select ARCH_HAS_FAST_MULTIPLIER
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_KCOV
- select ARCH_HAS_KERNEL_FPU_SUPPORT if CPU_HAS_FPU
+ select ARCH_HAS_KERNEL_FPU_SUPPORT if 64BIT && CPU_HAS_FPU
select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
select ARCH_HAS_PREEMPT_LAZY
- select ARCH_HAS_PTE_SPECIAL
+ select ARCH_HAS_PTE_SPECIAL if 64BIT
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SET_DIRECT_MAP
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_KEEP_MEMBLOCK
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
- select ARCH_SPARSEMEM_ENABLE
select ARCH_STACKWALK
select ARCH_SUPPORTS_ACPI
select ARCH_SUPPORTS_ATOMIC_RMW
- select ARCH_SUPPORTS_HUGETLBFS
+ select ARCH_SUPPORTS_HUGETLBFS if 64BIT
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_SUPPORTS_LTO_CLANG
select ARCH_SUPPORTS_LTO_CLANG_THIN
select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS
- select ARCH_SUPPORTS_NUMA_BALANCING
+ select ARCH_SUPPORTS_NUMA_BALANCING if NUMA
select ARCH_SUPPORTS_PER_VMA_LOCK
select ARCH_SUPPORTS_RT
select ARCH_SUPPORTS_SCHED_SMT if SMP
select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
- select ARCH_WANT_DEFAULT_BPF_JIT
+ select ARCH_WANT_DEFAULT_BPF_JIT if HAVE_EBPF_JIT
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
select ARCH_WANT_LD_ORPHAN_WARN
- select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
+ select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP if 64BIT
select ARCH_WANTS_NO_INSTR
select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE
select BUILDTIME_TABLE_SORT
select CPU_PM
select EDAC_SUPPORT
select EFI
+ select GENERIC_ATOMIC64 if 32BIT
select GENERIC_CLOCKEVENTS
select GENERIC_CMOS_UPDATE
select GENERIC_CPU_AUTOPROBE
select GENERIC_CPU_DEVICES
select GENERIC_CPU_VULNERABILITIES
select GENERIC_ENTRY
- select GENERIC_GETTIMEOFDAY
+ select GENERIC_GETTIMEOFDAY if 64BIT
select GENERIC_IOREMAP if !ARCH_IOREMAP
select GENERIC_IRQ_MATRIX_ALLOCATOR
select GENERIC_IRQ_MULTI_HANDLER
select GENERIC_PCI_IOMAP
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
- select GENERIC_TIME_VSYSCALL
+ select GENERIC_TIME_VSYSCALL if GENERIC_GETTIMEOFDAY
select GPIOLIB
select HAS_IOPORT
- select HAVE_ALIGNED_STRUCT_PAGE
+ select HAVE_ALIGNED_STRUCT_PAGE if 64BIT
select HAVE_ARCH_AUDITSYSCALL
- select HAVE_ARCH_BITREVERSE
+ select HAVE_ARCH_BITREVERSE if 64BIT
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_JUMP_LABEL_RELATIVE
- select HAVE_ARCH_KASAN
- select HAVE_ARCH_KFENCE
+ select HAVE_ARCH_KASAN if 64BIT
+ select HAVE_ARCH_KFENCE if 64BIT
select HAVE_ARCH_KGDB if PERF_EVENTS
select HAVE_ARCH_KSTACK_ERASE
select HAVE_ARCH_MMAP_RND_BITS if MMU
select HAVE_ARCH_SECCOMP
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
- select HAVE_ARCH_TRANSPARENT_HUGEPAGE
- select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD
+ select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
+ select HAVE_ARCH_USERFAULTFD_MINOR if 64BIT && USERFAULTFD
select HAVE_ASM_MODVERSIONS
select HAVE_CMPXCHG_DOUBLE
select HAVE_CMPXCHG_LOCAL
select HAVE_FTRACE_REGS_HAVING_PT_REGS
select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
select HAVE_DYNAMIC_FTRACE_WITH_REGS
- select HAVE_EBPF_JIT
+ select HAVE_EBPF_JIT if 64BIT
select HAVE_EFFICIENT_UNALIGNED_ACCESS if !ARCH_STRICT_ALIGN
select HAVE_EXIT_THREAD
select HAVE_GENERIC_TIF_BITS
select HAVE_LIVEPATCH
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NMI
- select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS && AS_HAS_THIN_ADD_SUB
+ select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS && AS_HAS_THIN_ADD_SUB && 64BIT
select HAVE_PCI
- select HAVE_PERF_EVENTS
+ select HAVE_PERF_EVENTS if 64BIT
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_POSIX_CPU_TIMERS_TASK_WORK
select SYSCTL_ARCH_UNALIGN_ALLOW
select SYSCTL_ARCH_UNALIGN_NO_WARN
select SYSCTL_EXCEPTION_TRACE
- select SWIOTLB
+ select SWIOTLB if 64BIT
select TRACE_IRQFLAGS_SUPPORT
select USE_PERCPU_NUMA_NODE_ID
select USER_STACKTRACE_SUPPORT
select VDSO_GETRANDOM
- select ZONE_DMA32
+ select ZONE_DMA32 if 64BIT
+
+menu "Kernel type and options"
+
+choice
+ prompt "Kernel type"
config 32BIT
- bool
+ bool "32-bit kernel"
+ help
+ Select this option if you want to build a 32-bit kernel.
config 64BIT
- def_bool y
+ bool "64-bit kernel"
+ help
+ Select this option if you want to build a 64-bit kernel.
