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 |
0f8b9838 CM |
24 | select GENERIC_KERNEL_THREAD |
25 | select GENERIC_KERNEL_EXECVE | |
867e359b | 26 | |
8df27406 TG |
27 | # FIXME: investigate whether we need/want these options. |
28 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
29 | # select HAVE_OPTPROBES |
30 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
31 | # select HAVE_HW_BREAKPOINT | |
32 | # select PERF_EVENTS | |
33 | # select HAVE_USER_RETURN_NOTIFIER | |
34 | # config NO_BOOTMEM | |
35 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
36 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 37 | |
8df27406 | 38 | config MMU |
867e359b CM |
39 | def_bool y |
40 | ||
8df27406 | 41 | config GENERIC_CSUM |
867e359b | 42 | def_bool y |
867e359b CM |
43 | |
44 | config SEMAPHORE_SLEEPERS | |
45 | def_bool y | |
46 | ||
47 | config HAVE_ARCH_ALLOC_REMAP | |
48 | def_bool y | |
49 | ||
50 | config HAVE_SETUP_PER_CPU_AREA | |
51 | def_bool y | |
52 | ||
53 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 54 | def_bool y |
867e359b CM |
55 | |
56 | config SYS_SUPPORTS_HUGETLBFS | |
57 | def_bool y | |
58 | ||
621b1955 CM |
59 | # Support for additional huge page sizes besides HPAGE_SIZE. |
60 | # The software support is currently only present in the TILE-Gx | |
61 | # hypervisor. TILEPro in any case does not support page sizes | |
62 | # larger than the default HPAGE_SIZE. | |
63 | config HUGETLB_SUPER_PAGES | |
64 | depends on HUGETLB_PAGE && TILEGX | |
65 | def_bool y | |
66 | ||
25985edc | 67 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
68 | config RWSEM_GENERIC_SPINLOCK |
69 | def_bool y | |
70 | ||
71 | # We have a very flat architecture from a migration point of view, | |
72 | # so save boot time by presetting this (particularly useful on tile-sim). | |
73 | config DEFAULT_MIGRATION_COST | |
74 | int | |
75 | default "10000000" | |
76 | ||
77 | # We only support gcc 4.4 and above, so this should work. | |
78 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
79 | def_bool y | |
80 | ||
81 | config ARCH_PHYS_ADDR_T_64BIT | |
82 | def_bool y | |
83 | ||
d31eb519 FT |
84 | config ARCH_DMA_ADDR_T_64BIT |
85 | def_bool y | |
86 | ||
3d1e8a81 CM |
87 | config NEED_DMA_MAP_STATE |
88 | def_bool y | |
89 | ||
41bb38fc CM |
90 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
91 | bool | |
92 | ||
867e359b CM |
93 | config LOCKDEP_SUPPORT |
94 | def_bool y | |
95 | ||
96 | config STACKTRACE_SUPPORT | |
97 | def_bool y | |
98 | select STACKTRACE | |
99 | ||
100 | # We use discontigmem for now; at some point we may want to switch | |
101 | # to sparsemem (Tilera bug 7996). | |
102 | config ARCH_DISCONTIGMEM_ENABLE | |
103 | def_bool y | |
104 | ||
105 | config ARCH_DISCONTIGMEM_DEFAULT | |
106 | def_bool y | |
107 | ||
108 | config TRACE_IRQFLAGS_SUPPORT | |
109 | def_bool y | |
110 | ||
111 | config STRICT_DEVMEM | |
112 | def_bool y | |
113 | ||
114 | # SMP is required for Tilera Linux. | |
115 | config SMP | |
116 | def_bool y | |
117 | ||
118 | # Allow checking for compile-time determined overflow errors in | |
119 | # copy_from_user(). There are still unprovable places in the | |
120 | # generic code as of 2.6.34, so this option is not really compatible | |
121 | # with -Werror, which is more useful in general. | |
122 | config DEBUG_COPY_FROM_USER | |
123 | def_bool n | |
124 | ||
125 | config HVC_TILE | |
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 | ||
145 | menu "Tilera-specific configuration" | |
146 | ||
147 | config NR_CPUS | |
148 | int "Maximum number of tiles (2-255)" | |
149 | range 2 255 | |
150 | depends on SMP | |
151 | default "64" | |
