arch/um/Kconfig

   1 config DEFCONFIG_LIST
   2         string
   3         option defconfig_list
   4         default "arch/$ARCH/defconfig"
   5
   6 # UML uses the generic IRQ subsystem
   7 config GENERIC_HARDIRQS
   8         bool
   9         default y
  10
  11 config UML
  12         bool
  13         default y
  14
  15 config MMU
  16         bool
  17         default y
  18
  19 config NO_IOMEM
  20         def_bool y
  21
  22 mainmenu "Linux/Usermode Kernel Configuration"
  23
  24 config ISA
  25         bool
  26
  27 config SBUS
  28         bool
  29
  30 config PCI
  31         bool
  32
  33 config PCMCIA
  34         bool
  35
  36 # Yet to do!
  37 config TRACE_IRQFLAGS_SUPPORT
  38         bool
  39         default n
  40
  41 config LOCKDEP_SUPPORT
  42         bool
  43         default y
  44
  45 config STACKTRACE_SUPPORT
  46         bool
  47         default n
  48
  49 config GENERIC_CALIBRATE_DELAY
  50         bool
  51         default y
  52
  53 config GENERIC_BUG
  54         bool
  55         default y
  56         depends on BUG
  57
  58 config GENERIC_TIME
  59         bool
  60         default y
  61
  62 config GENERIC_CLOCKEVENTS
  63         bool
  64         default y
  65
  66 # Used in kernel/irq/manage.c and include/linux/irq.h
  67 config IRQ_RELEASE_METHOD
  68         bool
  69         default y
  70
  71 config HZ
  72         int
  73         default 100
  74
  75 menu "UML-specific options"
  76
  77 config STATIC_LINK
  78         bool "Force a static link"
  79         default n
  80         help
  81           This option gives you the ability to force a static link of UML.
  82           Normally, UML is linked as a shared binary.  This is inconvenient for
  83           use in a chroot jail.  So, if you intend to run UML inside a chroot,
  84           you probably want to say Y here.
  85           Additionally, this option enables using higher memory spaces (up to
  86           2.75G) for UML.
  87
  88 config SUBARCH
  89         string
  90         option env="SUBARCH"
  91
  92 source "arch/um/Kconfig.arch"
  93 source "mm/Kconfig"
  94 source "kernel/time/Kconfig"
  95
  96 config LD_SCRIPT_STATIC
  97         bool
  98         default y
  99         depends on STATIC_LINK
 100
 101 config LD_SCRIPT_DYN
 102         bool
 103         default y
 104         depends on !LD_SCRIPT_STATIC
 105
 106 source "fs/Kconfig.binfmt"
 107
 108 config HOSTFS
 109         tristate "Host filesystem"
 110         help
 111           While the User-Mode Linux port uses its own root file system for
 112           booting and normal file access, this module lets the UML user
 113           access files stored on the host.  It does not require any
 114           network connection between the Host and UML.  An example use of
 115           this might be:
 116
 117           mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
 118
 119           where /tmp/fromhost is an empty directory inside UML and
 120           /tmp/umlshare is a directory on the host with files the UML user
 121           wishes to access.
 122
 123           For more information, see
 124           <http://user-mode-linux.sourceforge.net/hostfs.html>.
 125
 126           If you'd like to be able to work with files stored on the host,
 127           say Y or M here; otherwise say N.
 128
 129 config HPPFS
 130         tristate "HoneyPot ProcFS (EXPERIMENTAL)"
 131         depends on EXPERIMENTAL
 132         help
 133           hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
 134           entries to be overridden, removed, or fabricated from the host.
 135           Its purpose is to allow a UML to appear to be a physical machine
 136           by removing or changing anything in /proc which gives away the
 137           identity of a UML.
 138
 139           See <http://user-mode-linux.sf.net/old/hppfs.html> for more information.
 140
 141           You only need this if you are setting up a UML honeypot.  Otherwise,
 142           it is safe to say 'N' here.
