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 FTR_FIXUP_SELFTEST
  64         bool "Run self-tests of the feature-fixup code."
  65         depends on DEBUG_KERNEL
  66         default n
  67
  68 config MSI_BITMAP_SELFTEST
  69         bool "Run self-tests of the MSI bitmap code."
  70         depends on DEBUG_KERNEL
  71         default n
  72
  73 config XMON
  74         bool "Include xmon kernel debugger"
  75         depends on DEBUG_KERNEL
  76         help
  77           Include in-kernel hooks for the xmon kernel monitor/debugger.
  78           Unless you are intending to debug the kernel, say N here.
  79           Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
  80           nothing will appear on the screen (xmon writes directly to the
  81           framebuffer memory).
  82           The cmdline option 'xmon' or 'xmon=early' will drop into xmon
  83           very early during boot. 'xmon=on' will just enable the xmon
  84           debugger hooks.  'xmon=off' will disable the debugger hooks
  85           if CONFIG_XMON_DEFAULT is set.
  86           xmon will print a backtrace on the very first invocation.
  87           'xmon=nobt' will disable this autobacktrace.
  88
  89 config XMON_DEFAULT
  90         bool "Enable xmon by default"
  91         depends on XMON
  92         help
  93           xmon is normally disabled unless booted with 'xmon=on'.
  94           Use 'xmon=off' to disable xmon init during runtime.
  95
  96 config XMON_DISASSEMBLY
  97         bool "Include disassembly support in xmon"
  98         depends on XMON
  99         default y
 100         help
 101           Include support for disassembling in xmon. You probably want
 102           to say Y here, unless you're building for a memory-constrained
 103           system.
 104
 105 config DEBUGGER
 106         bool
 107         depends on KGDB || XMON
 108         default y
 109
 110 config BDI_SWITCH
 111         bool "Include BDI-2000 user context switcher"
 112         depends on DEBUG_KERNEL && PPC32
 113         help
 114           Include in-kernel support for the Abatron BDI2000 debugger.
 115           Unless you are intending to debug the kernel with one of these
 116           machines, say N here.
 117
 118 config BOOTX_TEXT
 119         bool "Support for early boot text console (BootX or OpenFirmware only)"
 120         depends on PPC_OF && PPC_BOOK3S
 121         help
 122           Say Y here to see progress messages from the boot firmware in text
 123           mode. Requires either BootX or Open Firmware.
 124
 125 config PPC_EARLY_DEBUG
 126         bool "Early debugging (dangerous)"
 127         help
 128           Say Y to enable some early debugging facilities that may be available
 129           for your processor/board combination. Those facilities are hacks
 130           intended to debug problems early during boot, this should not be
 131           enabled in a production kernel.
 132           Note that enabling this will also cause the kernel default log level
 133           to be pushed to max automatically very early during boot
 134
 135 choice
 136         prompt "Early debugging console"
 137         depends on PPC_EARLY_DEBUG
 138         help
 139           Use the selected console for early debugging. Careful, if you
 140           enable debugging for the wrong type of machine your kernel
 141           _will not boot_.
 142
 143 config PPC_EARLY_DEBUG_BOOTX
 144         bool "BootX or OpenFirmware"
 145         depends on BOOTX_TEXT
 146         help
 147           Select this to enable early debugging for a machine using BootX
 148           or OpenFirmware.
 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_PS3GELIC
 239         bool "Early debugging through the PS3 Ethernet port"
 240         depends on PPC_PS3
 241         select PS3GELIC_UDBG
 242         help
 243           Select this to enable early debugging for the PlayStation3 via
 244           UDP broadcasts sent out through the Ethernet port.
 245
 246 config PPC_EARLY_DEBUG_OPAL_RAW
 247         bool "OPAL raw console"
 248         depends on HVC_OPAL
 249         help
 250           Select this to enable early debugging for the PowerNV platform
 251           using a "raw" console
 252
 253 config PPC_EARLY_DEBUG_OPAL_HVSI
 254         bool "OPAL hvsi console"
 255         depends on HVC_OPAL
 256         help
 257           Select this to enable early debugging for the PowerNV platform
 258           using an "hvsi" console
 259
 260 config PPC_EARLY_DEBUG_MEMCONS
 261         bool "In memory console"
 262         help
 263           Select this to enable early debugging using an in memory console.
 264           This console provides input and output buffers stored within the
 265           kernel BSS and should be safe to select on any system. A debugger
 266           can then be used to read kernel output or send input to the console.