152 | ---help--- | |
153 | Building with 64 is the recommended value, but a slightly | |
154 | smaller kernel memory footprint results from using a smaller | |
155 | value on chips with fewer tiles. | |
156 | ||
d5d14ed6 CM |
157 | if TILEGX |
158 | ||
159 | choice | |
160 | prompt "Kernel page size" | |
161 | default PAGE_SIZE_64KB | |
162 | help | |
163 | This lets you select the page size of the kernel. For best | |
164 | performance on memory-intensive applications, a page size of 64KB | |
165 | is recommended. For workloads involving many small files, many | |
166 | connections, etc., it may be better to select 16KB, which uses | |
167 | memory more efficiently at some cost in TLB performance. | |
168 | ||
169 | Note that this option is TILE-Gx specific; currently | |
170 | TILEPro page size is set by rebuilding the hypervisor. | |
171 | ||
172 | config PAGE_SIZE_16KB | |
173 | bool "16KB" | |
174 | ||
175 | config PAGE_SIZE_64KB | |
176 | bool "64KB" | |
177 | ||
178 | endchoice | |
179 | ||
180 | endif | |
181 | ||
867e359b CM |
182 | source "kernel/Kconfig.hz" |
183 | ||
184 | config KEXEC | |
185 | bool "kexec system call" | |
186 | ---help--- | |
187 | kexec is a system call that implements the ability to shutdown your | |
188 | current kernel, and to start another kernel. It is like a reboot | |
189 | but it is independent of the system firmware. It is used | |
190 | to implement the "mboot" Tilera booter. | |
191 | ||
192 | The name comes from the similarity to the exec system call. | |
193 | ||
194 | config COMPAT | |
195 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
196 | depends on TILEGX | |
197 | select COMPAT_BINFMT_ELF | |
198 | default y | |
199 | ---help--- | |
200 | If enabled, the kernel will support running TILE-Gx binaries | |
201 | that were built with the -m32 option. | |
202 | ||
203 | config SYSVIPC_COMPAT | |
204 | def_bool y | |
205 | depends on COMPAT && SYSVIPC | |
206 | ||
207 | # We do not currently support disabling HIGHMEM on tile64 and tilepro. | |
208 | config HIGHMEM | |
209 | bool # "Support for more than 512 MB of RAM" | |
210 | default !TILEGX | |
211 | ---help--- | |
212 | Linux can use the full amount of RAM in the system by | |
213 | default. However, the address space of TILE processors is | |
214 | only 4 Gigabytes large. That means that, if you have a large | |
215 | amount of physical memory, not all of it can be "permanently | |
216 | mapped" by the kernel. The physical memory that's not | |
217 | permanently mapped is called "high memory". | |
218 | ||
219 | If you are compiling a kernel which will never run on a | |
220 | machine with more than 512 MB total physical RAM, answer | |
221 | "false" here. This will result in the kernel mapping all of | |
222 | physical memory into the top 1 GB of virtual memory space. | |
223 | ||
224 | If unsure, say "true". | |
225 | ||
eef015c8 CM |
226 | config ZONE_DMA |
227 | def_bool y | |
228 | ||
41bb38fc CM |
229 | config IOMMU_HELPER |
230 | bool | |
231 | ||
232 | config NEED_SG_DMA_LENGTH | |
233 | bool | |
234 | ||
235 | config SWIOTLB | |
236 | bool | |
237 | default TILEGX | |
238 | select IOMMU_HELPER | |
239 | select NEED_SG_DMA_LENGTH | |
240 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
241 | ||
867e359b CM |
242 | # We do not currently support disabling NUMA. |
243 | config NUMA | |
244 | bool # "NUMA Memory Allocation and Scheduler Support" | |
245 | depends on SMP && DISCONTIGMEM | |
246 | default y | |
247 | ---help--- | |
248 | NUMA memory allocation is required for TILE processors | |
249 | unless booting with memory striping enabled in the | |
250 | hypervisor, or with only a single memory controller. | |
