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Diffstat (limited to 'arch/loongarch/Kconfig')
| -rw-r--r-- | arch/loongarch/Kconfig | 678 |
1 files changed, 678 insertions, 0 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig new file mode 100644 index 0000000000..e14396a2dd --- /dev/null +++ b/arch/loongarch/Kconfig @@ -0,0 +1,678 @@ +# SPDX-License-Identifier: GPL-2.0 +config LOONGARCH + bool + default y + select ACPI + select ACPI_GENERIC_GSI if ACPI + select ACPI_MCFG if ACPI + select ACPI_PPTT if ACPI + select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI + select ARCH_BINFMT_ELF_STATE + select ARCH_DISABLE_KASAN_INLINE + select ARCH_ENABLE_MEMORY_HOTPLUG + select ARCH_ENABLE_MEMORY_HOTREMOVE + select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI + select ARCH_HAS_CPU_FINALIZE_INIT + select ARCH_HAS_FORTIFY_SOURCE + select ARCH_HAS_KCOV + select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS + select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE + select ARCH_HAS_PTE_SPECIAL + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST + select ARCH_INLINE_READ_LOCK if !PREEMPTION + select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION + select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION + select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION + select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION + select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION + select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION + select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION + select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION + select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION + select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION + 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_LTO_CLANG + select ARCH_SUPPORTS_LTO_CLANG_THIN + select ARCH_SUPPORTS_NUMA_BALANCING + select ARCH_USE_BUILTIN_BSWAP + select ARCH_USE_CMPXCHG_LOCKREF + select ARCH_USE_QUEUED_RWLOCKS + select ARCH_USE_QUEUED_SPINLOCKS + select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT + select ARCH_WANT_LD_ORPHAN_WARN + select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP + select ARCH_WANTS_NO_INSTR + select BUILDTIME_TABLE_SORT + select COMMON_CLK + select CPU_PM + select EFI + select GENERIC_CLOCKEVENTS + select GENERIC_CMOS_UPDATE + select GENERIC_CPU_AUTOPROBE + select GENERIC_ENTRY + select GENERIC_GETTIMEOFDAY + select GENERIC_IOREMAP if !ARCH_IOREMAP + select GENERIC_IRQ_MULTI_HANDLER + select GENERIC_IRQ_PROBE + select GENERIC_IRQ_SHOW + select GENERIC_LIB_ASHLDI3 + select GENERIC_LIB_ASHRDI3 + select GENERIC_LIB_CMPDI2 + select GENERIC_LIB_LSHRDI3 + select GENERIC_LIB_UCMPDI2 + select GENERIC_LIB_DEVMEM_IS_ALLOWED + select GENERIC_PCI_IOMAP + select GENERIC_SCHED_CLOCK + select GENERIC_SMP_IDLE_THREAD + select GENERIC_TIME_VSYSCALL + select GENERIC_VDSO_TIME_NS + select GPIOLIB + select HAS_IOPORT + select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_JUMP_LABEL + select HAVE_ARCH_JUMP_LABEL_RELATIVE + select HAVE_ARCH_KASAN + select HAVE_ARCH_KFENCE + select HAVE_ARCH_KGDB if PERF_EVENTS + select HAVE_ARCH_MMAP_RND_BITS if MMU + select HAVE_ARCH_SECCOMP_FILTER + select HAVE_ARCH_TRACEHOOK + select HAVE_ARCH_TRANSPARENT_HUGEPAGE + select HAVE_ASM_MODVERSIONS + select HAVE_CONTEXT_TRACKING_USER + select HAVE_C_RECORDMCOUNT + select HAVE_DEBUG_KMEMLEAK + select HAVE_DEBUG_STACKOVERFLOW + select HAVE_DMA_CONTIGUOUS + select HAVE_DYNAMIC_FTRACE + select HAVE_DYNAMIC_FTRACE_WITH_ARGS + select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS + select HAVE_DYNAMIC_FTRACE_WITH_REGS + select HAVE_EBPF_JIT + select HAVE_EFFICIENT_UNALIGNED_ACCESS if !ARCH_STRICT_ALIGN + select HAVE_EXIT_THREAD + select HAVE_FAST_GUP + select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_FUNCTION_ARG_ACCESS_API + select HAVE_FUNCTION_ERROR_INJECTION + select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FUNCTION_TRACER + select HAVE_GCC_PLUGINS + select HAVE_GENERIC_VDSO + select HAVE_HW_BREAKPOINT if PERF_EVENTS + select HAVE_IOREMAP_PROT + select HAVE_IRQ_EXIT_ON_IRQ_STACK + select HAVE_IRQ_TIME_ACCOUNTING + select HAVE_KPROBES + select HAVE_KPROBES_ON_FTRACE + select HAVE_KRETPROBES + select HAVE_MOD_ARCH_SPECIFIC + select HAVE_NMI + select HAVE_PCI + select HAVE_PERF_EVENTS + select HAVE_PERF_REGS + select HAVE_PERF_USER_STACK_DUMP + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RETHOOK + select HAVE_RSEQ + select HAVE_SAMPLE_FTRACE_DIRECT + select HAVE_SAMPLE_FTRACE_DIRECT_MULTI + select HAVE_SETUP_PER_CPU_AREA if NUMA + select HAVE_STACKPROTECTOR + select HAVE_SYSCALL_TRACEPOINTS + select HAVE_TIF_NOHZ + select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP + select IRQ_FORCED_THREADING + select IRQ_LOONGARCH_CPU + select LOCK_MM_AND_FIND_VMA + select MMU_GATHER_MERGE_VMAS if MMU + select MODULES_USE_ELF_RELA if MODULES + select NEED_PER_CPU_EMBED_FIRST_CHUNK + select NEED_PER_CPU_PAGE_FIRST_CHUNK + select OF + select OF_EARLY_FLATTREE + select PCI + select PCI_DOMAINS_GENERIC + select PCI_ECAM if ACPI + select PCI_LOONGSON + select PCI_MSI_ARCH_FALLBACKS + select PCI_QUIRKS + select PERF_USE_VMALLOC + select RTC_LIB + select SMP + select SPARSE_IRQ + select SYSCTL_ARCH_UNALIGN_ALLOW + select SYSCTL_ARCH_UNALIGN_NO_WARN + select SYSCTL_EXCEPTION_TRACE + select SWIOTLB + select TRACE_IRQFLAGS_SUPPORT + select USE_PERCPU_NUMA_NODE_ID + select USER_STACKTRACE_SUPPORT + select ZONE_DMA32 + +config 32BIT + bool + +config 64BIT + def_bool y + +config GENERIC_BUG + def_bool y + depends on BUG + +config GENERIC_BUG_RELATIVE_POINTERS + def_bool y + depends on GENERIC_BUG + +config GENERIC_CALIBRATE_DELAY + def_bool y + +config GENERIC_CSUM + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config L1_CACHE_SHIFT + int + default "6" + +config LOCKDEP_SUPPORT + bool + default y + +config STACKTRACE_SUPPORT + bool + default y + +# MACH_LOONGSON32 and MACH_LOONGSON64 are deliberately carried over from the +# MIPS Loongson code, to preserve Loongson-specific code paths in drivers that +# are shared between architectures, and specifically expecting the symbols. +config MACH_LOONGSON32 + def_bool 32BIT + +config MACH_LOONGSON64 + def_bool 64BIT + +config FIX_EARLYCON_MEM + def_bool y + +config PAGE_SIZE_4KB + bool + +config PAGE_SIZE_16KB + bool + +config PAGE_SIZE_64KB + bool + +config PGTABLE_2LEVEL + bool + +config PGTABLE_3LEVEL + bool + +config PGTABLE_4LEVEL + bool + +config PGTABLE_LEVELS + int + default 2 if PGTABLE_2LEVEL + default 3 if PGTABLE_3LEVEL + default 4 if PGTABLE_4LEVEL + +config SCHED_OMIT_FRAME_POINTER + bool + default y + +config AS_HAS_EXPLICIT_RELOCS + def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x)) + +config AS_HAS_FCSR_CLASS + def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0) + +config AS_HAS_LSX_EXTENSION + def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0) + +config AS_HAS_LASX_EXTENSION + def_bool $(as-instr,xvld \$xr0$(comma)\$a0$(comma)0) + +config AS_HAS_LBT_EXTENSION + def_bool $(as-instr,movscr2gr \$a0$(comma)\$scr0) + +menu "Kernel type and options" + +source "kernel/Kconfig.hz" + +choice + prompt "Page Table Layout" + default 16KB_2LEVEL if 32BIT + default 16KB_3LEVEL if 64BIT + help + Allows choosing the page table layout, which is a combination + of page size and page table levels. The size of virtual memory + address space are determined by the page table layout. + +config 4KB_3LEVEL + bool "4KB with 3 levels" + select PAGE_SIZE_4KB + select PGTABLE_3LEVEL + help + This option selects 4KB page size with 3 level page tables, which + support a maximum of 39 bits of application virtual memory. + +config 4KB_4LEVEL + bool "4KB with 4 levels" + select PAGE_SIZE_4KB + select PGTABLE_4LEVEL + help + This option selects 4KB page size with 4 