xref: /openbmc/linux/arch/powerpc/Kconfig (revision 22c03398)
1# SPDX-License-Identifier: GPL-2.0
2source "arch/powerpc/platforms/Kconfig.cputype"
3
4config 32BIT
5	bool
6	default y if PPC32
7
8config 64BIT
9	bool
10	default y if PPC64
11
12config MMU
13	bool
14	default y
15
16config ARCH_MMAP_RND_BITS_MAX
17	# On Book3S 64, the default virtual address space for 64-bit processes
18	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
19	# 32T of address space (2^45), which should ensure a reasonable gap
20	# between bottom-up and top-down allocations for applications that
21	# consume "normal" amounts of address space. Book3S 64 only supports 64K
22	# and 4K page sizes.
23	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
24	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
25	#
26	# On all other 64-bit platforms (currently only Book3E), the virtual
27	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
28	# of address space (2^44). Only 4K page sizes are supported.
29	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
30	#
31	# For 32-bit, use the compat values, as they're the same.
32	default ARCH_MMAP_RND_COMPAT_BITS_MAX
33
34config ARCH_MMAP_RND_BITS_MIN
35	# Allow randomisation to consume up to 1GB of address space (2^30).
36	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
37	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
38	#
39	# For 32-bit, use the compat values, as they're the same.
40	default ARCH_MMAP_RND_COMPAT_BITS_MIN
41
42config ARCH_MMAP_RND_COMPAT_BITS_MAX
43	# Total virtual address space for 32-bit processes is 2^31 (2GB).
44	# Allow randomisation to consume up to 512MB of address space (2^29).
45	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
46	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)
47	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)
48	default 17			# 17 = 29 (512MB) - 12 (4K)
49
50config ARCH_MMAP_RND_COMPAT_BITS_MIN
51	# Total virtual address space for 32-bit processes is 2^31 (2GB).
52	# Allow randomisation to consume up to 8MB of address space (2^23).
53	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
54	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
55	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
56	default 11			# 11 = 23 (8MB) - 12 (4K)
57
58config NR_IRQS
59	int "Number of virtual interrupt numbers"
60	range 32 1048576
61	default "512"
62	help
63	  This defines the number of virtual interrupt numbers the kernel
64	  can manage. Virtual interrupt numbers are what you see in
65	  /proc/interrupts. If you configure your system to have too few,
66	  drivers will fail to load or worse - handle with care.
67
68config NMI_IPI
69	bool
70	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
71	default y
72
73config PPC_WATCHDOG
74	bool
75	depends on HARDLOCKUP_DETECTOR
76	depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
77	default y
78	help
79	  This is a placeholder when the powerpc hardlockup detector
80	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
81	  selected via the generic lockup detector menu which is why we
82	  have no standalone config option for it here.
83
84config STACKTRACE_SUPPORT
85	bool
86	default y
87
88config LOCKDEP_SUPPORT
89	bool
90	default y
91
92config GENERIC_LOCKBREAK
93	bool
94	default y
95	depends on SMP && PREEMPTION
96
97config GENERIC_HWEIGHT
98	bool
99	default y
100
101config PPC
102	bool
103	default y
104	#
105	# Please keep this list sorted alphabetically.
106	#
107	select ARCH_32BIT_OFF_T if PPC32
108	select ARCH_ENABLE_MEMORY_HOTPLUG
109	select ARCH_ENABLE_MEMORY_HOTREMOVE
110	select ARCH_HAS_COPY_MC			if PPC64
111	select ARCH_HAS_DEBUG_VIRTUAL
112	select ARCH_HAS_DEBUG_VM_PGTABLE
113	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
114	select ARCH_HAS_DEVMEM_IS_ALLOWED
115	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
116	select ARCH_HAS_ELF_RANDOMIZE
117	select ARCH_HAS_FORTIFY_SOURCE
118	select ARCH_HAS_GCOV_PROFILE_ALL
119	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
120	select ARCH_HAS_KCOV
121	select ARCH_HAS_MEMBARRIER_CALLBACKS
122	select ARCH_HAS_MEMBARRIER_SYNC_CORE
123	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN
124	select ARCH_HAS_MMIOWB			if PPC64
125	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
126	select ARCH_HAS_PHYS_TO_DMA
127	select ARCH_HAS_PMEM_API
128	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
129	select ARCH_HAS_PTE_SPECIAL
130	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
131	select ARCH_HAS_SET_MEMORY
132	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
133	select ARCH_HAS_STRICT_KERNEL_RWX	if FSL_BOOKE && !HIBERNATION && !RANDOMIZE_BASE
134	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32
135	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
136	select ARCH_HAS_UACCESS_FLUSHCACHE
137	select ARCH_HAS_UBSAN_SANITIZE_ALL
138	select ARCH_HAVE_NMI_SAFE_CMPXCHG
139	select ARCH_KEEP_MEMBLOCK
140	select ARCH_MIGHT_HAVE_PC_PARPORT
141	select ARCH_MIGHT_HAVE_PC_SERIO
142	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
