Commit | Line | Data |
---|---|---|
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 |
8d61dd7d ZL |
6 | select HAVE_PERF_EVENTS |
7 | select USE_PMC if PERF_EVENTS | |
41bb38fc CM |
8 | select HAVE_DMA_ATTRS |
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 |
8d695143 | 22 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4ec008d6 | 23 | select GENERIC_CLOCKEVENTS |
786d35d4 | 24 | select MODULES_USE_ELF_RELA |
969f6fe6 | 25 | select HAVE_ARCH_TRACEHOOK |
ef567f25 | 26 | select HAVE_SYSCALL_TRACEPOINTS |
47ad7b9b | 27 | select USER_STACKTRACE_SUPPORT |
adf6d9b3 | 28 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
d1a1dc0b | 29 | select HAVE_DEBUG_STACKOVERFLOW |
49cf78ef | 30 | select ARCH_WANT_FRAME_POINTERS |
49e4e156 | 31 | select HAVE_CONTEXT_TRACKING |
b01aec9b | 32 | select EDAC_SUPPORT |
5bf6c07a CM |
33 | select GENERIC_STRNCPY_FROM_USER |
34 | select GENERIC_STRNLEN_USER | |
a0ddef81 | 35 | select HAVE_ARCH_SECCOMP_FILTER |
867e359b | 36 | |
8df27406 TG |
37 | # FIXME: investigate whether we need/want these options. |
38 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
39 | # select HAVE_OPTPROBES |
40 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
41 | # select HAVE_HW_BREAKPOINT | |
42 | # select PERF_EVENTS | |
43 | # select HAVE_USER_RETURN_NOTIFIER | |
44 | # config NO_BOOTMEM | |
45 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
46 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 47 | |
8df27406 | 48 | config MMU |
867e359b CM |
49 | def_bool y |
50 | ||
8df27406 | 51 | config GENERIC_CSUM |
867e359b | 52 | def_bool y |
867e359b | 53 | |
867e359b CM |
54 | config HAVE_ARCH_ALLOC_REMAP |
55 | def_bool y | |
56 | ||
57 | config HAVE_SETUP_PER_CPU_AREA | |
58 | def_bool y | |
59 | ||
60 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 61 | def_bool y |
867e359b CM |
62 | |
63 | config SYS_SUPPORTS_HUGETLBFS | |
64 | def_bool y | |
65 | ||
621b1955 CM |
66 | # Support for additional huge page sizes besides HPAGE_SIZE. |
67 | # The software support is currently only present in the TILE-Gx | |
68 | # hypervisor. TILEPro in any case does not support page sizes | |
69 | # larger than the default HPAGE_SIZE. | |
70 | config HUGETLB_SUPER_PAGES | |
71 | depends on HUGETLB_PAGE && TILEGX | |
72 | def_bool y | |
73 | ||
4a556f4f CM |
74 | config GENERIC_TIME_VSYSCALL |
75 | def_bool y | |
76 | ||
8e3441eb ZL |
77 | # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled. |
78 | config USE_PMC | |
79 | bool | |
80 | ||
25985edc | 81 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
82 | config RWSEM_GENERIC_SPINLOCK |
83 | def_bool y | |
84 | ||
867e359b CM |
85 | # We only support gcc 4.4 and above, so this should work. |
86 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
87 | def_bool y | |
88 | ||
89 | config ARCH_PHYS_ADDR_T_64BIT | |
90 | def_bool y | |
91 | ||
d31eb519 FT |
92 | config ARCH_DMA_ADDR_T_64BIT |
93 | def_bool y | |
94 | ||
3d1e8a81 CM |
95 | config NEED_DMA_MAP_STATE |
96 | def_bool y | |
97 | ||
41bb38fc CM |
98 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
99 | bool | |
100 | ||
867e359b CM |
101 | config LOCKDEP_SUPPORT |
102 | def_bool y | |
103 | ||
104 | config STACKTRACE_SUPPORT | |
105 | def_bool y | |
106 | select STACKTRACE | |
107 | ||
108 | # We use discontigmem for now; at some point we may want to switch | |
