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+What: /sys/hypervisor/pmu/pmu_mode
+Date: August 2015
+KernelVersion: 4.3
+Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
+Description:
+ Describes mode that Xen's performance-monitoring unit (PMU)
+ uses. Accepted values are
+ "off" -- PMU is disabled
+ "self" -- The guest can profile itself
+ "hv" -- The guest can profile itself and, if it is
+ privileged (e.g. dom0), the hypervisor
+ "all" -- The guest can profile itself, the hypervisor
+ and all other guests. Only available to
+ privileged guests.
+
+What: /sys/hypervisor/pmu/pmu_features
+Date: August 2015
+KernelVersion: 4.3
+Contact: Boris Ostrovsky <boris.ostrovsky@oracle.com>
+Description:
+ Describes Xen PMU features (as an integer). A set bit indicates
+ that the corresponding feature is enabled. See
+ include/xen/interface/xenpmu.h for available features