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 |
f133ecca | 20 | select SYS_HYPERVISOR |
8d695143 | 21 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4ec008d6 | 22 | select GENERIC_CLOCKEVENTS |
786d35d4 | 23 | select MODULES_USE_ELF_RELA |
867e359b | 24 | |
8df27406 TG |
25 | # FIXME: investigate whether we need/want these options. |
26 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
27 | # select HAVE_OPTPROBES |
28 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
29 | # select HAVE_HW_BREAKPOINT | |
30 | # select PERF_EVENTS | |
31 | # select HAVE_USER_RETURN_NOTIFIER | |
32 | # config NO_BOOTMEM | |
33 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
34 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 35 | |
8df27406 | 36 | config MMU |
867e359b CM |
37 | def_bool y |
38 | ||
8df27406 | 39 | config GENERIC_CSUM |
867e359b | 40 | def_bool y |
867e359b CM |
41 | |
42 | config SEMAPHORE_SLEEPERS | |
43 | def_bool y | |
44 | ||
45 | config HAVE_ARCH_ALLOC_REMAP | |
46 | def_bool y | |
47 | ||
48 | config HAVE_SETUP_PER_CPU_AREA | |
49 | def_bool y | |
50 | ||
51 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 52 | def_bool y |
867e359b CM |
53 | |
54 | config SYS_SUPPORTS_HUGETLBFS | |
55 | def_bool y | |
56 | ||
621b1955 CM |
57 | # Support for additional huge page sizes besides HPAGE_SIZE. |
58 | # The software support is currently only present in the TILE-Gx | |
59 | # hypervisor. TILEPro in any case does not support page sizes | |
60 | # larger than the default HPAGE_SIZE. | |
61 | config HUGETLB_SUPER_PAGES | |
62 | depends on HUGETLB_PAGE && TILEGX | |
63 | def_bool y | |
64 | ||
25985edc | 65 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
66 | config RWSEM_GENERIC_SPINLOCK |
67 | def_bool y | |
68 | ||
69 | # We have a very flat architecture from a migration point of view, | |
70 | # so save boot time by presetting this (particularly useful on tile-sim). | |
71 | config DEFAULT_MIGRATION_COST | |
72 | int | |
73 | default "10000000" | |
74 | ||
75 | # We only support gcc 4.4 and above, so this should work. | |
76 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
77 | def_bool y | |
78 | ||
79 | config ARCH_PHYS_ADDR_T_64BIT | |
80 | def_bool y | |
81 | ||
d31eb519 FT |
82 | config ARCH_DMA_ADDR_T_64BIT |
83 | def_bool y | |
84 | ||
3d1e8a81 CM |
85 | config NEED_DMA_MAP_STATE |
86 | def_bool y | |
87 | ||
41bb38fc CM |
88 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
89 | bool | |
90 | ||
867e359b CM |
91 | config LOCKDEP_SUPPORT |
92 | def_bool y | |
93 | ||
94 | config STACKTRACE_SUPPORT | |
95 | def_bool y | |
96 | select STACKTRACE | |
97 | ||
98 | # We use discontigmem for now; at some point we may want to switch | |
99 | # to sparsemem (Tilera bug 7996). | |
100 | config ARCH_DISCONTIGMEM_ENABLE | |
101 | def_bool y | |
102 | ||
103 | config ARCH_DISCONTIGMEM_DEFAULT | |
104 | def_bool y | |
105 | ||
106 | config TRACE_IRQFLAGS_SUPPORT | |
107 | def_bool y | |
108 | ||
109 | config STRICT_DEVMEM | |
110 | def_bool y | |
111 | ||
112 | # SMP is required for Tilera Linux. | |
113 | config SMP | |
114 | def_bool y | |
115 | ||
116 | # Allow checking for compile-time determined overflow errors in | |
117 | # copy_from_user(). There are still unprovable places in the | |
118 | # generic code as of 2.6.34, so this option is not really compatible | |
119 | # with -Werror, which is more useful in general. | |
120 | config DEBUG_COPY_FROM_USER | |
121 | def_bool n | |
122 | ||
123 | config HVC_TILE | |
4f73bc4d | 124 | depends on TTY |
867e359b CM |
125 | select HVC_DRIVER |
126 | def_bool y | |
127 | ||
867e359b | 128 | config TILEGX |
867e359b CM |
129 | bool "Building with TILE-Gx (64-bit) compiler and toolchain" |
130 | ||
acd1a19e CM |
131 | config TILEPRO |
132 | def_bool !TILEGX | |
133 | ||
867e359b | 134 | config 64BIT |
