diff options
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 81 |
1 files changed, 66 insertions, 15 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index d1b4ffd6e085..ebe08b9186ad 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -41,6 +41,44 @@ config HOTPLUG_SMT config SMT_NUM_THREADS_DYNAMIC bool +config ARCH_SUPPORTS_SCHED_SMT + bool + +config ARCH_SUPPORTS_SCHED_CLUSTER + bool + +config ARCH_SUPPORTS_SCHED_MC + bool + +config SCHED_SMT + bool "SMT (Hyperthreading) scheduler support" + depends on ARCH_SUPPORTS_SCHED_SMT + default y + help + Improves the CPU scheduler's decision making when dealing with + MultiThreading at a cost of slightly increased overhead in some + places. If unsure say N here. + +config SCHED_CLUSTER + bool "Cluster scheduler support" + depends on ARCH_SUPPORTS_SCHED_CLUSTER + default y + help + Cluster scheduler support improves the CPU scheduler's decision + making when dealing with machines that have clusters of CPUs. + Cluster usually means a couple of CPUs which are placed closely + by sharing mid-level caches, last-level cache tags or internal + busses. + +config SCHED_MC + bool "Multi-Core Cache (MC) scheduler support" + depends on ARCH_SUPPORTS_SCHED_MC + default y + help + Multi-core scheduler support improves the CPU scheduler's decision + making when dealing with multi-core CPU chips at a cost of slightly + increased overhead in some places. If unsure say N here. + # Selected by HOTPLUG_CORE_SYNC_DEAD or HOTPLUG_CORE_SYNC_FULL config HOTPLUG_CORE_SYNC bool @@ -867,22 +905,26 @@ config PROPELLER_CLANG If unsure, say N. -config ARCH_SUPPORTS_CFI_CLANG +config ARCH_SUPPORTS_CFI bool help - An architecture should select this option if it can support Clang's - Control-Flow Integrity (CFI) checking. + An architecture should select this option if it can support Kernel + Control-Flow Integrity (CFI) checking (-fsanitize=kcfi). config ARCH_USES_CFI_TRAPS bool + help + An architecture should select this option if it requires the + .kcfi_traps section for KCFI trap handling. -config CFI_CLANG - bool "Use Clang's Control Flow Integrity (CFI)" - depends on ARCH_SUPPORTS_CFI_CLANG +config CFI + bool "Use Kernel Control Flow Integrity (kCFI)" + default CFI_CLANG + depends on ARCH_SUPPORTS_CFI depends on $(cc-option,-fsanitize=kcfi) help - This option enables Clang's forward-edge Control Flow Integrity - (CFI) checking, where the compiler injects a runtime check to each + This option enables forward-edge Control Flow Integrity (CFI) + checking, where the compiler injects a runtime check to each indirect function call to ensure the target is a valid function with the correct static type. This restricts possible call targets and makes it more difficult for an attacker to exploit bugs that allow @@ -891,10 +933,16 @@ config CFI_CLANG https://clang.llvm.org/docs/ControlFlowIntegrity.html +config CFI_CLANG + bool + transitional + help + Transitional config for CFI_CLANG to CFI migration. + config CFI_ICALL_NORMALIZE_INTEGERS bool "Normalize CFI tags for integers" - depends on CFI_CLANG - depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG + depends on CFI + depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS 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 @@ -907,7 +955,7 @@ config CFI_ICALL_NORMALIZE_INTEGERS This option is necessary for using CFI with Rust. If unsure, say N. -config HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG +config HAVE_CFI_ICALL_NORMALIZE_INTEGERS 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 @@ -915,7 +963,7 @@ config HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG config HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC def_bool y - depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS_CLANG + depends on HAVE_CFI_ICALL_NORMALIZE_INTEGERS 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) || \ @@ -923,7 +971,7 @@ config HAVE_CFI_ICALL_NORMALIZE_INTEGERS_RUSTC config CFI_PERMISSIVE bool "Use CFI in permissive mode" - depends on CFI_CLANG + depends on CFI help When selected, Control Flow Integrity (CFI) violations result in a warning instead of a kernel panic. This option should only be used @@ -1475,7 +1523,6 @@ config RANDOMIZE_KSTACK_OFFSET bool "Support for randomizing kernel stack offset on syscall entry" if EXPERT default y depends on HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET - depends on INIT_STACK_NONE || !CC_IS_CLANG || CLANG_VERSION >= 140000 help The kernel stack offset can be randomized (after pt_regs) by roughly 5 bits of entropy, frustrating memory corruption @@ -1609,7 +1656,7 @@ config HAVE_SPARSE_SYSCALL_NR related optimizations for a given architecture. config ARCH_HAS_VDSO_ARCH_DATA - depends on GENERIC_VDSO_DATA_STORE + depends on HAVE_GENERIC_VDSO bool config ARCH_HAS_VDSO_TIME_DATA @@ -1730,6 +1777,10 @@ config ARCH_VMLINUX_NEEDS_RELOCS relocations preserved. This is used by some architectures to construct bespoke relocation tables for KASLR. +# Select if architecture uses the common generic TIF bits +config HAVE_GENERIC_TIF_BITS + bool + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" |