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 LIVEPATCH_64
13	def_bool PPC64
14	depends on LIVEPATCH
15
16config MMU
17	bool
18	default y
19
20config ARCH_MMAP_RND_BITS_MAX
21	# On Book3S 64, the default virtual address space for 64-bit processes
22	# is 2^47 (128TB). As a maximum, allow randomisation to consume up to
23	# 32T of address space (2^45), which should ensure a reasonable gap
24	# between bottom-up and top-down allocations for applications that
25	# consume "normal" amounts of address space. Book3S 64 only supports 64K
26	# and 4K page sizes.
27	default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
28	default 33 if PPC_BOOK3S_64		     # 33 = 45 (32T) - 12 (4K)
29	#
30	# On all other 64-bit platforms (currently only Book3E), the virtual
31	# address space is 2^46 (64TB). Allow randomisation to consume up to 16T
32	# of address space (2^44). Only 4K page sizes are supported.
33	default 32 if 64BIT	# 32 = 44 (16T) - 12 (4K)
34	#
35	# For 32-bit, use the compat values, as they're the same.
36	default ARCH_MMAP_RND_COMPAT_BITS_MAX
37
38config ARCH_MMAP_RND_BITS_MIN
39	# Allow randomisation to consume up to 1GB of address space (2^30).
40	default 14 if 64BIT && PPC_64K_PAGES	# 14 = 30 (1GB) - 16 (64K)
41	default 18 if 64BIT			# 18 = 30 (1GB) - 12 (4K)
42	#
43	# For 32-bit, use the compat values, as they're the same.
44	default ARCH_MMAP_RND_COMPAT_BITS_MIN
45
46config ARCH_MMAP_RND_COMPAT_BITS_MAX
47	# Total virtual address space for 32-bit processes is 2^31 (2GB).
48	# Allow randomisation to consume up to 512MB of address space (2^29).
49	default 11 if PPC_256K_PAGES	# 11 = 29 (512MB) - 18 (256K)
50	default 13 if PPC_64K_PAGES	# 13 = 29 (512MB) - 16 (64K)
51	default 15 if PPC_16K_PAGES	# 15 = 29 (512MB) - 14 (16K)
52	default 17			# 17 = 29 (512MB) - 12 (4K)
53
54config ARCH_MMAP_RND_COMPAT_BITS_MIN
55	# Total virtual address space for 32-bit processes is 2^31 (2GB).
56	# Allow randomisation to consume up to 8MB of address space (2^23).
57	default 5 if PPC_256K_PAGES	#  5 = 23 (8MB) - 18 (256K)
58	default 7 if PPC_64K_PAGES	#  7 = 23 (8MB) - 16 (64K)
59	default 9 if PPC_16K_PAGES	#  9 = 23 (8MB) - 14 (16K)
60	default 11			# 11 = 23 (8MB) - 12 (4K)
61
62config NR_IRQS
63	int "Number of virtual interrupt numbers"
64	range 32 1048576
65	default "512"
66	help
67	  This defines the number of virtual interrupt numbers the kernel
68	  can manage. Virtual interrupt numbers are what you see in
69	  /proc/interrupts. If you configure your system to have too few,
70	  drivers will fail to load or worse - handle with care.
71
72config NMI_IPI
73	bool
74	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
75	default y
76
77config PPC_WATCHDOG
78	bool
79	depends on HARDLOCKUP_DETECTOR
80	depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
81	default y
82	help
83	  This is a placeholder when the powerpc hardlockup detector
84	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
85	  selected via the generic lockup detector menu which is why we
86	  have no standalone config option for it here.
87
88config STACKTRACE_SUPPORT
89	bool
90	default y
91
92config LOCKDEP_SUPPORT
93	bool
94	default y
95
96config GENERIC_LOCKBREAK
97	bool
98	default y
99	depends on SMP && PREEMPTION
100
101config GENERIC_HWEIGHT
102	bool
103	default y
104
105config PPC
106	bool
107	default y
108	#
109	# Please keep this list sorted alphabetically.
