linux-kernel - Re: [RFC PATCH 0/4] wire up CPU features to udev based module loading

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Message-ID: <527C0195.50008@zytor.com>
Date:	Thu, 07 Nov 2013 13:09:41 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ard Biesheuvel <ard.biesheuvel@...aro.org>, x86@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
CC:	gregkh@...uxfoundation.org, catalin.marinas@....com,
	will.deacon@....com, tglx@...utronix.de,
	Ingo Molnar <mingo@...nel.org>, steve.capper@...aro.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [RFC PATCH 0/4] wire up CPU features to udev based module loading

On 11/07/2013 09:17 AM, Ard Biesheuvel wrote:
> This series implements automatic module loading based on optional CPU features,
> and tries to do so in a generic way. Currently, 32 feature bits are supported,
> and how they map to actual CPU features is entirely up to the architecture.

NAK.

We in the x86 world already left 32 bits way behind; we currently have
320 bit feature masks.

If you're aiming at doing this in a generic way, it needs to be able to
accommodate the current x86cpu feature stuff as a subset, which this
doesn't.

	-hpa

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