arch/um/Kconfig.um

   1 config STATIC_LINK
   2         bool "Force a static link"
   3         default n
   4         help
   5           This option gives you the ability to force a static link of UML.
   6           Normally, UML is linked as a shared binary.  This is inconvenient for
   7           use in a chroot jail.  So, if you intend to run UML inside a chroot,
   8           you probably want to say Y here.
   9           Additionally, this option enables using higher memory spaces (up to
  10           2.75G) for UML.
  11
  12 source "mm/Kconfig"
  13
  14 config LD_SCRIPT_STATIC
  15         bool
  16         default y
  17         depends on STATIC_LINK
  18
  19 config LD_SCRIPT_DYN
  20         bool
  21         default y
  22         depends on !LD_SCRIPT_STATIC
  23
  24 source "fs/Kconfig.binfmt"
  25
  26 config HOSTFS
  27         tristate "Host filesystem"
  28         help
  29           While the User-Mode Linux port uses its own root file system for
  30           booting and normal file access, this module lets the UML user
  31           access files stored on the host.  It does not require any
  32           network connection between the Host and UML.  An example use of
  33           this might be:
  34
  35           mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
  36
  37           where /tmp/fromhost is an empty directory inside UML and
  38           /tmp/umlshare is a directory on the host with files the UML user
  39           wishes to access.
  40
  41           For more information, see
  42           <http://user-mode-linux.sourceforge.net/hostfs.html>.
  43
  44           If you'd like to be able to work with files stored on the host,
  45           say Y or M here; otherwise say N.
  46
  47 config HPPFS
  48         tristate "HoneyPot ProcFS"
  49         depends on PROC_FS
  50         help
  51           hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
  52           entries to be overridden, removed, or fabricated from the host.
  53           Its purpose is to allow a UML to appear to be a physical machine
  54           by removing or changing anything in /proc which gives away the
  55           identity of a UML.
  56
  57           See <http://user-mode-linux.sf.net/old/hppfs.html> for more information.
  58
  59           You only need this if you are setting up a UML honeypot.  Otherwise,
  60           it is safe to say 'N' here.
  61
  62 config MCONSOLE
  63         bool "Management console"
  64         default y
  65         help
  66           The user mode linux management console is a low-level interface to
  67           the kernel, somewhat like the i386 SysRq interface.  Since there is
  68           a full-blown operating system running under every user mode linux
  69           instance, there is much greater flexibility possible than with the
  70           SysRq mechanism.
  71
  72           If you answer 'Y' to this option, to use this feature, you need the
  73           mconsole client (called uml_mconsole) which is present in CVS in
  74           2.4.5-9um and later (path /tools/mconsole), and is also in the
  75           distribution RPM package in 2.4.6 and later.
  76
  77           It is safe to say 'Y' here.
  78
  79 config MAGIC_SYSRQ
  80         bool "Magic SysRq key"
  81         depends on MCONSOLE
  82         help
  83           If you say Y here, you will have some control over the system even
  84           if the system crashes for example during kernel debugging (e.g., you
  85           will be able to flush the buffer cache to disk, reboot the system
  86           immediately or dump some status information). A key for each of the
  87           possible requests is provided.
  88
  89           This is the feature normally accomplished by pressing a key
  90           while holding SysRq (Alt+PrintScreen).
  91
  92           On UML, this is accomplished by sending a "sysrq" command with
  93           mconsole, followed by the letter for the requested command.
  94
  95           The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
  96           unless you really know what this hack does.
  97
  98 config KERNEL_STACK_ORDER
  99         int "Kernel stack size order"
 100         default 1 if 64BIT
 101         range 1 10 if 64BIT
 102         default 0 if !64BIT
 103         help
 104           This option determines the size of UML kernel stacks.  They will
 105           be 1 << order pages.  The default is OK unless you're running Valgrind
 106           on UML, in which case, set this to 3.
 107
 108 config MMAPPER
 109         tristate "iomem emulation driver"
 110         help
 111           This driver allows a host file to be used as emulated IO memory inside
 112           UML.
 113
 114 config NO_DMA
 115         def_bool y
 116
 117 config PGTABLE_LEVELS
 118         int
 119         default 3 if 3_LEVEL_PGTABLES
 120         default 2