143	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
144	select ARCH_STACKWALK
145	select ARCH_SUPPORTS_ATOMIC_RMW
146	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
147	select ARCH_USE_BUILTIN_BSWAP
148	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
149	select ARCH_USE_MEMTEST
150	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
151	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS
152	select ARCH_WANT_IPC_PARSE_VERSION
153	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
154	select ARCH_WANT_LD_ORPHAN_WARN
155	select ARCH_WEAK_RELEASE_ACQUIRE
156	select BINFMT_ELF
157	select BUILDTIME_TABLE_SORT
158	select CLONE_BACKWARDS
159	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
160	select DMA_OPS_BYPASS			if PPC64
161	select DMA_OPS				if PPC64
162	select DYNAMIC_FTRACE			if FUNCTION_TRACER
163	select EDAC_ATOMIC_SCRUB
164	select EDAC_SUPPORT
165	select GENERIC_ATOMIC64			if PPC32
166	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
167	select GENERIC_CMOS_UPDATE
168	select GENERIC_CPU_AUTOPROBE
169	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
170	select GENERIC_EARLY_IOREMAP
171	select GENERIC_GETTIMEOFDAY
172	select GENERIC_IRQ_SHOW
173	select GENERIC_IRQ_SHOW_LEVEL
174	select GENERIC_PCI_IOMAP		if PCI
175	select GENERIC_PTDUMP
176	select GENERIC_SMP_IDLE_THREAD
177	select GENERIC_TIME_VSYSCALL
178	select GENERIC_VDSO_TIME_NS
179	select HAVE_ARCH_AUDITSYSCALL
180	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
181	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
182	select HAVE_ARCH_JUMP_LABEL
183	select HAVE_ARCH_JUMP_LABEL_RELATIVE
184	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
185	select HAVE_ARCH_KASAN_VMALLOC		if PPC32 && PPC_PAGE_SHIFT <= 14
186	select HAVE_ARCH_KFENCE			if PPC_BOOK3S_32 || PPC_8xx || 40x
187	select HAVE_ARCH_KGDB
188	select HAVE_ARCH_MMAP_RND_BITS
189	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
190	select HAVE_ARCH_NVRAM_OPS
191	select HAVE_ARCH_SECCOMP_FILTER
192	select HAVE_ARCH_TRACEHOOK
193	select HAVE_ASM_MODVERSIONS
194	select HAVE_CONTEXT_TRACKING		if PPC64
195	select HAVE_C_RECORDMCOUNT
196	select HAVE_DEBUG_KMEMLEAK
197	select HAVE_DEBUG_STACKOVERFLOW
198	select HAVE_DYNAMIC_FTRACE
199	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if MPROFILE_KERNEL
200	select HAVE_EBPF_JIT
201	select HAVE_EFFICIENT_UNALIGNED_ACCESS	if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
202	select HAVE_FAST_GUP
203	select HAVE_FTRACE_MCOUNT_RECORD
204	select HAVE_FUNCTION_ERROR_INJECTION
205	select HAVE_FUNCTION_GRAPH_TRACER
206	select HAVE_FUNCTION_TRACER
207	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
208	select HAVE_GENERIC_VDSO
209	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
210	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
211	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
212	select HAVE_IOREMAP_PROT
213	select HAVE_IRQ_EXIT_ON_IRQ_STACK
214	select HAVE_IRQ_TIME_ACCOUNTING
215	select HAVE_KERNEL_GZIP
216	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
217	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
218	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
219	select HAVE_KPROBES
220	select HAVE_KPROBES_ON_FTRACE
221	select HAVE_KRETPROBES
222	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
223	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
224	select HAVE_MOD_ARCH_SPECIFIC
225	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
226	select HAVE_OPTPROBES
227	select HAVE_PERF_EVENTS
228	select HAVE_PERF_EVENTS_NMI		if PPC64
229	select HAVE_PERF_REGS
230	select HAVE_PERF_USER_STACK_DUMP
231	select HAVE_REGS_AND_STACK_ACCESS_API
232	select HAVE_RELIABLE_STACKTRACE
233	select HAVE_RSEQ
234	select HAVE_SETUP_PER_CPU_AREA		if PPC64
235	select HAVE_SOFTIRQ_ON_OWN_STACK
236	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
237	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
238	select HAVE_STATIC_CALL			if PPC32
239	select HAVE_SYSCALL_TRACEPOINTS
240	select HAVE_VIRT_CPU_ACCOUNTING
241	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
242	select IOMMU_HELPER			if PPC64
243	select IRQ_DOMAIN
244	select IRQ_FORCED_THREADING
245	select MMU_GATHER_PAGE_SIZE
246	select MMU_GATHER_RCU_TABLE_FREE
247	select MODULES_USE_ELF_RELA
248	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
249	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
250	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
251	select NEED_SG_DMA_LENGTH
252	select OF
253	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE
254	select OF_EARLY_FLATTREE
255	select OLD_SIGACTION			if PPC32
256	select OLD_SIGSUSPEND
257	select PCI_DOMAINS			if PCI
258	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
259	select PCI_SYSCALL			if PCI
260	select PPC_DAWR				if PPC64
261	select RTC_LIB
262	select SPARSE_IRQ
263	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
264	select SYSCTL_EXCEPTION_TRACE
265	select THREAD_INFO_IN_TASK
266	select TRACE_IRQFLAGS_SUPPORT
267	select VIRT_TO_BUS			if !PPC64
268	#
269	# Please keep this list sorted alphabetically.