109 | # to sparsemem (Tilera bug 7996). | |
110 | config ARCH_DISCONTIGMEM_ENABLE | |
111 | def_bool y | |
112 | ||
113 | config ARCH_DISCONTIGMEM_DEFAULT | |
114 | def_bool y | |
115 | ||
116 | config TRACE_IRQFLAGS_SUPPORT | |
117 | def_bool y | |
118 | ||
119 | config STRICT_DEVMEM | |
120 | def_bool y | |
121 | ||
122 | # SMP is required for Tilera Linux. | |
123 | config SMP | |
124 | def_bool y | |
125 | ||
867e359b | 126 | config HVC_TILE |
4f73bc4d | 127 | depends on TTY |
867e359b | 128 | select HVC_DRIVER |
bda0f5ba | 129 | select HVC_IRQ if TILEGX |
867e359b CM |
130 | def_bool y |
131 | ||
41dd496c CM |
132 | # Building with ARCH=tilegx (or ARCH=tile) implies using the |
133 | # 64-bit TILE-Gx toolchain, so force CONFIG_TILEGX on. | |
867e359b | 134 | config TILEGX |
41dd496c | 135 | def_bool ARCH != "tilepro" |
b26d851f TG |
136 | select SPARSE_IRQ |
137 | select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ | |
a61fd5e3 | 138 | select HAVE_FUNCTION_TRACER |
a61fd5e3 TL |
139 | select HAVE_FUNCTION_GRAPH_TRACER |
140 | select HAVE_DYNAMIC_FTRACE | |
141 | select HAVE_FTRACE_MCOUNT_RECORD | |
3fa17c39 TL |
142 | select HAVE_KPROBES |
143 | select HAVE_KRETPROBES | |
8157107b | 144 | select HAVE_ARCH_KGDB |
3e24765d | 145 | select ARCH_SUPPORTS_ATOMIC_RMW |
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 | if TILEGX |
180 | ||
181 | choice | |
182 | prompt "Kernel page size" | |
183 | default PAGE_SIZE_64KB | |
184 | help | |
185 | This lets you select the page size of the kernel. For best | |
186 | performance on memory-intensive applications, a page size of 64KB | |
187 | is recommended. For workloads involving many small files, many | |
188 | connections, etc., it may be better to select 16KB, which uses | |
189 | memory more efficiently at some cost in TLB performance. | |
190 | ||
191 | Note that this option is TILE-Gx specific; currently | |
192 | TILEPro page size is set by rebuilding the hypervisor. | |
193 | ||
194 | config PAGE_SIZE_16KB | |
195 | bool "16KB" | |
196 | ||
197 | config PAGE_SIZE_64KB | |
198 | bool "64KB" | |
199 | ||
200 | endchoice | |
201 | ||
202 | endif | |
203 | ||
867e359b CM |
204 | source "kernel/Kconfig.hz" |
205 | ||
206 | config KEXEC | |
207 | bool "kexec system call" | |
2965faa5 | 208 | select KEXEC_CORE |
867e359b CM |
209 | ---help--- |
210 | kexec is a system call that implements the ability to shutdown your | |
211 | current kernel, and to start another kernel. It is like a reboot | |
212 | but it is independent of the system firmware. It is used | |
213 | to implement the "mboot" Tilera booter. | |
214 | ||
215 | The name comes from the similarity to the exec system call. | |
216 | ||
217 | config COMPAT | |
218 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
219 | depends on TILEGX | |
220 | select COMPAT_BINFMT_ELF | |
221 | default y | |
222 | ---help--- | |
223 | If enabled, the kernel will support running TILE-Gx binaries | |
224 | that were built with the -m32 option. | |
225 | ||
a0ddef81 CM |
226 | config SECCOMP |
227 | bool "Enable seccomp to safely compute untrusted bytecode" | |
228 | depends on PROC_FS | |
229 | help | |
230 | This kernel feature is useful for number crunching applications | |
231 | that may need to compute untrusted bytecode during their | |
232 | execution. By using pipes or other transports made available to | |
