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 ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
28 select HAVE_DEBUG_STACKOVERFLOW
29 select ARCH_WANT_FRAME_POINTERS
30 select GENERIC_STRNCPY_FROM_USER
31 select GENERIC_STRNLEN_USER
33 # FIXME: investigate whether we need/want these options.
34 # select HAVE_IOREMAP_PROT
35 # select HAVE_OPTPROBES
36 # select HAVE_REGS_AND_STACK_ACCESS_API
37 # select HAVE_HW_BREAKPOINT
39 # select HAVE_USER_RETURN_NOTIFIER
41 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
42 # config HUGETLB_PAGE_SIZE_VARIABLE
50 config HAVE_ARCH_ALLOC_REMAP
53 config HAVE_SETUP_PER_CPU_AREA
56 config NEED_PER_CPU_PAGE_FIRST_CHUNK
59 config SYS_SUPPORTS_HUGETLBFS
62 # Support for additional huge page sizes besides HPAGE_SIZE.
63 # The software support is currently only present in the TILE-Gx
64 # hypervisor. TILEPro in any case does not support page sizes
65 # larger than the default HPAGE_SIZE.
66 config HUGETLB_SUPER_PAGES
67 depends on HUGETLB_PAGE && TILEGX
70 config GENERIC_TIME_VSYSCALL
73 # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled.
77 # FIXME: tilegx can implement a more efficient rwsem.
78 config RWSEM_GENERIC_SPINLOCK
81 # We only support gcc 4.4 and above, so this should work.
82 config ARCH_SUPPORTS_OPTIMIZED_INLINING
85 config ARCH_PHYS_ADDR_T_64BIT
88 config ARCH_DMA_ADDR_T_64BIT
91 config NEED_DMA_MAP_STATE
94 config ARCH_HAS_DMA_SET_COHERENT_MASK
97 config LOCKDEP_SUPPORT
100 config STACKTRACE_SUPPORT
104 # We use discontigmem for now; at some point we may want to switch
105 # to sparsemem (Tilera bug 7996).
106 config ARCH_DISCONTIGMEM_ENABLE
109 config ARCH_DISCONTIGMEM_DEFAULT
112 config TRACE_IRQFLAGS_SUPPORT
118 # SMP is required for Tilera Linux.
125 select HVC_IRQ if TILEGX
129 bool "Building for TILE-Gx (64-bit) processor"
131 select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
132 select HAVE_FUNCTION_TRACER
133 select HAVE_FUNCTION_GRAPH_TRACER
134 select HAVE_DYNAMIC_FTRACE
135 select HAVE_FTRACE_MCOUNT_RECORD
137 select HAVE_KRETPROBES
138 select HAVE_ARCH_KGDB
139 select ARCH_SUPPORTS_ATOMIC_RMW
147 config ARCH_DEFCONFIG
149 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
150 default "arch/tile/configs/tilegx_defconfig" if TILEGX
152 source "init/Kconfig"
154 source "kernel/Kconfig.freezer"
156 menu "Tilera-specific configuration"
159 int "Maximum number of tiles (2-255)"
164 Building with 64 is the recommended value, but a slightly
165 smaller kernel memory footprint results from using a smaller
166 value on chips with fewer tiles.
171 prompt "Kernel page size"
172 default PAGE_SIZE_64KB
174 This lets you select the page size of the kernel. For best
175 performance on memory-intensive applications, a page size of 64KB
176 is recommended. For workloads involving many small files, many
177 connections, etc., it may be better to select 16KB, which uses
178 memory more efficiently at some cost in TLB performance.
180 Note that this option is TILE-Gx specific; currently
181 TILEPro page size is set by rebuilding the hypervisor.
183 config PAGE_SIZE_16KB
186 config PAGE_SIZE_64KB
193 source "kernel/Kconfig.hz"
196 bool "kexec system call"
198 kexec is a system call that implements the ability to shutdown your
199 current kernel, and to start another kernel. It is like a reboot
200 but it is independent of the system firmware. It is used
201 to implement the "mboot" Tilera booter.
203 The name comes from the similarity to the exec system call.
206 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
208 select COMPAT_BINFMT_ELF
211 If enabled, the kernel will support running TILE-Gx binaries
212 that were built with the -m32 option.
214 config SYSVIPC_COMPAT
216 depends on COMPAT && SYSVIPC
218 # We do not currently support disabling HIGHMEM on tilepro.
220 bool # "Support for more than 512 MB of RAM"
223 Linux can use the full amount of RAM in the system by
224 default. However, the address space of TILE processors is
225 only 4 Gigabytes large. That means that, if you have a large
226 amount of physical memory, not all of it can be "permanently
227 mapped" by the kernel. The physical memory that's not
228 permanently mapped is called "high memory".
230 If you are compiling a kernel which will never run on a
231 machine with more than 512 MB total physical RAM, answer
232 "false" here. This will result in the kernel mapping all of
233 physical memory into the top 1 GB of virtual memory space.
235 If unsure, say "true".
243 config NEED_SG_DMA_LENGTH
250 select NEED_SG_DMA_LENGTH
251 select ARCH_HAS_DMA_SET_COHERENT_MASK
253 # We do not currently support disabling NUMA.
