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 HCALL_STATS
  32         bool "Hypervisor call instrumentation"
  33         depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
  34         help
  35           Adds code to keep track of the number of hypervisor calls made and
  36           the amount of time spent in hypervisor calls.  Wall time spent in
  37           each call is always calculated, and if available CPU cycles spent
  38           are also calculated.  A directory named hcall_inst is added at the
  39           root of the debugfs filesystem.  Within the hcall_inst directory
  40           are files that contain CPU specific call statistics.
  41
  42           This option will add a small amount of overhead to all hypervisor
  43           calls.
  44
  45 config PPC_EMULATED_STATS
  46         bool "Emulated instructions tracking"
  47         depends on DEBUG_FS
  48         help
  49           Adds code to keep track of the number of instructions that are
  50           emulated by the in-kernel emulator. Counters for the various classes
  51           of emulated instructions are available under
  52           powerpc/emulated_instructions/ in the root of the debugfs file
  53           system. Optionally (controlled by
  54           powerpc/emulated_instructions/do_warn in debugfs), rate-limited
  55           warnings can be printed to the console when instructions are
  56           emulated.
  57
  58 config CODE_PATCHING_SELFTEST
  59         bool "Run self-tests of the code-patching code"
  60         depends on DEBUG_KERNEL
  61         default n
  62
  63 config JUMP_LABEL_FEATURE_CHECKS
  64         bool "Enable use of jump label for cpu/mmu_has_feature()"
  65         depends on JUMP_LABEL
  66         default y
  67         help
  68           Selecting this options enables use of jump labels for some internal
  69           feature checks. This should generate more optimal code for those
  70           checks.
  71
  72 config JUMP_LABEL_FEATURE_CHECK_DEBUG
  73         bool "Do extra check on feature fixup calls"
  74         depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
  75         default n
  76         help
  77           This tries to catch incorrect usage of cpu_has_feature() and
  78           mmu_has_feature() in the code.
  79
  80           If you don't know what this means, say N.
  81
  82 config FTR_FIXUP_SELFTEST
  83         bool "Run self-tests of the feature-fixup code"
  84         depends on DEBUG_KERNEL
  85         default n
  86
  87 config MSI_BITMAP_SELFTEST
  88         bool "Run self-tests of the MSI bitmap code"
  89         depends on DEBUG_KERNEL
  90         default n
  91
  92 config XMON
  93         bool "Include xmon kernel debugger"
  94         depends on DEBUG_KERNEL
  95         help
  96           Include in-kernel hooks for the xmon kernel monitor/debugger.
  97           Unless you are intending to debug the kernel, say N here.
  98           Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
  99           nothing will appear on the screen (xmon writes directly to the
 100           framebuffer memory).
 101           The cmdline option 'xmon' or 'xmon=early' will drop into xmon
 102           very early during boot. 'xmon=on' will just enable the xmon
 103           debugger hooks.  'xmon=off' will disable the debugger hooks
 104           if CONFIG_XMON_DEFAULT is set.
 105           xmon will print a backtrace on the very first invocation.
 106           'xmon=nobt' will disable this autobacktrace.
 107
 108 config XMON_DEFAULT
 109         bool "Enable xmon by default"
 110         depends on XMON
 111         help
 112           xmon is normally disabled unless booted with 'xmon=on'.
 113           Use 'xmon=off' to disable xmon init during runtime.
 114
 115 config XMON_DISASSEMBLY
 116         bool "Include disassembly support in xmon"
 117         depends on XMON
 118         default y
 119         help
 120           Include support for disassembling in xmon. You probably want
 121           to say Y here, unless you're building for a memory-constrained
 122           system.
 123
 124 config DEBUGGER
 125         bool
 126         depends on KGDB || XMON
 127         default y
 128
 129 config BDI_SWITCH
 130         bool "Include BDI-2000 user context switcher"
 131         depends on DEBUG_KERNEL && PPC32
 132         help
 133           Include in-kernel support for the Abatron BDI2000 debugger.
 134           Unless you are intending to debug the kernel with one of these
 135           machines, say N here.
 136
 137 config BOOTX_TEXT
 138         bool "Support for early boot text console (BootX or OpenFirmware only)"
 139         depends on PPC_BOOK3S
 140         help
 141           Say Y here to see progress messages from the boot firmware in text
 142           mode. Requires either BootX or Open Firmware.
