diff options
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 86 |
1 files changed, 82 insertions, 4 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index f6df30e8d1..e3142ce531 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -53,24 +53,28 @@ config RISCV select ARCH_USE_MEMTEST select ARCH_USE_QUEUED_RWLOCKS select ARCH_USES_CFI_TRAPS if CFI_CLANG + select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP && MMU 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_HUGETLB_VMEMMAP + select ARCH_WANTS_NO_INSTR 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 CLINT_TIMER if !MMU select CLONE_BACKWARDS select COMMON_CLK - select CPU_PM if CPU_IDLE || HIBERNATION + select CPU_PM if CPU_IDLE || HIBERNATION || SUSPEND select EDAC_SUPPORT select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE) + select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE select GENERIC_ARCH_TOPOLOGY select GENERIC_ATOMIC64 if !64BIT select GENERIC_CLOCKEVENTS_BROADCAST if SMP + select GENERIC_CPU_DEVICES select GENERIC_EARLY_IOREMAP select GENERIC_ENTRY select GENERIC_GETTIMEOFDAY if HAVE_GENERIC_VDSO @@ -113,6 +117,7 @@ config RISCV select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS if MMU select HAVE_DYNAMIC_FTRACE if !XIP_KERNEL && MMU && (CLANG_SUPPORTS_DYNAMIC_FTRACE || GCC_SUPPORTS_DYNAMIC_FTRACE) + select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE select HAVE_FTRACE_MCOUNT_RECORD if !XIP_KERNEL select HAVE_FUNCTION_GRAPH_TRACER @@ -140,6 +145,8 @@ config RISCV select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RETHOOK if !XIP_KERNEL select HAVE_RSEQ + select HAVE_SAMPLE_FTRACE_DIRECT + select HAVE_SAMPLE_FTRACE_DIRECT_MULTI select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU @@ -181,6 +188,20 @@ config HAVE_SHADOW_CALL_STACK # https://github.com/riscv-non-isa/riscv-elf-psabi-doc/commit/a484e843e6eeb51f0cb7b8819e50da6d2444d769 depends on $(ld-option,--no-relax-gp) +config RISCV_USE_LINKER_RELAXATION + def_bool y + # https://github.com/llvm/llvm-project/commit/6611d58f5bbcbec77262d392e2923e1d680f6985 + depends on !LD_IS_LLD || LLD_VERSION >= 150000 + +# https://github.com/llvm/llvm-project/commit/bbc0f99f3bc96f1db16f649fc21dd18e5b0918f6 +config ARCH_HAS_BROKEN_DWARF5 + def_bool y + depends on RISCV_USE_LINKER_RELAXATION + # https://github.com/llvm/llvm-project/commit/1df5ea29b43690b6622db2cad7b745607ca4de6a + depends on AS_IS_LLVM && AS_VERSION < 180000 + # https://github.com/llvm/llvm-project/commit/7ffabb61a5569444b5ac9322e22e5471cc5e4a77 + depends on LD_IS_LLD && LLD_VERSION < 180000 + config ARCH_MMAP_RND_BITS_MIN default 18 if 64BIT default 8 @@ -413,7 +434,9 @@ config NUMA depends on SMP && MMU select ARCH_SUPPORTS_NUMA_BALANCING select GENERIC_ARCH_NUMA + select HAVE_SETUP_PER_CPU_AREA select NEED_PER_CPU_EMBED_FIRST_CHUNK + select NEED_PER_CPU_PAGE_FIRST_CHUNK select OF_NUMA select USE_PERCPU_NUMA_NODE_ID help @@ -524,6 +547,28 @@ config RISCV_ISA_V_DEFAULT_ENABLE If you don't know what to do here, say Y. +config RISCV_ISA_V_UCOPY_THRESHOLD + int "Threshold size for vectorized user copies" + depends on RISCV_ISA_V + default 768 + help + Prefer using vectorized copy_to_user()/copy_from_user() when the + workload size exceeds this value. + +config RISCV_ISA_V_PREEMPTIVE + bool "Run kernel-mode Vector with kernel preemption" + depends on PREEMPTION + depends on RISCV_ISA_V + default y + help + Usually, in-kernel SIMD routines are run with preemption disabled. + Functions which envoke long running SIMD thus must yield core's + vector unit to prevent blocking other tasks for too long. + + This config allows kernel to run SIMD without explicitly disable + preemption. Enabling this config will result in higher memory + consumption due to the allocation of per-task's kernel Vector context. + config TOOLCHAIN_HAS_ZBB bool default y @@ -650,6 +695,20 @@ config RISCV_MISALIGNED load/store for both kernel and userspace. When disable, misaligned accesses will generate SIGBUS in userspace and panic in kernel. +config RISCV_EFFICIENT_UNALIGNED_ACCESS + bool "Assume the CPU supports fast unaligned memory accesses" + depends on NONPORTABLE + select DCACHE_WORD_ACCESS if MMU + select HAVE_EFFICIENT_UNALIGNED_ACCESS + help + Say Y here if you want the kernel to assume that the CPU supports + efficient unaligned memory accesses. When enabled, this option + improves the performance of the kernel on such CPUs. However, the + kernel will run much more slowly, or will not be able to run at all, + on CPUs that do not support efficient unaligned memory accesses. + + If unsure what to do here, say N. + endmenu # "Platform type" menu "Kernel features" @@ -721,6 +780,25 @@ config COMPAT If you want to execute 32-bit userspace applications, say Y. +config PARAVIRT + bool "Enable paravirtualization code" + depends on RISCV_SBI + help + This changes the kernel so it can modify itself when it is run + under a hypervisor, potentially improving performance significantly + over full virtualization. + +config PARAVIRT_TIME_ACCOUNTING + bool "Paravirtual steal time accounting" + depends on PARAVIRT + help + Select this option to enable fine granularity task steal time + accounting. Time spent executing other tasks in parallel with + the current vCPU is discounted from the vCPU power. To account for + that, there can be a small performance impact. + + If in doubt, say N here. + config RELOCATABLE bool "Build a relocatable kernel" depends on MMU && 64BIT && !XIP_KERNEL @@ -901,13 +979,13 @@ config RISCV_ISA_FALLBACK on the replacement properties, "riscv,isa-base" and "riscv,isa-extensions". -endmenu # "Boot options" - config BUILTIN_DTB - bool + bool "Built-in device tree" depends on OF && NONPORTABLE default y if XIP_KERNEL +endmenu # "Boot options" + config PORTABLE bool default !NONPORTABLE |