menu "Kernel hacking" source "lib/Kconfig.debug" config PPC_DISABLE_WERROR	bool "Don't build arch/powerpc code with -Werror"	default n	help	  This option tells the compiler NOT to build the code under	  arch/powerpc with the -Werror flag (which means warnings	  are treated as errors). 	  Only enable this if you are hitting a build failure in the	  arch/powerpc code caused by a warning, and you don't feel	  inclined to fix it. config PPC_WERROR	bool	depends on !PPC_DISABLE_WERROR	default y config PRINT_STACK_DEPTH	int "Stack depth to print" if DEBUG_KERNEL	default 64	help	  This option allows you to set the stack depth that the kernel	  prints in stack traces. This can be useful if your display is	  too small and stack traces cause important information to	  scroll off the screen. config HCALL_STATS	bool "Hypervisor call instrumentation"	depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS	help	  Adds code to keep track of the number of hypervisor calls made and	  the amount of time spent in hypervisor calls.  Wall time spent in	  each call is always calculated, and if available CPU cycles spent	  are also calculated.  A directory named hcall_inst is added at the	  root of the debugfs filesystem.  Within the hcall_inst directory	  are files that contain CPU specific call statistics. 	  This option will add a small amount of overhead to all hypervisor	  calls. config PPC_EMULATED_STATS	bool "Emulated instructions tracking"	depends on DEBUG_FS	help	  Adds code to keep track of the number of instructions that are	  emulated by the in-kernel emulator. Counters for the various classes	  of emulated instructions are available under	  powerpc/emulated_instructions/ in the root of the debugfs file	  system. Optionally (controlled by	  powerpc/emulated_instructions/do_warn in debugfs), rate-limited	  warnings can be printed to the console when instructions are	  emulated. config CODE_PATCHING_SELFTEST	bool "Run self-tests of the code-patching code."	depends on DEBUG_KERNEL	default n config FTR_FIXUP_SELFTEST	bool "Run self-tests of the feature-fixup code."	depends on DEBUG_KERNEL	default n config MSI_BITMAP_SELFTEST	bool "Run self-tests of the MSI bitmap code."	depends on DEBUG_KERNEL	default n config XMON	bool "Include xmon kernel debugger"	depends on DEBUG_KERNEL	help	  Include in-kernel hooks for the xmon kernel monitor/debugger.	  Unless you are intending to debug the kernel, say N here.	  Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise	  nothing will appear on the screen (xmon writes directly to the	  framebuffer memory).	  The cmdline option 'xmon' or 'xmon=early' will drop into xmon	  very early during boot. 'xmon=on' will just enable the xmon	  debugger hooks.  'xmon=off' will disable the debugger hooks	  if CONFIG_XMON_DEFAULT is set.	  xmon will print a backtrace on the very first invocation.	  'xmon=nobt' will disable this autobacktrace. config XMON_DEFAULT	bool "Enable xmon by default"	depends on XMON	help	  xmon is normally disabled unless booted with 'xmon=on'.	  Use 'xmon=off' to disable xmon init during runtime. config XMON_DISASSEMBLY	bool "Include disassembly support in xmon"	depends on XMON	default y	help	  Include support for disassembling in xmon. You probably want	  to say Y here, unless you're building for a memory-constrained	  system. config DEBUGGER	bool	depends on KGDB || XMON	default y config BDI_SWITCH	bool "Include BDI-2000 user context switcher"	depends on DEBUG_KERNEL && PPC32	help	  Include in-kernel support for the Abatron BDI2000 debugger.	  