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 HAVE_SETUP_PER_CPU_AREA
59	def_bool PPC64
60
61config NEED_PER_CPU_EMBED_FIRST_CHUNK
62	def_bool y if PPC64
63
64config NEED_PER_CPU_PAGE_FIRST_CHUNK
65	def_bool y if PPC64
66
67config NR_IRQS
68	int "Number of virtual interrupt numbers"
69	range 32 1048576
70	default "512"
71	help
72	  This defines the number of virtual interrupt numbers the kernel
73	  can manage. Virtual interrupt numbers are what you see in
74	  /proc/interrupts. If you configure your system to have too few,
75	  drivers will fail to load or worse - handle with care.
76
77config NMI_IPI
78	bool
79	depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
80	default y
81
82config PPC_WATCHDOG
83	bool
84	depends on HARDLOCKUP_DETECTOR
85	depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
86	default y
87	help
88	  This is a placeholder when the powerpc hardlockup detector
89	  watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
90	  selected via the generic lockup detector menu which is why we
91	  have no standalone config option for it here.
92
93config STACKTRACE_SUPPORT
94	bool
95	default y
96
97config LOCKDEP_SUPPORT
98	bool
99	default y
100
101config GENERIC_LOCKBREAK
102	bool
103	default y
104	depends on SMP && PREEMPTION
105
106config GENERIC_HWEIGHT
107	bool
108	default y
109
110config PPC
111	bool
112	default y
113	#
114	# Please keep this list sorted alphabetically.
115	#
116	select ARCH_32BIT_OFF_T if PPC32
117	select ARCH_ENABLE_MEMORY_HOTPLUG
118	select ARCH_ENABLE_MEMORY_HOTREMOVE
119	select ARCH_HAS_COPY_MC			if PPC64
120	select ARCH_HAS_DEBUG_VIRTUAL
121	select ARCH_HAS_DEBUG_VM_PGTABLE
122	select ARCH_HAS_DEBUG_WX		if STRICT_KERNEL_RWX
123	select ARCH_HAS_DEVMEM_IS_ALLOWED
124	select ARCH_HAS_DMA_MAP_DIRECT 		if PPC_PSERIES
125	select ARCH_HAS_ELF_RANDOMIZE
126	select ARCH_HAS_FORTIFY_SOURCE
127	select ARCH_HAS_GCOV_PROFILE_ALL
128	select ARCH_HAS_HUGEPD			if HUGETLB_PAGE
129	select ARCH_HAS_KCOV
130	select ARCH_HAS_MEMBARRIER_CALLBACKS
131	select ARCH_HAS_MEMBARRIER_SYNC_CORE
132	select ARCH_HAS_MEMREMAP_COMPAT_ALIGN
133	select ARCH_HAS_MMIOWB			if PPC64
134	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
135	select ARCH_HAS_PHYS_TO_DMA
136	select ARCH_HAS_PMEM_API
137	select ARCH_HAS_PTE_DEVMAP		if PPC_BOOK3S_64
138	select ARCH_HAS_PTE_SPECIAL
139	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
140	select ARCH_HAS_SET_MEMORY
141	select ARCH_HAS_STRICT_KERNEL_RWX	if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
142	select ARCH_HAS_STRICT_KERNEL_RWX	if FSL_BOOKE && !HIBERNATION && !RANDOMIZE_BASE
143	select ARCH_HAS_STRICT_MODULE_RWX	if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32
144	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST
145	select ARCH_HAS_UACCESS_FLUSHCACHE
146	select ARCH_HAS_UBSAN_SANITIZE_ALL
147	select ARCH_HAVE_NMI_SAFE_CMPXCHG
148	select ARCH_KEEP_MEMBLOCK
149	select ARCH_MIGHT_HAVE_PC_PARPORT
150	select ARCH_MIGHT_HAVE_PC_SERIO
151	select ARCH_OPTIONAL_KERNEL_RWX		if ARCH_HAS_STRICT_KERNEL_RWX
152	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
153	select ARCH_STACKWALK
154	select ARCH_SUPPORTS_ATOMIC_RMW
155	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC_BOOK3S || PPC_8xx || 40x
156	select ARCH_USE_BUILTIN_BSWAP
157	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
158	select ARCH_USE_MEMTEST
159	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
160	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS
161	select ARCH_WANT_IPC_PARSE_VERSION
162	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
163	select ARCH_WANT_LD_ORPHAN_WARN
164	select ARCH_WEAK_RELEASE_ACQUIRE
165	select BINFMT_ELF
166	select BUILDTIME_TABLE_SORT
167	select CLONE_BACKWARDS
168	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
169	select DMA_OPS_BYPASS			if PPC64
170	select DMA_OPS				if PPC64
171	select DYNAMIC_FTRACE			if FUNCTION_TRACER
172	select EDAC_ATOMIC_SCRUB
173	select EDAC_SUPPORT
174	select GENERIC_ATOMIC64			if PPC32
