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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 GENERIC_IRQ_PROBE |
15 | select GENERIC_PENDING_IRQ if SMP | |
61a16741 | 16 | select GENERIC_IRQ_SHOW |
9b2a60c4 | 17 | select HAVE_DEBUG_BUGVERBOSE |
4febd95a | 18 | select VIRT_TO_BUS |
f133ecca | 19 | select SYS_HYPERVISOR |
446f24d1 | 20 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
8d695143 | 21 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4ec008d6 | 22 | select GENERIC_CLOCKEVENTS |
786d35d4 | 23 | select MODULES_USE_ELF_RELA |
969f6fe6 | 24 | select HAVE_ARCH_TRACEHOOK |
ef567f25 | 25 | select HAVE_SYSCALL_TRACEPOINTS |
adf6d9b3 | 26 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
d1a1dc0b | 27 | select HAVE_DEBUG_STACKOVERFLOW |
49cf78ef | 28 | select ARCH_WANT_FRAME_POINTERS |
867e359b | 29 | |
8df27406 TG |
30 | # FIXME: investigate whether we need/want these options. |
31 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
32 | # select HAVE_OPTPROBES |
33 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
34 | # select HAVE_HW_BREAKPOINT | |
35 | # select PERF_EVENTS | |
36 | # select HAVE_USER_RETURN_NOTIFIER | |
37 | # config NO_BOOTMEM | |
38 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
39 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 40 | |
8df27406 | 41 | config MMU |
867e359b CM |
42 | def_bool y |
43 | ||
8df27406 | 44 | config GENERIC_CSUM |
867e359b | 45 | def_bool y |
867e359b | 46 | |
867e359b CM |
47 | config HAVE_ARCH_ALLOC_REMAP |
48 | def_bool y | |
49 | ||
50 | config HAVE_SETUP_PER_CPU_AREA | |
51 | def_bool y | |
52 | ||
53 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 54 | def_bool y |
867e359b CM |
55 | |
56 | config SYS_SUPPORTS_HUGETLBFS | |
57 | def_bool y | |
58 | ||
621b1955 CM |
59 | # Support for additional huge page sizes besides HPAGE_SIZE. |
60 | # The software support is currently only present in the TILE-Gx | |
61 | # hypervisor. TILEPro in any case does not support page sizes | |
62 | # larger than the default HPAGE_SIZE. | |
63 | config HUGETLB_SUPER_PAGES | |
64 | depends on HUGETLB_PAGE && TILEGX | |
65 | def_bool y | |
66 | ||
4a556f4f CM |
67 | config GENERIC_TIME_VSYSCALL |
68 | def_bool y | |
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 | ||
108 | config STRICT_DEVMEM | |
109 | def_bool y | |
110 | ||
111 | # SMP is required for Tilera Linux. | |
112 | config SMP | |
113 | def_bool y | |
114 | ||
867e359b | 115 | config HVC_TILE |
4f73bc4d | 116 | depends on TTY |
867e359b | 117 | select HVC_DRIVER |
bda0f5ba | 118 | select HVC_IRQ if TILEGX |
867e359b CM |
119 | def_bool y |
120 | ||
867e359b | 121 | config TILEGX |
a61fd5e3 TL |
122 | bool "Building for TILE-Gx (64-bit) processor" |
123 | select HAVE_FUNCTION_TRACER | |
124 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST | |
125 | select HAVE_FUNCTION_GRAPH_TRACER | |
126 | select HAVE_DYNAMIC_FTRACE | |
127 | select HAVE_FTRACE_MCOUNT_RECORD | |
3fa17c39 TL |
128 | select HAVE_KPROBES |
129 | select HAVE_KRETPROBES | |
8157107b | 130 | select HAVE_ARCH_KGDB |
867e359b | 131 | |
acd1a19e CM |
132 | config TILEPRO |
133 | def_bool !TILEGX | |
134 | ||
867e359b | 135 | config 64BIT |
acd1a19e | 136 | def_bool TILEGX |
867e359b CM |
137 | |
138 | config ARCH_DEFCONFIG | |
139 | string | |
3d1e8a81 | 140 | default "arch/tile/configs/tilepro_defconfig" if !TILEGX |
867e359b CM |
141 | default "arch/tile/configs/tilegx_defconfig" if TILEGX |
142 | ||
143 | source "init/Kconfig" | |
144 | ||
99a844b7 CM |
145 | source "kernel/Kconfig.freezer" |
146 | ||
867e359b CM |
147 | menu "Tilera-specific configuration" |
148 | ||
149 | config NR_CPUS | |
150 | int "Maximum number of tiles (2-255)" | |
151 | range 2 255 | |
152 | depends on SMP | |
153 | default "64" | |
154 | ---help--- | |