233 | the process as file descriptors supporting the read/write | |
234 | syscalls, it's possible to isolate those applications in | |
235 | their own address space using seccomp. Once seccomp is | |
236 | enabled via prctl, it cannot be disabled and the task is only | |
237 | allowed to execute a few safe syscalls defined by each seccomp | |
238 | mode. | |
239 | ||
240 | If unsure, say N. | |
241 | ||
867e359b CM |
242 | config SYSVIPC_COMPAT |
243 | def_bool y | |
244 | depends on COMPAT && SYSVIPC | |
245 | ||
d7c96611 | 246 | # We do not currently support disabling HIGHMEM on tilepro. |
867e359b CM |
247 | config HIGHMEM |
248 | bool # "Support for more than 512 MB of RAM" | |
249 | default !TILEGX | |
250 | ---help--- | |
251 | Linux can use the full amount of RAM in the system by | |
252 | default. However, the address space of TILE processors is | |
253 | only 4 Gigabytes large. That means that, if you have a large | |
254 | amount of physical memory, not all of it can be "permanently | |
255 | mapped" by the kernel. The physical memory that's not | |
256 | permanently mapped is called "high memory". | |
257 | ||
258 | If you are compiling a kernel which will never run on a | |
259 | machine with more than 512 MB total physical RAM, answer | |
260 | "false" here. This will result in the kernel mapping all of | |
261 | physical memory into the top 1 GB of virtual memory space. | |
262 | ||
263 | If unsure, say "true". | |
264 | ||
eef015c8 CM |
265 | config ZONE_DMA |
266 | def_bool y | |
267 | ||
41bb38fc CM |
268 | config IOMMU_HELPER |
269 | bool | |
270 | ||
271 | config NEED_SG_DMA_LENGTH | |
272 | bool | |
273 | ||
274 | config SWIOTLB | |
275 | bool | |
276 | default TILEGX | |
277 | select IOMMU_HELPER | |
278 | select NEED_SG_DMA_LENGTH | |
279 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
280 | ||
867e359b CM |
281 | # We do not currently support disabling NUMA. |
282 | config NUMA | |
283 | bool # "NUMA Memory Allocation and Scheduler Support" | |
284 | depends on SMP && DISCONTIGMEM | |
285 | default y | |
286 | ---help--- | |
287 | NUMA memory allocation is required for TILE processors | |
288 | unless booting with memory striping enabled in the | |
289 | hypervisor, or with only a single memory controller. | |
290 | It is recommended that this option always be enabled. | |
291 | ||
292 | config NODES_SHIFT | |
293 | int "Log base 2 of the max number of memory controllers" | |
294 | default 2 | |
295 | depends on NEED_MULTIPLE_NODES | |
296 | ---help--- | |
297 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
298 | In a system with more controllers, this value should be raised. | |
299 | ||
867e359b CM |
300 | choice |
301 | depends on !TILEGX | |
6a108a14 | 302 | prompt "Memory split" if EXPERT |
867e359b CM |
303 | default VMSPLIT_3G |
304 | ---help--- | |
305 | Select the desired split between kernel and user memory. | |
306 | ||
307 | If the address range available to the kernel is less than the | |
308 | physical memory installed, the remaining memory will be available | |
309 | as "high memory". Accessing high memory is a little more costly | |
310 | than low memory, as it needs to be mapped into the kernel first. | |
311 | Note that increasing the kernel address space limits the range | |
312 | available to user programs, making the address space there | |
