linux-kernel - Re: [patch 3/6] x86: use cpuinfo to check for interrupt pending message msr

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Date:	Fri, 13 Jun 2008 14:38:30 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andreas Herrmann <andreas.herrmann3@....com>
cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Arjan van de Veen <arjan@...radead.org>
Subject: Re: [patch 3/6] x86: use cpuinfo to check for interrupt pending
 message msr

On Fri, 13 Jun 2008, Andreas Herrmann wrote:
> > +	/* Family 0x0f models < rev F do not have this MSR */
> > +	if (c->x86 == 0x0f && c->x86_model < 0x40)
> > +		return 0;
> 
> Just some minor nitpicking.
> Older AMD family 0xf CPUs have this Interrupt Pending Message
> Register. But they do not support C1E and thus bits 27 and 28 of this
> MSR are reserved.

So the check can be simplified to always check the MSR for all 
family >= 0x0f CPUs ?

Thanks,

	tglx
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