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-rw-r--r--Documentation/cpu-freq/intel-pstate.txt8
-rw-r--r--Documentation/kernel-parameters.txt3
2 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt
index 765d7fc0e692..655750743fb0 100644
--- a/Documentation/cpu-freq/intel-pstate.txt
+++ b/Documentation/cpu-freq/intel-pstate.txt
@@ -37,6 +37,14 @@ controlling P state selection. These files have been added to
no_turbo: limits the driver to selecting P states below the turbo
frequency range.
+ turbo_pct: displays the percentage of the total performance that
+ is supported by hardware that is in the turbo range. This number
+ is independent of whether turbo has been disabled or not.
+
+ num_pstates: displays the number of pstates that are supported
+ by hardware. This number is independent of whether turbo has
+ been disabled or not.
+
For contemporary Intel processors, the frequency is controlled by the
processor itself and the P-states exposed to software are related to
performance levels. The idea that frequency can be set to a single
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 176d4fe4f076..f06f1f609cb7 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1470,6 +1470,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
no_hwp
Do not enable hardware P state control (HWP)
if available.
+ hwp_only
+ Only load intel_pstate on systems which support
+ hardware P state control (HWP) if available.
intremap= [X86-64, Intel-IOMMU]
on enable Interrupt Remapping (default)