155 | Building with 64 is the recommended value, but a slightly | |
156 | smaller kernel memory footprint results from using a smaller | |
157 | value on chips with fewer tiles. | |
158 | ||
d5d14ed6 CM |
159 | if TILEGX |
160 | ||
161 | choice | |
162 | prompt "Kernel page size" | |
163 | default PAGE_SIZE_64KB | |
164 | help | |
165 | This lets you select the page size of the kernel. For best | |
166 | performance on memory-intensive applications, a page size of 64KB | |
167 | is recommended. For workloads involving many small files, many | |
168 | connections, etc., it may be better to select 16KB, which uses | |
169 | memory more efficiently at some cost in TLB performance. | |
170 | ||
171 | Note that this option is TILE-Gx specific; currently | |
172 | TILEPro page size is set by rebuilding the hypervisor. | |
173 | ||
174 | config PAGE_SIZE_16KB | |
175 | bool "16KB" | |
176 | ||
177 | config PAGE_SIZE_64KB | |
178 | bool "64KB" | |
179 | ||
180 | endchoice | |
181 | ||
182 | endif | |
183 | ||
867e359b CM |
184 | source "kernel/Kconfig.hz" |
185 | ||
186 | config KEXEC | |
187 | bool "kexec system call" | |
188 | ---help--- | |
189 | kexec is a system call that implements the ability to shutdown your | |
190 | current kernel, and to start another kernel. It is like a reboot | |
191 | but it is independent of the system firmware. It is used | |
192 | to implement the "mboot" Tilera booter. | |
193 | ||
194 | The name comes from the similarity to the exec system call. | |
195 | ||
196 | config COMPAT | |
197 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
198 | depends on TILEGX | |
199 | select COMPAT_BINFMT_ELF | |
200 | default y | |
201 | ---help--- | |
202 | If enabled, the kernel will support running TILE-Gx binaries | |
203 | that were built with the -m32 option. | |
204 | ||
205 | config SYSVIPC_COMPAT | |
206 | def_bool y | |
207 | depends on COMPAT && SYSVIPC | |
208 | ||
d7c96611 | 209 | # We do not currently support disabling HIGHMEM on tilepro. |
867e359b CM |
210 | config HIGHMEM |
211 | bool # "Support for more than 512 MB of RAM" | |
212 | default !TILEGX | |
213 | ---help--- | |
214 | Linux can use the full amount of RAM in the system by | |
215 | default. However, the address space of TILE processors is | |
216 | only 4 Gigabytes large. That means that, if you have a large | |
217 | amount of physical memory, not all of it can be "permanently | |
218 | mapped" by the kernel. The physical memory that's not | |
219 | permanently mapped is called "high memory". | |
220 | ||
221 | If you are compiling a kernel which will never run on a | |
222 | machine with more than 512 MB total physical RAM, answer | |
223 | "false" here. This will result in the kernel mapping all of | |
224 | physical memory into the top 1 GB of virtual memory space. | |
225 | ||
226 | If unsure, say "true". | |
227 | ||
eef015c8 CM |
228 | config ZONE_DMA |
229 | def_bool y | |
230 | ||
41bb38fc CM |
231 | config IOMMU_HELPER |
232 | bool | |
233 | ||
234 | config NEED_SG_DMA_LENGTH | |
235 | bool | |
236 | ||
237 | config SWIOTLB | |
238 | bool | |
239 | default TILEGX | |
240 | select IOMMU_HELPER | |
241 | select NEED_SG_DMA_LENGTH | |
242 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
243 | ||
867e359b CM |
244 | # We do not currently support disabling NUMA. |
245 | config NUMA | |
246 | bool # "NUMA Memory Allocation and Scheduler Support" | |
247 | depends on SMP && DISCONTIGMEM | |
248 | default y | |
249 | ---help--- | |
250 | NUMA memory allocation is required for TILE processors | |
251 | unless booting with memory striping enabled in the | |
252 | hypervisor, or with only a single memory controller. | |
253 | It is recommended that this option always be enabled. | |
254 | ||
255 | config NODES_SHIFT | |
256 | int "Log base 2 of the max number of memory controllers" | |
