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
  17 config 64BIT
  18         bool "64-bit kernel" if SUBARCH = "x86"
  19         default SUBARCH != "i386"
  20
  21 config X86_32
  22         def_bool !64BIT
  23         select HAVE_AOUT
  24         select ARCH_WANT_IPC_PARSE_VERSION
  25         select MODULES_USE_ELF_REL
  26         select CLONE_BACKWARDS
  27         select OLD_SIGSUSPEND3
  28         select OLD_SIGACTION
  29
  30 config X86_64
  31         def_bool 64BIT
  32         select MODULES_USE_ELF_RELA
  33
  34 config ARCH_DEFCONFIG
  35         string
  36         default "arch/um/configs/i386_defconfig" if X86_32
  37         default "arch/um/configs/x86_64_defconfig" if X86_64
  38
  39 config RWSEM_XCHGADD_ALGORITHM
  40         def_bool 64BIT
  41
  42 config RWSEM_GENERIC_SPINLOCK
  43         def_bool !RWSEM_XCHGADD_ALGORITHM
  44
  45 config 3_LEVEL_PGTABLES
  46         bool "Three-level pagetables" if !64BIT
  47         default 64BIT
  48         help
  49         Three-level pagetables will let UML have more than 4G of physical
  50         memory.  All the memory that can't be mapped directly will be treated
  51         as high memory.
  52
  53         However, this it experimental on 32-bit architectures, so if unsure say
  54         N (on x86-64 it's automatically enabled, instead, as it's safe there).
  55
  56 config ARCH_HAS_SC_SIGNALS
  57         def_bool !64BIT
  58
  59 config ARCH_REUSE_HOST_VSYSCALL_AREA
  60         def_bool !64BIT
  61
  62 config GENERIC_HWEIGHT
  63         def_bool y
  64
  65 source "arch/um/Kconfig.um"
  66
  67 endmenu
  68
  69 source "arch/um/Kconfig.rest"