2022-05-31 18:04:11 +08:00
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# SPDX-License-Identifier: GPL-2.0
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config LOONGARCH
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bool
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default y
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2022-08-06 15:19:32 +08:00
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select ACPI
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2022-07-20 18:51:24 +08:00
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select ACPI_GENERIC_GSI if ACPI
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2022-08-06 15:19:33 +08:00
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select ACPI_MCFG if ACPI
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2022-05-31 18:04:11 +08:00
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select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
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select ARCH_BINFMT_ELF_STATE
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select ARCH_ENABLE_MEMORY_HOTPLUG
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select ARCH_ENABLE_MEMORY_HOTREMOVE
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select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
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2022-09-29 02:21:54 +08:00
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select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
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2022-05-31 18:04:11 +08:00
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select ARCH_HAS_PTE_SPECIAL
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select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
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select ARCH_INLINE_READ_LOCK if !PREEMPTION
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select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
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select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION
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select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION
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select ARCH_INLINE_READ_UNLOCK if !PREEMPTION
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select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION
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select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION
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select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION
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select ARCH_INLINE_WRITE_LOCK if !PREEMPTION
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select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION
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select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION
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select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION
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select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION
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select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION
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select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION
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select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION
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select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION
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select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION
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select ARCH_INLINE_SPIN_LOCK if !PREEMPTION
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select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION
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select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION
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select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION
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select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION
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select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION
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select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION
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select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
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2022-09-02 22:33:42 +08:00
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select ARCH_KEEP_MEMBLOCK
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2022-05-31 18:04:11 +08:00
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select ARCH_MIGHT_HAVE_PC_PARPORT
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select ARCH_MIGHT_HAVE_PC_SERIO
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select ARCH_SPARSEMEM_ENABLE
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2022-08-06 16:10:04 +08:00
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select ARCH_STACKWALK
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2022-05-31 18:04:11 +08:00
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select ARCH_SUPPORTS_ACPI
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select ARCH_SUPPORTS_ATOMIC_RMW
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select ARCH_SUPPORTS_HUGETLBFS
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2022-05-31 18:04:12 +08:00
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select ARCH_SUPPORTS_NUMA_BALANCING
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2022-05-31 18:04:11 +08:00
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select ARCH_USE_BUILTIN_BSWAP
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select ARCH_USE_CMPXCHG_LOCKREF
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select ARCH_USE_QUEUED_RWLOCKS
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2022-10-12 16:36:14 +08:00
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select ARCH_USE_QUEUED_SPINLOCKS
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2022-05-31 18:04:11 +08:00
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select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
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2022-10-27 20:52:53 +08:00
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select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
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2022-08-24 23:31:10 +08:00
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select ARCH_WANT_LD_ORPHAN_WARN
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2022-05-31 18:04:11 +08:00
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select ARCH_WANTS_NO_INSTR
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select BUILDTIME_TABLE_SORT
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select COMMON_CLK
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2022-12-10 22:40:15 +08:00
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select CPU_PM
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2022-08-06 15:19:32 +08:00
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select EFI
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2022-05-31 18:04:11 +08:00
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select GENERIC_CLOCKEVENTS
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select GENERIC_CMOS_UPDATE
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select GENERIC_CPU_AUTOPROBE
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select GENERIC_ENTRY
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select GENERIC_GETTIMEOFDAY
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2022-10-12 16:36:14 +08:00
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select GENERIC_IOREMAP if !ARCH_IOREMAP
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2022-05-31 18:04:11 +08:00
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select GENERIC_IRQ_MULTI_HANDLER
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select GENERIC_IRQ_PROBE