Unless you are intending to debug the kernel with one of these	  machines, say N here. config BOOTX_TEXT	bool "Support for early boot text console (BootX or OpenFirmware only)"	depends on PPC_OF && PPC_BOOK3S	help	  Say Y here to see progress messages from the boot firmware in text	  mode. Requires either BootX or Open Firmware. config PPC_EARLY_DEBUG	bool "Early debugging (dangerous)"	help	  Say Y to enable some early debugging facilities that may be available	  for your processor/board combination. Those facilities are hacks	  intended to debug problems early during boot, this should not be	  enabled in a production kernel.	  Note that enabling this will also cause the kernel default log level	  to be pushed to max automatically very early during boot choice	prompt "Early debugging console"	depends on PPC_EARLY_DEBUG	help	  Use the selected console for early debugging. Careful, if you	  enable debugging for the wrong type of machine your kernel	  _will not boot_. config PPC_EARLY_DEBUG_BOOTX	bool "BootX or OpenFirmware"	depends on BOOTX_TEXT	help	  Select this to enable early debugging for a machine using BootX	  or OpenFirmware. config PPC_EARLY_DEBUG_LPAR	bool "LPAR HV Console"	depends on PPC_PSERIES	help	  Select this to enable early debugging for a machine with a HVC	  console on vterm 0. config PPC_EARLY_DEBUG_LPAR_HVSI	bool "LPAR HVSI Console"	depends on PPC_PSERIES	help	  Select this to enable early debugging for a machine with a HVSI	  console on a specified vterm. config PPC_EARLY_DEBUG_G5	bool "Apple G5"	depends on PPC_PMAC64	help	  Select this to enable early debugging for Apple G5 machines. config PPC_EARLY_DEBUG_RTAS_PANEL	bool "RTAS Panel"	depends on PPC_RTAS	help	  Select this to enable early debugging via the RTAS panel. config PPC_EARLY_DEBUG_RTAS_CONSOLE	bool "RTAS Console"	depends on PPC_RTAS	select UDBG_RTAS_CONSOLE	help	  Select this to enable early debugging via the RTAS console. config PPC_EARLY_DEBUG_MAPLE	bool "Maple real mode"	depends on PPC_MAPLE	help	  Select this to enable early debugging for Maple. config PPC_EARLY_DEBUG_PAS_REALMODE	bool "PA Semi real mode"	depends on PPC_PASEMI	help	  Select this to enable early debugging for PA Semi.	  Output will be on UART0. config PPC_EARLY_DEBUG_BEAT	bool "Beat HV Console"	depends on PPC_CELLEB	select PPC_UDBG_BEAT	help	  Select this to enable early debugging for Celleb with Beat. config PPC_EARLY_DEBUG_44x	bool "Early serial debugging for IBM/AMCC 44x CPUs"	# PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water	# mark, which doesn't work with current 440 KVM.	depends on 44x && !KVM	help	  Select this to enable early debugging for IBM 44x chips via the	  inbuilt serial port.  If you enable this, ensure you set          PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board. config PPC_EARLY_DEBUG_40x	bool "Early serial debugging for IBM/AMCC 40x CPUs"	depends on 40x	help	  Select this to enable early debugging for IBM 40x chips via the	  inbuilt serial port. This works on chips with a 16550 compatible	  UART. Xilinx chips with uartlite cannot use this option. config PPC_EARLY_DEBUG_CPM	bool "Early serial debugging for Freescale CPM-based serial ports"	depends on SERIAL_CPM	select PIN_TLB if PPC_8xx	help	  Select this to enable early debugging for Freescale chips	  using a CPM-based serial port.  