arch/um/Kconfig.x86

   1 source "arch/um/Kconfig.common"
   2
   3 menu "UML-specific options"
   4
   5 menu "Host processor type and features"
   6
   7 source "arch/x86/Kconfig.cpu"
   8
   9 endmenu
  10
  11 config UML_X86
  12         def_bool y
  13         select GENERIC_FIND_FIRST_BIT
  14         select GENERIC_FIND_NEXT_BIT
  15
  16 config 64BIT
  17         bool
  18         default SUBARCH = "x86_64"
  19
  20 config X86_32
  21         def_bool !64BIT
  22         select HAVE_AOUT
  23
  24 config X86_64
  25         def_bool 64BIT
  26
  27 config RWSEM_XCHGADD_ALGORITHM
  28         def_bool X86_XADD
  29
  30 config RWSEM_GENERIC_SPINLOCK
  31         def_bool !X86_XADD
  32
  33 config 3_LEVEL_PGTABLES
  34         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  35         default 64BIT
  36         depends on EXPERIMENTAL
  37         help
  38         Three-level pagetables will let UML have more than 4G of physical
  39         memory.  All the memory that can't be mapped directly will be treated
  40         as high memory.
  41
  42         However, this it experimental on 32-bit architectures, so if unsure say
  43         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  44
  45 config ARCH_HAS_SC_SIGNALS
  46         def_bool !64BIT
  47
  48 config ARCH_REUSE_HOST_VSYSCALL_AREA
  49         def_bool !64BIT
  50
  51 config SMP_BROKEN
  52         def_bool 64BIT
  53
  54 config GENERIC_HWEIGHT
  55         def_bool y
  56
  57 source "arch/um/Kconfig.um"
  58
  59 endmenu
  60
  61 source "arch/um/Kconfig.rest"