270	#
271
272config PPC_BARRIER_NOSPEC
273	bool
274	default y
275	depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
276
277config EARLY_PRINTK
278	bool
279	default y
280
281config PANIC_TIMEOUT
282	int
283	default 180
284
285config COMPAT
286	bool "Enable support for 32bit binaries"
287	depends on PPC64
288	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
289	default y if !CPU_LITTLE_ENDIAN
290	select ARCH_WANT_OLD_COMPAT_IPC
291	select COMPAT_OLD_SIGACTION
292
293config SYSVIPC_COMPAT
294	bool
295	depends on COMPAT && SYSVIPC
296	default y
297
298config SCHED_OMIT_FRAME_POINTER
299	bool
300	default y
301
302config ARCH_MAY_HAVE_PC_FDC
303	bool
304	default PCI
305
306config PPC_UDBG_16550
307	bool
308
309config GENERIC_TBSYNC
310	bool
311	default y if PPC32 && SMP
312
313config AUDIT_ARCH
314	bool
315	default y
316
317config GENERIC_BUG
318	bool
319	default y
320	depends on BUG
321
322config GENERIC_BUG_RELATIVE_POINTERS
323	def_bool y
324	depends on GENERIC_BUG
325
326config SYS_SUPPORTS_APM_EMULATION
327	default y if PMAC_APM_EMU
328	bool
329
330config EPAPR_BOOT
331	bool
332	help
333	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
334
335config DEFAULT_UIMAGE
336	bool
337	help
338	  Used to allow a board to specify it wants a uImage built by default
339
340config ARCH_HIBERNATION_POSSIBLE
341	bool
342	default y
343
344config ARCH_SUSPEND_POSSIBLE
345	def_bool y
346	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
347		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
348		   || 44x || 40x
349
350config ARCH_SUSPEND_NONZERO_CPU
351	def_bool y
352	depends on PPC_POWERNV || PPC_PSERIES
353
354config PPC_DCR_NATIVE
355	bool
356
357config PPC_DCR_MMIO
358	bool
359
360config PPC_DCR
361	bool
362	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
363	default y
364
365config PPC_OF_PLATFORM_PCI
366	bool
367	depends on PCI
368	depends on PPC64 # not supported on 32 bits yet
369
370config ARCH_SUPPORTS_UPROBES
371	def_bool y
372
373config PPC_ADV_DEBUG_REGS
374	bool
375	depends on 40x || BOOKE
376	default y
377
378config PPC_ADV_DEBUG_IACS
379	int
380	depends on PPC_ADV_DEBUG_REGS
381	default 4 if 44x
382	default 2
383
384config PPC_ADV_DEBUG_DACS
385	int
386	depends on PPC_ADV_DEBUG_REGS
387	default 2
388
389config PPC_ADV_DEBUG_DVCS
390	int
391	depends on PPC_ADV_DEBUG_REGS
392	default 2 if 44x
393	default 0
394
395config PPC_ADV_DEBUG_DAC_RANGE
396	bool
397	depends on PPC_ADV_DEBUG_REGS && 44x
398	default y
399
400config PPC_DAWR
401	bool
402
403config PGTABLE_LEVELS
404	int
405	default 2 if !PPC64
406	default 4
407
408source "arch/powerpc/sysdev/Kconfig"
409source "arch/powerpc/platforms/Kconfig"
410
411menu "Kernel options"
412
413config HIGHMEM
414	bool "High memory support"
415	depends on PPC32
416	select KMAP_LOCAL
417
418source "kernel/Kconfig.hz"
419
420config MATH_EMULATION
421	bool "Math emulation"
422	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
423	select PPC_FPU_REGS
424	help
425	  Some PowerPC chips designed for embedded applications do not have
426	  a floating-point unit and therefore do not implement the
427	  floating-point instructions in the PowerPC instruction set.  If you
428	  say Y here, the kernel will include code to emulate a floating-point
429	  unit, which will allow programs that use floating-point
430	  instructions to run.
431
432	  This is also useful to emulate missing (optional) instructions
433	  such as fsqrt on cores that do have an FPU but do not implement
434	  them (such as Freescale BookE).
435
436choice
437	prompt "Math emulation options"
438	default MATH_EMULATION_FULL
439	depends on MATH_EMULATION
440
441config	MATH_EMULATION_FULL
442	bool "Emulate all the floating point instructions"
443	help
444	  Select this option will enable the kernel to support to emulate
445	  all the floating point instructions. If your SoC doesn't have
446	  a FPU, you should select this.
447
448config MATH_EMULATION_HW_UNIMPLEMENTED
449	bool "Just emulate the FPU unimplemented instructions"
450	help
451	  Select this if you know there does have a hardware FPU on your
452	  SoC, but some floating point instructions are not implemented by that.
453
454endchoice
455
456config PPC_TRANSACTIONAL_MEM
457	bool "Transactional Memory support for POWERPC"
458	depends on PPC_BOOK3S_64
459	depends on SMP
460	select ALTIVEC
461	select VSX
462	help
463	  Support user-mode Transactional Memory on POWERPC.
464
465config PPC_UV
466	bool "Ultravisor support"
467	depends on KVM_BOOK3S_HV_POSSIBLE
468	depends on DEVICE_PRIVATE
469	default n
470	help
471	  This option paravirtualizes the kernel to run in POWER platforms that
472	  supports the Protected Execution Facility (PEF). On such platforms,
473	  the ultravisor firmware runs at a privilege level above the
474	  hypervisor.
