arch/x86/um/Kconfig

   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 source "arch/x86/Kconfig.cpu"
  10
  11 endmenu
  12
  13 config UML_X86
  14         def_bool y
  15         select GENERIC_FIND_FIRST_BIT
  16         select GENERIC_KERNEL_THREAD
  17         select GENERIC_KERNEL_EXECVE
  18
  19 config 64BIT
  20         bool "64-bit kernel" if SUBARCH = "x86"
  21         default SUBARCH != "i386"
  22
  23 config X86_32
  24         def_bool !64BIT
  25         select HAVE_AOUT
  26         select ARCH_WANT_IPC_PARSE_VERSION
  27         select MODULES_USE_ELF_REL
  28         select CLONE_BACKWARDS
  29
  30 config X86_64
  31         def_bool 64BIT
  32         select MODULES_USE_ELF_RELA
  33
  34 config RWSEM_XCHGADD_ALGORITHM
  35         def_bool X86_XADD && 64BIT
  36
  37 config RWSEM_GENERIC_SPINLOCK
  38         def_bool !RWSEM_XCHGADD_ALGORITHM
  39
  40 config 3_LEVEL_PGTABLES
  41         bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
  42         default 64BIT
  43         depends on EXPERIMENTAL
  44         help
  45         Three-level pagetables will let UML have more than 4G of physical
  46         memory.  All the memory that can't be mapped directly will be treated
  47         as high memory.
  48
  49         However, this it experimental on 32-bit architectures, so if unsure say
  50         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  51
  52 config ARCH_HAS_SC_SIGNALS
  53         def_bool !64BIT
  54
  55 config ARCH_REUSE_HOST_VSYSCALL_AREA
  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"