110	#
111	select ARCH_32BIT_OFF_T if PPC32
112	select ARCH_DISABLE_KASAN_INLINE	if PPC_RADIX_MMU
113	select ARCH_ENABLE_MEMORY_HOTPLUG
114	select ARCH_ENABLE_MEMORY_HOTREMOVE
115	select ARCH_HAS_COPY_MC			if PPC64
116	select ARCH_HAS_CURRENT_STACK_POINTER
117	select ARCH_HAS_DEBUG_VIRTUAL
118	select ARCH_HAS_DEBUG_VM_PGTABLE
119	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
120	select ARCH_HAS_DEVMEM_IS_ALLOWED
121	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
122	select ARCH_HAS_FORTIFY_SOURCE
123	select ARCH_HAS_GCOV_PROFILE_ALL
124	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
125	select ARCH_HAS_KCOV
126	select ARCH_HAS_MEMBARRIER_CALLBACKS
127	select ARCH_HAS_MEMBARRIER_SYNC_CORE
128	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN	if PPC_64S_HASH_MMU
129	select ARCH_HAS_MMIOWB			if PPC64
130	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
131	select ARCH_HAS_PHYS_TO_DMA
132	select ARCH_HAS_PMEM_API
133	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
134	select ARCH_HAS_PTE_SPECIAL
135	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
136	select ARCH_HAS_SET_MEMORY
137	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
138	select ARCH_HAS_STRICT_KERNEL_RWX	if PPC_85xx && !HIBERNATION && !RANDOMIZE_BASE
139	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX
140	select ARCH_HAS_SYSCALL_WRAPPER		if !SPU_BASE && !COMPAT
141	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
142	select ARCH_HAS_UACCESS_FLUSHCACHE
143	select ARCH_HAS_UBSAN_SANITIZE_ALL
144	select ARCH_HAVE_NMI_SAFE_CMPXCHG
145	select ARCH_KEEP_MEMBLOCK
146	select ARCH_MIGHT_HAVE_PC_PARPORT
147	select ARCH_MIGHT_HAVE_PC_SERIO
148	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
149	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
150	select ARCH_SPLIT_ARG64			if PPC32
151	select ARCH_STACKWALK
152	select ARCH_SUPPORTS_ATOMIC_RMW
153	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
154	select ARCH_USE_BUILTIN_BSWAP
155	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
156	select ARCH_USE_MEMTEST
157	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
158	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS
159	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
160	select ARCH_WANT_IPC_PARSE_VERSION
161	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
162	select ARCH_WANT_LD_ORPHAN_WARN
163	select ARCH_WANTS_MODULES_DATA_IN_VMALLOC	if PPC_BOOK3S_32 || PPC_8xx
164	select ARCH_WANTS_NO_INSTR
165	select ARCH_WEAK_RELEASE_ACQUIRE
166	select BINFMT_ELF
167	select BUILDTIME_TABLE_SORT
168	select CLONE_BACKWARDS
169	select CPUMASK_OFFSTACK			if NR_CPUS >= 8192
170	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
171	select DMA_OPS_BYPASS			if PPC64
172	select DMA_OPS				if PPC64
173	select DYNAMIC_FTRACE			if FUNCTION_TRACER
174	select EDAC_ATOMIC_SCRUB
175	select EDAC_SUPPORT
176	select GENERIC_ATOMIC64			if PPC32
177	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
178	select GENERIC_CMOS_UPDATE
179	select GENERIC_CPU_AUTOPROBE
180	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
181	select GENERIC_EARLY_IOREMAP
182	select GENERIC_GETTIMEOFDAY
183	select GENERIC_IRQ_SHOW
184	select GENERIC_IRQ_SHOW_LEVEL
185	select GENERIC_PCI_IOMAP		if PCI
186	select GENERIC_PTDUMP
187	select GENERIC_SMP_IDLE_THREAD
188	select GENERIC_TIME_VSYSCALL
189	select GENERIC_VDSO_TIME_NS
190	select HAVE_ARCH_AUDITSYSCALL
191	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
192	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
193	select HAVE_ARCH_JUMP_LABEL
194	select HAVE_ARCH_JUMP_LABEL_RELATIVE
195	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
196	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
197	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
198	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
199	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
200	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
201	select HAVE_ARCH_KGDB
202	select HAVE_ARCH_MMAP_RND_BITS
203	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
204	select HAVE_ARCH_NVRAM_OPS
205	select HAVE_ARCH_SECCOMP_FILTER
206	select HAVE_ARCH_TRACEHOOK
207	select HAVE_ASM_MODVERSIONS
208	select HAVE_CONTEXT_TRACKING_USER		if PPC64
209	select HAVE_C_RECORDMCOUNT
210	select HAVE_DEBUG_KMEMLEAK
211	select HAVE_DEBUG_STACKOVERFLOW
212	select HAVE_DYNAMIC_FTRACE
213	select HAVE_DYNAMIC_FTRACE_WITH_ARGS	if MPROFILE_KERNEL || PPC32
214	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if MPROFILE_KERNEL || PPC32
215	select HAVE_EBPF_JIT
216	select HAVE_EFFICIENT_UNALIGNED_ACCESS
217	select HAVE_FAST_GUP
218	select HAVE_FTRACE_MCOUNT_RECORD
219	select HAVE_FUNCTION_DESCRIPTORS	if PPC64_ELF_ABI_V1
220	select HAVE_FUNCTION_ERROR_INJECTION
221	select HAVE_FUNCTION_GRAPH_TRACER
222	select HAVE_FUNCTION_TRACER
223	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
224	select HAVE_GENERIC_VDSO
225	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
226	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
227	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
228	select HAVE_IOREMAP_PROT
229	select HAVE_IRQ_TIME_ACCOUNTING
230	select HAVE_KERNEL_GZIP
231	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
232	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
233	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
234	select HAVE_KPROBES
235	select HAVE_KPROBES_ON_FTRACE
236	select HAVE_KRETPROBES
237	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
238	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
239	select HAVE_MOD_ARCH_SPECIFIC
240	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
241	select HAVE_OPTPROBES
242	select HAVE_PERF_EVENTS
243	select HAVE_PERF_EVENTS_NMI		if PPC64
244	select HAVE_PERF_REGS
245	select HAVE_PERF_USER_STACK_DUMP
246	select HAVE_REGS_AND_STACK_ACCESS_API
247	select HAVE_RELIABLE_STACKTRACE
248	select HAVE_RSEQ
249	select HAVE_SETUP_PER_CPU_AREA		if PPC64
250	select HAVE_SOFTIRQ_ON_OWN_STACK
251	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
252	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
253	select HAVE_STATIC_CALL			if PPC32
254	select HAVE_SYSCALL_TRACEPOINTS
255	select HAVE_VIRT_CPU_ACCOUNTING
256	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
257	select IOMMU_HELPER			if PPC64
258	select IRQ_DOMAIN
259	select IRQ_FORCED_THREADING
260	select KASAN_VMALLOC			if KASAN && MODULES
261	select MMU_GATHER_PAGE_SIZE
262	select MMU_GATHER_RCU_TABLE_FREE
263	select MMU_GATHER_MERGE_VMAS
264	select MODULES_USE_ELF_RELA
265	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
266	select NEED_PER_CPU_EMBED_FIRST_CHUNK	if PPC64
267	select NEED_PER_CPU_PAGE_FIRST_CHUNK	if PPC64
268	select NEED_SG_DMA_LENGTH
269	select OF
270	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE
271	select OF_EARLY_FLATTREE
272	select OLD_SIGACTION			if PPC32
273	select OLD_SIGSUSPEND
274	select PCI_DOMAINS			if PCI
275	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
276	select PCI_SYSCALL			if PCI
277	select PPC_DAWR				if PPC64
278	select RTC_LIB
279	select SPARSE_IRQ
280	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
281	select SYSCTL_EXCEPTION_TRACE
282	select THREAD_INFO_IN_TASK
283	select TRACE_IRQFLAGS_SUPPORT
284	#
285	# Please keep this list sorted alphabetically.
