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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 |
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 |
adf6d9b3 | 27 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
d1a1dc0b | 28 | select HAVE_DEBUG_STACKOVERFLOW |
49cf78ef | 29 | select ARCH_WANT_FRAME_POINTERS |
867e359b | 30 | |
8df27406 TG |
31 | # FIXME: investigate whether we need/want these options. |
32 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
33 | # select HAVE_OPTPROBES |
34 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
35 | # select HAVE_HW_BREAKPOINT | |
36 | # select PERF_EVENTS | |
37 | # select HAVE_USER_RETURN_NOTIFIER | |
38 | # config NO_BOOTMEM | |
39 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
40 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 41 | |
8df27406 | 42 | config MMU |
867e359b CM |
43 | def_bool y |
44 | ||
8df27406 | 45 | config GENERIC_CSUM |
867e359b | 46 | def_bool y |
867e359b | 47 | |
867e359b CM |
48 | config HAVE_ARCH_ALLOC_REMAP |
49 | def_bool y | |
50 | ||
51 | config HAVE_SETUP_PER_CPU_AREA | |
52 | def_bool y | |
53 | ||
54 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 55 | def_bool y |
867e359b CM |
56 | |
57 | config SYS_SUPPORTS_HUGETLBFS | |
58 | def_bool y | |
59 | ||
621b1955 CM |
60 | # Support for additional huge page sizes besides HPAGE_SIZE. |
61 | # The software support is currently only present in the TILE-Gx | |
62 | # hypervisor. TILEPro in any case does not support page sizes | |
63 | # larger than the default HPAGE_SIZE. | |
64 | config HUGETLB_SUPER_PAGES | |
65 | depends on HUGETLB_PAGE && TILEGX | |
66 | def_bool y | |
67 | ||
4a556f4f CM |
68 | config GENERIC_TIME_VSYSCALL |
69 | def_bool y | |
70 | ||
25985edc | 71 | # FIXME: tilegx can implement a more efficient rwsem. |
867e359b CM |
72 | config RWSEM_GENERIC_SPINLOCK |
73 | def_bool y | |
74 | ||
867e359b CM |
75 | # We only support gcc 4.4 and above, so this should work. |
76 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
77 | def_bool y | |
78 | ||
79 | config ARCH_PHYS_ADDR_T_64BIT | |
80 | def_bool y | |
81 | ||
d31eb519 FT |
82 | config ARCH_DMA_ADDR_T_64BIT |
83 | def_bool y | |
84 | ||
3d1e8a81 CM |
85 | config NEED_DMA_MAP_STATE |
86 | def_bool y | |
87 | ||
41bb38fc CM |
88 | config ARCH_HAS_DMA_SET_COHERENT_MASK |
89 | bool | |
90 | ||
867e359b CM |
91 | config LOCKDEP_SUPPORT |
92 | def_bool y | |
93 | ||
94 | config STACKTRACE_SUPPORT | |
95 | def_bool y | |
96 | select STACKTRACE | |
97 | ||
98 | # We use discontigmem for now; at some point we may want to switch | |
99 | # to sparsemem (Tilera bug 7996). | |
100 | config ARCH_DISCONTIGMEM_ENABLE | |
101 | def_bool y | |
102 | ||
103 | config ARCH_DISCONTIGMEM_DEFAULT | |
104 | def_bool y | |
105 | ||
106 | config TRACE_IRQFLAGS_SUPPORT | |
107 | def_bool y | |
108 | ||
109 | config STRICT_DEVMEM | |
110 | def_bool y | |
111 | ||
112 | # SMP is required for Tilera Linux. | |
113 | config SMP | |
114 | def_bool y | |
115 | ||
867e359b | 116 | config HVC_TILE |
4f73bc4d | 117 | depends on TTY |
867e359b | 118 | select HVC_DRIVER |
bda0f5ba | 119 | select HVC_IRQ if TILEGX |
867e359b CM |
120 | def_bool y |
121 | ||
867e359b | 122 | config TILEGX |
a61fd5e3 TL |
123 | bool "Building for TILE-Gx (64-bit) processor" |
124 | select HAVE_FUNCTION_TRACER | |
125 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST | |
126 | select HAVE_FUNCTION_GRAPH_TRACER | |
127 | select HAVE_DYNAMIC_FTRACE | |
128 | select HAVE_FTRACE_MCOUNT_RECORD | |
3fa17c39 TL |
129 | select HAVE_KPROBES |
130 | select HAVE_KRETPROBES | |
8157107b | 131 | select HAVE_ARCH_KGDB |
867e359b | 132 | |
acd1a19e CM |
133 | config TILEPRO |
134 | def_bool !TILEGX | |
135 | ||
867e359b | 136 | config 64BIT |
acd1a19e | 137 | def_bool TILEGX |
867e359b CM |
138 | |
139 | config ARCH_DEFCONFIG | |
140 | string | |
3d1e8a81 | 141 | default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
