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867e359b CM |
1 | # For a description of the syntax of this configuration file, |
2 | # see Documentation/kbuild/config-language.txt. | |
3 | ||
4 | config MMU | |
5 | def_bool y | |
6 | ||
7 | config GENERIC_CSUM | |
8 | def_bool y | |
9 | ||
10 | config GENERIC_HARDIRQS | |
11 | def_bool y | |
12 | ||
867e359b CM |
13 | config GENERIC_IRQ_PROBE |
14 | def_bool y | |
15 | ||
16 | config GENERIC_PENDING_IRQ | |
17 | def_bool y | |
18 | depends on GENERIC_HARDIRQS && SMP | |
19 | ||
20 | config SEMAPHORE_SLEEPERS | |
21 | def_bool y | |
22 | ||
23 | config HAVE_ARCH_ALLOC_REMAP | |
24 | def_bool y | |
25 | ||
26 | config HAVE_SETUP_PER_CPU_AREA | |
27 | def_bool y | |
28 | ||
29 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
30 | def_bool y | |
31 | ||
32 | config SYS_SUPPORTS_HUGETLBFS | |
33 | def_bool y | |
34 | ||
35 | config GENERIC_TIME | |
36 | def_bool y | |
37 | ||
38 | config GENERIC_CLOCKEVENTS | |
39 | def_bool y | |
40 | ||
41 | # FIXME: tilegx can implement a more efficent rwsem. | |
42 | config RWSEM_GENERIC_SPINLOCK | |
43 | def_bool y | |
44 | ||
45 | # We have a very flat architecture from a migration point of view, | |
46 | # so save boot time by presetting this (particularly useful on tile-sim). | |
47 | config DEFAULT_MIGRATION_COST | |
48 | int | |
49 | default "10000000" | |
50 | ||
51 | # We only support gcc 4.4 and above, so this should work. | |
52 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
53 | def_bool y | |
54 | ||
55 | config ARCH_PHYS_ADDR_T_64BIT | |
56 | def_bool y | |
57 | ||
d31eb519 FT |
58 | config ARCH_DMA_ADDR_T_64BIT |
59 | def_bool y | |
60 | ||
867e359b CM |
61 | config LOCKDEP_SUPPORT |
62 | def_bool y | |
63 | ||
64 | config STACKTRACE_SUPPORT | |
65 | def_bool y | |
66 | select STACKTRACE | |
67 | ||
68 | # We use discontigmem for now; at some point we may want to switch | |
69 | # to sparsemem (Tilera bug 7996). | |
70 | config ARCH_DISCONTIGMEM_ENABLE | |
71 | def_bool y | |
72 | ||
73 | config ARCH_DISCONTIGMEM_DEFAULT | |
74 | def_bool y | |
75 | ||
76 | config TRACE_IRQFLAGS_SUPPORT | |
77 | def_bool y | |
78 | ||
79 | config STRICT_DEVMEM | |
80 | def_bool y | |
81 | ||
82 | # SMP is required for Tilera Linux. | |
83 | config SMP | |
84 | def_bool y | |
85 | ||
86 | # Allow checking for compile-time determined overflow errors in | |
87 | # copy_from_user(). There are still unprovable places in the | |
88 | # generic code as of 2.6.34, so this option is not really compatible | |
89 | # with -Werror, which is more useful in general. | |
90 | config DEBUG_COPY_FROM_USER | |
91 | def_bool n | |
92 | ||
93 | config HVC_TILE | |
94 | select HVC_DRIVER | |
95 | def_bool y | |
96 | ||
97 | config TILE | |
98 | def_bool y | |
a78c942d | 99 | select HAVE_KVM if !TILEGX |
867e359b CM |
100 | select GENERIC_FIND_FIRST_BIT |
101 | select GENERIC_FIND_NEXT_BIT | |
102 | select USE_GENERIC_SMP_HELPERS | |
103 | select CC_OPTIMIZE_FOR_SIZE | |
104 | ||
105 | # FIXME: investigate whether we need/want these options. | |
106 | # select HAVE_IOREMAP_PROT | |
107 | # select HAVE_OPTPROBES | |
108 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
109 | # select HAVE_HW_BREAKPOINT | |
110 | # select PERF_EVENTS | |
111 | # select HAVE_USER_RETURN_NOTIFIER | |
112 | # config NO_BOOTMEM | |
113 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
114 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
115 | ||
116 | ||
867e359b CM |
117 | # Please note: TILE-Gx support is not yet finalized; this is |
118 | # the preliminary support. TILE-Gx drivers are only provided | |
119 | # with the alpha or beta test versions for Tilera customers. | |
120 | config TILEGX | |
121 | depends on EXPERIMENTAL | |
122 | bool "Building with TILE-Gx (64-bit) compiler and toolchain" | |
123 | ||
124 | config 64BIT | |
125 | depends on TILEGX | |
126 | def_bool y | |
127 | ||
128 | config ARCH_DEFCONFIG | |
129 | string | |
130 | default "arch/tile/configs/tile_defconfig" if !TILEGX | |
131 | default "arch/tile/configs/tilegx_defconfig" if TILEGX | |
132 | ||
133 | source "init/Kconfig" | |
134 | ||
135 | menu "Tilera-specific configuration" | |
136 | ||
137 | config NR_CPUS | |
138 | int "Maximum number of tiles (2-255)" | |
139 | range 2 255 | |
140 | depends on SMP | |
141 | default "64" | |
142 | ---help--- | |
