arch/powerpc/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config DEBUG_STACKOVERFLOW
   6         bool "Check for stack overflows"
   7         depends on DEBUG_KERNEL
   8         help
   9           This option will cause messages to be printed if free stack space
  10           drops below a certain limit.
  11
  12 config DEBUG_STACK_USAGE
  13         bool "Stack utilization instrumentation"
  14         depends on DEBUG_KERNEL
  15         help
  16           Enables the display of the minimum amount of free stack which each
  17           task has ever had available in the sysrq-T and sysrq-P debug output.
  18
  19           This option will slow down process creation somewhat.
  20
  21 config DEBUG_PAGEALLOC
  22         bool "Debug page memory allocations"
  23         depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND
  24         help
  25           Unmap pages from the kernel linear mapping after free_pages().
  26           This results in a large slowdown, but helps to find certain types
  27           of memory corruptions.
  28
  29
  30 config HCALL_STATS
  31         bool "Hypervisor call instrumentation"
  32         depends on PPC_PSERIES && DEBUG_FS
  33         help
  34           Adds code to keep track of the number of hypervisor calls made and
  35           the amount of time spent in hypervisor calls.  Wall time spent in
  36           each call is always calculated, and if available CPU cycles spent
  37           are also calculated.  A directory named hcall_inst is added at the
  38           root of the debugfs filesystem.  Within the hcall_inst directory
  39           are files that contain CPU specific call statistics.
  40
  41           This option will add a small amount of overhead to all hypervisor
  42           calls.
  43
  44 config DEBUGGER
  45         bool "Enable debugger hooks"
  46         depends on DEBUG_KERNEL
  47         help
  48           Include in-kernel hooks for kernel debuggers. Unless you are
  49           intending to debug the kernel, say N here.
  50
  51 config KGDB
  52         bool "Include kgdb kernel debugger"
  53         depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)
  54         select DEBUG_INFO
  55         help
  56           Include in-kernel hooks for kgdb, the Linux kernel source level
  57           debugger.  See <http://kgdb.sourceforge.net/> for more information.
  58           Unless you are intending to debug the kernel, say N here.
  59
  60 choice
  61         prompt "Serial Port"
  62         depends on KGDB
  63         default KGDB_TTYS1
  64
  65 config KGDB_TTYS0
  66         bool "ttyS0"
  67
  68 config KGDB_TTYS1
  69         bool "ttyS1"
  70
  71 config KGDB_TTYS2
  72         bool "ttyS2"
  73
  74 config KGDB_TTYS3
  75         bool "ttyS3"
  76
  77 endchoice
  78
  79 config KGDB_CONSOLE
  80         bool "Enable serial console thru kgdb port"
  81         depends on KGDB && 8xx || CPM2
  82         help
  83           If you enable this, all serial console messages will be sent
  84           over the gdb stub.
  85           If unsure, say N.
  86
  87 config XMON
  88         bool "Include xmon kernel debugger"
  89         depends on DEBUGGER
  90         help
  91           Include in-kernel hooks for the xmon kernel monitor/debugger.
  92           Unless you are intending to debug the kernel, say N here.
  93           Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
  94           nothing will appear on the screen (xmon writes directly to the
  95           framebuffer memory).
  96           The cmdline option 'xmon' or 'xmon=early' will drop into xmon
  97           very early during boot. 'xmon=on' will just enable the xmon
  98           debugger hooks.  'xmon=off' will disable the debugger hooks
  99           if CONFIG_XMON_DEFAULT is set.
 100           xmon will print a backtrace on the very first invocation.
 101           'xmon=nobt' will disable this autobacktrace.
 102
 103 config XMON_DEFAULT
 104         bool "Enable xmon by default"
 105         depends on XMON
 106         help
 107           xmon is normally disabled unless booted with 'xmon=on'.
 108           Use 'xmon=off' to disable xmon init during runtime.
 109
 110 config XMON_DISASSEMBLY
 111         bool "Include disassembly support in xmon"
 112         depends on XMON
 113         default y
 114         help
 115           Include support for disassembling in xmon. You probably want
 116           to say Y here, unless you're building for a memory-constrained
 117           system.