acd1a19e | 135 | def_bool TILEGX |
867e359b CM |
136 | |
137 | config ARCH_DEFCONFIG | |
138 | string | |
3d1e8a81 | 139 | default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
867e359b CM |
140 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
141 | ||
142 | source "init/Kconfig" | |
143 | ||
144 | menu "Tilera-specific configuration" | |
145 | ||
146 | config NR_CPUS | |
147 | int "Maximum number of tiles (2-255)" | |
148 | range 2 255 | |
149 | depends on SMP | |
150 | default "64" | |
151 | ---help--- | |
152 | Building with 64 is the recommended value, but a slightly | |
153 | smaller kernel memory footprint results from using a smaller | |
154 | value on chips with fewer tiles. | |
155 | ||
d5d14ed6 CM |
156 | if TILEGX |
157 | ||
158 | choice | |
159 | prompt "Kernel page size" | |
160 | default PAGE_SIZE_64KB | |
161 | help | |
162 | This lets you select the page size of the kernel. For best | |
163 | performance on memory-intensive applications, a page size of 64KB | |
164 | is recommended. For workloads involving many small files, many | |
165 | connections, etc., it may be better to select 16KB, which uses | |
166 | memory more efficiently at some cost in TLB performance. | |
167 | ||
168 | Note that this option is TILE-Gx specific; currently | |
169 | TILEPro page size is set by rebuilding the hypervisor. | |
170 | ||
171 | config PAGE_SIZE_16KB | |
172 | bool "16KB" | |
173 | ||
174 | config PAGE_SIZE_64KB | |
175 | bool "64KB" | |
176 | ||
177 | endchoice | |
178 | ||
179 | endif | |
180 | ||
867e359b CM |
181 | source "kernel/Kconfig.hz" |
182 | ||
183 | config KEXEC | |
184 | bool "kexec system call" | |
185 | ---help--- | |
186 | kexec is a system call that implements the ability to shutdown your | |
187 | current kernel, and to start another kernel. It is like a reboot | |
188 | but it is independent of the system firmware. It is used | |
189 | to implement the "mboot" Tilera booter. | |
190 | ||
191 | The name comes from the similarity to the exec system call. | |
192 | ||
193 | config COMPAT | |
194 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
195 | depends on TILEGX | |
196 | select COMPAT_BINFMT_ELF | |
197 | default y | |
198 | ---help--- | |
199 | If enabled, the kernel will support running TILE-Gx binaries | |
200 | that were built with the -m32 option. | |
201 | ||
202 | config SYSVIPC_COMPAT | |
203 | def_bool y | |
204 | depends on COMPAT && SYSVIPC | |
205 | ||
206 | # We do not currently support disabling HIGHMEM on tile64 and tilepro. | |
207 | config HIGHMEM | |
208 | bool # "Support for more than 512 MB of RAM" | |
209 | default !TILEGX | |
210 | ---help--- | |
211 | Linux can use the full amount of RAM in the system by | |
212 | default. However, the address space of TILE processors is | |
213 | only 4 Gigabytes large. That means that, if you have a large | |
214 | amount of physical memory, not all of it can be "permanently | |
215 | mapped" by the kernel. The physical memory that's not | |
216 | permanently mapped is called "high memory". | |
217 | ||
218 | If you are compiling a kernel which will never run on a | |
219 | machine with more than 512 MB total physical RAM, answer | |
220 | "false" here. This will result in the kernel mapping all of | |
221 | physical memory into the top 1 GB of virtual memory space. | |
222 | ||
223 | If unsure, say "true". | |
224 | ||
eef015c8 CM |
225 | config ZONE_DMA |
226 | def_bool y | |
227 | ||
41bb38fc CM |
228 | config IOMMU_HELPER |
229 | bool | |
230 | ||
231 | config NEED_SG_DMA_LENGTH | |
232 | bool | |
233 | ||
234 | config SWIOTLB | |
235 | bool | |
236 | default TILEGX | |
237 | select IOMMU_HELPER | |
238 | select NEED_SG_DMA_LENGTH | |
239 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
240 | ||
867e359b CM |
241 | # We do not currently support disabling NUMA. |