251 | It is recommended that this option always be enabled. | |
252 | ||
253 | config NODES_SHIFT | |
254 | int "Log base 2 of the max number of memory controllers" | |
255 | default 2 | |
256 | depends on NEED_MULTIPLE_NODES | |
257 | ---help--- | |
258 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
259 | In a system with more controllers, this value should be raised. | |
260 | ||
867e359b CM |
261 | choice |
262 | depends on !TILEGX | |
6a108a14 | 263 | prompt "Memory split" if EXPERT |
867e359b CM |
264 | default VMSPLIT_3G |
265 | ---help--- | |
266 | Select the desired split between kernel and user memory. | |
267 | ||
268 | If the address range available to the kernel is less than the | |
269 | physical memory installed, the remaining memory will be available | |
270 | as "high memory". Accessing high memory is a little more costly | |
271 | than low memory, as it needs to be mapped into the kernel first. | |
272 | Note that increasing the kernel address space limits the range | |
273 | available to user programs, making the address space there | |
274 | tighter. Selecting anything other than the default 3G/1G split | |
275 | will also likely make your kernel incompatible with binary-only | |
276 | kernel modules. | |
277 | ||
278 | If you are not absolutely sure what you are doing, leave this | |
279 | option alone! | |
280 | ||
5592840b | 281 | config VMSPLIT_3_75G |
867e359b | 282 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 283 | config VMSPLIT_3_5G |
867e359b CM |
284 | bool "3.5G/0.5G user/kernel split" |
285 | config VMSPLIT_3G | |
286 | bool "3G/1G user/kernel split" | |
09c17eab CM |
287 | config VMSPLIT_2_75G |
288 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
289 | config VMSPLIT_2_5G | |
290 | bool "2.5G/1.5G user/kernel split" | |
291 | config VMSPLIT_2_25G | |
292 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
293 | config VMSPLIT_2G |
294 | bool "2G/2G user/kernel split" | |
295 | config VMSPLIT_1G | |
296 | bool "1G/3G user/kernel split" | |
297 | endchoice | |
298 | ||
299 | config PAGE_OFFSET | |
300 | hex | |
884197f7 | 301 | depends on !64BIT |
5592840b CM |
302 | default 0xF0000000 if VMSPLIT_3_75G |
303 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
304 | default 0xB0000000 if VMSPLIT_2_75G |
305 | default 0xA0000000 if VMSPLIT_2_5G | |
306 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
307 | default 0x80000000 if VMSPLIT_2G |
308 | default 0x40000000 if VMSPLIT_1G | |
309 | default 0xC0000000 | |
310 | ||
311 | source "mm/Kconfig" | |
312 | ||
313 | config CMDLINE_BOOL | |
314 | bool "Built-in kernel command line" | |
315 | default n | |
316 | ---help--- | |
317 | Allow for specifying boot arguments to the kernel at | |
318 | build time. On some systems (e.g. embedded ones), it is | |
319 | necessary or convenient to provide some or all of the | |
320 | kernel boot arguments with the kernel itself (that is, | |
321 | to not rely on the boot loader to provide them.) | |
322 | ||
323 | To compile command line arguments into the kernel, | |
324 | set this option to 'Y', then fill in the | |
325 | the boot arguments in CONFIG_CMDLINE. | |
326 | ||
327 | Systems with fully functional boot loaders (e.g. mboot, or | |
328 | if booting over PCI) should leave this option set to 'N'. | |
329 | ||
330 | config CMDLINE | |
331 | string "Built-in kernel command string" | |
332 | depends on CMDLINE_BOOL | |
333 | default "" | |
334 | ---help--- | |
335 | Enter arguments here that should be compiled into the kernel | |
336 | image and used at boot time. If the boot loader provides a | |
337 | command line at boot time, it is appended to this string to | |