867e359b CM |
142 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
143 | ||
144 | source "init/Kconfig" | |
145 | ||
99a844b7 CM |
146 | source "kernel/Kconfig.freezer" |
147 | ||
867e359b CM |
148 | menu "Tilera-specific configuration" |
149 | ||
150 | config NR_CPUS | |
151 | int "Maximum number of tiles (2-255)" | |
152 | range 2 255 | |
153 | depends on SMP | |
154 | default "64" | |
155 | ---help--- | |
156 | Building with 64 is the recommended value, but a slightly | |
157 | smaller kernel memory footprint results from using a smaller | |
158 | value on chips with fewer tiles. | |
159 | ||
d5d14ed6 CM |
160 | if TILEGX |
161 | ||
162 | choice | |
163 | prompt "Kernel page size" | |
164 | default PAGE_SIZE_64KB | |
165 | help | |
166 | This lets you select the page size of the kernel. For best | |
167 | performance on memory-intensive applications, a page size of 64KB | |
168 | is recommended. For workloads involving many small files, many | |
169 | connections, etc., it may be better to select 16KB, which uses | |
170 | memory more efficiently at some cost in TLB performance. | |
171 | ||
172 | Note that this option is TILE-Gx specific; currently | |
173 | TILEPro page size is set by rebuilding the hypervisor. | |
174 | ||
175 | config PAGE_SIZE_16KB | |
176 | bool "16KB" | |
177 | ||
178 | config PAGE_SIZE_64KB | |
179 | bool "64KB" | |
180 | ||
181 | endchoice | |
182 | ||
183 | endif | |
184 | ||
867e359b CM |
185 | source "kernel/Kconfig.hz" |
186 | ||
187 | config KEXEC | |
188 | bool "kexec system call" | |
189 | ---help--- | |
190 | kexec is a system call that implements the ability to shutdown your | |
191 | current kernel, and to start another kernel. It is like a reboot | |
192 | but it is independent of the system firmware. It is used | |
193 | to implement the "mboot" Tilera booter. | |
194 | ||
195 | The name comes from the similarity to the exec system call. | |
196 | ||
197 | config COMPAT | |
198 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
199 | depends on TILEGX | |
200 | select COMPAT_BINFMT_ELF | |
201 | default y | |
202 | ---help--- | |
203 | If enabled, the kernel will support running TILE-Gx binaries | |
204 | that were built with the -m32 option. | |
205 | ||
206 | config SYSVIPC_COMPAT | |
207 | def_bool y | |
208 | depends on COMPAT && SYSVIPC | |
209 | ||
d7c96611 | 210 | # We do not currently support disabling HIGHMEM on tilepro. |
867e359b CM |
211 | config HIGHMEM |
212 | bool # "Support for more than 512 MB of RAM" | |
213 | default !TILEGX | |
214 | ---help--- | |
215 | Linux can use the full amount of RAM in the system by | |
216 | default. However, the address space of TILE processors is | |
217 | only 4 Gigabytes large. That means that, if you have a large | |
218 | amount of physical memory, not all of it can be "permanently | |
219 | mapped" by the kernel. The physical memory that's not | |
220 | permanently mapped is called "high memory". | |
221 | ||
222 | If you are compiling a kernel which will never run on a | |
223 | machine with more than 512 MB total physical RAM, answer | |
224 | "false" here. This will result in the kernel mapping all of | |
225 | physical memory into the top 1 GB of virtual memory space. | |
226 | ||
227 | If unsure, say "true". | |
228 | ||
eef015c8 CM |
229 | config ZONE_DMA |
230 | def_bool y | |
231 | ||
41bb38fc CM |
232 | config IOMMU_HELPER |
233 | bool | |
234 | ||
235 | config NEED_SG_DMA_LENGTH | |
236 | bool | |
237 | ||
238 | config SWIOTLB | |
239 | bool | |
240 | default TILEGX | |
241 | select IOMMU_HELPER | |
242 | select NEED_SG_DMA_LENGTH | |
243 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
244 | ||
867e359b CM |
245 | # We do not currently support disabling NUMA. |
246 | config NUMA | |
247 | bool # "NUMA Memory Allocation and Scheduler Support" | |
248 | depends on SMP && DISCONTIGMEM | |
249 | default y | |
250 | ---help--- | |
251 | NUMA memory allocation is required for TILE processors | |
