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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 |
5f56a5df | 6 | select HAVE_EXIT_THREAD |
8d61dd7d ZL |
7 | select HAVE_PERF_EVENTS |
8 | select USE_PMC if PERF_EVENTS | |
41bb38fc | 9 | select HAVE_DMA_API_DEBUG |
8df27406 TG |
10 | select HAVE_KVM if !TILEGX |
11 | select GENERIC_FIND_FIRST_BIT | |
7ac57a89 | 12 | select SYSCTL_EXCEPTION_TRACE |
8df27406 | 13 | select CC_OPTIMIZE_FOR_SIZE |
b69ec42b | 14 | select HAVE_DEBUG_KMEMLEAK |
8df27406 TG |
15 | select GENERIC_IRQ_PROBE |
16 | select GENERIC_PENDING_IRQ if SMP | |
61a16741 | 17 | select GENERIC_IRQ_SHOW |
9b2a60c4 | 18 | select HAVE_DEBUG_BUGVERBOSE |
4febd95a | 19 | select VIRT_TO_BUS |
f133ecca | 20 | select SYS_HYPERVISOR |
446f24d1 | 21 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
21266be9 | 22 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
8d695143 | 23 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4ec008d6 | 24 | select GENERIC_CLOCKEVENTS |
786d35d4 | 25 | select MODULES_USE_ELF_RELA |
969f6fe6 | 26 | select HAVE_ARCH_TRACEHOOK |
ef567f25 | 27 | select HAVE_SYSCALL_TRACEPOINTS |
47ad7b9b | 28 | select USER_STACKTRACE_SUPPORT |
adf6d9b3 | 29 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
d1a1dc0b | 30 | select HAVE_DEBUG_STACKOVERFLOW |
49cf78ef | 31 | select ARCH_WANT_FRAME_POINTERS |
49e4e156 | 32 | select HAVE_CONTEXT_TRACKING |
42a0bb3f | 33 | select HAVE_NMI if USE_PMC |
b01aec9b | 34 | select EDAC_SUPPORT |
5bf6c07a CM |
35 | select GENERIC_STRNCPY_FROM_USER |
36 | select GENERIC_STRNLEN_USER | |
a0ddef81 | 37 | select HAVE_ARCH_SECCOMP_FILTER |
867e359b | 38 | |
8df27406 TG |
39 | # FIXME: investigate whether we need/want these options. |
40 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
41 | # select HAVE_OPTPROBES |
42 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
43 | # select HAVE_HW_BREAKPOINT | |
44 | # select PERF_EVENTS | |
45 | # select HAVE_USER_RETURN_NOTIFIER | |
46 | # config NO_BOOTMEM | |
47 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
48 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 49 | |
8df27406 | 50 | config MMU |
867e359b CM |
51 | def_bool y |
52 | ||
8df27406 | 53 | config GENERIC_CSUM |
867e359b | 54 | def_bool y |
867e359b | 55 | |
867e359b CM |
56 | config HAVE_ARCH_ALLOC_REMAP |
57 | def_bool y | |
58 | ||
59 | config HAVE_SETUP_PER_CPU_AREA | |
60 | def_bool y | |
61 | ||
62 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 63 | def_bool y |
867e359b CM |
64 | |
65 | config SYS_SUPPORTS_HUGETLBFS | |
66 | def_bool y | |
67 | ||
621b1955 CM |
68 | # Support for additional huge page sizes besides HPAGE_SIZE. |
69 | # The software support is currently only present in the TILE-Gx | |
70 | # hypervisor. TILEPro in any case does not support page sizes | |
71 | # larger than the default HPAGE_SIZE. | |
72 | config HUGETLB_SUPER_PAGES | |
73 | depends on HUGETLB_PAGE && TILEGX | |
74 | def_bool y | |
75 | ||
4a556f4f CM |
76 | config GENERIC_TIME_VSYSCALL |
77 | def_bool y | |
78 | ||
8e3441eb ZL |
79 | # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled. |
80 | config USE_PMC | |
81 | bool | |
82 | ||
25985edc | 83 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
84 | config RWSEM_GENERIC_SPINLOCK |
85 | def_bool y | |
86 | ||
867e359b CM |
87 | # We only support gcc 4.4 and above, so this should work. |
88 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
89 | def_bool y | |
90 | ||
91 | config ARCH_PHYS_ADDR_T_64BIT | |
92 | def_bool y | |
93 | ||
d31eb519 FT |
94 | config ARCH_DMA_ADDR_T_64BIT |
95 | def_bool y | |
96 | ||
3d1e8a81 CM |
97 | config NEED_DMA_MAP_STATE |
98 | def_bool y | |