257 | default 2 | |
258 | depends on NEED_MULTIPLE_NODES | |
259 | ---help--- | |
260 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
261 | In a system with more controllers, this value should be raised. | |
262 | ||
867e359b CM |
263 | choice |
264 | depends on !TILEGX | |
6a108a14 | 265 | prompt "Memory split" if EXPERT |
867e359b CM |
266 | default VMSPLIT_3G |
267 | ---help--- | |
268 | Select the desired split between kernel and user memory. | |
269 | ||
270 | If the address range available to the kernel is less than the | |
271 | physical memory installed, the remaining memory will be available | |
272 | as "high memory". Accessing high memory is a little more costly | |
273 | than low memory, as it needs to be mapped into the kernel first. | |
274 | Note that increasing the kernel address space limits the range | |
275 | available to user programs, making the address space there | |
276 | tighter. Selecting anything other than the default 3G/1G split | |
277 | will also likely make your kernel incompatible with binary-only | |
278 | kernel modules. | |
279 | ||
280 | If you are not absolutely sure what you are doing, leave this | |
281 | option alone! | |
282 | ||
5592840b | 283 | config VMSPLIT_3_75G |
867e359b | 284 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 285 | config VMSPLIT_3_5G |
867e359b CM |
286 | bool "3.5G/0.5G user/kernel split" |
287 | config VMSPLIT_3G | |
288 | bool "3G/1G user/kernel split" | |
09c17eab CM |
289 | config VMSPLIT_2_75G |
290 | bool "2.75G/1.25G user/kernel split (for full 1G low memory)" | |
291 | config VMSPLIT_2_5G | |
292 | bool "2.5G/1.5G user/kernel split" | |
293 | config VMSPLIT_2_25G | |
294 | bool "2.25G/1.75G user/kernel split" | |
867e359b CM |
295 | config VMSPLIT_2G |
296 | bool "2G/2G user/kernel split" | |
297 | config VMSPLIT_1G | |
298 | bool "1G/3G user/kernel split" | |
299 | endchoice | |
300 | ||
301 | config PAGE_OFFSET | |
302 | hex | |
884197f7 | 303 | depends on !64BIT |
5592840b CM |
304 | default 0xF0000000 if VMSPLIT_3_75G |
305 | default 0xE0000000 if VMSPLIT_3_5G | |
09c17eab CM |
306 | default 0xB0000000 if VMSPLIT_2_75G |
307 | default 0xA0000000 if VMSPLIT_2_5G | |
308 | default 0x90000000 if VMSPLIT_2_25G | |
867e359b CM |
309 | default 0x80000000 if VMSPLIT_2G |
310 | default 0x40000000 if VMSPLIT_1G | |
311 | default 0xC0000000 | |
312 | ||
313 | source "mm/Kconfig" | |
314 | ||
bc1a298f CM |
315 | source "kernel/Kconfig.preempt" |
316 | ||
867e359b CM |
317 | config CMDLINE_BOOL |
318 | bool "Built-in kernel command line" | |
319 | default n | |
320 | ---help--- | |
321 | Allow for specifying boot arguments to the kernel at | |
322 | build time. On some systems (e.g. embedded ones), it is | |
323 | necessary or convenient to provide some or all of the | |
324 | kernel boot arguments with the kernel itself (that is, | |
325 | to not rely on the boot loader to provide them.) | |
326 | ||
327 | To compile command line arguments into the kernel, | |
328 | set this option to 'Y', then fill in the | |
329 | the boot arguments in CONFIG_CMDLINE. | |
330 | ||
331 | Systems with fully functional boot loaders (e.g. mboot, or | |
332 | if booting over PCI) should leave this option set to 'N'. | |
333 | ||
334 | config CMDLINE | |
335 | string "Built-in kernel command string" | |
336 | depends on CMDLINE_BOOL | |
337 | default "" | |
338 | ---help--- | |
339 | Enter arguments here that should be compiled into the kernel | |
340 | image and used at boot time. If the boot loader provides a | |
341 | command line at boot time, it is appended to this string to | |
342 | form the full kernel command line, when the system boots. | |
343 | ||
344 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
345 | change this behavior. | |
346 | ||
347 | In most cases, the command line (whether built-in or provided | |
