Kconfig - OpenGrok cross reference for /linux-6.8/arch/riscv/Kconfig

1 # SPDX-License-Identifier: GPL-2.0-only
4 # see Documentation/kbuild/kconfig-language.rst.
177 	# https://github.com/llvm/llvm-project/commit/6ab8927931851bb42b2c93a00801dc499d7d9b1e
184 	depends on $(cc-option,-fpatchable-function-entry=8)
187 	def_bool $(cc-option,-fsanitize=shadow-call-stack)
188 …# https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a484e843e6eeb51f0cb7b8819e50da6d2444…
189 	depends on $(ld-option,--no-relax-gp)
193 	# https://github.com/llvm/llvm-project/commit/6611d58f5bbcbec77262d392e2923e1d680f6985
196 # https://github.com/llvm/llvm-project/commit/bbc0f99f3bc96f1db16f649fc21dd18e5b0918f6
200 	# https://github.com/llvm/llvm-project/commit/1df5ea29b43690b6622db2cad7b745607ca4de6a
202 	# https://github.com/llvm/llvm-project/commit/7ffabb61a5569444b5ac9322e22e5471cc5e4a77
213 #  VA_BITS - PAGE_SHIFT - 3
226 # set if we are running in S-mode and can use SBI calls
233 	bool "MMU-based Paged Memory Management Support"
236 	  Select if you want MMU-based virtualised addressing space
308 	  This enables function pointer support for non-standard noncoherent
312 	def_bool $(as-instr,.insn r 51$(comma) 0$(comma) 0$(comma) t0$(comma) t0$(comma) zero)
317 	depends on $(as-instr, .option arch$(comma) +m)
325 	bool "Allow configurations that result in non-portable kernels"
327 	  RISC-V kernel binaries are compatible between all known systems
340 	prompt "Base ISA"
343 	  This selects the base ISA that this kernel will target and must match
382 	bool "Symmetric Multi-Processing"
395 	bool "Multi-core scheduler support"
398 	  Multi-core scheduler support improves the CPU scheduler's decision
399 	  making when dealing with multi-core CPU chips at a cost of slightly
403 	int "Maximum number of CPUs (2-512)"
412 	bool "Support for hot-pluggable CPUs"
443 	  Enable NUMA (Non-Uniform Memory Access) support.
476 	  Adds "C" to the ISA subsets that the toolchain is allowed to emit
488 	  Allow kernel to detect the Svnapot ISA-extension dynamically at boot
492 	  of contiguous virtual-to-physical translations for a naturally
493 	  aligned power-of-2 (NAPOT) granularity larger than the base 4KB page
502 	bool "Svpbmt extension support for supervisor mode page-based memory types"
508 	   ISA-extension (Supervisor-mode: page-based memory types) and
515 	   The Svpbmt extension is only available on 64-bit cpus.
522 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
523 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
559 	bool "Run kernel-mode Vector with kernel preemption"
564 	  Usually, in-kernel SIMD routines are run with preemption disabled.
570 	  consumption due to the allocation of per-task's kernel Vector context.
575 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zbb)
576 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zbb)
591 	   of bit-specific operations (count bit population, sign extending,
597 	bool "Zicbom extension support for non-coherent DMA operation"
609 	   non-coherent DMA support on devices that need it.
629 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64ima_zihintpause)
630 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32ima_zihintpause)
635 …# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=aed44286efa8ae8717a77d94b51ac3614e2ca6…
639 	  Binutils-2.38 and GCC-12.1.0 bumped the default ISA spec to the newer
641 	  the Zicsr and Zifencei extensions. This requires explicitly specifying
645 	  newer ISA spec to version 2.2, relax the check to binutils >= 2.36.
652 	# https://github.com/llvm/llvm-project/commit/22e199e6afb1263c943c0c0d4498694e15bf8a16
657 	  -march. This option causes an older ISA spec compatible with these older
659 	  as passing zicsr and zifencei to -march.
665 	  Say N here if you want to disable all floating-point related procedure
680 	int "Kernel stack size (in power-of-two numbers of page size)" if VMAP_STACK && EXPERT
723 	  deprecated in future once legacy M-mode software are no longer in use.
734 	  scheme. It should be only enabled for M-mode Linux or platforms relying
772 	bool "Kernel support for 32-bit U-mode"
776 	  This option enables support for a 32-bit U-mode running under a 64-bit
777 	  kernel at S-mode. riscv32-specific components such as system calls,
781 	  If you want to execute 32-bit userspace applications, say Y.
826           random u64 value in /chosen/kaslr-seed at kernel entry.
840 	string "Built-in kernel command line"
843 	  are provided at run-time, during boot. However, there are cases
847 	  When that occurs, it is possible to define a built-in command
851 	prompt "Built-in command line usage" if CMDLINE != ""
854 	  Choose how the kernel will handle the provided built-in command
860 	  Use the built-in command line as fallback in case we get nothing
866 	  The command-line arguments provided during boot will be
867 	  appended to the built-in command line. This is useful in
874 	  Always use the built-in command line, even if we get one during
899 	  by UEFI firmware (such as non-volatile variables, realtime
905 …def_bool $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=tp -mstack-protector-…
923 	  explicitly specified to run early relocations of read-write data
927 	bool "Kernel Execute-In-Place from ROM"
934 	  Execute-In-Place allows the kernel to run from non-volatile storage
937 	  to RAM.  Read-write sections, such as the data section and stack,
965 	bool "Permit falling back to parsing riscv,isa for extension support by default"
968 	  Parsing the "riscv,isa" devicetree property has been deprecated and
971 	  "riscv,isa" property if the replacements are not found.
977 	  Please see the dt-binding, located at
978 	  Documentation/devicetree/bindings/riscv/extensions.yaml for details
979 	  on the replacement properties, "riscv,isa-base" and
980 	  "riscv,isa-extensions".
983 	bool "Built-in device tree"