arch/x86/um/Kconfig

   1 mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration"
   2
   3 source "arch/um/Kconfig.common"
   4
   5 menu "UML-specific options"
   6
   7 menu "Host processor type and features"
   8
   9 source "arch/x86/Kconfig.cpu"
  10
  11 endmenu
  12
  13 config UML_X86
  14         def_bool y
  15         select GENERIC_FIND_FIRST_BIT
  16
  17 config 64BIT
  18         bool "64-bit kernel" if SUBARCH = "x86"
  19         default SUBARCH != "i386"
  20
  21 config X86_32
  22         def_bool !64BIT
  23         select HAVE_AOUT
  24
  25 config X86_64
  26         def_bool 64BIT
  27
  28 config RWSEM_XCHGADD_ALGORITHM
  29         def_bool X86_XADD && 64BIT
  30
  31 config RWSEM_GENERIC_SPINLOCK
  32         def_bool !RWSEM_XCHGADD_ALGORITHM
  33
  34 config 3_LEVEL_PGTABLES
  35         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  36         default 64BIT
  37         depends on EXPERIMENTAL
  38         help
  39         Three-level pagetables will let UML have more than 4G of physical
  40         memory.  All the memory that can't be mapped directly will be treated
  41         as high memory.
  42
  43         However, this it experimental on 32-bit architectures, so if unsure say
  44         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  45
  46 config ARCH_HAS_SC_SIGNALS
  47         def_bool !64BIT
  48
  49 config ARCH_REUSE_HOST_VSYSCALL_AREA
  50         def_bool !64BIT
  51
  52 config GENERIC_HWEIGHT
  53         def_bool y
  54
  55 source "arch/um/Kconfig.um"
  56
  57 endmenu
  58
  59 source "arch/um/Kconfig.rest"