175	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
176	select GENERIC_CMOS_UPDATE
177	select GENERIC_CPU_AUTOPROBE
178	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
179	select GENERIC_EARLY_IOREMAP
180	select GENERIC_GETTIMEOFDAY
181	select GENERIC_IRQ_SHOW
182	select GENERIC_IRQ_SHOW_LEVEL
183	select GENERIC_PCI_IOMAP		if PCI
184	select GENERIC_PTDUMP
185	select GENERIC_SMP_IDLE_THREAD
186	select GENERIC_TIME_VSYSCALL
187	select GENERIC_VDSO_TIME_NS
188	select HAVE_ARCH_AUDITSYSCALL
189	select HAVE_ARCH_HUGE_VMALLOC		if HAVE_ARCH_HUGE_VMAP
190	select HAVE_ARCH_HUGE_VMAP		if PPC_RADIX_MMU || PPC_8xx
191	select HAVE_ARCH_JUMP_LABEL
192	select HAVE_ARCH_JUMP_LABEL_RELATIVE
193	select HAVE_ARCH_KASAN			if PPC32 && PPC_PAGE_SHIFT <= 14
194	select HAVE_ARCH_KASAN_VMALLOC		if PPC32 && PPC_PAGE_SHIFT <= 14
195	select HAVE_ARCH_KFENCE			if PPC_BOOK3S_32 || PPC_8xx || 40x
196	select HAVE_ARCH_KGDB
197	select HAVE_ARCH_MMAP_RND_BITS
198	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
199	select HAVE_ARCH_NVRAM_OPS
200	select HAVE_ARCH_SECCOMP_FILTER
201	select HAVE_ARCH_TRACEHOOK
202	select HAVE_ASM_MODVERSIONS
203	select HAVE_CONTEXT_TRACKING		if PPC64
204	select HAVE_C_RECORDMCOUNT
205	select HAVE_DEBUG_KMEMLEAK
206	select HAVE_DEBUG_STACKOVERFLOW
207	select HAVE_DYNAMIC_FTRACE
208	select HAVE_DYNAMIC_FTRACE_WITH_REGS	if MPROFILE_KERNEL
209	select HAVE_EBPF_JIT
210	select HAVE_EFFICIENT_UNALIGNED_ACCESS	if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
211	select HAVE_FAST_GUP
212	select HAVE_FTRACE_MCOUNT_RECORD
213	select HAVE_FUNCTION_ERROR_INJECTION
214	select HAVE_FUNCTION_GRAPH_TRACER
215	select HAVE_FUNCTION_TRACER
216	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
217	select HAVE_GENERIC_VDSO
218	select HAVE_HARDLOCKUP_DETECTOR_ARCH	if PPC_BOOK3S_64 && SMP
219	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
220	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
221	select HAVE_IOREMAP_PROT
222	select HAVE_IRQ_EXIT_ON_IRQ_STACK
223	select HAVE_IRQ_TIME_ACCOUNTING
224	select HAVE_KERNEL_GZIP
225	select HAVE_KERNEL_LZMA			if DEFAULT_UIMAGE
226	select HAVE_KERNEL_LZO			if DEFAULT_UIMAGE
227	select HAVE_KERNEL_XZ			if PPC_BOOK3S || 44x
228	select HAVE_KPROBES
229	select HAVE_KPROBES_ON_FTRACE
230	select HAVE_KRETPROBES
231	select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
232	select HAVE_LIVEPATCH			if HAVE_DYNAMIC_FTRACE_WITH_REGS
233	select HAVE_MOD_ARCH_SPECIFIC
234	select HAVE_NMI				if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
235	select HAVE_OPTPROBES
236	select HAVE_PERF_EVENTS
237	select HAVE_PERF_EVENTS_NMI		if PPC64
238	select HAVE_PERF_REGS
239	select HAVE_PERF_USER_STACK_DUMP
240	select HAVE_REGS_AND_STACK_ACCESS_API
241	select HAVE_RELIABLE_STACKTRACE
242	select HAVE_RSEQ
243	select HAVE_SOFTIRQ_ON_OWN_STACK
244	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
245	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
246	select HAVE_STATIC_CALL			if PPC32
247	select HAVE_SYSCALL_TRACEPOINTS
248	select HAVE_VIRT_CPU_ACCOUNTING
249	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
250	select IOMMU_HELPER			if PPC64
251	select IRQ_DOMAIN
252	select IRQ_FORCED_THREADING
253	select MMU_GATHER_PAGE_SIZE
254	select MMU_GATHER_RCU_TABLE_FREE
255	select MODULES_USE_ELF_RELA
256	select NEED_DMA_MAP_STATE		if PPC64 || NOT_COHERENT_CACHE
257	select NEED_SG_DMA_LENGTH
258	select OF
259	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE
260	select OF_EARLY_FLATTREE
261	select OLD_SIGACTION			if PPC32
262	select OLD_SIGSUSPEND
263	select PCI_DOMAINS			if PCI
264	select PCI_MSI_ARCH_FALLBACKS		if PCI_MSI
265	select PCI_SYSCALL			if PCI
266	select PPC_DAWR				if PPC64
267	select RTC_LIB
268	select SPARSE_IRQ
269	select STRICT_KERNEL_RWX if STRICT_MODULE_RWX
270	select SYSCTL_EXCEPTION_TRACE
271	select THREAD_INFO_IN_TASK
272	select TRACE_IRQFLAGS_SUPPORT
273	select VIRT_TO_BUS			if !PPC64
274	#
275	# Please keep this list sorted alphabetically.