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select GENERIC_IRQ_SHOW
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select GENERIC_LIB_ASHLDI3
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select GENERIC_LIB_ASHRDI3
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select GENERIC_LIB_CMPDI2
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select GENERIC_LIB_LSHRDI3
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select GENERIC_LIB_UCMPDI2
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2022-10-12 16:36:14 +08:00
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select GENERIC_LIB_DEVMEM_IS_ALLOWED
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2022-05-31 18:04:11 +08:00
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select GENERIC_PCI_IOMAP
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select GENERIC_SCHED_CLOCK
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2022-05-31 18:04:12 +08:00
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select GENERIC_SMP_IDLE_THREAD
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2022-05-31 18:04:11 +08:00
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select GENERIC_TIME_VSYSCALL
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select GPIOLIB
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select HAVE_ARCH_AUDITSYSCALL
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select HAVE_ARCH_MMAP_RND_BITS if MMU
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select HAVE_ARCH_SECCOMP_FILTER
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select HAVE_ARCH_TRACEHOOK
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE
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select HAVE_ASM_MODVERSIONS
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2022-06-08 22:40:24 +08:00
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select HAVE_CONTEXT_TRACKING_USER
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2022-12-10 22:40:15 +08:00
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select HAVE_C_RECORDMCOUNT
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2022-05-31 18:04:11 +08:00
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select HAVE_DEBUG_STACKOVERFLOW
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select HAVE_DMA_CONTIGUOUS
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2022-12-10 22:40:15 +08:00
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select HAVE_DYNAMIC_FTRACE
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2022-12-10 22:40:16 +08:00
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select HAVE_DYNAMIC_FTRACE_WITH_ARGS
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2022-12-10 22:40:15 +08:00
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select HAVE_DYNAMIC_FTRACE_WITH_REGS
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2022-10-12 16:36:20 +08:00
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select HAVE_EBPF_JIT
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2023-02-25 15:52:56 +08:00
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select HAVE_EFFICIENT_UNALIGNED_ACCESS if !ARCH_STRICT_ALIGN
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2022-05-31 18:04:11 +08:00
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select HAVE_EXIT_THREAD
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select HAVE_FAST_GUP
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2022-12-10 22:40:15 +08:00
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select HAVE_FTRACE_MCOUNT_RECORD
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2022-12-10 22:40:15 +08:00
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select HAVE_FUNCTION_GRAPH_TRACER
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select HAVE_FUNCTION_TRACER
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2022-05-31 18:04:11 +08:00
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select HAVE_GENERIC_VDSO
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select HAVE_IOREMAP_PROT
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select HAVE_IRQ_EXIT_ON_IRQ_STACK
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select HAVE_IRQ_TIME_ACCOUNTING
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select HAVE_MOD_ARCH_SPECIFIC
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select HAVE_NMI
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2022-08-06 15:19:33 +08:00
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select HAVE_PCI
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2022-05-31 18:04:11 +08:00
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select HAVE_PERF_EVENTS
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2022-10-12 16:36:14 +08:00
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select HAVE_PERF_REGS
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select HAVE_PERF_USER_STACK_DUMP
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2022-05-31 18:04:11 +08:00
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select HAVE_REGS_AND_STACK_ACCESS_API
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select HAVE_RSEQ
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2022-05-31 18:04:12 +08:00
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select HAVE_SETUP_PER_CPU_AREA if NUMA
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2022-12-10 22:40:15 +08:00
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select HAVE_STACKPROTECTOR
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2022-05-31 18:04:11 +08:00
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_TIF_NOHZ
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2022-05-31 18:04:12 +08:00
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select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
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2022-05-31 18:04:11 +08:00
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select IRQ_FORCED_THREADING
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select IRQ_LOONGARCH_CPU
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2022-08-06 15:19:32 +08:00
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select MMU_GATHER_MERGE_VMAS if MMU
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2022-05-31 18:04:11 +08:00
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select MODULES_USE_ELF_RELA if MODULES
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2022-05-31 18:04:12 +08:00
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select NEED_PER_CPU_EMBED_FIRST_CHUNK
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select NEED_PER_CPU_PAGE_FIRST_CHUNK
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2022-12-10 22:40:05 +08:00
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select OF
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select OF_EARLY_FLATTREE
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2022-08-06 15:19:33 +08:00
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select PCI
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select PCI_DOMAINS_GENERIC
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select PCI_ECAM if ACPI
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select PCI_LOONGSON
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select PCI_MSI_ARCH_FALLBACKS
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2022-08-25 19:34:59 +08:00
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select PCI_QUIRKS
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2022-05-31 18:04:11 +08:00
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select PERF_USE_VMALLOC
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select RTC_LIB
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2022-08-06 15:19:32 +08:00
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select SMP
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2022-05-31 18:04:11 +08:00
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select SPARSE_IRQ
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2022-12-10 22:39:59 +08:00
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select SYSCTL_ARCH_UNALIGN_ALLOW
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select SYSCTL_ARCH_UNALIGN_NO_WARN
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2022-05-31 18:04:11 +08:00
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select SYSCTL_EXCEPTION_TRACE
