On Tue, Mar 16, 2021 at 08:10:26AM -0700, Yu-cheng Yu wrote: > Control-flow Enforcement (CET) is a new Intel processor feature that blocks > return/jump-oriented programming attacks. Details are in "Intel 64 and > IA-32 Architectures Software Developer's Manual" [1]. > > CET can protect applications and the kernel. This series enables only > application-level protection, and has three parts: > > - Shadow stack [2], > - Indirect branch tracking [3], and > - Selftests [4]. CET is marketing; afaict SS and IBT are 100% independent and there's no reason what so ever to have them share any code, let alone a Kconfig knob. In fact, I think all of this would improve is you remove the CET name from all of this entirely. Put this series under CONFIG_X86_SHSTK (or _SS) and use CONFIG_X86_IBT for the other one. Similarly with the .c file. All this CET business is just pure confusion.
