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 |
4ef00aa3 | 6 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
446f24d1 | 7 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
21266be9 | 8 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
8d695143 | 9 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
49cf78ef | 10 | select ARCH_WANT_FRAME_POINTERS |
4ef00aa3 | 11 | select CC_OPTIMIZE_FOR_SIZE |
b01aec9b | 12 | select EDAC_SUPPORT |
4ef00aa3 CM |
13 | select GENERIC_CLOCKEVENTS |
14 | select GENERIC_FIND_FIRST_BIT | |
15 | select GENERIC_IRQ_PROBE | |
16 | select GENERIC_IRQ_SHOW | |
17 | select GENERIC_PENDING_IRQ if SMP | |
5bf6c07a CM |
18 | select GENERIC_STRNCPY_FROM_USER |
19 | select GENERIC_STRNLEN_USER | |
a0ddef81 | 20 | select HAVE_ARCH_SECCOMP_FILTER |
4ef00aa3 CM |
21 | select HAVE_ARCH_TRACEHOOK |
22 | select HAVE_CONTEXT_TRACKING | |
23 | select HAVE_DEBUG_BUGVERBOSE | |
24 | select HAVE_DEBUG_KMEMLEAK | |
25 | select HAVE_DEBUG_STACKOVERFLOW | |
26 | select HAVE_DMA_API_DEBUG | |
27 | select HAVE_KVM if !TILEGX | |
28 | select HAVE_PERF_EVENTS | |
29 | select HAVE_SYSCALL_TRACEPOINTS | |
30 | select MODULES_USE_ELF_RELA | |
31 | select SYSCTL_EXCEPTION_TRACE | |
32 | select SYS_HYPERVISOR | |
33 | select USER_STACKTRACE_SUPPORT | |
34 | select USE_PMC if PERF_EVENTS | |
35 | select VIRT_TO_BUS | |
867e359b | 36 | |
8df27406 | 37 | config MMU |
867e359b CM |
38 | def_bool y |
39 | ||
8df27406 | 40 | config GENERIC_CSUM |
867e359b | 41 | def_bool y |
867e359b | 42 | |
867e359b CM |
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 | |
5fb682b0 | 50 | def_bool y |
867e359b CM |
51 | |
52 | config SYS_SUPPORTS_HUGETLBFS | |
53 | def_bool y | |
54 | ||
621b1955 CM |
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 | ||
4a556f4f CM |
63 | config GENERIC_TIME_VSYSCALL |
64 | def_bool y | |
65 | ||
8e3441eb ZL |
66 | # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled. |
67 | config USE_PMC | |
68 | bool | |
69 | ||
25985edc | 70 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
71 | config RWSEM_GENERIC_SPINLOCK |
72 | def_bool y | |
73 | ||
867e359b CM |
74 | # We only support gcc 4.4 and above, so this should work. |
75 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
76 | def_bool y | |
77 | ||
78 | config ARCH_PHYS_ADDR_T_64BIT | |
79 | def_bool y | |
80 | ||
d31eb519 FT |
81 | config ARCH_DMA_ADDR_T_64BIT |
82 | def_bool y | |
83 | ||
3d1e8a81 CM |
84 | config NEED_DMA_MAP_STATE |
85 | def_bool y | |
86 | ||
41bb38fc CM |
87 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
88 | bool | |
89 | ||
867e359b CM |
90 | config LOCKDEP_SUPPORT |
91 | def_bool y | |
92 | ||
93 | config STACKTRACE_SUPPORT | |
94 | def_bool y | |
95 | select STACKTRACE | |
96 | ||
97 | # We use discontigmem for now; at some point we may want to switch | |
98 | # to sparsemem (Tilera bug 7996). | |
99 | config ARCH_DISCONTIGMEM_ENABLE | |
100 | def_bool y | |
101 | ||
102 | config ARCH_DISCONTIGMEM_DEFAULT | |
103 | def_bool y | |
104 | ||
105 | config TRACE_IRQFLAGS_SUPPORT | |
106 | def_bool y | |
107 | ||
867e359b CM |
108 | # SMP is required for Tilera Linux. |
109 | config SMP | |
110 | def_bool y | |
111 | ||
867e359b | 112 | config HVC_TILE |
4f73bc4d | 113 | depends on TTY |
867e359b | 114 | select HVC_DRIVER |
bda0f5ba | 115 | select HVC_IRQ if TILEGX |
867e359b CM |
116 | def_bool y |
117 | ||
41dd496c CM |
118 | # Building with ARCH=tilegx (or ARCH=tile) implies using the |