level page tables, which + support a maximum of 48 bits of application virtual memory. + +config 16KB_2LEVEL + bool "16KB with 2 levels" + select PAGE_SIZE_16KB + select PGTABLE_2LEVEL + help + This option selects 16KB page size with 2 level page tables, which + support a maximum of 36 bits of application virtual memory. + +config 16KB_3LEVEL + bool "16KB with 3 levels" + select PAGE_SIZE_16KB + select PGTABLE_3LEVEL + help + This option selects 16KB page size with 3 level page tables, which + support a maximum of 47 bits of application virtual memory. + +config 64KB_2LEVEL + bool "64KB with 2 levels" + select PAGE_SIZE_64KB + select PGTABLE_2LEVEL + help + This option selects 64KB page size with 2 level page tables, which + support a maximum of 42 bits of application virtual memory. + +config 64KB_3LEVEL + bool "64KB with 3 levels" + select PAGE_SIZE_64KB + select PGTABLE_3LEVEL + help + This option selects 64KB page size with 3 level page tables, which + support a maximum of 55 bits of application virtual memory. + +endchoice + +config CMDLINE + string "Built-in kernel command line" + help + For most platforms, the arguments for the kernel's command line + are provided at run-time, during boot. However, there are cases + where either no arguments are being provided or the provided + arguments are insufficient or even invalid. + + When that occurs, it is possible to define a built-in command + line here and choose how the kernel should use it later on. + +choice + prompt "Kernel command line type" + default CMDLINE_BOOTLOADER + help + Choose how the kernel will handle the provided built-in command + line. + +config CMDLINE_BOOTLOADER + bool "Use bootloader kernel arguments if available" + help + Prefer the command-line passed by the boot loader if available. + Use the built-in command line as fallback in case we get nothing + during boot. This is the default behaviour. + +config CMDLINE_EXTEND + bool "Use built-in to extend bootloader kernel arguments" + help + The command-line arguments provided during boot will be + appended to the built-in command line. This is useful in + cases where the provided arguments are insufficient and + you don't want to or cannot modify them. + +config CMDLINE_FORCE + bool "Always use the built-in kernel command string" + help + Always use the built-in command line, even if we get one during + boot. This is useful in case you need to override the provided + command line on systems where you don't have or want control + over it. + +endchoice + +config DMI + bool "Enable DMI scanning" + select DMI_SCAN_MACHINE_NON_EFI_FALLBACK + default y + help + This enables SMBIOS/DMI feature for systems, and scanning of + DMI to identify machine quirks. + +config EFI + bool "EFI runtime service support" + select UCS2_STRING + select EFI_RUNTIME_WRAPPERS + help + This enables the kernel to use EFI runtime services that are + available (such as the EFI variable services). + +config EFI_STUB + bool "EFI boot stub support" + default y + depends on EFI + select EFI_GENERIC_STUB + help + This kernel feature allows the kernel to be loaded directly by + EFI firmware without the use of a bootloader. + +config SCHED_SMT + bool "SMT scheduler support" + default y + help + Improves scheduler's performance when there are multiple + threads in one physical core. + +config SMP + bool "Multi-Processing support" + 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 + than one CPU, say Y. + + If you say N here, the kernel will run on uni- and multiprocessor + machines, but will use only one CPU of a multiprocessor machine. If + you say Y here, the kernel will run on many, but not all, + uniprocessor machines. On a uniprocessor machine, the kernel + will run faster if you say N here. + + See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. + + If you don't know what to do here, say N. + +config HOTPLUG_CPU + bool "Support for hot-pluggable CPUs" + depends on