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