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 HCALL_STATS
  39         bool "Hypervisor call instrumentation"
  40         depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
  41         help
  42           Adds code to keep track of the number of hypervisor calls made and
  43           the amount of time spent in hypervisor calls.  Wall time spent in
  44           each call is always calculated, and if available CPU cycles spent
  45           are also calculated.  A directory named hcall_inst is added at the
  46           root of the debugfs filesystem.  Within the hcall_inst directory
  47           are files that contain CPU specific call statistics.
  48
  49           This option will add a small amount of overhead to all hypervisor
  50           calls.
  51
  52 config PPC_EMULATED_STATS
  53         bool "Emulated instructions tracking"
  54         depends on DEBUG_FS
  55         help
  56           Adds code to keep track of the number of instructions that are
  57           emulated by the in-kernel emulator. Counters for the various classes
  58           of emulated instructions are available under
  59           powerpc/emulated_instructions/ in the root of the debugfs file
  60           system. Optionally (controlled by
  61           powerpc/emulated_instructions/do_warn in debugfs), rate-limited
  62           warnings can be printed to the console when instructions are
  63           emulated.
  64
  65 config CODE_PATCHING_SELFTEST
  66         bool "Run self-tests of the code-patching code."
  67         depends on DEBUG_KERNEL
  68         default n
  69
  70 config FTR_FIXUP_SELFTEST
  71         bool "Run self-tests of the feature-fixup code."
  72         depends on DEBUG_KERNEL
  73         default n
  74
  75 config MSI_BITMAP_SELFTEST
  76         bool "Run self-tests of the MSI bitmap code."
  77         depends on DEBUG_KERNEL
  78         default n
  79
  80 config XMON
  81         bool "Include xmon kernel debugger"
  82         depends on DEBUG_KERNEL
  83         help
  84           Include in-kernel hooks for the xmon kernel monitor/debugger.
  85           Unless you are intending to debug the kernel, say N here.
  86           Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
  87           nothing will appear on the screen (xmon writes directly to the
  88           framebuffer memory).
  89           The cmdline option 'xmon' or 'xmon=early' will drop into xmon
  90           very early during boot. 'xmon=on' will just enable the xmon
  91           debugger hooks.  'xmon=off' will disable the debugger hooks
  92           if CONFIG_XMON_DEFAULT is set.
  93           xmon will print a backtrace on the very first invocation.
  94           'xmon=nobt' will disable this autobacktrace.
  95
  96 config XMON_DEFAULT
  97         bool "Enable xmon by default"
  98         depends on XMON
  99         help
 100           xmon is normally disabled unless booted with 'xmon=on'.
 101           Use 'xmon=off' to disable xmon init during runtime.
 102
 103 config XMON_DISASSEMBLY
 104         bool "Include disassembly support in xmon"
 105         depends on XMON
 106         default y
 107         help
 108           Include support for disassembling in xmon. You probably want
 109           to say Y here, unless you're building for a memory-constrained
 110           system.
 111
 112 config DEBUGGER
 113         bool
 114         depends on KGDB || XMON
 115         default y
 116
 117 config VIRQ_DEBUG
 118         bool "Expose hardware/virtual IRQ mapping via debugfs"
 119         depends on DEBUG_FS
 120         help
 121           This option will show the mapping relationship between hardware irq
 122           numbers and virtual irq numbers. The mapping is exposed via debugfs
 123           in the file powerpc/virq_mapping.
 124
 125           If you don't know what this means you don't need it.
 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 on PPC_OF && PPC_BOOK3S
 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         help
 145           Say Y to enable some early debugging facilities that may be available
 146           for your processor/board combination. Those facilities are hacks
 147           intended to debug problems early during boot, this should not be
 148           enabled in a production kernel.
 149           Note that enabling this will also cause the kernel default log level
 150           to be pushed to max automatically very early during boot
 151
 152 choice
 153         prompt "Early debugging console"
 154         depends on PPC_EARLY_DEBUG
 155         help
 156           Use the selected console for early debugging. Careful, if you
 157           enable debugging for the wrong type of machine your kernel
 158           _will not boot_.
 159
 160 config PPC_EARLY_DEBUG_LPAR
 161         bool "LPAR HV Console"
 162         depends on PPC_PSERIES
 163         help
 164           Select this to enable early debugging for a machine with a HVC
 165           console on vterm 0.
 166
 167 config PPC_EARLY_DEBUG_LPAR_HVSI
 168         bool "LPAR HVSI Console"
 169         depends on PPC_PSERIES
 170         help
 171           Select this to enable early debugging for a machine with a HVSI
 172           console on a specified vterm.
 173
 174 config PPC_EARLY_DEBUG_G5
 175         bool "Apple G5"
 176         depends on PPC_PMAC64
 177         help
 178           Select this to enable early debugging for Apple G5 machines.
 179
 180 config PPC_EARLY_DEBUG_RTAS_PANEL
 181         bool "RTAS Panel"
 182         depends on PPC_RTAS
 183         help
 184           Select this to enable early debugging via the RTAS panel.
 185
 186 config PPC_EARLY_DEBUG_RTAS_CONSOLE
 187         bool "RTAS Console"
 188         depends on PPC_RTAS
 189         select UDBG_RTAS_CONSOLE
 190         help
 191           Select this to enable early debugging via the RTAS console.
 192
 193 config PPC_EARLY_DEBUG_MAPLE
 194         bool "Maple real mode"
 195         depends on PPC_MAPLE
 196         help
 197           Select this to enable early debugging for Maple.
 198
 199 config PPC_EARLY_DEBUG_PAS_REALMODE
 200         bool "PA Semi real mode"
 201         depends on PPC_PASEMI
 202         help
 203           Select this to enable early debugging for PA Semi.
 204           Output will be on UART0.
 205
 206 config PPC_EARLY_DEBUG_BEAT
 207         bool "Beat HV Console"
 208         depends on PPC_CELLEB
 209         select PPC_UDBG_BEAT
 210         help
 211           Select this to enable early debugging for Celleb with Beat.
 212
 213 config PPC_EARLY_DEBUG_44x
 214         bool "Early serial debugging for IBM/AMCC 44x CPUs"
 215         # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
 216         # mark, which doesn't work with current 440 KVM.