+
+endchoice
+
+if 32BIT
+
+choice
+ prompt "32-bit kernel sub-type"
+
+config 32BIT_REDUCED
+ bool "32-bit kernel for LA32R"
+ help
+ Select this option if you want to build a 32-bit kernel for
+ LoongArch32 Reduced (LA32R).
+
+config 32BIT_STANDARD
+ bool "32-bit kernel for LA32S"
+ help
+ Select this option if you want to build a 32-bit kernel for
+ LoongArch32 Standard (LA32S).
+
+endchoice
+
+endif
config GENERIC_BUG
def_bool y
depends on RUST
def_bool $(rustc-option,-Cllvm-args=--loongarch-annotate-tablejump)
-menu "Kernel type and options"
-
source "kernel/Kconfig.hz"
choice
of page size and page table levels. The size of virtual memory
address space are determined by the page table layout.
+config 4KB_2LEVEL
+ bool "4KB with 2 levels"
+ select HAVE_PAGE_SIZE_4KB
+ select PGTABLE_2LEVEL
+ help
+ This option selects 4KB page size with 2 level page tables, which
+ support a maximum of 32 bits of application virtual memory.
+
config 4KB_3LEVEL
bool "4KB with 3 levels"
+ depends on 64BIT
select HAVE_PAGE_SIZE_4KB
select PGTABLE_3LEVEL
help
config 4KB_4LEVEL
bool "4KB with 4 levels"
+ depends on 64BIT
select HAVE_PAGE_SIZE_4KB
select PGTABLE_4LEVEL
help
config 16KB_3LEVEL
bool "16KB with 3 levels"
+ depends on 64BIT
select HAVE_PAGE_SIZE_16KB
select PGTABLE_3LEVEL
help
config 64KB_3LEVEL
bool "64KB with 3 levels"
+ depends on 64BIT
select HAVE_PAGE_SIZE_64KB
select PGTABLE_3LEVEL
help
config SMP
bool "Multi-Processing support"
+ depends on 64BIT
help
This enables support for systems with more than one CPU. If you have
a system with only one CPU, say N. If you have a system with more
config NUMA
bool "NUMA Support"
select SMP
+ depends on 64BIT
help
Say Y to compile the kernel with NUMA (Non-Uniform Memory Access)
support. This option improves performance on systems with more
config CPU_HAS_LSX
bool "Support for the Loongson SIMD Extension"
- depends on AS_HAS_LSX_EXTENSION
+ depends on AS_HAS_LSX_EXTENSION && 64BIT
help
Loongson SIMD Extension (LSX) introduces 128 bit wide vector registers
and a set of SIMD instructions to operate on them. When this option
config CPU_HAS_LASX
bool "Support for the Loongson Advanced SIMD Extension"
depends on CPU_HAS_LSX
- depends on AS_HAS_LASX_EXTENSION
+ depends on AS_HAS_LASX_EXTENSION && 64BIT
help
Loongson Advanced SIMD Extension (LASX) introduces 256 bit wide vector
registers and a set of SIMD instructions to operate on them. When this
config CPU_HAS_LBT
bool "Support for the Loongson Binary Translation Extension"
- depends on AS_HAS_LBT_EXTENSION
+ depends on AS_HAS_LBT_EXTENSION && 64BIT
help
Loongson Binary Translation (LBT) introduces 4 scratch registers (SCR0
to SCR3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop).
select HAVE_IMA_KEXEC if IMA
config ARCH_SUPPORTS_CRASH_DUMP
- def_bool y
+ def_bool 64BIT
config ARCH_DEFAULT_CRASH_DUMP
- def_bool y
+ def_bool 64BIT
config ARCH_SELECTS_CRASH_DUMP
- def_bool y
+ def_bool 64BIT
depends on CRASH_DUMP
select RELOCATABLE
config RELOCATABLE
bool "Relocatable kernel"
+ depends on 64BIT
select ARCH_HAS_RELR
help
This builds the kernel as a Position Independent Executable (PIE),
config PARAVIRT
bool "Enable paravirtualization code"
- depends on AS_HAS_LVZ_EXTENSION
+ depends on AS_HAS_LVZ_EXTENSION && 64BIT
select HAVE_PV_STEAL_CLOCK_GEN
help
This changes the kernel so it can modify itself when it is run
depends on !NUMA
config ARCH_SPARSEMEM_ENABLE
- def_bool y
+ def_bool 64BIT
select SPARSEMEM_VMEMMAP_ENABLE
help
Say Y to support efficient handling of sparse physical memory,
default y
config ARCH_MMAP_RND_BITS_MIN
- default 12
+ default 10 if 32BIT
+ default 12 if 64BIT
config ARCH_MMAP_RND_BITS_MAX
- default 18
+ default 15 if 32BIT
+ default 20 if 64BIT
config ARCH_SUPPORTS_UPROBES
def_bool y
projects / thirdparty / kernel / linux.git / commitdiff