252 | unless booting with memory striping enabled in the | |
253 | hypervisor, or with only a single memory controller. | |
254 | It is recommended that this option always be enabled. | |
255 | ||
256 | config NODES_SHIFT | |
257 | int "Log base 2 of the max number of memory controllers" | |
258 | default 2 | |
259 | depends on NEED_MULTIPLE_NODES | |
260 | ---help--- | |
261 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
262 | In a system with more controllers, this value should be raised. | |
263 | ||
867e359b CM |
264 | choice |
265 | depends on !TILEGX | |
6a108a14 | 266 | prompt "Memory split" if EXPERT |
867e359b CM |
267 | default VMSPLIT_3G |
268 | ---help--- | |
269 | Select the desired split between kernel and user memory. | |
270 | ||
271 | If the address range available to the kernel is less than the | |
272 | physical memory installed, the remaining memory will be available | |
273 | as "high memory". Accessing high memory is a little more costly | |
274 | than low memory, as it needs to be mapped into the kernel first. | |
275 | Note that increasing the kernel address space limits the range | |
276 | available to user programs, making the address space there | |
277 | tighter. Selecting anything other than the default 3G/1G split | |
278 | will also likely make your kernel incompatible with binary-only | |
279 | kernel modules. | |
280 | ||
281 | If you are not absolutely sure what you are doing, leave this | |
282 | option alone! | |
283 | ||
5592840b | 284 | config VMSPLIT_3_75G |
867e359b | 285 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 286 | config VMSPLIT_3_5G |
867e359b CM |
287 | bool "3.5G/0.5G user/kernel split" |
288 | config VMSPLIT_3G | |
289 | bool "3G/1G user/kernel split" | |
09c17eab CM |
290 | config VMSPLIT_2_75G |
291 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
292 | config VMSPLIT_2_5G | |
293 | bool "2.5G/1.5G user/kernel split" | |
294 | config VMSPLIT_2_25G | |
295 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
296 | config VMSPLIT_2G |
297 | bool "2G/2G user/kernel split" | |
298 | config VMSPLIT_1G | |
299 | bool "1G/3G user/kernel split" | |
300 | endchoice | |
301 | ||
302 | config PAGE_OFFSET | |
303 | hex | |
884197f7 | 304 | depends on !64BIT |
5592840b CM |
305 | default 0xF0000000 if VMSPLIT_3_75G |
306 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
307 | default 0xB0000000 if VMSPLIT_2_75G |
308 | default 0xA0000000 if VMSPLIT_2_5G | |
309 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
310 | default 0x80000000 if VMSPLIT_2G |
311 | default 0x40000000 if VMSPLIT_1G | |
312 | default 0xC0000000 | |
313 | ||
314 | source "mm/Kconfig" | |
315 | ||
bc1a298f CM |
316 | source "kernel/Kconfig.preempt" |
317 | ||
867e359b CM |
318 | config CMDLINE_BOOL |
319 | bool "Built-in kernel command line" | |
320 | default n | |
321 | ---help--- | |
322 | Allow for specifying boot arguments to the kernel at | |
323 | build time. On some systems (e.g. embedded ones), it is | |
324 | necessary or convenient to provide some or all of the | |
325 | kernel boot arguments with the kernel itself (that is, | |
326 | to not rely on the boot loader to provide them.) | |
327 | ||
328 | To compile command line arguments into the kernel, | |
329 | set this option to 'Y', then fill in the | |
330 | the boot arguments in CONFIG_CMDLINE. | |
331 | ||
332 | Systems with fully functional boot loaders (e.g. mboot, or | |
333 | if booting over PCI) should leave this option set to 'N'. | |
334 | ||
335 | config CMDLINE | |
336 | string "Built-in kernel command string" | |
337 | depends on CMDLINE_BOOL | |
338 | default "" | |
339 | ---help--- | |
340 | Enter arguments here that should be compiled into the kernel | |
341 | image and used at boot time. If the boot loader provides a | |
342 | command line at boot time, it is appended to this string to | |
343 | form the full kernel command line, when the system boots. | |
344 | ||
