Commit | Line | Data |
---|---|---|
fbe934d6 PD |
1 | # |
2 | # For a description of the syntax of this configuration file, | |
3 | # see Documentation/kbuild/kconfig-language.txt. | |
4 | # | |
5 | ||
c3e4ed01 CH |
6 | config 64BIT |
7 | bool | |
8 | ||
9 | config 32BIT | |
10 | bool | |
11 | ||
fbe934d6 PD |
12 | config RISCV |
13 | def_bool y | |
d4a451d5 CH |
14 | # even on 32-bit, physical (and DMA) addresses are > 32-bits |
15 | select PHYS_ADDR_T_64BIT | |
fbe934d6 PD |
16 | select OF |
17 | select OF_EARLY_FLATTREE | |
18 | select OF_IRQ | |
fbe934d6 PD |
19 | select ARCH_WANT_FRAME_POINTERS |
20 | select CLONE_BACKWARDS | |
21 | select COMMON_CLK | |
86e11757 | 22 | select DMA_DIRECT_OPS |
fbe934d6 PD |
23 | select GENERIC_CLOCKEVENTS |
24 | select GENERIC_CPU_DEVICES | |
25 | select GENERIC_IRQ_SHOW | |
26 | select GENERIC_PCI_IOMAP | |
9b9afe4a | 27 | select GENERIC_SCHED_CLOCK |
fbe934d6 PD |
28 | select GENERIC_STRNCPY_FROM_USER |
29 | select GENERIC_STRNLEN_USER | |
30 | select GENERIC_SMP_IDLE_THREAD | |
31 | select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A | |
5ec9c4ff | 32 | select HAVE_MEMBLOCK_NODE_MAP |
fbe934d6 | 33 | select HAVE_DMA_CONTIGUOUS |
b90edb33 | 34 | select HAVE_FUTEX_CMPXCHG if FUTEX |
fbe934d6 | 35 | select HAVE_GENERIC_DMA_COHERENT |
178e9fc4 | 36 | select HAVE_PERF_EVENTS |
fbe934d6 | 37 | select IRQ_DOMAIN |
fbe934d6 PD |
38 | select RISCV_ISA_A if SMP |
39 | select SPARSE_IRQ | |
40 | select SYSCTL_EXCEPTION_TRACE | |
41 | select HAVE_ARCH_TRACEHOOK | |
42 | select MODULES_USE_ELF_RELA if MODULES | |
43 | select THREAD_INFO_IN_TASK | |
fbe934d6 | 44 | select RISCV_TIMER |
cc6c9848 | 45 | select GENERIC_IRQ_MULTI_HANDLER |
3010a5ea | 46 | select ARCH_HAS_PTE_SPECIAL |
fbe934d6 PD |
47 | |
48 | config MMU | |
49 | def_bool y | |
50 | ||
5ec9c4ff CH |
51 | config ZONE_DMA32 |
52 | bool | |
f1306f04 | 53 | default y if 64BIT |
5ec9c4ff | 54 | |
fbe934d6 PD |
55 | config PAGE_OFFSET |
56 | hex | |
57 | default 0xC0000000 if 32BIT && MAXPHYSMEM_2GB | |
58 | default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB | |
59 | default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB | |
60 | ||
61 | config STACKTRACE_SUPPORT | |
62 | def_bool y | |
63 | ||
10626c32 AK |
64 | config TRACE_IRQFLAGS_SUPPORT |
65 | def_bool y | |
66 | ||
fbe934d6 PD |
67 | config RWSEM_GENERIC_SPINLOCK |
68 | def_bool y | |
69 | ||
70 | config GENERIC_BUG | |
71 | def_bool y | |
72 | depends on BUG | |
73 | select GENERIC_BUG_RELATIVE_POINTERS if 64BIT | |
74 | ||
75 | config GENERIC_BUG_RELATIVE_POINTERS | |
76 | bool | |
77 | ||
78 | config GENERIC_CALIBRATE_DELAY | |
79 | def_bool y | |
80 | ||
81 | config GENERIC_CSUM | |
82 | def_bool y | |
83 | ||
84 | config GENERIC_HWEIGHT | |
85 | def_bool y | |
86 | ||
87 | config PGTABLE_LEVELS | |
88 | int | |
89 | default 3 if 64BIT | |
90 | default 2 | |
91 | ||
92 | config HAVE_KPROBES | |
93 | def_bool n | |
94 | ||
fbe934d6 PD |
95 | menu "Platform type" |
96 | ||
97 | choice | |
98 | prompt "Base ISA" | |
99 | default ARCH_RV64I | |
100 | help | |
101 | This selects the base ISA that this kernel will traget and must match | |
102 | the target platform. | |
103 | ||
104 | config ARCH_RV32I | |
105 | bool "RV32I" | |
fbe934d6 | 106 | select 32BIT |
e3d59805 MR |
107 | select GENERIC_LIB_ASHLDI3 |
108 | select GENERIC_LIB_ASHRDI3 | |
109 | select GENERIC_LIB_LSHRDI3 | |