286	#
287
288config PPC_LONG_DOUBLE_128
289	depends on PPC64 && ALTIVEC
290	def_bool $(success,test "$(shell,echo __LONG_DOUBLE_128__ | $(CC) -E -P -)" = 1)
291
292config PPC_BARRIER_NOSPEC
293	bool
294	default y
295	depends on PPC_BOOK3S_64 || PPC_E500
296
297config EARLY_PRINTK
298	bool
299	default y
300
301config PANIC_TIMEOUT
302	int
303	default 180
304
305config COMPAT
306	bool "Enable support for 32bit binaries"
307	depends on PPC64
308	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
309	default y if !CPU_LITTLE_ENDIAN
310	select ARCH_WANT_OLD_COMPAT_IPC
311	select COMPAT_OLD_SIGACTION
312
313config SCHED_OMIT_FRAME_POINTER
314	bool
315	default y
316
317config ARCH_MAY_HAVE_PC_FDC
318	bool
319	default PCI
320
321config PPC_UDBG_16550
322	bool
323
324config GENERIC_TBSYNC
325	bool
326	default y if PPC32 && SMP
327
328config AUDIT_ARCH
329	bool
330	default y
331
332config GENERIC_BUG
333	bool
334	default y
335	depends on BUG
336
337config GENERIC_BUG_RELATIVE_POINTERS
338	def_bool y
339	depends on GENERIC_BUG
340
341config SYS_SUPPORTS_APM_EMULATION
342	default y if PMAC_APM_EMU
343	bool
344
345config EPAPR_BOOT
346	bool
347	help
348	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
349
350config DEFAULT_UIMAGE
351	bool
352	help
353	  Used to allow a board to specify it wants a uImage built by default
354
355config ARCH_HIBERNATION_POSSIBLE
356	bool
357	default y
358
359config ARCH_SUSPEND_POSSIBLE
360	def_bool y
361	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
362		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
363		   || 44x || 40x
364
365config ARCH_SUSPEND_NONZERO_CPU
366	def_bool y
367	depends on PPC_POWERNV || PPC_PSERIES
368
369config ARCH_HAS_ADD_PAGES
370	def_bool y
371	depends on ARCH_ENABLE_MEMORY_HOTPLUG
372
373config PPC_DCR_NATIVE
374	bool
375
376config PPC_DCR_MMIO
377	bool
378
379config PPC_DCR
380	bool
381	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
382	default y
383
384config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
385	depends on PPC32
386	depends on !PPC_PMAC && !PPC_CHRP
387	bool "Assign PCI bus numbers from zero individually for each PCI domain"
388	help
389	  By default on PPC32 were PCI bus numbers unique across all PCI domains.
390	  So system could have only 256 PCI buses independently of available
391	  PCI domains. When this option is enabled then PCI bus numbers are
392	  PCI domain dependent and each PCI controller on own domain can have
393	  256 PCI buses, like it is on other Linux architectures.
394
395config PPC_OF_PLATFORM_PCI
396	bool
397	depends on PCI
398	depends on PPC64 # not supported on 32 bits yet
399
400config ARCH_SUPPORTS_UPROBES
401	def_bool y
402
403config PPC_ADV_DEBUG_REGS
404	bool
405	depends on 40x || BOOKE
406	default y
407
408config PPC_ADV_DEBUG_IACS
409	int
410	depends on PPC_ADV_DEBUG_REGS
411	default 4 if 44x
412	default 2
413
414config PPC_ADV_DEBUG_DACS
415	int
416	depends on PPC_ADV_DEBUG_REGS
417	default 2
418
419config PPC_ADV_DEBUG_DVCS
420	int
421	depends on PPC_ADV_DEBUG_REGS
422	default 2 if 44x
423	default 0
424
425config PPC_ADV_DEBUG_DAC_RANGE
426	bool
427	depends on PPC_ADV_DEBUG_REGS && 44x
428	default y
429
430config PPC_DAWR
431	bool
432
433config PGTABLE_LEVELS
434	int
435	default 2 if !PPC64
436	default 4
437
438source "arch/powerpc/sysdev/Kconfig"
439source "arch/powerpc/platforms/Kconfig"
440
441menu "Kernel options"
442
443config HIGHMEM
444	bool "High memory support"
445	depends on PPC32
446	select KMAP_LOCAL
447
448source "kernel/Kconfig.hz"
449
450config MATH_EMULATION
451	bool "Math emulation"
452	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
453	select PPC_FPU_REGS
454	help
455	  Some PowerPC chips designed for embedded applications do not have
456	  a floating-point unit and therefore do not implement the
457	  floating-point instructions in the PowerPC instruction set.  If you
458	  say Y here, the kernel will include code to emulate a floating-point
459	  unit, which will allow programs that use floating-point
460	  instructions to run.
