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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 | 11 | select CC_OPTIMIZE_FOR_SIZE |
b69ec42b | 12 | select HAVE_DEBUG_KMEMLEAK |
8df27406 TG |
13 | select GENERIC_IRQ_PROBE |
14 | select GENERIC_PENDING_IRQ if SMP | |
61a16741 | 15 | select GENERIC_IRQ_SHOW |
9b2a60c4 | 16 | select HAVE_DEBUG_BUGVERBOSE |
4febd95a | 17 | select VIRT_TO_BUS |
f133ecca | 18 | select SYS_HYPERVISOR |
446f24d1 | 19 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
8d695143 | 20 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4ec008d6 | 21 | select GENERIC_CLOCKEVENTS |
786d35d4 | 22 | select MODULES_USE_ELF_RELA |
969f6fe6 | 23 | select HAVE_ARCH_TRACEHOOK |
ef567f25 | 24 | select HAVE_SYSCALL_TRACEPOINTS |
adf6d9b3 | 25 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
d1a1dc0b | 26 | select HAVE_DEBUG_STACKOVERFLOW |
49cf78ef | 27 | select ARCH_WANT_FRAME_POINTERS |
867e359b | 28 | |
8df27406 TG |
29 | # FIXME: investigate whether we need/want these options. |
30 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
31 | # select HAVE_OPTPROBES |
32 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
33 | # select HAVE_HW_BREAKPOINT | |
34 | # select PERF_EVENTS | |
35 | # select HAVE_USER_RETURN_NOTIFIER | |
36 | # config NO_BOOTMEM | |
37 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
38 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 39 | |
8df27406 | 40 | config MMU |
867e359b CM |
41 | def_bool y |
42 | ||
8df27406 | 43 | config GENERIC_CSUM |
867e359b | 44 | def_bool y |
867e359b | 45 | |
867e359b CM |
46 | config HAVE_ARCH_ALLOC_REMAP |
47 | def_bool y | |
48 | ||
49 | config HAVE_SETUP_PER_CPU_AREA | |
50 | def_bool y | |
51 | ||
52 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 53 | def_bool y |
867e359b CM |
54 | |
55 | config SYS_SUPPORTS_HUGETLBFS | |
56 | def_bool y | |
57 | ||
621b1955 CM |
58 | # Support for additional huge page sizes besides HPAGE_SIZE. |
59 | # The software support is currently only present in the TILE-Gx | |
60 | # hypervisor. TILEPro in any case does not support page sizes | |
61 | # larger than the default HPAGE_SIZE. | |
62 | config HUGETLB_SUPER_PAGES | |
63 | depends on HUGETLB_PAGE && TILEGX | |
64 | def_bool y | |
65 | ||
4a556f4f CM |
66 | config GENERIC_TIME_VSYSCALL |
67 | def_bool y | |
68 | ||
25985edc | 69 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
70 | config RWSEM_GENERIC_SPINLOCK |
71 | def_bool y | |
72 | ||
867e359b CM |
73 | # We only support gcc 4.4 and above, so this should work. |
74 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
75 | def_bool y | |
76 | ||
77 | config ARCH_PHYS_ADDR_T_64BIT | |
78 | def_bool y | |
79 | ||
d31eb519 FT |
80 | config ARCH_DMA_ADDR_T_64BIT |
81 | def_bool y | |
82 | ||
3d1e8a81 CM |
83 | config NEED_DMA_MAP_STATE |
84 | def_bool y | |
85 | ||
41bb38fc CM |
86 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
87 | bool | |
88 | ||
867e359b CM |
89 | config LOCKDEP_SUPPORT |
90 | def_bool y | |
91 | ||
92 | config STACKTRACE_SUPPORT | |
93 | def_bool y | |
94 | select STACKTRACE | |
95 | ||
96 | # We use discontigmem for now; at some point we may want to switch | |
97 | # to sparsemem (Tilera bug 7996). | |
98 | config ARCH_DISCONTIGMEM_ENABLE | |
99 | def_bool y | |
100 | ||
101 | config ARCH_DISCONTIGMEM_DEFAULT | |
102 | def_bool y | |
103 | ||
104 | config TRACE_IRQFLAGS_SUPPORT | |
105 | def_bool y | |
106 | ||
107 | config STRICT_DEVMEM | |
108 | def_bool y | |
109 | ||
110 | # SMP is required for Tilera Linux. | |
111 | config SMP | |
112 | def_bool y | |
113 | ||
867e359b | 114 | config HVC_TILE |
4f73bc4d | 115 | depends on TTY |
867e359b | 116 | select HVC_DRIVER |
bda0f5ba | 117 | select HVC_IRQ if TILEGX |
867e359b CM |
118 | def_bool y |
119 | ||
867e359b | 120 | config TILEGX |
a61fd5e3 TL |
121 | bool "Building for TILE-Gx (64-bit) processor" |
122 | select HAVE_FUNCTION_TRACER | |
123 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST | |
124 | select HAVE_FUNCTION_GRAPH_TRACER | |
125 | select HAVE_DYNAMIC_FTRACE | |
126 | select HAVE_FTRACE_MCOUNT_RECORD | |
3fa17c39 TL |
127 | select HAVE_KPROBES |
128 | select HAVE_KRETPROBES | |
8157107b | 129 | select HAVE_ARCH_KGDB |
867e359b | 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 | ||
99a844b7 CM |
144 | source "kernel/Kconfig.freezer" |
145 | ||
867e359b CM |
146 | menu "Tilera-specific configuration" |
147 | ||
148 | config NR_CPUS | |
149 | int "Maximum number of tiles (2-255)" | |
150 | range 2 255 | |
151 | depends on SMP | |
152 | default "64" | |
153 | ---help--- | |
154 | Building with 64 is the recommended value, but a slightly | |
155 | smaller kernel memory footprint results from using a smaller | |
156 | value on chips with fewer tiles. | |
157 | ||
d5d14ed6 CM |
158 | if TILEGX |
159 | ||
160 | choice | |
161 | prompt "Kernel page size" | |
162 | default PAGE_SIZE_64KB | |
163 | help | |
164 | This lets you select the page size of the kernel. For best | |
165 | performance on memory-intensive applications, a page size of 64KB | |
166 | is recommended. For workloads involving many small files, many | |
167 | connections, etc., it may be better to select 16KB, which uses | |
168 | memory more efficiently at some cost in TLB performance. | |
169 | ||
170 | Note that this option is TILE-Gx specific; currently | |
171 | TILEPro page size is set by rebuilding the hypervisor. | |
172 | ||
173 | config PAGE_SIZE_16KB | |
174 | bool "16KB" | |
175 | ||
176 | config PAGE_SIZE_64KB | |
177 | bool "64KB" | |
178 | ||
179 | endchoice | |
180 | ||
181 | endif | |
182 | ||
867e359b CM |
183 | source "kernel/Kconfig.hz" |
184 | ||
185 | config KEXEC | |
186 | bool "kexec system call" | |
187 | ---help--- | |
188 | kexec is a system call that implements the ability to shutdown your | |
189 | current kernel, and to start another kernel. It is like a reboot | |
190 | but it is independent of the system firmware. It is used | |
191 | to implement the "mboot" Tilera booter. | |
192 | ||
193 | The name comes from the similarity to the exec system call. | |
194 | ||
195 | config COMPAT | |
196 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
197 | depends on TILEGX | |
198 | select COMPAT_BINFMT_ELF | |
199 | default y | |
200 | ---help--- | |
201 | If enabled, the kernel will support running TILE-Gx binaries | |
202 | that were built with the -m32 option. | |
203 | ||
204 | config SYSVIPC_COMPAT | |
205 | def_bool y | |
206 | depends on COMPAT && SYSVIPC | |
207 | ||
d7c96611 | 208 | # We do not currently support disabling HIGHMEM on tilepro. |
867e359b CM |
209 | config HIGHMEM |
210 | bool # "Support for more than 512 MB of RAM" | |
211 | default !TILEGX | |
212 | ---help--- | |
213 | Linux can use the full amount of RAM in the system by | |
214 | default. However, the address space of TILE processors is | |
215 | only 4 Gigabytes large. That means that, if you have a large | |
216 | amount of physical memory, not all of it can be "permanently | |
217 | mapped" by the kernel. The physical memory that's not | |
218 | permanently mapped is called "high memory". | |
219 | ||
220 | If you are compiling a kernel which will never run on a | |
221 | machine with more than 512 MB total physical RAM, answer | |
222 | "false" here. This will result in the kernel mapping all of | |
223 | physical memory into the top 1 GB of virtual memory space. | |
224 | ||
225 | If unsure, say "true". | |
226 | ||
eef015c8 CM |
227 | config ZONE_DMA |
228 | def_bool y | |
229 | ||
41bb38fc CM |
230 | config IOMMU_HELPER |
231 | bool | |
232 | ||
233 | config NEED_SG_DMA_LENGTH | |
234 | bool | |
235 | ||
236 | config SWIOTLB | |
237 | bool | |
238 | default TILEGX | |
239 | select IOMMU_HELPER | |
240 | select NEED_SG_DMA_LENGTH | |
241 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
242 | ||
867e359b CM |
243 | # We do not currently support disabling NUMA. |
244 | config NUMA | |
245 | bool # "NUMA Memory Allocation and Scheduler Support" | |
246 | depends on SMP && DISCONTIGMEM | |