143 | Building with 64 is the recommended value, but a slightly | |
144 | smaller kernel memory footprint results from using a smaller | |
145 | value on chips with fewer tiles. | |
146 | ||
147 | source "kernel/time/Kconfig" | |
148 | ||
149 | source "kernel/Kconfig.hz" | |
150 | ||
151 | config KEXEC | |
152 | bool "kexec system call" | |
153 | ---help--- | |
154 | kexec is a system call that implements the ability to shutdown your | |
155 | current kernel, and to start another kernel. It is like a reboot | |
156 | but it is independent of the system firmware. It is used | |
157 | to implement the "mboot" Tilera booter. | |
158 | ||
159 | The name comes from the similarity to the exec system call. | |
160 | ||
161 | config COMPAT | |
162 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
163 | depends on TILEGX | |
164 | select COMPAT_BINFMT_ELF | |
165 | default y | |
166 | ---help--- | |
167 | If enabled, the kernel will support running TILE-Gx binaries | |
168 | that were built with the -m32 option. | |
169 | ||
170 | config SYSVIPC_COMPAT | |
171 | def_bool y | |
172 | depends on COMPAT && SYSVIPC | |
173 | ||
174 | # We do not currently support disabling HIGHMEM on tile64 and tilepro. | |
175 | config HIGHMEM | |
176 | bool # "Support for more than 512 MB of RAM" | |
177 | default !TILEGX | |
178 | ---help--- | |
179 | Linux can use the full amount of RAM in the system by | |
180 | default. However, the address space of TILE processors is | |
181 | only 4 Gigabytes large. That means that, if you have a large | |
182 | amount of physical memory, not all of it can be "permanently | |
183 | mapped" by the kernel. The physical memory that's not | |
184 | permanently mapped is called "high memory". | |
185 | ||
186 | If you are compiling a kernel which will never run on a | |
187 | machine with more than 512 MB total physical RAM, answer | |
188 | "false" here. This will result in the kernel mapping all of | |
189 | physical memory into the top 1 GB of virtual memory space. | |
190 | ||
191 | If unsure, say "true". | |
192 | ||
193 | # We do not currently support disabling NUMA. | |
194 | config NUMA | |
195 | bool # "NUMA Memory Allocation and Scheduler Support" | |
196 | depends on SMP && DISCONTIGMEM | |
197 | default y | |
198 | ---help--- | |
199 | NUMA memory allocation is required for TILE processors | |
200 | unless booting with memory striping enabled in the | |
201 | hypervisor, or with only a single memory controller. | |
202 | It is recommended that this option always be enabled. | |
203 | ||
204 | config NODES_SHIFT | |
205 | int "Log base 2 of the max number of memory controllers" | |
206 | default 2 | |
207 | depends on NEED_MULTIPLE_NODES | |
208 | ---help--- | |
209 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
210 | In a system with more controllers, this value should be raised. | |
211 | ||
212 | # Need 16MB areas to enable hugetlb | |
213 | # See build-time check in arch/tile/mm/init.c. | |
214 | config FORCE_MAX_ZONEORDER | |
215 | int | |
216 | default 9 | |
217 | ||
218 | choice | |
219 | depends on !TILEGX | |
6a108a14 | 220 | prompt "Memory split" if EXPERT |
867e359b CM |
221 | default VMSPLIT_3G |
222 | ---help--- | |
223 | Select the desired split between kernel and user memory. | |
224 | ||
225 | If the address range available to the kernel is less than the | |
226 | physical memory installed, the remaining memory will be available | |
227 | as "high memory". Accessing high memory is a little more costly | |
228 | than low memory, as it needs to be mapped into the kernel first. | |
229 | Note that increasing the kernel address space limits the range | |
230 | available to user programs, making the address space there | |
231 | tighter. Selecting anything other than the default 3G/1G split | |
232 | will also likely make your kernel incompatible with binary-only | |
233 | kernel modules. | |
234 | ||
235 | If you are not absolutely sure what you are doing, leave this | |
236 | option alone! | |
237 | ||
5592840b | 238 | config VMSPLIT_3_75G |
867e359b | 239 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 240 | config VMSPLIT_3_5G |
867e359b CM |
241 | bool "3.5G/0.5G user/kernel split" |
242 | config VMSPLIT_3G | |
243 | bool "3G/1G user/kernel split" | |
244 | config VMSPLIT_3G_OPT | |
245 | bool "3G/1G user/kernel split (for full 1G low memory)" | |