313 | tighter. Selecting anything other than the default 3G/1G split | |
314 | will also likely make your kernel incompatible with binary-only | |
315 | kernel modules. | |
316 | ||
317 | If you are not absolutely sure what you are doing, leave this | |
318 | option alone! | |
319 | ||
5592840b | 320 | config VMSPLIT_3_75G |
867e359b | 321 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 322 | config VMSPLIT_3_5G |
867e359b CM |
323 | bool "3.5G/0.5G user/kernel split" |
324 | config VMSPLIT_3G | |
325 | bool "3G/1G user/kernel split" | |
09c17eab CM |
326 | config VMSPLIT_2_75G |
327 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
328 | config VMSPLIT_2_5G | |
329 | bool "2.5G/1.5G user/kernel split" | |
330 | config VMSPLIT_2_25G | |
331 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
332 | config VMSPLIT_2G |
333 | bool "2G/2G user/kernel split" | |
334 | config VMSPLIT_1G | |
335 | bool "1G/3G user/kernel split" | |
336 | endchoice | |
337 | ||
338 | config PAGE_OFFSET | |
339 | hex | |
884197f7 | 340 | depends on !64BIT |
5592840b CM |
341 | default 0xF0000000 if VMSPLIT_3_75G |
342 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
343 | default 0xB0000000 if VMSPLIT_2_75G |
344 | default 0xA0000000 if VMSPLIT_2_5G | |
345 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
346 | default 0x80000000 if VMSPLIT_2G |
347 | default 0x40000000 if VMSPLIT_1G | |
348 | default 0xC0000000 | |
349 | ||
350 | source "mm/Kconfig" | |
351 | ||
bc1a298f CM |
352 | source "kernel/Kconfig.preempt" |
353 | ||
867e359b CM |
354 | config CMDLINE_BOOL |
355 | bool "Built-in kernel command line" | |
356 | default n | |
357 | ---help--- | |
358 | Allow for specifying boot arguments to the kernel at | |
359 | build time. On some systems (e.g. embedded ones), it is | |
360 | necessary or convenient to provide some or all of the | |
361 | kernel boot arguments with the kernel itself (that is, | |
362 | to not rely on the boot loader to provide them.) | |
363 | ||
364 | To compile command line arguments into the kernel, | |
365 | set this option to 'Y', then fill in the | |
366 | the boot arguments in CONFIG_CMDLINE. | |
367 | ||
368 | Systems with fully functional boot loaders (e.g. mboot, or | |
369 | if booting over PCI) should leave this option set to 'N'. | |
370 | ||
371 | config CMDLINE | |
372 | string "Built-in kernel command string" | |
373 | depends on CMDLINE_BOOL | |
374 | default "" | |
375 | ---help--- | |
376 | Enter arguments here that should be compiled into the kernel | |
377 | image and used at boot time. If the boot loader provides a | |
378 | command line at boot time, it is appended to this string to | |
379 | form the full kernel command line, when the system boots. | |
380 | ||
381 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
382 | change this behavior. | |
383 | ||
384 | In most cases, the command line (whether built-in or provided | |
385 | by the boot loader) should specify the device for the root | |
386 | file system. | |
387 | ||
388 | config CMDLINE_OVERRIDE | |
389 | bool "Built-in command line overrides boot loader arguments" | |
390 | default n | |
391 | depends on CMDLINE_BOOL | |
392 | ---help--- | |
393 | Set this option to 'Y' to have the kernel ignore the boot loader | |
394 | command line, and use ONLY the built-in command line. | |
395 | ||
396 | This is used to work around broken boot loaders. This should | |
