Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

[sfrench/cifs-2.6.git] / Documentation / ABI / testing / sysfs-devices-system-cpu

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 9605dbd4b5b59ecc251913b1b327e6031cfb875f..4fb76c0e8d30a147a200de73e415d8df665e95c5 100644 (file)
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -511,10 +511,30 @@ Description:      Control Symetric Multi Threading (SMT)
                control: Read/write interface to control SMT. Possible
                         values:
 
-                        "on"           SMT is enabled
-                        "off"          SMT is disabled
-                        "forceoff"     SMT is force disabled. Cannot be changed.
-                        "notsupported" SMT is not supported by the CPU
+                        "on"             SMT is enabled
+                        "off"            SMT is disabled
+                        "forceoff"       SMT is force disabled. Cannot be changed.
+                        "notsupported"   SMT is not supported by the CPU
+                        "notimplemented" SMT runtime toggling is not
+                                         implemented for the architecture
 
                         If control status is "forceoff" or "notsupported" writes
                         are rejected.
+
+What:          /sys/devices/system/cpu/cpu#/power/energy_perf_bias
+Date:          March 2019
+Contact:       linux-pm@vger.kernel.org
+Description:   Intel Energy and Performance Bias Hint (EPB)
+
+               EPB for the given CPU in a sliding scale 0 - 15, where a value
+               of 0 corresponds to a hint preference for highest performance
+               and a value of 15 corresponds to the maximum energy savings.
+
+               In order to change the EPB value for the CPU, write either
+               a number in the 0 - 15 sliding scale above, or one of the
+               strings: "performance", "balance-performance", "normal",
+               "balance-power", "power" (that represent values reflected by
+               their meaning), to this attribute.
+
+               This attribute is present for all online CPUs supporting the
+               Intel EPB feature.