461
462	  This is also useful to emulate missing (optional) instructions
463	  such as fsqrt on cores that do have an FPU but do not implement
464	  them (such as Freescale BookE).
465
466choice
467	prompt "Math emulation options"
468	default MATH_EMULATION_FULL
469	depends on MATH_EMULATION
470
471config MATH_EMULATION_FULL
472	bool "Emulate all the floating point instructions"
473	help
474	  Select this option will enable the kernel to support to emulate
475	  all the floating point instructions. If your SoC doesn't have
476	  a FPU, you should select this.
477
478config MATH_EMULATION_HW_UNIMPLEMENTED
479	bool "Just emulate the FPU unimplemented instructions"
480	help
481	  Select this if you know there does have a hardware FPU on your
482	  SoC, but some floating point instructions are not implemented by that.
483
484endchoice
485
486config PPC_TRANSACTIONAL_MEM
487	bool "Transactional Memory support for POWERPC"
488	depends on PPC_BOOK3S_64
489	depends on SMP
490	select ALTIVEC
491	select VSX
492	help
493	  Support user-mode Transactional Memory on POWERPC.
494
495config PPC_UV
496	bool "Ultravisor support"
497	depends on KVM_BOOK3S_HV_POSSIBLE
498	depends on DEVICE_PRIVATE
499	default n
500	help
501	  This option paravirtualizes the kernel to run in POWER platforms that
502	  supports the Protected Execution Facility (PEF). On such platforms,
503	  the ultravisor firmware runs at a privilege level above the
504	  hypervisor.
505
506	  If unsure, say "N".
507
508config LD_HEAD_STUB_CATCH
509	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
510	depends on PPC64
511	help
512	  Very large kernels can cause linker branch stubs to be generated by
513	  code in head_64.S, which moves the head text sections out of their
514	  specified location. This option can work around the problem.
515
516	  If unsure, say "N".
517
518config MPROFILE_KERNEL
519	depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER
520	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
521
522config HOTPLUG_CPU
523	bool "Support for enabling/disabling CPUs"
524	depends on SMP && (PPC_PSERIES || \
525		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
526	help
527	  Say Y here to be able to disable and re-enable individual
528	  CPUs at runtime on SMP machines.
529
530	  Say N if you are unsure.
531
532config PPC_QUEUED_SPINLOCKS
533	bool "Queued spinlocks" if EXPERT
534	depends on SMP
535	default PPC_BOOK3S_64
536	help
537	  Say Y here to use queued spinlocks which give better scalability and
538	  fairness on large SMP and NUMA systems without harming single threaded
539	  performance.
540
541config ARCH_CPU_PROBE_RELEASE
542	def_bool y
543	depends on HOTPLUG_CPU
544
545config PPC64_SUPPORTS_MEMORY_FAILURE
546	bool "Add support for memory hwpoison"
547	depends on PPC_BOOK3S_64
548	default "y" if PPC_POWERNV
549	select ARCH_SUPPORTS_MEMORY_FAILURE
550
551config KEXEC
552	bool "kexec system call"
553	depends on PPC_BOOK3S || PPC_E500 || (44x && !SMP)
554	select KEXEC_CORE
555	help
556	  kexec is a system call that implements the ability to shutdown your
557	  current kernel, and to start another kernel.  It is like a reboot
558	  but it is independent of the system firmware.   And like a reboot
559	  you can start any kernel with it, not just Linux.
560
561	  The name comes from the similarity to the exec system call.
562
563	  It is an ongoing process to be certain the hardware in a machine
564	  is properly shutdown, so do not be surprised if this code does not
565	  initially work for you.  As of this writing the exact hardware
566	  interface is strongly in flux, so no good recommendation can be
567	  made.
568
569config KEXEC_FILE
570	bool "kexec file based system call"
571	select KEXEC_CORE
572	select HAVE_IMA_KEXEC if IMA
573	select KEXEC_ELF
574	depends on PPC64
575	depends on CRYPTO=y
576	depends on CRYPTO_SHA256=y
577	help
578	  This is a new version of the kexec system call. This call is
579	  file based and takes in file descriptors as system call arguments
580	  for kernel and initramfs as opposed to a list of segments as is the
581	  case for the older kexec call.
582
583config ARCH_HAS_KEXEC_PURGATORY
584	def_bool KEXEC_FILE
585
586config RELOCATABLE
587	bool "Build a relocatable kernel"
588	depends on PPC64 || (FLATMEM && (44x || PPC_85xx))
589	select NONSTATIC_KERNEL
590	help
591	  This builds a kernel image that is capable of running at the
592	  location the kernel is loaded at. For ppc32, there is no any
593	  alignment restrictions, and this feature is a superset of
594	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
595	  16k-aligned base address. The kernel is linked as a
596	  position-independent executable (PIE) and contains dynamic relocations
597	  which are processed early in the bootup process.
598
599	  One use is for the kexec on panic case where the recovery kernel
600	  must live at a different physical address than the primary
601	  kernel.
602
603	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
604	  it has been loaded at and the compile time physical addresses
605	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
606	  setting can still be useful to bootwrappers that need to know the
607	  load address of the kernel (eg. u-boot/mkimage).
608
609config RANDOMIZE_BASE
610	bool "Randomize the address of the kernel image"
611	depends on PPC_85xx && FLATMEM
612	depends on RELOCATABLE
613	help
614	  Randomizes the virtual address at which the kernel image is
615	  loaded, as a security feature that deters exploit attempts
616	  relying on knowledge of the location of kernel internals.
