arch/powerpc/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config PPC_DISABLE_WERROR
   6         bool "Don't build arch/powerpc code with -Werror"
   7         default n
   8         help
   9           This option tells the compiler NOT to build the code under
  10           arch/powerpc with the -Werror flag (which means warnings
  11           are treated as errors).
  12
  13           Only enable this if you are hitting a build failure in the
  14           arch/powerpc code caused by a warning, and you don't feel
  15           inclined to fix it.
  16
  17 config PPC_WERROR
  18         bool
  19         depends on !PPC_DISABLE_WERROR
  20         default y
  21
  22 config PRINT_STACK_DEPTH
  23         int "Stack depth to print" if DEBUG_KERNEL
  24         default 64
  25         help
  26           This option allows you to set the stack depth that the kernel
  27           prints in stack traces. This can be useful if your display is
  28           too small and stack traces cause important information to
  29           scroll off the screen.
  30
  31 config DEBUG_STACKOVERFLOW
  32         bool "Check for stack overflows"
  33         depends on DEBUG_KERNEL
  34         help
  35           This option will cause messages to be printed if free stack space
  36           drops below a certain limit.
  37
  38 config DEBUG_STACK_USAGE
  39         bool "Stack utilization instrumentation"
  40         depends on DEBUG_KERNEL
  41         help
  42           Enables the display of the minimum amount of free stack which each
  43           task has ever had available in the sysrq-T and sysrq-P debug output.
  44
  45           This option will slow down process creation somewhat.
  46
  47 config HCALL_STATS
  48         bool "Hypervisor call instrumentation"
  49         depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
  50         help
  51           Adds code to keep track of the number of hypervisor calls made and
  52           the amount of time spent in hypervisor calls.  Wall time spent in
  53           each call is always calculated, and if available CPU cycles spent
  54           are also calculated.  A directory named hcall_inst is added at the
  55           root of the debugfs filesystem.  Within the hcall_inst directory
  56           are files that contain CPU specific call statistics.
  57
  58           This option will add a small amount of overhead to all hypervisor
  59           calls.
  60
  61 config PPC_EMULATED_STATS
  62         bool "Emulated instructions tracking"
  63         depends on DEBUG_FS
  64         help
  65           Adds code to keep track of the number of instructions that are
  66           emulated by the in-kernel emulator. Counters for the various classes
  67           of emulated instructions are available under
  68           powerpc/emulated_instructions/ in the root of the debugfs file
  69           system. Optionally (controlled by
  70           powerpc/emulated_instructions/do_warn in debugfs), rate-limited
  71           warnings can be printed to the console when instructions are
  72           emulated.
  73
  74 config CODE_PATCHING_SELFTEST
  75         bool "Run self-tests of the code-patching code."
  76         depends on DEBUG_KERNEL
  77         default n
  78
  79 config FTR_FIXUP_SELFTEST
  80         bool "Run self-tests of the feature-fixup code."
  81         depends on DEBUG_KERNEL
  82         default n
  83
  84 config MSI_BITMAP_SELFTEST
  85         bool "Run self-tests of the MSI bitmap code."
  86         depends on DEBUG_KERNEL
  87         default n
  88
  89 config XMON
  90         bool "Include xmon kernel debugger"
  91         depends on DEBUG_KERNEL
  92         help
  93           Include in-kernel hooks for the xmon kernel monitor/debugger.
  94           Unless you are intending to debug the kernel, say N here.
  95           Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
  96           nothing will appear on the screen (xmon writes directly to the
  97           framebuffer memory).
  98           The cmdline option 'xmon' or 'xmon=early' will drop into xmon
  99           very early during boot. 'xmon=on' will just enable the xmon
 100           debugger hooks.  'xmon=off' will disable the debugger hooks
 101           if CONFIG_XMON_DEFAULT is set.
 102           xmon will print a backtrace on the very first invocation.
 103           'xmon=nobt' will disable this autobacktrace.
 104
 105 config XMON_DEFAULT
 106         bool "Enable xmon by default"
 107         depends on XMON
 108         help
 109           xmon is normally disabled unless booted with 'xmon=on'.
 110           Use 'xmon=off' to disable xmon init during runtime.
 111
 112 config XMON_DISASSEMBLY
 113         bool "Include disassembly support in xmon"
 114         depends on XMON
 115         default y
 116         help
 117           Include support for disassembling in xmon. You probably want
 118           to say Y here, unless you're building for a memory-constrained
 119           system.
 120
 121 config DEBUGGER
 122         bool
 123         depends on KGDB || XMON
 124         default y
 125
 126 config IRQSTACKS
 127         bool "Use separate kernel stacks when processing interrupts"
 128         help
 129           If you say Y here the kernel will use separate kernel stacks
 130           for handling hard and soft interrupts.  This can help avoid
 131           overflowing the process kernel stacks.
 132
 133 config VIRQ_DEBUG
 134         bool "Expose hardware/virtual IRQ mapping via debugfs"
 135         depends on DEBUG_FS
 136         help
 137           This option will show the mapping relationship between hardware irq
 138           numbers and virtual irq numbers. The mapping is exposed via debugfs
 139           in the file powerpc/virq_mapping.
 140
 141           If you don't know what this means you don't need it.
 142
 143 config BDI_SWITCH
 144         bool "Include BDI-2000 user context switcher"
 145         depends on DEBUG_KERNEL && PPC32
 146         help
 147           Include in-kernel support for the Abatron BDI2000 debugger.
 148           Unless you are intending to debug the kernel with one of these
 149           machines, say N here.
 150
 151 config BOOTX_TEXT
 152         bool "Support for early boot text console (BootX or OpenFirmware only)"
 153         depends on PPC_OF && PPC_BOOK3S
 154         help
 155           Say Y here to see progress messages from the boot firmware in text
 156           mode. Requires either BootX or Open Firmware.
