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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/arch/riscv/Kconfig
....@@ -1,6 +1,7 @@
1
+# SPDX-License-Identifier: GPL-2.0-only
12 #
23 # For a description of the syntax of this configuration file,
3
-# see Documentation/kbuild/kconfig-language.txt.
4
+# see Documentation/kbuild/kconfig-language.rst.
45 #
56 
67 config 64BIT
....@@ -11,60 +12,164 @@
1112 
1213 config RISCV
1314 	def_bool y
14
-	# even on 32-bit, physical (and DMA) addresses are > 32-bits
15
-	select PHYS_ADDR_T_64BIT
15
+	select ARCH_CLOCKSOURCE_INIT
16
+	select ARCH_SUPPORTS_ATOMIC_RMW
17
+	select ARCH_HAS_BINFMT_FLAT
18
+	select ARCH_HAS_DEBUG_VM_PGTABLE
19
+	select ARCH_HAS_DEBUG_VIRTUAL if MMU
20
+	select ARCH_HAS_DEBUG_WX
21
+	select ARCH_HAS_GCOV_PROFILE_ALL
22
+	select ARCH_HAS_GIGANTIC_PAGE
23
+	select ARCH_HAS_KCOV
24
+	select ARCH_HAS_MMIOWB
25
+	select ARCH_HAS_PTE_SPECIAL
26
+	select ARCH_HAS_SET_DIRECT_MAP
27
+	select ARCH_HAS_SET_MEMORY
28
+	select ARCH_HAS_STRICT_KERNEL_RWX if MMU
29
+	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
30
+	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
31
+	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
32
+	select ARCH_WANT_FRAME_POINTERS
33
+	select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
34
+	select CLONE_BACKWARDS
35
+	select CLINT_TIMER if !MMU
36
+	select COMMON_CLK
37
+	select EDAC_SUPPORT
38
+	select GENERIC_ARCH_TOPOLOGY
39
+	select GENERIC_ATOMIC64 if !64BIT
40
+	select GENERIC_CLOCKEVENTS
41
+	select GENERIC_EARLY_IOREMAP
42
+	select GENERIC_GETTIMEOFDAY if HAVE_GENERIC_VDSO
43
+	select GENERIC_IOREMAP
44
+	select GENERIC_IRQ_MULTI_HANDLER
45
+	select GENERIC_IRQ_SHOW
46
+	select GENERIC_PCI_IOMAP
47
+	select GENERIC_PTDUMP if MMU
48
+	select GENERIC_SCHED_CLOCK
49
+	select GENERIC_SMP_IDLE_THREAD
50
+	select GENERIC_STRNCPY_FROM_USER if MMU
51
+	select GENERIC_STRNLEN_USER if MMU
52
+	select GENERIC_TIME_VSYSCALL if MMU && 64BIT
53
+	select HANDLE_DOMAIN_IRQ
54
+	select HAVE_ARCH_AUDITSYSCALL
55
+	select HAVE_ARCH_JUMP_LABEL
56
+	select HAVE_ARCH_JUMP_LABEL_RELATIVE
57
+	select HAVE_ARCH_KASAN if MMU && 64BIT
58
+	select HAVE_ARCH_KGDB
59
+	select HAVE_ARCH_KGDB_QXFER_PKT
60
+	select HAVE_ARCH_MMAP_RND_BITS if MMU
61
+	select HAVE_ARCH_SECCOMP_FILTER
62
+	select HAVE_ARCH_TRACEHOOK
63
+	select HAVE_ASM_MODVERSIONS
64
+	select HAVE_CONTEXT_TRACKING
65
+	select HAVE_DEBUG_KMEMLEAK
66
+	select HAVE_DMA_CONTIGUOUS if MMU
67
+	select HAVE_EBPF_JIT if MMU
68
+	select HAVE_FUTEX_CMPXCHG if FUTEX
69
+	select HAVE_GCC_PLUGINS
70
+	select HAVE_GENERIC_VDSO if MMU && 64BIT
71
+	select HAVE_PCI
72
+	select HAVE_PERF_EVENTS
73
+	select HAVE_PERF_REGS
74
+	select HAVE_PERF_USER_STACK_DUMP
75
+	select HAVE_STACKPROTECTOR
76
+	select HAVE_SYSCALL_TRACEPOINTS
77
+	select IRQ_DOMAIN
78
+	select MODULES_USE_ELF_RELA if MODULES
79
+	select MODULE_SECTIONS if MODULES
1680 	select OF