99 | ||
41bb38fc CM |
100 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
101 | bool | |
102 | ||
867e359b CM |
103 | config LOCKDEP_SUPPORT |
104 | def_bool y | |
105 | ||
106 | config STACKTRACE_SUPPORT | |
107 | def_bool y | |
108 | select STACKTRACE | |
109 | ||
110 | # We use discontigmem for now; at some point we may want to switch | |
111 | # to sparsemem (Tilera bug 7996). | |
112 | config ARCH_DISCONTIGMEM_ENABLE | |
113 | def_bool y | |
114 | ||
115 | config ARCH_DISCONTIGMEM_DEFAULT | |
116 | def_bool y | |
117 | ||
118 | config TRACE_IRQFLAGS_SUPPORT | |
119 | def_bool y | |
120 | ||
867e359b CM |
121 | # SMP is required for Tilera Linux. |
122 | config SMP | |
123 | def_bool y | |
124 | ||
867e359b | 125 | config HVC_TILE |
4f73bc4d | 126 | depends on TTY |
867e359b | 127 | select HVC_DRIVER |
bda0f5ba | 128 | select HVC_IRQ if TILEGX |
867e359b CM |
129 | def_bool y |
130 | ||
41dd496c CM |
131 | # Building with ARCH=tilegx (or ARCH=tile) implies using the |
132 | # 64-bit TILE-Gx toolchain, so force CONFIG_TILEGX on. | |
867e359b | 133 | config TILEGX |
41dd496c | 134 | def_bool ARCH != "tilepro" |
b26d851f TG |
135 | select SPARSE_IRQ |
136 | select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ | |
a61fd5e3 | 137 | select HAVE_FUNCTION_TRACER |
a61fd5e3 TL |
138 | select HAVE_FUNCTION_GRAPH_TRACER |
139 | select HAVE_DYNAMIC_FTRACE | |
140 | select HAVE_FTRACE_MCOUNT_RECORD | |
3fa17c39 TL |
141 | select HAVE_KPROBES |
142 | select HAVE_KRETPROBES | |
8157107b | 143 | select HAVE_ARCH_KGDB |
3e24765d | 144 | select ARCH_SUPPORTS_ATOMIC_RMW |
65a792e8 | 145 | select HAVE_ARCH_JUMP_LABEL |
867e359b | 146 | |
acd1a19e CM |
147 | config TILEPRO |
148 | def_bool !TILEGX | |
149 | ||
867e359b | 150 | config 64BIT |
acd1a19e | 151 | def_bool TILEGX |
867e359b CM |
152 | |
153 | config ARCH_DEFCONFIG | |
154 | string | |
3d1e8a81 | 155 | default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
867e359b CM |
156 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
157 | ||
909d45e6 KS |
158 | config PGTABLE_LEVELS |
159 | int | |
160 | default 3 if 64BIT | |
161 | default 2 | |
162 | ||
867e359b CM |
163 | source "init/Kconfig" |
164 | ||
99a844b7 CM |
165 | source "kernel/Kconfig.freezer" |
166 | ||
867e359b CM |
167 | menu "Tilera-specific configuration" |
168 | ||
169 | config NR_CPUS | |
170 | int "Maximum number of tiles (2-255)" | |
171 | range 2 255 | |
172 | depends on SMP | |
173 | default "64" | |
174 | ---help--- | |
175 | Building with 64 is the recommended value, but a slightly | |
176 | smaller kernel memory footprint results from using a smaller | |
177 | value on chips with fewer tiles. | |
178 | ||
d5d14ed6 CM |
179 | choice |
180 | prompt "Kernel page size" | |
181 | default PAGE_SIZE_64KB | |
182 | help | |
183 | This lets you select the page size of the kernel. For best | |
184 | performance on memory-intensive applications, a page size of 64KB | |
185 | is recommended. For workloads involving many small files, many | |
186 | connections, etc., it may be better to select 16KB, which uses | |
187 | memory more efficiently at some cost in TLB performance. | |
188 | ||
c1b27ab5 CM |
189 | Note that for TILEPro, you must also rebuild the hypervisor |
190 | with a matching page size. | |
191 | ||
192 | config PAGE_SIZE_4KB | |
193 | bool "4KB" if TILEPRO | |
d5d14ed6 CM |
194 | |
195 | config PAGE_SIZE_16KB | |
196 | bool "16KB" | |
197 | ||
198 | config PAGE_SIZE_64KB | |
199 | bool "64KB" | |
200 | ||
201 | endchoice | |
202 | ||
867e359b CM |
203 | source "kernel/Kconfig.hz" |
204 | ||
205 | config KEXEC | |
206 | bool "kexec system call" | |
2965faa5 | 207 | select KEXEC_CORE |