 157
 158 config PPC_EARLY_DEBUG
 159         bool "Early debugging (dangerous)"
 160         # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
 161         # mark, which doesn't work with current 440 KVM.
 162         depends on !KVM
 163         help
 164           Say Y to enable some early debugging facilities that may be available
 165           for your processor/board combination. Those facilities are hacks
 166           intended to debug problems early during boot, this should not be
 167           enabled in a production kernel.
 168           Note that enabling this will also cause the kernel default log level
 169           to be pushed to max automatically very early during boot
 170
 171 choice
 172         prompt "Early debugging console"
 173         depends on PPC_EARLY_DEBUG
 174         help
 175           Use the selected console for early debugging. Careful, if you
 176           enable debugging for the wrong type of machine your kernel
 177           _will not boot_.
 178
 179 config PPC_EARLY_DEBUG_LPAR
 180         bool "LPAR HV Console"
 181         depends on PPC_PSERIES
 182         help
 183           Select this to enable early debugging for a machine with a HVC
 184           console on vterm 0.
 185
 186 config PPC_EARLY_DEBUG_G5
 187         bool "Apple G5"
 188         depends on PPC_PMAC64
 189         help
 190           Select this to enable early debugging for Apple G5 machines.
 191
 192 config PPC_EARLY_DEBUG_RTAS_PANEL
 193         bool "RTAS Panel"
 194         depends on PPC_RTAS
 195         help
 196           Select this to enable early debugging via the RTAS panel.
 197
 198 config PPC_EARLY_DEBUG_RTAS_CONSOLE
 199         bool "RTAS Console"
 200         depends on PPC_RTAS
 201         select UDBG_RTAS_CONSOLE
 202         help
 203           Select this to enable early debugging via the RTAS console.
 204
 205 config PPC_EARLY_DEBUG_MAPLE
 206         bool "Maple real mode"
 207         depends on PPC_MAPLE
 208         help
 209           Select this to enable early debugging for Maple.
 210
 211 config PPC_EARLY_DEBUG_ISERIES
 212         bool "iSeries HV Console"
 213         depends on PPC_ISERIES
 214         help
 215           Select this to enable early debugging for legacy iSeries. You need
 216           to hit "Ctrl-x Ctrl-x" to see the messages on the console.
 217
 218 config PPC_EARLY_DEBUG_PAS_REALMODE
 219         bool "PA Semi real mode"
 220         depends on PPC_PASEMI
 221         help
 222           Select this to enable early debugging for PA Semi.
 223           Output will be on UART0.
 224
 225 config PPC_EARLY_DEBUG_BEAT
 226         bool "Beat HV Console"
 227         depends on PPC_CELLEB
 228         select PPC_UDBG_BEAT
 229         help
 230           Select this to enable early debugging for Celleb with Beat.
 231
 232 config PPC_EARLY_DEBUG_44x
 233         bool "Early serial debugging for IBM/AMCC 44x CPUs"
 234         depends on 44x
 235         help
 236           Select this to enable early debugging for IBM 44x chips via the
 237           inbuilt serial port.  If you enable this, ensure you set
 238           PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
 239
 240 config PPC_EARLY_DEBUG_40x
 241         bool "Early serial debugging for IBM/AMCC 40x CPUs"
 242         depends on 40x
 243         help
 244           Select this to enable early debugging for IBM 40x chips via the
 245           inbuilt serial port. This works on chips with a 16550 compatible
 246           UART. Xilinx chips with uartlite cannot use this option.
 247
 248 config PPC_EARLY_DEBUG_CPM
 249         bool "Early serial debugging for Freescale CPM-based serial ports"
 250         depends on SERIAL_CPM
 251         select PIN_TLB if PPC_8xx
 252         help
 253           Select this to enable early debugging for Freescale chips
 254           using a CPM-based serial port.  This assumes that the bootwrapper
 255           has run, and set up the CPM in a particular way.
 256
 257 config PPC_EARLY_DEBUG_USBGECKO
 258         bool "Early debugging through the USB Gecko adapter"
 259         depends on GAMECUBE_COMMON
 260         select USBGECKO_UDBG
 261         help
 262           Select this to enable early debugging for Nintendo GameCube/Wii
 263           consoles via an external USB Gecko adapter.
 264
 265 endchoice
 266
 267 config PPC_EARLY_DEBUG_44x_PHYSLOW
 268         hex "Low 32 bits of early debug UART physical address"
 269         depends on PPC_EARLY_DEBUG_44x
 270         default "0x40000200"
 271         help
 272           You probably want 0x40000200 for ebony boards and
 273           0x40000300 for taishan
 274
 275 config PPC_EARLY_DEBUG_44x_PHYSHIGH
 276         hex "EPRN of early debug UART physical address"
 277         depends on PPC_EARLY_DEBUG_44x
 278         default "0x1"
 279
 280 config PPC_EARLY_DEBUG_40x_PHYSADDR
 281         hex "Early debug UART physical address"
 282         depends on PPC_EARLY_DEBUG_40x
 283         default "0xef600300"
 284
 285 config PPC_EARLY_DEBUG_CPM_ADDR
 286         hex "CPM UART early debug transmit descriptor address"
 287         depends on PPC_EARLY_DEBUG_CPM
 288         default "0xfa202008" if PPC_EP88XC
 289         default "0xf0001ff8" if CPM2
 290         default "0xff002008" if CPM1
 291         help
 292           This specifies the address of the transmit descriptor
 293           used for early debug output.  Because it is needed before
 294           platform probing is done, all platforms selected must
 295           share the same address.
 296
 297 endmenu