diff options
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 168 |
1 files changed, 157 insertions, 11 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 9f066785bb71..b0adb665041f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -9,6 +9,23 @@ # source "arch/$(SRCARCH)/Kconfig" +config ARCH_CONFIGURES_CPU_MITIGATIONS + bool + +if !ARCH_CONFIGURES_CPU_MITIGATIONS +config CPU_MITIGATIONS + def_bool y +endif + +# +# Selected by architectures that need custom DMA operations for e.g. legacy +# IOMMUs not handled by dma-iommu. Drivers must never select this symbol. +# +config ARCH_HAS_DMA_OPS + depends on HAS_DMA + select DMA_OPS_HELPERS + bool + menu "General architecture-dependent options" config ARCH_HAS_SUBPAGE_FAULTS @@ -52,10 +69,10 @@ config GENERIC_ENTRY config KPROBES bool "Kprobes" - depends on MODULES depends on HAVE_KPROBES select KALLSYMS - select TASKS_RCU if PREEMPTION + select EXECMEM + select NEED_TASKS_RCU help Kprobes allows you to trap at almost any kernel address and execute a callback function. register_kprobe() establishes @@ -104,7 +121,7 @@ config STATIC_CALL_SELFTEST config OPTPROBES def_bool y depends on KPROBES && HAVE_OPTPROBES - select TASKS_RCU if PREEMPTION + select NEED_TASKS_RCU config KPROBES_ON_FTRACE def_bool y @@ -118,6 +135,7 @@ config KPROBES_ON_FTRACE config UPROBES def_bool n depends on ARCH_SUPPORTS_UPROBES + select TASKS_TRACE_RCU help Uprobes is the user-space counterpart to kprobes: they enable instrumentation applications (such as 'perf probe') @@ -502,6 +520,15 @@ config MMU_LAZY_TLB_SHOOTDOWN config ARCH_HAVE_NMI_SAFE_CMPXCHG bool +config ARCH_HAVE_EXTRA_ELF_NOTES + bool + help + An architecture should select this in order to enable adding an + arch-specific ELF note section to core files. It must provide two + functions: elf_coredump_extra_notes_size() and + elf_coredump_extra_notes_write() which are invoked by the ELF core + dumper. + config ARCH_HAS_NMI_SAFE_THIS_CPU_OPS bool @@ -785,6 +812,45 @@ config LTO_CLANG_THIN If unsure, say Y. endchoice +config ARCH_SUPPORTS_AUTOFDO_CLANG + bool + +config AUTOFDO_CLANG + bool "Enable Clang's AutoFDO build (EXPERIMENTAL)" + depends on ARCH_SUPPORTS_AUTOFDO_CLANG + depends on CC_IS_CLANG && CLANG_VERSION >= 170000 + help + This option enables Clang’s AutoFDO build. When + an AutoFDO profile is specified in variable + CLANG_AUTOFDO_PROFILE during the build process, + Clang uses the profile to optimize the kernel. + + If no profile is specified, AutoFDO options are + still passed to Clang to facilitate the collection + of perf data for creating an AutoFDO profile in + subsequent builds. + + If unsure, say N. + +config ARCH_SUPPORTS_PROPELLER_CLANG + bool + +config PROPELLER_CLANG + bool "Enable Clang's Propeller build" + depends on ARCH_SUPPORTS_PROPELLER_CLANG + depends on CC_IS_CLANG && CLANG_VERSION >= 190000 + help + This option enables Clang’s Propeller build. When the Propeller + profiles is specified in variable CLANG_PROPELLER_PROFILE_PREFIX + during the build process, Clang uses the profiles to optimize + the kernel. + + If no profile is specified, Propeller options are still passed + to Clang to facilitate the collection of perf data for creating + the Propeller profiles in subsequent builds. + + If unsure, say N. + config ARCH_SUPPORTS_CFI_CLANG bool help @@ -809,6 +875,36 @@ config CFI_CLANG https://clang.llvm.org/docs/ControlFlowIntegrity.html +config CFI_ICALL_NORMALIZE_INTEGERS + bool "Normalize CFI tags for integers" + depends on CFI_CLANG + depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG + help + This option normalizes the CFI tags for integer types so that all + integer types of the same size and signedness receive the same CFI + tag. + + The option is separate from CONFIG_RUST because it affects the ABI. + When working with build systems that care about the ABI, it is + convenient to be able to turn on this flag first, before Rust is + turned on. + + This option is necessary for using CFI with Rust. If unsure, say N. + +config HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG + def_bool y + depends on $(cc-option,-fsanitize=kcfi -fsanitize-cfi-icall-experimental-normalize-integers) + # With GCOV/KASAN we need this fix: https://github.com/llvm/llvm-project/pull/104826 + depends on CLANG_VERSION >= 190103 || (!GCOV_KERNEL && !KASAN_GENERIC && !KASAN_SW_TAGS) + +config HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC + def_bool y + depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG + depends on RUSTC_VERSION >= 107900 + # With GCOV/KASAN we need this fix: https://github.com/rust-lang/rust/pull/129373 + depends on (RUSTC_LLVM_VERSION >= 190103 && RUSTC_VERSION >= 108200) || \ + (!GCOV_KERNEL && !KASAN_GENERIC && !KASAN_SW_TAGS) + config CFI_PERMISSIVE bool "Use CFI in permissive mode" depends on CFI_CLANG @@ -845,7 +941,7 @@ config HAVE_CONTEXT_TRACKING_USER_OFFSTACK Architecture neither relies on exception_enter()/exception_exit() nor on schedule_user(). Also preempt_schedule_notrace() and preempt_schedule_irq() can't be called in a preemptible section - while context tracking is CONTEXT_USER. This feature reflects a sane + while context tracking is CT_STATE_USER. This feature reflects a sane entry implementation where the following requirements are met on critical entry code, ie: before user_exit() or after user_enter(): @@ -960,6 +1056,22 @@ config ARCH_WANTS_MODULES_DATA_IN_VMALLOC For architectures like powerpc/32 which have constraints on module allocation and need to allocate module data outside of module area. +config ARCH_WANTS_EXECMEM_LATE + bool + help + For architectures that do not allocate executable memory early on + boot, but rather require its initialization late when there is + enough entropy for module space randomization, for instance + arm64. + +config ARCH_HAS_EXECMEM_ROX + bool + depends on MMU && !HIGHMEM + help + For architectures that support allocations of executable memory + with read-only execute permissions. Architecture must implement + execmem_fill_trapping_insns() callback to enable this. + config HAVE_IRQ_EXIT_ON_IRQ_STACK bool help @@ -1172,12 +1284,12 @@ config PAGE_SIZE_LESS_THAN_256KB config PAGE_SHIFT int - default 12 if PAGE_SIZE_4KB - default 13 if PAGE_SIZE_8KB - default 14 if PAGE_SIZE_16KB - default 15 if PAGE_SIZE_32KB - default 16 if PAGE_SIZE_64KB - default 18 if PAGE_SIZE_256KB + default 12 if PAGE_SIZE_4KB + default 13 if PAGE_SIZE_8KB + default 14 if PAGE_SIZE_16KB + default 15 if PAGE_SIZE_32KB + default 16 if PAGE_SIZE_64KB + default 18 if PAGE_SIZE_256KB # This allows to use a set of generic functions to determine mmap base # address by giving priority to top-down scheme only if the process @@ -1414,6 +1526,14 @@ config HAVE_ARCH_COMPILER_H linux/compiler-*.h in order to override macro definitions that those headers generally provide. +config HAVE_ARCH_LIBGCC_H + bool + help + An architecture can select this if it provides an + asm/libgcc.h header that should be included after + linux/libgcc.h in order to override macro definitions that + header generally provides. + config HAVE_ARCH_PREL32_RELOCATIONS bool help @@ -1464,7 +1584,11 @@ config HAVE_SPARSE_SYSCALL_NR entries at 4000, 5000 and 6000 locations. This option turns on syscall related optimizations for a given architecture. -config ARCH_HAS_VDSO_DATA +config ARCH_HAS_VDSO_ARCH_DATA + depends on GENERIC_VDSO_DATA_STORE + bool + +config ARCH_HAS_VDSO_TIME_DATA bool config HAVE_STATIC_CALL @@ -1569,6 +1693,19 @@ config ARCH_HAS_NONLEAF_PMD_YOUNG address translations. Page table walkers that clear the accessed bit may use this capability to reduce their search space. +config ARCH_HAS_KERNEL_FPU_SUPPORT + bool + help + Architectures that select this option can run floating-point code in + the kernel, as described in Documentation/core-api/floating-point.rst. + +config ARCH_VMLINUX_NEEDS_RELOCS + bool + help + Whether the architecture needs vmlinux to be built with static + relocations preserved. This is used by some architectures to + construct bespoke relocation tables for KASLR. + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" @@ -1609,4 +1746,13 @@ config CC_HAS_SANE_FUNCTION_ALIGNMENT # strict alignment always, even with -falign-functions. def_bool CC_HAS_MIN_FUNCTION_ALIGNMENT || CC_IS_CLANG +config ARCH_NEED_CMPXCHG_1_EMU + bool + +config ARCH_WANTS_PRE_LINK_VMLINUX + bool + help + An architecture can select this if it provides arch/<arch>/tools/Makefile + with .arch.vmlinux.o target to be linked into vmlinux. + endmenu |