Re: [PATCH v19 04/25] x86/cpufeatures: Introduce X86_FEATURE_CET and setup functions

Borislav Petkov
2021-02-05T13:43:17Z

On Wed, Feb 03, 2021 at 02:55:26PM -0800, Yu-cheng Yu wrote:
> @@ -1252,6 +1260,13 @@ static void __init cpu_parse_early_param(void)
> if (cmdline_find_option_bool(boot_command_line, "noxsaves"))
> setup_clear_cpu_cap(X86_FEATURE_XSAVES);
>
> +#ifdef CONFIG_X86_CET
> + if (cmdline_find_option_bool(boot_command_line, "no_user_shstk"))
> + setup_clear_cpu_cap(X86_FEATURE_SHSTK);
> + if (cmdline_find_option_bool(boot_command_line, "no_user_ibt"))
> + setup_clear_cpu_cap(X86_FEATURE_IBT);
> +#endif

Any particular need for the ifdeffery?

--
Regards/Gruss,
Boris.