246 | config VMSPLIT_2G | |
247 | bool "2G/2G user/kernel split" | |
248 | config VMSPLIT_1G | |
249 | bool "1G/3G user/kernel split" | |
250 | endchoice | |
251 | ||
252 | config PAGE_OFFSET | |
253 | hex | |
5592840b CM |
254 | default 0xF0000000 if VMSPLIT_3_75G |
255 | default 0xE0000000 if VMSPLIT_3_5G | |
867e359b CM |
256 | default 0xB0000000 if VMSPLIT_3G_OPT |
257 | default 0x80000000 if VMSPLIT_2G | |
258 | default 0x40000000 if VMSPLIT_1G | |
259 | default 0xC0000000 | |
260 | ||
261 | source "mm/Kconfig" | |
262 | ||
263 | config CMDLINE_BOOL | |
264 | bool "Built-in kernel command line" | |
265 | default n | |
266 | ---help--- | |
267 | Allow for specifying boot arguments to the kernel at | |
268 | build time. On some systems (e.g. embedded ones), it is | |
269 | necessary or convenient to provide some or all of the | |
270 | kernel boot arguments with the kernel itself (that is, | |
271 | to not rely on the boot loader to provide them.) | |
272 | ||
273 | To compile command line arguments into the kernel, | |
274 | set this option to 'Y', then fill in the | |
275 | the boot arguments in CONFIG_CMDLINE. | |
276 | ||
277 | Systems with fully functional boot loaders (e.g. mboot, or | |
278 | if booting over PCI) should leave this option set to 'N'. | |
279 | ||
280 | config CMDLINE | |
281 | string "Built-in kernel command string" | |
282 | depends on CMDLINE_BOOL | |
283 | default "" | |
284 | ---help--- | |
285 | Enter arguments here that should be compiled into the kernel | |
286 | image and used at boot time. If the boot loader provides a | |
287 | command line at boot time, it is appended to this string to | |
288 | form the full kernel command line, when the system boots. | |
289 | ||
290 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
291 | change this behavior. | |
292 | ||
293 | In most cases, the command line (whether built-in or provided | |
294 | by the boot loader) should specify the device for the root | |
295 | file system. | |
296 | ||
297 | config CMDLINE_OVERRIDE | |
298 | bool "Built-in command line overrides boot loader arguments" | |
299 | default n | |
300 | depends on CMDLINE_BOOL | |
301 | ---help--- | |
302 | Set this option to 'Y' to have the kernel ignore the boot loader | |
303 | command line, and use ONLY the built-in command line. | |
304 | ||
305 | This is used to work around broken boot loaders. This should | |
306 | be set to 'N' under normal conditions. | |
307 | ||
308 | config VMALLOC_RESERVE | |
309 | hex | |
310 | default 0x1000000 | |
311 | ||
9f9c0382 CM |
312 | config HARDWALL |
313 | bool "Hardwall support to allow access to user dynamic network" | |
314 | default y | |
315 | ||
a78c942d CM |
316 | config KERNEL_PL |
317 | int "Processor protection level for kernel" | |
318 | range 1 2 | |
319 | default "1" | |
320 | ---help--- | |
321 | This setting determines the processor protection level the | |
322 | kernel will be built to run at. Generally you should use | |
323 | the default value here. | |
324 | ||
867e359b CM |
325 | endmenu # Tilera-specific configuration |
326 | ||
327 | menu "Bus options" | |
328 | ||
f02cbbe6 CM |
329 | config PCI |
330 | bool "PCI support" | |
331 | default y | |
332 | select PCI_DOMAINS | |
333 | ---help--- | |
334 | Enable PCI root complex support, so PCIe endpoint devices can | |
335 | be attached to the Tile chip. Many, but not all, PCI devices | |
336 | are supported under Tilera's root complex driver. | |
337 | ||
338 | config PCI_DOMAINS | |
339 | bool | |
340 | ||
867e359b CM |
341 | config NO_IOMEM |
342 | def_bool !PCI | |
343 | ||
344 | config NO_IOPORT | |
345 | def_bool !PCI | |
346 | ||
347 | source "drivers/pci/Kconfig" | |
348 | ||
349 | source "drivers/pci/hotplug/Kconfig" | |
350 | ||
351 | endmenu | |
352 | ||
353 | menu "Executable file formats" | |
354 | ||
355 | # only elf supported | |
356 | config KCORE_ELF | |
357 | def_bool y | |
358 | depends on PROC_FS | |
359 | ||
360 | source "fs/Kconfig.binfmt" | |
361 | ||
362 | endmenu | |
363 | ||
364 | source "net/Kconfig" | |
365 | ||
366 | source "drivers/Kconfig" | |
367 | ||
368 | source "fs/Kconfig" | |
369 | ||
370 | source "arch/tile/Kconfig.debug" | |
371 | ||
372 | source "security/Kconfig" | |
373 | ||
374 | source "crypto/Kconfig" | |
375 | ||
376 | source "lib/Kconfig" | |
a78c942d CM |
377 | |
378 | source "arch/tile/kvm/Kconfig" |