119 | # 64-bit TILE-Gx toolchain, so force CONFIG_TILEGX on. | |
867e359b | 120 | config TILEGX |
41dd496c | 121 | def_bool ARCH != "tilepro" |
4ef00aa3 | 122 | select ARCH_SUPPORTS_ATOMIC_RMW |
b26d851f | 123 | select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ |
4ef00aa3 CM |
124 | select HAVE_ARCH_JUMP_LABEL |
125 | select HAVE_ARCH_KGDB | |
a61fd5e3 TL |
126 | select HAVE_DYNAMIC_FTRACE |
127 | select HAVE_FTRACE_MCOUNT_RECORD | |
4ef00aa3 CM |
128 | select HAVE_FUNCTION_GRAPH_TRACER |
129 | select HAVE_FUNCTION_TRACER | |
3fa17c39 TL |
130 | select HAVE_KPROBES |
131 | select HAVE_KRETPROBES | |
4ef00aa3 | 132 | select SPARSE_IRQ |
867e359b | 133 | |
acd1a19e CM |
134 | config TILEPRO |
135 | def_bool !TILEGX | |
136 | ||
867e359b | 137 | config 64BIT |
acd1a19e | 138 | def_bool TILEGX |
867e359b CM |
139 | |
140 | config ARCH_DEFCONFIG | |
141 | string | |
3d1e8a81 | 142 | default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
867e359b CM |
143 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
144 | ||
909d45e6 KS |
145 | config PGTABLE_LEVELS |
146 | int | |
147 | default 3 if 64BIT | |
148 | default 2 | |
149 | ||
867e359b CM |
150 | source "init/Kconfig" |
151 | ||
99a844b7 CM |
152 | source "kernel/Kconfig.freezer" |
153 | ||
867e359b CM |
154 | menu "Tilera-specific configuration" |
155 | ||
156 | config NR_CPUS | |
157 | int "Maximum number of tiles (2-255)" | |
158 | range 2 255 | |
159 | depends on SMP | |
160 | default "64" | |
161 | ---help--- | |
162 | Building with 64 is the recommended value, but a slightly | |
163 | smaller kernel memory footprint results from using a smaller | |
164 | value on chips with fewer tiles. | |
165 | ||
d5d14ed6 CM |
166 | choice |
167 | prompt "Kernel page size" | |
168 | default PAGE_SIZE_64KB | |
169 | help | |
170 | This lets you select the page size of the kernel. For best | |
171 | performance on memory-intensive applications, a page size of 64KB | |
172 | is recommended. For workloads involving many small files, many | |
173 | connections, etc., it may be better to select 16KB, which uses | |
174 | memory more efficiently at some cost in TLB performance. | |
175 | ||
c1b27ab5 CM |
176 | Note that for TILEPro, you must also rebuild the hypervisor |
177 | with a matching page size. | |
178 | ||
179 | config PAGE_SIZE_4KB | |
180 | bool "4KB" if TILEPRO | |
d5d14ed6 CM |
181 | |
182 | config PAGE_SIZE_16KB | |
183 | bool "16KB" | |
184 | ||
185 | config PAGE_SIZE_64KB | |
186 | bool "64KB" | |
187 | ||
188 | endchoice | |
189 | ||
867e359b CM |
190 | source "kernel/Kconfig.hz" |
191 | ||
192 | config KEXEC | |
193 | bool "kexec system call" | |
2965faa5 | 194 | select KEXEC_CORE |
867e359b CM |
195 | ---help--- |
196 | kexec is a system call that implements the ability to shutdown your | |
197 | current kernel, and to start another kernel. It is like a reboot | |
198 | but it is independent of the system firmware. It is used | |
199 | to implement the "mboot" Tilera booter. | |
200 | ||
201 | The name comes from the similarity to the exec system call. | |
202 | ||
203 | config COMPAT | |
204 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
205 | depends on TILEGX | |
206 | select COMPAT_BINFMT_ELF | |
207 | default y | |
208 | ---help--- | |
209 | If enabled, the kernel will support running TILE-Gx binaries | |
210 | that were built with the -m32 option. | |
211 | ||
a0ddef81 CM |