255 bool # "NUMA Memory Allocation and Scheduler Support"
256 depends on SMP && DISCONTIGMEM
259 NUMA memory allocation is required for TILE processors
260 unless booting with memory striping enabled in the
261 hypervisor, or with only a single memory controller.
262 It is recommended that this option always be enabled.
265 int "Log base 2 of the max number of memory controllers"
267 depends on NEED_MULTIPLE_NODES
269 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
270 In a system with more controllers, this value should be raised.
274 prompt "Memory split" if EXPERT
277 Select the desired split between kernel and user memory.
279 If the address range available to the kernel is less than the
280 physical memory installed, the remaining memory will be available
281 as "high memory". Accessing high memory is a little more costly
282 than low memory, as it needs to be mapped into the kernel first.
283 Note that increasing the kernel address space limits the range
284 available to user programs, making the address space there
285 tighter. Selecting anything other than the default 3G/1G split
286 will also likely make your kernel incompatible with binary-only
289 If you are not absolutely sure what you are doing, leave this
293 bool "3.75G/0.25G user/kernel split (no kernel networking)"
295 bool "3.5G/0.5G user/kernel split"
297 bool "3G/1G user/kernel split"
299 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
301 bool "2.5G/1.5G user/kernel split"
303 bool "2.25G/1.75G user/kernel split"
305 bool "2G/2G user/kernel split"
307 bool "1G/3G user/kernel split"
313 default 0xF0000000 if VMSPLIT_3_75G
314 default 0xE0000000 if VMSPLIT_3_5G
315 default 0xB0000000 if VMSPLIT_2_75G
316 default 0xA0000000 if VMSPLIT_2_5G
317 default 0x90000000 if VMSPLIT_2_25G
318 default 0x80000000 if VMSPLIT_2G
319 default 0x40000000 if VMSPLIT_1G
324 source "kernel/Kconfig.preempt"
327 bool "Built-in kernel command line"
330 Allow for specifying boot arguments to the kernel at
331 build time. On some systems (e.g. embedded ones), it is
332 necessary or convenient to provide some or all of the
333 kernel boot arguments with the kernel itself (that is,
334 to not rely on the boot loader to provide them.)
336 To compile command line arguments into the kernel,
337 set this option to 'Y', then fill in the
338 the boot arguments in CONFIG_CMDLINE.
340 Systems with fully functional boot loaders (e.g. mboot, or
341 if booting over PCI) should leave this option set to 'N'.
344 string "Built-in kernel command string"
345 depends on CMDLINE_BOOL
348 Enter arguments here that should be compiled into the kernel
349 image and used at boot time. If the boot loader provides a
350 command line at boot time, it is appended to this string to
351 form the full kernel command line, when the system boots.
353 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
354 change this behavior.
356 In most cases, the command line (whether built-in or provided
357 by the boot loader) should specify the device for the root
360 config CMDLINE_OVERRIDE
361 bool "Built-in command line overrides boot loader arguments"
363 depends on CMDLINE_BOOL
365 Set this option to 'Y' to have the kernel ignore the boot loader
366 command line, and use ONLY the built-in command line.
368 This is used to work around broken boot loaders. This should
369 be set to 'N' under normal conditions.
371 config VMALLOC_RESERVE
376 bool "Hardwall support to allow access to user dynamic network"
380 int "Processor protection level for kernel"
385 Since MDE 4.2, the Tilera hypervisor runs the kernel
386 at PL2 by default. If running under an older hypervisor,
387 or as a KVM guest, you must run at PL1. (The current
388 hypervisor may also be recompiled with "make HV_PL=2" to
389 allow it to run a kernel at PL1, but clients running at PL1
390 are not expected to be supported indefinitely.)
392 If you're not sure, don't change the default.
394 source "arch/tile/gxio/Kconfig"
396 endmenu # Tilera-specific configuration
404 select GENERIC_PCI_IOMAP
405 select TILE_GXIO_TRIO if TILEGX
406 select PCI_MSI if TILEGX
408 Enable PCI root complex support, so PCIe endpoint devices can
409 be attached to the Tile chip. Many, but not all, PCI devices
410 are supported under Tilera's root complex driver.
422 bool "PCI I/O space support"
427 Enable PCI I/O space support on TILEGx. Since the PCI I/O space
428 is used by few modern PCIe endpoint devices, its support is disabled
429 by default to save the TRIO PIO Region resource for other purposes.
431 source "drivers/pci/Kconfig"
433 source "drivers/pci/pcie/Kconfig"
436 tristate "Tilera USB host adapter support"
440 select TILE_GXIO_USB_HOST
442 Provides USB host adapter support for the built-in EHCI and OHCI
443 interfaces on TILE-Gx chips.
445 source "drivers/pci/hotplug/Kconfig"
449 menu "Executable file formats"
451 source "fs/Kconfig.binfmt"
457 source "drivers/Kconfig"
461 source "arch/tile/Kconfig.debug"
463 source "security/Kconfig"
465 source "crypto/Kconfig"
469 source "arch/tile/kvm/Kconfig"