867e359b CM |
208 | ---help--- |
209 | kexec is a system call that implements the ability to shutdown your | |
210 | current kernel, and to start another kernel. It is like a reboot | |
211 | but it is independent of the system firmware. It is used | |
212 | to implement the "mboot" Tilera booter. | |
213 | ||
214 | The name comes from the similarity to the exec system call. | |
215 | ||
216 | config COMPAT | |
217 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
218 | depends on TILEGX | |
219 | select COMPAT_BINFMT_ELF | |
220 | default y | |
221 | ---help--- | |
222 | If enabled, the kernel will support running TILE-Gx binaries | |
223 | that were built with the -m32 option. | |
224 | ||
a0ddef81 CM |
225 | config SECCOMP |
226 | bool "Enable seccomp to safely compute untrusted bytecode" | |
227 | depends on PROC_FS | |
228 | help | |
229 | This kernel feature is useful for number crunching applications | |
230 | that may need to compute untrusted bytecode during their | |
231 | execution. By using pipes or other transports made available to | |
232 | the process as file descriptors supporting the read/write | |
233 | syscalls, it's possible to isolate those applications in | |
234 | their own address space using seccomp. Once seccomp is | |
235 | enabled via prctl, it cannot be disabled and the task is only | |
236 | allowed to execute a few safe syscalls defined by each seccomp | |
237 | mode. | |
238 | ||
239 | If unsure, say N. | |
240 | ||
867e359b CM |
241 | config SYSVIPC_COMPAT |
242 | def_bool y | |
243 | depends on COMPAT && SYSVIPC | |
244 | ||
d7c96611 | 245 | # We do not currently support disabling HIGHMEM on tilepro. |
867e359b CM |
246 | config HIGHMEM |
247 | bool # "Support for more than 512 MB of RAM" | |
248 | default !TILEGX | |
249 | ---help--- | |
250 | Linux can use the full amount of RAM in the system by | |
251 | default. However, the address space of TILE processors is | |
252 | only 4 Gigabytes large. That means that, if you have a large | |
253 | amount of physical memory, not all of it can be "permanently | |
254 | mapped" by the kernel. The physical memory that's not | |
255 | permanently mapped is called "high memory". | |
256 | ||
257 | If you are compiling a kernel which will never run on a | |
258 | machine with more than 512 MB total physical RAM, answer | |
259 | "false" here. This will result in the kernel mapping all of | |
260 | physical memory into the top 1 GB of virtual memory space. | |
261 | ||
262 | If unsure, say "true". | |
263 | ||
eef015c8 CM |
264 | config ZONE_DMA |
265 | def_bool y | |
266 | ||
41bb38fc CM |
267 | config IOMMU_HELPER |
268 | bool | |
269 | ||
270 | config NEED_SG_DMA_LENGTH | |
271 | bool | |
272 | ||
273 | config SWIOTLB | |
274 | bool | |
275 | default TILEGX | |
276 | select IOMMU_HELPER | |
277 | select NEED_SG_DMA_LENGTH | |
278 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
279 | ||
867e359b CM |
280 | # We do not currently support disabling NUMA. |
281 | config NUMA | |
282 | bool # "NUMA Memory Allocation and Scheduler Support" | |
283 | depends on SMP && DISCONTIGMEM | |
284 | default y | |
285 | ---help--- | |
286 | NUMA memory allocation is required for TILE processors | |
287 | unless booting with memory striping enabled in the | |
288 | hypervisor, or with only a single memory controller. | |
289 | It is recommended that this option always be enabled. | |
290 | ||
291 | config NODES_SHIFT | |
292 | int "Log base 2 of the max number of memory controllers" | |
293 | default 2 | |
294 | depends on NEED_MULTIPLE_NODES | |
295 | ---help--- | |
296 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