475
476	  If unsure, say "N".
477
478config LD_HEAD_STUB_CATCH
479	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
480	depends on PPC64
481	help
482	  Very large kernels can cause linker branch stubs to be generated by
483	  code in head_64.S, which moves the head text sections out of their
484	  specified location. This option can work around the problem.
485
486	  If unsure, say "N".
487
488config MPROFILE_KERNEL
489	depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER
490	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
491
492config HOTPLUG_CPU
493	bool "Support for enabling/disabling CPUs"
494	depends on SMP && (PPC_PSERIES || \
495		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
496	help
497	  Say Y here to be able to disable and re-enable individual
498	  CPUs at runtime on SMP machines.
499
500	  Say N if you are unsure.
501
502config PPC_QUEUED_SPINLOCKS
503	bool "Queued spinlocks" if EXPERT
504	depends on SMP
505	default PPC_BOOK3S_64
506	help
507	  Say Y here to use queued spinlocks which give better scalability and
508	  fairness on large SMP and NUMA systems without harming single threaded
509	  performance.
510
511config ARCH_CPU_PROBE_RELEASE
512	def_bool y
513	depends on HOTPLUG_CPU
514
515config PPC64_SUPPORTS_MEMORY_FAILURE
516	bool "Add support for memory hwpoison"
517	depends on PPC_BOOK3S_64
518	default "y" if PPC_POWERNV
519	select ARCH_SUPPORTS_MEMORY_FAILURE
520
521config KEXEC
522	bool "kexec system call"
523	depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
524	select KEXEC_CORE
525	help
526	  kexec is a system call that implements the ability to shutdown your
527	  current kernel, and to start another kernel.  It is like a reboot
528	  but it is independent of the system firmware.   And like a reboot
529	  you can start any kernel with it, not just Linux.
530
531	  The name comes from the similarity to the exec system call.
532
533	  It is an ongoing process to be certain the hardware in a machine
534	  is properly shutdown, so do not be surprised if this code does not
535	  initially work for you.  As of this writing the exact hardware
536	  interface is strongly in flux, so no good recommendation can be
537	  made.
538
539config KEXEC_FILE
540	bool "kexec file based system call"
541	select KEXEC_CORE
542	select HAVE_IMA_KEXEC if IMA
543	select BUILD_BIN2C
544	select KEXEC_ELF
545	depends on PPC64
546	depends on CRYPTO=y
547	depends on CRYPTO_SHA256=y
548	help
549	  This is a new version of the kexec system call. This call is
550	  file based and takes in file descriptors as system call arguments
551	  for kernel and initramfs as opposed to a list of segments as is the
552	  case for the older kexec call.
553
554config ARCH_HAS_KEXEC_PURGATORY
555	def_bool KEXEC_FILE
556
557config RELOCATABLE
558	bool "Build a relocatable kernel"
559	depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
560	select NONSTATIC_KERNEL
561	select MODULE_REL_CRCS if MODVERSIONS
562	help
563	  This builds a kernel image that is capable of running at the
564	  location the kernel is loaded at. For ppc32, there is no any
565	  alignment restrictions, and this feature is a superset of
566	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
567	  16k-aligned base address. The kernel is linked as a
568	  position-independent executable (PIE) and contains dynamic relocations
569	  which are processed early in the bootup process.
570
571	  One use is for the kexec on panic case where the recovery kernel
572	  must live at a different physical address than the primary
573	  kernel.
574
575	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
576	  it has been loaded at and the compile time physical addresses
577	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
578	  setting can still be useful to bootwrappers that need to know the
579	  load address of the kernel (eg. u-boot/mkimage).
580
581config RANDOMIZE_BASE
582	bool "Randomize the address of the kernel image"
583	depends on (FSL_BOOKE && FLATMEM && PPC32)
584	depends on RELOCATABLE
585	help
586	  Randomizes the virtual address at which the kernel image is
587	  loaded, as a security feature that deters exploit attempts
588	  relying on knowledge of the location of kernel internals.
589
590	  If unsure, say Y.
591
592config RELOCATABLE_TEST
593	bool "Test relocatable kernel"
594	depends on (PPC64 && RELOCATABLE)
595	help
596	  This runs the relocatable kernel at the address it was initially
597	  loaded at, which tends to be non-zero and therefore test the
598	  relocation code.
599
600config CRASH_DUMP
601	bool "Build a dump capture kernel"
602	depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)
603	select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
604	help
605	  Build a kernel suitable for use as a dump capture kernel.
606	  The same kernel binary can be used as production kernel and dump
607	  capture kernel.
608
609config FA_DUMP
610	bool "Firmware-assisted dump"
611	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
612	select CRASH_CORE
613	select CRASH_DUMP
614	help
615	  A robust mechanism to get reliable kernel crash dump with
616	  assistance from firmware. This approach does not use kexec,
617	  instead firmware assists in booting the capture kernel
618	  while preserving memory contents. Firmware-assisted dump
619	  is meant to be a kdump replacement offering robustness and
620	  speed not possible without system firmware assistance.