242 | config NUMA | |
243 | bool # "NUMA Memory Allocation and Scheduler Support" | |
244 | depends on SMP && DISCONTIGMEM | |
245 | default y | |
246 | ---help--- | |
247 | NUMA memory allocation is required for TILE processors | |
248 | unless booting with memory striping enabled in the | |
249 | hypervisor, or with only a single memory controller. | |
250 | It is recommended that this option always be enabled. | |
251 | ||
252 | config NODES_SHIFT | |
253 | int "Log base 2 of the max number of memory controllers" | |
254 | default 2 | |
255 | depends on NEED_MULTIPLE_NODES | |
256 | ---help--- | |
257 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
258 | In a system with more controllers, this value should be raised. | |
259 | ||
867e359b CM |
260 | choice |
261 | depends on !TILEGX | |
6a108a14 | 262 | prompt "Memory split" if EXPERT |
867e359b CM |
263 | default VMSPLIT_3G |
264 | ---help--- | |
265 | Select the desired split between kernel and user memory. | |
266 | ||
267 | If the address range available to the kernel is less than the | |
268 | physical memory installed, the remaining memory will be available | |
269 | as "high memory". Accessing high memory is a little more costly | |
270 | than low memory, as it needs to be mapped into the kernel first. | |
271 | Note that increasing the kernel address space limits the range | |
272 | available to user programs, making the address space there | |
273 | tighter. Selecting anything other than the default 3G/1G split | |
274 | will also likely make your kernel incompatible with binary-only | |
275 | kernel modules. | |
276 | ||
277 | If you are not absolutely sure what you are doing, leave this | |
278 | option alone! | |
279 | ||
5592840b | 280 | config VMSPLIT_3_75G |
867e359b | 281 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 282 | config VMSPLIT_3_5G |
867e359b CM |
283 | bool "3.5G/0.5G user/kernel split" |
284 | config VMSPLIT_3G | |
285 | bool "3G/1G user/kernel split" | |
09c17eab CM |
286 | config VMSPLIT_2_75G |
287 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
288 | config VMSPLIT_2_5G | |
289 | bool "2.5G/1.5G user/kernel split" | |
290 | config VMSPLIT_2_25G | |
291 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
292 | config VMSPLIT_2G |
293 | bool "2G/2G user/kernel split" | |
294 | config VMSPLIT_1G | |
295 | bool "1G/3G user/kernel split" | |
296 | endchoice | |
297 | ||
298 | config PAGE_OFFSET | |
299 | hex | |
884197f7 | 300 | depends on !64BIT |
5592840b CM |
301 | default 0xF0000000 if VMSPLIT_3_75G |
302 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
303 | default 0xB0000000 if VMSPLIT_2_75G |
304 | default 0xA0000000 if VMSPLIT_2_5G | |
305 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
306 | default 0x80000000 if VMSPLIT_2G |
307 | default 0x40000000 if VMSPLIT_1G | |
308 | default 0xC0000000 | |
309 | ||
310 | source "mm/Kconfig" | |
311 | ||
312 | config CMDLINE_BOOL | |
313 | bool "Built-in kernel command line" | |
314 | default n | |
315 | ---help--- | |
316 | Allow for specifying boot arguments to the kernel at | |
317 | build time. On some systems (e.g. embedded ones), it is | |
318 | necessary or convenient to provide some or all of the | |
319 | kernel boot arguments with the kernel itself (that is, | |
320 | to not rely on the boot loader to provide them.) | |
321 | ||
322 | To compile command line arguments into the kernel, | |
323 | set this option to 'Y', then fill in the | |
324 | the boot arguments in CONFIG_CMDLINE. | |
325 | ||
326 | Systems with fully functional boot loaders (e.g. mboot, or | |
327 | if booting over PCI) should leave this option set to 'N'. | |
328 | ||
329 | config CMDLINE | |
330 | string "Built-in kernel command string" | |
331 | depends on CMDLINE_BOOL | |
332 | default "" | |
333 | ---help--- | |
