Kconfig: clean up the long arch list for the DEBUG_BUGVERBOSE config option
[deliverable/linux.git] / arch / tile / Kconfig
1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
3
4 config TILE
5 def_bool y
6 select HAVE_DMA_ATTRS
7 select HAVE_DMA_API_DEBUG
8 select HAVE_KVM if !TILEGX
9 select GENERIC_FIND_FIRST_BIT
10 select USE_GENERIC_SMP_HELPERS
11 select CC_OPTIMIZE_FOR_SIZE
12 select HAVE_DEBUG_KMEMLEAK
13 select HAVE_GENERIC_HARDIRQS
14 select GENERIC_IRQ_PROBE
15 select GENERIC_PENDING_IRQ if SMP
16 select GENERIC_IRQ_SHOW
17 select HAVE_DEBUG_BUGVERBOSE
18 select HAVE_SYSCALL_WRAPPERS if TILEGX
19 select SYS_HYPERVISOR
20 select ARCH_HAVE_NMI_SAFE_CMPXCHG
21 select GENERIC_CLOCKEVENTS
22
23 # FIXME: investigate whether we need/want these options.
24 # select HAVE_IOREMAP_PROT
25 # select HAVE_OPTPROBES
26 # select HAVE_REGS_AND_STACK_ACCESS_API
27 # select HAVE_HW_BREAKPOINT
28 # select PERF_EVENTS
29 # select HAVE_USER_RETURN_NOTIFIER
30 # config NO_BOOTMEM
31 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
32 # config HUGETLB_PAGE_SIZE_VARIABLE
33
34 config MMU
35 def_bool y
36
37 config GENERIC_CSUM
38 def_bool y
39
40 config SEMAPHORE_SLEEPERS
41 def_bool y
42
43 config HAVE_ARCH_ALLOC_REMAP
44 def_bool y
45
46 config HAVE_SETUP_PER_CPU_AREA
47 def_bool y
48
49 config NEED_PER_CPU_PAGE_FIRST_CHUNK
50 def_bool y
51
52 config SYS_SUPPORTS_HUGETLBFS
53 def_bool y
54
55 # Support for additional huge page sizes besides HPAGE_SIZE.
56 # The software support is currently only present in the TILE-Gx
57 # hypervisor. TILEPro in any case does not support page sizes
58 # larger than the default HPAGE_SIZE.
59 config HUGETLB_SUPER_PAGES
60 depends on HUGETLB_PAGE && TILEGX
61 def_bool y
62
63 # FIXME: tilegx can implement a more efficient rwsem.
64 config RWSEM_GENERIC_SPINLOCK
65 def_bool y
66
67 # We have a very flat architecture from a migration point of view,
68 # so save boot time by presetting this (particularly useful on tile-sim).
69 config DEFAULT_MIGRATION_COST
70 int
71 default "10000000"
72
73 # We only support gcc 4.4 and above, so this should work.
74 config ARCH_SUPPORTS_OPTIMIZED_INLINING
75 def_bool y
76
77 config ARCH_PHYS_ADDR_T_64BIT
78 def_bool y
79
80 config ARCH_DMA_ADDR_T_64BIT
81 def_bool y
82
83 config NEED_DMA_MAP_STATE
84 def_bool y
85
86 config ARCH_HAS_DMA_SET_COHERENT_MASK
87 bool
88
89 config LOCKDEP_SUPPORT
90 def_bool y
91
92 config STACKTRACE_SUPPORT
93 def_bool y
94 select STACKTRACE
95
96 # We use discontigmem for now; at some point we may want to switch
97 # to sparsemem (Tilera bug 7996).
98 config ARCH_DISCONTIGMEM_ENABLE
99 def_bool y
100
101 config ARCH_DISCONTIGMEM_DEFAULT
102 def_bool y
103
104 config TRACE_IRQFLAGS_SUPPORT
105 def_bool y
106
107 config STRICT_DEVMEM
108 def_bool y
109
110 # SMP is required for Tilera Linux.
111 config SMP
112 def_bool y
113
114 # Allow checking for compile-time determined overflow errors in
115 # copy_from_user(). There are still unprovable places in the
116 # generic code as of 2.6.34, so this option is not really compatible
117 # with -Werror, which is more useful in general.
118 config DEBUG_COPY_FROM_USER
119 def_bool n
120
121 config HVC_TILE
122 select HVC_DRIVER
123 def_bool y
124
125 config TILEGX
126 bool "Building with TILE-Gx (64-bit) compiler and toolchain"
127
128 config TILEPRO
129 def_bool !TILEGX
130
131 config 64BIT
132 def_bool TILEGX
133
134 config ARCH_DEFCONFIG
135 string
136 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
137 default "arch/tile/configs/tilegx_defconfig" if TILEGX
138
139 source "init/Kconfig"
140
141 menu "Tilera-specific configuration"
142
143 config NR_CPUS
144 int "Maximum number of tiles (2-255)"
145 range 2 255
146 depends on SMP
147 default "64"
148 ---help---
149 Building with 64 is the recommended value, but a slightly
150 smaller kernel memory footprint results from using a smaller
151 value on chips with fewer tiles.
