Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1# SPDX-License-Identifier: GPL-2.0
2
3config PPC_DISABLE_WERROR
4 bool "Don't build arch/powerpc code with -Werror"
5 help
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).
9
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
12 inclined to fix it.
13
14config PPC_WERROR
15 bool
16 depends on !PPC_DISABLE_WERROR
17 default y
18
19config PRINT_STACK_DEPTH
20 int "Stack depth to print" if DEBUG_KERNEL
21 default 64
22 help
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.
27
28config HCALL_STATS
29 bool "Hypervisor call instrumentation"
30 depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
31 help
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.
38
39 This option will add a small amount of overhead to all hypervisor
40 calls.
41
42config PPC_EMULATED_STATS
43 bool "Emulated instructions tracking"
44 depends on DEBUG_FS
45 help
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
53 emulated.
54
55config CODE_PATCHING_SELFTEST
56 bool "Run self-tests of the code-patching code"
57 depends on DEBUG_KERNEL
58
59config JUMP_LABEL_FEATURE_CHECKS
60 bool "Enable use of jump label for cpu/mmu_has_feature()"
61 depends on JUMP_LABEL
62 default y
63 help
64 Selecting this options enables use of jump labels for some internal
65 feature checks. This should generate more optimal code for those
66 checks.
67
68config JUMP_LABEL_FEATURE_CHECK_DEBUG
69 bool "Do extra check on feature fixup calls"
70 depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
71 help
72 This tries to catch incorrect usage of cpu_has_feature() and
73 mmu_has_feature() in the code.
74
75 If you don't know what this means, say N.
76
77config FTR_FIXUP_SELFTEST
78 bool "Run self-tests of the feature-fixup code"
79 depends on DEBUG_KERNEL
80
81config MSI_BITMAP_SELFTEST
82 bool "Run self-tests of the MSI bitmap code"
83 depends on DEBUG_KERNEL
84
85config GUEST_STATE_BUFFER_TEST
86 def_tristate n
87 prompt "Enable Guest State Buffer unit tests"
88 depends on KUNIT
89 depends on KVM_BOOK3S_HV_POSSIBLE
90 default KUNIT_ALL_TESTS
91 help
92 The Guest State Buffer is a data format specified in the PAPR.
93 It is by hcalls to communicate the state of L2 guests between
94 the L1 and L0 hypervisors. Enable unit tests for the library
95 used to create and use guest state buffers.
96
97config PPC_IRQ_SOFT_MASK_DEBUG
98 bool "Include extra checks for powerpc irq soft masking"
99 depends on PPC64
100
101config PPC_RFI_SRR_DEBUG
102 bool "Include extra checks for RFI SRR register validity"
103 depends on PPC_BOOK3S_64
104
105config XMON
106 bool "Include xmon kernel debugger"
107 depends on DEBUG_KERNEL
108 select CONSOLE_POLL if SERIAL_CPM_CONSOLE
109 help
110 Include in-kernel hooks for the xmon kernel monitor/debugger.
111 Unless you are intending to debug the kernel, say N here.
112 Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
113 nothing will appear on the screen (xmon writes directly to the
114 framebuffer memory).
115 The cmdline option 'xmon' or 'xmon=early' will drop into xmon
116 very early during boot. 'xmon=on' will just enable the xmon
117 debugger hooks. 'xmon=off' will disable the debugger hooks
118 if CONFIG_XMON_DEFAULT is set.
119 xmon will print a backtrace on the very first invocation.
120 'xmon=nobt' will disable this autobacktrace.
121
122config XMON_DEFAULT
123 bool "Enable xmon by default"
124 depends on XMON
125 help
126 xmon is normally disabled unless booted with 'xmon=on'.
127 Use 'xmon=off' to disable xmon init during runtime.
128
129config XMON_DISASSEMBLY
130 bool "Include disassembly support in xmon"
131 depends on XMON
132 default y
133 help
134 Include support for disassembling in xmon. You probably want
135 to say Y here, unless you're building for a memory-constrained
136 system.
137
138config XMON_DEFAULT_RO_MODE
139 bool "Restrict xmon to read-only operations by default"
140 depends on XMON
141 default y
142 help
143 Operate xmon in read-only mode. The cmdline options 'xmon=rw' and
144 'xmon=ro' override this default.
145
146config DEBUGGER
147 bool
148 depends on KGDB || XMON
149 default y
150
151config BDI_SWITCH
152 bool "Include BDI-2000 user context switcher"
153 depends on DEBUG_KERNEL && PPC32
154 help
155 Include in-kernel support for the Abatron BDI2000 debugger.
156 Unless you are intending to debug the kernel with one of these
157 machines, say N here.