334 | Enter arguments here that should be compiled into the kernel | |
335 | image and used at boot time. If the boot loader provides a | |
336 | command line at boot time, it is appended to this string to | |
337 | form the full kernel command line, when the system boots. | |
338 | ||
339 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
340 | change this behavior. | |
341 | ||
342 | In most cases, the command line (whether built-in or provided | |
343 | by the boot loader) should specify the device for the root | |
344 | file system. | |
345 | ||
346 | config CMDLINE_OVERRIDE | |
347 | bool "Built-in command line overrides boot loader arguments" | |
348 | default n | |
349 | depends on CMDLINE_BOOL | |
350 | ---help--- | |
351 | Set this option to 'Y' to have the kernel ignore the boot loader | |
352 | command line, and use ONLY the built-in command line. | |
353 | ||
354 | This is used to work around broken boot loaders. This should | |
355 | be set to 'N' under normal conditions. | |
356 | ||
357 | config VMALLOC_RESERVE | |
358 | hex | |
359 | default 0x1000000 | |
360 | ||
9f9c0382 CM |
361 | config HARDWALL |
362 | bool "Hardwall support to allow access to user dynamic network" | |
363 | default y | |
364 | ||
a78c942d CM |
365 | config KERNEL_PL |
366 | int "Processor protection level for kernel" | |
367 | range 1 2 | |
368 | default "1" | |
369 | ---help--- | |
370 | This setting determines the processor protection level the | |
371 | kernel will be built to run at. Generally you should use | |
372 | the default value here. | |
373 | ||
37b82b5d CM |
374 | source "arch/tile/gxio/Kconfig" |
375 | ||
867e359b CM |
376 | endmenu # Tilera-specific configuration |
377 | ||
378 | menu "Bus options" | |
379 | ||
f02cbbe6 CM |
380 | config PCI |
381 | bool "PCI support" | |
382 | default y | |
383 | select PCI_DOMAINS | |
84550121 | 384 | select GENERIC_PCI_IOMAP |
12962267 CM |
385 | select TILE_GXIO_TRIO if TILEGX |
386 | select ARCH_SUPPORTS_MSI if TILEGX | |
387 | select PCI_MSI if TILEGX | |
f02cbbe6 CM |
388 | ---help--- |
389 | Enable PCI root complex support, so PCIe endpoint devices can | |
390 | be attached to the Tile chip. Many, but not all, PCI devices | |
391 | are supported under Tilera's root complex driver. | |
392 | ||
393 | config PCI_DOMAINS | |
394 | bool | |
395 | ||
867e359b CM |
396 | config NO_IOMEM |
397 | def_bool !PCI | |
398 | ||
399 | config NO_IOPORT | |
400 | def_bool !PCI | |
401 | ||
402 | source "drivers/pci/Kconfig" | |
403 | ||
47fc28bf CM |
404 | config TILE_USB |
405 | tristate "Tilera USB host adapter support" | |
406 | default y | |
407 | depends on USB | |
408 | depends on TILEGX | |
409 | select TILE_GXIO_USB_HOST | |
410 | ---help--- | |
411 | Provides USB host adapter support for the built-in EHCI and OHCI | |
412 | interfaces on TILE-Gx chips. | |
413 | ||
f1006257 CM |
414 | # USB OHCI needs the bounce pool since tilegx will often have more |
415 | # than 4GB of memory, but we don't currently use the IOTLB to present | |
416 | # a 32-bit address to OHCI. So we need to use a bounce pool instead. | |
417 | config NEED_BOUNCE_POOL | |
418 | def_bool USB_OHCI_HCD | |
419 | ||
867e359b CM |
420 | source "drivers/pci/hotplug/Kconfig" |
421 | ||
422 | endmenu | |
423 | ||
424 | menu "Executable file formats" | |
425 | ||
426 | # only elf supported | |
427 | config KCORE_ELF | |
428 | def_bool y | |
429 | depends on PROC_FS | |
430 | ||
431 | source "fs/Kconfig.binfmt" | |
432 | ||
433 | endmenu | |
434 | ||
435 | source "net/Kconfig" | |
436 | ||
437 | source "drivers/Kconfig" | |
438 | ||
439 | source "fs/Kconfig" | |
440 | ||
441 | source "arch/tile/Kconfig.debug" | |
442 | ||
443 | source "security/Kconfig" | |
444 | ||
445 | source "crypto/Kconfig" | |
446 | ||
447 | source "lib/Kconfig" | |
a78c942d CM |
448 | |
449 | source "arch/tile/kvm/Kconfig" |