1 # SPDX-License-Identifier: GPL-2.0
3 config PPC_DISABLE_WERROR
4 bool "Don't build arch/powerpc code with -Werror"
6 This option tells the compiler NOT to build the code under
7 arch/powerpc with the -Werror flag (which means warnings
8 are treated as errors).
10 Only enable this if you are hitting a build failure in the
11 arch/powerpc code caused by a warning, and you don't feel
16 depends on !PPC_DISABLE_WERROR
19 config PRINT_STACK_DEPTH
20 int "Stack depth to print" if DEBUG_KERNEL
23 This option allows you to set the stack depth that the kernel
24 prints in stack traces. This can be useful if your display is
25 too small and stack traces cause important information to
26 scroll off the screen.
29 bool "Hypervisor call instrumentation"
30 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
32 Adds code to keep track of the number of hypervisor calls made and
33 the amount of time spent in hypervisor calls. Wall time spent in
34 each call is always calculated, and if available CPU cycles spent
35 are also calculated. A directory named hcall_inst is added at the
36 root of the debugfs filesystem. Within the hcall_inst directory
37 are files that contain CPU specific call statistics.
39 This option will add a small amount of overhead to all hypervisor
42 config PPC_EMULATED_STATS
43 bool "Emulated instructions tracking"
46 Adds code to keep track of the number of instructions that are
47 emulated by the in-kernel emulator. Counters for the various classes
48 of emulated instructions are available under
49 powerpc/emulated_instructions/ in the root of the debugfs file
50 system. Optionally (controlled by
51 powerpc/emulated_instructions/do_warn in debugfs), rate-limited
52 warnings can be printed to the console when instructions are
55 config CODE_PATCHING_SELFTEST
56 bool "Run self-tests of the code-patching code"
57 depends on DEBUG_KERNEL
59 config JUMP_LABEL_FEATURE_CHECKS
60 bool "Enable use of jump label for cpu/mmu_has_feature()"
64 Selecting this options enables use of jump labels for some internal
65 feature checks. This should generate more optimal code for those
68 config JUMP_LABEL_FEATURE_CHECK_DEBUG
69 bool "Do extra check on feature fixup calls"
70 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
72 This tries to catch incorrect usage of cpu_has_feature() and
73 mmu_has_feature() in the code.
75 If you don't know what this means, say N.
77 config FTR_FIXUP_SELFTEST
78 bool "Run self-tests of the feature-fixup code"
79 depends on DEBUG_KERNEL
81 config MSI_BITMAP_SELFTEST
82 bool "Run self-tests of the MSI bitmap code"
83 depends on DEBUG_KERNEL
85 config PPC_IRQ_SOFT_MASK_DEBUG
86 bool "Include extra checks for powerpc irq soft masking"
89 bool "Include xmon kernel debugger"
90 depends on DEBUG_KERNEL
92 Include in-kernel hooks for the xmon kernel monitor/debugger.
93 Unless you are intending to debug the kernel, say N here.
94 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
95 nothing will appear on the screen (xmon writes directly to the
97 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
98 very early during boot. 'xmon=on' will just enable the xmon
99 debugger hooks. 'xmon=off' will disable the debugger hooks
100 if CONFIG_XMON_DEFAULT is set.
101 xmon will print a backtrace on the very first invocation.
102 'xmon=nobt' will disable this autobacktrace.
105 bool "Enable xmon by default"
108 xmon is normally disabled unless booted with 'xmon=on'.
109 Use 'xmon=off' to disable xmon init during runtime.
111 config XMON_DISASSEMBLY
112 bool "Include disassembly support in xmon"
116 Include support for disassembling in xmon. You probably want
117 to say Y here, unless you're building for a memory-constrained
122 depends on KGDB || XMON
126 bool "Include BDI-2000 user context switcher"
127 depends on DEBUG_KERNEL && PPC32
129 Include in-kernel support for the Abatron BDI2000 debugger.
130 Unless you are intending to debug the kernel with one of these
131 machines, say N here.
134 bool "Support for early boot text console (BootX or OpenFirmware only)"
135 depends on PPC_BOOK3S
137 Say Y here to see progress messages from the boot firmware in text
138 mode. Requires either BootX or Open Firmware.
140 config PPC_EARLY_DEBUG
141 bool "Early debugging (dangerous)"
143 Say Y to enable some early debugging facilities that may be available
144 for your processor/board combination. Those facilities are hacks
145 intended to debug problems early during boot, this should not be
146 enabled in a production kernel.
147 Note that enabling this will also cause the kernel default log level
148 to be pushed to max automatically very early during boot
151 prompt "Early debugging console"
152 depends on PPC_EARLY_DEBUG
154 Use the selected console for early debugging. Careful, if you
155 enable debugging for the wrong type of machine your kernel
158 config PPC_EARLY_DEBUG_BOOTX
159 bool "BootX or OpenFirmware"
160 depends on BOOTX_TEXT
162 Select this to enable early debugging for a machine using BootX
165 config PPC_EARLY_DEBUG_LPAR
166 bool "LPAR HV Console"
167 depends on PPC_PSERIES && HVC_CONSOLE
169 Select this to enable early debugging for a machine with a HVC
172 config PPC_EARLY_DEBUG_LPAR_HVSI
173 bool "LPAR HVSI Console"
174 depends on PPC_PSERIES && HVC_CONSOLE
176 Select this to enable early debugging for a machine with a HVSI
177 console on a specified vterm.