617
618	  If unsure, say Y.
619
620config RELOCATABLE_TEST
621	bool "Test relocatable kernel"
622	depends on (PPC64 && RELOCATABLE)
623	help
624	  This runs the relocatable kernel at the address it was initially
625	  loaded at, which tends to be non-zero and therefore test the
626	  relocation code.
627
628config CRASH_DUMP
629	bool "Build a dump capture kernel"
630	depends on PPC64 || PPC_BOOK3S_32 || PPC_85xx || (44x && !SMP)
631	select RELOCATABLE if PPC64 || 44x || PPC_85xx
632	help
633	  Build a kernel suitable for use as a dump capture kernel.
634	  The same kernel binary can be used as production kernel and dump
635	  capture kernel.
636
637config FA_DUMP
638	bool "Firmware-assisted dump"
639	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
640	select CRASH_CORE
641	select CRASH_DUMP
642	help
643	  A robust mechanism to get reliable kernel crash dump with
644	  assistance from firmware. This approach does not use kexec,
645	  instead firmware assists in booting the capture kernel
646	  while preserving memory contents. Firmware-assisted dump
647	  is meant to be a kdump replacement offering robustness and
648	  speed not possible without system firmware assistance.
649
650	  If unsure, say "y". Only special kernels like petitboot may
651	  need to say "N" here.
652
653config PRESERVE_FA_DUMP
654	bool "Preserve Firmware-assisted dump"
655	depends on PPC64 && PPC_POWERNV && !FA_DUMP
656	help
657	  On a kernel with FA_DUMP disabled, this option helps to preserve
658	  crash data from a previously crash'ed kernel. Useful when the next
659	  memory preserving kernel boot would process this crash data.
660	  Petitboot kernel is the typical usecase for this option.
661
662config OPAL_CORE
663	bool "Export OPAL memory as /sys/firmware/opal/core"
664	depends on PPC64 && PPC_POWERNV
665	help
666	  This option uses the MPIPL support in firmware to provide an
667	  ELF core of OPAL memory after a crash. The ELF core is exported
668	  as /sys/firmware/opal/core file which is helpful in debugging
669	  OPAL crashes using GDB.
670
671config IRQ_ALL_CPUS
672	bool "Distribute interrupts on all CPUs by default"
673	depends on SMP
674	help
675	  This option gives the kernel permission to distribute IRQs across
676	  multiple CPUs.  Saying N here will route all IRQs to the first
677	  CPU.  Generally saying Y is safe, although some problems have been
678	  reported with SMP Power Macintoshes with this option enabled.
679
680config NUMA
681	bool "NUMA Memory Allocation and Scheduler Support"
682	depends on PPC64 && SMP
683	default y if PPC_PSERIES || PPC_POWERNV
684	select USE_PERCPU_NUMA_NODE_ID
685	help
686	  Enable NUMA (Non-Uniform Memory Access) support.
687
688	  The kernel will try to allocate memory used by a CPU on the
689	  local memory controller of the CPU and add some more
690	  NUMA awareness to the kernel.
691
692config NODES_SHIFT
693	int
694	default "8" if PPC64
695	default "4"
696	depends on NUMA
697
698config HAVE_MEMORYLESS_NODES
699	def_bool y
700	depends on NUMA
701
702config ARCH_SELECT_MEMORY_MODEL
703	def_bool y
704	depends on PPC64
705
706config ARCH_FLATMEM_ENABLE
707	def_bool y
708	depends on (PPC64 && !NUMA) || PPC32
709
710config ARCH_SPARSEMEM_ENABLE
711	def_bool y
712	depends on PPC64
713	select SPARSEMEM_VMEMMAP_ENABLE
714
715config ARCH_SPARSEMEM_DEFAULT
716	def_bool y
717	depends on PPC_BOOK3S_64
718
719config ILLEGAL_POINTER_VALUE
720	hex
721	# This is roughly half way between the top of user space and the bottom
722	# of kernel space, which seems about as good as we can get.
723	default 0x5deadbeef0000000 if PPC64
724	default 0
725
726config ARCH_MEMORY_PROBE
727	def_bool y
728	depends on MEMORY_HOTPLUG
729
730choice
731	prompt "Page size"
732	default PPC_64K_PAGES if PPC_BOOK3S_64
733	default PPC_4K_PAGES
734	help
735	  Select the kernel logical page size. Increasing the page size
736	  will reduce software overhead at each page boundary, allow
737	  hardware prefetch mechanisms to be more effective, and allow
738	  larger dma transfers increasing IO efficiency and reducing
739	  overhead. However the utilization of memory will increase.
740	  For example, each cached file will using a multiple of the
741	  page size to hold its contents and the difference between the
742	  end of file and the end of page is wasted.
743
744	  Some dedicated systems, such as software raid serving with
745	  accelerated calculations, have shown significant increases.
746
747	  If you configure a 64 bit kernel for 64k pages but the
748	  processor does not support them, then the kernel will simulate
749	  them with 4k pages, loading them on demand, but with the
750	  reduced software overhead and larger internal fragmentation.
751	  For the 32 bit kernel, a large page option will not be offered
752	  unless it is supported by the configured processor.
753
754	  If unsure, choose 4K_PAGES.
755
756config PPC_4K_PAGES
757	bool "4k page size"
758	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
759
760config PPC_16K_PAGES
761	bool "16k page size"
762	depends on 44x || PPC_8xx
763
764config PPC_64K_PAGES
765	bool "64k page size"
766	depends on 44x || PPC_BOOK3S_64
767	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
768
769config PPC_256K_PAGES
770	bool "256k page size (Requires non-standard binutils settings)"
771	depends on 44x && !PPC_47x
772	help
773	  Make the page size 256k.
774
775	  The kernel will only be able to run applications that have been
776	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
777	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
778	  definition from 0x10000 to 0x40000 in older versions.