276	#
277
278config PPC_BARRIER_NOSPEC
279	bool
280	default y
281	depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
282
283config EARLY_PRINTK
284	bool
285	default y
286
287config PANIC_TIMEOUT
288	int
289	default 180
290
291config COMPAT
292	bool "Enable support for 32bit binaries"
293	depends on PPC64
294	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
295	default y if !CPU_LITTLE_ENDIAN
296	select ARCH_WANT_OLD_COMPAT_IPC
297	select COMPAT_OLD_SIGACTION
298
299config SYSVIPC_COMPAT
300	bool
301	depends on COMPAT && SYSVIPC
302	default y
303
304config SCHED_OMIT_FRAME_POINTER
305	bool
306	default y
307
308config ARCH_MAY_HAVE_PC_FDC
309	bool
310	default PCI
311
312config PPC_UDBG_16550
313	bool
314
315config GENERIC_TBSYNC
316	bool
317	default y if PPC32 && SMP
318
319config AUDIT_ARCH
320	bool
321	default y
322
323config GENERIC_BUG
324	bool
325	default y
326	depends on BUG
327
328config GENERIC_BUG_RELATIVE_POINTERS
329	def_bool y
330	depends on GENERIC_BUG
331
332config SYS_SUPPORTS_APM_EMULATION
333	default y if PMAC_APM_EMU
334	bool
335
336config EPAPR_BOOT
337	bool
338	help
339	  Used to allow a board to specify it wants an ePAPR compliant wrapper.
340
341config DEFAULT_UIMAGE
342	bool
343	help
344	  Used to allow a board to specify it wants a uImage built by default
345
346config ARCH_HIBERNATION_POSSIBLE
347	bool
348	default y
349
350config ARCH_SUSPEND_POSSIBLE
351	def_bool y
352	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
353		   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
354		   || 44x || 40x
355
356config ARCH_SUSPEND_NONZERO_CPU
357	def_bool y
358	depends on PPC_POWERNV || PPC_PSERIES
359
360config PPC_DCR_NATIVE
361	bool
362
363config PPC_DCR_MMIO
364	bool
365
366config PPC_DCR
367	bool
368	depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
369	default y
370
371config PPC_OF_PLATFORM_PCI
372	bool
373	depends on PCI
374	depends on PPC64 # not supported on 32 bits yet
375
376config ARCH_SUPPORTS_UPROBES
377	def_bool y
378
379config PPC_ADV_DEBUG_REGS
380	bool
381	depends on 40x || BOOKE
382	default y
383
384config PPC_ADV_DEBUG_IACS
385	int
386	depends on PPC_ADV_DEBUG_REGS
387	default 4 if 44x
388	default 2
389
390config PPC_ADV_DEBUG_DACS
391	int
392	depends on PPC_ADV_DEBUG_REGS
393	default 2
394
395config PPC_ADV_DEBUG_DVCS
396	int
397	depends on PPC_ADV_DEBUG_REGS
398	default 2 if 44x
399	default 0
400
401config PPC_ADV_DEBUG_DAC_RANGE
402	bool
403	depends on PPC_ADV_DEBUG_REGS && 44x
404	default y
405
406config PPC_DAWR
407	bool
408
409config PGTABLE_LEVELS
410	int
411	default 2 if !PPC64
412	default 4
413
414source "arch/powerpc/sysdev/Kconfig"
415source "arch/powerpc/platforms/Kconfig"
416
417menu "Kernel options"
418
419config HIGHMEM
420	bool "High memory support"
421	depends on PPC32
422	select KMAP_LOCAL
423
424source "kernel/Kconfig.hz"
425
426config MATH_EMULATION
427	bool "Math emulation"
428	depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT
429	select PPC_FPU_REGS
430	help
431	  Some PowerPC chips designed for embedded applications do not have
432	  a floating-point unit and therefore do not implement the
433	  floating-point instructions in the PowerPC instruction set.  If you
434	  say Y here, the kernel will include code to emulate a floating-point
435	  unit, which will allow programs that use floating-point
436	  instructions to run.
437
438	  This is also useful to emulate missing (optional) instructions
439	  such as fsqrt on cores that do have an FPU but do not implement
440	  them (such as Freescale BookE).
441
442choice
443	prompt "Math emulation options"
444	default MATH_EMULATION_FULL
445	depends on MATH_EMULATION
446
447config	MATH_EMULATION_FULL
448	bool "Emulate all the floating point instructions"
449	help
450	  Select this option will enable the kernel to support to emulate
451	  all the floating point instructions. If your SoC doesn't have
452	  a FPU, you should select this.
453
454config MATH_EMULATION_HW_UNIMPLEMENTED
455	bool "Just emulate the FPU unimplemented instructions"
456	help
457	  Select this if you know there does have a hardware FPU on your
458	  SoC, but some floating point instructions are not implemented by that.
459
460endchoice
461
462config PPC_TRANSACTIONAL_MEM
463	bool "Transactional Memory support for POWERPC"
464	depends on PPC_BOOK3S_64
465	depends on SMP
466	select ALTIVEC
467	select VSX
468	help
469	  Support user-mode Transactional Memory on POWERPC.
470
471config PPC_UV
472	bool "Ultravisor support"
473	depends on KVM_BOOK3S_HV_POSSIBLE
474	depends on DEVICE_PRIVATE
475	default n
476	help
477	  This option paravirtualizes the kernel to run in POWER platforms that
478	  supports the Protected Execution Facility (PEF). On such platforms,
479	  the ultravisor firmware runs at a privilege level above the
480	  hypervisor.