 267 endchoice
 268
 269 config PPC_MEMCONS_OUTPUT_SIZE
 270         int "In memory console output buffer size"
 271         depends on PPC_EARLY_DEBUG_MEMCONS
 272         default 4096
 273         help
 274           Selects the size of the output buffer (in bytes) of the in memory
 275           console.
 276
 277 config PPC_MEMCONS_INPUT_SIZE
 278         int "In memory console input buffer size"
 279         depends on PPC_EARLY_DEBUG_MEMCONS
 280         default 128
 281         help
 282           Selects the size of the input buffer (in bytes) of the in memory
 283           console.
 284
 285 config PPC_EARLY_DEBUG_OPAL
 286         def_bool y
 287         depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
 288
 289
 290 config PPC_EARLY_DEBUG_HVSI_VTERMNO
 291         hex "vterm number to use with early debug HVSI"
 292         depends on PPC_EARLY_DEBUG_LPAR_HVSI
 293         default "0x30000000"
 294         help
 295           You probably want 0x30000000 for your first serial port and
 296           0x30000001 for your second one
 297
 298 config PPC_EARLY_DEBUG_OPAL_VTERMNO
 299         hex "vterm number to use with OPAL early debug"
 300         depends on PPC_EARLY_DEBUG_OPAL
 301         default "0"
 302         help
 303           This correspond to which /dev/hvcN you want to use for early
 304           debug.
 305
 306           On OPAL v1 (takeover) this should always be 0
 307           On OPAL v2, this will be 0 for network console and 1 or 2 for
 308           the machine built-in serial ports.
 309
 310 config PPC_EARLY_DEBUG_44x_PHYSLOW
 311         hex "Low 32 bits of early debug UART physical address"
 312         depends on PPC_EARLY_DEBUG_44x
 313         default "0x40000200"
 314         help
 315           You probably want 0x40000200 for ebony boards and
 316           0x40000300 for taishan
 317
 318 config PPC_EARLY_DEBUG_44x_PHYSHIGH
 319         hex "EPRN of early debug UART physical address"
 320         depends on PPC_EARLY_DEBUG_44x
 321         default "0x1"
 322
 323 config PPC_EARLY_DEBUG_40x_PHYSADDR
 324         hex "Early debug UART physical address"
 325         depends on PPC_EARLY_DEBUG_40x
 326         default "0xef600300"
 327
 328 config PPC_EARLY_DEBUG_CPM_ADDR
 329         hex "CPM UART early debug transmit descriptor address"
 330         depends on PPC_EARLY_DEBUG_CPM
 331         default "0xfa202008" if PPC_EP88XC
 332         default "0xf0001ff8" if CPM2
 333         default "0xff002008" if CPM1
 334         help
 335           This specifies the address of the transmit descriptor
 336           used for early debug output.  Because it is needed before
 337           platform probing is done, all platforms selected must
 338           share the same address.
 339
 340 config STRICT_DEVMEM
 341         def_bool y
 342         prompt "Filter access to /dev/mem"
 343         help
 344           This option restricts access to /dev/mem.  If this option is
 345           disabled, you allow userspace access to all memory, including
 346           kernel and userspace memory. Accidental memory access is likely
 347           to be disastrous.
 348           Memory access is required for experts who want to debug the kernel.
 349
 350           If you are unsure, say Y.
 351
 352 config FAIL_IOMMU
 353         bool "Fault-injection capability for IOMMU"
 354         depends on FAULT_INJECTION
 355         help
 356           Provide fault-injection capability for IOMMU. Each device can
 357           be selectively enabled via the fail_iommu property.
 358
 359           If you are unsure, say N.
 360
 361 endmenu