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select SWIOTLB
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select TRACE_IRQFLAGS_SUPPORT
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2022-05-31 18:04:12 +08:00
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select USE_PERCPU_NUMA_NODE_ID
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2022-08-06 16:10:05 +08:00
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select USER_STACKTRACE_SUPPORT
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2022-05-31 18:04:11 +08:00
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select ZONE_DMA32
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config 32BIT
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bool
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config 64BIT
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def_bool y
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config CPU_HAS_FPU
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bool
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default y
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config CPU_HAS_PREFETCH
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bool
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default y
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2022-10-12 16:36:19 +08:00
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config GENERIC_BUG
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def_bool y
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depends on BUG
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config GENERIC_BUG_RELATIVE_POINTERS
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def_bool y
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depends on GENERIC_BUG
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2022-05-31 18:04:11 +08:00
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config GENERIC_CSUM
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def_bool y
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config GENERIC_HWEIGHT
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def_bool y
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config L1_CACHE_SHIFT
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int
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default "6"
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config LOCKDEP_SUPPORT
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bool
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2022-08-06 16:10:04 +08:00
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default y
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config STACKTRACE_SUPPORT
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bool
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2022-05-31 18:04:11 +08:00
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default y
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2022-10-12 16:36:08 +08:00
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# MACH_LOONGSON32 and MACH_LOONGSON64 are deliberately carried over from the
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2022-05-31 18:04:11 +08:00
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# MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
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# are shared between architectures, and specifically expecting the symbols.
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config MACH_LOONGSON32
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def_bool 32BIT
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config MACH_LOONGSON64
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def_bool 64BIT
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2022-10-12 16:36:14 +08:00
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config FIX_EARLYCON_MEM
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def_bool y
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2022-05-31 18:04:11 +08:00
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config PAGE_SIZE_4KB
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bool
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config PAGE_SIZE_16KB
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bool
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config PAGE_SIZE_64KB
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bool
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config PGTABLE_2LEVEL
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bool
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config PGTABLE_3LEVEL
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bool
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config PGTABLE_4LEVEL
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bool
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config PGTABLE_LEVELS
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int
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default 2 if PGTABLE_2LEVEL
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default 3 if PGTABLE_3LEVEL
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default 4 if PGTABLE_4LEVEL
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config SCHED_OMIT_FRAME_POINTER
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bool
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default y
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2022-10-12 16:36:08 +08:00
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config AS_HAS_EXPLICIT_RELOCS
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def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x))
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2022-05-31 18:04:11 +08:00
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menu "Kernel type and options"
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source "kernel/Kconfig.hz"
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choice
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prompt "Page Table Layout"
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default 16KB_2LEVEL if 32BIT
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default 16KB_3LEVEL if 64BIT
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help
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Allows choosing the page table layout, which is a combination
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of page size and page table levels. The size of virtual memory
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address space are determined by the page table layout.
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config 4KB_3LEVEL
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bool "4KB with 3 levels"
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select PAGE_SIZE_4KB
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select PGTABLE_3LEVEL
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help
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This option selects 4KB page size with 3 level page tables, which
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support a maximum of 39 bits of application virtual memory.
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config 4KB_4LEVEL
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bool "4KB with 4 levels"
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select PAGE_SIZE_4KB
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select PGTABLE_4LEVEL
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help
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This option selects 4KB page size with 4 level page tables, which
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support a maximum of 48 bits of application virtual memory.
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config 16KB_2LEVEL
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bool "16KB with 2 levels"
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select PAGE_SIZE_16KB
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select PGTABLE_2LEVEL
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help
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This option selects 16KB page size with 2 level page tables, which
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support a maximum of 36 bits of application virtual memory.
