:48:08 -07:00 • committed by Rafael J. Wysocki
commit 2b3ec76505
2 changed files with 15 additions and 2 deletions
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5
Documentation/kernel-parameters.txt
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@ -1662,7 +1662,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Only load intel_pstate on systems which support
hardware P state control (HWP) if available.
support_acpi_ppc
Enforce ACPI _PPC performance limits.
Enforce ACPI _PPC performance limits. If the Fixed ACPI
Description Table, specifies preferred power management
profile as "Enterprise Server" or "Performance Server",
then this feature is turned on by default.
intremap= [X86-64, Intel-IOMMU]
on enable Interrupt Remapping (default)