SMP + select GENERIC_IRQ_MIGRATION + help + Say Y here to allow turning CPUs off and on. CPUs can be + controlled through /sys/devices/system/cpu. + (Note: power management support will enable this option + automatically on SMP systems. ) + Say N if you want to disable CPU hotplug. + +config NR_CPUS + int "Maximum number of CPUs (2-256)" + range 2 256 + depends on SMP + default "64" + help + This allows you to specify the maximum number of CPUs which this + kernel will support. + +config NUMA + bool "NUMA Support" + select SMP + select ACPI_NUMA if ACPI + help + Say Y to compile the kernel with NUMA (Non-Uniform Memory Access) + support. This option improves performance on systems with more + than one NUMA node; on single node systems it is generally better + to leave it disabled. + +config NODES_SHIFT + int + default "6" + depends on NUMA + +config ARCH_FORCE_MAX_ORDER + int "Maximum zone order" + default "13" if PAGE_SIZE_64KB + default "11" if PAGE_SIZE_16KB + default "10" + help + The kernel memory allocator divides physically contiguous memory + blocks into "zones", where each zone is a power of two number of + pages. This option selects the largest power of two that the kernel + keeps in the memory allocator. If you need to allocate very large + blocks of physically contiguous memory, then you may need to + increase this value. + + The page size is not necessarily 4KB. Keep this in mind + when choosing a value for this option. + +config ARCH_IOREMAP + bool "Enable LoongArch DMW-based ioremap()" + help + We use generic TLB-based ioremap() by default since it has page + protection support. However, you can enable LoongArch DMW-based + ioremap() for better performance. + +config ARCH_WRITECOMBINE + bool "Enable WriteCombine (WUC) for ioremap()" + help + LoongArch maintains cache coherency in hardware, but when paired + with LS7A chipsets the WUC attribute (Weak-ordered UnCached, which + is similar to WriteCombine) is out of the scope of cache coherency + machanism for PCIe devices (this is a PCIe protocol violation, which + may be fixed in newer chipsets). + + This means WUC can only used for write-only memory regions now, so + this option is disabled by default, making WUC silently fallback to + SUC for ioremap(). You can enable this option if the kernel is ensured + to run on hardware without this bug. + + You can override this setting via writecombine=on/off boot parameter. + +config ARCH_STRICT_ALIGN + bool "Enable -mstrict-align to prevent unaligned accesses" if EXPERT + default y + help + Not all LoongArch cores support h/w unaligned access, we can use + -mstrict-align build parameter to prevent unaligned accesses. + + CPUs with h/w unaligned access support: + Loongson-2K2000/2K3000/3A5000/3C5000/3D5000. + + CPUs without h/w unaligned access support: + Loongson-2K500/2K1000. + + This option is enabled by default to make the kernel be able to run + on all LoongArch systems. But you can disable it manually if you want + to run kernel only on systems with h/w unaligned access support in + order to optimise for performance. + +config CPU_HAS_FPU + bool + default y + +config CPU_HAS_LSX + bool "Support for the Loongson SIMD Extension" + depends on AS_HAS_LSX_EXTENSION + help + Loongson SIMD Extension (LSX) introduces 128 bit wide vector registers + and a set of SIMD instructions to operate on them. When this option + is enabled the kernel will support allocating & switching LSX + vector register contexts. If you know that your kernel will only be + running on CPUs which do not support LSX or that your userland will + not be making use of it then you may wish to say N here to reduce + the size & complexity of your kernel. + + If unsure, say Y. + +config CPU_HAS_LASX + bool "Support for the Loongson Advanced SIMD Extension" + depends on CPU_HAS_LSX + depends on AS_HAS_LASX_EXTENSION + help + Loongson Advanced SIMD Extension (LASX) introduces 256 bit wide vector + registers and a set of SIMD instructions to operate on them. When this + option is enabled the kernel will support allocating & switching LASX + vector register contexts. If you know that your kernel will only be + running on CPUs which do not support LASX or that your userland will + not be making use of it then you may wish to say N here to reduce + the size & complexity of your kernel. + + If unsure, say Y. + +config CPU_HAS_LBT + bool "Support for the Loongson Binary Translation Extension" + depends on AS_HAS_LBT_EXTENSION + help + Loongson Binary Translation (LBT) introduces 4 scratch registers (SCR0 + to SCR3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). + Enabling this option allows the kernel to allocate and switch registers + specific to LBT. + + If you want to use this feature, such as the Loongson Architecture + Translator (LAT), say Y. + +config CPU_HAS_PREFETCH + bool + default y + +config ARCH_SUPPORTS_KEXEC + def_bool y + +config ARCH_SUPPORTS_CRASH_DUMP + def_bool y + +config ARCH_SELECTS_CRASH_DUMP + def_bool y + depends on CRASH_DUMP + select RELOCATABLE + +config RELOCATABLE + bool "Relocatable kernel" + help + This builds the kernel as a Position Independent Executable (PIE), + which retains all relocation metadata required, so as to relocate + the kernel binary at runtime to a different virtual address from + its link address. + +config RANDOMIZE_BASE + bool "Randomize the address of the kernel (KASLR)" + depends on RELOCATABLE + help + Randomizes the physical and virtual address at which the + kernel image is loaded, as a security feature that + deters exploit attempts relying on knowledge of the location + of kernel internals. + + The kernel will be offset by up to RANDOMIZE_BASE_MAX_OFFSET. + + If unsure, say N. + +config RANDOMIZE_BASE_MAX_OFFSET + hex "Maximum KASLR offset" if EXPERT + depends on RANDOMIZE_BASE + range 0x0 0x10000000 + default "0x01000000" + help + When KASLR is active, this provides the maximum offset that will + be applied to the kernel image. It should be set according to the + amount of physical RAM available in the target system. + + This is limited by the size of the lower address memory, 256MB. + +config SECCOMP + bool "Enable seccomp to safely compute untrusted bytecode" + depends on PROC_FS + default y + help + This kernel feature is useful for number crunching applications + that may need to compute untrusted bytecode during their + execution. By using pipes or other transports made available to + the process as file descriptors supporting the read/write + syscalls, it's possible to isolate those applications in + their own address space using seccomp. Once seccomp is + enabled via /proc/<pid>/seccomp, it cannot be disabled + and the task is only allowed to execute a few safe syscalls + defined by each seccomp mode. + + If unsure, say Y. Only embedded should say N here. + +endmenu + +config ARCH_SELECT_MEMORY_MODEL + def_bool y + +config ARCH_FLATMEM_ENABLE + def_bool y + depends on !NUMA + +config ARCH_SPARSEMEM_ENABLE + def_bool y + select SPARSEMEM_VMEMMAP_ENABLE + help + Say Y to support efficient handling of sparse physical memory, + for architectures which are either NUMA (Non-Uniform Memory Access) + or have huge holes in the physical address space for other reasons. + See <file:Documentation/mm/numa.rst> for more. + +config ARCH_ENABLE_THP_MIGRATION + def_bool y + depends on TRANSPARENT_HUGEPAGE + +config ARCH_MEMORY_PROBE + def_bool y + depends on MEMORY_HOTPLUG + +config MMU + bool + default y + +config ARCH_MMAP_RND_BITS_MIN + default 12 + +config ARCH_MMAP_RND_BITS_MAX + default 18 + +config ARCH_SUPPORTS_UPROBES + def_bool y + +config KASAN_SHADOW_OFFSET + hex + default 0x0 + depends on KASAN + +menu "Power management options" + +config ARCH_SUSPEND_POSSIBLE + def_bool y + +config ARCH_HIBERNATION_POSSIBLE + def_bool y + +source "kernel/power/Kconfig" +source "drivers/acpi/Kconfig" + +endmenu |