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Kconfig.i386

Kconfig.i386 2.0 KB
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  1. menu "Host processor type and features"
    2. 

  2. 

  3. source "arch/x86/Kconfig.cpu"
    4. 

  4. 

  5. endmenu
    6. 

  6. 

  7. config UML_X86
    8. 

  8. 	bool
    9. 

  9. 	default y
    10. 

  10. 

  11. config X86_32
    12. 

  12.        bool
    13. 

  13.        default y
    14. 

  14. 

  15. config RWSEM_XCHGADD_ALGORITHM
    16. 

  16. 	def_bool y
    17. 

  17. 

  18. config 64BIT
    19. 

  19. 	bool
    20. 

  20. 	default n
    21. 

  21. 

  22. config SEMAPHORE_SLEEPERS
    23. 

  23. 	bool
    24. 

  24. 	default y
    25. 

  25. 

  26. choice
    27. 

  27. 	prompt "Host memory split"
    28. 

  28. 	default HOST_VMSPLIT_3G
    29. 

  29. 	help
    30. 

  30.         This is needed when the host kernel on which you run has a non-default
    31. 

  31. 	(like 2G/2G) memory split, instead of the customary 3G/1G. If you did
    32. 

  32. 	not recompile your own kernel but use the default distro's one, you can
    33. 

  33. 	safely accept the "Default split" option.
    34. 

  34. 

  35. 	It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
    36. 

  36. 	CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
    37. 

  37. 	patchset by Con Kolivas, or other ones) - option names match closely the
    38. 

  38. 	host CONFIG_VM_SPLIT_* ones.
    39. 

  39. 

  40. 	A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
    41. 

  41. 	tolerate even more "normal" host kernels, but an higher setting will be
    42. 

  42. 	stricter.
    43. 

  43. 

  44. 	So, if you do not know what to do here, say 'Default split'.
    45. 

  45. 

  46. config HOST_VMSPLIT_3G
    47. 

  47. 	bool "Default split (3G/1G user/kernel host split)"
    48. 

  48. config HOST_VMSPLIT_3G_OPT
    49. 

  49. 	bool "3G/1G user/kernel host split (for full 1G low memory)"
    50. 

  50. config HOST_VMSPLIT_2G
    51. 

  51. 	bool "2G/2G user/kernel host split"
    52. 

  52. config HOST_VMSPLIT_1G
    53. 

  53. 	bool "1G/3G user/kernel host split"
    54. 

  54. endchoice
    55. 

  55. 

  56. config TOP_ADDR
    57. 

  57. 	hex
    58. 

  58. 	default 0xB0000000 if HOST_VMSPLIT_3G_OPT
    59. 

  59. 	default 0x78000000 if HOST_VMSPLIT_2G
    60. 

  60. 	default 0x40000000 if HOST_VMSPLIT_1G
    61. 

  61. 	default 0xC0000000
    62. 

  62. 

  63. config 3_LEVEL_PGTABLES
    64. 

  64. 	bool "Three-level pagetables (EXPERIMENTAL)"
    65. 

  65. 	default n
    66. 

  66. 	depends on EXPERIMENTAL
    67. 

  67. 	help
    68. 

  68. 	Three-level pagetables will let UML have more than 4G of physical
    69. 

  69. 	memory.  All the memory that can't be mapped directly will be treated
    70. 

  70. 	as high memory.
    71. 

  71. 

  72. 	However, this it experimental on 32-bit architectures, so if unsure say
    73. 

  73. 	N (on x86-64 it's automatically enabled, instead, as it's safe there).
    74. 

  74. 

  75. config ARCH_HAS_SC_SIGNALS
    76. 

  76. 	bool
    77. 

  77. 	default y
    78. 

  78. 

  79. config ARCH_REUSE_HOST_VSYSCALL_AREA
    80. 

  80. 	bool
    81. 

  81. 	default y
    82. 

  82. 

  83. config GENERIC_HWEIGHT
    84. 

  84. 	bool
    85. 

  85. 	default y
    86. 

  86.