779
780endchoice
781
782config PAGE_SIZE_4KB
783	def_bool y
784	depends on PPC_4K_PAGES
785
786config PAGE_SIZE_16KB
787	def_bool y
788	depends on PPC_16K_PAGES
789
790config PAGE_SIZE_64KB
791	def_bool y
792	depends on PPC_64K_PAGES
793
794config PAGE_SIZE_256KB
795	def_bool y
796	depends on PPC_256K_PAGES
797
798config PPC_PAGE_SHIFT
799	int
800	default 18 if PPC_256K_PAGES
801	default 16 if PPC_64K_PAGES
802	default 14 if PPC_16K_PAGES
803	default 12
804
805config THREAD_SHIFT
806	int "Thread shift" if EXPERT
807	range 13 15
808	default "15" if PPC_256K_PAGES
809	default "14" if PPC64
810	default "13"
811	help
812	  Used to define the stack size. The default is almost always what you
813	  want. Only change this if you know what you are doing.
814
815config DATA_SHIFT_BOOL
816	bool "Set custom data alignment"
817	depends on ADVANCED_OPTIONS
818	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
819	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
820		   PPC_85xx
821	help
822	  This option allows you to set the kernel data alignment. When
823	  RAM is mapped by blocks, the alignment needs to fit the size and
824	  number of possible blocks. The default should be OK for most configs.
825
826	  Say N here unless you know what you are doing.
827
828config DATA_SHIFT
829	int "Data shift" if DATA_SHIFT_BOOL
830	default 24 if STRICT_KERNEL_RWX && PPC64
831	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
832	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
833	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_85xx
834	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
835	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
836	default 23 if STRICT_KERNEL_RWX && PPC_8xx
837	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
838	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
839	default 24 if STRICT_KERNEL_RWX && PPC_85xx
840	default PPC_PAGE_SHIFT
841	help
842	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
843	  Smaller is the alignment, greater is the number of necessary DBATs.
844
845	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
846	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
847	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
848	  8M pages will be pinned.
849
850config ARCH_FORCE_MAX_ORDER
851	int "Maximum zone order"
852	range 8 9 if PPC64 && PPC_64K_PAGES
853	default "9" if PPC64 && PPC_64K_PAGES
854	range 13 13 if PPC64 && !PPC_64K_PAGES
855	default "13" if PPC64 && !PPC_64K_PAGES
856	range 9 64 if PPC32 && PPC_16K_PAGES
857	default "9" if PPC32 && PPC_16K_PAGES
858	range 7 64 if PPC32 && PPC_64K_PAGES
859	default "7" if PPC32 && PPC_64K_PAGES
860	range 5 64 if PPC32 && PPC_256K_PAGES
861	default "5" if PPC32 && PPC_256K_PAGES
862	range 11 64
863	default "11"
864	help
865	  The kernel memory allocator divides physically contiguous memory
866	  blocks into "zones", where each zone is a power of two number of
867	  pages.  This option selects the largest power of two that the kernel
868	  keeps in the memory allocator.  If you need to allocate very large
869	  blocks of physically contiguous memory, then you may need to
870	  increase this value.
871
872	  This config option is actually maximum order plus one. For example,
873	  a value of 11 means that the largest free memory block is 2^10 pages.
874
875	  The page size is not necessarily 4KB.  For example, on 64-bit
876	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
877	  this in mind when choosing a value for this option.
878
879config PPC_SUBPAGE_PROT
880	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
881	default n
882	depends on PPC_64S_HASH_MMU && PPC_64K_PAGES
883	help
884	  This option adds support for system call to allow user programs
885	  to set access permissions (read/write, readonly, or no access)
886	  on the 4k subpages of each 64k page.
887
888	  If unsure, say N here.
889
890config PPC_PROT_SAO_LPAR
891	bool "Support PROT_SAO mappings in LPARs"
892	depends on PPC_BOOK3S_64
893	help
894	  This option adds support for PROT_SAO mappings from userspace
895	  inside LPARs on supported CPUs.
896
897	  This may cause issues when performing guest migration from
898	  a CPU that supports SAO to one that does not.
899
900	  If unsure, say N here.
901
902config PPC_COPRO_BASE
903	bool
904
905config SCHED_SMT
906	bool "SMT (Hyperthreading) scheduler support"
907	depends on PPC64 && SMP
908	help
909	  SMT scheduler support improves the CPU scheduler's decision making
910	  when dealing with POWER5 cpus at a cost of slightly increased
911	  overhead in some places. If unsure say N here.
912
913config PPC_DENORMALISATION
914	bool "PowerPC denormalisation exception handling"
915	depends on PPC_BOOK3S_64
916	default "y" if PPC_POWERNV
917	help
918	  Add support for handling denormalisation of single precision
919	  values.  Useful for bare metal only.  If unsure say Y here.
920
921config CMDLINE
922	string "Initial kernel command string"
923	default ""
924	help
925	  On some platforms, there is currently no way for the boot loader to
926	  pass arguments to the kernel. For these platforms, you can supply
927	  some command-line options at build time by entering them here.  In
928	  most cases you will need to specify the root device here.
929
930choice
931	prompt "Kernel command line type" if CMDLINE != ""
932	default CMDLINE_FROM_BOOTLOADER
933
934config CMDLINE_FROM_BOOTLOADER
935	bool "Use bootloader kernel arguments if available"
936	help
937	  Uses the command-line options passed by the boot loader. If
938	  the boot loader doesn't provide any, the default kernel command
939	  string provided in CMDLINE will be used.
