Commit | Line | Data |
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867e359b | 1 | # For a description of the syntax of this configuration file, |
5fb682b0 | 2 | # see Documentation/kbuild/kconfig-language.txt. |
867e359b | 3 | |
8df27406 | 4 | config TILE |
867e359b | 5 | def_bool y |
41bb38fc CM |
6 | select HAVE_DMA_ATTRS |
7 | select HAVE_DMA_API_DEBUG | |
8df27406 TG |
8 | select HAVE_KVM if !TILEGX |
9 | select GENERIC_FIND_FIRST_BIT | |
7ac57a89 | 10 | select SYSCTL_EXCEPTION_TRACE |
8df27406 TG |
11 | select USE_GENERIC_SMP_HELPERS |
12 | select CC_OPTIMIZE_FOR_SIZE | |
b69ec42b | 13 | select HAVE_DEBUG_KMEMLEAK |
8df27406 TG |
14 | select HAVE_GENERIC_HARDIRQS |
15 | select GENERIC_IRQ_PROBE | |
16 | select GENERIC_PENDING_IRQ if SMP | |
61a16741 | 17 | select GENERIC_IRQ_SHOW |
9b2a60c4 | 18 | select HAVE_DEBUG_BUGVERBOSE |
e6d9668e | 19 | select HAVE_SYSCALL_WRAPPERS if TILEGX |
887cbce0 | 20 | select HAVE_VIRT_TO_BUS |
f133ecca | 21 | select SYS_HYPERVISOR |
8d695143 | 22 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4ec008d6 | 23 | select GENERIC_CLOCKEVENTS |
786d35d4 | 24 | select MODULES_USE_ELF_RELA |
867e359b | 25 | |
8df27406 TG |
26 | # FIXME: investigate whether we need/want these options. |
27 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
28 | # select HAVE_OPTPROBES |
29 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
30 | # select HAVE_HW_BREAKPOINT | |
31 | # select PERF_EVENTS | |
32 | # select HAVE_USER_RETURN_NOTIFIER | |
33 | # config NO_BOOTMEM | |
34 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
35 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 36 | |
8df27406 | 37 | config MMU |
867e359b CM |
38 | def_bool y |
39 | ||
8df27406 | 40 | config GENERIC_CSUM |
867e359b | 41 | def_bool y |
867e359b CM |
42 | |
43 | config SEMAPHORE_SLEEPERS | |
44 | def_bool y | |
45 | ||
46 | config HAVE_ARCH_ALLOC_REMAP | |
47 | def_bool y | |
48 | ||
49 | config HAVE_SETUP_PER_CPU_AREA | |
50 | def_bool y | |
51 | ||
52 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 53 | def_bool y |
867e359b CM |
54 | |
55 | config SYS_SUPPORTS_HUGETLBFS | |
56 | def_bool y | |
57 | ||
621b1955 CM |
58 | # Support for additional huge page sizes besides HPAGE_SIZE. |
59 | # The software support is currently only present in the TILE-Gx | |
60 | # hypervisor. TILEPro in any case does not support page sizes | |
61 | # larger than the default HPAGE_SIZE. | |
62 | config HUGETLB_SUPER_PAGES | |
63 | depends on HUGETLB_PAGE && TILEGX | |
64 | def_bool y | |
65 | ||
25985edc | 66 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
67 | config RWSEM_GENERIC_SPINLOCK |
68 | def_bool y | |
69 | ||
70 | # We have a very flat architecture from a migration point of view, | |
71 | # so save boot time by presetting this (particularly useful on tile-sim). | |
72 | config DEFAULT_MIGRATION_COST | |
73 | int | |
74 | default "10000000" | |
75 | ||
76 | # We only support gcc 4.4 and above, so this should work. | |
77 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
78 | def_bool y | |
79 | ||
80 | config ARCH_PHYS_ADDR_T_64BIT | |
81 | def_bool y | |
82 | ||
d31eb519 FT |
83 | config ARCH_DMA_ADDR_T_64BIT |
84 | def_bool y | |
85 | ||
3d1e8a81 CM |
86 | config NEED_DMA_MAP_STATE |
87 | def_bool y | |
88 | ||
41bb38fc CM |
89 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
90 | bool | |
91 | ||
867e359b CM |
92 | config LOCKDEP_SUPPORT |
93 | def_bool y | |
94 | ||
95 | config STACKTRACE_SUPPORT | |
96 | def_bool y | |
97 | select STACKTRACE | |
98 | ||
99 | # We use discontigmem for now; at some point we may want to switch | |
100 | # to sparsemem (Tilera bug 7996). | |
101 | config ARCH_DISCONTIGMEM_ENABLE | |
102 | def_bool y | |
103 | ||
104 | config ARCH_DISCONTIGMEM_DEFAULT | |
105 | def_bool y | |
106 | ||
107 | config TRACE_IRQFLAGS_SUPPORT | |
108 | def_bool y | |