1781 	select OF_EARLY_FLATTREE
1882 	select OF_IRQ
19
-	select ARCH_WANT_FRAME_POINTERS
20
-	select CLONE_BACKWARDS
21
-	select COMMON_CLK
22
-	select DMA_DIRECT_OPS
23
-	select GENERIC_CLOCKEVENTS
24
-	select GENERIC_CPU_DEVICES
25
-	select GENERIC_IRQ_SHOW
26
-	select GENERIC_PCI_IOMAP
27
-	select GENERIC_STRNCPY_FROM_USER
28
-	select GENERIC_STRNLEN_USER
29
-	select GENERIC_SMP_IDLE_THREAD
30
-	select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A
31
-	select HAVE_MEMBLOCK
32
-	select HAVE_MEMBLOCK_NODE_MAP
33
-	select HAVE_DMA_CONTIGUOUS
34
-	select HAVE_GENERIC_DMA_COHERENT
35
-	select HAVE_PERF_EVENTS
36
-	select IRQ_DOMAIN
37
-	select NO_BOOTMEM
38
-	select RISCV_ISA_A if SMP
83
+	select PCI_DOMAINS_GENERIC if PCI
84
+	select PCI_MSI if PCI
85
+	select RISCV_INTC
86
+	select RISCV_TIMER if RISCV_SBI
3987 	select SPARSE_IRQ
4088 	select SYSCTL_EXCEPTION_TRACE
41
-	select HAVE_ARCH_TRACEHOOK
42
-	select MODULES_USE_ELF_RELA if MODULES
4389 	select THREAD_INFO_IN_TASK
44
-	select RISCV_TIMER
45
-	select GENERIC_IRQ_MULTI_HANDLER
46
-	select ARCH_HAS_PTE_SPECIAL
90
+	select UACCESS_MEMCPY if !MMU
91
+
92
+config ARCH_MMAP_RND_BITS_MIN
93
+	default 18 if 64BIT
94
+	default 8
95
+
96
+# max bits determined by the following formula:
97
+#  VA_BITS - PAGE_SHIFT - 3
98
+config ARCH_MMAP_RND_BITS_MAX
99
+	default 24 if 64BIT # SV39 based
100
+	default 17
101
+
102
+# set if we run in machine mode, cleared if we run in supervisor mode
103
+config RISCV_M_MODE
104
+	bool
105
+	default !MMU
106
+
107
+# set if we are running in S-mode and can use SBI calls
108
+config RISCV_SBI
109
+	bool
110
+	depends on !RISCV_M_MODE
111
+	default y
47112 
48113 config MMU
49
-	def_bool y
114
+	bool "MMU-based Paged Memory Management Support"
115
+	default y
116
+	help
117
+	  Select if you want MMU-based virtualised addressing space
118
+	  support by paged memory management. If unsure, say 'Y'.
50119 
51120 config ZONE_DMA32
52121 	bool
53122 	default y if 64BIT
54123 
124
+config VA_BITS
125
+	int
126
+	default 32 if 32BIT
127
+	default 39 if 64BIT
128
+
129
+config PA_BITS
130
+	int
131
+	default 34 if 32BIT
132
+	default 56 if 64BIT
133
+
55134 config PAGE_OFFSET
56135 	hex
57
-	default 0xC0000000 if 32BIT && MAXPHYSMEM_2GB
136
+	default 0xC0000000 if 32BIT && MAXPHYSMEM_1GB
137
+	default 0x80000000 if 64BIT && !MMU
58138 	default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB
59139 	default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB
140
+
141
+config KASAN_SHADOW_OFFSET
142
+	hex
143
+	depends on KASAN_GENERIC
144
+	default 0xdfffffc800000000 if 64BIT
145
+	default 0xffffffff if 32BIT
146
+
147
+config ARCH_FLATMEM_ENABLE
148
+	def_bool y
149
+
150
+config ARCH_SPARSEMEM_ENABLE
151
+	def_bool y
152
+	depends on MMU
153
+	select SPARSEMEM_STATIC if 32BIT && SPARSEMEM
154
+	select SPARSEMEM_VMEMMAP_ENABLE if 64BIT
155
+
156
+config ARCH_SELECT_MEMORY_MODEL
157