940
941config CMDLINE_EXTEND
942	bool "Extend bootloader kernel arguments"
943	help
944	  The command-line arguments provided by the boot loader will be
945	  appended to the default kernel command string.
946
947config CMDLINE_FORCE
948	bool "Always use the default kernel command string"
949	help
950	  Always use the default kernel command string, even if the boot
951	  loader passes other arguments to the kernel.
952	  This is useful if you cannot or don't want to change the
953	  command-line options your boot loader passes to the kernel.
954
955endchoice
956
957config EXTRA_TARGETS
958	string "Additional default image types"
959	help
960	  List additional targets to be built by the bootwrapper here (separated
961	  by spaces).  This is useful for targets that depend of device tree
962	  files in the .dts directory.
963
964	  Targets in this list will be build as part of the default build
965	  target, or when the user does a 'make zImage' or a
966	  'make zImage.initrd'.
967
968	  If unsure, leave blank
969
970config ARCH_WANTS_FREEZER_CONTROL
971	def_bool y
972	depends on ADB_PMU
973
974source "kernel/power/Kconfig"
975
976config PPC_MEM_KEYS
977	prompt "PowerPC Memory Protection Keys"
978	def_bool y
979	depends on PPC_BOOK3S_64
980	depends on PPC_64S_HASH_MMU
981	select ARCH_USES_HIGH_VMA_FLAGS
982	select ARCH_HAS_PKEYS
983	help
984	  Memory Protection Keys provides a mechanism for enforcing
985	  page-based protections, but without requiring modification of the
986	  page tables when an application changes protection domains.
987
988	  For details, see Documentation/core-api/protection-keys.rst
989
990	  If unsure, say y.
991
992config PPC_SECURE_BOOT
993	prompt "Enable secure boot support"
994	bool
995	depends on PPC_POWERNV || PPC_PSERIES
996	depends on IMA_ARCH_POLICY
997	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
998	help
999	  Systems with firmware secure boot enabled need to define security
1000	  policies to extend secure boot to the OS. This config allows a user
1001	  to enable OS secure boot on systems that have firmware support for
1002	  it. If in doubt say N.
1003
1004config PPC_SECVAR_SYSFS
1005	bool "Enable sysfs interface for POWER secure variables"
1006	default y
1007	depends on PPC_SECURE_BOOT
1008	depends on SYSFS
1009	help
1010	  POWER secure variables are managed and controlled by firmware.
1011	  These variables are exposed to userspace via sysfs to enable
1012	  read/write operations on these variables. Say Y if you have
1013	  secure boot enabled and want to expose variables to userspace.
1014
1015config PPC_RTAS_FILTER
1016	bool "Enable filtering of RTAS syscalls"
1017	default y
1018	depends on PPC_RTAS
1019	help
1020	  The RTAS syscall API has security issues that could be used to
1021	  compromise system integrity. This option enforces restrictions on the
1022	  RTAS calls and arguments passed by userspace programs to mitigate
1023	  these issues.
1024
1025	  Say Y unless you know what you are doing and the filter is causing
1026	  problems for you.
1027
1028endmenu
1029
1030config ISA_DMA_API
1031	bool
1032	default PCI
1033
1034menu "Bus options"
1035
1036config ISA
1037	bool "Support for ISA-bus hardware"
1038	depends on PPC_CHRP
1039	select PPC_I8259
1040	help
1041	  Find out whether you have ISA slots on your motherboard.  ISA is the
1042	  name of a bus system, i.e. the way the CPU talks to the other stuff
1043	  inside your box.  If you have an Apple machine, say N here; if you
1044	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1045	  embedded board, consult your board documentation.
1046
1047config GENERIC_ISA_DMA
1048	bool
1049	depends on ISA_DMA_API
1050	default y
1051
1052config PPC_INDIRECT_PCI
1053	bool
1054	depends on PCI
1055	default y if 40x || 44x
1056
1057config SBUS
1058	bool
1059
1060config FSL_SOC
1061	bool
1062
1063config FSL_PCI
1064	bool
1065	select ARCH_HAS_DMA_SET_MASK
1066	select PPC_INDIRECT_PCI
1067	select PCI_QUIRKS
1068
1069config FSL_PMC
1070	bool
1071	default y
1072	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1073	help
1074	  Freescale MPC85xx/MPC86xx power management controller support
1075	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1076
1077config PPC4xx_CPM
1078	bool
1079	default y
1080	depends on SUSPEND && (44x || 40x)
1081	help
1082	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1083	  It also enables support for two different idle states (idle-wait
1084	  and idle-doze).
1085
1086config 4xx_SOC
1087	bool
1088
1089config FSL_LBC
1090	bool "Freescale Local Bus support"
1091	help
1092	  Enables reporting of errors from the Freescale local bus
1093	  controller.  Also contains some common code used by
1094	  drivers for specific local bus peripherals.
1095
1096config FSL_GTM
1097	bool
1098	depends on PPC_83xx || QUICC_ENGINE || CPM2
1099	help
1100	  Freescale General-purpose Timers support
1101
1102config PCI_8260
1103	bool
1104	depends on PCI && 8260
1105	select PPC_INDIRECT_PCI
1106	default y
1107
1108config FSL_RIO
1109	bool "Freescale Embedded SRIO Controller support"
1110	depends on RAPIDIO = y && HAVE_RAPIDIO
1111	default "n"
1112	help
1113	  Include support for RapidIO controller on Freescale embedded
1114	  processors (MPC8548, MPC8641, etc).
