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 BDI_SWITCH
 118         bool "Include BDI-2000 user context switcher"
 119         depends on DEBUG_KERNEL && PPC32
 120         help
 121           Include in-kernel support for the Abatron BDI2000 debugger.
 122           Unless you are intending to debug the kernel with one of these
 123           machines, say N here.
 124
 125 config BOOTX_TEXT
 126         bool "Support for early boot text console (BootX or OpenFirmware only)"
 127         depends on PPC_OF && PPC_BOOK3S
 128         help
 129           Say Y here to see progress messages from the boot firmware in text
 130           mode. Requires either BootX or Open Firmware.
 131
 132 config PPC_EARLY_DEBUG
 133         bool "Early debugging (dangerous)"
 134         help
 135           Say Y to enable some early debugging facilities that may be available
 136           for your processor/board combination. Those facilities are hacks
 137           intended to debug problems early during boot, this should not be
 138           enabled in a production kernel.
 139           Note that enabling this will also cause the kernel default log level
 140           to be pushed to max automatically very early during boot
 141
 142 choice
 143         prompt "Early debugging console"
 144         depends on PPC_EARLY_DEBUG
 145         help
 146           Use the selected console for early debugging. Careful, if you
 147           enable debugging for the wrong type of machine your kernel
 148           _will not boot_.
 149
 150 config PPC_EARLY_DEBUG_LPAR
 151         bool "LPAR HV Console"
 152         depends on PPC_PSERIES
 153         help
 154           Select this to enable early debugging for a machine with a HVC
 155           console on vterm 0.
 156
 157 config PPC_EARLY_DEBUG_LPAR_HVSI
 158         bool "LPAR HVSI Console"
 159         depends on PPC_PSERIES
 160         help
 161           Select this to enable early debugging for a machine with a HVSI
 162           console on a specified vterm.
 163
 164 config PPC_EARLY_DEBUG_G5
 165         bool "Apple G5"
 166         depends on PPC_PMAC64
 167         help
 168           Select this to enable early debugging for Apple G5 machines.
 169
 170 config PPC_EARLY_DEBUG_RTAS_PANEL
 171         bool "RTAS Panel"
 172         depends on PPC_RTAS
 173         help
 174           Select this to enable early debugging via the RTAS panel.
 175
 176 config PPC_EARLY_DEBUG_RTAS_CONSOLE
 177         bool "RTAS Console"
 178         depends on PPC_RTAS
 179         select UDBG_RTAS_CONSOLE
 180         help
 181           Select this to enable early debugging via the RTAS console.
 182
 183 config PPC_EARLY_DEBUG_MAPLE
 184         bool "Maple real mode"
 185         depends on PPC_MAPLE
 186         help
 187           Select this to enable early debugging for Maple.
 188
 189 config PPC_EARLY_DEBUG_PAS_REALMODE
 190         bool "PA Semi real mode"
 191         depends on PPC_PASEMI
 192         help
 193           Select this to enable early debugging for PA Semi.
 194           Output will be on UART0.
 195
 196 config PPC_EARLY_DEBUG_BEAT
 197         bool "Beat HV Console"
 198         depends on PPC_CELLEB
 199         select PPC_UDBG_BEAT
 200         help
 201           Select this to enable early debugging for Celleb with Beat.
 202
 203 config PPC_EARLY_DEBUG_44x
 204         bool "Early serial debugging for IBM/AMCC 44x CPUs"
 205         # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
 206         # mark, which doesn't work with current 440 KVM.
 207         depends on 44x && !KVM
 208         help
 209           Select this to enable early debugging for IBM 44x chips via the
 210           inbuilt serial port.  If you enable this, ensure you set
 211           PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
 212
 213 config PPC_EARLY_DEBUG_40x
 214         bool "Early serial debugging for IBM/AMCC 40x CPUs"
 215         depends on 40x
 216         help
 217           Select this to enable early debugging for IBM 40x chips via the
 218           inbuilt serial port. This works on chips with a 16550 compatible
 219           UART. Xilinx chips with uartlite cannot use this option.
 220
 221 config PPC_EARLY_DEBUG_CPM
 222         bool "Early serial debugging for Freescale CPM-based serial ports"
 223         depends on SERIAL_CPM
 224         select PIN_TLB if PPC_8xx
 225         help
 226           Select this to enable early debugging for Freescale chips
 227           using a CPM-based serial port.  This assumes that the bootwrapper
 228           has run, and set up the CPM in a particular way.
 229
 230 config PPC_EARLY_DEBUG_USBGECKO
 231         bool "Early debugging through the USB Gecko adapter"
 232         depends on GAMECUBE_COMMON
 233         select USBGECKO_UDBG
 234         help
 235           Select this to enable early debugging for Nintendo GameCube/Wii
 236           consoles via an external USB Gecko adapter.
