arch/um/Kconfig.x86

   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 config CMPXCHG_LOCAL
  10         bool
  11         default n
  12
  13 source "arch/x86/Kconfig.cpu"
  14
  15 endmenu
  16
  17 config UML_X86
  18         def_bool y
  19         select GENERIC_FIND_FIRST_BIT
  20
  21 config 64BIT
  22         bool
  23         default SUBARCH = "x86_64"
  24
  25 config X86_32
  26         def_bool !64BIT
  27         select HAVE_AOUT
  28
  29 config X86_64
  30         def_bool 64BIT
  31
  32 config RWSEM_XCHGADD_ALGORITHM
  33         def_bool X86_XADD && 64BIT
  34
  35 config RWSEM_GENERIC_SPINLOCK
  36         def_bool !RWSEM_XCHGADD_ALGORITHM
  37
  38 config 3_LEVEL_PGTABLES
  39         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  40         default 64BIT
  41         depends on EXPERIMENTAL
  42         help
  43         Three-level pagetables will let UML have more than 4G of physical
  44         memory.  All the memory that can't be mapped directly will be treated
  45         as high memory.
  46
  47         However, this it experimental on 32-bit architectures, so if unsure say
  48         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  49
  50 config ARCH_HAS_SC_SIGNALS
  51         def_bool !64BIT
  52
  53 config ARCH_REUSE_HOST_VSYSCALL_AREA
  54         def_bool !64BIT
  55
  56 config SMP_BROKEN
  57         def_bool 64BIT
  58
  59 config GENERIC_HWEIGHT
  60         def_bool y
  61
  62 source "arch/um/Kconfig.um"
  63
  64 endmenu
  65
  66 source "arch/um/Kconfig.rest"