linux-kernel - Re: [PATCH] x86/cpufeatures: Free up unused feature bits

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Message-ID: <5a42aca9-ff38-4fb5-8eb2-a43262c8c630@intel.com>
Date: Thu, 7 Nov 2024 16:35:59 -0800
From: Sohil Mehta <sohil.mehta@...el.com>
To: "H. Peter Anvin" <hpa@...or.com>, Dave Hansen <dave.hansen@...el.com>,
	<x86@...nel.org>, Borislav Petkov <bp@...en8.de>, Dave Hansen
	<dave.hansen@...ux.intel.com>
CC: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
	"Sean Christopherson" <seanjc@...gle.com>, Tony Luck <tony.luck@...el.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/cpufeatures: Free up unused feature bits

On 11/7/2024 3:49 PM, H. Peter Anvin wrote:
>>> -	if (c->x86 == 6)
>>> -		set_cpu_cap(c, X86_FEATURE_P3);
>>
> 
> Be careful - these bits are used in module strings and so modutils need to understand them.

Sorry, I didn't understand this properly. How do I figure out whether
these bits are used elsewhere? Can you please provide a pointer?

Sohil