212 | config SECCOMP |
213 | bool "Enable seccomp to safely compute untrusted bytecode" | |
214 | depends on PROC_FS | |
215 | help | |
216 | This kernel feature is useful for number crunching applications | |
217 | that may need to compute untrusted bytecode during their | |
218 | execution. By using pipes or other transports made available to | |
219 | the process as file descriptors supporting the read/write | |
220 | syscalls, it's possible to isolate those applications in | |
221 | their own address space using seccomp. Once seccomp is | |
222 | enabled via prctl, it cannot be disabled and the task is only | |
223 | allowed to execute a few safe syscalls defined by each seccomp | |
224 | mode. | |
225 | ||
226 | If unsure, say N. | |
227 | ||
867e359b CM |
228 | config SYSVIPC_COMPAT |
229 | def_bool y | |
230 | depends on COMPAT && SYSVIPC | |
231 | ||
d7c96611 | 232 | # We do not currently support disabling HIGHMEM on tilepro. |
867e359b CM |
233 | config HIGHMEM |
234 | bool # "Support for more than 512 MB of RAM" | |
235 | default !TILEGX | |
236 | ---help--- | |
237 | Linux can use the full amount of RAM in the system by | |
238 | default. However, the address space of TILE processors is | |
239 | only 4 Gigabytes large. That means that, if you have a large | |
240 | amount of physical memory, not all of it can be "permanently | |
241 | mapped" by the kernel. The physical memory that's not | |
242 | permanently mapped is called "high memory". | |
243 | ||
244 | If you are compiling a kernel which will never run on a | |
245 | machine with more than 512 MB total physical RAM, answer | |
246 | "false" here. This will result in the kernel mapping all of | |
247 | physical memory into the top 1 GB of virtual memory space. | |
248 | ||
249 | If unsure, say "true". | |
250 | ||
eef015c8 CM |
251 | config ZONE_DMA |
252 | def_bool y | |
253 | ||
41bb38fc CM |
254 | config IOMMU_HELPER |
255 | bool | |
256 | ||
257 | config NEED_SG_DMA_LENGTH | |
258 | bool | |
259 | ||
260 | config SWIOTLB | |
261 | bool | |
262 | default TILEGX | |
263 | select IOMMU_HELPER | |
264 | select NEED_SG_DMA_LENGTH | |
265 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
266 | ||
867e359b CM |
267 | # We do not currently support disabling NUMA. |
268 | config NUMA | |
269 | bool # "NUMA Memory Allocation and Scheduler Support" | |
270 | depends on SMP && DISCONTIGMEM | |
271 | default y | |
272 | ---help--- | |
273 | NUMA memory allocation is required for TILE processors | |
274 | unless booting with memory striping enabled in the | |
275 | hypervisor, or with only a single memory controller. | |
276 | It is recommended that this option always be enabled. | |
277 | ||
278 | config NODES_SHIFT | |
279 | int "Log base 2 of the max number of memory controllers" | |
280 | default 2 | |
281 | depends on NEED_MULTIPLE_NODES | |
282 | ---help--- | |
283 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
284 | In a system with more controllers, this value should be raised. | |
285 | ||
867e359b CM |
286 | choice |
287 | depends on !TILEGX | |
6a108a14 | 288 | prompt "Memory split" if EXPERT |
867e359b CM |
289 | default VMSPLIT_3G |
290 | ---help--- | |
291 | Select the desired split between kernel and user memory. | |
292 | ||
293 | If the address range available to the kernel is less than the | |
294 | physical memory installed, the remaining memory will be available | |
295 | as "high memory". Accessing high memory is a little more costly | |