345 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
346 | change this behavior. | |
347 | ||
348 | In most cases, the command line (whether built-in or provided | |
349 | by the boot loader) should specify the device for the root | |
350 | file system. | |
351 | ||
352 | config CMDLINE_OVERRIDE | |
353 | bool "Built-in command line overrides boot loader arguments" | |
354 | default n | |
355 | depends on CMDLINE_BOOL | |
356 | ---help--- | |
357 | Set this option to 'Y' to have the kernel ignore the boot loader | |
358 | command line, and use ONLY the built-in command line. | |
359 | ||
360 | This is used to work around broken boot loaders. This should | |
361 | be set to 'N' under normal conditions. | |
362 | ||
363 | config VMALLOC_RESERVE | |
364 | hex | |
365 | default 0x1000000 | |
366 | ||
9f9c0382 CM |
367 | config HARDWALL |
368 | bool "Hardwall support to allow access to user dynamic network" | |
369 | default y | |
370 | ||
a78c942d CM |
371 | config KERNEL_PL |
372 | int "Processor protection level for kernel" | |
373 | range 1 2 | |
c539914d CM |
374 | default 2 if TILEGX |
375 | default 1 if !TILEGX | |
a78c942d | 376 | ---help--- |
c539914d CM |
377 | Since MDE 4.2, the Tilera hypervisor runs the kernel |
378 | at PL2 by default. If running under an older hypervisor, | |
379 | or as a KVM guest, you must run at PL1. (The current | |
380 | hypervisor may also be recompiled with "make HV_PL=2" to | |
381 | allow it to run a kernel at PL1, but clients running at PL1 | |
382 | are not expected to be supported indefinitely.) | |
383 | ||
384 | If you're not sure, don't change the default. | |
a78c942d | 385 | |
37b82b5d CM |
386 | source "arch/tile/gxio/Kconfig" |
387 | ||
867e359b CM |
388 | endmenu # Tilera-specific configuration |
389 | ||
390 | menu "Bus options" | |
391 | ||
f02cbbe6 CM |
392 | config PCI |
393 | bool "PCI support" | |
394 | default y | |
395 | select PCI_DOMAINS | |
84550121 | 396 | select GENERIC_PCI_IOMAP |
12962267 | 397 | select TILE_GXIO_TRIO if TILEGX |
12962267 | 398 | select PCI_MSI if TILEGX |
f02cbbe6 CM |
399 | ---help--- |
400 | Enable PCI root complex support, so PCIe endpoint devices can | |
401 | be attached to the Tile chip. Many, but not all, PCI devices | |
402 | are supported under Tilera's root complex driver. | |
403 | ||
404 | config PCI_DOMAINS | |
405 | bool | |
406 | ||
867e359b CM |
407 | config NO_IOMEM |
408 | def_bool !PCI | |
409 | ||
410 | config NO_IOPORT | |
411 | def_bool !PCI | |
412 | ||
cf89c426 CM |
413 | config TILE_PCI_IO |
414 | bool "PCI I/O space support" | |
415 | default n | |
416 | depends on PCI | |
417 | depends on TILEGX | |
418 | ---help--- | |
419 | Enable PCI I/O space support on TILEGx. Since the PCI I/O space | |
420 | is used by few modern PCIe endpoint devices, its support is disabled | |
421 | by default to save the TRIO PIO Region resource for other purposes. | |
422 | ||
867e359b CM |
423 | source "drivers/pci/Kconfig" |
424 | ||
f62f73f6 CM |
425 | source "drivers/pci/pcie/Kconfig" |
426 | ||
47fc28bf CM |
427 | config TILE_USB |
428 | tristate "Tilera USB host adapter support" | |
429 | default y | |
430 | depends on USB | |
431 | depends on TILEGX | |
432 | select TILE_GXIO_USB_HOST | |
433 | ---help--- | |
434 | Provides USB host adapter support for the built-in EHCI and OHCI | |
435 | interfaces on TILE-Gx chips. | |
436 | ||
867e359b CM |
437 | source "drivers/pci/hotplug/Kconfig" |
438 | ||
439 | endmenu | |
440 | ||
441 | menu "Executable file formats" | |
442 | ||
867e359b CM |
443 | source "fs/Kconfig.binfmt" |
444 | ||
445 | endmenu | |
446 | ||
447 | source "net/Kconfig" | |
448 | ||
449 | source "drivers/Kconfig" | |
450 | ||
451 | source "fs/Kconfig" | |
452 | ||
453 | source "arch/tile/Kconfig.debug" | |
454 | ||
455 | source "security/Kconfig" | |
456 | ||
457 | source "crypto/Kconfig" | |
458 | ||
459 | source "lib/Kconfig" | |
a78c942d CM |
460 | |
461 | source "arch/tile/kvm/Kconfig" |