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
120 config XMON_DEFAULT_RO_MODE
121 bool "Restrict xmon to read-only operations by default"
125 Operate xmon in read-only mode. The cmdline options 'xmon=rw' and
126 'xmon=ro' override this default.
130 depends on KGDB || XMON
134 bool "Include BDI-2000 user context switcher"
135 depends on DEBUG_KERNEL && PPC32
137 Include in-kernel support for the Abatron BDI2000 debugger.
138 Unless you are intending to debug the kernel with one of these
139 machines, say N here.
142 bool "Support for early boot text console (BootX or OpenFirmware only)"
143 depends on PPC_BOOK3S
145 Say Y here to see progress messages from the boot firmware in text
146 mode. Requires either BootX or Open Firmware.
148 config PPC_EARLY_DEBUG
149 bool "Early debugging (dangerous)"
151 Say Y to enable some early debugging facilities that may be available
152 for your processor/board combination. Those facilities are hacks
153 intended to debug problems early during boot, this should not be
154 enabled in a production kernel.
155 Note that enabling this will also cause the kernel default log level
156 to be pushed to max automatically very early during boot
159 prompt "Early debugging console"
160 depends on PPC_EARLY_DEBUG
162 Use the selected console for early debugging. Careful, if you
163 enable debugging for the wrong type of machine your kernel
166 config PPC_EARLY_DEBUG_BOOTX
167 bool "BootX or OpenFirmware"
168 depends on BOOTX_TEXT
170 Select this to enable early debugging for a machine using BootX
173 config PPC_EARLY_DEBUG_LPAR
174 bool "LPAR HV Console"
175 depends on PPC_PSERIES && HVC_CONSOLE
177 Select this to enable early debugging for a machine with a HVC
180 config PPC_EARLY_DEBUG_LPAR_HVSI
181 bool "LPAR HVSI Console"
182 depends on PPC_PSERIES && HVC_CONSOLE
184 Select this to enable early debugging for a machine with a HVSI
185 console on a specified vterm.
187 config PPC_EARLY_DEBUG_G5
189 depends on PPC_PMAC64
191 Select this to enable early debugging for Apple G5 machines.
193 config PPC_EARLY_DEBUG_RTAS_PANEL
197 Select this to enable early debugging via the RTAS panel.
199 config PPC_EARLY_DEBUG_RTAS_CONSOLE
202 select UDBG_RTAS_CONSOLE
204 Select this to enable early debugging via the RTAS console.
206 config PPC_EARLY_DEBUG_MAPLE
207 bool "Maple real mode"
210 Select this to enable early debugging for Maple.
212 config PPC_EARLY_DEBUG_PAS_REALMODE
213 bool "PA Semi real mode"
214 depends on PPC_PASEMI
216 Select this to enable early debugging for PA Semi.
217 Output will be on UART0.
219 config PPC_EARLY_DEBUG_44x
220 bool "Early serial debugging for IBM/AMCC 44x CPUs"
223 Select this to enable early debugging for IBM 44x chips via the
224 inbuilt serial port. If you enable this, ensure you set
225 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
227 config PPC_EARLY_DEBUG_40x
228 bool "Early serial debugging for IBM/AMCC 40x CPUs"
231 Select this to enable early debugging for IBM 40x chips via the
232 inbuilt serial port. This works on chips with a 16550 compatible
233 UART. Xilinx chips with uartlite cannot use this option.
235 config PPC_EARLY_DEBUG_CPM
236 bool "Early serial debugging for Freescale CPM-based serial ports"
237 depends on SERIAL_CPM
239 Select this to enable early debugging for Freescale chips
240 using a CPM-based serial port. This assumes that the bootwrapper
241 has run, and set up the CPM in a particular way.
243 config PPC_EARLY_DEBUG_USBGECKO
244 bool "Early debugging through the USB Gecko adapter"
245 depends on GAMECUBE_COMMON
248 Select this to enable early debugging for Nintendo GameCube/Wii
249 consoles via an external USB Gecko adapter.