152
153 if TILEGX
154
155 choice
156 prompt "Kernel page size"
157 default PAGE_SIZE_64KB
158 help
159 This lets you select the page size of the kernel. For best
160 performance on memory-intensive applications, a page size of 64KB
161 is recommended. For workloads involving many small files, many
162 connections, etc., it may be better to select 16KB, which uses
163 memory more efficiently at some cost in TLB performance.
164
165 Note that this option is TILE-Gx specific; currently
166 TILEPro page size is set by rebuilding the hypervisor.
167
168 config PAGE_SIZE_16KB
169 bool "16KB"
170
171 config PAGE_SIZE_64KB
172 bool "64KB"
173
174 endchoice
175
176 endif
177
178 source "kernel/Kconfig.hz"
179
180 config KEXEC
181 bool "kexec system call"
182 ---help---
183 kexec is a system call that implements the ability to shutdown your
184 current kernel, and to start another kernel. It is like a reboot
185 but it is independent of the system firmware. It is used
186 to implement the "mboot" Tilera booter.
187
188 The name comes from the similarity to the exec system call.
189
190 config COMPAT
191 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
192 depends on TILEGX
193 select COMPAT_BINFMT_ELF
194 default y
195 ---help---
196 If enabled, the kernel will support running TILE-Gx binaries
197 that were built with the -m32 option.
198
199 config SYSVIPC_COMPAT
200 def_bool y
201 depends on COMPAT && SYSVIPC
202
203 # We do not currently support disabling HIGHMEM on tile64 and tilepro.
204 config HIGHMEM
205 bool # "Support for more than 512 MB of RAM"
206 default !TILEGX
207 ---help---
208 Linux can use the full amount of RAM in the system by
209 default. However, the address space of TILE processors is
210 only 4 Gigabytes large. That means that, if you have a large
211 amount of physical memory, not all of it can be "permanently
212 mapped" by the kernel. The physical memory that's not
213 permanently mapped is called "high memory".
214
215 If you are compiling a kernel which will never run on a
216 machine with more than 512 MB total physical RAM, answer
217 "false" here. This will result in the kernel mapping all of
218 physical memory into the top 1 GB of virtual memory space.
219
220 If unsure, say "true".
221
222 config ZONE_DMA
223 def_bool y
224
225 config IOMMU_HELPER
226 bool
227
228 config NEED_SG_DMA_LENGTH
229 bool
230
231 config SWIOTLB
232 bool
233 default TILEGX
234 select IOMMU_HELPER
235 select NEED_SG_DMA_LENGTH
236 select ARCH_HAS_DMA_SET_COHERENT_MASK
237
238 # We do not currently support disabling NUMA.
239 config NUMA
240 bool # "NUMA Memory Allocation and Scheduler Support"
241 depends on SMP && DISCONTIGMEM
242 default y
243 ---help---
244 NUMA memory allocation is required for TILE processors
245 unless booting with memory striping enabled in the
246 hypervisor, or with only a single memory controller.
247 It is recommended that this option always be enabled.
248
249 config NODES_SHIFT
250 int "Log base 2 of the max number of memory controllers"
251 default 2
252 depends on NEED_MULTIPLE_NODES
253 ---help---
254 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
255 In a system with more controllers, this value should be raised.
256
257 choice
258 depends on !TILEGX
259 prompt "Memory split" if EXPERT
260 default VMSPLIT_3G
261 ---help---
262 Select the desired split between kernel and user memory.
263
264 If the address range available to the kernel is less than the
265 physical memory installed, the remaining memory will be available
266 as "high memory". Accessing high memory is a little more costly
267 than low memory, as it needs to be mapped into the kernel first.
268 Note that increasing the kernel address space limits the range
269 available to user programs, making the address space there
270 tighter. Selecting anything other than the default 3G/1G split
271 will also likely make your kernel incompatible with binary-only
272 kernel modules.
273
274 If you are not absolutely sure what you are doing, leave this
275 option alone!