179 config PPC_EARLY_DEBUG_G5
181 depends on PPC_PMAC64
183 Select this to enable early debugging for Apple G5 machines.
185 config PPC_EARLY_DEBUG_RTAS_PANEL
189 Select this to enable early debugging via the RTAS panel.
191 config PPC_EARLY_DEBUG_RTAS_CONSOLE
194 select UDBG_RTAS_CONSOLE
196 Select this to enable early debugging via the RTAS console.
198 config PPC_EARLY_DEBUG_MAPLE
199 bool "Maple real mode"
202 Select this to enable early debugging for Maple.
204 config PPC_EARLY_DEBUG_PAS_REALMODE
205 bool "PA Semi real mode"
206 depends on PPC_PASEMI
208 Select this to enable early debugging for PA Semi.
209 Output will be on UART0.
211 config PPC_EARLY_DEBUG_44x
212 bool "Early serial debugging for IBM/AMCC 44x CPUs"
215 Select this to enable early debugging for IBM 44x chips via the
216 inbuilt serial port. If you enable this, ensure you set
217 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
219 config PPC_EARLY_DEBUG_40x
220 bool "Early serial debugging for IBM/AMCC 40x CPUs"
223 Select this to enable early debugging for IBM 40x chips via the
224 inbuilt serial port. This works on chips with a 16550 compatible
225 UART. Xilinx chips with uartlite cannot use this option.
227 config PPC_EARLY_DEBUG_CPM
228 bool "Early serial debugging for Freescale CPM-based serial ports"
229 depends on SERIAL_CPM
231 Select this to enable early debugging for Freescale chips
232 using a CPM-based serial port. This assumes that the bootwrapper
233 has run, and set up the CPM in a particular way.
235 config PPC_EARLY_DEBUG_USBGECKO
236 bool "Early debugging through the USB Gecko adapter"
237 depends on GAMECUBE_COMMON
240 Select this to enable early debugging for Nintendo GameCube/Wii
241 consoles via an external USB Gecko adapter.
243 config PPC_EARLY_DEBUG_PS3GELIC
244 bool "Early debugging through the PS3 Ethernet port"
248 Select this to enable early debugging for the PlayStation3 via
249 UDP broadcasts sent out through the Ethernet port.
251 config PPC_EARLY_DEBUG_OPAL_RAW
252 bool "OPAL raw console"
255 Select this to enable early debugging for the PowerNV platform
256 using a "raw" console
258 config PPC_EARLY_DEBUG_OPAL_HVSI
259 bool "OPAL hvsi console"
262 Select this to enable early debugging for the PowerNV platform
263 using an "hvsi" console
265 config PPC_EARLY_DEBUG_MEMCONS
266 bool "In memory console"
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.
274 config PPC_MEMCONS_OUTPUT_SIZE
275 int "In memory console output buffer size"
276 depends on PPC_EARLY_DEBUG_MEMCONS
279 Selects the size of the output buffer (in bytes) of the in memory
282 config PPC_MEMCONS_INPUT_SIZE
283 int "In memory console input buffer size"
284 depends on PPC_EARLY_DEBUG_MEMCONS
287 Selects the size of the input buffer (in bytes) of the in memory
290 config PPC_EARLY_DEBUG_OPAL
292 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
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
300 You probably want 0x30000000 for your first serial port and
301 0x30000001 for your second one
303 config PPC_EARLY_DEBUG_OPAL_VTERMNO
304 hex "vterm number to use with OPAL early debug"
305 depends on PPC_EARLY_DEBUG_OPAL
308 This correspond to which /dev/hvcN you want to use for early
311 On OPAL v2, this will be 0 for network console and 1 or 2 for
312 the machine built-in serial ports.
314 config PPC_EARLY_DEBUG_44x_PHYSLOW
315 hex "Low 32 bits of early debug UART physical address"
316 depends on PPC_EARLY_DEBUG_44x
319 You probably want 0x40000200 for ebony boards and
320 0x40000300 for taishan
322 config PPC_EARLY_DEBUG_44x_PHYSHIGH
323 hex "EPRN of early debug UART physical address"
324 depends on PPC_EARLY_DEBUG_44x
327 config PPC_EARLY_DEBUG_40x_PHYSADDR
328 hex "Early debug UART physical address"
329 depends on PPC_EARLY_DEBUG_40x
332 config PPC_EARLY_DEBUG_CPM_ADDR
333 hex "CPM UART early debug transmit descriptor address"
334 depends on PPC_EARLY_DEBUG_CPM
335 default "0xfa202008" if PPC_EP88XC
336 default "0xf0001ff8" if CPM2
337 default "0xff002008" if CPM1
339 This specifies the address of the transmit descriptor
340 used for early debug output. Because it is needed before
341 platform probing is done, all platforms selected must
342 share the same address.
345 bool "Fault-injection capability for IOMMU"
346 depends on FAULT_INJECTION
348 Provide fault-injection capability for IOMMU. Each device can
349 be selectively enabled via the fail_iommu property.
351 If you are unsure, say N.
354 bool "Export kernel pagetable layout to userspace via debugfs"
355 depends on DEBUG_KERNEL && DEBUG_FS
357 This option exports the state of the kernel pagetables to a
358 debugfs file. This is only useful for kernel developers who are
359 working in architecture specific areas of the kernel - probably
360 not a good idea to enable this feature in a production kernel.
362 If you are unsure, say N.
366 depends on PPC_PTDUMP && PPC_BOOK3S_64
368 config PPC_FAST_ENDIAN_SWITCH
369 bool "Deprecated fast endian-switch syscall"
370 depends on DEBUG_KERNEL && PPC_BOOK3S_64
372 If you're unsure what this is, say N.