251 config PPC_EARLY_DEBUG_PS3GELIC
252 bool "Early debugging through the PS3 Ethernet port"
256 Select this to enable early debugging for the PlayStation3 via
257 UDP broadcasts sent out through the Ethernet port.
259 config PPC_EARLY_DEBUG_OPAL_RAW
260 bool "OPAL raw console"
263 Select this to enable early debugging for the PowerNV platform
264 using a "raw" console
266 config PPC_EARLY_DEBUG_OPAL_HVSI
267 bool "OPAL hvsi console"
270 Select this to enable early debugging for the PowerNV platform
271 using an "hvsi" console
273 config PPC_EARLY_DEBUG_MEMCONS
274 bool "In memory console"
276 Select this to enable early debugging using an in memory console.
277 This console provides input and output buffers stored within the
278 kernel BSS and should be safe to select on any system. A debugger
279 can then be used to read kernel output or send input to the console.
282 config PPC_MEMCONS_OUTPUT_SIZE
283 int "In memory console output buffer size"
284 depends on PPC_EARLY_DEBUG_MEMCONS
287 Selects the size of the output buffer (in bytes) of the in memory
290 config PPC_MEMCONS_INPUT_SIZE
291 int "In memory console input buffer size"
292 depends on PPC_EARLY_DEBUG_MEMCONS
295 Selects the size of the input buffer (in bytes) of the in memory
298 config PPC_EARLY_DEBUG_OPAL
300 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
303 config PPC_EARLY_DEBUG_HVSI_VTERMNO
304 hex "vterm number to use with early debug HVSI"
305 depends on PPC_EARLY_DEBUG_LPAR_HVSI
308 You probably want 0x30000000 for your first serial port and
309 0x30000001 for your second one
311 config PPC_EARLY_DEBUG_OPAL_VTERMNO
312 hex "vterm number to use with OPAL early debug"
313 depends on PPC_EARLY_DEBUG_OPAL
316 This correspond to which /dev/hvcN you want to use for early
319 On OPAL v2, this will be 0 for network console and 1 or 2 for
320 the machine built-in serial ports.
322 config PPC_EARLY_DEBUG_44x_PHYSLOW
323 hex "Low 32 bits of early debug UART physical address"
324 depends on PPC_EARLY_DEBUG_44x
327 You probably want 0x40000200 for ebony boards and
328 0x40000300 for taishan
330 config PPC_EARLY_DEBUG_44x_PHYSHIGH
331 hex "EPRN of early debug UART physical address"
332 depends on PPC_EARLY_DEBUG_44x
335 config PPC_EARLY_DEBUG_40x_PHYSADDR
336 hex "Early debug UART physical address"
337 depends on PPC_EARLY_DEBUG_40x
340 config PPC_EARLY_DEBUG_CPM_ADDR
341 hex "CPM UART early debug transmit descriptor address"
342 depends on PPC_EARLY_DEBUG_CPM
343 default "0xfa202008" if PPC_EP88XC
344 default "0xf0001ff8" if CPM2
345 default "0xff002008" if CPM1
347 This specifies the address of the transmit descriptor
348 used for early debug output. Because it is needed before
349 platform probing is done, all platforms selected must
350 share the same address.
353 bool "Fault-injection capability for IOMMU"
354 depends on FAULT_INJECTION
356 Provide fault-injection capability for IOMMU. Each device can
357 be selectively enabled via the fail_iommu property.
359 If you are unsure, say N.
362 bool "Export kernel pagetable layout to userspace via debugfs"
363 depends on DEBUG_KERNEL && DEBUG_FS
365 This option exports the state of the kernel pagetables to a
366 debugfs file. This is only useful for kernel developers who are
367 working in architecture specific areas of the kernel - probably
368 not a good idea to enable this feature in a production kernel.
370 If you are unsure, say N.
373 bool "Warn on W+X mappings at boot"
374 depends on PPC_PTDUMP
376 Generate a warning if any W+X mappings are found at boot.
378 This is useful for discovering cases where the kernel is leaving
379 W+X mappings after applying NX, as such mappings are a security risk.
381 Note that even if the check fails, your kernel is possibly
382 still fine, as W+X mappings are not a security hole in
383 themselves, what they do is that they make the exploitation
384 of other unfixed kernel bugs easier.
386 There is no runtime or memory usage effect of this option
387 once the kernel has booted up - it's a one time check.
389 If in doubt, say "Y".
391 config PPC_FAST_ENDIAN_SWITCH
392 bool "Deprecated fast endian-switch syscall"
393 depends on DEBUG_KERNEL && PPC_BOOK3S_64
395 If you're unsure what this is, say N.
397 config KASAN_SHADOW_OFFSET