linux-kernel - Re: [RFC -tip] x86,apic -- reduce disable

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Message-ID: <alpine.LFD.2.00.0907051737100.13862@eddie.linux-mips.org>
Date:	Sun, 5 Jul 2009 17:38:52 +0100 (BST)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Yinghai Lu <yinghai@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC -tip] x86,apic -- reduce disable_apic usage

On Sun, 5 Jul 2009, Cyrill Gorcunov wrote:

> Here is an attempt to bring more consistency for apic
> presence check. I hope I covered all the code flows.
> Though it's RFC. Please review and test if possible.
> 
> 	-- Cyrill
> ---
> Instead of messing with (cpu_has_apic|disable_apic)
> to check if we have apic functional, better to distinguish
> them by logical kind. cpu_has_apic -- to check if we may
> use apic functionality, disable_apic -- to note that
> apic was disabled via command line.

 How do you set cpu_has_apic for systems with discrete local APICs?  The 
CPUID flag is not set in this case.

  Maciej
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