1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
6 select HAVE_PERF_EVENTS
7 select USE_PMC if PERF_EVENTS
9 select HAVE_DMA_API_DEBUG
10 select HAVE_KVM if !TILEGX
11 select GENERIC_FIND_FIRST_BIT
12 select SYSCTL_EXCEPTION_TRACE
13 select CC_OPTIMIZE_FOR_SIZE
14 select HAVE_DEBUG_KMEMLEAK
15 select GENERIC_IRQ_PROBE
16 select GENERIC_PENDING_IRQ if SMP
17 select GENERIC_IRQ_SHOW
18 select HAVE_DEBUG_BUGVERBOSE
21 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
22 select ARCH_HAVE_NMI_SAFE_CMPXCHG
23 select GENERIC_CLOCKEVENTS
24 select MODULES_USE_ELF_RELA
25 select HAVE_ARCH_TRACEHOOK
26 select HAVE_SYSCALL_TRACEPOINTS
27 select USER_STACKTRACE_SUPPORT
28 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
29 select HAVE_DEBUG_STACKOVERFLOW
30 select ARCH_WANT_FRAME_POINTERS
31 select HAVE_CONTEXT_TRACKING
33 select GENERIC_STRNCPY_FROM_USER
34 select GENERIC_STRNLEN_USER
36 # FIXME: investigate whether we need/want these options.
37 # select HAVE_IOREMAP_PROT
38 # select HAVE_OPTPROBES
39 # select HAVE_REGS_AND_STACK_ACCESS_API
40 # select HAVE_HW_BREAKPOINT
42 # select HAVE_USER_RETURN_NOTIFIER
44 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
45 # config HUGETLB_PAGE_SIZE_VARIABLE
53 config HAVE_ARCH_ALLOC_REMAP
56 config HAVE_SETUP_PER_CPU_AREA
59 config NEED_PER_CPU_PAGE_FIRST_CHUNK
62 config SYS_SUPPORTS_HUGETLBFS
65 # Support for additional huge page sizes besides HPAGE_SIZE.
66 # The software support is currently only present in the TILE-Gx
67 # hypervisor. TILEPro in any case does not support page sizes
68 # larger than the default HPAGE_SIZE.
69 config HUGETLB_SUPER_PAGES
70 depends on HUGETLB_PAGE && TILEGX
73 config GENERIC_TIME_VSYSCALL
76 # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled.
80 # FIXME: tilegx can implement a more efficient rwsem.
81 config RWSEM_GENERIC_SPINLOCK
84 # We only support gcc 4.4 and above, so this should work.
85 config ARCH_SUPPORTS_OPTIMIZED_INLINING
88 config ARCH_PHYS_ADDR_T_64BIT
91 config ARCH_DMA_ADDR_T_64BIT
94 config NEED_DMA_MAP_STATE
97 config ARCH_HAS_DMA_SET_COHERENT_MASK
100 config LOCKDEP_SUPPORT
103 config STACKTRACE_SUPPORT
107 # We use discontigmem for now; at some point we may want to switch
108 # to sparsemem (Tilera bug 7996).
109 config ARCH_DISCONTIGMEM_ENABLE
112 config ARCH_DISCONTIGMEM_DEFAULT
115 config TRACE_IRQFLAGS_SUPPORT
121 # SMP is required for Tilera Linux.
128 select HVC_IRQ if TILEGX
131 # Building with ARCH=tilegx (or ARCH=tile) implies using the
132 # 64-bit TILE-Gx toolchain, so force CONFIG_TILEGX on.
134 def_bool ARCH != "tilepro"
136 select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
137 select HAVE_FUNCTION_TRACER
138 select HAVE_FUNCTION_GRAPH_TRACER
139 select HAVE_DYNAMIC_FTRACE
140 select HAVE_FTRACE_MCOUNT_RECORD
142 select HAVE_KRETPROBES
143 select HAVE_ARCH_KGDB
144 select ARCH_SUPPORTS_ATOMIC_RMW
152 config ARCH_DEFCONFIG
154 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
155 default "arch/tile/configs/tilegx_defconfig" if TILEGX
157 config PGTABLE_LEVELS
162 source "init/Kconfig"
164 source "kernel/Kconfig.freezer"
166 menu "Tilera-specific configuration"
169 int "Maximum number of tiles (2-255)"
174 Building with 64 is the recommended value, but a slightly
175 smaller kernel memory footprint results from using a smaller
176 value on chips with fewer tiles.
181 prompt "Kernel page size"
182 default PAGE_SIZE_64KB
184 This lets you select the page size of the kernel. For best
185 performance on memory-intensive applications, a page size of 64KB
186 is recommended. For workloads involving many small files, many
187 connections, etc., it may be better to select 16KB, which uses
188 memory more efficiently at some cost in TLB performance.
190 Note that this option is TILE-Gx specific; currently
191 TILEPro page size is set by rebuilding the hypervisor.
193 config PAGE_SIZE_16KB
196 config PAGE_SIZE_64KB
203 source "kernel/Kconfig.hz"
206 bool "kexec system call"
208 kexec is a system call that implements the ability to shutdown your
209 current kernel, and to start another kernel. It is like a reboot
210 but it is independent of the system firmware. It is used
211 to implement the "mboot" Tilera booter.
213 The name comes from the similarity to the exec system call.
216 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
218 select COMPAT_BINFMT_ELF
221 If enabled, the kernel will support running TILE-Gx binaries
222 that were built with the -m32 option.
224 config SYSVIPC_COMPAT
226 depends on COMPAT && SYSVIPC
228 # We do not currently support disabling HIGHMEM on tilepro.
