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 config CMPXCHG_DOUBLE
  14         bool
  15         default n
  16
  17 source "arch/x86/Kconfig.cpu"
  18
  19 endmenu
  20
  21 config UML_X86
  22         def_bool y
  23         select GENERIC_FIND_FIRST_BIT
  24
  25 config 64BIT
  26         bool
  27         default SUBARCH = "x86_64"
  28
  29 config X86_32
  30         def_bool !64BIT
  31         select HAVE_AOUT
  32
  33 config X86_64
  34         def_bool 64BIT
  35
  36 config RWSEM_XCHGADD_ALGORITHM
  37         def_bool X86_XADD && 64BIT
  38
  39 config RWSEM_GENERIC_SPINLOCK
  40         def_bool !RWSEM_XCHGADD_ALGORITHM
  41
  42 config 3_LEVEL_PGTABLES
  43         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  44         default 64BIT
  45         depends on EXPERIMENTAL
  46         help
  47         Three-level pagetables will let UML have more than 4G of physical
  48         memory.  All the memory that can't be mapped directly will be treated
  49         as high memory.
  50
  51         However, this it experimental on 32-bit architectures, so if unsure say
  52         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  53
  54 config ARCH_HAS_SC_SIGNALS
  55         def_bool !64BIT
  56
  57 config ARCH_REUSE_HOST_VSYSCALL_AREA
  58         def_bool !64BIT
  59
  60 config SMP_BROKEN
  61         def_bool 64BIT
  62
  63 config GENERIC_HWEIGHT
  64         def_bool y
  65
  66 source "arch/um/Kconfig.um"
  67
  68 endmenu
  69
  70 source "arch/um/Kconfig.rest"