linux-kernel - Re: [PATCH 2/2] x86/fpu: Support disabling AVX and AVX512

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Date:   Sat, 11 Mar 2017 09:20:30 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Andi Kleen <andi@...stfloor.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] x86/fpu: Support disabling AVX and AVX512

On Sat, Mar 11, 2017 at 11:46:37AM +0100, Thomas Gleixner wrote:
> > +enum xsave_features {
> > +	XSAVE_X87,
> > +	XSAVE_SSE,
> > +	XSAVE_AVX,
> > +	XSAVE_MPX_BOUNDS,
> > +	XSAVE_MPX_CSR,
> > +	XSAVE_AVX512_OPMASK,
> > +	XSAVE_AVX512_HI256,
> > +	XSAVE_AVX512_ZMM_HI256,
> > +	XSAVE_PT,
> > +	XSAVE_PKU,
> > +	XSAVE_UNKNOWN
> > +};
> 
> What's that enum for? It's unused ....

It's not.  The disable functions use it (although only the AVX parts)

-Andi