target/linux/ubicom32/files/arch/ubicom32/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 config TRACE_IRQFLAGS_SUPPORT
   4         def_bool y
   5
   6 config DEBUG_VERBOSE
   7         bool "Verbose fault messages"
   8         default y
   9         select PRINTK
  10         help
  11           When a program crashes due to an exception, or the kernel detects
  12           an internal error, the kernel can print a not so brief message
  13           explaining what the problem was. This debugging information is
  14           useful to developers and kernel hackers when tracking down problems,
  15           but mostly meaningless to other people. This is always helpful for
  16           debugging but serves no purpose on a production system.
  17           Most people should say N here.
  18
  19 config PROTECT_KERNEL
  20         default y
  21         bool 'Enable Kernel range register Protection'
  22         help
  23           Adds code to enable/disable range registers to protect static
  24           kernel code/data from userspace.  Currently the ranges covered
  25           do no protect kernel loadable modules or dynamically allocated
  26           kernel data.
  27
  28 config NO_KERNEL_MSG
  29         bool "Suppress Kernel BUG Messages"
  30         help
  31           Do not output any debug BUG messages within the kernel.
  32
  33 config EARLY_PRINTK
  34         bool "Use the driver that you selected as console also for early printk (to debug kernel bootup)."
  35         default n
  36         help
  37           If you want to use the serdes driver (console=ttyUS0) for
  38           early printk, you must also supply an additional kernel boot
  39           parameter like this:
  40
  41                 serdes=ioportaddr,irq,clockrate,baud
  42
  43           For an IP7160RGW eval board, you could use this:
  44
  45                 serdes=0x2004000,61,250000000,57600
  46
  47           which will let you see early printk output at 57600 baud.
  48
  49 config STOP_ON_TRAP
  50         bool "Enable stopping at the LDSR for all traps"
  51         default n
  52         help
  53         Cause the LDSR to stop all threads whenever a trap is about to be serviced
  54
  55 config STOP_ON_BUG
  56         bool "Enable stopping on failed BUG_ON()"
  57         default n
  58         help
  59         Cause all BUG_ON failures to stop all threads
  60
  61 config DEBUG_IRQMEASURE
  62         bool "Enable IRQ handler measurements"
  63         default n
  64         help
  65         When enabled each IRQ's min/avg/max times will be printed.  If the handler
  66         re-enables interrupt, the times will show the full time including to service
  67         nested interrupts.  See /proc/irq_measurements.
  68
  69 config DEBUG_PCIMEASURE
  70         bool "Enable PCI transaction measurements"
  71         default n
  72         help
  73         When enabled the system will measure the min/avg/max timer for each PCI transactions.
  74         See /proc/pci_measurements.
  75
  76 config ACCESS_OK_CHECKS_ENABLED
  77         bool "Enable user space access checks"
  78         default n
  79         help
  80         Enabling this check causes the kernel to verify that addresses passed
  81         to the kernel by the user space code are within the processes
  82         address space.  On a no-mmu system, this is done by examining the
  83         processes memory data structures (adversly affecting performance) but
  84         ensuring that a process does not ask the kernel to violate another
  85         processes address space.  Sadly, the kernel uses access_ok() for
  86         address that are in the kernel which results in a large volume of
  87         false positives.
  88
  89 choice
  90         prompt "Unaligned Access Support"
  91         default UNALIGNED_ACCESS_ENABLED
  92         help
  93                 Kernel / Userspace unaligned access handling.
  94
  95 config  UNALIGNED_ACCESS_ENABLED
  96         bool "Kernel and Userspace"
  97         help
  98
  99 config  UNALIGNED_ACCESS_USERSPACE_ONLY
 100         bool "Userspace Only"
 101         help
 102
 103 config  UNALIGNED_ACCESS_DISABLED
 104         bool "Disabled"
 105         help
 106
 107 endchoice
 108
 109 config DEBUG_STACKOVERFLOW
 110         bool "Check for stack overflows"
 111         default n
 112         depends on DEBUG_KERNEL
 113         help
 114           This option will cause messages to be printed if free kernel stack space
 115           drops below a certain limit (THREAD_SIZE /8).
 116
 117 config DEBUG_STACK_USAGE
 118         bool "Stack utilization instrumentation"
 119         default n
 120         depends on DEBUG_KERNEL
 121         help
 122           Enables the display of the minimum amount of free kernel stack which each
 123           task has ever had available in the sysrq-T and sysrq-P debug output.
 124
 125           This option will slow down process creation somewhat.
 126
 127 source "lib/Kconfig.debug"
 128
 129 endmenu