Description: information about CPUs heterogeneity.
cpu_capacity: capacity of cpu#.
+
+What: /sys/devices/system/cpu/vulnerabilities
+ /sys/devices/system/cpu/vulnerabilities/meltdown
+ /sys/devices/system/cpu/vulnerabilities/spectre_v1
+ /sys/devices/system/cpu/vulnerabilities/spectre_v2
+ /sys/devices/system/cpu/vulnerabilities/spec_store_bypass
+ /sys/devices/system/cpu/vulnerabilities/l1tf
+ /sys/devices/system/cpu/vulnerabilities/mds
+Date: January 2018
+Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description: Information about CPU vulnerabilities
+
+ The files are named after the code names of CPU
+ vulnerabilities. The output of those files reflects the
+ state of the CPUs in the system. Possible output values:
+
+ "Not affected" CPU is not affected by the vulnerability
+ "Vulnerable" CPU is affected and no mitigation in effect
+ "Mitigation: $M" CPU is affected and mitigation $M is in effect
+
+ See also: Documentation/admin-guide/hw-vuln/index.rst
+
+What: /sys/devices/system/cpu/smt
+ /sys/devices/system/cpu/smt/active
+ /sys/devices/system/cpu/smt/control
+Date: June 2018
+Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description: Control Symetric Multi Threading (SMT)
+
+ active: Tells whether SMT is active (enabled and siblings online)
+
+ 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
+
+ If control status is "forceoff" or "notsupported" writes
+ are rejected.