621
622	  If unsure, say "y". Only special kernels like petitboot may
623	  need to say "N" here.
624
625config PRESERVE_FA_DUMP
626	bool "Preserve Firmware-assisted dump"
627	depends on PPC64 && PPC_POWERNV && !FA_DUMP
628	help
629	  On a kernel with FA_DUMP disabled, this option helps to preserve
630	  crash data from a previously crash'ed kernel. Useful when the next
631	  memory preserving kernel boot would process this crash data.
632	  Petitboot kernel is the typical usecase for this option.
633
634config OPAL_CORE
635	bool "Export OPAL memory as /sys/firmware/opal/core"
636	depends on PPC64 && PPC_POWERNV
637	help
638	  This option uses the MPIPL support in firmware to provide an
639	  ELF core of OPAL memory after a crash. The ELF core is exported
640	  as /sys/firmware/opal/core file which is helpful in debugging
641	  OPAL crashes using GDB.
642
643config IRQ_ALL_CPUS
644	bool "Distribute interrupts on all CPUs by default"
645	depends on SMP
646	help
647	  This option gives the kernel permission to distribute IRQs across
648	  multiple CPUs.  Saying N here will route all IRQs to the first
649	  CPU.  Generally saying Y is safe, although some problems have been
650	  reported with SMP Power Macintoshes with this option enabled.
651
652config NUMA
653	bool "NUMA Memory Allocation and Scheduler Support"
654	depends on PPC64 && SMP
655	default y if PPC_PSERIES || PPC_POWERNV
656	select USE_PERCPU_NUMA_NODE_ID
657	help
658	  Enable NUMA (Non-Uniform Memory Access) support.
659
660	  The kernel will try to allocate memory used by a CPU on the
661	  local memory controller of the CPU and add some more
662	  NUMA awareness to the kernel.
663
664config NODES_SHIFT
665	int
666	default "8" if PPC64
667	default "4"
668	depends on NUMA
669
670config HAVE_MEMORYLESS_NODES
671	def_bool y
672	depends on NUMA
673
674config ARCH_SELECT_MEMORY_MODEL
675	def_bool y
676	depends on PPC64
677
678config ARCH_FLATMEM_ENABLE
679	def_bool y
680	depends on (PPC64 && !NUMA) || PPC32
681
682config ARCH_SPARSEMEM_ENABLE
683	def_bool y
684	depends on PPC64
685	select SPARSEMEM_VMEMMAP_ENABLE
686
687config ARCH_SPARSEMEM_DEFAULT
688	def_bool y
689	depends on PPC_BOOK3S_64
690
691config ILLEGAL_POINTER_VALUE
692	hex
693	# This is roughly half way between the top of user space and the bottom
694	# of kernel space, which seems about as good as we can get.
695	default 0x5deadbeef0000000 if PPC64
696	default 0
697
698config ARCH_MEMORY_PROBE
699	def_bool y
700	depends on MEMORY_HOTPLUG
701
702choice
703	prompt "Page size"
704	default PPC_64K_PAGES if PPC_BOOK3S_64
705	default PPC_4K_PAGES
706	help
707	  Select the kernel logical page size. Increasing the page size
708	  will reduce software overhead at each page boundary, allow
709	  hardware prefetch mechanisms to be more effective, and allow
710	  larger dma transfers increasing IO efficiency and reducing
711	  overhead. However the utilization of memory will increase.
712	  For example, each cached file will using a multiple of the
713	  page size to hold its contents and the difference between the
714	  end of file and the end of page is wasted.
715
716	  Some dedicated systems, such as software raid serving with
717	  accelerated calculations, have shown significant increases.
718
719	  If you configure a 64 bit kernel for 64k pages but the
720	  processor does not support them, then the kernel will simulate
721	  them with 4k pages, loading them on demand, but with the
722	  reduced software overhead and larger internal fragmentation.
723	  For the 32 bit kernel, a large page option will not be offered
724	  unless it is supported by the configured processor.
725
726	  If unsure, choose 4K_PAGES.
727
728config PPC_4K_PAGES
729	bool "4k page size"
730	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
731
732config PPC_16K_PAGES
733	bool "16k page size"
734	depends on 44x || PPC_8xx
735
736config PPC_64K_PAGES
737	bool "64k page size"
738	depends on 44x || PPC_BOOK3S_64
739	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
740
741config PPC_256K_PAGES
742	bool "256k page size (Requires non-standard binutils settings)"
743	depends on 44x && !PPC_47x
744	help
745	  Make the page size 256k.
746
747	  The kernel will only be able to run applications that have been
748	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
749	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
750	  definition from 0x10000 to 0x40000 in older versions.
751
752endchoice
753
754config PPC_PAGE_SHIFT
755	int
756	default 18 if PPC_256K_PAGES
757	default 16 if PPC_64K_PAGES
758	default 14 if PPC_16K_PAGES
759	default 12
760
761config THREAD_SHIFT
762	int "Thread shift" if EXPERT
763	range 13 15
764	default "15" if PPC_256K_PAGES
765	default "14" if PPC64
766	default "14" if KASAN
767	default "13"
768	help
769	  Used to define the stack size. The default is almost always what you
770	  want. Only change this if you know what you are doing.
