Re: [PATCH 04/35] x86/cpufeatures: Introduce CPU setup and option parsing for CET

Dave Hansen
2022-02-07T22:49:49Z

> * Some CPU features depend on higher CPUID levels, which may not always
> * be available due to CPUID level capping or broken virtualization
> @@ -1261,6 +1269,9 @@ static void __init cpu_parse_early_param(void)
> if (cmdline_find_option_bool(boot_command_line, "noxsaves"))
> setup_clear_cpu_cap(X86_FEATURE_XSAVES);
>
> + if (cmdline_find_option_bool(boot_command_line, "no_user_shstk"))
> + setup_clear_cpu_cap(X86_FEATURE_SHSTK);

Given this:

https://lore.kernel.org/all/20220127115626.14179-2-bp@alien8.de/

I'd probably yank the command-line option out of this series, or stick
it in a separate patch that you tack on to the end.