1115
1116endmenu
1117
1118config NONSTATIC_KERNEL
1119	bool
1120
1121menu "Advanced setup"
1122	depends on PPC32
1123
1124config ADVANCED_OPTIONS
1125	bool "Prompt for advanced kernel configuration options"
1126	help
1127	  This option will enable prompting for a variety of advanced kernel
1128	  configuration options.  These options can cause the kernel to not
1129	  work if they are set incorrectly, but can be used to optimize certain
1130	  aspects of kernel memory management.
1131
1132	  Unless you know what you are doing, say N here.
1133
1134comment "Default settings for advanced configuration options are used"
1135	depends on !ADVANCED_OPTIONS
1136
1137config LOWMEM_SIZE_BOOL
1138	bool "Set maximum low memory"
1139	depends on ADVANCED_OPTIONS
1140	help
1141	  This option allows you to set the maximum amount of memory which
1142	  will be used as "low memory", that is, memory which the kernel can
1143	  access directly, without having to set up a kernel virtual mapping.
1144	  This can be useful in optimizing the layout of kernel virtual
1145	  memory.
1146
1147	  Say N here unless you know what you are doing.
1148
1149config LOWMEM_SIZE
1150	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1151	default "0x30000000"
1152
1153config LOWMEM_CAM_NUM_BOOL
1154	bool "Set number of CAMs to use to map low memory"
1155	depends on ADVANCED_OPTIONS && PPC_85xx
1156	help
1157	  This option allows you to set the maximum number of CAM slots that
1158	  will be used to map low memory.  There are a limited number of slots
1159	  available and even more limited number that will fit in the L1 MMU.
1160	  However, using more entries will allow mapping more low memory.  This
1161	  can be useful in optimizing the layout of kernel virtual memory.
1162
1163	  Say N here unless you know what you are doing.
1164
1165config LOWMEM_CAM_NUM
1166	depends on PPC_85xx
1167	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1168	default 3 if !STRICT_KERNEL_RWX
1169	default 9 if DATA_SHIFT >= 24
1170	default 12 if DATA_SHIFT >= 22
1171	default 15
1172
1173config DYNAMIC_MEMSTART
1174	bool "Enable page aligned dynamic load address for kernel"
1175	depends on ADVANCED_OPTIONS && FLATMEM && (PPC_85xx || 44x)
1176	select NONSTATIC_KERNEL
1177	help
1178	  This option enables the kernel to be loaded at any page aligned
1179	  physical address. The kernel creates a mapping from KERNELBASE to
1180	  the address where the kernel is loaded. The page size here implies
1181	  the TLB page size of the mapping for kernel on the particular platform.
1182	  Please refer to the init code for finding the TLB page size.
1183
1184	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1185	  kernel image, where the only restriction is the page aligned kernel
1186	  load address. When this option is enabled, the compile time physical
1187	  address CONFIG_PHYSICAL_START is ignored.
1188
1189	  This option is overridden by CONFIG_RELOCATABLE
1190
1191config PAGE_OFFSET_BOOL
1192	bool "Set custom page offset address"
1193	depends on ADVANCED_OPTIONS
1194	help
1195	  This option allows you to set the kernel virtual address at which
1196	  the kernel will map low memory.  This can be useful in optimizing
1197	  the virtual memory layout of the system.
1198
1199	  Say N here unless you know what you are doing.
1200
1201config PAGE_OFFSET
1202	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1203	default "0xc0000000"
1204
1205config KERNEL_START_BOOL
1206	bool "Set custom kernel base address"
1207	depends on ADVANCED_OPTIONS
1208	help
1209	  This option allows you to set the kernel virtual address at which
1210	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1211	  however there are times (like kdump) that one might not want them
1212	  to be the same.
1213
1214	  Say N here unless you know what you are doing.
1215
1216config KERNEL_START
1217	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1218	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1219	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1220	default "0xc0000000"
1221
1222config PHYSICAL_START_BOOL
1223	bool "Set physical address where the kernel is loaded"
1224	depends on ADVANCED_OPTIONS && FLATMEM && PPC_85xx
1225	help
1226	  This gives the physical address where the kernel is loaded.
1227
1228	  Say N here unless you know what you are doing.
1229
1230config PHYSICAL_START
1231	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1232	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1233	default "0x00000000"
1234
1235config PHYSICAL_ALIGN
1236	hex
1237	default "0x04000000" if PPC_85xx
1238	help
1239	  This value puts the alignment restrictions on physical address
1240	  where kernel is loaded and run from. Kernel is compiled for an
1241	  address which meets above alignment restriction.
1242
1243config TASK_SIZE_BOOL
1244	bool "Set custom user task size"
1245	depends on ADVANCED_OPTIONS
1246	help
1247	  This option allows you to set the amount of virtual address space
1248	  allocated to user tasks.  This can be useful in optimizing the
1249	  virtual memory layout of the system.
1250
1251	  Say N here unless you know what you are doing.
1252
1253config TASK_SIZE
1254	hex "Size of user task space" if TASK_SIZE_BOOL
1255	default "0x80000000" if PPC_8xx
1256	default "0xb0000000" if PPC_BOOK3S_32
1257	default "0xc0000000"
1258endmenu
1259
1260if PPC64
1261# This value must have zeroes in the bottom 60 bits otherwise lots will break
1262config PAGE_OFFSET
1263	hex
1264	default "0xc000000000000000"
1265config KERNEL_START
1266	hex
1267	default "0xc000000000000000"
1268config PHYSICAL_START
1269	hex
1270	default "0x00000000"
1271endif
1272
1273config PPC_LIB_RHEAP
1274	bool
1275
1276source "arch/powerpc/kvm/Kconfig"
1277
1278source "kernel/livepatch/Kconfig"
1279