The user-mode indirect branch tracking support is done mostly by GCC to insert ENDBR64/ENDBR32 instructions at branch targets. The kernel provides CPUID enumeration, feature MSR setup and the allocation of legacy bitmap. Signed-off-by: Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx> --- arch/x86/Kconfig | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 24339a5299da..27bfbd137fbe 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1953,6 +1953,18 @@ config X86_INTEL_SHADOW_STACK_USER If unsure, say y. +config X86_INTEL_BRANCH_TRACKING_USER + prompt "Intel Indirect Branch Tracking for user-mode" + def_bool n + depends on CPU_SUP_INTEL && X86_64 + select X86_INTEL_CET + select ARCH_HAS_PROGRAM_PROPERTIES + ---help--- + Indirect Branch Tracking provides hardware protection against return-/jmp- + oriented programing attacks. + + If unsure, say y + config EFI bool "EFI runtime service support" depends on ACPI -- 2.15.1