+	def_bool ARCH_SPARSEMEM_ENABLE
158
+
159
+config ARCH_WANT_GENERAL_HUGETLB
160
+	def_bool y
161
+
162
+config ARCH_SUPPORTS_DEBUG_PAGEALLOC
163
+	def_bool y
164
+
165
+config SYS_SUPPORTS_HUGETLBFS
166
+	depends on MMU
167
+	def_bool y
60168 
61169 config STACKTRACE_SUPPORT
62170 	def_bool y
63171 
64172 config TRACE_IRQFLAGS_SUPPORT
65
-	def_bool y
66
-
67
-config RWSEM_GENERIC_SPINLOCK
68173 	def_bool y
69174 
70175 config GENERIC_BUG
....@@ -84,13 +189,18 @@
84189 config GENERIC_HWEIGHT
85190 	def_bool y
86191 
192
+config FIX_EARLYCON_MEM
193
+	def_bool MMU
194
+
87195 config PGTABLE_LEVELS
88196 	int
89197 	default 3 if 64BIT
90198 	default 2
91199 
92
-config HAVE_KPROBES
93
-	def_bool n
200
+config LOCKDEP_SUPPORT
201
+	def_bool y
202
+
203
+source "arch/riscv/Kconfig.socs"
94204 
95205 menu "Platform type"
96206 
....@@ -98,7 +208,7 @@
98208 	prompt "Base ISA"
99209 	default ARCH_RV64I
100210 	help
101
-	  This selects the base ISA that this kernel will traget and must match
211
+	  This selects the base ISA that this kernel will target and must match
102212 	  the target platform.
103213 
104214 config ARCH_RV32I
....@@ -108,16 +218,18 @@
108218 	select GENERIC_LIB_ASHRDI3
109219 	select GENERIC_LIB_LSHRDI3
110220 	select GENERIC_LIB_UCMPDI2
221
+	select MMU
111222 
112223 config ARCH_RV64I
113224 	bool "RV64I"
114225 	select 64BIT
115
-	select HAVE_FUNCTION_TRACER
116
-	select HAVE_FUNCTION_GRAPH_TRACER
226
+	select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && GCC_VERSION >= 50000
227
+	select HAVE_DYNAMIC_FTRACE if MMU
228
+	select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
117229 	select HAVE_FTRACE_MCOUNT_RECORD
118
-	select HAVE_DYNAMIC_FTRACE
119
-	select HAVE_DYNAMIC_FTRACE_WITH_REGS
120
-	select SWIOTLB
230
+	select HAVE_FUNCTION_GRAPH_TRACER
231
+	select HAVE_FUNCTION_TRACER
232
+	select SWIOTLB if MMU
121233 
122234 endchoice
123235 
....@@ -141,15 +253,18 @@
141253 
142254 choice
143255 	prompt "Maximum Physical Memory"
144
-	default MAXPHYSMEM_2GB if 32BIT
256
+	default MAXPHYSMEM_1GB if 32BIT
145257 	default MAXPHYSMEM_2GB if 64BIT && CMODEL_MEDLOW
146258 	default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY
147259 
260
+	config MAXPHYSMEM_1GB
261
+		depends on 32BIT
262
+		bool "1GiB"
148263 	config MAXPHYSMEM_2GB
264
+		depends on 64BIT && CMODEL_MEDLOW
149265 		bool "2GiB"
150266 	config MAXPHYSMEM_128GB
151267 		depends on 64BIT && CMODEL_MEDANY
152
-		select MODULE_SECTIONS if MODULES
153268 		bool "128GiB"
154269 endchoice
155270 
....@@ -173,6 +288,17 @@
173288 	depends on SMP
174289 	default "8"
175290 
291
+config HOTPLUG_CPU
292
+	bool "Support for hot-pluggable CPUs"
293
+	depends on SMP
294
+	select GENERIC_IRQ_MIGRATION
295
+	help
296
+
297
+	  Say Y here to experiment with turning CPUs off and on.  CPUs
298
+	  can be controlled through /sys/devices/system/cpu.
299
+
300
+	  Say N if you want to disable CPU hotplug.