 118
 119 config IRQSTACKS
 120         bool "Use separate kernel stacks when processing interrupts"
 121         depends on PPC64
 122         help
 123           If you say Y here the kernel will use separate kernel stacks
 124           for handling hard and soft interrupts.  This can help avoid
 125           overflowing the process kernel stacks.
 126
 127 config BDI_SWITCH
 128         bool "Include BDI-2000 user context switcher"
 129         depends on DEBUG_KERNEL && PPC32
 130         help
 131           Include in-kernel support for the Abatron BDI2000 debugger.
 132           Unless you are intending to debug the kernel with one of these
 133           machines, say N here.
 134
 135 config BOOTX_TEXT
 136         bool "Support for early boot text console (BootX or OpenFirmware only)"
 137         depends PPC_OF
 138         help
 139           Say Y here to see progress messages from the boot firmware in text
 140           mode. Requires either BootX or Open Firmware.
 141
 142 config PPC_EARLY_DEBUG
 143         bool "Early debugging (dangerous)"
 144
 145 choice
 146         prompt "Early debugging console"
 147         depends on PPC_EARLY_DEBUG
 148         help
 149           Use the selected console for early debugging. Careful, if you
 150           enable debugging for the wrong type of machine your kernel
 151           _will not boot_.
 152
 153 config PPC_EARLY_DEBUG_LPAR
 154         bool "LPAR HV Console"
 155         depends on PPC_PSERIES
 156         help
 157           Select this to enable early debugging for a machine with a HVC
 158           console on vterm 0.
 159
 160 config PPC_EARLY_DEBUG_G5
 161         bool "Apple G5"
 162         depends on PPC_PMAC64
 163         help
 164           Select this to enable early debugging for Apple G5 machines.
 165
 166 config PPC_EARLY_DEBUG_RTAS_PANEL
 167         bool "RTAS Panel"
 168         depends on PPC_RTAS
 169         help
 170           Select this to enable early debugging via the RTAS panel.
 171
 172 config PPC_EARLY_DEBUG_RTAS_CONSOLE
 173         bool "RTAS Console"
 174         depends on PPC_RTAS
 175         select UDBG_RTAS_CONSOLE
 176         help
 177           Select this to enable early debugging via the RTAS console.
 178
 179 config PPC_EARLY_DEBUG_MAPLE
 180         bool "Maple real mode"
 181         depends on PPC_MAPLE
 182         help
 183           Select this to enable early debugging for Maple.
 184
 185 config PPC_EARLY_DEBUG_ISERIES
 186         bool "iSeries HV Console"
 187         depends on PPC_ISERIES
 188         help
 189           Select this to enable early debugging for legacy iSeries. You need
 190           to hit "Ctrl-x Ctrl-x" to see the messages on the console.
 191
 192 config PPC_EARLY_DEBUG_PAS_REALMODE
 193         bool "PA Semi real mode"
 194         depends on PPC_PASEMI
 195         help
 196           Select this to enable early debugging for PA Semi.
 197           Output will be on UART0.
 198
 199 config PPC_EARLY_DEBUG_BEAT
 200         bool "Beat HV Console"
 201         depends on PPC_CELLEB
 202         select PPC_UDBG_BEAT
 203         help
 204           Select this to enable early debugging for Celleb with Beat.
 205
 206 config PPC_EARLY_DEBUG_44x
 207         bool "Early serial debugging for IBM/AMCC 44x CPUs"
 208         depends on 44x
 209         select PPC_UDBG_16550
 210         help
 211           Select this to enable early debugging for IBM 44x chips via the
 212           inbuilt serial port.
 213
 214 endchoice
 215
 216 config PPC_EARLY_DEBUG_44x_PHYSLOW
 217         hex "Low 32 bits of early debug UART physical address"
 218         depends PPC_EARLY_DEBUG_44x
 219         default "0x40000200"
 220
 221 config PPC_EARLY_DEBUG_44x_PHYSHIGH
 222         hex "EPRN of early debug UART physical address"
 223         depends PPC_EARLY_DEBUG_44x
 224         default "0x1"
 225
 226 endmenu