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+What: /sys/hypervisor/compilation/compile_date
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Contains the build time stamp of the Xen hypervisor
+ Might return "<denied>" in case of special security settings
+ in the hypervisor.
+
+What: /sys/hypervisor/compilation/compiled_by
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Contains information who built the Xen hypervisor
+ Might return "<denied>" in case of special security settings
+ in the hypervisor.
+
+What: /sys/hypervisor/compilation/compiler
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Compiler which was used to build the Xen hypervisor
+ Might return "<denied>" in case of special security settings
+ in the hypervisor.
+
+What: /sys/hypervisor/properties/capabilities
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Space separated list of supported guest system types. Each type
+ is in the format: <class>-<major>.<minor>-<arch>
+ With:
+
+ ======== ============================================
+ <class>: "xen" -- x86: paravirtualized, arm: standard
+ "hvm" -- x86 only: fully virtualized
+ <major>: major guest interface version
+ <minor>: minor guest interface version
+ <arch>: architecture, e.g.:
+ "x86_32": 32 bit x86 guest without PAE
+ "x86_32p": 32 bit x86 guest with PAE
+ "x86_64": 64 bit x86 guest
+ "armv7l": 32 bit arm guest
+ "aarch64": 64 bit arm guest
+ ======== ============================================
+
+What: /sys/hypervisor/properties/changeset
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Changeset of the hypervisor (git commit)
+ Might return "<denied>" in case of special security settings
+ in the hypervisor.
+
+What: /sys/hypervisor/properties/features
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Features the Xen hypervisor supports for the guest as defined
+ in include/xen/interface/features.h printed as a hex value.
+
+What: /sys/hypervisor/properties/pagesize
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Default page size of the hypervisor printed as a hex value.
+ Might return "0" in case of special security settings
+ in the hypervisor.
+
+What: /sys/hypervisor/properties/virtual_start
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Virtual address of the hypervisor as a hex value.
+
+What: /sys/hypervisor/type
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ Type of hypervisor:
+ "xen": Xen hypervisor
+
+What: /sys/hypervisor/uuid
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ UUID of the guest as known to the Xen hypervisor.
+
+What: /sys/hypervisor/version/extra
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ The Xen version is in the format <major>.<minor><extra>
+ This is the <extra> part of it.
+ Might return "<denied>" in case of special security settings
+ in the hypervisor.
+
+What: /sys/hypervisor/version/major
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ The Xen version is in the format <major>.<minor><extra>
+ This is the <major> part of it.
+
+What: /sys/hypervisor/version/minor
+Date: March 2009
+KernelVersion: 2.6.30
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ The Xen version is in the format <major>.<minor><extra>
+ This is the <minor> part of it.
+
+What: /sys/hypervisor/start_flags/*
+Date: March 2023
+KernelVersion: 6.3.0
+Contact: xen-devel@lists.xenproject.org
+Description: If running under Xen:
+ All bits in Xen's start-flags are represented as
+ boolean files, returning '1' if set, '0' otherwise.
+ This takes the place of the defunct /proc/xen/capabilities,
+ which would contain "control_d" on dom0, and be empty
+ otherwise. This flag is now exposed as "initdomain" in
+ addition to the "privileged" flag; all other possible flags
+ are accessible as "unknownXX".