109 | ||
110 | config STRICT_DEVMEM | |
111 | def_bool y | |
112 | ||
113 | # SMP is required for Tilera Linux. | |
114 | config SMP | |
115 | def_bool y | |
116 | ||
117 | # Allow checking for compile-time determined overflow errors in | |
118 | # copy_from_user(). There are still unprovable places in the | |
119 | # generic code as of 2.6.34, so this option is not really compatible | |
120 | # with -Werror, which is more useful in general. | |
121 | config DEBUG_COPY_FROM_USER | |
122 | def_bool n | |
123 | ||
124 | config HVC_TILE | |
4f73bc4d | 125 | depends on TTY |
867e359b CM |
126 | select HVC_DRIVER |
127 | def_bool y | |
128 | ||
867e359b | 129 | config TILEGX |
867e359b CM |
130 | bool "Building with TILE-Gx (64-bit) compiler and toolchain" |
131 | ||
acd1a19e CM |
132 | config TILEPRO |
133 | def_bool !TILEGX | |
134 | ||
867e359b | 135 | config 64BIT |
acd1a19e | 136 | def_bool TILEGX |
867e359b CM |
137 | |
138 | config ARCH_DEFCONFIG | |
139 | string | |
3d1e8a81 | 140 | default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
867e359b CM |
141 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
142 | ||
143 | source "init/Kconfig" | |
144 | ||
99a844b7 CM |
145 | source "kernel/Kconfig.freezer" |
146 | ||
867e359b CM |
147 | menu "Tilera-specific configuration" |
148 | ||
149 | config NR_CPUS | |
150 | int "Maximum number of tiles (2-255)" | |
151 | range 2 255 | |
152 | depends on SMP | |
153 | default "64" | |
154 | ---help--- | |
155 | Building with 64 is the recommended value, but a slightly | |
156 | smaller kernel memory footprint results from using a smaller | |
157 | value on chips with fewer tiles. | |
158 | ||
d5d14ed6 CM |
159 | if TILEGX |
160 | ||
161 | choice | |
162 | prompt "Kernel page size" | |
163 | default PAGE_SIZE_64KB | |
164 | help | |
165 | This lets you select the page size of the kernel. For best | |
166 | performance on memory-intensive applications, a page size of 64KB | |
167 | is recommended. For workloads involving many small files, many | |
168 | connections, etc., it may be better to select 16KB, which uses | |
169 | memory more efficiently at some cost in TLB performance. | |
170 | ||
171 | Note that this option is TILE-Gx specific; currently | |
172 | TILEPro page size is set by rebuilding the hypervisor. | |
173 | ||
174 | config PAGE_SIZE_16KB | |
175 | bool "16KB" | |
176 | ||
177 | config PAGE_SIZE_64KB | |
178 | bool "64KB" | |
179 | ||
180 | endchoice | |
181 | ||
182 | endif | |
183 | ||
867e359b CM |
184 | source "kernel/Kconfig.hz" |
185 | ||
186 | config KEXEC | |
187 | bool "kexec system call" | |
188 | ---help--- | |
189 | kexec is a system call that implements the ability to shutdown your | |
190 | current kernel, and to start another kernel. It is like a reboot | |
191 | but it is independent of the system firmware. It is used | |
192 | to implement the "mboot" Tilera booter. | |
193 | ||
194 | The name comes from the similarity to the exec system call. | |
195 | ||
196 | config COMPAT | |
197 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
198 | depends on TILEGX | |
199 | select COMPAT_BINFMT_ELF | |
200 | default y | |
201 | ---help--- | |
202 | If enabled, the kernel will support running TILE-Gx binaries | |
203 | that were built with the -m32 option. | |
204 | ||
205 | config SYSVIPC_COMPAT | |
206 | def_bool y | |
207 | depends on COMPAT && SYSVIPC | |
208 | ||
209 | # We do not currently support disabling HIGHMEM on tile64 and tilepro. | |
210 | config HIGHMEM | |
211 | bool # "Support for more than 512 MB of RAM" | |
212 | default !TILEGX | |
213 | ---help--- | |
214 | Linux can use the full amount of RAM in the system by | |
215 | default. However, the address space of TILE processors is | |
216 | only 4 Gigabytes large. That means that, if you have a large | |
217 | amount of physical memory, not all of it can be "permanently | |