247 | default y | |
248 | ---help--- | |
249 | NUMA memory allocation is required for TILE processors | |
250 | unless booting with memory striping enabled in the | |
251 | hypervisor, or with only a single memory controller. | |
252 | It is recommended that this option always be enabled. | |
253 | ||
254 | config NODES_SHIFT | |
255 | int "Log base 2 of the max number of memory controllers" | |
256 | default 2 | |
257 | depends on NEED_MULTIPLE_NODES | |
258 | ---help--- | |
259 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
260 | In a system with more controllers, this value should be raised. | |
261 | ||
867e359b CM |
262 | choice |
263 | depends on !TILEGX | |
6a108a14 | 264 | prompt "Memory split" if EXPERT |
867e359b CM |
265 | default VMSPLIT_3G |
266 | ---help--- | |
267 | Select the desired split between kernel and user memory. | |
268 | ||
269 | If the address range available to the kernel is less than the | |
270 | physical memory installed, the remaining memory will be available | |
271 | as "high memory". Accessing high memory is a little more costly | |
272 | than low memory, as it needs to be mapped into the kernel first. | |
273 | Note that increasing the kernel address space limits the range | |
274 | available to user programs, making the address space there | |
275 | tighter. Selecting anything other than the default 3G/1G split | |
276 | will also likely make your kernel incompatible with binary-only | |
277 | kernel modules. | |
278 | ||
279 | If you are not absolutely sure what you are doing, leave this | |
280 | option alone! | |
281 | ||
5592840b | 282 | config VMSPLIT_3_75G |
867e359b | 283 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 284 | config VMSPLIT_3_5G |
867e359b CM |
285 | bool "3.5G/0.5G user/kernel split" |
286 | config VMSPLIT_3G | |
287 | bool "3G/1G user/kernel split" | |
09c17eab CM |
288 | config VMSPLIT_2_75G |
289 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
290 | config VMSPLIT_2_5G | |
291 | bool "2.5G/1.5G user/kernel split" | |
292 | config VMSPLIT_2_25G | |
293 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
294 | config VMSPLIT_2G |
295 | bool "2G/2G user/kernel split" | |
296 | config VMSPLIT_1G | |
297 | bool "1G/3G user/kernel split" | |
298 | endchoice | |
299 | ||
300 | config PAGE_OFFSET | |
301 | hex | |
884197f7 | 302 | depends on !64BIT |
5592840b CM |
303 | default 0xF0000000 if VMSPLIT_3_75G |
304 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
305 | default 0xB0000000 if VMSPLIT_2_75G |
306 | default 0xA0000000 if VMSPLIT_2_5G | |
307 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
308 | default 0x80000000 if VMSPLIT_2G |
309 | default 0x40000000 if VMSPLIT_1G | |
310 | default 0xC0000000 | |
311 | ||
312 | source "mm/Kconfig" | |
313 | ||
bc1a298f CM |
314 | source "kernel/Kconfig.preempt" |
315 | ||
867e359b CM |
316 | config CMDLINE_BOOL |
317 | bool "Built-in kernel command line" | |
318 | default n | |
319 | ---help--- | |
320 | Allow for specifying boot arguments to the kernel at | |
321 | build time. On some systems (e.g. embedded ones), it is | |
322 | necessary or convenient to provide some or all of the | |
323 | kernel boot arguments with the kernel itself (that is, | |
324 | to not rely on the boot loader to provide them.) | |
325 | ||
326 | To compile command line arguments into the kernel, | |
327 | set this option to 'Y', then fill in the | |
328 | the boot arguments in CONFIG_CMDLINE. | |
329 | ||
330 | Systems with fully functional boot loaders (e.g. mboot, or | |
331 | if booting over PCI) should leave this option set to 'N'. | |
332 | ||
333 | config CMDLINE | |
334 | string "Built-in kernel command string" | |
335 | depends on CMDLINE_BOOL | |
336 | default "" | |
337 | ---help--- | |
338 | Enter arguments here that should be compiled into the kernel | |
339 | image and used at boot time. If the boot loader provides a | |
340 | command line at boot time, it is appended to this string to | |
341 | form the full kernel command line, when the system boots. | |
