arch/um/Kconfig.x86

   1 menu "Host processor type and features"
   2
   3 source "arch/x86/Kconfig.cpu"
   4
   5 endmenu
   6
   7 config UML_X86
   8         def_bool y
   9
  10 config 64BIT
  11         bool
  12         default SUBARCH = "x86_64"
  13
  14 config X86_32
  15         def_bool !64BIT
  16         select HAVE_AOUT
  17
  18 config RWSEM_XCHGADD_ALGORITHM
  19         def_bool X86_XADD
  20
  21 config RWSEM_GENERIC_SPINLOCK
  22         def_bool !X86_XADD
  23
  24 config 3_LEVEL_PGTABLES
  25         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  26         default 64BIT
  27         depends on EXPERIMENTAL
  28         help
  29         Three-level pagetables will let UML have more than 4G of physical
  30         memory.  All the memory that can't be mapped directly will be treated
  31         as high memory.
  32
  33         However, this it experimental on 32-bit architectures, so if unsure say
  34         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  35
  36 config ARCH_HAS_SC_SIGNALS
  37         def_bool !64BIT
  38
  39 config ARCH_REUSE_HOST_VSYSCALL_AREA
  40         def_bool !64BIT
  41
  42 config SMP_BROKEN
  43         def_bool 64BIT
  44
  45 config GENERIC_HWEIGHT
  46         def_bool y