481
482	  If unsure, say "N".
483
484config LD_HEAD_STUB_CATCH
485	bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
486	depends on PPC64
487	help
488	  Very large kernels can cause linker branch stubs to be generated by
489	  code in head_64.S, which moves the head text sections out of their
490	  specified location. This option can work around the problem.
491
492	  If unsure, say "N".
493
494config MPROFILE_KERNEL
495	depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER
496	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
497
498config HOTPLUG_CPU
499	bool "Support for enabling/disabling CPUs"
500	depends on SMP && (PPC_PSERIES || \
501		PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
502	help
503	  Say Y here to be able to disable and re-enable individual
504	  CPUs at runtime on SMP machines.
505
506	  Say N if you are unsure.
507
508config PPC_QUEUED_SPINLOCKS
509	bool "Queued spinlocks" if EXPERT
510	depends on SMP
511	default PPC_BOOK3S_64
512	help
513	  Say Y here to use queued spinlocks which give better scalability and
514	  fairness on large SMP and NUMA systems without harming single threaded
515	  performance.
516
517config ARCH_CPU_PROBE_RELEASE
518	def_bool y
519	depends on HOTPLUG_CPU
520
521config PPC64_SUPPORTS_MEMORY_FAILURE
522	bool "Add support for memory hwpoison"
523	depends on PPC_BOOK3S_64
524	default "y" if PPC_POWERNV
525	select ARCH_SUPPORTS_MEMORY_FAILURE
526
527config KEXEC
528	bool "kexec system call"
529	depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
530	select KEXEC_CORE
531	help
532	  kexec is a system call that implements the ability to shutdown your
533	  current kernel, and to start another kernel.  It is like a reboot
534	  but it is independent of the system firmware.   And like a reboot
535	  you can start any kernel with it, not just Linux.
536
537	  The name comes from the similarity to the exec system call.
538
539	  It is an ongoing process to be certain the hardware in a machine
540	  is properly shutdown, so do not be surprised if this code does not
541	  initially work for you.  As of this writing the exact hardware
542	  interface is strongly in flux, so no good recommendation can be
543	  made.
544
545config KEXEC_FILE
546	bool "kexec file based system call"
547	select KEXEC_CORE
548	select HAVE_IMA_KEXEC if IMA
549	select BUILD_BIN2C
550	select KEXEC_ELF
551	depends on PPC64
552	depends on CRYPTO=y
553	depends on CRYPTO_SHA256=y
554	help
555	  This is a new version of the kexec system call. This call is
556	  file based and takes in file descriptors as system call arguments
557	  for kernel and initramfs as opposed to a list of segments as is the
558	  case for the older kexec call.
559
560config ARCH_HAS_KEXEC_PURGATORY
561	def_bool KEXEC_FILE
562
563config RELOCATABLE
564	bool "Build a relocatable kernel"
565	depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
566	select NONSTATIC_KERNEL
567	select MODULE_REL_CRCS if MODVERSIONS
568	help
569	  This builds a kernel image that is capable of running at the
570	  location the kernel is loaded at. For ppc32, there is no any
571	  alignment restrictions, and this feature is a superset of
572	  DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
573	  16k-aligned base address. The kernel is linked as a
574	  position-independent executable (PIE) and contains dynamic relocations
575	  which are processed early in the bootup process.
576
577	  One use is for the kexec on panic case where the recovery kernel
578	  must live at a different physical address than the primary
579	  kernel.
580
581	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
582	  it has been loaded at and the compile time physical addresses
583	  CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
584	  setting can still be useful to bootwrappers that need to know the
585	  load address of the kernel (eg. u-boot/mkimage).
586
587config RANDOMIZE_BASE
588	bool "Randomize the address of the kernel image"
589	depends on (FSL_BOOKE && FLATMEM && PPC32)
590	depends on RELOCATABLE
591	help
592	  Randomizes the virtual address at which the kernel image is
593	  loaded, as a security feature that deters exploit attempts
594	  relying on knowledge of the location of kernel internals.
595
596	  If unsure, say Y.
597
598config RELOCATABLE_TEST
599	bool "Test relocatable kernel"
600	depends on (PPC64 && RELOCATABLE)
601	help
602	  This runs the relocatable kernel at the address it was initially
603	  loaded at, which tends to be non-zero and therefore test the
604	  relocation code.
605
606config CRASH_DUMP
607	bool "Build a dump capture kernel"
608	depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)
609	select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
610	help
611	  Build a kernel suitable for use as a dump capture kernel.
612	  The same kernel binary can be used as production kernel and dump
613	  capture kernel.
614
615config FA_DUMP
616	bool "Firmware-assisted dump"
617	depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
618	select CRASH_CORE
619	select CRASH_DUMP
620	help
621	  A robust mechanism to get reliable kernel crash dump with
622	  assistance from firmware. This approach does not use kexec,
623	  instead firmware assists in booting the capture kernel
624	  while preserving memory contents. Firmware-assisted dump
625	  is meant to be a kdump replacement offering robustness and
626	  speed not possible without system firmware assistance.
627
628	  If unsure, say "y". Only special kernels like petitboot may
629	  need to say "N" here.
