# SPDX-License-Identifier: GPL-2.0 config PPC_DISABLE_WERROR bool "Don't build arch/powerpc code with -Werror" 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 config JUMP_LABEL_FEATURE_CHECKS bool "Enable use of jump label for cpu/mmu_has_feature()" depends on JUMP_LABEL default y help Selecting this options enables use of jump labels for some internal feature checks. This should generate more optimal code for those checks. config JUMP_LABEL_FEATURE_CHECK_DEBUG bool "Do extra check on feature fixup calls" depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS help This tries to catch incorrect usage of cpu_has_feature() and mmu_has_feature() in the code. If you don't know what this means, say N. config FTR_FIXUP_SELFTEST bool "Run self-tests of the feature-fixup code" depends on DEBUG_KERNEL config MSI_BITMAP_SELFTEST bool "Run self-tests of the MSI bitmap code" depends on DEBUG_KERNEL config PPC_IRQ_SOFT_MASK_DEBUG bool "Include extra checks for powerpc irq soft masking" depends on PPC64 config PPC_RFI_SRR_DEBUG bool "Include extra checks for RFI SRR register validity" depends on PPC_BOOK3S_64 config XMON bool "Include xmon kernel debugger" depends on DEBUG_KERNEL select CONSOLE_POLL if SERIAL_CPM_CONSOLE 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 XMON_DEFAULT_RO_MODE bool "Restrict xmon to read-only operations by default" depends on XMON default y help Operate xmon in read-only mode. The cmdline options 'xmon=rw' and 'xmon=ro' override this default. 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_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 && HVC_CONSOLE 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 && HVC_CONSOLE 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_44x bool "Early serial debugging for IBM/AMCC 44x CPUs" depends on 44x 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. config PPC_EARLY_DEBUG_CPM bool "Early serial debugging for Freescale CPM-based serial ports" depends on SERIAL_CPM=y 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_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. config PPC_EARLY_DEBUG_16550 bool "Serial 16550" depends on PPC_UDBG_16550 help Select this to enable early debugging via Serial 16550 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 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 PPC_EARLY_DEBUG_16550_PHYSADDR hex "Early debug Serial 16550 physical address" depends on PPC_EARLY_DEBUG_16550 config PPC_EARLY_DEBUG_16550_STRIDE int "Early debug Serial 16550 stride" depends on PPC_EARLY_DEBUG_16550 default 1 config FAIL_IOMMU bool "Fault-injection capability for IOMMU" depends on FAULT_INJECTION depends on PCI || IBMVIO help Provide fault-injection capability for IOMMU. Each device can be selectively enabled via the fail_iommu property. If you are unsure, say N. config PPC_FAST_ENDIAN_SWITCH bool "Deprecated fast endian-switch syscall" depends on DEBUG_KERNEL && PPC_BOOK3S_64 help If you're unsure what this is, say N. config KASAN_SHADOW_OFFSET hex depends on KASAN default 0xe0000000 if PPC32 default 0xa80e000000000000 if PPC_BOOK3S_64 default 0xa8001c0000000000 if PPC_BOOK3E_64