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config 16KB_3LEVEL
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bool "16KB with 3 levels"
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select PAGE_SIZE_16KB
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select PGTABLE_3LEVEL
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help
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This option selects 16KB page size with 3 level page tables, which
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support a maximum of 47 bits of application virtual memory.
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config 64KB_2LEVEL
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bool "64KB with 2 levels"
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select PAGE_SIZE_64KB
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select PGTABLE_2LEVEL
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help
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This option selects 64KB page size with 2 level page tables, which
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support a maximum of 42 bits of application virtual memory.
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config 64KB_3LEVEL
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bool "64KB with 3 levels"
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select PAGE_SIZE_64KB
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select PGTABLE_3LEVEL
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help
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This option selects 64KB page size with 3 level page tables, which
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support a maximum of 55 bits of application virtual memory.
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endchoice
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config CMDLINE
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string "Built-in kernel command line"
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help
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For most platforms, the arguments for the kernel's command line
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are provided at run-time, during boot. However, there are cases
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where either no arguments are being provided or the provided
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arguments are insufficient or even invalid.
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When that occurs, it is possible to define a built-in command
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line here and choose how the kernel should use it later on.
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choice
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prompt "Kernel command line type"
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default CMDLINE_BOOTLOADER
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help
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Choose how the kernel will handle the provided built-in command
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line.
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config CMDLINE_BOOTLOADER
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bool "Use bootloader kernel arguments if available"
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help
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Prefer the command-line passed by the boot loader if available.
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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).
|
|
|
|
|
efi/loongarch: Add efistub booting support
This patch adds efistub booting support, which is the standard UEFI boot
protocol for LoongArch to use.
We use generic efistub, which means we can pass boot information (i.e.,
system table, memory map, kernel command line, initrd) via a light FDT
and drop a lot of non-standard code.
We use a flat mapping to map the efi runtime in the kernel's address
space. In efi, VA = PA; in kernel, VA = PA + PAGE_OFFSET. As a result,
flat mapping is not identity mapping, SetVirtualAddressMap() is still
needed for the efi runtime.
Tested-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
[ardb: change fpic to fpie as suggested by Xi Ruoyao]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
2022-08-19 18:20:37 +08:00
|
|
|
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.
|
|
|
|
|
2022-05-31 18:04:12 +08:00
|
|
|
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.
|
|
|
|
|
2022-05-31 18:04:12 +08:00
|
|
|
config NUMA
|
|
|
|
bool "NUMA Support"
|
LoongArch: Fix the !CONFIG_SMP build
1, We assume arch/loongarch/include/asm/smp.h be included in include/
linux/smp.h is valid and the reverse inclusion isn't. So remove the
<linux/smp.h> in arch/loongarch/include/asm/smp.h.
2, arch/loongarch/include/asm/smp.h is only needed when CONFIG_SMP,
and setup.c include it only because it need plat_smp_setup(). So,
reorganize setup.c & smp.h, and then remove <asm/smp.h> in setup.c.
3, Fix cacheinfo.c and percpu.h build error by adding the missing header
files when !CONFIG_SMP.
4, Fix acpi.c build error by adding CONFIG_SMP guards.
5, Move irq_stat definition from smp.c to irq.c and fix its declaration.
6, Select CONFIG_SMP for CONFIG_NUMA, similar as other architectures do.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-05 16:19:53 +08:00
|
|
|
select SMP
|
2022-05-31 18:04:12 +08:00
|
|
|
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
|
|
|
|
|
2022-08-15 22:39:59 +08:00
|
|
|
config ARCH_FORCE_MAX_ORDER
|
2022-05-31 18:04:11 +08:00
|
|
|
int "Maximum zone order"
|
|
|
|
range 14 64 if PAGE_SIZE_64KB
|
|
|
|
default "14" if PAGE_SIZE_64KB
|
|
|
|
range 12 64 if PAGE_SIZE_16KB
|
|
|
|
default "12" if PAGE_SIZE_16KB
|
|
|
|
range 11 64
|
|
|
|
default "11"
|
|
|
|
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.
