4 select GENERIC_ATOMIC64
5 select GENERIC_CLOCKEVENTS
6 select GENERIC_IRQ_SHOW
7 select GENERIC_SMP_IDLE_THREAD
8 select HAVE_64BIT_ALIGNED_ACCESS
9 select HAVE_ARCH_TRACEHOOK
10 select HAVE_C_RECORDMCOUNT
11 select HAVE_DEBUG_KMEMLEAK
12 select HAVE_DYNAMIC_FTRACE
13 select HAVE_FTRACE_MCOUNT_RECORD
14 select HAVE_FUNCTION_TRACER
15 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
16 select HAVE_KERNEL_BZIP2
17 select HAVE_KERNEL_GZIP
18 select HAVE_KERNEL_LZO
21 select HAVE_MEMBLOCK_NODE_MAP
22 select HAVE_MOD_ARCH_SPECIFIC
24 select HAVE_PERF_EVENTS
25 select HAVE_SYSCALL_TRACEPOINTS
26 select HAVE_UNDERSCORE_SYMBOL_PREFIX
28 select MODULES_USE_ELF_RELA
30 select OF_EARLY_FLATTREE
32 select HAVE_DEBUG_STACKOVERFLOW
34 config STACKTRACE_SUPPORT
37 config LOCKDEP_SUPPORT
40 config HAVE_LATENCYTOP_SUPPORT
43 config RWSEM_GENERIC_SPINLOCK
46 config RWSEM_XCHGADD_ALGORITHM
49 config GENERIC_HWEIGHT
52 config GENERIC_CALIBRATE_DELAY
60 source "kernel/Kconfig.freezer"
62 menu "Processor type and features"
71 bool "Enable CPU hotplug support"
74 Say Y here to allow turning CPUs off and on. CPUs can be
75 controlled through /sys/devices/system/cpu.
77 Say N if you want to disable CPU hotplug.
80 bool "High Memory Support"
82 The address space of Meta processors is only 4 Gigabytes large
83 and it has to accommodate user address space, kernel address
84 space as well as some memory mapped IO. That means that, if you
85 have a large amount of physical memory and/or IO, not all of the
86 memory can be "permanently mapped" by the kernel. The physical
87 memory that is not permanently mapped is called "high memory".
89 Depending on the selected kernel/user memory split, minimum
90 vmalloc space and actual amount of RAM, you may not need this
91 option which should result in a slightly faster kernel.
95 source "arch/metag/mm/Kconfig"
97 source "arch/metag/Kconfig.soc"
102 Select this from the SoC config symbol to indicate that it contains a
108 Select this from the SoC config symbol to indicate that it contains a
112 bool "Symmetric multi-processing support"
113 depends on METAG_META21 && METAG_META21_MMU
114 select USE_GENERIC_SMP_HELPERS
116 This enables support for systems with more than one thread running
117 Linux. If you have a system with only one thread running Linux,
118 say N. Otherwise, say Y.
121 int "Maximum number of CPUs (2-4)" if SMP
126 config METAG_SMP_WRITE_REORDERING
129 This attempts to prevent cache-memory incoherence due to external
130 reordering of writes from different hardware threads when SMP is
131 enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
132 attempt to catch some of the cases, and also before writes to shared
133 memory in LOCK1 protected atomics and spinlocks.
134 This will not completely prevent cache incoherency on affected cores.
136 config METAG_LNKGET_AROUND_CACHE
138 depends on METAG_META21
140 This indicates that the LNKGET/LNKSET instructions go around the
141 cache, which requires some extra cache flushes when the memory needs
142 to be accessed by normal GET/SET instructions too.
145 prompt "Atomicity primitive"
146 default METAG_ATOMICITY_LNKGET
148 This option selects the mechanism for performing atomic operations.
150 config METAG_ATOMICITY_IRQSOFF
154 This option disables interrupts to achieve atomicity. This mechanism
157 config METAG_ATOMICITY_LNKGET
158 depends on METAG_META21
161 This option uses the LNKGET and LNKSET instructions to achieve
162 atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
163 Choose this option if your system requires low latency.
165 config METAG_ATOMICITY_LOCK1
169 This option uses the LOCK1 instruction for atomicity. This is mainly
170 provided as a debugging aid if the lnkget/lnkset atomicity primitive
171 isn't working properly.
177 depends on METAG_META21
180 This option allows processes to use FPU hardware available with this
181 CPU. If this option is not enabled FPU registers will not be saved
182 and restored on context-switch.
184 If you plan on running programs which are compiled to use hard floats
190 This option allows processes to use DSP hardware available
191 with this CPU. If this option is not enabled DSP registers
192 will not be saved and restored on context-switch.
194 If you plan on running DSP programs say Y here.
196 config METAG_PERFCOUNTER_IRQS
197 bool "PerfCounters interrupt support"
198 depends on METAG_META21
200 This option enables using interrupts to collect information from
201 Performance Counters. This option is supported in new META21
202 (starting from HTP265).
204 When disabled, Performance Counters information will be collected
205 based on Timer Interrupt.
207 config HW_PERF_EVENTS
208 def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
213 Say Y if you plan to use a DA debug adapter with Linux. The presence
214 of the DA will be detected automatically at boot, so it is safe to say
215 Y to this option even when booting without a DA.
217 This enables support for services provided by DA JTAG debug adapters,
219 - communication over DA channels (such as the console driver).
220 - use of the DA filesystem.
224 config METAG_BUILTIN_DTB
225 bool "Embed DTB in kernel image"
228 Embeds a device tree binary in the kernel image.
230 config METAG_BUILTIN_DTB_NAME
231 string "Built in DTB"
232 depends on METAG_BUILTIN_DTB
234 Set the name of the DTB to embed (leave blank to pick one
235 automatically based on kernel configuration).
238 bool "Default bootloader kernel arguments"
241 string "Kernel command line"
242 depends on CMDLINE_BOOL
244 On some architectures there is currently no way for the boot loader
245 to pass arguments to the kernel. For these architectures, you should
246 supply some command-line options at build time by entering them
250 bool "Force default kernel command string"
251 depends on CMDLINE_BOOL
253 Set this to have arguments from the default kernel command string
254 override those passed by the boot loader.
258 source "kernel/Kconfig.preempt"
260 source kernel/Kconfig.hz
264 menu "Power management options"
266 source kernel/power/Kconfig
270 menu "Executable file formats"
272 source "fs/Kconfig.binfmt"
278 source "drivers/Kconfig"
282 source "arch/metag/Kconfig.debug"
284 source "security/Kconfig"
286 source "crypto/Kconfig"