Commit | Line | Data |
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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 |
8df27406 TG |
6 | select HAVE_KVM if !TILEGX |
7 | select GENERIC_FIND_FIRST_BIT | |
8 | select GENERIC_FIND_NEXT_BIT | |
9 | select USE_GENERIC_SMP_HELPERS | |
10 | select CC_OPTIMIZE_FOR_SIZE | |
11 | select HAVE_GENERIC_HARDIRQS | |
12 | select GENERIC_IRQ_PROBE | |
13 | select GENERIC_PENDING_IRQ if SMP | |
deb4b003 | 14 | select GENERIC_HARDIRQS_NO_DEPRECATED |
867e359b | 15 | |
8df27406 TG |
16 | # FIXME: investigate whether we need/want these options. |
17 | # select HAVE_IOREMAP_PROT | |
5fb682b0 CM |
18 | # select HAVE_OPTPROBES |
19 | # select HAVE_REGS_AND_STACK_ACCESS_API | |
20 | # select HAVE_HW_BREAKPOINT | |
21 | # select PERF_EVENTS | |
22 | # select HAVE_USER_RETURN_NOTIFIER | |
23 | # config NO_BOOTMEM | |
24 | # config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
25 | # config HUGETLB_PAGE_SIZE_VARIABLE | |
867e359b | 26 | |
8df27406 | 27 | config MMU |
867e359b CM |
28 | def_bool y |
29 | ||
8df27406 | 30 | config GENERIC_CSUM |
867e359b | 31 | def_bool y |
867e359b CM |
32 | |
33 | config SEMAPHORE_SLEEPERS | |
34 | def_bool y | |
35 | ||
36 | config HAVE_ARCH_ALLOC_REMAP | |
37 | def_bool y | |
38 | ||
39 | config HAVE_SETUP_PER_CPU_AREA | |
40 | def_bool y | |
41 | ||
42 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
5fb682b0 | 43 | def_bool y |
867e359b CM |
44 | |
45 | config SYS_SUPPORTS_HUGETLBFS | |
46 | def_bool y | |
47 | ||
48 | config GENERIC_TIME | |
49 | def_bool y | |
50 | ||
51 | config GENERIC_CLOCKEVENTS | |
52 | def_bool y | |
53 | ||
54 | # FIXME: tilegx can implement a more efficent rwsem. | |
55 | config RWSEM_GENERIC_SPINLOCK | |
56 | def_bool y | |
57 | ||
58 | # We have a very flat architecture from a migration point of view, | |
59 | # so save boot time by presetting this (particularly useful on tile-sim). | |
60 | config DEFAULT_MIGRATION_COST | |
61 | int | |
62 | default "10000000" | |
63 | ||
64 | # We only support gcc 4.4 and above, so this should work. | |
65 | config ARCH_SUPPORTS_OPTIMIZED_INLINING | |
66 | def_bool y | |
67 | ||
68 | config ARCH_PHYS_ADDR_T_64BIT | |
69 | def_bool y | |
70 | ||
d31eb519 FT |
71 | config ARCH_DMA_ADDR_T_64BIT |
72 | def_bool y | |
73 | ||
867e359b CM |
74 | config LOCKDEP_SUPPORT |
75 | def_bool y | |
76 | ||
77 | config STACKTRACE_SUPPORT | |
78 | def_bool y | |
79 | select STACKTRACE | |
80 | ||
81 | # We use discontigmem for now; at some point we may want to switch | |
82 | # to sparsemem (Tilera bug 7996). | |
83 | config ARCH_DISCONTIGMEM_ENABLE | |
84 | def_bool y | |
85 | ||
86 | config ARCH_DISCONTIGMEM_DEFAULT | |
87 | def_bool y | |
88 | ||
89 | config TRACE_IRQFLAGS_SUPPORT | |
90 | def_bool y | |
91 | ||
92 | config STRICT_DEVMEM | |
93 | def_bool y | |
94 | ||
95 | # SMP is required for Tilera Linux. | |
96 | config SMP | |
97 | def_bool y | |
98 | ||
99 | # Allow checking for compile-time determined overflow errors in | |
100 | # copy_from_user(). There are still unprovable places in the | |
101 | # generic code as of 2.6.34, so this option is not really compatible | |
102 | # with -Werror, which is more useful in general. | |
103 | config DEBUG_COPY_FROM_USER | |
104 | def_bool n | |
105 | ||
106 | config HVC_TILE | |
107 | select HVC_DRIVER | |
108 | def_bool y | |
109 | ||
867e359b CM |
110 | # Please note: TILE-Gx support is not yet finalized; this is |
111 | # the preliminary support. TILE-Gx drivers are only provided | |
112 | # with the alpha or beta test versions for Tilera customers. | |
113 | config TILEGX | |
114 | depends on EXPERIMENTAL | |
115 | bool "Building with TILE-Gx (64-bit) compiler and toolchain" | |
116 | ||
117 | config 64BIT | |
118 | depends on TILEGX | |
119 | def_bool y | |
120 | ||
121 | config ARCH_DEFCONFIG | |
122 | string | |
123 | default "arch/tile/configs/tile_defconfig" if !TILEGX | |
124 | default "arch/tile/configs/tilegx_defconfig" if TILEGX | |
125 | ||
126 | source "init/Kconfig" | |
127 | ||
128 | menu "Tilera-specific configuration" | |
129 | ||
130 | config NR_CPUS | |
131 | int "Maximum number of tiles (2-255)" | |
132 | range 2 255 | |
133 | depends on SMP | |
134 | default "64" | |
135 | ---help--- | |
136 | Building with 64 is the recommended value, but a slightly | |