296 | than low memory, as it needs to be mapped into the kernel first. | |
297 | Note that increasing the kernel address space limits the range | |
298 | available to user programs, making the address space there | |
299 | tighter. Selecting anything other than the default 3G/1G split | |
300 | will also likely make your kernel incompatible with binary-only | |
301 | kernel modules. | |
302 | ||
303 | If you are not absolutely sure what you are doing, leave this | |
304 | option alone! | |
305 | ||
5592840b | 306 | config VMSPLIT_3_75G |
867e359b | 307 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 308 | config VMSPLIT_3_5G |
867e359b CM |
309 | bool "3.5G/0.5G user/kernel split" |
310 | config VMSPLIT_3G | |
311 | bool "3G/1G user/kernel split" | |
09c17eab CM |
312 | config VMSPLIT_2_75G |
313 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
314 | config VMSPLIT_2_5G | |
315 | bool "2.5G/1.5G user/kernel split" | |
316 | config VMSPLIT_2_25G | |
317 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
318 | config VMSPLIT_2G |
319 | bool "2G/2G user/kernel split" | |
320 | config VMSPLIT_1G | |
321 | bool "1G/3G user/kernel split" | |
322 | endchoice | |
323 | ||
324 | config PAGE_OFFSET | |
325 | hex | |
884197f7 | 326 | depends on !64BIT |
5592840b CM |
327 | default 0xF0000000 if VMSPLIT_3_75G |
328 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
329 | default 0xB0000000 if VMSPLIT_2_75G |
330 | default 0xA0000000 if VMSPLIT_2_5G | |
331 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
332 | default 0x80000000 if VMSPLIT_2G |
333 | default 0x40000000 if VMSPLIT_1G | |
334 | default 0xC0000000 | |
335 | ||
336 | source "mm/Kconfig" | |
337 | ||
bc1a298f CM |
338 | source "kernel/Kconfig.preempt" |
339 | ||
867e359b CM |
340 | config CMDLINE_BOOL |
341 | bool "Built-in kernel command line" | |
342 | default n | |
343 | ---help--- | |
344 | Allow for specifying boot arguments to the kernel at | |
345 | build time. On some systems (e.g. embedded ones), it is | |
346 | necessary or convenient to provide some or all of the | |
347 | kernel boot arguments with the kernel itself (that is, | |
348 | to not rely on the boot loader to provide them.) | |
349 | ||
350 | To compile command line arguments into the kernel, | |
351 | set this option to 'Y', then fill in the | |
352 | the boot arguments in CONFIG_CMDLINE. | |
353 | ||
354 | Systems with fully functional boot loaders (e.g. mboot, or | |
355 | if booting over PCI) should leave this option set to 'N'. | |
356 | ||
357 | config CMDLINE | |
358 | string "Built-in kernel command string" | |
359 | depends on CMDLINE_BOOL | |
360 | default "" | |
361 | ---help--- | |
362 | Enter arguments here that should be compiled into the kernel | |
363 | image and used at boot time. If the boot loader provides a | |
364 | command line at boot time, it is appended to this string to | |
365 | form the full kernel command line, when the system boots. | |
366 | ||
367 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
368 | change this behavior. | |
369 | ||
370 | In most cases, the command line (whether built-in or provided | |
371 | by the boot loader) should specify the device for the root | |
372 | file system. | |
373 | ||
374 | config CMDLINE_OVERRIDE | |
375 | bool "Built-in command line overrides boot loader arguments" | |
376 | default n | |
377 | depends on CMDLINE_BOOL | |
378 | ---help--- | |