 143
 144 config MCONSOLE
 145         bool "Management console"
 146         default y
 147         help
 148           The user mode linux management console is a low-level interface to
 149           the kernel, somewhat like the i386 SysRq interface.  Since there is
 150           a full-blown operating system running under every user mode linux
 151           instance, there is much greater flexibility possible than with the
 152           SysRq mechanism.
 153
 154           If you answer 'Y' to this option, to use this feature, you need the
 155           mconsole client (called uml_mconsole) which is present in CVS in
 156           2.4.5-9um and later (path /tools/mconsole), and is also in the
 157           distribution RPM package in 2.4.6 and later.
 158
 159           It is safe to say 'Y' here.
 160
 161 config MAGIC_SYSRQ
 162         bool "Magic SysRq key"
 163         depends on MCONSOLE
 164         help
 165           If you say Y here, you will have some control over the system even
 166           if the system crashes for example during kernel debugging (e.g., you
 167           will be able to flush the buffer cache to disk, reboot the system
 168           immediately or dump some status information). A key for each of the
 169           possible requests is provided.
 170
 171           This is the feature normally accomplished by pressing a key
 172           while holding SysRq (Alt+PrintScreen).
 173
 174           On UML, this is accomplished by sending a "sysrq" command with
 175           mconsole, followed by the letter for the requested command.
 176
 177           The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
 178           unless you really know what this hack does.
 179
 180 config SMP
 181         bool "Symmetric multi-processing support (EXPERIMENTAL)"
 182         default n
 183         depends on BROKEN
 184         help
 185           This option enables UML SMP support.
 186           It is NOT related to having a real SMP box. Not directly, at least.
 187
 188           UML implements virtual SMP by allowing as many processes to run
 189           simultaneously on the host as there are virtual processors configured.
 190
 191           Obviously, if the host is a uniprocessor, those processes will
 192           timeshare, but, inside UML, will appear to be running simultaneously.
 193           If the host is a multiprocessor, then UML processes may run
 194           simultaneously, depending on the host scheduler.
 195
 196           This, however, is supported only in TT mode. So, if you use the SKAS
 197           patch on your host, switching to TT mode and enabling SMP usually
 198           gives you worse performances.
 199           Also, since the support for SMP has been under-developed, there could
 200           be some bugs being exposed by enabling SMP.
 201
 202           If you don't know what to do, say N.
 203
 204 config NR_CPUS
 205         int "Maximum number of CPUs (2-32)"
 206         range 2 32
 207         depends on SMP
 208         default "32"
 209
 210 config HIGHMEM
 211         bool "Highmem support (EXPERIMENTAL)"
 212         depends on !64BIT && EXPERIMENTAL
 213         default n
 214         help
 215           This was used to allow UML to run with big amounts of memory.
 216           Currently it is unstable, so if unsure say N.
 217
 218           To use big amounts of memory, it is recommended enable static
 219           linking (i.e. CONFIG_STATIC_LINK) - this should allow the
 220           guest to use up to 2.75G of memory.
 221
 222 config KERNEL_STACK_ORDER
 223         int "Kernel stack size order"
 224         default 1 if 64BIT
 225         range 1 10 if 64BIT
 226         default 0 if !64BIT
 227         help
 228           This option determines the size of UML kernel stacks.  They will
 229           be 1 << order pages.  The default is OK unless you're running Valgrind
 230           on UML, in which case, set this to 3.
 231
 232 endmenu
 233
 234 source "init/Kconfig"
 235
 236 source "kernel/Kconfig.freezer"
 237
 238 source "drivers/block/Kconfig"
 239
 240 source "arch/um/Kconfig.char"
 241
 242 source "drivers/base/Kconfig"
 243
 244 source "net/Kconfig"
 245
 246 source "arch/um/Kconfig.net"
 247
 248 source "drivers/net/Kconfig"
 249
 250 source "drivers/connector/Kconfig"
 251
 252 source "fs/Kconfig"
 253
 254 source "security/Kconfig"
 255
 256 source "crypto/Kconfig"
 257
 258 source "lib/Kconfig"
 259
 260 source "drivers/scsi/Kconfig"
 261
 262 source "drivers/md/Kconfig"
 263
 264 if BROKEN
 265         source "drivers/mtd/Kconfig"
 266 endif
 267
 268 source "drivers/leds/Kconfig"
 269
 270 #This is just to shut up some Kconfig warnings, so no prompt.
 271 config INPUT
 272         bool
 273         default n
 274
 275 source "arch/um/Kconfig.debug"