137 | smaller kernel memory footprint results from using a smaller | |
138 | value on chips with fewer tiles. | |
139 | ||
140 | source "kernel/time/Kconfig" | |
141 | ||
142 | source "kernel/Kconfig.hz" | |
143 | ||
144 | config KEXEC | |
145 | bool "kexec system call" | |
146 | ---help--- | |
147 | kexec is a system call that implements the ability to shutdown your | |
148 | current kernel, and to start another kernel. It is like a reboot | |
149 | but it is independent of the system firmware. It is used | |
150 | to implement the "mboot" Tilera booter. | |
151 | ||
152 | The name comes from the similarity to the exec system call. | |
153 | ||
154 | config COMPAT | |
155 | bool "Support 32-bit TILE-Gx binaries in addition to 64-bit" | |
156 | depends on TILEGX | |
157 | select COMPAT_BINFMT_ELF | |
158 | default y | |
159 | ---help--- | |
160 | If enabled, the kernel will support running TILE-Gx binaries | |
161 | that were built with the -m32 option. | |
162 | ||
163 | config SYSVIPC_COMPAT | |
164 | def_bool y | |
165 | depends on COMPAT && SYSVIPC | |
166 | ||
167 | # We do not currently support disabling HIGHMEM on tile64 and tilepro. | |
168 | config HIGHMEM | |
169 | bool # "Support for more than 512 MB of RAM" | |
170 | default !TILEGX | |
171 | ---help--- | |
172 | Linux can use the full amount of RAM in the system by | |
173 | default. However, the address space of TILE processors is | |
174 | only 4 Gigabytes large. That means that, if you have a large | |
175 | amount of physical memory, not all of it can be "permanently | |
176 | mapped" by the kernel. The physical memory that's not | |
177 | permanently mapped is called "high memory". | |
178 | ||
179 | If you are compiling a kernel which will never run on a | |
180 | machine with more than 512 MB total physical RAM, answer | |
181 | "false" here. This will result in the kernel mapping all of | |
182 | physical memory into the top 1 GB of virtual memory space. | |
183 | ||
184 | If unsure, say "true". | |
185 | ||
186 | # We do not currently support disabling NUMA. | |
187 | config NUMA | |
188 | bool # "NUMA Memory Allocation and Scheduler Support" | |
189 | depends on SMP && DISCONTIGMEM | |
190 | default y | |
191 | ---help--- | |
192 | NUMA memory allocation is required for TILE processors | |
193 | unless booting with memory striping enabled in the | |
194 | hypervisor, or with only a single memory controller. | |
195 | It is recommended that this option always be enabled. | |
196 | ||
197 | config NODES_SHIFT | |
198 | int "Log base 2 of the max number of memory controllers" | |
199 | default 2 | |
200 | depends on NEED_MULTIPLE_NODES | |
201 | ---help--- | |
202 | By default, 2, i.e. 2^2 == 4 DDR2 controllers. | |
203 | In a system with more controllers, this value should be raised. | |
204 | ||
205 | # Need 16MB areas to enable hugetlb | |
206 | # See build-time check in arch/tile/mm/init.c. | |
207 | config FORCE_MAX_ZONEORDER | |
208 | int | |
209 | default 9 | |
210 | ||
211 | choice | |
212 | depends on !TILEGX | |
6a108a14 | 213 | prompt "Memory split" if EXPERT |
867e359b CM |
214 | default VMSPLIT_3G |
215 | ---help--- | |
216 | Select the desired split between kernel and user memory. | |
217 | ||
218 | If the address range available to the kernel is less than the | |
219 | physical memory installed, the remaining memory will be available | |
220 | as "high memory". Accessing high memory is a little more costly | |
221 | than low memory, as it needs to be mapped into the kernel first. | |
222 | Note that increasing the kernel address space limits the range | |
223 | available to user programs, making the address space there | |
224 | tighter. Selecting anything other than the default 3G/1G split | |
225 | will also likely make your kernel incompatible with binary-only | |
226 | kernel modules. | |
227 | ||
228 | If you are not absolutely sure what you are doing, leave this | |
229 | option alone! | |
230 | ||
5592840b | 231 | config VMSPLIT_3_75G |
867e359b | 232 | bool "3.75G/0.25G user/kernel split (no kernel networking)" |
5592840b | 233 | config VMSPLIT_3_5G |
867e359b CM |
234 | bool "3.5G/0.5G user/kernel split" |
235 | config VMSPLIT_3G | |
236 | bool "3G/1G user/kernel split" | |
237 | config VMSPLIT_3G_OPT | |
238 | bool "3G/1G user/kernel split (for full 1G low memory)" | |
239 | config VMSPLIT_2G | |