630
631config PRESERVE_FA_DUMP
632	bool "Preserve Firmware-assisted dump"
633	depends on PPC64 && PPC_POWERNV && !FA_DUMP
634	help
635	  On a kernel with FA_DUMP disabled, this option helps to preserve
636	  crash data from a previously crash'ed kernel. Useful when the next
637	  memory preserving kernel boot would process this crash data.
638	  Petitboot kernel is the typical usecase for this option.
639
640config OPAL_CORE
641	bool "Export OPAL memory as /sys/firmware/opal/core"
642	depends on PPC64 && PPC_POWERNV
643	help
644	  This option uses the MPIPL support in firmware to provide an
645	  ELF core of OPAL memory after a crash. The ELF core is exported
646	  as /sys/firmware/opal/core file which is helpful in debugging
647	  OPAL crashes using GDB.
648
649config IRQ_ALL_CPUS
650	bool "Distribute interrupts on all CPUs by default"
651	depends on SMP
652	help
653	  This option gives the kernel permission to distribute IRQs across
654	  multiple CPUs.  Saying N here will route all IRQs to the first
655	  CPU.  Generally saying Y is safe, although some problems have been
656	  reported with SMP Power Macintoshes with this option enabled.
657
658config NUMA
659	bool "NUMA Memory Allocation and Scheduler Support"
660	depends on PPC64 && SMP
661	default y if PPC_PSERIES || PPC_POWERNV
662	help
663	  Enable NUMA (Non-Uniform Memory Access) support.
664
665	  The kernel will try to allocate memory used by a CPU on the
666	  local memory controller of the CPU and add some more
667	  NUMA awareness to the kernel.
668
669config NODES_SHIFT
670	int
671	default "8" if PPC64
672	default "4"
673	depends on NUMA
674
675config USE_PERCPU_NUMA_NODE_ID
676	def_bool y
677	depends on NUMA
678
679config HAVE_MEMORYLESS_NODES
680	def_bool y
681	depends on NUMA
682
683config ARCH_SELECT_MEMORY_MODEL
684	def_bool y
685	depends on PPC64
686
687config ARCH_FLATMEM_ENABLE
688	def_bool y
689	depends on (PPC64 && !NUMA) || PPC32
690
691config ARCH_SPARSEMEM_ENABLE
692	def_bool y
693	depends on PPC64
694	select SPARSEMEM_VMEMMAP_ENABLE
695
696config ARCH_SPARSEMEM_DEFAULT
697	def_bool y
698	depends on PPC_BOOK3S_64
699
700config ILLEGAL_POINTER_VALUE
701	hex
702	# This is roughly half way between the top of user space and the bottom
703	# of kernel space, which seems about as good as we can get.
704	default 0x5deadbeef0000000 if PPC64
705	default 0
706
707config ARCH_MEMORY_PROBE
708	def_bool y
709	depends on MEMORY_HOTPLUG
710
711choice
712	prompt "Page size"
713	default PPC_64K_PAGES if PPC_BOOK3S_64
714	default PPC_4K_PAGES
715	help
716	  Select the kernel logical page size. Increasing the page size
717	  will reduce software overhead at each page boundary, allow
718	  hardware prefetch mechanisms to be more effective, and allow
719	  larger dma transfers increasing IO efficiency and reducing
720	  overhead. However the utilization of memory will increase.
721	  For example, each cached file will using a multiple of the
722	  page size to hold its contents and the difference between the
723	  end of file and the end of page is wasted.
724
725	  Some dedicated systems, such as software raid serving with
726	  accelerated calculations, have shown significant increases.
727
728	  If you configure a 64 bit kernel for 64k pages but the
729	  processor does not support them, then the kernel will simulate
730	  them with 4k pages, loading them on demand, but with the
731	  reduced software overhead and larger internal fragmentation.
732	  For the 32 bit kernel, a large page option will not be offered
733	  unless it is supported by the configured processor.
734
735	  If unsure, choose 4K_PAGES.
736
737config PPC_4K_PAGES
738	bool "4k page size"
739	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
740
741config PPC_16K_PAGES
742	bool "16k page size"
743	depends on 44x || PPC_8xx
744
745config PPC_64K_PAGES
746	bool "64k page size"
747	depends on 44x || PPC_BOOK3S_64
748	select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
749
750config PPC_256K_PAGES
751	bool "256k page size (Requires non-standard binutils settings)"
752	depends on 44x && !PPC_47x
753	help
754	  Make the page size 256k.
755
756	  The kernel will only be able to run applications that have been
757	  compiled with '-zmax-page-size' set to 256K (the default is 64K) using
758	  binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE
759	  definition from 0x10000 to 0x40000 in older versions.
760
761endchoice
762
763config PPC_PAGE_SHIFT
764	int
765	default 18 if PPC_256K_PAGES
766	default 16 if PPC_64K_PAGES
767	default 14 if PPC_16K_PAGES
768	default 12
769
770config THREAD_SHIFT
771	int "Thread shift" if EXPERT
772	range 13 15
773	default "15" if PPC_256K_PAGES
774	default "14" if PPC64
775	default "14" if KASAN
776	default "13"
777	help
778	  Used to define the stack size. The default is almost always what you
779	  want. Only change this if you know what you are doing.
780
781config DATA_SHIFT_BOOL
782	bool "Set custom data alignment"
783	depends on ADVANCED_OPTIONS
784	depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE
785	depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) || \
786		   FSL_BOOKE
787	help
788	  This option allows you to set the kernel data alignment. When
789	  RAM is mapped by blocks, the alignment needs to fit the size and
790	  number of possible blocks. The default should be OK for most configs.
