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 HAVE_CONTEXT_TRACKING
32 # FIXME: investigate whether we need/want these options.
33 # select HAVE_IOREMAP_PROT
34 # select HAVE_OPTPROBES
35 # select HAVE_REGS_AND_STACK_ACCESS_API
36 # select HAVE_HW_BREAKPOINT
38 # select HAVE_USER_RETURN_NOTIFIER
40 # config ARCH_SUPPORTS_DEBUG_PAGEALLOC
41 # config HUGETLB_PAGE_SIZE_VARIABLE
49 config HAVE_ARCH_ALLOC_REMAP
52 config HAVE_SETUP_PER_CPU_AREA
55 config NEED_PER_CPU_PAGE_FIRST_CHUNK
58 config SYS_SUPPORTS_HUGETLBFS
61 # Support for additional huge page sizes besides HPAGE_SIZE.
62 # The software support is currently only present in the TILE-Gx
63 # hypervisor. TILEPro in any case does not support page sizes
64 # larger than the default HPAGE_SIZE.
65 config HUGETLB_SUPER_PAGES
66 depends on HUGETLB_PAGE && TILEGX
69 config GENERIC_TIME_VSYSCALL
72 # Enable PMC if PERF_EVENTS, OPROFILE, or WATCHPOINTS are enabled.
76 # FIXME: tilegx can implement a more efficient rwsem.
77 config RWSEM_GENERIC_SPINLOCK
80 # We only support gcc 4.4 and above, so this should work.
81 config ARCH_SUPPORTS_OPTIMIZED_INLINING
84 config ARCH_PHYS_ADDR_T_64BIT
87 config ARCH_DMA_ADDR_T_64BIT
90 config NEED_DMA_MAP_STATE
93 config ARCH_HAS_DMA_SET_COHERENT_MASK
96 config LOCKDEP_SUPPORT
99 config STACKTRACE_SUPPORT
103 # We use discontigmem for now; at some point we may want to switch
104 # to sparsemem (Tilera bug 7996).
105 config ARCH_DISCONTIGMEM_ENABLE
108 config ARCH_DISCONTIGMEM_DEFAULT
111 config TRACE_IRQFLAGS_SUPPORT
117 # SMP is required for Tilera Linux.
124 select HVC_IRQ if TILEGX
128 bool "Building for TILE-Gx (64-bit) processor"
130 select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
131 select HAVE_FUNCTION_TRACER
132 select HAVE_FUNCTION_GRAPH_TRACER
133 select HAVE_DYNAMIC_FTRACE
134 select HAVE_FTRACE_MCOUNT_RECORD
136 select HAVE_KRETPROBES
137 select HAVE_ARCH_KGDB
138 select ARCH_SUPPORTS_ATOMIC_RMW
146 config ARCH_DEFCONFIG
148 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
149 default "arch/tile/configs/tilegx_defconfig" if TILEGX
151 config PGTABLE_LEVELS
156 source "init/Kconfig"
158 source "kernel/Kconfig.freezer"
160 menu "Tilera-specific configuration"
163 int "Maximum number of tiles (2-255)"
168 Building with 64 is the recommended value, but a slightly
169 smaller kernel memory footprint results from using a smaller
170 value on chips with fewer tiles.
175 prompt "Kernel page size"
176 default PAGE_SIZE_64KB
178 This lets you select the page size of the kernel. For best
179 performance on memory-intensive applications, a page size of 64KB
180 is recommended. For workloads involving many small files, many
181 connections, etc., it may be better to select 16KB, which uses
182 memory more efficiently at some cost in TLB performance.
184 Note that this option is TILE-Gx specific; currently
185 TILEPro page size is set by rebuilding the hypervisor.
187 config PAGE_SIZE_16KB
190 config PAGE_SIZE_64KB
197 source "kernel/Kconfig.hz"
200 bool "kexec system call"
202 kexec is a system call that implements the ability to shutdown your
203 current kernel, and to start another kernel. It is like a reboot
204 but it is independent of the system firmware. It is used
205 to implement the "mboot" Tilera booter.
207 The name comes from the similarity to the exec system call.
210 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
212 select COMPAT_BINFMT_ELF
215 If enabled, the kernel will support running TILE-Gx binaries
216 that were built with the -m32 option.
218 config SYSVIPC_COMPAT
220 depends on COMPAT && SYSVIPC
222 # We do not currently support disabling HIGHMEM on tilepro.
224 bool # "Support for more than 512 MB of RAM"
227 Linux can use the full amount of RAM in the system by
228 default. However, the address space of TILE processors is
229 only 4 Gigabytes large. That means that, if you have a large
230 amount of physical memory, not all of it can be "permanently
231 mapped" by the kernel. The physical memory that's not
232 permanently mapped is called "high memory".
234 If you are compiling a kernel which will never run on a
235 machine with more than 512 MB total physical RAM, answer
236 "false" here. This will result in the kernel mapping all of
237 physical memory into the top 1 GB of virtual memory space.
239 If unsure, say "true".
247 config NEED_SG_DMA_LENGTH
254 select NEED_SG_DMA_LENGTH
255 select ARCH_HAS_DMA_SET_COHERENT_MASK
257 # We do not currently support disabling NUMA.
