tjh.dev
Linux kernel mirror (for testing)
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linux
1# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/kconfig-language.txt.
3
4config TILE
5 def_bool y
6 select HAVE_DMA_ATTRS
7 select HAVE_DMA_API_DEBUG
8 select HAVE_KVM if !TILEGX
9 select GENERIC_FIND_FIRST_BIT
10 select SYSCTL_EXCEPTION_TRACE
11 select USE_GENERIC_SMP_HELPERS
12 select CC_OPTIMIZE_FOR_SIZE
13 select HAVE_DEBUG_KMEMLEAK
14 select GENERIC_IRQ_PROBE
15 select GENERIC_PENDING_IRQ if SMP
16 select GENERIC_IRQ_SHOW
17 select HAVE_DEBUG_BUGVERBOSE
18 select VIRT_TO_BUS
19 select SYS_HYPERVISOR
20 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
21 select ARCH_HAVE_NMI_SAFE_CMPXCHG
22 select GENERIC_CLOCKEVENTS
23 select MODULES_USE_ELF_RELA
24 select HAVE_ARCH_TRACEHOOK
25 select HAVE_SYSCALL_TRACEPOINTS
26 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
27 select HAVE_DEBUG_STACKOVERFLOW
28 select ARCH_WANT_FRAME_POINTERS
29
30# FIXME: investigate whether we need/want these options.
31# select HAVE_IOREMAP_PROT
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
40
41config MMU
42 def_bool y
43
44config GENERIC_CSUM
45 def_bool y
46
47config HAVE_ARCH_ALLOC_REMAP
48 def_bool y
49
50config HAVE_SETUP_PER_CPU_AREA
51 def_bool y
52
53config NEED_PER_CPU_PAGE_FIRST_CHUNK
54 def_bool y
55
56config SYS_SUPPORTS_HUGETLBFS
57 def_bool y
58
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.
63config HUGETLB_SUPER_PAGES
64 depends on HUGETLB_PAGE && TILEGX
65 def_bool y
66
67config GENERIC_TIME_VSYSCALL
68 def_bool y
69
70# FIXME: tilegx can implement a more efficient rwsem.
71config RWSEM_GENERIC_SPINLOCK
72 def_bool y
73
74# We only support gcc 4.4 and above, so this should work.
75config ARCH_SUPPORTS_OPTIMIZED_INLINING
76 def_bool y
77
78config ARCH_PHYS_ADDR_T_64BIT
79 def_bool y
80
81config ARCH_DMA_ADDR_T_64BIT
82 def_bool y
83
84config NEED_DMA_MAP_STATE
85 def_bool y
86
87config ARCH_HAS_DMA_SET_COHERENT_MASK
88 bool
89
90config LOCKDEP_SUPPORT
91 def_bool y
92
93config 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).
99config ARCH_DISCONTIGMEM_ENABLE
100 def_bool y
101
102config ARCH_DISCONTIGMEM_DEFAULT
103 def_bool y
104
105config TRACE_IRQFLAGS_SUPPORT
106 def_bool y
107
108config STRICT_DEVMEM
109 def_bool y
110
111# SMP is required for Tilera Linux.
112config SMP
113 def_bool y
114
115config HVC_TILE
116 depends on TTY
117 select HVC_DRIVER
118 select HVC_IRQ if TILEGX
119 def_bool y
120
121config TILEGX
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
128 select HAVE_KPROBES
129 select HAVE_KRETPROBES
130 select HAVE_ARCH_KGDB
131
132config TILEPRO
133 def_bool !TILEGX
134
135config 64BIT
136 def_bool TILEGX
137
138config ARCH_DEFCONFIG
139 string
140 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
141 default "arch/tile/configs/tilegx_defconfig" if TILEGX
142
143source "init/Kconfig"
144
145source "kernel/Kconfig.freezer"
146
147menu "Tilera-specific configuration"
148
149config 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
159if TILEGX
160
161choice
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
174config PAGE_SIZE_16KB
175 bool "16KB"
176
177config PAGE_SIZE_64KB
178 bool "64KB"
179
180endchoice
181
182endif
183
184source "kernel/Kconfig.hz"
185
186config 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
196config 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
205config SYSVIPC_COMPAT
206 def_bool y
207 depends on COMPAT && SYSVIPC
208
209# We do not currently support disabling HIGHMEM on tilepro.
210config 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
228config ZONE_DMA
229 def_bool y
230
231config IOMMU_HELPER
232 bool
233
234config NEED_SG_DMA_LENGTH
235 bool
236
237config 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
244# We do not currently support disabling NUMA.
245config 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
255config 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
263choice
264 depends on !TILEGX
265 prompt "Memory split" if EXPERT
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
283 config VMSPLIT_3_75G
284 bool "3.75G/0.25G user/kernel split (no kernel networking)"
285 config VMSPLIT_3_5G
286 bool "3.5G/0.5G user/kernel split"
287 config VMSPLIT_3G
288 bool "3G/1G user/kernel split"
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"
295 config VMSPLIT_2G
296 bool "2G/2G user/kernel split"
297 config VMSPLIT_1G
298 bool "1G/3G user/kernel split"
299endchoice
300
301config PAGE_OFFSET
302 hex
303 depends on !64BIT
304 default 0xF0000000 if VMSPLIT_3_75G
305 default 0xE0000000 if VMSPLIT_3_5G
306 default 0xB0000000 if VMSPLIT_2_75G
307 default 0xA0000000 if VMSPLIT_2_5G
308 default 0x90000000 if VMSPLIT_2_25G
309 default 0x80000000 if VMSPLIT_2G
310 default 0x40000000 if VMSPLIT_1G
311 default 0xC0000000
312
313source "mm/Kconfig"
314
315source "kernel/Kconfig.preempt"
316
317config 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
334config 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
351config 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
362config VMALLOC_RESERVE
363 hex
364 default 0x2000000
365
366config HARDWALL
367 bool "Hardwall support to allow access to user dynamic network"
368 default y
369
370config KERNEL_PL
371 int "Processor protection level for kernel"
372 range 1 2
373 default 2 if TILEGX
374 default 1 if !TILEGX
375 ---help---
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.
384
385source "arch/tile/gxio/Kconfig"
386
387endmenu # Tilera-specific configuration
388
389menu "Bus options"
390
391config PCI
392 bool "PCI support"
393 default y
394 select PCI_DOMAINS
395 select GENERIC_PCI_IOMAP
396 select TILE_GXIO_TRIO if TILEGX
397 select PCI_MSI if TILEGX
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
403config PCI_DOMAINS
404 bool
405
406config NO_IOMEM
407 def_bool !PCI
408
409config NO_IOPORT
410 def_bool !PCI
411
412config 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
422source "drivers/pci/Kconfig"
423
424source "drivers/pci/pcie/Kconfig"
425
426config 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
436source "drivers/pci/hotplug/Kconfig"
437
438endmenu
439
440menu "Executable file formats"
441
442source "fs/Kconfig.binfmt"
443
444endmenu
445
446source "net/Kconfig"
447
448source "drivers/Kconfig"
449
450source "fs/Kconfig"
451
452source "arch/tile/Kconfig.debug"
453
454source "security/Kconfig"
455
456source "crypto/Kconfig"
457
458source "lib/Kconfig"
459
460source "arch/tile/kvm/Kconfig"