218 | mapped" by the kernel. The physical memory that's not | |
219 | permanently mapped is called "high memory". | |
220 | ||
221 | If you are compiling a kernel which will never run on a | |
222 | machine with more than 512 MB total physical RAM, answer | |
223 | "false" here. This will result in the kernel mapping all of | |
224 | physical memory into the top 1 GB of virtual memory space. | |
225 | ||
226 | If unsure, say "true". | |
227 | ||
eef015c8 CM |
228 | config ZONE_DMA |
229 | def_bool y | |
230 | ||
41bb38fc CM |
231 | config IOMMU_HELPER |
232 | bool | |
233 | ||
234 | config NEED_SG_DMA_LENGTH | |
235 | bool | |
236 | ||
237 | config SWIOTLB | |
238 | bool | |
239 | default TILEGX | |
240 | select IOMMU_HELPER | |
241 | select NEED_SG_DMA_LENGTH | |
242 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
243 | ||
867e359b CM |
244 | # We do not currently support disabling NUMA. |
245 | config NUMA | |
246 | bool # "NUMA Memory Allocation and Scheduler Support" | |
247 | depends on SMP && DISCONTIGMEM | |
248 | default y | |
249 | ---help--- | |
250 | NUMA memory allocation is required for TILE processors | |
251 | unless booting with memory striping enabled in the | |
252 | hypervisor, or with only a single memory controller. | |
253 | It is recommended that this option always be enabled. | |
254 | ||
255 | config NODES_SHIFT | |
256 | int "Log base 2 of the max number of memory controllers" | |
257 | default 2 | |
258 | depends on NEED_MULTIPLE_NODES | |
259 | ---help--- | |
260 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
261 | In a system with more controllers, this value should be raised. | |
262 | ||
867e359b CM |
263 | choice |
264 | depends on !TILEGX | |
6a108a14 | 265 | prompt "Memory split" if EXPERT |
867e359b CM |
266 | default VMSPLIT_3G |
267 | ---help--- | |
268 | Select the desired split between kernel and user memory. | |
269 | ||
270 | If the address range available to the kernel is less than the | |
271 | physical memory installed, the remaining memory will be available | |
272 | as "high memory". Accessing high memory is a little more costly | |
273 | than low memory, as it needs to be mapped into the kernel first. | |
274 | Note that increasing the kernel address space limits the range | |
275 | available to user programs, making the address space there | |
276 | tighter. Selecting anything other than the default 3G/1G split | |
277 | will also likely make your kernel incompatible with binary-only | |
278 | kernel modules. | |
279 | ||
280 | If you are not absolutely sure what you are doing, leave this | |
281 | option alone! | |
282 | ||
5592840b | 283 | config VMSPLIT_3_75G |
867e359b | 284 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 285 | config VMSPLIT_3_5G |
867e359b CM |
286 | bool "3.5G/0.5G user/kernel split" |
287 | config VMSPLIT_3G | |
288 | bool "3G/1G user/kernel split" | |
09c17eab CM |
289 | config VMSPLIT_2_75G |
290 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
291 | config VMSPLIT_2_5G | |
292 | bool "2.5G/1.5G user/kernel split" | |
293 | config VMSPLIT_2_25G | |
294 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
295 | config VMSPLIT_2G |
296 | bool "2G/2G user/kernel split" | |
297 | config VMSPLIT_1G | |
298 | bool "1G/3G user/kernel split" | |
299 | endchoice | |
300 | ||
301 | config PAGE_OFFSET | |
302 | hex | |
884197f7 | 303 | depends on !64BIT |
5592840b CM |
304 | default 0xF0000000 if VMSPLIT_3_75G |
305 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
306 | default 0xB0000000 if VMSPLIT_2_75G |
307 | default 0xA0000000 if VMSPLIT_2_5G | |
308 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
309 | default 0x80000000 if VMSPLIT_2G |
310 | default 0x40000000 if VMSPLIT_1G | |
311 | default 0xC0000000 | |
312 | ||
313 | source "mm/Kconfig" | |
314 | ||
315 | config CMDLINE_BOOL | |