771
772config DATA_SHIFT_BOOL
773	bool "Set custom data alignment"
774	depends on ADVANCED_OPTIONS
775	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
776	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
777		   FSL_BOOKE
778	help
779	  This option allows you to set the kernel data alignment. When
780	  RAM is mapped by blocks, the alignment needs to fit the size and
781	  number of possible blocks. The default should be OK for most configs.
782
783	  Say N here unless you know what you are doing.
784
785config DATA_SHIFT
786	int "Data shift" if DATA_SHIFT_BOOL
787	default 24 if STRICT_KERNEL_RWX && PPC64
788	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
789	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
790	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_FSL_BOOKE
791	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
792	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
793	default 23 if STRICT_KERNEL_RWX && PPC_8xx
794	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
795	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
796	default 24 if STRICT_KERNEL_RWX && FSL_BOOKE
797	default PPC_PAGE_SHIFT
798	help
799	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
800	  Smaller is the alignment, greater is the number of necessary DBATs.
801
802	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
803	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
804	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
805	  8M pages will be pinned.
806
807config FORCE_MAX_ZONEORDER
808	int "Maximum zone order"
809	range 8 9 if PPC64 && PPC_64K_PAGES
810	default "9" if PPC64 && PPC_64K_PAGES
811	range 13 13 if PPC64 && !PPC_64K_PAGES
812	default "13" if PPC64 && !PPC_64K_PAGES
813	range 9 64 if PPC32 && PPC_16K_PAGES
814	default "9" if PPC32 && PPC_16K_PAGES
815	range 7 64 if PPC32 && PPC_64K_PAGES
816	default "7" if PPC32 && PPC_64K_PAGES
817	range 5 64 if PPC32 && PPC_256K_PAGES
818	default "5" if PPC32 && PPC_256K_PAGES
819	range 11 64
820	default "11"
821	help
822	  The kernel memory allocator divides physically contiguous memory
823	  blocks into "zones", where each zone is a power of two number of
824	  pages.  This option selects the largest power of two that the kernel
825	  keeps in the memory allocator.  If you need to allocate very large
826	  blocks of physically contiguous memory, then you may need to
827	  increase this value.
828
829	  This config option is actually maximum order plus one. For example,
830	  a value of 11 means that the largest free memory block is 2^10 pages.
831
832	  The page size is not necessarily 4KB.  For example, on 64-bit
833	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
834	  this in mind when choosing a value for this option.
835
836config PPC_SUBPAGE_PROT
837	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
838	default n
839	depends on PPC_BOOK3S_64 && PPC_64K_PAGES
840	help
841	  This option adds support for system call to allow user programs
842	  to set access permissions (read/write, readonly, or no access)
843	  on the 4k subpages of each 64k page.
844
845	  If unsure, say N here.
846
847config PPC_PROT_SAO_LPAR
848	bool "Support PROT_SAO mappings in LPARs"
849	depends on PPC_BOOK3S_64
850	help
851	  This option adds support for PROT_SAO mappings from userspace
852	  inside LPARs on supported CPUs.
853
854	  This may cause issues when performing guest migration from
855	  a CPU that supports SAO to one that does not.
856
857	  If unsure, say N here.
858
859config PPC_COPRO_BASE
860	bool
861
862config SCHED_SMT
863	bool "SMT (Hyperthreading) scheduler support"
864	depends on PPC64 && SMP
865	help
866	  SMT scheduler support improves the CPU scheduler's decision making
867	  when dealing with POWER5 cpus at a cost of slightly increased
868	  overhead in some places. If unsure say N here.
869
870config PPC_DENORMALISATION
871	bool "PowerPC denormalisation exception handling"
872	depends on PPC_BOOK3S_64
873	default "y" if PPC_POWERNV
874	help
875	  Add support for handling denormalisation of single precision
876	  values.  Useful for bare metal only.  If unsure say Y here.
877
878config CMDLINE
879	string "Initial kernel command string"
880	default ""
881	help
882	  On some platforms, there is currently no way for the boot loader to
883	  pass arguments to the kernel. For these platforms, you can supply
884	  some command-line options at build time by entering them here.  In
885	  most cases you will need to specify the root device here.
886
887choice
888	prompt "Kernel command line type" if CMDLINE != ""
889	default CMDLINE_FROM_BOOTLOADER
890
891config CMDLINE_FROM_BOOTLOADER
892	bool "Use bootloader kernel arguments if available"
893	help
894	  Uses the command-line options passed by the boot loader. If
895	  the boot loader doesn't provide any, the default kernel command
896	  string provided in CMDLINE will be used.
897
898config CMDLINE_EXTEND
899	bool "Extend bootloader kernel arguments"
900	help
901	  The command-line arguments provided by the boot loader will be
902	  appended to the default kernel command string.
903
904config CMDLINE_FORCE
905	bool "Always use the default kernel command string"
906	help
907	  Always use the default kernel command string, even if the boot
908	  loader passes other arguments to the kernel.
909	  This is useful if you cannot or don't want to change the
910	  command-line options your boot loader passes to the kernel.