This assumes that the bootwrapper	  has run, and set up the CPM in a particular way. config PPC_EARLY_DEBUG_USBGECKO	bool "Early debugging through the USB Gecko adapter"	depends on GAMECUBE_COMMON	select USBGECKO_UDBG	help	  Select this to enable early debugging for Nintendo GameCube/Wii	  consoles via an external USB Gecko adapter. config PPC_EARLY_DEBUG_WSP	bool "Early debugging via WSP's internal UART"	depends on PPC_WSP	select PPC_UDBG_16550 config PPC_EARLY_DEBUG_PS3GELIC	bool "Early debugging through the PS3 Ethernet port"	depends on PPC_PS3	select PS3GELIC_UDBG	help	  Select this to enable early debugging for the PlayStation3 via	  UDP broadcasts sent out through the Ethernet port. config PPC_EARLY_DEBUG_OPAL_RAW	bool "OPAL raw console"	depends on HVC_OPAL	help	  Select this to enable early debugging for the PowerNV platform	  using a "raw" console config PPC_EARLY_DEBUG_OPAL_HVSI	bool "OPAL hvsi console"	depends on HVC_OPAL	help	  Select this to enable early debugging for the PowerNV platform	  using an "hvsi" console config PPC_EARLY_DEBUG_MEMCONS	bool "In memory console"	help	  Select this to enable early debugging using an in memory console.	  This console provides input and output buffers stored within the	  kernel BSS and should be safe to select on any system. A debugger	  can then be used to read kernel output or send input to the console.endchoice config PPC_MEMCONS_OUTPUT_SIZE	int "In memory console output buffer size"	depends on PPC_EARLY_DEBUG_MEMCONS	default 4096	help	  Selects the size of the output buffer (in bytes) of the in memory	  console. config PPC_MEMCONS_INPUT_SIZE	int "In memory console input buffer size"	depends on PPC_EARLY_DEBUG_MEMCONS	default 128	help	  Selects the size of the input buffer (in bytes) of the in memory	  console. config PPC_EARLY_DEBUG_OPAL	def_bool y	depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI  config PPC_EARLY_DEBUG_HVSI_VTERMNO	hex "vterm number to use with early debug HVSI"	depends on PPC_EARLY_DEBUG_LPAR_HVSI	default "0x30000000"	help	  You probably want 0x30000000 for your first serial port and	  0x30000001 for your second one config PPC_EARLY_DEBUG_OPAL_VTERMNO	hex "vterm number to use with OPAL early debug"	depends on PPC_EARLY_DEBUG_OPAL	default "0"	help	  This correspond to which /dev/hvcN you want to use for early	  debug. 	  On OPAL v1 (takeover) this should always be 0	  On OPAL v2, this will be 0 for network console and 1 or 2 for	  the machine built-in serial ports. config PPC_EARLY_DEBUG_44x_PHYSLOW	hex "Low 32 bits of early debug UART physical address"	depends on PPC_EARLY_DEBUG_44x	default "0x40000200"	help	  You probably want 0x40000200 for ebony boards and          0x40000300 for taishan config PPC_EARLY_DEBUG_44x_PHYSHIGH	hex "EPRN of early debug UART physical address"	depends on PPC_EARLY_DEBUG_44x	default "0x1" config PPC_EARLY_DEBUG_40x_PHYSADDR	hex "Early debug UART physical address"	depends on PPC_EARLY_DEBUG_40x	default "0xef600300" config PPC_EARLY_DEBUG_CPM_ADDR	hex "CPM UART early debug transmit descriptor address"	depends on PPC_EARLY_DEBUG_CPM	default "0xfa202008" if PPC_EP88XC	default "0xf0001ff8" if CPM2	default "0xff002008" if CPM1	help	  This specifies the address of the transmit descriptor	  used for early debug output.  Because it is needed before	  platform probing is done, all platforms selected must	  share the same address. config STRICT_DEVMEM	def_bool y	prompt "Filter access to /dev/mem"	help	  This option restricts access to /dev/mem.  If this option is	  disabled, you allow userspace access to all memory, including	  kernel and userspace memory. Accidental memory access is likely	  to be disastrous.	  Memory access is required for experts who want to debug the kernel. 	  If you are unsure, say Y. config FAIL_IOMMU	bool "Fault-injection capability for IOMMU"	depends on FAULT_INJECTION	help	  Provide fault-injection capability for IOMMU. Each device can	  be selectively enabled via the fail_iommu property. 	  If you are unsure, say N. endmenu