158
159config BOOTX_TEXT
160 bool "Support for early boot text console (BootX or OpenFirmware only)"
161 depends on PPC_BOOK3S
162 select FONT_SUN8x16
163 select FONT_SUPPORT
164 help
165 Say Y here to see progress messages from the boot firmware in text
166 mode. Requires either BootX or Open Firmware.
167
168config PPC_EARLY_DEBUG
169 bool "Early debugging (dangerous)"
170 help
171 Say Y to enable some early debugging facilities that may be available
172 for your processor/board combination. Those facilities are hacks
173 intended to debug problems early during boot, this should not be
174 enabled in a production kernel.
175 Note that enabling this will also cause the kernel default log level
176 to be pushed to max automatically very early during boot
177
178choice
179 prompt "Early debugging console"
180 depends on PPC_EARLY_DEBUG
181 help
182 Use the selected console for early debugging. Careful, if you
183 enable debugging for the wrong type of machine your kernel
184 _will not boot_.
185
186config PPC_EARLY_DEBUG_BOOTX
187 bool "BootX or OpenFirmware"
188 depends on BOOTX_TEXT
189 help
190 Select this to enable early debugging for a machine using BootX
191 or OpenFirmware.
192
193config PPC_EARLY_DEBUG_LPAR
194 bool "LPAR HV Console"
195 depends on PPC_PSERIES && HVC_CONSOLE
196 help
197 Select this to enable early debugging for a machine with a HVC
198 console on vterm 0.
199
200config PPC_EARLY_DEBUG_LPAR_HVSI
201 bool "LPAR HVSI Console"
202 depends on PPC_PSERIES && HVC_CONSOLE
203 help
204 Select this to enable early debugging for a machine with a HVSI
205 console on a specified vterm.
206
207config PPC_EARLY_DEBUG_G5
208 bool "Apple G5"
209 depends on PPC_PMAC64
210 help
211 Select this to enable early debugging for Apple G5 machines.
212
213config PPC_EARLY_DEBUG_RTAS_PANEL
214 bool "RTAS Panel"
215 depends on PPC_RTAS
216 help
217 Select this to enable early debugging via the RTAS panel.
218
219config PPC_EARLY_DEBUG_RTAS_CONSOLE
220 bool "RTAS Console"
221 depends on PPC_RTAS
222 select UDBG_RTAS_CONSOLE
223 help
224 Select this to enable early debugging via the RTAS console.
225
226config PPC_EARLY_DEBUG_MAPLE
227 bool "Maple real mode"
228 depends on PPC_MAPLE
229 help
230 Select this to enable early debugging for Maple.
231
232config PPC_EARLY_DEBUG_PAS_REALMODE
233 bool "PA Semi real mode"
234 depends on PPC_PASEMI
235 help
236 Select this to enable early debugging for PA Semi.
237 Output will be on UART0.
238
239config PPC_EARLY_DEBUG_44x
240 bool "Early serial debugging for IBM/AMCC 44x CPUs"
241 depends on 44x
242 help
243 Select this to enable early debugging for IBM 44x chips via the
244 inbuilt serial port. If you enable this, ensure you set
245 PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
246
247config PPC_EARLY_DEBUG_40x
248 bool "Early serial debugging for IBM/AMCC 40x CPUs"
249 depends on 40x
250 help
251 Select this to enable early debugging for IBM 40x chips via the
252 inbuilt serial port. This works on chips with a 16550 compatible
253 UART.
254
255config PPC_EARLY_DEBUG_CPM
256 bool "Early serial debugging for Freescale CPM-based serial ports"
257 depends on SERIAL_CPM=y
258 help
259 Select this to enable early debugging for Freescale chips
260 using a CPM-based serial port. This assumes that the bootwrapper
261 has run, and set up the CPM in a particular way.
262
263config PPC_EARLY_DEBUG_USBGECKO
264 bool "Early debugging through the USB Gecko adapter"
265 depends on GAMECUBE_COMMON
266 select USBGECKO_UDBG
267 help
268 Select this to enable early debugging for Nintendo GameCube/Wii
269 consoles via an external USB Gecko adapter.
