arch/x86_64/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config DEBUG_RODATA
   6        bool "Write protect kernel read-only data structures"
   7        depends on DEBUG_KERNEL
   8        help
   9          Mark the kernel read-only data as write-protected in the pagetables,
  10          in order to catch accidental (and incorrect) writes to such const data.
  11          This option may have a slight performance impact because a portion
  12          of the kernel code won't be covered by a 2MB TLB anymore.
  13          If in doubt, say "N".
  14
  15 config IOMMU_DEBUG
  16        depends on IOMMU && DEBUG_KERNEL
  17        bool "Enable IOMMU debugging"
  18        help
  19          Force the IOMMU to on even when you have less than 4GB of
  20          memory and add debugging code. On overflow always panic. And
  21          allow to enable IOMMU leak tracing. Can be disabled at boot
  22          time with iommu=noforce. This will also enable scatter gather
  23          list merging.  Currently not recommended for production
  24          code. When you use it make sure you have a big enough
  25          IOMMU/AGP aperture.  Most of the options enabled by this can
  26          be set more finegrained using the iommu= command line
  27          options. See Documentation/x86_64/boot-options.txt for more
  28          details.
  29
  30 config IOMMU_LEAK
  31        bool "IOMMU leak tracing"
  32        depends on DEBUG_KERNEL
  33        depends on IOMMU_DEBUG
  34        help
  35          Add a simple leak tracer to the IOMMU code. This is useful when you
  36          are debugging a buggy device driver that leaks IOMMU mappings.
  37
  38 config DEBUG_STACKOVERFLOW
  39         bool "Check for stack overflows"
  40         depends on DEBUG_KERNEL
  41         help
  42           This option will cause messages to be printed if free stack space
  43           drops below a certain limit.
  44
  45 #config X86_REMOTE_DEBUG
  46 #       bool "kgdb debugging stub"
  47
  48 endmenu