230 bool # "Support for more than 512 MB of RAM"
233 Linux can use the full amount of RAM in the system by
234 default. However, the address space of TILE processors is
235 only 4 Gigabytes large. That means that, if you have a large
236 amount of physical memory, not all of it can be "permanently
237 mapped" by the kernel. The physical memory that's not
238 permanently mapped is called "high memory".
240 If you are compiling a kernel which will never run on a
241 machine with more than 512 MB total physical RAM, answer
242 "false" here. This will result in the kernel mapping all of
243 physical memory into the top 1 GB of virtual memory space.
245 If unsure, say "true".
253 config NEED_SG_DMA_LENGTH
260 select NEED_SG_DMA_LENGTH
261 select ARCH_HAS_DMA_SET_COHERENT_MASK
263 # We do not currently support disabling NUMA.
265 bool # "NUMA Memory Allocation and Scheduler Support"
266 depends on SMP && DISCONTIGMEM
269 NUMA memory allocation is required for TILE processors
270 unless booting with memory striping enabled in the
271 hypervisor, or with only a single memory controller.
272 It is recommended that this option always be enabled.
275 int "Log base 2 of the max number of memory controllers"
277 depends on NEED_MULTIPLE_NODES
279 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
280 In a system with more controllers, this value should be raised.
284 prompt "Memory split" if EXPERT
287 Select the desired split between kernel and user memory.
289 If the address range available to the kernel is less than the
290 physical memory installed, the remaining memory will be available
291 as "high memory". Accessing high memory is a little more costly
292 than low memory, as it needs to be mapped into the kernel first.
293 Note that increasing the kernel address space limits the range
294 available to user programs, making the address space there
295 tighter. Selecting anything other than the default 3G/1G split
296 will also likely make your kernel incompatible with binary-only
299 If you are not absolutely sure what you are doing, leave this
303 bool "3.75G/0.25G user/kernel split (no kernel networking)"
305 bool "3.5G/0.5G user/kernel split"
307 bool "3G/1G user/kernel split"
309 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
311 bool "2.5G/1.5G user/kernel split"
313 bool "2.25G/1.75G user/kernel split"
315 bool "2G/2G user/kernel split"
317 bool "1G/3G user/kernel split"
323 default 0xF0000000 if VMSPLIT_3_75G
324 default 0xE0000000 if VMSPLIT_3_5G
325 default 0xB0000000 if VMSPLIT_2_75G
326 default 0xA0000000 if VMSPLIT_2_5G
327 default 0x90000000 if VMSPLIT_2_25G
328 default 0x80000000 if VMSPLIT_2G
329 default 0x40000000 if VMSPLIT_1G
334 source "kernel/Kconfig.preempt"
337 bool "Built-in kernel command line"
340 Allow for specifying boot arguments to the kernel at
341 build time. On some systems (e.g. embedded ones), it is
342 necessary or convenient to provide some or all of the
343 kernel boot arguments with the kernel itself (that is,
344 to not rely on the boot loader to provide them.)
346 To compile command line arguments into the kernel,
347 set this option to 'Y', then fill in the
348 the boot arguments in CONFIG_CMDLINE.
350 Systems with fully functional boot loaders (e.g. mboot, or
351 if booting over PCI) should leave this option set to 'N'.
354 string "Built-in kernel command string"
355 depends on CMDLINE_BOOL
358 Enter arguments here that should be compiled into the kernel
359 image and used at boot time. If the boot loader provides a
360 command line at boot time, it is appended to this string to
361 form the full kernel command line, when the system boots.
363 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
364 change this behavior.
366 In most cases, the command line (whether built-in or provided
367 by the boot loader) should specify the device for the root
370 config CMDLINE_OVERRIDE
371 bool "Built-in command line overrides boot loader arguments"
373 depends on CMDLINE_BOOL
375 Set this option to 'Y' to have the kernel ignore the boot loader
376 command line, and use ONLY the built-in command line.
378 This is used to work around broken boot loaders. This should
379 be set to 'N' under normal conditions.
381 config VMALLOC_RESERVE
386 bool "Hardwall support to allow access to user dynamic network"
390 int "Processor protection level for kernel"
395 Since MDE 4.2, the Tilera hypervisor runs the kernel
396 at PL2 by default. If running under an older hypervisor,
397 or as a KVM guest, you must run at PL1. (The current
398 hypervisor may also be recompiled with "make HV_PL=2" to
399 allow it to run a kernel at PL1, but clients running at PL1
400 are not expected to be supported indefinitely.)
402 If you're not sure, don't change the default.
404 source "arch/tile/gxio/Kconfig"
406 endmenu # Tilera-specific configuration
414 select GENERIC_PCI_IOMAP
415 select TILE_GXIO_TRIO if TILEGX
416 select PCI_MSI if TILEGX
418 Enable PCI root complex support, so PCIe endpoint devices can
419 be attached to the Tile chip. Many, but not all, PCI devices
420 are supported under Tilera's root complex driver.
432 bool "PCI I/O space support"
437 Enable PCI I/O space support on TILEGx. Since the PCI I/O space
438 is used by few modern PCIe endpoint devices, its support is disabled
439 by default to save the TRIO PIO Region resource for other purposes.
441 source "drivers/pci/Kconfig"
443 source "drivers/pci/pcie/Kconfig"
446 tristate "Tilera USB host adapter support"
450 select TILE_GXIO_USB_HOST
452 Provides USB host adapter support for the built-in EHCI and OHCI
453 interfaces on TILE-Gx chips.
455 source "drivers/pci/hotplug/Kconfig"
459 menu "Executable file formats"
461 source "fs/Kconfig.binfmt"
467 source "drivers/Kconfig"
471 source "arch/tile/Kconfig.debug"
473 source "security/Kconfig"
475 source "crypto/Kconfig"
479 source "arch/tile/kvm/Kconfig"