348 | by the boot loader) should specify the device for the root | |
349 | file system. | |
350 | ||
351 | config CMDLINE_OVERRIDE | |
352 | bool "Built-in command line overrides boot loader arguments" | |
353 | default n | |
354 | depends on CMDLINE_BOOL | |
355 | ---help--- | |
356 | Set this option to 'Y' to have the kernel ignore the boot loader | |
357 | command line, and use ONLY the built-in command line. | |
358 | ||
359 | This is used to work around broken boot loaders. This should | |
360 | be set to 'N' under normal conditions. | |
361 | ||
362 | config VMALLOC_RESERVE | |
363 | hex | |
ad2a4bb3 | 364 | default 0x2000000 |
867e359b | 365 | |
9f9c0382 CM |
366 | config HARDWALL |
367 | bool "Hardwall support to allow access to user dynamic network" | |
368 | default y | |
369 | ||
a78c942d CM |
370 | config KERNEL_PL |
371 | int "Processor protection level for kernel" | |
372 | range 1 2 | |
c539914d CM |
373 | default 2 if TILEGX |
374 | default 1 if !TILEGX | |
a78c942d | 375 | ---help--- |
c539914d CM |
376 | Since MDE 4.2, the Tilera hypervisor runs the kernel |
377 | at PL2 by default. If running under an older hypervisor, | |
378 | or as a KVM guest, you must run at PL1. (The current | |
379 | hypervisor may also be recompiled with "make HV_PL=2" to | |
380 | allow it to run a kernel at PL1, but clients running at PL1 | |
381 | are not expected to be supported indefinitely.) | |
382 | ||
383 | If you're not sure, don't change the default. | |
a78c942d | 384 | |
37b82b5d CM |
385 | source "arch/tile/gxio/Kconfig" |
386 | ||
867e359b CM |
387 | endmenu # Tilera-specific configuration |
388 | ||
389 | menu "Bus options" | |
390 | ||
f02cbbe6 CM |
391 | config PCI |
392 | bool "PCI support" | |
393 | default y | |
394 | select PCI_DOMAINS | |
84550121 | 395 | select GENERIC_PCI_IOMAP |
12962267 | 396 | select TILE_GXIO_TRIO if TILEGX |
12962267 | 397 | select PCI_MSI if TILEGX |
f02cbbe6 CM |
398 | ---help--- |
399 | Enable PCI root complex support, so PCIe endpoint devices can | |
400 | be attached to the Tile chip. Many, but not all, PCI devices | |
401 | are supported under Tilera's root complex driver. | |
402 | ||
403 | config PCI_DOMAINS | |
404 | bool | |
405 | ||
867e359b CM |
406 | config NO_IOMEM |
407 | def_bool !PCI | |
408 | ||
409 | config NO_IOPORT | |
410 | def_bool !PCI | |
411 | ||
cf89c426 CM |
412 | config TILE_PCI_IO |
413 | bool "PCI I/O space support" | |
414 | default n | |
415 | depends on PCI | |
416 | depends on TILEGX | |
417 | ---help--- | |
418 | Enable PCI I/O space support on TILEGx. Since the PCI I/O space | |
419 | is used by few modern PCIe endpoint devices, its support is disabled | |
420 | by default to save the TRIO PIO Region resource for other purposes. | |
421 | ||
867e359b CM |
422 | source "drivers/pci/Kconfig" |
423 | ||
f62f73f6 CM |
424 | source "drivers/pci/pcie/Kconfig" |
425 | ||
47fc28bf CM |
426 | config TILE_USB |
427 | tristate "Tilera USB host adapter support" | |
428 | default y | |
429 | depends on USB | |
430 | depends on TILEGX | |
431 | select TILE_GXIO_USB_HOST | |
432 | ---help--- | |
433 | Provides USB host adapter support for the built-in EHCI and OHCI | |
434 | interfaces on TILE-Gx chips. | |
435 | ||
867e359b CM |
436 | source "drivers/pci/hotplug/Kconfig" |
437 | ||
438 | endmenu | |
439 | ||
440 | menu "Executable file formats" | |
441 | ||
867e359b CM |
442 | source "fs/Kconfig.binfmt" |
443 | ||
444 | endmenu | |
445 | ||
446 | source "net/Kconfig" | |
447 | ||
448 | source "drivers/Kconfig" | |
449 | ||
450 | source "fs/Kconfig" | |
451 | ||
452 | source "arch/tile/Kconfig.debug" | |
453 | ||
454 | source "security/Kconfig" | |
455 | ||
456 | source "crypto/Kconfig" | |
457 | ||
458 | source "lib/Kconfig" | |
a78c942d CM |
459 | |
460 | source "arch/tile/kvm/Kconfig" |