select ARCH_HAS_SET_MEMORY if MMU
select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
select ARCH_HAS_STRICT_MODULE_RWX if MMU && !XIP_KERNEL
+ select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAS_VDSO_DATA
select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
select ARCH_STACKWALK
select ARCH_SUPPORTS_ATOMIC_RMW
+ select ARCH_SUPPORTS_CFI_CLANG
select ARCH_SUPPORTS_DEBUG_PAGEALLOC if MMU
select ARCH_SUPPORTS_HUGETLBFS if MMU
select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU
select ARCH_SUPPORTS_PER_VMA_LOCK if MMU
select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
+ select ARCH_USES_CFI_TRAPS if CFI_CLANG
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
select ARCH_WANT_FRAME_POINTERS
select ARCH_WANT_GENERAL_HUGETLB if !RISCV_ISA_SVNAPOT
select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
select ARCH_WANT_LD_ORPHAN_WARN if !XIP_KERNEL
- select ARCH_WANT_OPTIMIZE_VMEMMAP
+ select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE
select BINFMT_FLAT_NO_DATA_START_OFFSET if !MMU
select BUILDTIME_TABLE_SORT if MMU
select COMMON_CLK
select CPU_PM if CPU_IDLE || HIBERNATION
select EDAC_SUPPORT
+ select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE)
select GENERIC_ARCH_TOPOLOGY
select GENERIC_ATOMIC64 if !64BIT
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_POSIX_CPU_TIMERS_TASK_WORK
+ select HAVE_PREEMPT_DYNAMIC_KEY if !XIP_KERNEL
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RETHOOK if !XIP_KERNEL
select HAVE_RSEQ
select ARCH_HAS_SETUP_DMA_OPS
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+ select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB
select DMA_DIRECT_REMAP
+config RISCV_NONSTANDARD_CACHE_OPS
+ bool
+ depends on RISCV_DMA_NONCOHERENT
+ help
+ This enables function pointer support for non-standard noncoherent
+ systems to handle cache management.
+
config AS_HAS_INSN
def_bool $(as-instr,.insn r 51$(comma) 0$(comma) 0$(comma) t0$(comma) t0$(comma) zero)
config TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI
def_bool y
# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=aed44286efa8ae8717a77d94b51ac3614e2ca6dc
- depends on AS_IS_GNU && AS_VERSION >= 23800
- help
- Newer binutils versions default to ISA spec version 20191213 which
- moves some instructions from the I extension to the Zicsr and Zifencei
- extensions.
+ # https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=98416dbb0a62579d4a7a4a76bab51b5b52fec2cd
+ depends on AS_IS_GNU && AS_VERSION >= 23600
+ help
+ Binutils-2.38 and GCC-12.1.0 bumped the default ISA spec to the newer
+ 20191213 version, which moves some instructions from the I extension to
+ the Zicsr and Zifencei extensions. This requires explicitly specifying
+ Zicsr and Zifencei when binutils >= 2.38 or GCC >= 12.1.0. Zicsr
+ and Zifencei are supported in binutils from version 2.36 onwards.
+ To make life easier, and avoid forcing toolchains that default to a
+ newer ISA spec to version 2.2, relax the check to binutils >= 2.36.
+ For clang < 17 or GCC < 11.3.0, for which this is not possible or need
+ special treatment, this is dealt with in TOOLCHAIN_NEEDS_OLD_ISA_SPEC.
config TOOLCHAIN_NEEDS_OLD_ISA_SPEC
def_bool y
depends on TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI
# https://github.com/llvm/llvm-project/commit/22e199e6afb1263c943c0c0d4498694e15bf8a16
- depends on CC_IS_CLANG && CLANG_VERSION < 170000
+ # https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=d29f5d6ab513c52fd872f532c492e35ae9fd6671
+ depends on (CC_IS_CLANG && CLANG_VERSION < 170000) || (CC_IS_GCC && GCC_VERSION < 110300)
help
- Certain versions of clang do not support zicsr and zifencei via -march
- but newer versions of binutils require it for the reasons noted in the
- help text of CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI. This
- option causes an older ISA spec compatible with these older versions
- of clang to be passed to GAS, which has the same result as passing zicsr
- and zifencei to -march.
+ Certain versions of clang and GCC do not support zicsr and zifencei via
+ -march. This option causes an older ISA spec compatible with these older
+ versions of clang and GCC to be passed to GAS, which has the same result
+ as passing zicsr and zifencei to -march.
config FPU
bool "FPU support"
If unsure what to do here, say N.
-config KEXEC
- bool "Kexec system call"
- depends on MMU
+config ARCH_SUPPORTS_KEXEC
+ def_bool MMU
+
+config ARCH_SELECTS_KEXEC
+ def_bool y
+ depends on KEXEC
select HOTPLUG_CPU if SMP
- select KEXEC_CORE
- help
- kexec is a system call that implements the ability to shutdown your
- current kernel, and to start another kernel. It is like a reboot
- but it is independent of the system firmware. And like a reboot
- you can start any kernel with it, not just Linux.
- The name comes from the similarity to the exec system call.
+config ARCH_SUPPORTS_KEXEC_FILE
+ def_bool 64BIT && MMU
-config KEXEC_FILE
- bool "kexec file based systmem call"
- depends on 64BIT && MMU
+config ARCH_SELECTS_KEXEC_FILE
+ def_bool y
+ depends on KEXEC_FILE
select HAVE_IMA_KEXEC if IMA
- select KEXEC_CORE
select KEXEC_ELF
- help
- This is new version of kexec system call. This system call is
- file based and takes file descriptors as system call argument
- for kernel and initramfs as opposed to list of segments as
- accepted by previous system call.
-
- If you don't know what to do here, say Y.
-config ARCH_HAS_KEXEC_PURGATORY
+config ARCH_SUPPORTS_KEXEC_PURGATORY
def_bool KEXEC_FILE
depends on CRYPTO=y
depends on CRYPTO_SHA256=y
-config CRASH_DUMP
- bool "Build kdump crash kernel"
- help
- Generate crash dump after being started by kexec. This should
- be normally only set in special crash dump kernels which are
- loaded in the main kernel with kexec-tools into a specially
- reserved region and then later executed after a crash by
- kdump/kexec.
-
- For more details see Documentation/admin-guide/kdump/kdump.rst
+config ARCH_SUPPORTS_CRASH_DUMP
+ def_bool y
config COMPAT
bool "Kernel support for 32-bit U-mode"
be linked for and stored to. This address is dependent on your
own flash usage.
+config RISCV_ISA_FALLBACK
+ bool "Permit falling back to parsing riscv,isa for extension support by default"
+ default y
+ help
+ Parsing the "riscv,isa" devicetree property has been deprecated and
+ replaced by a list of explicitly defined strings. For compatibility
+ with existing platforms, the kernel will fall back to parsing the
+ "riscv,isa" property if the replacements are not found.
+
+ Selecting N here will result in a kernel that does not use the
+ fallback, unless the commandline "riscv_isa_fallback" parameter is
+ present.
+
+ Please see the dt-binding, located at
+ Documentation/devicetree/bindings/riscv/extensions.yaml for details
+ on the replacement properties, "riscv,isa-base" and
+ "riscv,isa-extensions".
+
endmenu # "Boot options"
config BUILTIN_DTB
projects / platform / kernel / linux-rpi.git / blobdiff