Re: [PATCH v8 09/12] x86/cpu: Add a configuration and command line option for Key Locker

Borislav Petkov
2023-06-03T16:42:11Z

On Sat, Jun 03, 2023 at 08:22:24AM -0700, Chang S. Bae wrote:
> +static __init int x86_nokeylocker_setup(char *arg)
> +{
> + /* Expect an exact match without trailing characters. */
> + if (strlen(arg))
> + return 0;
> +
> + if (!cpu_feature_enabled(X86_FEATURE_KEYLOCKER))
> + return 1;
> +
> + setup_clear_cpu_cap(X86_FEATURE_KEYLOCKER);
> + pr_info("x86/keylocker: Disabled by kernel command line.\n");
> + return 1;
> +}
> +__setup("nokeylocker", x86_nokeylocker_setup);

Can we stop adding those just to remove them at some point later but
simply do:

clearcpuid=keylocker

?

--
Regards/Gruss,
Boris.