342 | ||
343 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
344 | change this behavior. | |
345 | ||
346 | In most cases, the command line (whether built-in or provided | |
347 | by the boot loader) should specify the device for the root | |
348 | file system. | |
349 | ||
350 | config CMDLINE_OVERRIDE | |
351 | bool "Built-in command line overrides boot loader arguments" | |
352 | default n | |
353 | depends on CMDLINE_BOOL | |
354 | ---help--- | |
355 | Set this option to 'Y' to have the kernel ignore the boot loader | |
356 | command line, and use ONLY the built-in command line. | |
357 | ||
358 | This is used to work around broken boot loaders. This should | |
359 | be set to 'N' under normal conditions. | |
360 | ||
361 | config VMALLOC_RESERVE | |
362 | hex | |
ad2a4bb3 | 363 | default 0x2000000 |
867e359b | 364 | |
9f9c0382 CM |
365 | config HARDWALL |
366 | bool "Hardwall support to allow access to user dynamic network" | |
367 | default y | |
368 | ||
a78c942d CM |
369 | config KERNEL_PL |
370 | int "Processor protection level for kernel" | |
371 | range 1 2 | |
c539914d CM |
372 | default 2 if TILEGX |
373 | default 1 if !TILEGX | |
a78c942d | 374 | ---help--- |
c539914d CM |
375 | Since MDE 4.2, the Tilera hypervisor runs the kernel |
376 | at PL2 by default. If running under an older hypervisor, | |
377 | or as a KVM guest, you must run at PL1. (The current | |
378 | hypervisor may also be recompiled with "make HV_PL=2" to | |
379 | allow it to run a kernel at PL1, but clients running at PL1 | |
380 | are not expected to be supported indefinitely.) | |
381 | ||
382 | If you're not sure, don't change the default. | |
a78c942d | 383 | |
37b82b5d CM |
384 | source "arch/tile/gxio/Kconfig" |
385 | ||
867e359b CM |
386 | endmenu # Tilera-specific configuration |
387 | ||
388 | menu "Bus options" | |
389 | ||
f02cbbe6 CM |
390 | config PCI |
391 | bool "PCI support" | |
392 | default y | |
393 | select PCI_DOMAINS | |
84550121 | 394 | select GENERIC_PCI_IOMAP |
12962267 | 395 | select TILE_GXIO_TRIO if TILEGX |
12962267 | 396 | select PCI_MSI if TILEGX |
f02cbbe6 CM |
397 | ---help--- |
398 | Enable PCI root complex support, so PCIe endpoint devices can | |
399 | be attached to the Tile chip. Many, but not all, PCI devices | |
400 | are supported under Tilera's root complex driver. | |
401 | ||
402 | config PCI_DOMAINS | |
403 | bool | |
404 | ||
867e359b CM |
405 | config NO_IOMEM |
406 | def_bool !PCI | |
407 | ||
408 | config NO_IOPORT | |
409 | def_bool !PCI | |
410 | ||
cf89c426 CM |
411 | config TILE_PCI_IO |
412 | bool "PCI I/O space support" | |
413 | default n | |
414 | depends on PCI | |
415 | depends on TILEGX | |
416 | ---help--- | |
417 | Enable PCI I/O space support on TILEGx. Since the PCI I/O space | |
418 | is used by few modern PCIe endpoint devices, its support is disabled | |
419 | by default to save the TRIO PIO Region resource for other purposes. | |
420 | ||
867e359b CM |
421 | source "drivers/pci/Kconfig" |
422 | ||
f62f73f6 CM |
423 | source "drivers/pci/pcie/Kconfig" |
424 | ||
47fc28bf CM |
425 | config TILE_USB |
426 | tristate "Tilera USB host adapter support" | |
427 | default y | |
428 | depends on USB | |
429 | depends on TILEGX | |
430 | select TILE_GXIO_USB_HOST | |
431 | ---help--- | |
432 | Provides USB host adapter support for the built-in EHCI and OHCI | |
433 | interfaces on TILE-Gx chips. | |
434 | ||
867e359b CM |
435 | source "drivers/pci/hotplug/Kconfig" |
436 | ||
437 | endmenu | |
438 | ||
439 | menu "Executable file formats" | |
440 | ||
867e359b CM |
441 | source "fs/Kconfig.binfmt" |
442 | ||
443 | endmenu | |
444 | ||
445 | source "net/Kconfig" | |
446 | ||
447 | source "drivers/Kconfig" | |
448 | ||
449 | source "fs/Kconfig" | |
450 | ||
451 | source "arch/tile/Kconfig.debug" | |
452 | ||
453 | source "security/Kconfig" | |
454 | ||
455 | source "crypto/Kconfig" | |
456 | ||
457 | source "lib/Kconfig" | |
a78c942d CM |
458 | |
459 | source "arch/tile/kvm/Kconfig" |