297 | In a system with more controllers, this value should be raised. | |
298 | ||
867e359b CM |
299 | choice |
300 | depends on !TILEGX | |
6a108a14 | 301 | prompt "Memory split" if EXPERT |
867e359b CM |
302 | default VMSPLIT_3G |
303 | ---help--- | |
304 | Select the desired split between kernel and user memory. | |
305 | ||
306 | If the address range available to the kernel is less than the | |
307 | physical memory installed, the remaining memory will be available | |
308 | as "high memory". Accessing high memory is a little more costly | |
309 | than low memory, as it needs to be mapped into the kernel first. | |
310 | Note that increasing the kernel address space limits the range | |
311 | available to user programs, making the address space there | |
312 | tighter. Selecting anything other than the default 3G/1G split | |
313 | will also likely make your kernel incompatible with binary-only | |
314 | kernel modules. | |
315 | ||
316 | If you are not absolutely sure what you are doing, leave this | |
317 | option alone! | |
318 | ||
5592840b | 319 | config VMSPLIT_3_75G |
867e359b | 320 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 321 | config VMSPLIT_3_5G |
867e359b CM |
322 | bool "3.5G/0.5G user/kernel split" |
323 | config VMSPLIT_3G | |
324 | bool "3G/1G user/kernel split" | |
09c17eab CM |
325 | config VMSPLIT_2_75G |
326 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
327 | config VMSPLIT_2_5G | |
328 | bool "2.5G/1.5G user/kernel split" | |
329 | config VMSPLIT_2_25G | |
330 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
331 | config VMSPLIT_2G |
332 | bool "2G/2G user/kernel split" | |
333 | config VMSPLIT_1G | |
334 | bool "1G/3G user/kernel split" | |
335 | endchoice | |
336 | ||
337 | config PAGE_OFFSET | |
338 | hex | |
884197f7 | 339 | depends on !64BIT |
5592840b CM |
340 | default 0xF0000000 if VMSPLIT_3_75G |
341 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
342 | default 0xB0000000 if VMSPLIT_2_75G |
343 | default 0xA0000000 if VMSPLIT_2_5G | |
344 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
345 | default 0x80000000 if VMSPLIT_2G |
346 | default 0x40000000 if VMSPLIT_1G | |
347 | default 0xC0000000 | |
348 | ||
349 | source "mm/Kconfig" | |
350 | ||
bc1a298f CM |
351 | source "kernel/Kconfig.preempt" |
352 | ||
867e359b CM |
353 | config CMDLINE_BOOL |
354 | bool "Built-in kernel command line" | |
355 | default n | |
356 | ---help--- | |
357 | Allow for specifying boot arguments to the kernel at | |
358 | build time. On some systems (e.g. embedded ones), it is | |
359 | necessary or convenient to provide some or all of the | |
360 | kernel boot arguments with the kernel itself (that is, | |
361 | to not rely on the boot loader to provide them.) | |
362 | ||
363 | To compile command line arguments into the kernel, | |
364 | set this option to 'Y', then fill in the | |
365 | the boot arguments in CONFIG_CMDLINE. | |
366 | ||
367 | Systems with fully functional boot loaders (e.g. mboot, or | |
368 | if booting over PCI) should leave this option set to 'N'. | |
369 | ||
370 | config CMDLINE | |
371 | string "Built-in kernel command string" | |
372 | depends on CMDLINE_BOOL | |
373 | default "" | |
374 | ---help--- | |
375 | Enter arguments here that should be compiled into the kernel | |
376 | image and used at boot time. If the boot loader provides a | |
377 | command line at boot time, it is appended to this string to | |
378 | form the full kernel command line, when the system boots. | |
379 | ||
380 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
381 | change this behavior. | |
382 | ||
383 | In most cases, the command line (whether built-in or provided | |