791
792	  Say N here unless you know what you are doing.
793
794config DATA_SHIFT
795	int "Data shift" if DATA_SHIFT_BOOL
796	default 24 if STRICT_KERNEL_RWX && PPC64
797	range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
798	range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
799	range 20 24 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_FSL_BOOKE
800	default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
801	default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32
802	default 23 if STRICT_KERNEL_RWX && PPC_8xx
803	default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA
804	default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx
805	default 24 if STRICT_KERNEL_RWX && FSL_BOOKE
806	default PPC_PAGE_SHIFT
807	help
808	  On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
809	  Smaller is the alignment, greater is the number of necessary DBATs.
810
811	  On 8xx, large pages (512kb or 8M) are used to map kernel linear
812	  memory. Aligning to 8M reduces TLB misses as only 8M pages are used
813	  in that case. If PIN_TLB is selected, it must be aligned to 8M as
814	  8M pages will be pinned.
815
816config FORCE_MAX_ZONEORDER
817	int "Maximum zone order"
818	range 8 9 if PPC64 && PPC_64K_PAGES
819	default "9" if PPC64 && PPC_64K_PAGES
820	range 13 13 if PPC64 && !PPC_64K_PAGES
821	default "13" if PPC64 && !PPC_64K_PAGES
822	range 9 64 if PPC32 && PPC_16K_PAGES
823	default "9" if PPC32 && PPC_16K_PAGES
824	range 7 64 if PPC32 && PPC_64K_PAGES
825	default "7" if PPC32 && PPC_64K_PAGES
826	range 5 64 if PPC32 && PPC_256K_PAGES
827	default "5" if PPC32 && PPC_256K_PAGES
828	range 11 64
829	default "11"
830	help
831	  The kernel memory allocator divides physically contiguous memory
832	  blocks into "zones", where each zone is a power of two number of
833	  pages.  This option selects the largest power of two that the kernel
834	  keeps in the memory allocator.  If you need to allocate very large
835	  blocks of physically contiguous memory, then you may need to
836	  increase this value.
837
838	  This config option is actually maximum order plus one. For example,
839	  a value of 11 means that the largest free memory block is 2^10 pages.
840
841	  The page size is not necessarily 4KB.  For example, on 64-bit
842	  systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
843	  this in mind when choosing a value for this option.
844
845config PPC_SUBPAGE_PROT
846	bool "Support setting protections for 4k subpages (subpage_prot syscall)"
847	default n
848	depends on PPC_BOOK3S_64 && PPC_64K_PAGES
849	help
850	  This option adds support for system call to allow user programs
851	  to set access permissions (read/write, readonly, or no access)
852	  on the 4k subpages of each 64k page.
853
854	  If unsure, say N here.
855
856config PPC_PROT_SAO_LPAR
857	bool "Support PROT_SAO mappings in LPARs"
858	depends on PPC_BOOK3S_64
859	help
860	  This option adds support for PROT_SAO mappings from userspace
861	  inside LPARs on supported CPUs.
862
863	  This may cause issues when performing guest migration from
864	  a CPU that supports SAO to one that does not.
865
866	  If unsure, say N here.
867
868config PPC_COPRO_BASE
869	bool
870
871config SCHED_SMT
872	bool "SMT (Hyperthreading) scheduler support"
873	depends on PPC64 && SMP
874	help
875	  SMT scheduler support improves the CPU scheduler's decision making
876	  when dealing with POWER5 cpus at a cost of slightly increased
877	  overhead in some places. If unsure say N here.
878
879config PPC_DENORMALISATION
880	bool "PowerPC denormalisation exception handling"
881	depends on PPC_BOOK3S_64
882	default "y" if PPC_POWERNV
883	help
884	  Add support for handling denormalisation of single precision
885	  values.  Useful for bare metal only.  If unsure say Y here.
886
887config CMDLINE
888	string "Initial kernel command string"
889	default ""
890	help
891	  On some platforms, there is currently no way for the boot loader to
892	  pass arguments to the kernel. For these platforms, you can supply
893	  some command-line options at build time by entering them here.  In
894	  most cases you will need to specify the root device here.
895
896choice
897	prompt "Kernel command line type" if CMDLINE != ""
898	default CMDLINE_FROM_BOOTLOADER
899
900config CMDLINE_FROM_BOOTLOADER
901	bool "Use bootloader kernel arguments if available"
902	help
903	  Uses the command-line options passed by the boot loader. If
904	  the boot loader doesn't provide any, the default kernel command
905	  string provided in CMDLINE will be used.
906
907config CMDLINE_EXTEND
908	bool "Extend bootloader kernel arguments"
909	help
910	  The command-line arguments provided by the boot loader will be
911	  appended to the default kernel command string.
912
913config CMDLINE_FORCE
914	bool "Always use the default kernel command string"
915	help
916	  Always use the default kernel command string, even if the boot
917	  loader passes other arguments to the kernel.
918	  This is useful if you cannot or don't want to change the
919	  command-line options your boot loader passes to the kernel.
920
921endchoice
922
923config EXTRA_TARGETS
924	string "Additional default image types"
925	help
926	  List additional targets to be built by the bootwrapper here (separated
927	  by spaces).  This is useful for targets that depend of device tree
928	  files in the .dts directory.
929
930	  Targets in this list will be build as part of the default build
931	  target, or when the user does a 'make zImage' or a
932	  'make zImage.initrd'.
933
934	  If unsure, leave blank
935
936config ARCH_WANTS_FREEZER_CONTROL
937	def_bool y
938	depends on ADB_PMU
939
940source "kernel/power/Kconfig"
941
942config PPC_MEM_KEYS
943	prompt "PowerPC Memory Protection Keys"
944	def_bool y
945	depends on PPC_BOOK3S_64
946	select ARCH_USES_HIGH_VMA_FLAGS
947	select ARCH_HAS_PKEYS
948	help
949	  Memory Protection Keys provides a mechanism for enforcing
950	  page-based protections, but without requiring modification of the
951	  page tables when an application changes protection domains.
952
953	  For details, see Documentation/core-api/protection-keys.rst
954
955	  If unsure, say y.
956
957config PPC_SECURE_BOOT
958	prompt "Enable secure boot support"
959	bool
960	depends on PPC_POWERNV || PPC_PSERIES
961	depends on IMA_ARCH_POLICY
962	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
963	help
964	  Systems with firmware secure boot enabled need to define security
965	  policies to extend secure boot to the OS. This config allows a user
966	  to enable OS secure boot on systems that have firmware support for
967	  it. If in doubt say N.
968
969config PPC_SECVAR_SYSFS
970	bool "Enable sysfs interface for POWER secure variables"
971	default y
972	depends on PPC_SECURE_BOOT
973	depends on SYSFS
974	help
975	  POWER secure variables are managed and controlled by firmware.
976	  These variables are exposed to userspace via sysfs to enable
977	  read/write operations on these variables. Say Y if you have
978	  secure boot enabled and want to expose variables to userspace.
979
980config PPC_RTAS_FILTER
981	bool "Enable filtering of RTAS syscalls"
982	default y
983	depends on PPC_RTAS
984	help
985	  The RTAS syscall API has security issues that could be used to
986	  compromise system integrity. This option enforces restrictions on the
987	  RTAS calls and arguments passed by userspace programs to mitigate
988	  these issues.
989
990	  Say Y unless you know what you are doing and the filter is causing
991	  problems for you.
992
993endmenu
994
995config ISA_DMA_API
996	bool
997	default PCI
998
999menu "Bus options"
1000
1001config ISA
1002	bool "Support for ISA-bus hardware"
1003	depends on PPC_CHRP
1004	select PPC_I8259
1005	help
1006	  Find out whether you have ISA slots on your motherboard.  ISA is the
1007	  name of a bus system, i.e. the way the CPU talks to the other stuff
1008	  inside your box.  If you have an Apple machine, say N here; if you
1009	  have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1010	  embedded board, consult your board documentation.
1011
1012config GENERIC_ISA_DMA
1013	bool
1014	depends on ISA_DMA_API
1015	default y
1016
1017config PPC_INDIRECT_PCI
1018	bool
1019	depends on PCI
1020	default y if 40x || 44x
1021
1022config SBUS
1023	bool
1024
1025config FSL_SOC
1026	bool
1027
1028config FSL_PCI
1029	bool
1030	select ARCH_HAS_DMA_SET_MASK
1031	select PPC_INDIRECT_PCI
1032	select PCI_QUIRKS
1033
1034config FSL_PMC
1035	bool
1036	default y
1037	depends on SUSPEND && (PPC_85xx || PPC_86xx)
1038	help
1039	  Freescale MPC85xx/MPC86xx power management controller support
1040	  (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1041
1042config PPC4xx_CPM
1043	bool
1044	default y
1045	depends on SUSPEND && (44x || 40x)
1046	help
1047	  PPC4xx Clock Power Management (CPM) support (suspend/resume).
1048	  It also enables support for two different idle states (idle-wait
1049	  and idle-doze).
1050
1051config 4xx_SOC
1052	bool
1053
1054config FSL_LBC
1055	bool "Freescale Local Bus support"
1056	help
1057	  Enables reporting of errors from the Freescale local bus
1058	  controller.  Also contains some common code used by
1059	  drivers for specific local bus peripherals.
1060
1061config FSL_GTM
1062	bool
1063	depends on PPC_83xx || QUICC_ENGINE || CPM2
1064	help
1065	  Freescale General-purpose Timers support
1066
1067config PCI_8260
1068	bool
1069	depends on PCI && 8260
1070	select PPC_INDIRECT_PCI
1071	default y
1072
1073config FSL_RIO
1074	bool "Freescale Embedded SRIO Controller support"
1075	depends on RAPIDIO = y && HAVE_RAPIDIO
1076	default "n"
1077	help
1078	  Include support for RapidIO controller on Freescale embedded
1079	  processors (MPC8548, MPC8641, etc).
1080
1081endmenu
1082
1083config NONSTATIC_KERNEL
1084	bool
1085
1086menu "Advanced setup"
1087	depends on PPC32
1088
1089config ADVANCED_OPTIONS
1090	bool "Prompt for advanced kernel configuration options"
1091	help
1092	  This option will enable prompting for a variety of advanced kernel
1093	  configuration options.  These options can cause the kernel to not
1094	  work if they are set incorrectly, but can be used to optimize certain
1095	  aspects of kernel memory management.
1096
1097	  Unless you know what you are doing, say N here.
1098
1099comment "Default settings for advanced configuration options are used"
1100	depends on !ADVANCED_OPTIONS
1101
1102config LOWMEM_SIZE_BOOL
1103	bool "Set maximum low memory"
1104	depends on ADVANCED_OPTIONS
1105	help
1106	  This option allows you to set the maximum amount of memory which
1107	  will be used as "low memory", that is, memory which the kernel can
1108	  access directly, without having to set up a kernel virtual mapping.
1109	  This can be useful in optimizing the layout of kernel virtual
1110	  memory.
1111
1112	  Say N here unless you know what you are doing.
1113
1114config LOWMEM_SIZE
1115	hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1116	default "0x30000000"
1117
1118config LOWMEM_CAM_NUM_BOOL
1119	bool "Set number of CAMs to use to map low memory"
1120	depends on ADVANCED_OPTIONS && FSL_BOOKE
1121	help
1122	  This option allows you to set the maximum number of CAM slots that
1123	  will be used to map low memory.  There are a limited number of slots
1124	  available and even more limited number that will fit in the L1 MMU.
1125	  However, using more entries will allow mapping more low memory.  This
1126	  can be useful in optimizing the layout of kernel virtual memory.
1127
1128	  Say N here unless you know what you are doing.
1129
1130config LOWMEM_CAM_NUM
1131	depends on FSL_BOOKE
1132	int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1133	default 3 if !STRICT_KERNEL_RWX
1134	default 9 if DATA_SHIFT >= 24
1135	default 12 if DATA_SHIFT >= 22
1136	default 15
1137
1138config DYNAMIC_MEMSTART
1139	bool "Enable page aligned dynamic load address for kernel"
1140	depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1141	select NONSTATIC_KERNEL
1142	help
1143	  This option enables the kernel to be loaded at any page aligned
1144	  physical address. The kernel creates a mapping from KERNELBASE to
1145	  the address where the kernel is loaded. The page size here implies
1146	  the TLB page size of the mapping for kernel on the particular platform.
1147	  Please refer to the init code for finding the TLB page size.
1148
1149	  DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1150	  kernel image, where the only restriction is the page aligned kernel
1151	  load address. When this option is enabled, the compile time physical
1152	  address CONFIG_PHYSICAL_START is ignored.
1153
1154	  This option is overridden by CONFIG_RELOCATABLE
1155
1156config PAGE_OFFSET_BOOL
1157	bool "Set custom page offset address"
1158	depends on ADVANCED_OPTIONS
1159	help
1160	  This option allows you to set the kernel virtual address at which
1161	  the kernel will map low memory.  This can be useful in optimizing
1162	  the virtual memory layout of the system.
1163
1164	  Say N here unless you know what you are doing.
1165
1166config PAGE_OFFSET
1167	hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1168	default "0xc0000000"
1169
1170config KERNEL_START_BOOL
1171	bool "Set custom kernel base address"
1172	depends on ADVANCED_OPTIONS
1173	help
1174	  This option allows you to set the kernel virtual address at which
1175	  the kernel will be loaded.  Normally this should match PAGE_OFFSET
1176	  however there are times (like kdump) that one might not want them
1177	  to be the same.
1178
1179	  Say N here unless you know what you are doing.
1180
1181config KERNEL_START
1182	hex "Virtual address of kernel base" if KERNEL_START_BOOL
1183	default PAGE_OFFSET if PAGE_OFFSET_BOOL
1184	default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1185	default "0xc0000000"
1186
1187config PHYSICAL_START_BOOL
1188	bool "Set physical address where the kernel is loaded"
1189	depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1190	help
1191	  This gives the physical address where the kernel is loaded.
1192
1193	  Say N here unless you know what you are doing.
1194
1195config PHYSICAL_START
1196	hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1197	default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1198	default "0x00000000"
1199
1200config PHYSICAL_ALIGN
1201	hex
1202	default "0x04000000" if FSL_BOOKE
1203	help
1204	  This value puts the alignment restrictions on physical address
1205	  where kernel is loaded and run from. Kernel is compiled for an
1206	  address which meets above alignment restriction.
1207
1208config TASK_SIZE_BOOL
1209	bool "Set custom user task size"
1210	depends on ADVANCED_OPTIONS
1211	help
1212	  This option allows you to set the amount of virtual address space
1213	  allocated to user tasks.  This can be useful in optimizing the
1214	  virtual memory layout of the system.
1215
1216	  Say N here unless you know what you are doing.
1217
1218config TASK_SIZE
1219	hex "Size of user task space" if TASK_SIZE_BOOL
1220	default "0x80000000" if PPC_8xx
1221	default "0xb0000000" if PPC_BOOK3S_32
1222	default "0xc0000000"
1223endmenu
1224
1225if PPC64
1226# This value must have zeroes in the bottom 60 bits otherwise lots will break
1227config PAGE_OFFSET
1228	hex
1229	default "0xc000000000000000"
1230config KERNEL_START
1231	hex
1232	default "0xc000000000000000"
1233config PHYSICAL_START
1234	hex
1235	default "0x00000000"
1236endif
1237
1238config	ARCH_RANDOM
1239	def_bool n
1240
1241config PPC_LIB_RHEAP
1242	bool
1243
1244source "arch/powerpc/kvm/Kconfig"
1245
1246source "kernel/livepatch/Kconfig"
1247