8f79125d | 110 | select GENERIC_LIB_UCMPDI2 |
fbe934d6 PD |
111 | |
112 | config ARCH_RV64I | |
113 | bool "RV64I" | |
fbe934d6 | 114 | select 64BIT |
ee592884 | 115 | select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 |
10626c32 AK |
116 | select HAVE_FUNCTION_TRACER |
117 | select HAVE_FUNCTION_GRAPH_TRACER | |
a1d2a6b4 | 118 | select HAVE_FTRACE_MCOUNT_RECORD |
c15ac4fd | 119 | select HAVE_DYNAMIC_FTRACE |
aea4c671 | 120 | select HAVE_DYNAMIC_FTRACE_WITH_REGS |
10314e09 | 121 | select SWIOTLB |
fbe934d6 PD |
122 | |
123 | endchoice | |
124 | ||
125 | # We must be able to map all physical memory into the kernel, but the compiler | |
126 | # is still a bit more efficient when generating code if it's setup in a manner | |
127 | # such that it can only map 2GiB of memory. | |
128 | choice | |
129 | prompt "Kernel Code Model" | |
130 | default CMODEL_MEDLOW if 32BIT | |
131 | default CMODEL_MEDANY if 64BIT | |
132 | ||
133 | config CMODEL_MEDLOW | |
134 | bool "medium low code model" | |
135 | config CMODEL_MEDANY | |
136 | bool "medium any code model" | |
137 | endchoice | |
138 | ||
ab1ef68e ZL |
139 | config MODULE_SECTIONS |
140 | bool | |
141 | select HAVE_MOD_ARCH_SPECIFIC | |
142 | ||
fbe934d6 PD |
143 | choice |
144 | prompt "Maximum Physical Memory" | |
145 | default MAXPHYSMEM_2GB if 32BIT | |
146 | default MAXPHYSMEM_2GB if 64BIT && CMODEL_MEDLOW | |
147 | default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY | |
148 | ||
149 | config MAXPHYSMEM_2GB | |
150 | bool "2GiB" | |
151 | config MAXPHYSMEM_128GB | |
152 | depends on 64BIT && CMODEL_MEDANY | |
ab1ef68e | 153 | select MODULE_SECTIONS if MODULES |
fbe934d6 PD |
154 | bool "128GiB" |
155 | endchoice | |
156 | ||
157 | ||
158 | config SMP | |
159 | bool "Symmetric Multi-Processing" | |
160 | help | |
161 | This enables support for systems with more than one CPU. If | |
162 | you say N here, the kernel will run on single and | |
163 | multiprocessor machines, but will use only one CPU of a | |
164 | multiprocessor machine. If you say Y here, the kernel will run | |
165 | on many, but not all, single processor machines. On a single | |
166 | processor machine, the kernel will run faster if you say N | |
167 | here. | |
168 | ||
169 | If you don't know what to do here, say N. | |
170 | ||
171 | config NR_CPUS | |
172 | int "Maximum number of CPUs (2-32)" | |
173 | range 2 32 | |
174 | depends on SMP | |
175 | default "8" | |
176 | ||
fbe934d6 PD |
177 | choice |
178 | prompt "CPU Tuning" | |
179 | default TUNE_GENERIC | |
180 | ||
181 | config TUNE_GENERIC | |
182 | bool "generic" | |
183 | ||
184 | endchoice | |
185 | ||
186 | config RISCV_ISA_C | |
187 | bool "Emit compressed instructions when building Linux" | |
188 | default y | |
189 | help | |
190 | Adds "C" to the ISA subsets that the toolchain is allowed to emit | |
191 | when building Linux, which results in compressed instructions in the | |
192 | Linux binary. | |
193 | ||
194 | If you don't know what to do here, say Y. | |
195 | ||
196 | config RISCV_ISA_A | |
197 | def_bool y | |
198 | ||
178e9fc4 AK |
199 | menu "supported PMU type" |
200 | depends on PERF_EVENTS | |
201 | ||
202 | config RISCV_BASE_PMU | |
203 | bool "Base Performance Monitoring Unit" | |
204 | def_bool y | |
205 | help | |
206 | A base PMU that serves as a reference implementation and has limited | |