397 | be set to 'N' under normal conditions. | |
398 | ||
399 | config VMALLOC_RESERVE | |
400 | hex | |
ad2a4bb3 | 401 | default 0x2000000 |
867e359b | 402 | |
9f9c0382 CM |
403 | config HARDWALL |
404 | bool "Hardwall support to allow access to user dynamic network" | |
405 | default y | |
406 | ||
a78c942d CM |
407 | config KERNEL_PL |
408 | int "Processor protection level for kernel" | |
409 | range 1 2 | |
c539914d CM |
410 | default 2 if TILEGX |
411 | default 1 if !TILEGX | |
a78c942d | 412 | ---help--- |
c539914d CM |
413 | Since MDE 4.2, the Tilera hypervisor runs the kernel |
414 | at PL2 by default. If running under an older hypervisor, | |
415 | or as a KVM guest, you must run at PL1. (The current | |
416 | hypervisor may also be recompiled with "make HV_PL=2" to | |
417 | allow it to run a kernel at PL1, but clients running at PL1 | |
418 | are not expected to be supported indefinitely.) | |
419 | ||
420 | If you're not sure, don't change the default. | |
a78c942d | 421 | |
37b82b5d CM |
422 | source "arch/tile/gxio/Kconfig" |
423 | ||
867e359b CM |
424 | endmenu # Tilera-specific configuration |
425 | ||
426 | menu "Bus options" | |
427 | ||
f02cbbe6 CM |
428 | config PCI |
429 | bool "PCI support" | |
430 | default y | |
431 | select PCI_DOMAINS | |
84550121 | 432 | select GENERIC_PCI_IOMAP |
12962267 | 433 | select TILE_GXIO_TRIO if TILEGX |
12962267 | 434 | select PCI_MSI if TILEGX |
f02cbbe6 CM |
435 | ---help--- |
436 | Enable PCI root complex support, so PCIe endpoint devices can | |
437 | be attached to the Tile chip. Many, but not all, PCI devices | |
438 | are supported under Tilera's root complex driver. | |
439 | ||
440 | config PCI_DOMAINS | |
441 | bool | |
442 | ||
867e359b CM |
443 | config NO_IOMEM |
444 | def_bool !PCI | |
445 | ||
ce816fa8 | 446 | config NO_IOPORT_MAP |
867e359b CM |
447 | def_bool !PCI |
448 | ||
cf89c426 CM |
449 | config TILE_PCI_IO |
450 | bool "PCI I/O space support" | |
451 | default n | |
452 | depends on PCI | |
453 | depends on TILEGX | |
454 | ---help--- | |
455 | Enable PCI I/O space support on TILEGx. Since the PCI I/O space | |
456 | is used by few modern PCIe endpoint devices, its support is disabled | |
457 | by default to save the TRIO PIO Region resource for other purposes. | |
458 | ||
867e359b CM |
459 | source "drivers/pci/Kconfig" |
460 | ||
f62f73f6 CM |
461 | source "drivers/pci/pcie/Kconfig" |
462 | ||
47fc28bf CM |
463 | config TILE_USB |
464 | tristate "Tilera USB host adapter support" | |
465 | default y | |
466 | depends on USB | |
467 | depends on TILEGX | |
468 | select TILE_GXIO_USB_HOST | |
469 | ---help--- | |
470 | Provides USB host adapter support for the built-in EHCI and OHCI | |
471 | interfaces on TILE-Gx chips. | |
472 | ||
867e359b CM |
473 | source "drivers/pci/hotplug/Kconfig" |
474 | ||
475 | endmenu | |
476 | ||
477 | menu "Executable file formats" | |
478 | ||
867e359b CM |
479 | source "fs/Kconfig.binfmt" |
480 | ||
481 | endmenu | |
482 | ||
483 | source "net/Kconfig" | |
484 | ||
485 | source "drivers/Kconfig" | |
486 | ||
487 | source "fs/Kconfig" | |
488 | ||
489 | source "arch/tile/Kconfig.debug" | |
490 | ||
491 | source "security/Kconfig" | |
492 | ||
493 | source "crypto/Kconfig" | |
494 | ||
495 | source "lib/Kconfig" | |
a78c942d CM |
496 | |
497 | source "arch/tile/kvm/Kconfig" |