276
277 config VMSPLIT_3_75G
278 bool "3.75G/0.25G user/kernel split (no kernel networking)"
279 config VMSPLIT_3_5G
280 bool "3.5G/0.5G user/kernel split"
281 config VMSPLIT_3G
282 bool "3G/1G user/kernel split"
283 config VMSPLIT_2_75G
284 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
285 config VMSPLIT_2_5G
286 bool "2.5G/1.5G user/kernel split"
287 config VMSPLIT_2_25G
288 bool "2.25G/1.75G user/kernel split"
289 config VMSPLIT_2G
290 bool "2G/2G user/kernel split"
291 config VMSPLIT_1G
292 bool "1G/3G user/kernel split"
293 endchoice
294
295 config PAGE_OFFSET
296 hex
297 depends on !64BIT
298 default 0xF0000000 if VMSPLIT_3_75G
299 default 0xE0000000 if VMSPLIT_3_5G
300 default 0xB0000000 if VMSPLIT_2_75G
301 default 0xA0000000 if VMSPLIT_2_5G
302 default 0x90000000 if VMSPLIT_2_25G
303 default 0x80000000 if VMSPLIT_2G
304 default 0x40000000 if VMSPLIT_1G
305 default 0xC0000000
306
307 source "mm/Kconfig"
308
309 config CMDLINE_BOOL
310 bool "Built-in kernel command line"
311 default n
312 ---help---
313 Allow for specifying boot arguments to the kernel at
314 build time. On some systems (e.g. embedded ones), it is
315 necessary or convenient to provide some or all of the
316 kernel boot arguments with the kernel itself (that is,
317 to not rely on the boot loader to provide them.)
318
319 To compile command line arguments into the kernel,
320 set this option to 'Y', then fill in the
321 the boot arguments in CONFIG_CMDLINE.
322
323 Systems with fully functional boot loaders (e.g. mboot, or
324 if booting over PCI) should leave this option set to 'N'.
325
326 config CMDLINE
327 string "Built-in kernel command string"
328 depends on CMDLINE_BOOL
329 default ""
330 ---help---
331 Enter arguments here that should be compiled into the kernel
332 image and used at boot time. If the boot loader provides a
333 command line at boot time, it is appended to this string to
334 form the full kernel command line, when the system boots.
335
336 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
337 change this behavior.
338
339 In most cases, the command line (whether built-in or provided
340 by the boot loader) should specify the device for the root
341 file system.
342
343 config CMDLINE_OVERRIDE
344 bool "Built-in command line overrides boot loader arguments"
345 default n
346 depends on CMDLINE_BOOL
347 ---help---
348 Set this option to 'Y' to have the kernel ignore the boot loader
349 command line, and use ONLY the built-in command line.
350
351 This is used to work around broken boot loaders. This should
352 be set to 'N' under normal conditions.
353
354 config VMALLOC_RESERVE
355 hex
356 default 0x1000000
357
358 config HARDWALL
359 bool "Hardwall support to allow access to user dynamic network"
360 default y
361
362 config KERNEL_PL
363 int "Processor protection level for kernel"
364 range 1 2
365 default "1"
366 ---help---
367 This setting determines the processor protection level the
368 kernel will be built to run at. Generally you should use
369 the default value here.
370
371 source "arch/tile/gxio/Kconfig"
372
373 endmenu # Tilera-specific configuration
374
375 menu "Bus options"
376
377 config PCI
378 bool "PCI support"
379 default y
380 select PCI_DOMAINS
381 select GENERIC_PCI_IOMAP
382 select TILE_GXIO_TRIO if TILEGX
383 select ARCH_SUPPORTS_MSI if TILEGX
384 select PCI_MSI if TILEGX
385 ---help---
386 Enable PCI root complex support, so PCIe endpoint devices can
387 be attached to the Tile chip. Many, but not all, PCI devices
388 are supported under Tilera's root complex driver.
389
390 config PCI_DOMAINS
391 bool
392
393 config NO_IOMEM
394 def_bool !PCI
395
396 config NO_IOPORT
397 def_bool !PCI
398
399 source "drivers/pci/Kconfig"
400
401 config TILE_USB
402 tristate "Tilera USB host adapter support"
403 default y
404 depends on USB
405 depends on TILEGX
406 select TILE_GXIO_USB_HOST
407 ---help---
408 Provides USB host adapter support for the built-in EHCI and OHCI
409 interfaces on TILE-Gx chips.
410
411 # USB OHCI needs the bounce pool since tilegx will often have more
412 # than 4GB of memory, but we don't currently use the IOTLB to present
413 # a 32-bit address to OHCI. So we need to use a bounce pool instead.
414 config NEED_BOUNCE_POOL
415 def_bool USB_OHCI_HCD
416
417 source "drivers/pci/hotplug/Kconfig"
418
419 endmenu
420
421 menu "Executable file formats"
422
423 # only elf supported
424 config KCORE_ELF
425 def_bool y
426 depends on PROC_FS
427
428 source "fs/Kconfig.binfmt"
429
430 endmenu
431
432 source "net/Kconfig"
433
434 source "drivers/Kconfig"
435
436 source "fs/Kconfig"
437
438 source "arch/tile/Kconfig.debug"
439
440 source "security/Kconfig"
441
442 source "crypto/Kconfig"
443
444 source "lib/Kconfig"
445
446 source "arch/tile/kvm/Kconfig"
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