240 | bool "2G/2G user/kernel split" | |
241 | config VMSPLIT_1G | |
242 | bool "1G/3G user/kernel split" | |
243 | endchoice | |
244 | ||
245 | config PAGE_OFFSET | |
246 | hex | |
5592840b CM |
247 | default 0xF0000000 if VMSPLIT_3_75G |
248 | default 0xE0000000 if VMSPLIT_3_5G | |
867e359b CM |
249 | default 0xB0000000 if VMSPLIT_3G_OPT |
250 | default 0x80000000 if VMSPLIT_2G | |
251 | default 0x40000000 if VMSPLIT_1G | |
252 | default 0xC0000000 | |
253 | ||
254 | source "mm/Kconfig" | |
255 | ||
256 | config CMDLINE_BOOL | |
257 | bool "Built-in kernel command line" | |
258 | default n | |
259 | ---help--- | |
260 | Allow for specifying boot arguments to the kernel at | |
261 | build time. On some systems (e.g. embedded ones), it is | |
262 | necessary or convenient to provide some or all of the | |
263 | kernel boot arguments with the kernel itself (that is, | |
264 | to not rely on the boot loader to provide them.) | |
265 | ||
266 | To compile command line arguments into the kernel, | |
267 | set this option to 'Y', then fill in the | |
268 | the boot arguments in CONFIG_CMDLINE. | |
269 | ||
270 | Systems with fully functional boot loaders (e.g. mboot, or | |
271 | if booting over PCI) should leave this option set to 'N'. | |
272 | ||
273 | config CMDLINE | |
274 | string "Built-in kernel command string" | |
275 | depends on CMDLINE_BOOL | |
276 | default "" | |
277 | ---help--- | |
278 | Enter arguments here that should be compiled into the kernel | |
279 | image and used at boot time. If the boot loader provides a | |
280 | command line at boot time, it is appended to this string to | |
281 | form the full kernel command line, when the system boots. | |
282 | ||
283 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
284 | change this behavior. | |
285 | ||
286 | In most cases, the command line (whether built-in or provided | |
287 | by the boot loader) should specify the device for the root | |
288 | file system. | |
289 | ||
290 | config CMDLINE_OVERRIDE | |
291 | bool "Built-in command line overrides boot loader arguments" | |
292 | default n | |
293 | depends on CMDLINE_BOOL | |
294 | ---help--- | |
295 | Set this option to 'Y' to have the kernel ignore the boot loader | |
296 | command line, and use ONLY the built-in command line. | |
297 | ||
298 | This is used to work around broken boot loaders. This should | |
299 | be set to 'N' under normal conditions. | |
300 | ||
301 | config VMALLOC_RESERVE | |
302 | hex | |
303 | default 0x1000000 | |
304 | ||
9f9c0382 CM |
305 | config HARDWALL |
306 | bool "Hardwall support to allow access to user dynamic network" | |
307 | default y | |
308 | ||
a78c942d CM |
309 | config KERNEL_PL |
310 | int "Processor protection level for kernel" | |
311 | range 1 2 | |
312 | default "1" | |
313 | ---help--- | |
314 | This setting determines the processor protection level the | |
315 | kernel will be built to run at. Generally you should use | |
316 | the default value here. | |
317 | ||
867e359b CM |
318 | endmenu # Tilera-specific configuration |
319 | ||
320 | menu "Bus options" | |
321 | ||
f02cbbe6 CM |
322 | config PCI |
323 | bool "PCI support" | |
324 | default y | |
325 | select PCI_DOMAINS | |
326 | ---help--- | |
327 | Enable PCI root complex support, so PCIe endpoint devices can | |
328 | be attached to the Tile chip. Many, but not all, PCI devices | |
329 | are supported under Tilera's root complex driver. | |
330 | ||
331 | config PCI_DOMAINS | |
332 | bool | |
333 | ||
867e359b CM |
334 | config NO_IOMEM |
335 | def_bool !PCI | |
336 | ||
337 | config NO_IOPORT | |
338 | def_bool !PCI | |
339 | ||
340 | source "drivers/pci/Kconfig" | |
341 | ||
342 | source "drivers/pci/hotplug/Kconfig" | |
343 | ||
344 | endmenu | |
345 | ||
346 | menu "Executable file formats" | |
347 | ||
348 | # only elf supported | |
349 | config KCORE_ELF | |
350 | def_bool y | |
351 | depends on PROC_FS | |
352 | ||
353 | source "fs/Kconfig.binfmt" | |
354 | ||
355 | endmenu | |
356 | ||
357 | source "net/Kconfig" | |
358 | ||
359 | source "drivers/Kconfig" | |
360 | ||
361 | source "fs/Kconfig" | |
362 | ||
363 | source "arch/tile/Kconfig.debug" | |
364 | ||
365 | source "security/Kconfig" | |
366 | ||
367 | source "crypto/Kconfig" | |
368 | ||
369 | source "lib/Kconfig" | |
a78c942d CM |
370 | |
371 | source "arch/tile/kvm/Kconfig" |