 143
 144 config PPC_EARLY_DEBUG
 145         bool "Early debugging (dangerous)"
 146         help
 147           Say Y to enable some early debugging facilities that may be available
 148           for your processor/board combination. Those facilities are hacks
 149           intended to debug problems early during boot, this should not be
 150           enabled in a production kernel.
 151           Note that enabling this will also cause the kernel default log level
 152           to be pushed to max automatically very early during boot
 153
 154 choice
 155         prompt "Early debugging console"
 156         depends on PPC_EARLY_DEBUG
 157         help
 158           Use the selected console for early debugging. Careful, if you
 159           enable debugging for the wrong type of machine your kernel
 160           _will not boot_.
 161
 162 config PPC_EARLY_DEBUG_BOOTX
 163         bool "BootX or OpenFirmware"
 164         depends on BOOTX_TEXT
 165         help
 166           Select this to enable early debugging for a machine using BootX
 167           or OpenFirmware.
 168
 169 config PPC_EARLY_DEBUG_LPAR
 170         bool "LPAR HV Console"
 171         depends on PPC_PSERIES && HVC_CONSOLE
 172         help
 173           Select this to enable early debugging for a machine with a HVC
 174           console on vterm 0.
 175
 176 config PPC_EARLY_DEBUG_LPAR_HVSI
 177         bool "LPAR HVSI Console"
 178         depends on PPC_PSERIES && HVC_CONSOLE
 179         help
 180           Select this to enable early debugging for a machine with a HVSI
 181           console on a specified vterm.
 182
 183 config PPC_EARLY_DEBUG_G5
 184         bool "Apple G5"
 185         depends on PPC_PMAC64
 186         help
 187           Select this to enable early debugging for Apple G5 machines.
 188
 189 config PPC_EARLY_DEBUG_RTAS_PANEL
 190         bool "RTAS Panel"
 191         depends on PPC_RTAS
 192         help
 193           Select this to enable early debugging via the RTAS panel.
 194
 195 config PPC_EARLY_DEBUG_RTAS_CONSOLE
 196         bool "RTAS Console"
 197         depends on PPC_RTAS
 198         select UDBG_RTAS_CONSOLE
 199         help
 200           Select this to enable early debugging via the RTAS console.
 201
 202 config PPC_EARLY_DEBUG_MAPLE
 203         bool "Maple real mode"
 204         depends on PPC_MAPLE
 205         help
 206           Select this to enable early debugging for Maple.
 207
 208 config PPC_EARLY_DEBUG_PAS_REALMODE
 209         bool "PA Semi real mode"
 210         depends on PPC_PASEMI
 211         help
 212           Select this to enable early debugging for PA Semi.
 213           Output will be on UART0.
 214
 215 config PPC_EARLY_DEBUG_44x
 216         bool "Early serial debugging for IBM/AMCC 44x CPUs"
 217         depends on 44x
 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         help
 235           Select this to enable early debugging for Freescale chips
 236           using a CPM-based serial port.  This assumes that the bootwrapper
 237           has run, and set up the CPM in a particular way.
 238
 239 config PPC_EARLY_DEBUG_USBGECKO
 240         bool "Early debugging through the USB Gecko adapter"
 241         depends on GAMECUBE_COMMON
 242         select USBGECKO_UDBG
 243         help
 244           Select this to enable early debugging for Nintendo GameCube/Wii
 245           consoles via an external USB Gecko adapter.
 246
 247 config PPC_EARLY_DEBUG_PS3GELIC
 248         bool "Early debugging through the PS3 Ethernet port"
 249         depends on PPC_PS3
 250         select PS3GELIC_UDBG
 251         help
 252           Select this to enable early debugging for the PlayStation3 via
 253           UDP broadcasts sent out through the Ethernet port.
 254
 255 config PPC_EARLY_DEBUG_OPAL_RAW
 256         bool "OPAL raw console"
 257         depends on HVC_OPAL
 258         help
 259           Select this to enable early debugging for the PowerNV platform
 260           using a "raw" console
 261
 262 config PPC_EARLY_DEBUG_OPAL_HVSI
 263         bool "OPAL hvsi console"
 264         depends on HVC_OPAL
 265         help
 266           Select this to enable early debugging for the PowerNV platform
 267           using an "hvsi" console
 268
 269 config PPC_EARLY_DEBUG_MEMCONS
 270         bool "In memory console"
 271         help
 272           Select this to enable early debugging using an in memory console.
 273           This console provides input and output buffers stored within the
 274           kernel BSS and should be safe to select on any system. A debugger
 275           can then be used to read kernel output or send input to the console.
