linux-kernel - Re: [PATCH -v8] x86: Disable x2apic if nox2apic is specified or intr-remap can not be enabled

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Message-ID: <1324364041.2286.26.camel@sbsiddha-mobl2>
Date:	Mon, 19 Dec 2011 22:54:01 -0800
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -v8] x86: Disable x2apic if nox2apic is specified or
 intr-remap can not be enabled

On Fri, 2011-12-16 at 18:07 -0800, Suresh Siddha wrote:
> b. for nox2apic, as you try to disable x2apic even if the bios has
> enabled it along with interrupt-remapping, this will probably not work
> unless we disable interrupt-remapping.

Looking at the code, this condition should be handled correctly by the
OS by enabling interrupt-remapping in non extended interrupt-mode. So
this case should be ok.

thanks,
suresh

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