911
912endchoice
913
914config EXTRA_TARGETS
915	string "Additional default image types"
916	help
917	  List additional targets to be built by the bootwrapper here (separated
918	  by spaces).  This is useful for targets that depend of device tree
919	  files in the .dts directory.
920
921	  Targets in this list will be build as part of the default build
922	  target, or when the user does a 'make zImage' or a
923	  'make zImage.initrd'.
924
925	  If unsure, leave blank
926
927config ARCH_WANTS_FREEZER_CONTROL
928	def_bool y
929	depends on ADB_PMU
930
931source "kernel/power/Kconfig"
932
933config PPC_MEM_KEYS
934	prompt "PowerPC Memory Protection Keys"
935	def_bool y
936	depends on PPC_BOOK3S_64
937	select ARCH_USES_HIGH_VMA_FLAGS
938	select ARCH_HAS_PKEYS
939	help
940	  Memory Protection Keys provides a mechanism for enforcing
941	  page-based protections, but without requiring modification of the
942	  page tables when an application changes protection domains.
943
944	  For details, see Documentation/core-api/protection-keys.rst
945
946	  If unsure, say y.
947
948config PPC_SECURE_BOOT
949	prompt "Enable secure boot support"
950	bool
951	depends on PPC_POWERNV || PPC_PSERIES
952	depends on IMA_ARCH_POLICY
953	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
954	help
955	  Systems with firmware secure boot enabled need to define security
956	  policies to extend secure boot to the OS. This config allows a user
957	  to enable OS secure boot on systems that have firmware support for
958	  it. If in doubt say N.
959
960config PPC_SECVAR_SYSFS
961	bool "Enable sysfs interface for POWER secure variables"
962	default y
963	depends on PPC_SECURE_BOOT
964	depends on SYSFS
965	help
966	  POWER secure variables are managed and controlled by firmware.
967	  These variables are exposed to userspace via sysfs to enable
968	  read/write operations on these variables. Say Y if you have
969	  secure boot enabled and want to expose variables to userspace.
970
971config PPC_RTAS_FILTER
972	bool "Enable filtering of RTAS syscalls"
973	default y
974	depends on PPC_RTAS
975	help
976	  The RTAS syscall API has security issues that could be used to
977	  compromise system integrity. This option enforces restrictions on the
978	  RTAS calls and arguments passed by userspace programs to mitigate
979	  these issues.
980
981	  Say Y unless you know what you are doing and the filter is causing
982	  problems for you.
983
984endmenu
985
986config ISA_DMA_API
987	bool
988	default PCI
989
990menu "Bus options"
991
992config ISA
993	bool "Support for ISA-bus hardware"
994	depends on PPC_CHRP
995	select PPC_I8259
996	help
997	  Find out whether you have ISA slots on your motherboard.  ISA is the
998	  name of a bus system, i.e. the way the CPU talks to the other stuff
999	  inside your box.  If you have an Apple machine, say N here; if you
1000	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1001	  embedded board, consult your board documentation.
1002
1003config GENERIC_ISA_DMA
1004	bool
1005	depends on ISA_DMA_API
1006	default y
1007
1008config PPC_INDIRECT_PCI
1009	bool
1010	depends on PCI
1011	default y if 40x || 44x
1012
1013config SBUS
1014	bool
1015
1016config FSL_SOC
1017	bool
1018
1019config FSL_PCI
1020	bool
1021	select ARCH_HAS_DMA_SET_MASK
1022	select PPC_INDIRECT_PCI
1023	select PCI_QUIRKS
1024
1025config FSL_PMC
1026	bool
1027	default y
1028	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1029	help
1030	  Freescale MPC85xx/MPC86xx power management controller support
1031	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1032
1033config PPC4xx_CPM
1034	bool
1035	default y
1036	depends on SUSPEND && (44x || 40x)
1037	help
1038	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1039	  It also enables support for two different idle states (idle-wait
1040	  and idle-doze).
1041
1042config 4xx_SOC
1043	bool
1044
1045config FSL_LBC
1046	bool "Freescale Local Bus support"
1047	help
1048	  Enables reporting of errors from the Freescale local bus
1049	  controller.  Also contains some common code used by
1050	  drivers for specific local bus peripherals.
1051
1052config FSL_GTM
1053	bool
1054	depends on PPC_83xx || QUICC_ENGINE || CPM2
1055	help
1056	  Freescale General-purpose Timers support
1057
1058config PCI_8260
1059	bool
1060	depends on PCI && 8260
1061	select PPC_INDIRECT_PCI
1062	default y
1063
1064config FSL_RIO
1065	bool "Freescale Embedded SRIO Controller support"
1066	depends on RAPIDIO = y && HAVE_RAPIDIO
1067	default "n"
1068	help
1069	  Include support for RapidIO controller on Freescale embedded
1070	  processors (MPC8548, MPC8641, etc).
1071
1072endmenu
1073
1074config NONSTATIC_KERNEL
1075	bool
1076
1077menu "Advanced setup"
1078	depends on PPC32
1079
1080config ADVANCED_OPTIONS
1081	bool "Prompt for advanced kernel configuration options"
1082	help
1083	  This option will enable prompting for a variety of advanced kernel
1084	  configuration options.  These options can cause the kernel to not
1085	  work if they are set incorrectly, but can be used to optimize certain
1086	  aspects of kernel memory management.
