> + if ((!boot_cpu_has(X86_FEATURE_PTI) &&> + !boot_cpu_has(X86_FEATURE_SMEP)) || is_skylake_era()) {> + setup_force_cpu_cap(X86_FEATURE_RSB_CTXSW);> + pr_info("Filling RSB on context switch\n");> + }Missing an option to turn this off.-Andi