Kconfig - OpenGrok cross reference for /linux-6.15/arch/riscv/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
4 # see Documentation/kbuild/kconfig-language.rst.
70 	# LLD >= 14: https://github.com/llvm/llvm-project/issues/50505
228 	# -Zsanitizer=shadow-call-stack flag.
238 	depends on $(cc-option,-fpatchable-function-entry=8)
241 	def_bool $(cc-option,-fsanitize=shadow-call-stack)
242 …# https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a484e843e6eeb51f0cb7b8819e50da6d2444…
243 	depends on $(ld-option,--no-relax-gp)
247 	# https://github.com/llvm/llvm-project/commit/6611d58f5bbcbec77262d392e2923e1d680f6985
250 # https://github.com/llvm/llvm-project/commit/bbc0f99f3bc96f1db16f649fc21dd18e5b0918f6
254 	# https://github.com/llvm/llvm-project/commit/1df5ea29b43690b6622db2cad7b745607ca4de6a
256 	# https://github.com/llvm/llvm-project/commit/7ffabb61a5569444b5ac9322e22e5471cc5e4a77
267 #  VA_BITS - PAGE_SHIFT - 3
281 	  Select this option if you want to run the kernel in M-mode,
284 # set if we are running in S-mode and can use SBI calls
291 	bool "MMU-based Paged Memory Management Support"
294 	  Select if you want MMU-based virtualised addressing space
365 	  This enables function pointer support for non-standard noncoherent
369 	def_bool $(as-instr,.insn r 51$(comma) 0$(comma) 0$(comma) t0$(comma) t0$(comma) zero)
372 	# https://github.com/llvm/llvm-project/commit/9e8ed3403c191ab9c4903e8eeb8f732ff8a43cb4
374 	depends on $(as-instr, .option arch$(comma) +m)
382 	bool "Allow configurations that result in non-portable kernels"
384 	  RISC-V kernel binaries are compatible between all known systems
397 	prompt "Base ISA"
400 	  This selects the base ISA that this kernel will target and must match
439 	bool "Symmetric Multi-Processing"
452 	bool "Multi-core scheduler support"
455 	  Multi-core scheduler support improves the CPU scheduler's decision
456 	  making when dealing with multi-core CPU chips at a cost of slightly
460 	int "Maximum number of CPUs (2-512)"
469 	bool "Support for hot-pluggable CPUs"
500 	  Enable NUMA (Non-Uniform Memory Access) support.
515 	prompt "RISC-V spinlock type"
532 	  without one of those extensions.
566 	  Adds "C" to the ISA subsets that the toolchain is allowed to emit
590 	  Enable support for the Svnapot ISA-extension when it is detected
594 	  of contiguous virtual-to-physical translations for a naturally
595 	  aligned power-of-2 (NAPOT) granularity larger than the base 4KB page
604 	bool "Svpbmt extension support for supervisor mode page-based memory types"
609 	   Add support for the Svpbmt ISA-extension (Supervisor-mode:
610 	   page-based memory types) in the kernel when it is detected at boot.
616 	   The Svpbmt extension is only available on 64-bit cpus.
623 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64imv)
624 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32imv)
661 	bool "Run kernel-mode Vector with kernel preemption"
666 	  Usually, in-kernel SIMD routines are run with preemption disabled.
672 	  consumption due to the allocation of per-task's kernel Vector context.
680 	  which allow a hart to enter a low-power state or to trap to the
688 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zabha)
689 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zabha)
698 	  Enable the use of the Zabha ISA-extension to implement kernel
706 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zacas)
707 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zacas)
716 	  Enable the use of the Zacas ISA-extension to implement kernel atomic
724 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zbb)
725 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zbb)
730 # extensions, including Zvk*, Zvbb, and Zvbc.  LLVM added all of these at once.
733 	def_bool $(as-instr, .option arch$(comma) +v$(comma) +zvkb)
739 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zba)
740 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zba)
766 	   of bit-specific operations (count bit population, sign extending,
774 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zbc)
775 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zbc)
780 	bool "Zbc extension support for carry-less multiplication instructions"
787 	   extension (carry-less multiplication) and enable its usage.
797 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zbkb)
798 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zbkb)
817 	bool "Zicbom extension support for non-coherent DMA operation"
829 	   non-coherent DMA support on devices that need it.
847 …# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=aed44286efa8ae8717a77d94b51ac3614e2ca6…
851 	  Binutils-2.38 and GCC-12.1.0 bumped the default ISA spec to the newer
853 	  the Zicsr and Zifencei extensions. This requires explicitly specifying
857 	  newer ISA spec to version 2.2, relax the check to binutils >= 2.36.
864 	# https://github.com/llvm/llvm-project/commit/22e199e6afb1263c943c0c0d4498694e15bf8a16
869 	  -march. This option causes an older ISA spec compatible with these older
871 	  as passing zicsr and zifencei to -march.
893 	int "Kernel stack size (in power-of-two numbers of page size)" if VMAP_STACK && EXPERT
1025 	  deprecated in future once legacy M-mode software are no longer in use.
1036 	  scheme. It should be only enabled for M-mode Linux or platforms relying
1077 	bool "Kernel support for 32-bit U-mode"
1081 	  This option enables support for a 32-bit U-mode running under a 64-bit
1082 	  kernel at S-mode. riscv32-specific components such as system calls,
1086 	  If you want to execute 32-bit userspace applications, say Y.
1133           random u64 value in /chosen/kaslr-seed at kernel entry.
1147 	string "Built-in kernel command line"
1150 	  are provided at run-time, during boot. However, there are cases
1154 	  When that occurs, it is possible to define a built-in command
1158 	prompt "Built-in command line usage"
1162 	  Choose how the kernel will handle the provided built-in command
1168 	  Use the built-in command line as fallback in case we get nothing
1174 	  The command-line arguments provided during boot will be
1175 	  appended to the built-in command line. This is useful in
1182 	  Always use the built-in command line, even if we get one during
1207 	  by UEFI firmware (such as non-volatile variables, realtime
1221 	  continue to boot on existing non-UEFI platforms.
1224 …def_bool $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-…
1242 	  explicitly specified to run early relocations of read-write data
1246 	bool "Kernel Execute-In-Place from ROM"
1253 	  Execute-In-Place allows the kernel to run from non-volatile storage
1256 	  to RAM.  Read-write sections, such as the data section and stack,
1284 	bool "Permit falling back to parsing riscv,isa for extension support by default"
1287 	  Parsing the "riscv,isa" devicetree property has been deprecated and
1290 	  "riscv,isa" property if the replacements are not found.
1296 	  Please see the dt-binding, located at
1297 	  Documentation/devicetree/bindings/riscv/extensions.yaml for details
1298 	  on the replacement properties, "riscv,isa-base" and
1299 	  "riscv,isa-extensions".
1302 	bool "Built-in device tree"
1312 	string "Built-in device tree source"