338 | form the full kernel command line, when the system boots. | |
339 | ||
340 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
341 | change this behavior. | |
342 | ||
343 | In most cases, the command line (whether built-in or provided | |
344 | by the boot loader) should specify the device for the root | |
345 | file system. | |
346 | ||
347 | config CMDLINE_OVERRIDE | |
348 | bool "Built-in command line overrides boot loader arguments" | |
349 | default n | |
350 | depends on CMDLINE_BOOL | |
351 | ---help--- | |
352 | Set this option to 'Y' to have the kernel ignore the boot loader | |
353 | command line, and use ONLY the built-in command line. | |
354 | ||
355 | This is used to work around broken boot loaders. This should | |
356 | be set to 'N' under normal conditions. | |
357 | ||
358 | config VMALLOC_RESERVE | |
359 | hex | |
360 | default 0x1000000 | |
361 | ||
9f9c0382 CM |
362 | config HARDWALL |
363 | bool "Hardwall support to allow access to user dynamic network" | |
364 | default y | |
365 | ||
a78c942d CM |
366 | config KERNEL_PL |
367 | int "Processor protection level for kernel" | |
368 | range 1 2 | |
369 | default "1" | |
370 | ---help--- | |
371 | This setting determines the processor protection level the | |
372 | kernel will be built to run at. Generally you should use | |
373 | the default value here. | |
374 | ||
37b82b5d CM |
375 | source "arch/tile/gxio/Kconfig" |
376 | ||
867e359b CM |
377 | endmenu # Tilera-specific configuration |
378 | ||
379 | menu "Bus options" | |
380 | ||
f02cbbe6 CM |
381 | config PCI |
382 | bool "PCI support" | |
383 | default y | |
384 | select PCI_DOMAINS | |
84550121 | 385 | select GENERIC_PCI_IOMAP |
12962267 CM |
386 | select TILE_GXIO_TRIO if TILEGX |
387 | select ARCH_SUPPORTS_MSI if TILEGX | |
388 | select PCI_MSI if TILEGX | |
f02cbbe6 CM |
389 | ---help--- |
390 | Enable PCI root complex support, so PCIe endpoint devices can | |
391 | be attached to the Tile chip. Many, but not all, PCI devices | |
392 | are supported under Tilera's root complex driver. | |
393 | ||
394 | config PCI_DOMAINS | |
395 | bool | |
396 | ||
867e359b CM |
397 | config NO_IOMEM |
398 | def_bool !PCI | |
399 | ||
400 | config NO_IOPORT | |
401 | def_bool !PCI | |
402 | ||
403 | source "drivers/pci/Kconfig" | |
404 | ||
47fc28bf CM |
405 | config TILE_USB |
406 | tristate "Tilera USB host adapter support" | |
407 | default y | |
408 | depends on USB | |
409 | depends on TILEGX | |
410 | select TILE_GXIO_USB_HOST | |
411 | ---help--- | |
412 | Provides USB host adapter support for the built-in EHCI and OHCI | |
413 | interfaces on TILE-Gx chips. | |
414 | ||
f1006257 CM |
415 | # USB OHCI needs the bounce pool since tilegx will often have more |
416 | # than 4GB of memory, but we don't currently use the IOTLB to present | |
417 | # a 32-bit address to OHCI. So we need to use a bounce pool instead. | |
418 | config NEED_BOUNCE_POOL | |
419 | def_bool USB_OHCI_HCD | |
420 | ||
867e359b CM |
421 | source "drivers/pci/hotplug/Kconfig" |
422 | ||
423 | endmenu | |
424 | ||
425 | menu "Executable file formats" | |
426 | ||
427 | # only elf supported | |
428 | config KCORE_ELF | |
429 | def_bool y | |
430 | depends on PROC_FS | |
431 | ||
432 | source "fs/Kconfig.binfmt" | |
433 | ||
434 | endmenu | |
435 | ||
436 | source "net/Kconfig" | |
437 | ||
438 | source "drivers/Kconfig" | |
439 | ||
440 | source "fs/Kconfig" | |
441 | ||
442 | source "arch/tile/Kconfig.debug" | |
443 | ||
444 | source "security/Kconfig" | |
445 | ||
446 | source "crypto/Kconfig" | |
447 | ||
448 | source "lib/Kconfig" | |
a78c942d CM |
449 | |
450 | source "arch/tile/kvm/Kconfig" |