drivers/xen/Kconfig

   1 menu "Xen driver support"
   2         depends on XEN
   3
   4 config XEN_BALLOON
   5         bool "Xen memory balloon driver"
   6         default y
   7         help
   8           The balloon driver allows the Xen domain to request more memory from
   9           the system to expand the domain's memory allocation, or alternatively
  10           return unneeded memory to the system.
  11
  12 config XEN_SCRUB_PAGES
  13         bool "Scrub pages before returning them to system"
  14         depends on XEN_BALLOON
  15         default y
  16         help
  17           Scrub pages before returning them to the system for reuse by
  18           other domains.  This makes sure that any confidential data
  19           is not accidentally visible to other domains.  Is it more
  20           secure, but slightly less efficient.
  21           If in doubt, say yes.
  22
  23 config XEN_DEV_EVTCHN
  24         tristate "Xen /dev/xen/evtchn device"
  25         default y
  26         help
  27           The evtchn driver allows a userspace process to triger event
  28           channels and to receive notification of an event channel
  29           firing.
  30           If in doubt, say yes.
  31
  32 config XENFS
  33         tristate "Xen filesystem"
  34         default y
  35         help
  36           The xen filesystem provides a way for domains to share
  37           information with each other and with the hypervisor.
  38           For example, by reading and writing the "xenbus" file, guests
  39           may pass arbitrary information to the initial domain.
  40           If in doubt, say yes.
  41
  42 config XEN_COMPAT_XENFS
  43        bool "Create compatibility mount point /proc/xen"
  44        depends on XENFS
  45        default y
  46        help
  47          The old xenstore userspace tools expect to find "xenbus"
  48          under /proc/xen, but "xenbus" is now found at the root of the
  49          xenfs filesystem.  Selecting this causes the kernel to create
  50          the compatibility mount point /proc/xen if it is running on
  51          a xen platform.
  52          If in doubt, say yes.
  53
  54 config XEN_SYS_HYPERVISOR
  55        bool "Create xen entries under /sys/hypervisor"
  56        depends on SYSFS
  57        select SYS_HYPERVISOR
  58        default y
  59        help
  60          Create entries under /sys/hypervisor describing the Xen
  61          hypervisor environment.  When running native or in another
  62          virtual environment, /sys/hypervisor will still be present,
  63          but will have no xen contents.
  64
  65 config XEN_PLATFORM_PCI
  66         tristate "xen platform pci device driver"
  67         depends on XEN_PVHVM
  68         default m
  69         help
  70           Driver for the Xen PCI Platform device: it is responsible for
  71           initializing xenbus and grant_table when running in a Xen HVM
  72           domain. As a consequence this driver is required to run any Xen PV
  73           frontend on Xen HVM.
  74
  75 config SWIOTLB_XEN
  76         def_bool y
  77         depends on SWIOTLB
  78
  79 endmenu