207 | feature of perf. It can run on any RISC-V machines so serves as the | |
208 | fallback, but this option can also be disable to reduce kernel size. | |
209 | ||
210 | endmenu | |
211 | ||
9671f706 AK |
212 | config FPU |
213 | bool "FPU support" | |
214 | default y | |
215 | help | |
216 | Say N here if you want to disable all floating-point related procedure | |
217 | in the kernel. | |
218 | ||
219 | If you don't know what to do here, say Y. | |
220 | ||
fbe934d6 PD |
221 | endmenu |
222 | ||
aef53f97 | 223 | menu "Kernel features" |
fbe934d6 | 224 | |
fbe934d6 PD |
225 | source "kernel/Kconfig.hz" |
226 | ||
227 | endmenu | |
228 | ||
aef53f97 NK |
229 | menu "Boot options" |
230 | ||
3aed8c43 NK |
231 | config CMDLINE |
232 | string "Built-in kernel command line" | |
aef53f97 | 233 | help |
3aed8c43 NK |
234 | For most platforms, the arguments for the kernel's command line |
235 | are provided at run-time, during boot. However, there are cases | |
236 | where either no arguments are being provided or the provided | |
237 | arguments are insufficient or even invalid. | |
aef53f97 | 238 | |
3aed8c43 NK |
239 | When that occurs, it is possible to define a built-in command |
240 | line here and choose how the kernel should use it later on. | |
aef53f97 | 241 | |
3aed8c43 NK |
242 | choice |
243 | prompt "Built-in command line usage" if CMDLINE != "" | |
244 | default CMDLINE_FALLBACK | |
245 | help | |
246 | Choose how the kernel will handle the provided built-in command | |
247 | line. | |
aef53f97 | 248 | |
3aed8c43 NK |
249 | config CMDLINE_FALLBACK |
250 | bool "Use bootloader kernel arguments if available" | |
aef53f97 | 251 | help |
3aed8c43 NK |
252 | Use the built-in command line as fallback in case we get nothing |
253 | during boot. This is the default behaviour. | |
254 | ||
255 | config CMDLINE_EXTEND | |
256 | bool "Extend bootloader kernel arguments" | |
257 | help | |
258 | The command-line arguments provided during boot will be | |
259 | appended to the built-in command line. This is useful in | |
260 | cases where the provided arguments are insufficient and | |
261 | you don't want to or cannot modify them. | |
262 | ||
aef53f97 NK |
263 | |
264 | config CMDLINE_FORCE | |
3aed8c43 | 265 | bool "Always use the default kernel command string" |
aef53f97 | 266 | help |
3aed8c43 NK |
267 | Always use the built-in command line, even if we get one during |
268 | boot. This is useful in case you need to override the provided | |
269 | command line on systems where you don't have or want control | |
270 | over it. | |
aef53f97 | 271 | |
3aed8c43 | 272 | endchoice |
aef53f97 NK |
273 | |
274 | endmenu | |
275 | ||
fbe934d6 PD |
276 | menu "Bus support" |
277 | ||
278 | config PCI | |
279 | bool "PCI support" | |
280 | select PCI_MSI | |
281 | help | |
282 | This feature enables support for PCI bus system. If you say Y | |
283 | here, the kernel will include drivers and infrastructure code | |
284 | to support PCI bus devices. | |
285 | ||
286 | If you don't know what to do here, say Y. | |
287 | ||
288 | config PCI_DOMAINS | |
289 | def_bool PCI | |
290 | ||
291 | config PCI_DOMAINS_GENERIC | |
292 | def_bool PCI | |
293 | ||
294 | source "drivers/pci/Kconfig" | |
295 | ||
296 | endmenu | |
297 | ||
fbe934d6 PD |
298 | menu "Power management options" |
299 | ||
300 | source kernel/power/Kconfig | |
301 | ||
302 | endmenu |