Re: [PATCH v3] x86/cpufeatures: Make X86_FEATURE_SHSTK clearcpuid-able

[Borislav Petkov]

I would even want to do that.

Just so that people don't get silly ideas...

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 4d0f545fb3ec..97007f4f69d4 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -789,24 +789,6 @@ Kernel parameters
 	cio_ignore=	[S390]
 			See Documentation/arch/s390/common_io.rst for details.
 
-	clearcpuid=X[,X...] [X86]
-			Disable CPUID feature X for the kernel. See
-			arch/x86/include/asm/cpufeatures.h for the valid bit
-			numbers X. Note the Linux-specific bits are not necessarily
-			stable over kernel options, but the vendor-specific
-			ones should be.
-			X can also be a string as appearing in the flags: line
-			in /proc/cpuinfo which does not have the above
-			instability issue. However, not all features have names
-			in /proc/cpuinfo.
-			Note that using this option will taint your kernel.
-			Also note that user programs calling CPUID directly
-			or using the feature without checking anything
-			will still see it. This just prevents it from
-			being used by the kernel or shown in /proc/cpuinfo.
-			Also note the kernel might malfunction if you disable
-			some critical bits.
-
 	clk_ignore_unused
 			[CLK]
 			Prevents the clock framework from automatically gating

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette