| blob | c7f120aaa98fe0d21ebbdff7186b32c7547a5ac8 |
1 source "arch/powerpc/platforms/Kconfig.cputype"
3 config PPC32
4 bool
5 default y if !PPC64
7 config 32BIT
8 bool
9 default y if PPC32
11 config 64BIT
12 bool
13 default y if PPC64
15 config ARCH_PHYS_ADDR_T_64BIT
16 def_bool PPC64 || PHYS_64BIT
18 config ARCH_DMA_ADDR_T_64BIT
19 def_bool ARCH_PHYS_ADDR_T_64BIT
21 config MMU
22 bool
23 default y
25 config HAVE_SETUP_PER_CPU_AREA
26 def_bool PPC64
28 config NEED_PER_CPU_EMBED_FIRST_CHUNK
29 def_bool PPC64
31 config NR_IRQS
32 int "Number of virtual interrupt numbers"
33 range 32 32768
34 default "512"
35 help
36 This defines the number of virtual interrupt numbers the kernel
37 can manage. Virtual interrupt numbers are what you see in
38 /proc/interrupts. If you configure your system to have too few,
39 drivers will fail to load or worse - handle with care.
41 config STACKTRACE_SUPPORT
42 bool
43 default y
45 config TRACE_IRQFLAGS_SUPPORT
46 bool
47 default y
49 config LOCKDEP_SUPPORT
50 bool
51 default y
53 config RWSEM_GENERIC_SPINLOCK
54 bool
56 config RWSEM_XCHGADD_ALGORITHM
57 bool
58 default y
60 config GENERIC_LOCKBREAK
61 bool
62 default y
63 depends on SMP && PREEMPT
65 config ARCH_HAS_ILOG2_U32
66 bool
67 default y
69 config ARCH_HAS_ILOG2_U64
70 bool
71 default y if 64BIT
73 config GENERIC_HWEIGHT
74 bool
75 default y
77 config ARCH_HAS_DMA_SET_COHERENT_MASK
78 bool
80 config PPC
81 bool
82 default y
83 select ARCH_MIGHT_HAVE_PC_PARPORT
84 select ARCH_MIGHT_HAVE_PC_SERIO
85 select BINFMT_ELF
86 select ARCH_HAS_ELF_RANDOMIZE
87 select OF
88 select OF_EARLY_FLATTREE
89 select OF_RESERVED_MEM
90 select HAVE_FTRACE_MCOUNT_RECORD
91 select HAVE_DYNAMIC_FTRACE
92 select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
93 select HAVE_FUNCTION_TRACER
94 select HAVE_FUNCTION_GRAPH_TRACER
95 select SYSCTL_EXCEPTION_TRACE
96 select VIRT_TO_BUS if !PPC64
97 select HAVE_IDE
98 select HAVE_IOREMAP_PROT
99 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
100 select HAVE_KPROBES
101 select HAVE_ARCH_KGDB
102 select HAVE_KRETPROBES
103 select HAVE_ARCH_TRACEHOOK
104 select HAVE_MEMBLOCK
105 select HAVE_MEMBLOCK_NODE_MAP
106 select HAVE_DMA_API_DEBUG
107 select HAVE_OPROFILE
108 select HAVE_DEBUG_KMEMLEAK
109 select ARCH_HAS_SG_CHAIN
110 select GENERIC_ATOMIC64 if PPC32
111 select HAVE_PERF_EVENTS
112 select HAVE_PERF_REGS
113 select HAVE_PERF_USER_STACK_DUMP
114 select HAVE_REGS_AND_STACK_ACCESS_API
115 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
116 select ARCH_WANT_IPC_PARSE_VERSION
117 select SPARSE_IRQ
118 select IRQ_DOMAIN
119 select GENERIC_IRQ_SHOW
120 select GENERIC_IRQ_SHOW_LEVEL
121 select IRQ_FORCED_THREADING
122 select HAVE_RCU_TABLE_FREE if SMP
123 select HAVE_SYSCALL_TRACEPOINTS
124 select HAVE_CBPF_JIT if !PPC64
125 select HAVE_EBPF_JIT if PPC64
126 select HAVE_ARCH_JUMP_LABEL
127 select ARCH_HAVE_NMI_SAFE_CMPXCHG
128 select ARCH_HAS_GCOV_PROFILE_ALL
129 select GENERIC_SMP_IDLE_THREAD
130 select GENERIC_CMOS_UPDATE
131 select GENERIC_TIME_VSYSCALL_OLD
132 select GENERIC_CLOCKEVENTS
133 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
134 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
135 select GENERIC_STRNCPY_FROM_USER
136 select GENERIC_STRNLEN_USER
137 select HAVE_MOD_ARCH_SPECIFIC
138 select MODULES_USE_ELF_RELA
139 select CLONE_BACKWARDS
140 select ARCH_USE_BUILTIN_BSWAP
141 select OLD_SIGSUSPEND
142 select OLD_SIGACTION if PPC32
143 select HAVE_DEBUG_STACKOVERFLOW
144 select HAVE_IRQ_EXIT_ON_IRQ_STACK
145 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
146 select HAVE_ARCH_AUDITSYSCALL
147 select ARCH_SUPPORTS_ATOMIC_RMW
148 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
149 select NO_BOOTMEM
150 select HAVE_GENERIC_RCU_GUP
151 select HAVE_PERF_EVENTS_NMI if PPC64
152 select HAVE_NMI if PERF_EVENTS
153 select EDAC_SUPPORT
154 select EDAC_ATOMIC_SCRUB
155 select ARCH_HAS_DMA_SET_COHERENT_MASK
156 select ARCH_HAS_DEVMEM_IS_ALLOWED
157 select HAVE_ARCH_SECCOMP_FILTER
158 select ARCH_HAS_UBSAN_SANITIZE_ALL
159 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
160 select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
161 select GENERIC_CPU_AUTOPROBE
162 select HAVE_VIRT_CPU_ACCOUNTING
163 select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
164 select HAVE_ARCH_HARDENED_USERCOPY
165 select HAVE_KERNEL_GZIP
167 config GENERIC_CSUM
168 def_bool CPU_LITTLE_ENDIAN
170 config EARLY_PRINTK
171 bool
172 default y
174 config PANIC_TIMEOUT
175 int
176 default 180
178 config COMPAT
179 bool
180 default y if PPC64
181 select COMPAT_BINFMT_ELF
182 select ARCH_WANT_OLD_COMPAT_IPC
183 select COMPAT_OLD_SIGACTION
185 config SYSVIPC_COMPAT
186 bool
187 depends on COMPAT && SYSVIPC
188 default y
190 # All PPC32s use generic nvram driver through ppc_md
191 config GENERIC_NVRAM
192 bool
193 default y if PPC32
195 config SCHED_OMIT_FRAME_POINTER
196 bool
197 default y
199 config ARCH_MAY_HAVE_PC_FDC
200 bool
201 default PCI
203 config PPC_UDBG_16550
204 bool
205 default n
207 config GENERIC_TBSYNC
208 bool
209 default y if PPC32 && SMP
210 default n
212 config AUDIT_ARCH
213 bool
214 default y
216 config GENERIC_BUG
217 bool
218 default y
219 depends on BUG
221 config SYS_SUPPORTS_APM_EMULATION
222 default y if PMAC_APM_EMU
223 bool
225 config EPAPR_BOOT
226 bool
227 help
228 Used to allow a board to specify it wants an ePAPR compliant wrapper.
229 default n
231 config DEFAULT_UIMAGE
232 bool
233 help
234 Used to allow a board to specify it wants a uImage built by default
235 default n
237 config ARCH_HIBERNATION_POSSIBLE
238 bool
239 default y
241 config ARCH_SUSPEND_POSSIBLE
242 def_bool y
243 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
244 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
245 || 44x || 40x
247 config PPC_DCR_NATIVE
248 bool
249 default n
251 config PPC_DCR_MMIO
252 bool
253 default n
255 config PPC_DCR
256 bool
257 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
258 default y
260 config PPC_OF_PLATFORM_PCI
261 bool
262 depends on PCI
263 depends on PPC64 # not supported on 32 bits yet
264 default n
266 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
267 depends on PPC32 || PPC_STD_MMU_64
268 def_bool y
270 config ARCH_SUPPORTS_UPROBES
271 def_bool y
273 config PPC_ADV_DEBUG_REGS
274 bool
275 depends on 40x || BOOKE
276 default y
278 config PPC_ADV_DEBUG_IACS
279 int
280 depends on PPC_ADV_DEBUG_REGS
281 default 4 if 44x
282 default 2
284 config PPC_ADV_DEBUG_DACS
285 int
286 depends on PPC_ADV_DEBUG_REGS
287 default 2
289 config PPC_ADV_DEBUG_DVCS
290 int
291 depends on PPC_ADV_DEBUG_REGS
292 default 2 if 44x
293 default 0
295 config PPC_ADV_DEBUG_DAC_RANGE
296 bool
297 depends on PPC_ADV_DEBUG_REGS && 44x
298 default y
300 config PPC_EMULATE_SSTEP
301 bool
302 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
304 config ZONE_DMA32
305 bool
306 default y if PPC64
308 config PGTABLE_LEVELS
309 int
310 default 2 if !PPC64
311 default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
312 default 4
314 source "init/Kconfig"
316 source "kernel/Kconfig.freezer"
318 source "arch/powerpc/sysdev/Kconfig"
319 source "arch/powerpc/platforms/Kconfig"
321 menu "Kernel options"
323 config HIGHMEM
324 bool "High memory support"
325 depends on PPC32
327 source kernel/Kconfig.hz
328 source kernel/Kconfig.preempt
329 source "fs/Kconfig.binfmt"
331 config HUGETLB_PAGE_SIZE_VARIABLE
332 bool
333 depends on HUGETLB_PAGE
334 default y
336 config MATH_EMULATION
337 bool "Math emulation"
338 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
339 ---help---
340 Some PowerPC chips designed for embedded applications do not have
341 a floating-point unit and therefore do not implement the
342 floating-point instructions in the PowerPC instruction set. If you
343 say Y here, the kernel will include code to emulate a floating-point
344 unit, which will allow programs that use floating-point
345 instructions to run.
347 This is also useful to emulate missing (optional) instructions
348 such as fsqrt on cores that do have an FPU but do not implement
349 them (such as Freescale BookE).
351 choice
352 prompt "Math emulation options"
353 default MATH_EMULATION_FULL
354 depends on MATH_EMULATION
356 config MATH_EMULATION_FULL
357 bool "Emulate all the floating point instructions"
358 ---help---
359 Select this option will enable the kernel to support to emulate
360 all the floating point instructions. If your SoC doesn't have
361 a FPU, you should select this.
363 config MATH_EMULATION_HW_UNIMPLEMENTED
364 bool "Just emulate the FPU unimplemented instructions"
365 ---help---
366 Select this if you know there does have a hardware FPU on your
367 SoC, but some floating point instructions are not implemented by that.
369 endchoice
371 config PPC_TRANSACTIONAL_MEM
372 bool "Transactional Memory support for POWERPC"
373 depends on PPC_BOOK3S_64
374 depends on SMP
375 select ALTIVEC
376 select VSX
377 default n
378 ---help---
379 Support user-mode Transactional Memory on POWERPC.
381 config DISABLE_MPROFILE_KERNEL
382 bool "Disable use of mprofile-kernel for kernel tracing"
383 depends on PPC64 && CPU_LITTLE_ENDIAN
384 default y
385 help
386 Selecting this options disables use of the mprofile-kernel ABI for
387 kernel tracing. That will cause options such as live patching
388 (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
389 be disabled also.
391 If you have a toolchain which supports mprofile-kernel, then you can
392 enable this. Otherwise leave it disabled. If you're not sure, say
393 "N".
395 config MPROFILE_KERNEL
396 depends on PPC64 && CPU_LITTLE_ENDIAN
397 def_bool !DISABLE_MPROFILE_KERNEL
399 config IOMMU_HELPER
400 def_bool PPC64
402 config SWIOTLB
403 bool "SWIOTLB support"
404 default n
405 select IOMMU_HELPER
406 ---help---
407 Support for IO bounce buffering for systems without an IOMMU.
408 This allows us to DMA to the full physical address space on
409 platforms where the size of a physical address is larger
410 than the bus address. Not all platforms support this.
412 config HOTPLUG_CPU
413 bool "Support for enabling/disabling CPUs"
414 depends on SMP && (PPC_PSERIES || \
415 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
416 ---help---
417 Say Y here to be able to disable and re-enable individual
418 CPUs at runtime on SMP machines.
420 Say N if you are unsure.
422 config ARCH_CPU_PROBE_RELEASE
423 def_bool y
424 depends on HOTPLUG_CPU
426 config ARCH_ENABLE_MEMORY_HOTPLUG
427 def_bool y
429 config ARCH_HAS_WALK_MEMORY
430 def_bool y
432 config ARCH_ENABLE_MEMORY_HOTREMOVE
433 def_bool y
435 config PPC64_SUPPORTS_MEMORY_FAILURE
436 bool "Add support for memory hwpoison"
437 depends on PPC_BOOK3S_64
438 default "y" if PPC_POWERNV
439 select ARCH_SUPPORTS_MEMORY_FAILURE
441 config KEXEC
442 bool "kexec system call"
443 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
444 select KEXEC_CORE
445 help
446 kexec is a system call that implements the ability to shutdown your
447 current kernel, and to start another kernel. It is like a reboot
448 but it is independent of the system firmware. And like a reboot
449 you can start any kernel with it, not just Linux.
451 The name comes from the similarity to the exec system call.
453 It is an ongoing process to be certain the hardware in a machine
454 is properly shutdown, so do not be surprised if this code does not
455 initially work for you. As of this writing the exact hardware
456 interface is strongly in flux, so no good recommendation can be
457 made.
459 config RELOCATABLE
460 bool "Build a relocatable kernel"
461 depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
462 select NONSTATIC_KERNEL
463 help
464 This builds a kernel image that is capable of running at the
465 location the kernel is loaded at. For ppc32, there is no any
466 alignment restrictions, and this feature is a superset of
467 DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
468 16k-aligned base address. The kernel is linked as a
469 position-independent executable (PIE) and contains dynamic relocations
470 which are processed early in the bootup process.
472 One use is for the kexec on panic case where the recovery kernel
473 must live at a different physical address than the primary
474 kernel.
476 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
477 it has been loaded at and the compile time physical addresses
478 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
479 setting can still be useful to bootwrappers that need to know the
480 load address of the kernel (eg. u-boot/mkimage).
482 config CRASH_DUMP
483 bool "Build a kdump crash kernel"
484 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
485 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
486 help
487 Build a kernel suitable for use as a kdump capture kernel.
488 The same kernel binary can be used as production kernel and dump
489 capture kernel.
491 config FA_DUMP
492 bool "Firmware-assisted dump"
493 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
494 help
495 A robust mechanism to get reliable kernel crash dump with
496 assistance from firmware. This approach does not use kexec,
497 instead firmware assists in booting the kdump kernel
498 while preserving memory contents. Firmware-assisted dump
499 is meant to be a kdump replacement offering robustness and
500 speed not possible without system firmware assistance.
502 If unsure, say "N"
504 config IRQ_ALL_CPUS
505 bool "Distribute interrupts on all CPUs by default"
506 depends on SMP
507 help
508 This option gives the kernel permission to distribute IRQs across
509 multiple CPUs. Saying N here will route all IRQs to the first
510 CPU. Generally saying Y is safe, although some problems have been
511 reported with SMP Power Macintoshes with this option enabled.
513 config NUMA
514 bool "NUMA support"
515 depends on PPC64
516 default y if SMP && PPC_PSERIES
518 config NODES_SHIFT
519 int
520 default "8" if PPC64
521 default "4"
522 depends on NEED_MULTIPLE_NODES
524 config USE_PERCPU_NUMA_NODE_ID
525 def_bool y
526 depends on NUMA
528 config HAVE_MEMORYLESS_NODES
529 def_bool y
530 depends on NUMA
532 config ARCH_SELECT_MEMORY_MODEL
533 def_bool y
534 depends on PPC64
536 config ARCH_FLATMEM_ENABLE
537 def_bool y
538 depends on (PPC64 && !NUMA) || PPC32
540 config ARCH_SPARSEMEM_ENABLE
541 def_bool y
542 depends on PPC64
543 select SPARSEMEM_VMEMMAP_ENABLE
545 config ARCH_SPARSEMEM_DEFAULT
546 def_bool y
547 depends on (SMP && PPC_PSERIES) || PPC_PS3
549 config SYS_SUPPORTS_HUGETLBFS
550 bool
552 source "mm/Kconfig"
554 config ARCH_MEMORY_PROBE
555 def_bool y
556 depends on MEMORY_HOTPLUG
558 # Some NUMA nodes have memory ranges that span
559 # other nodes. Even though a pfn is valid and
560 # between a node's start and end pfns, it may not
561 # reside on that node. See memmap_init_zone()
562 # for details.
563 config NODES_SPAN_OTHER_NODES
564 def_bool y
565 depends on NEED_MULTIPLE_NODES
567 config STDBINUTILS
568 bool "Using standard binutils settings"
569 depends on 44x
570 default y
571 help
572 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
573 Note, that kernel will be able to run only those applications,
574 which had been compiled using binutils later than 2.17.50.0.3 with
575 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
576 the older binutils, you can patch them with a trivial patch, which
577 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
579 choice
580 prompt "Page size"
581 default PPC_4K_PAGES
582 help
583 Select the kernel logical page size. Increasing the page size
584 will reduce software overhead at each page boundary, allow
585 hardware prefetch mechanisms to be more effective, and allow
586 larger dma transfers increasing IO efficiency and reducing
587 overhead. However the utilization of memory will increase.
588 For example, each cached file will using a multiple of the
589 page size to hold its contents and the difference between the
590 end of file and the end of page is wasted.
592 Some dedicated systems, such as software raid serving with
593 accelerated calculations, have shown significant increases.
595 If you configure a 64 bit kernel for 64k pages but the
596 processor does not support them, then the kernel will simulate
597 them with 4k pages, loading them on demand, but with the
598 reduced software overhead and larger internal fragmentation.
599 For the 32 bit kernel, a large page option will not be offered
600 unless it is supported by the configured processor.
602 If unsure, choose 4K_PAGES.
604 config PPC_4K_PAGES
605 bool "4k page size"
606 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
608 config PPC_16K_PAGES
609 bool "16k page size"
610 depends on 44x || PPC_8xx
612 config PPC_64K_PAGES
613 bool "64k page size"
614 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
615 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
617 config PPC_256K_PAGES
618 bool "256k page size"
619 depends on 44x && !STDBINUTILS
620 help
621 Make the page size 256k.
623 As the ELF standard only requires alignment to support page
624 sizes up to 64k, you will need to compile all of your user
625 space applications with a non-standard binutils settings
626 (see the STDBINUTILS description for details).
628 Say N unless you know what you are doing.
630 endchoice
632 config FORCE_MAX_ZONEORDER
633 int "Maximum zone order"
634 range 8 9 if PPC64 && PPC_64K_PAGES
635 default "9" if PPC64 && PPC_64K_PAGES
636 range 13 13 if PPC64 && !PPC_64K_PAGES
637 default "13" if PPC64 && !PPC_64K_PAGES
638 range 9 64 if PPC32 && PPC_16K_PAGES
639 default "9" if PPC32 && PPC_16K_PAGES
640 range 7 64 if PPC32 && PPC_64K_PAGES
641 default "7" if PPC32 && PPC_64K_PAGES
642 range 5 64 if PPC32 && PPC_256K_PAGES
643 default "5" if PPC32 && PPC_256K_PAGES
644 range 11 64
645 default "11"
646 help
647 The kernel memory allocator divides physically contiguous memory
648 blocks into "zones", where each zone is a power of two number of
649 pages. This option selects the largest power of two that the kernel
650 keeps in the memory allocator. If you need to allocate very large
651 blocks of physically contiguous memory, then you may need to
652 increase this value.
654 This config option is actually maximum order plus one. For example,
655 a value of 11 means that the largest free memory block is 2^10 pages.
657 The page size is not necessarily 4KB. For example, on 64-bit
658 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
659 this in mind when choosing a value for this option.
661 config PPC_SUBPAGE_PROT
662 bool "Support setting protections for 4k subpages"
663 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
664 help
665 This option adds support for a system call to allow user programs
666 to set access permissions (read/write, readonly, or no access)
667 on the 4k subpages of each 64k page.
669 config PPC_COPRO_BASE
670 bool
671 default n
673 config SCHED_SMT
674 bool "SMT (Hyperthreading) scheduler support"
675 depends on PPC64 && SMP
676 help
677 SMT scheduler support improves the CPU scheduler's decision making
678 when dealing with POWER5 cpus at a cost of slightly increased
679 overhead in some places. If unsure say N here.
681 config PPC_DENORMALISATION
682 bool "PowerPC denormalisation exception handling"
683 depends on PPC_BOOK3S_64
684 default "y" if PPC_POWERNV
685 ---help---
686 Add support for handling denormalisation of single precision
687 values. Useful for bare metal only. If unsure say Y here.
689 config CMDLINE_BOOL
690 bool "Default bootloader kernel arguments"
692 config CMDLINE
693 string "Initial kernel command string"
694 depends on CMDLINE_BOOL
695 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
696 help
697 On some platforms, there is currently no way for the boot loader to
698 pass arguments to the kernel. For these platforms, you can supply
699 some command-line options at build time by entering them here. In
700 most cases you will need to specify the root device here.
702 config CMDLINE_FORCE
703 bool "Always use the default kernel command string"
704 depends on CMDLINE_BOOL
705 help
706 Always use the default kernel command string, even if the boot
707 loader passes other arguments to the kernel.
708 This is useful if you cannot or don't want to change the
709 command-line options your boot loader passes to the kernel.
711 config EXTRA_TARGETS
712 string "Additional default image types"
713 help
714 List additional targets to be built by the bootwrapper here (separated
715 by spaces). This is useful for targets that depend of device tree
716 files in the .dts directory.
718 Targets in this list will be build as part of the default build
719 target, or when the user does a 'make zImage' or a
720 'make zImage.initrd'.
722 If unsure, leave blank
724 config ARCH_WANTS_FREEZER_CONTROL
725 def_bool y
726 depends on ADB_PMU
728 source kernel/power/Kconfig
730 config SECCOMP
731 bool "Enable seccomp to safely compute untrusted bytecode"
732 depends on PROC_FS
733 default y
734 help
735 This kernel feature is useful for number crunching applications
736 that may need to compute untrusted bytecode during their
737 execution. By using pipes or other transports made available to
738 the process as file descriptors supporting the read/write
739 syscalls, it's possible to isolate those applications in
740 their own address space using seccomp. Once seccomp is
741 enabled via /proc/<pid>/seccomp, it cannot be disabled
742 and the task is only allowed to execute a few safe syscalls
743 defined by each seccomp mode.
745 If unsure, say Y. Only embedded should say N here.
747 endmenu
749 config ISA_DMA_API
750 bool
751 default PCI
753 menu "Bus options"
755 config ISA
756 bool "Support for ISA-bus hardware"
757 depends on PPC_CHRP
758 select PPC_I8259
759 help
760 Find out whether you have ISA slots on your motherboard. ISA is the
761 name of a bus system, i.e. the way the CPU talks to the other stuff
762 inside your box. If you have an Apple machine, say N here; if you
763 have an IBM RS/6000 or pSeries machine, say Y. If you have an
764 embedded board, consult your board documentation.
766 config ZONE_DMA
767 bool
768 default y
770 config NEED_DMA_MAP_STATE
771 def_bool (PPC64 || NOT_COHERENT_CACHE)
773 config NEED_SG_DMA_LENGTH
774 def_bool y
776 config GENERIC_ISA_DMA
777 bool
778 depends on ISA_DMA_API
779 default y
781 config PPC_INDIRECT_PCI
782 bool
783 depends on PCI
784 default y if 40x || 44x
785 default n
787 config EISA
788 bool
790 config SBUS
791 bool
793 config FSL_SOC
794 bool
796 config FSL_PCI
797 bool
798 select PPC_INDIRECT_PCI
799 select PCI_QUIRKS
801 config FSL_PMC
802 bool
803 default y
804 depends on SUSPEND && (PPC_85xx || PPC_86xx)
805 help
806 Freescale MPC85xx/MPC86xx power management controller support
807 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
809 config PPC4xx_CPM
810 bool
811 default y
812 depends on SUSPEND && (44x || 40x)
813 help
814 PPC4xx Clock Power Management (CPM) support (suspend/resume).
815 It also enables support for two different idle states (idle-wait
816 and idle-doze).
818 config 4xx_SOC
819 bool
821 config FSL_LBC
822 bool "Freescale Local Bus support"
823 help
824 Enables reporting of errors from the Freescale local bus
825 controller. Also contains some common code used by
826 drivers for specific local bus peripherals.
828 config FSL_GTM
829 bool
830 depends on PPC_83xx || QUICC_ENGINE || CPM2
831 help
832 Freescale General-purpose Timers support
834 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
835 config MCA
836 bool
838 # Platforms that what PCI turned unconditionally just do select PCI
839 # in their config node. Platforms that want to choose at config
840 # time should select PPC_PCI_CHOICE
841 config PPC_PCI_CHOICE
842 bool
844 config PCI
845 bool "PCI support" if PPC_PCI_CHOICE
846 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
847 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
848 default PCI_QSPAN if !4xx && !CPM2 && 8xx
849 select GENERIC_PCI_IOMAP
850 help
851 Find out whether your system includes a PCI bus. PCI is the name of
852 a bus system, i.e. the way the CPU talks to the other stuff inside
853 your box. If you say Y here, the kernel will include drivers and
854 infrastructure code to support PCI bus devices.
856 config PCI_DOMAINS
857 def_bool PCI
859 config PCI_SYSCALL
860 def_bool PCI
862 config PCI_QSPAN
863 bool "QSpan PCI"
864 depends on !4xx && !CPM2 && 8xx
865 select PPC_I8259
866 help
867 Say Y here if you have a system based on a Motorola 8xx-series
868 embedded processor with a QSPAN PCI interface, otherwise say N.
870 config PCI_8260
871 bool
872 depends on PCI && 8260
873 select PPC_INDIRECT_PCI
874 default y
876 source "drivers/pci/Kconfig"
878 source "drivers/pcmcia/Kconfig"
880 config HAS_RAPIDIO
881 bool
882 default n
884 config RAPIDIO
885 tristate "RapidIO support"
886 depends on HAS_RAPIDIO || PCI
887 help
888 If you say Y here, the kernel will include drivers and
889 infrastructure code to support RapidIO interconnect devices.
891 config FSL_RIO
892 bool "Freescale Embedded SRIO Controller support"
893 depends on RAPIDIO = y && HAS_RAPIDIO
894 default "n"
895 ---help---
896 Include support for RapidIO controller on Freescale embedded
897 processors (MPC8548, MPC8641, etc).
899 source "drivers/rapidio/Kconfig"
901 endmenu
903 config NONSTATIC_KERNEL
904 bool
905 default n
907 menu "Advanced setup"
908 depends on PPC32
910 config ADVANCED_OPTIONS
911 bool "Prompt for advanced kernel configuration options"
912 help
913 This option will enable prompting for a variety of advanced kernel
914 configuration options. These options can cause the kernel to not
915 work if they are set incorrectly, but can be used to optimize certain
916 aspects of kernel memory management.
918 Unless you know what you are doing, say N here.
920 comment "Default settings for advanced configuration options are used"
921 depends on !ADVANCED_OPTIONS
923 config LOWMEM_SIZE_BOOL
924 bool "Set maximum low memory"
925 depends on ADVANCED_OPTIONS
926 help
927 This option allows you to set the maximum amount of memory which
928 will be used as "low memory", that is, memory which the kernel can
929 access directly, without having to set up a kernel virtual mapping.
930 This can be useful in optimizing the layout of kernel virtual
931 memory.
933 Say N here unless you know what you are doing.
935 config LOWMEM_SIZE
936 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
937 default "0x30000000"
939 config LOWMEM_CAM_NUM_BOOL
940 bool "Set number of CAMs to use to map low memory"
941 depends on ADVANCED_OPTIONS && FSL_BOOKE
942 help
943 This option allows you to set the maximum number of CAM slots that
944 will be used to map low memory. There are a limited number of slots
945 available and even more limited number that will fit in the L1 MMU.
946 However, using more entries will allow mapping more low memory. This
947 can be useful in optimizing the layout of kernel virtual memory.
949 Say N here unless you know what you are doing.
951 config LOWMEM_CAM_NUM
952 depends on FSL_BOOKE
953 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
954 default 3
956 config DYNAMIC_MEMSTART
957 bool "Enable page aligned dynamic load address for kernel"
958 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
959 select NONSTATIC_KERNEL
960 help
961 This option enables the kernel to be loaded at any page aligned
962 physical address. The kernel creates a mapping from KERNELBASE to
963 the address where the kernel is loaded. The page size here implies
964 the TLB page size of the mapping for kernel on the particular platform.