301
+
176302 choice
177303 	prompt "CPU Tuning"
178304 	default TUNE_GENERIC
....@@ -192,9 +318,6 @@
192318 
193319 	   If you don't know what to do here, say Y.
194320 
195
-config RISCV_ISA_A
196
-	def_bool y
197
-
198321 menu "supported PMU type"
199322 	depends on PERF_EVENTS
200323 
....@@ -208,38 +331,108 @@
208331 
209332 endmenu
210333 
211
-endmenu
212
-
213
-menu "Kernel type"
214
-
215
-source "kernel/Kconfig.hz"
216
-
217
-endmenu
218
-
219
-menu "Bus support"
220
-
221
-config PCI
222
-	bool "PCI support"
223
-	select PCI_MSI
334
+config FPU
335
+	bool "FPU support"
336
+	default y
224337 	help
225
-	  This feature enables support for PCI bus system. If you say Y
226
-	  here, the kernel will include drivers and infrastructure code
227
-	  to support PCI bus devices.
338
+	  Say N here if you want to disable all floating-point related procedure
339
+	  in the kernel.
228340 
229341 	  If you don't know what to do here, say Y.
230342 
231
-config PCI_DOMAINS
232
-	def_bool PCI
343
+endmenu
233344 
234
-config PCI_DOMAINS_GENERIC
235
-	def_bool PCI
345
+menu "Kernel features"
236346 
237
-source "drivers/pci/Kconfig"
347
+source "kernel/Kconfig.hz"
348
+
349
+config RISCV_SBI_V01
350
+	bool "SBI v0.1 support"
351
+	default y
352
+	depends on RISCV_SBI
353
+	help
354
+	  This config allows kernel to use SBI v0.1 APIs. This will be
355
+	  deprecated in future once legacy M-mode software are no longer in use.
356
+endmenu
357
+
358
+menu "Boot options"
359
+
360
+config CMDLINE
361
+	string "Built-in kernel command line"
362
+	help
363
+	  For most platforms, the arguments for the kernel's command line
364
+	  are provided at run-time, during boot. However, there are cases
365
+	  where either no arguments are being provided or the provided
366
+	  arguments are insufficient or even invalid.
367
+
368
+	  When that occurs, it is possible to define a built-in command
369
+	  line here and choose how the kernel should use it later on.
370
+
371
+choice
372
+	prompt "Built-in command line usage" if CMDLINE != ""
373
+	default CMDLINE_FALLBACK
374
+	help
375
+	  Choose how the kernel will handle the provided built-in command
376
+	  line.
377
+
378
+config CMDLINE_FALLBACK
379
+	bool "Use bootloader kernel arguments if available"
380
+	help
381
+	  Use the built-in command line as fallback in case we get nothing
382
+	  during boot. This is the default behaviour.
383
+
384
+config CMDLINE_EXTEND
385
+	bool "Extend bootloader kernel arguments"
386
+	help
387
+	  The command-line arguments provided during boot will be
388
+	  appended to the built-in command line. This is useful in
389
+	  cases where the provided arguments are insufficient and
390
+	  you don't want to or cannot modify them.
391
+
392
+
393
+config CMDLINE_FORCE
394
+	bool "Always use the default kernel command string"
395
+	help
396
+	  Always use the built-in command line, even if we get one during
397
+	  boot. This is useful in case you need to override the provided
398
+	  command line on systems where you don't have or want control
399
+	  over it.
400
+
401
+endchoice
402
+
403
+config EFI_STUB
404
+	bool
405
+
406
+config EFI
407
+	bool "UEFI runtime support"
408
+	depends on OF
409
+	select LIBFDT
410
+	select UCS2_STRING
411
+	select EFI_PARAMS_FROM_FDT
412
+	select EFI_STUB
413
+	select EFI_GENERIC_STUB
414
+	select EFI_RUNTIME_WRAPPERS
415
+	select RISCV_ISA_C
416
+	depends on MMU
417
+	default y
418
+	help
419
+	  This option provides support for runtime services provided
420
+	  by UEFI firmware (such as non-volatile variables, realtime
421
+	  clock, and platform reset). A UEFI stub is also provided to
422
+	  allow the kernel to be booted as an EFI application. This
423
+	  is only useful on systems that have UEFI firmware.
238424 
239425 endmenu
426
+
427
+config BUILTIN_DTB
428
+	def_bool n
429
+	depends on RISCV_M_MODE
430
+	depends on OF
240431 
241432 menu "Power management options"
242433 
243
-source kernel/power/Kconfig
434
+source "kernel/power/Kconfig"
244435 
245436 endmenu
437
+
438
+source "drivers/firmware/Kconfig"