316 | bool "Built-in kernel command line" | |
317 | default n | |
318 | ---help--- | |
319 | Allow for specifying boot arguments to the kernel at | |
320 | build time. On some systems (e.g. embedded ones), it is | |
321 | necessary or convenient to provide some or all of the | |
322 | kernel boot arguments with the kernel itself (that is, | |
323 | to not rely on the boot loader to provide them.) | |
324 | ||
325 | To compile command line arguments into the kernel, | |
326 | set this option to 'Y', then fill in the | |
327 | the boot arguments in CONFIG_CMDLINE. | |
328 | ||
329 | Systems with fully functional boot loaders (e.g. mboot, or | |
330 | if booting over PCI) should leave this option set to 'N'. | |
331 | ||
332 | config CMDLINE | |
333 | string "Built-in kernel command string" | |
334 | depends on CMDLINE_BOOL | |
335 | default "" | |
336 | ---help--- | |
337 | Enter arguments here that should be compiled into the kernel | |
338 | image and used at boot time. If the boot loader provides a | |
339 | command line at boot time, it is appended to this string to | |
340 | form the full kernel command line, when the system boots. | |
341 | ||
342 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
343 | change this behavior. | |
344 | ||
345 | In most cases, the command line (whether built-in or provided | |
346 | by the boot loader) should specify the device for the root | |
347 | file system. | |
348 | ||
349 | config CMDLINE_OVERRIDE | |
350 | bool "Built-in command line overrides boot loader arguments" | |
351 | default n | |
352 | depends on CMDLINE_BOOL | |
353 | ---help--- | |
354 | Set this option to 'Y' to have the kernel ignore the boot loader | |
355 | command line, and use ONLY the built-in command line. | |
356 | ||
357 | This is used to work around broken boot loaders. This should | |
358 | be set to 'N' under normal conditions. | |
359 | ||
360 | config VMALLOC_RESERVE | |
361 | hex | |
362 | default 0x1000000 | |
363 | ||
9f9c0382 CM |
364 | config HARDWALL |
365 | bool "Hardwall support to allow access to user dynamic network" | |
366 | default y | |
367 | ||
a78c942d CM |
368 | config KERNEL_PL |
369 | int "Processor protection level for kernel" | |
370 | range 1 2 | |
371 | default "1" | |
372 | ---help--- | |
373 | This setting determines the processor protection level the | |
374 | kernel will be built to run at. Generally you should use | |
375 | the default value here. | |
376 | ||
37b82b5d CM |
377 | source "arch/tile/gxio/Kconfig" |
378 | ||
867e359b CM |
379 | endmenu # Tilera-specific configuration |
380 | ||
381 | menu "Bus options" | |
382 | ||
f02cbbe6 CM |
383 | config PCI |
384 | bool "PCI support" | |
385 | default y | |
386 | select PCI_DOMAINS | |
84550121 | 387 | select GENERIC_PCI_IOMAP |
12962267 CM |
388 | select TILE_GXIO_TRIO if TILEGX |
389 | select ARCH_SUPPORTS_MSI if TILEGX | |
390 | select PCI_MSI if TILEGX | |
f02cbbe6 CM |
391 | ---help--- |
392 | Enable PCI root complex support, so PCIe endpoint devices can | |
393 | be attached to the Tile chip. Many, but not all, PCI devices | |
394 | are supported under Tilera's root complex driver. | |
395 | ||
396 | config PCI_DOMAINS | |
397 | bool | |
398 | ||
867e359b CM |
399 | config NO_IOMEM |
400 | def_bool !PCI | |
401 | ||
402 | config NO_IOPORT | |
403 | def_bool !PCI | |
404 | ||
405 | source "drivers/pci/Kconfig" | |
406 | ||
47fc28bf CM |
407 | config TILE_USB |
408 | tristate "Tilera USB host adapter support" | |
409 | default y | |
410 | depends on USB | |
411 | depends on TILEGX | |
412 | select TILE_GXIO_USB_HOST | |
413 | ---help--- | |
414 | Provides USB host adapter support for the built-in EHCI and OHCI | |
415 | interfaces on TILE-Gx chips. | |
416 | ||
867e359b CM |
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" | |
a78c942d CM |
445 | |
446 | source "arch/tile/kvm/Kconfig" |