1087
1088	  Unless you know what you are doing, say N here.
1089
1090comment "Default settings for advanced configuration options are used"
1091	depends on !ADVANCED_OPTIONS
1092
1093config LOWMEM_SIZE_BOOL
1094	bool "Set maximum low memory"
1095	depends on ADVANCED_OPTIONS
1096	help
1097	  This option allows you to set the maximum amount of memory which
1098	  will be used as "low memory", that is, memory which the kernel can
1099	  access directly, without having to set up a kernel virtual mapping.
1100	  This can be useful in optimizing the layout of kernel virtual
1101	  memory.
1102
1103	  Say N here unless you know what you are doing.
1104
1105config LOWMEM_SIZE
1106	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1107	default "0x30000000"
1108
1109config LOWMEM_CAM_NUM_BOOL
1110	bool "Set number of CAMs to use to map low memory"
1111	depends on ADVANCED_OPTIONS && FSL_BOOKE
1112	help
1113	  This option allows you to set the maximum number of CAM slots that
1114	  will be used to map low memory.  There are a limited number of slots
1115	  available and even more limited number that will fit in the L1 MMU.
1116	  However, using more entries will allow mapping more low memory.  This
1117	  can be useful in optimizing the layout of kernel virtual memory.
1118
1119	  Say N here unless you know what you are doing.
1120
1121config LOWMEM_CAM_NUM
1122	depends on FSL_BOOKE
1123	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1124	default 3 if !STRICT_KERNEL_RWX
1125	default 9 if DATA_SHIFT >= 24
1126	default 12 if DATA_SHIFT >= 22
1127	default 15
1128
1129config DYNAMIC_MEMSTART
1130	bool "Enable page aligned dynamic load address for kernel"
1131	depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1132	select NONSTATIC_KERNEL
1133	help
1134	  This option enables the kernel to be loaded at any page aligned
1135	  physical address. The kernel creates a mapping from KERNELBASE to
1136	  the address where the kernel is loaded. The page size here implies
1137	  the TLB page size of the mapping for kernel on the particular platform.
1138	  Please refer to the init code for finding the TLB page size.
1139
1140	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1141	  kernel image, where the only restriction is the page aligned kernel
1142	  load address. When this option is enabled, the compile time physical
1143	  address CONFIG_PHYSICAL_START is ignored.
1144
1145	  This option is overridden by CONFIG_RELOCATABLE
1146
1147config PAGE_OFFSET_BOOL
1148	bool "Set custom page offset address"
1149	depends on ADVANCED_OPTIONS
1150	help
1151	  This option allows you to set the kernel virtual address at which
1152	  the kernel will map low memory.  This can be useful in optimizing
1153	  the virtual memory layout of the system.
1154
1155	  Say N here unless you know what you are doing.
1156
1157config PAGE_OFFSET
1158	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1159	default "0xc0000000"
1160
1161config KERNEL_START_BOOL
1162	bool "Set custom kernel base address"
1163	depends on ADVANCED_OPTIONS
1164	help
1165	  This option allows you to set the kernel virtual address at which
1166	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1167	  however there are times (like kdump) that one might not want them
1168	  to be the same.
1169
1170	  Say N here unless you know what you are doing.
1171
1172config KERNEL_START
1173	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1174	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1175	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1176	default "0xc0000000"
1177
1178config PHYSICAL_START_BOOL
1179	bool "Set physical address where the kernel is loaded"
1180	depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1181	help
1182	  This gives the physical address where the kernel is loaded.
1183
1184	  Say N here unless you know what you are doing.
1185
1186config PHYSICAL_START
1187	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1188	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1189	default "0x00000000"
1190
1191config PHYSICAL_ALIGN
1192	hex
1193	default "0x04000000" if FSL_BOOKE
1194	help
1195	  This value puts the alignment restrictions on physical address
1196	  where kernel is loaded and run from. Kernel is compiled for an
1197	  address which meets above alignment restriction.
1198
1199config TASK_SIZE_BOOL
1200	bool "Set custom user task size"
1201	depends on ADVANCED_OPTIONS
1202	help
1203	  This option allows you to set the amount of virtual address space
1204	  allocated to user tasks.  This can be useful in optimizing the
1205	  virtual memory layout of the system.
1206
1207	  Say N here unless you know what you are doing.
1208
1209config TASK_SIZE
1210	hex "Size of user task space" if TASK_SIZE_BOOL
1211	default "0x80000000" if PPC_8xx
1212	default "0xb0000000" if PPC_BOOK3S_32
1213	default "0xc0000000"
1214endmenu
1215
1216if PPC64
1217# This value must have zeroes in the bottom 60 bits otherwise lots will break
1218config PAGE_OFFSET
1219	hex
1220	default "0xc000000000000000"
1221config KERNEL_START
1222	hex
1223	default "0xc000000000000000"
1224config PHYSICAL_START
1225	hex
1226	default "0x00000000"
1227endif
1228
1229config	ARCH_RANDOM
1230	def_bool n
1231
1232config PPC_LIB_RHEAP
1233	bool
1234
1235source "arch/powerpc/kvm/Kconfig"
1236
1237source "kernel/livepatch/Kconfig"
1238