|
|
|
|
|
|
|
|
This config option is actually maximum order plus one. For example,
|
|
|
|
a value of 11 means that the largest free memory block is 2^10 pages.
|
|
|
|
|
|
|
|
The page size is not necessarily 4KB. Keep this in mind
|
|
|
|
when choosing a value for this option.
|
|
|
|
|
2022-10-12 16:36:14 +08:00
|
|
|
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.
|
|
|
|
|
2023-02-25 15:52:56 +08:00
|
|
|
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.
|
|
|
|
|
2022-10-12 16:36:19 +08:00
|
|
|
config KEXEC
|
|
|
|
bool "Kexec system call"
|
|
|
|
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.
|
|
|
|
|
LoongArch: Add kdump support
This patch adds support for kdump. In kdump case the normal kernel will
reserve a region for the crash kernel and jump there on panic.
Arch-specific functions are added to allow for implementing a crash dump
file interface, /proc/vmcore, which can be viewed as a ELF file.
A user-space tool, such as kexec-tools, is responsible for allocating a
separate region for the core's ELF header within the crash kdump kernel
memory and filling it in when executing kexec_load().
Then, its location will be advertised to the crash dump kernel via a
command line argument "elfcorehdr=", and the crash dump kernel will
preserve this region for later use with arch_reserve_vmcore() at boot
time.
At the same time, the crash kdump kernel is also limited within the
"crashkernel" area via a command line argument "mem=", so as not to
destroy the original kernel dump data.
In the crash dump kernel environment, /proc/vmcore is used to access the
primary kernel's memory with copy_oldmem_page().
I tested kdump on LoongArch machines (Loongson-3A5000) and it works as
expected (suggested crashkernel parameter is "crashkernel=512M@2560M"),
you may test it by triggering a crash through /proc/sysrq-trigger:
$ sudo kexec -p /boot/vmlinux-kdump --reuse-cmdline --append="nr_cpus=1"
# echo c > /proc/sysrq-trigger
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-10-12 16:36:19 +08:00
|
|
|
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 PHYSICAL_START
|
|
|
|
hex "Physical address where the kernel is loaded"
|
|
|
|
default "0x90000000a0000000"
|
|
|
|
depends on CRASH_DUMP
|
|
|
|
help
|
|
|
|
This gives the XKPRANGE address where the kernel is loaded.
|
|
|
|
If you plan to use kernel for capturing the crash dump change
|
|
|
|
this value to start of the reserved region (the "X" value as
|
|
|
|
specified in the "crashkernel=YM@XM" command line boot parameter
|
|
|
|
passed to the panic-ed kernel).
|
|
|
|
|
2022-05-31 18:04:11 +08:00
|
|
|
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
|
2022-05-31 18:04:12 +08:00
|
|
|
depends on !NUMA
|
2022-05-31 18:04:11 +08:00
|
|
|
|
|
|
|
config ARCH_SPARSEMEM_ENABLE
|
|
|
|
def_bool y
|
2022-10-27 20:52:51 +08:00
|
|
|
select SPARSEMEM_VMEMMAP_ENABLE
|
2022-05-31 18:04:11 +08:00
|
|
|
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.
|
2022-06-27 14:00:26 +08:00
|
|
|
See <file:Documentation/mm/numa.rst> for more.
|
2022-05-31 18:04:11 +08:00
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
menu "Power management options"
|
|
|
|
|
2022-12-10 22:40:15 +08:00
|
|
|
config ARCH_SUSPEND_POSSIBLE
|
|
|
|
def_bool y
|
|
|
|
|
2022-12-10 22:40:15 +08:00
|
|
|
config ARCH_HIBERNATION_POSSIBLE
|
|
|
|
def_bool y
|
|
|
|
|
2022-12-10 22:40:15 +08:00
|
|
|
source "kernel/power/Kconfig"
|
2022-05-31 18:04:11 +08:00
|
|
|
source "drivers/acpi/Kconfig"
|
|
|
|
|
|
|
|
endmenu
|
|
|
|
|
|
|
|
source "drivers/firmware/Kconfig"
|