379 | Set this option to 'Y' to have the kernel ignore the boot loader | |
380 | command line, and use ONLY the built-in command line. | |
381 | ||
382 | This is used to work around broken boot loaders. This should | |
383 | be set to 'N' under normal conditions. | |
384 | ||
385 | config VMALLOC_RESERVE | |
386 | hex | |
ad2a4bb3 | 387 | default 0x2000000 |
867e359b | 388 | |
9f9c0382 CM |
389 | config HARDWALL |
390 | bool "Hardwall support to allow access to user dynamic network" | |
391 | default y | |
392 | ||
a78c942d CM |
393 | config KERNEL_PL |
394 | int "Processor protection level for kernel" | |
395 | range 1 2 | |
c539914d CM |
396 | default 2 if TILEGX |
397 | default 1 if !TILEGX | |
a78c942d | 398 | ---help--- |
c539914d CM |
399 | Since MDE 4.2, the Tilera hypervisor runs the kernel |
400 | at PL2 by default. If running under an older hypervisor, | |
401 | or as a KVM guest, you must run at PL1. (The current | |
402 | hypervisor may also be recompiled with "make HV_PL=2" to | |
403 | allow it to run a kernel at PL1, but clients running at PL1 | |
404 | are not expected to be supported indefinitely.) | |
405 | ||
406 | If you're not sure, don't change the default. | |
a78c942d | 407 | |
37b82b5d CM |
408 | source "arch/tile/gxio/Kconfig" |
409 | ||
867e359b CM |
410 | endmenu # Tilera-specific configuration |
411 | ||
412 | menu "Bus options" | |
413 | ||
f02cbbe6 CM |
414 | config PCI |
415 | bool "PCI support" | |
416 | default y | |
417 | select PCI_DOMAINS | |
84550121 | 418 | select GENERIC_PCI_IOMAP |
12962267 | 419 | select TILE_GXIO_TRIO if TILEGX |
12962267 | 420 | select PCI_MSI if TILEGX |
f02cbbe6 CM |
421 | ---help--- |
422 | Enable PCI root complex support, so PCIe endpoint devices can | |
423 | be attached to the Tile chip. Many, but not all, PCI devices | |
424 | are supported under Tilera's root complex driver. | |
425 | ||
426 | config PCI_DOMAINS | |
427 | bool | |
428 | ||
867e359b CM |
429 | config NO_IOMEM |
430 | def_bool !PCI | |
431 | ||
ce816fa8 | 432 | config NO_IOPORT_MAP |
867e359b CM |
433 | def_bool !PCI |
434 | ||
cf89c426 CM |
435 | config TILE_PCI_IO |
436 | bool "PCI I/O space support" | |
437 | default n | |
438 | depends on PCI | |
439 | depends on TILEGX | |
440 | ---help--- | |
441 | Enable PCI I/O space support on TILEGx. Since the PCI I/O space | |
442 | is used by few modern PCIe endpoint devices, its support is disabled | |
443 | by default to save the TRIO PIO Region resource for other purposes. | |
444 | ||
867e359b CM |
445 | source "drivers/pci/Kconfig" |
446 | ||
47fc28bf CM |
447 | config TILE_USB |
448 | tristate "Tilera USB host adapter support" | |
449 | default y | |
450 | depends on USB | |
451 | depends on TILEGX | |
452 | select TILE_GXIO_USB_HOST | |
453 | ---help--- | |
454 | Provides USB host adapter support for the built-in EHCI and OHCI | |
455 | interfaces on TILE-Gx chips. | |
456 | ||
867e359b CM |
457 | endmenu |
458 | ||
459 | menu "Executable file formats" | |
460 | ||
867e359b CM |
461 | source "fs/Kconfig.binfmt" |
462 | ||
463 | endmenu | |
464 | ||
465 | source "net/Kconfig" | |
466 | ||
467 | source "drivers/Kconfig" | |
468 | ||
469 | source "fs/Kconfig" | |
470 | ||
471 | source "arch/tile/Kconfig.debug" | |
472 | ||
473 | source "security/Kconfig" | |
474 | ||
475 | source "crypto/Kconfig" | |
476 | ||
477 | source "lib/Kconfig" | |
a78c942d CM |
478 | |
479 | source "arch/tile/kvm/Kconfig" |