965 Please refer to the init code for finding the TLB page size.
967 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
968 kernel image, where the only restriction is the page aligned kernel
969 load address. When this option is enabled, the compile time physical
970 address CONFIG_PHYSICAL_START is ignored.
972 This option is overridden by CONFIG_RELOCATABLE
974 config PAGE_OFFSET_BOOL
975 bool "Set custom page offset address"
976 depends on ADVANCED_OPTIONS
977 help
978 This option allows you to set the kernel virtual address at which
979 the kernel will map low memory. This can be useful in optimizing
980 the virtual memory layout of the system.
982 Say N here unless you know what you are doing.
984 config PAGE_OFFSET
985 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
986 default "0xc0000000"
988 config KERNEL_START_BOOL
989 bool "Set custom kernel base address"
990 depends on ADVANCED_OPTIONS
991 help
992 This option allows you to set the kernel virtual address at which
993 the kernel will be loaded. Normally this should match PAGE_OFFSET
994 however there are times (like kdump) that one might not want them
995 to be the same.
997 Say N here unless you know what you are doing.
999 config KERNEL_START
1000 hex "Virtual address of kernel base" if KERNEL_START_BOOL
1001 default PAGE_OFFSET if PAGE_OFFSET_BOOL
1002 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1003 default "0xc0000000"
1005 config PHYSICAL_START_BOOL
1006 bool "Set physical address where the kernel is loaded"
1007 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1008 help
1009 This gives the physical address where the kernel is loaded.
1011 Say N here unless you know what you are doing.
1013 config PHYSICAL_START
1014 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1015 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1016 default "0x00000000"
1018 config PHYSICAL_ALIGN
1019 hex
1020 default "0x04000000" if FSL_BOOKE
1021 help
1022 This value puts the alignment restrictions on physical address
1023 where kernel is loaded and run from. Kernel is compiled for an
1024 address which meets above alignment restriction.
1026 config TASK_SIZE_BOOL
1027 bool "Set custom user task size"
1028 depends on ADVANCED_OPTIONS
1029 help
1030 This option allows you to set the amount of virtual address space
1031 allocated to user tasks. This can be useful in optimizing the
1032 virtual memory layout of the system.
1034 Say N here unless you know what you are doing.
1036 config TASK_SIZE
1037 hex "Size of user task space" if TASK_SIZE_BOOL
1038 default "0x80000000" if PPC_8xx
1039 default "0xc0000000"
1041 config CONSISTENT_SIZE_BOOL
1042 bool "Set custom consistent memory pool size"
1043 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1044 help
1045 This option allows you to set the size of the
1046 consistent memory pool. This pool of virtual memory
1047 is used to make consistent memory allocations.
1049 config CONSISTENT_SIZE
1050 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1051 default "0x00200000" if NOT_COHERENT_CACHE
1053 config PIN_TLB
1054 bool "Pinned Kernel TLBs (860 ONLY)"
1055 depends on ADVANCED_OPTIONS && 8xx
1057 config PIN_TLB_IMMR
1058 bool "Pinned TLB for IMMR"
1059 depends on PIN_TLB
1060 default y
1061 endmenu
1063 if PPC64
1064 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1065 config PAGE_OFFSET
1066 hex
1067 default "0xc000000000000000"
1068 config KERNEL_START
1069 hex
1070 default "0xc000000000000000"
1071 config PHYSICAL_START
1072 hex
1073 default "0x00000000"
1074 endif
1076 config ARCH_RANDOM
1077 def_bool n
1079 source "net/Kconfig"
1081 source "drivers/Kconfig"
1083 source "fs/Kconfig"
1085 source "lib/Kconfig"
1087 source "arch/powerpc/Kconfig.debug"
1089 source "security/Kconfig"
1091 config KEYS_COMPAT
1092 bool
1093 depends on COMPAT && KEYS
1094 default y
1096 source "crypto/Kconfig"
1098 config PPC_LIB_RHEAP
1099 bool
1101 source "arch/powerpc/kvm/Kconfig"
1103 source "kernel/livepatch/Kconfig"