270
271config PPC_EARLY_DEBUG_PS3GELIC
272 bool "Early debugging through the PS3 Ethernet port"
273 depends on PPC_PS3
274 select PS3GELIC_UDBG
275 help
276 Select this to enable early debugging for the PlayStation3 via
277 UDP broadcasts sent out through the Ethernet port.
278
279config PPC_EARLY_DEBUG_OPAL_RAW
280 bool "OPAL raw console"
281 depends on HVC_OPAL
282 help
283 Select this to enable early debugging for the PowerNV platform
284 using a "raw" console
285
286config PPC_EARLY_DEBUG_OPAL_HVSI
287 bool "OPAL hvsi console"
288 depends on HVC_OPAL
289 help
290 Select this to enable early debugging for the PowerNV platform
291 using an "hvsi" console
292
293config PPC_EARLY_DEBUG_MEMCONS
294 bool "In memory console"
295 help
296 Select this to enable early debugging using an in memory console.
297 This console provides input and output buffers stored within the
298 kernel BSS and should be safe to select on any system. A debugger
299 can then be used to read kernel output or send input to the console.
300
301config PPC_EARLY_DEBUG_16550
302 bool "Serial 16550"
303 depends on PPC_UDBG_16550
304 help
305 Select this to enable early debugging via Serial 16550 console
306endchoice
307
308config PPC_MEMCONS_OUTPUT_SIZE
309 int "In memory console output buffer size"
310 depends on PPC_EARLY_DEBUG_MEMCONS
311 default 4096
312 help
313 Selects the size of the output buffer (in bytes) of the in memory
314 console.
315
316config PPC_MEMCONS_INPUT_SIZE
317 int "In memory console input buffer size"
318 depends on PPC_EARLY_DEBUG_MEMCONS
319 default 128
320 help
321 Selects the size of the input buffer (in bytes) of the in memory
322 console.
323
324config PPC_EARLY_DEBUG_OPAL
325 def_bool y
326 depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
327
328config PPC_EARLY_DEBUG_HVSI_VTERMNO
329 hex "vterm number to use with early debug HVSI"
330 depends on PPC_EARLY_DEBUG_LPAR_HVSI
331 default "0x30000000"
332 help
333 You probably want 0x30000000 for your first serial port and
334 0x30000001 for your second one
335
336config PPC_EARLY_DEBUG_OPAL_VTERMNO
337 hex "vterm number to use with OPAL early debug"
338 depends on PPC_EARLY_DEBUG_OPAL
339 default "0"
340 help
341 This correspond to which /dev/hvcN you want to use for early
342 debug.
343
344 On OPAL v2, this will be 0 for network console and 1 or 2 for
345 the machine built-in serial ports.
346
347config PPC_EARLY_DEBUG_44x_PHYSLOW
348 hex "Low 32 bits of early debug UART physical address"
349 depends on PPC_EARLY_DEBUG_44x
350 default "0x40000200"
351 help
352 You probably want 0x40000200 for ebony boards and
353 0x40000300 for taishan
354
355config PPC_EARLY_DEBUG_44x_PHYSHIGH
356 hex "EPRN of early debug UART physical address"
357 depends on PPC_EARLY_DEBUG_44x
358 default "0x1"
359
360config PPC_EARLY_DEBUG_40x_PHYSADDR
361 hex "Early debug UART physical address"
362 depends on PPC_EARLY_DEBUG_40x
363 default "0xef600300"
364
365config PPC_EARLY_DEBUG_CPM_ADDR
366 hex "CPM UART early debug transmit descriptor address"
367 depends on PPC_EARLY_DEBUG_CPM
368 default "0xfa202008" if PPC_EP88XC
369 default "0xf0001ff8" if CPM2
370 default "0xff002008" if CPM1
371 help
372 This specifies the address of the transmit descriptor
373 used for early debug output. Because it is needed before
374 platform probing is done, all platforms selected must
375 share the same address.
376
377config PPC_EARLY_DEBUG_16550_PHYSADDR
378 hex "Early debug Serial 16550 physical address"
379 depends on PPC_EARLY_DEBUG_16550
380
381config PPC_EARLY_DEBUG_16550_STRIDE
382 int "Early debug Serial 16550 stride"
383 depends on PPC_EARLY_DEBUG_16550
384 default 1
385
386config FAIL_IOMMU
387 bool "Fault-injection capability for IOMMU"
388 depends on FAULT_INJECTION
389 depends on PCI || IBMVIO
390 help
391 Provide fault-injection capability for IOMMU. Each device can
392 be selectively enabled via the fail_iommu property.
393
394 If you are unsure, say N.
395
396config PPC_FAST_ENDIAN_SWITCH
397 bool "Deprecated fast endian-switch syscall"
398 depends on DEBUG_KERNEL && PPC_BOOK3S_64
399 help
400 If you're unsure what this is, say N.
401
402config KASAN_SHADOW_OFFSET
403 hex
404 depends on KASAN
405 default 0xe0000000 if PPC32
406 default 0xa80e000000000000 if PPC_BOOK3S_64
407 default 0xa8001c0000000000 if PPC_BOOK3E_64