 237
 238 config PPC_EARLY_DEBUG_WSP
 239         bool "Early debugging via WSP's internal UART"
 240         depends on PPC_WSP
 241         select PPC_UDBG_16550
 242
 243 config PPC_EARLY_DEBUG_PS3GELIC
 244         bool "Early debugging through the PS3 Ethernet port"
 245         depends on PPC_PS3
 246         select PS3GELIC_UDBG
 247         help
 248           Select this to enable early debugging for the PlayStation3 via
 249           UDP broadcasts sent out through the Ethernet port.
 250
 251 config PPC_EARLY_DEBUG_OPAL_RAW
 252         bool "OPAL raw console"
 253         depends on HVC_OPAL
 254         help
 255           Select this to enable early debugging for the PowerNV platform
 256           using a "raw" console
 257
 258 config PPC_EARLY_DEBUG_OPAL_HVSI
 259         bool "OPAL hvsi console"
 260         depends on HVC_OPAL
 261         help
 262           Select this to enable early debugging for the PowerNV platform
 263           using an "hvsi" console
 264
 265 config PPC_EARLY_DEBUG_MEMCONS
 266         bool "In memory console"
 267         help
 268           Select this to enable early debugging using an in memory console.
 269           This console provides input and output buffers stored within the
 270           kernel BSS and should be safe to select on any system. A debugger
 271           can then be used to read kernel output or send input to the console.
 272 endchoice
 273
 274 config PPC_MEMCONS_OUTPUT_SIZE
 275         int "In memory console output buffer size"
 276         depends on PPC_EARLY_DEBUG_MEMCONS
 277         default 4096
 278         help
 279           Selects the size of the output buffer (in bytes) of the in memory
 280           console.
 281
 282 config PPC_MEMCONS_INPUT_SIZE
 283         int "In memory console input buffer size"
 284         depends on PPC_EARLY_DEBUG_MEMCONS
 285         default 128
 286         help
 287           Selects the size of the input buffer (in bytes) of the in memory
 288           console.
 289
 290 config PPC_EARLY_DEBUG_OPAL
 291         def_bool y
 292         depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
 293
 294
 295 config PPC_EARLY_DEBUG_HVSI_VTERMNO
 296         hex "vterm number to use with early debug HVSI"
 297         depends on PPC_EARLY_DEBUG_LPAR_HVSI
 298         default "0x30000000"
 299         help
 300           You probably want 0x30000000 for your first serial port and
 301           0x30000001 for your second one
 302
 303 config PPC_EARLY_DEBUG_OPAL_VTERMNO
 304         hex "vterm number to use with OPAL early debug"
 305         depends on PPC_EARLY_DEBUG_OPAL
 306         default "0"
 307         help
 308           This correspond to which /dev/hvcN you want to use for early
 309           debug.
 310
 311           On OPAL v1 (takeover) this should always be 0
 312           On OPAL v2, this will be 0 for network console and 1 or 2 for
 313           the machine built-in serial ports.
 314
 315 config PPC_EARLY_DEBUG_44x_PHYSLOW
 316         hex "Low 32 bits of early debug UART physical address"
 317         depends on PPC_EARLY_DEBUG_44x
 318         default "0x40000200"
 319         help
 320           You probably want 0x40000200 for ebony boards and
 321           0x40000300 for taishan
 322
 323 config PPC_EARLY_DEBUG_44x_PHYSHIGH
 324         hex "EPRN of early debug UART physical address"
 325         depends on PPC_EARLY_DEBUG_44x
 326         default "0x1"
 327
 328 config PPC_EARLY_DEBUG_40x_PHYSADDR
 329         hex "Early debug UART physical address"
 330         depends on PPC_EARLY_DEBUG_40x
 331         default "0xef600300"
 332
 333 config PPC_EARLY_DEBUG_CPM_ADDR
 334         hex "CPM UART early debug transmit descriptor address"
 335         depends on PPC_EARLY_DEBUG_CPM
 336         default "0xfa202008" if PPC_EP88XC
 337         default "0xf0001ff8" if CPM2
 338         default "0xff002008" if CPM1
 339         help
 340           This specifies the address of the transmit descriptor
 341           used for early debug output.  Because it is needed before
 342           platform probing is done, all platforms selected must
 343           share the same address.
 344
 345 config STRICT_DEVMEM
 346         def_bool y
 347         prompt "Filter access to /dev/mem"
 348         help
 349           This option restricts access to /dev/mem.  If this option is
 350           disabled, you allow userspace access to all memory, including
 351           kernel and userspace memory. Accidental memory access is likely
 352           to be disastrous.
 353           Memory access is required for experts who want to debug the kernel.
 354
 355           If you are unsure, say Y.
 356
 357 config FAIL_IOMMU
 358         bool "Fault-injection capability for IOMMU"
 359         depends on FAULT_INJECTION
 360         help
 361           Provide fault-injection capability for IOMMU. Each device can
 362           be selectively enabled via the fail_iommu property.
 363
 364           If you are unsure, say N.
 365
 366 endmenu