 276 endchoice
 277
 278 config PPC_MEMCONS_OUTPUT_SIZE
 279         int "In memory console output buffer size"
 280         depends on PPC_EARLY_DEBUG_MEMCONS
 281         default 4096
 282         help
 283           Selects the size of the output buffer (in bytes) of the in memory
 284           console.
 285
 286 config PPC_MEMCONS_INPUT_SIZE
 287         int "In memory console input buffer size"
 288         depends on PPC_EARLY_DEBUG_MEMCONS
 289         default 128
 290         help
 291           Selects the size of the input buffer (in bytes) of the in memory
 292           console.
 293
 294 config PPC_EARLY_DEBUG_OPAL
 295         def_bool y
 296         depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
 297
 298
 299 config PPC_EARLY_DEBUG_HVSI_VTERMNO
 300         hex "vterm number to use with early debug HVSI"
 301         depends on PPC_EARLY_DEBUG_LPAR_HVSI
 302         default "0x30000000"
 303         help
 304           You probably want 0x30000000 for your first serial port and
 305           0x30000001 for your second one
 306
 307 config PPC_EARLY_DEBUG_OPAL_VTERMNO
 308         hex "vterm number to use with OPAL early debug"
 309         depends on PPC_EARLY_DEBUG_OPAL
 310         default "0"
 311         help
 312           This correspond to which /dev/hvcN you want to use for early
 313           debug.
 314
 315           On OPAL v2, this will be 0 for network console and 1 or 2 for
 316           the machine built-in serial ports.
 317
 318 config PPC_EARLY_DEBUG_44x_PHYSLOW
 319         hex "Low 32 bits of early debug UART physical address"
 320         depends on PPC_EARLY_DEBUG_44x
 321         default "0x40000200"
 322         help
 323           You probably want 0x40000200 for ebony boards and
 324           0x40000300 for taishan
 325
 326 config PPC_EARLY_DEBUG_44x_PHYSHIGH
 327         hex "EPRN of early debug UART physical address"
 328         depends on PPC_EARLY_DEBUG_44x
 329         default "0x1"
 330
 331 config PPC_EARLY_DEBUG_40x_PHYSADDR
 332         hex "Early debug UART physical address"
 333         depends on PPC_EARLY_DEBUG_40x
 334         default "0xef600300"
 335
 336 config PPC_EARLY_DEBUG_CPM_ADDR
 337         hex "CPM UART early debug transmit descriptor address"
 338         depends on PPC_EARLY_DEBUG_CPM
 339         default "0xfa202008" if PPC_EP88XC
 340         default "0xf0001ff8" if CPM2
 341         default "0xff002008" if CPM1
 342         help
 343           This specifies the address of the transmit descriptor
 344           used for early debug output.  Because it is needed before
 345           platform probing is done, all platforms selected must
 346           share the same address.
 347
 348 config FAIL_IOMMU
 349         bool "Fault-injection capability for IOMMU"
 350         depends on FAULT_INJECTION
 351         help
 352           Provide fault-injection capability for IOMMU. Each device can
 353           be selectively enabled via the fail_iommu property.
 354
 355           If you are unsure, say N.
 356
 357 config PPC_PTDUMP
 358         bool "Export kernel pagetable layout to userspace via debugfs"
 359         depends on DEBUG_KERNEL && DEBUG_FS
 360         help
 361           This option exports the state of the kernel pagetables to a
 362           debugfs file. This is only useful for kernel developers who are
 363           working in architecture specific areas of the kernel - probably
 364           not a good idea to enable this feature in a production kernel.
 365
 366           If you are unsure, say N.
 367
 368 config PPC_HTDUMP
 369         def_bool y
 370         depends on PPC_PTDUMP && PPC_BOOK3S
 371
 372 config PPC_DEBUG_RFI
 373         bool "Debug RFIs (Return From Interrupt)"
 374         depends on PPC_BOOK3S_64
 375         help
 376           The enables extra debug code in some RFI (Return From Interrupt)
 377           sequences, to detect that we are returning to the correct context
 378           (user, kernel or guest). This adds some performance overhead.
 379
 380           If unsure, say N.
 381
 382 endmenu