 217         depends on 44x && !KVM
 218         help
 219           Select this to enable early debugging for IBM 44x chips via the
 220           inbuilt serial port.  If you enable this, ensure you set
 221           PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
 222
 223 config PPC_EARLY_DEBUG_40x
 224         bool "Early serial debugging for IBM/AMCC 40x CPUs"
 225         depends on 40x
 226         help
 227           Select this to enable early debugging for IBM 40x chips via the
 228           inbuilt serial port. This works on chips with a 16550 compatible
 229           UART. Xilinx chips with uartlite cannot use this option.
 230
 231 config PPC_EARLY_DEBUG_CPM
 232         bool "Early serial debugging for Freescale CPM-based serial ports"
 233         depends on SERIAL_CPM
 234         select PIN_TLB if PPC_8xx
 235         help
 236           Select this to enable early debugging for Freescale chips
 237           using a CPM-based serial port.  This assumes that the bootwrapper
 238           has run, and set up the CPM in a particular way.
 239
 240 config PPC_EARLY_DEBUG_USBGECKO
 241         bool "Early debugging through the USB Gecko adapter"
 242         depends on GAMECUBE_COMMON
 243         select USBGECKO_UDBG
 244         help
 245           Select this to enable early debugging for Nintendo GameCube/Wii
 246           consoles via an external USB Gecko adapter.
 247
 248 config PPC_EARLY_DEBUG_WSP
 249         bool "Early debugging via WSP's internal UART"
 250         depends on PPC_WSP
 251         select PPC_UDBG_16550
 252
 253 config PPC_EARLY_DEBUG_PS3GELIC
 254         bool "Early debugging through the PS3 Ethernet port"
 255         depends on PPC_PS3
 256         select PS3GELIC_UDBG
 257         help
 258           Select this to enable early debugging for the PlayStation3 via
 259           UDP broadcasts sent out through the Ethernet port.
 260
 261 config PPC_EARLY_DEBUG_OPAL_RAW
 262         bool "OPAL raw console"
 263         depends on HVC_OPAL
 264         help
 265           Select this to enable early debugging for the PowerNV platform
 266           using a "raw" console
 267
 268 config PPC_EARLY_DEBUG_OPAL_HVSI
 269         bool "OPAL hvsi console"
 270         depends on HVC_OPAL
 271         help
 272           Select this to enable early debugging for the PowerNV platform
 273           using an "hvsi" console
 274
 275 endchoice
 276
 277 config PPC_EARLY_DEBUG_OPAL
 278         def_bool y
 279         depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
 280
 281
 282 config PPC_EARLY_DEBUG_HVSI_VTERMNO
 283         hex "vterm number to use with early debug HVSI"
 284         depends on PPC_EARLY_DEBUG_LPAR_HVSI
 285         default "0x30000000"
 286         help
 287           You probably want 0x30000000 for your first serial port and
 288           0x30000001 for your second one
 289
 290 config PPC_EARLY_DEBUG_OPAL_VTERMNO
 291         hex "vterm number to use with OPAL early debug"
 292         depends on PPC_EARLY_DEBUG_OPAL
 293         default "0"
 294         help
 295           This correspond to which /dev/hvcN you want to use for early
 296           debug.
 297
 298           On OPAL v1 (takeover) this should always be 0
 299           On OPAL v2, this will be 0 for network console and 1 or 2 for
 300           the machine built-in serial ports.
 301
 302 config PPC_EARLY_DEBUG_44x_PHYSLOW
 303         hex "Low 32 bits of early debug UART physical address"
 304         depends on PPC_EARLY_DEBUG_44x
 305         default "0x40000200"
 306         help
 307           You probably want 0x40000200 for ebony boards and
 308           0x40000300 for taishan
 309
 310 config PPC_EARLY_DEBUG_44x_PHYSHIGH
 311         hex "EPRN of early debug UART physical address"
 312         depends on PPC_EARLY_DEBUG_44x
 313         default "0x1"
 314
 315 config PPC_EARLY_DEBUG_40x_PHYSADDR
 316         hex "Early debug UART physical address"
 317         depends on PPC_EARLY_DEBUG_40x
 318         default "0xef600300"
 319
 320 config PPC_EARLY_DEBUG_CPM_ADDR
 321         hex "CPM UART early debug transmit descriptor address"
 322         depends on PPC_EARLY_DEBUG_CPM
 323         default "0xfa202008" if PPC_EP88XC
 324         default "0xf0001ff8" if CPM2
 325         default "0xff002008" if CPM1
 326         help
 327           This specifies the address of the transmit descriptor
 328           used for early debug output.  Because it is needed before
 329           platform probing is done, all platforms selected must
 330           share the same address.
 331
 332 config STRICT_DEVMEM
 333         def_bool y
 334         prompt "Filter access to /dev/mem"
 335         help
 336           This option restricts access to /dev/mem.  If this option is
 337           disabled, you allow userspace access to all memory, including
 338           kernel and userspace memory. Accidental memory access is likely
 339           to be disastrous.
 340           Memory access is required for experts who want to debug the kernel.
 341
 342           If you are unsure, say Y.
 343
 344 endmenu