259 bool # "NUMA Memory Allocation and Scheduler Support"
260 depends on SMP && DISCONTIGMEM
263 NUMA memory allocation is required for TILE processors
264 unless booting with memory striping enabled in the
265 hypervisor, or with only a single memory controller.
266 It is recommended that this option always be enabled.
269 int "Log base 2 of the max number of memory controllers"
271 depends on NEED_MULTIPLE_NODES
273 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
274 In a system with more controllers, this value should be raised.
278 prompt "Memory split" if EXPERT
281 Select the desired split between kernel and user memory.
283 If the address range available to the kernel is less than the
284 physical memory installed, the remaining memory will be available
285 as "high memory". Accessing high memory is a little more costly
286 than low memory, as it needs to be mapped into the kernel first.
287 Note that increasing the kernel address space limits the range
288 available to user programs, making the address space there
289 tighter. Selecting anything other than the default 3G/1G split
290 will also likely make your kernel incompatible with binary-only
293 If you are not absolutely sure what you are doing, leave this
297 bool "3.75G/0.25G user/kernel split (no kernel networking)"
299 bool "3.5G/0.5G user/kernel split"
301 bool "3G/1G user/kernel split"
303 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
305 bool "2.5G/1.5G user/kernel split"
307 bool "2.25G/1.75G user/kernel split"
309 bool "2G/2G user/kernel split"
311 bool "1G/3G user/kernel split"
317 default 0xF0000000 if VMSPLIT_3_75G
318 default 0xE0000000 if VMSPLIT_3_5G
319 default 0xB0000000 if VMSPLIT_2_75G
320 default 0xA0000000 if VMSPLIT_2_5G
321 default 0x90000000 if VMSPLIT_2_25G
322 default 0x80000000 if VMSPLIT_2G
323 default 0x40000000 if VMSPLIT_1G
328 source "kernel/Kconfig.preempt"
331 bool "Built-in kernel command line"
334 Allow for specifying boot arguments to the kernel at
335 build time. On some systems (e.g. embedded ones), it is
336 necessary or convenient to provide some or all of the
337 kernel boot arguments with the kernel itself (that is,
338 to not rely on the boot loader to provide them.)
340 To compile command line arguments into the kernel,
341 set this option to 'Y', then fill in the
342 the boot arguments in CONFIG_CMDLINE.
344 Systems with fully functional boot loaders (e.g. mboot, or
345 if booting over PCI) should leave this option set to 'N'.
348 string "Built-in kernel command string"
349 depends on CMDLINE_BOOL
352 Enter arguments here that should be compiled into the kernel
353 image and used at boot time. If the boot loader provides a
354 command line at boot time, it is appended to this string to
355 form the full kernel command line, when the system boots.
357 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
358 change this behavior.
360 In most cases, the command line (whether built-in or provided
361 by the boot loader) should specify the device for the root
364 config CMDLINE_OVERRIDE
365 bool "Built-in command line overrides boot loader arguments"
367 depends on CMDLINE_BOOL
369 Set this option to 'Y' to have the kernel ignore the boot loader
370 command line, and use ONLY the built-in command line.
372 This is used to work around broken boot loaders. This should
373 be set to 'N' under normal conditions.
375 config VMALLOC_RESERVE
380 bool "Hardwall support to allow access to user dynamic network"
384 int "Processor protection level for kernel"
389 Since MDE 4.2, the Tilera hypervisor runs the kernel
390 at PL2 by default. If running under an older hypervisor,
391 or as a KVM guest, you must run at PL1. (The current
392 hypervisor may also be recompiled with "make HV_PL=2" to
393 allow it to run a kernel at PL1, but clients running at PL1
394 are not expected to be supported indefinitely.)
396 If you're not sure, don't change the default.
398 source "arch/tile/gxio/Kconfig"
400 endmenu # Tilera-specific configuration
408 select GENERIC_PCI_IOMAP
409 select TILE_GXIO_TRIO if TILEGX
410 select PCI_MSI if TILEGX
412 Enable PCI root complex support, so PCIe endpoint devices can
413 be attached to the Tile chip. Many, but not all, PCI devices
414 are supported under Tilera's root complex driver.
426 bool "PCI I/O space support"
431 Enable PCI I/O space support on TILEGx. Since the PCI I/O space
432 is used by few modern PCIe endpoint devices, its support is disabled
433 by default to save the TRIO PIO Region resource for other purposes.
435 source "drivers/pci/Kconfig"
437 source "drivers/pci/pcie/Kconfig"
440 tristate "Tilera USB host adapter support"
444 select TILE_GXIO_USB_HOST
446 Provides USB host adapter support for the built-in EHCI and OHCI
447 interfaces on TILE-Gx chips.
449 source "drivers/pci/hotplug/Kconfig"
453 menu "Executable file formats"
455 source "fs/Kconfig.binfmt"
461 source "drivers/Kconfig"
465 source "arch/tile/Kconfig.debug"
467 source "security/Kconfig"
469 source "crypto/Kconfig"
473 source "arch/tile/kvm/Kconfig"