384 | by the boot loader) should specify the device for the root | |
385 | file system. | |
386 | ||
387 | config CMDLINE_OVERRIDE | |
388 | bool "Built-in command line overrides boot loader arguments" | |
389 | default n | |
390 | depends on CMDLINE_BOOL | |
391 | ---help--- | |
392 | Set this option to 'Y' to have the kernel ignore the boot loader | |
393 | command line, and use ONLY the built-in command line. | |
394 | ||
395 | This is used to work around broken boot loaders. This should | |
396 | be set to 'N' under normal conditions. | |
397 | ||
398 | config VMALLOC_RESERVE | |
399 | hex | |
ad2a4bb3 | 400 | default 0x2000000 |
867e359b | 401 | |
9f9c0382 CM |
402 | config HARDWALL |
403 | bool "Hardwall support to allow access to user dynamic network" | |
404 | default y | |
405 | ||
a78c942d CM |
406 | config KERNEL_PL |
407 | int "Processor protection level for kernel" | |
408 | range 1 2 | |
c539914d CM |
409 | default 2 if TILEGX |
410 | default 1 if !TILEGX | |
a78c942d | 411 | ---help--- |
c539914d CM |
412 | Since MDE 4.2, the Tilera hypervisor runs the kernel |
413 | at PL2 by default. If running under an older hypervisor, | |
414 | or as a KVM guest, you must run at PL1. (The current | |
415 | hypervisor may also be recompiled with "make HV_PL=2" to | |
416 | allow it to run a kernel at PL1, but clients running at PL1 | |
417 | are not expected to be supported indefinitely.) | |
418 | ||
419 | If you're not sure, don't change the default. | |
a78c942d | 420 | |
37b82b5d CM |
421 | source "arch/tile/gxio/Kconfig" |
422 | ||
867e359b CM |
423 | endmenu # Tilera-specific configuration |
424 | ||
425 | menu "Bus options" | |
426 | ||
f02cbbe6 CM |
427 | config PCI |
428 | bool "PCI support" | |
429 | default y | |
430 | select PCI_DOMAINS | |
84550121 | 431 | select GENERIC_PCI_IOMAP |
12962267 | 432 | select TILE_GXIO_TRIO if TILEGX |
12962267 | 433 | select PCI_MSI if TILEGX |
f02cbbe6 CM |
434 | ---help--- |
435 | Enable PCI root complex support, so PCIe endpoint devices can | |
436 | be attached to the Tile chip. Many, but not all, PCI devices | |
437 | are supported under Tilera's root complex driver. | |
438 | ||
439 | config PCI_DOMAINS | |
440 | bool | |
441 | ||
867e359b CM |
442 | config NO_IOMEM |
443 | def_bool !PCI | |
444 | ||
ce816fa8 | 445 | config NO_IOPORT_MAP |
867e359b CM |
446 | def_bool !PCI |
447 | ||
cf89c426 CM |
448 | config TILE_PCI_IO |
449 | bool "PCI I/O space support" | |
450 | default n | |
451 | depends on PCI | |
452 | depends on TILEGX | |
453 | ---help--- | |
454 | Enable PCI I/O space support on TILEGx. Since the PCI I/O space | |
455 | is used by few modern PCIe endpoint devices, its support is disabled | |
456 | by default to save the TRIO PIO Region resource for other purposes. | |
457 | ||
867e359b CM |
458 | source "drivers/pci/Kconfig" |
459 | ||
47fc28bf CM |
460 | config TILE_USB |
461 | tristate "Tilera USB host adapter support" | |
462 | default y | |
463 | depends on USB | |
464 | depends on TILEGX | |
465 | select TILE_GXIO_USB_HOST | |
466 | ---help--- | |
467 | Provides USB host adapter support for the built-in EHCI and OHCI | |
468 | interfaces on TILE-Gx chips. | |
469 | ||
867e359b CM |
470 | endmenu |
471 | ||
472 | menu "Executable file formats" | |
473 | ||
867e359b CM |
474 | source "fs/Kconfig.binfmt" |
475 | ||
476 | endmenu | |
477 | ||
478 | source "net/Kconfig" | |
479 | ||
480 | source "drivers/Kconfig" | |
481 | ||
482 | source "fs/Kconfig" | |
483 | ||
484 | source "arch/tile/Kconfig.debug" | |
485 | ||
486 | source "security/Kconfig" | |
487 | ||
488 | source "crypto/Kconfig" | |
489 | ||
490 | source "lib/Kconfig" | |
a78c942d CM |
491 | |
492 | source "arch/tile/kvm/Kconfig" |